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
12using content::NativeWebKeyboardEvent;
13
14namespace views {
15
16UnhandledKeyboardEventHandler::UnhandledKeyboardEventHandler()
17    : ignore_next_char_event_(false) {
18}
19
20void 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
64