]> git.sesse.net Git - vlc/blobdiff - modules/gui/macosx_dialog_provider/dialogProvider.m
macosx dialog provider: use default system font for the scripted dialogs
[vlc] / modules / gui / macosx_dialog_provider / dialogProvider.m
index fccec6e629bfb8d832e2ae70171f2f5ba6121845..0cee15ae6eac7f66907eb2e31db834b6cf54eb38 100644 (file)
@@ -35,6 +35,7 @@
 #import <vlc_plugin.h>
 #import <vlc_dialog.h>
 #import <vlc_interface.h>
+#import <vlc_extensions.h>
 
 #import <Cocoa/Cocoa.h>
 #import "VLCLoginPanel.h"
@@ -52,33 +53,482 @@ static int DisplayCritical(vlc_object_t *,const char *,vlc_value_t,vlc_value_t,v
 static int DisplayQuestion(vlc_object_t *,const char *,vlc_value_t,vlc_value_t,void * );
 static int DisplayLogin(vlc_object_t *,const char *,vlc_value_t,vlc_value_t,void * );
 static int DisplayProgressPanelAction(vlc_object_t *,const char *,vlc_value_t,vlc_value_t,void * );
+static int DisplayExtension(vlc_object_t *,const char *,vlc_value_t,vlc_value_t,void * );
 
 static void updateProgressPanel (void *, const char *, float);
 static bool checkProgressPanel (void *);
 static void destroyProgressPanel (void *);
 
+@interface VLCDialogDisplayer : NSObject
+{
+    VLCProgressPanel *_currentProgressBarPanel;
+}
+
++ (NSDictionary *)dictionaryForDialog:(const char *)title :(const char *)message :(const char *)yes :(const char *)no :(const char *)cancel;
+
+- (void)displayError:(NSDictionary *)dialog;
+- (void)displayCritical:(NSDictionary *)dialog;
+- (NSNumber *)displayQuestion:(NSDictionary *)dialog;
+- (NSDictionary *)displayLogin:(NSDictionary *)dialog;
+
+- (void)displayProgressBar:(NSDictionary *)dict;
+- (void)updateProgressPanel:(NSDictionary *)dict;
+- (void)destroyProgressPanel;
+- (NSNumber *)checkProgressPanel;
+
+- (void)updateExtensionDialog:(NSValue *)extensionDialog;
+
+- (id)resultFromSelectorOnMainThread:(SEL)sel withObject:(id)object;
+@end
+
+@interface VLCDialogButton : NSButton
+{
+    extension_widget_t *widget;
+}
+@property (readwrite) extension_widget_t *widget;
+@end
+
+@implementation VLCDialogButton
+@synthesize widget;
+@end
+
+@interface VLCDialogPopUpButton : NSPopUpButton
+{
+    extension_widget_t *widget;
+}
+@property (readwrite) extension_widget_t *widget;
+@end
+
+@implementation VLCDialogPopUpButton
+@synthesize widget;
+@end
+
+
+@interface VLCDialogTextField : NSTextField
+{
+    extension_widget_t *widget;
+}
+@property (readwrite) extension_widget_t *widget;
+@end
+
+@implementation VLCDialogTextField
+@synthesize widget;
+@end
+
+@interface VLCDialogWindow : NSWindow
+{
+    extension_dialog_t *dialog;
+}
+@property (readwrite) extension_dialog_t *dialog;
+@end
+
+@implementation VLCDialogWindow
+@synthesize dialog;
+@end
+
+
+@interface VLCDialogList : NSTableView
+{
+    extension_widget_t *widget;
+    NSMutableArray *contentArray;
+}
+@property (readwrite) extension_widget_t *widget;
+@property (readwrite, retain) NSMutableArray *contentArray;
+@end
+
+@implementation VLCDialogList
+@synthesize widget;
+@synthesize contentArray;
+
+- (NSInteger)numberOfRowsInTableView:(NSTableView *)aTableView
+{
+    return [contentArray count];
+}
+
+- (id)tableView:(NSTableView *)aTableView objectValueForTableColumn:(NSTableColumn *)aTableColumn row:(NSInteger)rowIndex
+{
+    return [[contentArray objectAtIndex:rowIndex] objectForKey:@"text"];
+}
+@end
+
+@interface VLCDialogGridView : NSView {
+    NSUInteger _rowCount, _colCount;
+    NSMutableArray *_gridedViews;
+}
+
+- (NSSize)flexSize:(NSSize)size;
+- (void)removeSubview:(NSView *)view;
+@end
+
+
+// Move this to separate file
+@implementation VLCDialogGridView
+
+- (void)dealloc
+{
+    [_gridedViews release];
+    [super dealloc];
+}
+
+- (void)recomputeCount
+{
+    _colCount = 0;
+    _rowCount = 0;
+    for (NSDictionary *obj in _gridedViews)
+    {
+        NSUInteger row = [[obj objectForKey:@"row"] intValue];
+        NSUInteger col = [[obj objectForKey:@"col"] intValue];
+        if (col + 1 > _colCount)
+            _colCount = col + 1;
+        if (row + 1 > _rowCount)
+            _rowCount = row + 1;
+    }
+}
+
+- (void)recomputeWindowSize
+{
+    [NSObject cancelPreviousPerformRequestsWithTarget:self selector:@selector(recomputeWindowSize) object:nil];
+
+    NSWindow *window = [self window];
+    NSRect frame = [window frame];
+    NSRect contentRect = [window contentRectForFrameRect:frame];
+    contentRect.size = [self flexSize:frame.size];
+    NSRect newFrame = [window frameRectForContentRect:contentRect];
+    newFrame.origin.y -= newFrame.size.height - frame.size.height;
+    newFrame.origin.x -= (newFrame.size.width - frame.size.width) / 2;
+    [window setFrame:newFrame display:YES animate:YES];
+}
+
+- (NSSize)objectSizeToFit:(NSView *)view
+{
+    if ([view isKindOfClass:[NSControl class]]) {
+        NSControl *control = (NSControl *)view;
+        return [[control cell] cellSize];
+    }
+    return [view frame].size;
+}
+
+- (CGFloat)marginX
+{
+    return 16;
+}
+- (CGFloat)marginY
+{
+    return 8;
+}
+
+- (CGFloat)constrainedHeightOfRow:(NSUInteger)targetRow
+{
+    CGFloat height = 0;
+    for(NSDictionary *obj in _gridedViews) {
+        NSUInteger row = [[obj objectForKey:@"row"] intValue];
+        if (row != targetRow)
+            continue;
+        NSUInteger rowSpan = [[obj objectForKey:@"rowSpan"] intValue];
+        if (rowSpan != 1)
+            continue;
+        NSView *view = [obj objectForKey:@"view"];
+        if ([view autoresizingMask] & NSViewHeightSizable)
+            continue;
+        NSSize sizeToFit = [self objectSizeToFit:view];
+        if (height < sizeToFit.height)
+            height = sizeToFit.height;
+    }
+    return height;
+}
+
+- (CGFloat)remainingRowsHeight
+{
+    NSUInteger height = [self marginY];
+    if (!_rowCount)
+        return 0;
+    NSUInteger autosizedRows = 0;
+    for (NSUInteger i = 0; i < _rowCount; i++) {
+        CGFloat constrainedHeight = [self constrainedHeightOfRow:i];
+        if (!constrainedHeight)
+            autosizedRows++;
+        height += constrainedHeight + [self marginY];
+    }
+    CGFloat remaining = 0;
+    if (height < self.bounds.size.height && autosizedRows)
+        remaining = (self.bounds.size.height - height) / autosizedRows;
+    if (remaining < 0)
+        remaining = 0;
+
+    return remaining;
+}
+
+- (CGFloat)heightOfRow:(NSUInteger)targetRow
+{
+    NSAssert(targetRow < _rowCount, @"accessing a non existing row");
+    CGFloat height = [self constrainedHeightOfRow:targetRow];
+    if (!height)
+        height = [self remainingRowsHeight];
+    return height;
+}
+
+
+- (CGFloat)topOfRow:(NSUInteger)targetRow
+{
+    CGFloat top = [self marginY];
+    for (NSUInteger i = 1; i < _rowCount - targetRow; i++)
+    {
+        top += [self heightOfRow:_rowCount - i] + [self marginY];
+    }
+    return top;
+}
+
+- (CGFloat)constrainedWidthOfColumn:(NSUInteger)targetColumn
+{
+    CGFloat width = 0;
+    for(NSDictionary *obj in _gridedViews) {
+        NSUInteger col = [[obj objectForKey:@"col"] intValue];
+        if (col != targetColumn)
+            continue;
+        NSUInteger colSpan = [[obj objectForKey:@"colSpan"] intValue];
+        if (colSpan != 1)
+            continue;
+        NSView *view = [obj objectForKey:@"view"];
+        if ([view autoresizingMask] & NSViewWidthSizable)
+            return 0;
+        NSSize sizeToFit = [self objectSizeToFit:view];
+        if (width < sizeToFit.width)
+            width = sizeToFit.width;
+    }
+    return width;
+}
+
+- (CGFloat)remainingColumnWidth
+{
+    NSUInteger width = [self marginX];
+    if (!_colCount)
+        return 0;
+    NSUInteger autosizedCol = 0;
+    for (NSUInteger i = 0; i < _colCount; i++) {
+        CGFloat constrainedWidth = [self constrainedWidthOfColumn:i];
+        if (!constrainedWidth)
+            autosizedCol++;
+        width += constrainedWidth + [self marginX];
+
+    }
+    CGFloat remaining = 0;
+    if (width < self.bounds.size.width && autosizedCol)
+        remaining = (self.bounds.size.width - width) / autosizedCol;
+    if (remaining < 0)
+        remaining = 0;
+    return remaining;
+}
+
+- (CGFloat)widthOfColumn:(NSUInteger)targetColumn
+{
+    CGFloat width = [self constrainedWidthOfColumn:targetColumn];
+    if (!width)
+        width = [self remainingColumnWidth];
+    return width;
+}
+
+
+- (CGFloat)leftOfColumn:(NSUInteger)targetColumn
+{
+    CGFloat left = [self marginX];
+    for (NSUInteger i = 0; i < targetColumn; i++)
+    {
+        left += [self widthOfColumn:i] + [self marginX];
+
+    }
+    return left;
+}
+
+- (void)relayout
+{
+    for(NSDictionary *obj in _gridedViews) {
+        NSUInteger row = [[obj objectForKey:@"row"] intValue];
+        NSUInteger col = [[obj objectForKey:@"col"] intValue];
+        NSUInteger rowSpan = [[obj objectForKey:@"rowSpan"] intValue];
+        NSUInteger colSpan = [[obj objectForKey:@"colSpan"] intValue];
+        NSView *view = [obj objectForKey:@"view"];
+        NSRect rect;
+
+        // Get the height
+        if ([view autoresizingMask] & NSViewHeightSizable || rowSpan > 1) {
+            CGFloat height = 0;
+            for (NSUInteger r = 0; r < rowSpan; r++) {
+                if (row + r >= _rowCount)
+                    break;
+                height += [self heightOfRow:row + r] + [self marginY];
+            }
+            rect.size.height = height - [self marginY];
+        }
+        else
+            rect.size.height = [self objectSizeToFit:view].height;
+
+        // Get the width
+        if ([view autoresizingMask] & NSViewWidthSizable) {
+            CGFloat width = 0;
+            for (NSUInteger c = 0; c < colSpan; c++)
+                width += [self widthOfColumn:col + c] + [self marginX];
+            rect.size.width = width - [self marginX];
+        }
+        else
+            rect.size.width = [self objectSizeToFit:view].width;
+
+        // Top corner
+        rect.origin.y = [self topOfRow:row] + ([self heightOfRow:row] - rect.size.height) / 2;
+        rect.origin.x = [self leftOfColumn:col];
+
+        [view setFrame:rect];
+        [view setNeedsDisplay:YES];
+    }
+}
+
+- (NSMutableDictionary *)objectForView:(NSView *)view
+{
+    for (NSMutableDictionary *dict in _gridedViews)
+    {
+        if ([dict objectForKey:@"view"] == view)
+            return dict;
+    }
+    return nil;
+}
+
+- (void)addSubview:(NSView *)view atRow:(NSUInteger)row column:(NSUInteger)column rowSpan:(NSUInteger)rowSpan colSpan:(NSUInteger)colSpan
+{
+    if (row + 1 > _rowCount)
+        _rowCount = row + 1;
+    if (column + 1 > _colCount)
+        _colCount = column + 1;
+
+    if (!_gridedViews)
+        _gridedViews = [[NSMutableArray alloc] init];
+
+    NSMutableDictionary *dict = [self objectForView:view];
+    if (!dict) {
+        dict = [NSMutableDictionary dictionary];
+        [dict setObject:view forKey:@"view"];
+        [_gridedViews addObject:dict];
+    }
+    [dict setObject:[NSNumber numberWithInt:rowSpan] forKey:@"rowSpan"];
+    [dict setObject:[NSNumber numberWithInt:colSpan] forKey:@"colSpan"];
+    [dict setObject:[NSNumber numberWithInt:row] forKey:@"row"];
+    [dict setObject:[NSNumber numberWithInt:column] forKey:@"col"];
+
+
+    [self addSubview:view];
+    [self relayout];
+
+    // Recompute the size of the window after making sure we won't see anymore update
+    [NSObject cancelPreviousPerformRequestsWithTarget:self selector:@selector(recomputeWindowSize) object:nil];
+    [self performSelector:@selector(recomputeWindowSize) withObject:nil afterDelay:0.1];
+}
+
+- (void)removeSubview:(NSView *)view
+{
+    NSDictionary *dict = [self objectForView:view];
+    if (dict)
+        [_gridedViews removeObject:dict];
+    [view removeFromSuperview];
+
+    [self recomputeCount];
+    [self recomputeWindowSize];
+
+    [self relayout];
+    [self setNeedsDisplay:YES];
+}
+
+- (void)setFrame:(NSRect)frameRect
+{
+    [super setFrame:frameRect];
+    [self relayout];
+}
+
+- (NSSize)flexSize:(NSSize)size
+{
+    if (!_rowCount || !_colCount)
+        return size;
+
+    CGFloat minHeight = [self marginY];
+    BOOL canFlexHeight = NO;
+    for (NSUInteger i = 0; i < _rowCount; i++) {
+        CGFloat constrained = [self constrainedHeightOfRow:i];
+        if (!constrained) {
+            canFlexHeight = YES;
+            constrained = 128;
+        }
+        minHeight += constrained + [self marginY];
+    }
+
+    CGFloat minWidth = [self marginX];
+    BOOL canFlexWidth = NO;
+    for (NSUInteger i = 0; i < _colCount; i++) {
+        CGFloat constrained = [self constrainedWidthOfColumn:i];
+        if (!constrained) {
+            canFlexWidth = YES;
+            constrained = 128;
+        }
+        minWidth += constrained + [self marginX];
+    }
+    if (size.width < minWidth)
+        size.width = minWidth;
+    if (size.height < minHeight)
+        size.height = minHeight;
+    if (!canFlexHeight)
+        size.height = minHeight;
+    if (!canFlexWidth)
+        size.width = minWidth;
+    return size;
+}
+
+@end
+
+
+static inline NSDictionary *DictFromDialogFatal(dialog_fatal_t *dialog) {
+    return [VLCDialogDisplayer dictionaryForDialog:dialog->title :dialog->message :NULL :NULL :NULL];
+}
+static inline NSDictionary *DictFromDialogLogin(dialog_login_t *dialog) {
+    return [VLCDialogDisplayer dictionaryForDialog:dialog->title :dialog->message :NULL :NULL :NULL];
+}
+static inline NSDictionary *DictFromDialogQuestion(dialog_question_t *dialog) {
+    return [VLCDialogDisplayer dictionaryForDialog:dialog->title :dialog->message :dialog->yes :dialog->no :dialog->cancel];
+}
+static inline NSDictionary *DictFromDialogProgressBar(dialog_progress_bar_t *dialog) {
+    return [VLCDialogDisplayer dictionaryForDialog:dialog->title :dialog->message :NULL :NULL :dialog->cancel];
+}
+
 struct intf_sys_t
 {
-    VLCProgressPanel *currentProgressBarPanel;
+    VLCDialogDisplayer *displayer;
 
     vlc_mutex_t lock;
     vlc_cond_t wait;
+    bool is_hidding_noaction_dialogs;
 };
 
+
+#define T_HIDE_NOACTION N_("Hide no user action dialogs")
+#define LT_HIDE_NOACTION N_("Don't display dialogs that don't require user action (Critical and error panel).")
+
+#define prefix "macosx-dialog-provider"
 /*****************************************************************************
  * Module descriptor
  *****************************************************************************/
 
 vlc_module_begin()
-/* Minimal interface. see intf.m */
-set_shortname("Mac OS X Dialogs")
-add_shortcut("macosx_dialog_provider")
-add_shortcut("miosx")
-set_description("Minimal Mac OS X Dialog Provider")
-set_capability("interface", 50)
-set_callbacks(OpenIntf, CloseIntf)
-set_category(CAT_INTERFACE)
-set_subcategory(SUBCAT_INTERFACE_MAIN)
+    /* Minimal interface. see intf.m */
+    set_shortname("Mac OS X Dialogs")
+    add_shortcut("macosx_dialog_provider")
+    add_shortcut("miosx")
+    set_description("Minimal Mac OS X Dialog Provider")
+    set_capability("interface", 0)
+
+    /* This setting is interesting, because when used with a libvlc app
+     * it's almost certain that the client program will display error by
+     * itself. Moreover certain action might end up in an error, but
+     * the client wants to ignored them completely. */
+    add_bool(prefix "hide-no-user-action-dialogs", true, NULL, T_HIDE_NOACTION, LT_HIDE_NOACTION, false)
+
+    set_callbacks(OpenIntf, CloseIntf)
+    set_category(CAT_INTERFACE)
+    set_subcategory(SUBCAT_INTERFACE_MAIN)
 vlc_module_end()
 
 /*****************************************************************************
@@ -94,45 +544,35 @@ int OpenIntf(vlc_object_t *p_this)
 
     memset(p_intf->p_sys,0,sizeof(*p_intf->p_sys));
 
-    p_intf->b_should_run_on_first_thread = true;
-    p_intf->pf_run = Run;
+    p_intf->p_sys->displayer = [[VLCDialogDisplayer alloc] init];
 
-    msg_Dbg(p_intf,"Opening Mac OS X dialog provider");
-    return VLC_SUCCESS;
-}
+    bool hide = var_CreateGetBool(p_intf, prefix "hide-no-user-action-dialogs");
+    p_intf->p_sys->is_hidding_noaction_dialogs = hide;
 
-/*****************************************************************************
- * Run: waiting for the death
- *****************************************************************************/
-static void Run( intf_thread_t *p_intf )
-{
     /* subscribe to various interactive dialogues */
-    var_Create(p_intf,"dialog-error",VLC_VAR_ADDRESS);
-    var_AddCallback(p_intf,"dialog-error",DisplayError,p_intf);
-    var_Create(p_intf,"dialog-critical",VLC_VAR_ADDRESS);
-    var_AddCallback(p_intf,"dialog-critical",DisplayCritical,p_intf);
+
+    if (!hide)
+    {
+        var_Create(p_intf,"dialog-error",VLC_VAR_ADDRESS);
+        var_AddCallback(p_intf,"dialog-error",DisplayError,p_intf);
+        var_Create(p_intf,"dialog-critical",VLC_VAR_ADDRESS);
+        var_AddCallback(p_intf,"dialog-critical",DisplayCritical,p_intf);
+    }
     var_Create(p_intf,"dialog-login",VLC_VAR_ADDRESS);
     var_AddCallback(p_intf,"dialog-login",DisplayLogin,p_intf);
     var_Create(p_intf,"dialog-question",VLC_VAR_ADDRESS);
     var_AddCallback(p_intf,"dialog-question",DisplayQuestion,p_intf);
     var_Create(p_intf,"dialog-progress-bar",VLC_VAR_ADDRESS);
     var_AddCallback(p_intf,"dialog-progress-bar",DisplayProgressPanelAction,p_intf);
+    var_Create(p_intf,"dialog-extension",VLC_VAR_ADDRESS);
+    var_AddCallback(p_intf,"dialog-extension",DisplayExtension,p_intf);
     dialog_Register(p_intf);
 
     msg_Dbg(p_intf,"Mac OS X dialog provider initialised");
 
-    /* idle */
-    while(vlc_object_alive(p_intf))
-        msleep(INTF_IDLE_SLEEP);
-    
-    /* unsubscribe from the interactive dialogues */
-    dialog_Unregister(p_intf);
-    var_DelCallback(p_intf,"dialog-error",DisplayError,p_intf);
-    var_DelCallback(p_intf,"dialog-critical",DisplayCritical,p_intf);
-    var_DelCallback(p_intf,"dialog-login",DisplayLogin,p_intf);
-    var_DelCallback(p_intf,"dialog-question",DisplayQuestion,p_intf);
-    var_DelCallback(p_intf,"dialog-progress-bar",DisplayProgressPanelAction,p_intf);
+    return VLC_SUCCESS;
 }
+
 /*****************************************************************************
  * CloseIntf: destroy interface
  *****************************************************************************/
@@ -140,6 +580,21 @@ void CloseIntf(vlc_object_t *p_this)
 {
     intf_thread_t *p_intf = (intf_thread_t*) p_this;
 
+    /* unsubscribe from the interactive dialogues */
+    dialog_Unregister(p_intf);
+
+    if (!p_intf->p_sys->is_hidding_noaction_dialogs)
+    {
+        var_DelCallback(p_intf,"dialog-error",DisplayError,p_intf);
+        var_DelCallback(p_intf,"dialog-critical",DisplayCritical,p_intf);
+    }
+    var_DelCallback(p_intf,"dialog-login",DisplayLogin,p_intf);
+    var_DelCallback(p_intf,"dialog-question",DisplayQuestion,p_intf);
+    var_DelCallback(p_intf,"dialog-progress-bar",DisplayProgressPanelAction,p_intf);
+    var_DelCallback(p_intf,"dialog-extension",DisplayExtension,p_intf);
+
+    [p_intf->p_sys->displayer release];
+
     msg_Dbg(p_intf,"Mac OS X dialog provider closed");
     free(p_intf->p_sys);
 }
@@ -150,144 +605,675 @@ void CloseIntf(vlc_object_t *p_this)
  *****************************************************************************/
 static int DisplayError(vlc_object_t *p_this, const char *type, vlc_value_t previous, vlc_value_t value, void *data)
 {
-    NSAutoreleasePool * o_pool = [[NSAutoreleasePool alloc] init];
-    dialog_fatal_t *p_dialog = (dialog_fatal_t *)value.p_address;
-    NSRunInformationalAlertPanel([NSString stringWithUTF8String:p_dialog->title],
-                            [NSString stringWithUTF8String:p_dialog->message],
-                            @"OK", nil, nil);
-    [o_pool release];
+    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
+    dialog_fatal_t *dialog = value.p_address;
+    intf_thread_t *p_intf = (intf_thread_t*) p_this;
+    intf_sys_t *sys = p_intf->p_sys;
+    [sys->displayer performSelectorOnMainThread:@selector(displayError:) withObject:DictFromDialogFatal(dialog) waitUntilDone:NO];
+    [pool release];
     return VLC_SUCCESS;
 }
 
 static int DisplayCritical(vlc_object_t *p_this, const char *type, vlc_value_t previous, vlc_value_t value, void *data)
 {
-    NSAutoreleasePool * o_pool = [[NSAutoreleasePool alloc] init];
-    dialog_fatal_t *p_dialog = (dialog_fatal_t *)value.p_address;
-    NSRunCriticalAlertPanel([NSString stringWithUTF8String:p_dialog->title],
-                            [NSString stringWithUTF8String:p_dialog->message],
-                            @"OK", nil, nil);
-    [o_pool release];
+    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
+    dialog_fatal_t *dialog = value.p_address;
+    intf_thread_t *p_intf = (intf_thread_t*) p_this;
+    intf_sys_t *sys = p_intf->p_sys;
+    [sys->displayer performSelectorOnMainThread:@selector(displayCritical:) withObject:DictFromDialogFatal(dialog) waitUntilDone:NO];
+    [pool release];
     return VLC_SUCCESS;
 }
 
 static int DisplayQuestion(vlc_object_t *p_this, const char *type, vlc_value_t previous, vlc_value_t value, void *data)
 {
-    NSAutoreleasePool * o_pool = [[NSAutoreleasePool alloc] init];
-    dialog_question_t *p_dialog = (dialog_question_t *)value.p_address;
-    NSAlert *o_alert;
-    NSString *o_yes, *o_no, *o_cancel;
-    NSInteger i_returnValue = 0;
-
-    if (p_dialog->yes != NULL)
-        o_yes = [NSString stringWithUTF8String:p_dialog->yes];
-    if (p_dialog->no != NULL)
-        o_no = [NSString stringWithUTF8String:p_dialog->no];
-    if (p_dialog->cancel != NULL)
-        o_cancel = [NSString stringWithUTF8String:p_dialog->cancel];
-
-    o_alert = [NSAlert alertWithMessageText:[NSString stringWithUTF8String:p_dialog->title]
-                              defaultButton:o_yes
-                            alternateButton:o_no 
-                                otherButton:o_cancel
-                  informativeTextWithFormat:[NSString stringWithUTF8String:p_dialog->message]];
-    [o_alert setAlertStyle:NSInformationalAlertStyle];
-    i_returnValue = [o_alert runModal];
-
-    if (i_returnValue == NSAlertDefaultReturn)
-        p_dialog->answer = 1;
-    if (i_returnValue == NSAlertAlternateReturn)
-        p_dialog->answer = 2;
-    if (i_returnValue == NSAlertOtherReturn)
-        p_dialog->answer = 3;
-    [o_pool release];
+    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
+    dialog_question_t *dialog = value.p_address;
+    intf_thread_t *p_intf = (intf_thread_t*) p_this;
+    intf_sys_t *sys = p_intf->p_sys;
+    dialog->answer = [[sys->displayer resultFromSelectorOnMainThread:@selector(displayQuestion:) withObject:DictFromDialogQuestion(dialog)] intValue];
+    [pool release];
     return VLC_SUCCESS;
 }
 
 static int DisplayLogin(vlc_object_t *p_this, const char *type, vlc_value_t previous, vlc_value_t value, void *data)
 {
-    NSAutoreleasePool * o_pool = [[NSAutoreleasePool alloc] init];
-    dialog_login_t *p_dialog = (dialog_login_t *)value.p_address;
-    NSInteger i_returnValue = 0;
-    VLCLoginPanel *thePanel = [[VLCLoginPanel alloc] init];
-    [thePanel createContentView];
-    [thePanel setDialogTitle:[NSString stringWithUTF8String:p_dialog->title]];
-    [thePanel setDialogMessage:[NSString stringWithUTF8String:p_dialog->message]];
-    [thePanel center];
-    i_returnValue = [NSApp runModalForWindow:thePanel];
-    [thePanel close];
-    if (i_returnValue) {
-        *p_dialog->username = strdup( [[thePanel userName] UTF8String] );
-        *p_dialog->password = strdup( [[thePanel password] UTF8String] );
-    } else
-        *p_dialog->username = *p_dialog->password = NULL;
-    [o_pool release];
+    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
+    dialog_login_t *dialog = value.p_address;
+    intf_thread_t *p_intf = (intf_thread_t*) p_this;
+    intf_sys_t *sys = p_intf->p_sys;
+    NSDictionary *dict = [sys->displayer resultFromSelectorOnMainThread:@selector(displayLogin:) withObject:DictFromDialogLogin(dialog)];
+    if (dict) {
+        *dialog->username = strdup([[dict objectForKey:@"username"] UTF8String]);
+        *dialog->password = strdup([[dict objectForKey:@"password"] UTF8String]);
+    }
+    [pool release];
     return VLC_SUCCESS;
 }
 
 static int DisplayProgressPanelAction(vlc_object_t *p_this, const char *type, vlc_value_t previous, vlc_value_t value, void *data)
 {
-    NSAutoreleasePool * o_pool = [[NSAutoreleasePool alloc] init];
-    dialog_progress_bar_t * p_dialog = (dialog_progress_bar_t *)value.p_address;
+    NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
+    dialog_progress_bar_t *dialog = value.p_address;
+    intf_thread_t *p_intf = (intf_thread_t*) p_this;
+    intf_sys_t *sys = p_intf->p_sys;
+
+    [sys->displayer performSelectorOnMainThread:@selector(displayProgressBar:) withObject:DictFromDialogProgressBar(dialog) waitUntilDone:YES];
+
+    dialog->pf_update = updateProgressPanel;
+    dialog->pf_check = checkProgressPanel;
+    dialog->pf_destroy = destroyProgressPanel;
+    dialog->p_sys = p_intf->p_sys;
+
+    [pool release];
+    return VLC_SUCCESS;
+}
+
+static int DisplayExtension(vlc_object_t *p_this, const char *type, vlc_value_t previous, vlc_value_t value, void *data)
+{
+    NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
     intf_thread_t *p_intf = (intf_thread_t*) p_this;
-    intf_sys_t *p_sys = p_intf->p_sys;
-
-    if(p_sys->currentProgressBarPanel)
-        [p_sys->currentProgressBarPanel release];
-
-    p_sys->currentProgressBarPanel = [[VLCProgressPanel alloc] init];
-    [p_sys->currentProgressBarPanel createContentView];
-    if (p_dialog->title)
-        [p_sys->currentProgressBarPanel setDialogTitle:[NSString stringWithUTF8String:p_dialog->title]];
-    if (p_dialog->message)
-        [p_sys->currentProgressBarPanel setDialogMessage:[NSString stringWithUTF8String:p_dialog->message]];
-    if (p_dialog->cancel)
-        [p_sys->currentProgressBarPanel setCancelButtonLabel:[NSString stringWithUTF8String:p_dialog->cancel]];
-    [p_sys->currentProgressBarPanel center];
-    [p_sys->currentProgressBarPanel makeKeyAndOrderFront:nil];
-
-    p_dialog->pf_update = updateProgressPanel;
-    p_dialog->pf_check = checkProgressPanel;
-    p_dialog->pf_destroy = destroyProgressPanel;
-    p_dialog->p_sys = p_intf->p_sys;
-
-    [o_pool release];
+    intf_sys_t *sys = p_intf->p_sys;
+    extension_dialog_t *dialog = value.p_address;
+
+    // -updateExtensionDialog: Open its own runloop, so be sure to run on DefaultRunLoop.
+    [sys->displayer performSelectorOnMainThread:@selector(updateExtensionDialog:) withObject:[NSValue valueWithPointer:dialog] waitUntilDone:YES];
+    [pool release];
     return VLC_SUCCESS;
 }
 
+
 void updateProgressPanel (void *priv, const char *text, float value)
 {
-    NSAutoreleasePool *o_pool = [[NSAutoreleasePool alloc] init];
-    intf_sys_t *p_sys = (intf_sys_t *)priv;
+    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
+    intf_sys_t *sys = (intf_sys_t *)priv;
 
-    if (text)
-        [p_sys->currentProgressBarPanel setDialogMessage:[NSString stringWithUTF8String:text]];
-    else
-        [p_sys->currentProgressBarPanel setDialogMessage:@""];
-    [p_sys->currentProgressBarPanel setProgressAsDouble:(double)(value * 1000.)];
+    NSDictionary *dict = [NSDictionary dictionaryWithObjectsAndKeys:
+                          [NSNumber numberWithFloat:value], @"value",
+                          text ? [NSString stringWithUTF8String:text] : nil, @"text",
+                          nil];
 
-    [o_pool release];
+    [sys->displayer performSelectorOnMainThread:@selector(updateProgressPanel:) withObject:dict waitUntilDone:YES];
+
+    [pool release];
 }
 
 void destroyProgressPanel (void *priv)
 {
-    NSAutoreleasePool *o_pool = [[NSAutoreleasePool alloc] init];
-    intf_sys_t *p_sys = (intf_sys_t *)priv;
+    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
+    intf_sys_t *sys = (intf_sys_t *)priv;
 
-    [p_sys->currentProgressBarPanel close];
-    [p_sys->currentProgressBarPanel release];
+    [sys->displayer performSelectorOnMainThread:@selector(destroyProgressPanel) withObject:nil waitUntilDone:YES];
 
-    [o_pool release];
+    [pool release];
 }
 
 bool checkProgressPanel (void *priv)
 {
-    NSAutoreleasePool *o_pool = [[NSAutoreleasePool alloc] init];
-    intf_sys_t *p_sys = (intf_sys_t *)priv;
-    BOOL b_returned;
+    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
+    intf_sys_t *sys = (intf_sys_t *)priv;
+    BOOL ret;
+
+    ret = [[sys->displayer resultFromSelectorOnMainThread:@selector(checkProgressPanel) withObject:nil] boolValue];
+
+    [pool release];
+    return ret;
+}
+
+
+@implementation VLCDialogDisplayer
+- (void)dealloc
+{
+    assert(!_currentProgressBarPanel); // This has to be closed on main thread.
+    [super dealloc];
+}
+
++ (NSDictionary *)dictionaryForDialog:(const char *)title :(const char *)message :(const char *)yes :(const char *)no :(const char *)cancel
+{
+    NSMutableDictionary *dict = [NSMutableDictionary dictionary];
+    if (title)
+        [dict setObject:[NSString stringWithUTF8String:title] forKey:@"title"];
+    if (message)
+        [dict setObject:[NSString stringWithUTF8String:message] forKey:@"message"];
+    if (yes)
+        [dict setObject:[NSString stringWithUTF8String:yes] forKey:@"yes"];
+    if (no)
+        [dict setObject:[NSString stringWithUTF8String:no] forKey:@"no"];
+    if (cancel)
+        [dict setObject:[NSString stringWithUTF8String:cancel] forKey:@"cancel"];
+
+    return dict;
+}
+#define VLCAssertIsMainThread() assert([NSThread isMainThread])
+
+- (void)displayError:(NSDictionary *)dialog
+{
+    VLCAssertIsMainThread();
+
+    NSRunInformationalAlertPanel([dialog objectForKey:@"title"],
+                                 [dialog objectForKey:@"message"],
+                                 @"OK", nil, nil);
+}
+
+- (void)displayCritical:(NSDictionary *)dialog
+{
+    VLCAssertIsMainThread();
+
+    NSRunCriticalAlertPanel([dialog objectForKey:@"title"],
+                                 [dialog objectForKey:@"message"],
+                                 @"OK", nil, nil);
+}
+
+- (NSNumber *)displayQuestion:(NSDictionary *)dialog
+{
+    VLCAssertIsMainThread();
+
+    NSInteger alertRet = 0;
+
+    NSAlert *alert = [NSAlert alertWithMessageText:[dialog objectForKey:@"title"]
+                              defaultButton:[dialog objectForKey:@"yes"]
+                            alternateButton:[dialog objectForKey:@"no"]
+                                otherButton:[dialog objectForKey:@"cancel"]
+                  informativeTextWithFormat:[dialog objectForKey:@"message"]];
+    [alert setAlertStyle:NSInformationalAlertStyle];
+    alertRet = [alert runModal];
+
+    int ret;
+    switch (alertRet) {
+        case NSAlertDefaultReturn:
+            ret = 1;
+            break;
+        case NSAlertAlternateReturn:
+            ret = 2;
+            break;
+        case NSAlertOtherReturn:
+            ret = 3;
+            break;
+        default:
+            assert(0);
+            ret = 0;
+            break;
+    }
+
+    return [NSNumber numberWithInt:ret];
+}
+
+- (NSDictionary *)displayLogin:(NSDictionary *)dialog
+{
+    VLCAssertIsMainThread();
+
+    VLCLoginPanel *panel = [[VLCLoginPanel alloc] init];
+    [panel createContentView];
+    [panel setDialogTitle:[dialog objectForKey:@"title"]];
+    [panel setDialogMessage:[dialog objectForKey:@"message"]];
+    [panel center];
+    NSInteger ret = [NSApp runModalForWindow:panel];
+    [panel close];
+
+    if (!ret)
+        return nil;
+
+    return [NSDictionary dictionaryWithObjectsAndKeys:
+            [panel userName], @"username",
+            [panel password], @"password",
+            nil];
+}
+
+- (void)displayProgressBar:(NSDictionary *)dialog
+{
+    VLCAssertIsMainThread();
+
+    if(_currentProgressBarPanel)
+        [self destroyProgressPanel];
+
+    assert(!_currentProgressBarPanel);
+    _currentProgressBarPanel = [[VLCProgressPanel alloc] init];
+    [_currentProgressBarPanel createContentView];
+    [_currentProgressBarPanel setDialogTitle:[dialog objectForKey:@"title"]];
+    [_currentProgressBarPanel setDialogMessage:[dialog objectForKey:@"message"] ?: @""];
+    [_currentProgressBarPanel setCancelButtonLabel:[dialog objectForKey:@"cancel"]];
+
+    [_currentProgressBarPanel center];
+    [_currentProgressBarPanel makeKeyAndOrderFront:nil];
+}
+
+- (void)updateProgressPanel:(NSDictionary *)dict
+{
+    VLCAssertIsMainThread();
+
+    assert(_currentProgressBarPanel);
+    [_currentProgressBarPanel setDialogMessage:[dict objectForKey:@"text"] ?: @""];
+    [_currentProgressBarPanel setProgressAsDouble:[[dict objectForKey:@"value"] doubleValue] * 1000.];
+}
+
+- (void)destroyProgressPanel
+{
+    VLCAssertIsMainThread();
+
+    [_currentProgressBarPanel close];
+    [_currentProgressBarPanel release];
+    _currentProgressBarPanel = nil;
+}
+
+- (NSNumber *)checkProgressPanel
+{
+    VLCAssertIsMainThread();
+
+    return [NSNumber numberWithBool:[_currentProgressBarPanel isCancelled]];
+}
+
+#pragma mark -
+#pragma mark Extensions Dialog
+
+- (void)triggerClick:(id)sender
+{
+    assert([sender isKindOfClass:[VLCDialogButton class]]);
+    VLCDialogButton *button = sender;
+    extension_widget_t *widget = [button widget];
+
+    NSLog(@"(triggerClick)");
+    vlc_mutex_lock(&widget->p_dialog->lock);
+    extension_WidgetClicked(widget->p_dialog, widget);
+    vlc_mutex_unlock(&widget->p_dialog->lock);
+}
+
+- (void)syncTextField:(NSNotification *)notifcation
+{
+    id sender = [notifcation object];
+    assert([sender isKindOfClass:[VLCDialogTextField class]]);
+    VLCDialogTextField *field = sender;
+    extension_widget_t *widget = [field widget];
+
+    vlc_mutex_lock(&widget->p_dialog->lock);
+    free(widget->psz_text);
+    widget->psz_text = strdup([[field stringValue] UTF8String]);
+    vlc_mutex_unlock(&widget->p_dialog->lock);
+}
+
+- (void)tableViewSelectionDidChange:(NSNotification *)notifcation
+{
+    id sender = [notifcation object];
+    assert(sender && [sender isKindOfClass:[VLCDialogList class]]);
+    VLCDialogList *list = sender;
+
+    struct extension_widget_value_t *value;
+    unsigned i = 0;
+    for(value = [list widget]->p_values; value != NULL; value = value->p_next, i++)
+        value->b_selected = (i == [list selectedRow]);
+}
+
+- (void)popUpSelectionChanged:(id)sender
+{
+    assert([sender isKindOfClass:[VLCDialogPopUpButton class]]);
+    VLCDialogPopUpButton *popup = sender;
+    struct extension_widget_value_t *value;
+    unsigned i = 0;
+    for(value = [popup widget]->p_values; value != NULL; value = value->p_next, i++)
+        value->b_selected = (i == [popup indexOfSelectedItem]);
 
-    b_returned = [p_sys->currentProgressBarPanel isCancelled];
+}
+
+- (NSSize)windowWillResize:(NSWindow *)sender toSize:(NSSize)frameSize
+{
+    NSView *contentView = [sender contentView];
+    assert([contentView isKindOfClass:[VLCDialogGridView class]]);
+    VLCDialogGridView *gridView = (VLCDialogGridView *)contentView;
+
+    NSRect rect = NSMakeRect(0, 0, 0, 0);
+    rect.size = frameSize;
+    rect = [sender contentRectForFrameRect:rect];
+    rect.size = [gridView flexSize:rect.size];
+    rect = [sender frameRectForContentRect:rect];
+    return rect.size;
+}
+
+- (BOOL)windowShouldClose:(id)sender
+{
+    assert([sender isKindOfClass:[VLCDialogWindow class]]);
+    VLCDialogWindow *window = sender;
+    extension_dialog_t *dialog = [window dialog];
+    extension_DialogClosed(dialog);
+    dialog->p_sys_intf = NULL;
+    return YES;
+}
+
+static NSView *createControlFromWidget(extension_widget_t *widget, id self)
+{
+    assert(!widget->p_sys_intf);
+
+    switch (widget->type)
+    {
+        case EXTENSION_WIDGET_HTML:
+        {
+//            NSScrollView *scrollView = [[NSScrollView alloc] init];
+//            [scrollView setHasVerticalScroller:YES];
+//            NSTextView *field = [[NSTextView alloc] init];
+//            [scrollView setDocumentView:field];
+//            [scrollView setAutoresizesSubviews:YES];
+//            [scrollView setAutoresizingMask:NSViewHeightSizable | NSViewWidthSizable];
+//            [field release];
+//            return scrollView;
+            NSTextView *field = [[NSTextView alloc] init];
+            [field setAutoresizingMask:NSViewHeightSizable | NSViewWidthSizable];
+            [field setDrawsBackground:NO];
+            return field;
+        }
+        case EXTENSION_WIDGET_LABEL:
+        {
+            NSTextField *field = [[NSTextField alloc] init];
+            [field setEditable:NO];
+            [field setBordered:NO];
+            [field setDrawsBackground:NO];
+            [field setFont:[NSFont systemFontOfSize:0]];
+            [[field cell] setControlSize:NSRegularControlSize];
+            [field setAutoresizingMask:NSViewNotSizable];
+            return field;
+        }
+        case EXTENSION_WIDGET_TEXT_FIELD:
+        {
+            VLCDialogTextField *field = [[VLCDialogTextField alloc] init];
+            [field setWidget:widget];
+            [field setAutoresizingMask:NSViewWidthSizable];
+            [field setFont:[NSFont systemFontOfSize:0]];
+            [[field cell] setControlSize:NSRegularControlSize];
+            [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(syncTextField:)  name:NSControlTextDidChangeNotification object:field];
+            return field;
+        }
+        case EXTENSION_WIDGET_BUTTON:
+        {
+            VLCDialogButton *button = [[VLCDialogButton alloc] init];
+            [button setBezelStyle:NSRoundedBezelStyle];
+            [button setWidget:widget];
+            [button setAction:@selector(triggerClick:)];
+            [button setTarget:self];
+            [[button cell] setControlSize:NSRegularControlSize];
+            [button setAutoresizingMask:NSViewNotSizable];
+            return button;
+        }
+        case EXTENSION_WIDGET_DROPDOWN:
+        {
+            VLCDialogPopUpButton *popup = [[VLCDialogPopUpButton alloc] init];
+            [popup setAction:@selector(popUpSelectionChanged:)];
+            [popup setTarget:self];
+            [popup setWidget:widget];
+            return popup;
+        }
+        case EXTENSION_WIDGET_LIST:
+        {
+            NSScrollView *scrollView = [[NSScrollView alloc] init];
+            [scrollView setHasVerticalScroller:YES];
+            VLCDialogList *list = [[VLCDialogList alloc] init];
+            [list setUsesAlternatingRowBackgroundColors:YES];
+            [list setHeaderView:nil];
+            [scrollView setDocumentView:list];
+            [scrollView setAutoresizingMask:NSViewHeightSizable | NSViewWidthSizable];
+
+            NSTableColumn *column = [[NSTableColumn alloc] init];
+            [list addTableColumn:column];
+            [column release];
+            [list setDataSource:list];
+            [list setDelegate:self];
+            [list setWidget:widget];
+            [list release];
+            return scrollView;
+        }
+        case EXTENSION_WIDGET_IMAGE:
+        {
+            NSImageView *imageView = [[NSImageView alloc] init];
+            [imageView setAutoresizingMask:NSViewHeightSizable | NSViewWidthSizable];
+            [imageView setImageFrameStyle:NSImageFramePhoto];
+            [imageView setImageScaling:NSImageScaleProportionallyUpOrDown];
+            return imageView;
+        }
+        default:
+            assert(0);
+            return nil;
+    }
 
-    [o_pool release];
-    return b_returned;
 }
 
+static void updateControlFromWidget(NSView *control, extension_widget_t *widget, id self)
+{
+    switch (widget->type)
+    {
+        case EXTENSION_WIDGET_HTML:
+//        {
+//            // Get the scroll view
+//            assert([control isKindOfClass:[NSScrollView class]]);
+//            NSScrollView *scrollView = (NSScrollView *)control;
+//            control = [scrollView documentView];
+//
+//            assert([control isKindOfClass:[NSTextView class]]);
+//            NSTextView *textView = (NSTextView *)control;
+//            NSString *string = [NSString stringWithUTF8String:widget->psz_text];
+//            NSAttributedString *attrString = [[NSAttributedString alloc] initWithHTML:[string dataUsingEncoding:NSUTF8StringEncoding] documentAttributes:NULL];
+//            [[textView textStorage] setAttributedString:[[NSAttributedString alloc] initWithString:@"Hello"]];
+//            NSLog(@"%@", string);
+//            [textView setNeedsDisplay:YES];
+//            [textView scrollRangeToVisible:NSMakeRange(0, 0)];
+//            [attrString release];
+//            break;
+//
+//        }
+        {
+            assert([control isKindOfClass:[NSTextView class]]);
+            NSTextView *textView = (NSTextView *)control;
+            NSString *string = [NSString stringWithUTF8String:widget->psz_text];
+            NSAttributedString *attrString = [[NSAttributedString alloc] initWithHTML:[string dataUsingEncoding:NSUTF8StringEncoding] documentAttributes:NULL];
+            [[textView textStorage] setAttributedString:attrString];
+            [textView setNeedsDisplay:YES];
+            [textView scrollRangeToVisible:NSMakeRange(0, 0)];
+            [attrString release];
+            break;
+
+        }
+        case EXTENSION_WIDGET_LABEL:
+        case EXTENSION_WIDGET_PASSWORD:
+        case EXTENSION_WIDGET_TEXT_FIELD:
+        {
+            if (!widget->psz_text)
+                break;
+            assert([control isKindOfClass:[NSControl class]]);
+            NSControl *field = (NSControl *)control;
+            NSString *string = [NSString stringWithUTF8String:widget->psz_text];
+            NSAttributedString *attrString = [[NSAttributedString alloc] initWithHTML:[string dataUsingEncoding:NSUTF8StringEncoding] documentAttributes:NULL];
+            [field setAttributedStringValue:attrString];
+            [attrString release];
+            break;
+        }
+        case EXTENSION_WIDGET_BUTTON:
+        {
+            assert([control isKindOfClass:[NSButton class]]);
+            NSButton *button = (NSButton *)control;
+            if (!widget->psz_text)
+                break;
+            [button setTitle:[NSString stringWithUTF8String:widget->psz_text]];
+            break;
+        }
+        case EXTENSION_WIDGET_DROPDOWN:
+        {
+            assert([control isKindOfClass:[NSPopUpButton class]]);
+            NSPopUpButton *popup = (NSPopUpButton *)control;
+            [popup removeAllItems];
+            struct extension_widget_value_t *value;
+            for(value = widget->p_values; value != NULL; value = value->p_next)
+            {
+                [popup addItemWithTitle:[NSString stringWithUTF8String:value->psz_text]];
+            }
+            [popup synchronizeTitleAndSelectedItem];
+            [self popUpSelectionChanged:popup];
+            break;
+        }
+
+        case EXTENSION_WIDGET_LIST:
+        {
+            assert([control isKindOfClass:[NSScrollView class]]);
+            NSScrollView *scrollView = (NSScrollView *)control;
+            assert([[scrollView documentView] isKindOfClass:[VLCDialogList class]]);
+            VLCDialogList *list = (VLCDialogList *)[scrollView documentView];
+
+            NSMutableArray *contentArray = [NSMutableArray array];
+            struct extension_widget_value_t *value;
+            for(value = widget->p_values; value != NULL; value = value->p_next)
+            {
+                NSDictionary *entry = [NSDictionary dictionaryWithObjectsAndKeys:
+                                       [NSNumber numberWithInt:value->i_id], @"id",
+                                       [NSString stringWithUTF8String:value->psz_text], @"text",
+                                       nil];
+                [contentArray addObject:entry];
+            }
+            list.contentArray = contentArray;
+            [list reloadData];
+            break;
+        }
+        case EXTENSION_WIDGET_IMAGE:
+        {
+            assert([control isKindOfClass:[NSImageView class]]);
+            NSImageView *imageView = (NSImageView *)control;
+            NSString *string = widget->psz_text ? [NSString stringWithUTF8String:widget->psz_text] : nil;
+            NSImage *image = nil;
+            NSLog(@"Setting image to %@", string);
+            if (string)
+                image = [[NSImage alloc] initWithContentsOfURL:[NSURL fileURLWithPath:string]];
+            [imageView setImage:image];
+            [image release];
+            break;
+        }
+    }
+
+}
+
+- (void)updateWidgets:(extension_dialog_t *)dialog
+{
+    extension_widget_t *widget;
+    NSWindow *window = dialog->p_sys_intf;
+    FOREACH_ARRAY(widget, dialog->widgets)
+    {
+        if (!widget)
+            continue; /* Some widgets may be NULL at this point */
+
+        BOOL shouldDestroy = widget->b_kill;
+        NSView *control = widget->p_sys_intf;
+        BOOL update = widget->b_update;
+
+
+        if (!control && !shouldDestroy)
+        {
+            control = createControlFromWidget(widget, self);
+            updateControlFromWidget(control, widget, self);
+            widget->p_sys_intf = control;
+            update = YES; // Force update and repositionning
+            [control setHidden:widget->b_hide];
+        }
+
+        if (update && !shouldDestroy)
+        {
+            updateControlFromWidget(control, widget, self);
+            [control setHidden:widget->b_hide];
+
+            int row = widget->i_row - 1;
+            int col = widget->i_column - 1;
+            int hsp = __MAX( 1, widget->i_horiz_span );
+            int vsp = __MAX( 1, widget->i_vert_span );
+            if( row < 0 )
+            {
+                row = 4;
+                col = 0;
+            }
+
+            VLCDialogGridView *gridView = (VLCDialogGridView *)[window contentView];
+            [gridView addSubview:control atRow:row column:col rowSpan:vsp colSpan:hsp];
+
+            //this->resize( sizeHint() );
+            widget->b_update = false;
+        }
+
+        if (shouldDestroy)
+        {
+            VLCDialogGridView *gridView = (VLCDialogGridView *)[window contentView];
+            [gridView removeSubview:control];
+            [control release];
+            widget->p_sys_intf = NULL;
+        }
+    }
+    FOREACH_END()
+}
+
+- (void)updateExtensionDialog:(NSValue *)extensionDialog
+{
+    extension_dialog_t *dialog = [extensionDialog pointerValue];
+
+    vlc_mutex_lock(&dialog->lock);
+
+    NSSize size = NSMakeSize(dialog->i_width, dialog->i_height);
+
+    BOOL shouldDestroy = dialog->b_kill;
+
+    if (!dialog->i_width || !dialog->i_height)
+        size = NSMakeSize(640, 480);
+
+    VLCDialogWindow *window = dialog->p_sys_intf;
+    if (!window && !shouldDestroy)
+    {
+        NSRect content = NSMakeRect(0, 0, 1, 1);
+        window = [[VLCDialogWindow alloc] initWithContentRect:content styleMask:NSTitledWindowMask | NSClosableWindowMask | NSResizableWindowMask backing:NSBackingStoreBuffered defer:NO];
+        [window setDelegate:self];
+        [window setDialog:dialog];
+        [window setTitle:[NSString stringWithUTF8String:dialog->psz_title]];
+        VLCDialogGridView *gridView = [[VLCDialogGridView alloc] init];
+        [gridView setAutoresizingMask:NSViewHeightSizable | NSViewWidthSizable];
+        [window setContentView:gridView];
+        [gridView release];
+        dialog->p_sys_intf = window;
+    }
+
+    [self updateWidgets:dialog];
+
+    if (shouldDestroy)
+    {
+        [window setDelegate:nil];
+        [window close];
+        dialog->p_sys_intf = NULL;
+        window = nil;
+    }
+
+    if (!dialog->b_hide && ![window isVisible]) {
+        [window center];
+        [window makeKeyAndOrderFront:self];
+    }
+
+    vlc_cond_signal(&dialog->cond);
+    vlc_mutex_unlock(&dialog->lock);
+}
+
+
+/**
+ * Helper to execute a function on main thread and get its return value.
+ */
+- (void)execute:(NSDictionary *)dict
+{
+    SEL sel = [[dict objectForKey:@"sel"] pointerValue];
+    id *result = [[dict objectForKey:@"result"] pointerValue];
+    id object = [dict objectForKey:@"object"];
+
+    NSAssert(sel, @"Try to execute a NULL selector");
+
+    *result = [self performSelector:sel withObject:object];
+    [*result retain]; // Balanced in -resultFromSelectorOnMainThread
+}
+
+- (id)resultFromSelectorOnMainThread:(SEL)sel withObject:(id)object
+{
+    id result = nil;
+    NSAssert(sel, @"Try to execute a NULL selector");
+    NSDictionary *dict = [NSDictionary dictionaryWithObjectsAndKeys:
+     [NSValue valueWithPointer:sel], @"sel",
+     [NSValue valueWithPointer:&result], @"result",
+     object, @"object", nil];
+    [self performSelectorOnMainThread:@selector(execute:) withObject:dict waitUntilDone:YES];
+    return [result autorelease];
+}
+@end
+
+
+