Implement Fl_Window::icon() and default_icon() for macOS

The implementation is effective for macOS 10.10 and above.
Demo program test/device uses the new implementation.

src/Fl_cocoa.mm

@@ -582,6 +582,7 @@ void Fl_Cocoa_Screen_Driver::breakMacEventLoop()
 #if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_14
   if (views_use_CA) [(FLView*)[self contentView] reset_aux_bitmap];
 #endif
+  [[self standardWindowButton:NSWindowDocumentIconButton] setImage:nil];
   [super close];
   // when a fullscreen window is closed, windowDidResize may be sent after the close message was sent
   // and before the FLWindow receives the final dealloc message
@@ -1133,6 +1134,7 @@ static FLTextView *fltextview_instance = nil;
 - (BOOL)windowShouldClose:(id)fl;
 - (void)anyWindowWillClose:(NSNotification *)notif;
 - (void)doNothing:(id)unused;
+- (BOOL)window:(NSWindow *)window shouldPopUpDocumentPathMenu:(NSMenu *)menu;
 @end
 
 
@@ -1390,6 +1392,9 @@ static FLWindowDelegate *flwindowdelegate_instance = nil;
 {
   return;
 }
+- (BOOL)window:(NSWindow *)window shouldPopUpDocumentPathMenu:(NSMenu *)menu {
+  return NO;
+}
 @end
 
 @interface FLAppDelegate : NSObject 
@@ -3075,6 +3080,16 @@ Fl_X* Fl_Cocoa_Window_Driver::makeWindow()
   [cw setLevel:winlevel];
   
   q_set_window_title(cw, w->label(), w->iconlabel());
+  NSImage *icon = icon_image; // is a window or default icon present?
+  if (!icon) icon = ((Fl_Cocoa_Screen_Driver*)Fl::screen_driver())->default_icon;
+  if (icon && (winstyle & NSTitledWindowMask) && w->label() && strlen(w->label())>0) {
+    [cw setRepresentedFilename:[NSString stringWithFormat:@"/%@", [cw title]]];
+    NSButton *icon_button = [cw standardWindowButton:NSWindowDocumentIconButton];
+    if (icon_button) {
+      [icon setSize:[icon_button frame].size];
+      [icon_button setImage:icon];
+    }
+  }
   if (!force_position()) {
     if (w->modal()) {
       [cw center];
@@ -4435,6 +4450,52 @@ char *Fl_Darwin_System_Driver::preference_rootnode(Fl_Preferences *prefs, Fl_Pre
   return filename;
 }
 
+Fl_Cocoa_Window_Driver::~Fl_Cocoa_Window_Driver()
+{
+  if (shape_data_) {
+    if (shape_data_->mask) {
+      CGImageRelease(shape_data_->mask);
+    }
+    delete shape_data_;
+  }
+  [icon_image release];
+}
+
+static NSImage* rgb_to_nsimage(const Fl_RGB_Image *rgb) {
+  if (!rgb) return nil;
+  int ld = rgb->ld();
+  if (!ld) ld = rgb->w() * rgb->d();
+  NSImage *win_icon = nil;
+#if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_4
+  if (fl_mac_os_version >= 101000) {
+    NSBitmapImageRep *bitmap = [[NSBitmapImageRep alloc] initWithBitmapDataPlanes:NULL pixelsWide:rgb->w() pixelsHigh:rgb->h()
+                                                                    bitsPerSample:8 samplesPerPixel:rgb->d() hasAlpha:!(rgb->d() & 1) isPlanar:NO
+                                                                   colorSpaceName:(rgb->d()<=2) ? NSDeviceWhiteColorSpace : NSDeviceRGBColorSpace
+                                                                     bitmapFormat:NSAlphaNonpremultipliedBitmapFormat bytesPerRow:ld bitsPerPixel:rgb->d()*8]; // 10.4
+    memcpy([bitmap bitmapData], rgb->array, rgb->h() * ld);
+    win_icon = [[NSImage alloc] initWithSize:NSMakeSize(0, 0)];
+    [win_icon addRepresentation:bitmap];
+    [bitmap release];
+  }
+#endif
+  return win_icon;
+}
+
+void Fl_Cocoa_Window_Driver::icons(const Fl_RGB_Image *icons[], int count) {
+  [icon_image release];
+  icon_image = nil;
+  if (count >= 1 && pWindow->border() && pWindow->label() && strlen(pWindow->label())) {
+    icon_image = rgb_to_nsimage(icons[0]);
+  }
+}
+
+void Fl_Cocoa_Screen_Driver::default_icons(const Fl_RGB_Image *icons[], int count) {
+  [default_icon release];
+  default_icon = nil;
+  if (count >= 1) {
+    default_icon = rgb_to_nsimage(icons[0]);
+  }
+}
 
 //
 // End of "$Id$".

src/drivers/Cocoa/Fl_Cocoa_Screen_Driver.H

@@ -41,6 +41,11 @@
 class Fl_Window;
 class Fl_Input;
 class Fl_RGB_Image;
+#ifdef __OBJC__
+@class NSImage;
+#else
+class NSImage;
+#endif
 
 class FL_EXPORT Fl_Cocoa_Screen_Driver : public Fl_Screen_Driver 
 {
@@ -54,6 +59,7 @@ protected:
   static int insertion_point_height;
   static bool insertion_point_location_is_valid;
 public:
+  NSImage *default_icon;
   Fl_Cocoa_Screen_Driver();
   static int next_marked_length; // next length of marked text after current marked text will have been replaced
   static void breakMacEventLoop();
@@ -100,6 +106,7 @@ public:
   virtual float scale(int n) {return scale_;}
   virtual void scale(int n, float f) { scale_ = f;}
   virtual Fl_RGB_Image *read_win_rectangle(int X, int Y, int w, int h, Fl_Window *win, bool may_capture_subwins, bool *did_capture_subwins);
+  virtual void default_icons(const Fl_RGB_Image *icons[], int count);
 private:
   float scale_;
 };

src/drivers/Cocoa/Fl_Cocoa_Screen_Driver.cxx

@@ -79,6 +79,7 @@ static Fl_Text_Editor::Key_Binding extra_bindings[] =  {
 Fl_Cocoa_Screen_Driver::Fl_Cocoa_Screen_Driver() {
   text_editor_extra_key_bindings =  extra_bindings;
   scale_ = 1.;
+  default_icon = nil;
 }
 
 

src/drivers/Cocoa/Fl_Cocoa_Window_Driver.H

@@ -33,12 +33,14 @@ class Fl_Window;
 #ifdef __OBJC__
 @class CALayer;
 @class NSCursor;
+@class NSImage;
 @class FLWindow;
 @class NSOpenGLContext;
 @class NSOpenGLPixelFormat;
 #else
 class CALayer;
 class NSCursor;
+class NSImage;
 class FLWindow;
 class NSOpenGLContext;
 class NSOpenGLPixelFormat;
@@ -153,6 +155,10 @@ public:
   static void GLcontext_makecurrent(NSOpenGLContext*); // uses Objective-c
   static void GL_cleardrawable(void); // uses Objective-c
   static void gl_start(NSOpenGLContext*); // uses Objective-c
+  
+  //icons
+  virtual void icons(const Fl_RGB_Image *icons[], int count);
+  NSImage *icon_image;
 };
 
 #endif // FL_COCOA_WINDOW_DRIVER_H

src/drivers/Cocoa/Fl_Cocoa_Window_Driver.cxx

@@ -52,17 +52,7 @@ Fl_Cocoa_Window_Driver::Fl_Cocoa_Window_Driver(Fl_Window *win)
 {
   cursor = nil;
   window_flags_ = 0;
-}
-
-
-Fl_Cocoa_Window_Driver::~Fl_Cocoa_Window_Driver()
-{
-  if (shape_data_) {
-    if (shape_data_->mask) {
-      CGImageRelease(shape_data_->mask);
-    }
-    delete shape_data_;
-  }
+  icon_image = NULL;
 }
 
 

test/device.cxx

@@ -754,6 +754,10 @@ int main(int argc, char ** argv) {
   w3->end();
   
   w2->end();
+  Fl_RGB_Image *rgba_icon = new Fl_RGB_Image(pixmap);
+  Fl_Window::default_icon(rgba_icon);
+  //w2->icon(rgba_icon);
+  delete rgba_icon;
   w2->show(argc, argv);
   
   Fl::run();