1 // Copyright (c) 2011 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 "chrome/browser/ui/views/unhandled_keyboard_event_handler.h"
6
7 #include "base/logging.h"
8 #include "views/focus/focus_manager.h"
9
UnhandledKeyboardEventHandler()10 UnhandledKeyboardEventHandler::UnhandledKeyboardEventHandler() {
11 ignore_next_char_event_ = false;
12 }
13
~UnhandledKeyboardEventHandler()14 UnhandledKeyboardEventHandler::~UnhandledKeyboardEventHandler() {
15 }
16
HandleKeyboardEvent(const NativeWebKeyboardEvent & event,views::FocusManager * focus_manager)17 void UnhandledKeyboardEventHandler::HandleKeyboardEvent(
18 const NativeWebKeyboardEvent& event,
19 views::FocusManager* focus_manager) {
20 if (!focus_manager) {
21 NOTREACHED();
22 return;
23 }
24 // Previous calls to TranslateMessage can generate Char events as well as
25 // RawKeyDown events, even if the latter triggered an accelerator. In these
26 // cases, we discard the Char events.
27 if (event.type == WebKit::WebInputEvent::Char && ignore_next_char_event_) {
28 ignore_next_char_event_ = false;
29 return;
30 }
31 // It's necessary to reset this flag, because a RawKeyDown event may not
32 // always generate a Char event.
33 ignore_next_char_event_ = false;
34
35 if (event.type == WebKit::WebInputEvent::RawKeyDown) {
36 views::Accelerator accelerator(
37 static_cast<ui::KeyboardCode>(event.windowsKeyCode),
38 (event.modifiers & NativeWebKeyboardEvent::ShiftKey) ==
39 NativeWebKeyboardEvent::ShiftKey,
40 (event.modifiers & NativeWebKeyboardEvent::ControlKey) ==
41 NativeWebKeyboardEvent::ControlKey,
42 (event.modifiers & NativeWebKeyboardEvent::AltKey) ==
43 NativeWebKeyboardEvent::AltKey);
44
45 // This is tricky: we want to set ignore_next_char_event_ if
46 // ProcessAccelerator returns true. But ProcessAccelerator might delete
47 // |this| if the accelerator is a "close tab" one. So we speculatively
48 // set the flag and fix it if no event was handled.
49 ignore_next_char_event_ = true;
50
51 if (focus_manager->ProcessAccelerator(accelerator)) {
52 return;
53 }
54
55 // ProcessAccelerator didn't handle the accelerator, so we know both
56 // that |this| is still valid, and that we didn't want to set the flag.
57 ignore_next_char_event_ = false;
58 }
59
60 #if defined(OS_WIN)
61 // Any unhandled keyboard/character messages should be defproced.
62 // This allows stuff like F10, etc to work correctly.
63 DefWindowProc(event.os_event.hwnd, event.os_event.message,
64 event.os_event.wParam, event.os_event.lParam);
65 #endif
66 }
67
68