(Mac) Intercept (Cocoa) cursor setting by plugins and forward it on properly....

webkit/glue/webcursor_mac.mm

 // Copyright (c) 2008 The Chromium Authors. All rights reserved.  Use of this
 // source code is governed by a BSD-style license that can be found in the
 // LICENSE file.
 
 #include "webkit/glue/webcursor.h"
 
 #import <AppKit/AppKit.h>
 #include <Carbon/Carbon.h>
 
 #include "base/logging.h"
 #include "base/nsimage_cache_mac.h"
 #include "base/scoped_cftyperef.h"
 #include "third_party/WebKit/WebKit/chromium/public/WebCursorInfo.h"
 #include "third_party/WebKit/WebKit/chromium/public/WebImage.h"
 #include "third_party/WebKit/WebKit/chromium/public/WebSize.h"
 
 using WebKit::WebCursorInfo;
 using WebKit::WebImage;
 using WebKit::WebSize;
 
 namespace {
 
-// TODO: This image fech can (and probably should) be serviced by the resource
+// TODO: This image fetch can (and probably should) be serviced by the resource
 // resource bundle instead of going through nsimage_cache.
 NSCursor* LoadCursor(const char* name, int x, int y) {
   NSString* file_name = [NSString stringWithUTF8String:name];
   DCHECK(file_name);
   NSImage* cursor_image = nsimage_cache::ImageNamed(file_name);
   DCHECK(cursor_image);
   return [[[NSCursor alloc] initWithImage:cursor_image
                                   hotSpot:NSMakePoint(x, y)] autorelease];
 }
 
 CGImageRef CreateCGImageFromCustomData(const std::vector<char>& custom_data,
                                        const gfx::Size& custom_size) {
   scoped_cftyperef<CGColorSpaceRef> cg_color(CGColorSpaceCreateDeviceRGB());
-  // this is safe since we're not going to draw into the context we're creating
+  // This is safe since we're not going to draw into the context we're creating.
   void* data = const_cast<char*>(&custom_data[0]);
-  // settings here match SetCustomData() below; keep in sync
+  // The settings here match SetCustomData() below; keep in sync.
   scoped_cftyperef<CGContextRef> context(
       CGBitmapContextCreate(data,
                             custom_size.width(),
                             custom_size.height(),
                             8,
                             custom_size.width()*4,
                             cg_color.get(),
                             kCGImageAlphaPremultipliedLast |
                             kCGBitmapByteOrder32Big));
   return CGBitmapContextCreateImage(context.get());
@@ skipping 167 matching lines @@
       break;
     case kThemePoofCursor:  // *shrug*
     default:
       cursor_info.type = WebCursorInfo::TypePointer;
       break;
   }
 
   InitFromCursorInfo(cursor_info);
 }
 
+void WebCursor::InitFromNSCursor(NSCursor* cursor) {
+  WebKit::WebCursorInfo cursor_info;
+
+  if ([cursor isEqual:[NSCursor arrowCursor]]) {
+    cursor_info.type = WebCursorInfo::TypePointer;
+  } else if ([cursor isEqual:[NSCursor IBeamCursor]]) {
+    cursor_info.type = WebCursorInfo::TypeIBeam;
+  } else if ([cursor isEqual:[NSCursor crosshairCursor]]) {
+    cursor_info.type = WebCursorInfo::TypeCross;
+  } else if ([cursor isEqual:[NSCursor pointingHandCursor]]) {
+    cursor_info.type = WebCursorInfo::TypeHand;
+  } else if ([cursor isEqual:[NSCursor resizeLeftCursor]]) {
+    cursor_info.type = WebCursorInfo::TypeWestResize;
+  } else if ([cursor isEqual:[NSCursor resizeRightCursor]]) {
+    cursor_info.type = WebCursorInfo::TypeEastResize;
+  } else if ([cursor isEqual:[NSCursor resizeLeftRightCursor]]) {
+    cursor_info.type = WebCursorInfo::TypeEastWestResize;
+  } else if ([cursor isEqual:[NSCursor resizeUpCursor]]) {
+    cursor_info.type = WebCursorInfo::TypeNorthResize;
+  } else if ([cursor isEqual:[NSCursor resizeDownCursor]]) {
+    cursor_info.type = WebCursorInfo::TypeSouthResize;
+  } else if ([cursor isEqual:[NSCursor resizeUpDownCursor]]) {
+    cursor_info.type = WebCursorInfo::TypeNorthSouthResize;
+  } else {
+    // Also handles the [NSCursor closedHandCursor], [NSCursor openHandCursor],
+    // and [NSCursor disappearingItemCursor] cases. Quick-and-dirty image
+    // conversion; TODO(avi): do better.
+    CGImageRef cg_image = nil;
+    NSImage* image = [cursor image];
+    for (id rep in [image representations]) {
+      if ([rep isKindOfClass:[NSBitmapImageRep class]]) {
+        cg_image = [rep CGImage];
+        break;
+      }
+    }
+
+    if (cg_image) {
+      cursor_info.type = WebCursorInfo::TypeCustom;
+      NSPoint hot_spot = [cursor hotSpot];
+      cursor_info.hotSpot = WebKit::WebPoint(hot_spot.x, hot_spot.y);
+      cursor_info.customImage = cg_image;
+    } else {
+      cursor_info.type = WebCursorInfo::TypePointer;
+    }
+  }
+
+  InitFromCursorInfo(cursor_info);
+}
+
 void WebCursor::SetCustomData(const WebImage& image) {
   if (image.isNull())
     return;
 
   scoped_cftyperef<CGColorSpaceRef> cg_color(
       CGColorSpaceCreateDeviceRGB());
 
   const WebSize& image_dimensions = image.size();
   int image_width = image_dimensions.width;
   int image_height = image_dimensions.height;
@@ skipping 44 matching lines @@
   return true;
 }
 
 void WebCursor::CleanupPlatformData() {
   return;
 }
 
 void WebCursor::CopyPlatformData(const WebCursor& other) {
   return;
 }