mac: Basic HighDPI implementation for web contents.

ui/gfx/screen_mac.mm

 // Copyright (c) 2012 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 "ui/gfx/screen.h"
 
 #import <ApplicationServices/ApplicationServices.h>
 #import <Cocoa/Cocoa.h>
 
 @interface NSScreen (LionAPI)
@@ skipping 71 matching lines @@
 // static
 gfx::Point Screen::GetCursorScreenPoint() {
   NSPoint mouseLocation  = [NSEvent mouseLocation];
   // Flip coordinates to gfx (0,0 in top-left corner) using primary screen.
   NSScreen* screen = [[NSScreen screens] objectAtIndex:0];
   mouseLocation.y = NSMaxY([screen frame]) - mouseLocation.y;
   return gfx::Point(mouseLocation.x, mouseLocation.y);
 }
 
 // static
+gfx::Monitor Screen::GetMonitorNearestWindow(gfx::NativeView view) {

[Avi (use Gerrit), 2012/06/08 14:41:43]

GetMonitorNearestWindow takes a view!?

[Nico, 2012/06/08 14:43:05]

Yeah :-/

+  NSWindow* window = [view window];
+  if (!window)
+    return GetPrimaryMonitor();
+  NSScreen* match_screen = [window screen];
+  return GetMonitorForScreen(match_screen, false /* may not be primary */);
+}
+
+// static
 gfx::Monitor Screen::GetPrimaryMonitor() {
   // Primary monitor is defined as the monitor with the menubar,
   // which is always at index 0.
   NSScreen* primary = [[NSScreen screens] objectAtIndex:0];
   gfx::Monitor monitor = GetMonitorForScreen(primary, true /* primary */);
   return monitor;
 }
 
 // static
 gfx::Monitor Screen::GetMonitorMatching(const gfx::Rect& match_rect) {
@@ skipping 30 matching lines @@
       // The primary display in a mirrored set will be counted, but those that
       // mirror it will not be.
       ++display_count;
     }
   }
 
   return display_count;
 }
 
 }  // namespace gfx