зеркало из https://github.com/mozilla/gecko-dev.git
801 строка
25 KiB
C++
801 строка
25 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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// Main header first:
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// This is also necessary to ensure our definition of M_SQRT1_2 is picked up
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#include "SVGContentUtils.h"
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// Keep others in (case-insensitive) order:
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#include "gfx2DGlue.h"
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#include "gfxMatrix.h"
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#include "gfxPlatform.h"
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#include "gfxSVGGlyphs.h"
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#include "mozilla/gfx/2D.h"
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#include "mozilla/dom/SVGSVGElement.h"
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#include "mozilla/RefPtr.h"
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#include "nsComputedDOMStyle.h"
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#include "nsFontMetrics.h"
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#include "nsIFrame.h"
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#include "nsIScriptError.h"
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#include "nsLayoutUtils.h"
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#include "SVGAnimationElement.h"
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#include "SVGAnimatedPreserveAspectRatio.h"
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#include "nsContentUtils.h"
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#include "mozilla/gfx/2D.h"
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#include "mozilla/gfx/Types.h"
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#include "mozilla/FloatingPoint.h"
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#include "nsStyleContext.h"
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#include "nsSVGPathDataParser.h"
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#include "SVGPathData.h"
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#include "SVGPathElement.h"
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using namespace mozilla;
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using namespace mozilla::dom;
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using namespace mozilla::gfx;
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SVGSVGElement*
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SVGContentUtils::GetOuterSVGElement(nsSVGElement *aSVGElement)
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{
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nsIContent *element = nullptr;
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nsIContent *ancestor = aSVGElement->GetFlattenedTreeParent();
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while (ancestor && ancestor->IsSVG() &&
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ancestor->Tag() != nsGkAtoms::foreignObject) {
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element = ancestor;
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ancestor = element->GetFlattenedTreeParent();
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}
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if (element && element->Tag() == nsGkAtoms::svg) {
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return static_cast<SVGSVGElement*>(element);
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}
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return nullptr;
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}
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void
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SVGContentUtils::ActivateByHyperlink(nsIContent *aContent)
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{
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NS_ABORT_IF_FALSE(aContent->IsNodeOfType(nsINode::eANIMATION),
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"Expecting an animation element");
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static_cast<SVGAnimationElement*>(aContent)->ActivateByHyperlink();
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}
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enum DashState {
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eDashedStroke,
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eContinuousStroke, //< all dashes, no gaps
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eNoStroke //< all gaps, no dashes
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};
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static DashState
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GetStrokeDashData(SVGContentUtils::AutoStrokeOptions* aStrokeOptions,
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nsSVGElement* aElement,
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const nsStyleSVG* aStyleSVG,
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gfxTextContextPaint *aContextPaint)
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{
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size_t dashArrayLength;
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Float totalLengthOfDashes = 0.0, totalLengthOfGaps = 0.0;
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if (aContextPaint && aStyleSVG->mStrokeDasharrayFromObject) {
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const FallibleTArray<gfxFloat>& dashSrc = aContextPaint->GetStrokeDashArray();
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dashArrayLength = dashSrc.Length();
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if (dashArrayLength <= 0) {
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return eContinuousStroke;
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}
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Float* dashPattern = aStrokeOptions->InitDashPattern(dashArrayLength);
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if (!dashPattern) {
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return eContinuousStroke;
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}
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for (size_t i = 0; i < dashArrayLength; i++) {
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if (dashSrc[i] < 0.0) {
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return eContinuousStroke; // invalid
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}
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dashPattern[i] = Float(dashSrc[i]);
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(i % 2 ? totalLengthOfGaps : totalLengthOfDashes) += dashSrc[i];
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}
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} else {
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const nsStyleCoord *dasharray = aStyleSVG->mStrokeDasharray;
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dashArrayLength = aStyleSVG->mStrokeDasharrayLength;
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if (dashArrayLength <= 0) {
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return eContinuousStroke;
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}
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Float pathScale = 1.0;
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if (aElement->Tag() == nsGkAtoms::path) {
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pathScale = static_cast<SVGPathElement*>(aElement)->
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GetPathLengthScale(SVGPathElement::eForStroking);
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if (pathScale <= 0) {
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return eContinuousStroke;
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}
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}
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Float* dashPattern = aStrokeOptions->InitDashPattern(dashArrayLength);
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if (!dashPattern) {
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return eContinuousStroke;
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}
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for (uint32_t i = 0; i < dashArrayLength; i++) {
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Float dashLength =
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SVGContentUtils::CoordToFloat(aElement, dasharray[i]) * pathScale;
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if (dashLength < 0.0) {
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return eContinuousStroke; // invalid
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}
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dashPattern[i] = dashLength;
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(i % 2 ? totalLengthOfGaps : totalLengthOfDashes) += dashLength;
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}
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}
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// Now that aStrokeOptions.mDashPattern is fully initialized (we didn't
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// return early above) we can safely set mDashLength:
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aStrokeOptions->mDashLength = dashArrayLength;
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if ((dashArrayLength % 2) == 1) {
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// If we have a dash pattern with an odd number of lengths the pattern
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// repeats a second time, per the SVG spec., and as implemented by Moz2D.
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// When deciding whether to return eNoStroke or eContinuousStroke below we
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// need to take into account that in the repeat pattern the dashes become
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// gaps, and the gaps become dashes.
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Float origTotalLengthOfDashes = totalLengthOfDashes;
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totalLengthOfDashes += totalLengthOfGaps;
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totalLengthOfGaps += origTotalLengthOfDashes;
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}
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if (totalLengthOfDashes <= 0 || totalLengthOfGaps <= 0) {
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if (totalLengthOfGaps > 0 && totalLengthOfDashes <= 0) {
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return eNoStroke;
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}
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return eContinuousStroke;
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}
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if (aContextPaint && aStyleSVG->mStrokeDashoffsetFromObject) {
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aStrokeOptions->mDashOffset = Float(aContextPaint->GetStrokeDashOffset());
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} else {
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aStrokeOptions->mDashOffset =
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SVGContentUtils::CoordToFloat(aElement, aStyleSVG->mStrokeDashoffset);
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}
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return eDashedStroke;
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}
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void
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SVGContentUtils::GetStrokeOptions(AutoStrokeOptions* aStrokeOptions,
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nsSVGElement* aElement,
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nsStyleContext* aStyleContext,
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gfxTextContextPaint *aContextPaint,
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StrokeOptionFlags aFlags)
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{
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nsRefPtr<nsStyleContext> styleContext;
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if (aStyleContext) {
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styleContext = aStyleContext;
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} else {
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styleContext =
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nsComputedDOMStyle::GetStyleContextForElementNoFlush(aElement, nullptr,
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nullptr);
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}
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if (!styleContext) {
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return;
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}
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const nsStyleSVG* styleSVG = styleContext->StyleSVG();
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if (aFlags != eIgnoreStrokeDashing) {
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DashState dashState =
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GetStrokeDashData(aStrokeOptions, aElement, styleSVG, aContextPaint);
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if (dashState == eNoStroke) {
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// Hopefully this will shortcircuit any stroke operations:
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aStrokeOptions->mLineWidth = 0;
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return;
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}
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if (dashState == eContinuousStroke && aStrokeOptions->mDashPattern) {
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// Prevent our caller from wasting time looking at a pattern without gaps:
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aStrokeOptions->DiscardDashPattern();
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}
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}
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aStrokeOptions->mLineWidth =
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GetStrokeWidth(aElement, styleContext, aContextPaint);
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aStrokeOptions->mMiterLimit = Float(styleSVG->mStrokeMiterlimit);
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switch (styleSVG->mStrokeLinejoin) {
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case NS_STYLE_STROKE_LINEJOIN_MITER:
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aStrokeOptions->mLineJoin = JoinStyle::MITER;
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break;
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case NS_STYLE_STROKE_LINEJOIN_ROUND:
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aStrokeOptions->mLineJoin = JoinStyle::ROUND;
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break;
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case NS_STYLE_STROKE_LINEJOIN_BEVEL:
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aStrokeOptions->mLineJoin = JoinStyle::BEVEL;
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break;
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}
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switch (styleSVG->mStrokeLinecap) {
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case NS_STYLE_STROKE_LINECAP_BUTT:
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aStrokeOptions->mLineCap = CapStyle::BUTT;
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break;
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case NS_STYLE_STROKE_LINECAP_ROUND:
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aStrokeOptions->mLineCap = CapStyle::ROUND;
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break;
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case NS_STYLE_STROKE_LINECAP_SQUARE:
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aStrokeOptions->mLineCap = CapStyle::SQUARE;
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break;
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}
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}
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Float
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SVGContentUtils::GetStrokeWidth(nsSVGElement* aElement,
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nsStyleContext* aStyleContext,
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gfxTextContextPaint *aContextPaint)
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{
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nsRefPtr<nsStyleContext> styleContext;
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if (aStyleContext) {
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styleContext = aStyleContext;
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} else {
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styleContext =
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nsComputedDOMStyle::GetStyleContextForElementNoFlush(aElement, nullptr,
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nullptr);
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}
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if (!styleContext) {
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return 0.0f;
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}
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const nsStyleSVG* styleSVG = styleContext->StyleSVG();
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if (aContextPaint && styleSVG->mStrokeWidthFromObject) {
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return aContextPaint->GetStrokeWidth();
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}
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return SVGContentUtils::CoordToFloat(aElement, styleSVG->mStrokeWidth);
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}
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float
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SVGContentUtils::GetFontSize(Element *aElement)
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{
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if (!aElement)
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return 1.0f;
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nsRefPtr<nsStyleContext> styleContext =
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nsComputedDOMStyle::GetStyleContextForElementNoFlush(aElement,
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nullptr, nullptr);
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if (!styleContext) {
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// ReportToConsole
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NS_WARNING("Couldn't get style context for content in GetFontStyle");
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return 1.0f;
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}
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return GetFontSize(styleContext);
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}
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float
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SVGContentUtils::GetFontSize(nsIFrame *aFrame)
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{
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NS_ABORT_IF_FALSE(aFrame, "NULL frame in GetFontSize");
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return GetFontSize(aFrame->StyleContext());
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}
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float
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SVGContentUtils::GetFontSize(nsStyleContext *aStyleContext)
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{
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NS_ABORT_IF_FALSE(aStyleContext, "NULL style context in GetFontSize");
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nsPresContext *presContext = aStyleContext->PresContext();
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NS_ABORT_IF_FALSE(presContext, "NULL pres context in GetFontSize");
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nscoord fontSize = aStyleContext->StyleFont()->mSize;
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return nsPresContext::AppUnitsToFloatCSSPixels(fontSize) /
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presContext->TextZoom();
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}
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float
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SVGContentUtils::GetFontXHeight(Element *aElement)
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{
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if (!aElement)
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return 1.0f;
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nsRefPtr<nsStyleContext> styleContext =
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nsComputedDOMStyle::GetStyleContextForElementNoFlush(aElement,
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nullptr, nullptr);
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if (!styleContext) {
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// ReportToConsole
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NS_WARNING("Couldn't get style context for content in GetFontStyle");
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return 1.0f;
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}
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return GetFontXHeight(styleContext);
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}
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float
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SVGContentUtils::GetFontXHeight(nsIFrame *aFrame)
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{
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NS_ABORT_IF_FALSE(aFrame, "NULL frame in GetFontXHeight");
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return GetFontXHeight(aFrame->StyleContext());
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}
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float
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SVGContentUtils::GetFontXHeight(nsStyleContext *aStyleContext)
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{
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NS_ABORT_IF_FALSE(aStyleContext, "NULL style context in GetFontXHeight");
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nsPresContext *presContext = aStyleContext->PresContext();
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NS_ABORT_IF_FALSE(presContext, "NULL pres context in GetFontXHeight");
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nsRefPtr<nsFontMetrics> fontMetrics;
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nsLayoutUtils::GetFontMetricsForStyleContext(aStyleContext,
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getter_AddRefs(fontMetrics));
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if (!fontMetrics) {
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// ReportToConsole
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NS_WARNING("no FontMetrics in GetFontXHeight()");
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return 1.0f;
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}
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nscoord xHeight = fontMetrics->XHeight();
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return nsPresContext::AppUnitsToFloatCSSPixels(xHeight) /
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presContext->TextZoom();
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}
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nsresult
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SVGContentUtils::ReportToConsole(nsIDocument* doc,
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const char* aWarning,
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const char16_t **aParams,
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uint32_t aParamsLength)
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{
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return nsContentUtils::ReportToConsole(nsIScriptError::warningFlag,
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NS_LITERAL_CSTRING("SVG"), doc,
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nsContentUtils::eSVG_PROPERTIES,
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aWarning,
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aParams, aParamsLength);
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}
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bool
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SVGContentUtils::EstablishesViewport(nsIContent *aContent)
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{
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// Although SVG 1.1 states that <image> is an element that establishes a
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// viewport, this is really only for the document it references, not
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// for any child content, which is what this function is used for.
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return aContent && aContent->IsSVG() &&
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(aContent->Tag() == nsGkAtoms::svg ||
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aContent->Tag() == nsGkAtoms::foreignObject ||
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aContent->Tag() == nsGkAtoms::symbol);
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}
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nsSVGElement*
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SVGContentUtils::GetNearestViewportElement(nsIContent *aContent)
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{
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nsIContent *element = aContent->GetFlattenedTreeParent();
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while (element && element->IsSVG()) {
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if (EstablishesViewport(element)) {
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if (element->Tag() == nsGkAtoms::foreignObject) {
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return nullptr;
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}
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return static_cast<nsSVGElement*>(element);
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}
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element = element->GetFlattenedTreeParent();
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}
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return nullptr;
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}
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static gfx::Matrix
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GetCTMInternal(nsSVGElement *aElement, bool aScreenCTM, bool aHaveRecursed)
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{
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gfxMatrix matrix = aElement->PrependLocalTransformsTo(gfxMatrix(),
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aHaveRecursed ? nsSVGElement::eAllTransforms : nsSVGElement::eUserSpaceToParent);
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nsSVGElement *element = aElement;
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nsIContent *ancestor = aElement->GetFlattenedTreeParent();
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while (ancestor && ancestor->IsSVG() &&
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ancestor->Tag() != nsGkAtoms::foreignObject) {
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element = static_cast<nsSVGElement*>(ancestor);
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matrix *= element->PrependLocalTransformsTo(gfxMatrix()); // i.e. *A*ppend
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if (!aScreenCTM && SVGContentUtils::EstablishesViewport(element)) {
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if (!element->NodeInfo()->Equals(nsGkAtoms::svg, kNameSpaceID_SVG) &&
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!element->NodeInfo()->Equals(nsGkAtoms::symbol, kNameSpaceID_SVG)) {
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NS_ERROR("New (SVG > 1.1) SVG viewport establishing element?");
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return gfx::Matrix(0.0, 0.0, 0.0, 0.0, 0.0, 0.0); // singular
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}
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// XXX spec seems to say x,y translation should be undone for IsInnerSVG
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return gfx::ToMatrix(matrix);
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}
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ancestor = ancestor->GetFlattenedTreeParent();
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}
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if (!aScreenCTM) {
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// didn't find a nearestViewportElement
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return gfx::Matrix(0.0, 0.0, 0.0, 0.0, 0.0, 0.0); // singular
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}
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if (element->Tag() != nsGkAtoms::svg) {
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// Not a valid SVG fragment
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return gfx::Matrix(0.0, 0.0, 0.0, 0.0, 0.0, 0.0); // singular
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}
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if (element == aElement && !aHaveRecursed) {
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// We get here when getScreenCTM() is called on an outer-<svg>.
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// Consistency with other elements would have us include only the
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// eFromUserSpace transforms, but we include the eAllTransforms
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// transforms in this case since that's what we've been doing for
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// a while, and it keeps us consistent with WebKit and Opera (if not
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// really with the ambiguous spec).
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matrix = aElement->PrependLocalTransformsTo(gfxMatrix());
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}
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if (!ancestor || !ancestor->IsElement()) {
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return gfx::ToMatrix(matrix);
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}
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if (ancestor->IsSVG()) {
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return
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gfx::ToMatrix(matrix) * GetCTMInternal(static_cast<nsSVGElement*>(ancestor), true, true);
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}
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// XXX this does not take into account CSS transform, or that the non-SVG
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// content that we've hit may itself be inside an SVG foreignObject higher up
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nsIDocument* currentDoc = aElement->GetComposedDoc();
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float x = 0.0f, y = 0.0f;
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if (currentDoc && element->NodeInfo()->Equals(nsGkAtoms::svg, kNameSpaceID_SVG)) {
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nsIPresShell *presShell = currentDoc->GetShell();
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if (presShell) {
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nsIFrame* frame = element->GetPrimaryFrame();
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nsIFrame* ancestorFrame = presShell->GetRootFrame();
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if (frame && ancestorFrame) {
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nsPoint point = frame->GetOffsetTo(ancestorFrame);
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x = nsPresContext::AppUnitsToFloatCSSPixels(point.x);
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y = nsPresContext::AppUnitsToFloatCSSPixels(point.y);
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}
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}
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}
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return ToMatrix(matrix).PostTranslate(x, y);
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}
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gfx::Matrix
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SVGContentUtils::GetCTM(nsSVGElement *aElement, bool aScreenCTM)
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{
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return GetCTMInternal(aElement, aScreenCTM, false);
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}
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double
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SVGContentUtils::ComputeNormalizedHypotenuse(double aWidth, double aHeight)
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{
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return sqrt((aWidth*aWidth + aHeight*aHeight)/2);
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}
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float
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SVGContentUtils::AngleBisect(float a1, float a2)
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{
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float delta = fmod(a2 - a1, static_cast<float>(2*M_PI));
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if (delta < 0) {
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delta += static_cast<float>(2*M_PI);
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}
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/* delta is now the angle from a1 around to a2, in the range [0, 2*M_PI) */
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float r = a1 + delta/2;
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if (delta >= M_PI) {
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/* the arc from a2 to a1 is smaller, so use the ray on that side */
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r += static_cast<float>(M_PI);
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}
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return r;
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}
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gfx::Matrix
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SVGContentUtils::GetViewBoxTransform(float aViewportWidth, float aViewportHeight,
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float aViewboxX, float aViewboxY,
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float aViewboxWidth, float aViewboxHeight,
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const SVGAnimatedPreserveAspectRatio &aPreserveAspectRatio)
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{
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return GetViewBoxTransform(aViewportWidth, aViewportHeight,
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aViewboxX, aViewboxY,
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aViewboxWidth, aViewboxHeight,
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aPreserveAspectRatio.GetAnimValue());
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}
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gfx::Matrix
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SVGContentUtils::GetViewBoxTransform(float aViewportWidth, float aViewportHeight,
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float aViewboxX, float aViewboxY,
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float aViewboxWidth, float aViewboxHeight,
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const SVGPreserveAspectRatio &aPreserveAspectRatio)
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{
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NS_ASSERTION(aViewportWidth >= 0, "viewport width must be nonnegative!");
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NS_ASSERTION(aViewportHeight >= 0, "viewport height must be nonnegative!");
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NS_ASSERTION(aViewboxWidth > 0, "viewBox width must be greater than zero!");
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NS_ASSERTION(aViewboxHeight > 0, "viewBox height must be greater than zero!");
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SVGAlign align = aPreserveAspectRatio.GetAlign();
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SVGMeetOrSlice meetOrSlice = aPreserveAspectRatio.GetMeetOrSlice();
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// default to the defaults
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if (align == SVG_PRESERVEASPECTRATIO_UNKNOWN)
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align = SVG_PRESERVEASPECTRATIO_XMIDYMID;
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if (meetOrSlice == SVG_MEETORSLICE_UNKNOWN)
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meetOrSlice = SVG_MEETORSLICE_MEET;
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float a, d, e, f;
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a = aViewportWidth / aViewboxWidth;
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d = aViewportHeight / aViewboxHeight;
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e = 0.0f;
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f = 0.0f;
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if (align != SVG_PRESERVEASPECTRATIO_NONE &&
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a != d) {
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if ((meetOrSlice == SVG_MEETORSLICE_MEET && a < d) ||
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(meetOrSlice == SVG_MEETORSLICE_SLICE && d < a)) {
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d = a;
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switch (align) {
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case SVG_PRESERVEASPECTRATIO_XMINYMIN:
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case SVG_PRESERVEASPECTRATIO_XMIDYMIN:
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case SVG_PRESERVEASPECTRATIO_XMAXYMIN:
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break;
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case SVG_PRESERVEASPECTRATIO_XMINYMID:
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case SVG_PRESERVEASPECTRATIO_XMIDYMID:
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case SVG_PRESERVEASPECTRATIO_XMAXYMID:
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f = (aViewportHeight - a * aViewboxHeight) / 2.0f;
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break;
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case SVG_PRESERVEASPECTRATIO_XMINYMAX:
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case SVG_PRESERVEASPECTRATIO_XMIDYMAX:
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case SVG_PRESERVEASPECTRATIO_XMAXYMAX:
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f = aViewportHeight - a * aViewboxHeight;
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break;
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default:
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NS_NOTREACHED("Unknown value for align");
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}
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}
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else if (
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(meetOrSlice == SVG_MEETORSLICE_MEET &&
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d < a) ||
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(meetOrSlice == SVG_MEETORSLICE_SLICE &&
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a < d)) {
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a = d;
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switch (align) {
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case SVG_PRESERVEASPECTRATIO_XMINYMIN:
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case SVG_PRESERVEASPECTRATIO_XMINYMID:
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case SVG_PRESERVEASPECTRATIO_XMINYMAX:
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break;
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case SVG_PRESERVEASPECTRATIO_XMIDYMIN:
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case SVG_PRESERVEASPECTRATIO_XMIDYMID:
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case SVG_PRESERVEASPECTRATIO_XMIDYMAX:
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e = (aViewportWidth - a * aViewboxWidth) / 2.0f;
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break;
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case SVG_PRESERVEASPECTRATIO_XMAXYMIN:
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case SVG_PRESERVEASPECTRATIO_XMAXYMID:
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case SVG_PRESERVEASPECTRATIO_XMAXYMAX:
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e = aViewportWidth - a * aViewboxWidth;
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break;
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default:
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NS_NOTREACHED("Unknown value for align");
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}
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}
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else NS_NOTREACHED("Unknown value for meetOrSlice");
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}
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if (aViewboxX) e += -a * aViewboxX;
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if (aViewboxY) f += -d * aViewboxY;
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return gfx::Matrix(a, 0.0f, 0.0f, d, e, f);
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}
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static bool
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ParseNumber(RangedPtr<const char16_t>& aIter,
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const RangedPtr<const char16_t>& aEnd,
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double& aValue)
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{
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int32_t sign;
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if (!SVGContentUtils::ParseOptionalSign(aIter, aEnd, sign)) {
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return false;
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}
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// Absolute value of the integer part of the mantissa.
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double intPart = 0.0;
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bool gotDot = *aIter == '.';
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if (!gotDot) {
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if (!SVGContentUtils::IsDigit(*aIter)) {
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return false;
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}
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do {
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intPart = 10.0 * intPart + SVGContentUtils::DecimalDigitValue(*aIter);
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++aIter;
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} while (aIter != aEnd && SVGContentUtils::IsDigit(*aIter));
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if (aIter != aEnd) {
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gotDot = *aIter == '.';
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}
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}
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// Fractional part of the mantissa.
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double fracPart = 0.0;
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if (gotDot) {
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++aIter;
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if (aIter == aEnd || !SVGContentUtils::IsDigit(*aIter)) {
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return false;
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}
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// Power of ten by which we need to divide the fraction
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double divisor = 1.0;
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|
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do {
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fracPart = 10.0 * fracPart + SVGContentUtils::DecimalDigitValue(*aIter);
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divisor *= 10.0;
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++aIter;
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} while (aIter != aEnd && SVGContentUtils::IsDigit(*aIter));
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fracPart /= divisor;
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}
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|
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bool gotE = false;
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int32_t exponent = 0;
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int32_t expSign;
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|
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if (aIter != aEnd && (*aIter == 'e' || *aIter == 'E')) {
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|
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RangedPtr<const char16_t> expIter(aIter);
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|
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++expIter;
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if (expIter != aEnd) {
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expSign = *expIter == '-' ? -1 : 1;
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if (*expIter == '-' || *expIter == '+') {
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++expIter;
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}
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if (expIter != aEnd && SVGContentUtils::IsDigit(*expIter)) {
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// At this point we're sure this is an exponent
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// and not the start of a unit such as em or ex.
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|
gotE = true;
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}
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|
}
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|
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if (gotE) {
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aIter = expIter;
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do {
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exponent = 10.0 * exponent + SVGContentUtils::DecimalDigitValue(*aIter);
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++aIter;
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} while (aIter != aEnd && SVGContentUtils::IsDigit(*aIter));
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}
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|
}
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|
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// Assemble the number
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|
aValue = sign * (intPart + fracPart);
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|
if (gotE) {
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|
aValue *= pow(10.0, expSign * exponent);
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|
}
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return true;
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|
}
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|
template<class floatType>
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|
bool
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SVGContentUtils::ParseNumber(RangedPtr<const char16_t>& aIter,
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|
const RangedPtr<const char16_t>& aEnd,
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|
floatType& aValue)
|
|
{
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|
RangedPtr<const char16_t> iter(aIter);
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|
|
|
double value;
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|
if (!::ParseNumber(iter, aEnd, value)) {
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|
return false;
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|
}
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|
floatType floatValue = floatType(value);
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|
if (!IsFinite(floatValue)) {
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|
return false;
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|
}
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|
aValue = floatValue;
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|
aIter = iter;
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|
return true;
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|
}
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|
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|
template bool
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|
SVGContentUtils::ParseNumber<float>(RangedPtr<const char16_t>& aIter,
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|
const RangedPtr<const char16_t>& aEnd,
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|
float& aValue);
|
|
|
|
template bool
|
|
SVGContentUtils::ParseNumber<double>(RangedPtr<const char16_t>& aIter,
|
|
const RangedPtr<const char16_t>& aEnd,
|
|
double& aValue);
|
|
|
|
RangedPtr<const char16_t>
|
|
SVGContentUtils::GetStartRangedPtr(const nsAString& aString)
|
|
{
|
|
return RangedPtr<const char16_t>(aString.Data(), aString.Length());
|
|
}
|
|
|
|
RangedPtr<const char16_t>
|
|
SVGContentUtils::GetEndRangedPtr(const nsAString& aString)
|
|
{
|
|
return RangedPtr<const char16_t>(aString.Data() + aString.Length(),
|
|
aString.Data(), aString.Length());
|
|
}
|
|
|
|
template<class floatType>
|
|
bool
|
|
SVGContentUtils::ParseNumber(const nsAString& aString,
|
|
floatType& aValue)
|
|
{
|
|
RangedPtr<const char16_t> iter = GetStartRangedPtr(aString);
|
|
const RangedPtr<const char16_t> end = GetEndRangedPtr(aString);
|
|
|
|
return ParseNumber(iter, end, aValue) && iter == end;
|
|
}
|
|
|
|
template bool
|
|
SVGContentUtils::ParseNumber<float>(const nsAString& aString,
|
|
float& aValue);
|
|
template bool
|
|
SVGContentUtils::ParseNumber<double>(const nsAString& aString,
|
|
double& aValue);
|
|
|
|
/* static */
|
|
bool
|
|
SVGContentUtils::ParseInteger(RangedPtr<const char16_t>& aIter,
|
|
const RangedPtr<const char16_t>& aEnd,
|
|
int32_t& aValue)
|
|
{
|
|
RangedPtr<const char16_t> iter(aIter);
|
|
|
|
int32_t sign;
|
|
if (!ParseOptionalSign(iter, aEnd, sign)) {
|
|
return false;
|
|
}
|
|
|
|
if (!IsDigit(*iter)) {
|
|
return false;
|
|
}
|
|
|
|
int64_t value = 0;
|
|
|
|
do {
|
|
if (value <= std::numeric_limits<int32_t>::max()) {
|
|
value = 10 * value + DecimalDigitValue(*iter);
|
|
}
|
|
++iter;
|
|
} while (iter != aEnd && IsDigit(*iter));
|
|
|
|
aIter = iter;
|
|
aValue = int32_t(clamped(sign * value,
|
|
int64_t(std::numeric_limits<int32_t>::min()),
|
|
int64_t(std::numeric_limits<int32_t>::max())));
|
|
return true;
|
|
}
|
|
|
|
/* static */
|
|
bool
|
|
SVGContentUtils::ParseInteger(const nsAString& aString,
|
|
int32_t& aValue)
|
|
{
|
|
RangedPtr<const char16_t> iter = GetStartRangedPtr(aString);
|
|
const RangedPtr<const char16_t> end = GetEndRangedPtr(aString);
|
|
|
|
return ParseInteger(iter, end, aValue) && iter == end;
|
|
}
|
|
|
|
float
|
|
SVGContentUtils::CoordToFloat(nsSVGElement *aContent,
|
|
const nsStyleCoord &aCoord)
|
|
{
|
|
switch (aCoord.GetUnit()) {
|
|
case eStyleUnit_Factor:
|
|
// user units
|
|
return aCoord.GetFactorValue();
|
|
|
|
case eStyleUnit_Coord:
|
|
return nsPresContext::AppUnitsToFloatCSSPixels(aCoord.GetCoordValue());
|
|
|
|
case eStyleUnit_Percent: {
|
|
SVGSVGElement* ctx = aContent->GetCtx();
|
|
return ctx ? aCoord.GetPercentValue() * ctx->GetLength(SVGContentUtils::XY) : 0.0f;
|
|
}
|
|
default:
|
|
return 0.0f;
|
|
}
|
|
}
|
|
|
|
TemporaryRef<gfx::Path>
|
|
SVGContentUtils::GetPath(const nsAString& aPathString)
|
|
{
|
|
SVGPathData pathData;
|
|
nsSVGPathDataParser parser(aPathString, &pathData);
|
|
if (!parser.Parse()) {
|
|
return NULL;
|
|
}
|
|
|
|
RefPtr<DrawTarget> drawTarget =
|
|
gfxPlatform::GetPlatform()->ScreenReferenceDrawTarget();
|
|
RefPtr<PathBuilder> builder =
|
|
drawTarget->CreatePathBuilder(FillRule::FILL_WINDING);
|
|
|
|
return pathData.BuildPath(builder, NS_STYLE_STROKE_LINECAP_BUTT, 1);
|
|
}
|