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523 lines
15 KiB
523 lines
15 KiB
/*
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This file is part of the KDE libraries
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Copyright (C) 1998 Lars Knoll (knoll@mpi-hd.mpg.de)
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Copyright (C) 2001-2003 Dirk Mueller <mueller@kde.org>
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Copyright (C) 2003 Apple Computer, Inc
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public License
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along with this library; see the file COPYING.LIB. If not, write to
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the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA.
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This class provides all functionality needed for loading images, style sheets and html
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pages from the web. It has a memory cache for these objects.
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*/
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#ifndef _tdehtml_loader_h
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#define _tdehtml_loader_h
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <time.h>
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#include "loader_client.h"
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#ifdef HAVE_LIBJPEG
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#include "loader_jpeg.h"
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#endif
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#include <stdlib.h>
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#include <tqptrlist.h>
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#include <tqobject.h>
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#include <tqptrdict.h>
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#include <tqdict.h>
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#include <tqpixmap.h>
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#include <tqbuffer.h>
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#include <tqstringlist.h>
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#include <tqtextcodec.h>
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#include <tqtimer.h>
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#include <kurl.h>
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#include <tdeio/global.h>
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#include <tdehtml_settings.h>
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#include <dom/dom_string.h>
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class TQMovie;
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class TDEHTMLPart;
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namespace TDEIO {
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class Job;
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class TransferJob;
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}
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namespace DOM
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{
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class CSSStyleSheetImpl;
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class DocumentImpl;
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}
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namespace tdehtml
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{
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class CachedObject;
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class Request;
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class DocLoader;
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/**
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* @internal
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*
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* A cached object. Classes who want to use this object should derive
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* from CachedObjectClient, to get the function calls in case the requested data has arrived.
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*
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* This class also does the actual communication with tdeio and loads the file.
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*/
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class CachedObject
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{
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public:
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enum Type {
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Image,
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CSSStyleSheet,
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Script
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};
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enum Status {
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Unknown, // let imagecache decide what to do with it
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New, // inserting new image
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Pending, // only partially loaded
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Persistent, // never delete this pixmap
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Cached // regular case
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};
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CachedObject(const DOM::DOMString &url, Type type, TDEIO::CacheControl _cachePolicy, int size)
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: m_url(url), m_type(type), m_cachePolicy(_cachePolicy),
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m_expireDate(0), m_size(size)
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{
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m_status = Pending;
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m_accessCount = 0;
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m_cachePolicy = _cachePolicy;
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m_request = 0;
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m_deleted = false;
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m_free = false;
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m_hadError = false;
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m_wasBlocked = false;
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m_prev = m_next = 0;
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}
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virtual ~CachedObject();
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virtual void data( TQBuffer &buffer, bool eof) = 0;
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virtual void error( int err, const char *text ) = 0;
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const DOM::DOMString &url() const { return m_url; }
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Type type() const { return m_type; }
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virtual void ref(CachedObjectClient *consumer);
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virtual void deref(CachedObjectClient *consumer);
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int count() const { return m_clients.count(); }
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int accessCount() const { return m_accessCount; }
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void setStatus(Status s) { m_status = s; }
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Status status() const { return m_status; }
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virtual void setCharset( const TQString& /*charset*/ ) {}
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TQTextCodec* codecForBuffer( const TQString& charset, const TQByteArray& buffer ) const;
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int size() const { return m_size; }
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bool isLoaded() const { return !m_loading; }
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bool free() const { return m_free; }
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TDEIO::CacheControl cachePolicy() const { return m_cachePolicy; }
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void setRequest(Request *_request);
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bool canDelete() const { return (m_clients.count() == 0 && !m_request); }
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void setExpireDate(time_t _expireDate) { m_expireDate = _expireDate; }
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bool isExpired() const;
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virtual bool schedule() const { return false; }
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virtual void finish();
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/**
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* List of acceptable mimetypes separated by ",". A mimetype may contain a wildcard.
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*/
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// e.g. "text/*"
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TQString accept() const { return m_accept; }
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void setAccept(const TQString &_accept) { m_accept = _accept; }
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protected:
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void setSize(int size);
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TQPtrDict<CachedObjectClient> m_clients;
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DOM::DOMString m_url;
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TQString m_accept;
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Request *m_request;
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Type m_type;
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Status m_status;
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int m_accessCount;
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TDEIO::CacheControl m_cachePolicy;
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time_t m_expireDate;
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int m_size;
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bool m_deleted : 1;
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bool m_loading : 1;
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bool m_free : 1;
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bool m_hadError : 1;
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bool m_wasBlocked : 1;
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private:
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bool allowInLRUList() const { return canDelete() && !m_free && status() != Persistent; }
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CachedObject* m_next;
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CachedObject* m_prev;
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friend class Cache;
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friend class ::TDEHTMLPart;
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};
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/**
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* a cached style sheet. also used for loading xml documents.
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*
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* ### rename to CachedTextDoc or something since it's more generic than just for css
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*/
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class CachedCSSStyleSheet : public CachedObject
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{
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public:
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CachedCSSStyleSheet(DocLoader* dl, const DOM::DOMString &url, TDEIO::CacheControl cachePolicy,
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const char *accept);
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CachedCSSStyleSheet(const DOM::DOMString &url, const TQString &stylesheet_data);
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const DOM::DOMString &sheet() const { return m_sheet; }
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virtual void ref(CachedObjectClient *consumer);
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virtual void data( TQBuffer &buffer, bool eof );
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virtual void error( int err, const char *text );
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virtual bool schedule() const { return true; }
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void setCharsetHint( const TQString& charset ) { m_charsetHint = charset; }
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void setCharset( const TQString& charset ) { m_charset = charset; }
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protected:
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void checkNotify();
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DOM::DOMString m_sheet;
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TQString m_charset;
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TQString m_charsetHint;
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int m_err;
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TQString m_errText;
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};
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/**
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* a cached script
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*/
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class CachedScript : public CachedObject
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{
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public:
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CachedScript(DocLoader* dl, const DOM::DOMString &url, TDEIO::CacheControl cachePolicy, const char* accept );
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CachedScript(const DOM::DOMString &url, const TQString &script_data);
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const DOM::DOMString &script() const { return m_script; }
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virtual void ref(CachedObjectClient *consumer);
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virtual void data( TQBuffer &buffer, bool eof );
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virtual void error( int err, const char *text );
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virtual bool schedule() const { return false; }
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void checkNotify();
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bool isLoaded() const { return !m_loading; }
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void setCharset( const TQString& charset ) { m_charset = charset; }
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protected:
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TQString m_charset;
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DOM::DOMString m_script;
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};
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class ImageSource;
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/**
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* a cached image
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*/
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class CachedImage : public TQObject, public CachedObject
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{
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Q_OBJECT
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public:
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CachedImage(DocLoader* dl, const DOM::DOMString &url, TDEIO::CacheControl cachePolicy, const char* accept);
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virtual ~CachedImage();
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const TQPixmap &pixmap() const;
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const TQPixmap &scaled_pixmap(int xWidth, int xHeight);
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const TQPixmap &tiled_pixmap(const TQColor& bg, int xWidth = -1, int xHeight = -1);
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TQSize pixmap_size() const; // returns the size of the complete (i.e. when finished) loading
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TQRect valid_rect() const; // returns the rectangle of pixmap that has been loaded already
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bool canRender() const { return !isErrorImage() && pixmap_size().width() > 0 && pixmap_size().height() > 0; }
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void ref(CachedObjectClient *consumer);
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virtual void deref(CachedObjectClient *consumer);
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virtual void data( TQBuffer &buffer, bool eof );
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virtual void error( int err, const char *text );
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bool isTransparent() const { return isFullyTransparent; }
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bool isErrorImage() const { return m_hadError; }
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bool isBlockedImage() const { return m_wasBlocked; }
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const TQString& suggestedFilename() const { return m_suggestedFilename; }
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void setSuggestedFilename( const TQString& s ) { m_suggestedFilename = s; }
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#ifdef IMAGE_TITLES
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const TQString& suggestedTitle() const { return m_suggestedTitle; }
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void setSuggestedTitle( const TQString& s ) { m_suggestedTitle = s; }
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#else
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const TQString& suggestedTitle() const { return m_suggestedFilename; }
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#endif
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void setShowAnimations( TDEHTMLSettings::KAnimationAdvice );
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void pauseAnimations();
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void resumeAnimations();
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virtual bool schedule() const { return true; }
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virtual void finish();
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protected:
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void clear();
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private slots:
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/**
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* gets called, whenever a TQMovie changes frame
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*/
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void movieUpdated( const TQRect &rect );
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void movieStatus(int);
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void movieResize(const TQSize&);
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void deleteMovie();
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private:
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void do_notify(const TQPixmap& p, const TQRect& r);
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TQString m_suggestedFilename;
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#ifdef IMAGE_TITLES
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TQString m_suggestedTitle;
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#endif
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TQMovie* m;
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TQPixmap* p;
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TQPixmap* scaled;
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TQPixmap* bg;
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QRgb bgColor;
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TQSize bgSize;
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mutable TQPixmap* pixPart;
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ImageSource* imgSource;
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const char* formatType; // Is the name of the movie format type
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int width;
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int height;
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// Is set if movie format type ( incremental/animation) was checked
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bool typeChecked : 1;
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bool isFullyTransparent : 1;
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bool monochrome : 1;
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TDEHTMLSettings::KAnimationAdvice m_showAnimations : 2;
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friend class Cache;
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friend class ::TDEHTMLPart;
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};
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/**
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* @internal
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*
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* Manages the loading of scripts/images/stylesheets for a particular document
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*/
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class DocLoader
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{
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public:
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DocLoader(TDEHTMLPart*, DOM::DocumentImpl*);
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~DocLoader();
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CachedImage *requestImage( const DOM::DOMString &url);
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CachedCSSStyleSheet *requestStyleSheet( const DOM::DOMString &url, const TQString& charsetHint,
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const char *accept = "text/css", bool userSheet = false );
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CachedScript *requestScript( const DOM::DOMString &url, const TQString& charset);
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bool autoloadImages() const { return m_bautoloadImages; }
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TDEIO::CacheControl cachePolicy() const { return m_cachePolicy; }
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TDEHTMLSettings::KAnimationAdvice showAnimations() const { return m_showAnimations; }
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time_t expireDate() const { return m_expireDate; }
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TDEHTMLPart* part() const { return m_part; }
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DOM::DocumentImpl* doc() const { return m_doc; }
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void setCacheCreationDate( time_t );
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void setExpireDate( time_t, bool relative );
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void setAutoloadImages( bool );
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void setCachePolicy( TDEIO::CacheControl cachePolicy ) { m_cachePolicy = cachePolicy; }
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void setShowAnimations( TDEHTMLSettings::KAnimationAdvice );
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void pauseAnimations();
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void resumeAnimations();
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void insertCachedObject( CachedObject* o ) const;
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void removeCachedObject( CachedObject* o) const { m_docObjects.remove( o ); }
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private:
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bool needReload(CachedObject *existing, const TQString &fullUrl);
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friend class Cache;
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friend class DOM::DocumentImpl;
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friend class ::TDEHTMLPart;
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TQStringList m_reloadedURLs;
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mutable TQPtrDict<CachedObject> m_docObjects;
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time_t m_expireDate;
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time_t m_creationDate;
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TDEIO::CacheControl m_cachePolicy;
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bool m_bautoloadImages : 1;
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TDEHTMLSettings::KAnimationAdvice m_showAnimations : 2;
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TDEHTMLPart* m_part;
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DOM::DocumentImpl* m_doc;
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};
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/**
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* @internal
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*/
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class Request
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{
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public:
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Request(DocLoader* dl, CachedObject *_object, bool _incremental);
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~Request();
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bool incremental;
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TQBuffer m_buffer;
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CachedObject *object;
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DocLoader* m_docLoader;
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};
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/**
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* @internal
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*/
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class Loader : public TQObject
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{
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Q_OBJECT
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public:
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Loader();
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void load(DocLoader* dl, CachedObject *object, bool incremental = true);
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int numRequests( DocLoader* dl ) const;
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void cancelRequests( DocLoader* dl );
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// may return 0L
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TDEIO::Job *jobForRequest( const DOM::DOMString &url ) const;
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signals:
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void requestStarted( tdehtml::DocLoader* dl, tdehtml::CachedObject* obj );
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void requestDone( tdehtml::DocLoader* dl, tdehtml::CachedObject *obj );
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void requestFailed( tdehtml::DocLoader* dl, tdehtml::CachedObject *obj );
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protected slots:
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void slotFinished( TDEIO::Job * );
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void slotData( TDEIO::Job *, const TQByteArray & );
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void servePendingRequests();
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protected:
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TQPtrList<Request> m_requestsPending;
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TQPtrDict<Request> m_requestsLoading;
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#ifdef HAVE_LIBJPEG
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KJPEGFormatType m_jpegloader;
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#endif
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TQTimer m_timer;
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};
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/**
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* @internal
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*
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* Provides a cache/loader for objects needed for displaying the html page.
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* At the moment these are stylesheets, scripts and images
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*/
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class Cache
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{
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friend class DocLoader;
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template<typename CachedObjectType, enum CachedObject::Type CachedType>
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static CachedObjectType* requestObject( DocLoader* dl, const KURL& kurl, const char* accept );
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public:
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/**
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* init the cache in case it's not already. This needs to get called once
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* before using it.
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*/
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KDE_EXPORT static void init();
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/**
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* Ask the cache for some url. Will return a cachedObject, and
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* load the requested data in case it's not cached
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* if the DocLoader is zero, the url must be full-qualified.
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* Otherwise, it is automatically base-url expanded
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*/
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// static CachedImage *requestImage(const KURL& url)
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// { return Cache::requestObject<CachedImage, CachedObject::Image>( 0, url, 0 ); }
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/**
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* Pre-loads a stylesheet into the cache.
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*/
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static void preloadStyleSheet(const TQString &url, const TQString &stylesheet_data);
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/**
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* Pre-loads a script into the cache.
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*/
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static void preloadScript(const TQString &url, const TQString &script_data);
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static void setSize( int bytes );
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static int size() { return maxSize; };
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static void statistics();
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KDE_EXPORT static void flush(bool force=false);
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/**
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* clears the cache
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* Warning: call this only at the end of your program, to clean
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* up memory (useful for finding memory holes)
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*/
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KDE_EXPORT static void clear();
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static Loader *loader() { return m_loader; }
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static TQPixmap *nullPixmap;
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static TQPixmap *brokenPixmap;
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static TQPixmap *blockedPixmap;
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static int cacheSize;
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static void removeCacheEntry( CachedObject *object );
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private:
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static void checkLRUAndUncacheableListIntegrity();
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friend class CachedObject;
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static TQDict<CachedObject> *cache;
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static TQPtrList<DocLoader>* docloader;
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static TQPtrList<CachedObject> *freeList;
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static void insertInLRUList(CachedObject*);
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static void removeFromLRUList(CachedObject*);
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static int totalSizeOfLRU;
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static int maxSize;
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static Loader *m_loader;
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};
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} // namespace
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#endif
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