Added support in Metro mode for retrieving the information about the currently

chrome/browser/ui/views/frame/browser_frame_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 "chrome/browser/ui/views/frame/browser_frame_win.h"
 
 #include <dwmapi.h>
 #include <shellapi.h>
 
 #include <set>
 
 #include "base/command_line.h"
+#include "base/string_util.h"
+#include "base/utf_string_conversions.h"
 #include "base/win/metro.h"
 #include "chrome/app/chrome_command_ids.h"
 #include "chrome/browser/search_engines/template_url.h"
 #include "chrome/browser/search_engines/template_url_service.h"
 #include "chrome/browser/search_engines/template_url_service_factory.h"
 #include "chrome/browser/ui/browser_list.h"
 #include "chrome/browser/ui/toolbar/wrench_menu_model.h"
 #include "chrome/browser/ui/views/frame/browser_view.h"
 #include "chrome/browser/ui/views/frame/system_menu_model.h"
 #include "chrome/browser/ui/views/frame/system_menu_model_delegate.h"
 #include "chrome/common/chrome_constants.h"
 #include "chrome/common/chrome_switches.h"
 #include "content/public/browser/browser_accessibility_state.h"
 #include "content/public/browser/page_navigator.h"
+#include "content/public/browser/web_contents.h"
 #include "content/public/common/page_transition_types.h"
+#include "googleurl/src/gurl.h"
 #include "grit/generated_resources.h"
 #include "grit/theme_resources.h"
 #include "ui/base/models/simple_menu_model.h"
 #include "ui/base/theme_provider.h"
 #include "ui/gfx/font.h"
 #include "ui/views/controls/menu/native_menu_win.h"
 #include "ui/views/views_delegate.h"
 #include "ui/views/widget/native_widget_win.h"
 #include "ui/views/widget/widget.h"
 #include "ui/views/window/non_client_view.h"
 #include "webkit/glue/window_open_disposition.h"
 
 #pragma comment(lib, "dwmapi.lib")
 
 // static
 static const int kClientEdgeThickness = 3;
 static const int kTabDragWindowAlpha = 200;
 // We need to offset the DWMFrame into the toolbar so that the blackness
 // doesn't show up on our rounded corners.
 static const int kDWMFrameTopOffset = 3;
 // If not -1, windows are shown with this state.
 static int explicit_show_state = -1;
 
 using content::OpenURLParams;
 using content::Referrer;
+using content::WebContents;
 
 ///////////////////////////////////////////////////////////////////////////////
 // BrowserFrameWin, public:
 
 BrowserFrameWin::BrowserFrameWin(BrowserFrame* browser_frame,
                                  BrowserView* browser_view)
     : views::NativeWidgetWin(browser_frame),
       browser_view_(browser_view),
       browser_frame_(browser_frame),
       system_menu_delegate_(new SystemMenuModelDelegate(browser_view,
@@ skipping 138 matching lines @@
 
 void BrowserFrameWin::TabStripDisplayModeChanged() {
   UpdateDWMFrame();
 }
 
 LRESULT BrowserFrameWin::OnWndProc(UINT message,
                                    WPARAM w_param,
                                    LPARAM l_param) {
   static const UINT metro_navigation_search_message =
       RegisterWindowMessage(chrome::kMetroNavigationAndSearchMessage);
-  if (message == metro_navigation_search_message)
-    HandleMetroRequest(w_param, l_param);
 
+  static const UINT metro_get_current_tab_info_message =
+      RegisterWindowMessage(chrome::kMetroGetCurrentTabInfoMessage);
+
+  if (message == metro_navigation_search_message) {

[sky, 2012/05/01 23:48:53]

nit: no {}

[ananta, 2012/05/01 23:57:48]

Leaving this as is as this is a compound if statement.

+    HandleMetroNavSearchRequest(w_param, l_param);
+  } else if (message == metro_get_current_tab_info_message) {
+    GetMetroCurrentTabInfo(w_param);
+  }
   return views::NativeWidgetWin::OnWndProc(message, w_param, l_param);
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 // BrowserFrameWin, private:
 
 void BrowserFrameWin::UpdateDWMFrame() {
   // Nothing to do yet, or we're not showing a DWM frame.
   if (!GetWidget()->client_view() || !browser_frame_->ShouldUseNativeFrame())
     return;
@@ skipping 76 matching lines @@
 
 void BrowserFrameWin::AddFrameToggleItems() {
   if (CommandLine::ForCurrentProcess()->HasSwitch(
           switches::kDebugEnableFrameToggle)) {
     system_menu_contents_->AddSeparator();
     system_menu_contents_->AddItem(IDC_DEBUG_FRAME_TOGGLE,
                                    L"Toggle Frame Type");
   }
 }
 
-void BrowserFrameWin::HandleMetroRequest(WPARAM w_param, LPARAM l_param) {
+void BrowserFrameWin::HandleMetroNavSearchRequest(WPARAM w_param,
+                                                  LPARAM l_param) {
   if (!base::win::GetMetroModule()) {
     NOTREACHED() << "Received unexpected metro navigation request";
     return;
   }
 
   if (!w_param && !l_param) {
     NOTREACHED() << "Invalid metro request parameters";
     return;
   }
 
@@ skipping 18 matching lines @@
                             TemplateURLRef::NO_SUGGESTIONS_AVAILABLE,
                             string16()));
     }
   }
   if (request_url.is_valid()) {
     browser->OpenURL(OpenURLParams(request_url, Referrer(), NEW_FOREGROUND_TAB,
                                    content::PAGE_TRANSITION_TYPED, false));
   }
 }
 
+void BrowserFrameWin::GetMetroCurrentTabInfo(WPARAM w_param) {
+  if (!base::win::GetMetroModule()) {
+    NOTREACHED() << "Received unexpected metro request";
+    return;
+  }
+
+  if (!w_param) {
+    NOTREACHED() << "Invalid metro request parameter";
+    return;
+  }
+
+  base::win::CurrentTabInfo* current_tab_info =
+      reinterpret_cast<base::win::CurrentTabInfo*>(w_param);
+
+  Browser* browser = browser_view()->browser();
+  DCHECK(browser);
+
+  // We allocate memory for the title and url via LocalAlloc. The caller has to
+  // free the memory via LocalFree.
+
+  size_t title_size =
+      (browser->GetWindowTitleForCurrentTab().length() + 1) * sizeof(wchar_t);
+
+  current_tab_info->title = reinterpret_cast<wchar_t*>(LocalAlloc(LPTR,
+      title_size));
+
+  base::wcslcpy(current_tab_info->title,
+                browser->GetWindowTitleForCurrentTab().c_str(),
+                title_size);
+
+  WebContents* current_tab = browser->GetSelectedWebContents();
+  DCHECK(current_tab);
+
+  string16 current_url(UTF8ToWide(current_tab->GetURL().spec()));

[sky, 2012/05/01 23:48:53]

381-387 is the same as this. How about a helper function that does this?

[ananta, 2012/05/01 23:57:48]

Done. Added a function LocalAllocAndCopyString in an anonymous namespace in this
file.

+
+  size_t url_size = (current_url.length() + 1) * sizeof(wchar_t);
+
+  current_tab_info->url = reinterpret_cast<wchar_t*>(LocalAlloc(LPTR,
+      url_size));
+
+  base::wcslcpy(current_tab_info->url,
+                current_url.c_str(),
+                url_size);
+}
+
 
 ////////////////////////////////////////////////////////////////////////////////
 // BrowserFrame, public:
 
 // static
 const gfx::Font& BrowserFrame::GetTitleFont() {
   static gfx::Font* title_font =
       new gfx::Font(views::NativeWidgetWin::GetWindowTitleFont());
   return *title_font;
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // NativeBrowserFrame, public:
 
 // static
 NativeBrowserFrame* NativeBrowserFrame::CreateNativeBrowserFrame(
     BrowserFrame* browser_frame,
     BrowserView* browser_view) {
   return new BrowserFrameWin(browser_frame, browser_view);
 }