more work on recursive watches

2 files changed, 66 insertions, 26 deletions

diff --git a/libopie2/opiecore/linux/ofilenotify.cpp b/libopie2/opiecore/linux/ofilenotify.cpp
index 3096f7e..a7820ee 100644
--- a/libopie2/opiecore/linux/ofilenotify.cpp
+++ b/libopie2/opiecore/linux/ofilenotify.cpp
@@ -205,48 +205,54 @@ void OFileNotification::stop()
 {
     notification_list.remove( _wd );
     _path = QString::null;
     _wd = 0;
     _active = false;
     if ( notification_list.isEmpty() )
     {
         OFileNotification::unregisterEventHandler();
     }
 }
 
 
 OFileNotificationType OFileNotification::type() const
 {
     return _type;
 }
 
 
 QString OFileNotification::path() const
 {
     return _path;
 }
 
 
+bool OFileNotification::isSingleShot() const
+{
+    return !_multi;
+}
+
+
 bool OFileNotification::activate( const OFileNotificationEvent* e )
 {
     qDebug( "OFileNotification::activate(): e = ( %s, %d, 0x%08x, %d, %s )", (const char*) _path, e->descriptor(), e->mask(), e->cookie(), (const char*) e->name() );
 
     // dumb signal
     _signal.activate();
 
     // generic signal
     emit triggered( _path, e->mask(), e->name() );
 
     // specialized signals
     switch ( e->mask() )
     {
         case Access:        emit accessed( _path );                 break;
         case Modify:        emit modified( _path );                 break;
         case Attrib:        emit attributed( _path);                break;
         case CloseWrite:    emit closed( _path, true );             break;
         case CloseNoWrite:  emit closed( _path, false );            break;
         case Open:          emit opened( _path );                   break;
         case MovedFrom:     emit movedFrom( _path, e->name() );     break;
         case MovedTo:       emit movedTo( _path, e->name() );       break;
         case DeleteSubdir:  emit deletedSubdir( _path, e->name() ); break;
         case DeleteFile:    emit deletedFile( _path, e->name() );   break;
         case CreateSubdir:  emit createdSubdir( _path, e->name() ); break;
@@ -310,108 +316,129 @@ bool OFileNotification::registerEventHandler()
         qWarning( "OFileNotification::registerEventHandler(): couldn't register event handler: %s", strerror( errno ) );
         return false;
     }
 
     OFileNotification::_sn = new QSocketNotifier( _fd, QSocketNotifier::Read, this, "inotify event" );
     connect( OFileNotification::_sn, SIGNAL( activated(int) ), this, SLOT( inotifyEventHandler() ) );
 
     qDebug( "OFileNotification::registerEventHandler(): done" );
     return true;
 }
 
 
 void OFileNotification::unregisterEventHandler()
 {
     if ( _sn ) delete _sn;
     if ( OFileNotification::_fd )
     ::close( OFileNotification::_fd );
     qDebug( "OFileNotification::unregisterEventHandler(): done" );
 }
 
 //=================================================================================================
 // ODirNotification
 //=================================================================================================
 ODirNotification::ODirNotification( QObject* parent, const char* name )
-                  :QObject( parent, name )
+                  :QObject( parent, name ), _topfilenotification( 0 ), _type( Nothing ), _depth( -123 )
 {
     qDebug( "ODirNotification::ODirNotification()" );
 }
 
 
 ODirNotification::~ODirNotification()
 {
     qDebug( "ODirNotification::~ODirNotification()" );
 }
 
+/*
+  Love-Trowbridge recursive directory scanning algorithm:
+
+        Step 1.  Start at initial directory foo.  Add watch.
+
+        Step 2.  Setup handlers for watch created in Step 1.
+                 Specifically, ensure that a directory created
+                 in foo will result in a handled CREATE_SUBDIR
+                 event.
+
+        Step 3.  Read the contents of foo.
+
+        Step 4.  For each subdirectory of foo read in step 3, repeat
+                 step 1.
+
+        Step 5.  For any CREATE_SUBDIR event on bar, if a watch is
+                 not yet created on bar, repeat step 1 on bar.
+*/
 
 int ODirNotification::watch( const QString& path, bool sshot, OFileNotificationType type, int recurse )
 {
-    qDebug( "ODirNotification::watch( %s, %d, 0x%08x, %d )", (const char*) path, sshot, type, recurse );
-
+    if ( _type == Nothing ) _type = type; // only set it once - for the top level call
+    OFileNotificationType subtype = ( recurse != 0 ) ? (OFileNotificationType) int( _type | CreateSubdir ) : _type;
+    qDebug( "ODirNotification::watch( %s, %d, 0x%08x, %d )", (const char*) path, sshot, subtype, recurse );
     OFileNotification* fn = new OFileNotification( this, "ODirNotification delegate" );
-    int result = fn->startWatching( path, sshot, type );
+
+    int result = fn->startWatching( path, sshot, subtype );
     if ( result != -1 )
     {
+
+        if ( !_topfilenotification ) _topfilenotification = fn; // only set it once - for the top level call
+        if ( _depth == -123 ) _depth = recurse; // only set it once - for the top level call
+
         connect( fn, SIGNAL( triggered( const QString&, unsigned int, const QString& ) ), this, SIGNAL( triggered( const QString&, unsigned int, const QString& ) ) );
         connect( fn, SIGNAL( accessed( const QString& ) ), this, SIGNAL( accessed( const QString& ) ) );
         connect( fn, SIGNAL( modified( const QString& ) ), this, SIGNAL( modified( const QString& ) ) );
         connect( fn, SIGNAL( attributed( const QString& ) ), this, SIGNAL( attributed( const QString& ) ) );
         connect( fn, SIGNAL( closed( const QString&, bool ) ), this, SIGNAL( closed( const QString&, bool ) ) );
         connect( fn, SIGNAL( opened( const QString& ) ), this, SIGNAL( opened( const QString& ) ) );
         connect( fn, SIGNAL( movedTo( const QString&, const QString& ) ), this, SIGNAL( movedTo( const QString&, const QString& ) ) );
         connect( fn, SIGNAL( movedFrom( const QString&, const QString& ) ), this, SIGNAL( movedFrom( const QString&, const QString& ) ) );
         connect( fn, SIGNAL( deletedSubdir( const QString&, const QString& ) ), this, SIGNAL( deletedSubdir( const QString&, const QString& ) ) );
         connect( fn, SIGNAL( deletedFile( const QString&, const QString& ) ), this, SIGNAL( deletedFile( const QString&, const QString& ) ) );;
         connect( fn, SIGNAL( createdSubdir( const QString&, const QString& ) ), this, SIGNAL( createdSubdir( const QString&, const QString& ) ) );
         connect( fn, SIGNAL( createdFile( const QString&, const QString& ) ), this, SIGNAL( createdFile( const QString&, const QString& ) ) );
         connect( fn, SIGNAL( deleted( const QString& ) ), this, SIGNAL( deleted( const QString& ) ) );
         connect( fn, SIGNAL( unmounted( const QString& ) ), this, SIGNAL( unmounted( const QString& ) ) );
 
-        if ( recurse )
+        if ( recurse != 0 )
         {
+            connect( fn, SIGNAL( createdSubdir( const QString&, const QString& ) ), this, SLOT( subdirCreated( const QString&, const QString& ) ) );
+
             QDir directory( path );
             QStringList subdirs = directory.entryList( QDir::Dirs );
 
             for ( QStringList::Iterator it = subdirs.begin(); it != subdirs.end(); ++it )
             {
                 if ( (*it) == "." || (*it) == ".." ) continue;
                 QString subpath = QString( "%1/%2" ).arg( path ).arg( *it );
-                int subresult = watch( subpath, sshot, type, recurse-1 );
+                int subresult = watch( subpath, sshot, subtype, recurse-1 );
                 if ( subresult == -1 )
                 {
                     qDebug( "ODirNotification::watch(): subresult for '%s' was -1. Interrupting", (const char*) (*it) );
                     return -1;
                 }
             }
         }
-//connect( fn, SIGNAL( triggered( const QString&, unsigned int, const QString& ) ), this, SIGNAL( triggered( const QString&, unsigned int, const QString& ) ) );
     }
     else return -1;
 }
 
 
-// void ODirNotification::subdirCreated( const QString& name )
-
-
-/*
-  Love-Trowbridge recursive directory scanning algorithm:
-
-        Step 1.  Start at initial directory foo.  Add watch.
-
-        Step 2.  Setup handlers for watch created in Step 1.
-                 Specifically, ensure that a directory created
-                 in foo will result in a handled CREATE_SUBDIR
-                 event.
-
-        Step 3.  Read the contents of foo.
+void ODirNotification::subdirCreated( const QString& dir, const QString& subdir )
+{
+    qDebug( "*** ODirNotification::subdirCreated '%s/%s'", (const char*) dir, (const char*) subdir );
+    QString newdir = dir;
+    if ( newdir.startsWith( _topfilenotification->path() ) )
+    {
+        newdir.replace( _topfilenotification->path(), "" );
+        int level = newdir.contains( '/' );
+        qDebug( "*** dirpart = '%s' ==> level = %d", (const char*) newdir, level );
 
-        Step 4.  For each subdirectory of foo read in step 3, repeat
-                 step 1.
+        if ( _depth == -1 || _depth > level )
+        {
+            watch( QString( "%1/%2" ).arg( dir ).arg( subdir ), _topfilenotification->isSingleShot(), _topfilenotification->type(), _depth == -1 ? -1 : _depth-level-1 );
+        }
 
-        Step 5.  For any CREATE_SUBDIR event on bar, if a watch is
-                 not yet created on bar, repeat step 1 on bar.
-*/
+    }
+}
 
 
 } // namespace Ui
 
 } // namespace Opie
diff --git a/libopie2/opiecore/linux/ofilenotify.h b/libopie2/opiecore/linux/ofilenotify.h
index 05343b9..17e6b5d 100644
--- a/libopie2/opiecore/linux/ofilenotify.h
+++ b/libopie2/opiecore/linux/ofilenotify.h
@@ -90,48 +90,49 @@ class OFileNotificationEvent;
  *
  * This enumerate provides a means to specify the type of events that you are interest in.
  * Valid values are:
  * <ul>
  *    <li>Access: The file was accessed (read)
  *    <li>Modify The file was modified (write,truncate)
  *    <li>Attrib = The file had its attributes changed (chmod,chown,chgrp)
  *    <li>CloseWrite = Writable file was closed
  *    <li>CloseNoWrite = Unwritable file was closed
  *    <li>Open = File was opened
  *    <li>MovedFrom = File was moved from X
  *    <li>MovedTo = File was moved to Y
  *    <li>DeleteSubdir = Subdir was deleted
  *    <li>DeleteFile = Subfile was deleted
  *    <li>CreateSubdir = Subdir was created
  *    <li>CreateFile = Subfile was created
  *    <li>DeleteSelf = Self was deleted
  *    <li>Unmount = The backing filesystem was unmounted
  * </ul>
  *
  **/
 
 enum OFileNotificationType
 {
+    Nothing         =   0,
     Access          =   IN_ACCESS,
     Modify          =   IN_MODIFY,
     Attrib          =   IN_ATTRIB,
     CloseWrite      =   IN_CLOSE_WRITE,
     CloseNoWrite    =   IN_CLOSE_NOWRITE,
     Open            =   IN_OPEN,
     MovedFrom       =   IN_MOVED_FROM,
     MovedTo         =   IN_MOVED_TO,
     DeleteSubdir    =   IN_DELETE_SUBDIR,
     DeleteFile      =   IN_DELETE_FILE,
     CreateSubdir    =   IN_CREATE_SUBDIR,
     CreateFile      =   IN_CREATE_FILE,
     DeleteSelf      =   IN_DELETE_SELF,
     Unmount         =   IN_UNMOUNT,
     _QueueOverflow  =   IN_Q_OVERFLOW,  /* Internal, don't use this in client code */
     _Ignored        =   IN_IGNORED,     /* Internal, don't use this in client code */
 };
 
 /*======================================================================================
  * OFileNotification
  *======================================================================================*/
 
 /**
  * @brief Represents a file notification
@@ -177,48 +178,52 @@ class OFileNotification : public QObject
      * This sample program automatically terminates when the file "/tmp/quit" has been accessed.
      *
      *
      * The @a receiver is the receiving object and the @a member is the slot.
      **/
     static bool singleShot( const QString& path, QObject* receiver, const char* member, OFileNotificationType type = Modify );
     /**
      * Starts to watch for @a type changes to @a path. Set @a sshot to True if you want to be notified only once.
      * Note that in that case it may be more convenient to use @ref OFileNotification::singleShot() then.
      **/
     int watch( const QString& path, bool sshot = false, OFileNotificationType type = Modify );
     /**
      * Stop watching for file events.
      **/
     void stop();
     /**
      * @returns the notification type as set by @ref start().
      **/
     OFileNotificationType type() const;
     /**
      * @returns the path to the file being watched by this instance.
      **/
     QString path() const;
     /**
+     * @returns if the notification is single-shot
+     */
+    bool isSingleShot() const;
+    /**
      * @returns if a file is currently being watched.
      **/
     bool isActive() const;
     /**
       * @internal
       */
     int startWatching( const QString& path, bool sshot = false, OFileNotificationType type = Modify );
 
   signals:
     void triggered( const QString&, unsigned int, const QString& );
     void accessed( const QString& );
     void modified( const QString& );
     void attributed( const QString& );
     void closed( const QString&, bool );
     void opened( const QString& );
     void movedTo( const QString&, const QString& );
     void movedFrom( const QString&, const QString& );
     void deletedSubdir( const QString&, const QString& );
     void deletedFile( const QString&, const QString& );
     void createdSubdir( const QString&, const QString& );
     void createdFile( const QString&, const QString& );
     void deleted( const QString& );
     void unmounted( const QString& );
 
@@ -271,48 +276,56 @@ class ODirNotification : public QObject
      * Starts to watch for @a type changes to @a path. Recurse @a recurse levels down the filesystem tree,
      * use 0 for no recursion and -1 for unlimited recursion.
      * Set @a sshot to True if you want to be notified only once.
      **/
     int watch( const QString& path, bool sshot = false, OFileNotificationType type = Modify, int recurse = 0 );
 
   signals:
     /**
      * This signal is emitted if an event happens of the specified type happens to the directory being watched.
      **/
     void triggered( const QString&, unsigned int, const QString& );
     void accessed( const QString& );
     void modified( const QString& );
     void attributed( const QString& );
     void closed( const QString&, bool );
     void opened( const QString& );
     void movedTo( const QString&, const QString& );
     void movedFrom( const QString&, const QString& );
     void deletedSubdir( const QString&, const QString& );
     void deletedFile( const QString&, const QString& );
     void createdSubdir( const QString&, const QString& );
     void createdFile( const QString&, const QString& );
     void deleted( const QString& );
     void unmounted( const QString& );
+
+  private slots:
+    void subdirCreated( const QString&, const QString& );
+
+  private:
+    OFileNotification* _topfilenotification;
+    OFileNotificationType _type;
+    int _depth;
 };
 
 /*======================================================================================
  * OFileNotificationEvent
  *======================================================================================*/
 
 class OFileNotificationEvent
 {
   public:
     OFileNotificationEvent( OFileNotification* parent, int wd, unsigned int mask, unsigned int cookie, const QString& name );
     ~OFileNotificationEvent();
     OFileNotification* parent() const { return _parent; };
     int descriptor() const            { return _wd; };
     unsigned int mask() const         { return _mask; };
     unsigned int cookie() const       { return _cookie; };
     QString name() const              { return _name; };
     void activate()                   { _parent->activate( this ); };
 
   private:
     OFileNotification* _parent;
     int _wd;
     unsigned int _mask;
     unsigned int _cookie;
     QString _name;