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173 lines
4.9 KiB
173 lines
4.9 KiB
/*
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Copyright (c) 2007 Volker Krause <vkrause@kde.org>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program 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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include "editorwatcher.h"
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#include <config.h>
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#include <kdebug.h>
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#include <tdelocale.h>
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#include <tdemessagebox.h>
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#include <kopenwith.h>
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#include <kprocess.h>
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#include <kuserprofile.h>
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#include <tqsocketnotifier.h>
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#include <cassert>
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// inotify stuff taken from tdelibs/tdeio/tdeio/kdirwatch.cpp
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#ifdef HAVE_SYS_INOTIFY
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#include <sys/ioctl.h>
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#include <sys/inotify.h>
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#include <fcntl.h>
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#elif HAVE_INOTIFY
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#include <sys/ioctl.h>
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#include <unistd.h>
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#include <sys/inotify.h>
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#include <sys/syscall.h>
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#include <linux/types.h>
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// Linux kernel headers are documented to not compile
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#define _S390_BITOPS_H
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#endif
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using namespace KMail;
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EditorWatcher::EditorWatcher(const KURL & url, const TQString &mimeType, bool openWith,
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TQObject * parent, TQWidget *parentWidget) :
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TQObject( parent ),
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mUrl( url ),
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mMimeType( mimeType ),
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mOpenWith( openWith ),
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mEditor( 0 ),
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mParentWidget( parentWidget ),
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mHaveInotify( false ),
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mFileOpen( false ),
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mEditorRunning( false ),
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mFileModified( true ), // assume the worst unless we know better
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mDone( false )
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{
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assert( mUrl.isLocalFile() );
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connect( &mTimer, TQT_SIGNAL(timeout()), TQT_SLOT(checkEditDone()) );
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}
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bool EditorWatcher::start()
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{
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// find an editor
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KURL::List list;
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list.append( mUrl );
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KService::Ptr offer = KServiceTypeProfile::preferredService( mMimeType, "Application" );
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if ( mOpenWith || !offer ) {
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KOpenWithDlg dlg( list, i18n("Edit with:"), TQString(), 0 );
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if ( !dlg.exec() )
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return false;
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offer = dlg.service();
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if ( !offer )
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return false;
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}
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#ifdef HAVE_INOTIFY
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// monitor file
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mInotifyFd = inotify_init();
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if ( mInotifyFd > 0 ) {
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mInotifyWatch = inotify_add_watch( mInotifyFd, mUrl.path().latin1(), IN_CLOSE | IN_OPEN | IN_MODIFY );
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if ( mInotifyWatch >= 0 ) {
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TQSocketNotifier *sn = new TQSocketNotifier( mInotifyFd, TQSocketNotifier::Read, this );
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connect( sn, TQT_SIGNAL(activated(int)), TQT_SLOT(inotifyEvent()) );
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mHaveInotify = true;
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mFileModified = false;
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}
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} else {
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kdWarning(5006) << k_funcinfo << "Failed to activate INOTIFY!" << endl;
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}
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#endif
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// start the editor
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TQStringList params = KRun::processDesktopExec( *offer, list, false );
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mEditor = new TDEProcess( this );
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*mEditor << params;
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connect( mEditor, TQT_SIGNAL(processExited(TDEProcess*)), TQT_SLOT(editorExited()) );
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if ( !mEditor->start() )
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return false;
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mEditorRunning = true;
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mEditTime.start();
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return true;
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}
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void EditorWatcher::inotifyEvent()
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{
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assert( mHaveInotify );
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#ifdef HAVE_INOTIFY
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int pending = -1;
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char buffer[4096];
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ioctl( mInotifyFd, FIONREAD, &pending );
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while ( pending > 0 ) {
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int size = read( mInotifyFd, buffer, TQMIN( pending, (int)sizeof(buffer) ) );
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pending -= size;
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if ( size < 0 )
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break; // error
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int offset = 0;
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while ( size > 0 ) {
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struct inotify_event *event = (struct inotify_event *) &buffer[offset];
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size -= sizeof( struct inotify_event ) + event->len;
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offset += sizeof( struct inotify_event ) + event->len;
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if ( event->mask & IN_OPEN )
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mFileOpen = true;
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if ( event->mask & IN_CLOSE )
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mFileOpen = false;
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if ( event->mask & IN_MODIFY )
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mFileModified = true;
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}
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}
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#endif
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mTimer.start( 500, true );
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}
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void EditorWatcher::editorExited()
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{
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mEditorRunning = false;
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mTimer.start( 500, true );
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}
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void EditorWatcher::checkEditDone()
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{
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if ( mEditorRunning || (mFileOpen && mHaveInotify) || mDone )
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return;
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// protect us against double-deletion by calling this method again while
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// the subeventloop of the message box is running
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mDone = true;
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// nobody can edit that fast, we seem to be unable to detect
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// when the editor will be closed
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if ( mEditTime.elapsed() <= 3000 ) {
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KMessageBox::information(
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mParentWidget,
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i18n( "KMail is unable to detect when the chosen editor is closed. "
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"To avoid data loss, editing the attachment will be aborted." ),
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i18n( "Unable to edit attachment" ),
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"UnableToEditAttachment" );
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}
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emit editDone( this );
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deleteLater();
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}
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#include "editorwatcher.moc"
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