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
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  // 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
67