src/TortoiseUDiff/MainWindow.cpp

   1 // TortoiseGit - a Windows shell extension for easy version control
   2
   3 // Copyright (C) 2012 - TortoiseGit
   4 // Copyright (C) 2003-2012 - TortoiseSVN
   5
   6 // This program is free software; you can redistribute it and/or
   7 // modify it under the terms of the GNU General Public License
   8 // as published by the Free Software Foundation; either version 2
   9 // of the License, or (at your option) any later version.
  10
  11 // This program is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15
  16 // You should have received a copy of the GNU General Public License
  17 // along with this program; if not, write to the Free Software Foundation,
  18 // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  19 //
  20 #include "stdafx.h"
  21 #include "MainWindow.h"
  22 #include "UnicodeUtils.h"
  23 #include "StringUtils.h"
  24 #include "TaskbarUUID.h"
  25 #include "CreateProcessHelper.h"
  26 #include "SysInfo.h"
  27
  28 const UINT TaskBarButtonCreated = RegisterWindowMessage(L"TaskbarButtonCreated");
  29
  30 CMainWindow::CMainWindow(HINSTANCE hInst, const WNDCLASSEX* wcx /* = NULL*/)
  31         : CWindow(hInst, wcx)
  32         , m_bShowFindBar(false)
  33         , m_directFunction(0)
  34         , m_directPointer(0)
  35         , m_hWndEdit(NULL)
  36         , m_bMatchCase(false)
  37 {
  38         SetWindowTitle(_T("TortoiseGitUDiff"));
  39 }
  40
  41 CMainWindow::~CMainWindow(void)
  42 {
  43 }
  44
  45 bool CMainWindow::RegisterAndCreateWindow()
  46 {
  47         WNDCLASSEX wcx;
  48
  49         // Fill in the window class structure with default parameters
  50         wcx.cbSize = sizeof(WNDCLASSEX);
  51         wcx.style = CS_HREDRAW | CS_VREDRAW;
  52         wcx.lpfnWndProc = CWindow::stWinMsgHandler;
  53         wcx.cbClsExtra = 0;
  54         wcx.cbWndExtra = 0;
  55         wcx.hInstance = hResource;
  56         wcx.hCursor = NULL;
  57         wcx.lpszClassName = ResString(hResource, IDS_APP_TITLE);
  58         wcx.hIcon = LoadIcon(hResource, MAKEINTRESOURCE(IDI_TORTOISEUDIFF));
  59         wcx.hbrBackground = (HBRUSH)(COLOR_3DFACE+1);
  60         wcx.lpszMenuName = MAKEINTRESOURCE(IDC_TORTOISEUDIFF);
  61         wcx.hIconSm = LoadIcon(wcx.hInstance, MAKEINTRESOURCE(IDI_TORTOISEUDIFF));
  62         if (RegisterWindow(&wcx))
  63         {
  64                 if (Create(WS_CAPTION | WS_MAXIMIZEBOX | WS_MINIMIZEBOX | WS_SIZEBOX | WS_SYSMENU | WS_CLIPCHILDREN, NULL))
  65                 {
  66                         m_FindBar.SetParent(*this);
  67                         m_FindBar.Create(hResource, IDD_FINDBAR, *this);
  68                         UpdateWindow(*this);
  69                         return true;
  70                 }
  71         }
  72         return false;
  73 }
  74
  75 LRESULT CALLBACK CMainWindow::WinMsgHandler(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
  76 {
  77         if (uMsg == TaskBarButtonCreated)
  78         {
  79                 SetUUIDOverlayIcon(hwnd);
  80         }
  81         switch (uMsg)
  82         {
  83         case WM_CREATE:
  84                 {
  85                         m_hwnd = hwnd;
  86                         Initialize();
  87                 }
  88                 break;
  89         case WM_COMMAND:
  90                 {
  91                         return DoCommand(LOWORD(wParam));
  92                 }
  93                 break;
  94         case WM_MOUSEWHEEL:
  95                 {
  96                         if (GET_KEYSTATE_WPARAM(wParam) == MK_SHIFT)
  97                         {
  98                                 // scroll sideways
  99                                 SendEditor(SCI_LINESCROLL, -GET_WHEEL_DELTA_WPARAM(wParam)/40, 0);
 100                         }
 101                         else
 102                                 return DefWindowProc(hwnd, uMsg, wParam, lParam);
 103                 }
 104                 break;
 105         case WM_SIZE:
 106                 {
 107                         RECT rect;
 108                         GetClientRect(*this, &rect);
 109                         if (m_bShowFindBar)
 110                         {
 111                                 ::SetWindowPos(m_hWndEdit, HWND_TOP,
 112                                         rect.left, rect.top,
 113                                         rect.right-rect.left, rect.bottom-rect.top-30,
 114                                         SWP_SHOWWINDOW);
 115                                 ::SetWindowPos(m_FindBar, HWND_TOP,
 116                                         rect.left, rect.bottom-30,
 117                                         rect.right-rect.left, 30,
 118                                         SWP_SHOWWINDOW);
 119                         }
 120                         else
 121                         {
 122                                 ::SetWindowPos(m_hWndEdit, HWND_TOP,
 123                                         rect.left, rect.top,
 124                                         rect.right-rect.left, rect.bottom-rect.top,
 125                                         SWP_SHOWWINDOW);
 126                                 ::ShowWindow(m_FindBar, SW_HIDE);
 127                         }
 128                 }
 129                 break;
 130         case WM_GETMINMAXINFO:
 131                 {
 132                         MINMAXINFO * mmi = (MINMAXINFO*)lParam;
 133                         mmi->ptMinTrackSize.x = 100;
 134                         mmi->ptMinTrackSize.y = 100;
 135                         return 0;
 136                 }
 137                 break;
 138         case WM_DESTROY:
 139                 PostQuitMessage(0);
 140                 break;
 141         case WM_CLOSE:
 142                 ::DestroyWindow(m_hwnd);
 143                 break;
 144         case WM_SETFOCUS:
 145                 SetFocus(m_hWndEdit);
 146                 break;
 147         case COMMITMONITOR_FINDMSGNEXT:
 148                 {
 149                         SendEditor(SCI_CHARRIGHT);
 150                         SendEditor(SCI_SEARCHANCHOR);
 151                         m_bMatchCase = !!wParam;
 152                         m_findtext = (LPCTSTR)lParam;
 153                         SendEditor(SCI_SEARCHNEXT, m_bMatchCase ? SCFIND_MATCHCASE : 0, (LPARAM)CUnicodeUtils::StdGetUTF8(m_findtext).c_str());
 154                         SendEditor(SCI_SCROLLCARET);
 155                 }
 156                 break;
 157         case COMMITMONITOR_FINDMSGPREV:
 158                 {
 159                         SendEditor(SCI_SEARCHANCHOR);
 160                         m_bMatchCase = !!wParam;
 161                         m_findtext = (LPCTSTR)lParam;
 162                         SendEditor(SCI_SEARCHPREV, m_bMatchCase ? SCFIND_MATCHCASE : 0, (LPARAM)CUnicodeUtils::StdGetUTF8(m_findtext).c_str());
 163                         SendEditor(SCI_SCROLLCARET);
 164                 }
 165                 break;
 166         case COMMITMONITOR_FINDEXIT:
 167                 {
 168                         RECT rect;
 169                         GetClientRect(*this, &rect);
 170                         m_bShowFindBar = false;
 171                         ::ShowWindow(m_FindBar, SW_HIDE);
 172                         ::SetWindowPos(m_hWndEdit, HWND_TOP,
 173                                 rect.left, rect.top,
 174                                 rect.right-rect.left, rect.bottom-rect.top,
 175                                 SWP_SHOWWINDOW);
 176                 }
 177                 break;
 178         case COMMITMONITOR_FINDRESET:
 179                 SendEditor(SCI_SETSELECTIONSTART, 0);
 180                 SendEditor(SCI_SETSELECTIONEND, 0);
 181                 SendEditor(SCI_SEARCHANCHOR);
 182                 break;
 183         default:
 184                 return DefWindowProc(hwnd, uMsg, wParam, lParam);
 185         }
 186
 187         return 0;
 188 };
 189
 190 LRESULT CMainWindow::DoCommand(int id)
 191 {
 192         switch (id)
 193         {
 194         case ID_FILE_OPEN:
 195                 loadOrSaveFile(true);
 196                 break;
 197         case ID_FILE_SAVEAS:
 198                 loadOrSaveFile(false);
 199                 break;
 200         case ID_FILE_SAVE:
 201                 loadOrSaveFile(false, m_filename);
 202                 break;
 203         case ID_FILE_EXIT:
 204                 ::PostQuitMessage(0);
 205                 return 0;
 206         case IDM_SHOWFINDBAR:
 207                 {
 208                         m_bShowFindBar = true;
 209                         ::ShowWindow(m_FindBar, SW_SHOW);
 210                         RECT rect;
 211                         GetClientRect(*this, &rect);
 212                         ::SetWindowPos(m_hWndEdit, HWND_TOP,
 213                                 rect.left, rect.top,
 214                                 rect.right-rect.left, rect.bottom-rect.top-30,
 215                                 SWP_SHOWWINDOW);
 216                         ::SetWindowPos(m_FindBar, HWND_TOP,
 217                                 rect.left, rect.bottom-30,
 218                                 rect.right-rect.left, 30,
 219                                 SWP_SHOWWINDOW);
 220                         ::SetFocus(m_FindBar);
 221                         SendEditor(SCI_SETSELECTIONSTART, 0);
 222                         SendEditor(SCI_SETSELECTIONEND, 0);
 223                         SendEditor(SCI_SEARCHANCHOR);
 224                 }
 225                 break;
 226         case IDM_FINDNEXT:
 227                 SendEditor(SCI_CHARRIGHT);
 228                 SendEditor(SCI_SEARCHANCHOR);
 229                 SendEditor(SCI_SEARCHNEXT, m_bMatchCase ? SCFIND_MATCHCASE : 0, (LPARAM)CUnicodeUtils::StdGetUTF8(m_findtext).c_str());
 230                 SendEditor(SCI_SCROLLCARET);
 231                 break;
 232         case IDM_FINDPREV:
 233                 SendEditor(SCI_SEARCHANCHOR);
 234                 SendEditor(SCI_SEARCHPREV, m_bMatchCase ? SCFIND_MATCHCASE : 0, (LPARAM)CUnicodeUtils::StdGetUTF8(m_findtext).c_str());
 235                 SendEditor(SCI_SCROLLCARET);
 236                 break;
 237         case IDM_FINDEXIT:
 238                 if (IsWindowVisible(m_FindBar))
 239                 {
 240                         RECT rect;
 241                         GetClientRect(*this, &rect);
 242                         m_bShowFindBar = false;
 243                         ::ShowWindow(m_FindBar, SW_HIDE);
 244                         ::SetWindowPos(m_hWndEdit, HWND_TOP,
 245                                 rect.left, rect.top,
 246                                 rect.right-rect.left, rect.bottom-rect.top,
 247                                 SWP_SHOWWINDOW);
 248                 }
 249                 else
 250                         PostQuitMessage(0);
 251                 break;
 252         case ID_FILE_SETTINGS:
 253                 {
 254                         tstring gitCmd = _T(" /command:settings /page:blame");
 255                         RunCommand(gitCmd);
 256                 }
 257                 break;
 258         default:
 259                 break;
 260         };
 261         return 1;
 262 }
 263
 264 std::wstring CMainWindow::GetAppDirectory()
 265 {
 266         std::wstring path;
 267         DWORD len = 0;
 268         DWORD bufferlen = MAX_PATH;             // MAX_PATH is not the limit here!
 269         do
 270         {
 271                 bufferlen += MAX_PATH;          // MAX_PATH is not the limit here!
 272                 std::unique_ptr<TCHAR[]> pBuf(new TCHAR[bufferlen]);
 273                 len = GetModuleFileName(NULL, pBuf.get(), bufferlen);
 274                 path = pBuf.get();
 275         } while(len == bufferlen);
 276         path = path.substr(0, path.rfind('\\') + 1);
 277
 278         return path;
 279 }
 280
 281 void CMainWindow::RunCommand(const std::wstring& command)
 282 {
 283         tstring tortoiseProcPath = GetAppDirectory() + _T("TortoiseGitProc.exe");
 284         CCreateProcessHelper::CreateProcessDetached(tortoiseProcPath.c_str(), const_cast<TCHAR*>(command.c_str()));
 285 }
 286
 287 LRESULT CMainWindow::SendEditor(UINT Msg, WPARAM wParam, LPARAM lParam)
 288 {
 289         if (m_directFunction)
 290         {
 291                 return ((SciFnDirect) m_directFunction)(m_directPointer, Msg, wParam, lParam);
 292         }
 293         return ::SendMessage(m_hWndEdit, Msg, wParam, lParam);
 294 }
 295
 296 bool CMainWindow::Initialize()
 297 {
 298         m_hWndEdit = ::CreateWindow(
 299                 _T("Scintilla"),
 300                 _T("Source"),
 301                 WS_CHILD | WS_VSCROLL | WS_HSCROLL | WS_CLIPCHILDREN,
 302                 CW_USEDEFAULT, CW_USEDEFAULT,
 303                 CW_USEDEFAULT, CW_USEDEFAULT,
 304                 *this,
 305                 0,
 306                 hResource,
 307                 0);
 308         if (m_hWndEdit == NULL)
 309                 return false;
 310
 311         RECT rect;
 312         GetClientRect(*this, &rect);
 313         ::SetWindowPos(m_hWndEdit, HWND_TOP,
 314                 rect.left, rect.top,
 315                 rect.right-rect.left, rect.bottom-rect.top,
 316                 SWP_SHOWWINDOW);
 317
 318         m_directFunction = SendMessage(m_hWndEdit, SCI_GETDIRECTFUNCTION, 0, 0);
 319         m_directPointer = SendMessage(m_hWndEdit, SCI_GETDIRECTPOINTER, 0, 0);
 320
 321         // Set up the global default style. These attributes are used wherever no explicit choices are made.
 322         SetAStyle(STYLE_DEFAULT, ::GetSysColor(COLOR_WINDOWTEXT), ::GetSysColor(COLOR_WINDOW),
 323                 // Reusing TortoiseBlame's setting which already have an user friendly
 324                 // pane in TortoiseSVN's Settings dialog, while there is no such
 325                 // pane for TortoiseUDiff.
 326                 CRegStdDWORD(_T("Software\\TortoiseGit\\BlameFontSize"), 10),
 327                 CUnicodeUtils::StdGetUTF8(CRegStdString(_T("Software\\TortoiseGit\\BlameFontName"), _T("Courier New"))).c_str());
 328         SendEditor(SCI_SETTABWIDTH, 4);
 329         SendEditor(SCI_SETREADONLY, TRUE);
 330         LRESULT pix = SendEditor(SCI_TEXTWIDTH, STYLE_LINENUMBER, (LPARAM)"_99999");
 331         SendEditor(SCI_SETMARGINWIDTHN, 0, pix);
 332         SendEditor(SCI_SETMARGINWIDTHN, 1);
 333         SendEditor(SCI_SETMARGINWIDTHN, 2);
 334         //Set the default windows colors for edit controls
 335         SendEditor(SCI_STYLESETFORE, STYLE_DEFAULT, ::GetSysColor(COLOR_WINDOWTEXT));
 336         SendEditor(SCI_STYLESETBACK, STYLE_DEFAULT, ::GetSysColor(COLOR_WINDOW));
 337         SendEditor(SCI_SETSELFORE, TRUE, ::GetSysColor(COLOR_HIGHLIGHTTEXT));
 338         SendEditor(SCI_SETSELBACK, TRUE, ::GetSysColor(COLOR_HIGHLIGHT));
 339         SendEditor(SCI_SETCARETFORE, ::GetSysColor(COLOR_WINDOWTEXT));
 340         CRegStdDWORD used2d(L"Software\\TortoiseGit\\ScintillaDirect2D", FALSE);
 341         if (SysInfo::Instance().IsWin7OrLater() && DWORD(used2d))
 342         {
 343                 SendEditor(SCI_SETTECHNOLOGY, SC_TECHNOLOGY_DIRECTWRITE);
 344                 SendEditor(SCI_SETBUFFEREDDRAW, 0);
 345         }
 346         SendEditor(SCI_SETFONTQUALITY, SC_EFF_QUALITY_LCD_OPTIMIZED);
 347
 348         return true;
 349 }
 350
 351 bool CMainWindow::LoadFile(HANDLE hFile)
 352 {
 353         InitEditor();
 354         char data[4096];
 355         DWORD dwRead = 0;
 356
 357         BOOL bRet = ReadFile(hFile, data, sizeof(data), &dwRead, NULL);
 358         bool bUTF8 = IsUTF8(data, dwRead);
 359         while ((dwRead > 0) && (bRet))
 360         {
 361                 SendEditor(SCI_ADDTEXT, dwRead,
 362                         reinterpret_cast<LPARAM>(static_cast<char *>(data)));
 363                 bRet = ReadFile(hFile, data, sizeof(data), &dwRead, NULL);
 364         }
 365         SetupWindow(bUTF8);
 366         return true;
 367 }
 368
 369 bool CMainWindow::LoadFile(LPCTSTR filename)
 370 {
 371         InitEditor();
 372         FILE *fp = NULL;
 373         _tfopen_s(&fp, filename, _T("rb"));
 374         if (!fp)
 375                 return false;
 376
 377         //SetTitle();
 378         char data[4096];
 379         size_t lenFile = fread(data, 1, sizeof(data), fp);
 380         bool bUTF8 = IsUTF8(data, lenFile);
 381         while (lenFile > 0)
 382         {
 383                 SendEditor(SCI_ADDTEXT, lenFile,
 384                         reinterpret_cast<LPARAM>(static_cast<char *>(data)));
 385                 lenFile = fread(data, 1, sizeof(data), fp);
 386         }
 387         fclose(fp);
 388         SetupWindow(bUTF8);
 389         m_filename = filename;
 390         return true;
 391 }
 392
 393 void CMainWindow::InitEditor()
 394 {
 395         SendEditor(SCI_SETREADONLY, FALSE);
 396         SendEditor(SCI_CLEARALL);
 397         SendEditor(EM_EMPTYUNDOBUFFER);
 398         SendEditor(SCI_SETSAVEPOINT);
 399         SendEditor(SCI_CANCEL);
 400         SendEditor(SCI_SETUNDOCOLLECTION, 0);
 401 }
 402
 403 void CMainWindow::SetupWindow(bool bUTF8)
 404 {
 405         SendEditor(SCI_SETCODEPAGE, bUTF8 ? SC_CP_UTF8 : GetACP());
 406
 407         SendEditor(SCI_SETUNDOCOLLECTION, 1);
 408         ::SetFocus(m_hWndEdit);
 409         SendEditor(EM_EMPTYUNDOBUFFER);
 410         SendEditor(SCI_SETSAVEPOINT);
 411         SendEditor(SCI_GOTOPOS, 0);
 412
 413         SendEditor(SCI_CLEARDOCUMENTSTYLE, 0, 0);
 414         SendEditor(SCI_SETSTYLEBITS, 5, 0);
 415
 416         //SetAStyle(SCE_DIFF_DEFAULT, RGB(0, 0, 0));
 417         SetAStyle(SCE_DIFF_COMMAND, RGB(0x0A, 0x24, 0x36));
 418         SetAStyle(SCE_DIFF_POSITION, RGB(0xFF, 0, 0));
 419         SetAStyle(SCE_DIFF_HEADER, RGB(0x80, 0, 0), RGB(0xFF, 0xFF, 0x80));
 420         SetAStyle(SCE_DIFF_COMMENT, RGB(0, 0x80, 0));
 421         SendEditor(SCI_STYLESETBOLD, SCE_DIFF_COMMENT, TRUE);
 422         SetAStyle(SCE_DIFF_DELETED, ::GetSysColor(COLOR_WINDOWTEXT), RGB(0xFF, 0x80, 0x80));
 423         SetAStyle(SCE_DIFF_ADDED, ::GetSysColor(COLOR_WINDOWTEXT), RGB(0x80, 0xFF, 0x80));
 424
 425         SendEditor(SCI_SETLEXER, SCLEX_DIFF);
 426         SendEditor(SCI_SETKEYWORDS, 0, (LPARAM)"revision");
 427         SendEditor(SCI_COLOURISE, 0, -1);
 428         ::ShowWindow(m_hWndEdit, SW_SHOW);
 429 }
 430
 431 bool CMainWindow::SaveFile(LPCTSTR filename)
 432 {
 433         FILE *fp = NULL;
 434         _tfopen_s(&fp, filename, _T("w+b"));
 435         if (!fp)
 436                 return false;
 437
 438         LRESULT len = SendEditor(SCI_GETTEXT, 0, 0);
 439         std::unique_ptr<char[]> data (new char[len+1]);
 440         SendEditor(SCI_GETTEXT, len, reinterpret_cast<LPARAM>(static_cast<char *>(data.get())));
 441         fwrite(data.get(), sizeof(char), len-1, fp);
 442         fclose(fp);
 443
 444         SendEditor(SCI_SETSAVEPOINT);
 445         ::ShowWindow(m_hWndEdit, SW_SHOW);
 446         return true;
 447 }
 448
 449 void CMainWindow::SetTitle(LPCTSTR title)
 450 {
 451         size_t len = _tcslen(title);
 452         std::unique_ptr<TCHAR[]> pBuf(new TCHAR[len + 40]);
 453         _stprintf_s(pBuf.get(), len + 40, _T("%s - TortoiseGitUDiff"), title);
 454         SetWindowTitle(std::wstring(pBuf.get()));
 455 }
 456
 457 void CMainWindow::SetAStyle(int style, COLORREF fore, COLORREF back, int size, const char *face)
 458 {
 459         SendEditor(SCI_STYLESETFORE, style, fore);
 460         SendEditor(SCI_STYLESETBACK, style, back);
 461         if (size >= 1)
 462                 SendEditor(SCI_STYLESETSIZE, style, size);
 463         if (face)
 464                 SendEditor(SCI_STYLESETFONT, style, reinterpret_cast<LPARAM>(face));
 465 }
 466
 467 bool CMainWindow::IsUTF8(LPVOID pBuffer, size_t cb)
 468 {
 469         if (cb < 2)
 470                 return true;
 471         UINT16 * pVal16 = (UINT16 *)pBuffer;
 472         UINT8 * pVal8 = (UINT8 *)(pVal16+1);
 473         // scan the whole buffer for a 0x0000 sequence
 474         // if found, we assume a binary file
 475         for (size_t i=0; i<(cb-2); i=i+2)
 476         {
 477                 if (0x0000 == *pVal16++)
 478                         return false;
 479         }
 480         pVal16 = (UINT16 *)pBuffer;
 481         if (*pVal16 == 0xFEFF)
 482                 return false;
 483         if (cb < 3)
 484                 return false;
 485         if (*pVal16 == 0xBBEF)
 486         {
 487                 if (*pVal8 == 0xBF)
 488                         return true;
 489         }
 490         // check for illegal UTF8 chars
 491         pVal8 = (UINT8 *)pBuffer;
 492         for (size_t i=0; i<cb; ++i)
 493         {
 494                 if ((*pVal8 == 0xC0)||(*pVal8 == 0xC1)||(*pVal8 >= 0xF5))
 495                         return false;
 496                 pVal8++;
 497         }
 498         pVal8 = (UINT8 *)pBuffer;
 499         bool bUTF8 = false;
 500         for (size_t i=0; i<(cb-3); ++i)
 501         {
 502                 if ((*pVal8 & 0xE0)==0xC0)
 503                 {
 504                         pVal8++;i++;
 505                         if ((*pVal8 & 0xC0)!=0x80)
 506                                 return false;
 507                         bUTF8 = true;
 508                 }
 509                 if ((*pVal8 & 0xF0)==0xE0)
 510                 {
 511                         pVal8++;i++;
 512                         if ((*pVal8 & 0xC0)!=0x80)
 513                                 return false;
 514                         pVal8++;i++;
 515                         if ((*pVal8 & 0xC0)!=0x80)
 516                                 return false;
 517                         bUTF8 = true;
 518                 }
 519                 if ((*pVal8 & 0xF8)==0xF0)
 520                 {
 521                         pVal8++;i++;
 522                         if ((*pVal8 & 0xC0)!=0x80)
 523                                 return false;
 524                         pVal8++;i++;
 525                         if ((*pVal8 & 0xC0)!=0x80)
 526                                 return false;
 527                         pVal8++;i++;
 528                         if ((*pVal8 & 0xC0)!=0x80)
 529                                 return false;
 530                         bUTF8 = true;
 531                 }
 532                 pVal8++;
 533         }
 534         if (bUTF8)
 535                 return true;
 536         return false;
 537 }
 538
 539 void CMainWindow::loadOrSaveFile(bool doLoad, const wstring& filename /* = L"" */)
 540 {
 541         OPENFILENAME ofn = {0};                         // common dialog box structure
 542         TCHAR szFile[MAX_PATH] = {0};           // buffer for file name
 543         // Initialize OPENFILENAME
 544         ofn.lStructSize = sizeof(OPENFILENAME);
 545         ofn.hwndOwner = *this;
 546         ofn.lpstrFile = szFile;
 547         ofn.nMaxFile = sizeof(szFile)/sizeof(TCHAR);
 548         TCHAR filter[1024];
 549         LoadString(hResource, IDS_PATCHFILEFILTER, filter, sizeof(filter)/sizeof(TCHAR));
 550         CStringUtils::PipesToNulls(filter);
 551         ofn.lpstrFilter = filter;
 552         ofn.nFilterIndex = 1;
 553         ofn.lpstrFileTitle = NULL;
 554         ofn.nMaxFileTitle = 0;
 555         ofn.lpstrInitialDir = NULL;
 556         TCHAR fileTitle[1024];
 557         LoadString(hResource, doLoad ? IDS_OPENPATCH : IDS_SAVEPATCH, fileTitle, sizeof(fileTitle)/sizeof(TCHAR));
 558         ofn.lpstrTitle = fileTitle;
 559         ofn.Flags = OFN_ENABLESIZING | OFN_EXPLORER;
 560         if(doLoad)
 561                 ofn.Flags |= OFN_PATHMUSTEXIST | OFN_FILEMUSTEXIST;
 562         else
 563                 ofn.Flags |= OFN_OVERWRITEPROMPT;
 564         // Display the Open dialog box.
 565         if( doLoad )
 566         {
 567                 if (GetOpenFileName(&ofn)==TRUE)
 568                 {
 569                         LoadFile(ofn.lpstrFile);
 570                 }
 571         }
 572         else
 573         {
 574                 if (filename.empty())
 575                 {
 576                         if (GetSaveFileName(&ofn)==TRUE)
 577                         {
 578                                 SaveFile(ofn.lpstrFile);
 579                         }
 580                 }
 581                 else
 582                         SaveFile(filename.c_str());
 583         }
 584 }