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/extensions/extension_input_api.h"
6
7#include <string>
8
9#include "base/string_util.h"
10#include "base/values.h"
11#include "chrome/browser/extensions/extension_tabs_module.h"
12#include "chrome/browser/extensions/key_identifier_conversion_views.h"
13#include "chrome/browser/ui/browser.h"
14#include "chrome/browser/ui/browser_window.h"
15#include "chrome/browser/ui/views/frame/browser_view.h"
16#include "content/browser/renderer_host/render_view_host.h"
17#include "content/common/native_web_keyboard_event.h"
18#include "third_party/WebKit/Source/WebKit/chromium/public/WebInputEvent.h"
19#include "views/events/event.h"
20#include "views/ime/input_method.h"
21#include "views/widget/root_view.h"
22#include "views/widget/widget.h"
23
24namespace {
25
26// Keys.
27const char kType[] = "type";
28const char kKeyIdentifier[] = "keyIdentifier";
29const char kAlt[] = "altKey";
30const char kCtrl[] = "ctrlKey";
31const char kMeta[] = "metaKey";
32const char kShift[] = "shiftKey";
33const char kKeyDown[] = "keydown";
34const char kKeyUp[] = "keyup";
35
36// Errors.
37const char kUnknownEventTypeError[] = "Unknown event type.";
38const char kUnknownOrUnsupportedKeyIdentiferError[] = "Unknown or unsupported "
39    "key identifier.";
40const char kUnsupportedModifier[] = "Unsupported modifier.";
41const char kNoValidRecipientError[] = "No valid recipient for event.";
42const char kKeyEventUnprocessedError[] = "Event was not handled.";
43
44ui::EventType GetTypeFromString(const std::string& type) {
45  if (type == kKeyDown) {
46    return ui::ET_KEY_PRESSED;
47  } else if (type == kKeyUp) {
48    return ui::ET_KEY_RELEASED;
49  }
50  return ui::ET_UNKNOWN;
51}
52
53}  // namespace
54
55void InputFunction::Run() {
56  SendResponse(RunImpl());
57}
58
59views::RootView* SendKeyboardEventInputFunction::GetRootView() {
60  Browser* browser = GetCurrentBrowser();
61  if (!browser)
62    return NULL;
63
64  BrowserWindow* window = browser->window();
65  if (!window)
66    return NULL;
67
68  BrowserView* browser_view = BrowserView::GetBrowserViewForNativeWindow(
69      window->GetNativeHandle());
70  if (!browser_view)
71    return NULL;
72
73  return browser_view->GetRootView();
74}
75
76bool SendKeyboardEventInputFunction::RunImpl() {
77  DictionaryValue* args;
78  EXTENSION_FUNCTION_VALIDATE(args_->GetDictionary(0, &args));
79
80  std::string type_name;
81  EXTENSION_FUNCTION_VALIDATE(args->GetString(kType, &type_name));
82  ui::EventType type = GetTypeFromString(type_name);
83  if (type == ui::ET_UNKNOWN) {
84    error_ = kUnknownEventTypeError;
85    return false;
86  }
87
88  std::string identifier;
89  EXTENSION_FUNCTION_VALIDATE(args->GetString(kKeyIdentifier, &identifier));
90  TrimWhitespaceASCII(identifier, TRIM_ALL, &identifier);
91
92  const views::KeyEvent& prototype_event =
93      KeyEventFromKeyIdentifier(identifier);
94  if (prototype_event.key_code() == ui::VKEY_UNKNOWN) {
95    error_ = kUnknownOrUnsupportedKeyIdentiferError;
96    return false;
97  }
98
99  int flags = prototype_event.flags();
100  bool alt = false;
101  if (args->GetBoolean(kAlt, &alt))
102    flags |= alt ? ui::EF_ALT_DOWN : 0;
103  bool ctrl = false;
104  if (args->GetBoolean(kCtrl, &ctrl))
105    flags |= ctrl ? ui::EF_CONTROL_DOWN : 0;
106  bool shift = false;
107  if (args->GetBoolean(kShift, &shift))
108    flags |= shift ? ui::EF_SHIFT_DOWN : 0;
109  bool meta = false;
110  if (args->GetBoolean(kMeta, &meta)) {
111    // Views does not have a Meta event flag, so return an error for now.
112    if (meta) {
113      error_ = kUnsupportedModifier;
114      return false;
115    }
116  }
117
118  views::RootView* root_view = GetRootView();
119  if (!root_view) {
120    error_ = kNoValidRecipientError;
121    return false;
122  }
123
124  views::KeyEvent event(type, prototype_event.key_code(), flags);
125  views::InputMethod* ime = root_view->GetWidget()->GetInputMethod();
126  if (ime) {
127    ime->DispatchKeyEvent(event);
128  } else if (!root_view->ProcessKeyEvent(event)) {
129    error_ = kKeyEventUnprocessedError;
130    return false;
131  }
132
133  return true;
134}
135