ui/views/controls/webview/unhandled_keyboard_event_handler_win.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "ui/views/controls/webview/unhandled_keyboard_event_handler.h"
   6
   7 #include "base/logging.h"
   8 #include "content/public/browser/native_web_keyboard_event.h"
   9 #include "ui/events/event.h"
  10 #include "ui/views/focus/focus_manager.h"
  11
  12 using content::NativeWebKeyboardEvent;
  13
  14 namespace views {
  15
  16 UnhandledKeyboardEventHandler::UnhandledKeyboardEventHandler() {
  17   ignore_next_char_event_ = false;
  18 }
  19
  20 void UnhandledKeyboardEventHandler::HandleKeyboardEvent(
  21     const NativeWebKeyboardEvent& event,
  22     FocusManager* focus_manager) {
  23   if (!focus_manager) {
  24     NOTREACHED();
  25     return;
  26   }
  27   // Previous calls to TranslateMessage can generate Char events as well as
  28   // RawKeyDown events, even if the latter triggered an accelerator.  In these
  29   // cases, we discard the Char events.
  30   if (event.type == blink::WebInputEvent::Char && ignore_next_char_event_) {
  31     ignore_next_char_event_ = false;
  32     return;
  33   }
  34   // It's necessary to reset this flag, because a RawKeyDown event may not
  35   // always generate a Char event.
  36   ignore_next_char_event_ = false;
  37
  38   if (event.type == blink::WebInputEvent::RawKeyDown) {
  39     ui::Accelerator accelerator(
  40         static_cast<ui::KeyboardCode>(event.windowsKeyCode),
  41         content::GetModifiersFromNativeWebKeyboardEvent(event));
  42
  43     // This is tricky: we want to set ignore_next_char_event_ if
  44     // ProcessAccelerator returns true. But ProcessAccelerator might delete
  45     // |this| if the accelerator is a "close tab" one. So we speculatively
  46     // set the flag and fix it if no event was handled.
  47     ignore_next_char_event_ = true;
  48
  49     if (focus_manager->ProcessAccelerator(accelerator)) {
  50       return;
  51     }
  52
  53     // ProcessAccelerator didn't handle the accelerator, so we know both
  54     // that |this| is still valid, and that we didn't want to set the flag.
  55     ignore_next_char_event_ = false;
  56   }
  57
  58   // Any unhandled keyboard/character messages should be defproced.
  59   // This allows stuff like F10, etc to work correctly.
  60   if (!event.os_event)
  61     return;
  62   const MSG& message(event.os_event->native_event());
  63   DefWindowProc(message.hwnd, message.message, message.wParam, message.lParam);
  64 }
  65
  66 }  // namespace views