Fix Ash on Windows multi-monitor support and snap-view sizing.

win8/metro_driver/chrome_app_view_ash.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 "win8/metro_driver/stdafx.h"
 #include "win8/metro_driver/chrome_app_view_ash.h"
 
 #include <corewindow.h>
 #include <windows.foundation.h>
 
@@ skipping 36 matching lines @@
     winui::Core::CharacterReceivedEventArgs*> CharEventHandler;
 
 typedef winfoundtn::ITypedEventHandler<
     winui::Core::CoreWindow*,
     winui::Core::VisibilityChangedEventArgs*> VisibilityChangedHandler;
 
 typedef winfoundtn::ITypedEventHandler<
     winui::Core::CoreWindow*,
     winui::Core::WindowActivatedEventArgs*> WindowActivatedHandler;
 
+typedef winfoundtn::ITypedEventHandler<
+    winui::Core::CoreWindow*,
+    winui::Core::WindowSizeChangedEventArgs*> SizeChangedHandler;
+
 // This function is exported by chrome.exe.
 typedef int (__cdecl *BreakpadExceptionHandler)(EXCEPTION_POINTERS* info);
 
 // Global information used across the metro driver.
 struct Globals {
   winapp::Activation::ApplicationExecutionState previous_state;
   winapp::Core::ICoreApplicationExit* app_exit;
   BreakpadExceptionHandler breakpad_exception_handler;
 } globals;
 
@@ skipping 252 matching lines @@
   window_ = window;
   DVLOG(1) << __FUNCTION__;
 
   // Retrieve the native window handle via the interop layer.
   mswr::ComPtr<ICoreWindowInterop> interop;
   HRESULT hr = window->QueryInterface(interop.GetAddressOf());
   CheckHR(hr);
   hr = interop->get_WindowHandle(&core_window_hwnd_);
   CheckHR(hr);
 
+  hr = window_->add_SizeChanged(mswr::Callback<SizeChangedHandler>(
+      this, &ChromeAppViewAsh::OnSizeChanged).Get(),
+      &sizechange_token_);
+  CheckHR(hr);
+
   // Register for pointer and keyboard notifications. We forward
   // them to the browser process via IPC.
   hr = window_->add_PointerMoved(mswr::Callback<PointerEventHandler>(
       this, &ChromeAppViewAsh::OnPointerMoved).Get(),
       &pointermoved_token_);
   CheckHR(hr);
 
   hr = window_->add_PointerPressed(mswr::Callback<PointerEventHandler>(
       this, &ChromeAppViewAsh::OnPointerPressed).Get(),
       &pointerpressed_token_);
@@ skipping 102 matching lines @@
                                &ui_channel_listener,
                                io_thread.message_loop_proxy());
   ui_channel_ = &ui_channel;
 
   // Upon receipt of the MetroViewerHostMsg_SetTargetSurface message the
   // browser will use D3D from the browser process to present to our Window.
   ui_channel_->Send(new MetroViewerHostMsg_SetTargetSurface(
                     gfx::NativeViewId(core_window_hwnd_)));
   DVLOG(1) << "ICoreWindow sent " << core_window_hwnd_;
 
+  // Send an initial size message so that the Ash root window host gets sized
+  // correctly.
+  RECT rect = {0};
+  ::GetWindowRect(core_window_hwnd_, &rect);
+  ui_channel_->Send(
+      new MetroViewerHostMsg_WindowSizeChanged(rect.right - rect.left,
+                                               rect.bottom - rect.top));
+
   // And post the task that'll do the inner Metro message pumping to it.
   msg_loop.PostTask(FROM_HERE, base::Bind(&RunMessageLoop, dispatcher.Get()));
   msg_loop.Run();
 
   DVLOG(0) << "ProcessEvents done, hr=" << hr;
   return hr;
 }
 
 IFACEMETHODIMP
 ChromeAppViewAsh::Uninitialize() {
@@ skipping 362 matching lines @@
   winui::Core::CoreWindowActivationState state;
   HRESULT hr = args->get_WindowActivationState(&state);
   if (FAILED(hr))
     return hr;
   DVLOG(1) << "Window activation state: "  << state;
   ui_channel_->Send(new MetroViewerHostMsg_WindowActivated(
       state != winui::Core::CoreWindowActivationState_Deactivated));
   return S_OK;
 }
 
+HRESULT ChromeAppViewAsh::OnSizeChanged(winui::Core::ICoreWindow* sender,
+    winui::Core::IWindowSizeChangedEventArgs* args) {
+  if (!window_) {
+    return S_OK;
+  }
+
+  winfoundtn::Size size;
+  HRESULT hr = args->get_Size(&size);
+  if (FAILED(hr))
+    return hr;
+
+  int32 cx = static_cast<int32>(size.Width);
+  int32 cy = static_cast<int32>(size.Height);
+
+  DVLOG(1) << "Window size changed: width=" << cx << ", height=" << cy;
+  ui_channel_->Send(new MetroViewerHostMsg_WindowSizeChanged(cx, cy));
+  return S_OK;
+}
+
 
 ///////////////////////////////////////////////////////////////////////////////
 
 ChromeAppViewFactory::ChromeAppViewFactory(
     winapp::Core::ICoreApplication* icore_app,
     LPTHREAD_START_ROUTINE host_main,
     void* host_context) {
   mswr::ComPtr<winapp::Core::ICoreApplication> core_app(icore_app);
   mswr::ComPtr<winapp::Core::ICoreApplicationExit> app_exit;
   CheckHR(core_app.As(&app_exit));
   globals.app_exit = app_exit.Detach();
 }
 
 IFACEMETHODIMP
 ChromeAppViewFactory::CreateView(winapp::Core::IFrameworkView** view) {
   *view = mswr::Make<ChromeAppViewAsh>().Detach();
   return (*view) ? S_OK :  E_OUTOFMEMORY;
 }