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00019 #include "editorwatcher.h"
00020
00021 #include <config.h>
00022
00023 #include <kdebug.h>
00024 #include <klocale.h>
00025 #include <kmessagebox.h>
00026 #include <kopenwith.h>
00027 #include <kprocess.h>
00028 #include <kuserprofile.h>
00029
00030 #include <qsocketnotifier.h>
00031
00032 #include <cassert>
00033
00034
00035 #ifdef HAVE_INOTIFY
00036 #include <sys/ioctl.h>
00037 #include <unistd.h>
00038 #include <fcntl.h>
00039 #include <sys/syscall.h>
00040 #include <linux/types.h>
00041
00042 #define _S390_BITOPS_H
00043 #include <linux/inotify.h>
00044
00045 static inline int inotify_init (void)
00046 {
00047 return syscall (__NR_inotify_init);
00048 }
00049
00050 static inline int inotify_add_watch (int fd, const char *name, __u32 mask)
00051 {
00052 return syscall (__NR_inotify_add_watch, fd, name, mask);
00053 }
00054
00055 static inline int inotify_rm_watch (int fd, __u32 wd)
00056 {
00057 return syscall (__NR_inotify_rm_watch, fd, wd);
00058 }
00059 #endif
00060
00061 using namespace KMail;
00062
00063 EditorWatcher::EditorWatcher(const KURL & url, const QString &mimeType, bool openWith, QObject * parent) :
00064 QObject( parent ),
00065 mUrl( url ),
00066 mMimeType( mimeType ),
00067 mOpenWith( openWith ),
00068 mEditor( 0 ),
00069 mHaveInotify( false ),
00070 mFileOpen( false ),
00071 mEditorRunning( false ),
00072 mFileModified( true ),
00073 mDone( false )
00074 {
00075 assert( mUrl.isLocalFile() );
00076 connect( &mTimer, SIGNAL(timeout()), SLOT(checkEditDone()) );
00077 }
00078
00079 bool EditorWatcher::start()
00080 {
00081
00082 KURL::List list;
00083 list.append( mUrl );
00084 KService::Ptr offer = KServiceTypeProfile::preferredService( mMimeType, "Application" );
00085 if ( mOpenWith || !offer ) {
00086 KOpenWithDlg dlg( list, i18n("Edit with:"), QString::null, 0 );
00087 if ( !dlg.exec() )
00088 return false;
00089 offer = dlg.service();
00090 if ( !offer )
00091 return false;
00092 }
00093
00094 #ifdef HAVE_INOTIFY
00095
00096 mInotifyFd = inotify_init();
00097 if ( mInotifyFd > 0 ) {
00098 mInotifyWatch = inotify_add_watch( mInotifyFd, mUrl.path().latin1(), IN_CLOSE | IN_OPEN | IN_MODIFY );
00099 if ( mInotifyWatch >= 0 ) {
00100 QSocketNotifier *sn = new QSocketNotifier( mInotifyFd, QSocketNotifier::Read, this );
00101 connect( sn, SIGNAL(activated(int)), SLOT(inotifyEvent()) );
00102 mHaveInotify = true;
00103 mFileModified = false;
00104 }
00105 } else {
00106 kdWarning(5006) << k_funcinfo << "Failed to activate INOTIFY!" << endl;
00107 }
00108 #endif
00109
00110
00111 QStringList params = KRun::processDesktopExec( *offer, list, false );
00112 mEditor = new KProcess( this );
00113 *mEditor << params;
00114 connect( mEditor, SIGNAL(processExited(KProcess*)), SLOT(editorExited()) );
00115 if ( !mEditor->start() )
00116 return false;
00117 mEditorRunning = true;
00118
00119 mEditTime.start();
00120 return true;
00121 }
00122
00123 void EditorWatcher::inotifyEvent()
00124 {
00125 assert( mHaveInotify );
00126 #ifdef HAVE_INOTIFY
00127 int pending = -1;
00128 char buffer[4096];
00129 ioctl( mInotifyFd, FIONREAD, &pending );
00130 while ( pending > 0 ) {
00131 int size = read( mInotifyFd, buffer, QMIN( pending, (int)sizeof(buffer) ) );
00132 pending -= size;
00133 if ( size < 0 )
00134 break;
00135 int offset = 0;
00136 while ( size > 0 ) {
00137 struct inotify_event *event = (struct inotify_event *) &buffer[offset];
00138 size -= sizeof( struct inotify_event ) + event->len;
00139 offset += sizeof( struct inotify_event ) + event->len;
00140 if ( event->mask & IN_OPEN )
00141 mFileOpen = true;
00142 if ( event->mask & IN_CLOSE )
00143 mFileOpen = false;
00144 if ( event->mask & IN_MODIFY )
00145 mFileModified = true;
00146 }
00147 }
00148 #endif
00149 mTimer.start( 500, true );
00150
00151 }
00152
00153 void EditorWatcher::editorExited()
00154 {
00155 mEditorRunning = false;
00156 mTimer.start( 500, true );
00157 }
00158
00159 void EditorWatcher::checkEditDone()
00160 {
00161 if ( mEditorRunning || (mFileOpen && mHaveInotify) || mDone )
00162 return;
00163
00164
00165 mDone = true;
00166
00167
00168 if ( mEditTime.elapsed() <= 3000 ) {
00169 KMessageBox::error( 0, i18n("KMail is unable to detect when the choosen editor is closed. "
00170 "To avoid data loss, editing the attachment will be aborted."), i18n("Unable to edit attachment") );
00171 }
00172
00173 emit editDone( this );
00174 deleteLater();
00175 }
00176
00177 #include "editorwatcher.moc"