mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
0cd491390d
There was nothing wrong with SetFontFromStyle, except that it's just one more API to think about (and one more API to audit and modify for font inflation work to happen in bug 627842).
4368 lines
148 KiB
C++
4368 lines
148 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=2 sw=2 et tw=78: */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* L. David Baron <dbaron@dbaron.org>, Mozilla Corporation
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* Mats Palmgren <matspal@gmail.com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "nsLayoutUtils.h"
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#include "nsIFormControlFrame.h"
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#include "nsPresContext.h"
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#include "nsIContent.h"
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#include "nsIDOMDocument.h"
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#include "nsIDOMHTMLDocument.h"
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#include "nsIDOMHTMLElement.h"
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#include "nsFrameList.h"
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#include "nsGkAtoms.h"
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#include "nsIAtom.h"
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|
#include "nsCSSPseudoElements.h"
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|
#include "nsCSSAnonBoxes.h"
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#include "nsCSSColorUtils.h"
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#include "nsIView.h"
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|
#include "nsPlaceholderFrame.h"
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#include "nsIScrollableFrame.h"
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#include "nsCSSFrameConstructor.h"
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#include "nsIPrivateDOMEvent.h"
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#include "nsIDOMEvent.h"
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#include "nsGUIEvent.h"
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#include "nsDisplayList.h"
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#include "nsRegion.h"
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#include "nsFrameManager.h"
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#include "nsBlockFrame.h"
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#include "nsBidiPresUtils.h"
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#include "imgIContainer.h"
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#include "gfxRect.h"
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#include "gfxContext.h"
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#include "gfxFont.h"
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#include "nsIInterfaceRequestorUtils.h"
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#include "nsCSSRendering.h"
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#include "nsContentUtils.h"
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#include "nsThemeConstants.h"
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#include "nsPIDOMWindow.h"
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#include "nsIBaseWindow.h"
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|
#include "nsIDocShell.h"
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#include "nsIDocShellTreeItem.h"
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#include "nsIWidget.h"
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|
#include "gfxMatrix.h"
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#include "gfxPoint3D.h"
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#include "gfxTypes.h"
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#include "gfxUserFontSet.h"
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#include "nsTArray.h"
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#include "nsHTMLCanvasElement.h"
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#include "nsICanvasRenderingContextInternal.h"
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#include "gfxPlatform.h"
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#include "nsClientRect.h"
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#ifdef MOZ_MEDIA
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#include "nsHTMLVideoElement.h"
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#endif
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#include "imgIRequest.h"
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#include "imgIContainer.h"
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#include "nsIImageLoadingContent.h"
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#include "nsCOMPtr.h"
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#include "nsListControlFrame.h"
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#include "ImageLayers.h"
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#include "mozilla/arm.h"
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#include "mozilla/dom/Element.h"
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#include "nsCanvasFrame.h"
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#include "gfxDrawable.h"
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#include "gfxUtils.h"
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#include "nsDataHashtable.h"
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#include "nsTextFrame.h"
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#include "nsFontFaceList.h"
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#include "nsSVGUtils.h"
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#include "nsSVGIntegrationUtils.h"
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#include "nsSVGForeignObjectFrame.h"
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#include "nsSVGOuterSVGFrame.h"
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#include "mozilla/Preferences.h"
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#ifdef MOZ_XUL
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#include "nsXULPopupManager.h"
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#endif
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using namespace mozilla::layers;
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using namespace mozilla::dom;
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namespace css = mozilla::css;
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#ifdef DEBUG
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// TODO: remove, see bug 598468.
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bool nsLayoutUtils::gPreventAssertInCompareTreePosition = false;
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#endif // DEBUG
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typedef gfxPattern::GraphicsFilter GraphicsFilter;
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typedef FrameMetrics::ViewID ViewID;
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static ViewID sScrollIdCounter = FrameMetrics::START_SCROLL_ID;
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typedef nsDataHashtable<nsUint64HashKey, nsIContent*> ContentMap;
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static ContentMap* sContentMap = NULL;
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static ContentMap& GetContentMap() {
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if (!sContentMap) {
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sContentMap = new ContentMap();
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#ifdef DEBUG
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nsresult rv =
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#endif
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sContentMap->Init();
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NS_ABORT_IF_FALSE(NS_SUCCEEDED(rv), "Could not initialize map.");
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}
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return *sContentMap;
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}
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PRBool
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nsLayoutUtils::Are3DTransformsEnabled()
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{
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static PRBool s3DTransformsEnabled;
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static PRBool s3DTransformPrefCached = PR_FALSE;
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if (!s3DTransformPrefCached) {
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s3DTransformPrefCached = PR_TRUE;
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mozilla::Preferences::AddBoolVarCache(&s3DTransformsEnabled,
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"layout.3d-transforms.enabled");
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}
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return s3DTransformsEnabled;
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}
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static void DestroyViewID(void* aObject, nsIAtom* aPropertyName,
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void* aPropertyValue, void* aData)
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{
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ViewID* id = static_cast<ViewID*>(aPropertyValue);
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GetContentMap().Remove(*id);
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delete id;
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}
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/**
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* A namespace class for static layout utilities.
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*/
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ViewID
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nsLayoutUtils::FindIDFor(nsIContent* aContent)
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{
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ViewID scrollId;
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void* scrollIdProperty = aContent->GetProperty(nsGkAtoms::RemoteId);
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if (scrollIdProperty) {
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scrollId = *static_cast<ViewID*>(scrollIdProperty);
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} else {
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scrollId = sScrollIdCounter++;
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aContent->SetProperty(nsGkAtoms::RemoteId, new ViewID(scrollId),
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DestroyViewID);
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GetContentMap().Put(scrollId, aContent);
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}
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return scrollId;
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}
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nsIContent*
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nsLayoutUtils::FindContentFor(ViewID aId)
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{
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NS_ABORT_IF_FALSE(aId != FrameMetrics::NULL_SCROLL_ID &&
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aId != FrameMetrics::ROOT_SCROLL_ID,
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"Cannot find a content element in map for null or root IDs.");
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nsIContent* content;
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bool exists = GetContentMap().Get(aId, &content);
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if (exists) {
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return content;
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} else {
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return nsnull;
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}
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}
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bool
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nsLayoutUtils::GetDisplayPort(nsIContent* aContent, nsRect *aResult)
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{
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void* property = aContent->GetProperty(nsGkAtoms::DisplayPort);
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if (!property) {
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return false;
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}
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if (aResult) {
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*aResult = *static_cast<nsRect*>(property);
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}
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return true;
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}
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nsIFrame*
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nsLayoutUtils::GetLastContinuationWithChild(nsIFrame* aFrame)
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{
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NS_PRECONDITION(aFrame, "NULL frame pointer");
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aFrame = aFrame->GetLastContinuation();
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while (!aFrame->GetFirstChild(nsnull) &&
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aFrame->GetPrevContinuation()) {
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aFrame = aFrame->GetPrevContinuation();
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}
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return aFrame;
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}
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/**
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* GetFirstChildFrame returns the first "real" child frame of a
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* given frame. It will descend down into pseudo-frames (unless the
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* pseudo-frame is the :before generated frame).
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* @param aFrame the frame
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* @param aFrame the frame's content node
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*/
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static nsIFrame*
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GetFirstChildFrame(nsIFrame* aFrame,
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nsIContent* aContent)
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{
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NS_PRECONDITION(aFrame, "NULL frame pointer");
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// Get the first child frame
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nsIFrame* childFrame = aFrame->GetFirstChild(nsnull);
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// If the child frame is a pseudo-frame, then return its first child.
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// Note that the frame we create for the generated content is also a
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// pseudo-frame and so don't drill down in that case
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if (childFrame &&
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childFrame->IsPseudoFrame(aContent) &&
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!childFrame->IsGeneratedContentFrame()) {
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return GetFirstChildFrame(childFrame, aContent);
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}
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return childFrame;
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}
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/**
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* GetLastChildFrame returns the last "real" child frame of a
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* given frame. It will descend down into pseudo-frames (unless the
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* pseudo-frame is the :after generated frame).
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* @param aFrame the frame
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* @param aFrame the frame's content node
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*/
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static nsIFrame*
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GetLastChildFrame(nsIFrame* aFrame,
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nsIContent* aContent)
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{
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NS_PRECONDITION(aFrame, "NULL frame pointer");
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// Get the last continuation frame that's a parent
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nsIFrame* lastParentContinuation = nsLayoutUtils::GetLastContinuationWithChild(aFrame);
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nsIFrame* lastChildFrame = lastParentContinuation->GetLastChild(nsnull);
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if (lastChildFrame) {
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// Get the frame's first continuation. This matters in case the frame has
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// been continued across multiple lines or split by BiDi resolution.
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lastChildFrame = lastChildFrame->GetFirstContinuation();
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// If the last child frame is a pseudo-frame, then return its last child.
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// Note that the frame we create for the generated content is also a
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// pseudo-frame and so don't drill down in that case
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if (lastChildFrame &&
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lastChildFrame->IsPseudoFrame(aContent) &&
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!lastChildFrame->IsGeneratedContentFrame()) {
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return GetLastChildFrame(lastChildFrame, aContent);
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}
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return lastChildFrame;
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}
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return nsnull;
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}
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//static
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nsIAtom*
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nsLayoutUtils::GetChildListNameFor(nsIFrame* aChildFrame)
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{
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nsIAtom* listName;
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if (aChildFrame->GetStateBits() & NS_FRAME_IS_OVERFLOW_CONTAINER) {
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nsIFrame* pif = aChildFrame->GetPrevInFlow();
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if (pif->GetParent() == aChildFrame->GetParent()) {
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listName = nsGkAtoms::excessOverflowContainersList;
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}
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else {
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listName = nsGkAtoms::overflowContainersList;
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}
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}
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// See if the frame is moved out of the flow
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else if (aChildFrame->GetStateBits() & NS_FRAME_OUT_OF_FLOW) {
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// Look at the style information to tell
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const nsStyleDisplay* disp = aChildFrame->GetStyleDisplay();
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if (NS_STYLE_POSITION_ABSOLUTE == disp->mPosition) {
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listName = nsGkAtoms::absoluteList;
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} else if (NS_STYLE_POSITION_FIXED == disp->mPosition) {
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if (nsLayoutUtils::IsReallyFixedPos(aChildFrame)) {
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listName = nsGkAtoms::fixedList;
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} else {
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listName = nsGkAtoms::absoluteList;
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}
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#ifdef MOZ_XUL
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} else if (NS_STYLE_DISPLAY_POPUP == disp->mDisplay) {
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// Out-of-flows that are DISPLAY_POPUP must be kids of the root popup set
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#ifdef DEBUG
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nsIFrame* parent = aChildFrame->GetParent();
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NS_ASSERTION(parent && parent->GetType() == nsGkAtoms::popupSetFrame,
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"Unexpected parent");
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#endif // DEBUG
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// XXX FIXME: Bug 350740
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// Return here, because the postcondition for this function actually
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// fails for this case, since the popups are not in a "real" frame list
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// in the popup set.
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return nsGkAtoms::popupList;
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#endif // MOZ_XUL
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} else {
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NS_ASSERTION(aChildFrame->GetStyleDisplay()->IsFloating(),
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"not a floated frame");
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listName = nsGkAtoms::floatList;
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}
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} else {
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nsIAtom* childType = aChildFrame->GetType();
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if (nsGkAtoms::menuPopupFrame == childType) {
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nsIFrame* parent = aChildFrame->GetParent();
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nsIFrame* firstPopup = (parent)
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? parent->GetFirstChild(nsGkAtoms::popupList)
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: nsnull;
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NS_ASSERTION(!firstPopup || !firstPopup->GetNextSibling(),
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"We assume popupList only has one child, but it has more.");
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listName = firstPopup == aChildFrame ? nsGkAtoms::popupList : nsnull;
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} else if (nsGkAtoms::tableColGroupFrame == childType) {
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listName = nsGkAtoms::colGroupList;
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} else if (nsGkAtoms::tableCaptionFrame == aChildFrame->GetType()) {
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listName = nsGkAtoms::captionList;
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} else {
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listName = nsnull;
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}
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}
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#ifdef NS_DEBUG
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// Verify that the frame is actually in that child list or in the
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// corresponding overflow list.
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nsIFrame* parent = aChildFrame->GetParent();
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PRBool found = parent->GetChildList(listName).ContainsFrame(aChildFrame);
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if (!found) {
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if (!(aChildFrame->GetStateBits() & NS_FRAME_OUT_OF_FLOW)) {
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found = parent->GetChildList(nsGkAtoms::overflowList)
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.ContainsFrame(aChildFrame);
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}
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else if (aChildFrame->GetStyleDisplay()->IsFloating()) {
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found = parent->GetChildList(nsGkAtoms::overflowOutOfFlowList)
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.ContainsFrame(aChildFrame);
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}
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// else it's positioned and should have been on the 'listName' child list.
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NS_POSTCONDITION(found, "not in child list");
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}
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#endif
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return listName;
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}
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// static
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nsIFrame*
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nsLayoutUtils::GetBeforeFrame(nsIFrame* aFrame)
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{
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NS_PRECONDITION(aFrame, "NULL frame pointer");
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NS_ASSERTION(!aFrame->GetPrevContinuation(),
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|
"aFrame must be first continuation");
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nsIFrame* firstFrame = GetFirstChildFrame(aFrame, aFrame->GetContent());
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if (firstFrame && IsGeneratedContentFor(nsnull, firstFrame,
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nsCSSPseudoElements::before)) {
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return firstFrame;
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|
}
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return nsnull;
|
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}
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|
|
// static
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nsIFrame*
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nsLayoutUtils::GetAfterFrame(nsIFrame* aFrame)
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|
{
|
|
NS_PRECONDITION(aFrame, "NULL frame pointer");
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|
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|
nsIFrame* lastFrame = GetLastChildFrame(aFrame, aFrame->GetContent());
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|
|
|
if (lastFrame && IsGeneratedContentFor(nsnull, lastFrame,
|
|
nsCSSPseudoElements::after)) {
|
|
return lastFrame;
|
|
}
|
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|
|
return nsnull;
|
|
}
|
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|
|
// static
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|
nsIFrame*
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nsLayoutUtils::GetClosestFrameOfType(nsIFrame* aFrame, nsIAtom* aFrameType)
|
|
{
|
|
for (nsIFrame* frame = aFrame; frame; frame = frame->GetParent()) {
|
|
if (frame->GetType() == aFrameType) {
|
|
return frame;
|
|
}
|
|
}
|
|
return nsnull;
|
|
}
|
|
|
|
// static
|
|
nsIFrame*
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|
nsLayoutUtils::GetStyleFrame(nsIFrame* aFrame)
|
|
{
|
|
if (aFrame->GetType() == nsGkAtoms::tableOuterFrame) {
|
|
nsIFrame* inner = aFrame->GetFirstChild(nsnull);
|
|
NS_ASSERTION(inner, "Outer table must have an inner");
|
|
return inner;
|
|
}
|
|
|
|
return aFrame;
|
|
}
|
|
|
|
nsIFrame*
|
|
nsLayoutUtils::GetFloatFromPlaceholder(nsIFrame* aFrame) {
|
|
NS_ASSERTION(nsGkAtoms::placeholderFrame == aFrame->GetType(),
|
|
"Must have a placeholder here");
|
|
if (aFrame->GetStateBits() & PLACEHOLDER_FOR_FLOAT) {
|
|
nsIFrame *outOfFlowFrame =
|
|
nsPlaceholderFrame::GetRealFrameForPlaceholder(aFrame);
|
|
NS_ASSERTION(outOfFlowFrame->GetStyleDisplay()->IsFloating(),
|
|
"How did that happen?");
|
|
return outOfFlowFrame;
|
|
}
|
|
|
|
return nsnull;
|
|
}
|
|
|
|
// static
|
|
PRBool
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|
nsLayoutUtils::IsGeneratedContentFor(nsIContent* aContent,
|
|
nsIFrame* aFrame,
|
|
nsIAtom* aPseudoElement)
|
|
{
|
|
NS_PRECONDITION(aFrame, "Must have a frame");
|
|
NS_PRECONDITION(aPseudoElement, "Must have a pseudo name");
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|
|
|
if (!aFrame->IsGeneratedContentFrame()) {
|
|
return PR_FALSE;
|
|
}
|
|
nsIFrame* parent = aFrame->GetParent();
|
|
NS_ASSERTION(parent, "Generated content can't be root frame");
|
|
if (parent->IsGeneratedContentFrame()) {
|
|
// Not the root of the generated content
|
|
return PR_FALSE;
|
|
}
|
|
|
|
if (aContent && parent->GetContent() != aContent) {
|
|
return PR_FALSE;
|
|
}
|
|
|
|
return (aFrame->GetContent()->Tag() == nsGkAtoms::mozgeneratedcontentbefore) ==
|
|
(aPseudoElement == nsCSSPseudoElements::before);
|
|
}
|
|
|
|
// static
|
|
nsIFrame*
|
|
nsLayoutUtils::GetCrossDocParentFrame(const nsIFrame* aFrame,
|
|
nsPoint* aExtraOffset)
|
|
{
|
|
nsIFrame* p = aFrame->GetParent();
|
|
if (p)
|
|
return p;
|
|
|
|
nsIView* v = aFrame->GetView();
|
|
if (!v)
|
|
return nsnull;
|
|
v = v->GetParent(); // anonymous inner view
|
|
if (!v)
|
|
return nsnull;
|
|
if (aExtraOffset) {
|
|
*aExtraOffset += v->GetPosition();
|
|
}
|
|
v = v->GetParent(); // subdocumentframe's view
|
|
if (!v)
|
|
return nsnull;
|
|
return static_cast<nsIFrame*>(v->GetClientData());
|
|
}
|
|
|
|
// static
|
|
PRBool
|
|
nsLayoutUtils::IsProperAncestorFrameCrossDoc(nsIFrame* aAncestorFrame, nsIFrame* aFrame,
|
|
nsIFrame* aCommonAncestor)
|
|
{
|
|
if (aFrame == aCommonAncestor)
|
|
return PR_FALSE;
|
|
|
|
nsIFrame* parentFrame = GetCrossDocParentFrame(aFrame);
|
|
|
|
while (parentFrame != aCommonAncestor) {
|
|
if (parentFrame == aAncestorFrame)
|
|
return PR_TRUE;
|
|
|
|
parentFrame = GetCrossDocParentFrame(parentFrame);
|
|
}
|
|
|
|
return PR_FALSE;
|
|
}
|
|
|
|
// static
|
|
PRBool
|
|
nsLayoutUtils::IsAncestorFrameCrossDoc(nsIFrame* aAncestorFrame, nsIFrame* aFrame,
|
|
nsIFrame* aCommonAncestor)
|
|
{
|
|
if (aFrame == aAncestorFrame)
|
|
return PR_TRUE;
|
|
return IsProperAncestorFrameCrossDoc(aAncestorFrame, aFrame, aCommonAncestor);
|
|
}
|
|
|
|
// static
|
|
PRBool
|
|
nsLayoutUtils::IsProperAncestorFrame(nsIFrame* aAncestorFrame, nsIFrame* aFrame,
|
|
nsIFrame* aCommonAncestor)
|
|
{
|
|
if (aFrame == aCommonAncestor) {
|
|
return PR_FALSE;
|
|
}
|
|
|
|
nsIFrame* parentFrame = aFrame->GetParent();
|
|
|
|
while (parentFrame != aCommonAncestor) {
|
|
if (parentFrame == aAncestorFrame) {
|
|
return PR_TRUE;
|
|
}
|
|
|
|
parentFrame = parentFrame->GetParent();
|
|
}
|
|
|
|
return PR_FALSE;
|
|
}
|
|
|
|
// static
|
|
PRInt32
|
|
nsLayoutUtils::DoCompareTreePosition(nsIContent* aContent1,
|
|
nsIContent* aContent2,
|
|
PRInt32 aIf1Ancestor,
|
|
PRInt32 aIf2Ancestor,
|
|
const nsIContent* aCommonAncestor)
|
|
{
|
|
NS_PRECONDITION(aContent1, "aContent1 must not be null");
|
|
NS_PRECONDITION(aContent2, "aContent2 must not be null");
|
|
|
|
nsAutoTArray<nsINode*, 32> content1Ancestors;
|
|
nsINode* c1;
|
|
for (c1 = aContent1; c1 && c1 != aCommonAncestor; c1 = c1->GetNodeParent()) {
|
|
content1Ancestors.AppendElement(c1);
|
|
}
|
|
if (!c1 && aCommonAncestor) {
|
|
// So, it turns out aCommonAncestor was not an ancestor of c1. Oops.
|
|
// Never mind. We can continue as if aCommonAncestor was null.
|
|
aCommonAncestor = nsnull;
|
|
}
|
|
|
|
nsAutoTArray<nsINode*, 32> content2Ancestors;
|
|
nsINode* c2;
|
|
for (c2 = aContent2; c2 && c2 != aCommonAncestor; c2 = c2->GetNodeParent()) {
|
|
content2Ancestors.AppendElement(c2);
|
|
}
|
|
if (!c2 && aCommonAncestor) {
|
|
// So, it turns out aCommonAncestor was not an ancestor of c2.
|
|
// We need to retry with no common ancestor hint.
|
|
return DoCompareTreePosition(aContent1, aContent2,
|
|
aIf1Ancestor, aIf2Ancestor, nsnull);
|
|
}
|
|
|
|
int last1 = content1Ancestors.Length() - 1;
|
|
int last2 = content2Ancestors.Length() - 1;
|
|
nsINode* content1Ancestor = nsnull;
|
|
nsINode* content2Ancestor = nsnull;
|
|
while (last1 >= 0 && last2 >= 0
|
|
&& ((content1Ancestor = content1Ancestors.ElementAt(last1)) ==
|
|
(content2Ancestor = content2Ancestors.ElementAt(last2)))) {
|
|
last1--;
|
|
last2--;
|
|
}
|
|
|
|
if (last1 < 0) {
|
|
if (last2 < 0) {
|
|
NS_ASSERTION(aContent1 == aContent2, "internal error?");
|
|
return 0;
|
|
}
|
|
// aContent1 is an ancestor of aContent2
|
|
return aIf1Ancestor;
|
|
}
|
|
|
|
if (last2 < 0) {
|
|
// aContent2 is an ancestor of aContent1
|
|
return aIf2Ancestor;
|
|
}
|
|
|
|
// content1Ancestor != content2Ancestor, so they must be siblings with the same parent
|
|
nsINode* parent = content1Ancestor->GetNodeParent();
|
|
#ifdef DEBUG
|
|
// TODO: remove the uglyness, see bug 598468.
|
|
NS_ASSERTION(gPreventAssertInCompareTreePosition || parent,
|
|
"no common ancestor at all???");
|
|
#endif // DEBUG
|
|
if (!parent) { // different documents??
|
|
return 0;
|
|
}
|
|
|
|
PRInt32 index1 = parent->IndexOf(content1Ancestor);
|
|
PRInt32 index2 = parent->IndexOf(content2Ancestor);
|
|
if (index1 < 0 || index2 < 0) {
|
|
// one of them must be anonymous; we can't determine the order
|
|
return 0;
|
|
}
|
|
|
|
return index1 - index2;
|
|
}
|
|
|
|
static nsIFrame* FillAncestors(nsIFrame* aFrame,
|
|
nsIFrame* aStopAtAncestor, nsFrameManager* aFrameManager,
|
|
nsTArray<nsIFrame*>* aAncestors)
|
|
{
|
|
while (aFrame && aFrame != aStopAtAncestor) {
|
|
aAncestors->AppendElement(aFrame);
|
|
aFrame = nsLayoutUtils::GetParentOrPlaceholderFor(aFrameManager, aFrame);
|
|
}
|
|
return aFrame;
|
|
}
|
|
|
|
// Return true if aFrame1 is after aFrame2
|
|
static PRBool IsFrameAfter(nsIFrame* aFrame1, nsIFrame* aFrame2)
|
|
{
|
|
nsIFrame* f = aFrame2;
|
|
do {
|
|
f = f->GetNextSibling();
|
|
if (f == aFrame1)
|
|
return PR_TRUE;
|
|
} while (f);
|
|
return PR_FALSE;
|
|
}
|
|
|
|
// static
|
|
PRInt32
|
|
nsLayoutUtils::DoCompareTreePosition(nsIFrame* aFrame1,
|
|
nsIFrame* aFrame2,
|
|
PRInt32 aIf1Ancestor,
|
|
PRInt32 aIf2Ancestor,
|
|
nsIFrame* aCommonAncestor)
|
|
{
|
|
NS_PRECONDITION(aFrame1, "aFrame1 must not be null");
|
|
NS_PRECONDITION(aFrame2, "aFrame2 must not be null");
|
|
|
|
nsPresContext* presContext = aFrame1->PresContext();
|
|
if (presContext != aFrame2->PresContext()) {
|
|
NS_ERROR("no common ancestor at all, different documents");
|
|
return 0;
|
|
}
|
|
nsFrameManager* frameManager = presContext->PresShell()->FrameManager();
|
|
|
|
nsAutoTArray<nsIFrame*,20> frame1Ancestors;
|
|
if (!FillAncestors(aFrame1, aCommonAncestor, frameManager, &frame1Ancestors)) {
|
|
// We reached the root of the frame tree ... if aCommonAncestor was set,
|
|
// it is wrong
|
|
aCommonAncestor = nsnull;
|
|
}
|
|
|
|
nsAutoTArray<nsIFrame*,20> frame2Ancestors;
|
|
if (!FillAncestors(aFrame2, aCommonAncestor, frameManager, &frame2Ancestors) &&
|
|
aCommonAncestor) {
|
|
// We reached the root of the frame tree ... aCommonAncestor was wrong.
|
|
// Try again with no hint.
|
|
return DoCompareTreePosition(aFrame1, aFrame2,
|
|
aIf1Ancestor, aIf2Ancestor, nsnull);
|
|
}
|
|
|
|
PRInt32 last1 = PRInt32(frame1Ancestors.Length()) - 1;
|
|
PRInt32 last2 = PRInt32(frame2Ancestors.Length()) - 1;
|
|
while (last1 >= 0 && last2 >= 0 &&
|
|
frame1Ancestors[last1] == frame2Ancestors[last2]) {
|
|
last1--;
|
|
last2--;
|
|
}
|
|
|
|
if (last1 < 0) {
|
|
if (last2 < 0) {
|
|
NS_ASSERTION(aFrame1 == aFrame2, "internal error?");
|
|
return 0;
|
|
}
|
|
// aFrame1 is an ancestor of aFrame2
|
|
return aIf1Ancestor;
|
|
}
|
|
|
|
if (last2 < 0) {
|
|
// aFrame2 is an ancestor of aFrame1
|
|
return aIf2Ancestor;
|
|
}
|
|
|
|
nsIFrame* ancestor1 = frame1Ancestors[last1];
|
|
nsIFrame* ancestor2 = frame2Ancestors[last2];
|
|
// Now we should be able to walk sibling chains to find which one is first
|
|
if (IsFrameAfter(ancestor2, ancestor1))
|
|
return -1;
|
|
if (IsFrameAfter(ancestor1, ancestor2))
|
|
return 1;
|
|
NS_WARNING("Frames were in different child lists???");
|
|
return 0;
|
|
}
|
|
|
|
// static
|
|
nsIFrame* nsLayoutUtils::GetLastSibling(nsIFrame* aFrame) {
|
|
if (!aFrame) {
|
|
return nsnull;
|
|
}
|
|
|
|
nsIFrame* next;
|
|
while ((next = aFrame->GetNextSibling()) != nsnull) {
|
|
aFrame = next;
|
|
}
|
|
return aFrame;
|
|
}
|
|
|
|
// static
|
|
nsIView*
|
|
nsLayoutUtils::FindSiblingViewFor(nsIView* aParentView, nsIFrame* aFrame) {
|
|
nsIFrame* parentViewFrame = static_cast<nsIFrame*>(aParentView->GetClientData());
|
|
nsIContent* parentViewContent = parentViewFrame ? parentViewFrame->GetContent() : nsnull;
|
|
for (nsIView* insertBefore = aParentView->GetFirstChild(); insertBefore;
|
|
insertBefore = insertBefore->GetNextSibling()) {
|
|
nsIFrame* f = static_cast<nsIFrame*>(insertBefore->GetClientData());
|
|
if (!f) {
|
|
// this view could be some anonymous view attached to a meaningful parent
|
|
for (nsIView* searchView = insertBefore->GetParent(); searchView;
|
|
searchView = searchView->GetParent()) {
|
|
f = static_cast<nsIFrame*>(searchView->GetClientData());
|
|
if (f) {
|
|
break;
|
|
}
|
|
}
|
|
NS_ASSERTION(f, "Can't find a frame anywhere!");
|
|
}
|
|
if (!f || !aFrame->GetContent() || !f->GetContent() ||
|
|
CompareTreePosition(aFrame->GetContent(), f->GetContent(), parentViewContent) > 0) {
|
|
// aFrame's content is after f's content (or we just don't know),
|
|
// so put our view before f's view
|
|
return insertBefore;
|
|
}
|
|
}
|
|
return nsnull;
|
|
}
|
|
|
|
//static
|
|
nsIScrollableFrame*
|
|
nsLayoutUtils::GetScrollableFrameFor(nsIFrame *aScrolledFrame)
|
|
{
|
|
nsIFrame *frame = aScrolledFrame->GetParent();
|
|
if (!frame) {
|
|
return nsnull;
|
|
}
|
|
nsIScrollableFrame *sf = do_QueryFrame(frame);
|
|
return sf;
|
|
}
|
|
|
|
nsIFrame*
|
|
nsLayoutUtils::GetActiveScrolledRootFor(nsIFrame* aFrame,
|
|
nsIFrame* aStopAtAncestor)
|
|
{
|
|
nsIFrame* f = aFrame;
|
|
while (f != aStopAtAncestor) {
|
|
if (IsPopup(f))
|
|
break;
|
|
nsIFrame* parent = GetCrossDocParentFrame(f);
|
|
if (!parent)
|
|
break;
|
|
nsIScrollableFrame* sf = do_QueryFrame(parent);
|
|
if (sf && sf->IsScrollingActive() && sf->GetScrolledFrame() == f)
|
|
break;
|
|
f = parent;
|
|
}
|
|
return f;
|
|
}
|
|
|
|
nsIFrame*
|
|
nsLayoutUtils::GetActiveScrolledRootFor(nsDisplayItem* aItem,
|
|
nsDisplayListBuilder* aBuilder,
|
|
PRBool* aShouldFixToViewport)
|
|
{
|
|
nsIFrame* f = aItem->GetUnderlyingFrame();
|
|
if (aShouldFixToViewport) {
|
|
*aShouldFixToViewport = PR_FALSE;
|
|
}
|
|
if (!f) {
|
|
return nsnull;
|
|
}
|
|
if (aItem->ShouldFixToViewport(aBuilder)) {
|
|
if (aShouldFixToViewport) {
|
|
*aShouldFixToViewport = PR_TRUE;
|
|
}
|
|
// Make its active scrolled root be the active scrolled root of
|
|
// the enclosing viewport, since it shouldn't be scrolled by scrolled
|
|
// frames in its document. InvalidateFixedBackgroundFramesFromList in
|
|
// nsGfxScrollFrame will not repaint this item when scrolling occurs.
|
|
nsIFrame* viewportFrame =
|
|
nsLayoutUtils::GetClosestFrameOfType(f, nsGkAtoms::viewportFrame);
|
|
NS_ASSERTION(viewportFrame, "no viewport???");
|
|
return nsLayoutUtils::GetActiveScrolledRootFor(viewportFrame, aBuilder->ReferenceFrame());
|
|
} else {
|
|
return nsLayoutUtils::GetActiveScrolledRootFor(f, aBuilder->ReferenceFrame());
|
|
}
|
|
}
|
|
|
|
PRBool
|
|
nsLayoutUtils::ScrolledByViewportScrolling(nsIFrame* aActiveScrolledRoot,
|
|
nsDisplayListBuilder* aBuilder)
|
|
{
|
|
nsIFrame* rootScrollFrame =
|
|
aBuilder->ReferenceFrame()->PresContext()->GetPresShell()->GetRootScrollFrame();
|
|
return nsLayoutUtils::IsAncestorFrameCrossDoc(rootScrollFrame, aActiveScrolledRoot);
|
|
}
|
|
|
|
// static
|
|
nsIScrollableFrame*
|
|
nsLayoutUtils::GetNearestScrollableFrameForDirection(nsIFrame* aFrame,
|
|
Direction aDirection)
|
|
{
|
|
NS_ASSERTION(aFrame, "GetNearestScrollableFrameForDirection expects a non-null frame");
|
|
for (nsIFrame* f = aFrame; f; f = nsLayoutUtils::GetCrossDocParentFrame(f)) {
|
|
nsIScrollableFrame* scrollableFrame = do_QueryFrame(f);
|
|
if (scrollableFrame) {
|
|
nsPresContext::ScrollbarStyles ss = scrollableFrame->GetScrollbarStyles();
|
|
PRUint32 scrollbarVisibility = scrollableFrame->GetScrollbarVisibility();
|
|
nsRect scrollRange = scrollableFrame->GetScrollRange();
|
|
// Require visible scrollbars or something to scroll to in
|
|
// the given direction.
|
|
if (aDirection == eVertical ?
|
|
(ss.mVertical != NS_STYLE_OVERFLOW_HIDDEN &&
|
|
((scrollbarVisibility & nsIScrollableFrame::VERTICAL) ||
|
|
scrollRange.height > 0)) :
|
|
(ss.mHorizontal != NS_STYLE_OVERFLOW_HIDDEN &&
|
|
((scrollbarVisibility & nsIScrollableFrame::HORIZONTAL) ||
|
|
scrollRange.width > 0)))
|
|
return scrollableFrame;
|
|
}
|
|
}
|
|
return nsnull;
|
|
}
|
|
|
|
// static
|
|
nsIScrollableFrame*
|
|
nsLayoutUtils::GetNearestScrollableFrame(nsIFrame* aFrame)
|
|
{
|
|
NS_ASSERTION(aFrame, "GetNearestScrollableFrame expects a non-null frame");
|
|
for (nsIFrame* f = aFrame; f; f = nsLayoutUtils::GetCrossDocParentFrame(f)) {
|
|
nsIScrollableFrame* scrollableFrame = do_QueryFrame(f);
|
|
if (scrollableFrame) {
|
|
nsPresContext::ScrollbarStyles ss = scrollableFrame->GetScrollbarStyles();
|
|
if (ss.mVertical != NS_STYLE_OVERFLOW_HIDDEN ||
|
|
ss.mHorizontal != NS_STYLE_OVERFLOW_HIDDEN)
|
|
return scrollableFrame;
|
|
}
|
|
}
|
|
return nsnull;
|
|
}
|
|
|
|
//static
|
|
PRBool
|
|
nsLayoutUtils::HasPseudoStyle(nsIContent* aContent,
|
|
nsStyleContext* aStyleContext,
|
|
nsCSSPseudoElements::Type aPseudoElement,
|
|
nsPresContext* aPresContext)
|
|
{
|
|
NS_PRECONDITION(aPresContext, "Must have a prescontext");
|
|
|
|
nsRefPtr<nsStyleContext> pseudoContext;
|
|
if (aContent) {
|
|
pseudoContext = aPresContext->StyleSet()->
|
|
ProbePseudoElementStyle(aContent->AsElement(), aPseudoElement,
|
|
aStyleContext);
|
|
}
|
|
return pseudoContext != nsnull;
|
|
}
|
|
|
|
nsPoint
|
|
nsLayoutUtils::GetDOMEventCoordinatesRelativeTo(nsIDOMEvent* aDOMEvent, nsIFrame* aFrame)
|
|
{
|
|
nsCOMPtr<nsIPrivateDOMEvent> privateEvent(do_QueryInterface(aDOMEvent));
|
|
NS_ASSERTION(privateEvent, "bad implementation");
|
|
if (!privateEvent)
|
|
return nsPoint(NS_UNCONSTRAINEDSIZE, NS_UNCONSTRAINEDSIZE);
|
|
nsEvent *event = privateEvent->GetInternalNSEvent();
|
|
if (!event)
|
|
return nsPoint(NS_UNCONSTRAINEDSIZE, NS_UNCONSTRAINEDSIZE);
|
|
return GetEventCoordinatesRelativeTo(event, aFrame);
|
|
}
|
|
|
|
nsPoint
|
|
nsLayoutUtils::GetEventCoordinatesRelativeTo(const nsEvent* aEvent, nsIFrame* aFrame)
|
|
{
|
|
if (!aEvent || (aEvent->eventStructType != NS_MOUSE_EVENT &&
|
|
aEvent->eventStructType != NS_MOUSE_SCROLL_EVENT &&
|
|
aEvent->eventStructType != NS_DRAG_EVENT &&
|
|
aEvent->eventStructType != NS_SIMPLE_GESTURE_EVENT &&
|
|
aEvent->eventStructType != NS_GESTURENOTIFY_EVENT &&
|
|
aEvent->eventStructType != NS_MOZTOUCH_EVENT &&
|
|
aEvent->eventStructType != NS_QUERY_CONTENT_EVENT))
|
|
return nsPoint(NS_UNCONSTRAINEDSIZE, NS_UNCONSTRAINEDSIZE);
|
|
|
|
const nsGUIEvent* GUIEvent = static_cast<const nsGUIEvent*>(aEvent);
|
|
if (!GUIEvent->widget)
|
|
return nsPoint(NS_UNCONSTRAINEDSIZE, NS_UNCONSTRAINEDSIZE);
|
|
|
|
/* If we walk up the frame tree and discover that any of the frames are
|
|
* transformed, we need to do extra work to convert from the global
|
|
* space to the local space.
|
|
*/
|
|
nsIFrame* rootFrame = aFrame;
|
|
PRBool transformFound = PR_FALSE;
|
|
|
|
for (nsIFrame* f = aFrame; f; f = GetCrossDocParentFrame(f)) {
|
|
if (f->IsTransformed())
|
|
transformFound = PR_TRUE;
|
|
|
|
rootFrame = f;
|
|
}
|
|
|
|
nsIView* rootView = rootFrame->GetView();
|
|
if (!rootView)
|
|
return nsPoint(NS_UNCONSTRAINEDSIZE, NS_UNCONSTRAINEDSIZE);
|
|
|
|
nsPoint widgetToView = TranslateWidgetToView(rootFrame->PresContext(),
|
|
GUIEvent->widget, GUIEvent->refPoint,
|
|
rootView);
|
|
|
|
if (widgetToView == nsPoint(NS_UNCONSTRAINEDSIZE, NS_UNCONSTRAINEDSIZE))
|
|
return nsPoint(NS_UNCONSTRAINEDSIZE, NS_UNCONSTRAINEDSIZE);
|
|
|
|
// Convert from root document app units to app units of the document aFrame
|
|
// is in.
|
|
PRInt32 rootAPD = rootFrame->PresContext()->AppUnitsPerDevPixel();
|
|
PRInt32 localAPD = aFrame->PresContext()->AppUnitsPerDevPixel();
|
|
widgetToView = widgetToView.ConvertAppUnits(rootAPD, localAPD);
|
|
|
|
/* If we encountered a transform, we can't do simple arithmetic to figure
|
|
* out how to convert back to aFrame's coordinates and must use the CTM.
|
|
*/
|
|
if (transformFound)
|
|
return InvertTransformsToRoot(aFrame, widgetToView);
|
|
|
|
/* Otherwise, all coordinate systems are translations of one another,
|
|
* so we can just subtract out the different.
|
|
*/
|
|
return widgetToView - aFrame->GetOffsetToCrossDoc(rootFrame);
|
|
}
|
|
|
|
nsIFrame*
|
|
nsLayoutUtils::GetPopupFrameForEventCoordinates(nsPresContext* aPresContext,
|
|
const nsEvent* aEvent)
|
|
{
|
|
#ifdef MOZ_XUL
|
|
nsXULPopupManager* pm = nsXULPopupManager::GetInstance();
|
|
if (!pm) {
|
|
return nsnull;
|
|
}
|
|
nsTArray<nsIFrame*> popups = pm->GetVisiblePopups();
|
|
PRUint32 i;
|
|
// Search from top to bottom
|
|
for (i = 0; i < popups.Length(); i++) {
|
|
nsIFrame* popup = popups[i];
|
|
if (popup->PresContext()->GetRootPresContext() == aPresContext &&
|
|
popup->GetScrollableOverflowRect().Contains(
|
|
GetEventCoordinatesRelativeTo(aEvent, popup))) {
|
|
return popup;
|
|
}
|
|
}
|
|
#endif
|
|
return nsnull;
|
|
}
|
|
|
|
gfx3DMatrix
|
|
nsLayoutUtils::ChangeMatrixBasis(const gfxPoint3D &aOrigin,
|
|
const gfx3DMatrix &aMatrix)
|
|
{
|
|
/* These are translation matrices from world-to-origin of relative frame and
|
|
* vice-versa.
|
|
*/
|
|
gfx3DMatrix worldToOrigin = gfx3DMatrix::Translation(-aOrigin);
|
|
gfx3DMatrix originToWorld = gfx3DMatrix::Translation(aOrigin);
|
|
|
|
/* Multiply all three to get the transform! */
|
|
return worldToOrigin * aMatrix * originToWorld;
|
|
}
|
|
|
|
/**
|
|
* Given a gfxFloat, constrains its value to be between nscoord_MIN and nscoord_MAX.
|
|
*
|
|
* @param aVal The value to constrain (in/out)
|
|
*/
|
|
static void ConstrainToCoordValues(gfxFloat &aVal)
|
|
{
|
|
if (aVal <= nscoord_MIN)
|
|
aVal = nscoord_MIN;
|
|
else if (aVal >= nscoord_MAX)
|
|
aVal = nscoord_MAX;
|
|
}
|
|
|
|
nsRect
|
|
nsLayoutUtils::RoundGfxRectToAppRect(const gfxRect &aRect, float aFactor)
|
|
{
|
|
/* Get a new gfxRect whose units are app units by scaling by the specified factor. */
|
|
gfxRect scaledRect = aRect;
|
|
scaledRect.ScaleRoundOut(aFactor);
|
|
|
|
/* We now need to constrain our results to the max and min values for coords. */
|
|
ConstrainToCoordValues(scaledRect.x);
|
|
ConstrainToCoordValues(scaledRect.y);
|
|
ConstrainToCoordValues(scaledRect.width);
|
|
ConstrainToCoordValues(scaledRect.height);
|
|
|
|
/* Now typecast everything back. This is guaranteed to be safe. */
|
|
return nsRect(nscoord(scaledRect.X()), nscoord(scaledRect.Y()),
|
|
nscoord(scaledRect.Width()), nscoord(scaledRect.Height()));
|
|
}
|
|
|
|
|
|
nsRegion
|
|
nsLayoutUtils::RoundedRectIntersectRect(const nsRect& aRoundedRect,
|
|
const nscoord aRadii[8],
|
|
const nsRect& aContainedRect)
|
|
{
|
|
// rectFullHeight and rectFullWidth together will approximately contain
|
|
// the total area of the frame minus the rounded corners.
|
|
nsRect rectFullHeight = aRoundedRect;
|
|
nscoord xDiff = NS_MAX(aRadii[NS_CORNER_TOP_LEFT_X], aRadii[NS_CORNER_BOTTOM_LEFT_X]);
|
|
rectFullHeight.x += xDiff;
|
|
rectFullHeight.width -= NS_MAX(aRadii[NS_CORNER_TOP_RIGHT_X],
|
|
aRadii[NS_CORNER_BOTTOM_RIGHT_X]) + xDiff;
|
|
nsRect r1;
|
|
r1.IntersectRect(rectFullHeight, aContainedRect);
|
|
|
|
nsRect rectFullWidth = aRoundedRect;
|
|
nscoord yDiff = NS_MAX(aRadii[NS_CORNER_TOP_LEFT_Y], aRadii[NS_CORNER_TOP_RIGHT_Y]);
|
|
rectFullWidth.y += yDiff;
|
|
rectFullWidth.height -= NS_MAX(aRadii[NS_CORNER_BOTTOM_LEFT_Y],
|
|
aRadii[NS_CORNER_BOTTOM_RIGHT_Y]) + yDiff;
|
|
nsRect r2;
|
|
r2.IntersectRect(rectFullWidth, aContainedRect);
|
|
|
|
nsRegion result;
|
|
result.Or(r1, r2);
|
|
return result;
|
|
}
|
|
|
|
nsRect
|
|
nsLayoutUtils::MatrixTransformRectOut(const nsRect &aBounds,
|
|
const gfx3DMatrix &aMatrix, float aFactor)
|
|
{
|
|
nsRect outside = aBounds;
|
|
outside.ScaleRoundOut(1/aFactor);
|
|
gfxRect image = aMatrix.TransformBounds(gfxRect(outside.x,
|
|
outside.y,
|
|
outside.width,
|
|
outside.height));
|
|
return RoundGfxRectToAppRect(image, aFactor);
|
|
}
|
|
|
|
nsRect
|
|
nsLayoutUtils::MatrixTransformRect(const nsRect &aBounds,
|
|
const gfx3DMatrix &aMatrix, float aFactor)
|
|
{
|
|
gfxRect image = aMatrix.TransformBounds(gfxRect(NSAppUnitsToDoublePixels(aBounds.x, aFactor),
|
|
NSAppUnitsToDoublePixels(aBounds.y, aFactor),
|
|
NSAppUnitsToDoublePixels(aBounds.width, aFactor),
|
|
NSAppUnitsToDoublePixels(aBounds.height, aFactor)));
|
|
|
|
return RoundGfxRectToAppRect(image, aFactor);
|
|
}
|
|
|
|
nsPoint
|
|
nsLayoutUtils::MatrixTransformPoint(const nsPoint &aPoint,
|
|
const gfx3DMatrix &aMatrix, float aFactor)
|
|
{
|
|
gfxPoint image = aMatrix.Transform(gfxPoint(NSAppUnitsToFloatPixels(aPoint.x, aFactor),
|
|
NSAppUnitsToFloatPixels(aPoint.y, aFactor)));
|
|
return nsPoint(NSFloatPixelsToAppUnits(float(image.x), aFactor),
|
|
NSFloatPixelsToAppUnits(float(image.y), aFactor));
|
|
}
|
|
|
|
static gfxPoint
|
|
InvertTransformsToAncestor(nsIFrame *aFrame,
|
|
const gfxPoint &aPoint,
|
|
nsIFrame *aStopAtAncestor = nsnull)
|
|
{
|
|
NS_PRECONDITION(aFrame, "Why are you inverting transforms when there is no frame?");
|
|
|
|
/* To invert everything to the root, we'll get the CTM, invert it, and use it to transform
|
|
* the point.
|
|
*/
|
|
nsIFrame *parent = nsnull;
|
|
gfx3DMatrix ctm = aFrame->GetTransformMatrix(&parent);
|
|
gfxPoint result = aPoint;
|
|
|
|
if (parent && parent != aStopAtAncestor) {
|
|
result = InvertTransformsToAncestor(parent, aPoint, aStopAtAncestor);
|
|
}
|
|
|
|
result = ctm.Inverse().ProjectPoint(result);
|
|
return result;
|
|
}
|
|
|
|
static gfxRect
|
|
InvertGfxRectToAncestor(nsIFrame *aFrame,
|
|
const gfxRect &aRect,
|
|
nsIFrame *aStopAtAncestor = nsnull)
|
|
{
|
|
NS_PRECONDITION(aFrame, "Why are you inverting transforms when there is no frame?");
|
|
|
|
/* To invert everything to the root, we'll get the CTM, invert it, and use it to transform
|
|
* the point.
|
|
*/
|
|
nsIFrame *parent = nsnull;
|
|
gfx3DMatrix ctm = aFrame->GetTransformMatrix(&parent);
|
|
gfxRect result = aRect;
|
|
|
|
if (parent && parent != aStopAtAncestor) {
|
|
result = InvertGfxRectToAncestor(parent, aRect, aStopAtAncestor);
|
|
}
|
|
|
|
result = ctm.Inverse().ProjectRectBounds(result);
|
|
return result;
|
|
}
|
|
|
|
nsPoint
|
|
nsLayoutUtils::InvertTransformsToRoot(nsIFrame *aFrame,
|
|
const nsPoint &aPoint)
|
|
{
|
|
float factor = aFrame->PresContext()->AppUnitsPerDevPixel();
|
|
gfxPoint result(NSAppUnitsToFloatPixels(aPoint.x, factor),
|
|
NSAppUnitsToFloatPixels(aPoint.y, factor));
|
|
|
|
result = InvertTransformsToAncestor(aFrame, result);
|
|
|
|
return nsPoint(NSFloatPixelsToAppUnits(float(result.x), factor),
|
|
NSFloatPixelsToAppUnits(float(result.y), factor));
|
|
}
|
|
|
|
nsRect
|
|
nsLayoutUtils::TransformRectToBoundsInAncestor(nsIFrame* aFrame,
|
|
const nsRect &aRect,
|
|
nsIFrame* aStopAtAncestor)
|
|
{
|
|
float factor = aFrame->PresContext()->AppUnitsPerDevPixel();
|
|
gfxRect result(NSAppUnitsToFloatPixels(aRect.x, factor),
|
|
NSAppUnitsToFloatPixels(aRect.y, factor),
|
|
NSAppUnitsToFloatPixels(aRect.width, factor),
|
|
NSAppUnitsToFloatPixels(aRect.height, factor));
|
|
|
|
result = InvertGfxRectToAncestor(aFrame, result, aStopAtAncestor);
|
|
|
|
return nsRect(NSFloatPixelsToAppUnits(float(result.x), factor),
|
|
NSFloatPixelsToAppUnits(float(result.y), factor),
|
|
NSFloatPixelsToAppUnits(float(result.width), factor),
|
|
NSFloatPixelsToAppUnits(float(result.height), factor));
|
|
}
|
|
|
|
static nsIntPoint GetWidgetOffset(nsIWidget* aWidget, nsIWidget*& aRootWidget) {
|
|
nsIntPoint offset(0, 0);
|
|
nsIWidget* parent = aWidget->GetParent();
|
|
while (parent) {
|
|
nsIntRect bounds;
|
|
aWidget->GetBounds(bounds);
|
|
offset += bounds.TopLeft();
|
|
aWidget = parent;
|
|
parent = aWidget->GetParent();
|
|
}
|
|
aRootWidget = aWidget;
|
|
return offset;
|
|
}
|
|
|
|
nsPoint
|
|
nsLayoutUtils::TranslateWidgetToView(nsPresContext* aPresContext,
|
|
nsIWidget* aWidget, nsIntPoint aPt,
|
|
nsIView* aView)
|
|
{
|
|
nsPoint viewOffset;
|
|
nsIWidget* viewWidget = aView->GetNearestWidget(&viewOffset);
|
|
if (!viewWidget) {
|
|
return nsPoint(NS_UNCONSTRAINEDSIZE, NS_UNCONSTRAINEDSIZE);
|
|
}
|
|
|
|
nsIWidget* fromRoot;
|
|
nsIntPoint fromOffset = GetWidgetOffset(aWidget, fromRoot);
|
|
nsIWidget* toRoot;
|
|
nsIntPoint toOffset = GetWidgetOffset(viewWidget, toRoot);
|
|
|
|
nsIntPoint widgetPoint;
|
|
if (fromRoot == toRoot) {
|
|
widgetPoint = aPt + fromOffset - toOffset;
|
|
} else {
|
|
nsIntPoint screenPoint = aWidget->WidgetToScreenOffset();
|
|
widgetPoint = aPt + screenPoint - viewWidget->WidgetToScreenOffset();
|
|
}
|
|
|
|
nsPoint widgetAppUnits(aPresContext->DevPixelsToAppUnits(widgetPoint.x),
|
|
aPresContext->DevPixelsToAppUnits(widgetPoint.y));
|
|
return widgetAppUnits - viewOffset;
|
|
}
|
|
|
|
// Combine aNewBreakType with aOrigBreakType, but limit the break types
|
|
// to NS_STYLE_CLEAR_LEFT, RIGHT, LEFT_AND_RIGHT.
|
|
PRUint8
|
|
nsLayoutUtils::CombineBreakType(PRUint8 aOrigBreakType,
|
|
PRUint8 aNewBreakType)
|
|
{
|
|
PRUint8 breakType = aOrigBreakType;
|
|
switch(breakType) {
|
|
case NS_STYLE_CLEAR_LEFT:
|
|
if ((NS_STYLE_CLEAR_RIGHT == aNewBreakType) ||
|
|
(NS_STYLE_CLEAR_LEFT_AND_RIGHT == aNewBreakType)) {
|
|
breakType = NS_STYLE_CLEAR_LEFT_AND_RIGHT;
|
|
}
|
|
break;
|
|
case NS_STYLE_CLEAR_RIGHT:
|
|
if ((NS_STYLE_CLEAR_LEFT == aNewBreakType) ||
|
|
(NS_STYLE_CLEAR_LEFT_AND_RIGHT == aNewBreakType)) {
|
|
breakType = NS_STYLE_CLEAR_LEFT_AND_RIGHT;
|
|
}
|
|
break;
|
|
case NS_STYLE_CLEAR_NONE:
|
|
if ((NS_STYLE_CLEAR_LEFT == aNewBreakType) ||
|
|
(NS_STYLE_CLEAR_RIGHT == aNewBreakType) ||
|
|
(NS_STYLE_CLEAR_LEFT_AND_RIGHT == aNewBreakType)) {
|
|
breakType = aNewBreakType;
|
|
}
|
|
}
|
|
return breakType;
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
#include <stdio.h>
|
|
|
|
static PRBool gDumpPaintList = getenv("MOZ_DUMP_PAINT_LIST") != 0;
|
|
static PRBool gDumpEventList = PR_FALSE;
|
|
#endif
|
|
|
|
nsresult
|
|
nsLayoutUtils::GetRemoteContentIds(nsIFrame* aFrame,
|
|
const nsRect& aTarget,
|
|
nsTArray<ViewID> &aOutIDs,
|
|
PRBool aIgnoreRootScrollFrame)
|
|
{
|
|
nsDisplayListBuilder builder(aFrame, nsDisplayListBuilder::EVENT_DELIVERY,
|
|
PR_FALSE);
|
|
nsDisplayList list;
|
|
|
|
if (aIgnoreRootScrollFrame) {
|
|
nsIFrame* rootScrollFrame =
|
|
aFrame->PresContext()->PresShell()->GetRootScrollFrame();
|
|
if (rootScrollFrame) {
|
|
builder.SetIgnoreScrollFrame(rootScrollFrame);
|
|
}
|
|
}
|
|
|
|
builder.EnterPresShell(aFrame, aTarget);
|
|
|
|
nsresult rv =
|
|
aFrame->BuildDisplayListForStackingContext(&builder, aTarget, &list);
|
|
|
|
builder.LeavePresShell(aFrame, aTarget);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
nsTArray<nsIFrame*> outFrames;
|
|
nsDisplayItem::HitTestState hitTestState(&aOutIDs);
|
|
list.HitTest(&builder, aTarget, &hitTestState, &outFrames);
|
|
list.DeleteAll();
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
nsIFrame*
|
|
nsLayoutUtils::GetFrameForPoint(nsIFrame* aFrame, nsPoint aPt,
|
|
PRBool aShouldIgnoreSuppression,
|
|
PRBool aIgnoreRootScrollFrame)
|
|
{
|
|
nsresult rv;
|
|
nsTArray<nsIFrame*> outFrames;
|
|
rv = GetFramesForArea(aFrame, nsRect(aPt, nsSize(1, 1)), outFrames,
|
|
aShouldIgnoreSuppression, aIgnoreRootScrollFrame);
|
|
NS_ENSURE_SUCCESS(rv, nsnull);
|
|
return outFrames.Length() ? outFrames.ElementAt(0) : nsnull;
|
|
}
|
|
|
|
nsresult
|
|
nsLayoutUtils::GetFramesForArea(nsIFrame* aFrame, const nsRect& aRect,
|
|
nsTArray<nsIFrame*> &aOutFrames,
|
|
PRBool aShouldIgnoreSuppression,
|
|
PRBool aIgnoreRootScrollFrame)
|
|
{
|
|
nsDisplayListBuilder builder(aFrame, nsDisplayListBuilder::EVENT_DELIVERY,
|
|
PR_FALSE);
|
|
nsDisplayList list;
|
|
nsRect target(aRect);
|
|
|
|
if (aShouldIgnoreSuppression) {
|
|
builder.IgnorePaintSuppression();
|
|
}
|
|
|
|
if (aIgnoreRootScrollFrame) {
|
|
nsIFrame* rootScrollFrame =
|
|
aFrame->PresContext()->PresShell()->GetRootScrollFrame();
|
|
if (rootScrollFrame) {
|
|
builder.SetIgnoreScrollFrame(rootScrollFrame);
|
|
}
|
|
}
|
|
|
|
builder.EnterPresShell(aFrame, target);
|
|
|
|
nsresult rv =
|
|
aFrame->BuildDisplayListForStackingContext(&builder, target, &list);
|
|
|
|
builder.LeavePresShell(aFrame, target);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
#ifdef DEBUG
|
|
if (gDumpEventList) {
|
|
fprintf(stdout, "Event handling --- (%d,%d):\n", aRect.x, aRect.y);
|
|
nsFrame::PrintDisplayList(&builder, list);
|
|
}
|
|
#endif
|
|
|
|
nsDisplayItem::HitTestState hitTestState;
|
|
list.HitTest(&builder, target, &hitTestState, &aOutFrames);
|
|
list.DeleteAll();
|
|
return NS_OK;
|
|
}
|
|
|
|
/**
|
|
* Remove all leaf display items that are not for descendants of
|
|
* aBuilder->GetReferenceFrame() from aList, and move all nsDisplayClip
|
|
* wrappers to their correct locations.
|
|
* @param aExtraPage the page we constructed aList for
|
|
* @param aY the Y-coordinate where aPage would be positioned relative
|
|
* to the main page (aBuilder->GetReferenceFrame()), considering only
|
|
* the content and ignoring page margins and dead space
|
|
* @param aList the list that is modified in-place
|
|
*/
|
|
static void
|
|
PruneDisplayListForExtraPage(nsDisplayListBuilder* aBuilder,
|
|
nsIFrame* aExtraPage, nscoord aY, nsDisplayList* aList)
|
|
{
|
|
nsDisplayList newList;
|
|
// The page which we're really constructing a display list for
|
|
nsIFrame* mainPage = aBuilder->ReferenceFrame();
|
|
|
|
while (PR_TRUE) {
|
|
nsDisplayItem* i = aList->RemoveBottom();
|
|
if (!i)
|
|
break;
|
|
nsDisplayList* subList = i->GetList();
|
|
if (subList) {
|
|
PruneDisplayListForExtraPage(aBuilder, aExtraPage, aY, subList);
|
|
nsDisplayItem::Type type = i->GetType();
|
|
if (type == nsDisplayItem::TYPE_CLIP ||
|
|
type == nsDisplayItem::TYPE_CLIP_ROUNDED_RECT) {
|
|
// This might clip an element which should appear on the first
|
|
// page, and that element might be visible if this uses a 'clip'
|
|
// property with a negative top.
|
|
// The clip area needs to be moved because the frame geometry doesn't
|
|
// put page content frames for adjacent pages vertically adjacent,
|
|
// there are page margins and dead space between them in print
|
|
// preview, and in printing all pages are at (0,0)...
|
|
// XXX we have no way to test this right now that I know of;
|
|
// the 'clip' property requires an abs-pos element and we never
|
|
// paint abs-pos elements that start after the main page
|
|
// (bug 426909).
|
|
nsDisplayClip* clip = static_cast<nsDisplayClip*>(i);
|
|
clip->SetClipRect(clip->GetClipRect() + nsPoint(0, aY) -
|
|
aExtraPage->GetOffsetTo(mainPage));
|
|
}
|
|
newList.AppendToTop(i);
|
|
} else {
|
|
nsIFrame* f = i->GetUnderlyingFrame();
|
|
if (f && nsLayoutUtils::IsProperAncestorFrameCrossDoc(mainPage, f)) {
|
|
// This one is in the page we care about, keep it
|
|
newList.AppendToTop(i);
|
|
} else {
|
|
// We're throwing this away so call its destructor now. The memory
|
|
// is owned by aBuilder which destroys all items at once.
|
|
i->~nsDisplayItem();
|
|
}
|
|
}
|
|
}
|
|
aList->AppendToTop(&newList);
|
|
}
|
|
|
|
static nsresult
|
|
BuildDisplayListForExtraPage(nsDisplayListBuilder* aBuilder,
|
|
nsIFrame* aPage, nscoord aY, nsDisplayList* aList)
|
|
{
|
|
nsDisplayList list;
|
|
// Pass an empty dirty rect since we're only interested in finding
|
|
// placeholders whose out-of-flows are in the page
|
|
// aBuilder->GetReferenceFrame(), and the paths to those placeholders
|
|
// have already been marked as NS_FRAME_FORCE_DISPLAY_LIST_DESCEND_INTO.
|
|
// Note that we should still do a prune step since we don't want to
|
|
// rely on dirty-rect checking for correctness.
|
|
nsresult rv = aPage->BuildDisplayListForStackingContext(aBuilder, nsRect(), &list);
|
|
if (NS_FAILED(rv))
|
|
return rv;
|
|
PruneDisplayListForExtraPage(aBuilder, aPage, aY, &list);
|
|
aList->AppendToTop(&list);
|
|
return NS_OK;
|
|
}
|
|
|
|
static nsIFrame*
|
|
GetNextPage(nsIFrame* aPageContentFrame)
|
|
{
|
|
// XXX ugh
|
|
nsIFrame* pageFrame = aPageContentFrame->GetParent();
|
|
NS_ASSERTION(pageFrame->GetType() == nsGkAtoms::pageFrame,
|
|
"pageContentFrame has unexpected parent");
|
|
nsIFrame* nextPageFrame = pageFrame->GetNextSibling();
|
|
if (!nextPageFrame)
|
|
return nsnull;
|
|
NS_ASSERTION(nextPageFrame->GetType() == nsGkAtoms::pageFrame,
|
|
"pageFrame's sibling is not a page frame...");
|
|
nsIFrame* f = nextPageFrame->GetFirstChild(nsnull);
|
|
NS_ASSERTION(f, "pageFrame has no page content frame!");
|
|
NS_ASSERTION(f->GetType() == nsGkAtoms::pageContentFrame,
|
|
"pageFrame's child is not page content!");
|
|
return f;
|
|
}
|
|
|
|
nsresult
|
|
nsLayoutUtils::PaintFrame(nsRenderingContext* aRenderingContext, nsIFrame* aFrame,
|
|
const nsRegion& aDirtyRegion, nscolor aBackstop,
|
|
PRUint32 aFlags)
|
|
{
|
|
if (aFlags & PAINT_WIDGET_LAYERS) {
|
|
nsIView* view = aFrame->GetView();
|
|
if (!(view && view->GetWidget() && GetDisplayRootFrame(aFrame) == aFrame)) {
|
|
aFlags &= ~PAINT_WIDGET_LAYERS;
|
|
NS_ASSERTION(aRenderingContext, "need a rendering context");
|
|
}
|
|
}
|
|
|
|
nsPresContext* presContext = aFrame->PresContext();
|
|
nsIPresShell* presShell = presContext->PresShell();
|
|
|
|
nsIFrame* rootScrollFrame = presShell->GetRootScrollFrame();
|
|
bool usingDisplayPort = false;
|
|
nsRect displayport;
|
|
if (rootScrollFrame) {
|
|
nsIContent* content = rootScrollFrame->GetContent();
|
|
if (content) {
|
|
usingDisplayPort = nsLayoutUtils::GetDisplayPort(content, &displayport);
|
|
}
|
|
}
|
|
|
|
PRBool ignoreViewportScrolling = presShell->IgnoringViewportScrolling();
|
|
nsRegion visibleRegion;
|
|
if (aFlags & PAINT_WIDGET_LAYERS) {
|
|
// This layer tree will be reused, so we'll need to calculate it
|
|
// for the whole "visible" area of the window
|
|
//
|
|
// |ignoreViewportScrolling| and |usingDisplayPort| are persistent
|
|
// document-rendering state. We rely on PresShell to flush
|
|
// retained layers as needed when that persistent state changes.
|
|
if (!usingDisplayPort) {
|
|
visibleRegion = aFrame->GetVisualOverflowRectRelativeToSelf();
|
|
} else {
|
|
visibleRegion = displayport;
|
|
}
|
|
} else {
|
|
visibleRegion = aDirtyRegion;
|
|
}
|
|
|
|
// If we're going to display something different from what we'd normally
|
|
// paint in a window then we will flush out any retained layer trees before
|
|
// *and after* we draw.
|
|
PRBool willFlushRetainedLayers = (aFlags & PAINT_HIDE_CARET) != 0;
|
|
|
|
nsDisplayListBuilder builder(aFrame, nsDisplayListBuilder::PAINTING,
|
|
!(aFlags & PAINT_HIDE_CARET));
|
|
if (usingDisplayPort) {
|
|
builder.SetDisplayPort(displayport);
|
|
}
|
|
|
|
nsDisplayList list;
|
|
if (aFlags & PAINT_IN_TRANSFORM) {
|
|
builder.SetInTransform(PR_TRUE);
|
|
}
|
|
if (aFlags & PAINT_SYNC_DECODE_IMAGES) {
|
|
builder.SetSyncDecodeImages(PR_TRUE);
|
|
}
|
|
if (aFlags & (PAINT_WIDGET_LAYERS | PAINT_TO_WINDOW)) {
|
|
builder.SetPaintingToWindow(PR_TRUE);
|
|
}
|
|
if (aFlags & PAINT_IGNORE_SUPPRESSION) {
|
|
builder.IgnorePaintSuppression();
|
|
}
|
|
if (aRenderingContext &&
|
|
aRenderingContext->ThebesContext()->GetFlags() & gfxContext::FLAG_DISABLE_SNAPPING) {
|
|
builder.SetSnappingEnabled(PR_FALSE);
|
|
}
|
|
nsRect canvasArea(nsPoint(0, 0), aFrame->GetSize());
|
|
|
|
#ifdef DEBUG
|
|
if (ignoreViewportScrolling) {
|
|
nsIDocument* doc = aFrame->GetContent() ?
|
|
aFrame->GetContent()->GetCurrentDoc() : nsnull;
|
|
NS_ASSERTION(!aFrame->GetParent() ||
|
|
(doc && doc->IsBeingUsedAsImage()),
|
|
"Only expecting ignoreViewportScrolling for root frames and "
|
|
"for image documents.");
|
|
}
|
|
#endif
|
|
|
|
if (ignoreViewportScrolling && !aFrame->GetParent()) {
|
|
nsIFrame* rootScrollFrame = presShell->GetRootScrollFrame();
|
|
if (rootScrollFrame) {
|
|
nsIScrollableFrame* rootScrollableFrame =
|
|
presShell->GetRootScrollFrameAsScrollable();
|
|
if (aFlags & PAINT_DOCUMENT_RELATIVE) {
|
|
// Make visibleRegion and aRenderingContext relative to the
|
|
// scrolled frame instead of the root frame.
|
|
nsPoint pos = rootScrollableFrame->GetScrollPosition();
|
|
visibleRegion.MoveBy(-pos);
|
|
if (aRenderingContext) {
|
|
aRenderingContext->Translate(pos);
|
|
}
|
|
}
|
|
builder.SetIgnoreScrollFrame(rootScrollFrame);
|
|
|
|
nsCanvasFrame* canvasFrame =
|
|
do_QueryFrame(rootScrollableFrame->GetScrolledFrame());
|
|
if (canvasFrame) {
|
|
// Use UnionRect here to ensure that areas where the scrollbars
|
|
// were are still filled with the background color.
|
|
canvasArea.UnionRect(canvasArea,
|
|
canvasFrame->CanvasArea() + builder.ToReferenceFrame(canvasFrame));
|
|
}
|
|
}
|
|
}
|
|
nsresult rv;
|
|
|
|
nsRect dirtyRect = visibleRegion.GetBounds();
|
|
builder.EnterPresShell(aFrame, dirtyRect);
|
|
|
|
rv = aFrame->BuildDisplayListForStackingContext(&builder, dirtyRect, &list);
|
|
|
|
const PRBool paintAllContinuations = aFlags & PAINT_ALL_CONTINUATIONS;
|
|
NS_ASSERTION(!paintAllContinuations || !aFrame->GetPrevContinuation(),
|
|
"If painting all continuations, the frame must be "
|
|
"first-continuation");
|
|
|
|
nsIAtom* frameType = aFrame->GetType();
|
|
if (NS_SUCCEEDED(rv) && !paintAllContinuations &&
|
|
frameType == nsGkAtoms::pageContentFrame) {
|
|
NS_ASSERTION(!(aFlags & PAINT_WIDGET_LAYERS),
|
|
"shouldn't be painting with widget layers for page content frames");
|
|
// We may need to paint out-of-flow frames whose placeholders are
|
|
// on other pages. Add those pages to our display list. Note that
|
|
// out-of-flow frames can't be placed after their placeholders so
|
|
// we don't have to process earlier pages. The display lists for
|
|
// these extra pages are pruned so that only display items for the
|
|
// page we currently care about (which we would have reached by
|
|
// following placeholders to their out-of-flows) end up on the list.
|
|
nsIFrame* page = aFrame;
|
|
nscoord y = aFrame->GetSize().height;
|
|
while ((page = GetNextPage(page)) != nsnull) {
|
|
rv = BuildDisplayListForExtraPage(&builder, page, y, &list);
|
|
if (NS_FAILED(rv))
|
|
break;
|
|
y += page->GetSize().height;
|
|
}
|
|
}
|
|
|
|
if (paintAllContinuations) {
|
|
nsIFrame* currentFrame = aFrame;
|
|
while (NS_SUCCEEDED(rv) &&
|
|
(currentFrame = currentFrame->GetNextContinuation()) != nsnull) {
|
|
nsRect frameDirty = dirtyRect - builder.ToReferenceFrame(currentFrame);
|
|
rv = currentFrame->BuildDisplayListForStackingContext(&builder,
|
|
frameDirty, &list);
|
|
}
|
|
}
|
|
|
|
// For the viewport frame in print preview/page layout we want to paint
|
|
// the grey background behind the page, not the canvas color.
|
|
if (frameType == nsGkAtoms::viewportFrame &&
|
|
nsLayoutUtils::NeedsPrintPreviewBackground(presContext)) {
|
|
nsRect bounds = nsRect(builder.ToReferenceFrame(aFrame),
|
|
aFrame->GetSize());
|
|
rv = presShell->AddPrintPreviewBackgroundItem(builder, list, aFrame, bounds);
|
|
} else if (frameType != nsGkAtoms::pageFrame) {
|
|
// For printing, this function is first called on an nsPageFrame, which
|
|
// creates a display list with a PageContent item. The PageContent item's
|
|
// paint function calls this function on the nsPageFrame's child which is
|
|
// an nsPageContentFrame. We only want to add the canvas background color
|
|
// item once, for the nsPageContentFrame.
|
|
|
|
// Add the canvas background color to the bottom of the list. This
|
|
// happens after we've built the list so that AddCanvasBackgroundColorItem
|
|
// can monkey with the contents if necessary.
|
|
rv = presShell->AddCanvasBackgroundColorItem(
|
|
builder, list, aFrame, canvasArea, aBackstop);
|
|
|
|
// If the passed in backstop color makes us draw something different from
|
|
// normal, we need to flush layers.
|
|
if ((aFlags & PAINT_WIDGET_LAYERS) && !willFlushRetainedLayers) {
|
|
nsIView* view = aFrame->GetView();
|
|
if (view) {
|
|
nscolor backstop = presShell->ComputeBackstopColor(view);
|
|
// The PresShell's canvas background color doesn't get updated until
|
|
// EnterPresShell, so this check has to be done after that.
|
|
nscolor canvasColor = presShell->GetCanvasBackground();
|
|
if (NS_ComposeColors(aBackstop, canvasColor) !=
|
|
NS_ComposeColors(backstop, canvasColor)) {
|
|
willFlushRetainedLayers = PR_TRUE;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
builder.LeavePresShell(aFrame, dirtyRect);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
if (builder.GetHadToIgnorePaintSuppression()) {
|
|
willFlushRetainedLayers = PR_TRUE;
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
if (gDumpPaintList) {
|
|
fprintf(stdout, "Painting --- before optimization (dirty %d,%d,%d,%d):\n",
|
|
dirtyRect.x, dirtyRect.y, dirtyRect.width, dirtyRect.height);
|
|
nsFrame::PrintDisplayList(&builder, list);
|
|
}
|
|
#endif
|
|
|
|
list.ComputeVisibilityForRoot(&builder, &visibleRegion);
|
|
|
|
PRUint32 flags = nsDisplayList::PAINT_DEFAULT;
|
|
if (aFlags & PAINT_WIDGET_LAYERS) {
|
|
flags |= nsDisplayList::PAINT_USE_WIDGET_LAYERS;
|
|
if (willFlushRetainedLayers) {
|
|
// The caller wanted to paint from retained layers, but set up
|
|
// the paint in such a way that we can't use them. We're going
|
|
// to display something different from what we'd normally paint
|
|
// in a window, so make sure we flush out any retained layer
|
|
// trees before *and after* we draw. Callers should be fixed to
|
|
// not do this.
|
|
NS_WARNING("Flushing retained layers!");
|
|
flags |= nsDisplayList::PAINT_FLUSH_LAYERS;
|
|
} else if (!(aFlags & PAINT_DOCUMENT_RELATIVE)) {
|
|
nsIWidget *widget = aFrame->GetNearestWidget();
|
|
if (widget) {
|
|
builder.SetFinalTransparentRegion(visibleRegion);
|
|
// If we're finished building display list items for painting of the outermost
|
|
// pres shell, notify the widget about any toolbars we've encountered.
|
|
widget->UpdateThemeGeometries(builder.GetThemeGeometries());
|
|
}
|
|
}
|
|
}
|
|
if (aFlags & PAINT_EXISTING_TRANSACTION) {
|
|
flags |= nsDisplayList::PAINT_EXISTING_TRANSACTION;
|
|
}
|
|
|
|
list.PaintRoot(&builder, aRenderingContext, flags);
|
|
|
|
// Update the widget's opaque region information. This sets
|
|
// glass boundaries on Windows.
|
|
if ((aFlags & PAINT_WIDGET_LAYERS) &&
|
|
!willFlushRetainedLayers &&
|
|
!(aFlags & PAINT_DOCUMENT_RELATIVE)) {
|
|
nsIWidget *widget = aFrame->GetNearestWidget();
|
|
if (widget) {
|
|
nsRegion excludedRegion = builder.GetExcludedGlassRegion();
|
|
excludedRegion.Sub(excludedRegion, visibleRegion);
|
|
nsIntRegion windowRegion(excludedRegion.ToNearestPixels(presContext->AppUnitsPerDevPixel()));
|
|
widget->UpdateOpaqueRegion(windowRegion);
|
|
}
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
if (gDumpPaintList) {
|
|
fprintf(stdout, "Painting --- after optimization:\n");
|
|
nsFrame::PrintDisplayList(&builder, list);
|
|
|
|
fprintf(stdout, "Painting --- retained layer tree:\n");
|
|
builder.LayerBuilder()->DumpRetainedLayerTree();
|
|
}
|
|
#endif
|
|
|
|
// Flush the list so we don't trigger the IsEmpty-on-destruction assertion
|
|
list.DeleteAll();
|
|
return NS_OK;
|
|
}
|
|
|
|
PRInt32
|
|
nsLayoutUtils::GetZIndex(nsIFrame* aFrame) {
|
|
if (!aFrame->GetStyleDisplay()->IsPositioned())
|
|
return 0;
|
|
|
|
const nsStylePosition* position =
|
|
aFrame->GetStylePosition();
|
|
if (position->mZIndex.GetUnit() == eStyleUnit_Integer)
|
|
return position->mZIndex.GetIntValue();
|
|
|
|
// sort the auto and 0 elements together
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Uses a binary search for find where the cursor falls in the line of text
|
|
* It also keeps track of the part of the string that has already been measured
|
|
* so it doesn't have to keep measuring the same text over and over
|
|
*
|
|
* @param "aBaseWidth" contains the width in twips of the portion
|
|
* of the text that has already been measured, and aBaseInx contains
|
|
* the index of the text that has already been measured.
|
|
*
|
|
* @param aTextWidth returns the (in twips) the length of the text that falls
|
|
* before the cursor aIndex contains the index of the text where the cursor falls
|
|
*/
|
|
PRBool
|
|
nsLayoutUtils::BinarySearchForPosition(nsRenderingContext* aRendContext,
|
|
const PRUnichar* aText,
|
|
PRInt32 aBaseWidth,
|
|
PRInt32 aBaseInx,
|
|
PRInt32 aStartInx,
|
|
PRInt32 aEndInx,
|
|
PRInt32 aCursorPos,
|
|
PRInt32& aIndex,
|
|
PRInt32& aTextWidth)
|
|
{
|
|
PRInt32 range = aEndInx - aStartInx;
|
|
if ((range == 1) || (range == 2 && NS_IS_HIGH_SURROGATE(aText[aStartInx]))) {
|
|
aIndex = aStartInx + aBaseInx;
|
|
aTextWidth = aRendContext->GetWidth(aText, aIndex);
|
|
return PR_TRUE;
|
|
}
|
|
|
|
PRInt32 inx = aStartInx + (range / 2);
|
|
|
|
// Make sure we don't leave a dangling low surrogate
|
|
if (NS_IS_HIGH_SURROGATE(aText[inx-1]))
|
|
inx++;
|
|
|
|
PRInt32 textWidth = aRendContext->GetWidth(aText, inx);
|
|
|
|
PRInt32 fullWidth = aBaseWidth + textWidth;
|
|
if (fullWidth == aCursorPos) {
|
|
aTextWidth = textWidth;
|
|
aIndex = inx;
|
|
return PR_TRUE;
|
|
} else if (aCursorPos < fullWidth) {
|
|
aTextWidth = aBaseWidth;
|
|
if (BinarySearchForPosition(aRendContext, aText, aBaseWidth, aBaseInx, aStartInx, inx, aCursorPos, aIndex, aTextWidth)) {
|
|
return PR_TRUE;
|
|
}
|
|
} else {
|
|
aTextWidth = fullWidth;
|
|
if (BinarySearchForPosition(aRendContext, aText, aBaseWidth, aBaseInx, inx, aEndInx, aCursorPos, aIndex, aTextWidth)) {
|
|
return PR_TRUE;
|
|
}
|
|
}
|
|
return PR_FALSE;
|
|
}
|
|
|
|
static void
|
|
AddBoxesForFrame(nsIFrame* aFrame,
|
|
nsLayoutUtils::BoxCallback* aCallback)
|
|
{
|
|
nsIAtom* pseudoType = aFrame->GetStyleContext()->GetPseudo();
|
|
|
|
if (pseudoType == nsCSSAnonBoxes::tableOuter) {
|
|
AddBoxesForFrame(aFrame->GetFirstChild(nsnull), aCallback);
|
|
nsIFrame* kid = aFrame->GetFirstChild(nsGkAtoms::captionList);
|
|
if (kid) {
|
|
AddBoxesForFrame(kid, aCallback);
|
|
}
|
|
} else if (pseudoType == nsCSSAnonBoxes::mozAnonymousBlock ||
|
|
pseudoType == nsCSSAnonBoxes::mozAnonymousPositionedBlock ||
|
|
pseudoType == nsCSSAnonBoxes::mozMathMLAnonymousBlock ||
|
|
pseudoType == nsCSSAnonBoxes::mozXULAnonymousBlock) {
|
|
for (nsIFrame* kid = aFrame->GetFirstChild(nsnull); kid; kid = kid->GetNextSibling()) {
|
|
AddBoxesForFrame(kid, aCallback);
|
|
}
|
|
} else {
|
|
aCallback->AddBox(aFrame);
|
|
}
|
|
}
|
|
|
|
void
|
|
nsLayoutUtils::GetAllInFlowBoxes(nsIFrame* aFrame, BoxCallback* aCallback)
|
|
{
|
|
while (aFrame) {
|
|
AddBoxesForFrame(aFrame, aCallback);
|
|
aFrame = nsLayoutUtils::GetNextContinuationOrSpecialSibling(aFrame);
|
|
}
|
|
}
|
|
|
|
struct BoxToBorderRect : public nsLayoutUtils::BoxCallback {
|
|
nsIFrame* mRelativeTo;
|
|
nsLayoutUtils::RectCallback* mCallback;
|
|
|
|
BoxToBorderRect(nsIFrame* aRelativeTo, nsLayoutUtils::RectCallback* aCallback)
|
|
: mRelativeTo(aRelativeTo), mCallback(aCallback) {}
|
|
|
|
virtual void AddBox(nsIFrame* aFrame) {
|
|
nsRect r;
|
|
nsIFrame* outer = nsSVGUtils::GetOuterSVGFrameAndCoveredRegion(aFrame, &r);
|
|
if (outer) {
|
|
mCallback->AddRect(r + outer->GetOffsetTo(mRelativeTo));
|
|
} else
|
|
mCallback->AddRect(nsRect(aFrame->GetOffsetTo(mRelativeTo), aFrame->GetSize()));
|
|
}
|
|
};
|
|
|
|
void
|
|
nsLayoutUtils::GetAllInFlowRects(nsIFrame* aFrame, nsIFrame* aRelativeTo,
|
|
RectCallback* aCallback)
|
|
{
|
|
BoxToBorderRect converter(aRelativeTo, aCallback);
|
|
GetAllInFlowBoxes(aFrame, &converter);
|
|
}
|
|
|
|
nsLayoutUtils::RectAccumulator::RectAccumulator() : mSeenFirstRect(PR_FALSE) {}
|
|
|
|
void nsLayoutUtils::RectAccumulator::AddRect(const nsRect& aRect) {
|
|
mResultRect.UnionRect(mResultRect, aRect);
|
|
if (!mSeenFirstRect) {
|
|
mSeenFirstRect = PR_TRUE;
|
|
mFirstRect = aRect;
|
|
}
|
|
}
|
|
|
|
nsLayoutUtils::RectListBuilder::RectListBuilder(nsClientRectList* aList)
|
|
: mRectList(aList), mRV(NS_OK) {}
|
|
|
|
void nsLayoutUtils::RectListBuilder::AddRect(const nsRect& aRect) {
|
|
nsRefPtr<nsClientRect> rect = new nsClientRect();
|
|
|
|
rect->SetLayoutRect(aRect);
|
|
mRectList->Append(rect);
|
|
}
|
|
|
|
nsIFrame* nsLayoutUtils::GetContainingBlockForClientRect(nsIFrame* aFrame)
|
|
{
|
|
// get the nearest enclosing SVG foreign object frame or the root frame
|
|
while (aFrame->GetParent() &&
|
|
!aFrame->IsFrameOfType(nsIFrame::eSVGForeignObject)) {
|
|
aFrame = aFrame->GetParent();
|
|
}
|
|
|
|
return aFrame;
|
|
}
|
|
|
|
nsRect
|
|
nsLayoutUtils::GetAllInFlowRectsUnion(nsIFrame* aFrame, nsIFrame* aRelativeTo) {
|
|
RectAccumulator accumulator;
|
|
GetAllInFlowRects(aFrame, aRelativeTo, &accumulator);
|
|
return accumulator.mResultRect.IsEmpty() ? accumulator.mFirstRect
|
|
: accumulator.mResultRect;
|
|
}
|
|
|
|
nsRect
|
|
nsLayoutUtils::GetTextShadowRectsUnion(const nsRect& aTextAndDecorationsRect,
|
|
nsIFrame* aFrame,
|
|
PRUint32 aFlags)
|
|
{
|
|
const nsStyleText* textStyle = aFrame->GetStyleText();
|
|
if (!textStyle->mTextShadow)
|
|
return aTextAndDecorationsRect;
|
|
|
|
nsRect resultRect = aTextAndDecorationsRect;
|
|
PRInt32 A2D = aFrame->PresContext()->AppUnitsPerDevPixel();
|
|
for (PRUint32 i = 0; i < textStyle->mTextShadow->Length(); ++i) {
|
|
nsCSSShadowItem* shadow = textStyle->mTextShadow->ShadowAt(i);
|
|
nsMargin blur = nsContextBoxBlur::GetBlurRadiusMargin(shadow->mRadius, A2D);
|
|
if ((aFlags & EXCLUDE_BLUR_SHADOWS) && blur != nsMargin(0, 0, 0, 0))
|
|
continue;
|
|
|
|
nsRect tmpRect(aTextAndDecorationsRect);
|
|
|
|
tmpRect.MoveBy(nsPoint(shadow->mXOffset, shadow->mYOffset));
|
|
tmpRect.Inflate(blur);
|
|
|
|
resultRect.UnionRect(resultRect, tmpRect);
|
|
}
|
|
return resultRect;
|
|
}
|
|
|
|
nsresult
|
|
nsLayoutUtils::GetFontMetricsForFrame(const nsIFrame* aFrame,
|
|
nsFontMetrics** aFontMetrics)
|
|
{
|
|
return nsLayoutUtils::GetFontMetricsForStyleContext(aFrame->GetStyleContext(),
|
|
aFontMetrics);
|
|
}
|
|
|
|
nsresult
|
|
nsLayoutUtils::GetFontMetricsForStyleContext(nsStyleContext* aStyleContext,
|
|
nsFontMetrics** aFontMetrics)
|
|
{
|
|
// pass the user font set object into the device context to pass along to CreateFontGroup
|
|
gfxUserFontSet* fs = aStyleContext->PresContext()->GetUserFontSet();
|
|
|
|
return aStyleContext->PresContext()->DeviceContext()->GetMetricsFor(
|
|
aStyleContext->GetStyleFont()->mFont,
|
|
aStyleContext->GetStyleVisibility()->mLanguage,
|
|
fs, *aFontMetrics);
|
|
}
|
|
|
|
nsIFrame*
|
|
nsLayoutUtils::FindChildContainingDescendant(nsIFrame* aParent, nsIFrame* aDescendantFrame)
|
|
{
|
|
nsIFrame* result = aDescendantFrame;
|
|
|
|
while (result) {
|
|
nsIFrame* parent = result->GetParent();
|
|
if (parent == aParent) {
|
|
break;
|
|
}
|
|
|
|
// The frame is not an immediate child of aParent so walk up another level
|
|
result = parent;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
nsBlockFrame*
|
|
nsLayoutUtils::GetAsBlock(nsIFrame* aFrame)
|
|
{
|
|
nsBlockFrame* block = do_QueryFrame(aFrame);
|
|
return block;
|
|
}
|
|
|
|
nsBlockFrame*
|
|
nsLayoutUtils::FindNearestBlockAncestor(nsIFrame* aFrame)
|
|
{
|
|
nsIFrame* nextAncestor;
|
|
for (nextAncestor = aFrame->GetParent(); nextAncestor;
|
|
nextAncestor = nextAncestor->GetParent()) {
|
|
nsBlockFrame* block = GetAsBlock(nextAncestor);
|
|
if (block)
|
|
return block;
|
|
}
|
|
return nsnull;
|
|
}
|
|
|
|
nsIFrame*
|
|
nsLayoutUtils::GetNonGeneratedAncestor(nsIFrame* aFrame)
|
|
{
|
|
if (!(aFrame->GetStateBits() & NS_FRAME_GENERATED_CONTENT))
|
|
return aFrame;
|
|
|
|
nsFrameManager* frameManager = aFrame->PresContext()->FrameManager();
|
|
nsIFrame* f = aFrame;
|
|
do {
|
|
f = GetParentOrPlaceholderFor(frameManager, f);
|
|
} while (f->GetStateBits() & NS_FRAME_GENERATED_CONTENT);
|
|
return f;
|
|
}
|
|
|
|
nsIFrame*
|
|
nsLayoutUtils::GetParentOrPlaceholderFor(nsFrameManager* aFrameManager,
|
|
nsIFrame* aFrame)
|
|
{
|
|
if ((aFrame->GetStateBits() & NS_FRAME_OUT_OF_FLOW)
|
|
&& !aFrame->GetPrevInFlow()) {
|
|
return aFrameManager->GetPlaceholderFrameFor(aFrame);
|
|
}
|
|
return aFrame->GetParent();
|
|
}
|
|
|
|
nsIFrame*
|
|
nsLayoutUtils::GetNextContinuationOrSpecialSibling(nsIFrame *aFrame)
|
|
{
|
|
nsIFrame *result = aFrame->GetNextContinuation();
|
|
if (result)
|
|
return result;
|
|
|
|
if ((aFrame->GetStateBits() & NS_FRAME_IS_SPECIAL) != 0) {
|
|
// We only store the "special sibling" annotation with the first
|
|
// frame in the continuation chain. Walk back to find that frame now.
|
|
aFrame = aFrame->GetFirstContinuation();
|
|
|
|
void* value = aFrame->Properties().Get(nsIFrame::IBSplitSpecialSibling());
|
|
return static_cast<nsIFrame*>(value);
|
|
}
|
|
|
|
return nsnull;
|
|
}
|
|
|
|
nsIFrame*
|
|
nsLayoutUtils::GetFirstContinuationOrSpecialSibling(nsIFrame *aFrame)
|
|
{
|
|
nsIFrame *result = aFrame->GetFirstContinuation();
|
|
if (result->GetStateBits() & NS_FRAME_IS_SPECIAL) {
|
|
while (PR_TRUE) {
|
|
nsIFrame *f = static_cast<nsIFrame*>
|
|
(result->Properties().Get(nsIFrame::IBSplitSpecialPrevSibling()));
|
|
if (!f)
|
|
break;
|
|
result = f;
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
PRBool
|
|
nsLayoutUtils::IsViewportScrollbarFrame(nsIFrame* aFrame)
|
|
{
|
|
if (!aFrame)
|
|
return PR_FALSE;
|
|
|
|
nsIFrame* rootScrollFrame =
|
|
aFrame->PresContext()->PresShell()->GetRootScrollFrame();
|
|
if (!rootScrollFrame)
|
|
return PR_FALSE;
|
|
|
|
nsIScrollableFrame* rootScrollableFrame = do_QueryFrame(rootScrollFrame);
|
|
NS_ASSERTION(rootScrollableFrame, "The root scorollable frame is null");
|
|
|
|
if (!IsProperAncestorFrame(rootScrollFrame, aFrame))
|
|
return PR_FALSE;
|
|
|
|
nsIFrame* rootScrolledFrame = rootScrollableFrame->GetScrolledFrame();
|
|
return !(rootScrolledFrame == aFrame ||
|
|
IsProperAncestorFrame(rootScrolledFrame, aFrame));
|
|
}
|
|
|
|
static nscoord AddPercents(nsLayoutUtils::IntrinsicWidthType aType,
|
|
nscoord aCurrent, float aPercent)
|
|
{
|
|
nscoord result = aCurrent;
|
|
if (aPercent > 0.0f && aType == nsLayoutUtils::PREF_WIDTH) {
|
|
// XXX Should we also consider percentages for min widths, up to a
|
|
// limit?
|
|
if (aPercent >= 1.0f)
|
|
result = nscoord_MAX;
|
|
else
|
|
result = NSToCoordRound(float(result) / (1.0f - aPercent));
|
|
}
|
|
return result;
|
|
}
|
|
|
|
// Use only for widths/heights (or their min/max), since it clamps
|
|
// negative calc() results to 0.
|
|
static PRBool GetAbsoluteCoord(const nsStyleCoord& aStyle, nscoord& aResult)
|
|
{
|
|
if (aStyle.IsCalcUnit()) {
|
|
if (aStyle.CalcHasPercent()) {
|
|
return PR_FALSE;
|
|
}
|
|
// If it has no percents, we can pass 0 for the percentage basis.
|
|
aResult = nsRuleNode::ComputeComputedCalc(aStyle, 0);
|
|
if (aResult < 0)
|
|
aResult = 0;
|
|
return PR_TRUE;
|
|
}
|
|
|
|
if (eStyleUnit_Coord != aStyle.GetUnit())
|
|
return PR_FALSE;
|
|
|
|
aResult = aStyle.GetCoordValue();
|
|
NS_ASSERTION(aResult >= 0, "negative widths not allowed");
|
|
return PR_TRUE;
|
|
}
|
|
|
|
static PRBool
|
|
GetPercentHeight(const nsStyleCoord& aStyle,
|
|
nsIFrame* aFrame,
|
|
nscoord& aResult)
|
|
{
|
|
if (eStyleUnit_Percent != aStyle.GetUnit())
|
|
return PR_FALSE;
|
|
|
|
nsIFrame *f;
|
|
for (f = aFrame->GetParent(); f && !f->IsContainingBlock();
|
|
f = f->GetParent())
|
|
;
|
|
if (!f) {
|
|
NS_NOTREACHED("top of frame tree not a containing block");
|
|
return PR_FALSE;
|
|
}
|
|
|
|
const nsStylePosition *pos = f->GetStylePosition();
|
|
nscoord h;
|
|
if (!GetAbsoluteCoord(pos->mHeight, h) &&
|
|
!GetPercentHeight(pos->mHeight, f, h)) {
|
|
NS_ASSERTION(pos->mHeight.GetUnit() == eStyleUnit_Auto ||
|
|
pos->mHeight.HasPercent(),
|
|
"unknown height unit");
|
|
nsIAtom* fType = f->GetType();
|
|
if (fType != nsGkAtoms::viewportFrame && fType != nsGkAtoms::canvasFrame &&
|
|
fType != nsGkAtoms::pageContentFrame) {
|
|
// There's no basis for the percentage height, so it acts like auto.
|
|
// Should we consider a max-height < min-height pair a basis for
|
|
// percentage heights? The spec is somewhat unclear, and not doing
|
|
// so is simpler and avoids troubling discontinuities in behavior,
|
|
// so I'll choose not to. -LDB
|
|
return PR_FALSE;
|
|
}
|
|
|
|
NS_ASSERTION(pos->mHeight.GetUnit() == eStyleUnit_Auto,
|
|
"Unexpected height unit for viewport or canvas or page-content");
|
|
// For the viewport, canvas, and page-content kids, the percentage
|
|
// basis is just the parent height.
|
|
h = f->GetSize().height;
|
|
if (h == NS_UNCONSTRAINEDSIZE) {
|
|
// We don't have a percentage basis after all
|
|
return PR_FALSE;
|
|
}
|
|
}
|
|
|
|
nscoord maxh;
|
|
if (GetAbsoluteCoord(pos->mMaxHeight, maxh) ||
|
|
GetPercentHeight(pos->mMaxHeight, f, maxh)) {
|
|
if (maxh < h)
|
|
h = maxh;
|
|
} else {
|
|
NS_ASSERTION(pos->mMaxHeight.GetUnit() == eStyleUnit_None ||
|
|
pos->mMaxHeight.HasPercent(),
|
|
"unknown max-height unit");
|
|
}
|
|
|
|
nscoord minh;
|
|
if (GetAbsoluteCoord(pos->mMinHeight, minh) ||
|
|
GetPercentHeight(pos->mMinHeight, f, minh)) {
|
|
if (minh > h)
|
|
h = minh;
|
|
} else {
|
|
NS_ASSERTION(pos->mMinHeight.HasPercent(),
|
|
"unknown min-height unit");
|
|
}
|
|
|
|
aResult = NSToCoordRound(aStyle.GetPercentValue() * h);
|
|
return PR_TRUE;
|
|
}
|
|
|
|
// Handles only -moz-max-content and -moz-min-content, and
|
|
// -moz-fit-content for min-width and max-width, since the others
|
|
// (-moz-fit-content for width, and -moz-available) have no effect on
|
|
// intrinsic widths.
|
|
enum eWidthProperty { PROP_WIDTH, PROP_MAX_WIDTH, PROP_MIN_WIDTH };
|
|
static PRBool
|
|
GetIntrinsicCoord(const nsStyleCoord& aStyle,
|
|
nsRenderingContext* aRenderingContext,
|
|
nsIFrame* aFrame,
|
|
eWidthProperty aProperty,
|
|
nscoord& aResult)
|
|
{
|
|
NS_PRECONDITION(aProperty == PROP_WIDTH || aProperty == PROP_MAX_WIDTH ||
|
|
aProperty == PROP_MIN_WIDTH, "unexpected property");
|
|
if (aStyle.GetUnit() != eStyleUnit_Enumerated)
|
|
return PR_FALSE;
|
|
PRInt32 val = aStyle.GetIntValue();
|
|
NS_ASSERTION(val == NS_STYLE_WIDTH_MAX_CONTENT ||
|
|
val == NS_STYLE_WIDTH_MIN_CONTENT ||
|
|
val == NS_STYLE_WIDTH_FIT_CONTENT ||
|
|
val == NS_STYLE_WIDTH_AVAILABLE,
|
|
"unexpected enumerated value for width property");
|
|
if (val == NS_STYLE_WIDTH_AVAILABLE)
|
|
return PR_FALSE;
|
|
if (val == NS_STYLE_WIDTH_FIT_CONTENT) {
|
|
if (aProperty == PROP_WIDTH)
|
|
return PR_FALSE; // handle like 'width: auto'
|
|
if (aProperty == PROP_MAX_WIDTH)
|
|
// constrain large 'width' values down to -moz-max-content
|
|
val = NS_STYLE_WIDTH_MAX_CONTENT;
|
|
else
|
|
// constrain small 'width' or 'max-width' values up to -moz-min-content
|
|
val = NS_STYLE_WIDTH_MIN_CONTENT;
|
|
}
|
|
|
|
NS_ASSERTION(val == NS_STYLE_WIDTH_MAX_CONTENT ||
|
|
val == NS_STYLE_WIDTH_MIN_CONTENT,
|
|
"should have reduced everything remaining to one of these");
|
|
if (val == NS_STYLE_WIDTH_MAX_CONTENT)
|
|
aResult = aFrame->GetPrefWidth(aRenderingContext);
|
|
else
|
|
aResult = aFrame->GetMinWidth(aRenderingContext);
|
|
return PR_TRUE;
|
|
}
|
|
|
|
#undef DEBUG_INTRINSIC_WIDTH
|
|
|
|
#ifdef DEBUG_INTRINSIC_WIDTH
|
|
static PRInt32 gNoiseIndent = 0;
|
|
#endif
|
|
|
|
/* static */ nscoord
|
|
nsLayoutUtils::IntrinsicForContainer(nsRenderingContext *aRenderingContext,
|
|
nsIFrame *aFrame,
|
|
IntrinsicWidthType aType)
|
|
{
|
|
NS_PRECONDITION(aFrame, "null frame");
|
|
NS_PRECONDITION(aType == MIN_WIDTH || aType == PREF_WIDTH, "bad type");
|
|
|
|
#ifdef DEBUG_INTRINSIC_WIDTH
|
|
nsFrame::IndentBy(stdout, gNoiseIndent);
|
|
static_cast<nsFrame*>(aFrame)->ListTag(stdout);
|
|
printf(" %s intrinsic width for container:\n",
|
|
aType == MIN_WIDTH ? "min" : "pref");
|
|
#endif
|
|
|
|
nsIFrame::IntrinsicWidthOffsetData offsets =
|
|
aFrame->IntrinsicWidthOffsets(aRenderingContext);
|
|
|
|
const nsStylePosition *stylePos = aFrame->GetStylePosition();
|
|
PRUint8 boxSizing = stylePos->mBoxSizing;
|
|
const nsStyleCoord &styleWidth = stylePos->mWidth;
|
|
const nsStyleCoord &styleMinWidth = stylePos->mMinWidth;
|
|
const nsStyleCoord &styleMaxWidth = stylePos->mMaxWidth;
|
|
|
|
// We build up two values starting with the content box, and then
|
|
// adding padding, border and margin. The result is normally
|
|
// |result|. Then, when we handle 'width', 'min-width', and
|
|
// 'max-width', we use the results we've been building in |min| as a
|
|
// minimum, overriding 'min-width'. This ensures two things:
|
|
// * that we don't let a value of 'box-sizing' specifying a width
|
|
// smaller than the padding/border inside the box-sizing box give
|
|
// a content width less than zero
|
|
// * that we prevent tables from becoming smaller than their
|
|
// intrinsic minimum width
|
|
nscoord result = 0, min = 0;
|
|
|
|
nscoord maxw;
|
|
PRBool haveFixedMaxWidth = GetAbsoluteCoord(styleMaxWidth, maxw);
|
|
nscoord minw;
|
|
PRBool haveFixedMinWidth = GetAbsoluteCoord(styleMinWidth, minw);
|
|
|
|
// If we have a specified width (or a specified 'min-width' greater
|
|
// than the specified 'max-width', which works out to the same thing),
|
|
// don't even bother getting the frame's intrinsic width.
|
|
if (styleWidth.GetUnit() == eStyleUnit_Enumerated &&
|
|
(styleWidth.GetIntValue() == NS_STYLE_WIDTH_MAX_CONTENT ||
|
|
styleWidth.GetIntValue() == NS_STYLE_WIDTH_MIN_CONTENT)) {
|
|
// -moz-fit-content and -moz-available enumerated widths compute intrinsic
|
|
// widths just like auto.
|
|
// For -moz-max-content and -moz-min-content, we handle them like
|
|
// specified widths, but ignore -moz-box-sizing.
|
|
boxSizing = NS_STYLE_BOX_SIZING_CONTENT;
|
|
} else if (styleWidth.GetUnit() != eStyleUnit_Coord &&
|
|
!(haveFixedMinWidth && haveFixedMaxWidth && maxw <= minw)) {
|
|
#ifdef DEBUG_INTRINSIC_WIDTH
|
|
++gNoiseIndent;
|
|
#endif
|
|
if (aType == MIN_WIDTH)
|
|
result = aFrame->GetMinWidth(aRenderingContext);
|
|
else
|
|
result = aFrame->GetPrefWidth(aRenderingContext);
|
|
#ifdef DEBUG_INTRINSIC_WIDTH
|
|
--gNoiseIndent;
|
|
nsFrame::IndentBy(stdout, gNoiseIndent);
|
|
static_cast<nsFrame*>(aFrame)->ListTag(stdout);
|
|
printf(" %s intrinsic width from frame is %d.\n",
|
|
aType == MIN_WIDTH ? "min" : "pref", result);
|
|
#endif
|
|
|
|
// Handle elements with an intrinsic ratio (or size) and a specified
|
|
// height, min-height, or max-height.
|
|
const nsStyleCoord &styleHeight = stylePos->mHeight;
|
|
const nsStyleCoord &styleMinHeight = stylePos->mMinHeight;
|
|
const nsStyleCoord &styleMaxHeight = stylePos->mMaxHeight;
|
|
if (styleHeight.GetUnit() != eStyleUnit_Auto ||
|
|
!(styleMinHeight.GetUnit() == eStyleUnit_Coord &&
|
|
styleMinHeight.GetCoordValue() == 0) ||
|
|
styleMaxHeight.GetUnit() != eStyleUnit_None) {
|
|
|
|
nsSize ratio = aFrame->GetIntrinsicRatio();
|
|
|
|
if (ratio.height != 0) {
|
|
|
|
nscoord h;
|
|
if (GetAbsoluteCoord(styleHeight, h) ||
|
|
GetPercentHeight(styleHeight, aFrame, h)) {
|
|
result =
|
|
NSToCoordRound(h * (float(ratio.width) / float(ratio.height)));
|
|
}
|
|
|
|
if (GetAbsoluteCoord(styleMaxHeight, h) ||
|
|
GetPercentHeight(styleMaxHeight, aFrame, h)) {
|
|
h = NSToCoordRound(h * (float(ratio.width) / float(ratio.height)));
|
|
if (h < result)
|
|
result = h;
|
|
}
|
|
|
|
if (GetAbsoluteCoord(styleMinHeight, h) ||
|
|
GetPercentHeight(styleMinHeight, aFrame, h)) {
|
|
h = NSToCoordRound(h * (float(ratio.width) / float(ratio.height)));
|
|
if (h > result)
|
|
result = h;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (aFrame->GetType() == nsGkAtoms::tableFrame) {
|
|
// Tables can't shrink smaller than their intrinsic minimum width,
|
|
// no matter what.
|
|
min = aFrame->GetMinWidth(aRenderingContext);
|
|
}
|
|
|
|
// We also need to track what has been added on outside of the box
|
|
// (controlled by 'box-sizing') where 'width', 'min-width' and
|
|
// 'max-width' are applied. We have to account for these properties
|
|
// after getting all the offsets (margin, border, padding) because
|
|
// percentages do not operate linearly.
|
|
// Doing this is ok because although percentages aren't handled
|
|
// linearly, they are handled monotonically.
|
|
nscoord coordOutsideWidth = offsets.hPadding;
|
|
float pctOutsideWidth = offsets.hPctPadding;
|
|
|
|
float pctTotal = 0.0f;
|
|
|
|
if (boxSizing == NS_STYLE_BOX_SIZING_PADDING) {
|
|
min += coordOutsideWidth;
|
|
result = NSCoordSaturatingAdd(result, coordOutsideWidth);
|
|
pctTotal += pctOutsideWidth;
|
|
|
|
coordOutsideWidth = 0;
|
|
pctOutsideWidth = 0.0f;
|
|
}
|
|
|
|
coordOutsideWidth += offsets.hBorder;
|
|
|
|
if (boxSizing == NS_STYLE_BOX_SIZING_BORDER) {
|
|
min += coordOutsideWidth;
|
|
result = NSCoordSaturatingAdd(result, coordOutsideWidth);
|
|
pctTotal += pctOutsideWidth;
|
|
|
|
coordOutsideWidth = 0;
|
|
pctOutsideWidth = 0.0f;
|
|
}
|
|
|
|
coordOutsideWidth += offsets.hMargin;
|
|
pctOutsideWidth += offsets.hPctMargin;
|
|
|
|
min += coordOutsideWidth;
|
|
result = NSCoordSaturatingAdd(result, coordOutsideWidth);
|
|
pctTotal += pctOutsideWidth;
|
|
|
|
nscoord w;
|
|
if (GetAbsoluteCoord(styleWidth, w) ||
|
|
GetIntrinsicCoord(styleWidth, aRenderingContext, aFrame,
|
|
PROP_WIDTH, w)) {
|
|
result = AddPercents(aType, w + coordOutsideWidth, pctOutsideWidth);
|
|
}
|
|
else if (aType == MIN_WIDTH &&
|
|
// The only cases of coord-percent-calc() units that
|
|
// GetAbsoluteCoord didn't handle are percent and calc()s
|
|
// containing percent.
|
|
styleWidth.IsCoordPercentCalcUnit() &&
|
|
aFrame->IsFrameOfType(nsIFrame::eReplaced)) {
|
|
// A percentage width on replaced elements means they can shrink to 0.
|
|
result = 0; // let |min| handle padding/border/margin
|
|
}
|
|
else {
|
|
// NOTE: We could really do a lot better for percents and for some
|
|
// cases of calc() containing percent (certainly including any where
|
|
// the coefficient on the percent is positive and there are no max()
|
|
// expressions). However, doing better for percents wouldn't be
|
|
// backwards compatible.
|
|
result = AddPercents(aType, result, pctTotal);
|
|
}
|
|
|
|
if (haveFixedMaxWidth ||
|
|
GetIntrinsicCoord(styleMaxWidth, aRenderingContext, aFrame,
|
|
PROP_MAX_WIDTH, maxw)) {
|
|
maxw = AddPercents(aType, maxw + coordOutsideWidth, pctOutsideWidth);
|
|
if (result > maxw)
|
|
result = maxw;
|
|
}
|
|
|
|
if (haveFixedMinWidth ||
|
|
GetIntrinsicCoord(styleMinWidth, aRenderingContext, aFrame,
|
|
PROP_MIN_WIDTH, minw)) {
|
|
minw = AddPercents(aType, minw + coordOutsideWidth, pctOutsideWidth);
|
|
if (result < minw)
|
|
result = minw;
|
|
}
|
|
|
|
min = AddPercents(aType, min, pctTotal);
|
|
if (result < min)
|
|
result = min;
|
|
|
|
const nsStyleDisplay *disp = aFrame->GetStyleDisplay();
|
|
if (aFrame->IsThemed(disp)) {
|
|
nsIntSize size(0, 0);
|
|
PRBool canOverride = PR_TRUE;
|
|
nsPresContext *presContext = aFrame->PresContext();
|
|
presContext->GetTheme()->
|
|
GetMinimumWidgetSize(aRenderingContext, aFrame, disp->mAppearance,
|
|
&size, &canOverride);
|
|
|
|
nscoord themeWidth = presContext->DevPixelsToAppUnits(size.width);
|
|
|
|
// GMWS() returns a border-box width
|
|
themeWidth += offsets.hMargin;
|
|
themeWidth = AddPercents(aType, themeWidth, offsets.hPctMargin);
|
|
|
|
if (themeWidth > result || !canOverride)
|
|
result = themeWidth;
|
|
}
|
|
|
|
#ifdef DEBUG_INTRINSIC_WIDTH
|
|
nsFrame::IndentBy(stdout, gNoiseIndent);
|
|
static_cast<nsFrame*>(aFrame)->ListTag(stdout);
|
|
printf(" %s intrinsic width for container is %d twips.\n",
|
|
aType == MIN_WIDTH ? "min" : "pref", result);
|
|
#endif
|
|
|
|
return result;
|
|
}
|
|
|
|
/* static */ nscoord
|
|
nsLayoutUtils::ComputeWidthDependentValue(
|
|
nscoord aContainingBlockWidth,
|
|
const nsStyleCoord& aCoord)
|
|
{
|
|
NS_WARN_IF_FALSE(aContainingBlockWidth != NS_UNCONSTRAINEDSIZE,
|
|
"have unconstrained width; this should only result from "
|
|
"very large sizes, not attempts at intrinsic width "
|
|
"calculation");
|
|
|
|
if (aCoord.IsCoordPercentCalcUnit()) {
|
|
return nsRuleNode::ComputeCoordPercentCalc(aCoord, aContainingBlockWidth);
|
|
}
|
|
NS_ASSERTION(aCoord.GetUnit() == eStyleUnit_None ||
|
|
aCoord.GetUnit() == eStyleUnit_Auto,
|
|
"unexpected width value");
|
|
return 0;
|
|
}
|
|
|
|
/* static */ nscoord
|
|
nsLayoutUtils::ComputeWidthValue(
|
|
nsRenderingContext* aRenderingContext,
|
|
nsIFrame* aFrame,
|
|
nscoord aContainingBlockWidth,
|
|
nscoord aContentEdgeToBoxSizing,
|
|
nscoord aBoxSizingToMarginEdge,
|
|
const nsStyleCoord& aCoord)
|
|
{
|
|
NS_PRECONDITION(aFrame, "non-null frame expected");
|
|
NS_PRECONDITION(aRenderingContext, "non-null rendering context expected");
|
|
NS_WARN_IF_FALSE(aContainingBlockWidth != NS_UNCONSTRAINEDSIZE,
|
|
"have unconstrained width; this should only result from "
|
|
"very large sizes, not attempts at intrinsic width "
|
|
"calculation");
|
|
NS_PRECONDITION(aContainingBlockWidth >= 0,
|
|
"width less than zero");
|
|
|
|
nscoord result;
|
|
if (aCoord.IsCoordPercentCalcUnit()) {
|
|
result = nsRuleNode::ComputeCoordPercentCalc(aCoord, aContainingBlockWidth);
|
|
// The result of a calc() expression might be less than 0; we
|
|
// should clamp at runtime (below). (Percentages and coords that
|
|
// are less than 0 have already been dropped by the parser.)
|
|
result -= aContentEdgeToBoxSizing;
|
|
} else if (eStyleUnit_Enumerated == aCoord.GetUnit()) {
|
|
PRInt32 val = aCoord.GetIntValue();
|
|
switch (val) {
|
|
case NS_STYLE_WIDTH_MAX_CONTENT:
|
|
result = aFrame->GetPrefWidth(aRenderingContext);
|
|
NS_ASSERTION(result >= 0, "width less than zero");
|
|
break;
|
|
case NS_STYLE_WIDTH_MIN_CONTENT:
|
|
result = aFrame->GetMinWidth(aRenderingContext);
|
|
NS_ASSERTION(result >= 0, "width less than zero");
|
|
break;
|
|
case NS_STYLE_WIDTH_FIT_CONTENT:
|
|
{
|
|
nscoord pref = aFrame->GetPrefWidth(aRenderingContext),
|
|
min = aFrame->GetMinWidth(aRenderingContext),
|
|
fill = aContainingBlockWidth -
|
|
(aBoxSizingToMarginEdge + aContentEdgeToBoxSizing);
|
|
result = NS_MAX(min, NS_MIN(pref, fill));
|
|
NS_ASSERTION(result >= 0, "width less than zero");
|
|
}
|
|
break;
|
|
case NS_STYLE_WIDTH_AVAILABLE:
|
|
result = aContainingBlockWidth -
|
|
(aBoxSizingToMarginEdge + aContentEdgeToBoxSizing);
|
|
}
|
|
} else {
|
|
NS_NOTREACHED("unexpected width value");
|
|
result = 0;
|
|
}
|
|
if (result < 0)
|
|
result = 0;
|
|
return result;
|
|
}
|
|
|
|
|
|
/* static */ nscoord
|
|
nsLayoutUtils::ComputeHeightDependentValue(
|
|
nscoord aContainingBlockHeight,
|
|
const nsStyleCoord& aCoord)
|
|
{
|
|
// XXXldb Some callers explicitly check aContainingBlockHeight
|
|
// against NS_AUTOHEIGHT *and* unit against eStyleUnit_Percent or
|
|
// calc()s containing percents before calling this function.
|
|
// However, it would be much more likely to catch problems without
|
|
// the unit conditions.
|
|
// XXXldb Many callers pass a non-'auto' containing block height when
|
|
// according to CSS2.1 they should be passing 'auto'.
|
|
NS_PRECONDITION(NS_AUTOHEIGHT != aContainingBlockHeight ||
|
|
!aCoord.HasPercent(),
|
|
"unexpected containing block height");
|
|
|
|
if (aCoord.IsCoordPercentCalcUnit()) {
|
|
return nsRuleNode::ComputeCoordPercentCalc(aCoord, aContainingBlockHeight);
|
|
}
|
|
|
|
NS_ASSERTION(aCoord.GetUnit() == eStyleUnit_None ||
|
|
aCoord.GetUnit() == eStyleUnit_Auto,
|
|
"unexpected height value");
|
|
return 0;
|
|
}
|
|
|
|
#define MULDIV(a,b,c) (nscoord(PRInt64(a) * PRInt64(b) / PRInt64(c)))
|
|
|
|
/* static */ nsSize
|
|
nsLayoutUtils::ComputeSizeWithIntrinsicDimensions(
|
|
nsRenderingContext* aRenderingContext, nsIFrame* aFrame,
|
|
const nsIFrame::IntrinsicSize& aIntrinsicSize,
|
|
nsSize aIntrinsicRatio, nsSize aCBSize,
|
|
nsSize aMargin, nsSize aBorder, nsSize aPadding)
|
|
{
|
|
const nsStylePosition *stylePos = aFrame->GetStylePosition();
|
|
// Handle intrinsic sizes and their interaction with
|
|
// {min-,max-,}{width,height} according to the rules in
|
|
// http://www.w3.org/TR/CSS21/visudet.html#min-max-widths
|
|
|
|
// Note: throughout the following section of the function, I avoid
|
|
// a * (b / c) because of its reduced accuracy relative to a * b / c
|
|
// or (a * b) / c (which are equivalent).
|
|
|
|
const PRBool isAutoWidth = stylePos->mWidth.GetUnit() == eStyleUnit_Auto;
|
|
const PRBool isAutoHeight = IsAutoHeight(stylePos->mHeight, aCBSize.height);
|
|
|
|
nsSize boxSizingAdjust(0,0);
|
|
switch (stylePos->mBoxSizing) {
|
|
case NS_STYLE_BOX_SIZING_BORDER:
|
|
boxSizingAdjust += aBorder;
|
|
// fall through
|
|
case NS_STYLE_BOX_SIZING_PADDING:
|
|
boxSizingAdjust += aPadding;
|
|
}
|
|
nscoord boxSizingToMarginEdgeWidth =
|
|
aMargin.width + aBorder.width + aPadding.width - boxSizingAdjust.width;
|
|
|
|
nscoord width, minWidth, maxWidth, height, minHeight, maxHeight;
|
|
|
|
if (!isAutoWidth) {
|
|
width = nsLayoutUtils::ComputeWidthValue(aRenderingContext,
|
|
aFrame, aCBSize.width, boxSizingAdjust.width,
|
|
boxSizingToMarginEdgeWidth, stylePos->mWidth);
|
|
NS_ASSERTION(width >= 0, "negative result from ComputeWidthValue");
|
|
}
|
|
|
|
if (stylePos->mMaxWidth.GetUnit() != eStyleUnit_None) {
|
|
maxWidth = nsLayoutUtils::ComputeWidthValue(aRenderingContext,
|
|
aFrame, aCBSize.width, boxSizingAdjust.width,
|
|
boxSizingToMarginEdgeWidth, stylePos->mMaxWidth);
|
|
NS_ASSERTION(maxWidth >= 0, "negative result from ComputeWidthValue");
|
|
} else {
|
|
maxWidth = nscoord_MAX;
|
|
}
|
|
|
|
minWidth = nsLayoutUtils::ComputeWidthValue(aRenderingContext,
|
|
aFrame, aCBSize.width, boxSizingAdjust.width,
|
|
boxSizingToMarginEdgeWidth, stylePos->mMinWidth);
|
|
NS_ASSERTION(minWidth >= 0, "negative result from ComputeWidthValue");
|
|
|
|
if (!isAutoHeight) {
|
|
height = nsLayoutUtils::
|
|
ComputeHeightValue(aCBSize.height, stylePos->mHeight) -
|
|
boxSizingAdjust.height;
|
|
if (height < 0)
|
|
height = 0;
|
|
}
|
|
|
|
if (!IsAutoHeight(stylePos->mMaxHeight, aCBSize.height)) {
|
|
maxHeight = nsLayoutUtils::
|
|
ComputeHeightValue(aCBSize.height, stylePos->mMaxHeight) -
|
|
boxSizingAdjust.height;
|
|
if (maxHeight < 0)
|
|
maxHeight = 0;
|
|
} else {
|
|
maxHeight = nscoord_MAX;
|
|
}
|
|
|
|
if (!IsAutoHeight(stylePos->mMinHeight, aCBSize.height)) {
|
|
minHeight = nsLayoutUtils::
|
|
ComputeHeightValue(aCBSize.height, stylePos->mMinHeight) -
|
|
boxSizingAdjust.height;
|
|
if (minHeight < 0)
|
|
minHeight = 0;
|
|
} else {
|
|
minHeight = 0;
|
|
}
|
|
|
|
// Resolve percentage intrinsic width/height as necessary:
|
|
|
|
NS_ASSERTION(aCBSize.width != NS_UNCONSTRAINEDSIZE,
|
|
"Our containing block must not have unconstrained width!");
|
|
|
|
PRBool hasIntrinsicWidth, hasIntrinsicHeight;
|
|
nscoord intrinsicWidth, intrinsicHeight;
|
|
|
|
if (aIntrinsicSize.width.GetUnit() == eStyleUnit_Coord) {
|
|
hasIntrinsicWidth = PR_TRUE;
|
|
intrinsicWidth = aIntrinsicSize.width.GetCoordValue();
|
|
if (intrinsicWidth < 0)
|
|
intrinsicWidth = 0;
|
|
} else {
|
|
NS_ASSERTION(aIntrinsicSize.width.GetUnit() == eStyleUnit_None,
|
|
"unexpected unit");
|
|
hasIntrinsicWidth = PR_FALSE;
|
|
intrinsicWidth = 0;
|
|
}
|
|
|
|
if (aIntrinsicSize.height.GetUnit() == eStyleUnit_Coord) {
|
|
hasIntrinsicHeight = PR_TRUE;
|
|
intrinsicHeight = aIntrinsicSize.height.GetCoordValue();
|
|
if (intrinsicHeight < 0)
|
|
intrinsicHeight = 0;
|
|
} else {
|
|
NS_ASSERTION(aIntrinsicSize.height.GetUnit() == eStyleUnit_None,
|
|
"unexpected unit");
|
|
hasIntrinsicHeight = PR_FALSE;
|
|
intrinsicHeight = 0;
|
|
}
|
|
|
|
NS_ASSERTION(aIntrinsicRatio.width >= 0 && aIntrinsicRatio.height >= 0,
|
|
"Intrinsic ratio has a negative component!");
|
|
|
|
// Now calculate the used values for width and height:
|
|
|
|
if (isAutoWidth) {
|
|
if (isAutoHeight) {
|
|
|
|
// 'auto' width, 'auto' height
|
|
|
|
// Get tentative values - CSS 2.1 sections 10.3.2 and 10.6.2:
|
|
|
|
nscoord tentWidth, tentHeight;
|
|
|
|
if (hasIntrinsicWidth) {
|
|
tentWidth = intrinsicWidth;
|
|
} else if (hasIntrinsicHeight && aIntrinsicRatio.height > 0) {
|
|
tentWidth = MULDIV(intrinsicHeight, aIntrinsicRatio.width, aIntrinsicRatio.height);
|
|
} else if (aIntrinsicRatio.width > 0) {
|
|
tentWidth = aCBSize.width - boxSizingToMarginEdgeWidth; // XXX scrollbar?
|
|
if (tentWidth < 0) tentWidth = 0;
|
|
} else {
|
|
tentWidth = nsPresContext::CSSPixelsToAppUnits(300);
|
|
}
|
|
|
|
if (hasIntrinsicHeight) {
|
|
tentHeight = intrinsicHeight;
|
|
} else if (aIntrinsicRatio.width > 0) {
|
|
tentHeight = MULDIV(tentWidth, aIntrinsicRatio.height, aIntrinsicRatio.width);
|
|
} else {
|
|
tentHeight = nsPresContext::CSSPixelsToAppUnits(150);
|
|
}
|
|
|
|
return ComputeAutoSizeWithIntrinsicDimensions(minWidth, minHeight,
|
|
maxWidth, maxHeight,
|
|
tentWidth, tentHeight);
|
|
} else {
|
|
|
|
// 'auto' width, non-'auto' height
|
|
height = NS_CSS_MINMAX(height, minHeight, maxHeight);
|
|
if (aIntrinsicRatio.height > 0) {
|
|
width = MULDIV(height, aIntrinsicRatio.width, aIntrinsicRatio.height);
|
|
} else if (hasIntrinsicWidth) {
|
|
width = intrinsicWidth;
|
|
} else {
|
|
width = nsPresContext::CSSPixelsToAppUnits(300);
|
|
}
|
|
width = NS_CSS_MINMAX(width, minWidth, maxWidth);
|
|
|
|
}
|
|
} else {
|
|
if (isAutoHeight) {
|
|
|
|
// non-'auto' width, 'auto' height
|
|
width = NS_CSS_MINMAX(width, minWidth, maxWidth);
|
|
if (aIntrinsicRatio.width > 0) {
|
|
height = MULDIV(width, aIntrinsicRatio.height, aIntrinsicRatio.width);
|
|
} else if (hasIntrinsicHeight) {
|
|
height = intrinsicHeight;
|
|
} else {
|
|
height = nsPresContext::CSSPixelsToAppUnits(150);
|
|
}
|
|
height = NS_CSS_MINMAX(height, minHeight, maxHeight);
|
|
|
|
} else {
|
|
|
|
// non-'auto' width, non-'auto' height
|
|
width = NS_CSS_MINMAX(width, minWidth, maxWidth);
|
|
height = NS_CSS_MINMAX(height, minHeight, maxHeight);
|
|
|
|
}
|
|
}
|
|
|
|
return nsSize(width, height);
|
|
}
|
|
|
|
nsSize
|
|
nsLayoutUtils::ComputeAutoSizeWithIntrinsicDimensions(nscoord minWidth, nscoord minHeight,
|
|
nscoord maxWidth, nscoord maxHeight,
|
|
nscoord tentWidth, nscoord tentHeight)
|
|
{
|
|
// Now apply min/max-width/height - CSS 2.1 sections 10.4 and 10.7:
|
|
|
|
if (minWidth > maxWidth)
|
|
maxWidth = minWidth;
|
|
if (minHeight > maxHeight)
|
|
maxHeight = minHeight;
|
|
|
|
nscoord heightAtMaxWidth, heightAtMinWidth,
|
|
widthAtMaxHeight, widthAtMinHeight;
|
|
|
|
if (tentWidth > 0) {
|
|
heightAtMaxWidth = MULDIV(maxWidth, tentHeight, tentWidth);
|
|
if (heightAtMaxWidth < minHeight)
|
|
heightAtMaxWidth = minHeight;
|
|
heightAtMinWidth = MULDIV(minWidth, tentHeight, tentWidth);
|
|
if (heightAtMinWidth > maxHeight)
|
|
heightAtMinWidth = maxHeight;
|
|
} else {
|
|
heightAtMaxWidth = tentHeight;
|
|
heightAtMinWidth = tentHeight;
|
|
}
|
|
|
|
if (tentHeight > 0) {
|
|
widthAtMaxHeight = MULDIV(maxHeight, tentWidth, tentHeight);
|
|
if (widthAtMaxHeight < minWidth)
|
|
widthAtMaxHeight = minWidth;
|
|
widthAtMinHeight = MULDIV(minHeight, tentWidth, tentHeight);
|
|
if (widthAtMinHeight > maxWidth)
|
|
widthAtMinHeight = maxWidth;
|
|
} else {
|
|
widthAtMaxHeight = tentWidth;
|
|
widthAtMinHeight = tentWidth;
|
|
}
|
|
|
|
// The table at http://www.w3.org/TR/CSS21/visudet.html#min-max-widths :
|
|
|
|
nscoord width, height;
|
|
|
|
if (tentWidth > maxWidth) {
|
|
if (tentHeight > maxHeight) {
|
|
if (PRInt64(maxWidth) * PRInt64(tentHeight) <=
|
|
PRInt64(maxHeight) * PRInt64(tentWidth)) {
|
|
width = maxWidth;
|
|
height = heightAtMaxWidth;
|
|
} else {
|
|
width = widthAtMaxHeight;
|
|
height = maxHeight;
|
|
}
|
|
} else {
|
|
// This also covers "(w > max-width) and (h < min-height)" since in
|
|
// that case (max-width/w < 1), and with (h < min-height):
|
|
// max(max-width * h/w, min-height) == min-height
|
|
width = maxWidth;
|
|
height = heightAtMaxWidth;
|
|
}
|
|
} else if (tentWidth < minWidth) {
|
|
if (tentHeight < minHeight) {
|
|
if (PRInt64(minWidth) * PRInt64(tentHeight) <=
|
|
PRInt64(minHeight) * PRInt64(tentWidth)) {
|
|
width = widthAtMinHeight;
|
|
height = minHeight;
|
|
} else {
|
|
width = minWidth;
|
|
height = heightAtMinWidth;
|
|
}
|
|
} else {
|
|
// This also covers "(w < min-width) and (h > max-height)" since in
|
|
// that case (min-width/w > 1), and with (h > max-height):
|
|
// min(min-width * h/w, max-height) == max-height
|
|
width = minWidth;
|
|
height = heightAtMinWidth;
|
|
}
|
|
} else {
|
|
if (tentHeight > maxHeight) {
|
|
width = widthAtMaxHeight;
|
|
height = maxHeight;
|
|
} else if (tentHeight < minHeight) {
|
|
width = widthAtMinHeight;
|
|
height = minHeight;
|
|
} else {
|
|
width = tentWidth;
|
|
height = tentHeight;
|
|
}
|
|
}
|
|
|
|
return nsSize(width, height);
|
|
}
|
|
|
|
/* static */ nscoord
|
|
nsLayoutUtils::MinWidthFromInline(nsIFrame* aFrame,
|
|
nsRenderingContext* aRenderingContext)
|
|
{
|
|
nsIFrame::InlineMinWidthData data;
|
|
DISPLAY_MIN_WIDTH(aFrame, data.prevLines);
|
|
aFrame->AddInlineMinWidth(aRenderingContext, &data);
|
|
data.ForceBreak(aRenderingContext);
|
|
return data.prevLines;
|
|
}
|
|
|
|
/* static */ nscoord
|
|
nsLayoutUtils::PrefWidthFromInline(nsIFrame* aFrame,
|
|
nsRenderingContext* aRenderingContext)
|
|
{
|
|
nsIFrame::InlinePrefWidthData data;
|
|
DISPLAY_PREF_WIDTH(aFrame, data.prevLines);
|
|
aFrame->AddInlinePrefWidth(aRenderingContext, &data);
|
|
data.ForceBreak(aRenderingContext);
|
|
return data.prevLines;
|
|
}
|
|
|
|
static nscolor
|
|
DarkenColor(nscolor aColor)
|
|
{
|
|
PRUint16 hue, sat, value;
|
|
PRUint8 alpha;
|
|
|
|
// convert the RBG to HSV so we can get the lightness (which is the v)
|
|
NS_RGB2HSV(aColor, hue, sat, value, alpha);
|
|
|
|
// The goal here is to send white to black while letting colored
|
|
// stuff stay colored... So we adopt the following approach.
|
|
// Something with sat = 0 should end up with value = 0. Something
|
|
// with a high sat can end up with a high value and it's ok.... At
|
|
// the same time, we don't want to make things lighter. Do
|
|
// something simple, since it seems to work.
|
|
if (value > sat) {
|
|
value = sat;
|
|
// convert this color back into the RGB color space.
|
|
NS_HSV2RGB(aColor, hue, sat, value, alpha);
|
|
}
|
|
return aColor;
|
|
}
|
|
|
|
// Check whether we should darken text/decoration colors. We need to do this if
|
|
// background images and colors are being suppressed, because that means
|
|
// light text will not be visible against the (presumed light-colored) background.
|
|
static PRBool
|
|
ShouldDarkenColors(nsPresContext* aPresContext)
|
|
{
|
|
return !aPresContext->GetBackgroundColorDraw() &&
|
|
!aPresContext->GetBackgroundImageDraw();
|
|
}
|
|
|
|
nscolor
|
|
nsLayoutUtils::GetColor(nsIFrame* aFrame, nsCSSProperty aProperty)
|
|
{
|
|
nscolor color = aFrame->GetVisitedDependentColor(aProperty);
|
|
if (ShouldDarkenColors(aFrame->PresContext())) {
|
|
color = DarkenColor(color);
|
|
}
|
|
return color;
|
|
}
|
|
|
|
gfxFloat
|
|
nsLayoutUtils::GetSnappedBaselineY(nsIFrame* aFrame, gfxContext* aContext,
|
|
nscoord aY, nscoord aAscent)
|
|
{
|
|
gfxFloat appUnitsPerDevUnit = aFrame->PresContext()->AppUnitsPerDevPixel();
|
|
gfxFloat baseline = gfxFloat(aY) + aAscent;
|
|
gfxRect putativeRect(0, baseline/appUnitsPerDevUnit, 1, 1);
|
|
if (!aContext->UserToDevicePixelSnapped(putativeRect, PR_TRUE))
|
|
return baseline;
|
|
return aContext->DeviceToUser(putativeRect.TopLeft()).y * appUnitsPerDevUnit;
|
|
}
|
|
|
|
void
|
|
nsLayoutUtils::DrawString(const nsIFrame* aFrame,
|
|
nsRenderingContext* aContext,
|
|
const PRUnichar* aString,
|
|
PRInt32 aLength,
|
|
nsPoint aPoint,
|
|
PRUint8 aDirection)
|
|
{
|
|
#ifdef IBMBIDI
|
|
nsresult rv = NS_ERROR_FAILURE;
|
|
nsPresContext* presContext = aFrame->PresContext();
|
|
if (presContext->BidiEnabled()) {
|
|
if (aDirection == NS_STYLE_DIRECTION_INHERIT) {
|
|
aDirection = aFrame->GetStyleVisibility()->mDirection;
|
|
}
|
|
nsBidiDirection direction =
|
|
(NS_STYLE_DIRECTION_RTL == aDirection) ?
|
|
NSBIDI_RTL : NSBIDI_LTR;
|
|
rv = nsBidiPresUtils::RenderText(aString, aLength, direction,
|
|
presContext, *aContext, *aContext,
|
|
aPoint.x, aPoint.y);
|
|
}
|
|
if (NS_FAILED(rv))
|
|
#endif // IBMBIDI
|
|
{
|
|
aContext->SetTextRunRTL(PR_FALSE);
|
|
aContext->DrawString(aString, aLength, aPoint.x, aPoint.y);
|
|
}
|
|
}
|
|
|
|
nscoord
|
|
nsLayoutUtils::GetStringWidth(const nsIFrame* aFrame,
|
|
nsRenderingContext* aContext,
|
|
const PRUnichar* aString,
|
|
PRInt32 aLength)
|
|
{
|
|
#ifdef IBMBIDI
|
|
nsPresContext* presContext = aFrame->PresContext();
|
|
if (presContext->BidiEnabled()) {
|
|
const nsStyleVisibility* vis = aFrame->GetStyleVisibility();
|
|
nsBidiDirection direction =
|
|
(NS_STYLE_DIRECTION_RTL == vis->mDirection) ?
|
|
NSBIDI_RTL : NSBIDI_LTR;
|
|
return nsBidiPresUtils::MeasureTextWidth(aString, aLength,
|
|
direction, presContext, *aContext);
|
|
}
|
|
#endif // IBMBIDI
|
|
aContext->SetTextRunRTL(PR_FALSE);
|
|
return aContext->GetWidth(aString, aLength);
|
|
}
|
|
|
|
/* static */ void
|
|
nsLayoutUtils::PaintTextShadow(const nsIFrame* aFrame,
|
|
nsRenderingContext* aContext,
|
|
const nsRect& aTextRect,
|
|
const nsRect& aDirtyRect,
|
|
const nscolor& aForegroundColor,
|
|
TextShadowCallback aCallback,
|
|
void* aCallbackData)
|
|
{
|
|
const nsStyleText* textStyle = aFrame->GetStyleText();
|
|
if (!textStyle->mTextShadow)
|
|
return;
|
|
|
|
// Text shadow happens with the last value being painted at the back,
|
|
// ie. it is painted first.
|
|
gfxContext* aDestCtx = aContext->ThebesContext();
|
|
for (PRUint32 i = textStyle->mTextShadow->Length(); i > 0; --i) {
|
|
nsCSSShadowItem* shadowDetails = textStyle->mTextShadow->ShadowAt(i - 1);
|
|
nsPoint shadowOffset(shadowDetails->mXOffset,
|
|
shadowDetails->mYOffset);
|
|
nscoord blurRadius = NS_MAX(shadowDetails->mRadius, 0);
|
|
|
|
nsRect shadowRect(aTextRect);
|
|
shadowRect.MoveBy(shadowOffset);
|
|
|
|
nsPresContext* presCtx = aFrame->PresContext();
|
|
nsContextBoxBlur contextBoxBlur;
|
|
gfxContext* shadowContext = contextBoxBlur.Init(shadowRect, 0, blurRadius,
|
|
presCtx->AppUnitsPerDevPixel(),
|
|
aDestCtx, aDirtyRect, nsnull);
|
|
if (!shadowContext)
|
|
continue;
|
|
|
|
nscolor shadowColor;
|
|
if (shadowDetails->mHasColor)
|
|
shadowColor = shadowDetails->mColor;
|
|
else
|
|
shadowColor = aForegroundColor;
|
|
|
|
// Conjure an nsRenderingContext from a gfxContext for drawing the text
|
|
// to blur.
|
|
nsRefPtr<nsRenderingContext> renderingContext = new nsRenderingContext();
|
|
renderingContext->Init(presCtx->DeviceContext(), shadowContext);
|
|
|
|
aDestCtx->Save();
|
|
aDestCtx->NewPath();
|
|
aDestCtx->SetColor(gfxRGBA(shadowColor));
|
|
|
|
// The callback will draw whatever we want to blur as a shadow.
|
|
aCallback(renderingContext, shadowOffset, shadowColor, aCallbackData);
|
|
|
|
contextBoxBlur.DoPaint();
|
|
aDestCtx->Restore();
|
|
}
|
|
}
|
|
|
|
/* static */ nscoord
|
|
nsLayoutUtils::GetCenteredFontBaseline(nsFontMetrics* aFontMetrics,
|
|
nscoord aLineHeight)
|
|
{
|
|
nscoord fontAscent = aFontMetrics->MaxAscent();
|
|
nscoord fontHeight = aFontMetrics->MaxHeight();
|
|
|
|
nscoord leading = aLineHeight - fontHeight;
|
|
return fontAscent + leading/2;
|
|
}
|
|
|
|
|
|
/* static */ PRBool
|
|
nsLayoutUtils::GetFirstLineBaseline(const nsIFrame* aFrame, nscoord* aResult)
|
|
{
|
|
LinePosition position;
|
|
if (!GetFirstLinePosition(aFrame, &position))
|
|
return PR_FALSE;
|
|
*aResult = position.mBaseline;
|
|
return PR_TRUE;
|
|
}
|
|
|
|
/* static */ PRBool
|
|
nsLayoutUtils::GetFirstLinePosition(const nsIFrame* aFrame,
|
|
LinePosition* aResult)
|
|
{
|
|
const nsBlockFrame* block = nsLayoutUtils::GetAsBlock(const_cast<nsIFrame*>(aFrame));
|
|
if (!block) {
|
|
// For the first-line baseline we also have to check for a table, and if
|
|
// so, use the baseline of its first row.
|
|
nsIAtom* fType = aFrame->GetType();
|
|
if (fType == nsGkAtoms::tableOuterFrame) {
|
|
aResult->mTop = 0;
|
|
aResult->mBaseline = aFrame->GetBaseline();
|
|
// This is what we want for the list bullet caller; not sure if
|
|
// other future callers will want the same.
|
|
aResult->mBottom = aFrame->GetSize().height;
|
|
return PR_TRUE;
|
|
}
|
|
|
|
// For first-line baselines, we have to consider scroll frames.
|
|
if (fType == nsGkAtoms::scrollFrame) {
|
|
nsIScrollableFrame *sFrame = do_QueryFrame(const_cast<nsIFrame*>(aFrame));
|
|
if (!sFrame) {
|
|
NS_NOTREACHED("not scroll frame");
|
|
}
|
|
LinePosition kidPosition;
|
|
if (GetFirstLinePosition(sFrame->GetScrolledFrame(), &kidPosition)) {
|
|
// Consider only the border and padding that contributes to the
|
|
// kid's position, not the scrolling, so we get the initial
|
|
// position.
|
|
*aResult = kidPosition + aFrame->GetUsedBorderAndPadding().top;
|
|
return PR_TRUE;
|
|
}
|
|
return PR_FALSE;
|
|
}
|
|
|
|
if (fType == nsGkAtoms::fieldSetFrame) {
|
|
LinePosition kidPosition;
|
|
nsIFrame* kid = aFrame->GetFirstChild(nsnull);
|
|
// kid might be a legend frame here, but that's ok.
|
|
if (GetFirstLinePosition(kid, &kidPosition)) {
|
|
*aResult = kidPosition + kid->GetPosition().y;
|
|
return PR_TRUE;
|
|
}
|
|
return PR_FALSE;
|
|
}
|
|
|
|
// No baseline.
|
|
return PR_FALSE;
|
|
}
|
|
|
|
for (nsBlockFrame::const_line_iterator line = block->begin_lines(),
|
|
line_end = block->end_lines();
|
|
line != line_end; ++line) {
|
|
if (line->IsBlock()) {
|
|
nsIFrame *kid = line->mFirstChild;
|
|
LinePosition kidPosition;
|
|
if (GetFirstLinePosition(kid, &kidPosition)) {
|
|
*aResult = kidPosition + kid->GetPosition().y;
|
|
return PR_TRUE;
|
|
}
|
|
} else {
|
|
// XXX Is this the right test? We have some bogus empty lines
|
|
// floating around, but IsEmpty is perhaps too weak.
|
|
if (line->GetHeight() != 0 || !line->IsEmpty()) {
|
|
nscoord top = line->mBounds.y;
|
|
aResult->mTop = top;
|
|
aResult->mBaseline = top + line->GetAscent();
|
|
aResult->mBottom = top + line->GetHeight();
|
|
return PR_TRUE;
|
|
}
|
|
}
|
|
}
|
|
return PR_FALSE;
|
|
}
|
|
|
|
/* static */ PRBool
|
|
nsLayoutUtils::GetLastLineBaseline(const nsIFrame* aFrame, nscoord* aResult)
|
|
{
|
|
const nsBlockFrame* block = nsLayoutUtils::GetAsBlock(const_cast<nsIFrame*>(aFrame));
|
|
if (!block)
|
|
// No baseline. (We intentionally don't descend into scroll frames.)
|
|
return PR_FALSE;
|
|
|
|
for (nsBlockFrame::const_reverse_line_iterator line = block->rbegin_lines(),
|
|
line_end = block->rend_lines();
|
|
line != line_end; ++line) {
|
|
if (line->IsBlock()) {
|
|
nsIFrame *kid = line->mFirstChild;
|
|
nscoord kidBaseline;
|
|
if (GetLastLineBaseline(kid, &kidBaseline)) {
|
|
*aResult = kidBaseline + kid->GetPosition().y;
|
|
return PR_TRUE;
|
|
} else if (kid->GetType() == nsGkAtoms::scrollFrame) {
|
|
// Use the bottom of the scroll frame.
|
|
// XXX CSS2.1 really doesn't say what to do here.
|
|
*aResult = kid->GetRect().YMost();
|
|
return PR_TRUE;
|
|
}
|
|
} else {
|
|
// XXX Is this the right test? We have some bogus empty lines
|
|
// floating around, but IsEmpty is perhaps too weak.
|
|
if (line->GetHeight() != 0 || !line->IsEmpty()) {
|
|
*aResult = line->mBounds.y + line->GetAscent();
|
|
return PR_TRUE;
|
|
}
|
|
}
|
|
}
|
|
return PR_FALSE;
|
|
}
|
|
|
|
static nscoord
|
|
CalculateBlockContentBottom(nsBlockFrame* aFrame)
|
|
{
|
|
NS_PRECONDITION(aFrame, "null ptr");
|
|
|
|
nscoord contentBottom = 0;
|
|
|
|
for (nsBlockFrame::line_iterator line = aFrame->begin_lines(),
|
|
line_end = aFrame->end_lines();
|
|
line != line_end; ++line) {
|
|
if (line->IsBlock()) {
|
|
nsIFrame* child = line->mFirstChild;
|
|
nscoord offset = child->GetRect().y - child->GetRelativeOffset().y;
|
|
contentBottom = NS_MAX(contentBottom,
|
|
nsLayoutUtils::CalculateContentBottom(child) + offset);
|
|
}
|
|
else {
|
|
contentBottom = NS_MAX(contentBottom, line->mBounds.YMost());
|
|
}
|
|
}
|
|
return contentBottom;
|
|
}
|
|
|
|
/* static */ nscoord
|
|
nsLayoutUtils::CalculateContentBottom(nsIFrame* aFrame)
|
|
{
|
|
NS_PRECONDITION(aFrame, "null ptr");
|
|
|
|
nscoord contentBottom = aFrame->GetRect().height;
|
|
|
|
// We want scrollable overflow rather than visual because this
|
|
// calculation is intended to affect layout.
|
|
if (aFrame->GetScrollableOverflowRect().height > contentBottom) {
|
|
nsBlockFrame* blockFrame = GetAsBlock(aFrame);
|
|
nsIAtom* childList = nsnull;
|
|
PRIntn nextListID = 0;
|
|
do {
|
|
if (childList == nsnull && blockFrame) {
|
|
contentBottom = NS_MAX(contentBottom, CalculateBlockContentBottom(blockFrame));
|
|
}
|
|
else if (childList != nsGkAtoms::overflowList &&
|
|
childList != nsGkAtoms::excessOverflowContainersList &&
|
|
childList != nsGkAtoms::overflowOutOfFlowList)
|
|
{
|
|
for (nsIFrame* child = aFrame->GetFirstChild(childList);
|
|
child; child = child->GetNextSibling())
|
|
{
|
|
nscoord offset = child->GetRect().y - child->GetRelativeOffset().y;
|
|
contentBottom = NS_MAX(contentBottom,
|
|
CalculateContentBottom(child) + offset);
|
|
}
|
|
}
|
|
|
|
childList = aFrame->GetAdditionalChildListName(nextListID);
|
|
nextListID++;
|
|
} while (childList);
|
|
}
|
|
|
|
return contentBottom;
|
|
}
|
|
|
|
/* static */ nsIFrame*
|
|
nsLayoutUtils::GetClosestLayer(nsIFrame* aFrame)
|
|
{
|
|
nsIFrame* layer;
|
|
for (layer = aFrame; layer; layer = layer->GetParent()) {
|
|
if (layer->GetStyleDisplay()->IsPositioned() ||
|
|
(layer->GetParent() &&
|
|
layer->GetParent()->GetType() == nsGkAtoms::scrollFrame))
|
|
break;
|
|
}
|
|
if (layer)
|
|
return layer;
|
|
return aFrame->PresContext()->PresShell()->FrameManager()->GetRootFrame();
|
|
}
|
|
|
|
GraphicsFilter
|
|
nsLayoutUtils::GetGraphicsFilterForFrame(nsIFrame* aForFrame)
|
|
{
|
|
GraphicsFilter defaultFilter = gfxPattern::FILTER_GOOD;
|
|
nsIFrame *frame = nsCSSRendering::IsCanvasFrame(aForFrame) ?
|
|
nsCSSRendering::FindBackgroundStyleFrame(aForFrame) : aForFrame;
|
|
|
|
switch (frame->GetStyleSVG()->mImageRendering) {
|
|
case NS_STYLE_IMAGE_RENDERING_OPTIMIZESPEED:
|
|
return gfxPattern::FILTER_FAST;
|
|
case NS_STYLE_IMAGE_RENDERING_OPTIMIZEQUALITY:
|
|
return gfxPattern::FILTER_BEST;
|
|
case NS_STYLE_IMAGE_RENDERING_CRISPEDGES:
|
|
return gfxPattern::FILTER_NEAREST;
|
|
default:
|
|
return defaultFilter;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Given an image being drawn into an appunit coordinate system, and
|
|
* a point in that coordinate system, map the point back into image
|
|
* pixel space.
|
|
* @param aSize the size of the image, in pixels
|
|
* @param aDest the rectangle that the image is being mapped into
|
|
* @param aPt a point in the same coordinate system as the rectangle
|
|
*/
|
|
static gfxPoint
|
|
MapToFloatImagePixels(const gfxSize& aSize,
|
|
const gfxRect& aDest, const gfxPoint& aPt)
|
|
{
|
|
return gfxPoint(((aPt.x - aDest.X())*aSize.width)/aDest.Width(),
|
|
((aPt.y - aDest.Y())*aSize.height)/aDest.Height());
|
|
}
|
|
|
|
/**
|
|
* Given an image being drawn into an pixel-based coordinate system, and
|
|
* a point in image space, map the point into the pixel-based coordinate
|
|
* system.
|
|
* @param aSize the size of the image, in pixels
|
|
* @param aDest the rectangle that the image is being mapped into
|
|
* @param aPt a point in image space
|
|
*/
|
|
static gfxPoint
|
|
MapToFloatUserPixels(const gfxSize& aSize,
|
|
const gfxRect& aDest, const gfxPoint& aPt)
|
|
{
|
|
return gfxPoint(aPt.x*aDest.Width()/aSize.width + aDest.X(),
|
|
aPt.y*aDest.Height()/aSize.height + aDest.Y());
|
|
}
|
|
|
|
/* static */ gfxRect
|
|
nsLayoutUtils::RectToGfxRect(const nsRect& aRect, PRInt32 aAppUnitsPerDevPixel)
|
|
{
|
|
return gfxRect(gfxFloat(aRect.x) / aAppUnitsPerDevPixel,
|
|
gfxFloat(aRect.y) / aAppUnitsPerDevPixel,
|
|
gfxFloat(aRect.width) / aAppUnitsPerDevPixel,
|
|
gfxFloat(aRect.height) / aAppUnitsPerDevPixel);
|
|
}
|
|
|
|
struct SnappedImageDrawingParameters {
|
|
// A transform from either device space or user space (depending on mResetCTM)
|
|
// to image space
|
|
gfxMatrix mUserSpaceToImageSpace;
|
|
// A device-space, pixel-aligned rectangle to fill
|
|
gfxRect mFillRect;
|
|
// A pixel rectangle in tiled image space outside of which gfx should not
|
|
// sample (using EXTEND_PAD as necessary)
|
|
nsIntRect mSubimage;
|
|
// Whether there's anything to draw at all
|
|
PRPackedBool mShouldDraw;
|
|
// PR_TRUE iff the CTM of the rendering context needs to be reset to the
|
|
// identity matrix before drawing
|
|
PRPackedBool mResetCTM;
|
|
|
|
SnappedImageDrawingParameters()
|
|
: mShouldDraw(PR_FALSE)
|
|
, mResetCTM(PR_FALSE)
|
|
{}
|
|
|
|
SnappedImageDrawingParameters(const gfxMatrix& aUserSpaceToImageSpace,
|
|
const gfxRect& aFillRect,
|
|
const nsIntRect& aSubimage,
|
|
PRBool aResetCTM)
|
|
: mUserSpaceToImageSpace(aUserSpaceToImageSpace)
|
|
, mFillRect(aFillRect)
|
|
, mSubimage(aSubimage)
|
|
, mShouldDraw(PR_TRUE)
|
|
, mResetCTM(aResetCTM)
|
|
{}
|
|
};
|
|
|
|
/**
|
|
* Given a set of input parameters, compute certain output parameters
|
|
* for drawing an image with the image snapping algorithm.
|
|
* See https://wiki.mozilla.org/Gecko:Image_Snapping_and_Rendering
|
|
*
|
|
* @see nsLayoutUtils::DrawImage() for the descriptions of input parameters
|
|
*/
|
|
static SnappedImageDrawingParameters
|
|
ComputeSnappedImageDrawingParameters(gfxContext* aCtx,
|
|
PRInt32 aAppUnitsPerDevPixel,
|
|
const nsRect aDest,
|
|
const nsRect aFill,
|
|
const nsPoint aAnchor,
|
|
const nsRect aDirty,
|
|
const nsIntSize aImageSize)
|
|
|
|
{
|
|
if (aDest.IsEmpty() || aFill.IsEmpty())
|
|
return SnappedImageDrawingParameters();
|
|
|
|
gfxRect devPixelDest =
|
|
nsLayoutUtils::RectToGfxRect(aDest, aAppUnitsPerDevPixel);
|
|
gfxRect devPixelFill =
|
|
nsLayoutUtils::RectToGfxRect(aFill, aAppUnitsPerDevPixel);
|
|
gfxRect devPixelDirty =
|
|
nsLayoutUtils::RectToGfxRect(aDirty, aAppUnitsPerDevPixel);
|
|
|
|
PRBool ignoreScale = PR_FALSE;
|
|
#ifdef MOZ_GFX_OPTIMIZE_MOBILE
|
|
ignoreScale = PR_TRUE;
|
|
#endif
|
|
gfxRect fill = devPixelFill;
|
|
PRBool didSnap = aCtx->UserToDevicePixelSnapped(fill, ignoreScale);
|
|
|
|
gfxSize imageSize(aImageSize.width, aImageSize.height);
|
|
|
|
// Compute the set of pixels that would be sampled by an ideal rendering
|
|
gfxPoint subimageTopLeft =
|
|
MapToFloatImagePixels(imageSize, devPixelDest, devPixelFill.TopLeft());
|
|
gfxPoint subimageBottomRight =
|
|
MapToFloatImagePixels(imageSize, devPixelDest, devPixelFill.BottomRight());
|
|
nsIntRect intSubimage;
|
|
intSubimage.MoveTo(NSToIntFloor(subimageTopLeft.x),
|
|
NSToIntFloor(subimageTopLeft.y));
|
|
intSubimage.SizeTo(NSToIntCeil(subimageBottomRight.x) - intSubimage.x,
|
|
NSToIntCeil(subimageBottomRight.y) - intSubimage.y);
|
|
|
|
// Compute the anchor point and compute final fill rect.
|
|
// This code assumes that pixel-based devices have one pixel per
|
|
// device unit!
|
|
gfxPoint anchorPoint(gfxFloat(aAnchor.x)/aAppUnitsPerDevPixel,
|
|
gfxFloat(aAnchor.y)/aAppUnitsPerDevPixel);
|
|
gfxPoint imageSpaceAnchorPoint =
|
|
MapToFloatImagePixels(imageSize, devPixelDest, anchorPoint);
|
|
gfxMatrix currentMatrix = aCtx->CurrentMatrix();
|
|
|
|
if (didSnap) {
|
|
NS_ASSERTION(!currentMatrix.HasNonAxisAlignedTransform(),
|
|
"How did we snap, then?");
|
|
imageSpaceAnchorPoint.Round();
|
|
anchorPoint = imageSpaceAnchorPoint;
|
|
anchorPoint = MapToFloatUserPixels(imageSize, devPixelDest, anchorPoint);
|
|
anchorPoint = currentMatrix.Transform(anchorPoint);
|
|
anchorPoint.Round();
|
|
|
|
// This form of Transform is safe to call since non-axis-aligned
|
|
// transforms wouldn't be snapped.
|
|
devPixelDirty = currentMatrix.Transform(devPixelDirty);
|
|
}
|
|
|
|
gfxFloat scaleX = imageSize.width*aAppUnitsPerDevPixel/aDest.width;
|
|
gfxFloat scaleY = imageSize.height*aAppUnitsPerDevPixel/aDest.height;
|
|
if (didSnap) {
|
|
// We'll reset aCTX to the identity matrix before drawing, so we need to
|
|
// adjust our scales to match.
|
|
scaleX /= currentMatrix.xx;
|
|
scaleY /= currentMatrix.yy;
|
|
}
|
|
gfxFloat translateX = imageSpaceAnchorPoint.x - anchorPoint.x*scaleX;
|
|
gfxFloat translateY = imageSpaceAnchorPoint.y - anchorPoint.y*scaleY;
|
|
gfxMatrix transform(scaleX, 0, 0, scaleY, translateX, translateY);
|
|
|
|
gfxRect finalFillRect = fill;
|
|
// If the user-space-to-image-space transform is not a straight
|
|
// translation by integers, then filtering will occur, and
|
|
// restricting the fill rect to the dirty rect would change the values
|
|
// computed for edge pixels, which we can't allow.
|
|
// Also, if didSnap is false then rounding out 'devPixelDirty' might not
|
|
// produce pixel-aligned coordinates, which would also break the values
|
|
// computed for edge pixels.
|
|
if (didSnap && !transform.HasNonIntegerTranslation()) {
|
|
devPixelDirty.RoundOut();
|
|
finalFillRect = fill.Intersect(devPixelDirty);
|
|
}
|
|
if (finalFillRect.IsEmpty())
|
|
return SnappedImageDrawingParameters();
|
|
|
|
return SnappedImageDrawingParameters(transform, finalFillRect, intSubimage,
|
|
didSnap);
|
|
}
|
|
|
|
|
|
static nsresult
|
|
DrawImageInternal(nsRenderingContext* aRenderingContext,
|
|
imgIContainer* aImage,
|
|
GraphicsFilter aGraphicsFilter,
|
|
const nsRect& aDest,
|
|
const nsRect& aFill,
|
|
const nsPoint& aAnchor,
|
|
const nsRect& aDirty,
|
|
const nsIntSize& aImageSize,
|
|
PRUint32 aImageFlags)
|
|
{
|
|
PRInt32 appUnitsPerDevPixel = aRenderingContext->AppUnitsPerDevPixel();
|
|
gfxContext* ctx = aRenderingContext->ThebesContext();
|
|
|
|
SnappedImageDrawingParameters drawingParams =
|
|
ComputeSnappedImageDrawingParameters(ctx, appUnitsPerDevPixel, aDest, aFill,
|
|
aAnchor, aDirty, aImageSize);
|
|
|
|
if (!drawingParams.mShouldDraw)
|
|
return NS_OK;
|
|
|
|
gfxContextMatrixAutoSaveRestore saveMatrix(ctx);
|
|
if (drawingParams.mResetCTM) {
|
|
ctx->IdentityMatrix();
|
|
}
|
|
|
|
aImage->Draw(ctx, aGraphicsFilter, drawingParams.mUserSpaceToImageSpace,
|
|
drawingParams.mFillRect, drawingParams.mSubimage, aImageSize,
|
|
aImageFlags);
|
|
return NS_OK;
|
|
}
|
|
|
|
/* static */ void
|
|
nsLayoutUtils::DrawPixelSnapped(nsRenderingContext* aRenderingContext,
|
|
gfxDrawable* aDrawable,
|
|
GraphicsFilter aFilter,
|
|
const nsRect& aDest,
|
|
const nsRect& aFill,
|
|
const nsPoint& aAnchor,
|
|
const nsRect& aDirty)
|
|
{
|
|
PRInt32 appUnitsPerDevPixel = aRenderingContext->AppUnitsPerDevPixel();
|
|
gfxContext* ctx = aRenderingContext->ThebesContext();
|
|
gfxIntSize drawableSize = aDrawable->Size();
|
|
nsIntSize imageSize(drawableSize.width, drawableSize.height);
|
|
|
|
SnappedImageDrawingParameters drawingParams =
|
|
ComputeSnappedImageDrawingParameters(ctx, appUnitsPerDevPixel, aDest, aFill,
|
|
aAnchor, aDirty, imageSize);
|
|
|
|
if (!drawingParams.mShouldDraw)
|
|
return;
|
|
|
|
gfxContextMatrixAutoSaveRestore saveMatrix(ctx);
|
|
if (drawingParams.mResetCTM) {
|
|
ctx->IdentityMatrix();
|
|
}
|
|
|
|
gfxRect sourceRect =
|
|
drawingParams.mUserSpaceToImageSpace.Transform(drawingParams.mFillRect);
|
|
gfxRect imageRect(0, 0, imageSize.width, imageSize.height);
|
|
gfxRect subimage(drawingParams.mSubimage.x, drawingParams.mSubimage.y,
|
|
drawingParams.mSubimage.width, drawingParams.mSubimage.height);
|
|
|
|
NS_ASSERTION(!sourceRect.Intersect(subimage).IsEmpty(),
|
|
"We must be allowed to sample *some* source pixels!");
|
|
|
|
gfxUtils::DrawPixelSnapped(ctx, aDrawable,
|
|
drawingParams.mUserSpaceToImageSpace, subimage,
|
|
sourceRect, imageRect, drawingParams.mFillRect,
|
|
gfxASurface::ImageFormatARGB32, aFilter);
|
|
}
|
|
|
|
/* static */ nsresult
|
|
nsLayoutUtils::DrawSingleUnscaledImage(nsRenderingContext* aRenderingContext,
|
|
imgIContainer* aImage,
|
|
GraphicsFilter aGraphicsFilter,
|
|
const nsPoint& aDest,
|
|
const nsRect* aDirty,
|
|
PRUint32 aImageFlags,
|
|
const nsRect* aSourceArea)
|
|
{
|
|
nsIntSize imageSize;
|
|
aImage->GetWidth(&imageSize.width);
|
|
aImage->GetHeight(&imageSize.height);
|
|
NS_ENSURE_TRUE(imageSize.width > 0 && imageSize.height > 0, NS_ERROR_FAILURE);
|
|
|
|
nscoord appUnitsPerCSSPixel = nsDeviceContext::AppUnitsPerCSSPixel();
|
|
nsSize size(imageSize.width*appUnitsPerCSSPixel,
|
|
imageSize.height*appUnitsPerCSSPixel);
|
|
|
|
nsRect source;
|
|
if (aSourceArea) {
|
|
source = *aSourceArea;
|
|
} else {
|
|
source.SizeTo(size);
|
|
}
|
|
|
|
nsRect dest(aDest - source.TopLeft(), size);
|
|
nsRect fill(aDest, source.Size());
|
|
// Ensure that only a single image tile is drawn. If aSourceArea extends
|
|
// outside the image bounds, we want to honor the aSourceArea-to-aDest
|
|
// translation but we don't want to actually tile the image.
|
|
fill.IntersectRect(fill, dest);
|
|
return DrawImageInternal(aRenderingContext, aImage, aGraphicsFilter,
|
|
dest, fill, aDest, aDirty ? *aDirty : dest,
|
|
imageSize, aImageFlags);
|
|
}
|
|
|
|
/* static */ nsresult
|
|
nsLayoutUtils::DrawSingleImage(nsRenderingContext* aRenderingContext,
|
|
imgIContainer* aImage,
|
|
GraphicsFilter aGraphicsFilter,
|
|
const nsRect& aDest,
|
|
const nsRect& aDirty,
|
|
PRUint32 aImageFlags,
|
|
const nsRect* aSourceArea)
|
|
{
|
|
nsIntSize imageSize;
|
|
if (aImage->GetType() == imgIContainer::TYPE_VECTOR) {
|
|
imageSize.width = nsPresContext::AppUnitsToIntCSSPixels(aDest.width);
|
|
imageSize.height = nsPresContext::AppUnitsToIntCSSPixels(aDest.height);
|
|
} else {
|
|
aImage->GetWidth(&imageSize.width);
|
|
aImage->GetHeight(&imageSize.height);
|
|
}
|
|
NS_ENSURE_TRUE(imageSize.width > 0 && imageSize.height > 0, NS_ERROR_FAILURE);
|
|
|
|
nsRect source;
|
|
if (aSourceArea) {
|
|
source = *aSourceArea;
|
|
} else {
|
|
nscoord appUnitsPerCSSPixel = nsDeviceContext::AppUnitsPerCSSPixel();
|
|
source.SizeTo(imageSize.width*appUnitsPerCSSPixel,
|
|
imageSize.height*appUnitsPerCSSPixel);
|
|
}
|
|
|
|
nsRect dest = nsLayoutUtils::GetWholeImageDestination(imageSize, source,
|
|
aDest);
|
|
// Ensure that only a single image tile is drawn. If aSourceArea extends
|
|
// outside the image bounds, we want to honor the aSourceArea-to-aDest
|
|
// transform but we don't want to actually tile the image.
|
|
nsRect fill;
|
|
fill.IntersectRect(aDest, dest);
|
|
return DrawImageInternal(aRenderingContext, aImage, aGraphicsFilter, dest, fill,
|
|
fill.TopLeft(), aDirty, imageSize, aImageFlags);
|
|
}
|
|
|
|
/* static */ void
|
|
nsLayoutUtils::ComputeSizeForDrawing(imgIContainer *aImage,
|
|
nsIntSize& aImageSize, /*outparam*/
|
|
nsSize& aIntrinsicRatio, /*outparam*/
|
|
bool& aGotWidth, /*outparam*/
|
|
bool& aGotHeight /*outparam*/)
|
|
{
|
|
aGotWidth = NS_SUCCEEDED(aImage->GetWidth(&aImageSize.width));
|
|
aGotHeight = NS_SUCCEEDED(aImage->GetHeight(&aImageSize.height));
|
|
|
|
if (aGotWidth && aGotHeight) {
|
|
aIntrinsicRatio = nsSize(aImageSize.width, aImageSize.height);
|
|
return;
|
|
}
|
|
|
|
// If we failed to get width or height, we either have a vector image and
|
|
// should return its intrinsic ratio, or we hit an error (say, because the
|
|
// image failed to load or couldn't be decoded) and should return zero size.
|
|
if (nsIFrame* rootFrame = aImage->GetRootLayoutFrame()) {
|
|
aIntrinsicRatio = rootFrame->GetIntrinsicRatio();
|
|
} else {
|
|
aGotWidth = aGotHeight = true;
|
|
aImageSize = nsIntSize(0, 0);
|
|
aIntrinsicRatio = nsSize(0, 0);
|
|
}
|
|
}
|
|
|
|
|
|
/* static */ nsresult
|
|
nsLayoutUtils::DrawBackgroundImage(nsRenderingContext* aRenderingContext,
|
|
imgIContainer* aImage,
|
|
const nsIntSize& aImageSize,
|
|
GraphicsFilter aGraphicsFilter,
|
|
const nsRect& aDest,
|
|
const nsRect& aFill,
|
|
const nsPoint& aAnchor,
|
|
const nsRect& aDirty,
|
|
PRUint32 aImageFlags)
|
|
{
|
|
return DrawImageInternal(aRenderingContext, aImage, aGraphicsFilter,
|
|
aDest, aFill, aAnchor, aDirty,
|
|
aImageSize, aImageFlags);
|
|
}
|
|
|
|
/* static */ nsresult
|
|
nsLayoutUtils::DrawImage(nsRenderingContext* aRenderingContext,
|
|
imgIContainer* aImage,
|
|
GraphicsFilter aGraphicsFilter,
|
|
const nsRect& aDest,
|
|
const nsRect& aFill,
|
|
const nsPoint& aAnchor,
|
|
const nsRect& aDirty,
|
|
PRUint32 aImageFlags)
|
|
{
|
|
nsIntSize imageSize;
|
|
nsSize imageRatio;
|
|
bool gotHeight, gotWidth;
|
|
ComputeSizeForDrawing(aImage, imageSize, imageRatio, gotWidth, gotHeight);
|
|
|
|
// XXX Dimensionless images shouldn't fall back to filled-area size -- the
|
|
// caller should provide the image size, a la DrawBackgroundImage.
|
|
if (gotWidth != gotHeight) {
|
|
if (!gotWidth) {
|
|
if (imageRatio.height != 0) {
|
|
imageSize.width =
|
|
NSCoordSaturatingNonnegativeMultiply(imageSize.height,
|
|
float(imageRatio.width) /
|
|
float(imageRatio.height));
|
|
gotWidth = true;
|
|
}
|
|
} else {
|
|
if (imageRatio.width != 0) {
|
|
imageSize.height =
|
|
NSCoordSaturatingNonnegativeMultiply(imageSize.width,
|
|
float(imageRatio.height) /
|
|
float(imageRatio.width));
|
|
gotHeight = true;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!gotWidth) {
|
|
imageSize.width = nsPresContext::AppUnitsToIntCSSPixels(aFill.width);
|
|
}
|
|
if (!gotHeight) {
|
|
imageSize.height = nsPresContext::AppUnitsToIntCSSPixels(aFill.height);
|
|
}
|
|
|
|
return DrawImageInternal(aRenderingContext, aImage, aGraphicsFilter,
|
|
aDest, aFill, aAnchor, aDirty,
|
|
imageSize, aImageFlags);
|
|
}
|
|
|
|
/* static */ nsRect
|
|
nsLayoutUtils::GetWholeImageDestination(const nsIntSize& aWholeImageSize,
|
|
const nsRect& aImageSourceArea,
|
|
const nsRect& aDestArea)
|
|
{
|
|
double scaleX = double(aDestArea.width)/aImageSourceArea.width;
|
|
double scaleY = double(aDestArea.height)/aImageSourceArea.height;
|
|
nscoord destOffsetX = NSToCoordRound(aImageSourceArea.x*scaleX);
|
|
nscoord destOffsetY = NSToCoordRound(aImageSourceArea.y*scaleY);
|
|
nscoord appUnitsPerCSSPixel = nsDeviceContext::AppUnitsPerCSSPixel();
|
|
nscoord wholeSizeX = NSToCoordRound(aWholeImageSize.width*appUnitsPerCSSPixel*scaleX);
|
|
nscoord wholeSizeY = NSToCoordRound(aWholeImageSize.height*appUnitsPerCSSPixel*scaleY);
|
|
return nsRect(aDestArea.TopLeft() - nsPoint(destOffsetX, destOffsetY),
|
|
nsSize(wholeSizeX, wholeSizeY));
|
|
}
|
|
|
|
static PRBool NonZeroStyleCoord(const nsStyleCoord& aCoord)
|
|
{
|
|
if (aCoord.IsCoordPercentCalcUnit()) {
|
|
// Since negative results are clamped to 0, check > 0.
|
|
return nsRuleNode::ComputeCoordPercentCalc(aCoord, nscoord_MAX) > 0 ||
|
|
nsRuleNode::ComputeCoordPercentCalc(aCoord, 0) > 0;
|
|
}
|
|
|
|
return PR_TRUE;
|
|
}
|
|
|
|
/* static */ PRBool
|
|
nsLayoutUtils::HasNonZeroCorner(const nsStyleCorners& aCorners)
|
|
{
|
|
NS_FOR_CSS_HALF_CORNERS(corner) {
|
|
if (NonZeroStyleCoord(aCorners.Get(corner)))
|
|
return PR_TRUE;
|
|
}
|
|
return PR_FALSE;
|
|
}
|
|
|
|
// aCorner is a "full corner" value, i.e. NS_CORNER_TOP_LEFT etc
|
|
static PRBool IsCornerAdjacentToSide(PRUint8 aCorner, mozilla::css::Side aSide)
|
|
{
|
|
PR_STATIC_ASSERT((int)NS_SIDE_TOP == NS_CORNER_TOP_LEFT);
|
|
PR_STATIC_ASSERT((int)NS_SIDE_RIGHT == NS_CORNER_TOP_RIGHT);
|
|
PR_STATIC_ASSERT((int)NS_SIDE_BOTTOM == NS_CORNER_BOTTOM_RIGHT);
|
|
PR_STATIC_ASSERT((int)NS_SIDE_LEFT == NS_CORNER_BOTTOM_LEFT);
|
|
PR_STATIC_ASSERT((int)NS_SIDE_TOP == ((NS_CORNER_TOP_RIGHT - 1)&3));
|
|
PR_STATIC_ASSERT((int)NS_SIDE_RIGHT == ((NS_CORNER_BOTTOM_RIGHT - 1)&3));
|
|
PR_STATIC_ASSERT((int)NS_SIDE_BOTTOM == ((NS_CORNER_BOTTOM_LEFT - 1)&3));
|
|
PR_STATIC_ASSERT((int)NS_SIDE_LEFT == ((NS_CORNER_TOP_LEFT - 1)&3));
|
|
|
|
return aSide == aCorner || aSide == ((aCorner - 1)&3);
|
|
}
|
|
|
|
/* static */ PRBool
|
|
nsLayoutUtils::HasNonZeroCornerOnSide(const nsStyleCorners& aCorners,
|
|
mozilla::css::Side aSide)
|
|
{
|
|
PR_STATIC_ASSERT(NS_CORNER_TOP_LEFT_X/2 == NS_CORNER_TOP_LEFT);
|
|
PR_STATIC_ASSERT(NS_CORNER_TOP_LEFT_Y/2 == NS_CORNER_TOP_LEFT);
|
|
PR_STATIC_ASSERT(NS_CORNER_TOP_RIGHT_X/2 == NS_CORNER_TOP_RIGHT);
|
|
PR_STATIC_ASSERT(NS_CORNER_TOP_RIGHT_Y/2 == NS_CORNER_TOP_RIGHT);
|
|
PR_STATIC_ASSERT(NS_CORNER_BOTTOM_RIGHT_X/2 == NS_CORNER_BOTTOM_RIGHT);
|
|
PR_STATIC_ASSERT(NS_CORNER_BOTTOM_RIGHT_Y/2 == NS_CORNER_BOTTOM_RIGHT);
|
|
PR_STATIC_ASSERT(NS_CORNER_BOTTOM_LEFT_X/2 == NS_CORNER_BOTTOM_LEFT);
|
|
PR_STATIC_ASSERT(NS_CORNER_BOTTOM_LEFT_Y/2 == NS_CORNER_BOTTOM_LEFT);
|
|
|
|
NS_FOR_CSS_HALF_CORNERS(corner) {
|
|
// corner is a "half corner" value, so dividing by two gives us a
|
|
// "full corner" value.
|
|
if (NonZeroStyleCoord(aCorners.Get(corner)) &&
|
|
IsCornerAdjacentToSide(corner/2, aSide))
|
|
return PR_TRUE;
|
|
}
|
|
return PR_FALSE;
|
|
}
|
|
|
|
/* static */ nsTransparencyMode
|
|
nsLayoutUtils::GetFrameTransparency(nsIFrame* aBackgroundFrame,
|
|
nsIFrame* aCSSRootFrame) {
|
|
if (aCSSRootFrame->GetStyleContext()->GetStyleDisplay()->mOpacity < 1.0f)
|
|
return eTransparencyTransparent;
|
|
|
|
if (HasNonZeroCorner(aCSSRootFrame->GetStyleContext()->GetStyleBorder()->mBorderRadius))
|
|
return eTransparencyTransparent;
|
|
|
|
if (aCSSRootFrame->GetStyleDisplay()->mAppearance == NS_THEME_WIN_GLASS)
|
|
return eTransparencyGlass;
|
|
|
|
if (aCSSRootFrame->GetStyleDisplay()->mAppearance == NS_THEME_WIN_BORDERLESS_GLASS)
|
|
return eTransparencyBorderlessGlass;
|
|
|
|
nsITheme::Transparency transparency;
|
|
if (aCSSRootFrame->IsThemed(&transparency))
|
|
return transparency == nsITheme::eTransparent
|
|
? eTransparencyTransparent
|
|
: eTransparencyOpaque;
|
|
|
|
// We need an uninitialized window to be treated as opaque because
|
|
// doing otherwise breaks window display effects on some platforms,
|
|
// specifically Vista. (bug 450322)
|
|
if (aBackgroundFrame->GetType() == nsGkAtoms::viewportFrame &&
|
|
!aBackgroundFrame->GetFirstChild(nsnull)) {
|
|
return eTransparencyOpaque;
|
|
}
|
|
|
|
nsStyleContext* bgSC;
|
|
if (!nsCSSRendering::FindBackground(aBackgroundFrame->PresContext(),
|
|
aBackgroundFrame, &bgSC)) {
|
|
return eTransparencyTransparent;
|
|
}
|
|
const nsStyleBackground* bg = bgSC->GetStyleBackground();
|
|
if (NS_GET_A(bg->mBackgroundColor) < 255 ||
|
|
// bottom layer's clip is used for the color
|
|
bg->BottomLayer().mClip != NS_STYLE_BG_CLIP_BORDER)
|
|
return eTransparencyTransparent;
|
|
return eTransparencyOpaque;
|
|
}
|
|
|
|
/* static */ PRBool
|
|
nsLayoutUtils::IsPopup(nsIFrame* aFrame)
|
|
{
|
|
nsIAtom* frameType = aFrame->GetType();
|
|
|
|
// We're a popup if we're the list control frame dropdown for a combobox.
|
|
if (frameType == nsGkAtoms::listControlFrame) {
|
|
nsListControlFrame* listControlFrame = static_cast<nsListControlFrame*>(aFrame);
|
|
|
|
if (listControlFrame) {
|
|
return listControlFrame->IsInDropDownMode();
|
|
}
|
|
}
|
|
|
|
// ... or if we're a XUL menupopup frame.
|
|
return (frameType == nsGkAtoms::menuPopupFrame);
|
|
}
|
|
|
|
/* static */ nsIFrame*
|
|
nsLayoutUtils::GetDisplayRootFrame(nsIFrame* aFrame)
|
|
{
|
|
nsIFrame* f = aFrame;
|
|
for (;;) {
|
|
if (IsPopup(f))
|
|
return f;
|
|
nsIFrame* parent = GetCrossDocParentFrame(f);
|
|
if (!parent)
|
|
return f;
|
|
f = parent;
|
|
}
|
|
}
|
|
|
|
static PRBool
|
|
IsNonzeroCoord(const nsStyleCoord& aCoord)
|
|
{
|
|
if (eStyleUnit_Coord == aCoord.GetUnit())
|
|
return aCoord.GetCoordValue() != 0;
|
|
return PR_FALSE;
|
|
}
|
|
|
|
/* static */ PRUint32
|
|
nsLayoutUtils::GetTextRunFlagsForStyle(nsStyleContext* aStyleContext,
|
|
const nsStyleText* aStyleText,
|
|
const nsStyleFont* aStyleFont)
|
|
{
|
|
PRUint32 result = 0;
|
|
if (IsNonzeroCoord(aStyleText->mLetterSpacing)) {
|
|
result |= gfxTextRunFactory::TEXT_DISABLE_OPTIONAL_LIGATURES;
|
|
}
|
|
switch (aStyleContext->GetStyleSVG()->mTextRendering) {
|
|
case NS_STYLE_TEXT_RENDERING_OPTIMIZESPEED:
|
|
result |= gfxTextRunFactory::TEXT_OPTIMIZE_SPEED;
|
|
break;
|
|
case NS_STYLE_TEXT_RENDERING_AUTO:
|
|
if (aStyleFont->mFont.size <
|
|
aStyleContext->PresContext()->GetAutoQualityMinFontSize()) {
|
|
result |= gfxTextRunFactory::TEXT_OPTIMIZE_SPEED;
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/* static */ void
|
|
nsLayoutUtils::GetRectDifferenceStrips(const nsRect& aR1, const nsRect& aR2,
|
|
nsRect* aHStrip, nsRect* aVStrip) {
|
|
NS_ASSERTION(aR1.TopLeft() == aR2.TopLeft(),
|
|
"expected rects at the same position");
|
|
nsRect unionRect(aR1.x, aR1.y, NS_MAX(aR1.width, aR2.width),
|
|
NS_MAX(aR1.height, aR2.height));
|
|
nscoord VStripStart = NS_MIN(aR1.width, aR2.width);
|
|
nscoord HStripStart = NS_MIN(aR1.height, aR2.height);
|
|
*aVStrip = unionRect;
|
|
aVStrip->x += VStripStart;
|
|
aVStrip->width -= VStripStart;
|
|
*aHStrip = unionRect;
|
|
aHStrip->y += HStripStart;
|
|
aHStrip->height -= HStripStart;
|
|
}
|
|
|
|
nsDeviceContext*
|
|
nsLayoutUtils::GetDeviceContextForScreenInfo(nsIDocShell* aDocShell)
|
|
{
|
|
nsCOMPtr<nsIDocShell> docShell = aDocShell;
|
|
while (docShell) {
|
|
// Now make sure our size is up to date. That will mean that the device
|
|
// context does the right thing on multi-monitor systems when we return it to
|
|
// the caller. It will also make sure that our prescontext has been created,
|
|
// if we're supposed to have one.
|
|
nsCOMPtr<nsPIDOMWindow> win = do_GetInterface(docShell);
|
|
if (!win) {
|
|
// No reason to go on
|
|
return nsnull;
|
|
}
|
|
|
|
win->EnsureSizeUpToDate();
|
|
|
|
nsRefPtr<nsPresContext> presContext;
|
|
docShell->GetPresContext(getter_AddRefs(presContext));
|
|
if (presContext) {
|
|
nsDeviceContext* context = presContext->DeviceContext();
|
|
if (context) {
|
|
return context;
|
|
}
|
|
}
|
|
|
|
nsCOMPtr<nsIDocShellTreeItem> curItem = do_QueryInterface(docShell);
|
|
nsCOMPtr<nsIDocShellTreeItem> parentItem;
|
|
curItem->GetParent(getter_AddRefs(parentItem));
|
|
docShell = do_QueryInterface(parentItem);
|
|
}
|
|
|
|
return nsnull;
|
|
}
|
|
|
|
/* static */ PRBool
|
|
nsLayoutUtils::IsReallyFixedPos(nsIFrame* aFrame)
|
|
{
|
|
NS_PRECONDITION(aFrame->GetParent(),
|
|
"IsReallyFixedPos called on frame not in tree");
|
|
NS_PRECONDITION(aFrame->GetStyleDisplay()->mPosition ==
|
|
NS_STYLE_POSITION_FIXED,
|
|
"IsReallyFixedPos called on non-'position:fixed' frame");
|
|
|
|
nsIAtom *parentType = aFrame->GetParent()->GetType();
|
|
return parentType == nsGkAtoms::viewportFrame ||
|
|
parentType == nsGkAtoms::pageContentFrame;
|
|
}
|
|
|
|
nsLayoutUtils::SurfaceFromElementResult
|
|
nsLayoutUtils::SurfaceFromElement(nsIDOMElement *aElement,
|
|
PRUint32 aSurfaceFlags)
|
|
{
|
|
SurfaceFromElementResult result;
|
|
nsresult rv;
|
|
|
|
nsCOMPtr<nsINode> node = do_QueryInterface(aElement);
|
|
|
|
PRBool forceCopy = (aSurfaceFlags & SFE_WANT_NEW_SURFACE) != 0;
|
|
PRBool wantImageSurface = (aSurfaceFlags & SFE_WANT_IMAGE_SURFACE) != 0;
|
|
|
|
if (aSurfaceFlags & SFE_NO_PREMULTIPLY_ALPHA) {
|
|
forceCopy = PR_TRUE;
|
|
wantImageSurface = PR_TRUE;
|
|
}
|
|
|
|
// If it's a <canvas>, we may be able to just grab its internal surface
|
|
nsCOMPtr<nsIDOMHTMLCanvasElement> domCanvas = do_QueryInterface(aElement);
|
|
if (node && domCanvas) {
|
|
nsHTMLCanvasElement *canvas = static_cast<nsHTMLCanvasElement*>(domCanvas.get());
|
|
nsIntSize nssize = canvas->GetSize();
|
|
gfxIntSize size(nssize.width, nssize.height);
|
|
|
|
nsRefPtr<gfxASurface> surf;
|
|
|
|
if (!forceCopy && canvas->CountContexts() == 1) {
|
|
nsICanvasRenderingContextInternal *srcCanvas = canvas->GetContextAtIndex(0);
|
|
rv = srcCanvas->GetThebesSurface(getter_AddRefs(surf));
|
|
|
|
if (NS_FAILED(rv))
|
|
surf = nsnull;
|
|
}
|
|
|
|
if (surf && wantImageSurface && surf->GetType() != gfxASurface::SurfaceTypeImage)
|
|
surf = nsnull;
|
|
|
|
if (!surf) {
|
|
if (wantImageSurface) {
|
|
surf = new gfxImageSurface(size, gfxASurface::ImageFormatARGB32);
|
|
} else {
|
|
surf = gfxPlatform::GetPlatform()->CreateOffscreenSurface(size, gfxASurface::CONTENT_COLOR_ALPHA);
|
|
}
|
|
|
|
nsRefPtr<gfxContext> ctx = new gfxContext(surf);
|
|
// XXX shouldn't use the external interface, but maybe we can layerify this
|
|
rv = (static_cast<nsICanvasElementExternal*>(canvas))->RenderContextsExternal(ctx, gfxPattern::FILTER_NEAREST);
|
|
if (NS_FAILED(rv))
|
|
return result;
|
|
}
|
|
|
|
// Ensure that any future changes to the canvas trigger proper invalidation,
|
|
// in case this is being used by -moz-element()
|
|
canvas->MarkContextClean();
|
|
|
|
if (aSurfaceFlags & SFE_NO_PREMULTIPLY_ALPHA) {
|
|
// we can modify this surface since we force a copy above when
|
|
// when NO_PREMULTIPLY_ALPHA is set
|
|
gfxUtils::UnpremultiplyImageSurface(static_cast<gfxImageSurface*>(surf.get()));
|
|
}
|
|
|
|
result.mSurface = surf;
|
|
result.mSize = size;
|
|
result.mPrincipal = node->NodePrincipal();
|
|
result.mIsWriteOnly = canvas->IsWriteOnly();
|
|
|
|
return result;
|
|
}
|
|
|
|
#ifdef MOZ_MEDIA
|
|
// Maybe it's <video>?
|
|
nsCOMPtr<nsIDOMHTMLVideoElement> ve = do_QueryInterface(aElement);
|
|
if (node && ve) {
|
|
nsHTMLVideoElement *video = static_cast<nsHTMLVideoElement*>(ve.get());
|
|
|
|
unsigned short readyState;
|
|
if (NS_SUCCEEDED(ve->GetReadyState(&readyState)) &&
|
|
(readyState == nsIDOMHTMLMediaElement::HAVE_NOTHING ||
|
|
readyState == nsIDOMHTMLMediaElement::HAVE_METADATA)) {
|
|
result.mIsStillLoading = PR_TRUE;
|
|
return result;
|
|
}
|
|
|
|
// If it doesn't have a principal, just bail
|
|
nsCOMPtr<nsIPrincipal> principal = video->GetCurrentPrincipal();
|
|
if (!principal)
|
|
return result;
|
|
|
|
ImageContainer *container = video->GetImageContainer();
|
|
if (!container)
|
|
return result;
|
|
|
|
gfxIntSize size;
|
|
nsRefPtr<gfxASurface> surf = container->GetCurrentAsSurface(&size);
|
|
if (!surf)
|
|
return result;
|
|
|
|
if (wantImageSurface && surf->GetType() != gfxASurface::SurfaceTypeImage) {
|
|
nsRefPtr<gfxImageSurface> imgSurf =
|
|
new gfxImageSurface(size, gfxASurface::ImageFormatARGB32);
|
|
|
|
nsRefPtr<gfxContext> ctx = new gfxContext(imgSurf);
|
|
ctx->SetOperator(gfxContext::OPERATOR_SOURCE);
|
|
ctx->DrawSurface(surf, size);
|
|
surf = imgSurf;
|
|
}
|
|
|
|
result.mSurface = surf;
|
|
result.mSize = size;
|
|
result.mPrincipal = principal.forget();
|
|
result.mIsWriteOnly = PR_FALSE;
|
|
|
|
return result;
|
|
}
|
|
#endif
|
|
|
|
// Finally, check if it's a normal image
|
|
nsCOMPtr<nsIImageLoadingContent> imageLoader = do_QueryInterface(aElement);
|
|
|
|
if (!imageLoader)
|
|
return result;
|
|
|
|
// Push a null JSContext on the stack so that code that runs within
|
|
// the below code doesn't think it's being called by JS. See bug
|
|
// 604262.
|
|
nsCxPusher pusher;
|
|
pusher.PushNull();
|
|
|
|
nsCOMPtr<imgIRequest> imgRequest;
|
|
rv = imageLoader->GetRequest(nsIImageLoadingContent::CURRENT_REQUEST,
|
|
getter_AddRefs(imgRequest));
|
|
if (NS_FAILED(rv) || !imgRequest)
|
|
return result;
|
|
|
|
PRUint32 status;
|
|
imgRequest->GetImageStatus(&status);
|
|
if ((status & imgIRequest::STATUS_LOAD_COMPLETE) == 0) {
|
|
// Spec says to use GetComplete, but that only works on
|
|
// nsIDOMHTMLImageElement, and we support all sorts of other stuff
|
|
// here. Do this for now pending spec clarification.
|
|
result.mIsStillLoading = (status & imgIRequest::STATUS_ERROR) == 0;
|
|
return result;
|
|
}
|
|
|
|
// In case of data: URIs, we want to ignore principals;
|
|
// they should have the originating content's principal,
|
|
// but that's broken at the moment in imgLib.
|
|
nsCOMPtr<nsIURI> uri;
|
|
rv = imgRequest->GetURI(getter_AddRefs(uri));
|
|
if (NS_FAILED(rv))
|
|
return result;
|
|
|
|
PRBool isDataURI = PR_FALSE;
|
|
rv = uri->SchemeIs("data", &isDataURI);
|
|
if (NS_FAILED(rv))
|
|
return result;
|
|
|
|
// Data URIs are always OK; set the principal
|
|
// to null to indicate that.
|
|
nsCOMPtr<nsIPrincipal> principal;
|
|
if (!isDataURI) {
|
|
rv = imgRequest->GetImagePrincipal(getter_AddRefs(principal));
|
|
if (NS_FAILED(rv) || !principal)
|
|
return result;
|
|
}
|
|
|
|
nsCOMPtr<imgIContainer> imgContainer;
|
|
rv = imgRequest->GetImage(getter_AddRefs(imgContainer));
|
|
if (NS_FAILED(rv) || !imgContainer)
|
|
return result;
|
|
|
|
PRUint32 whichFrame = (aSurfaceFlags & SFE_WANT_FIRST_FRAME)
|
|
? (PRUint32) imgIContainer::FRAME_FIRST
|
|
: (PRUint32) imgIContainer::FRAME_CURRENT;
|
|
PRUint32 frameFlags = imgIContainer::FLAG_SYNC_DECODE;
|
|
if (aSurfaceFlags & SFE_NO_COLORSPACE_CONVERSION)
|
|
frameFlags |= imgIContainer::FLAG_DECODE_NO_COLORSPACE_CONVERSION;
|
|
if (aSurfaceFlags & SFE_NO_PREMULTIPLY_ALPHA)
|
|
frameFlags |= imgIContainer::FLAG_DECODE_NO_PREMULTIPLY_ALPHA;
|
|
nsRefPtr<gfxASurface> framesurf;
|
|
rv = imgContainer->GetFrame(whichFrame,
|
|
frameFlags,
|
|
getter_AddRefs(framesurf));
|
|
if (NS_FAILED(rv))
|
|
return result;
|
|
|
|
PRInt32 imgWidth, imgHeight;
|
|
rv = imgContainer->GetWidth(&imgWidth);
|
|
rv |= imgContainer->GetHeight(&imgHeight);
|
|
if (NS_FAILED(rv))
|
|
return result;
|
|
|
|
if (wantImageSurface && framesurf->GetType() != gfxASurface::SurfaceTypeImage) {
|
|
forceCopy = PR_TRUE;
|
|
}
|
|
|
|
nsRefPtr<gfxASurface> gfxsurf = framesurf;
|
|
if (forceCopy) {
|
|
if (wantImageSurface) {
|
|
gfxsurf = new gfxImageSurface (gfxIntSize(imgWidth, imgHeight), gfxASurface::ImageFormatARGB32);
|
|
} else {
|
|
gfxsurf = gfxPlatform::GetPlatform()->CreateOffscreenSurface(gfxIntSize(imgWidth, imgHeight),
|
|
gfxASurface::CONTENT_COLOR_ALPHA);
|
|
}
|
|
|
|
nsRefPtr<gfxContext> ctx = new gfxContext(gfxsurf);
|
|
|
|
ctx->SetOperator(gfxContext::OPERATOR_SOURCE);
|
|
ctx->SetSource(framesurf);
|
|
ctx->Paint();
|
|
}
|
|
|
|
result.mSurface = gfxsurf;
|
|
result.mSize = gfxIntSize(imgWidth, imgHeight);
|
|
result.mPrincipal = principal.forget();
|
|
// SVG images could have <foreignObject> and/or <image> elements that load
|
|
// content from another domain. For safety, they make the canvas write-only.
|
|
// XXXdholbert We could probably be more permissive here if we check that our
|
|
// helper SVG document has no elements that could load remote content.
|
|
result.mIsWriteOnly = (imgContainer->GetType() == imgIContainer::TYPE_VECTOR);
|
|
result.mImageRequest = imgRequest.forget();
|
|
|
|
return result;
|
|
}
|
|
|
|
/* static */
|
|
nsIContent*
|
|
nsLayoutUtils::GetEditableRootContentByContentEditable(nsIDocument* aDocument)
|
|
{
|
|
// If the document is in designMode we should return NULL.
|
|
if (!aDocument || aDocument->HasFlag(NODE_IS_EDITABLE)) {
|
|
return nsnull;
|
|
}
|
|
|
|
// contenteditable only works with HTML document.
|
|
// Note: Use nsIDOMHTMLDocument rather than nsIHTMLDocument for getting the
|
|
// body node because nsIDOMHTMLDocument::GetBody() does something
|
|
// additional work for some cases and nsEditor uses them.
|
|
nsCOMPtr<nsIDOMHTMLDocument> domHTMLDoc = do_QueryInterface(aDocument);
|
|
if (!domHTMLDoc) {
|
|
return nsnull;
|
|
}
|
|
|
|
Element* rootElement = aDocument->GetRootElement();
|
|
if (rootElement && rootElement->IsEditable()) {
|
|
return rootElement;
|
|
}
|
|
|
|
// If there are no editable root element, check its <body> element.
|
|
// Note that the body element could be <frameset> element.
|
|
nsCOMPtr<nsIDOMHTMLElement> body;
|
|
nsresult rv = domHTMLDoc->GetBody(getter_AddRefs(body));
|
|
nsCOMPtr<nsIContent> content = do_QueryInterface(body);
|
|
if (NS_SUCCEEDED(rv) && content && content->IsEditable()) {
|
|
return content;
|
|
}
|
|
return nsnull;
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
/* static */ void
|
|
nsLayoutUtils::AssertNoDuplicateContinuations(nsIFrame* aContainer,
|
|
const nsFrameList& aFrameList)
|
|
{
|
|
for (nsIFrame* f = aFrameList.FirstChild(); f ; f = f->GetNextSibling()) {
|
|
// Check only later continuations of f; we deal with checking the
|
|
// earlier continuations when we hit those earlier continuations in
|
|
// the frame list.
|
|
for (nsIFrame *c = f; (c = c->GetNextInFlow());) {
|
|
NS_ASSERTION(c->GetParent() != aContainer ||
|
|
!aFrameList.ContainsFrame(c),
|
|
"Two continuations of the same frame in the same "
|
|
"frame list");
|
|
}
|
|
}
|
|
}
|
|
|
|
// Is one of aFrame's ancestors a letter frame?
|
|
static bool
|
|
IsInLetterFrame(nsIFrame *aFrame)
|
|
{
|
|
for (nsIFrame *f = aFrame->GetParent(); f; f = f->GetParent()) {
|
|
if (f->GetType() == nsGkAtoms::letterFrame) {
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/* static */ void
|
|
nsLayoutUtils::AssertTreeOnlyEmptyNextInFlows(nsIFrame *aSubtreeRoot)
|
|
{
|
|
NS_ASSERTION(aSubtreeRoot->GetPrevInFlow(),
|
|
"frame tree not empty, but caller reported complete status");
|
|
|
|
// Also assert that text frames map no text.
|
|
PRInt32 start, end;
|
|
nsresult rv = aSubtreeRoot->GetOffsets(start, end);
|
|
NS_ASSERTION(NS_SUCCEEDED(rv), "GetOffsets failed");
|
|
// In some cases involving :first-letter, we'll partially unlink a
|
|
// continuation in the middle of a continuation chain from its
|
|
// previous and next continuations before destroying it, presumably so
|
|
// that we don't also destroy the later continuations. Once we've
|
|
// done this, GetOffsets returns incorrect values.
|
|
// For examples, see list of tests in
|
|
// https://bugzilla.mozilla.org/show_bug.cgi?id=619021#c29
|
|
NS_ASSERTION(start == end || IsInLetterFrame(aSubtreeRoot),
|
|
"frame tree not empty, but caller reported complete status");
|
|
|
|
PRInt32 listIndex = 0;
|
|
nsIAtom* childList = nsnull;
|
|
do {
|
|
for (nsIFrame* child = aSubtreeRoot->GetFirstChild(childList); child;
|
|
child = child->GetNextSibling()) {
|
|
nsLayoutUtils::AssertTreeOnlyEmptyNextInFlows(child);
|
|
}
|
|
childList = aSubtreeRoot->GetAdditionalChildListName(listIndex++);
|
|
} while (childList);
|
|
}
|
|
#endif
|
|
|
|
/* static */
|
|
nsresult
|
|
nsLayoutUtils::GetFontFacesForFrames(nsIFrame* aFrame,
|
|
nsFontFaceList* aFontFaceList)
|
|
{
|
|
NS_PRECONDITION(aFrame, "NULL frame pointer");
|
|
|
|
if (aFrame->GetType() == nsGkAtoms::textFrame) {
|
|
return GetFontFacesForText(aFrame, 0, PR_INT32_MAX, PR_FALSE,
|
|
aFontFaceList);
|
|
}
|
|
|
|
while (aFrame) {
|
|
nsIAtom* childLists[] = { nsnull, nsGkAtoms::popupList };
|
|
for (int i = 0; i < NS_ARRAY_LENGTH(childLists); ++i) {
|
|
nsFrameList children(aFrame->GetChildList(childLists[i]));
|
|
for (nsFrameList::Enumerator e(children); !e.AtEnd(); e.Next()) {
|
|
nsIFrame* child = e.get();
|
|
if (child->GetPrevContinuation()) {
|
|
continue;
|
|
}
|
|
child = nsPlaceholderFrame::GetRealFrameFor(child);
|
|
nsresult rv = GetFontFacesForFrames(child, aFontFaceList);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
}
|
|
}
|
|
aFrame = GetNextContinuationOrSpecialSibling(aFrame);
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
/* static */
|
|
nsresult
|
|
nsLayoutUtils::GetFontFacesForText(nsIFrame* aFrame,
|
|
PRInt32 aStartOffset, PRInt32 aEndOffset,
|
|
PRBool aFollowContinuations,
|
|
nsFontFaceList* aFontFaceList)
|
|
{
|
|
NS_PRECONDITION(aFrame, "NULL frame pointer");
|
|
|
|
if (aFrame->GetType() != nsGkAtoms::textFrame) {
|
|
return NS_OK;
|
|
}
|
|
|
|
nsTextFrame* curr = static_cast<nsTextFrame*>(aFrame);
|
|
do {
|
|
PRInt32 offset = curr->GetContentOffset();
|
|
PRInt32 fstart = NS_MAX(offset, aStartOffset);
|
|
PRInt32 fend = NS_MIN(curr->GetContentEnd(), aEndOffset);
|
|
if (fstart >= fend) {
|
|
continue;
|
|
}
|
|
|
|
// overlapping with the offset we want
|
|
curr->EnsureTextRun();
|
|
gfxTextRun* textRun = curr->GetTextRun();
|
|
NS_ENSURE_TRUE(textRun, NS_ERROR_OUT_OF_MEMORY);
|
|
|
|
gfxSkipCharsIterator iter(textRun->GetSkipChars());
|
|
PRUint32 skipStart = iter.ConvertOriginalToSkipped(fstart - offset);
|
|
PRUint32 skipEnd = iter.ConvertOriginalToSkipped(fend - offset);
|
|
aFontFaceList->AddFontsFromTextRun(textRun,
|
|
skipStart, skipEnd - skipStart,
|
|
curr);
|
|
} while (aFollowContinuations &&
|
|
(curr = static_cast<nsTextFrame*>(curr->GetNextContinuation())));
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
/* static */
|
|
void
|
|
nsLayoutUtils::Shutdown()
|
|
{
|
|
if (sContentMap) {
|
|
delete sContentMap;
|
|
sContentMap = NULL;
|
|
}
|
|
}
|
|
|
|
nsSetAttrRunnable::nsSetAttrRunnable(nsIContent* aContent, nsIAtom* aAttrName,
|
|
const nsAString& aValue)
|
|
: mContent(aContent),
|
|
mAttrName(aAttrName),
|
|
mValue(aValue)
|
|
{
|
|
NS_ASSERTION(aContent && aAttrName, "Missing stuff, prepare to crash");
|
|
}
|
|
|
|
nsSetAttrRunnable::nsSetAttrRunnable(nsIContent* aContent, nsIAtom* aAttrName,
|
|
PRInt32 aValue)
|
|
: mContent(aContent),
|
|
mAttrName(aAttrName)
|
|
{
|
|
NS_ASSERTION(aContent && aAttrName, "Missing stuff, prepare to crash");
|
|
mValue.AppendInt(aValue);
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsSetAttrRunnable::Run()
|
|
{
|
|
return mContent->SetAttr(kNameSpaceID_None, mAttrName, mValue, PR_TRUE);
|
|
}
|
|
|
|
nsUnsetAttrRunnable::nsUnsetAttrRunnable(nsIContent* aContent,
|
|
nsIAtom* aAttrName)
|
|
: mContent(aContent),
|
|
mAttrName(aAttrName)
|
|
{
|
|
NS_ASSERTION(aContent && aAttrName, "Missing stuff, prepare to crash");
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsUnsetAttrRunnable::Run()
|
|
{
|
|
return mContent->UnsetAttr(kNameSpaceID_None, mAttrName, PR_TRUE);
|
|
}
|
|
|
|
nsReflowFrameRunnable::nsReflowFrameRunnable(nsIFrame* aFrame,
|
|
nsIPresShell::IntrinsicDirty aIntrinsicDirty,
|
|
nsFrameState aBitToAdd)
|
|
: mWeakFrame(aFrame),
|
|
mIntrinsicDirty(aIntrinsicDirty),
|
|
mBitToAdd(aBitToAdd)
|
|
{
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsReflowFrameRunnable::Run()
|
|
{
|
|
if (mWeakFrame.IsAlive()) {
|
|
mWeakFrame->PresContext()->PresShell()->
|
|
FrameNeedsReflow(mWeakFrame, mIntrinsicDirty, mBitToAdd);
|
|
}
|
|
return NS_OK;
|
|
}
|