programs/wordpad/print.c

   1 /*
   2  * Wordpad implementation - Printing and print preview functions
   3  *
   4  * Copyright 2007-2008 by Alexander N. Sørnes <alex@thehandofagony.com>
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library 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 GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #include <windows.h>
  22 #include <richedit.h>
  23 #include <commctrl.h>
  24 #include <commdlg.h>
  25
  26 #include "wordpad.h"
  27
  28 typedef struct _previewinfo
  29 {
  30     int page;
  31     int pages_shown;
  32     int saved_pages_shown;
  33     int *pageEnds, pageCapacity;
  34     int textlength;
  35     HDC hdc;
  36     HDC hdc2;
  37     RECT window;
  38     RECT rcPage;
  39     SIZE bmSize;
  40     SIZE bmScaledSize;
  41     SIZE spacing;
  42     float zoomratio;
  43     int zoomlevel;
  44     LPWSTR wszFileName;
  45 } previewinfo, *ppreviewinfo;
  46
  47 static HGLOBAL devMode;
  48 static HGLOBAL devNames;
  49
  50 static RECT margins;
  51 static previewinfo preview;
  52
  53 extern const WCHAR wszPreviewWndClass[];
  54
  55 static const WCHAR var_pagemargin[] = {'P','a','g','e','M','a','r','g','i','n',0};
  56 static const WCHAR var_previewpages[] = {'P','r','e','v','i','e','w','P','a','g','e','s',0};
  57
  58 static LPWSTR get_print_file_filter(HWND hMainWnd)
  59 {
  60     static WCHAR wszPrintFilter[MAX_STRING_LEN*2+6+4+1];
  61     const WCHAR files_prn[] = {'*','.','P','R','N',0};
  62     const WCHAR files_all[] = {'*','.','*','\0'};
  63     LPWSTR p;
  64     HINSTANCE hInstance = GetModuleHandleW(0);
  65
  66     p = wszPrintFilter;
  67     LoadStringW(hInstance, STRING_PRINTER_FILES_PRN, p, MAX_STRING_LEN);
  68     p += lstrlenW(p) + 1;
  69     lstrcpyW(p, files_prn);
  70     p += lstrlenW(p) + 1;
  71     LoadStringW(hInstance, STRING_ALL_FILES, p, MAX_STRING_LEN);
  72     p += lstrlenW(p) + 1;
  73     lstrcpyW(p, files_all);
  74     p += lstrlenW(p) + 1;
  75     *p = 0;
  76
  77     return wszPrintFilter;
  78 }
  79
  80 void registry_set_pagemargins(HKEY hKey)
  81 {
  82     RegSetValueExW(hKey, var_pagemargin, 0, REG_BINARY, (LPBYTE)&margins, sizeof(RECT));
  83 }
  84
  85 void registry_read_pagemargins(HKEY hKey)
  86 {
  87     DWORD size = sizeof(RECT);
  88
  89     if(!hKey || RegQueryValueExW(hKey, var_pagemargin, 0, NULL, (LPBYTE)&margins,
  90                      &size) != ERROR_SUCCESS || size != sizeof(RECT))
  91     {
  92         margins.top = 1417;
  93         margins.bottom = 1417;
  94         margins.left = 1757;
  95         margins.right = 1757;
  96     }
  97 }
  98
  99 void registry_set_previewpages(HKEY hKey)
 100 {
 101     RegSetValueExW(hKey, var_previewpages, 0, REG_DWORD,
 102                    (LPBYTE)&preview.pages_shown, sizeof(DWORD));
 103 }
 104
 105 void registry_read_previewpages(HKEY hKey)
 106 {
 107     DWORD size = sizeof(DWORD);
 108     if(!hKey ||
 109        RegQueryValueExW(hKey, var_previewpages, 0, NULL,
 110                         (LPBYTE)&preview.pages_shown, &size) != ERROR_SUCCESS ||
 111        size != sizeof(DWORD))
 112     {
 113         preview.pages_shown = 1;
 114     } else {
 115         if (preview.pages_shown < 1) preview.pages_shown = 1;
 116         else if (preview.pages_shown > 2) preview.pages_shown = 2;
 117     }
 118 }
 119
 120
 121 static void AddTextButton(HWND hRebarWnd, UINT string, UINT command, UINT id)
 122 {
 123     REBARBANDINFOW rb;
 124     HINSTANCE hInstance = GetModuleHandleW(0);
 125     WCHAR text[MAX_STRING_LEN];
 126     HWND hButton;
 127
 128     LoadStringW(hInstance, string, text, MAX_STRING_LEN);
 129     hButton = CreateWindowW(WC_BUTTONW, text,
 130                             WS_VISIBLE | WS_CHILD, 5, 5, 100, 15,
 131                             hRebarWnd, ULongToHandle(command), hInstance, NULL);
 132
 133     rb.cbSize = REBARBANDINFOW_V6_SIZE;
 134     rb.fMask = RBBIM_SIZE | RBBIM_CHILDSIZE | RBBIM_STYLE | RBBIM_CHILD | RBBIM_IDEALSIZE | RBBIM_ID;
 135     rb.fStyle = RBBS_NOGRIPPER | RBBS_VARIABLEHEIGHT;
 136     rb.hwndChild = hButton;
 137     rb.cyChild = rb.cyMinChild = 22;
 138     rb.cx = rb.cxMinChild = 90;
 139     rb.cxIdeal = 100;
 140     rb.wID = id;
 141
 142     SendMessageW(hRebarWnd, RB_INSERTBANDW, -1, (LPARAM)&rb);
 143 }
 144
 145 static HDC make_dc(void)
 146 {
 147     if(devNames && devMode)
 148     {
 149         LPDEVNAMES dn = GlobalLock(devNames);
 150         LPDEVMODEW dm = GlobalLock(devMode);
 151         HDC ret;
 152
 153         ret = CreateDCW((LPWSTR)dn + dn->wDriverOffset,
 154                          (LPWSTR)dn + dn->wDeviceOffset, 0, dm);
 155
 156         GlobalUnlock(dn);
 157         GlobalUnlock(dm);
 158
 159         return ret;
 160     } else
 161     {
 162         return 0;
 163     }
 164 }
 165
 166 static LONG twips_to_centmm(int twips)
 167 {
 168     return MulDiv(twips, CENTMM_PER_INCH, TWIPS_PER_INCH);
 169 }
 170
 171 static LONG centmm_to_twips(int mm)
 172 {
 173     return MulDiv(mm, TWIPS_PER_INCH, CENTMM_PER_INCH);
 174 }
 175
 176 static LONG twips_to_pixels(int twips, int dpi)
 177 {
 178     return MulDiv(twips, dpi, TWIPS_PER_INCH);
 179 }
 180
 181 static LONG devunits_to_twips(int units, int dpi)
 182 {
 183     return MulDiv(units, TWIPS_PER_INCH, dpi);
 184 }
 185
 186
 187 static RECT get_print_rect(HDC hdc)
 188 {
 189     RECT rc;
 190     int width, height;
 191
 192     if(hdc)
 193     {
 194         int dpiY = GetDeviceCaps(hdc, LOGPIXELSY);
 195         int dpiX = GetDeviceCaps(hdc, LOGPIXELSX);
 196         width = devunits_to_twips(GetDeviceCaps(hdc, PHYSICALWIDTH), dpiX);
 197         height = devunits_to_twips(GetDeviceCaps(hdc, PHYSICALHEIGHT), dpiY);
 198     } else
 199     {
 200         width = centmm_to_twips(18500);
 201         height = centmm_to_twips(27000);
 202     }
 203
 204     rc.left = margins.left;
 205     rc.right = width - margins.right;
 206     rc.top = margins.top;
 207     rc.bottom = height - margins.bottom;
 208
 209     return rc;
 210 }
 211
 212 void target_device(HWND hMainWnd, DWORD wordWrap)
 213 {
 214     HWND hEditorWnd = GetDlgItem(hMainWnd, IDC_EDITOR);
 215
 216     if(wordWrap == ID_WORDWRAP_MARGIN)
 217     {
 218         int width = 0;
 219         LRESULT result;
 220         HDC hdc = make_dc();
 221         RECT rc = get_print_rect(hdc);
 222
 223         width = rc.right - rc.left;
 224         if(!hdc)
 225         {
 226             HDC hMaindc = GetDC(hMainWnd);
 227             hdc = CreateCompatibleDC(hMaindc);
 228             ReleaseDC(hMainWnd, hMaindc);
 229         }
 230         result = SendMessageW(hEditorWnd, EM_SETTARGETDEVICE, (WPARAM)hdc, width);
 231         DeleteDC(hdc);
 232         if (result)
 233             return;
 234         /* otherwise EM_SETTARGETDEVICE failed, so fall back on wrapping
 235          * to window using the NULL DC. */
 236     }
 237
 238     if (wordWrap != ID_WORDWRAP_NONE) {
 239         SendMessageW(hEditorWnd, EM_SETTARGETDEVICE, 0, 0);
 240     } else {
 241         SendMessageW(hEditorWnd, EM_SETTARGETDEVICE, 0, 1);
 242     }
 243
 244 }
 245
 246 static LPWSTR dialog_print_to_file(HWND hMainWnd)
 247 {
 248     OPENFILENAMEW ofn;
 249     static WCHAR file[MAX_PATH] = {'O','U','T','P','U','T','.','P','R','N',0};
 250     static const WCHAR defExt[] = {'P','R','N',0};
 251     static LPWSTR file_filter;
 252
 253     if(!file_filter)
 254         file_filter = get_print_file_filter(hMainWnd);
 255
 256     ZeroMemory(&ofn, sizeof(ofn));
 257
 258     ofn.lStructSize = sizeof(ofn);
 259     ofn.Flags = OFN_PATHMUSTEXIST | OFN_HIDEREADONLY | OFN_OVERWRITEPROMPT;
 260     ofn.hwndOwner = hMainWnd;
 261     ofn.lpstrFilter = file_filter;
 262     ofn.lpstrFile = file;
 263     ofn.nMaxFile = MAX_PATH;
 264     ofn.lpstrDefExt = defExt;
 265
 266     if(GetSaveFileNameW(&ofn))
 267         return file;
 268     else
 269         return FALSE;
 270 }
 271
 272 static void char_from_pagenum(HWND hEditorWnd, FORMATRANGE *fr, int page)
 273 {
 274     int i;
 275
 276     fr->chrg.cpMin = 0;
 277
 278     for(i = 1; i < page; i++)
 279     {
 280         int bottom = fr->rc.bottom;
 281         fr->chrg.cpMin = SendMessageW(hEditorWnd, EM_FORMATRANGE, FALSE, (LPARAM)fr);
 282         fr->rc.bottom = bottom;
 283     }
 284 }
 285
 286 static HWND get_ruler_wnd(HWND hMainWnd)
 287 {
 288     return GetDlgItem(GetDlgItem(hMainWnd, IDC_REBAR), IDC_RULER);
 289 }
 290
 291 void redraw_ruler(HWND hRulerWnd)
 292 {
 293     RECT rc;
 294
 295     GetClientRect(hRulerWnd, &rc);
 296     InvalidateRect(hRulerWnd, &rc, TRUE);
 297 }
 298
 299 static void update_ruler(HWND hRulerWnd)
 300 {
 301      SendMessageW(hRulerWnd, WM_USER, 0, 0);
 302      redraw_ruler(hRulerWnd);
 303 }
 304
 305 static void add_ruler_units(HDC hdcRuler, RECT* drawRect, BOOL NewMetrics, LONG EditLeftmost)
 306 {
 307     static HDC hdc;
 308
 309     if(NewMetrics)
 310     {
 311         static HBITMAP hBitmap;
 312         int i, x, y, RulerTextEnd;
 313         int CmPixels;
 314         int QuarterCmPixels;
 315         HFONT hFont;
 316         WCHAR FontName[] = {'M','S',' ','S','a','n','s',' ','S','e','r','i','f',0};
 317
 318         if(hdc)
 319         {
 320             DeleteDC(hdc);
 321             DeleteObject(hBitmap);
 322         }
 323
 324         hdc = CreateCompatibleDC(0);
 325
 326         CmPixels = twips_to_pixels(centmm_to_twips(1000), GetDeviceCaps(hdc, LOGPIXELSX));
 327         QuarterCmPixels = (int)((float)CmPixels / 4.0);
 328
 329         hBitmap = CreateCompatibleBitmap(hdc, drawRect->right, drawRect->bottom);
 330         SelectObject(hdc, hBitmap);
 331         FillRect(hdc, drawRect, GetStockObject(WHITE_BRUSH));
 332
 333         hFont = CreateFontW(10, 6, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, FontName);
 334
 335         SelectObject(hdc, hFont);
 336         SetBkMode(hdc, TRANSPARENT);
 337         SetTextAlign(hdc, TA_CENTER);
 338         y = (int)(((float)drawRect->bottom - (float)drawRect->top) / 2.0) + 1;
 339         RulerTextEnd = drawRect->right - EditLeftmost + 1;
 340         for(i = 1, x = EditLeftmost; x < (drawRect->right - EditLeftmost + 1); i ++)
 341         {
 342             WCHAR str[3];
 343             WCHAR format[] = {'%','d',0};
 344             int x2 = x;
 345
 346             x2 += QuarterCmPixels;
 347             if(x2 > RulerTextEnd)
 348                 break;
 349
 350             MoveToEx(hdc, x2, y, NULL);
 351             LineTo(hdc, x2, y+2);
 352
 353             x2 += QuarterCmPixels;
 354             if(x2 > RulerTextEnd)
 355                 break;
 356
 357             MoveToEx(hdc, x2, y - 3, NULL);
 358             LineTo(hdc, x2, y + 3);
 359
 360             x2 += QuarterCmPixels;
 361             if(x2 > RulerTextEnd)
 362                 break;
 363
 364             MoveToEx(hdc, x2, y, NULL);
 365             LineTo(hdc, x2, y+2);
 366
 367             x += CmPixels;
 368             if(x > RulerTextEnd)
 369                 break;
 370
 371             wsprintfW(str, format, i);
 372             TextOutW(hdc, x, 5, str, lstrlenW(str));
 373         }
 374         DeleteObject(hFont);
 375     }
 376
 377     BitBlt(hdcRuler, 0, 0, drawRect->right, drawRect->bottom, hdc, 0, 0, SRCAND);
 378 }
 379
 380 static void paint_ruler(HWND hWnd, LONG EditLeftmost, BOOL NewMetrics)
 381 {
 382     PAINTSTRUCT ps;
 383     HDC hdc = BeginPaint(hWnd, &ps);
 384     HDC hdcPrint = make_dc();
 385     RECT printRect = get_print_rect(hdcPrint);
 386     RECT drawRect;
 387     HBRUSH hBrush = CreateSolidBrush(GetSysColor(COLOR_MENU));
 388
 389     GetClientRect(hWnd, &drawRect);
 390     FillRect(hdc, &drawRect, hBrush);
 391
 392     drawRect.top += 3;
 393     drawRect.bottom -= 3;
 394     drawRect.left = EditLeftmost;
 395     drawRect.right = twips_to_pixels(printRect.right - margins.left, GetDeviceCaps(hdc, LOGPIXELSX));
 396     FillRect(hdc, &drawRect, GetStockObject(WHITE_BRUSH));
 397
 398     drawRect.top--;
 399     drawRect.bottom++;
 400     DrawEdge(hdc, &drawRect, EDGE_SUNKEN, BF_RECT);
 401
 402     drawRect.left = drawRect.right - 1;
 403     drawRect.right = twips_to_pixels(printRect.right + margins.right - margins.left, GetDeviceCaps(hdc, LOGPIXELSX));
 404     DrawEdge(hdc, &drawRect, EDGE_ETCHED, BF_RECT);
 405
 406     drawRect.left = 0;
 407     drawRect.top = 0;
 408     add_ruler_units(hdc, &drawRect, NewMetrics, EditLeftmost);
 409
 410     SelectObject(hdc, GetStockObject(BLACK_BRUSH));
 411     DeleteObject(hBrush);
 412     DeleteDC(hdcPrint);
 413     EndPaint(hWnd, &ps);
 414 }
 415
 416 LRESULT CALLBACK ruler_proc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
 417 {
 418     static WNDPROC pPrevRulerProc;
 419     static LONG EditLeftmost;
 420     static BOOL NewMetrics;
 421
 422     switch(msg)
 423     {
 424         case WM_USER:
 425             if(wParam)
 426             {
 427                 EditLeftmost = ((POINTL*)wParam)->x;
 428                 pPrevRulerProc = (WNDPROC)lParam;
 429             }
 430             NewMetrics = TRUE;
 431             break;
 432
 433         case WM_PAINT:
 434             paint_ruler(hWnd, EditLeftmost, NewMetrics);
 435             break;
 436
 437         default:
 438             return CallWindowProcW(pPrevRulerProc, hWnd, msg, wParam, lParam);
 439     }
 440
 441     return 0;
 442 }
 443
 444 static void print(LPPRINTDLGW pd, LPWSTR wszFileName)
 445 {
 446     FORMATRANGE fr;
 447     DOCINFOW di;
 448     HWND hEditorWnd = GetDlgItem(pd->hwndOwner, IDC_EDITOR);
 449     int printedPages = 0;
 450
 451     fr.hdc = pd->hDC;
 452     fr.hdcTarget = pd->hDC;
 453
 454     fr.rc = get_print_rect(fr.hdc);
 455     fr.rcPage.left = 0;
 456     fr.rcPage.right = fr.rc.right + margins.right;
 457     fr.rcPage.top = 0;
 458     fr.rcPage.bottom = fr.rc.bottom + margins.bottom;
 459
 460     ZeroMemory(&di, sizeof(di));
 461     di.cbSize = sizeof(di);
 462     di.lpszDocName = wszFileName;
 463
 464     if(pd->Flags & PD_PRINTTOFILE)
 465     {
 466         di.lpszOutput = dialog_print_to_file(pd->hwndOwner);
 467         if(!di.lpszOutput)
 468             return;
 469     }
 470
 471     if(pd->Flags & PD_SELECTION)
 472     {
 473         SendMessageW(hEditorWnd, EM_EXGETSEL, 0, (LPARAM)&fr.chrg);
 474     } else
 475     {
 476         GETTEXTLENGTHEX gt;
 477         gt.flags = GTL_DEFAULT;
 478         gt.codepage = 1200;
 479         fr.chrg.cpMin = 0;
 480         fr.chrg.cpMax = SendMessageW(hEditorWnd, EM_GETTEXTLENGTHEX, (WPARAM)&gt, 0);
 481
 482         if(pd->Flags & PD_PAGENUMS)
 483             char_from_pagenum(hEditorWnd, &fr, pd->nToPage);
 484     }
 485
 486     StartDocW(fr.hdc, &di);
 487     do
 488     {
 489         if(StartPage(fr.hdc) <= 0)
 490             break;
 491
 492         fr.chrg.cpMin = SendMessageW(hEditorWnd, EM_FORMATRANGE, TRUE, (LPARAM)&fr);
 493
 494         if(EndPage(fr.hdc) <= 0)
 495             break;
 496
 497         printedPages++;
 498         if((pd->Flags & PD_PAGENUMS) && (printedPages > (pd->nToPage - pd->nFromPage)))
 499             break;
 500     }
 501     while(fr.chrg.cpMin && fr.chrg.cpMin < fr.chrg.cpMax);
 502
 503     EndDoc(fr.hdc);
 504     SendMessageW(hEditorWnd, EM_FORMATRANGE, FALSE, 0);
 505 }
 506
 507 void dialog_printsetup(HWND hMainWnd)
 508 {
 509     PAGESETUPDLGW ps;
 510
 511     ZeroMemory(&ps, sizeof(ps));
 512     ps.lStructSize = sizeof(ps);
 513     ps.hwndOwner = hMainWnd;
 514     ps.Flags = PSD_INHUNDREDTHSOFMILLIMETERS | PSD_MARGINS;
 515     ps.rtMargin.left = twips_to_centmm(margins.left);
 516     ps.rtMargin.right = twips_to_centmm(margins.right);
 517     ps.rtMargin.top = twips_to_centmm(margins.top);
 518     ps.rtMargin.bottom = twips_to_centmm(margins.bottom);
 519     ps.hDevMode = devMode;
 520     ps.hDevNames = devNames;
 521
 522     if(PageSetupDlgW(&ps))
 523     {
 524         margins.left = centmm_to_twips(ps.rtMargin.left);
 525         margins.right = centmm_to_twips(ps.rtMargin.right);
 526         margins.top = centmm_to_twips(ps.rtMargin.top);
 527         margins.bottom = centmm_to_twips(ps.rtMargin.bottom);
 528         devMode = ps.hDevMode;
 529         devNames = ps.hDevNames;
 530         update_ruler(get_ruler_wnd(hMainWnd));
 531     }
 532 }
 533
 534 void get_default_printer_opts(void)
 535 {
 536     PRINTDLGW pd;
 537     ZeroMemory(&pd, sizeof(pd));
 538
 539     ZeroMemory(&pd, sizeof(pd));
 540     pd.lStructSize = sizeof(pd);
 541     pd.Flags = PD_RETURNDC | PD_RETURNDEFAULT;
 542     pd.hDevMode = devMode;
 543
 544     PrintDlgW(&pd);
 545
 546     devMode = pd.hDevMode;
 547     devNames = pd.hDevNames;
 548 }
 549
 550 void print_quick(HWND hMainWnd, LPWSTR wszFileName)
 551 {
 552     PRINTDLGW pd;
 553
 554     ZeroMemory(&pd, sizeof(pd));
 555     pd.hwndOwner = hMainWnd;
 556     pd.hDC = make_dc();
 557
 558     print(&pd, wszFileName);
 559     DeleteDC(pd.hDC);
 560 }
 561
 562 void dialog_print(HWND hMainWnd, LPWSTR wszFileName)
 563 {
 564     PRINTDLGW pd;
 565     HWND hEditorWnd = GetDlgItem(hMainWnd, IDC_EDITOR);
 566     int from = 0;
 567     int to = 0;
 568
 569     ZeroMemory(&pd, sizeof(pd));
 570     pd.lStructSize = sizeof(pd);
 571     pd.hwndOwner = hMainWnd;
 572     pd.Flags = PD_RETURNDC | PD_USEDEVMODECOPIESANDCOLLATE;
 573     pd.nMinPage = 1;
 574     pd.nMaxPage = -1;
 575     pd.hDevMode = devMode;
 576     pd.hDevNames = devNames;
 577
 578     SendMessageW(hEditorWnd, EM_GETSEL, (WPARAM)&from, (LPARAM)&to);
 579     if(from == to)
 580         pd.Flags |= PD_NOSELECTION;
 581
 582     if(PrintDlgW(&pd))
 583     {
 584         devMode = pd.hDevMode;
 585         devNames = pd.hDevNames;
 586         print(&pd, wszFileName);
 587         update_ruler(get_ruler_wnd(hMainWnd));
 588     }
 589 }
 590
 591 static void preview_bar_show(HWND hMainWnd, BOOL show)
 592 {
 593     HWND hReBar = GetDlgItem(hMainWnd, IDC_REBAR);
 594     int i;
 595
 596     if(show)
 597     {
 598         REBARBANDINFOW rb;
 599         HWND hStatic;
 600         UINT num_pages_string = preview.pages_shown > 1 ? STRING_PREVIEW_ONEPAGE :
 601                                                           STRING_PREVIEW_TWOPAGES;
 602
 603         AddTextButton(hReBar, STRING_PREVIEW_PRINT, ID_PRINT, BANDID_PREVIEW_BTN1);
 604         AddTextButton(hReBar, STRING_PREVIEW_NEXTPAGE, ID_PREVIEW_NEXTPAGE, BANDID_PREVIEW_BTN2);
 605         AddTextButton(hReBar, STRING_PREVIEW_PREVPAGE, ID_PREVIEW_PREVPAGE, BANDID_PREVIEW_BTN3);
 606         AddTextButton(hReBar, num_pages_string, ID_PREVIEW_NUMPAGES, BANDID_PREVIEW_BTN4);
 607         AddTextButton(hReBar, STRING_PREVIEW_ZOOMIN, ID_PREVIEW_ZOOMIN, BANDID_PREVIEW_BTN5);
 608         AddTextButton(hReBar, STRING_PREVIEW_ZOOMOUT, ID_PREVIEW_ZOOMOUT, BANDID_PREVIEW_BTN6);
 609         AddTextButton(hReBar, STRING_PREVIEW_CLOSE, ID_FILE_EXIT, BANDID_PREVIEW_BTN7);
 610
 611         hStatic = CreateWindowW(WC_STATICW, NULL,
 612                                 WS_VISIBLE | WS_CHILD, 0, 0, 0, 0,
 613                                 hReBar, NULL, NULL, NULL);
 614
 615         rb.cbSize = REBARBANDINFOW_V6_SIZE;
 616         rb.fMask = RBBIM_SIZE | RBBIM_CHILDSIZE | RBBIM_STYLE | RBBIM_CHILD | RBBIM_IDEALSIZE | RBBIM_ID;
 617         rb.fStyle = RBBS_NOGRIPPER | RBBS_VARIABLEHEIGHT;
 618         rb.hwndChild = hStatic;
 619         rb.cyChild = rb.cyMinChild = 22;
 620         rb.cx = rb.cxMinChild = 90;
 621         rb.cxIdeal = 100;
 622         rb.wID = BANDID_PREVIEW_BUFFER;
 623
 624         SendMessageW(hReBar, RB_INSERTBANDW, -1, (LPARAM)&rb);
 625     } else
 626     {
 627         for(i = 0; i <= PREVIEW_BUTTONS; i++)
 628             SendMessageW(hReBar, RB_DELETEBAND, SendMessageW(hReBar, RB_IDTOINDEX, BANDID_PREVIEW_BTN1+i, 0), 0);
 629     }
 630 }
 631
 632 static const int min_spacing = 10;
 633
 634 static void update_preview_scrollbars(HWND hwndPreview, RECT *window)
 635 {
 636     SCROLLINFO sbi;
 637     sbi.cbSize = sizeof(sbi);
 638     sbi.fMask = SIF_PAGE|SIF_RANGE;
 639     sbi.nMin = 0;
 640     if (preview.zoomlevel == 0)
 641     {
 642         /* Hide scrollbars when zoomed out. */
 643         sbi.nMax = 0;
 644         sbi.nPage = window->right;
 645         SetScrollInfo(hwndPreview, SB_HORZ, &sbi, TRUE);
 646         sbi.nPage = window->bottom;
 647         SetScrollInfo(hwndPreview, SB_VERT, &sbi, TRUE);
 648     } else {
 649         sbi.nMax = preview.bmScaledSize.cx * preview.pages_shown +
 650                    min_spacing * (preview.pages_shown + 1);
 651         sbi.nPage = window->right;
 652         SetScrollInfo(hwndPreview, SB_HORZ, &sbi, TRUE);
 653         /* Change in the horizontal scrollbar visibility affects the
 654          * client rect, so update the client rect. */
 655         GetClientRect(hwndPreview, window);
 656         sbi.nMax = preview.bmScaledSize.cy + min_spacing * 2;
 657         sbi.nPage = window->bottom;
 658         SetScrollInfo(hwndPreview, SB_VERT, &sbi, TRUE);
 659     }
 660 }
 661
 662 static void update_preview_sizes(HWND hwndPreview, BOOL zoomLevelUpdated)
 663 {
 664     RECT window;
 665
 666     GetClientRect(hwndPreview, &window);
 667
 668     /* The zoom ratio isn't updated for partial zoom because of resizing the window. */
 669     if (zoomLevelUpdated || preview.zoomlevel != 1)
 670     {
 671         float ratio, ratioHeight, ratioWidth;
 672         if (preview.zoomlevel == 2)
 673         {
 674             ratio = 1.0;
 675         } else {
 676             ratioHeight = (window.bottom - min_spacing * 2) / (float)preview.bmSize.cy;
 677
 678             ratioWidth = (float)(window.right -
 679                                  min_spacing * (preview.pages_shown + 1)) /
 680                          (preview.pages_shown * preview.bmSize.cx);
 681
 682             if(ratioWidth > ratioHeight)
 683                 ratio = ratioHeight;
 684             else
 685                 ratio = ratioWidth;
 686
 687             if (preview.zoomlevel == 1)
 688                 ratio += (1.0 - ratio) / 2;
 689         }
 690         preview.zoomratio = ratio;
 691     }
 692
 693     preview.bmScaledSize.cx = preview.bmSize.cx * preview.zoomratio;
 694     preview.bmScaledSize.cy = preview.bmSize.cy * preview.zoomratio;
 695
 696     preview.spacing.cy = max(min_spacing, (window.bottom - preview.bmScaledSize.cy) / 2);
 697
 698     preview.spacing.cx = (window.right -
 699                           preview.bmScaledSize.cx * preview.pages_shown) /
 700                          (preview.pages_shown + 1);
 701     if (preview.spacing.cx < min_spacing)
 702         preview.spacing.cx = min_spacing;
 703
 704     update_preview_scrollbars(hwndPreview, &window);
 705 }
 706
 707 static void draw_margin_lines(HDC hdc, int x, int y, float ratio)
 708 {
 709     HPEN hPen, oldPen;
 710     SIZE dpi;
 711     RECT page_margin = preview.rcPage;
 712
 713     dpi.cx = GetDeviceCaps(hdc, LOGPIXELSX);
 714     dpi.cy = GetDeviceCaps(hdc, LOGPIXELSY);
 715
 716     page_margin.left = preview.rcPage.left + margins.left;
 717     page_margin.top = preview.rcPage.top + margins.top;
 718     page_margin.bottom = preview.rcPage.bottom - margins.bottom;
 719     page_margin.right = preview.rcPage.right - margins.right;
 720
 721     page_margin.left = (int)((float)twips_to_pixels(page_margin.left, dpi.cx) * ratio);
 722     page_margin.top = (int)((float)twips_to_pixels(page_margin.top, dpi.cy) * ratio);
 723     page_margin.bottom = (int)((float)twips_to_pixels(page_margin.bottom, dpi.cy) * ratio);
 724     page_margin.right = (int)((float)twips_to_pixels(page_margin.right, dpi.cx) * ratio);
 725
 726     OffsetRect(&page_margin, x, y);
 727
 728     hPen = CreatePen(PS_DOT, 1, RGB(0,0,0));
 729     oldPen = SelectObject(hdc, hPen);
 730
 731     MoveToEx(hdc, x, page_margin.top, NULL);
 732     LineTo(hdc, x + preview.bmScaledSize.cx, page_margin.top);
 733     MoveToEx(hdc, x, page_margin.bottom, NULL);
 734     LineTo(hdc, x + preview.bmScaledSize.cx, page_margin.bottom);
 735
 736     MoveToEx(hdc, page_margin.left, y, NULL);
 737     LineTo(hdc, page_margin.left, y + preview.bmScaledSize.cy);
 738     MoveToEx(hdc, page_margin.right, y, NULL);
 739     LineTo(hdc, page_margin.right, y + preview.bmScaledSize.cy);
 740
 741     SelectObject(hdc, oldPen);
 742     DeleteObject(hPen);
 743 }
 744
 745 static BOOL is_last_preview_page(int page)
 746 {
 747     return preview.pageEnds[page - 1] >= preview.textlength;
 748 }
 749
 750 void init_preview(HWND hMainWnd, LPWSTR wszFileName)
 751 {
 752     HINSTANCE hInstance = GetModuleHandleW(0);
 753     preview.page = 1;
 754     preview.hdc = 0;
 755     preview.hdc2 = 0;
 756     preview.wszFileName = wszFileName;
 757     preview.zoomratio = 0;
 758     preview.zoomlevel = 0;
 759     preview_bar_show(hMainWnd, TRUE);
 760
 761     CreateWindowExW(0, wszPreviewWndClass, NULL,
 762             WS_VISIBLE | WS_CHILD | WS_VSCROLL | WS_HSCROLL,
 763             0, 0, 200, 10, hMainWnd, (HMENU)IDC_PREVIEW, hInstance, NULL);
 764 }
 765
 766 void close_preview(HWND hMainWnd)
 767 {
 768     HWND hwndPreview = GetDlgItem(hMainWnd, IDC_PREVIEW);
 769     preview.window.right = 0;
 770     preview.window.bottom = 0;
 771     preview.page = 0;
 772     HeapFree(GetProcessHeap(), 0, preview.pageEnds);
 773     preview.pageEnds = NULL;
 774     preview.pageCapacity = 0;
 775     if (preview.zoomlevel > 0)
 776         preview.pages_shown = preview.saved_pages_shown;
 777     if(preview.hdc) {
 778         HBITMAP oldbm = GetCurrentObject(preview.hdc, OBJ_BITMAP);
 779         DeleteDC(preview.hdc);
 780         DeleteObject(oldbm);
 781         preview.hdc = NULL;
 782     }
 783     if(preview.hdc2) {
 784         HBITMAP oldbm = GetCurrentObject(preview.hdc2, OBJ_BITMAP);
 785         DeleteDC(preview.hdc2);
 786         DeleteObject(oldbm);
 787         preview.hdc2 = NULL;
 788     }
 789
 790     preview_bar_show(hMainWnd, FALSE);
 791     DestroyWindow(hwndPreview);
 792 }
 793
 794 BOOL preview_isactive(void)
 795 {
 796     return preview.page != 0;
 797 }
 798
 799 static void draw_preview(HWND hEditorWnd, FORMATRANGE* lpFr, RECT* paper, int page)
 800 {
 801     int bottom;
 802
 803     if (!preview.pageEnds)
 804     {
 805         preview.pageCapacity = 32;
 806         preview.pageEnds = HeapAlloc(GetProcessHeap(), 0,
 807                                     sizeof(int) * preview.pageCapacity);
 808         if (!preview.pageEnds) return;
 809     } else if (page >= preview.pageCapacity) {
 810         int *new_buffer;
 811         new_buffer = HeapReAlloc(GetProcessHeap(), 0, preview.pageEnds,
 812                                  sizeof(int) * preview.pageCapacity * 2);
 813         if (!new_buffer) return;
 814         preview.pageCapacity *= 2;
 815         preview.pageEnds = new_buffer;
 816     }
 817
 818     FillRect(lpFr->hdc, paper, GetStockObject(WHITE_BRUSH));
 819     if (page > 1 && is_last_preview_page(page - 1)) return;
 820     lpFr->chrg.cpMin = page <= 1 ? 0 : preview.pageEnds[page-2];
 821     bottom = lpFr->rc.bottom;
 822     preview.pageEnds[page-1] = SendMessageW(hEditorWnd, EM_FORMATRANGE, TRUE, (LPARAM)lpFr);
 823
 824     /* EM_FORMATRANGE sets fr.rc.bottom to indicate the area printed in,
 825      * but we want to keep the original for drawing margins */
 826     lpFr->rc.bottom = bottom;
 827     SendMessageW(hEditorWnd, EM_FORMATRANGE, FALSE, 0);
 828 }
 829
 830 static void update_preview_buttons(HWND hMainWnd)
 831 {
 832     HWND hReBar = GetDlgItem(hMainWnd, IDC_REBAR);
 833     EnableWindow(GetDlgItem(hReBar, ID_PREVIEW_PREVPAGE), preview.page > 1);
 834     EnableWindow(GetDlgItem(hReBar, ID_PREVIEW_NEXTPAGE),
 835                  !is_last_preview_page(preview.page) &&
 836                  !is_last_preview_page(preview.page + preview.pages_shown - 1));
 837     EnableWindow(GetDlgItem(hReBar, ID_PREVIEW_NUMPAGES),
 838                  preview.pages_shown > 1 ||
 839                  (!is_last_preview_page(1) && preview.zoomlevel == 0));
 840     EnableWindow(GetDlgItem(hReBar, ID_PREVIEW_ZOOMIN), preview.zoomlevel < 2);
 841     EnableWindow(GetDlgItem(hReBar, ID_PREVIEW_ZOOMOUT), preview.zoomlevel > 0);
 842 }
 843
 844 static LRESULT print_preview(HWND hwndPreview)
 845 {
 846     HPEN hPen, oldPen;
 847     HDC hdc;
 848     HRGN back_rgn, excl_rgn;
 849     RECT window, background;
 850     PAINTSTRUCT ps;
 851     int x, y;
 852
 853     hdc = BeginPaint(hwndPreview, &ps);
 854     GetClientRect(hwndPreview, &window);
 855     back_rgn = CreateRectRgnIndirect(&window);
 856
 857     x = preview.spacing.cx - GetScrollPos(hwndPreview, SB_HORZ);
 858     y = preview.spacing.cy - GetScrollPos(hwndPreview, SB_VERT);
 859
 860     /* draw page outlines */
 861     hPen = CreatePen(PS_SOLID|PS_INSIDEFRAME, 2, RGB(0,0,0));
 862     oldPen = SelectObject(hdc, hPen);
 863     background.left = x - 2;
 864     background.right = x + preview.bmScaledSize.cx + 2;
 865     background.top = y - 2;
 866     background.bottom = y + preview.bmScaledSize.cy + 2;
 867     Rectangle(hdc, background.left, background.top,
 868               background.right, background.bottom);
 869     excl_rgn = CreateRectRgnIndirect(&background);
 870     CombineRgn(back_rgn, back_rgn, excl_rgn, RGN_DIFF);
 871     if(preview.pages_shown > 1)
 872     {
 873         background.left += preview.bmScaledSize.cx + preview.spacing.cx;
 874         background.right += preview.bmScaledSize.cx + preview.spacing.cx;
 875         Rectangle(hdc, background.left, background.top,
 876                   background.right, background.bottom);
 877         SetRectRgn(excl_rgn, background.left, background.top,
 878                    background.right, background.bottom);
 879         CombineRgn(back_rgn, back_rgn, excl_rgn, RGN_DIFF);
 880     }
 881     SelectObject(hdc, oldPen);
 882     DeleteObject(hPen);
 883     FillRgn(hdc, back_rgn, GetStockObject(GRAY_BRUSH));
 884     DeleteObject(excl_rgn);
 885     DeleteObject(back_rgn);
 886
 887     StretchBlt(hdc, x, y, preview.bmScaledSize.cx, preview.bmScaledSize.cy,
 888                preview.hdc, 0, 0, preview.bmSize.cx, preview.bmSize.cy, SRCCOPY);
 889
 890     draw_margin_lines(hdc, x, y, preview.zoomratio);
 891
 892     if(preview.pages_shown > 1)
 893     {
 894         if (!is_last_preview_page(preview.page)) {
 895             x += preview.spacing.cx + preview.bmScaledSize.cx;
 896             StretchBlt(hdc, x, y,
 897                        preview.bmScaledSize.cx, preview.bmScaledSize.cy,
 898                        preview.hdc2, 0, 0,
 899                        preview.bmSize.cx, preview.bmSize.cy, SRCCOPY);
 900
 901             draw_margin_lines(hdc, x, y, preview.zoomratio);
 902         } else {
 903             background.left += 2;
 904             background.right -= 2;
 905             background.top += 2;
 906             background.bottom -= 2;
 907             FillRect(hdc, &background, GetStockObject(WHITE_BRUSH));
 908         }
 909     }
 910
 911     preview.window = window;
 912
 913     EndPaint(hwndPreview, &ps);
 914
 915     return 0;
 916 }
 917
 918 static void update_preview_statusbar(HWND hMainWnd)
 919 {
 920     HWND hStatusbar = GetDlgItem(hMainWnd, IDC_STATUSBAR);
 921     HINSTANCE hInst = GetModuleHandleW(0);
 922     WCHAR *p;
 923     WCHAR wstr[MAX_STRING_LEN];
 924
 925     p = wstr;
 926     if (preview.pages_shown < 2 || is_last_preview_page(preview.page))
 927     {
 928         static const WCHAR fmt[] = {' ','%','d','\0'};
 929         p += LoadStringW(hInst, STRING_PREVIEW_PAGE, wstr, MAX_STRING_LEN);
 930         wsprintfW(p, fmt, preview.page);
 931     } else {
 932         static const WCHAR fmt[] = {' ','%','d','-','%','d','\0'};
 933         p += LoadStringW(hInst, STRING_PREVIEW_PAGES, wstr, MAX_STRING_LEN);
 934         wsprintfW(p, fmt, preview.page, preview.page + 1);
 935     }
 936     SetWindowTextW(hStatusbar, wstr);
 937 }
 938
 939 /* Update for page changes. */
 940 static void update_preview(HWND hMainWnd)
 941 {
 942     RECT paper;
 943     HWND hEditorWnd = GetDlgItem(hMainWnd, IDC_EDITOR);
 944     HWND hwndPreview = GetDlgItem(hMainWnd, IDC_PREVIEW);
 945     HBITMAP hBitmapCapture;
 946     FORMATRANGE fr;
 947     HDC hdc = GetDC(hwndPreview);
 948
 949     fr.hdcTarget = make_dc();
 950     fr.rc = fr.rcPage = preview.rcPage;
 951     fr.rc.left += margins.left;
 952     fr.rc.top += margins.top;
 953     fr.rc.bottom -= margins.bottom;
 954     fr.rc.right -= margins.right;
 955
 956     fr.chrg.cpMin = 0;
 957     fr.chrg.cpMax = preview.textlength;
 958
 959     paper.left = 0;
 960     paper.right = preview.bmSize.cx;
 961     paper.top = 0;
 962     paper.bottom = preview.bmSize.cy;
 963
 964     if (!preview.hdc) {
 965         preview.hdc = CreateCompatibleDC(hdc);
 966         hBitmapCapture = CreateCompatibleBitmap(hdc, preview.bmSize.cx, preview.bmSize.cy);
 967         SelectObject(preview.hdc, hBitmapCapture);
 968     }
 969
 970     fr.hdc = preview.hdc;
 971     draw_preview(hEditorWnd, &fr, &paper, preview.page);
 972
 973     if(preview.pages_shown > 1)
 974     {
 975         if (!preview.hdc2)
 976         {
 977             preview.hdc2 = CreateCompatibleDC(hdc);
 978             hBitmapCapture = CreateCompatibleBitmap(hdc,
 979                                                     preview.bmSize.cx,
 980                                                     preview.bmSize.cy);
 981             SelectObject(preview.hdc2, hBitmapCapture);
 982         }
 983
 984         fr.hdc = preview.hdc2;
 985         draw_preview(hEditorWnd, &fr, &fr.rcPage, preview.page + 1);
 986     }
 987     DeleteDC(fr.hdcTarget);
 988     ReleaseDC(hwndPreview, hdc);
 989
 990     InvalidateRect(hwndPreview, NULL, FALSE);
 991     update_preview_buttons(hMainWnd);
 992     update_preview_statusbar(hMainWnd);
 993 }
 994
 995 static void toggle_num_pages(HWND hMainWnd)
 996 {
 997     HWND hReBar = GetDlgItem(hMainWnd, IDC_REBAR);
 998     WCHAR name[MAX_STRING_LEN];
 999     HINSTANCE hInst = GetModuleHandleW(0);
1000     int nPreviewPages;
1001
1002     preview.pages_shown = preview.pages_shown > 1 ? 1 : 2;
1003
1004     nPreviewPages = preview.zoomlevel > 0 ? preview.saved_pages_shown :
1005                                             preview.pages_shown;
1006
1007     LoadStringW(hInst, nPreviewPages > 1 ? STRING_PREVIEW_ONEPAGE :
1008                                            STRING_PREVIEW_TWOPAGES,
1009                 name, MAX_STRING_LEN);
1010
1011     SetWindowTextW(GetDlgItem(hReBar, ID_PREVIEW_NUMPAGES), name);
1012     update_preview_sizes(GetDlgItem(hMainWnd, IDC_PREVIEW), TRUE);
1013     update_preview(hMainWnd);
1014 }
1015
1016 /* Returns the page shown that the point is in (1 or 2) or 0 if the point
1017  * isn't inside either page */
1018 static int preview_page_hittest(POINT pt)
1019 {
1020     RECT rc;
1021     rc.left = preview.spacing.cx;
1022     rc.right = rc.left + preview.bmScaledSize.cx;
1023     rc.top = preview.spacing.cy;
1024     rc.bottom = rc.top + preview.bmScaledSize.cy;
1025     if (PtInRect(&rc, pt))
1026         return 1;
1027
1028     if (preview.pages_shown <= 1)
1029         return 0;
1030
1031     rc.left += preview.bmScaledSize.cx + preview.spacing.cx;
1032     rc.right += preview.bmScaledSize.cx + preview.spacing.cx;
1033     if (PtInRect(&rc, pt))
1034         return is_last_preview_page(preview.page) ? 1 : 2;
1035
1036     return 0;
1037 }
1038
1039 LRESULT CALLBACK preview_proc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
1040 {
1041     switch(msg)
1042     {
1043         case WM_CREATE:
1044         {
1045             HWND hMainWnd = GetParent(hWnd);
1046             HWND hEditorWnd = GetDlgItem(hMainWnd, IDC_EDITOR);
1047             FORMATRANGE fr;
1048             GETTEXTLENGTHEX gt = {GTL_DEFAULT, 1200};
1049             HDC hdc = GetDC(hWnd);
1050             HDC hdcTarget = make_dc();
1051
1052             fr.rc = preview.rcPage = get_print_rect(hdcTarget);
1053             preview.rcPage.bottom += margins.bottom;
1054             preview.rcPage.right += margins.right;
1055             preview.rcPage.top = preview.rcPage.left = 0;
1056             fr.rcPage = preview.rcPage;
1057
1058             preview.bmSize.cx = twips_to_pixels(preview.rcPage.right, GetDeviceCaps(hdc, LOGPIXELSX));
1059             preview.bmSize.cy = twips_to_pixels(preview.rcPage.bottom, GetDeviceCaps(hdc, LOGPIXELSY));
1060
1061             preview.textlength = SendMessageW(hEditorWnd, EM_GETTEXTLENGTHEX, (WPARAM)&gt, 0);
1062
1063             fr.hdc = CreateCompatibleDC(hdc);
1064             fr.hdcTarget = hdcTarget;
1065             fr.chrg.cpMin = 0;
1066             fr.chrg.cpMax = preview.textlength;
1067             DeleteDC(fr.hdc);
1068             DeleteDC(hdcTarget);
1069             ReleaseDC(hWnd, hdc);
1070
1071             update_preview_sizes(hWnd, TRUE);
1072             update_preview(hMainWnd);
1073             break;
1074         }
1075
1076         case WM_PAINT:
1077             return print_preview(hWnd);
1078
1079         case WM_SIZE:
1080         {
1081             update_preview_sizes(hWnd, FALSE);
1082             InvalidateRect(hWnd, NULL, FALSE);
1083             break;
1084         }
1085
1086         case WM_VSCROLL:
1087         case WM_HSCROLL:
1088         {
1089             SCROLLINFO si;
1090             RECT rc;
1091             int nBar = (msg == WM_VSCROLL) ? SB_VERT : SB_HORZ;
1092             int origPos;
1093
1094             GetClientRect(hWnd, &rc);
1095             si.cbSize = sizeof(si);
1096             si.fMask = SIF_ALL;
1097             GetScrollInfo(hWnd, nBar, &si);
1098             origPos = si.nPos;
1099             switch(LOWORD(wParam))
1100             {
1101                 case SB_TOP: /* == SB_LEFT */
1102                     si.nPos = si.nMin;
1103                     break;
1104                 case SB_BOTTOM: /* == SB_RIGHT */
1105                     si.nPos = si.nMax;
1106                     break;
1107                 case SB_LINEUP: /* == SB_LINELEFT */
1108                     si.nPos -= si.nPage / 10;
1109                     break;
1110                 case SB_LINEDOWN: /* == SB_LINERIGHT */
1111                     si.nPos += si.nPage / 10;
1112                     break;
1113                 case SB_PAGEUP: /* == SB_PAGELEFT */
1114                     si.nPos -= si.nPage;
1115                     break;
1116                 case SB_PAGEDOWN: /* SB_PAGERIGHT */
1117                     si.nPos += si.nPage;
1118                     break;
1119                 case SB_THUMBTRACK:
1120                     si.nPos = si.nTrackPos;
1121                     break;
1122             }
1123             si.fMask = SIF_POS;
1124             SetScrollInfo(hWnd, nBar, &si, TRUE);
1125             GetScrollInfo(hWnd, nBar, &si);
1126             if (si.nPos != origPos)
1127             {
1128                 int amount = origPos - si.nPos;
1129                 if (msg == WM_VSCROLL)
1130                     ScrollWindow(hWnd, 0, amount, NULL, NULL);
1131                 else
1132                     ScrollWindow(hWnd, amount, 0, NULL, NULL);
1133             }
1134             return 0;
1135         }
1136
1137         case WM_SETCURSOR:
1138         {
1139             POINT pt;
1140             RECT rc;
1141             int bHittest = 0;
1142             DWORD messagePos = GetMessagePos();
1143             pt.x = (short)LOWORD(messagePos);
1144             pt.y = (short)HIWORD(messagePos);
1145             ScreenToClient(hWnd, &pt);
1146
1147             GetClientRect(hWnd, &rc);
1148             if (PtInRect(&rc, pt))
1149             {
1150                 pt.x += GetScrollPos(hWnd, SB_HORZ);
1151                 pt.y += GetScrollPos(hWnd, SB_VERT);
1152                 bHittest = preview_page_hittest(pt);
1153             }
1154
1155             if (bHittest)
1156                 SetCursor(LoadCursorW(GetModuleHandleW(0),
1157                                       MAKEINTRESOURCEW(IDC_ZOOM)));
1158             else
1159                 SetCursor(LoadCursorW(NULL, (WCHAR*)IDC_ARROW));
1160
1161             return TRUE;
1162         }
1163
1164         case WM_LBUTTONDOWN:
1165         {
1166             int page;
1167             POINT pt;
1168             pt.x = (short)LOWORD(lParam) + GetScrollPos(hWnd, SB_HORZ);
1169             pt.y = (short)HIWORD(lParam) + GetScrollPos(hWnd, SB_VERT);
1170             if ((page = preview_page_hittest(pt)) > 0)
1171             {
1172                 HWND hMainWnd = GetParent(hWnd);
1173
1174                 /* Convert point from client coordinate to unzoomed page
1175                  * coordinate. */
1176                 pt.x -= preview.spacing.cx;
1177                 if (page > 1)
1178                     pt.x -= preview.bmScaledSize.cx + preview.spacing.cx;
1179                 pt.y -= preview.spacing.cy;
1180                 pt.x /= preview.zoomratio;
1181                 pt.y /= preview.zoomratio;
1182
1183                 if (preview.zoomlevel == 0)
1184                     preview.saved_pages_shown = preview.pages_shown;
1185                 preview.zoomlevel = (preview.zoomlevel + 1) % 3;
1186                 preview.zoomratio = 0;
1187                 if (preview.zoomlevel == 0 && preview.saved_pages_shown > 1)
1188                 {
1189                     toggle_num_pages(hMainWnd);
1190                 } else if (preview.pages_shown > 1) {
1191                     if (page >= 2) preview.page++;
1192                     toggle_num_pages(hMainWnd);
1193                 } else {
1194                     update_preview_sizes(hWnd, TRUE);
1195                     InvalidateRect(hWnd, NULL, FALSE);
1196                     update_preview_buttons(hMainWnd);
1197                 }
1198
1199                 if (preview.zoomlevel > 0) {
1200                     SCROLLINFO si;
1201                     /* Convert the coordinate back to client coordinate. */
1202                     pt.x *= preview.zoomratio;
1203                     pt.y *= preview.zoomratio;
1204                     pt.x += preview.spacing.cx;
1205                     pt.y += preview.spacing.cy;
1206                     /* Scroll to center view at that point on the page */
1207                     si.cbSize = sizeof(si);
1208                     si.fMask = SIF_PAGE;
1209                     GetScrollInfo(hWnd, SB_HORZ, &si);
1210                     pt.x -= si.nPage / 2;
1211                     SetScrollPos(hWnd, SB_HORZ, pt.x, TRUE);
1212                     GetScrollInfo(hWnd, SB_VERT, &si);
1213                     pt.y -= si.nPage / 2;
1214                     SetScrollPos(hWnd, SB_VERT, pt.y, TRUE);
1215                 }
1216             }
1217         }
1218
1219         default:
1220             return DefWindowProcW(hWnd, msg, wParam, lParam);
1221     }
1222
1223     return 0;
1224 }
1225
1226 LRESULT preview_command(HWND hWnd, WPARAM wParam)
1227 {
1228     switch(LOWORD(wParam))
1229     {
1230         case ID_FILE_EXIT:
1231             PostMessageW(hWnd, WM_CLOSE, 0, 0);
1232             break;
1233
1234         case ID_PREVIEW_NEXTPAGE:
1235         case ID_PREVIEW_PREVPAGE:
1236         {
1237             if(LOWORD(wParam) == ID_PREVIEW_NEXTPAGE)
1238                 preview.page++;
1239             else
1240                 preview.page--;
1241
1242             update_preview(hWnd);
1243         }
1244         break;
1245
1246         case ID_PREVIEW_NUMPAGES:
1247             toggle_num_pages(hWnd);
1248             break;
1249
1250         case ID_PREVIEW_ZOOMIN:
1251             if (preview.zoomlevel < 2)
1252             {
1253                 if (preview.zoomlevel == 0)
1254                     preview.saved_pages_shown = preview.pages_shown;
1255                 preview.zoomlevel++;
1256                 preview.zoomratio = 0;
1257                 if (preview.pages_shown > 1)
1258                 {
1259                     /* Forced switch to one page when zooming in. */
1260                     toggle_num_pages(hWnd);
1261                 } else {
1262                     HWND hwndPreview = GetDlgItem(hWnd, IDC_PREVIEW);
1263                     update_preview_sizes(hwndPreview, TRUE);
1264                     InvalidateRect(hwndPreview, NULL, FALSE);
1265                     update_preview_buttons(hWnd);
1266                 }
1267             }
1268             break;
1269
1270         case ID_PREVIEW_ZOOMOUT:
1271             if (preview.zoomlevel > 0)
1272             {
1273                 HWND hwndPreview = GetDlgItem(hWnd, IDC_PREVIEW);
1274                 preview.zoomlevel--;
1275                 preview.zoomratio = 0;
1276                 if (preview.zoomlevel == 0 && preview.saved_pages_shown > 1) {
1277                     toggle_num_pages(hWnd);
1278                 } else {
1279                     update_preview_sizes(hwndPreview, TRUE);
1280                     InvalidateRect(hwndPreview, NULL, FALSE);
1281                     update_preview_buttons(hWnd);
1282                 }
1283             }
1284             break;
1285
1286         case ID_PRINT:
1287             dialog_print(hWnd, preview.wszFileName);
1288             SendMessageW(hWnd, WM_CLOSE, 0, 0);
1289             break;
1290     }
1291
1292     return 0;
1293 }