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
@@ -226,6 +226,12 @@ QString OFileNotification::path() const
 }
 
 
+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() );
@@ -331,7 +337,7 @@ void OFileNotification::unregisterEventHandler()
 // ODirNotification
 //=================================================================================================
 ODirNotification::ODirNotification( QObject* parent, const char* name )
-                  :QObject( parent, name )
+                  :QObject( parent, name ), _topfilenotification( 0 ), _type( Nothing ), _depth( -123 )
 {
     qDebug( "ODirNotification::ODirNotification()" );
 }
@@ -342,15 +348,39 @@ 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& ) ) );
@@ -366,8 +396,10 @@ int ODirNotification::watch( const QString& path, bool sshot, OFileNotificationT
         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 );
 
@@ -375,7 +407,7 @@ int ODirNotification::watch( const QString& path, bool sshot, OFileNotificationT
             {
                 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) );
@@ -383,33 +415,28 @@ int ODirNotification::watch( const QString& path, bool sshot, OFileNotificationT
                 }
             }
         }
-//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
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
@@ -111,6 +111,7 @@ class OFileNotificationEvent;
 
 enum OFileNotificationType
 {
+    Nothing         =   0,
     Access          =   IN_ACCESS,
     Modify          =   IN_MODIFY,
     Attrib          =   IN_ATTRIB,
@@ -198,6 +199,10 @@ class OFileNotification : public QObject
      **/
     QString path() const;
     /**
+     * @returns if the notification is single-shot
+     */
+    bool isSingleShot() const;
+    /**
      * @returns if a file is currently being watched.
      **/
     bool isActive() const;
@@ -292,6 +297,14 @@ class ODirNotification : public QObject
     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;
 };
 
 /*======================================================================================