Custom frame UI for platform apps on Windows.

content/browser/renderer_host/render_widget_host_view_win.cc

 // 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 "content/browser/renderer_host/render_widget_host_view_win.h"
 
 #include <algorithm>
 #include <peninputpanel_i.c>
 
 #include "base/bind.h"
@@ skipping 36 matching lines @@
 #include "ui/base/ime/composition_text.h"
 #include "ui/base/l10n/l10n_util_win.h"
 #include "ui/base/text/text_elider.h"
 #include "ui/base/view_prop.h"
 #include "ui/base/win/hwnd_util.h"
 #include "ui/base/win/mouse_wheel_util.h"
 #include "ui/gfx/canvas.h"
 #include "ui/gfx/canvas_skia.h"
 #include "ui/gfx/gdi_util.h"
 #include "ui/gfx/rect.h"
+#include "ui/gfx/scoped_sk_region.h"
 #include "ui/gfx/screen.h"
 #include "webkit/glue/webaccessibility.h"
 #include "webkit/glue/webcursor.h"
 #include "webkit/plugins/npapi/plugin_constants_win.h"
 #include "webkit/plugins/npapi/webplugin.h"
 #include "webkit/plugins/npapi/webplugin_delegate_impl.h"
 
 using base::TimeDelta;
 using base::TimeTicks;
 using content::BrowserThread;
@@ skipping 259 matching lines @@
       is_loading_(false),
       text_input_type_(ui::TEXT_INPUT_TYPE_NONE),
       is_fullscreen_(false),
       ignore_mouse_movement_(true),
       composition_range_(ui::Range::InvalidRange()),
       ignore_next_lbutton_message_at_same_location(false),
       last_pointer_down_location_(0),
       touch_state_(this),
       pointer_down_context_(false),
       focus_on_editable_field_(false),
-      received_focus_change_after_pointer_down_(false) {
+      received_focus_change_after_pointer_down_(false),
+      transparent_region_(0) {
   render_widget_host_->SetView(this);
   registrar_.Add(this,
                  content::NOTIFICATION_RENDERER_PROCESS_TERMINATED,
                  content::NotificationService::AllBrowserContextsAndSources());
   registrar_.Add(this,
                  content::NOTIFICATION_FOCUS_CHANGED_IN_PAGE,
                  content::NotificationService::AllBrowserContextsAndSources());
 }
 
 RenderWidgetHostViewWin::~RenderWidgetHostViewWin() {
@@ skipping 794 matching lines @@
     HBRUSH white_brush = reinterpret_cast<HBRUSH>(GetStockObject(WHITE_BRUSH));
     dc->FillRect(&dirty_rect, white_brush);
   }
 }
 
 void RenderWidgetHostViewWin::OnNCPaint(HRGN update_region) {
   // Do nothing.  This suppresses the resize corner that Windows would
   // otherwise draw for us.
 }
 
+void RenderWidgetHostViewWin::SetTransparentRegion(SkRegion* region) {
+  if (transparent_region_.Get())
+    transparent_region_.release();

[sail, 2012/02/24 04:19:09]

quick question, why do you need to do a release here? Won't this cause a memory
leak?

+  transparent_region_.Set(region);
+}
+
+LRESULT RenderWidgetHostViewWin::OnNCHitTest(const CPoint& point) {
+  RECT rc;
+  GetWindowRect(&rc);
+  if (transparent_region_.Get() &&
+      transparent_region_.Get()->contains(point.x - rc.left,
+                                          point.y - rc.top)) {
+    SetMsgHandled(TRUE);
+    return HTTRANSPARENT;
+  }
+  SetMsgHandled(FALSE);
+  return 0;
+}
+
 LRESULT RenderWidgetHostViewWin::OnEraseBkgnd(HDC dc) {
   return 1;
 }
 
 LRESULT RenderWidgetHostViewWin::OnSetCursor(HWND window, UINT hittest_code,
                                              UINT mouse_message_id) {
   UpdateCursorIfOverSelf();
   return 0;
 }
 
@@ skipping 1440 matching lines @@
 void RenderWidgetHostViewWin::ResetPointerDownContext() {
   // If the default focus on the page is on an edit field and we did not
   // receive a focus change in the context of a pointer down message, it means
   // that the pointer down message occurred on the edit field and we should
   // display the on screen keyboard
   if (!received_focus_change_after_pointer_down_ && virtual_keyboard_)
     DisplayOnScreenKeyboardIfNeeded();
   received_focus_change_after_pointer_down_ = false;
   pointer_down_context_ = false;
 }