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// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/extensions/extension_input_api.h"
#include <string>
#include "base/string_number_conversions.h"
#include "base/string_util.h"
#include "base/values.h"
#include "chrome/browser/extensions/key_identifier_conversion_views.h"
#include "chrome/browser/ui/browser.h"
#include "chrome/browser/ui/browser_window.h"
#include "chrome/browser/ui/views/frame/browser_view.h"
#include "chrome/common/chrome_notification_types.h"
#include "views/events/event.h"
#include "views/ime/input_method.h"
#include "views/views_delegate.h"
#include "views/widget/widget.h"
#if defined(USE_VIRTUAL_KEYBOARD)
#include "content/public/browser/notification_service.h"
#endif
#if defined(OS_CHROMEOS) && defined(TOUCH_UI)
#include "chrome/browser/chromeos/input_method/input_method_manager.h"
#include "chrome/browser/chromeos/input_method/ibus_controller.h"
#include "chrome/browser/chromeos/login/base_login_display_host.h"
#endif
namespace {
// Keys.
const char kType[] = "type";
const char kKeyIdentifier[] = "keyIdentifier";
const char kAlt[] = "altKey";
const char kCtrl[] = "ctrlKey";
const char kMeta[] = "metaKey";
const char kShift[] = "shiftKey";
const char kKeyDown[] = "keydown";
const char kKeyUp[] = "keyup";
// Errors.
const char kUnknownEventTypeError[] = "Unknown event type.";
const char kUnknownOrUnsupportedKeyIdentiferError[] = "Unknown or unsupported "
"key identifier.";
const char kUnsupportedModifier[] = "Unsupported modifier.";
const char kNoValidRecipientError[] = "No valid recipient for event.";
const char kKeyEventUnprocessedError[] = "Event was not handled.";
const char kInvalidHeight[] = "Invalid height.";
ui::EventType GetTypeFromString(const std::string& type) {
if (type == kKeyDown) {
return ui::ET_KEY_PRESSED;
} else if (type == kKeyUp) {
return ui::ET_KEY_RELEASED;
}
return ui::ET_UNKNOWN;
}
// Converts a hex string "U+NNNN" to uint16. Returns 0 on error.
uint16 UnicodeIdentifierStringToInt(const std::string& key_identifier) {
int character = 0;
if ((key_identifier.length() == 6) &&
(key_identifier.substr(0, 2) == "U+") &&
(key_identifier.substr(2).find_first_not_of("0123456789abcdefABCDEF") ==
std::string::npos)) {
const bool result =
base::HexStringToInt(key_identifier.substr(2), &character);
DCHECK(result) << key_identifier;
}
return character;
}
views::Widget* GetTopLevelWidget(Browser* browser) {
if (views::ViewsDelegate::views_delegate) {
views::View* view = views::ViewsDelegate::views_delegate->
GetDefaultParentView();
if (view)
return view->GetWidget();
}
#if defined(OS_CHROMEOS) && defined(TOUCH_UI)
chromeos::LoginDisplayHost* host =
chromeos::BaseLoginDisplayHost::default_host();
if (host)
return views::Widget::GetWidgetForNativeWindow(host->GetNativeWindow());
#endif
if (!browser)
return NULL;
BrowserWindow* window = browser->window();
if (!window)
return NULL;
BrowserView* browser_view = BrowserView::GetBrowserViewForBrowser(browser);
return browser_view ? browser_view->GetWidget() : NULL;
}
} // namespace
bool SendKeyboardEventInputFunction::RunImpl() {
DictionaryValue* args;
EXTENSION_FUNCTION_VALIDATE(args_->GetDictionary(0, &args));
std::string type_name;
EXTENSION_FUNCTION_VALIDATE(args->GetString(kType, &type_name));
ui::EventType type = GetTypeFromString(type_name);
if (type == ui::ET_UNKNOWN) {
error_ = kUnknownEventTypeError;
return false;
}
std::string identifier;
EXTENSION_FUNCTION_VALIDATE(args->GetString(kKeyIdentifier, &identifier));
TrimWhitespaceASCII(identifier, TRIM_ALL, &identifier);
const views::KeyEvent& prototype_event =
KeyEventFromKeyIdentifier(identifier);
uint16 character = 0;
if (prototype_event.key_code() == ui::VKEY_UNKNOWN) {
// Check if |identifier| is "U+NNNN" format.
character = UnicodeIdentifierStringToInt(identifier);
if (!character) {
error_ = kUnknownOrUnsupportedKeyIdentiferError;
return false;
}
}
bool flag = false;
int flags = 0;
if (prototype_event.key_code() != ui::VKEY_UNKNOWN)
flags = prototype_event.flags();
flags |= (args->GetBoolean(kAlt, &flag) && flag) ? ui::EF_ALT_DOWN : 0;
flags |= (args->GetBoolean(kCtrl, &flag) && flag) ? ui::EF_CONTROL_DOWN : 0;
flags |= (args->GetBoolean(kShift, &flag) && flag) ? ui::EF_SHIFT_DOWN : 0;
if (args->GetBoolean(kMeta, &flag) && flag) {
// Views does not have a Meta event flag, so return an error for now.
error_ = kUnsupportedModifier;
return false;
}
views::Widget* widget = GetTopLevelWidget(GetCurrentBrowser());
if (!widget) {
error_ = kNoValidRecipientError;
return false;
}
views::KeyEvent event(type, prototype_event.key_code(), flags);
if (character) {
event.set_character(character);
event.set_unmodified_character(character);
}
views::InputMethod* ime = widget->GetInputMethod();
if (ime) {
ime->DispatchKeyEvent(event);
} else if (!widget->OnKeyEvent(event)) {
error_ = kKeyEventUnprocessedError;
return false;
}
return true;
}
#if defined(USE_VIRTUAL_KEYBOARD)
bool HideKeyboardFunction::RunImpl() {
content::NotificationService::current()->Notify(
chrome::NOTIFICATION_HIDE_KEYBOARD_INVOKED,
content::Source<HideKeyboardFunction>(this),
content::NotificationService::NoDetails());
return true;
}
bool SetKeyboardHeightFunction::RunImpl() {
int height = 0;
EXTENSION_FUNCTION_VALIDATE(args_->GetInteger(0, &height));
if (height < 0) {
error_ = kInvalidHeight;
return false;
}
// TODO(penghuang) Check the height is not greater than height of browser view
// and set the height of virtual keyboard directly instead of using
// notification.
content::NotificationService::current()->Notify(
chrome::NOTIFICATION_SET_KEYBOARD_HEIGHT_INVOKED,
content::Source<SetKeyboardHeightFunction>(this),
content::Details<int>(&height));
return true;
}
#endif
#if defined(OS_CHROMEOS) && defined(TOUCH_UI)
// TODO(yusukes): This part should be moved to extension_input_api_chromeos.cc.
bool SendHandwritingStrokeFunction::RunImpl() {
// TODO(yusukes): Add a parameter for an input context ID.
ListValue* value = NULL;
EXTENSION_FUNCTION_VALIDATE(args_->GetList(0, &value));
chromeos::input_method::HandwritingStroke stroke;
for (size_t i = 0; i < value->GetSize(); ++i) {
DictionaryValue* dict;
double x = 0.0;
double y = 0.0;
EXTENSION_FUNCTION_VALIDATE(value->GetDictionary(i, &dict));
EXTENSION_FUNCTION_VALIDATE(dict->GetDouble("x", &x));
EXTENSION_FUNCTION_VALIDATE(dict->GetDouble("y", &y));
stroke.push_back(std::make_pair(x, y));
}
views::Widget* widget = GetTopLevelWidget(GetCurrentBrowser());
views::InputMethod* ime = widget ? widget->GetInputMethod() : NULL;
if (ime) {
static const views::KeyEvent* dummy_keydown = new views::KeyEvent(
ui::ET_KEY_PRESSED, ui::VKEY_UNKNOWN, 0);
static const views::KeyEvent* dummy_keyup = new views::KeyEvent(
ui::ET_KEY_RELEASED, ui::VKEY_UNKNOWN, 0);
// These fake key events are necessary for clearing |suppress_next_result_|
// flag in view/ime/input_method_*.cc. Otherwise, clicking a candidate in
// the candidate window might be ignored.
ime->DispatchKeyEvent(*dummy_keydown);
ime->DispatchKeyEvent(*dummy_keyup);
}
chromeos::input_method::InputMethodManager::GetInstance()->
SendHandwritingStroke(stroke);
return true;
}
bool CancelHandwritingStrokesFunction::RunImpl() {
// TODO(yusukes): Add a parameter for an input context ID.
int stroke_count = 0; // zero means 'clear all strokes'.
if (HasOptionalArgument(0)) {
EXTENSION_FUNCTION_VALIDATE(args_->GetInteger(0, &stroke_count));
EXTENSION_FUNCTION_VALIDATE(stroke_count >= 0);
}
chromeos::input_method::InputMethodManager::GetInstance()->
CancelHandwritingStrokes(stroke_count);
return true;
}
#endif
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