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// Copyright (c) 2012 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/api/input/input.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/top_level_widget.h"
#include "chrome/common/chrome_notification_types.h"
#include "ui/base/events/event.h"
#include "ui/views/ime/input_method.h"
#include "ui/views/widget/widget.h"
namespace extensions {
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.";
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;
}
} // 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 ui::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 =
chrome::GetTopLevelWidgetForBrowser(GetCurrentBrowser());
if (!widget) {
error_ = kNoValidRecipientError;
return false;
}
ui::KeyEvent event(type,
prototype_event.key_code(),
flags,
prototype_event.is_char());
if (character) {
event.set_character(character);
event.set_unmodified_character(character);
}
views::InputMethod* ime = widget->GetInputMethod();
if (ime) {
ime->DispatchKeyEvent(event);
} else {
widget->OnKeyEvent(&event);
if (event.handled()) {
error_ = kKeyEventUnprocessedError;
return false;
}
}
return true;
}
} // namespace extensions
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