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/*
* Copyright 2016 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "include/core/SkCanvas.h"
#include "include/core/SkFontMgr.h"
#include "include/core/SkString.h"
#include "include/private/SkTo.h"
#include "modules/svg/include/SkSVGAttributeParser.h"
#include "modules/svg/include/SkSVGCircle.h"
#include "modules/svg/include/SkSVGClipPath.h"
#include "modules/svg/include/SkSVGDOM.h"
#include "modules/svg/include/SkSVGDefs.h"
#include "modules/svg/include/SkSVGEllipse.h"
#include "modules/svg/include/SkSVGFeBlend.h"
#include "modules/svg/include/SkSVGFeColorMatrix.h"
#include "modules/svg/include/SkSVGFeComposite.h"
#include "modules/svg/include/SkSVGFeDisplacementMap.h"
#include "modules/svg/include/SkSVGFeFlood.h"
#include "modules/svg/include/SkSVGFeGaussianBlur.h"
#include "modules/svg/include/SkSVGFeImage.h"
#include "modules/svg/include/SkSVGFeLightSource.h"
#include "modules/svg/include/SkSVGFeLighting.h"
#include "modules/svg/include/SkSVGFeMorphology.h"
#include "modules/svg/include/SkSVGFeOffset.h"
#include "modules/svg/include/SkSVGFeTurbulence.h"
#include "modules/svg/include/SkSVGFilter.h"
#include "modules/svg/include/SkSVGG.h"
#include "modules/svg/include/SkSVGImage.h"
#include "modules/svg/include/SkSVGLine.h"
#include "modules/svg/include/SkSVGLinearGradient.h"
#include "modules/svg/include/SkSVGMask.h"
#include "modules/svg/include/SkSVGNode.h"
#include "modules/svg/include/SkSVGPath.h"
#include "modules/svg/include/SkSVGPattern.h"
#include "modules/svg/include/SkSVGPoly.h"
#include "modules/svg/include/SkSVGRadialGradient.h"
#include "modules/svg/include/SkSVGRect.h"
#include "modules/svg/include/SkSVGRenderContext.h"
#include "modules/svg/include/SkSVGSVG.h"
#include "modules/svg/include/SkSVGStop.h"
#include "modules/svg/include/SkSVGText.h"
#include "modules/svg/include/SkSVGTypes.h"
#include "modules/svg/include/SkSVGUse.h"
#include "modules/svg/include/SkSVGValue.h"
#include "src/core/SkTSearch.h"
#include "src/core/SkTraceEvent.h"
#include "src/xml/SkDOM.h"
namespace {
bool SetIRIAttribute(const sk_sp<SkSVGNode>& node, SkSVGAttribute attr,
const char* stringValue) {
auto parseResult = SkSVGAttributeParser::parse<SkSVGIRI>(stringValue);
if (!parseResult.isValid()) {
return false;
}
node->setAttribute(attr, SkSVGStringValue(parseResult->iri()));
return true;
}
bool SetStringAttribute(const sk_sp<SkSVGNode>& node, SkSVGAttribute attr,
const char* stringValue) {
SkString str(stringValue, strlen(stringValue));
SkSVGStringType strType = SkSVGStringType(str);
node->setAttribute(attr, SkSVGStringValue(strType));
return true;
}
bool SetTransformAttribute(const sk_sp<SkSVGNode>& node, SkSVGAttribute attr,
const char* stringValue) {
auto parseResult = SkSVGAttributeParser::parse<SkSVGTransformType>(stringValue);
if (!parseResult.isValid()) {
return false;
}
node->setAttribute(attr, SkSVGTransformValue(*parseResult));
return true;
}
bool SetLengthAttribute(const sk_sp<SkSVGNode>& node, SkSVGAttribute attr,
const char* stringValue) {
auto parseResult = SkSVGAttributeParser::parse<SkSVGLength>(stringValue);
if (!parseResult.isValid()) {
return false;
}
node->setAttribute(attr, SkSVGLengthValue(*parseResult));
return true;
}
bool SetViewBoxAttribute(const sk_sp<SkSVGNode>& node, SkSVGAttribute attr,
const char* stringValue) {
SkSVGViewBoxType viewBox;
SkSVGAttributeParser parser(stringValue);
if (!parser.parseViewBox(&viewBox)) {
return false;
}
node->setAttribute(attr, SkSVGViewBoxValue(viewBox));
return true;
}
bool SetObjectBoundingBoxUnitsAttribute(const sk_sp<SkSVGNode>& node,
SkSVGAttribute attr,
const char* stringValue) {
auto parseResult = SkSVGAttributeParser::parse<SkSVGObjectBoundingBoxUnits>(stringValue);
if (!parseResult.isValid()) {
return false;
}
node->setAttribute(attr, SkSVGObjectBoundingBoxUnitsValue(*parseResult));
return true;
}
bool SetPreserveAspectRatioAttribute(const sk_sp<SkSVGNode>& node, SkSVGAttribute attr,
const char* stringValue) {
SkSVGPreserveAspectRatio par;
SkSVGAttributeParser parser(stringValue);
if (!parser.parsePreserveAspectRatio(&par)) {
return false;
}
node->setAttribute(attr, SkSVGPreserveAspectRatioValue(par));
return true;
}
SkString TrimmedString(const char* first, const char* last) {
SkASSERT(first);
SkASSERT(last);
SkASSERT(first <= last);
while (first <= last && *first <= ' ') { first++; }
while (first <= last && *last <= ' ') { last--; }
SkASSERT(last - first + 1 >= 0);
return SkString(first, SkTo<size_t>(last - first + 1));
}
// Breaks a "foo: bar; baz: ..." string into key:value pairs.
class StyleIterator {
public:
StyleIterator(const char* str) : fPos(str) { }
std::tuple<SkString, SkString> next() {
SkString name, value;
if (fPos) {
const char* sep = this->nextSeparator();
SkASSERT(*sep == ';' || *sep == '\0');
const char* valueSep = strchr(fPos, ':');
if (valueSep && valueSep < sep) {
name = TrimmedString(fPos, valueSep - 1);
value = TrimmedString(valueSep + 1, sep - 1);
}
fPos = *sep ? sep + 1 : nullptr;
}
return std::make_tuple(name, value);
}
private:
const char* nextSeparator() const {
const char* sep = fPos;
while (*sep != ';' && *sep != '\0') {
sep++;
}
return sep;
}
const char* fPos;
};
bool set_string_attribute(const sk_sp<SkSVGNode>& node, const char* name, const char* value);
bool SetStyleAttributes(const sk_sp<SkSVGNode>& node, SkSVGAttribute,
const char* stringValue) {
SkString name, value;
StyleIterator iter(stringValue);
for (;;) {
std::tie(name, value) = iter.next();
if (name.isEmpty()) {
break;
}
set_string_attribute(node, name.c_str(), value.c_str());
}
return true;
}
template<typename T>
struct SortedDictionaryEntry {
const char* fKey;
const T fValue;
};
struct AttrParseInfo {
SkSVGAttribute fAttr;
bool (*fSetter)(const sk_sp<SkSVGNode>& node, SkSVGAttribute attr, const char* stringValue);
};
SortedDictionaryEntry<AttrParseInfo> gAttributeParseInfo[] = {
{ "cx" , { SkSVGAttribute::kCx , SetLengthAttribute }},
{ "cy" , { SkSVGAttribute::kCy , SetLengthAttribute }},
{ "filterUnits" , { SkSVGAttribute::kFilterUnits ,
SetObjectBoundingBoxUnitsAttribute }},
// focal point x & y
{ "fx" , { SkSVGAttribute::kFx , SetLengthAttribute }},
{ "fy" , { SkSVGAttribute::kFy , SetLengthAttribute }},
{ "height" , { SkSVGAttribute::kHeight , SetLengthAttribute }},
{ "preserveAspectRatio", { SkSVGAttribute::kPreserveAspectRatio,
SetPreserveAspectRatioAttribute }},
{ "r" , { SkSVGAttribute::kR , SetLengthAttribute }},
{ "rx" , { SkSVGAttribute::kRx , SetLengthAttribute }},
{ "ry" , { SkSVGAttribute::kRy , SetLengthAttribute }},
{ "style" , { SkSVGAttribute::kUnknown , SetStyleAttributes }},
{ "text" , { SkSVGAttribute::kText , SetStringAttribute }},
{ "transform" , { SkSVGAttribute::kTransform , SetTransformAttribute }},
{ "viewBox" , { SkSVGAttribute::kViewBox , SetViewBoxAttribute }},
{ "width" , { SkSVGAttribute::kWidth , SetLengthAttribute }},
{ "x" , { SkSVGAttribute::kX , SetLengthAttribute }},
{ "x1" , { SkSVGAttribute::kX1 , SetLengthAttribute }},
{ "x2" , { SkSVGAttribute::kX2 , SetLengthAttribute }},
{ "xlink:href" , { SkSVGAttribute::kHref , SetIRIAttribute }},
{ "y" , { SkSVGAttribute::kY , SetLengthAttribute }},
{ "y1" , { SkSVGAttribute::kY1 , SetLengthAttribute }},
{ "y2" , { SkSVGAttribute::kY2 , SetLengthAttribute }},
};
SortedDictionaryEntry<sk_sp<SkSVGNode>(*)()> gTagFactories[] = {
{ "a" , []() -> sk_sp<SkSVGNode> { return SkSVGG::Make(); }},
{ "circle" , []() -> sk_sp<SkSVGNode> { return SkSVGCircle::Make(); }},
{ "clipPath" , []() -> sk_sp<SkSVGNode> { return SkSVGClipPath::Make(); }},
{ "defs" , []() -> sk_sp<SkSVGNode> { return SkSVGDefs::Make(); }},
{ "ellipse" , []() -> sk_sp<SkSVGNode> { return SkSVGEllipse::Make(); }},
{ "feBlend" , []() -> sk_sp<SkSVGNode> { return SkSVGFeBlend::Make(); }},
{ "feColorMatrix" , []() -> sk_sp<SkSVGNode> { return SkSVGFeColorMatrix::Make(); }},
{ "feComposite" , []() -> sk_sp<SkSVGNode> { return SkSVGFeComposite::Make(); }},
{ "feDiffuseLighting" , []() -> sk_sp<SkSVGNode> { return SkSVGFeDiffuseLighting::Make(); }},
{ "feDisplacementMap" , []() -> sk_sp<SkSVGNode> { return SkSVGFeDisplacementMap::Make(); }},
{ "feDistantLight" , []() -> sk_sp<SkSVGNode> { return SkSVGFeDistantLight::Make(); }},
{ "feFlood" , []() -> sk_sp<SkSVGNode> { return SkSVGFeFlood::Make(); }},
{ "feGaussianBlur" , []() -> sk_sp<SkSVGNode> { return SkSVGFeGaussianBlur::Make(); }},
{ "feImage" , []() -> sk_sp<SkSVGNode> { return SkSVGFeImage::Make(); }},
{ "feMorphology" , []() -> sk_sp<SkSVGNode> { return SkSVGFeMorphology::Make(); }},
{ "feOffset" , []() -> sk_sp<SkSVGNode> { return SkSVGFeOffset::Make(); }},
{ "fePointLight" , []() -> sk_sp<SkSVGNode> { return SkSVGFePointLight::Make(); }},
{ "feSpecularLighting", []() -> sk_sp<SkSVGNode> { return SkSVGFeSpecularLighting::Make(); }},
{ "feSpotLight" , []() -> sk_sp<SkSVGNode> { return SkSVGFeSpotLight::Make(); }},
{ "feTurbulence" , []() -> sk_sp<SkSVGNode> { return SkSVGFeTurbulence::Make(); }},
{ "filter" , []() -> sk_sp<SkSVGNode> { return SkSVGFilter::Make(); }},
{ "g" , []() -> sk_sp<SkSVGNode> { return SkSVGG::Make(); }},
{ "image" , []() -> sk_sp<SkSVGNode> { return SkSVGImage::Make(); }},
{ "line" , []() -> sk_sp<SkSVGNode> { return SkSVGLine::Make(); }},
{ "linearGradient" , []() -> sk_sp<SkSVGNode> { return SkSVGLinearGradient::Make(); }},
{ "mask" , []() -> sk_sp<SkSVGNode> { return SkSVGMask::Make(); }},
{ "path" , []() -> sk_sp<SkSVGNode> { return SkSVGPath::Make(); }},
{ "pattern" , []() -> sk_sp<SkSVGNode> { return SkSVGPattern::Make(); }},
{ "polygon" , []() -> sk_sp<SkSVGNode> { return SkSVGPoly::MakePolygon(); }},
{ "polyline" , []() -> sk_sp<SkSVGNode> { return SkSVGPoly::MakePolyline(); }},
{ "radialGradient" , []() -> sk_sp<SkSVGNode> { return SkSVGRadialGradient::Make(); }},
{ "rect" , []() -> sk_sp<SkSVGNode> { return SkSVGRect::Make(); }},
{ "stop" , []() -> sk_sp<SkSVGNode> { return SkSVGStop::Make(); }},
// "svg" handled explicitly
{ "text" , []() -> sk_sp<SkSVGNode> { return SkSVGText::Make(); }},
{ "textPath" , []() -> sk_sp<SkSVGNode> { return SkSVGTextPath::Make(); }},
{ "tspan" , []() -> sk_sp<SkSVGNode> { return SkSVGTSpan::Make(); }},
{ "use" , []() -> sk_sp<SkSVGNode> { return SkSVGUse::Make(); }},
};
struct ConstructionContext {
ConstructionContext(SkSVGIDMapper* mapper) : fParent(nullptr), fIDMapper(mapper) {}
ConstructionContext(const ConstructionContext& other, const sk_sp<SkSVGNode>& newParent)
: fParent(newParent.get()), fIDMapper(other.fIDMapper) {}
SkSVGNode* fParent;
SkSVGIDMapper* fIDMapper;
};
bool set_string_attribute(const sk_sp<SkSVGNode>& node, const char* name, const char* value) {
if (node->parseAndSetAttribute(name, value)) {
// Handled by new code path
return true;
}
const int attrIndex = SkStrSearch(&gAttributeParseInfo[0].fKey,
SkTo<int>(SK_ARRAY_COUNT(gAttributeParseInfo)),
name, sizeof(gAttributeParseInfo[0]));
if (attrIndex < 0) {
#if defined(SK_VERBOSE_SVG_PARSING)
SkDebugf("unhandled attribute: %s\n", name);
#endif
return false;
}
SkASSERT(SkTo<size_t>(attrIndex) < SK_ARRAY_COUNT(gAttributeParseInfo));
const auto& attrInfo = gAttributeParseInfo[attrIndex].fValue;
if (!attrInfo.fSetter(node, attrInfo.fAttr, value)) {
#if defined(SK_VERBOSE_SVG_PARSING)
SkDebugf("could not parse attribute: '%s=\"%s\"'\n", name, value);
#endif
return false;
}
return true;
}
void parse_node_attributes(const SkDOM& xmlDom, const SkDOM::Node* xmlNode,
const sk_sp<SkSVGNode>& svgNode, SkSVGIDMapper* mapper) {
const char* name, *value;
SkDOM::AttrIter attrIter(xmlDom, xmlNode);
while ((name = attrIter.next(&value))) {
// We're handling id attributes out of band for now.
if (!strcmp(name, "id")) {
mapper->set(SkString(value), svgNode);
continue;
}
set_string_attribute(svgNode, name, value);
}
}
sk_sp<SkSVGNode> construct_svg_node(const SkDOM& dom, const ConstructionContext& ctx,
const SkDOM::Node* xmlNode) {
const char* elem = dom.getName(xmlNode);
const SkDOM::Type elemType = dom.getType(xmlNode);
if (elemType == SkDOM::kText_Type) {
// Text literals require special handling.
SkASSERT(dom.countChildren(xmlNode) == 0);
auto txt = SkSVGTextLiteral::Make();
txt->setText(SkString(dom.getName(xmlNode)));
ctx.fParent->appendChild(std::move(txt));
return nullptr;
}
SkASSERT(elemType == SkDOM::kElement_Type);
auto make_node = [](const ConstructionContext& ctx, const char* elem) -> sk_sp<SkSVGNode> {
if (strcmp(elem, "svg") == 0) {
// Outermost SVG element must be tagged as such.
return SkSVGSVG::Make(ctx.fParent ? SkSVGSVG::Type::kInner
: SkSVGSVG::Type::kRoot);
}
const int tagIndex = SkStrSearch(&gTagFactories[0].fKey,
SkTo<int>(SK_ARRAY_COUNT(gTagFactories)),
elem, sizeof(gTagFactories[0]));
if (tagIndex < 0) {
#if defined(SK_VERBOSE_SVG_PARSING)
SkDebugf("unhandled element: <%s>\n", elem);
#endif
return nullptr;
}
SkASSERT(SkTo<size_t>(tagIndex) < SK_ARRAY_COUNT(gTagFactories));
return gTagFactories[tagIndex].fValue();
};
auto node = make_node(ctx, elem);
if (!node) {
return nullptr;
}
parse_node_attributes(dom, xmlNode, node, ctx.fIDMapper);
ConstructionContext localCtx(ctx, node);
for (auto* child = dom.getFirstChild(xmlNode, nullptr); child;
child = dom.getNextSibling(child)) {
sk_sp<SkSVGNode> childNode = construct_svg_node(dom, localCtx, child);
if (childNode) {
node->appendChild(std::move(childNode));
}
}
return node;
}
} // anonymous namespace
SkSVGDOM::Builder& SkSVGDOM::Builder::setFontManager(sk_sp<SkFontMgr> fmgr) {
fFontMgr = std::move(fmgr);
return *this;
}
SkSVGDOM::Builder& SkSVGDOM::Builder::setResourceProvider(sk_sp<skresources::ResourceProvider> rp) {
fResourceProvider = std::move(rp);
return *this;
}
sk_sp<SkSVGDOM> SkSVGDOM::Builder::make(SkStream& str) const {
TRACE_EVENT0("skia", TRACE_FUNC);
SkDOM xmlDom;
if (!xmlDom.build(str)) {
return nullptr;
}
SkSVGIDMapper mapper;
ConstructionContext ctx(&mapper);
auto root = construct_svg_node(xmlDom, ctx, xmlDom.getRootNode());
if (!root || root->tag() != SkSVGTag::kSvg) {
return nullptr;
}
class NullResourceProvider final : public skresources::ResourceProvider {
sk_sp<SkData> load(const char[], const char[]) const override { return nullptr; }
};
auto resource_provider = fResourceProvider ? fResourceProvider
: sk_make_sp<NullResourceProvider>();
return sk_sp<SkSVGDOM>(new SkSVGDOM(sk_sp<SkSVGSVG>(static_cast<SkSVGSVG*>(root.release())),
std::move(fFontMgr), std::move(resource_provider),
std::move(mapper)));
}
SkSVGDOM::SkSVGDOM(sk_sp<SkSVGSVG> root, sk_sp<SkFontMgr> fmgr,
sk_sp<skresources::ResourceProvider> rp, SkSVGIDMapper&& mapper)
: fRoot(std::move(root))
, fFontMgr(std::move(fmgr))
, fResourceProvider(std::move(rp))
, fIDMapper(std::move(mapper))
, fContainerSize(fRoot->intrinsicSize(SkSVGLengthContext(SkSize::Make(0, 0))))
{
SkASSERT(fResourceProvider);
}
void SkSVGDOM::render(SkCanvas* canvas) const {
TRACE_EVENT0("skia", TRACE_FUNC);
if (fRoot) {
SkSVGLengthContext lctx(fContainerSize);
SkSVGPresentationContext pctx;
fRoot->render(SkSVGRenderContext(canvas, fFontMgr, fResourceProvider, fIDMapper, lctx, pctx,
{nullptr, nullptr}));
}
}
void SkSVGDOM::renderNode(SkCanvas* canvas, SkSVGPresentationContext& pctx, const char* id) const {
TRACE_EVENT0("skia", TRACE_FUNC);
if (fRoot) {
SkSVGLengthContext lctx(fContainerSize);
fRoot->renderNode(SkSVGRenderContext(canvas, fFontMgr, fResourceProvider, fIDMapper,
lctx, pctx, {nullptr, nullptr}),
SkSVGIRI(SkSVGIRI::Type::kLocal, SkSVGStringType(id)));
}
}
const SkSize& SkSVGDOM::containerSize() const {
return fContainerSize;
}
void SkSVGDOM::setContainerSize(const SkSize& containerSize) {
// TODO: inval
fContainerSize = containerSize;
}
sk_sp<SkSVGNode>* SkSVGDOM::findNodeById(const char* id) {
SkString idStr(id);
return this->fIDMapper.find(idStr);
}
// TODO(fuego): move this to SkSVGNode or its own CU.
bool SkSVGNode::setAttribute(const char* attributeName, const char* attributeValue) {
return set_string_attribute(sk_ref_sp(this), attributeName, attributeValue);
}