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// Copyright (c) 2013 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 "ui/keyboard/keyboard_util.h"
#include <string>
#include "base/command_line.h"
#include "base/logging.h"
#include "base/metrics/histogram.h"
#include "base/strings/string16.h"
#include "grit/keyboard_resources.h"
#include "grit/keyboard_resources_map.h"
#include "ui/aura/client/aura_constants.h"
#include "ui/aura/root_window.h"
#include "ui/base/ime/input_method.h"
#include "ui/base/ime/text_input_client.h"
#include "ui/keyboard/keyboard_switches.h"
namespace {
const char kKeyDown[] ="keydown";
const char kKeyUp[] = "keyup";
void SendProcessKeyEvent(ui::EventType type, aura::RootWindow* root_window) {
ui::TranslatedKeyEvent event(type == ui::ET_KEY_PRESSED,
ui::VKEY_PROCESSKEY,
ui::EF_NONE);
root_window->AsRootWindowHostDelegate()->OnHostKeyEvent(&event);
}
} // namespace
namespace keyboard {
bool IsKeyboardEnabled() {
return CommandLine::ForCurrentProcess()->HasSwitch(
switches::kEnableVirtualKeyboard);
}
bool InsertText(const base::string16& text, aura::RootWindow* root_window) {
if (!root_window)
return false;
ui::InputMethod* input_method = root_window->GetProperty(
aura::client::kRootWindowInputMethodKey);
if (!input_method)
return false;
ui::TextInputClient* tic = input_method->GetTextInputClient();
if (!tic || tic->GetTextInputType() == ui::TEXT_INPUT_TYPE_NONE)
return false;
tic->InsertText(text);
return true;
}
// TODO(varunjain): It would be cleaner to have something in the
// ui::TextInputClient interface, say MoveCaretInDirection(). The code in
// here would get the ui::InputMethod from the root_window, and the
// ui::TextInputClient from that (see above in InsertText()).
bool MoveCursor(int swipe_direction,
int modifier_flags,
aura::RootWindow* root_window) {
if (!root_window)
return false;
ui::KeyboardCode codex = ui::VKEY_UNKNOWN;
ui::KeyboardCode codey = ui::VKEY_UNKNOWN;
if (swipe_direction & kCursorMoveRight)
codex = ui::VKEY_RIGHT;
else if (swipe_direction & kCursorMoveLeft)
codex = ui::VKEY_LEFT;
if (swipe_direction & kCursorMoveUp)
codey = ui::VKEY_UP;
else if (swipe_direction & kCursorMoveDown)
codey = ui::VKEY_DOWN;
// First deal with the x movement.
if (codex != ui::VKEY_UNKNOWN) {
ui::KeyEvent press_event(ui::ET_KEY_PRESSED, codex, modifier_flags, 0);
root_window->AsRootWindowHostDelegate()->OnHostKeyEvent(&press_event);
ui::KeyEvent release_event(ui::ET_KEY_RELEASED, codex, modifier_flags, 0);
root_window->AsRootWindowHostDelegate()->OnHostKeyEvent(&release_event);
}
// Then deal with the y movement.
if (codey != ui::VKEY_UNKNOWN) {
ui::KeyEvent press_event(ui::ET_KEY_PRESSED, codey, modifier_flags, 0);
root_window->AsRootWindowHostDelegate()->OnHostKeyEvent(&press_event);
ui::KeyEvent release_event(ui::ET_KEY_RELEASED, codey, modifier_flags, 0);
root_window->AsRootWindowHostDelegate()->OnHostKeyEvent(&release_event);
}
return true;
}
bool SendKeyEvent(const std::string type,
int key_value,
int key_code,
bool shift_modifier,
aura::RootWindow* root_window) {
ui::EventType event_type = ui::ET_UNKNOWN;
if (type == kKeyDown)
event_type = ui::ET_KEY_PRESSED;
else if (type == kKeyUp)
event_type = ui::ET_KEY_RELEASED;
if (event_type == ui::ET_UNKNOWN)
return false;
int flags = ui::EF_NONE;
if (shift_modifier)
flags = ui::EF_SHIFT_DOWN;
ui::KeyboardCode code = static_cast<ui::KeyboardCode>(key_code);
if (code == ui::VKEY_UNKNOWN) {
// Handling of special printable characters (e.g. accented characters) for
// which there is no key code.
if (event_type == ui::ET_KEY_RELEASED) {
ui::InputMethod* input_method = root_window->GetProperty(
aura::client::kRootWindowInputMethodKey);
if (!input_method)
return false;
ui::TextInputClient* tic = input_method->GetTextInputClient();
SendProcessKeyEvent(ui::ET_KEY_PRESSED, root_window);
tic->InsertChar(static_cast<uint16>(key_value), ui::EF_NONE);
SendProcessKeyEvent(ui::ET_KEY_RELEASED, root_window);
}
} else {
if (event_type == ui::ET_KEY_RELEASED) {
// The number of key press events seen since the last backspace.
static int keys_seen = 0;
if (code == ui::VKEY_BACK) {
// Log the rough lengths of characters typed between backspaces. This
// metric will be used to determine the error rate for the keyboard.
UMA_HISTOGRAM_CUSTOM_COUNTS(
"VirtualKeyboard.KeystrokesBetweenBackspaces",
keys_seen, 1, 1000, 50);
keys_seen = 0;
} else {
++keys_seen;
}
}
ui::KeyEvent event(event_type, code, flags, false);
root_window->AsRootWindowHostDelegate()->OnHostKeyEvent(&event);
}
return true;
}
const GritResourceMap* GetKeyboardExtensionResources(size_t* size) {
// This looks a lot like the contents of a resource map; however it is
// necessary to have a custom path for the extension path, so the resource
// map cannot be used directly.
static const GritResourceMap kKeyboardResources[] = {
{"keyboard/api_adapter.js", IDR_KEYBOARD_API_ADAPTER_JS},
{"keyboard/constants.js", IDR_KEYBOARD_CONSTANTS_JS},
{"keyboard/elements/kb-altkey.html", IDR_KEYBOARD_ELEMENTS_ALTKEY},
{"keyboard/elements/kb-altkey-container.html",
IDR_KEYBOARD_ELEMENTS_ALTKEY_CONTAINER},
{"keyboard/elements/kb-altkey-data.html",
IDR_KEYBOARD_ELEMENTS_ALTKEY_DATA},
{"keyboard/elements/kb-altkey-set.html", IDR_KEYBOARD_ELEMENTS_ALTKEY_SET},
{"keyboard/elements/kb-key.html", IDR_KEYBOARD_ELEMENTS_KEY},
{"keyboard/elements/kb-key-base.html", IDR_KEYBOARD_ELEMENTS_KEY_BASE},
{"keyboard/elements/kb-key-codes.html", IDR_KEYBOARD_ELEMENTS_KEY_CODES},
{"keyboard/elements/kb-key-import.html",
IDR_KEYBOARD_ELEMENTS_KEY_IMPORT},
{"keyboard/elements/kb-key-sequence.html",
IDR_KEYBOARD_ELEMENTS_KEY_SEQUENCE},
{"keyboard/elements/kb-keyboard.html", IDR_KEYBOARD_ELEMENTS_KEYBOARD},
{"keyboard/elements/kb-keyset.html", IDR_KEYBOARD_ELEMENTS_KEYSET},
{"keyboard/elements/kb-row.html", IDR_KEYBOARD_ELEMENTS_ROW},
{"keyboard/elements/kb-shift-key.html", IDR_KEYBOARD_ELEMENTS_SHIFT_KEY},
{"keyboard/images/keyboard.svg", IDR_KEYBOARD_IMAGES_KEYBOARD},
{"keyboard/images/microphone.svg", IDR_KEYBOARD_IMAGES_MICROPHONE},
{"keyboard/images/microphone-green.svg",
IDR_KEYBOARD_IMAGES_MICROPHONE_GREEN},
{"keyboard/index.html", IDR_KEYBOARD_INDEX},
{"keyboard/layouts/dvorak.html", IDR_KEYBOARD_LAYOUTS_DVORAK},
{"keyboard/layouts/latin-accents.js", IDR_KEYBOARD_LAYOUTS_LATIN_ACCENTS},
{"keyboard/layouts/numeric.html", IDR_KEYBOARD_LAYOUTS_NUMERIC},
{"keyboard/layouts/qwerty.html", IDR_KEYBOARD_LAYOUTS_QWERTY},
{"keyboard/layouts/symbol-altkeys.js",
IDR_KEYBOARD_LAYOUTS_SYMBOL_ALTKEYS},
{"keyboard/layouts/spacebar-row.html", IDR_KEYBOARD_SPACEBAR_ROW},
{"keyboard/main.js", IDR_KEYBOARD_MAIN_JS},
{"keyboard/manifest.json", IDR_KEYBOARD_MANIFEST},
{"keyboard/main.css", IDR_KEYBOARD_MAIN_CSS},
{"keyboard/polymer.min.js", IDR_KEYBOARD_POLYMER},
{"keyboard/voice_input.js", IDR_KEYBOARD_VOICE_INPUT_JS},
};
static const size_t kKeyboardResourcesSize = arraysize(kKeyboardResources);
*size = kKeyboardResourcesSize;
return kKeyboardResources;
}
} // namespace keyboard
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