mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
772 lines
27 KiB
C++
772 lines
27 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/* rendering object that goes directly inside the document's scrollbars */
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#include "nsCanvasFrame.h"
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#include "gfxUtils.h"
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#include "nsContainerFrame.h"
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#include "nsCSSRendering.h"
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#include "nsPresContext.h"
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#include "nsStyleContext.h"
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#include "nsRenderingContext.h"
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#include "nsGkAtoms.h"
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#include "nsPresShell.h"
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#include "nsIPresShell.h"
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#include "nsDisplayList.h"
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#include "nsCSSFrameConstructor.h"
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#include "nsFrameManager.h"
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#include "gfxPlatform.h"
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#include "nsPrintfCString.h"
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#include "mozilla/dom/AnonymousContent.h"
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// for touchcaret
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#include "nsContentList.h"
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#include "nsContentCreatorFunctions.h"
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#include "nsContentUtils.h"
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#include "nsStyleSet.h"
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// for focus
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#include "nsIScrollableFrame.h"
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#ifdef DEBUG_CANVAS_FOCUS
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#include "nsIDocShell.h"
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#endif
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//#define DEBUG_CANVAS_FOCUS
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using namespace mozilla;
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using namespace mozilla::dom;
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using namespace mozilla::layout;
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using namespace mozilla::gfx;
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nsCanvasFrame*
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NS_NewCanvasFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
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{
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return new (aPresShell) nsCanvasFrame(aContext);
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}
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NS_IMPL_FRAMEARENA_HELPERS(nsCanvasFrame)
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NS_QUERYFRAME_HEAD(nsCanvasFrame)
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NS_QUERYFRAME_ENTRY(nsCanvasFrame)
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NS_QUERYFRAME_ENTRY(nsIAnonymousContentCreator)
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NS_QUERYFRAME_TAIL_INHERITING(nsContainerFrame)
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NS_IMPL_ISUPPORTS(nsCanvasFrame::DummyTouchListener, nsIDOMEventListener)
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void
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nsCanvasFrame::ShowCustomContentContainer()
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{
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if (mCustomContentContainer) {
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mCustomContentContainer->UnsetAttr(kNameSpaceID_None, nsGkAtoms::hidden, true);
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}
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}
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void
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nsCanvasFrame::HideCustomContentContainer()
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{
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if (mCustomContentContainer) {
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mCustomContentContainer->SetAttr(kNameSpaceID_None, nsGkAtoms::hidden,
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NS_LITERAL_STRING("true"),
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true);
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}
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}
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nsresult
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nsCanvasFrame::CreateAnonymousContent(nsTArray<ContentInfo>& aElements)
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{
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if (!mContent) {
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return NS_OK;
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}
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nsCOMPtr<nsIDocument> doc = mContent->OwnerDoc();
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nsresult rv = NS_OK;
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ErrorResult er;
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// We won't create touch caret element if preference is not enabled.
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if (PresShell::TouchCaretPrefEnabled()) {
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nsRefPtr<NodeInfo> nodeInfo;
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// Create and append touch caret frame.
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nodeInfo = doc->NodeInfoManager()->GetNodeInfo(nsGkAtoms::div, nullptr,
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kNameSpaceID_XHTML,
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nsIDOMNode::ELEMENT_NODE);
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NS_ENSURE_TRUE(nodeInfo, NS_ERROR_OUT_OF_MEMORY);
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rv = NS_NewHTMLElement(getter_AddRefs(mTouchCaretElement), nodeInfo.forget(),
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NOT_FROM_PARSER);
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NS_ENSURE_SUCCESS(rv, rv);
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aElements.AppendElement(mTouchCaretElement);
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// Set touch caret to visibility: hidden by default.
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nsAutoString classValue;
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classValue.AppendLiteral("moz-touchcaret hidden");
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rv = mTouchCaretElement->SetAttr(kNameSpaceID_None, nsGkAtoms::_class,
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classValue, true);
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if (!mDummyTouchListener) {
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mDummyTouchListener = new DummyTouchListener();
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}
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mTouchCaretElement->AddEventListener(NS_LITERAL_STRING("touchstart"),
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mDummyTouchListener, false);
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NS_ENSURE_SUCCESS(rv, rv);
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}
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if (PresShell::SelectionCaretPrefEnabled()) {
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// Selection caret
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mSelectionCaretsStartElement = doc->CreateHTMLElement(nsGkAtoms::div);
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aElements.AppendElement(mSelectionCaretsStartElement);
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nsCOMPtr<mozilla::dom::Element> selectionCaretsStartElementInner = doc->CreateHTMLElement(nsGkAtoms::div);
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mSelectionCaretsStartElement->AppendChildTo(selectionCaretsStartElementInner, false);
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mSelectionCaretsEndElement = doc->CreateHTMLElement(nsGkAtoms::div);
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aElements.AppendElement(mSelectionCaretsEndElement);
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nsCOMPtr<mozilla::dom::Element> selectionCaretsEndElementInner = doc->CreateHTMLElement(nsGkAtoms::div);
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mSelectionCaretsEndElement->AppendChildTo(selectionCaretsEndElementInner, false);
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rv = mSelectionCaretsStartElement->SetAttr(kNameSpaceID_None, nsGkAtoms::_class,
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NS_LITERAL_STRING("moz-selectioncaret-left hidden"),
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true);
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NS_ENSURE_SUCCESS(rv, rv);
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rv = mSelectionCaretsEndElement->SetAttr(kNameSpaceID_None, nsGkAtoms::_class,
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NS_LITERAL_STRING("moz-selectioncaret-right hidden"),
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true);
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if (!mDummyTouchListener) {
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mDummyTouchListener = new DummyTouchListener();
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}
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mSelectionCaretsStartElement->AddEventListener(NS_LITERAL_STRING("touchstart"),
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mDummyTouchListener, false);
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mSelectionCaretsEndElement->AddEventListener(NS_LITERAL_STRING("touchstart"),
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mDummyTouchListener, false);
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NS_ENSURE_SUCCESS(rv, rv);
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}
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// Create the custom content container.
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mCustomContentContainer = doc->CreateHTMLElement(nsGkAtoms::div);
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aElements.AppendElement(mCustomContentContainer);
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// XXX add :moz-native-anonymous or will that be automatically set?
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rv = mCustomContentContainer->SetAttr(kNameSpaceID_None, nsGkAtoms::_class,
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NS_LITERAL_STRING("moz-custom-content-container"),
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true);
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NS_ENSURE_SUCCESS(rv, rv);
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// Append all existing AnonymousContent nodes stored at document level if any.
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size_t len = doc->GetAnonymousContents().Length();
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for (size_t i = 0; i < len; ++i) {
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nsCOMPtr<Element> node = doc->GetAnonymousContents()[i]->GetContentNode();
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mCustomContentContainer->AppendChildTo(node->AsContent(), true);
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}
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// Only create a frame for mCustomContentContainer if it has some children.
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if (len == 0) {
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HideCustomContentContainer();
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}
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return NS_OK;
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}
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void
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nsCanvasFrame::AppendAnonymousContentTo(nsTArray<nsIContent*>& aElements, uint32_t aFilter)
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{
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if (mTouchCaretElement) {
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aElements.AppendElement(mTouchCaretElement);
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}
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if (mSelectionCaretsStartElement) {
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aElements.AppendElement(mSelectionCaretsStartElement);
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}
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if (mSelectionCaretsEndElement) {
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aElements.AppendElement(mSelectionCaretsEndElement);
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}
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aElements.AppendElement(mCustomContentContainer);
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}
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void
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nsCanvasFrame::DestroyFrom(nsIFrame* aDestructRoot)
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{
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nsIScrollableFrame* sf =
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PresContext()->GetPresShell()->GetRootScrollFrameAsScrollable();
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if (sf) {
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sf->RemoveScrollPositionListener(this);
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}
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if (mTouchCaretElement) {
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mTouchCaretElement->RemoveEventListener(NS_LITERAL_STRING("touchstart"),
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mDummyTouchListener, false);
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}
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if (mSelectionCaretsStartElement) {
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mSelectionCaretsStartElement->RemoveEventListener(NS_LITERAL_STRING("touchstart"),
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mDummyTouchListener, false);
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}
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if (mSelectionCaretsEndElement) {
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mSelectionCaretsEndElement->RemoveEventListener(NS_LITERAL_STRING("touchstart"),
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mDummyTouchListener, false);
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}
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nsContentUtils::DestroyAnonymousContent(&mTouchCaretElement);
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nsContentUtils::DestroyAnonymousContent(&mSelectionCaretsStartElement);
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nsContentUtils::DestroyAnonymousContent(&mSelectionCaretsEndElement);
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// Elements inserted in the custom content container have the same lifetime as
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// the document, so before destroying the container, make sure to keep a clone
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// of each of them at document level so they can be re-appended on reframe.
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if (mCustomContentContainer) {
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nsCOMPtr<nsIDocument> doc = mContent->OwnerDoc();
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ErrorResult rv;
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nsTArray<nsRefPtr<mozilla::dom::AnonymousContent>>& docAnonContents =
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doc->GetAnonymousContents();
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for (size_t i = 0, len = docAnonContents.Length(); i < len; ++i) {
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AnonymousContent* content = docAnonContents[i];
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nsCOMPtr<nsINode> clonedElement = content->GetContentNode()->CloneNode(true, rv);
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content->SetContentNode(clonedElement->AsElement());
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}
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}
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nsContentUtils::DestroyAnonymousContent(&mCustomContentContainer);
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nsContainerFrame::DestroyFrom(aDestructRoot);
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}
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void
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nsCanvasFrame::ScrollPositionWillChange(nscoord aX, nscoord aY)
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{
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if (mDoPaintFocus) {
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mDoPaintFocus = false;
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PresContext()->FrameManager()->GetRootFrame()->InvalidateFrameSubtree();
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}
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}
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NS_IMETHODIMP
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nsCanvasFrame::SetHasFocus(bool aHasFocus)
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{
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if (mDoPaintFocus != aHasFocus) {
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mDoPaintFocus = aHasFocus;
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PresContext()->FrameManager()->GetRootFrame()->InvalidateFrameSubtree();
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if (!mAddedScrollPositionListener) {
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nsIScrollableFrame* sf =
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PresContext()->GetPresShell()->GetRootScrollFrameAsScrollable();
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if (sf) {
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sf->AddScrollPositionListener(this);
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mAddedScrollPositionListener = true;
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}
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}
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}
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return NS_OK;
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}
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#ifdef DEBUG
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void
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nsCanvasFrame::SetInitialChildList(ChildListID aListID,
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nsFrameList& aChildList)
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{
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NS_ASSERTION(aListID != kPrincipalList ||
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aChildList.IsEmpty() || aChildList.OnlyChild(),
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"Primary child list can have at most one frame in it");
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nsContainerFrame::SetInitialChildList(aListID, aChildList);
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}
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void
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nsCanvasFrame::AppendFrames(ChildListID aListID,
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nsFrameList& aFrameList)
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{
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MOZ_ASSERT(aListID == kPrincipalList, "unexpected child list");
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if (!mFrames.IsEmpty()) {
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for (nsFrameList::Enumerator e(aFrameList); !e.AtEnd(); e.Next()) {
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// We only allow native anonymous child frame for touch caret,
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// which its placeholder is added to the Principal child lists.
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MOZ_ASSERT(e.get()->GetContent()->IsInNativeAnonymousSubtree(),
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"invalid child list");
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}
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}
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nsFrame::VerifyDirtyBitSet(aFrameList);
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nsContainerFrame::AppendFrames(aListID, aFrameList);
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}
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void
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nsCanvasFrame::InsertFrames(ChildListID aListID,
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nsIFrame* aPrevFrame,
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nsFrameList& aFrameList)
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{
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// Because we only support a single child frame inserting is the same
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// as appending
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MOZ_ASSERT(!aPrevFrame, "unexpected previous sibling frame");
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AppendFrames(aListID, aFrameList);
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}
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void
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nsCanvasFrame::RemoveFrame(ChildListID aListID,
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nsIFrame* aOldFrame)
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{
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MOZ_ASSERT(aListID == kPrincipalList, "unexpected child list");
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nsContainerFrame::RemoveFrame(aListID, aOldFrame);
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}
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#endif
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nsRect nsCanvasFrame::CanvasArea() const
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{
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// Not clear which overflow rect we want here, but it probably doesn't
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// matter.
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nsRect result(GetVisualOverflowRect());
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nsIScrollableFrame *scrollableFrame = do_QueryFrame(GetParent());
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if (scrollableFrame) {
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nsRect portRect = scrollableFrame->GetScrollPortRect();
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result.UnionRect(result, nsRect(nsPoint(0, 0), portRect.Size()));
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}
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return result;
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}
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void
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nsDisplayCanvasBackgroundColor::Paint(nsDisplayListBuilder* aBuilder,
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nsRenderingContext* aCtx)
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{
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nsCanvasFrame* frame = static_cast<nsCanvasFrame*>(mFrame);
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nsPoint offset = ToReferenceFrame();
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nsRect bgClipRect = frame->CanvasArea() + offset;
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if (NS_GET_A(mColor) > 0) {
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DrawTarget* drawTarget = aCtx->GetDrawTarget();
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int32_t appUnitsPerDevPixel = mFrame->PresContext()->AppUnitsPerDevPixel();
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Rect devPxRect =
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NSRectToSnappedRect(bgClipRect, appUnitsPerDevPixel, *drawTarget);
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drawTarget->FillRect(devPxRect, ColorPattern(ToDeviceColor(mColor)));
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}
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}
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#ifdef MOZ_DUMP_PAINTING
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void
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nsDisplayCanvasBackgroundColor::WriteDebugInfo(std::stringstream& aStream)
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{
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aStream << " (rgba "
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<< (int)NS_GET_R(mColor) << ","
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<< (int)NS_GET_G(mColor) << ","
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<< (int)NS_GET_B(mColor) << ","
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<< (int)NS_GET_A(mColor) << ")";
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}
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#endif
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static void BlitSurface(DrawTarget* aDest, const gfxRect& aRect, DrawTarget* aSource)
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{
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RefPtr<SourceSurface> source = aSource->Snapshot();
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aDest->DrawSurface(source,
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Rect(aRect.x, aRect.y, aRect.width, aRect.height),
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Rect(0, 0, aRect.width, aRect.height));
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}
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void
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nsDisplayCanvasBackgroundImage::Paint(nsDisplayListBuilder* aBuilder,
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nsRenderingContext* aCtx)
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{
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nsCanvasFrame* frame = static_cast<nsCanvasFrame*>(mFrame);
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nsPoint offset = ToReferenceFrame();
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nsRect bgClipRect = frame->CanvasArea() + offset;
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nsRenderingContext context;
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nsRefPtr<gfxContext> dest = aCtx->ThebesContext();
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RefPtr<DrawTarget> dt;
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gfxRect destRect;
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#ifndef MOZ_GFX_OPTIMIZE_MOBILE
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if (IsSingleFixedPositionImage(aBuilder, bgClipRect, &destRect) &&
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aBuilder->IsPaintingToWindow() && !aBuilder->IsCompositingCheap() &&
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!dest->CurrentMatrix().HasNonIntegerTranslation()) {
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// Snap image rectangle to nearest pixel boundaries. This is the right way
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// to snap for this context, because we checked HasNonIntegerTranslation above.
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destRect.Round();
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dt = static_cast<DrawTarget*>(Frame()->Properties().Get(nsIFrame::CachedBackgroundImageDT()));
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DrawTarget* destDT = dest->GetDrawTarget();
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if (dt) {
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BlitSurface(destDT, destRect, dt);
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return;
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}
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dt = destDT->CreateSimilarDrawTarget(IntSize(ceil(destRect.width), ceil(destRect.height)), SurfaceFormat::B8G8R8A8);
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if (dt) {
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nsRefPtr<gfxContext> ctx = new gfxContext(dt);
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ctx->SetMatrix(
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ctx->CurrentMatrix().Translate(-destRect.x, -destRect.y));
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context.Init(ctx);
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}
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}
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#endif
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PaintInternal(aBuilder,
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dt ? &context : aCtx,
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dt ? bgClipRect: mVisibleRect,
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&bgClipRect);
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if (dt) {
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BlitSurface(dest->GetDrawTarget(), destRect, dt);
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frame->Properties().Set(nsIFrame::CachedBackgroundImageDT(), dt.forget().take());
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}
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}
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void
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nsDisplayCanvasThemedBackground::Paint(nsDisplayListBuilder* aBuilder,
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nsRenderingContext* aCtx)
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{
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nsCanvasFrame* frame = static_cast<nsCanvasFrame*>(mFrame);
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nsPoint offset = ToReferenceFrame();
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nsRect bgClipRect = frame->CanvasArea() + offset;
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PaintInternal(aBuilder, aCtx, mVisibleRect, &bgClipRect);
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}
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/**
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* A display item to paint the focus ring for the document.
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*
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* The only reason this can't use nsDisplayGeneric is overriding GetBounds.
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*/
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class nsDisplayCanvasFocus : public nsDisplayItem {
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public:
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nsDisplayCanvasFocus(nsDisplayListBuilder* aBuilder, nsCanvasFrame *aFrame)
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: nsDisplayItem(aBuilder, aFrame)
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{
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MOZ_COUNT_CTOR(nsDisplayCanvasFocus);
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}
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virtual ~nsDisplayCanvasFocus() {
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MOZ_COUNT_DTOR(nsDisplayCanvasFocus);
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}
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virtual nsRect GetBounds(nsDisplayListBuilder* aBuilder,
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bool* aSnap) MOZ_OVERRIDE
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{
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*aSnap = false;
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// This is an overestimate, but that's not a problem.
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nsCanvasFrame* frame = static_cast<nsCanvasFrame*>(mFrame);
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return frame->CanvasArea() + ToReferenceFrame();
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}
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virtual void Paint(nsDisplayListBuilder* aBuilder,
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nsRenderingContext* aCtx) MOZ_OVERRIDE
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{
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nsCanvasFrame* frame = static_cast<nsCanvasFrame*>(mFrame);
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frame->PaintFocus(*aCtx, ToReferenceFrame());
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}
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NS_DISPLAY_DECL_NAME("CanvasFocus", TYPE_CANVAS_FOCUS)
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};
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void
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nsCanvasFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
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const nsRect& aDirtyRect,
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const nsDisplayListSet& aLists)
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{
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if (GetPrevInFlow()) {
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DisplayOverflowContainers(aBuilder, aDirtyRect, aLists);
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}
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// Force a background to be shown. We may have a background propagated to us,
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// in which case StyleBackground wouldn't have the right background
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// and the code in nsFrame::DisplayBorderBackgroundOutline might not give us
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// a background.
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// We don't have any border or outline, and our background draws over
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// the overflow area, so just add nsDisplayCanvasBackground instead of
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// calling DisplayBorderBackgroundOutline.
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if (IsVisibleForPainting(aBuilder)) {
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nsStyleContext* bgSC;
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const nsStyleBackground* bg = nullptr;
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bool isThemed = IsThemed();
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if (!isThemed && nsCSSRendering::FindBackground(this, &bgSC)) {
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bg = bgSC->StyleBackground();
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}
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aLists.BorderBackground()->AppendNewToTop(
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new (aBuilder) nsDisplayCanvasBackgroundColor(aBuilder, this));
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if (isThemed) {
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aLists.BorderBackground()->AppendNewToTop(
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new (aBuilder) nsDisplayCanvasThemedBackground(aBuilder, this));
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return;
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}
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if (!bg) {
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return;
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}
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bool needBlendContainer = false;
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// Create separate items for each background layer.
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NS_FOR_VISIBLE_BACKGROUND_LAYERS_BACK_TO_FRONT(i, bg) {
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|
if (bg->mLayers[i].mImage.IsEmpty()) {
|
|
continue;
|
|
}
|
|
if (bg->mLayers[i].mBlendMode != NS_STYLE_BLEND_NORMAL) {
|
|
needBlendContainer = true;
|
|
}
|
|
aLists.BorderBackground()->AppendNewToTop(
|
|
new (aBuilder) nsDisplayCanvasBackgroundImage(aBuilder, this, i, bg));
|
|
}
|
|
|
|
if (needBlendContainer) {
|
|
aLists.BorderBackground()->AppendNewToTop(
|
|
new (aBuilder) nsDisplayBlendContainer(aBuilder, this, aLists.BorderBackground()));
|
|
}
|
|
}
|
|
|
|
nsIFrame* kid;
|
|
for (kid = GetFirstPrincipalChild(); kid; kid = kid->GetNextSibling()) {
|
|
// Skip touch caret frame if we do not build caret.
|
|
if (!aBuilder->IsBuildingCaret() && kid->GetContent() == mTouchCaretElement) {
|
|
continue;
|
|
}
|
|
|
|
// Put our child into its own pseudo-stack.
|
|
BuildDisplayListForChild(aBuilder, kid, aDirtyRect, aLists);
|
|
}
|
|
|
|
#ifdef DEBUG_CANVAS_FOCUS
|
|
nsCOMPtr<nsIContent> focusContent;
|
|
aPresContext->EventStateManager()->
|
|
GetFocusedContent(getter_AddRefs(focusContent));
|
|
|
|
bool hasFocus = false;
|
|
nsCOMPtr<nsISupports> container;
|
|
aPresContext->GetContainer(getter_AddRefs(container));
|
|
nsCOMPtr<nsIDocShell> docShell(do_QueryInterface(container));
|
|
if (docShell) {
|
|
docShell->GetHasFocus(&hasFocus);
|
|
printf("%p - nsCanvasFrame::Paint R:%d,%d,%d,%d DR: %d,%d,%d,%d\n", this,
|
|
mRect.x, mRect.y, mRect.width, mRect.height,
|
|
aDirtyRect.x, aDirtyRect.y, aDirtyRect.width, aDirtyRect.height);
|
|
}
|
|
printf("%p - Focus: %s c: %p DoPaint:%s\n", docShell.get(), hasFocus?"Y":"N",
|
|
focusContent.get(), mDoPaintFocus?"Y":"N");
|
|
#endif
|
|
|
|
if (!mDoPaintFocus)
|
|
return;
|
|
// Only paint the focus if we're visible
|
|
if (!StyleVisibility()->IsVisible())
|
|
return;
|
|
|
|
aLists.Outlines()->AppendNewToTop(new (aBuilder)
|
|
nsDisplayCanvasFocus(aBuilder, this));
|
|
}
|
|
|
|
void
|
|
nsCanvasFrame::PaintFocus(nsRenderingContext& aRenderingContext, nsPoint aPt)
|
|
{
|
|
nsRect focusRect(aPt, GetSize());
|
|
|
|
nsIScrollableFrame *scrollableFrame = do_QueryFrame(GetParent());
|
|
if (scrollableFrame) {
|
|
nsRect portRect = scrollableFrame->GetScrollPortRect();
|
|
focusRect.width = portRect.width;
|
|
focusRect.height = portRect.height;
|
|
focusRect.MoveBy(scrollableFrame->GetScrollPosition());
|
|
}
|
|
|
|
// XXX use the root frame foreground color, but should we find BODY frame
|
|
// for HTML documents?
|
|
nsIFrame* root = mFrames.FirstChild();
|
|
const nsStyleColor* color = root ? root->StyleColor() : StyleColor();
|
|
if (!color) {
|
|
NS_ERROR("current color cannot be found");
|
|
return;
|
|
}
|
|
|
|
nsCSSRendering::PaintFocus(PresContext(), aRenderingContext,
|
|
focusRect, color->mColor);
|
|
}
|
|
|
|
/* virtual */ nscoord
|
|
nsCanvasFrame::GetMinISize(nsRenderingContext *aRenderingContext)
|
|
{
|
|
nscoord result;
|
|
DISPLAY_MIN_WIDTH(this, result);
|
|
if (mFrames.IsEmpty())
|
|
result = 0;
|
|
else
|
|
result = mFrames.FirstChild()->GetMinISize(aRenderingContext);
|
|
return result;
|
|
}
|
|
|
|
/* virtual */ nscoord
|
|
nsCanvasFrame::GetPrefISize(nsRenderingContext *aRenderingContext)
|
|
{
|
|
nscoord result;
|
|
DISPLAY_PREF_WIDTH(this, result);
|
|
if (mFrames.IsEmpty())
|
|
result = 0;
|
|
else
|
|
result = mFrames.FirstChild()->GetPrefISize(aRenderingContext);
|
|
return result;
|
|
}
|
|
|
|
void
|
|
nsCanvasFrame::Reflow(nsPresContext* aPresContext,
|
|
nsHTMLReflowMetrics& aDesiredSize,
|
|
const nsHTMLReflowState& aReflowState,
|
|
nsReflowStatus& aStatus)
|
|
{
|
|
DO_GLOBAL_REFLOW_COUNT("nsCanvasFrame");
|
|
DISPLAY_REFLOW(aPresContext, this, aReflowState, aDesiredSize, aStatus);
|
|
NS_FRAME_TRACE_REFLOW_IN("nsCanvasFrame::Reflow");
|
|
|
|
// Initialize OUT parameter
|
|
aStatus = NS_FRAME_COMPLETE;
|
|
|
|
nsCanvasFrame* prevCanvasFrame = static_cast<nsCanvasFrame*>
|
|
(GetPrevInFlow());
|
|
if (prevCanvasFrame) {
|
|
AutoFrameListPtr overflow(aPresContext,
|
|
prevCanvasFrame->StealOverflowFrames());
|
|
if (overflow) {
|
|
NS_ASSERTION(overflow->OnlyChild(),
|
|
"must have doc root as canvas frame's only child");
|
|
nsContainerFrame::ReparentFrameViewList(*overflow, prevCanvasFrame, this);
|
|
// Prepend overflow to the our child list. There may already be
|
|
// children placeholders for fixed-pos elements, which don't get
|
|
// reflowed but must not be lost until the canvas frame is destroyed.
|
|
mFrames.InsertFrames(this, nullptr, *overflow);
|
|
}
|
|
}
|
|
|
|
// Set our size up front, since some parts of reflow depend on it
|
|
// being already set. Note that the computed height may be
|
|
// unconstrained; that's ok. Consumers should watch out for that.
|
|
SetSize(nsSize(aReflowState.ComputedWidth(), aReflowState.ComputedHeight()));
|
|
|
|
// Reflow our one and only normal child frame. It's either the root
|
|
// element's frame or a placeholder for that frame, if the root element
|
|
// is abs-pos or fixed-pos. We may have additional children which
|
|
// are placeholders for continuations of fixed-pos content, but those
|
|
// don't need to be reflowed. The normal child is always comes before
|
|
// the fixed-pos placeholders, because we insert it at the start
|
|
// of the child list, above.
|
|
nsHTMLReflowMetrics kidDesiredSize(aReflowState);
|
|
if (mFrames.IsEmpty()) {
|
|
// We have no child frame, so return an empty size
|
|
aDesiredSize.Width() = aDesiredSize.Height() = 0;
|
|
} else {
|
|
nsIFrame* kidFrame = mFrames.FirstChild();
|
|
bool kidDirty = (kidFrame->GetStateBits() & NS_FRAME_IS_DIRTY) != 0;
|
|
|
|
nsHTMLReflowState
|
|
kidReflowState(aPresContext, aReflowState, kidFrame,
|
|
aReflowState.AvailableSize(kidFrame->GetWritingMode()));
|
|
|
|
if (aReflowState.IsVResize() &&
|
|
(kidFrame->GetStateBits() & NS_FRAME_CONTAINS_RELATIVE_HEIGHT)) {
|
|
// Tell our kid it's being vertically resized too. Bit of a
|
|
// hack for framesets.
|
|
kidReflowState.SetVResize(true);
|
|
}
|
|
|
|
WritingMode wm = aReflowState.GetWritingMode();
|
|
WritingMode kidWM = kidReflowState.GetWritingMode();
|
|
nscoord containerWidth = aReflowState.ComputedWidth();
|
|
|
|
LogicalMargin margin = kidReflowState.ComputedLogicalMargin();
|
|
LogicalPoint kidPt(kidWM, margin.IStart(kidWM), margin.BStart(kidWM));
|
|
|
|
kidReflowState.ApplyRelativePositioning(&kidPt, containerWidth);
|
|
|
|
// Reflow the frame
|
|
ReflowChild(kidFrame, aPresContext, kidDesiredSize, kidReflowState,
|
|
kidWM, kidPt, containerWidth, 0, aStatus);
|
|
|
|
// Complete the reflow and position and size the child frame
|
|
FinishReflowChild(kidFrame, aPresContext, kidDesiredSize, &kidReflowState,
|
|
kidWM, kidPt, containerWidth, 0);
|
|
|
|
if (!NS_FRAME_IS_FULLY_COMPLETE(aStatus)) {
|
|
nsIFrame* nextFrame = kidFrame->GetNextInFlow();
|
|
NS_ASSERTION(nextFrame || aStatus & NS_FRAME_REFLOW_NEXTINFLOW,
|
|
"If it's incomplete and has no nif yet, it must flag a nif reflow.");
|
|
if (!nextFrame) {
|
|
nextFrame = aPresContext->PresShell()->FrameConstructor()->
|
|
CreateContinuingFrame(aPresContext, kidFrame, this);
|
|
SetOverflowFrames(nsFrameList(nextFrame, nextFrame));
|
|
// Root overflow containers will be normal children of
|
|
// the canvas frame, but that's ok because there
|
|
// aren't any other frames we need to isolate them from
|
|
// during reflow.
|
|
}
|
|
if (NS_FRAME_OVERFLOW_IS_INCOMPLETE(aStatus)) {
|
|
nextFrame->AddStateBits(NS_FRAME_IS_OVERFLOW_CONTAINER);
|
|
}
|
|
}
|
|
|
|
// If the child frame was just inserted, then we're responsible for making sure
|
|
// it repaints
|
|
if (kidDirty) {
|
|
// But we have a new child, which will affect our background, so
|
|
// invalidate our whole rect.
|
|
// Note: Even though we request to be sized to our child's size, our
|
|
// scroll frame ensures that we are always the size of the viewport.
|
|
// Also note: GetPosition() on a CanvasFrame is always going to return
|
|
// (0, 0). We only want to invalidate GetRect() since Get*OverflowRect()
|
|
// could also include overflow to our top and left (out of the viewport)
|
|
// which doesn't need to be painted.
|
|
nsIFrame* viewport = PresContext()->GetPresShell()->GetRootFrame();
|
|
viewport->InvalidateFrame();
|
|
}
|
|
|
|
// Return our desired size. Normally it's what we're told, but
|
|
// sometimes we can be given an unconstrained height (when a window
|
|
// is sizing-to-content), and we should compute our desired height.
|
|
LogicalSize finalSize(wm);
|
|
finalSize.ISize(wm) = aReflowState.ComputedISize();
|
|
if (aReflowState.ComputedBSize() == NS_UNCONSTRAINEDSIZE) {
|
|
finalSize.BSize(wm) = kidFrame->GetLogicalSize(wm).BSize(wm) +
|
|
kidReflowState.ComputedLogicalMargin().BStartEnd(wm);
|
|
} else {
|
|
finalSize.BSize(wm) = aReflowState.ComputedBSize();
|
|
}
|
|
|
|
aDesiredSize.SetSize(wm, finalSize);
|
|
aDesiredSize.SetOverflowAreasToDesiredBounds();
|
|
aDesiredSize.mOverflowAreas.UnionWith(
|
|
kidDesiredSize.mOverflowAreas + kidFrame->GetPosition());
|
|
}
|
|
|
|
if (prevCanvasFrame) {
|
|
ReflowOverflowContainerChildren(aPresContext, aReflowState,
|
|
aDesiredSize.mOverflowAreas, 0,
|
|
aStatus);
|
|
}
|
|
|
|
FinishReflowWithAbsoluteFrames(aPresContext, aDesiredSize, aReflowState, aStatus);
|
|
|
|
NS_FRAME_TRACE_REFLOW_OUT("nsCanvasFrame::Reflow", aStatus);
|
|
NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aDesiredSize);
|
|
}
|
|
|
|
nsIAtom*
|
|
nsCanvasFrame::GetType() const
|
|
{
|
|
return nsGkAtoms::canvasFrame;
|
|
}
|
|
|
|
nsresult
|
|
nsCanvasFrame::GetContentForEvent(WidgetEvent* aEvent,
|
|
nsIContent** aContent)
|
|
{
|
|
NS_ENSURE_ARG_POINTER(aContent);
|
|
nsresult rv = nsFrame::GetContentForEvent(aEvent,
|
|
aContent);
|
|
if (NS_FAILED(rv) || !*aContent) {
|
|
nsIFrame* kid = mFrames.FirstChild();
|
|
if (kid) {
|
|
rv = kid->GetContentForEvent(aEvent,
|
|
aContent);
|
|
}
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
#ifdef DEBUG_FRAME_DUMP
|
|
nsresult
|
|
nsCanvasFrame::GetFrameName(nsAString& aResult) const
|
|
{
|
|
return MakeFrameName(NS_LITERAL_STRING("Canvas"), aResult);
|
|
}
|
|
#endif
|