ui/views/controls/webview/unhandled_keyboard_event_handler_linux.cc

   1 // Copyright 2013 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
  28   // Previous calls to TranslateMessage can generate Char events as well as
  29   // RawKeyDown events, even if the latter triggered an accelerator.  In these
  30   // cases, we discard the Char events.
  31   if (event.type == blink::WebInputEvent::Char && ignore_next_char_event_) {
  32     ignore_next_char_event_ = false;
  33     return;
  34   }
  35   // It's necessary to reset this flag, because a RawKeyDown event may not
  36   // always generate a Char event.
  37   ignore_next_char_event_ = false;
  38
  39   if (event.type == blink::WebInputEvent::RawKeyDown) {
  40     ui::Accelerator accelerator(
  41         static_cast<ui::KeyboardCode>(event.windowsKeyCode),
  42         content::GetModifiersFromNativeWebKeyboardEvent(event));
  43
  44     // This is tricky: we want to set ignore_next_char_event_ if
  45     // ProcessAccelerator returns true. But ProcessAccelerator might delete
  46     // |this| if the accelerator is a "close tab" one. So we speculatively
  47     // set the flag and fix it if no event was handled.
  48     ignore_next_char_event_ = true;
  49
  50     if (focus_manager->ProcessAccelerator(accelerator)) {
  51       return;
  52     }
  53
  54     // ProcessAccelerator didn't handle the accelerator, so we know both
  55     // that |this| is still valid, and that we didn't want to set the flag.
  56     ignore_next_char_event_ = false;
  57   }
  58
  59   if (event.os_event && !event.skip_in_browser)
  60     focus_manager->OnKeyEvent(*static_cast<ui::KeyEvent*>(event.os_event));
  61 }
  62
  63 }  // namespace views