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Carla/source/modules/juce_gui_basics/drawables/juce_SVGParser.cpp

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  1. /*

  2.   ==============================================================================

  3. 

  4.    This file is part of the JUCE library.

  5.    Copyright (c) 2015 - ROLI Ltd.

  6. 

  7.    Permission is granted to use this software under the terms of either:

  8.    a) the GPL v2 (or any later version)

  9.    b) the Affero GPL v3

  10. 

  11.    Details of these licenses can be found at: www.gnu.org/licenses

  12. 

  13.    JUCE is distributed in the hope that it will be useful, but WITHOUT ANY

  14.    WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR

  15.    A PARTICULAR PURPOSE.  See the GNU General Public License for more details.

  16. 

  17.    ------------------------------------------------------------------------------

  18. 

  19.    To release a closed-source product which uses JUCE, commercial licenses are

  20.    available: visit www.juce.com for more information.

  21. 

  22.   ==============================================================================

  23. */

  24. 

  25. class SVGState

  26. {

  27. public:

  28.     //==============================================================================

  29.     explicit SVGState (const XmlElement* const topLevel)

  30.         : topLevelXml (topLevel, nullptr),

  31.           elementX (0), elementY (0),

  32.           width (512), height (512),

  33.           viewBoxW (0), viewBoxH (0)

  34.     {

  35.     }

  36. 

  37.     struct XmlPath

  38.     {

  39.         XmlPath (const XmlElement* e, const XmlPath* p) noexcept : xml (e), parent (p)  {}

  40. 

  41.         const XmlElement& operator*() const noexcept            { jassert (xml != nullptr); return *xml; }

  42.         const XmlElement* operator->() const noexcept           { return xml; }

  43.         XmlPath getChild (const XmlElement* e) const noexcept   { return XmlPath (e, this); }

  44. 

  45.         template <typename OperationType>

  46.         bool applyOperationToChildWithID (const String& id, OperationType& op) const

  47.         {

  48.             forEachXmlChildElement (*xml, e)

  49.             {

  50.                 XmlPath child (e, this);

  51. 

  52.                 if (e->compareAttribute ("id", id))

  53.                 {

  54.                     op (child);

  55.                     return true;

  56.                 }

  57. 

  58.                 if (child.applyOperationToChildWithID (id, op))

  59.                     return true;

  60.             }

  61. 

  62.             return false;

  63.         }

  64. 

  65.         const XmlElement* xml;

  66.         const XmlPath* parent;

  67.     };

  68. 

  69.     //==============================================================================

  70.     Drawable* parseSVGElement (const XmlPath& xml)

  71.     {

  72.         if (! xml->hasTagNameIgnoringNamespace ("svg"))

  73.             return nullptr;

  74. 

  75.         DrawableComposite* const drawable = new DrawableComposite();

  76. 

  77.         setCommonAttributes (*drawable, xml);

  78. 

  79.         SVGState newState (*this);

  80. 

  81.         if (xml->hasAttribute ("transform"))

  82.             newState.addTransform (xml);

  83. 

  84.         newState.elementX = getCoordLength (xml->getStringAttribute ("x",      String (newState.elementX)), viewBoxW);

  85.         newState.elementY = getCoordLength (xml->getStringAttribute ("y",      String (newState.elementY)), viewBoxH);

  86.         newState.width    = getCoordLength (xml->getStringAttribute ("width",  String (newState.width)),    viewBoxW);

  87.         newState.height   = getCoordLength (xml->getStringAttribute ("height", String (newState.height)),   viewBoxH);

  88. 

  89.         if (newState.width  <= 0) newState.width  = 100;

  90.         if (newState.height <= 0) newState.height = 100;

  91. 

  92.         Point<float> viewboxXY;

  93. 

  94.         if (xml->hasAttribute ("viewBox"))

  95.         {

  96.             const String viewBoxAtt (xml->getStringAttribute ("viewBox"));

  97.             String::CharPointerType viewParams (viewBoxAtt.getCharPointer());

  98.             Point<float> vwh;

  99. 

  100.             if (parseCoords (viewParams, viewboxXY, true)

  101.                  && parseCoords (viewParams, vwh, true)

  102.                  && vwh.x > 0

  103.                  && vwh.y > 0)

  104.             {

  105.                 newState.viewBoxW = vwh.x;

  106.                 newState.viewBoxH = vwh.y;

  107. 

  108.                 const int placementFlags = parsePlacementFlags (xml->getStringAttribute ("preserveAspectRatio").trim());

  109. 

  110.                 if (placementFlags != 0)

  111.                     newState.transform = RectanglePlacement (placementFlags)

  112.                                             .getTransformToFit (Rectangle<float> (viewboxXY.x, viewboxXY.y, vwh.x, vwh.y),

  113.                                                                 Rectangle<float> (newState.width, newState.height))

  114.                                             .followedBy (newState.transform);

  115.             }

  116.         }

  117.         else

  118.         {

  119.             if (viewBoxW == 0)  newState.viewBoxW = newState.width;

  120.             if (viewBoxH == 0)  newState.viewBoxH = newState.height;

  121.         }

  122. 

  123.         newState.parseSubElements (xml, *drawable);

  124. 

  125.         drawable->setContentArea (RelativeRectangle (RelativeCoordinate (viewboxXY.x),

  126.                                                      RelativeCoordinate (viewboxXY.x + newState.viewBoxW),

  127.                                                      RelativeCoordinate (viewboxXY.y),

  128.                                                      RelativeCoordinate (viewboxXY.y + newState.viewBoxH)));

  129.         drawable->resetBoundingBoxToContentArea();

  130. 

  131.         return drawable;

  132.     }

  133. 

  134.     //==============================================================================

  135.     void parsePathString (Path& path, const String& pathString) const

  136.     {

  137.         String::CharPointerType d (pathString.getCharPointer().findEndOfWhitespace());

  138. 

  139.         Point<float> subpathStart, last, last2, p1, p2, p3;

  140.         juce_wchar lastCommandChar = 0;

  141.         bool isRelative = true;

  142.         bool carryOn = true;

  143. 

  144.         const CharPointer_ASCII validCommandChars ("MmLlHhVvCcSsQqTtAaZz");

  145. 

  146.         while (! d.isEmpty())

  147.         {

  148.             if (validCommandChars.indexOf (*d) >= 0)

  149.             {

  150.                 lastCommandChar = d.getAndAdvance();

  151.                 isRelative = (lastCommandChar >= 'a' && lastCommandChar <= 'z');

  152.             }

  153. 

  154.             switch (lastCommandChar)

  155.             {

  156.             case 'M':

  157.             case 'm':

  158.             case 'L':

  159.             case 'l':

  160.                 if (parseCoordsOrSkip (d, p1, false))

  161.                 {

  162.                     if (isRelative)

  163.                         p1 += last;

  164. 

  165.                     if (lastCommandChar == 'M' || lastCommandChar == 'm')

  166.                     {

  167.                         subpathStart = p1;

  168.                         path.startNewSubPath (p1);

  169.                         lastCommandChar = 'l';

  170.                     }

  171.                     else

  172.                         path.lineTo (p1);

  173. 

  174.                     last2 = last;

  175.                     last = p1;

  176.                 }

  177.                 break;

  178. 

  179.             case 'H':

  180.             case 'h':

  181.                 if (parseCoord (d, p1.x, false, true))

  182.                 {

  183.                     if (isRelative)

  184.                         p1.x += last.x;

  185. 

  186.                     path.lineTo (p1.x, last.y);

  187. 

  188.                     last2.x = last.x;

  189.                     last.x = p1.x;

  190.                 }

  191.                 else

  192.                 {

  193.                     ++d;

  194.                 }

  195.                 break;

  196. 

  197.             case 'V':

  198.             case 'v':

  199.                 if (parseCoord (d, p1.y, false, false))

  200.                 {

  201.                     if (isRelative)

  202.                         p1.y += last.y;

  203. 

  204.                     path.lineTo (last.x, p1.y);

  205. 

  206.                     last2.y = last.y;

  207.                     last.y = p1.y;

  208.                 }

  209.                 else

  210.                 {

  211.                     ++d;

  212.                 }

  213.                 break;

  214. 

  215.             case 'C':

  216.             case 'c':

  217.                 if (parseCoordsOrSkip (d, p1, false)

  218.                      && parseCoordsOrSkip (d, p2, false)

  219.                      && parseCoordsOrSkip (d, p3, false))

  220.                 {

  221.                     if (isRelative)

  222.                     {

  223.                         p1 += last;

  224.                         p2 += last;

  225.                         p3 += last;

  226.                     }

  227. 

  228.                     path.cubicTo (p1, p2, p3);

  229. 

  230.                     last2 = p2;

  231.                     last = p3;

  232.                 }

  233.                 break;

  234. 

  235.             case 'S':

  236.             case 's':

  237.                 if (parseCoordsOrSkip (d, p1, false)

  238.                      && parseCoordsOrSkip (d, p3, false))

  239.                 {

  240.                     if (isRelative)

  241.                     {

  242.                         p1 += last;

  243.                         p3 += last;

  244.                     }

  245. 

  246.                     p2 = last + (last - last2);

  247.                     path.cubicTo (p2, p1, p3);

  248. 

  249.                     last2 = p1;

  250.                     last = p3;

  251.                 }

  252.                 break;

  253. 

  254.             case 'Q':

  255.             case 'q':

  256.                 if (parseCoordsOrSkip (d, p1, false)

  257.                      && parseCoordsOrSkip (d, p2, false))

  258.                 {

  259.                     if (isRelative)

  260.                     {

  261.                         p1 += last;

  262.                         p2 += last;

  263.                     }

  264. 

  265.                     path.quadraticTo (p1, p2);

  266. 

  267.                     last2 = p1;

  268.                     last = p2;

  269.                 }

  270.                 break;

  271. 

  272.             case 'T':

  273.             case 't':

  274.                 if (parseCoordsOrSkip (d, p1, false))

  275.                 {

  276.                     if (isRelative)

  277.                         p1 += last;

  278. 

  279.                     p2 = last + (last - last2);

  280.                     path.quadraticTo (p2, p1);

  281. 

  282.                     last2 = p2;

  283.                     last = p1;

  284.                 }

  285.                 break;

  286. 

  287.             case 'A':

  288.             case 'a':

  289.                 if (parseCoordsOrSkip (d, p1, false))

  290.                 {

  291.                     String num;

  292. 

  293.                     if (parseNextNumber (d, num, false))

  294.                     {

  295.                         const float angle = degreesToRadians (num.getFloatValue());

  296. 

  297.                         if (parseNextNumber (d, num, false))

  298.                         {

  299.                             const bool largeArc = num.getIntValue() != 0;

  300. 

  301.                             if (parseNextNumber (d, num, false))

  302.                             {

  303.                                 const bool sweep = num.getIntValue() != 0;

  304. 

  305.                                 if (parseCoordsOrSkip (d, p2, false))

  306.                                 {

  307.                                     if (isRelative)

  308.                                         p2 += last;

  309. 

  310.                                     if (last != p2)

  311.                                     {

  312.                                         double centreX, centreY, startAngle, deltaAngle;

  313.                                         double rx = p1.x, ry = p1.y;

  314. 

  315.                                         endpointToCentreParameters (last.x, last.y, p2.x, p2.y,

  316.                                                                     angle, largeArc, sweep,

  317.                                                                     rx, ry, centreX, centreY,

  318.                                                                     startAngle, deltaAngle);

  319. 

  320.                                         path.addCentredArc ((float) centreX, (float) centreY,

  321.                                                             (float) rx, (float) ry,

  322.                                                             angle, (float) startAngle, (float) (startAngle + deltaAngle),

  323.                                                             false);

  324. 

  325.                                         path.lineTo (p2);

  326.                                     }

  327. 

  328.                                     last2 = last;

  329.                                     last = p2;

  330.                                 }

  331.                             }

  332.                         }

  333.                     }

  334.                 }

  335. 

  336.                 break;

  337. 

  338.             case 'Z':

  339.             case 'z':

  340.                 path.closeSubPath();

  341.                 last = last2 = subpathStart;

  342.                 d = d.findEndOfWhitespace();

  343.                 lastCommandChar = 'M';

  344.                 break;

  345. 

  346.             default:

  347.                 carryOn = false;

  348.                 break;

  349.             }

  350. 

  351.             if (! carryOn)

  352.                 break;

  353.         }

  354. 

  355.         // paths that finish back at their start position often seem to be

  356.         // left without a 'z', so need to be closed explicitly..

  357.         if (path.getCurrentPosition() == subpathStart)

  358.             path.closeSubPath();

  359.     }

  360. 

  361. private:

  362.     //==============================================================================

  363.     const XmlPath topLevelXml;

  364.     float elementX, elementY, width, height, viewBoxW, viewBoxH;

  365.     AffineTransform transform;

  366.     String cssStyleText;

  367. 

  368.     static void setCommonAttributes (Drawable& d, const XmlPath& xml)

  369.     {

  370.         String compID (xml->getStringAttribute ("id"));

  371.         d.setName (compID);

  372.         d.setComponentID (compID);

  373. 

  374.         if (xml->getStringAttribute ("display") == "none")

  375.             d.setVisible (false);

  376.     }

  377. 

  378.     //==============================================================================

  379.     void parseSubElements (const XmlPath& xml, DrawableComposite& parentDrawable)

  380.     {

  381.         forEachXmlChildElement (*xml, e)

  382.             parentDrawable.addAndMakeVisible (parseSubElement (xml.getChild (e)));

  383.     }

  384. 

  385.     Drawable* parseSubElement (const XmlPath& xml)

  386.     {

  387.         {

  388.             Path path;

  389.             if (parsePathElement (xml, path))

  390.                 return parseShape (xml, path);

  391.         }

  392. 

  393.         const String tag (xml->getTagNameWithoutNamespace());

  394. 

  395.         if (tag == "g")         return parseGroupElement (xml);

  396.         if (tag == "svg")       return parseSVGElement (xml);

  397.         if (tag == "text")      return parseText (xml, true);

  398.         if (tag == "switch")    return parseSwitch (xml);

  399.         if (tag == "a")         return parseLinkElement (xml);

  400.         if (tag == "style")     parseCSSStyle (xml);

  401. 

  402.         return nullptr;

  403.     }

  404. 

  405.     bool parsePathElement (const XmlPath& xml, Path& path) const

  406.     {

  407.         const String tag (xml->getTagNameWithoutNamespace());

  408. 

  409.         if (tag == "path")      { parsePath (xml, path);           return true; }

  410.         if (tag == "rect")      { parseRect (xml, path);           return true; }

  411.         if (tag == "circle")    { parseCircle (xml, path);         return true; }

  412.         if (tag == "ellipse")   { parseEllipse (xml, path);        return true; }

  413.         if (tag == "line")      { parseLine (xml, path);           return true; }

  414.         if (tag == "polyline")  { parsePolygon (xml, true, path);  return true; }

  415.         if (tag == "polygon")   { parsePolygon (xml, false, path); return true; }

  416.         if (tag == "use")       { parseUse (xml, path);            return true; }

  417. 

  418.         return false;

  419.     }

  420. 

  421.     DrawableComposite* parseSwitch (const XmlPath& xml)

  422.     {

  423.         if (const XmlElement* const group = xml->getChildByName ("g"))

  424.             return parseGroupElement (xml.getChild (group));

  425. 

  426.         return nullptr;

  427.     }

  428. 

  429.     DrawableComposite* parseGroupElement (const XmlPath& xml)

  430.     {

  431.         DrawableComposite* const drawable = new DrawableComposite();

  432. 

  433.         setCommonAttributes (*drawable, xml);

  434. 

  435.         if (xml->hasAttribute ("transform"))

  436.         {

  437.             SVGState newState (*this);

  438.             newState.addTransform (xml);

  439. 

  440.             newState.parseSubElements (xml, *drawable);

  441.         }

  442.         else

  443.         {

  444.             parseSubElements (xml, *drawable);

  445.         }

  446. 

  447.         drawable->resetContentAreaAndBoundingBoxToFitChildren();

  448.         return drawable;

  449.     }

  450. 

  451.     DrawableComposite* parseLinkElement (const XmlPath& xml)

  452.     {

  453.         return parseGroupElement (xml); // TODO: support for making this clickable

  454.     }

  455. 

  456.     //==============================================================================

  457.     void parsePath (const XmlPath& xml, Path& path) const

  458.     {

  459.         parsePathString (path, xml->getStringAttribute ("d"));

  460. 

  461.         if (getStyleAttribute (xml, "fill-rule").trim().equalsIgnoreCase ("evenodd"))

  462.             path.setUsingNonZeroWinding (false);

  463.     }

  464. 

  465.     void parseRect (const XmlPath& xml, Path& rect) const

  466.     {

  467.         const bool hasRX = xml->hasAttribute ("rx");

  468.         const bool hasRY = xml->hasAttribute ("ry");

  469. 

  470.         if (hasRX || hasRY)

  471.         {

  472.             float rx = getCoordLength (xml, "rx", viewBoxW);

  473.             float ry = getCoordLength (xml, "ry", viewBoxH);

  474. 

  475.             if (! hasRX)

  476.                 rx = ry;

  477.             else if (! hasRY)

  478.                 ry = rx;

  479. 

  480.             rect.addRoundedRectangle (getCoordLength (xml, "x", viewBoxW),

  481.                                       getCoordLength (xml, "y", viewBoxH),

  482.                                       getCoordLength (xml, "width", viewBoxW),

  483.                                       getCoordLength (xml, "height", viewBoxH),

  484.                                       rx, ry);

  485.         }

  486.         else

  487.         {

  488.             rect.addRectangle (getCoordLength (xml, "x", viewBoxW),

  489.                                getCoordLength (xml, "y", viewBoxH),

  490.                                getCoordLength (xml, "width", viewBoxW),

  491.                                getCoordLength (xml, "height", viewBoxH));

  492.         }

  493.     }

  494. 

  495.     void parseCircle (const XmlPath& xml, Path& circle) const

  496.     {

  497.         const float cx = getCoordLength (xml, "cx", viewBoxW);

  498.         const float cy = getCoordLength (xml, "cy", viewBoxH);

  499.         const float radius = getCoordLength (xml, "r", viewBoxW);

  500. 

  501.         circle.addEllipse (cx - radius, cy - radius, radius * 2.0f, radius * 2.0f);

  502.     }

  503. 

  504.     void parseEllipse (const XmlPath& xml, Path& ellipse) const

  505.     {

  506.         const float cx      = getCoordLength (xml, "cx", viewBoxW);

  507.         const float cy      = getCoordLength (xml, "cy", viewBoxH);

  508.         const float radiusX = getCoordLength (xml, "rx", viewBoxW);

  509.         const float radiusY = getCoordLength (xml, "ry", viewBoxH);

  510. 

  511.         ellipse.addEllipse (cx - radiusX, cy - radiusY, radiusX * 2.0f, radiusY * 2.0f);

  512.     }

  513. 

  514.     void parseLine (const XmlPath& xml, Path& line) const

  515.     {

  516.         const float x1 = getCoordLength (xml, "x1", viewBoxW);

  517.         const float y1 = getCoordLength (xml, "y1", viewBoxH);

  518.         const float x2 = getCoordLength (xml, "x2", viewBoxW);

  519.         const float y2 = getCoordLength (xml, "y2", viewBoxH);

  520. 

  521.         line.startNewSubPath (x1, y1);

  522.         line.lineTo (x2, y2);

  523.     }

  524. 

  525.     void parsePolygon (const XmlPath& xml, const bool isPolyline, Path& path) const

  526.     {

  527.         const String pointsAtt (xml->getStringAttribute ("points"));

  528.         String::CharPointerType points (pointsAtt.getCharPointer());

  529.         Point<float> p;

  530. 

  531.         if (parseCoords (points, p, true))

  532.         {

  533.             Point<float> first (p), last;

  534. 

  535.             path.startNewSubPath (first);

  536. 

  537.             while (parseCoords (points, p, true))

  538.             {

  539.                 last = p;

  540.                 path.lineTo (p);

  541.             }

  542. 

  543.             if ((! isPolyline) || first == last)

  544.                 path.closeSubPath();

  545.         }

  546.     }

  547. 

  548.     void parseUse (const XmlPath& xml, Path& path) const

  549.     {

  550.         const String link (xml->getStringAttribute ("xlink:href"));

  551. 

  552.         if (link.startsWithChar ('#'))

  553.         {

  554.             const String linkedID = link.substring (1);

  555. 

  556.             struct UsePathOp

  557.             {

  558.                 const SVGState* state;

  559.                 Path* targetPath;

  560. 

  561.                 void operator() (const XmlPath& xmlPath)

  562.                 {

  563.                     state->parsePathElement (xmlPath, *targetPath);

  564.                 }

  565.             };

  566. 

  567.             UsePathOp op = { this, &path };

  568.             topLevelXml.applyOperationToChildWithID (linkedID, op);

  569.         }

  570.     }

  571. 

  572.     static String parseURL (const String& str)

  573.     {

  574.         if (str.startsWithIgnoreCase ("url"))

  575.             return str.fromFirstOccurrenceOf ("#", false, false)

  576.                       .upToLastOccurrenceOf (")", false, false).trim();

  577. 

  578.         return String();

  579.     }

  580. 

  581.     //==============================================================================

  582.     Drawable* parseShape (const XmlPath& xml, Path& path,

  583.                           const bool shouldParseTransform = true) const

  584.     {

  585.         if (shouldParseTransform && xml->hasAttribute ("transform"))

  586.         {

  587.             SVGState newState (*this);

  588.             newState.addTransform (xml);

  589. 

  590.             return newState.parseShape (xml, path, false);

  591.         }

  592. 

  593.         DrawablePath* dp = new DrawablePath();

  594.         setCommonAttributes (*dp, xml);

  595.         dp->setFill (Colours::transparentBlack);

  596. 

  597.         path.applyTransform (transform);

  598.         dp->setPath (path);

  599. 

  600.         dp->setFill (getPathFillType (path,

  601.                                       getStyleAttribute (xml, "fill"),

  602.                                       getStyleAttribute (xml, "fill-opacity"),

  603.                                       getStyleAttribute (xml, "opacity"),

  604.                                       pathContainsClosedSubPath (path) ? Colours::black

  605.                                                                        : Colours::transparentBlack));

  606. 

  607.         const String strokeType (getStyleAttribute (xml, "stroke"));

  608. 

  609.         if (strokeType.isNotEmpty() && ! strokeType.equalsIgnoreCase ("none"))

  610.         {

  611.             dp->setStrokeFill (getPathFillType (path, strokeType,

  612.                                                 getStyleAttribute (xml, "stroke-opacity"),

  613.                                                 getStyleAttribute (xml, "opacity"),

  614.                                                 Colours::transparentBlack));

  615. 

  616.             dp->setStrokeType (getStrokeFor (xml));

  617.         }

  618. 

  619.         const String strokeDashArray (getStyleAttribute (xml, "stroke-dasharray"));

  620. 

  621.         if (strokeDashArray.isNotEmpty())

  622.             parseDashArray (strokeDashArray, *dp);

  623. 

  624.         parseClipPath (xml, *dp);

  625. 

  626.         return dp;

  627.     }

  628. 

  629.     static bool pathContainsClosedSubPath (const Path& path) noexcept

  630.     {

  631.         for (Path::Iterator iter (path); iter.next();)

  632.             if (iter.elementType == Path::Iterator::closePath)

  633.                 return true;

  634. 

  635.         return false;

  636.     }

  637. 

  638.     void parseDashArray (const String& dashList, DrawablePath& dp) const

  639.     {

  640.         if (dashList.equalsIgnoreCase ("null") || dashList.equalsIgnoreCase ("none"))

  641.             return;

  642. 

  643.         Array<float> dashLengths;

  644. 

  645.         for (String::CharPointerType t = dashList.getCharPointer();;)

  646.         {

  647.             float value;

  648.             if (! parseCoord (t, value, true, true))

  649.                 break;

  650. 

  651.             dashLengths.add (value);

  652. 

  653.             t = t.findEndOfWhitespace();

  654. 

  655.             if (*t == ',')

  656.                 ++t;

  657.         }

  658. 

  659.         if (dashLengths.size() > 0)

  660.         {

  661.             float* const dashes = dashLengths.getRawDataPointer();

  662. 

  663.             for (int i = 0; i < dashLengths.size(); ++i)

  664.             {

  665.                 if (dashes[i] <= 0)  // SVG uses zero-length dashes to mean a dotted line

  666.                 {

  667.                     if (dashLengths.size() == 1)

  668.                         return;

  669. 

  670.                     const float nonZeroLength = 0.001f;

  671.                     dashes[i] = nonZeroLength;

  672. 

  673.                     const int pairedIndex = i ^ 1;

  674. 

  675.                     if (isPositiveAndBelow (pairedIndex, dashLengths.size())

  676.                           && dashes[pairedIndex] > nonZeroLength)

  677.                         dashes[pairedIndex] -= nonZeroLength;

  678.                 }

  679.             }

  680. 

  681.             dp.setDashLengths (dashLengths);

  682.         }

  683.     }

  684. 

  685.     void parseClipPath (const XmlPath& xml, Drawable& d) const

  686.     {

  687.         const String clipPath (getStyleAttribute (xml, "clip-path"));

  688. 

  689.         if (clipPath.isNotEmpty())

  690.         {

  691.             String urlID = parseURL (clipPath);

  692. 

  693.             if (urlID.isNotEmpty())

  694.             {

  695.                 struct GetClipPathOp

  696.                 {

  697.                     const SVGState* state;

  698.                     Drawable* target;

  699. 

  700.                     void operator() (const XmlPath& xmlPath)

  701.                     {

  702.                         state->applyClipPath (*target, xmlPath);

  703.                     }

  704.                 };

  705. 

  706.                 GetClipPathOp op = { this, &d };

  707.                 topLevelXml.applyOperationToChildWithID (urlID, op);

  708.             }

  709.         }

  710.     }

  711. 

  712.     void applyClipPath (Drawable& target, const XmlPath& xmlPath) const

  713.     {

  714.         if (xmlPath->hasTagNameIgnoringNamespace ("clipPath"))

  715.         {

  716.             // TODO: implement clipping..

  717.             ignoreUnused (target);

  718.         }

  719.     }

  720. 

  721.     void addGradientStopsIn (ColourGradient& cg, const XmlPath& fillXml) const

  722.     {

  723.         if (fillXml.xml != nullptr)

  724.         {

  725.             forEachXmlChildElementWithTagName (*fillXml, e, "stop")

  726.             {

  727.                 int index = 0;

  728.                 Colour col (parseColour (getStyleAttribute (fillXml.getChild (e), "stop-color"), index, Colours::black));

  729. 

  730.                 const String opacity (getStyleAttribute (fillXml.getChild (e), "stop-opacity", "1"));

  731.                 col = col.withMultipliedAlpha (jlimit (0.0f, 1.0f, opacity.getFloatValue()));

  732. 

  733.                 double offset = e->getDoubleAttribute ("offset");

  734. 

  735.                 if (e->getStringAttribute ("offset").containsChar ('%'))

  736.                     offset *= 0.01;

  737. 

  738.                 cg.addColour (jlimit (0.0, 1.0, offset), col);

  739.             }

  740.         }

  741.     }

  742. 

  743.     FillType getGradientFillType (const XmlPath& fillXml,

  744.                                   const Path& path,

  745.                                   const float opacity) const

  746.     {

  747.         ColourGradient gradient;

  748. 

  749.         {

  750.             const String id (fillXml->getStringAttribute ("xlink:href"));

  751. 

  752.             if (id.startsWithChar ('#'))

  753.             {

  754.                 struct SetGradientStopsOp

  755.                 {

  756.                     const SVGState* state;

  757.                     ColourGradient* gradient;

  758. 

  759.                     void operator() (const XmlPath& xml)

  760.                     {

  761.                         state->addGradientStopsIn (*gradient, xml);

  762.                     }

  763.                 };

  764. 

  765.                 SetGradientStopsOp op = { this, &gradient, };

  766.                 topLevelXml.applyOperationToChildWithID (id.substring (1), op);

  767.             }

  768.         }

  769. 

  770.         addGradientStopsIn (gradient, fillXml);

  771. 

  772.         if (gradient.getNumColours() > 0)

  773.         {

  774.             gradient.addColour (0.0, gradient.getColour (0));

  775.             gradient.addColour (1.0, gradient.getColour (gradient.getNumColours() - 1));

  776.         }

  777.         else

  778.         {

  779.             gradient.addColour (0.0, Colours::black);

  780.             gradient.addColour (1.0, Colours::black);

  781.         }

  782. 

  783.         if (opacity < 1.0f)

  784.             gradient.multiplyOpacity (opacity);

  785. 

  786.         jassert (gradient.getNumColours() > 0);

  787. 

  788.         gradient.isRadial = fillXml->hasTagNameIgnoringNamespace ("radialGradient");

  789. 

  790.         float gradientWidth = viewBoxW;

  791.         float gradientHeight = viewBoxH;

  792.         float dx = 0.0f;

  793.         float dy = 0.0f;

  794. 

  795.         const bool userSpace = fillXml->getStringAttribute ("gradientUnits").equalsIgnoreCase ("userSpaceOnUse");

  796. 

  797.         if (! userSpace)

  798.         {

  799.             const Rectangle<float> bounds (path.getBounds());

  800.             dx = bounds.getX();

  801.             dy = bounds.getY();

  802.             gradientWidth = bounds.getWidth();

  803.             gradientHeight = bounds.getHeight();

  804.         }

  805. 

  806.         if (gradient.isRadial)

  807.         {

  808.             if (userSpace)

  809.                 gradient.point1.setXY (dx + getCoordLength (fillXml->getStringAttribute ("cx", "50%"), gradientWidth),

  810.                                        dy + getCoordLength (fillXml->getStringAttribute ("cy", "50%"), gradientHeight));

  811.             else

  812.                 gradient.point1.setXY (dx + gradientWidth  * getCoordLength (fillXml->getStringAttribute ("cx", "50%"), 1.0f),

  813.                                        dy + gradientHeight * getCoordLength (fillXml->getStringAttribute ("cy", "50%"), 1.0f));

  814. 

  815.             const float radius = getCoordLength (fillXml->getStringAttribute ("r", "50%"), gradientWidth);

  816.             gradient.point2 = gradient.point1 + Point<float> (radius, 0.0f);

  817. 

  818.             //xxx (the fx, fy focal point isn't handled properly here..)

  819.         }

  820.         else

  821.         {

  822.             if (userSpace)

  823.             {

  824.                 gradient.point1.setXY (dx + getCoordLength (fillXml->getStringAttribute ("x1", "0%"), gradientWidth),

  825.                                        dy + getCoordLength (fillXml->getStringAttribute ("y1", "0%"), gradientHeight));

  826. 

  827.                 gradient.point2.setXY (dx + getCoordLength (fillXml->getStringAttribute ("x2", "100%"), gradientWidth),

  828.                                        dy + getCoordLength (fillXml->getStringAttribute ("y2", "0%"), gradientHeight));

  829.             }

  830.             else

  831.             {

  832.                 gradient.point1.setXY (dx + gradientWidth  * getCoordLength (fillXml->getStringAttribute ("x1", "0%"), 1.0f),

  833.                                        dy + gradientHeight * getCoordLength (fillXml->getStringAttribute ("y1", "0%"), 1.0f));

  834. 

  835.                 gradient.point2.setXY (dx + gradientWidth  * getCoordLength (fillXml->getStringAttribute ("x2", "100%"), 1.0f),

  836.                                        dy + gradientHeight * getCoordLength (fillXml->getStringAttribute ("y2", "0%"), 1.0f));

  837.             }

  838. 

  839.             if (gradient.point1 == gradient.point2)

  840.                 return Colour (gradient.getColour (gradient.getNumColours() - 1));

  841.         }

  842. 

  843.         FillType type (gradient);

  844. 

  845.         const AffineTransform gradientTransform (parseTransform (fillXml->getStringAttribute ("gradientTransform"))

  846.                                                     .followedBy (transform));

  847. 

  848.         if (gradient.isRadial)

  849.         {

  850.             type.transform = gradientTransform;

  851.         }

  852.         else

  853.         {

  854.             // Transform the perpendicular vector into the new coordinate space for the gradient.

  855.             // This vector is now the slope of the linear gradient as it should appear in the new coord space

  856.             const Point<float> perpendicular (Point<float> (gradient.point2.y - gradient.point1.y,

  857.                                                             gradient.point1.x - gradient.point2.x)

  858.                                                   .transformedBy (gradientTransform.withAbsoluteTranslation (0, 0)));

  859. 

  860.             const Point<float> newGradPoint1 (gradient.point1.transformedBy (gradientTransform));

  861.             const Point<float> newGradPoint2 (gradient.point2.transformedBy (gradientTransform));

  862. 

  863.             // Project the transformed gradient vector onto the transformed slope of the linear

  864.             // gradient as it should appear in the new coordinate space

  865.             const float scale = perpendicular.getDotProduct (newGradPoint2 - newGradPoint1)

  866.                                   / perpendicular.getDotProduct (perpendicular);

  867. 

  868.             type.gradient->point1 = newGradPoint1;

  869.             type.gradient->point2 = newGradPoint2 - perpendicular * scale;

  870.         }

  871. 

  872.         return type;

  873.     }

  874. 

  875.     FillType getPathFillType (const Path& path,

  876.                               const String& fill,

  877.                               const String& fillOpacity,

  878.                               const String& overallOpacity,

  879.                               const Colour defaultColour) const

  880.     {

  881.         float opacity = 1.0f;

  882. 

  883.         if (overallOpacity.isNotEmpty())

  884.             opacity = jlimit (0.0f, 1.0f, overallOpacity.getFloatValue());

  885. 

  886.         if (fillOpacity.isNotEmpty())

  887.             opacity *= (jlimit (0.0f, 1.0f, fillOpacity.getFloatValue()));

  888. 

  889.         String urlID = parseURL (fill);

  890. 

  891.         if (urlID.isNotEmpty())

  892.         {

  893.             struct GetFillTypeOp

  894.             {

  895.                 const SVGState* state;

  896.                 const Path* path;

  897.                 float opacity;

  898.                 FillType fillType;

  899. 

  900.                 void operator() (const XmlPath& xml)

  901.                 {

  902.                     if (xml->hasTagNameIgnoringNamespace ("linearGradient")

  903.                          || xml->hasTagNameIgnoringNamespace ("radialGradient"))

  904.                         fillType = state->getGradientFillType (xml, *path, opacity);

  905.                 }

  906.             };

  907. 

  908.             GetFillTypeOp op = { this, &path, opacity };

  909. 

  910.             if (topLevelXml.applyOperationToChildWithID (urlID, op))

  911.                 return op.fillType;

  912.         }

  913. 

  914.         if (fill.equalsIgnoreCase ("none"))

  915.             return Colours::transparentBlack;

  916. 

  917.         int i = 0;

  918.         return parseColour (fill, i, defaultColour).withMultipliedAlpha (opacity);

  919.     }

  920. 

  921.     static PathStrokeType::JointStyle getJointStyle (const String& join) noexcept

  922.     {

  923.         if (join.equalsIgnoreCase ("round"))  return PathStrokeType::curved;

  924.         if (join.equalsIgnoreCase ("bevel"))  return PathStrokeType::beveled;

  925. 

  926.         return PathStrokeType::mitered;

  927.     }

  928. 

  929.     static PathStrokeType::EndCapStyle getEndCapStyle (const String& cap) noexcept

  930.     {

  931.         if (cap.equalsIgnoreCase ("round"))   return PathStrokeType::rounded;

  932.         if (cap.equalsIgnoreCase ("square"))  return PathStrokeType::square;

  933. 

  934.         return PathStrokeType::butt;

  935.     }

  936. 

  937.     float getStrokeWidth (const String& strokeWidth) const noexcept

  938.     {

  939.         return transform.getScaleFactor() * getCoordLength (strokeWidth, viewBoxW);

  940.     }

  941. 

  942.     PathStrokeType getStrokeFor (const XmlPath& xml) const

  943.     {

  944.         return PathStrokeType (getStrokeWidth (getStyleAttribute (xml, "stroke-width", "1")),

  945.                                getJointStyle  (getStyleAttribute (xml, "stroke-linejoin")),

  946.                                getEndCapStyle (getStyleAttribute (xml, "stroke-linecap")));

  947.     }

  948. 

  949.     //==============================================================================

  950.     Drawable* parseText (const XmlPath& xml, bool shouldParseTransform)

  951.     {

  952.         if (shouldParseTransform && xml->hasAttribute ("transform"))

  953.         {

  954.             SVGState newState (*this);

  955.             newState.addTransform (xml);

  956. 

  957.             return newState.parseText (xml, false);

  958.         }

  959. 

  960.         Array<float> xCoords, yCoords, dxCoords, dyCoords;

  961. 

  962.         getCoordList (xCoords,  getInheritedAttribute (xml, "x"),  true, true);

  963.         getCoordList (yCoords,  getInheritedAttribute (xml, "y"),  true, false);

  964.         getCoordList (dxCoords, getInheritedAttribute (xml, "dx"), true, true);

  965.         getCoordList (dyCoords, getInheritedAttribute (xml, "dy"), true, false);

  966. 

  967.         const Font font (getFont (xml));

  968.         const String anchorStr = getStyleAttribute(xml, "text-anchor");

  969. 

  970.         DrawableComposite* dc = new DrawableComposite();

  971.         setCommonAttributes (*dc, xml);

  972. 

  973.         forEachXmlChildElement (*xml, e)

  974.         {

  975.             if (e->isTextElement())

  976.             {

  977.                 const String text (e->getText().trim());

  978. 

  979.                 DrawableText* dt = new DrawableText();

  980.                 dc->addAndMakeVisible (dt);

  981. 

  982.                 dt->setText (text);

  983.                 dt->setFont (font, true);

  984.                 dt->setTransform (transform);

  985. 

  986.                 int i = 0;

  987.                 dt->setColour (parseColour (getStyleAttribute (xml, "fill"), i, Colours::black)

  988.                                  .withMultipliedAlpha (getStyleAttribute (xml, "fill-opacity", "1").getFloatValue()));

  989. 

  990.                 Rectangle<float> bounds (xCoords[0], yCoords[0] - font.getAscent(),

  991.                                          font.getStringWidthFloat (text), font.getHeight());

  992. 

  993.                 if (anchorStr == "middle")   bounds.setX (bounds.getX() - bounds.getWidth() / 2.0f);

  994.                 else if (anchorStr == "end") bounds.setX (bounds.getX() - bounds.getWidth());

  995. 

  996.                 dt->setBoundingBox (bounds);

  997.             }

  998.             else if (e->hasTagNameIgnoringNamespace ("tspan"))

  999.             {

  1000.                 dc->addAndMakeVisible (parseText (xml.getChild (e), true));

  1001.             }

  1002.         }

  1003. 

  1004.         return dc;

  1005.     }

  1006. 

  1007.     Font getFont (const XmlPath& xml) const

  1008.     {

  1009.         const float fontSize = getCoordLength (getStyleAttribute (xml, "font-size"), 1.0f);

  1010. 

  1011.         int style = getStyleAttribute (xml, "font-style").containsIgnoreCase ("italic") ? Font::italic : Font::plain;

  1012. 

  1013.         if (getStyleAttribute (xml, "font-weight").containsIgnoreCase ("bold"))

  1014.             style |= Font::bold;

  1015. 

  1016.         const String family (getStyleAttribute (xml, "font-family"));

  1017. 

  1018.         return family.isEmpty() ? Font (fontSize, style)

  1019.                                 : Font (family, fontSize, style);

  1020.     }

  1021. 

  1022.     //==============================================================================

  1023.     void addTransform (const XmlPath& xml)

  1024.     {

  1025.         transform = parseTransform (xml->getStringAttribute ("transform"))

  1026.                         .followedBy (transform);

  1027.     }

  1028. 

  1029.     //==============================================================================

  1030.     bool parseCoord (String::CharPointerType& s, float& value, const bool allowUnits, const bool isX) const

  1031.     {

  1032.         String number;

  1033. 

  1034.         if (! parseNextNumber (s, number, allowUnits))

  1035.         {

  1036.             value = 0;

  1037.             return false;

  1038.         }

  1039. 

  1040.         value = getCoordLength (number, isX ? viewBoxW : viewBoxH);

  1041.         return true;

  1042.     }

  1043. 

  1044.     bool parseCoords (String::CharPointerType& s, Point<float>& p, const bool allowUnits) const

  1045.     {

  1046.         return parseCoord (s, p.x, allowUnits, true)

  1047.             && parseCoord (s, p.y, allowUnits, false);

  1048.     }

  1049. 

  1050.     bool parseCoordsOrSkip (String::CharPointerType& s, Point<float>& p, const bool allowUnits) const

  1051.     {

  1052.         if (parseCoords (s, p, allowUnits))

  1053.             return true;

  1054. 

  1055.         if (! s.isEmpty()) ++s;

  1056.         return false;

  1057.     }

  1058. 

  1059.     float getCoordLength (const String& s, const float sizeForProportions) const noexcept

  1060.     {

  1061.         float n = s.getFloatValue();

  1062.         const int len = s.length();

  1063. 

  1064.         if (len > 2)

  1065.         {

  1066.             const float dpi = 96.0f;

  1067. 

  1068.             const juce_wchar n1 = s [len - 2];

  1069.             const juce_wchar n2 = s [len - 1];

  1070. 

  1071.             if (n1 == 'i' && n2 == 'n')         n *= dpi;

  1072.             else if (n1 == 'm' && n2 == 'm')    n *= dpi / 25.4f;

  1073.             else if (n1 == 'c' && n2 == 'm')    n *= dpi / 2.54f;

  1074.             else if (n1 == 'p' && n2 == 'c')    n *= 15.0f;

  1075.             else if (n2 == '%')                 n *= 0.01f * sizeForProportions;

  1076.         }

  1077. 

  1078.         return n;

  1079.     }

  1080. 

  1081.     float getCoordLength (const XmlPath& xml, const char* attName, const float sizeForProportions) const noexcept

  1082.     {

  1083.         return getCoordLength (xml->getStringAttribute (attName), sizeForProportions);

  1084.     }

  1085. 

  1086.     void getCoordList (Array<float>& coords, const String& list, bool allowUnits, const bool isX) const

  1087.     {

  1088.         String::CharPointerType text (list.getCharPointer());

  1089.         float value;

  1090. 

  1091.         while (parseCoord (text, value, allowUnits, isX))

  1092.             coords.add (value);

  1093.     }

  1094. 

  1095.     //==============================================================================

  1096.     void parseCSSStyle (const XmlPath& xml)

  1097.     {

  1098.         cssStyleText = xml->getAllSubText() + "\n" + cssStyleText;

  1099.     }

  1100. 

  1101.     static String::CharPointerType findStyleItem (String::CharPointerType source, String::CharPointerType name)

  1102.     {

  1103.         const int nameLength = (int) name.length();

  1104. 

  1105.         while (! source.isEmpty())

  1106.         {

  1107.             if (source.getAndAdvance() == '.'

  1108.                  && CharacterFunctions::compareIgnoreCaseUpTo (source, name, nameLength) == 0)

  1109.             {

  1110.                 String::CharPointerType endOfName ((source + nameLength).findEndOfWhitespace());

  1111. 

  1112.                 if (*endOfName == '{')

  1113.                     return endOfName;

  1114.             }

  1115.         }

  1116. 

  1117.         return source;

  1118.     }

  1119. 

  1120.     String getStyleAttribute (const XmlPath& xml, StringRef attributeName,

  1121.                               const String& defaultValue = String()) const

  1122.     {

  1123.         if (xml->hasAttribute (attributeName))

  1124.             return xml->getStringAttribute (attributeName, defaultValue);

  1125. 

  1126.         const String styleAtt (xml->getStringAttribute ("style"));

  1127. 

  1128.         if (styleAtt.isNotEmpty())

  1129.         {

  1130.             const String value (getAttributeFromStyleList (styleAtt, attributeName, String()));

  1131. 

  1132.             if (value.isNotEmpty())

  1133.                 return value;

  1134.         }

  1135.         else if (xml->hasAttribute ("class"))

  1136.         {

  1137.             String::CharPointerType openBrace = findStyleItem (cssStyleText.getCharPointer(),

  1138.                                                                xml->getStringAttribute ("class").getCharPointer());

  1139. 

  1140.             if (! openBrace.isEmpty())

  1141.             {

  1142.                 String::CharPointerType closeBrace = CharacterFunctions::find (openBrace, (juce_wchar) '}');

  1143. 

  1144.                 if (closeBrace != openBrace)

  1145.                 {

  1146.                     const String value (getAttributeFromStyleList (String (openBrace + 1, closeBrace),

  1147.                                                                    attributeName, defaultValue));

  1148.                     if (value.isNotEmpty())

  1149.                         return value;

  1150.                 }

  1151.             }

  1152.         }

  1153. 

  1154.         if (xml.parent != nullptr)

  1155.             return getStyleAttribute (*xml.parent, attributeName, defaultValue);

  1156. 

  1157.         return defaultValue;

  1158.     }

  1159. 

  1160.     String getInheritedAttribute (const XmlPath& xml, StringRef attributeName) const

  1161.     {

  1162.         if (xml->hasAttribute (attributeName))

  1163.             return xml->getStringAttribute (attributeName);

  1164. 

  1165.         if (xml.parent != nullptr)

  1166.             return getInheritedAttribute  (*xml.parent, attributeName);

  1167. 

  1168.         return String();

  1169.     }

  1170. 

  1171.     static int parsePlacementFlags (const String& align) noexcept

  1172.     {

  1173.         if (align.isEmpty())

  1174.             return 0;

  1175. 

  1176.         if (align.containsIgnoreCase ("none"))

  1177.             return RectanglePlacement::stretchToFit;

  1178. 

  1179.         return (align.containsIgnoreCase ("slice") ? RectanglePlacement::fillDestination : 0)

  1180.              | (align.containsIgnoreCase ("xMin")  ? RectanglePlacement::xLeft

  1181.                                                    : (align.containsIgnoreCase ("xMax") ? RectanglePlacement::xRight

  1182.                                                                                         : RectanglePlacement::xMid))

  1183.              | (align.containsIgnoreCase ("yMin")  ? RectanglePlacement::yTop

  1184.                                                    : (align.containsIgnoreCase ("yMax") ? RectanglePlacement::yBottom

  1185.                                                                                         : RectanglePlacement::yMid));

  1186.     }

  1187. 

  1188.     //==============================================================================

  1189.     static bool isIdentifierChar (const juce_wchar c)

  1190.     {

  1191.         return CharacterFunctions::isLetter (c) || c == '-';

  1192.     }

  1193. 

  1194.     static String getAttributeFromStyleList (const String& list, StringRef attributeName, const String& defaultValue)

  1195.     {

  1196.         int i = 0;

  1197. 

  1198.         for (;;)

  1199.         {

  1200.             i = list.indexOf (i, attributeName);

  1201. 

  1202.             if (i < 0)

  1203.                 break;

  1204. 

  1205.             if ((i == 0 || (i > 0 && ! isIdentifierChar (list [i - 1])))

  1206.                  && ! isIdentifierChar (list [i + attributeName.length()]))

  1207.             {

  1208.                 i = list.indexOfChar (i, ':');

  1209. 

  1210.                 if (i < 0)

  1211.                     break;

  1212. 

  1213.                 int end = list.indexOfChar (i, ';');

  1214. 

  1215.                 if (end < 0)

  1216.                     end = 0x7ffff;

  1217. 

  1218.                 return list.substring (i + 1, end).trim();

  1219.             }

  1220. 

  1221.             ++i;

  1222.         }

  1223. 

  1224.         return defaultValue;

  1225.     }

  1226. 

  1227.     //==============================================================================

  1228.     static bool isStartOfNumber (juce_wchar c) noexcept

  1229.     {

  1230.         return CharacterFunctions::isDigit (c) || c == '-' || c == '+';

  1231.     }

  1232. 

  1233.     static bool parseNextNumber (String::CharPointerType& text, String& value, const bool allowUnits)

  1234.     {

  1235.         String::CharPointerType s (text);

  1236. 

  1237.         while (s.isWhitespace() || *s == ',')

  1238.             ++s;

  1239. 

  1240.         String::CharPointerType start (s);

  1241. 

  1242.         if (isStartOfNumber (*s))

  1243.             ++s;

  1244. 

  1245.         while (s.isDigit())

  1246.             ++s;

  1247. 

  1248.         if (*s == '.')

  1249.         {

  1250.             ++s;

  1251. 

  1252.             while (s.isDigit())

  1253.                 ++s;

  1254.         }

  1255. 

  1256.         if ((*s == 'e' || *s == 'E') && isStartOfNumber (s[1]))

  1257.         {

  1258.             s += 2;

  1259. 

  1260.             while (s.isDigit())

  1261.                 ++s;

  1262.         }

  1263. 

  1264.         if (allowUnits)

  1265.             while (s.isLetter())

  1266.                 ++s;

  1267. 

  1268.         if (s == start)

  1269.         {

  1270.             text = s;

  1271.             return false;

  1272.         }

  1273. 

  1274.         value = String (start, s);

  1275. 

  1276.         while (s.isWhitespace() || *s == ',')

  1277.             ++s;

  1278. 

  1279.         text = s;

  1280.         return true;

  1281.     }

  1282. 

  1283.     //==============================================================================

  1284.     static Colour parseColour (const String& s, int& index, const Colour defaultColour)

  1285.     {

  1286.         if (s [index] == '#')

  1287.         {

  1288.             uint32 hex[6] = { 0 };

  1289.             int numChars = 0;

  1290. 

  1291.             for (int i = 6; --i >= 0;)

  1292.             {

  1293.                 const int hexValue = CharacterFunctions::getHexDigitValue (s [++index]);

  1294. 

  1295.                 if (hexValue >= 0)

  1296.                     hex [numChars++] = (uint32) hexValue;

  1297.                 else

  1298.                     break;

  1299.             }

  1300. 

  1301.             if (numChars <= 3)

  1302.                 return Colour ((uint8) (hex [0] * 0x11),

  1303.                                (uint8) (hex [1] * 0x11),

  1304.                                (uint8) (hex [2] * 0x11));

  1305. 

  1306.             return Colour ((uint8) ((hex [0] << 4) + hex [1]),

  1307.                            (uint8) ((hex [2] << 4) + hex [3]),

  1308.                            (uint8) ((hex [4] << 4) + hex [5]));

  1309.         }

  1310. 

  1311.         if (s [index] == 'r'

  1312.               && s [index + 1] == 'g'

  1313.               && s [index + 2] == 'b')

  1314.         {

  1315.             const int openBracket = s.indexOfChar (index, '(');

  1316.             const int closeBracket = s.indexOfChar (openBracket, ')');

  1317. 

  1318.             if (openBracket >= 3 && closeBracket > openBracket)

  1319.             {

  1320.                 index = closeBracket;

  1321. 

  1322.                 StringArray tokens;

  1323.                 tokens.addTokens (s.substring (openBracket + 1, closeBracket), ",", "");

  1324.                 tokens.trim();

  1325.                 tokens.removeEmptyStrings();

  1326. 

  1327.                 if (tokens[0].containsChar ('%'))

  1328.                     return Colour ((uint8) roundToInt (2.55 * tokens[0].getDoubleValue()),

  1329.                                    (uint8) roundToInt (2.55 * tokens[1].getDoubleValue()),

  1330.                                    (uint8) roundToInt (2.55 * tokens[2].getDoubleValue()));

  1331.                 else

  1332.                     return Colour ((uint8) tokens[0].getIntValue(),

  1333.                                    (uint8) tokens[1].getIntValue(),

  1334.                                    (uint8) tokens[2].getIntValue());

  1335.             }

  1336.         }

  1337. 

  1338.         return Colours::findColourForName (s, defaultColour);

  1339.     }

  1340. 

  1341.     static AffineTransform parseTransform (String t)

  1342.     {

  1343.         AffineTransform result;

  1344. 

  1345.         while (t.isNotEmpty())

  1346.         {

  1347.             StringArray tokens;

  1348.             tokens.addTokens (t.fromFirstOccurrenceOf ("(", false, false)

  1349.                                .upToFirstOccurrenceOf (")", false, false),

  1350.                               ", ", "");

  1351. 

  1352.             tokens.removeEmptyStrings (true);

  1353. 

  1354.             float numbers[6];

  1355. 

  1356.             for (int i = 0; i < numElementsInArray (numbers); ++i)

  1357.                 numbers[i] = tokens[i].getFloatValue();

  1358. 

  1359.             AffineTransform trans;

  1360. 

  1361.             if (t.startsWithIgnoreCase ("matrix"))

  1362.             {

  1363.                 trans = AffineTransform (numbers[0], numbers[2], numbers[4],

  1364.                                          numbers[1], numbers[3], numbers[5]);

  1365.             }

  1366.             else if (t.startsWithIgnoreCase ("translate"))

  1367.             {

  1368.                 trans = AffineTransform::translation (numbers[0], numbers[1]);

  1369.             }

  1370.             else if (t.startsWithIgnoreCase ("scale"))

  1371.             {

  1372.                 trans = AffineTransform::scale (numbers[0], numbers[tokens.size() > 1 ? 1 : 0]);

  1373.             }

  1374.             else if (t.startsWithIgnoreCase ("rotate"))

  1375.             {

  1376.                 trans = AffineTransform::rotation (degreesToRadians (numbers[0]), numbers[1], numbers[2]);

  1377.             }

  1378.             else if (t.startsWithIgnoreCase ("skewX"))

  1379.             {

  1380.                 trans = AffineTransform::shear (std::tan (degreesToRadians (numbers[0])), 0.0f);

  1381.             }

  1382.             else if (t.startsWithIgnoreCase ("skewY"))

  1383.             {

  1384.                 trans = AffineTransform::shear (0.0f, std::tan (degreesToRadians (numbers[0])));

  1385.             }

  1386. 

  1387.             result = trans.followedBy (result);

  1388.             t = t.fromFirstOccurrenceOf (")", false, false).trimStart();

  1389.         }

  1390. 

  1391.         return result;

  1392.     }

  1393. 

  1394.     static void endpointToCentreParameters (const double x1, const double y1,

  1395.                                             const double x2, const double y2,

  1396.                                             const double angle,

  1397.                                             const bool largeArc, const bool sweep,

  1398.                                             double& rx, double& ry,

  1399.                                             double& centreX, double& centreY,

  1400.                                             double& startAngle, double& deltaAngle) noexcept

  1401.     {

  1402.         const double midX = (x1 - x2) * 0.5;

  1403.         const double midY = (y1 - y2) * 0.5;

  1404. 

  1405.         const double cosAngle = std::cos (angle);

  1406.         const double sinAngle = std::sin (angle);

  1407.         const double xp = cosAngle * midX + sinAngle * midY;

  1408.         const double yp = cosAngle * midY - sinAngle * midX;

  1409.         const double xp2 = xp * xp;

  1410.         const double yp2 = yp * yp;

  1411. 

  1412.         double rx2 = rx * rx;

  1413.         double ry2 = ry * ry;

  1414. 

  1415.         const double s = (xp2 / rx2) + (yp2 / ry2);

  1416.         double c;

  1417. 

  1418.         if (s <= 1.0)

  1419.         {

  1420.             c = std::sqrt (jmax (0.0, ((rx2 * ry2) - (rx2 * yp2) - (ry2 * xp2))

  1421.                                          / (( rx2 * yp2) + (ry2 * xp2))));

  1422. 

  1423.             if (largeArc == sweep)

  1424.                 c = -c;

  1425.         }

  1426.         else

  1427.         {

  1428.             const double s2 = std::sqrt (s);

  1429.             rx *= s2;

  1430.             ry *= s2;

  1431.             c = 0;

  1432.         }

  1433. 

  1434.         const double cpx = ((rx * yp) / ry) * c;

  1435.         const double cpy = ((-ry * xp) / rx) * c;

  1436. 

  1437.         centreX = ((x1 + x2) * 0.5) + (cosAngle * cpx) - (sinAngle * cpy);

  1438.         centreY = ((y1 + y2) * 0.5) + (sinAngle * cpx) + (cosAngle * cpy);

  1439. 

  1440.         const double ux = (xp - cpx) / rx;

  1441.         const double uy = (yp - cpy) / ry;

  1442.         const double vx = (-xp - cpx) / rx;

  1443.         const double vy = (-yp - cpy) / ry;

  1444. 

  1445.         const double length = juce_hypot (ux, uy);

  1446. 

  1447.         startAngle = acos (jlimit (-1.0, 1.0, ux / length));

  1448. 

  1449.         if (uy < 0)

  1450.             startAngle = -startAngle;

  1451. 

  1452.         startAngle += double_Pi * 0.5;

  1453. 

  1454.         deltaAngle = acos (jlimit (-1.0, 1.0, ((ux * vx) + (uy * vy))

  1455.                                                 / (length * juce_hypot (vx, vy))));

  1456. 

  1457.         if ((ux * vy) - (uy * vx) < 0)

  1458.             deltaAngle = -deltaAngle;

  1459. 

  1460.         if (sweep)

  1461.         {

  1462.             if (deltaAngle < 0)

  1463.                 deltaAngle += double_Pi * 2.0;

  1464.         }

  1465.         else

  1466.         {

  1467.             if (deltaAngle > 0)

  1468.                 deltaAngle -= double_Pi * 2.0;

  1469.         }

  1470. 

  1471.         deltaAngle = fmod (deltaAngle, double_Pi * 2.0);

  1472.     }

  1473. 

  1474.     SVGState& operator= (const SVGState&) JUCE_DELETED_FUNCTION;

  1475. };

  1476. 

  1477. 

  1478. //==============================================================================

  1479. Drawable* Drawable::createFromSVG (const XmlElement& svgDocument)

  1480. {

  1481.     SVGState state (&svgDocument);

  1482.     return state.parseSVGElement (SVGState::XmlPath (&svgDocument, nullptr));

  1483. }

  1484. 

  1485. Path Drawable::parseSVGPath (const String& svgPath)

  1486. {

  1487.     SVGState state (nullptr);

  1488.     Path p;

  1489.     state.parsePathString (p, svgPath);

  1490.     return p;

  1491. }