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metainfojob.cpp
1/* This file is part of the KDE libraries
2 Copyright (C) 2002 Rolf Magnus <ramagnus@kde.org>
3
4 This library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Library General Public
6 License as published by the Free Software Foundation version 2.0.
7
8 This library is distributed in the hope that it will be useful,
9 but WITHOUT ANY WARRANTY; without even the implied warranty of
10 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 Library General Public License for more details.
12
13 You should have received a copy of the GNU Library General Public License
14 along with this library; see the file COPYING.LIB. If not, write to
15 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
16 Boston, MA 02110-1301, USA.
17
18 $Id$
19*/
20
21#include <kdatastream.h> // Do not remove, needed for correct bool serialization
22#include <tdefileitem.h>
23#include <kdebug.h>
24#include <tdefilemetainfo.h>
25#include <tdeio/kservice.h>
26#include <tdeparts/componentfactory.h>
27
28#include <tqtimer.h>
29
30#include "metainfojob.moc"
31
32using namespace TDEIO;
33
34struct TDEIO::MetaInfoJobPrivate
35{
36 KFileItemList items; // all the items we got
37 KFileItemListIterator* currentItem; // argh! No default constructor
38 bool deleteItems; // Delete the KFileItems when done?
39 bool succeeded; // if the current item is ok
40};
41
42MetaInfoJob::MetaInfoJob(const KFileItemList &items, bool deleteItems)
43 : TDEIO::Job(false /* no GUI */)
44{
45 d = new MetaInfoJobPrivate;
46 d->deleteItems = deleteItems;
47 d->succeeded = false;
48 d->items = items;
49 d->currentItem = new KFileItemListIterator(d->items);
50
51 d->items.setAutoDelete(deleteItems);
52
53 if (d->currentItem->isEmpty())
54 {
55 kdDebug(7007) << "nothing to do for the MetaInfoJob\n";
56 emitResult();
57 return;
58 }
59
60 kdDebug(7007) << "starting MetaInfoJob\n";
61
62 // Return to event loop first, determineNextFile() might delete this;
63 // (no idea what that means, it comes from previewjob)
64 TQTimer::singleShot(0, this, TQ_SLOT(start()));
65}
66
67MetaInfoJob::~MetaInfoJob()
68{
69 delete d->currentItem;
70 delete d;
71}
72
73void MetaInfoJob::start()
74{
75 getMetaInfo();
76}
77
78void MetaInfoJob::removeItem(const KFileItem* item)
79{
80 if (d->currentItem->current() == item)
81 {
82 subjobs.first()->kill();
83 subjobs.removeFirst();
84 determineNextFile();
85 }
86
87 d->items.remove(d->items.find(item));
88}
89
90void MetaInfoJob::determineNextFile()
91{
92 if (d->currentItem->atLast())
93 {
94 kdDebug(7007) << "finished MetaInfoJob\n";
95 emitResult();
96 return;
97 }
98
99 ++(*d->currentItem);
100 d->succeeded = false;
101
102 // does the file item already have the needed info? Then shortcut
103 if (d->currentItem->current()->metaInfo(false).isValid())
104 {
105// kdDebug(7007) << "Is already valid *************************\n";
106 emit gotMetaInfo(d->currentItem->current());
107 determineNextFile();
108 return;
109 }
110
111 getMetaInfo();
112}
113
114void MetaInfoJob::slotResult( TDEIO::Job *job )
115{
116 subjobs.remove(job);
117 Q_ASSERT(subjobs.isEmpty()); // We should have only one job at a time ...
118
119 determineNextFile();
120}
121
122void MetaInfoJob::getMetaInfo()
123{
124 Q_ASSERT(!d->currentItem->isEmpty());
125
126 KURL URL;
127 URL.setProtocol("metainfo");
128 URL.setPath(d->currentItem->current()->url().path());
129
130 TDEIO::TransferJob* job = TDEIO::get(URL, false, false);
131 addSubjob(job);
132
133 connect(job, TQ_SIGNAL(data(TDEIO::Job *, const TQByteArray &)),
134 this, TQ_SLOT(slotMetaInfo(TDEIO::Job *, const TQByteArray &)));
135
136 job->addMetaData("mimeType", d->currentItem->current()->mimetype());
137}
138
139
140void MetaInfoJob::slotMetaInfo(TDEIO::Job*, const TQByteArray &data)
141{
142 KFileMetaInfo info;
143 TQDataStream s(data, IO_ReadOnly);
144
145 s >> info;
146
147 d->currentItem->current()->setMetaInfo(info);
148 emit gotMetaInfo(d->currentItem->current());
149 d->succeeded = true;
150}
151
152TQStringList MetaInfoJob::availablePlugins()
153{
154 TQStringList result;
155 TDETrader::OfferList plugins = TDETrader::self()->query("KFilePlugin");
156 for (TDETrader::OfferList::ConstIterator it = plugins.begin(); it != plugins.end(); ++it)
157 result.append((*it)->desktopEntryName());
158 return result;
159}
160
161TQStringList MetaInfoJob::supportedMimeTypes()
162{
163 TQStringList result;
164 TDETrader::OfferList plugins = TDETrader::self()->query("KFilePlugin");
165 for (TDETrader::OfferList::ConstIterator it = plugins.begin(); it != plugins.end(); ++it)
166 result += (*it)->property("MimeTypes").toStringList();
167 return result;
168}
169
170TDEIO_EXPORT MetaInfoJob *TDEIO::fileMetaInfo( const KFileItemList &items)
171{
172 return new MetaInfoJob(items, false);
173}
174
175TDEIO_EXPORT MetaInfoJob *TDEIO::fileMetaInfo( const KURL::List &items)
176{
177 KFileItemList fileItems;
178 for (KURL::List::ConstIterator it = items.begin(); it != items.end(); ++it)
179 fileItems.append(new KFileItem(KFileItem::Unknown, KFileItem::Unknown, *it, true));
180 return new MetaInfoJob(fileItems, true);
181}
182
KFileItem
A KFileItem is a generic class to handle a file, local or remote.
Definition tdefileitem.h:42
KFileMetaInfo
Meta Information about a file.
Definition tdefilemetainfo.h:927
TDEIO::Job
The base class for all jobs.
Definition jobclasses.h:67
TDEIO::Job::emitResult
void emitResult()
Utility function to emit the result signal, and suicide this job.
Definition job.cpp:249
TDEIO::Job::addSubjob
virtual void addSubjob(Job *job, bool inheritMetaData=true)
Definition job.cpp:183
TDEIO::Job::result
void result(TDEIO::Job *job)
TDEIO::Job::addMetaData
void addMetaData(const TQString &key, const TQString &value)
Definition job.cpp:434
TDEIO::MetaInfoJob
MetaInfoJob is a TDEIO Job to retrieve meta information from files.
Definition metainfojob.h:34
TDEIO::MetaInfoJob::supportedMimeTypes
static TQStringList supportedMimeTypes()
Definition metainfojob.cpp:161
TDEIO::MetaInfoJob::MetaInfoJob
MetaInfoJob(const KFileItemList &items, bool deleteItems=false)
Creates a new MetaInfoJob.
Definition metainfojob.cpp:42
TDEIO::MetaInfoJob::removeItem
void removeItem(const KFileItem *item)
Removes an item from metainfo extraction.
Definition metainfojob.cpp:78
TDEIO::MetaInfoJob::gotMetaInfo
void gotMetaInfo(const KFileItem *item)
TDEIO::MetaInfoJob::availablePlugins
static TQStringList availablePlugins()
Definition metainfojob.cpp:152
TDEIO::TransferJob
The transfer job pumps data into and/or out of a Slave.
Definition jobclasses.h:874
TDETrader::query
virtual OfferList query(const TQString &servicetype, const TQString &constraint=TQString::null, const TQString &preferences=TQString::null) const
The main function in the TDETrader class.
Definition ktrader.cpp:106
TDETrader::self
static TDETrader * self()
This is a static pointer to a TDETrader instance.
Definition ktrader.cpp:90
TDETrader::OfferList
TQValueList< KService::Ptr > OfferList
A list of services.
Definition ktrader.h:92
TDEIO
A namespace for TDEIO globals.
Definition authinfo.h:29
TDEIO::get
TDEIO_EXPORT TransferJob * get(const KURL &url, bool reload=false, bool showProgressInfo=true)
Get (a.k.a.
Definition job.cpp:1284
TDEIO::fileMetaInfo
TDEIO_EXPORT MetaInfoJob * fileMetaInfo(const KFileItemList &items)
Retrieves meta information for the given items.
Definition metainfojob.cpp:170

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