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https://gitlab.winehq.org/wine/wine-gecko.git
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833e8a244f
Previously we snapped the results of nsDisplayItem::GetBounds and nsDisplayItem::GetOpaqueRegion internally. By tracking which display items were inside transforms, we disabled snapping quite conservatively whenever an ancestor had a transform, which is undesirable. With this patch, we don't snap inside GetBounds or GetOpaqueRegion, but just return a boolean flag indicating whether the item will draw with snapping or not. This flag is conservative so that "true" means we will snap (if the graphics context has a transform that allows snapping), but "false" means we might or might not snap (so it's always safe to return false). FrameLayerBuilder takes over responsibility for snapping item bounds. When it converts display item bounds to layer pixel coordinates, it checks the snap flag returned from the display item and checks whether the transform when we draw into the layer will be a known scale (the ContainerParameters scale factors) plus integer translation. If both are true, we snap the item bounds when converting to layer pixel coordinates. With this approach, we can snap item bounds even when the items have ancestors with active transforms.
411 lines
13 KiB
C++
411 lines
13 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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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 Communicator client 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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*
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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 "nsButtonFrameRenderer.h"
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#include "nsCSSRendering.h"
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#include "nsPresContext.h"
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#include "nsGkAtoms.h"
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#include "nsCSSPseudoElements.h"
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#include "nsINameSpaceManager.h"
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#include "nsStyleSet.h"
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#include "nsDisplayList.h"
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#include "nsITheme.h"
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#include "nsThemeConstants.h"
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#include "nsEventStates.h"
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#include "mozilla/dom/Element.h"
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#define ACTIVE "active"
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#define HOVER "hover"
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#define FOCUS "focus"
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nsButtonFrameRenderer::nsButtonFrameRenderer()
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{
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MOZ_COUNT_CTOR(nsButtonFrameRenderer);
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}
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nsButtonFrameRenderer::~nsButtonFrameRenderer()
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{
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MOZ_COUNT_DTOR(nsButtonFrameRenderer);
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}
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void
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nsButtonFrameRenderer::SetFrame(nsFrame* aFrame, nsPresContext* aPresContext)
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{
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mFrame = aFrame;
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ReResolveStyles(aPresContext);
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}
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nsIFrame*
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nsButtonFrameRenderer::GetFrame()
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{
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return mFrame;
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}
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void
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nsButtonFrameRenderer::SetDisabled(bool aDisabled, bool notify)
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{
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if (aDisabled)
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mFrame->GetContent()->SetAttr(kNameSpaceID_None, nsGkAtoms::disabled, EmptyString(),
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notify);
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else
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mFrame->GetContent()->UnsetAttr(kNameSpaceID_None, nsGkAtoms::disabled, notify);
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}
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bool
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nsButtonFrameRenderer::isDisabled()
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{
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return mFrame->GetContent()->AsElement()->
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State().HasState(NS_EVENT_STATE_DISABLED);
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}
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class nsDisplayButtonBoxShadowOuter : public nsDisplayItem {
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public:
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nsDisplayButtonBoxShadowOuter(nsDisplayListBuilder* aBuilder,
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nsButtonFrameRenderer* aRenderer)
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: nsDisplayItem(aBuilder, aRenderer->GetFrame()), mBFR(aRenderer) {
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MOZ_COUNT_CTOR(nsDisplayButtonBoxShadowOuter);
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}
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#ifdef NS_BUILD_REFCNT_LOGGING
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virtual ~nsDisplayButtonBoxShadowOuter() {
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MOZ_COUNT_DTOR(nsDisplayButtonBoxShadowOuter);
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}
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#endif
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virtual void Paint(nsDisplayListBuilder* aBuilder,
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nsRenderingContext* aCtx);
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virtual nsRect GetBounds(nsDisplayListBuilder* aBuilder, bool* aSnap);
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NS_DISPLAY_DECL_NAME("ButtonBoxShadowOuter", TYPE_BUTTON_BOX_SHADOW_OUTER)
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private:
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nsButtonFrameRenderer* mBFR;
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};
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nsRect
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nsDisplayButtonBoxShadowOuter::GetBounds(nsDisplayListBuilder* aBuilder, bool* aSnap) {
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*aSnap = false;
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return mFrame->GetVisualOverflowRectRelativeToSelf() + ToReferenceFrame();
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}
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void
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nsDisplayButtonBoxShadowOuter::Paint(nsDisplayListBuilder* aBuilder,
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nsRenderingContext* aCtx) {
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nsRect frameRect = nsRect(ToReferenceFrame(), mFrame->GetSize());
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nsRect buttonRect;
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mBFR->GetButtonRect(frameRect, buttonRect);
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nsCSSRendering::PaintBoxShadowOuter(mFrame->PresContext(), *aCtx, mFrame,
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buttonRect, mVisibleRect);
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}
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class nsDisplayButtonBorderBackground : public nsDisplayItem {
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public:
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nsDisplayButtonBorderBackground(nsDisplayListBuilder* aBuilder,
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nsButtonFrameRenderer* aRenderer)
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: nsDisplayItem(aBuilder, aRenderer->GetFrame()), mBFR(aRenderer) {
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MOZ_COUNT_CTOR(nsDisplayButtonBorderBackground);
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}
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#ifdef NS_BUILD_REFCNT_LOGGING
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virtual ~nsDisplayButtonBorderBackground() {
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MOZ_COUNT_DTOR(nsDisplayButtonBorderBackground);
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}
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#endif
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virtual void HitTest(nsDisplayListBuilder* aBuilder, const nsRect& aRect,
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HitTestState* aState, nsTArray<nsIFrame*> *aOutFrames) {
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aOutFrames->AppendElement(mFrame);
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}
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virtual void Paint(nsDisplayListBuilder* aBuilder,
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nsRenderingContext* aCtx);
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NS_DISPLAY_DECL_NAME("ButtonBorderBackground", TYPE_BUTTON_BORDER_BACKGROUND)
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private:
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nsButtonFrameRenderer* mBFR;
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};
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class nsDisplayButtonForeground : public nsDisplayItem {
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public:
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nsDisplayButtonForeground(nsDisplayListBuilder* aBuilder,
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nsButtonFrameRenderer* aRenderer)
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: nsDisplayItem(aBuilder, aRenderer->GetFrame()), mBFR(aRenderer) {
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MOZ_COUNT_CTOR(nsDisplayButtonForeground);
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}
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#ifdef NS_BUILD_REFCNT_LOGGING
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virtual ~nsDisplayButtonForeground() {
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MOZ_COUNT_DTOR(nsDisplayButtonForeground);
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}
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#endif
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virtual void Paint(nsDisplayListBuilder* aBuilder,
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nsRenderingContext* aCtx);
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NS_DISPLAY_DECL_NAME("ButtonForeground", TYPE_BUTTON_FOREGROUND)
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private:
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nsButtonFrameRenderer* mBFR;
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};
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void nsDisplayButtonBorderBackground::Paint(nsDisplayListBuilder* aBuilder,
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nsRenderingContext* aCtx)
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{
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NS_ASSERTION(mFrame, "No frame?");
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nsPresContext* pc = mFrame->PresContext();
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nsRect r = nsRect(ToReferenceFrame(), mFrame->GetSize());
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// draw the border and background inside the focus and outline borders
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mBFR->PaintBorderAndBackground(pc, *aCtx, mVisibleRect, r,
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aBuilder->GetBackgroundPaintFlags());
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}
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void nsDisplayButtonForeground::Paint(nsDisplayListBuilder* aBuilder,
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nsRenderingContext* aCtx)
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{
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nsPresContext *presContext = mFrame->PresContext();
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const nsStyleDisplay *disp = mFrame->GetStyleDisplay();
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if (!mFrame->IsThemed(disp) ||
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!presContext->GetTheme()->ThemeDrawsFocusForWidget(presContext, mFrame, disp->mAppearance)) {
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// draw the focus and outline borders
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nsRect r = nsRect(ToReferenceFrame(), mFrame->GetSize());
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mBFR->PaintOutlineAndFocusBorders(presContext, *aCtx, mVisibleRect, r);
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}
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}
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nsresult
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nsButtonFrameRenderer::DisplayButton(nsDisplayListBuilder* aBuilder,
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nsDisplayList* aBackground,
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nsDisplayList* aForeground)
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{
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if (mFrame->GetStyleBorder()->mBoxShadow) {
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nsresult rv = aBackground->AppendNewToTop(new (aBuilder)
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nsDisplayButtonBoxShadowOuter(aBuilder, this));
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NS_ENSURE_SUCCESS(rv, rv);
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}
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nsresult rv = aBackground->AppendNewToTop(new (aBuilder)
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nsDisplayButtonBorderBackground(aBuilder, this));
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NS_ENSURE_SUCCESS(rv, rv);
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return aForeground->AppendNewToTop(new (aBuilder)
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nsDisplayButtonForeground(aBuilder, this));
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}
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void
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nsButtonFrameRenderer::PaintOutlineAndFocusBorders(nsPresContext* aPresContext,
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nsRenderingContext& aRenderingContext,
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const nsRect& aDirtyRect,
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const nsRect& aRect)
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{
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// once we have all that we'll draw the focus if we have it. We will
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// need to draw 2 focuses, the inner and the outer. This is so we
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// can do any kind of look and feel. Some buttons have focus on the
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// outside like mac and motif. While others like windows have it
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// inside (dotted line). Usually only one will be specifed. But I
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// guess you could have both if you wanted to.
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nsRect rect;
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if (mOuterFocusStyle) {
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// ---------- paint the outer focus border -------------
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GetButtonOuterFocusRect(aRect, rect);
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nsCSSRendering::PaintBorder(aPresContext, aRenderingContext, mFrame,
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aDirtyRect, rect, mOuterFocusStyle);
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}
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if (mInnerFocusStyle) {
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// ---------- paint the inner focus border -------------
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GetButtonInnerFocusRect(aRect, rect);
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nsCSSRendering::PaintBorder(aPresContext, aRenderingContext, mFrame,
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aDirtyRect, rect, mInnerFocusStyle);
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}
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}
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void
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nsButtonFrameRenderer::PaintBorderAndBackground(nsPresContext* aPresContext,
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nsRenderingContext& aRenderingContext,
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const nsRect& aDirtyRect,
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const nsRect& aRect,
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PRUint32 aBGFlags)
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{
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// get the button rect this is inside the focus and outline rects
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nsRect buttonRect;
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GetButtonRect(aRect, buttonRect);
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nsStyleContext* context = mFrame->GetStyleContext();
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nsCSSRendering::PaintBackground(aPresContext, aRenderingContext, mFrame,
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aDirtyRect, buttonRect, aBGFlags);
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nsCSSRendering::PaintBoxShadowInner(aPresContext, aRenderingContext,
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mFrame, buttonRect, aDirtyRect);
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nsCSSRendering::PaintBorder(aPresContext, aRenderingContext, mFrame,
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aDirtyRect, buttonRect, context);
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}
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void
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nsButtonFrameRenderer::GetButtonOuterFocusRect(const nsRect& aRect, nsRect& focusRect)
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{
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focusRect = aRect;
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}
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void
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nsButtonFrameRenderer::GetButtonRect(const nsRect& aRect, nsRect& r)
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{
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r = aRect;
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r.Deflate(GetButtonOuterFocusBorderAndPadding());
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}
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void
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nsButtonFrameRenderer::GetButtonInnerFocusRect(const nsRect& aRect, nsRect& focusRect)
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{
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GetButtonRect(aRect, focusRect);
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focusRect.Deflate(GetButtonBorderAndPadding());
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focusRect.Deflate(GetButtonInnerFocusMargin());
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}
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nsMargin
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nsButtonFrameRenderer::GetButtonOuterFocusBorderAndPadding()
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{
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nsMargin result(0,0,0,0);
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if (mOuterFocusStyle) {
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if (!mOuterFocusStyle->GetStylePadding()->GetPadding(result)) {
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NS_NOTYETIMPLEMENTED("percentage padding");
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}
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result += mOuterFocusStyle->GetStyleBorder()->GetActualBorder();
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}
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return result;
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}
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nsMargin
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nsButtonFrameRenderer::GetButtonBorderAndPadding()
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{
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return mFrame->GetUsedBorderAndPadding();
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}
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/**
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* Gets the size of the buttons border this is the union of the normal and disabled borders.
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*/
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nsMargin
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nsButtonFrameRenderer::GetButtonInnerFocusMargin()
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{
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nsMargin innerFocusMargin(0,0,0,0);
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if (mInnerFocusStyle) {
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const nsStyleMargin* margin = mInnerFocusStyle->GetStyleMargin();
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if (!margin->GetMargin(innerFocusMargin)) {
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NS_NOTYETIMPLEMENTED("percentage margin");
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}
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}
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return innerFocusMargin;
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}
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nsMargin
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nsButtonFrameRenderer::GetButtonInnerFocusBorderAndPadding()
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{
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nsMargin result(0,0,0,0);
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if (mInnerFocusStyle) {
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if (!mInnerFocusStyle->GetStylePadding()->GetPadding(result)) {
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NS_NOTYETIMPLEMENTED("percentage padding");
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}
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result += mInnerFocusStyle->GetStyleBorder()->GetActualBorder();
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}
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return result;
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}
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// gets all the focus borders and padding that will be added to the regular border
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nsMargin
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nsButtonFrameRenderer::GetAddedButtonBorderAndPadding()
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{
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return GetButtonOuterFocusBorderAndPadding() + GetButtonInnerFocusMargin() + GetButtonInnerFocusBorderAndPadding();
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}
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/**
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* Call this when styles change
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*/
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void
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nsButtonFrameRenderer::ReResolveStyles(nsPresContext* aPresContext)
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{
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// get all the styles
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nsStyleContext* context = mFrame->GetStyleContext();
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nsStyleSet *styleSet = aPresContext->StyleSet();
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// style for the inner such as a dotted line (Windows)
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mInnerFocusStyle =
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styleSet->ProbePseudoElementStyle(mFrame->GetContent()->AsElement(),
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nsCSSPseudoElements::ePseudo_mozFocusInner,
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context);
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// style for outer focus like a ridged border (MAC).
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mOuterFocusStyle =
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styleSet->ProbePseudoElementStyle(mFrame->GetContent()->AsElement(),
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nsCSSPseudoElements::ePseudo_mozFocusOuter,
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context);
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}
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nsStyleContext*
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nsButtonFrameRenderer::GetStyleContext(PRInt32 aIndex) const
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{
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switch (aIndex) {
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case NS_BUTTON_RENDERER_FOCUS_INNER_CONTEXT_INDEX:
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return mInnerFocusStyle;
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case NS_BUTTON_RENDERER_FOCUS_OUTER_CONTEXT_INDEX:
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return mOuterFocusStyle;
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default:
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return nsnull;
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}
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}
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void
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nsButtonFrameRenderer::SetStyleContext(PRInt32 aIndex, nsStyleContext* aStyleContext)
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{
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switch (aIndex) {
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case NS_BUTTON_RENDERER_FOCUS_INNER_CONTEXT_INDEX:
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mInnerFocusStyle = aStyleContext;
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break;
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case NS_BUTTON_RENDERER_FOCUS_OUTER_CONTEXT_INDEX:
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mOuterFocusStyle = aStyleContext;
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break;
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}
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}
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