macosx: fixed NSRangeException when triggering modifier keys without...

macosx: fixed NSRangeException when triggering modifier keys without characters as enabled by some international keyboards (close #7268)
(cherry picked from commit c97faddc527a0455c93419982b23763a3d6485d8)

Conflicts:
	modules/gui/macosx/MainWindow.m
	modules/gui/macosx/intf.m

modules/gui/macosx/MainWindow.m

@@ -113,11 +113,15 @@ static VLCMainWindow *_o_sharedInstance = nil;
 
     unsigned int i_keyModifiers = [[VLCMain sharedInstance] VLCModifiersToCocoa:o_key];
 
-    return [[[o_event charactersIgnoringModifiers] lowercaseString] isEqualToString: [[VLCMain sharedInstance] VLCKeyToString: o_key]] && 
+    NSString * characters = [o_event charactersIgnoringModifiers];
+    if ([characters length] > 0) {
+        return [[characters lowercaseString] isEqualToString: [[VLCMain sharedInstance] VLCKeyToString: o_key]] &&
                 (i_keyModifiers & NSShiftKeyMask)     == ([o_event modifierFlags] & NSShiftKeyMask) &&
                 (i_keyModifiers & NSControlKeyMask)   == ([o_event modifierFlags] & NSControlKeyMask) &&
                 (i_keyModifiers & NSAlternateKeyMask) == ([o_event modifierFlags] & NSAlternateKeyMask) &&
                 (i_keyModifiers & NSCommandKeyMask)   == ([o_event modifierFlags] & NSCommandKeyMask);
+    }
+    return NO;
 }
 
 - (BOOL)performKeyEquivalent:(NSEvent *)o_event

modules/gui/macosx/VideoView.m

@@ -140,7 +140,10 @@ int DeviceCallback( vlc_object_t *p_this, const char *psz_variable,
     if( i_pressed_modifiers & NSCommandKeyMask )
         val.i_int |= KEY_MODIFIER_COMMAND;
 
-    key = [[[o_event charactersIgnoringModifiers] lowercaseString] characterAtIndex: 0];
+    NSString * characters = [o_event charactersIgnoringModifiers];
+    if ([characters length] > 0)
+    {
+        key = [[characters lowercaseString] characterAtIndex: 0];
 
         if( key )
         {
@@ -149,7 +152,7 @@ int DeviceCallback( vlc_object_t *p_this, const char *psz_variable,
             if( key == (unichar) 0x1b )
             {
                 playlist_t * p_playlist = pl_Get( VLCIntf );
-            if( var_GetBool( p_playlist, "fullscreen" ) )
+                 if( var_GetBool( p_playlist, "fullscreen") )
                      [[VLCCoreInteraction sharedInstance] toggleFullscreen];
             }
             /* handle Lion's default key combo for fullscreen-toggle in addition to our own hotkeys */
@@ -172,8 +175,10 @@ int DeviceCallback( vlc_object_t *p_this, const char *psz_variable,
 
             if (p_vout)
                 vlc_object_release( p_vout );
+
+            return;
+        }
     }
-    else
     [super keyDown: o_event];
 }
 

modules/gui/macosx/controls.m

@@ -345,7 +345,10 @@
 - (BOOL)keyEvent:(NSEvent *)o_event
 {
     BOOL eventHandled = NO;
-    unichar key = [[o_event charactersIgnoringModifiers] characterAtIndex: 0];
+    NSString * characters = [o_event charactersIgnoringModifiers];
+    if ([characters length] > 0)
+    {
+        unichar key = [characters characterAtIndex: 0];
 
         if( key )
         {
@@ -375,6 +378,7 @@
                 vlc_object_release( p_input );
             }
         }
+    }
     return eventHandled;
 }
 

modules/gui/macosx/intf.m

@@ -1340,7 +1340,10 @@ unsigned int CocoaKeyToVLC( unichar i_key )
         val.i_int |= KEY_MODIFIER_COMMAND;
     }
 
-    key = [[[o_event charactersIgnoringModifiers] lowercaseString] characterAtIndex: 0];
+    NSString * characters = [o_event charactersIgnoringModifiers];
+    if ([characters length] > 0)
+    {
+        key = [[characters lowercaseString] characterAtIndex: 0];
 
         /* handle Lion's default key combo for fullscreen-toggle in addition to our own hotkeys */
         if( key == 'f' && i_pressed_modifiers & NSControlKeyMask && i_pressed_modifiers & NSCommandKeyMask )
@@ -1381,7 +1384,7 @@ unsigned int CocoaKeyToVLC( unichar i_key )
             NSString *str = [o_usedHotkeys objectAtIndex: i];
             unsigned int i_keyModifiers = [self VLCModifiersToCocoa: str];
 
-        if( [[[o_event charactersIgnoringModifiers] lowercaseString] isEqualToString: [self VLCKeyToString: str]] &&
+            if( [[characters lowercaseString] isEqualToString: [self VLCKeyToString: str]] &&
                (i_keyModifiers & NSShiftKeyMask)     == (i_pressed_modifiers & NSShiftKeyMask) &&
                (i_keyModifiers & NSControlKeyMask)   == (i_pressed_modifiers & NSControlKeyMask) &&
                (i_keyModifiers & NSAlternateKeyMask) == (i_pressed_modifiers & NSAlternateKeyMask) &&
@@ -1397,6 +1400,7 @@ unsigned int CocoaKeyToVLC( unichar i_key )
             var_SetInteger( p_intf->p_libvlc, "key-pressed", val.i_int );
             return YES;
         }
+    }
 
     return NO;
 }