The Tor Browser: gfx/skia/trunk/src/svg/SkSVGParser.cpp@6474c204b198 (annotated)

gfx/skia/trunk/src/svg/SkSVGParser.cpp@6474c204b198 (annotated)

gfx/skia/trunk/src/svg/SkSVGParser.cpp

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #include "SkSVGParser.h"
 #include "SkSVGCircle.h"
 #include "SkSVGClipPath.h"
 #include "SkSVGDefs.h"
 #include "SkSVGEllipse.h"
 #include "SkSVGFeColorMatrix.h"
 #include "SkSVGFilter.h"
 #include "SkSVGG.h"
 #include "SkSVGImage.h"
 #include "SkSVGLine.h"
 #include "SkSVGLinearGradient.h"
 #include "SkSVGMask.h"
 #include "SkSVGMetadata.h"
 #include "SkSVGPath.h"
 #include "SkSVGPolygon.h"
 #include "SkSVGPolyline.h"
 #include "SkSVGRadialGradient.h"
 #include "SkSVGRect.h"
 #include "SkSVGSVG.h"
 #include "SkSVGStop.h"
 #include "SkSVGSymbol.h"
 #include "SkSVGText.h"
 #include "SkSVGUse.h"
 #include "SkTSearch.h"
 #include <stdio.h>
 static int gGeneratedMatrixID = 0;
 SkSVGParser::SkSVGParser(SkXMLParserError* errHandler) :
     SkXMLParser(errHandler),
     fHead(&fEmptyPaint), fIDs(256),
         fXMLWriter(&fStream), fCurrElement(NULL), fInSVG(false), fSuppressPaint(false) {
     fLastTransform.reset();
     fEmptyPaint.f_fill.set("black");
     fEmptyPaint.f_stroke.set("none");
     fEmptyPaint.f_strokeMiterlimit.set("4");
     fEmptyPaint.f_fillRule.set("winding");
     fEmptyPaint.f_opacity.set("1");
     fEmptyPaint.fNext = NULL;
     for (int index = SkSVGPaint::kInitial + 1; index < SkSVGPaint::kTerminal; index++) {
         SkString* initial = fEmptyPaint[index];
         if (initial->size() == 0)
             continue;
         fLastFlush[index]->set(*initial);
     }
 }
 SkSVGParser::~SkSVGParser() {
 }
 void SkSVGParser::Delete(SkTDArray<SkSVGElement*>& fChildren) {
     SkSVGElement** ptr;
     for (ptr = fChildren.begin(); ptr < fChildren.end(); ptr++) {
         Delete((*ptr)->fChildren);
         delete *ptr;
     }
 }
 int SkSVGParser::findAttribute(SkSVGBase* element, const char* attrValue,
         size_t len, bool isPaint) {
     const SkSVGAttribute* attributes;
     size_t count = element->getAttributes(&attributes);
     size_t result = 0;
     while (result < count) {
         if (strncmp(attributes->fName, attrValue, len) == 0 && strlen(attributes->fName) == len) {
             SkASSERT(result == (attributes->fOffset -
                 (isPaint ? sizeof(SkString) : sizeof(SkSVGElement))) / sizeof(SkString));
             return result;
         }
         attributes++;
         result++;
     }
     return -1;
 }
 #if 0
 const char* SkSVGParser::getFinal() {
     _startElement("screenplay");
     // generate defs
     SkSVGElement** ptr;
     for (ptr = fChildren.begin(); ptr < fChildren.end(); ptr++) {
         SkSVGElement* element = *ptr;
         translate(element, true);
     }
     // generate onLoad
     _startElement("event");
     _addAttribute("kind", "onLoad");
     _startElement("paint");
     _addAttribute("antiAlias", "true");
     _endElement();
     for (ptr = fChildren.begin(); ptr < fChildren.end(); ptr++) {
         SkSVGElement* element = *ptr;
         translate(element, false);
     }
     _endElement(); // event
     _endElement(); // screenplay
     Delete(fChildren);
     fStream.write("", 1);
     return fStream.getStream();
 }
 #endif
 SkString& SkSVGParser::getPaintLast(SkSVGPaint::Field field) {
     SkSVGPaint* state = fHead;
     do {
         SkString* attr = (*state)[field];
         SkASSERT(attr);
         if (attr->size() > 0)
             return *attr;
         state = state->fNext;
     } while (state);
     SkASSERT(0);
     SkASSERT(fEmptyPaint[field]);
     return *fEmptyPaint[field];
 }
 bool SkSVGParser::isStrokeAndFill(  SkSVGPaint** strokeState, SkSVGPaint** fillState) {
     SkSVGPaint* walking = fHead;
     bool stroke = false;
     bool fill = false;
     bool strokeSet = false;
     bool fillSet = false;
     while (walking != NULL) {
         if (strokeSet == false && walking->f_stroke.size() > 0) {
             stroke = walking->f_stroke.equals("none") == false;
             *strokeState = walking;
             strokeSet = true;
         }
         if (fillSet == false && walking->f_fill.size() > 0) {
             fill = walking->f_fill.equals("none") == false;
             *fillState = walking;
             fillSet = true;
         }
         walking = walking->fNext;
     }
     return stroke && fill;
 }
 bool SkSVGParser::onAddAttribute(const char name[], const char value[]) {
     return onAddAttributeLen(name, value, strlen(value));
 }
 bool SkSVGParser::onAddAttributeLen(const char name[], const char value[], size_t len) {
     if (fCurrElement == NULL)    // this signals we should ignore attributes for this element
         return true;
     if (fCurrElement->fIsDef == false && fCurrElement->fIsNotDef == false)
         return false; // also an ignored element
     size_t nameLen = strlen(name);
     int attrIndex = findAttribute(fCurrElement, name, nameLen, false);
     if (attrIndex == -1) {
         attrIndex = findAttribute(&fCurrElement->fPaintState, name, nameLen, true);
         if (attrIndex >= 0) {
             fCurrElement->fPaintState.addAttribute(*this, attrIndex, value, len);
             return false;
         }
         if (nameLen == 2 && strncmp("id", name, nameLen) == 0) {
             fCurrElement->f_id.set(value, len);
             return false;
         }
         if (strchr(name, ':') != 0) // part of a different namespace
             return false;
     }
     SkASSERT(attrIndex >= 0);
     fCurrElement->addAttribute(*this, attrIndex, value, len);
     return false;
 }
 bool SkSVGParser::onEndElement(const char elem[]) {
     int parentIndex = fParents.count() - 1;
     if (parentIndex >= 0) {
         SkSVGElement* element = fParents[parentIndex];
         element->onEndElement(*this);
         fParents.remove(parentIndex);
     }
     return false;
 }
 bool SkSVGParser::onStartElement(const char name[]) {
     return onStartElementLen(name, strlen(name));
 }
 bool SkSVGParser::onStartElementLen(const char name[], size_t len) {
     if (strncmp(name, "svg", len) == 0) {
         fInSVG = true;
     } else if (fInSVG == false)
         return false;
     const char* nextColon = strchr(name, ':');
     if (nextColon && (size_t)(nextColon - name) < len)
         return false;
     SkSVGTypes type = GetType(name, len);
 //    SkASSERT(type >= 0);
     if (type < 0) {
         type = SkSVGType_G;
 //        return true;
     }
     SkSVGElement* parent = fParents.count() > 0 ? fParents.top() : NULL;
     SkSVGElement* element = CreateElement(type, parent);
     bool result = false;
     if (parent) {
         element->fParent = parent;
         result = fParents.top()->onStartElement(element);
     } else
         *fChildren.append() = element;
     if (strncmp(name, "svg", len) != 0)
         *fParents.append() = element;
     fCurrElement = element;
     return result;
 }
 bool SkSVGParser::onText(const char text[], int len) {
     if (fInSVG == false)
         return false;
     SkSVGTypes type = fCurrElement->getType();
     if (type != SkSVGType_Text && type != SkSVGType_Tspan)
         return false;
     SkSVGText* textElement = (SkSVGText*) fCurrElement;
     textElement->f_text.set(text, len);
     return false;
 }
 static int32_t strokeFillID = 0;
 void SkSVGParser::translate(SkSVGElement* element, bool isDef) {
     SkSVGPaint::Push(&fHead, &element->fPaintState);
     bool isFlushable = element->isFlushable();
     if ((element->fIsDef == false && element->fIsNotDef == false) ||
         (element->fIsDef && isDef == false && element->fIsNotDef == false) ||
         (element->fIsDef == false && isDef && element->fIsNotDef)) {
         isFlushable = false;
     }
     SkSVGPaint* strokeState = NULL, * fillState = NULL;
     if (isFlushable)
         element->fPaintState.setSave(*this);
     if (isFlushable && isStrokeAndFill(&strokeState, &fillState)) {
         SkString& elementID = element->f_id;
         if (elementID.size() == 0) {
             elementID.set("sf");
             elementID.appendS32(++strokeFillID);
         }
         SkString saveStroke(strokeState->f_stroke);
         SkString saveFill(fillState->f_fill);
         strokeState->f_stroke.set("none");
         element->fPaintState.flush(*this, isFlushable, isDef);
         element->translate(*this, isDef);
         strokeState->f_stroke.set(saveStroke);
         fillState->f_fill.set("none");
         if (element->fPaintState.flush(*this, isFlushable, isDef)) {
             _startElement("add");
             _addAttributeLen("use", elementID.c_str(), elementID.size());
             _endElement();  // add
         }
         fillState->f_fill.set(saveFill);
     } else {
         element->fPaintState.flush(*this, isFlushable, isDef);
         if (isFlushable || element->isGroup())
             element->translate(*this, isDef);
     }
     SkSVGPaint::Pop(&fHead);
 }
 void SkSVGParser::translateMatrix(SkString& string, SkString* stringID) {
     if (string.size() == 0)
         return;
     if (stringID->size() > 0) {
         _startElement("add");
         _addAttribute("use", stringID->c_str());
         _endElement(); // add
         return;
     }
     SkASSERT(strncmp(string.c_str(), "matrix", 6) == 0);
     ++gGeneratedMatrixID;
     _startElement("matrix");
     char idStr[24];
     strcpy(idStr, "sk_matrix");
     sprintf(idStr + strlen(idStr), "%d", gGeneratedMatrixID);
     _addAttribute("id", idStr);
     stringID->set(idStr);
     const char* str = string.c_str();
     SkASSERT(strncmp(str, "matrix(", 7) == 0);
     str += 6;
     const char* strEnd = strrchr(str, ')');
     SkASSERT(strEnd != NULL);
     SkString mat(str, strEnd - str);
     ConvertToArray(mat);
     const char* elems[6];
     static const int order[] = {0, 3, 1, 4, 2, 5};
     const int* orderPtr = order;
     str = mat.c_str();
     strEnd = str + mat.size();
     while (str < strEnd) {
         elems[*orderPtr++] = str;
         while (str < strEnd && *str != ',' )
             str++;
         str++;
     }
     string.reset();
     for (int index = 0; index < 6; index++) {
         const char* end = strchr(elems[index], ',');
         if (end == NULL)
             end= strchr(elems[index], ']');
         string.append(elems[index], end - elems[index] + 1);
     }
     string.remove(string.size() - 1, 1);
     string.append(",0,0,1]");
     _addAttribute("matrix", string);
     _endElement();  // matrix
 }
 static bool is_whitespace(char ch) {
     return ch > 0 && ch <= ' ';
 }
 void SkSVGParser::ConvertToArray(SkString& vals) {
     vals.appendUnichar(']');
     char* valCh = (char*) vals.c_str();
     valCh[0] = '[';
     int index = 1;
     while (valCh[index] != ']') {
         while (is_whitespace(valCh[index]))
             index++;
         bool foundComma = false;
         char next;
         do {
             next = valCh[index++];
             if (next == ',') {
                 foundComma = true;
                 continue;
             }
             if (next == ']') {
                 index--;
                 goto undoLastComma;
             }
             if (next == ' ')
                 break;
             foundComma = false;
         } while (is_whitespace(next) == false);
         if (foundComma == false)
             valCh[index - 1] = ',';
     }
 undoLastComma:
     while (is_whitespace(valCh[--index]))
         ;
     if (valCh[index] == ',')
         valCh[index] = ' ';
 }
 #define CASE_NEW(type) case SkSVGType_##type : created = new SkSVG##type(); break
 SkSVGElement* SkSVGParser::CreateElement(SkSVGTypes type, SkSVGElement* parent) {
     SkSVGElement* created = NULL;
     switch (type) {
         CASE_NEW(Circle);
         CASE_NEW(ClipPath);
         CASE_NEW(Defs);
         CASE_NEW(Ellipse);
         CASE_NEW(FeColorMatrix);
         CASE_NEW(Filter);
         CASE_NEW(G);
         CASE_NEW(Image);
         CASE_NEW(Line);
         CASE_NEW(LinearGradient);
         CASE_NEW(Mask);
         CASE_NEW(Metadata);
         CASE_NEW(Path);
         CASE_NEW(Polygon);
         CASE_NEW(Polyline);
         CASE_NEW(RadialGradient);
         CASE_NEW(Rect);
         CASE_NEW(Stop);
         CASE_NEW(SVG);
         CASE_NEW(Symbol);
         CASE_NEW(Text);
         CASE_NEW(Tspan);
         CASE_NEW(Use);
         default:
             SkASSERT(0);
             return NULL;
     }
     created->fParent = parent;
     bool isDef = created->fIsDef = created->isDef();
     bool isNotDef = created->fIsNotDef = created->isNotDef();
     if (isDef) {
         SkSVGElement* up = parent;
         while (up && up->fIsDef == false) {
             up->fIsDef = true;
             up = up->fParent;
         }
     }
     if (isNotDef) {
         SkSVGElement* up = parent;
         while (up && up->fIsNotDef == false) {
             up->fIsNotDef = true;
             up = up->fParent;
         }
     }
     return created;
 }
 const SkSVGTypeName gSVGTypeNames[] = {
     {"circle", SkSVGType_Circle},
     {"clipPath", SkSVGType_ClipPath},
     {"defs", SkSVGType_Defs},
     {"ellipse", SkSVGType_Ellipse},
     {"feColorMatrix", SkSVGType_FeColorMatrix},
     {"filter", SkSVGType_Filter},
     {"g", SkSVGType_G},
     {"image", SkSVGType_Image},
     {"line", SkSVGType_Line},
     {"linearGradient", SkSVGType_LinearGradient},
     {"mask", SkSVGType_Mask},
     {"metadata", SkSVGType_Metadata},
     {"path", SkSVGType_Path},
     {"polygon", SkSVGType_Polygon},
     {"polyline", SkSVGType_Polyline},
     {"radialGradient", SkSVGType_RadialGradient},
     {"rect", SkSVGType_Rect},
     {"stop", SkSVGType_Stop},
     {"svg", SkSVGType_SVG},
     {"symbol", SkSVGType_Symbol},
     {"text", SkSVGType_Text},
     {"tspan", SkSVGType_Tspan},
     {"use", SkSVGType_Use}
 };
 const int kSVGTypeNamesSize = SK_ARRAY_COUNT(gSVGTypeNames);
 SkSVGTypes SkSVGParser::GetType(const char match[], size_t len ) {
     int index = SkStrSearch(&gSVGTypeNames[0].fName, kSVGTypeNamesSize, match,
         len, sizeof(gSVGTypeNames[0]));
     return index >= 0 && index < kSVGTypeNamesSize ? gSVGTypeNames[index].fType :
         (SkSVGTypes) -1;
 }

The Tor Browser / annotate

gfx/skia/trunk/src/svg/SkSVGParser.cpp@6474c204b198 (annotated)

gfx/skia/trunk/src/svg/SkSVGParser.cpp