2014-03-12 01:11:38 +00:00
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/* -*- 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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#include "GeometryUtils.h"
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2014-03-12 01:11:38 +00:00
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#include "mozilla/dom/DOMPointBinding.h"
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2014-03-12 01:11:38 +00:00
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#include "mozilla/dom/GeometryUtilsBinding.h"
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#include "mozilla/dom/Element.h"
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#include "mozilla/dom/Text.h"
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2014-03-12 01:11:38 +00:00
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#include "mozilla/dom/DOMPoint.h"
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2014-03-12 01:11:38 +00:00
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#include "mozilla/dom/DOMQuad.h"
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2014-03-12 01:11:38 +00:00
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#include "mozilla/dom/DOMRect.h"
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2015-09-10 10:24:34 +00:00
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#include "nsContentUtils.h"
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2014-03-12 01:11:38 +00:00
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#include "nsIFrame.h"
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#include "nsGenericDOMDataNode.h"
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#include "nsCSSFrameConstructor.h"
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#include "nsLayoutUtils.h"
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#include "nsSVGUtils.h"
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using namespace mozilla;
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using namespace mozilla::dom;
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namespace mozilla {
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enum GeometryNodeType {
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GEOMETRY_NODE_ELEMENT,
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GEOMETRY_NODE_TEXT,
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GEOMETRY_NODE_DOCUMENT
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};
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static nsIFrame*
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GetFrameForNode(nsINode* aNode, GeometryNodeType aType)
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{
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nsIDocument* doc = aNode->OwnerDoc();
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doc->FlushPendingNotifications(Flush_Layout);
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switch (aType) {
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case GEOMETRY_NODE_ELEMENT:
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return aNode->AsContent()->GetPrimaryFrame();
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case GEOMETRY_NODE_TEXT: {
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nsIPresShell* presShell = doc->GetShell();
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if (presShell) {
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return presShell->FrameConstructor()->EnsureFrameForTextNode(
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static_cast<nsGenericDOMDataNode*>(aNode));
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}
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return nullptr;
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}
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case GEOMETRY_NODE_DOCUMENT: {
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nsIPresShell* presShell = doc->GetShell();
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return presShell ? presShell->GetRootFrame() : nullptr;
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}
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default:
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MOZ_ASSERT(false, "Unknown GeometryNodeType");
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return nullptr;
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}
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}
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static nsIFrame*
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2014-03-12 01:11:38 +00:00
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GetFrameForGeometryNode(const Optional<OwningGeometryNode>& aGeometryNode,
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2014-03-12 01:11:38 +00:00
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nsINode* aDefaultNode)
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{
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if (!aGeometryNode.WasPassed()) {
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return GetFrameForNode(aDefaultNode->OwnerDoc(), GEOMETRY_NODE_DOCUMENT);
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}
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2014-03-12 01:11:38 +00:00
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const OwningGeometryNode& value = aGeometryNode.Value();
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2014-03-12 01:11:38 +00:00
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if (value.IsElement()) {
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return GetFrameForNode(value.GetAsElement(), GEOMETRY_NODE_ELEMENT);
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}
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if (value.IsDocument()) {
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return GetFrameForNode(value.GetAsDocument(), GEOMETRY_NODE_DOCUMENT);
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}
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return GetFrameForNode(value.GetAsText(), GEOMETRY_NODE_TEXT);
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}
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2014-03-12 01:11:38 +00:00
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static nsIFrame*
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GetFrameForGeometryNode(const GeometryNode& aGeometryNode)
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{
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if (aGeometryNode.IsElement()) {
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return GetFrameForNode(&aGeometryNode.GetAsElement(), GEOMETRY_NODE_ELEMENT);
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}
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if (aGeometryNode.IsDocument()) {
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return GetFrameForNode(&aGeometryNode.GetAsDocument(), GEOMETRY_NODE_DOCUMENT);
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}
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return GetFrameForNode(&aGeometryNode.GetAsText(), GEOMETRY_NODE_TEXT);
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}
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2014-03-12 01:11:38 +00:00
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static nsIFrame*
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GetFrameForNode(nsINode* aNode)
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{
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if (aNode->IsElement()) {
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return GetFrameForNode(aNode, GEOMETRY_NODE_ELEMENT);
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}
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if (aNode == aNode->OwnerDoc()) {
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return GetFrameForNode(aNode, GEOMETRY_NODE_DOCUMENT);
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}
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NS_ASSERTION(aNode->IsNodeOfType(nsINode::eTEXT), "Unknown node type");
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return GetFrameForNode(aNode, GEOMETRY_NODE_TEXT);
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}
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static nsIFrame*
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2014-03-12 01:11:38 +00:00
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GetFirstNonAnonymousFrameForGeometryNode(const Optional<OwningGeometryNode>& aNode,
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2014-03-12 01:11:38 +00:00
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nsINode* aDefaultNode)
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{
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nsIFrame* f = GetFrameForGeometryNode(aNode, aDefaultNode);
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if (f) {
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f = nsLayoutUtils::GetFirstNonAnonymousFrame(f);
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}
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return f;
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}
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2014-03-12 01:11:38 +00:00
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static nsIFrame*
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GetFirstNonAnonymousFrameForGeometryNode(const GeometryNode& aNode)
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{
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nsIFrame* f = GetFrameForGeometryNode(aNode);
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if (f) {
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f = nsLayoutUtils::GetFirstNonAnonymousFrame(f);
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}
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return f;
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}
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static nsIFrame*
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GetFirstNonAnonymousFrameForNode(nsINode* aNode)
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{
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nsIFrame* f = GetFrameForNode(aNode);
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if (f) {
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f = nsLayoutUtils::GetFirstNonAnonymousFrame(f);
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}
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return f;
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}
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2014-03-12 01:11:38 +00:00
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/**
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* This can modify aFrame to point to a different frame. This is needed to
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* handle SVG, where SVG elements can only compute a rect that's valid with
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* respect to the "outer SVG" frame.
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*/
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static nsRect
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GetBoxRectForFrame(nsIFrame** aFrame, CSSBoxType aType)
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{
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nsRect r;
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nsIFrame* f = nsSVGUtils::GetOuterSVGFrameAndCoveredRegion(*aFrame, &r);
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if (f) {
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// For SVG, the BoxType is ignored.
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*aFrame = f;
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return r;
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}
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f = *aFrame;
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switch (aType) {
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case CSSBoxType::Content: r = f->GetContentRectRelativeToSelf(); break;
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case CSSBoxType::Padding: r = f->GetPaddingRectRelativeToSelf(); break;
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case CSSBoxType::Border: r = nsRect(nsPoint(0, 0), f->GetSize()); break;
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case CSSBoxType::Margin: {
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r = nsRect(nsPoint(0, 0), f->GetSize());
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r.Inflate(f->GetUsedMargin());
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break;
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}
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default: MOZ_ASSERT(false, "unknown box type"); return r;
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}
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return r;
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}
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class AccumulateQuadCallback : public nsLayoutUtils::BoxCallback {
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public:
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AccumulateQuadCallback(nsISupports* aParentObject,
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2015-10-18 05:24:48 +00:00
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nsTArray<RefPtr<DOMQuad> >& aResult,
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2014-03-12 01:11:38 +00:00
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nsIFrame* aRelativeToFrame,
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const nsPoint& aRelativeToBoxTopLeft,
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CSSBoxType aBoxType)
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: mParentObject(aParentObject)
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, mResult(aResult)
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, mRelativeToFrame(aRelativeToFrame)
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, mRelativeToBoxTopLeft(aRelativeToBoxTopLeft)
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, mBoxType(aBoxType)
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{
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2016-02-02 09:47:15 +00:00
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if (mBoxType == CSSBoxType::Margin) {
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// Don't include the caption margin when computing margins for a
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// table
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mIncludeCaptionBoxForTable = false;
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}
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2014-03-12 01:11:38 +00:00
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}
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2015-03-21 16:28:04 +00:00
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virtual void AddBox(nsIFrame* aFrame) override
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2014-03-12 01:11:38 +00:00
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{
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nsIFrame* f = aFrame;
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2016-02-02 09:47:15 +00:00
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if (mBoxType == CSSBoxType::Margin &&
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f->GetType() == nsGkAtoms::tableFrame) {
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// Margin boxes for table frames should be taken from the outer table
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// frame, since that has the margin.
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f = f->GetParent();
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}
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2014-03-12 01:11:38 +00:00
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nsRect box = GetBoxRectForFrame(&f, mBoxType);
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nsPoint appUnits[4] =
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{ box.TopLeft(), box.TopRight(), box.BottomRight(), box.BottomLeft() };
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CSSPoint points[4];
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for (uint32_t i = 0; i < 4; ++i) {
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points[i] = CSSPoint(nsPresContext::AppUnitsToFloatCSSPixels(appUnits[i].x),
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nsPresContext::AppUnitsToFloatCSSPixels(appUnits[i].y));
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}
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nsLayoutUtils::TransformResult rv =
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nsLayoutUtils::TransformPoints(f, mRelativeToFrame, 4, points);
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if (rv == nsLayoutUtils::TRANSFORM_SUCCEEDED) {
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CSSPoint delta(nsPresContext::AppUnitsToFloatCSSPixels(mRelativeToBoxTopLeft.x),
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nsPresContext::AppUnitsToFloatCSSPixels(mRelativeToBoxTopLeft.y));
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for (uint32_t i = 0; i < 4; ++i) {
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points[i] -= delta;
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}
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} else {
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PodArrayZero(points);
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}
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mResult.AppendElement(new DOMQuad(mParentObject, points));
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}
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nsISupports* mParentObject;
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2015-10-18 05:24:48 +00:00
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nsTArray<RefPtr<DOMQuad> >& mResult;
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2014-03-12 01:11:38 +00:00
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nsIFrame* mRelativeToFrame;
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nsPoint mRelativeToBoxTopLeft;
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CSSBoxType mBoxType;
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};
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static nsPresContext*
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FindTopLevelPresContext(nsPresContext* aPC)
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{
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bool isChrome = aPC->IsChrome();
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nsPresContext* pc = aPC;
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for (;;) {
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nsPresContext* parent = pc->GetParentPresContext();
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if (!parent || parent->IsChrome() != isChrome) {
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return pc;
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}
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pc = parent;
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}
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}
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static bool
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CheckFramesInSameTopLevelBrowsingContext(nsIFrame* aFrame1, nsIFrame* aFrame2)
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{
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nsPresContext* pc1 = aFrame1->PresContext();
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nsPresContext* pc2 = aFrame2->PresContext();
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if (pc1 == pc2) {
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return true;
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}
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if (nsContentUtils::IsCallerChrome()) {
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return true;
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}
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if (FindTopLevelPresContext(pc1) == FindTopLevelPresContext(pc2)) {
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return true;
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}
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return false;
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}
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void GetBoxQuads(nsINode* aNode,
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const dom::BoxQuadOptions& aOptions,
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2015-10-18 05:24:48 +00:00
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nsTArray<RefPtr<DOMQuad> >& aResult,
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2014-03-12 01:11:38 +00:00
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ErrorResult& aRv)
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{
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nsIFrame* frame = GetFrameForNode(aNode);
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if (!frame) {
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// No boxes to return
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return;
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}
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2014-05-12 20:25:22 +00:00
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nsWeakFrame weakFrame(frame);
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2014-03-12 01:11:38 +00:00
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nsIDocument* ownerDoc = aNode->OwnerDoc();
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nsIFrame* relativeToFrame =
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GetFirstNonAnonymousFrameForGeometryNode(aOptions.mRelativeTo, ownerDoc);
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2014-05-12 20:25:22 +00:00
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// The first frame might be destroyed now if the above call lead to an
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// EnsureFrameForTextNode call. We need to get the first frame again
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// when that happens and re-check it.
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if (!weakFrame.IsAlive()) {
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frame = GetFrameForNode(aNode);
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if (!frame) {
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// No boxes to return
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return;
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}
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}
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2014-03-12 01:11:38 +00:00
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if (!relativeToFrame) {
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aRv.Throw(NS_ERROR_DOM_NOT_FOUND_ERR);
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return;
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}
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if (!CheckFramesInSameTopLevelBrowsingContext(frame, relativeToFrame)) {
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aRv.Throw(NS_ERROR_DOM_NOT_FOUND_ERR);
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return;
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}
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// GetBoxRectForFrame can modify relativeToFrame so call it first.
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nsPoint relativeToTopLeft =
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GetBoxRectForFrame(&relativeToFrame, CSSBoxType::Border).TopLeft();
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AccumulateQuadCallback callback(ownerDoc, aResult, relativeToFrame,
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relativeToTopLeft, aOptions.mBox);
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nsLayoutUtils::GetAllInFlowBoxes(frame, &callback);
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}
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2014-03-12 01:11:38 +00:00
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static void
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TransformPoints(nsINode* aTo, const GeometryNode& aFrom,
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uint32_t aPointCount, CSSPoint* aPoints,
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const ConvertCoordinateOptions& aOptions, ErrorResult& aRv)
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{
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nsIFrame* fromFrame = GetFirstNonAnonymousFrameForGeometryNode(aFrom);
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2014-05-12 20:25:22 +00:00
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nsWeakFrame weakFrame(fromFrame);
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2014-03-12 01:11:38 +00:00
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nsIFrame* toFrame = GetFirstNonAnonymousFrameForNode(aTo);
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2014-05-12 20:25:22 +00:00
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// The first frame might be destroyed now if the above call lead to an
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// EnsureFrameForTextNode call. We need to get the first frame again
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// when that happens.
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if (fromFrame && !weakFrame.IsAlive()) {
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fromFrame = GetFirstNonAnonymousFrameForGeometryNode(aFrom);
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}
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2014-03-12 01:11:38 +00:00
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if (!fromFrame || !toFrame) {
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aRv.Throw(NS_ERROR_DOM_NOT_FOUND_ERR);
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return;
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}
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if (!CheckFramesInSameTopLevelBrowsingContext(fromFrame, toFrame)) {
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aRv.Throw(NS_ERROR_DOM_NOT_FOUND_ERR);
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return;
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}
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nsPoint fromOffset = GetBoxRectForFrame(&fromFrame, aOptions.mFromBox).TopLeft();
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nsPoint toOffset = GetBoxRectForFrame(&toFrame, aOptions.mToBox).TopLeft();
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CSSPoint fromOffsetGfx(nsPresContext::AppUnitsToFloatCSSPixels(fromOffset.x),
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nsPresContext::AppUnitsToFloatCSSPixels(fromOffset.y));
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for (uint32_t i = 0; i < aPointCount; ++i) {
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aPoints[i] += fromOffsetGfx;
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}
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nsLayoutUtils::TransformResult rv =
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nsLayoutUtils::TransformPoints(fromFrame, toFrame, aPointCount, aPoints);
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if (rv == nsLayoutUtils::TRANSFORM_SUCCEEDED) {
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CSSPoint toOffsetGfx(nsPresContext::AppUnitsToFloatCSSPixels(toOffset.x),
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nsPresContext::AppUnitsToFloatCSSPixels(toOffset.y));
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for (uint32_t i = 0; i < aPointCount; ++i) {
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aPoints[i] -= toOffsetGfx;
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}
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} else {
|
|
|
|
PodZero(aPoints, aPointCount);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
already_AddRefed<DOMQuad>
|
|
|
|
ConvertQuadFromNode(nsINode* aTo, dom::DOMQuad& aQuad,
|
|
|
|
const GeometryNode& aFrom,
|
|
|
|
const dom::ConvertCoordinateOptions& aOptions,
|
|
|
|
ErrorResult& aRv)
|
|
|
|
{
|
|
|
|
CSSPoint points[4];
|
|
|
|
for (uint32_t i = 0; i < 4; ++i) {
|
|
|
|
DOMPoint* p = aQuad.Point(i);
|
|
|
|
if (p->W() != 1.0 || p->Z() != 0.0) {
|
|
|
|
aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
|
|
|
|
return nullptr;
|
|
|
|
}
|
|
|
|
points[i] = CSSPoint(p->X(), p->Y());
|
|
|
|
}
|
|
|
|
TransformPoints(aTo, aFrom, 4, points, aOptions, aRv);
|
|
|
|
if (aRv.Failed()) {
|
|
|
|
return nullptr;
|
|
|
|
}
|
2015-10-18 05:24:48 +00:00
|
|
|
RefPtr<DOMQuad> result = new DOMQuad(aTo->GetParentObject().mObject, points);
|
2014-03-12 01:11:38 +00:00
|
|
|
return result.forget();
|
|
|
|
}
|
|
|
|
|
|
|
|
already_AddRefed<DOMQuad>
|
|
|
|
ConvertRectFromNode(nsINode* aTo, dom::DOMRectReadOnly& aRect,
|
|
|
|
const GeometryNode& aFrom,
|
|
|
|
const dom::ConvertCoordinateOptions& aOptions,
|
|
|
|
ErrorResult& aRv)
|
|
|
|
{
|
|
|
|
CSSPoint points[4];
|
|
|
|
double x = aRect.X(), y = aRect.Y(), w = aRect.Width(), h = aRect.Height();
|
|
|
|
points[0] = CSSPoint(x, y);
|
|
|
|
points[1] = CSSPoint(x + w, y);
|
|
|
|
points[2] = CSSPoint(x + w, y + h);
|
|
|
|
points[3] = CSSPoint(x, y + h);
|
|
|
|
TransformPoints(aTo, aFrom, 4, points, aOptions, aRv);
|
|
|
|
if (aRv.Failed()) {
|
|
|
|
return nullptr;
|
|
|
|
}
|
2015-10-18 05:24:48 +00:00
|
|
|
RefPtr<DOMQuad> result = new DOMQuad(aTo->GetParentObject().mObject, points);
|
2014-03-12 01:11:38 +00:00
|
|
|
return result.forget();
|
|
|
|
}
|
|
|
|
|
|
|
|
already_AddRefed<DOMPoint>
|
|
|
|
ConvertPointFromNode(nsINode* aTo, const dom::DOMPointInit& aPoint,
|
|
|
|
const GeometryNode& aFrom,
|
|
|
|
const dom::ConvertCoordinateOptions& aOptions,
|
|
|
|
ErrorResult& aRv)
|
|
|
|
{
|
|
|
|
if (aPoint.mW != 1.0 || aPoint.mZ != 0.0) {
|
|
|
|
aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
|
|
|
|
return nullptr;
|
|
|
|
}
|
|
|
|
CSSPoint point(aPoint.mX, aPoint.mY);
|
|
|
|
TransformPoints(aTo, aFrom, 1, &point, aOptions, aRv);
|
|
|
|
if (aRv.Failed()) {
|
|
|
|
return nullptr;
|
|
|
|
}
|
2015-10-18 05:24:48 +00:00
|
|
|
RefPtr<DOMPoint> result = new DOMPoint(aTo->GetParentObject().mObject, point.x, point.y);
|
2014-03-12 01:11:38 +00:00
|
|
|
return result.forget();
|
|
|
|
}
|
|
|
|
|
2015-07-13 15:25:42 +00:00
|
|
|
} // namespace mozilla
|