Copy remoting notification bar to chrome and use it for screen capture API.

chrome/browser/ui/screen_capture_notification_ui_win.cc

-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Copyright 2013 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 "remoting/host/disconnect_window.h"
+#include "chrome/browser/ui/screen_capture_notification_ui.h"
 
 #include <windows.h>
 
 #include "base/compiler_specific.h"
+#include "base/i18n/rtl.h"
 #include "base/logging.h"
 #include "base/process_util.h"
 #include "base/string_util.h"
 #include "base/utf_string_conversions.h"
 #include "base/win/scoped_gdi_object.h"
 #include "base/win/scoped_hdc.h"
 #include "base/win/scoped_select_object.h"
-#include "remoting/host/ui_strings.h"
-#include "remoting/host/win/core_resource.h"
-
-// TODO(garykac): Lots of duplicated code in this file and
-// continue_window_win.cc. If we need to expand this then we should
-// create a class with the shared code.
+#include "chrome/app/chrome_dll_resource.h"
+#include "grit/generated_resources.h"
+#include "ui/base/l10n/l10n_util.h"
 
 namespace {
 
-const int DISCONNECT_HOTKEY_ID = 1000;
-
 // Maximum length of "Your desktop is shared with ..." message in UTF-16
 // characters.
 const size_t kMaxSharingWithTextLength = 100;
 
 const wchar_t kShellTrayWindowName[] = L"Shell_TrayWnd";
 const int kWindowBorderRadius = 14;
 
 } // namespace anonymous
 
-namespace remoting {
+class ScreenCaptureNotificationUIWin : public ScreenCaptureNotificationUI {
+ public:
+  ScreenCaptureNotificationUIWin();
+  virtual ~ScreenCaptureNotificationUIWin();
 
-class DisconnectWindowWin : public DisconnectWindow {
- public:
-  explicit DisconnectWindowWin(const UiStrings* ui_strings);
-  virtual ~DisconnectWindowWin();
+  // ScreenCaptureNotificationUI interface.
+  virtual bool Show(const base::Closure& stop_callback,
+                    const string16& title) OVERRIDE;
 
-  // DisconnectWindow interface.
-  virtual bool Show(const base::Closure& disconnect_callback,
-                    const std::string& username) OVERRIDE;
-  virtual void Hide() OVERRIDE;
-
-private:
+ private:
   static INT_PTR CALLBACK DialogProc(HWND hwnd, UINT message, WPARAM wparam,
                                      LPARAM lparam);
 
   BOOL OnDialogMessage(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam);
 
-  // Creates the dialog window and registers the disconnect hot key.
-  bool BeginDialog(const std::string& username);
+  // Creates the dialog window.
+  bool BeginDialog(const string16& title);
 
-  // Closes the dialog, unregisters the hot key and invokes the disconnect
-  // callback, if set.
+  // Closes the dialog and invokes the disconnect callback, if set.
   void EndDialog();
 
   // Trys to position the dialog window above the taskbar.
   void SetDialogPosition();
 
   // Applies localization string and resizes the dialog.
-  bool SetStrings(const string16& username);
+  bool UpdateStrings(const string16& title);
 
-  base::Closure disconnect_callback_;
+  base::Closure stop_callback_;
   HWND hwnd_;
-  bool has_hotkey_;
   base::win::ScopedGDIObject<HPEN> border_pen_;
 
-  // Points to the localized strings.
-  const UiStrings* ui_strings_;
-
-  DISALLOW_COPY_AND_ASSIGN(DisconnectWindowWin);
+  DISALLOW_COPY_AND_ASSIGN(ScreenCaptureNotificationUIWin);
 };
 
 static int GetControlTextWidth(HWND control) {
   RECT rect = {0, 0, 0, 0};
   WCHAR text[256];
   int result = GetWindowText(control, text, arraysize(text));
   if (result) {
     base::win::ScopedGetDC dc(control);
     base::win::ScopedSelectObject font(
         dc, (HFONT)SendMessage(control, WM_GETFONT, 0, 0));
     DrawText(dc, text, -1, &rect, DT_CALCRECT | DT_SINGLELINE);
   }
   return rect.right;
 }
 
-DisconnectWindowWin::DisconnectWindowWin(const UiStrings* ui_strings)
+ScreenCaptureNotificationUIWin::ScreenCaptureNotificationUIWin()
     : hwnd_(NULL),
-      has_hotkey_(false),
       border_pen_(CreatePen(PS_SOLID, 5,
-                            RGB(0.13 * 255, 0.69 * 255, 0.11 * 255))),
-      ui_strings_(ui_strings) {
+                            RGB(0.13 * 255, 0.69 * 255, 0.11 * 255))) {
 }
 
-DisconnectWindowWin::~DisconnectWindowWin() {
-  Hide();
+ScreenCaptureNotificationUIWin::~ScreenCaptureNotificationUIWin() {
+  stop_callback_.Reset();
+  EndDialog();
 }
 
-bool DisconnectWindowWin::Show(const base::Closure& disconnect_callback,
-                               const std::string& username) {
-  DCHECK(disconnect_callback_.is_null());
-  DCHECK(!disconnect_callback.is_null());
+bool ScreenCaptureNotificationUIWin::Show(
+    const base::Closure& stop_callback,
+    const string16& title) {
+  DCHECK(stop_callback_.is_null());
+  DCHECK(!stop_callback.is_null());
 
-  disconnect_callback_ = disconnect_callback;
+  stop_callback_ = stop_callback;
 
-  if (BeginDialog(username)) {
+  if (BeginDialog(title)) {
     return true;
   } else {
-    Hide();
+    stop_callback_ = stop_callback;
+    EndDialog();
     return false;
   }
 }
 
-void DisconnectWindowWin::Hide() {
-  // Clear the |disconnect_callback_| so it won't be invoked by EndDialog().
-  disconnect_callback_.Reset();
-  EndDialog();
-}
-
-INT_PTR CALLBACK DisconnectWindowWin::DialogProc(HWND hwnd, UINT message,
-                                                 WPARAM wparam, LPARAM lparam) {
+INT_PTR CALLBACK ScreenCaptureNotificationUIWin::DialogProc(
+    HWND hwnd, UINT message,
+    WPARAM wparam, LPARAM lparam) {
   LONG_PTR self = NULL;
   if (message == WM_INITDIALOG) {
     self = lparam;
 
     // Store |this| to the window's user data.
     SetLastError(ERROR_SUCCESS);
     LONG_PTR result = SetWindowLongPtr(hwnd, DWLP_USER, self);
     if (result == 0 && GetLastError() != ERROR_SUCCESS)
-      reinterpret_cast<DisconnectWindowWin*>(self)->EndDialog();
+      reinterpret_cast<ScreenCaptureNotificationUIWin*>(self)->EndDialog();
   } else {
     self = GetWindowLongPtr(hwnd, DWLP_USER);
   }
 
   if (self) {
-    return reinterpret_cast<DisconnectWindowWin*>(self)->OnDialogMessage(
-        hwnd, message, wparam, lparam);
+    return reinterpret_cast<ScreenCaptureNotificationUIWin*>(self)->
+        OnDialogMessage(hwnd, message, wparam, lparam);
   }
   return FALSE;
 }
 
-BOOL DisconnectWindowWin::OnDialogMessage(HWND hwnd, UINT message,
+BOOL ScreenCaptureNotificationUIWin::OnDialogMessage(HWND hwnd, UINT message,
                                           WPARAM wparam, LPARAM lparam) {
   switch (message) {
     // Ignore close messages.
     case WM_CLOSE:
       return TRUE;
 
-    // Handle the Disconnect button.
+    // Handle the Stop button.
     case WM_COMMAND:
       switch (LOWORD(wparam)) {
-        case IDC_DISCONNECT:
+        case IDC_SCREEN_CAPTURE_STOP:
           EndDialog();
           return TRUE;
       }
       return FALSE;
 
     // Ensure we don't try to use the HWND anymore.
     case WM_DESTROY:
       hwnd_ = NULL;
 
-      // Ensure that the disconnect callback is invoked even if somehow our
-      // window gets destroyed.
+      // Ensure that the stop callback is invoked even if somehow our window
+      // gets destroyed.
       EndDialog();
 
       return TRUE;
 
     // Ensure the dialog stays visible if the work area dimensions change.
     case WM_SETTINGCHANGE:
       if (wparam == SPI_SETWORKAREA)
         SetDialogPosition();
       return TRUE;
 
     // Ensure the dialog stays visible if the display dimensions change.
     case WM_DISPLAYCHANGE:
       SetDialogPosition();
       return TRUE;
 
-    // Handle the disconnect hot-key.
-    case WM_HOTKEY:
-      EndDialog();
-      return TRUE;
-
     // Let the window be draggable by its client area by responding
     // that the entire window is the title bar.
     case WM_NCHITTEST:
       SetWindowLongPtr(hwnd, DWLP_MSGRESULT, HTCAPTION);
       return TRUE;
 
     case WM_PAINT: {
       PAINTSTRUCT ps;
       HDC hdc = BeginPaint(hwnd_, &ps);
       RECT rect;
       GetClientRect(hwnd_, &rect);
       {
         base::win::ScopedSelectObject border(hdc, border_pen_);
         base::win::ScopedSelectObject brush(hdc, GetStockObject(NULL_BRUSH));
         RoundRect(hdc, rect.left, rect.top, rect.right - 1, rect.bottom - 1,
                   kWindowBorderRadius, kWindowBorderRadius);
       }
       EndPaint(hwnd_, &ps);
       return TRUE;
     }
   }
   return FALSE;
 }
 
-bool DisconnectWindowWin::BeginDialog(const std::string& username) {
+bool ScreenCaptureNotificationUIWin::BeginDialog(const string16& title) {
   DCHECK(!hwnd_);
 
+  // TODO(sergeyu): Currently this code relies on resources for the dialog. Fix
+  // it to work without resources.
+
   // Load the dialog resource so that we can modify the RTL flags if necessary.
   HMODULE module = base::GetModuleFromAddress(&DialogProc);
-  HRSRC dialog_resource =
-      FindResource(module, MAKEINTRESOURCE(IDD_DISCONNECT), RT_DIALOG);
+  HRSRC dialog_resource = FindResource(
+      module, MAKEINTRESOURCE(IDD_SCREEN_CAPTURE_NOTIFICATION), RT_DIALOG);
   if (!dialog_resource)
     return false;
 
   HGLOBAL dialog_template = LoadResource(module, dialog_resource);
   if (!dialog_template)
     return false;
 
   DLGTEMPLATE* dialog_pointer =
       reinterpret_cast<DLGTEMPLATE*>(LockResource(dialog_template));
   if (!dialog_pointer)
     return false;
 
   // The actual resource type is DLGTEMPLATEEX, but this is not defined in any
   // standard headers, so we treat it as a generic pointer and manipulate the
   // correct offsets explicitly.
   scoped_array<unsigned char> rtl_dialog_template;
-  if (ui_strings_->direction == UiStrings::RTL) {
+  if (base::i18n::IsRTL()) {
     unsigned long dialog_template_size =
         SizeofResource(module, dialog_resource);
     rtl_dialog_template.reset(new unsigned char[dialog_template_size]);
     memcpy(rtl_dialog_template.get(), dialog_pointer, dialog_template_size);
     DWORD* rtl_dwords = reinterpret_cast<DWORD*>(rtl_dialog_template.get());
     rtl_dwords[2] |= (WS_EX_LAYOUTRTL | WS_EX_RTLREADING);
     dialog_pointer = reinterpret_cast<DLGTEMPLATE*>(rtl_dwords);
   }
 
   hwnd_ = CreateDialogIndirectParam(module, dialog_pointer, NULL,
                                     DialogProc, reinterpret_cast<LPARAM>(this));
   if (!hwnd_)
     return false;
 
-  // Set up handler for Ctrl-Alt-Esc shortcut.
-  if (!has_hotkey_ && RegisterHotKey(hwnd_, DISCONNECT_HOTKEY_ID,
-                                     MOD_ALT | MOD_CONTROL, VK_ESCAPE)) {
-    has_hotkey_ = true;
-  }
-
-  if (!SetStrings(UTF8ToUTF16(username)))
+  if (!UpdateStrings(title))
     return false;
 
   SetDialogPosition();
   ShowWindow(hwnd_, SW_SHOW);
   return IsWindowVisible(hwnd_) != FALSE;
 }
 
-void DisconnectWindowWin::EndDialog() {
-  if (has_hotkey_) {
-    UnregisterHotKey(hwnd_, DISCONNECT_HOTKEY_ID);
-    has_hotkey_ = false;
-  }
-
+void ScreenCaptureNotificationUIWin::EndDialog() {
   if (hwnd_) {
     DestroyWindow(hwnd_);
     hwnd_ = NULL;
   }
 
-  if (!disconnect_callback_.is_null()) {
-    disconnect_callback_.Run();
-    disconnect_callback_.Reset();
+  if (!stop_callback_.is_null()) {
+    stop_callback_.Run();
+    stop_callback_.Reset();
   }
 }
 
-void DisconnectWindowWin::SetDialogPosition() {
+void ScreenCaptureNotificationUIWin::SetDialogPosition() {
   // Try to center the window above the task-bar. If that fails, use the
   // primary monitor. If that fails (very unlikely), use the default position.
   HWND taskbar = FindWindow(kShellTrayWindowName, NULL);
   HMONITOR monitor = MonitorFromWindow(taskbar, MONITOR_DEFAULTTOPRIMARY);
   MONITORINFO monitor_info = {sizeof(monitor_info)};
   RECT window_rect;
   if (GetMonitorInfo(monitor, &monitor_info) &&
       GetWindowRect(hwnd_, &window_rect)) {
     int window_width = window_rect.right - window_rect.left;
     int window_height = window_rect.bottom - window_rect.top;
     int top = monitor_info.rcWork.bottom - window_height;
     int left = (monitor_info.rcWork.right + monitor_info.rcWork.left -
         window_width) / 2;
     SetWindowPos(hwnd_, NULL, left, top, 0, 0, SWP_NOSIZE | SWP_NOZORDER);
   }
 }
 
-bool DisconnectWindowWin::SetStrings(const string16& username) {
-  if (!SetWindowText(hwnd_, ui_strings_->product_name.c_str()))
+bool ScreenCaptureNotificationUIWin::UpdateStrings(const string16& title) {
+  string16 window_title =
+      l10n_util::GetStringFUTF16(IDS_MEDIA_SCREEN_CAPTURE_NOTIFICATION_TITLE,
+                                 title);
+  if (!SetWindowText(hwnd_, window_title.c_str()))
     return false;
 
   // Localize the disconnect button text and measure length of the old and new
   // labels.
-  HWND disconnect_button = GetDlgItem(hwnd_, IDC_DISCONNECT);
-  if (!disconnect_button)
+  HWND stop_button = GetDlgItem(hwnd_, IDC_SCREEN_CAPTURE_STOP);
+  if (!stop_button)
     return false;
-  int button_old_required_width = GetControlTextWidth(disconnect_button);
-  if (!SetWindowText(disconnect_button,
-                     ui_strings_->disconnect_button_text.c_str())) {
+  int button_old_required_width = GetControlTextWidth(stop_button);
+  string16 button_label =
+      l10n_util::GetStringUTF16(IDS_MEDIA_SCREEN_CAPTURE_NOTIFICATION_STOP);
+  if (!SetWindowText(stop_button, button_label.c_str()))
     return false;
-  }
-  int button_new_required_width = GetControlTextWidth(disconnect_button);
+  int button_new_required_width = GetControlTextWidth(stop_button);
   int button_width_delta =
       button_new_required_width - button_old_required_width;
 
   // Format and truncate "Your desktop is shared with ..." message.
-  string16 text = ReplaceStringPlaceholders(ui_strings_->disconnect_message,
-                                            username, NULL);
+
+  string16 text = l10n_util::GetStringFUTF16(
+      IDS_MEDIA_SCREEN_CAPTURE_NOTIFICATION_TEXT, title);
   if (text.length() > kMaxSharingWithTextLength)
     text.erase(kMaxSharingWithTextLength);
 
   // Set localized and truncated "Your desktop is shared with ..." message and
   // measure length of the old and new text.
-  HWND sharing_with_label = GetDlgItem(hwnd_, IDC_DISCONNECT_SHARINGWITH);
+  HWND sharing_with_label = GetDlgItem(hwnd_, IDC_SCREEN_CAPTURE_TEXT);
   if (!sharing_with_label)
     return false;
   int label_old_required_width = GetControlTextWidth(sharing_with_label);
   if (!SetWindowText(sharing_with_label, text.c_str()))
     return false;
   int label_new_required_width = GetControlTextWidth(sharing_with_label);
   int label_width_delta = label_new_required_width - label_old_required_width;
 
   // Reposition the controls such that the label lies to the left of the
   // disconnect button (assuming LTR layout). The dialog template determines
   // the controls' spacing; update their size to fit the localized content.
   RECT label_rect;
   if (!GetClientRect(sharing_with_label, &label_rect))
     return false;
   if (!SetWindowPos(sharing_with_label, NULL, 0, 0,
                     label_rect.right + label_width_delta, label_rect.bottom,
                     SWP_NOMOVE | SWP_NOZORDER)) {
     return false;
   }
 
   // Reposition the disconnect button as well.
   RECT button_rect;
-  if (!GetWindowRect(disconnect_button, &button_rect))
+  if (!GetWindowRect(stop_button, &button_rect))
     return false;
   int button_width = button_rect.right - button_rect.left;
   int button_height = button_rect.bottom - button_rect.top;
   SetLastError(ERROR_SUCCESS);
   int result = MapWindowPoints(HWND_DESKTOP, hwnd_,
                                reinterpret_cast<LPPOINT>(&button_rect), 2);
   if (!result && GetLastError() != ERROR_SUCCESS)
     return false;
-  if (!SetWindowPos(disconnect_button, NULL,
+  if (!SetWindowPos(stop_button, NULL,
                     button_rect.left + label_width_delta, button_rect.top,
                     button_width + button_width_delta, button_height,
                     SWP_NOZORDER)) {
     return false;
   }
 
   // Resize the whole window to fit the resized controls.
   RECT window_rect;
   if (!GetWindowRect(hwnd_, &window_rect))
     return false;
   int width = (window_rect.right - window_rect.left) +
       button_width_delta + label_width_delta;
   int height = window_rect.bottom - window_rect.top;
   if (!SetWindowPos(hwnd_, NULL, 0, 0, width, height,
                     SWP_NOMOVE | SWP_NOZORDER)) {
     return false;
   }
 
   // Make the corners of the disconnect window rounded.
   HRGN rgn = CreateRoundRectRgn(0, 0, width, height, kWindowBorderRadius,
                                 kWindowBorderRadius);
   if (!rgn)
     return false;
   if (!SetWindowRgn(hwnd_, rgn, TRUE))
     return false;
 
   return true;
 }
 
-scoped_ptr<DisconnectWindow> DisconnectWindow::Create(
-    const UiStrings* ui_strings) {
-  return scoped_ptr<DisconnectWindow>(new DisconnectWindowWin(ui_strings));
+scoped_ptr<ScreenCaptureNotificationUI> ScreenCaptureNotificationUI::Create() {
+  return scoped_ptr<ScreenCaptureNotificationUI>(
+      new ScreenCaptureNotificationUIWin());
 }
-
-}  // namespace remoting