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
24 namespace {
25
26 // Keys.
27 const char kType[] = "type";
28 const char kKeyIdentifier[] = "keyIdentifier";
29 const char kAlt[] = "altKey";
30 const char kCtrl[] = "ctrlKey";
31 const char kMeta[] = "metaKey";
32 const char kShift[] = "shiftKey";
33 const char kKeyDown[] = "keydown";
34 const char kKeyUp[] = "keyup";
35
36 // Errors.
37 const char kUnknownEventTypeError[] = "Unknown event type.";
38 const char kUnknownOrUnsupportedKeyIdentiferError[] = "Unknown or unsupported "
39 "key identifier.";
40 const char kUnsupportedModifier[] = "Unsupported modifier.";
41 const char kNoValidRecipientError[] = "No valid recipient for event.";
42 const char kKeyEventUnprocessedError[] = "Event was not handled.";
43
GetTypeFromString(const std::string & type)44 ui::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
Run()55 void InputFunction::Run() {
56 SendResponse(RunImpl());
57 }
58
GetRootView()59 views::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
RunImpl()76 bool 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