diff options
Diffstat (limited to 'plugins/mir_core/timezones.cpp')
| -rw-r--r-- | plugins/mir_core/timezones.cpp | 224 |
1 files changed, 224 insertions, 0 deletions
diff --git a/plugins/mir_core/timezones.cpp b/plugins/mir_core/timezones.cpp new file mode 100644 index 0000000000..24340cd3d8 --- /dev/null +++ b/plugins/mir_core/timezones.cpp @@ -0,0 +1,224 @@ +/*
+Miranda IM: the free IM client for Microsoft* Windows*
+
+Copyright 2010 Miranda ICQ/IM project,
+all portions of this codebase are copyrighted to the people
+listed in contributors.txt.
+
+This program is free software; you can redistribute it and/or
+modify it under the terms of the GNU General Public License
+as published by the Free Software Foundation; either version 2
+of the License, or (at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+implements services to handle location - based timezones, instead of
+simple UTC offsets.
+*/
+
+#include "commonheaders.h"
+
+#include <m_timezones.h>
+
+typedef DWORD (WINAPI *pfnGetDynamicTimeZoneInformation_t)(DYNAMIC_TIME_ZONE_INFORMATION *pdtzi);
+static pfnGetDynamicTimeZoneInformation_t pfnGetDynamicTimeZoneInformation;
+
+typedef HRESULT (WINAPI *pfnSHLoadIndirectString_t)(LPCWSTR pszSource, LPWSTR pszOutBuf, UINT cchOutBuf, void **ppvReserved);
+static pfnSHLoadIndirectString_t pfnSHLoadIndirectString;
+
+typedef LANGID (WINAPI *pfnGetUserDefaultUILanguage_t)(void);
+static pfnGetUserDefaultUILanguage_t pfnGetUserDefaultUILanguage;
+
+typedef LANGID (WINAPI *pfnGetSystemDefaultUILanguage_t)(void);
+static pfnGetSystemDefaultUILanguage_t pfnGetSystemDefaultUILanguage;
+
+typedef LPARAM (WINAPI *pfnSendMessageW_t)(HWND hWnd, UINT Msg, WPARAM wParam, LPARAM lParam);
+static pfnSendMessageW_t pfnSendMessageW;
+
+typedef struct _REG_TZI_FORMAT
+{
+ LONG Bias;
+ LONG StandardBias;
+ LONG DaylightBias;
+ SYSTEMTIME StandardDate;
+ SYSTEMTIME DaylightDate;
+} REG_TZI_FORMAT;
+
+#define MIM_TZ_DISPLAYLEN 128
+
+struct MIM_TIMEZONE
+{
+ unsigned hash;
+ int offset;
+
+ TCHAR tszName[MIM_TZ_NAMELEN]; // windows name for the time zone
+ wchar_t szDisplay[MIM_TZ_DISPLAYLEN]; // more descriptive display name (that's what usually appears in dialogs)
+ // every hour should be sufficient.
+ TIME_ZONE_INFORMATION tzi;
+
+ static int compareBias(const MIM_TIMEZONE* p1, const MIM_TIMEZONE* p2)
+ { return p2->tzi.Bias - p1->tzi.Bias; }
+};
+
+typedef struct
+{
+ DWORD timestamp; // last time updated
+ MIM_TIMEZONE myTZ; // set to my own timezone
+} TZ_INT_INFO;
+
+static TZ_INT_INFO myInfo;
+bool muiInstalled;
+
+static OBJLIST<MIM_TIMEZONE> g_timezones(55, NumericKeySortT);
+static LIST<MIM_TIMEZONE> g_timezonesBias(55, MIM_TIMEZONE::compareBias);
+
+void FormatTime (const SYSTEMTIME *st, const TCHAR *szFormat, TCHAR *szDest, int cbDest);
+void UnixTimeToFileTime(time_t ts, LPFILETIME pft);
+time_t FileTimeToUnixTime(LPFILETIME pft);
+
+#define fnSystemTimeToTzSpecificLocalTime SystemTimeToTzSpecificLocalTime
+
+void GetLocalizedString(HKEY hSubKey, const TCHAR *szName, wchar_t *szBuf, DWORD cbLen)
+{
+ szBuf[0] = 0;
+ if (muiInstalled)
+ {
+ TCHAR tszTempBuf[MIM_TZ_NAMELEN], tszName[30];
+ mir_sntprintf(tszName, SIZEOF(tszName), _T("MUI_%s"), szName);
+ DWORD dwLength = cbLen * sizeof(TCHAR);
+ if (ERROR_SUCCESS == RegQueryValueEx(hSubKey, tszName, NULL, NULL, (unsigned char *)tszTempBuf, &dwLength))
+ {
+ tszTempBuf[min(dwLength / sizeof(TCHAR), cbLen - 1)] = 0;
+ if (pfnSHLoadIndirectString)
+ pfnSHLoadIndirectString(StrConvU(tszTempBuf), szBuf, cbLen, NULL);
+ }
+ }
+ if (szBuf[0] == 0)
+ {
+ DWORD dwLength = cbLen * sizeof(wchar_t);
+
+
+ RegQueryValueEx(hSubKey, szName, NULL, NULL, (unsigned char *)szBuf, &dwLength);
+ szBuf[min(dwLength / sizeof(TCHAR), cbLen - 1)] = 0;
+ }
+}
+
+void RecalculateTime(void)
+{
+ GetTimeZoneInformation(&myInfo.myTZ.tzi);
+ myInfo.timestamp = time(NULL);
+ myInfo.myTZ.offset = INT_MIN;
+
+ bool found = false;
+ DYNAMIC_TIME_ZONE_INFORMATION dtzi;
+
+ if (pfnGetDynamicTimeZoneInformation && pfnGetDynamicTimeZoneInformation(&dtzi) != TIME_ZONE_ID_INVALID)
+ {
+ TCHAR *myTzKey = mir_u2t(dtzi.TimeZoneKeyName);
+ _tcscpy(myInfo.myTZ.tszName, myTzKey);
+ mir_free(myTzKey);
+ found = true;
+ }
+
+ for (int i = 0; i < g_timezones.getCount(); ++i)
+ {
+ MIM_TIMEZONE &tz = g_timezones[i];
+ if (tz.offset != INT_MIN) tz.offset = INT_MIN;
+
+ if ( !found)
+ {
+ if ( !wcscmp(tz.tzi.StandardName, myInfo.myTZ.tzi.StandardName) ||
+ !wcscmp(tz.tzi.DaylightName, myInfo.myTZ.tzi.DaylightName))
+ {
+ _tcscpy(myInfo.myTZ.tszName, tz.tszName);
+ found = true;
+ }
+ }
+ }
+}
+
+void InitTimeZones(void)
+{
+ REG_TZI_FORMAT tzi;
+ HKEY hKey;
+
+ const TCHAR *tszKey = IsWinVerNT() ?
+ _T("SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Time Zones") :
+ _T("SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Time Zones");
+
+ /*
+ * use GetDynamicTimeZoneInformation() on Vista+ - this will return a structure with
+ * the registry key name, so finding our own time zone later will be MUCH easier for
+ * localized systems or systems with a MUI pack installed
+ */
+ if (IsWinVerVistaPlus())
+ pfnGetDynamicTimeZoneInformation = (pfnGetDynamicTimeZoneInformation_t)GetProcAddress(GetModuleHandle(_T("kernel32")), "GetDynamicTimeZoneInformation");
+
+ if (IsWinVer2000Plus())
+ {
+ pfnSHLoadIndirectString = (pfnSHLoadIndirectString_t)GetProcAddress(GetModuleHandle(_T("shlwapi")), "SHLoadIndirectString");
+ pfnGetSystemDefaultUILanguage = (pfnGetSystemDefaultUILanguage_t)GetProcAddress(GetModuleHandle(_T("kernel32")), "GetSystemDefaultUILanguage");
+ pfnGetUserDefaultUILanguage = (pfnGetUserDefaultUILanguage_t)GetProcAddress(GetModuleHandle(_T("kernel32")), "GetUserDefaultUILanguage");
+ muiInstalled = pfnSHLoadIndirectString && pfnGetSystemDefaultUILanguage() != pfnGetUserDefaultUILanguage();
+ }
+
+ pfnSendMessageW = (pfnSendMessageW_t)GetProcAddress(GetModuleHandle(_T("user32")), "SendMessageW");
+
+ if (ERROR_SUCCESS == RegOpenKeyEx(HKEY_LOCAL_MACHINE, tszKey, 0, KEY_ENUMERATE_SUB_KEYS, &hKey))
+ {
+ DWORD dwIndex = 0;
+ HKEY hSubKey;
+ TCHAR tszName[MIM_TZ_NAMELEN];
+
+ DWORD dwSize = SIZEOF(tszName);
+ while (ERROR_NO_MORE_ITEMS != RegEnumKeyEx(hKey, dwIndex++, tszName, &dwSize, NULL, NULL, 0, NULL))
+ {
+ if (ERROR_SUCCESS == RegOpenKeyEx(hKey, tszName, 0, KEY_QUERY_VALUE, &hSubKey))
+ {
+ dwSize = sizeof(tszName);
+
+ DWORD dwLength = sizeof(tzi);
+ if (ERROR_SUCCESS != RegQueryValueEx(hSubKey, _T("TZI"), NULL, NULL, (unsigned char *)&tzi, &dwLength))
+ continue;
+
+ MIM_TIMEZONE *tz = new MIM_TIMEZONE;
+
+ tz->tzi.Bias = tzi.Bias;
+ tz->tzi.StandardDate = tzi.StandardDate;
+ tz->tzi.StandardBias = tzi.StandardBias;
+ tz->tzi.DaylightDate = tzi.DaylightDate;
+ tz->tzi.DaylightBias = tzi.DaylightBias;
+
+ _tcscpy(tz->tszName, tszName);
+ tz->hash = mir_hashstrT(tszName);
+ tz->offset = INT_MIN;
+
+ GetLocalizedString(hSubKey, _T("Display"), tz->szDisplay, SIZEOF(tz->szDisplay));
+ GetLocalizedString(hSubKey, _T("Std"), tz->tzi.StandardName, SIZEOF(tz->tzi.StandardName));
+ GetLocalizedString(hSubKey, _T("Dlt"), tz->tzi.DaylightName, SIZEOF(tz->tzi.DaylightName));
+
+ g_timezones.insert(tz);
+ g_timezonesBias.insert(tz);
+
+ RegCloseKey(hSubKey);
+ }
+ dwSize = SIZEOF(tszName);
+ }
+ RegCloseKey(hKey);
+ }
+
+ RecalculateTime();
+}
+
+void UninitTimeZones(void)
+{
+ g_timezonesBias.destroy();
+ g_timezones.destroy();
+}
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