Copy the KDE 3.5 branch to branches/trinity for new KDE 3.5 features.

BUG:215923


git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/kdelibs@1054174 283d02a7-25f6-0310-bc7c-ecb5cbfe19da

1 files changed, 686 insertions, 0 deletions

diff --git a/kdecore/svgicons/ksvgiconengine.cpp b/kdecore/svgicons/ksvgiconengine.cpp
new file mode 100644
index 000000000..66bf33f0b
--- /dev/null
+++ b/kdecore/svgicons/ksvgiconengine.cpp
@@ -0,0 +1,686 @@
+/*
+    Copyright (C) 2002 Nikolas Zimmermann <wildfox@kde.org>
+    This file is part of the KDE project
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Library General Public
+    License as published by the Free Software Foundation; either
+    version 2 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Library General Public License for more details.
+
+    You should have received a copy of the GNU Library General Public License
+    along with this library; see the file COPYING.LIB.  If not, write to
+    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+    Boston, MA 02110-1301, USA.
+*/
+
+#include <qdom.h>
+#include <qfile.h>
+#include <qcolor.h>
+#include <qimage.h>
+#include <qwmatrix.h>
+#include <qregexp.h>
+
+#include <kmdcodec.h>
+
+#include <zlib.h>
+
+#include "ksvgiconpainter.h"
+#include "ksvgiconengine.h"
+
+class KSVGIconEngineHelper
+{
+public:
+	KSVGIconEngineHelper(KSVGIconEngine *engine)
+	{
+		m_engine = engine;
+	}
+
+	~KSVGIconEngineHelper()
+	{
+	}
+
+	double toPixel(const QString &s, bool hmode)
+	{
+		return m_engine->painter()->toPixel(s, hmode);
+	}
+
+	ArtGradientStop *parseGradientStops(QDomElement element, int &offsets)
+	{
+		if (!element.hasChildNodes())
+			return 0;
+
+		QValueList<ArtGradientStop> stopList;
+
+		float oldOffset = -1, newOffset = -1;
+		for(QDomNode node = element.firstChild(); !node.isNull(); node = node.nextSibling())
+		{
+			QDomElement element = node.toElement();
+
+			oldOffset = newOffset;
+			QString temp = element.attribute("offset");
+
+			if(temp.contains("%"))
+			{
+				temp = temp.left(temp.length() - 1);
+				newOffset = temp.toFloat() / 100.0;
+			}
+			else
+				newOffset = temp.toFloat();
+
+			// Spec  skip double offset specifications
+			if(oldOffset == newOffset)
+				continue;
+
+			offsets++;
+			stopList.append(ArtGradientStop());
+
+			ArtGradientStop &stop = stopList.last();
+
+			stop.offset = newOffset;
+
+			QString parseOpacity;
+			QString parseColor;
+
+			if(element.hasAttribute("stop-opacity"))
+				parseOpacity = element.attribute("stop-opacity");
+
+			if(element.hasAttribute("stop-color"))
+				parseColor = element.attribute("stop-color");
+
+			if(parseOpacity.isEmpty() || parseColor.isEmpty())
+			{
+				QString style = element.attribute("style");
+
+				QStringList substyles = QStringList::split(';', style);
+				for(QStringList::Iterator it = substyles.begin(); it != substyles.end(); ++it)
+				{
+					QStringList substyle = QStringList::split(':', (*it));
+					QString command = substyle[0];
+					QString params = substyle[1];
+					command = command.stripWhiteSpace();
+					params = params.stripWhiteSpace();
+
+					if(command == "stop-color")
+					{
+						parseColor = params;
+
+						if(!parseOpacity.isEmpty())
+							break;
+					}
+					else if(command == "stop-opacity")
+					{
+						parseOpacity = params;
+
+						if(!parseColor.isEmpty())
+							break;
+					}
+				}
+			}
+
+			// Parse color using KSVGIconPainter (which uses Qt)
+			// Supports all svg-needed color formats
+			QColor qStopColor = m_engine->painter()->parseColor(parseColor);
+
+			// Convert in a libart suitable form
+			Q_UINT32 stopColor = m_engine->painter()->toArtColor(qStopColor);
+
+			int opacity = m_engine->painter()->parseOpacity(parseOpacity);
+
+			Q_UINT32 rgba = (stopColor << 8) | opacity;
+			Q_UINT32 r, g, b, a;
+
+			// Convert from separated to premultiplied alpha
+			a = rgba & 0xff;
+			r = (rgba >> 24) * a + 0x80;
+			r = (r + (r >> 8)) >> 8;
+			g = ((rgba >> 16) & 0xff) * a + 0x80;
+			g = (g + (g >> 8)) >> 8;
+			b = ((rgba >> 8) & 0xff) * a + 0x80;
+			b = (b + (b >> 8)) >> 8;
+
+			stop.color[0] = ART_PIX_MAX_FROM_8(r);
+			stop.color[1] = ART_PIX_MAX_FROM_8(g);
+			stop.color[2] = ART_PIX_MAX_FROM_8(b);
+			stop.color[3] = ART_PIX_MAX_FROM_8(a);
+		}
+
+		if (stopList.isEmpty())
+			return 0;
+
+		ArtGradientStop *stops = new ArtGradientStop[stopList.count()];
+
+		QValueList<ArtGradientStop>::iterator it = stopList.begin();
+		QValueList<ArtGradientStop>::iterator end = stopList.end();
+
+		for (int i = 0; it != end; ++i, ++it)
+			stops[i] = *it;
+
+		return stops;
+	}
+
+	QPointArray parsePoints(QString points)
+	{
+		if(points.isEmpty())
+			return QPointArray();
+
+		points = points.simplifyWhiteSpace();
+
+		if(points.contains(",,") || points.contains(", ,"))
+			return QPointArray();
+
+		points.replace(',', ' ');
+		points.replace('\r', QString::null);
+		points.replace('\n', QString::null);
+
+		points = points.simplifyWhiteSpace();
+
+		QStringList pointList = QStringList::split(' ', points);
+
+		QPointArray array(pointList.count() / 2);
+		int i = 0;
+
+		for(QStringList::Iterator it = pointList.begin(); it != pointList.end(); it++)
+		{
+			float x = (*(it++)).toFloat();
+			float y = (*(it)).toFloat();
+
+			array.setPoint(i, static_cast<int>(x), static_cast<int>(y));
+			i++;
+		}
+
+		return array;
+	}
+
+	void parseTransform(const QString &transform)
+	{
+		// Combine new and old matrix
+		QWMatrix matrix = m_engine->painter()->parseTransform(transform);
+
+		QWMatrix *current = m_engine->painter()->worldMatrix();
+		*current = matrix * *current;
+	}
+
+	void parseCommonAttributes(QDomNode &node)
+	{
+		// Set important default attributes
+		m_engine->painter()->setFillColor("black");
+		m_engine->painter()->setStrokeColor("none");
+		m_engine->painter()->setStrokeDashArray("");
+		m_engine->painter()->setStrokeWidth(1);
+		m_engine->painter()->setJoinStyle("");
+		m_engine->painter()->setCapStyle("");
+	//	m_engine->painter()->setFillOpacity(255, true);
+	//	m_engine->painter()->setStrokeOpacity(255, true);
+
+		// Collect parent node's attributes
+		QPtrList<QDomNamedNodeMap> applyList;
+		applyList.setAutoDelete(true);
+
+		QDomNode shape = node.parentNode();
+		for(; !shape.isNull() ; shape = shape.parentNode())
+			applyList.prepend(new QDomNamedNodeMap(shape.attributes()));
+
+		// Apply parent attributes
+		for(QDomNamedNodeMap *map = applyList.first(); map != 0; map = applyList.next())
+		{
+			QDomNamedNodeMap attr = *map;
+
+			for(unsigned int i = 0; i < attr.count(); i++)
+			{
+				QString name, value;
+
+				name = attr.item(i).nodeName().lower();
+				value = attr.item(i).nodeValue();
+
+				if(name == "transform")
+					parseTransform(value);
+				else if(name == "style")
+					parseStyle(value);
+				else
+					parsePA(name, value);
+			}
+		}
+
+		// Apply local attributes
+		QDomNamedNodeMap attr = node.attributes();
+
+		for(unsigned int i = 0; i < attr.count(); i++)
+		{
+			QDomNode current = attr.item(i);
+
+			if(current.nodeName().lower() == "transform")
+				parseTransform(current.nodeValue());
+			else if(current.nodeName().lower() == "style")
+				parseStyle(current.nodeValue());
+			else
+				parsePA(current.nodeName().lower(), current.nodeValue());
+		}
+	}
+
+	bool handleTags(QDomElement element, bool paint)
+	{
+		if(element.attribute("display") == "none")
+			return false;
+		if(element.tagName() == "linearGradient")
+		{
+			ArtGradientLinear *gradient = new ArtGradientLinear();
+
+			int offsets = -1;
+			gradient->stops = parseGradientStops(element, offsets);
+			gradient->n_stops = offsets + 1;
+
+			QString spread = element.attribute("spreadMethod");
+			if(spread == "repeat")
+				gradient->spread = ART_GRADIENT_REPEAT;
+			else if(spread == "reflect")
+				gradient->spread = ART_GRADIENT_REFLECT;
+			else
+				gradient->spread = ART_GRADIENT_PAD;
+
+			m_engine->painter()->addLinearGradient(element.attribute("id"), gradient);
+			m_engine->painter()->addLinearGradientElement(gradient, element);
+			return true;
+		}
+		else if(element.tagName() == "radialGradient")
+		{
+			ArtGradientRadial *gradient = new ArtGradientRadial();
+
+			int offsets = -1;
+			gradient->stops = parseGradientStops(element, offsets);
+			gradient->n_stops = offsets + 1;
+
+			m_engine->painter()->addRadialGradient(element.attribute("id"), gradient);
+			m_engine->painter()->addRadialGradientElement(gradient, element);
+			return true;
+		}
+
+		if(!paint)
+			return true;
+
+		// TODO: Default attribute values
+		if(element.tagName() == "rect")
+		{
+			double x = toPixel(element.attribute("x"), true);
+			double y = toPixel(element.attribute("y"), false);
+			double w = toPixel(element.attribute("width"), true);
+			double h = toPixel(element.attribute("height"), false);
+
+			double rx = 0.0;
+			double ry = 0.0;
+
+			if(element.hasAttribute("rx"))
+				rx = toPixel(element.attribute("rx"), true);
+
+			if(element.hasAttribute("ry"))
+				ry = toPixel(element.attribute("ry"), false);
+
+			m_engine->painter()->drawRectangle(x, y, w, h, rx, ry);
+		}
+		else if(element.tagName() == "switch")
+		{
+			QDomNode iterate = element.firstChild();
+
+			while(!iterate.isNull())
+			{
+				// Reset matrix
+				m_engine->painter()->setWorldMatrix(new QWMatrix(m_initialMatrix));
+
+				// Parse common attributes, style / transform
+				parseCommonAttributes(iterate);
+
+				if(handleTags(iterate.toElement(), true))
+					return true;
+				iterate = iterate.nextSibling();
+			}
+			return true;
+		}
+		else if(element.tagName() == "g" || element.tagName() == "defs")
+		{
+			QDomNode iterate = element.firstChild();
+
+			while(!iterate.isNull())
+			{
+				// Reset matrix
+				m_engine->painter()->setWorldMatrix(new QWMatrix(m_initialMatrix));
+
+				// Parse common attributes, style / transform
+				parseCommonAttributes(iterate);
+
+				handleTags(iterate.toElement(), (element.tagName() == "defs") ? false : true);
+				iterate = iterate.nextSibling();
+			}
+			return true;
+		}
+		else if(element.tagName() == "line")
+		{
+			double x1 = toPixel(element.attribute("x1"), true);
+			double y1 = toPixel(element.attribute("y1"), false);
+			double x2 = toPixel(element.attribute("x2"), true);
+			double y2 = toPixel(element.attribute("y2"), false);
+
+			m_engine->painter()->drawLine(x1, y1, x2, y2);
+			return true;
+		}
+		else if(element.tagName() == "circle")
+		{
+			double cx = toPixel(element.attribute("cx"), true);
+			double cy = toPixel(element.attribute("cy"), false);
+
+			double r = toPixel(element.attribute("r"), true); // TODO: horiz correct?
+
+			m_engine->painter()->drawEllipse(cx, cy, r, r);
+			return true;
+		}
+		else if(element.tagName() == "ellipse")
+		{
+			double cx = toPixel(element.attribute("cx"), true);
+			double cy = toPixel(element.attribute("cy"), false);
+
+			double rx = toPixel(element.attribute("rx"), true);
+			double ry = toPixel(element.attribute("ry"), false);
+
+			m_engine->painter()->drawEllipse(cx, cy, rx, ry);
+			return true;
+		}
+		else if(element.tagName() == "polyline")
+		{
+			QPointArray polyline = parsePoints(element.attribute("points"));
+			m_engine->painter()->drawPolyline(polyline);
+			return true;
+		}
+		else if(element.tagName() == "polygon")
+		{
+			QPointArray polygon = parsePoints(element.attribute("points"));
+			m_engine->painter()->drawPolygon(polygon);
+			return true;
+		}
+		else if(element.tagName() == "path")
+		{
+			bool filled = true;
+
+			if(element.hasAttribute("fill") && element.attribute("fill").contains("none"))
+				filled = false;
+
+			if(element.attribute("style").contains("fill") && element.attribute("style").stripWhiteSpace().contains("fill:none"))
+				filled = false;
+
+			m_engine->painter()->drawPath(element.attribute("d"), filled);
+			return true;
+		}
+		else if(element.tagName() == "image")
+		{
+			double x = toPixel(element.attribute("x"), true);
+			double y = toPixel(element.attribute("y"), false);
+			double w = toPixel(element.attribute("width"), true);
+			double h = toPixel(element.attribute("height"), false);
+
+			QString href = element.attribute("xlink:href");
+
+			QImage image;
+			if(href.startsWith("data:"))
+			{
+				// Get input
+				QCString input = href.remove(QRegExp("^data:image/.*;base64,")).utf8();
+
+				// Decode into 'output'
+				QByteArray output;
+				KCodecs::base64Decode(input, output);
+
+				// Display
+				image.loadFromData(output);
+			}
+			else
+				image.load(href);
+
+			if (!image.isNull())
+			{
+				// Scale, if needed
+				if(image.width() != (int) w || image.height() != (int) h)
+					image = image.smoothScale((int) w, (int) h, QImage::ScaleFree);
+
+				m_engine->painter()->drawImage(x, y, image);
+			}
+
+			return true;
+		}
+		return false;
+	}
+
+	void parseStyle(const QString &style)
+	{
+		QStringList substyles = QStringList::split(';', style);
+		for(QStringList::Iterator it = substyles.begin(); it != substyles.end(); ++it)
+		{
+			QStringList substyle = QStringList::split(':', (*it));
+			QString command = substyle[0];
+			QString params = substyle[1];
+			command = command.stripWhiteSpace();
+			params = params.stripWhiteSpace();
+
+			parsePA(command, params);
+		}
+	}
+
+	void parsePA(const QString &command, const QString &value)
+	{
+		if(command == "stroke-width") // TODO: horiz:false correct?
+			m_engine->painter()->setStrokeWidth(toPixel(value, false));
+		else if(command == "stroke-miterlimit")
+			m_engine->painter()->setStrokeMiterLimit(value);
+		else if(command == "stroke-linecap")
+			m_engine->painter()->setCapStyle(value);
+		else if(command == "stroke-linejoin")
+			m_engine->painter()->setJoinStyle(value);
+		else if(command == "stroke-dashoffset")
+			m_engine->painter()->setStrokeDashOffset(value);
+		else if(command == "stroke-dasharray" && value != "none")
+			m_engine->painter()->setStrokeDashArray(value);
+		else if(command == "stroke")
+			m_engine->painter()->setStrokeColor(value);
+		else if(command == "fill")
+			m_engine->painter()->setFillColor(value);
+		else if(command == "fill-rule")
+			m_engine->painter()->setFillRule(value);
+		else if(command == "fill-opacity" || command == "stroke-opacity" || command == "opacity")
+		{
+			if(command == "fill-opacity")
+				m_engine->painter()->setFillOpacity(value);
+			else if(command == "stroke-value")
+				m_engine->painter()->setStrokeOpacity(value);
+			else
+			{
+				m_engine->painter()->setOpacity(value);
+				m_engine->painter()->setFillOpacity(value);
+				m_engine->painter()->setStrokeOpacity(value);
+			}
+		}
+	}
+
+private:
+	friend class KSVGIconEngine;
+
+	KSVGIconEngine *m_engine;
+	QWMatrix m_initialMatrix;
+};
+
+struct KSVGIconEngine::Private
+{
+	KSVGIconPainter *painter;
+	KSVGIconEngineHelper *helper;
+
+	double width;
+	double height;
+};
+
+KSVGIconEngine::KSVGIconEngine() : d(new Private())
+{
+	d->painter = 0;
+	d->helper = new KSVGIconEngineHelper(this);
+
+	d->width = 0.0;
+	d->height = 0.0;
+}
+
+KSVGIconEngine::~KSVGIconEngine()
+{
+	if(d->painter)
+		delete d->painter;
+
+	delete d->helper;
+
+	delete d;
+}
+
+bool KSVGIconEngine::load(int width, int height, const QString &path)
+{
+	QDomDocument svgDocument("svg");
+	QFile file(path);
+
+	if(path.right(3).upper() == "SVG")
+	{
+		// Open SVG Icon
+		if(!file.open(IO_ReadOnly))
+			return false;
+
+		svgDocument.setContent(&file);
+	}
+	else // SVGZ
+	{
+		gzFile svgz = gzopen(path.latin1(), "ro");
+		if(!svgz)
+			return false;
+
+		QString data;
+		bool done = false;
+
+		QCString buffer(1024);
+		int length = 0;
+
+		while(!done)
+		{
+			int ret = gzread(svgz, buffer.data() + length, 1024);
+			if(ret == 0)
+				done = true;
+			else if(ret == -1)
+				return false;
+			else {
+				buffer.resize(buffer.size()+1024);
+				length += ret;
+			}
+		}
+
+		gzclose(svgz);
+
+		svgDocument.setContent(buffer);
+	}
+
+	if(svgDocument.isNull())
+		return false;
+
+	// Check for root element
+	QDomNode rootNode = svgDocument.namedItem("svg");
+	if(rootNode.isNull() || !rootNode.isElement())
+		return false;
+
+	// Detect width and height
+	QDomElement rootElement = rootNode.toElement();
+
+	// Create icon painter
+	d->painter = new KSVGIconPainter(width, height);
+
+	d->width = width; // this sets default for no width -> 100% case
+	if(rootElement.hasAttribute("width"))
+		d->width = d->helper->toPixel(rootElement.attribute("width"), true);
+
+	d->height = height; // this sets default for no height -> 100% case
+	if(rootElement.hasAttribute("height"))
+		d->height = d->helper->toPixel(rootElement.attribute("height"), false);
+
+	// Create icon painter
+	d->painter->setDrawWidth(static_cast<int>(d->width));
+	d->painter->setDrawHeight(static_cast<int>(d->height));
+
+	// Set viewport clipping rect
+	d->painter->setClippingRect(0, 0, width, height);
+
+	// Apply viewbox
+	if(rootElement.hasAttribute("viewBox"))
+	{
+		QStringList points = QStringList::split(' ', rootElement.attribute("viewBox").simplifyWhiteSpace());
+
+		float w = points[2].toFloat();
+		float h = points[3].toFloat();
+
+		double vratiow = width / w;
+		double vratioh = height / h;
+
+		d->width = w;
+		d->height = h;
+
+		d->painter->worldMatrix()->scale(vratiow, vratioh);
+	}
+	else
+	{
+		// Fit into 'width' and 'height'
+		// FIXME: Use an aspect ratio
+		double ratiow = width / d->width;
+		double ratioh = height / d->height;
+
+		d->painter->worldMatrix()->scale(ratiow, ratioh);
+	}
+
+	QWMatrix initialMatrix = *d->painter->worldMatrix();
+	d->helper->m_initialMatrix = initialMatrix;
+
+	// Apply transform
+	if(rootElement.hasAttribute("transform"))
+		d->helper->parseTransform(rootElement.attribute("transform"));
+
+	// Go through all elements
+	QDomNode svgNode = rootElement.firstChild();
+	while(!svgNode.isNull())
+	{
+		QDomElement svgChild = svgNode.toElement();
+		if(!svgChild.isNull())
+		{
+			d->helper->parseCommonAttributes(svgNode);
+			d->helper->handleTags(svgChild, true);
+		}
+
+		svgNode = svgNode.nextSibling();
+
+		// Reset matrix
+		d->painter->setWorldMatrix(new QWMatrix(initialMatrix));
+	}
+
+	d->painter->finish();
+
+	return true;
+}
+
+KSVGIconPainter *KSVGIconEngine::painter()
+{
+	return d->painter;
+}
+
+QImage *KSVGIconEngine::image()
+{
+	return d->painter->image();
+}
+
+double KSVGIconEngine::width()
+{
+	return d->width;
+}
+
+double KSVGIconEngine::height()
+{
+	return d->height;
+}
+
+// vim:ts=4:noet