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kmail editorwatcher.cpp Go to the documentation of this file. /* Copyright (c) 2007 Volker Krause <vkrause@kde.org> This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program 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 General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ #include "editorwatcher.h" #include <config.h> #include <kdebug.h> #include <klocale.h> #include <kmessagebox.h> #include <kopenwith.h> #include <kprocess.h> #include <kuserprofile.h> #include <qsocketnotifier.h> #include <cassert> // inotify stuff taken from kdelibs/kio/kio/kdirwatch.cpp #ifdef HAVE_SYS_INOTIFY #include <sys/ioctl.h> #include <sys/inotify.h> #include <fcntl.h> #elif HAVE_INOTIFY #include <sys/ioctl.h> #include <unistd.h> #include <fcntl.h> #include <sys/syscall.h> #include <linux/types.h> // Linux kernel headers are documented to not compile #define _S390_BITOPS_H #include <linux/inotify.h> static inline int inotify_init (void) { return syscall (__NR_inotify_init); } static inline int inotify_add_watch (int fd, const char *name, __u32 mask) { return syscall (__NR_inotify_add_watch, fd, name, mask); } static inline int inotify_rm_watch (int fd, __u32 wd) { return syscall (__NR_inotify_rm_watch, fd, wd); } #endif using namespace KMail; EditorWatcher::EditorWatcher(const KURL & url, const QString &mimeType, bool openWith, QObject * parent) : QObject( parent ), mUrl( url ), mMimeType( mimeType ), mOpenWith( openWith ), mEditor( 0 ), mHaveInotify( false ), mFileOpen( false ), mEditorRunning( false ), mFileModified( true ), // assume the worst unless we know better mDone( false ) { assert( mUrl.isLocalFile() ); connect( &mTimer, SIGNAL(timeout()), SLOT(checkEditDone()) ); } bool EditorWatcher::start() { // find an editor KURL::List list; list.append( mUrl ); KService::Ptr offer = KServiceTypeProfile::preferredService( mMimeType, "Application" ); if ( mOpenWith || !offer ) { KOpenWithDlg dlg( list, i18n("Edit with:"), QString::null, 0 ); if ( !dlg.exec() ) return false; offer = dlg.service(); if ( !offer ) return false; } #ifdef HAVE_INOTIFY // monitor file mInotifyFd = inotify_init(); if ( mInotifyFd > 0 ) { mInotifyWatch = inotify_add_watch( mInotifyFd, mUrl.path().latin1(), IN_CLOSE | IN_OPEN | IN_MODIFY ); if ( mInotifyWatch >= 0 ) { QSocketNotifier *sn = new QSocketNotifier( mInotifyFd, QSocketNotifier::Read, this ); connect( sn, SIGNAL(activated(int)), SLOT(inotifyEvent()) ); mHaveInotify = true; mFileModified = false; } } else { kdWarning(5006) << k_funcinfo << "Failed to activate INOTIFY!" << endl; } #endif // start the editor QStringList params = KRun::processDesktopExec( *offer, list, false ); mEditor = new KProcess( this ); *mEditor << params; connect( mEditor, SIGNAL(processExited(KProcess*)), SLOT(editorExited()) ); if ( !mEditor->start() ) return false; mEditorRunning = true; mEditTime.start(); return true; } void EditorWatcher::inotifyEvent() { assert( mHaveInotify ); #ifdef HAVE_INOTIFY int pending = -1; char buffer[4096]; ioctl( mInotifyFd, FIONREAD, &pending ); while ( pending > 0 ) { int size = read( mInotifyFd, buffer, QMIN( pending, (int)sizeof(buffer) ) ); pending -= size; if ( size < 0 ) break; // error int offset = 0; while ( size > 0 ) { struct inotify_event *event = (struct inotify_event *) &buffer[offset]; size -= sizeof( struct inotify_event ) + event->len; offset += sizeof( struct inotify_event ) + event->len; if ( event->mask & IN_OPEN ) mFileOpen = true; if ( event->mask & IN_CLOSE ) mFileOpen = false; if ( event->mask & IN_MODIFY ) mFileModified = true; } } #endif mTimer.start( 500, true ); } void EditorWatcher::editorExited() { mEditorRunning = false; mTimer.start( 500, true ); } void EditorWatcher::checkEditDone() { if ( mEditorRunning || (mFileOpen && mHaveInotify) || mDone ) return; // protect us against double-deletion by calling this method again while // the subeventloop of the message box is running mDone = true; // nobody can edit that fast, we seem to be unable to detect // when the editor will be closed if ( mEditTime.elapsed() <= 3000 ) { KMessageBox::error( 0, i18n("KMail is unable to detect when the choosen editor is closed. " "To avoid data loss, editing the attachment will be aborted."), i18n("Unable to edit attachment") ); } emit editDone( this ); deleteLater(); } #include "editorwatcher.moc" kmail Skip menu "kmail" Main Page Namespace List Class Hierarchy Alphabetical List Class List File List Namespace Members Class Members Related Pages API Reference Skip menu "API Reference"   doc kioslaves kmail konsolekalendar kpilot libemailfunctions libkcal Generated for API Reference by doxygen 1.5.9 This website is maintained by Adriaan de Groot and Allen Winter. KDE® and the K Desktop Environment® logo are registered trademarks of KDE e.V. | Legal