ebca0ddac0
TBR= BUG=skia:7033 Change-Id: I07584acc35253acfd6ca2c3c91c615bb507f7601 Reviewed-on: https://skia-review.googlesource.com/44620 Reviewed-by: Florin Malita <fmalita@chromium.org> Commit-Queue: Florin Malita <fmalita@chromium.org>
471 lines
16 KiB
C++
471 lines
16 KiB
C++
/*
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* Copyright 2016 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "SkCanvas.h"
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#include "SkDOM.h"
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#include "SkParsePath.h"
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#include "SkString.h"
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#include "SkSVGAttributeParser.h"
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#include "SkSVGCircle.h"
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#include "SkSVGClipPath.h"
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#include "SkSVGDefs.h"
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#include "SkSVGDOM.h"
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#include "SkSVGEllipse.h"
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#include "SkSVGG.h"
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#include "SkSVGLine.h"
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#include "SkSVGLinearGradient.h"
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#include "SkSVGNode.h"
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#include "SkSVGPath.h"
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#include "SkSVGPoly.h"
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#include "SkSVGRect.h"
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#include "SkSVGRenderContext.h"
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#include "SkSVGStop.h"
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#include "SkSVGSVG.h"
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#include "SkSVGTypes.h"
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#include "SkSVGValue.h"
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#include "SkTSearch.h"
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namespace {
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bool SetPaintAttribute(const sk_sp<SkSVGNode>& node, SkSVGAttribute attr,
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const char* stringValue) {
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SkSVGPaint paint;
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SkSVGAttributeParser parser(stringValue);
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if (!parser.parsePaint(&paint)) {
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return false;
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}
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node->setAttribute(attr, SkSVGPaintValue(paint));
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return true;
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}
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bool SetColorAttribute(const sk_sp<SkSVGNode>& node, SkSVGAttribute attr,
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const char* stringValue) {
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SkSVGColorType color;
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SkSVGAttributeParser parser(stringValue);
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if (!parser.parseColor(&color)) {
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return false;
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}
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node->setAttribute(attr, SkSVGColorValue(color));
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return true;
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}
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bool SetIRIAttribute(const sk_sp<SkSVGNode>& node, SkSVGAttribute attr,
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const char* stringValue) {
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SkSVGStringType iri;
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SkSVGAttributeParser parser(stringValue);
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if (!parser.parseIRI(&iri)) {
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return false;
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}
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node->setAttribute(attr, SkSVGStringValue(iri));
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return true;
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}
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bool SetClipPathAttribute(const sk_sp<SkSVGNode>& node, SkSVGAttribute attr,
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const char* stringValue) {
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SkSVGClip clip;
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SkSVGAttributeParser parser(stringValue);
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if (!parser.parseClipPath(&clip)) {
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return false;
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}
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node->setAttribute(attr, SkSVGClipValue(clip));
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return true;
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}
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bool SetPathDataAttribute(const sk_sp<SkSVGNode>& node, SkSVGAttribute attr,
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const char* stringValue) {
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SkPath path;
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if (!SkParsePath::FromSVGString(stringValue, &path)) {
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return false;
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}
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node->setAttribute(attr, SkSVGPathValue(path));
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return true;
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}
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bool SetTransformAttribute(const sk_sp<SkSVGNode>& node, SkSVGAttribute attr,
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const char* stringValue) {
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SkSVGTransformType transform;
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SkSVGAttributeParser parser(stringValue);
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if (!parser.parseTransform(&transform)) {
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return false;
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}
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node->setAttribute(attr, SkSVGTransformValue(transform));
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return true;
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}
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bool SetLengthAttribute(const sk_sp<SkSVGNode>& node, SkSVGAttribute attr,
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const char* stringValue) {
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SkSVGLength length;
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SkSVGAttributeParser parser(stringValue);
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if (!parser.parseLength(&length)) {
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return false;
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}
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node->setAttribute(attr, SkSVGLengthValue(length));
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return true;
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}
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bool SetNumberAttribute(const sk_sp<SkSVGNode>& node, SkSVGAttribute attr,
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const char* stringValue) {
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SkSVGNumberType number;
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SkSVGAttributeParser parser(stringValue);
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if (!parser.parseNumber(&number)) {
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return false;
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}
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node->setAttribute(attr, SkSVGNumberValue(number));
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return true;
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}
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bool SetViewBoxAttribute(const sk_sp<SkSVGNode>& node, SkSVGAttribute attr,
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const char* stringValue) {
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SkSVGViewBoxType viewBox;
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SkSVGAttributeParser parser(stringValue);
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if (!parser.parseViewBox(&viewBox)) {
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return false;
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}
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node->setAttribute(attr, SkSVGViewBoxValue(viewBox));
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return true;
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}
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bool SetLineCapAttribute(const sk_sp<SkSVGNode>& node, SkSVGAttribute attr,
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const char* stringValue) {
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SkSVGLineCap lineCap;
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SkSVGAttributeParser parser(stringValue);
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if (!parser.parseLineCap(&lineCap)) {
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return false;
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}
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node->setAttribute(attr, SkSVGLineCapValue(lineCap));
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return true;
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}
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bool SetLineJoinAttribute(const sk_sp<SkSVGNode>& node, SkSVGAttribute attr,
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const char* stringValue) {
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SkSVGLineJoin lineJoin;
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SkSVGAttributeParser parser(stringValue);
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if (!parser.parseLineJoin(&lineJoin)) {
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return false;
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}
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node->setAttribute(attr, SkSVGLineJoinValue(lineJoin));
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return true;
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}
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bool SetSpreadMethodAttribute(const sk_sp<SkSVGNode>& node, SkSVGAttribute attr,
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const char* stringValue) {
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SkSVGSpreadMethod spread;
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SkSVGAttributeParser parser(stringValue);
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if (!parser.parseSpreadMethod(&spread)) {
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return false;
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}
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node->setAttribute(attr, SkSVGSpreadMethodValue(spread));
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return true;
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}
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bool SetPointsAttribute(const sk_sp<SkSVGNode>& node, SkSVGAttribute attr,
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const char* stringValue) {
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SkSVGPointsType points;
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SkSVGAttributeParser parser(stringValue);
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if (!parser.parsePoints(&points)) {
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return false;
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}
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node->setAttribute(attr, SkSVGPointsValue(points));
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return true;
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}
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bool SetFillRuleAttribute(const sk_sp<SkSVGNode>& node, SkSVGAttribute attr,
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const char* stringValue) {
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SkSVGFillRule fillRule;
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SkSVGAttributeParser parser(stringValue);
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if (!parser.parseFillRule(&fillRule)) {
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return false;
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}
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node->setAttribute(attr, SkSVGFillRuleValue(fillRule));
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return true;
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}
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SkString TrimmedString(const char* first, const char* last) {
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SkASSERT(first);
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SkASSERT(last);
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SkASSERT(first <= last);
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while (first <= last && *first <= ' ') { first++; }
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while (first <= last && *last <= ' ') { last--; }
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SkASSERT(last - first + 1 >= 0);
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return SkString(first, SkTo<size_t>(last - first + 1));
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}
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// Breaks a "foo: bar; baz: ..." string into key:value pairs.
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class StyleIterator {
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public:
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StyleIterator(const char* str) : fPos(str) { }
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std::tuple<SkString, SkString> next() {
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SkString name, value;
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if (fPos) {
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const char* sep = this->nextSeparator();
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SkASSERT(*sep == ';' || *sep == '\0');
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const char* valueSep = strchr(fPos, ':');
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if (valueSep && valueSep < sep) {
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name = TrimmedString(fPos, valueSep - 1);
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value = TrimmedString(valueSep + 1, sep - 1);
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}
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fPos = *sep ? sep + 1 : nullptr;
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}
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return std::make_tuple(name, value);
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}
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private:
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const char* nextSeparator() const {
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const char* sep = fPos;
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while (*sep != ';' && *sep != '\0') {
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sep++;
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}
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return sep;
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}
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const char* fPos;
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};
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void set_string_attribute(const sk_sp<SkSVGNode>& node, const char* name, const char* value);
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bool SetStyleAttributes(const sk_sp<SkSVGNode>& node, SkSVGAttribute,
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const char* stringValue) {
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SkString name, value;
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StyleIterator iter(stringValue);
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for (;;) {
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std::tie(name, value) = iter.next();
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if (name.isEmpty()) {
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break;
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}
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set_string_attribute(node, name.c_str(), value.c_str());
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}
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return true;
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}
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template<typename T>
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struct SortedDictionaryEntry {
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const char* fKey;
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const T fValue;
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};
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struct AttrParseInfo {
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SkSVGAttribute fAttr;
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bool (*fSetter)(const sk_sp<SkSVGNode>& node, SkSVGAttribute attr, const char* stringValue);
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};
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SortedDictionaryEntry<AttrParseInfo> gAttributeParseInfo[] = {
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{ "clip-path" , { SkSVGAttribute::kClipPath , SetClipPathAttribute }},
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{ "cx" , { SkSVGAttribute::kCx , SetLengthAttribute }},
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{ "cy" , { SkSVGAttribute::kCy , SetLengthAttribute }},
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{ "d" , { SkSVGAttribute::kD , SetPathDataAttribute }},
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{ "fill" , { SkSVGAttribute::kFill , SetPaintAttribute }},
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{ "fill-opacity" , { SkSVGAttribute::kFillOpacity , SetNumberAttribute }},
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{ "fill-rule" , { SkSVGAttribute::kFillRule , SetFillRuleAttribute }},
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{ "gradientTransform", { SkSVGAttribute::kGradientTransform, SetTransformAttribute }},
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{ "height" , { SkSVGAttribute::kHeight , SetLengthAttribute }},
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{ "offset" , { SkSVGAttribute::kOffset , SetLengthAttribute }},
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{ "opacity" , { SkSVGAttribute::kOpacity , SetNumberAttribute }},
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{ "points" , { SkSVGAttribute::kPoints , SetPointsAttribute }},
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{ "r" , { SkSVGAttribute::kR , SetLengthAttribute }},
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{ "rx" , { SkSVGAttribute::kRx , SetLengthAttribute }},
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{ "ry" , { SkSVGAttribute::kRy , SetLengthAttribute }},
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{ "spreadMethod" , { SkSVGAttribute::kSpreadMethod , SetSpreadMethodAttribute }},
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{ "stop-color" , { SkSVGAttribute::kStopColor , SetColorAttribute }},
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{ "stop-opacity" , { SkSVGAttribute::kStopOpacity , SetNumberAttribute }},
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{ "stroke" , { SkSVGAttribute::kStroke , SetPaintAttribute }},
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{ "stroke-linecap" , { SkSVGAttribute::kStrokeLineCap , SetLineCapAttribute }},
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{ "stroke-linejoin" , { SkSVGAttribute::kStrokeLineJoin , SetLineJoinAttribute }},
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{ "stroke-opacity" , { SkSVGAttribute::kStrokeOpacity , SetNumberAttribute }},
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{ "stroke-width" , { SkSVGAttribute::kStrokeWidth , SetLengthAttribute }},
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{ "style" , { SkSVGAttribute::kUnknown , SetStyleAttributes }},
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{ "transform" , { SkSVGAttribute::kTransform , SetTransformAttribute }},
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{ "viewBox" , { SkSVGAttribute::kViewBox , SetViewBoxAttribute }},
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{ "width" , { SkSVGAttribute::kWidth , SetLengthAttribute }},
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{ "x" , { SkSVGAttribute::kX , SetLengthAttribute }},
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{ "x1" , { SkSVGAttribute::kX1 , SetLengthAttribute }},
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{ "x2" , { SkSVGAttribute::kX2 , SetLengthAttribute }},
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{ "xlink:href" , { SkSVGAttribute::kHref , SetIRIAttribute }},
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{ "y" , { SkSVGAttribute::kY , SetLengthAttribute }},
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{ "y1" , { SkSVGAttribute::kY1 , SetLengthAttribute }},
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{ "y2" , { SkSVGAttribute::kY2 , SetLengthAttribute }},
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};
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SortedDictionaryEntry<sk_sp<SkSVGNode>(*)()> gTagFactories[] = {
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{ "circle" , []() -> sk_sp<SkSVGNode> { return SkSVGCircle::Make(); }},
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{ "clipPath" , []() -> sk_sp<SkSVGNode> { return SkSVGClipPath::Make(); }},
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{ "defs" , []() -> sk_sp<SkSVGNode> { return SkSVGDefs::Make(); }},
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{ "ellipse" , []() -> sk_sp<SkSVGNode> { return SkSVGEllipse::Make(); }},
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{ "g" , []() -> sk_sp<SkSVGNode> { return SkSVGG::Make(); }},
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{ "line" , []() -> sk_sp<SkSVGNode> { return SkSVGLine::Make(); }},
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{ "linearGradient", []() -> sk_sp<SkSVGNode> { return SkSVGLinearGradient::Make(); }},
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{ "path" , []() -> sk_sp<SkSVGNode> { return SkSVGPath::Make(); }},
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{ "polygon" , []() -> sk_sp<SkSVGNode> { return SkSVGPoly::MakePolygon(); }},
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{ "polyline" , []() -> sk_sp<SkSVGNode> { return SkSVGPoly::MakePolyline(); }},
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{ "rect" , []() -> sk_sp<SkSVGNode> { return SkSVGRect::Make(); }},
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{ "stop" , []() -> sk_sp<SkSVGNode> { return SkSVGStop::Make(); }},
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{ "svg" , []() -> sk_sp<SkSVGNode> { return SkSVGSVG::Make(); }},
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};
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struct ConstructionContext {
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ConstructionContext(SkSVGIDMapper* mapper) : fParent(nullptr), fIDMapper(mapper) {}
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ConstructionContext(const ConstructionContext& other, const sk_sp<SkSVGNode>& newParent)
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: fParent(newParent.get()), fIDMapper(other.fIDMapper) {}
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const SkSVGNode* fParent;
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SkSVGIDMapper* fIDMapper;
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};
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void set_string_attribute(const sk_sp<SkSVGNode>& node, const char* name, const char* value) {
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const int attrIndex = SkStrSearch(&gAttributeParseInfo[0].fKey,
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SkTo<int>(SK_ARRAY_COUNT(gAttributeParseInfo)),
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name, sizeof(gAttributeParseInfo[0]));
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if (attrIndex < 0) {
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#if defined(SK_VERBOSE_SVG_PARSING)
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SkDebugf("unhandled attribute: %s\n", name);
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#endif
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return;
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}
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SkASSERT(SkTo<size_t>(attrIndex) < SK_ARRAY_COUNT(gAttributeParseInfo));
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const auto& attrInfo = gAttributeParseInfo[attrIndex].fValue;
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if (!attrInfo.fSetter(node, attrInfo.fAttr, value)) {
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#if defined(SK_VERBOSE_SVG_PARSING)
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SkDebugf("could not parse attribute: '%s=\"%s\"'\n", name, value);
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#endif
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}
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}
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void parse_node_attributes(const SkDOM& xmlDom, const SkDOM::Node* xmlNode,
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const sk_sp<SkSVGNode>& svgNode, SkSVGIDMapper* mapper) {
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const char* name, *value;
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SkDOM::AttrIter attrIter(xmlDom, xmlNode);
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while ((name = attrIter.next(&value))) {
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// We're handling id attributes out of band for now.
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if (!strcmp(name, "id")) {
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mapper->set(SkString(value), svgNode);
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continue;
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}
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set_string_attribute(svgNode, name, value);
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}
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}
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sk_sp<SkSVGNode> construct_svg_node(const SkDOM& dom, const ConstructionContext& ctx,
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const SkDOM::Node* xmlNode) {
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const char* elem = dom.getName(xmlNode);
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const SkDOM::Type elemType = dom.getType(xmlNode);
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if (elemType == SkDOM::kText_Type) {
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SkASSERT(dom.countChildren(xmlNode) == 0);
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// TODO: text handling
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return nullptr;
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}
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SkASSERT(elemType == SkDOM::kElement_Type);
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const int tagIndex = SkStrSearch(&gTagFactories[0].fKey,
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SkTo<int>(SK_ARRAY_COUNT(gTagFactories)),
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elem, sizeof(gTagFactories[0]));
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if (tagIndex < 0) {
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#if defined(SK_VERBOSE_SVG_PARSING)
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SkDebugf("unhandled element: <%s>\n", elem);
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#endif
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return nullptr;
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}
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SkASSERT(SkTo<size_t>(tagIndex) < SK_ARRAY_COUNT(gTagFactories));
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sk_sp<SkSVGNode> node = gTagFactories[tagIndex].fValue();
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parse_node_attributes(dom, xmlNode, node, ctx.fIDMapper);
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ConstructionContext localCtx(ctx, node);
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for (auto* child = dom.getFirstChild(xmlNode, nullptr); child;
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child = dom.getNextSibling(child)) {
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sk_sp<SkSVGNode> childNode = construct_svg_node(dom, localCtx, child);
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if (childNode) {
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node->appendChild(std::move(childNode));
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}
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}
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return node;
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}
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} // anonymous namespace
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SkSVGDOM::SkSVGDOM()
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: fContainerSize(SkSize::Make(0, 0)) {
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}
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sk_sp<SkSVGDOM> SkSVGDOM::MakeFromDOM(const SkDOM& xmlDom) {
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sk_sp<SkSVGDOM> dom = sk_make_sp<SkSVGDOM>();
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ConstructionContext ctx(&dom->fIDMapper);
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dom->fRoot = construct_svg_node(xmlDom, ctx, xmlDom.getRootNode());
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// Reset the default container size to match the intrinsic SVG size.
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dom->setContainerSize(dom->intrinsicSize());
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return dom;
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}
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sk_sp<SkSVGDOM> SkSVGDOM::MakeFromStream(SkStream& svgStream) {
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SkDOM xmlDom;
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if (!xmlDom.build(svgStream)) {
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return nullptr;
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}
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return MakeFromDOM(xmlDom);
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}
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void SkSVGDOM::render(SkCanvas* canvas) const {
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if (fRoot) {
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SkSVGLengthContext lctx(fContainerSize);
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SkSVGPresentationContext pctx;
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fRoot->render(SkSVGRenderContext(canvas, fIDMapper, lctx, pctx));
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}
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}
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SkSize SkSVGDOM::intrinsicSize() const {
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if (!fRoot || fRoot->tag() != SkSVGTag::kSvg) {
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return SkSize::Make(0, 0);
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}
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// Intrinsic sizes are never relative, so the viewport size is irrelevant.
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const SkSVGLengthContext lctx(SkSize::Make(0, 0));
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return static_cast<const SkSVGSVG*>(fRoot.get())->intrinsicSize(lctx);
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}
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const SkSize& SkSVGDOM::containerSize() const {
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return fContainerSize;
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}
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void SkSVGDOM::setContainerSize(const SkSize& containerSize) {
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// TODO: inval
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fContainerSize = containerSize;
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}
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void SkSVGDOM::setRoot(sk_sp<SkSVGNode> root) {
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fRoot = std::move(root);
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}
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