macosx: Add button to clear the messages panel

modules/gui/macosx/DebugMessageVisualizer.h

@@ -27,6 +27,7 @@
 
 @interface VLCDebugMessageVisualizer : NSWindowController
 {
+    IBOutlet NSButton *_clearButton;
     IBOutlet NSButton * _msgs_save_btn;
     IBOutlet NSButton * _msgs_refresh_btn;
     IBOutlet id _msgs_table;
@@ -36,5 +37,6 @@
 
 - (IBAction)updateMessagesPanel:(id)sender;
 - (IBAction)saveDebugLog:(id)sender;
+- (IBAction)clearLog:(id)sender;
 
 @end

modules/gui/macosx/DebugMessageVisualizer.m

@@ -107,6 +107,7 @@ static void MsgCallback(void *data, int type, const vlc_log_t *item, const char
     [self.window setDelegate: self];
     [self.window setTitle: _NS("Messages")];
     [_msgs_save_btn setTitle: _NS("Save this Log...")];
+    [_clearButton setTitle:_NS("Clear")];
     [_msgs_refresh_btn setImage: [NSImage imageNamed: NSImageNameRefreshTemplate]];
 }
 
@@ -161,6 +162,17 @@ static void MsgCallback(void *data, int type, const vlc_log_t *item, const char
     }];
 }
 
+- (IBAction)clearLog:(id)sender
+{
+    [_msg_arr removeAllObjects];
+
+    // Reregister handler, to write new header to log
+    vlc_LogSet(VLCIntf->p_libvlc, NULL, NULL);
+    vlc_LogSet(VLCIntf->p_libvlc, MsgCallback, (__bridge void*)self);
+
+    [_msgs_table reloadData];
+}
+
 #pragma mark - data handling
 
 - (NSInteger)numberOfRowsInTableView:(NSTableView *)aTableView