ui/views/controls/webview/unhandled_keyboard_event_handler.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 "content/public/browser/native_web_keyboard_event.h"
   8 #include "ui/views/focus/focus_manager.h"
   9
  10 namespace views {
  11
  12 UnhandledKeyboardEventHandler::UnhandledKeyboardEventHandler()
  13     : ignore_next_char_event_(false) {
  14 }
  15
  16 UnhandledKeyboardEventHandler::~UnhandledKeyboardEventHandler() {
  17 }
  18
  19 void UnhandledKeyboardEventHandler::HandleKeyboardEvent(
  20     const content::NativeWebKeyboardEvent& event,
  21     FocusManager* focus_manager) {
  22   if (!focus_manager) {
  23     NOTREACHED();
  24     return;
  25   }
  26   // Previous calls to TranslateMessage can generate Char events as well as
  27   // RawKeyDown events, even if the latter triggered an accelerator.  In these
  28   // cases, we discard the Char events.
  29   if (event.type == blink::WebInputEvent::Char && ignore_next_char_event_) {
  30     ignore_next_char_event_ = false;
  31     return;
  32   }
  33   // It's necessary to reset this flag, because a RawKeyDown event may not
  34   // always generate a Char event.
  35   ignore_next_char_event_ = false;
  36
  37   if (event.type == blink::WebInputEvent::RawKeyDown) {
  38     ui::Accelerator accelerator(
  39         static_cast<ui::KeyboardCode>(event.windowsKeyCode),
  40         content::GetModifiersFromNativeWebKeyboardEvent(event));
  41
  42     // This is tricky: we want to set ignore_next_char_event_ if
  43     // ProcessAccelerator returns true. But ProcessAccelerator might delete
  44     // |this| if the accelerator is a "close tab" one. So we speculatively
  45     // set the flag and fix it if no event was handled.
  46     ignore_next_char_event_ = true;
  47
  48     if (focus_manager->ProcessAccelerator(accelerator)) {
  49       return;
  50     }
  51
  52     // ProcessAccelerator didn't handle the accelerator, so we know both
  53     // that |this| is still valid, and that we didn't want to set the flag.
  54     ignore_next_char_event_ = false;
  55   }
  56
  57   if (event.os_event && !event.skip_in_browser)
  58     HandleNativeKeyboardEvent(event.os_event, focus_manager);
  59 }
  60
  61 }  // namespace views