summaryrefslogtreecommitdiffstats
path: root/ksvg/core/KSVGReader.cc
blob: 3fbbefd33533de120a8dbb1a80a2106fc07336ca (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
/*
    Copyright (C) 2001-2003 KSVG Team
    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 <dom/dom_exception.h>
#include <kdebug.h>
#include <tdelocale.h>
#include <tqmap.h>
#include <ksimpleconfig.h>
#include <KSVGCanvas.h>
#include "KSVGReader.moc"
#include "SVGSVGElementImpl.h"
#include "SVGViewSpecImpl.h"
#include "SVGDocumentImpl.h"
#include "SVGMatrixImpl.h"
#include "SVGShapeImpl.h"
#include "SVGLengthImpl.h"
#include "SVGImageElementImpl.h"
#include "SVGAnimatedLengthImpl.h"
#include "SVGUseElementImpl.h"

namespace KSVG
{

class Helper
{
public:
	static Helper *self(KSVGReader *reader = 0);

	void destroy();

	void setFit(bool bFit = true) { m_bFit = bFit; }
	bool fit() { return m_bFit; }

	SVGDocumentImpl *doc() const { return m_reader->doc(); }
	KSVGCanvas *canvas() const { return m_reader->canvas(); }

	void addSVGElement(SVGSVGElementImpl *one, DOM::NodeImpl *two) { m_svgMap.insert(two, one); }
	SVGSVGElementImpl *nextSVGElement(SVGElementImpl *elem);
	SVGSVGElementImpl *nextSVGElement(DOM::Node elem);
	void setFinished(bool error, const TQString &errorDesc = "") { m_reader->setFinished(error, errorDesc); }

	// Error handling
	void setErrorDescription(const TQString &err) { m_errorDesc = err; }
	TQString errorDescription() { return m_errorDesc; }
	bool hasError() const { return !m_errorDesc.isEmpty(); }

	bool getURLMode() const { return m_getURLMode; }
	void setGetURLMode(bool mode) { m_getURLMode = mode; }

	TQString SVGFragmentId() const { return m_SVGFragmentId; }
	void setSVGFragmentId(const TQString &SVGFragmentId) { m_SVGFragmentId = SVGFragmentId; }

protected:
	Helper(KSVGReader *reader);

private:
	Helper();
	Helper(const Helper &rhs);
	Helper &operator=(const Helper &rhs);

	static Helper *m_instance;
	TQMap<DOM::NodeImpl *, SVGSVGElementImpl *> m_svgMap;
	KSVGReader *m_reader;
	bool m_bFit;
	bool m_getURLMode;
	TQString m_errorDesc;
	TQString m_SVGFragmentId;
};

class InputHandler : public TQXmlDefaultHandler
{
public:
	virtual bool startDocument();
	virtual bool endDocument();
	virtual bool startElement(const TQString &namespaceURI,
	                          const TQString &localName,
	                          const TQString &qName,
	                          const TQXmlAttributes &atts);
	virtual bool endElement(const TQString &namespaceURI,
	                        const TQString &localName,
	                        const TQString &qName);
	virtual bool characters(const TQString &ch);
	virtual bool warning(const TQXmlParseException &e);
	virtual bool error(const TQXmlParseException &e);
	virtual bool fatalError(const TQXmlParseException &e);

private:
	DOM::Node *m_rootNode;
	DOM::Node *m_currentNode;
	DOM::Node m_parentNode;

	bool m_noRendering, m_progressive;
};

}

using namespace KSVG;

Helper *Helper::m_instance = 0;

Helper::Helper(KSVGReader *reader)
{
	m_reader = reader;
}

Helper *Helper::self(KSVGReader *reader)
{
	if(m_instance && reader != 0)
		m_instance->m_reader = reader;
	if(!m_instance)
	{
		Q_ASSERT(reader != 0);
		m_instance = new Helper(reader);
	}

	return m_instance;	
}

void Helper::destroy()
{
	m_svgMap.clear();
}

SVGSVGElementImpl *Helper::nextSVGElement(SVGElementImpl *elem)
{
	return nextSVGElement(*elem);
}

SVGSVGElementImpl *Helper::nextSVGElement(DOM::Node elem)
{
	DOM::Node foundSVG;
	DOM::Node shape = elem.parentNode();
	
	for(; !shape.isNull(); shape = shape.parentNode())
	{
		if(reinterpret_cast<DOM::Element &>(shape).nodeName() == "svg")
		{
			foundSVG = shape;
			break;
		}
	}

	SVGSVGElementImpl *svg = m_svgMap[foundSVG.handle()];
	return svg;
}

bool InputHandler::startDocument()
{
	m_rootNode = 0;
	m_currentNode = 0;
	m_noRendering = false;

	KSimpleConfig config("ksvgpluginrc");
	config.setGroup("Rendering");
	m_progressive = config.readBoolEntry("ProgressiveRendering", true);

	if(Helper::self()->canvas())
		Helper::self()->canvas()->setImmediateUpdate(m_progressive);

	return true;
}

bool InputHandler::endDocument()
{
	Helper::self()->setFinished(false);
        if (Helper::self()->canvas())
	        Helper::self()->canvas()->setImmediateUpdate(false);

	return true;
}

bool InputHandler::characters(const TQString &ch)
{
	kdDebug(26001) << "InputHandler::characters, read " << ch << endl;

	if(ch.simplifyWhiteSpace().isEmpty())
		return true;

	TQString t = ch;

	SVGSVGElementImpl *root = Helper::self()->nextSVGElement(*m_currentNode);
	if(root)
	{
		SVGElementImpl *element = root->ownerDoc()->getElementFromHandle(m_currentNode->handle());
		SVGLangSpaceImpl *langSpace = dynamic_cast<SVGLangSpaceImpl *>(element);
		
		if(langSpace)
			t = langSpace->handleText(ch);
	}

	if(!t.isEmpty())
	{
		DOM::Text impl = static_cast<DOM::Document *>(Helper::self()->doc())->createTextNode(t);
		m_currentNode->appendChild(impl);
	}

	return true;
}

bool InputHandler::startElement(const TQString &namespaceURI, const TQString &, const TQString &qName, const TQXmlAttributes &attrs)
{
	kdDebug(26001) << "InputHandler::startElement, namespaceURI " << namespaceURI << " qName " << qName << endl;

	SVGElementImpl *newElement = 0;
	SVGSVGElementImpl *svg = 0;

	if(qName == "svg")
	{
		DOM::Element impl = static_cast<DOM::Document *>(Helper::self()->doc())->createElementNS(namespaceURI, qName);
		newElement = SVGDocumentImpl::createElement(qName, impl, Helper::self()->doc());
		svg = dynamic_cast<SVGSVGElementImpl *>(newElement);

		Helper::self()->addSVGElement(svg, impl.handle());

		// Need this before we can find our ownerSVGElement (AP)
		if(m_currentNode != 0)
		{
			m_currentNode->appendChild(*svg);
		}
		else
		{
			if(Helper::self()->fit())
			{	// handle fitting of svg into small drawing area(thumb)
				// TODO : aspectratio? and what about svgs that dont provide width and height?
				if(attrs.value("viewBox").isEmpty())
				{
					SVGLengthImpl *width = SVGSVGElementImpl::createSVGLength();
					SVGLengthImpl *height = SVGSVGElementImpl::createSVGLength();
					width->setValueAsString(attrs.value("width"));
					height->setValueAsString(attrs.value("height"));
					TQString viewbox = TQString("0 0 %1 %2").arg(width->value()).arg(height->value());
					//kdDebug(26001) << "VIEWBOX : " << viewbox.latin1() << endl;
					// HACK
					// Does the existing attribute need to be deleted before appending the new attribute?
					const_cast<TQXmlAttributes&>(attrs).append("viewBox", TQString::null, "viewBox", viewbox);
					width->deref();
					height->deref();
				}
				// HACK
				// Does the existing attribute need to be deleted before appending the new attribute?
				const_cast<TQXmlAttributes&>(attrs).append("width", TQString::null, "width", TQString::number(Helper::self()->canvas()->width()));
				const_cast<TQXmlAttributes&>(attrs).append("height", TQString::null, "height", TQString::number(Helper::self()->canvas()->height()));
			}

			if(!Helper::self()->SVGFragmentId().isEmpty())
			{
				if(svg->currentView()->parseViewSpec(Helper::self()->SVGFragmentId()))
				{
					svg->setUseCurrentView(true);
				}
			}
		}

		if(m_rootNode == 0)
		{
			Helper::self()->doc()->appendChild(*svg);
			Helper::self()->doc()->setRootElement(svg);

			m_rootNode = svg;
		}
	}
	else
	{
		if(!m_rootNode && !Helper::self()->getURLMode())
		{
			Helper::self()->setErrorDescription(i18n("A legal svg document requires a <svg> root element"));
			return false;
		}

		DOM::Element impl = static_cast<DOM::Document *>(Helper::self()->doc())->createElementNS(namespaceURI, qName);
		newElement = SVGDocumentImpl::createElement(qName, impl, Helper::self()->doc());

		// m_currentNode == 0 if we are dynamically extending the dom (parsexml...)
		// and the file doesn't have a root element
		if(m_currentNode != 0)
			m_currentNode->appendChild(*newElement);
		else
			Helper::self()->doc()->appendChild(*newElement);

		// Special logics:
		if(qName == "switch" || qName == "pattern" || qName == "mask")
			m_noRendering = true;
	}

	newElement->setOwnerSVGElement(Helper::self()->nextSVGElement(newElement));
	newElement->setViewportElement(newElement->ownerSVGElement());

	newElement->setAttributes(attrs);

	if(svg && svg->ownerSVGElement() == 0)
	{
		SVGImageElementImpl *parentImage = Helper::self()->doc()->parentImage();

		if(parentImage)
		{
			// We're being displayed in a document via an 'image' element. Set
			// us up to fit into it's rectangle.
			parentImage->setupSVGElement(svg);
		}
	}

	SVGLocatableImpl *locatable = dynamic_cast<SVGLocatableImpl *>(newElement);

	if(locatable)
	{
		// Set up the cached screenCTM
		SVGLocatableImpl *locatableParent = 0;
		DOM::Node parentNode = newElement->parentNode();

		if(!parentNode.isNull())
		{
			SVGElementImpl *parent = Helper::self()->doc()->getElementFromHandle(parentNode.handle());

			if(parent)
				locatableParent = dynamic_cast<SVGLocatableImpl *>(parent);
		}

		SVGMatrixImpl *parentMatrix = 0;

		if(locatableParent)
			parentMatrix = locatableParent->getScreenCTM();
		else
			parentMatrix = SVGSVGElementImpl::createSVGMatrix();

		locatable->updateCachedScreenCTM(parentMatrix);
		parentMatrix->deref();
	}

	m_currentNode = newElement;
	return !Helper::self()->hasError();
}

bool InputHandler::endElement(const TQString &, const TQString &, const TQString &qName)
{
	kdDebug(26001) << "InputHandler::endElement, qName " << qName << endl;

	bool haveCanvas = Helper::self()->canvas();

	SVGSVGElementImpl *root = Helper::self()->nextSVGElement(*m_currentNode);
	SVGElementImpl *element = root ? root->ownerDoc()->getElementFromHandle(m_currentNode->handle()) : Helper::self()->doc()->getElementFromHandle(m_currentNode->handle());
	SVGShapeImpl *shape = dynamic_cast<SVGShapeImpl *>(element);
	SVGTestsImpl *tests = dynamic_cast<SVGTestsImpl *>(element);
	SVGStylableImpl *style = dynamic_cast<SVGStylableImpl *>(element);

	if(qName != "script" && !m_noRendering && !Helper::self()->getURLMode())
	{
		if(!root)
		{
			if(haveCanvas)
			{
				if(!m_progressive)
					Helper::self()->canvas()->update();

				Helper::self()->canvas()->blit();

				TQValueList<SVGUseElementImpl *> forwardReferencingUseElements = Helper::self()->doc()->forwardReferencingUseElements();

				if(!forwardReferencingUseElements.isEmpty())
				{
					// Create the elements again now that we have parsed the whole document.
					TQValueList<SVGUseElementImpl *>::iterator it;

					Helper::self()->canvas()->setImmediateUpdate(false);

					for(it = forwardReferencingUseElements.begin(); it != forwardReferencingUseElements.end(); it++)
						(*it)->createItem(Helper::self()->canvas());

					// The newly created items will need to be moved into their correct z-order positions.
					Helper::self()->doc()->resortZIndicesOnFinishedLoading();
				}
			}

			return true; // we have reached the bottom
		}

		if(haveCanvas && (tests ? tests->ok() : true))
		{
			if((shape && !shape->isContainer()) || (!shape && element))
				element->createItem();
		}
	}

	// Special logics:
	if(qName == "switch" || qName == "pattern" || qName == "mask")
	{
		m_noRendering = false;
		bool ok = tests ? tests->ok() : true;

		if((haveCanvas && element && style && ok && style->getDisplay() && style->getVisible() && (qName == "pattern")) || (shape && shape->directRender()))
			element->createItem();
	}

	m_parentNode = m_currentNode->parentNode();	// this is needed since otherwise we get temporary vars
	m_currentNode = &m_parentNode;
	
	return true;
}

bool InputHandler::warning(const TQXmlParseException &e)
{
	kdDebug(26001) << "[" << e.lineNumber() << ":" << e.columnNumber() << "]: WARNING: " << e.message() << endl;
	return true;
}

bool InputHandler::error(const TQXmlParseException &e)
{
	kdDebug(26001) << "[" << e.lineNumber() << ":" << e.columnNumber() << "]: ERROR: " << e.message() << endl;
	return true;
}

bool InputHandler::fatalError(const TQXmlParseException &e)
{
	TQString error;
	
	if(Helper::self()->hasError())
	{
		error = Helper::self()->errorDescription();
		Helper::self()->setErrorDescription(TQString());
	}
	else
		error = TQString("[%1:%2]: FATAL ERROR: %3").arg(e.lineNumber()).arg(e.columnNumber()).arg(e.message());

	kdDebug(26001) << "InputHandler::fatalError, " << error << endl;

	Helper::self()->setFinished(true, error);
	return true;
}

struct KSVGReader::Private
{
	TQXmlSimpleReader *reader;
	InputHandler *inputHandler;
	SVGDocumentImpl *doc;
	KSVGCanvas *canvas;
};

KSVGReader::KSVGReader(SVGDocumentImpl *doc, KSVGCanvas *canvas, ParsingArgs args) : TQObject(), d(new Private)
{
	d->doc = doc;
	d->canvas = canvas;

	d->reader = new TQXmlSimpleReader();
	d->inputHandler = new InputHandler();

	Helper::self(this);
	Helper::self()->setFit(args.fit);
	Helper::self()->setGetURLMode(args.getURLMode);
	Helper::self()->setSVGFragmentId(args.SVGFragmentId);

	d->reader->setContentHandler(d->inputHandler);
	d->reader->setErrorHandler(d->inputHandler);
}

KSVGReader::~KSVGReader()
{
	Helper::self()->destroy();

	delete d->reader;
	delete d->inputHandler;
	delete d;
}

void KSVGReader::parse(TQXmlInputSource *source)
{
	d->reader->parse(source);
}

void KSVGReader::finishParsing(bool, const TQString &errorDesc)
{
	Helper::self()->setErrorDescription(errorDesc);
}

void KSVGReader::setFinished(bool error, const TQString &errorDesc)
{
	kdDebug(26001) << "KSVGReader::setFinished" << endl;
	emit finished(error, errorDesc);
}

SVGDocumentImpl *KSVGReader::doc()
{
	return d->doc;
}

KSVG::KSVGCanvas *KSVGReader::canvas()
{
	return d->canvas;
}