summaryrefslogtreecommitdiffstats
path: root/khtml/misc/loader.h
blob: 05c297d7992c028f79d5b8877d5728679024136d (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
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
/*
    This file is part of the KDE libraries

    Copyright (C) 1998 Lars Knoll (knoll@mpi-hd.mpg.de)
    Copyright (C) 2001-2003 Dirk Mueller <mueller@kde.org>
    Copyright (C) 2003 Apple Computer, Inc

    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.

    This class provides all functionality needed for loading images, style sheets and html
    pages from the web. It has a memory cache for these objects.
*/
#ifndef _khtml_loader_h
#define _khtml_loader_h

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <time.h>

#include "loader_client.h"
#ifdef HAVE_LIBJPEG
#include "loader_jpeg.h"
#endif

#include <stdlib.h>
#include <tqptrlist.h>
#include <tqobject.h>
#include <tqptrdict.h>
#include <tqdict.h>
#include <tqpixmap.h>
#include <tqbuffer.h>
#include <tqstringlist.h>
#include <tqtextcodec.h>
#include <tqtimer.h>

#include <kurl.h>
#include <kio/global.h>

#include <khtml_settings.h>
#include <dom/dom_string.h>

class QMovie;
class KHTMLPart;

namespace KIO {
  class Job;
  class TransferJob;
}

namespace DOM
{
    class CSSStyleSheetImpl;
    class DocumentImpl;
}

namespace khtml
{
    class CachedObject;
    class Request;
    class DocLoader;

    /**
     * @internal
     *
     * A cached object. Classes who want to use this object should derive
     * from CachedObjectClient, to get the function calls in case the requested data has arrived.
     *
     * This class also does the actual communication with kio and loads the file.
     */
    class CachedObject
    {
    public:
	enum Type {
	    Image,
	    CSSStyleSheet,
	    Script
	};

	enum Status {
	    Unknown,      // let imagecache decide what to do with it
	    New,          // inserting new image
            Pending,      // only partially loaded
	    Persistent,   // never delete this pixmap
	    Cached        // regular case
	};

	CachedObject(const DOM::DOMString &url, Type type, KIO::CacheControl _cachePolicy, int size)
            : m_url(url), m_type(type), m_cachePolicy(_cachePolicy),
              m_expireDate(0), m_size(size)
	{
	    m_status = Pending;
            m_accessCount = 0;
	    m_cachePolicy = _cachePolicy;
	    m_request = 0;
            m_deleted = false;
            m_free = false;
            m_hadError = false;
            m_wasBlocked = false;
            m_prev = m_next = 0;
	}
        virtual ~CachedObject();

	virtual void data( TQBuffer &buffer, bool eof) = 0;
	virtual void error( int err, const char *text ) = 0;

	const DOM::DOMString &url() const { return m_url; }
	Type type() const { return m_type; }

	virtual void ref(CachedObjectClient *consumer);
	virtual void deref(CachedObjectClient *consumer);

	int count() const { return m_clients.count(); }
        int accessCount() const { return m_accessCount; }

	void setStatus(Status s) { m_status = s; }
	Status status() const { return m_status; }

        virtual void setCharset( const TQString& /*charset*/ ) {}

        TQTextCodec* codecForBuffer( const TQString& charset, const TQByteArray& buffer ) const;

	int size() const { return m_size; }

        bool isLoaded() const { return !m_loading; }

        bool free() const { return m_free; }

        KIO::CacheControl cachePolicy() const { return m_cachePolicy; }

        void setRequest(Request *_request);

        bool canDelete() const { return (m_clients.count() == 0 && !m_request); }

	void setExpireDate(time_t _expireDate) {  m_expireDate = _expireDate; }

	bool isExpired() const;

        virtual bool schedule() const { return false; }
	virtual void finish();

        /**
         * List of acceptable mimetypes separated by ",". A mimetype may contain a wildcard.
         */
        // e.g. "text/*"
        TQString accept() const { return m_accept; }
        void setAccept(const TQString &_accept) { m_accept = _accept; }

    protected:
        void setSize(int size);
        TQPtrDict<CachedObjectClient> m_clients;
	DOM::DOMString m_url;
        TQString m_accept;
        Request *m_request;
	Type m_type;
	Status m_status;
        int m_accessCount;
	KIO::CacheControl m_cachePolicy;
	time_t m_expireDate;
	int m_size;
        bool m_deleted : 1;
        bool m_loading : 1;
        bool m_free : 1;
	bool m_hadError : 1;
	bool m_wasBlocked : 1;

    private:
        bool allowInLRUList() const { return canDelete() && !m_free && status() != Persistent; }
        CachedObject* m_next;
        CachedObject* m_prev;
        friend class Cache;
        friend class ::KHTMLPart;
    };


    /**
     * a cached style sheet. also used for loading xml documents.
     *
     * ### rename to CachedTextDoc or something since it's more generic than just for css
     */
    class CachedCSSStyleSheet : public CachedObject
    {
    public:
	CachedCSSStyleSheet(DocLoader* dl, const DOM::DOMString &url, KIO::CacheControl cachePolicy,
			    const char *accept);
	CachedCSSStyleSheet(const DOM::DOMString &url, const TQString &stylesheet_data);

	const DOM::DOMString &sheet() const { return m_sheet; }

	virtual void ref(CachedObjectClient *consumer);

	virtual void data( TQBuffer &buffer, bool eof );
	virtual void error( int err, const char *text );

        virtual bool schedule() const { return true; }
        void setCharsetHint( const TQString& charset ) { m_charsetHint = charset; }
        void setCharset( const TQString& charset ) { m_charset = charset; }

    protected:
        void checkNotify();

	DOM::DOMString m_sheet;
        TQString m_charset;
        TQString m_charsetHint;
	int m_err;
	TQString m_errText;
    };

    /**
     * a cached script
     */
    class CachedScript : public CachedObject
    {
    public:
	CachedScript(DocLoader* dl, const DOM::DOMString &url, KIO::CacheControl cachePolicy, const char* accept );
	CachedScript(const DOM::DOMString &url, const TQString &script_data);

	const DOM::DOMString &script() const { return m_script; }

	virtual void ref(CachedObjectClient *consumer);

	virtual void data( TQBuffer &buffer, bool eof );
	virtual void error( int err, const char *text );

        virtual bool schedule() const { return false; }

	void checkNotify();

        bool isLoaded() const { return !m_loading; }
        void setCharset( const TQString& charset ) { m_charset = charset; }

    protected:
        TQString m_charset;
	DOM::DOMString m_script;
    };

    class ImageSource;

    /**
     * a cached image
     */
    class CachedImage : public TQObject, public CachedObject
    {
	Q_OBJECT
    public:
	CachedImage(DocLoader* dl, const DOM::DOMString &url, KIO::CacheControl cachePolicy, const char* accept);
	virtual ~CachedImage();

	const TQPixmap &pixmap() const;
	const TQPixmap &scaled_pixmap(int xWidth, int xHeight);
	const TQPixmap &tiled_pixmap(const TQColor& bg, int xWidth = -1, int xHeight = -1);

        TQSize pixmap_size() const;    // returns the size of the complete (i.e. when finished) loading
        TQRect valid_rect() const;     // returns the rectangle of pixmap that has been loaded already

        bool canRender() const { return !isErrorImage() && pixmap_size().width() > 0 && pixmap_size().height() > 0; }
        void ref(CachedObjectClient *consumer);
	virtual void deref(CachedObjectClient *consumer);

	virtual void data( TQBuffer &buffer, bool eof );
	virtual void error( int err, const char *text );

        bool isTransparent() const { return isFullyTransparent; }
        bool isErrorImage() const { return m_hadError; }
        bool isBlockedImage() const { return m_wasBlocked; }
        const TQString& suggestedFilename() const { return m_suggestedFilename; }
        void setSuggestedFilename( const TQString& s ) { m_suggestedFilename = s;  }
#ifdef IMAGE_TITLES
        const TQString& suggestedTitle() const { return m_suggestedTitle; }
        void setSuggestedTitle( const TQString& s ) { m_suggestedTitle = s;  }
#else
        const TQString& suggestedTitle() const { return m_suggestedFilename; }
#endif

        void setShowAnimations( KHTMLSettings::KAnimationAdvice );
        void pauseAnimations();
        void resumeAnimations();

        virtual bool schedule() const { return true; }

	virtual void finish();

    protected:
	void clear();

    private slots:
	/**
	 * gets called, whenever a TQMovie changes frame
	 */
	void movieUpdated( const TQRect &rect );
        void movieStatus(int);
        void movieResize(const TQSize&);
        void deleteMovie();

    private:
        void do_notify(const TQPixmap& p, const TQRect& r);

        TQString m_suggestedFilename;
#ifdef IMAGE_TITLES
        TQString m_suggestedTitle;
#endif
	TQMovie* m;
        TQPixmap* p;
	TQPixmap* scaled;
	TQPixmap* bg;
        QRgb bgColor;
        TQSize bgSize;
        mutable TQPixmap* pixPart;

        ImageSource* imgSource;
        const char* formatType;  // Is the name of the movie format type

	int width;
	int height;

	// Is set if movie format type ( incremental/animation) was checked
	bool typeChecked : 1;
        bool isFullyTransparent : 1;
        bool monochrome : 1;
        KHTMLSettings::KAnimationAdvice m_showAnimations : 2;

        friend class Cache;
        friend class ::KHTMLPart;
    };

    /**
     * @internal
     *
     * Manages the loading of scripts/images/stylesheets for a particular document
     */
    class DocLoader
    {
    public:
 	DocLoader(KHTMLPart*, DOM::DocumentImpl*);
 	~DocLoader();

	CachedImage *requestImage( const DOM::DOMString &url);
	CachedCSSStyleSheet *requestStyleSheet( const DOM::DOMString &url, const TQString& charsetHint,
						const char *accept = "text/css", bool userSheet = false );
        CachedScript *requestScript( const DOM::DOMString &url, const TQString& charset);

	bool autoloadImages() const { return m_bautoloadImages; }
        KIO::CacheControl cachePolicy() const { return m_cachePolicy; }
        KHTMLSettings::KAnimationAdvice showAnimations() const { return m_showAnimations; }
        time_t expireDate() const { return m_expireDate; }
        KHTMLPart* part() const { return m_part; }
        DOM::DocumentImpl* doc() const { return m_doc; }

        void setCacheCreationDate( time_t );
        void setExpireDate( time_t, bool relative );
        void setAutoloadImages( bool );
        void setCachePolicy( KIO::CacheControl cachePolicy ) { m_cachePolicy = cachePolicy; }
        void setShowAnimations( KHTMLSettings::KAnimationAdvice );
        void pauseAnimations();
        void resumeAnimations();
        void insertCachedObject( CachedObject* o ) const;
        void removeCachedObject( CachedObject* o) const { m_docObjects.remove( o ); }

    private:
        bool needReload(CachedObject *existing, const TQString &fullUrl);

        friend class Cache;
        friend class DOM::DocumentImpl;
        friend class ::KHTMLPart;

        TQStringList m_reloadedURLs;
        mutable TQPtrDict<CachedObject> m_docObjects;
	time_t m_expireDate;
	time_t m_creationDate;
	KIO::CacheControl m_cachePolicy;
        bool m_bautoloadImages : 1;
        KHTMLSettings::KAnimationAdvice m_showAnimations : 2;
        KHTMLPart* m_part;
        DOM::DocumentImpl* m_doc;
    };

    /**
     * @internal
     */
    class Request
    {
    public:
	Request(DocLoader* dl, CachedObject *_object, bool _incremental);
	~Request();
	bool incremental;
	TQBuffer m_buffer;
	CachedObject *object;
        DocLoader* m_docLoader;
    };

    /**
     * @internal
     */
    class Loader : public QObject
    {
	Q_OBJECT

    public:
	Loader();

	void load(DocLoader* dl, CachedObject *object, bool incremental = true);

        int numRequests( DocLoader* dl ) const;
        void cancelRequests( DocLoader* dl );

        // may return 0L
        KIO::Job *jobForRequest( const DOM::DOMString &url ) const;

    signals:
        void requestStarted( khtml::DocLoader* dl, khtml::CachedObject* obj );
	void requestDone( khtml::DocLoader* dl, khtml::CachedObject *obj );
	void requestFailed( khtml::DocLoader* dl, khtml::CachedObject *obj );

    protected slots:
	void slotFinished( KIO::Job * );
	void slotData( KIO::Job *, const TQByteArray & );
	void servePendingRequests();

    protected:
	TQPtrList<Request> m_requestsPending;
	TQPtrDict<Request> m_requestsLoading;
#ifdef HAVE_LIBJPEG
        KJPEGFormatType m_jpegloader;
#endif
        TQTimer m_timer;
    };

        /**
     * @internal
     *
     * Provides a cache/loader for objects needed for displaying the html page.
     * At the moment these are stylesheets, scripts and images
     */
    class Cache
    {
	friend class DocLoader;

        template<typename CachedObjectType, enum CachedObject::Type CachedType>
        static CachedObjectType* requestObject( DocLoader* dl, const KURL& kurl, const char* accept );

    public:
	/**
	 * init the cache in case it's not already. This needs to get called once
	 * before using it.
	 */
	KDE_EXPORT static void init();

	/**
	 * Ask the cache for some url. Will return a cachedObject, and
	 * load the requested data in case it's not cached
         * if the DocLoader is zero, the url must be full-qualified.
         * Otherwise, it is automatically base-url expanded
	 */
// 	static CachedImage *requestImage(const KURL& url)
//         { return Cache::requestObject<CachedImage, CachedObject::Image>( 0, url, 0 ); }

        /**
         * Pre-loads a stylesheet into the cache.
         */
        static void preloadStyleSheet(const TQString &url, const TQString &stylesheet_data);

        /**
         * Pre-loads a script into the cache.
         */
        static void preloadScript(const TQString &url, const TQString &script_data);

	static void setSize( int bytes );
	static int size() { return maxSize; };
	static void statistics();
	KDE_EXPORT static void flush(bool force=false);

	/**
	 * clears the cache
	 * Warning: call this only at the end of your program, to clean
	 * up memory (useful for finding memory holes)
	 */
	KDE_EXPORT static void clear();

	static Loader *loader() { return m_loader; }

    	static TQPixmap *nullPixmap;
        static TQPixmap *brokenPixmap;
        static TQPixmap *blockedPixmap;
        static int cacheSize;

        static void removeCacheEntry( CachedObject *object );

    private:

        static void checkLRUAndUncacheableListIntegrity();

        friend class CachedObject;

	static TQDict<CachedObject> *cache;
        static TQPtrList<DocLoader>* docloader;
        static TQPtrList<CachedObject> *freeList;
        static void insertInLRUList(CachedObject*);
        static void removeFromLRUList(CachedObject*);

        static int totalSizeOfLRU;
	static int maxSize;

	static Loader *m_loader;
    };

} // namespace

#endif