mirror of
https://github.com/classilla/tenfourfox.git
synced 2024-10-31 15:05:46 +00:00
180 lines
5.5 KiB
C++
180 lines
5.5 KiB
C++
|
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
|
||
|
*
|
||
|
* This Source Code Form is subject to the terms of the Mozilla Public
|
||
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
||
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
||
|
|
||
|
#include <stdio.h>
|
||
|
#include "nsBidiKeyboard.h"
|
||
|
#include "prmem.h"
|
||
|
#include <tchar.h>
|
||
|
|
||
|
NS_IMPL_ISUPPORTS(nsBidiKeyboard, nsIBidiKeyboard)
|
||
|
|
||
|
nsBidiKeyboard::nsBidiKeyboard() : nsIBidiKeyboard()
|
||
|
{
|
||
|
Reset();
|
||
|
}
|
||
|
|
||
|
nsBidiKeyboard::~nsBidiKeyboard()
|
||
|
{
|
||
|
}
|
||
|
|
||
|
NS_IMETHODIMP nsBidiKeyboard::Reset()
|
||
|
{
|
||
|
mInitialized = false;
|
||
|
mHaveBidiKeyboards = false;
|
||
|
mLTRKeyboard[0] = '\0';
|
||
|
mRTLKeyboard[0] = '\0';
|
||
|
mCurrentLocaleName[0] = '\0';
|
||
|
return NS_OK;
|
||
|
}
|
||
|
|
||
|
NS_IMETHODIMP nsBidiKeyboard::IsLangRTL(bool *aIsRTL)
|
||
|
{
|
||
|
*aIsRTL = false;
|
||
|
|
||
|
nsresult result = SetupBidiKeyboards();
|
||
|
if (NS_FAILED(result))
|
||
|
return result;
|
||
|
|
||
|
HKL currentLocale;
|
||
|
|
||
|
currentLocale = ::GetKeyboardLayout(0);
|
||
|
*aIsRTL = IsRTLLanguage(currentLocale);
|
||
|
|
||
|
if (!::GetKeyboardLayoutNameW(mCurrentLocaleName))
|
||
|
return NS_ERROR_FAILURE;
|
||
|
|
||
|
NS_ASSERTION(*mCurrentLocaleName,
|
||
|
"GetKeyboardLayoutName return string length == 0");
|
||
|
NS_ASSERTION((wcslen(mCurrentLocaleName) < KL_NAMELENGTH),
|
||
|
"GetKeyboardLayoutName return string length >= KL_NAMELENGTH");
|
||
|
|
||
|
// The language set by the user overrides the default language for that direction
|
||
|
if (*aIsRTL) {
|
||
|
wcsncpy(mRTLKeyboard, mCurrentLocaleName, KL_NAMELENGTH);
|
||
|
mRTLKeyboard[KL_NAMELENGTH-1] = '\0'; // null terminate
|
||
|
} else {
|
||
|
wcsncpy(mLTRKeyboard, mCurrentLocaleName, KL_NAMELENGTH);
|
||
|
mLTRKeyboard[KL_NAMELENGTH-1] = '\0'; // null terminate
|
||
|
}
|
||
|
|
||
|
NS_ASSERTION((wcslen(mRTLKeyboard) < KL_NAMELENGTH),
|
||
|
"mLTRKeyboard has string length >= KL_NAMELENGTH");
|
||
|
NS_ASSERTION((wcslen(mLTRKeyboard) < KL_NAMELENGTH),
|
||
|
"mRTLKeyboard has string length >= KL_NAMELENGTH");
|
||
|
return NS_OK;
|
||
|
}
|
||
|
|
||
|
NS_IMETHODIMP nsBidiKeyboard::GetHaveBidiKeyboards(bool* aResult)
|
||
|
{
|
||
|
NS_ENSURE_ARG_POINTER(aResult);
|
||
|
|
||
|
nsresult result = SetupBidiKeyboards();
|
||
|
if (NS_FAILED(result))
|
||
|
return result;
|
||
|
|
||
|
*aResult = mHaveBidiKeyboards;
|
||
|
return NS_OK;
|
||
|
}
|
||
|
|
||
|
|
||
|
// Get the list of keyboard layouts available in the system
|
||
|
// Set mLTRKeyboard to the first LTR keyboard in the list and mRTLKeyboard to the first RTL keyboard in the list
|
||
|
// These defaults will be used unless the user explicitly sets something else.
|
||
|
nsresult nsBidiKeyboard::SetupBidiKeyboards()
|
||
|
{
|
||
|
if (mInitialized)
|
||
|
return mHaveBidiKeyboards ? NS_OK : NS_ERROR_FAILURE;
|
||
|
|
||
|
int keyboards;
|
||
|
HKL far* buf;
|
||
|
HKL locale;
|
||
|
wchar_t localeName[KL_NAMELENGTH];
|
||
|
bool isLTRKeyboardSet = false;
|
||
|
bool isRTLKeyboardSet = false;
|
||
|
|
||
|
// GetKeyboardLayoutList with 0 as first parameter returns the number of keyboard layouts available
|
||
|
keyboards = ::GetKeyboardLayoutList(0, nullptr);
|
||
|
if (!keyboards)
|
||
|
return NS_ERROR_FAILURE;
|
||
|
|
||
|
// allocate a buffer to hold the list
|
||
|
buf = (HKL far*) PR_Malloc(keyboards * sizeof(HKL));
|
||
|
if (!buf)
|
||
|
return NS_ERROR_OUT_OF_MEMORY;
|
||
|
|
||
|
// Call again to fill the buffer
|
||
|
if (::GetKeyboardLayoutList(keyboards, buf) != keyboards) {
|
||
|
PR_Free(buf);
|
||
|
return NS_ERROR_UNEXPECTED;
|
||
|
}
|
||
|
|
||
|
// Go through the list and pick a default LTR and RTL keyboard layout
|
||
|
while (keyboards--) {
|
||
|
locale = buf[keyboards];
|
||
|
if (IsRTLLanguage(locale)) {
|
||
|
_snwprintf(mRTLKeyboard, KL_NAMELENGTH, L"%.*x", KL_NAMELENGTH - 1,
|
||
|
LANGIDFROMLCID((DWORD_PTR)locale));
|
||
|
isRTLKeyboardSet = true;
|
||
|
}
|
||
|
else {
|
||
|
_snwprintf(mLTRKeyboard, KL_NAMELENGTH, L"%.*x", KL_NAMELENGTH - 1,
|
||
|
LANGIDFROMLCID((DWORD_PTR)locale));
|
||
|
isLTRKeyboardSet = true;
|
||
|
}
|
||
|
}
|
||
|
PR_Free(buf);
|
||
|
mInitialized = true;
|
||
|
|
||
|
// If there is not at least one keyboard of each directionality, Bidi
|
||
|
// keyboard functionality will be disabled.
|
||
|
mHaveBidiKeyboards = (isRTLKeyboardSet && isLTRKeyboardSet);
|
||
|
if (!mHaveBidiKeyboards)
|
||
|
return NS_ERROR_FAILURE;
|
||
|
|
||
|
// Get the current keyboard layout and use it for either mRTLKeyboard or
|
||
|
// mLTRKeyboard as appropriate. If the user has many keyboard layouts
|
||
|
// installed this prevents us from arbitrarily resetting the current
|
||
|
// layout (bug 80274)
|
||
|
locale = ::GetKeyboardLayout(0);
|
||
|
if (!::GetKeyboardLayoutNameW(localeName))
|
||
|
return NS_ERROR_FAILURE;
|
||
|
|
||
|
NS_ASSERTION(*localeName,
|
||
|
"GetKeyboardLayoutName return string length == 0");
|
||
|
NS_ASSERTION((wcslen(localeName) < KL_NAMELENGTH),
|
||
|
"GetKeyboardLayout return string length >= KL_NAMELENGTH");
|
||
|
|
||
|
if (IsRTLLanguage(locale)) {
|
||
|
wcsncpy(mRTLKeyboard, localeName, KL_NAMELENGTH);
|
||
|
mRTLKeyboard[KL_NAMELENGTH-1] = '\0'; // null terminate
|
||
|
}
|
||
|
else {
|
||
|
wcsncpy(mLTRKeyboard, localeName, KL_NAMELENGTH);
|
||
|
mLTRKeyboard[KL_NAMELENGTH-1] = '\0'; // null terminate
|
||
|
}
|
||
|
|
||
|
NS_ASSERTION(*mRTLKeyboard,
|
||
|
"mLTRKeyboard has string length == 0");
|
||
|
NS_ASSERTION(*mLTRKeyboard,
|
||
|
"mLTRKeyboard has string length == 0");
|
||
|
|
||
|
return NS_OK;
|
||
|
}
|
||
|
|
||
|
// Test whether the language represented by this locale identifier is a
|
||
|
// right-to-left language, using bit 123 of the Unicode subset bitfield in
|
||
|
// the LOCALESIGNATURE
|
||
|
// See http://msdn.microsoft.com/library/default.asp?url=/library/en-us/intl/unicode_63ub.asp
|
||
|
bool nsBidiKeyboard::IsRTLLanguage(HKL aLocale)
|
||
|
{
|
||
|
LOCALESIGNATURE localesig;
|
||
|
return (::GetLocaleInfoW(PRIMARYLANGID((DWORD_PTR)aLocale),
|
||
|
LOCALE_FONTSIGNATURE,
|
||
|
(LPWSTR)&localesig,
|
||
|
(sizeof(localesig)/sizeof(WCHAR))) &&
|
||
|
(localesig.lsUsb[3] & 0x08000000));
|
||
|
}
|