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// Copyright (c) 2010 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/renderer/mock_keyboard_driver_win.h"
#include "base/basictypes.h"
#include "base/logging.h"
#include "chrome/renderer/mock_keyboard.h"
MockKeyboardDriverWin::MockKeyboardDriverWin() {
// Save the keyboard layout and status of the application.
// This class changes the keyboard layout and status of this application.
// This change may break succeeding tests. To prevent this possible break, we
// should save the layout and status here to restore when this instance is
// destroyed.
original_keyboard_layout_ = GetKeyboardLayout(0);
active_keyboard_layout_ = original_keyboard_layout_;
GetKeyboardState(&original_keyboard_states_[0]);
const UINT num_keyboard_layouts = GetKeyboardLayoutList(0, NULL);
DCHECK(num_keyboard_layouts > 0);
orig_keyboard_layouts_list_.resize(num_keyboard_layouts);
GetKeyboardLayoutList(num_keyboard_layouts, &orig_keyboard_layouts_list_[0]);
memset(&keyboard_states_[0], 0, sizeof(keyboard_states_));
}
MockKeyboardDriverWin::~MockKeyboardDriverWin() {
// Unload the keyboard-layout driver, restore the keyboard state, and reset
// the keyboard layout for succeeding tests.
MaybeUnloadActiveLayout();
SetKeyboardState(&original_keyboard_states_[0]);
ActivateKeyboardLayout(original_keyboard_layout_, KLF_RESET);
}
void MockKeyboardDriverWin::MaybeUnloadActiveLayout() {
// Workaround for http://crbug.com/12093
// Only unload a keyboard layout if it was loaded by this mock driver.
// Contrary to the documentation on MSDN unloading a keyboard layout
// previously loaded by the system causes that layout to stop working.
// We have confirmation of this behavior on XP & Vista.
for (size_t i = 0; i < orig_keyboard_layouts_list_.size(); ++i) {
if (orig_keyboard_layouts_list_[i] == active_keyboard_layout_)
return;
}
// If we got here, this keyboard layout wasn't loaded by the system so it's
// safe to unload it ourselve's.
UnloadKeyboardLayout(active_keyboard_layout_);
active_keyboard_layout_ = original_keyboard_layout_;
}
bool MockKeyboardDriverWin::SetLayout(int layout) {
// Unload the current keyboard-layout driver and load a new keyboard-layout
// driver for mapping a virtual key-code to a Unicode character.
MaybeUnloadActiveLayout();
// Scan the mapping table and retrieve a Language ID for the input layout.
// Load the keyboard-layout driver when we find a Language ID.
// This Language IDs are copied from the registry
// "HKLM\SYSTEM\CurrentControlSet\Control\Keyboard layouts".
// TODO(hbono): Add more keyboard-layout drivers.
static const struct {
const wchar_t* language;
MockKeyboard::Layout keyboard_layout;
} kLanguageIDs[] = {
{L"00000401", MockKeyboard::LAYOUT_ARABIC},
{L"00000402", MockKeyboard::LAYOUT_BULGARIAN},
{L"00000404", MockKeyboard::LAYOUT_CHINESE_TRADITIONAL},
{L"00000405", MockKeyboard::LAYOUT_CZECH},
{L"00000406", MockKeyboard::LAYOUT_DANISH},
{L"00000407", MockKeyboard::LAYOUT_GERMAN},
{L"00000408", MockKeyboard::LAYOUT_GREEK},
{L"00000409", MockKeyboard::LAYOUT_UNITED_STATES},
{L"0000040a", MockKeyboard::LAYOUT_SPANISH},
{L"0000040b", MockKeyboard::LAYOUT_FINNISH},
{L"0000040c", MockKeyboard::LAYOUT_FRENCH},
{L"0000040d", MockKeyboard::LAYOUT_HEBREW},
{L"0000040e", MockKeyboard::LAYOUT_HUNGARIAN},
{L"00000410", MockKeyboard::LAYOUT_ITALIAN},
{L"00000411", MockKeyboard::LAYOUT_JAPANESE},
{L"00000412", MockKeyboard::LAYOUT_KOREAN},
{L"00000415", MockKeyboard::LAYOUT_POLISH},
{L"00000416", MockKeyboard::LAYOUT_PORTUGUESE_BRAZILIAN},
{L"00000418", MockKeyboard::LAYOUT_ROMANIAN},
{L"00000419", MockKeyboard::LAYOUT_RUSSIAN},
{L"0000041a", MockKeyboard::LAYOUT_CROATIAN},
{L"0000041b", MockKeyboard::LAYOUT_SLOVAK},
{L"0000041e", MockKeyboard::LAYOUT_THAI},
{L"0000041d", MockKeyboard::LAYOUT_SWEDISH},
{L"0000041f", MockKeyboard::LAYOUT_TURKISH_Q},
{L"0000042a", MockKeyboard::LAYOUT_VIETNAMESE},
{L"00000439", MockKeyboard::LAYOUT_DEVANAGARI_INSCRIPT},
{L"00000816", MockKeyboard::LAYOUT_PORTUGUESE},
{L"00001409", MockKeyboard::LAYOUT_UNITED_STATES_DVORAK},
{L"00001009", MockKeyboard::LAYOUT_CANADIAN_FRENCH},
};
for (size_t i = 0; i < ARRAYSIZE_UNSAFE(kLanguageIDs); ++i) {
if (layout == kLanguageIDs[i].keyboard_layout) {
HKL new_keyboard_layout = LoadKeyboardLayout(kLanguageIDs[i].language,
KLF_ACTIVATE);
// loaded_keyboard_layout_ must always have a valid keyboard handle
// so we only assign upon success.
if (new_keyboard_layout) {
active_keyboard_layout_ = new_keyboard_layout;
return true;
}
return false;
}
}
// Return false if there are not any matching drivers.
return false;
}
bool MockKeyboardDriverWin::SetModifiers(int modifiers) {
// Over-write the keyboard status with our modifier-key status.
// WebInputEventFactory::keyboardEvent() uses GetKeyState() to retrive
// modifier-key status. So, we update the modifier-key status with this
// SetKeyboardState() call before creating NativeWebKeyboardEvent
// instances.
memset(&keyboard_states_[0], 0, sizeof(keyboard_states_));
static const struct {
int key_code;
int mask;
} kModifierMasks[] = {
{VK_SHIFT, MockKeyboard::LEFT_SHIFT | MockKeyboard::RIGHT_SHIFT},
{VK_CONTROL, MockKeyboard::LEFT_CONTROL | MockKeyboard::RIGHT_CONTROL},
{VK_MENU, MockKeyboard::LEFT_ALT | MockKeyboard::RIGHT_ALT},
{VK_LSHIFT, MockKeyboard::LEFT_SHIFT},
{VK_LCONTROL, MockKeyboard::LEFT_CONTROL},
{VK_LMENU, MockKeyboard::LEFT_ALT},
{VK_RSHIFT, MockKeyboard::RIGHT_SHIFT},
{VK_RCONTROL, MockKeyboard::RIGHT_CONTROL},
{VK_RMENU, MockKeyboard::RIGHT_ALT},
};
for (size_t i = 0; i < ARRAYSIZE_UNSAFE(kModifierMasks); ++i) {
const int kKeyDownMask = 0x80;
if (modifiers & kModifierMasks[i].mask)
keyboard_states_[kModifierMasks[i].key_code] = kKeyDownMask;
}
SetKeyboardState(&keyboard_states_[0]);
return true;
}
int MockKeyboardDriverWin::GetCharacters(int key_code,
std::wstring* output) {
// Retrieve Unicode characters composed from the input key-code and
// the mofifiers.
CHECK(output);
wchar_t code[16];
int length = ToUnicodeEx(key_code, MapVirtualKey(key_code, 0),
&keyboard_states_[0], &code[0], arraysize(code), 0,
active_keyboard_layout_);
if (length > 0)
output->assign(code);
return length;
}
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