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
  25 #include "wordpad.h"
  26
  27 typedef struct _previewinfo
  28 {
  29     int page;
  30     int pages_shown;
  31     int saved_pages_shown;
  32     int *pageEnds, pageCapacity;
  33     int textlength;
  34     HDC hdc;
  35     HDC hdc2;
  36     HDC hdcSized;
  37     HDC hdcSized2;
  38     RECT window;
  39     RECT rcPage;
  40     SIZE bmSize;
  41     SIZE bmScaledSize;
  42     SIZE spacing;
  43     float zoomratio;
  44     int zoomlevel;
  45     LPWSTR wszFileName;
  46 } previewinfo, *ppreviewinfo;
  47
  48 static HGLOBAL devMode;
  49 static HGLOBAL devNames;
  50
  51 static RECT margins;
  52 static previewinfo preview;
  53
  54 extern const WCHAR wszPreviewWndClass[];
  55
  56 static const WCHAR var_pagemargin[] = {'P','a','g','e','M','a','r','g','i','n',0};
  57 static const WCHAR var_previewpages[] = {'P','r','e','v','i','e','w','P','a','g','e','s',0};
  58
  59 static LPWSTR get_print_file_filter(HWND hMainWnd)
  60 {
  61     static WCHAR wszPrintFilter[MAX_STRING_LEN*2+6+4+1];
  62     const WCHAR files_prn[] = {'*','.','P','R','N',0};
  63     const WCHAR files_all[] = {'*','.','*','\0'};
  64     LPWSTR p;
  65     HINSTANCE hInstance = GetModuleHandleW(0);
  66
  67     p = wszPrintFilter;
  68     LoadStringW(hInstance, STRING_PRINTER_FILES_PRN, p, MAX_STRING_LEN);
  69     p += lstrlenW(p) + 1;
  70     lstrcpyW(p, files_prn);
  71     p += lstrlenW(p) + 1;
  72     LoadStringW(hInstance, STRING_ALL_FILES, p, MAX_STRING_LEN);
  73     p += lstrlenW(p) + 1;
  74     lstrcpyW(p, files_all);
  75     p += lstrlenW(p) + 1;
  76     *p = 0;
  77
  78     return wszPrintFilter;
  79 }
  80
  81 void registry_set_pagemargins(HKEY hKey)
  82 {
  83     RegSetValueExW(hKey, var_pagemargin, 0, REG_BINARY, (LPBYTE)&margins, sizeof(RECT));
  84 }
  85
  86 void registry_read_pagemargins(HKEY hKey)
  87 {
  88     DWORD size = sizeof(RECT);
  89
  90     if(!hKey || RegQueryValueExW(hKey, var_pagemargin, 0, NULL, (LPBYTE)&margins,
  91                      &size) != ERROR_SUCCESS || size != sizeof(RECT))
  92     {
  93         margins.top = 1417;
  94         margins.bottom = 1417;
  95         margins.left = 1757;
  96         margins.right = 1757;
  97     }
  98 }
  99
 100 void registry_set_previewpages(HKEY hKey)
 101 {
 102     RegSetValueExW(hKey, var_previewpages, 0, REG_DWORD,
 103                    (LPBYTE)&preview.pages_shown, sizeof(DWORD));
 104 }
 105
 106 void registry_read_previewpages(HKEY hKey)
 107 {
 108     DWORD size = sizeof(DWORD);
 109     if(!hKey ||
 110        RegQueryValueExW(hKey, var_previewpages, 0, NULL,
 111                         (LPBYTE)&preview.pages_shown, &size) != ERROR_SUCCESS ||
 112        size != sizeof(DWORD))
 113     {
 114         preview.pages_shown = 1;
 115     } else {
 116         if (preview.pages_shown < 1) preview.pages_shown = 1;
 117         else if (preview.pages_shown > 2) preview.pages_shown = 2;
 118     }
 119 }
 120
 121
 122 static void AddTextButton(HWND hRebarWnd, UINT string, UINT command, UINT id)
 123 {
 124     REBARBANDINFOW rb;
 125     HINSTANCE hInstance = GetModuleHandleW(0);
 126     WCHAR text[MAX_STRING_LEN];
 127     HWND hButton;
 128
 129     LoadStringW(hInstance, string, text, MAX_STRING_LEN);
 130     hButton = CreateWindowW(WC_BUTTONW, text,
 131                             WS_VISIBLE | WS_CHILD, 5, 5, 100, 15,
 132                             hRebarWnd, ULongToHandle(command), hInstance, NULL);
 133
 134     rb.cbSize = REBARBANDINFOW_V6_SIZE;
 135     rb.fMask = RBBIM_SIZE | RBBIM_CHILDSIZE | RBBIM_STYLE | RBBIM_CHILD | RBBIM_IDEALSIZE | RBBIM_ID;
 136     rb.fStyle = RBBS_NOGRIPPER | RBBS_VARIABLEHEIGHT;
 137     rb.hwndChild = hButton;
 138     rb.cyChild = rb.cyMinChild = 22;
 139     rb.cx = rb.cxMinChild = 90;
 140     rb.cxIdeal = 100;
 141     rb.wID = id;
 142
 143     SendMessageW(hRebarWnd, RB_INSERTBAND, -1, (LPARAM)&rb);
 144 }
 145
 146 static HDC make_dc(void)
 147 {
 148     if(devNames && devMode)
 149     {
 150         LPDEVNAMES dn = GlobalLock(devNames);
 151         LPDEVMODEW dm = GlobalLock(devMode);
 152         HDC ret;
 153
 154         ret = CreateDCW((LPWSTR)dn + dn->wDriverOffset,
 155                          (LPWSTR)dn + dn->wDeviceOffset, 0, dm);
 156
 157         GlobalUnlock(dn);
 158         GlobalUnlock(dm);
 159
 160         return ret;
 161     } else
 162     {
 163         return 0;
 164     }
 165 }
 166
 167 static LONG twips_to_centmm(int twips)
 168 {
 169     return MulDiv(twips, CENTMM_PER_INCH, TWIPS_PER_INCH);
 170 }
 171
 172 static LONG centmm_to_twips(int mm)
 173 {
 174     return MulDiv(mm, TWIPS_PER_INCH, CENTMM_PER_INCH);
 175 }
 176
 177 static LONG twips_to_pixels(int twips, int dpi)
 178 {
 179     return MulDiv(twips, dpi, TWIPS_PER_INCH);
 180 }
 181
 182 static LONG devunits_to_twips(int units, int dpi)
 183 {
 184     return MulDiv(units, TWIPS_PER_INCH, dpi);
 185 }
 186
 187
 188 static RECT get_print_rect(HDC hdc)
 189 {
 190     RECT rc;
 191     int width, height;
 192
 193     if(hdc)
 194     {
 195         int dpiY = GetDeviceCaps(hdc, LOGPIXELSY);
 196         int dpiX = GetDeviceCaps(hdc, LOGPIXELSX);
 197         width = devunits_to_twips(GetDeviceCaps(hdc, PHYSICALWIDTH), dpiX);
 198         height = devunits_to_twips(GetDeviceCaps(hdc, PHYSICALHEIGHT), dpiY);
 199     } else
 200     {
 201         width = centmm_to_twips(18500);
 202         height = centmm_to_twips(27000);
 203     }
 204
 205     rc.left = margins.left;
 206     rc.right = width - margins.right;
 207     rc.top = margins.top;
 208     rc.bottom = height - margins.bottom;
 209
 210     return rc;
 211 }
 212
 213 void target_device(HWND hMainWnd, DWORD wordWrap)
 214 {
 215     HWND hEditorWnd = GetDlgItem(hMainWnd, IDC_EDITOR);
 216
 217     if(wordWrap == ID_WORDWRAP_MARGIN)
 218     {
 219         int width = 0;
 220         LRESULT result;
 221         HDC hdc = make_dc();
 222         RECT rc = get_print_rect(hdc);
 223
 224         width = rc.right - rc.left;
 225         if(!hdc)
 226         {
 227             HDC hMaindc = GetDC(hMainWnd);
 228             hdc = CreateCompatibleDC(hMaindc);
 229             ReleaseDC(hMainWnd, hMaindc);
 230         }
 231         result = SendMessageW(hEditorWnd, EM_SETTARGETDEVICE, (WPARAM)hdc, width);
 232         DeleteDC(hdc);
 233         if (result)
 234             return;
 235         /* otherwise EM_SETTARGETDEVICE failed, so fall back on wrapping
 236          * to window using the NULL DC. */
 237     }
 238
 239     if (wordWrap != ID_WORDWRAP_NONE) {
 240         SendMessageW(hEditorWnd, EM_SETTARGETDEVICE, 0, 0);
 241     } else {
 242         SendMessageW(hEditorWnd, EM_SETTARGETDEVICE, 0, 1);
 243     }
 244
 245 }
 246
 247 static LPWSTR dialog_print_to_file(HWND hMainWnd)
 248 {
 249     OPENFILENAMEW ofn;
 250     static WCHAR file[MAX_PATH] = {'O','U','T','P','U','T','.','P','R','N',0};
 251     static const WCHAR defExt[] = {'P','R','N',0};
 252     static LPWSTR file_filter;
 253
 254     if(!file_filter)
 255         file_filter = get_print_file_filter(hMainWnd);
 256
 257     ZeroMemory(&ofn, sizeof(ofn));
 258
 259     ofn.lStructSize = sizeof(ofn);
 260     ofn.Flags = OFN_PATHMUSTEXIST | OFN_HIDEREADONLY | OFN_OVERWRITEPROMPT;
 261     ofn.hwndOwner = hMainWnd;
 262     ofn.lpstrFilter = file_filter;
 263     ofn.lpstrFile = file;
 264     ofn.nMaxFile = MAX_PATH;
 265     ofn.lpstrDefExt = defExt;
 266
 267     if(GetSaveFileNameW(&ofn))
 268         return file;
 269     else
 270         return FALSE;
 271 }
 272
 273 static void char_from_pagenum(HWND hEditorWnd, FORMATRANGE *fr, int page)
 274 {
 275     int i;
 276
 277     fr->chrg.cpMin = 0;
 278
 279     for(i = 1; i < page; i++)
 280     {
 281         int bottom = fr->rc.bottom;
 282         fr->chrg.cpMin = SendMessageW(hEditorWnd, EM_FORMATRANGE, FALSE, (LPARAM)fr);
 283         fr->rc.bottom = bottom;
 284     }
 285 }
 286
 287 static HWND get_ruler_wnd(HWND hMainWnd)
 288 {
 289     return GetDlgItem(GetDlgItem(hMainWnd, IDC_REBAR), IDC_RULER);
 290 }
 291
 292 void redraw_ruler(HWND hRulerWnd)
 293 {
 294     RECT rc;
 295
 296     GetClientRect(hRulerWnd, &rc);
 297     InvalidateRect(hRulerWnd, &rc, TRUE);
 298 }
 299
 300 static void update_ruler(HWND hRulerWnd)
 301 {
 302      SendMessageW(hRulerWnd, WM_USER, 0, 0);
 303      redraw_ruler(hRulerWnd);
 304 }
 305
 306 static void add_ruler_units(HDC hdcRuler, RECT* drawRect, BOOL NewMetrics, LONG EditLeftmost)
 307 {
 308     static HDC hdc;
 309
 310     if(NewMetrics)
 311     {
 312         static HBITMAP hBitmap;
 313         int i, x, y, RulerTextEnd;
 314         int CmPixels;
 315         int QuarterCmPixels;
 316         HFONT hFont;
 317         WCHAR FontName[] = {'M','S',' ','S','a','n','s',' ','S','e','r','i','f',0};
 318
 319         if(hdc)
 320         {
 321             DeleteDC(hdc);
 322             DeleteObject(hBitmap);
 323         }
 324
 325         hdc = CreateCompatibleDC(0);
 326
 327         CmPixels = twips_to_pixels(centmm_to_twips(1000), GetDeviceCaps(hdc, LOGPIXELSX));
 328         QuarterCmPixels = (int)((float)CmPixels / 4.0);
 329
 330         hBitmap = CreateCompatibleBitmap(hdc, drawRect->right, drawRect->bottom);
 331         SelectObject(hdc, hBitmap);
 332         FillRect(hdc, drawRect, GetStockObject(WHITE_BRUSH));
 333
 334         hFont = CreateFontW(10, 6, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, FontName);
 335
 336         SelectObject(hdc, hFont);
 337         SetBkMode(hdc, TRANSPARENT);
 338         SetTextAlign(hdc, TA_CENTER);
 339         y = (int)(((float)drawRect->bottom - (float)drawRect->top) / 2.0) + 1;
 340         RulerTextEnd = drawRect->right - EditLeftmost + 1;
 341         for(i = 1, x = EditLeftmost; x < (drawRect->right - EditLeftmost + 1); i ++)
 342         {
 343             WCHAR str[3];
 344             WCHAR format[] = {'%','d',0};
 345             int x2 = x;
 346
 347             x2 += QuarterCmPixels;
 348             if(x2 > RulerTextEnd)
 349                 break;
 350
 351             MoveToEx(hdc, x2, y, NULL);
 352             LineTo(hdc, x2, y+2);
 353
 354             x2 += QuarterCmPixels;
 355             if(x2 > RulerTextEnd)
 356                 break;
 357
 358             MoveToEx(hdc, x2, y - 3, NULL);
 359             LineTo(hdc, x2, y + 3);
 360
 361             x2 += QuarterCmPixels;
 362             if(x2 > RulerTextEnd)
 363                 break;
 364
 365             MoveToEx(hdc, x2, y, NULL);
 366             LineTo(hdc, x2, y+2);
 367
 368             x += CmPixels;
 369             if(x > RulerTextEnd)
 370                 break;
 371
 372             wsprintfW(str, format, i);
 373             TextOutW(hdc, x, 5, str, lstrlenW(str));
 374         }
 375         DeleteObject(hFont);
 376     }
 377
 378     BitBlt(hdcRuler, 0, 0, drawRect->right, drawRect->bottom, hdc, 0, 0, SRCAND);
 379 }
 380
 381 static void paint_ruler(HWND hWnd, LONG EditLeftmost, BOOL NewMetrics)
 382 {
 383     PAINTSTRUCT ps;
 384     HDC hdc = BeginPaint(hWnd, &ps);
 385     HDC hdcPrint = make_dc();
 386     RECT printRect = get_print_rect(hdcPrint);
 387     RECT drawRect;
 388     HBRUSH hBrush = CreateSolidBrush(GetSysColor(COLOR_MENU));
 389
 390     GetClientRect(hWnd, &drawRect);
 391     FillRect(hdc, &drawRect, hBrush);
 392
 393     drawRect.top += 3;
 394     drawRect.bottom -= 3;
 395     drawRect.left = EditLeftmost;
 396     drawRect.right = twips_to_pixels(printRect.right - margins.left, GetDeviceCaps(hdc, LOGPIXELSX));
 397     FillRect(hdc, &drawRect, GetStockObject(WHITE_BRUSH));
 398
 399     drawRect.top--;
 400     drawRect.bottom++;
 401     DrawEdge(hdc, &drawRect, EDGE_SUNKEN, BF_RECT);
 402
 403     drawRect.left = drawRect.right - 1;
 404     drawRect.right = twips_to_pixels(printRect.right + margins.right - margins.left, GetDeviceCaps(hdc, LOGPIXELSX));
 405     DrawEdge(hdc, &drawRect, EDGE_ETCHED, BF_RECT);
 406
 407     drawRect.left = 0;
 408     drawRect.top = 0;
 409     add_ruler_units(hdc, &drawRect, NewMetrics, EditLeftmost);
 410
 411     SelectObject(hdc, GetStockObject(BLACK_BRUSH));
 412     DeleteObject(hBrush);
 413     DeleteDC(hdcPrint);
 414     EndPaint(hWnd, &ps);
 415 }
 416
 417 LRESULT CALLBACK ruler_proc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
 418 {
 419     static WNDPROC pPrevRulerProc;
 420     static LONG EditLeftmost;
 421     static BOOL NewMetrics;
 422
 423     switch(msg)
 424     {
 425         case WM_USER:
 426             if(wParam)
 427             {
 428                 EditLeftmost = ((POINTL*)wParam)->x;
 429                 pPrevRulerProc = (WNDPROC)lParam;
 430             }
 431             NewMetrics = TRUE;
 432             break;
 433
 434         case WM_PAINT:
 435             paint_ruler(hWnd, EditLeftmost, NewMetrics);
 436             break;
 437
 438         default:
 439             return CallWindowProcW(pPrevRulerProc, hWnd, msg, wParam, lParam);
 440     }
 441
 442     return 0;
 443 }
 444
 445 static void print(LPPRINTDLGW pd, LPWSTR wszFileName)
 446 {
 447     FORMATRANGE fr;
 448     DOCINFOW di;
 449     HWND hEditorWnd = GetDlgItem(pd->hwndOwner, IDC_EDITOR);
 450     int printedPages = 0;
 451
 452     fr.hdc = pd->hDC;
 453     fr.hdcTarget = pd->hDC;
 454
 455     fr.rc = get_print_rect(fr.hdc);
 456     fr.rcPage.left = 0;
 457     fr.rcPage.right = fr.rc.right + margins.right;
 458     fr.rcPage.top = 0;
 459     fr.rcPage.bottom = fr.rc.bottom + margins.bottom;
 460
 461     ZeroMemory(&di, sizeof(di));
 462     di.cbSize = sizeof(di);
 463     di.lpszDocName = wszFileName;
 464
 465     if(pd->Flags & PD_PRINTTOFILE)
 466     {
 467         di.lpszOutput = dialog_print_to_file(pd->hwndOwner);
 468         if(!di.lpszOutput)
 469             return;
 470     }
 471
 472     if(pd->Flags & PD_SELECTION)
 473     {
 474         SendMessageW(hEditorWnd, EM_EXGETSEL, 0, (LPARAM)&fr.chrg);
 475     } else
 476     {
 477         GETTEXTLENGTHEX gt;
 478         gt.flags = GTL_DEFAULT;
 479         gt.codepage = 1200;
 480         fr.chrg.cpMin = 0;
 481         fr.chrg.cpMax = SendMessageW(hEditorWnd, EM_GETTEXTLENGTHEX, (WPARAM)&gt, 0);
 482
 483         if(pd->Flags & PD_PAGENUMS)
 484             char_from_pagenum(hEditorWnd, &fr, pd->nToPage);
 485     }
 486
 487     StartDocW(fr.hdc, &di);
 488     do
 489     {
 490         int bottom = fr.rc.bottom;
 491         if(StartPage(fr.hdc) <= 0)
 492             break;
 493
 494         fr.chrg.cpMin = SendMessageW(hEditorWnd, EM_FORMATRANGE, TRUE, (LPARAM)&fr);
 495
 496         if(EndPage(fr.hdc) <= 0)
 497             break;
 498         bottom = fr.rc.bottom;
 499
 500         printedPages++;
 501         if((pd->Flags & PD_PAGENUMS) && (printedPages > (pd->nToPage - pd->nFromPage)))
 502             break;
 503     }
 504     while(fr.chrg.cpMin && fr.chrg.cpMin < fr.chrg.cpMax);
 505
 506     EndDoc(fr.hdc);
 507     SendMessageW(hEditorWnd, EM_FORMATRANGE, FALSE, 0);
 508 }
 509
 510 void dialog_printsetup(HWND hMainWnd)
 511 {
 512     PAGESETUPDLGW ps;
 513
 514     ZeroMemory(&ps, sizeof(ps));
 515     ps.lStructSize = sizeof(ps);
 516     ps.hwndOwner = hMainWnd;
 517     ps.Flags = PSD_INHUNDREDTHSOFMILLIMETERS | PSD_MARGINS;
 518     ps.rtMargin.left = twips_to_centmm(margins.left);
 519     ps.rtMargin.right = twips_to_centmm(margins.right);
 520     ps.rtMargin.top = twips_to_centmm(margins.top);
 521     ps.rtMargin.bottom = twips_to_centmm(margins.bottom);
 522     ps.hDevMode = devMode;
 523     ps.hDevNames = devNames;
 524
 525     if(PageSetupDlgW(&ps))
 526     {
 527         margins.left = centmm_to_twips(ps.rtMargin.left);
 528         margins.right = centmm_to_twips(ps.rtMargin.right);
 529         margins.top = centmm_to_twips(ps.rtMargin.top);
 530         margins.bottom = centmm_to_twips(ps.rtMargin.bottom);
 531         devMode = ps.hDevMode;
 532         devNames = ps.hDevNames;
 533         update_ruler(get_ruler_wnd(hMainWnd));
 534     }
 535 }
 536
 537 void get_default_printer_opts(void)
 538 {
 539     PRINTDLGW pd;
 540     ZeroMemory(&pd, sizeof(pd));
 541
 542     ZeroMemory(&pd, sizeof(pd));
 543     pd.lStructSize = sizeof(pd);
 544     pd.Flags = PD_RETURNDC | PD_RETURNDEFAULT;
 545     pd.hDevMode = devMode;
 546
 547     PrintDlgW(&pd);
 548
 549     devMode = pd.hDevMode;
 550     devNames = pd.hDevNames;
 551 }
 552
 553 void print_quick(HWND hMainWnd, LPWSTR wszFileName)
 554 {
 555     PRINTDLGW pd;
 556
 557     ZeroMemory(&pd, sizeof(pd));
 558     pd.hwndOwner = hMainWnd;
 559     pd.hDC = make_dc();
 560
 561     print(&pd, wszFileName);
 562     DeleteDC(pd.hDC);
 563 }
 564
 565 void dialog_print(HWND hMainWnd, LPWSTR wszFileName)
 566 {
 567     PRINTDLGW pd;
 568     HWND hEditorWnd = GetDlgItem(hMainWnd, IDC_EDITOR);
 569     int from = 0;
 570     int to = 0;
 571
 572     ZeroMemory(&pd, sizeof(pd));
 573     pd.lStructSize = sizeof(pd);
 574     pd.hwndOwner = hMainWnd;
 575     pd.Flags = PD_RETURNDC | PD_USEDEVMODECOPIESANDCOLLATE;
 576     pd.nMinPage = 1;
 577     pd.nMaxPage = -1;
 578     pd.hDevMode = devMode;
 579     pd.hDevNames = devNames;
 580
 581     SendMessageW(hEditorWnd, EM_GETSEL, (WPARAM)&from, (LPARAM)&to);
 582     if(from == to)
 583         pd.Flags |= PD_NOSELECTION;
 584
 585     if(PrintDlgW(&pd))
 586     {
 587         devMode = pd.hDevMode;
 588         devNames = pd.hDevNames;
 589         print(&pd, wszFileName);
 590         update_ruler(get_ruler_wnd(hMainWnd));
 591     }
 592 }
 593
 594 static void preview_bar_show(HWND hMainWnd, BOOL show)
 595 {
 596     HWND hReBar = GetDlgItem(hMainWnd, IDC_REBAR);
 597     int i;
 598
 599     if(show)
 600     {
 601         REBARBANDINFOW rb;
 602         HWND hStatic;
 603         UINT num_pages_string = preview.pages_shown > 1 ? STRING_PREVIEW_ONEPAGE :
 604                                                           STRING_PREVIEW_TWOPAGES;
 605
 606         AddTextButton(hReBar, STRING_PREVIEW_PRINT, ID_PRINT, BANDID_PREVIEW_BTN1);
 607         AddTextButton(hReBar, STRING_PREVIEW_NEXTPAGE, ID_PREVIEW_NEXTPAGE, BANDID_PREVIEW_BTN2);
 608         AddTextButton(hReBar, STRING_PREVIEW_PREVPAGE, ID_PREVIEW_PREVPAGE, BANDID_PREVIEW_BTN3);
 609         AddTextButton(hReBar, num_pages_string, ID_PREVIEW_NUMPAGES, BANDID_PREVIEW_BTN4);
 610         AddTextButton(hReBar, STRING_PREVIEW_ZOOMIN, ID_PREVIEW_ZOOMIN, BANDID_PREVIEW_BTN5);
 611         AddTextButton(hReBar, STRING_PREVIEW_ZOOMOUT, ID_PREVIEW_ZOOMOUT, BANDID_PREVIEW_BTN6);
 612         AddTextButton(hReBar, STRING_PREVIEW_CLOSE, ID_FILE_EXIT, BANDID_PREVIEW_BTN7);
 613
 614         hStatic = CreateWindowW(WC_STATICW, NULL,
 615                                 WS_VISIBLE | WS_CHILD, 0, 0, 0, 0,
 616                                 hReBar, NULL, NULL, NULL);
 617
 618         rb.cbSize = REBARBANDINFOW_V6_SIZE;
 619         rb.fMask = RBBIM_SIZE | RBBIM_CHILDSIZE | RBBIM_STYLE | RBBIM_CHILD | RBBIM_IDEALSIZE | RBBIM_ID;
 620         rb.fStyle = RBBS_NOGRIPPER | RBBS_VARIABLEHEIGHT;
 621         rb.hwndChild = hStatic;
 622         rb.cyChild = rb.cyMinChild = 22;
 623         rb.cx = rb.cxMinChild = 90;
 624         rb.cxIdeal = 100;
 625         rb.wID = BANDID_PREVIEW_BUFFER;
 626
 627         SendMessageW(hReBar, RB_INSERTBAND, -1, (LPARAM)&rb);
 628     } else
 629     {
 630         for(i = 0; i <= PREVIEW_BUTTONS; i++)
 631             SendMessageW(hReBar, RB_DELETEBAND, SendMessageW(hReBar, RB_IDTOINDEX, BANDID_PREVIEW_BTN1+i, 0), 0);
 632     }
 633 }
 634
 635 static const int min_spacing = 10;
 636
 637 static void update_preview_scrollbars(HWND hwndPreview, RECT *window)
 638 {
 639     SCROLLINFO sbi;
 640     sbi.cbSize = sizeof(sbi);
 641     sbi.fMask = SIF_PAGE|SIF_RANGE;
 642     sbi.nMin = 0;
 643     if (preview.zoomlevel == 0)
 644     {
 645         /* Hide scrollbars when zoomed out. */
 646         sbi.nMax = 0;
 647         sbi.nPage = window->right;
 648         SetScrollInfo(hwndPreview, SB_HORZ, &sbi, TRUE);
 649         sbi.nPage = window->bottom;
 650         SetScrollInfo(hwndPreview, SB_VERT, &sbi, TRUE);
 651     } else {
 652         sbi.nMax = preview.bmScaledSize.cx * preview.pages_shown +
 653                    min_spacing * (preview.pages_shown + 1);
 654         sbi.nPage = window->right;
 655         SetScrollInfo(hwndPreview, SB_HORZ, &sbi, TRUE);
 656         /* Change in the horizontal scrollbar visibility affects the
 657          * client rect, so update the client rect. */
 658         GetClientRect(hwndPreview, window);
 659         sbi.nMax = preview.bmScaledSize.cy + min_spacing * 2;
 660         sbi.nPage = window->bottom;
 661         SetScrollInfo(hwndPreview, SB_VERT, &sbi, TRUE);
 662     }
 663 }
 664
 665 static void update_preview_sizes(HWND hwndPreview, BOOL zoomLevelUpdated)
 666 {
 667     RECT window;
 668
 669     GetClientRect(hwndPreview, &window);
 670
 671     /* The zoom ratio isn't updated for partial zoom because of resizing the window. */
 672     if (zoomLevelUpdated || preview.zoomlevel != 1)
 673     {
 674         float ratio, ratioHeight, ratioWidth;
 675         if (preview.zoomlevel == 2)
 676         {
 677             ratio = 1.0;
 678         } else {
 679             ratioHeight = (window.bottom - min_spacing * 2) / (float)preview.bmSize.cy;
 680
 681             ratioWidth = (float)(window.right -
 682                                  min_spacing * (preview.pages_shown + 1)) /
 683                          (preview.pages_shown * preview.bmSize.cx);
 684
 685             if(ratioWidth > ratioHeight)
 686                 ratio = ratioHeight;
 687             else
 688                 ratio = ratioWidth;
 689
 690             if (preview.zoomlevel == 1)
 691                 ratio += (1.0 - ratio) / 2;
 692         }
 693         preview.zoomratio = ratio;
 694     }
 695
 696     preview.bmScaledSize.cx = preview.bmSize.cx * preview.zoomratio;
 697     preview.bmScaledSize.cy = preview.bmSize.cy * preview.zoomratio;
 698
 699     preview.spacing.cy = max(min_spacing, (window.bottom - preview.bmScaledSize.cy) / 2);
 700
 701     preview.spacing.cx = (window.right -
 702                           preview.bmScaledSize.cx * preview.pages_shown) /
 703                          (preview.pages_shown + 1);
 704     if (preview.spacing.cx < min_spacing)
 705         preview.spacing.cx = min_spacing;
 706
 707     update_preview_scrollbars(hwndPreview, &window);
 708 }
 709
 710 static void draw_preview_page(HDC hdc, HDC* hdcSized, FORMATRANGE* lpFr, float ratio, int bmNewWidth, int bmNewHeight, int bmWidth, int bmHeight, BOOL draw_margins)
 711 {
 712     HBITMAP hBitmapScaled = CreateCompatibleBitmap(hdc, bmNewWidth, bmNewHeight);
 713     HBITMAP oldbm;
 714     HPEN hPen, oldPen;
 715     int TopMargin = (int)((float)twips_to_pixels(lpFr->rc.top, GetDeviceCaps(hdc, LOGPIXELSX)) * ratio);
 716     int BottomMargin = (int)((float)twips_to_pixels(lpFr->rc.bottom, GetDeviceCaps(hdc, LOGPIXELSX)) * ratio);
 717     int LeftMargin = (int)((float)twips_to_pixels(lpFr->rc.left, GetDeviceCaps(hdc, LOGPIXELSY)) * ratio);
 718     int RightMargin = (int)((float)twips_to_pixels(lpFr->rc.right, GetDeviceCaps(hdc, LOGPIXELSY)) * ratio);
 719
 720     if(*hdcSized) {
 721         oldbm = SelectObject(*hdcSized, hBitmapScaled);
 722         DeleteObject(oldbm);
 723     } else {
 724         *hdcSized = CreateCompatibleDC(hdc);
 725         SelectObject(*hdcSized, hBitmapScaled);
 726     }
 727
 728     StretchBlt(*hdcSized, 0, 0, bmNewWidth, bmNewHeight, hdc, 0, 0, bmWidth, bmHeight, SRCCOPY);
 729
 730     if (!draw_margins) return;
 731
 732     /* Draw margin lines */
 733     hPen = CreatePen(PS_DOT, 1, RGB(0,0,0));
 734     oldPen = SelectObject(*hdcSized, hPen);
 735
 736     MoveToEx(*hdcSized, 0, TopMargin, NULL);
 737     LineTo(*hdcSized, bmNewWidth, TopMargin);
 738     MoveToEx(*hdcSized, 0, BottomMargin, NULL);
 739     LineTo(*hdcSized, bmNewWidth, BottomMargin);
 740
 741     MoveToEx(*hdcSized, LeftMargin, 0, NULL);
 742     LineTo(*hdcSized, LeftMargin, bmNewHeight);
 743     MoveToEx(*hdcSized, RightMargin, 0, NULL);
 744     LineTo(*hdcSized, RightMargin, bmNewHeight);
 745
 746     SelectObject(*hdcSized, oldPen);
 747     DeleteObject(hPen);
 748 }
 749
 750 static BOOL is_last_preview_page(int page)
 751 {
 752     return preview.pageEnds[page - 1] >= preview.textlength;
 753 }
 754
 755 /* Update for zoom ratio changes with same page. */
 756 static void update_scaled_preview(HWND hMainWnd)
 757 {
 758     FORMATRANGE fr;
 759     HWND hwndPreview;
 760
 761     /* This may occur on WM_CREATE before update_preview is called
 762      * because a WM_SIZE message is generated from updating the
 763      * scrollbars. */
 764     if (!preview.hdc) return;
 765
 766     hwndPreview = GetDlgItem(hMainWnd, IDC_PREVIEW);
 767     fr.hdcTarget = make_dc();
 768     fr.rc = fr.rcPage = preview.rcPage;
 769     fr.rc.left += margins.left;
 770     fr.rc.top += margins.top;
 771     fr.rc.bottom -= margins.bottom;
 772     fr.rc.right -= margins.right;
 773
 774     draw_preview_page(preview.hdc, &preview.hdcSized, &fr, preview.zoomratio,
 775                       preview.bmScaledSize.cx, preview.bmScaledSize.cy,
 776                       preview.bmSize.cx, preview.bmSize.cy, TRUE);
 777
 778     if(preview.pages_shown > 1)
 779     {
 780         draw_preview_page(preview.hdc2, &preview.hdcSized2, &fr, preview.zoomratio,
 781                           preview.bmScaledSize.cx, preview.bmScaledSize.cy,
 782                           preview.bmSize.cx, preview.bmSize.cy,
 783                           !is_last_preview_page(preview.page));
 784     }
 785
 786     InvalidateRect(hwndPreview, NULL, TRUE);
 787     DeleteDC(fr.hdcTarget);
 788 }
 789
 790 void init_preview(HWND hMainWnd, LPWSTR wszFileName)
 791 {
 792     HINSTANCE hInstance = GetModuleHandleW(0);
 793     preview.page = 1;
 794     preview.hdc = 0;
 795     preview.hdc2 = 0;
 796     preview.wszFileName = wszFileName;
 797     preview.zoomratio = 0;
 798     preview.zoomlevel = 0;
 799     preview_bar_show(hMainWnd, TRUE);
 800
 801     CreateWindowExW(0, wszPreviewWndClass, NULL,
 802             WS_VISIBLE | WS_CHILD | WS_VSCROLL | WS_HSCROLL,
 803             0, 0, 200, 10, hMainWnd, (HMENU)IDC_PREVIEW, hInstance, NULL);
 804 }
 805
 806 void close_preview(HWND hMainWnd)
 807 {
 808     HWND hwndPreview = GetDlgItem(hMainWnd, IDC_PREVIEW);
 809     preview.window.right = 0;
 810     preview.window.bottom = 0;
 811     preview.page = 0;
 812     HeapFree(GetProcessHeap(), 0, preview.pageEnds);
 813     preview.pageEnds = NULL;
 814     preview.pageCapacity = 0;
 815     if (preview.zoomlevel > 0)
 816         preview.pages_shown = preview.saved_pages_shown;
 817     if(preview.hdc) {
 818         HBITMAP oldbm = GetCurrentObject(preview.hdc, OBJ_BITMAP);
 819         DeleteDC(preview.hdc);
 820         DeleteObject(oldbm);
 821         preview.hdc = NULL;
 822     }
 823     if(preview.hdc2) {
 824         HBITMAP oldbm = GetCurrentObject(preview.hdc2, OBJ_BITMAP);
 825         DeleteDC(preview.hdc2);
 826         DeleteObject(oldbm);
 827         preview.hdc2 = NULL;
 828     }
 829     if(preview.hdcSized) {
 830         HBITMAP oldbm = GetCurrentObject(preview.hdcSized, OBJ_BITMAP);
 831         DeleteDC(preview.hdcSized);
 832         DeleteObject(oldbm);
 833         preview.hdcSized = NULL;
 834     }
 835     if(preview.hdcSized2) {
 836         HBITMAP oldbm = GetCurrentObject(preview.hdcSized2, OBJ_BITMAP);
 837         DeleteDC(preview.hdcSized2);
 838         DeleteObject(oldbm);
 839         preview.hdcSized2 = NULL;
 840     }
 841
 842     preview_bar_show(hMainWnd, FALSE);
 843     DestroyWindow(hwndPreview);
 844 }
 845
 846 BOOL preview_isactive(void)
 847 {
 848     return preview.page != 0;
 849 }
 850
 851 static void draw_preview(HWND hEditorWnd, FORMATRANGE* lpFr, RECT* paper, int page)
 852 {
 853     int bottom;
 854
 855     if (!preview.pageEnds)
 856     {
 857         preview.pageCapacity = 32;
 858         preview.pageEnds = HeapAlloc(GetProcessHeap(), 0,
 859                                     sizeof(int) * preview.pageCapacity);
 860         if (!preview.pageEnds) return;
 861     } else if (page >= preview.pageCapacity) {
 862         int *new_buffer;
 863         new_buffer = HeapReAlloc(GetProcessHeap(), 0, preview.pageEnds,
 864                                  sizeof(int) * preview.pageCapacity * 2);
 865         if (!new_buffer) return;
 866         preview.pageCapacity *= 2;
 867         preview.pageEnds = new_buffer;
 868     }
 869
 870     FillRect(lpFr->hdc, paper, GetStockObject(WHITE_BRUSH));
 871     if (page > 1 && is_last_preview_page(page - 1)) return;
 872     lpFr->chrg.cpMin = page <= 1 ? 0 : preview.pageEnds[page-2];
 873     bottom = lpFr->rc.bottom;
 874     preview.pageEnds[page-1] = SendMessageW(hEditorWnd, EM_FORMATRANGE, TRUE, (LPARAM)lpFr);
 875
 876     /* EM_FORMATRANGE sets fr.rc.bottom to indicate the area printed in,
 877      * but we want to keep the original for drawing margins */
 878     lpFr->rc.bottom = bottom;
 879     SendMessageW(hEditorWnd, EM_FORMATRANGE, FALSE, 0);
 880 }
 881
 882 static void update_preview_buttons(HWND hMainWnd)
 883 {
 884     HWND hReBar = GetDlgItem(hMainWnd, IDC_REBAR);
 885     EnableWindow(GetDlgItem(hReBar, ID_PREVIEW_PREVPAGE), preview.page > 1);
 886     EnableWindow(GetDlgItem(hReBar, ID_PREVIEW_NEXTPAGE),
 887                  !is_last_preview_page(preview.page) &&
 888                  !is_last_preview_page(preview.page + preview.pages_shown - 1));
 889     EnableWindow(GetDlgItem(hReBar, ID_PREVIEW_NUMPAGES),
 890                  preview.pages_shown > 1 ||
 891                  (!is_last_preview_page(1) && preview.zoomlevel == 0));
 892     EnableWindow(GetDlgItem(hReBar, ID_PREVIEW_ZOOMIN), preview.zoomlevel < 2);
 893     EnableWindow(GetDlgItem(hReBar, ID_PREVIEW_ZOOMOUT), preview.zoomlevel > 0);
 894 }
 895
 896 LRESULT print_preview(HWND hwndPreview)
 897 {
 898     HDC hdc;
 899     RECT window, background;
 900     PAINTSTRUCT ps;
 901     POINT scrollpos;
 902
 903     hdc = BeginPaint(hwndPreview, &ps);
 904     GetClientRect(hwndPreview, &window);
 905
 906     FillRect(hdc, &window, GetStockObject(GRAY_BRUSH));
 907
 908     scrollpos.x = GetScrollPos(hwndPreview, SB_HORZ);
 909     scrollpos.y = GetScrollPos(hwndPreview, SB_VERT);
 910
 911     background.left = preview.spacing.cx - 2 - scrollpos.x;
 912     background.right = background.left + preview.bmScaledSize.cx + 4;
 913     background.top = preview.spacing.cy - 2 - scrollpos.y;
 914     background.bottom = background.top + preview.bmScaledSize.cy + 4;
 915
 916     FillRect(hdc, &background, GetStockObject(BLACK_BRUSH));
 917
 918     if(preview.pages_shown > 1)
 919     {
 920         background.left += preview.bmScaledSize.cx + preview.spacing.cx;
 921         background.right += preview.bmScaledSize.cx + preview.spacing.cx;
 922
 923         FillRect(hdc, &background, GetStockObject(BLACK_BRUSH));
 924     }
 925
 926     BitBlt(hdc, preview.spacing.cx - scrollpos.x, preview.spacing.cy - scrollpos.y,
 927            preview.bmScaledSize.cx, preview.bmScaledSize.cy,
 928            preview.hdcSized, 0, 0, SRCCOPY);
 929
 930     if(preview.pages_shown > 1)
 931     {
 932         BitBlt(hdc, preview.spacing.cx * 2 + preview.bmScaledSize.cx - scrollpos.x,
 933                preview.spacing.cy - scrollpos.y, preview.bmScaledSize.cx,
 934                preview.bmScaledSize.cy, preview.hdcSized2, 0, 0, SRCCOPY);
 935     }
 936
 937     preview.window = window;
 938
 939     EndPaint(hwndPreview, &ps);
 940
 941     return 0;
 942 }
 943
 944 static void update_preview_statusbar(HWND hMainWnd)
 945 {
 946     HWND hStatusbar = GetDlgItem(hMainWnd, IDC_STATUSBAR);
 947     HINSTANCE hInst = GetModuleHandleW(0);
 948     WCHAR *p;
 949     WCHAR wstr[MAX_STRING_LEN];
 950
 951     p = wstr;
 952     if (preview.pages_shown < 2 || is_last_preview_page(preview.page))
 953     {
 954         static const WCHAR fmt[] = {' ','%','d','\0'};
 955         p += LoadStringW(hInst, STRING_PREVIEW_PAGE, wstr, MAX_STRING_LEN);
 956         wsprintfW(p, fmt, preview.page);
 957     } else {
 958         static const WCHAR fmt[] = {' ','%','d','-','%','d','\0'};
 959         p += LoadStringW(hInst, STRING_PREVIEW_PAGES, wstr, MAX_STRING_LEN);
 960         wsprintfW(p, fmt, preview.page, preview.page + 1);
 961     }
 962     SetWindowTextW(hStatusbar, wstr);
 963 }
 964
 965 /* Update for page changes. */
 966 static void update_preview(HWND hMainWnd)
 967 {
 968     RECT paper;
 969     HWND hEditorWnd = GetDlgItem(hMainWnd, IDC_EDITOR);
 970     HWND hwndPreview = GetDlgItem(hMainWnd, IDC_PREVIEW);
 971     HBITMAP hBitmapCapture;
 972     FORMATRANGE fr;
 973     HDC hdc = GetDC(hwndPreview);
 974
 975     fr.hdcTarget = make_dc();
 976     fr.rc = fr.rcPage = preview.rcPage;
 977     fr.rc.left += margins.left;
 978     fr.rc.top += margins.top;
 979     fr.rc.bottom -= margins.bottom;
 980     fr.rc.right -= margins.right;
 981
 982     fr.chrg.cpMin = 0;
 983     fr.chrg.cpMax = preview.textlength;
 984
 985     paper.left = 0;
 986     paper.right = preview.bmSize.cx;
 987     paper.top = 0;
 988     paper.bottom = preview.bmSize.cy;
 989
 990     if (!preview.hdc) {
 991         preview.hdc = CreateCompatibleDC(hdc);
 992         hBitmapCapture = CreateCompatibleBitmap(hdc, preview.bmSize.cx, preview.bmSize.cy);
 993         SelectObject(preview.hdc, hBitmapCapture);
 994     }
 995
 996     fr.hdc = preview.hdc;
 997     draw_preview(hEditorWnd, &fr, &paper, preview.page);
 998
 999     if(preview.pages_shown > 1)
1000     {
1001         if (!preview.hdc2)
1002         {
1003             preview.hdc2 = CreateCompatibleDC(hdc);
1004             hBitmapCapture = CreateCompatibleBitmap(hdc,
1005                                                     preview.bmSize.cx,
1006                                                     preview.bmSize.cy);
1007             SelectObject(preview.hdc2, hBitmapCapture);
1008         }
1009
1010         fr.hdc = preview.hdc2;
1011         draw_preview(hEditorWnd, &fr, &fr.rcPage, preview.page + 1);
1012     }
1013     DeleteDC(fr.hdcTarget);
1014     ReleaseDC(hwndPreview, hdc);
1015
1016     update_scaled_preview(hMainWnd);
1017     update_preview_buttons(hMainWnd);
1018     update_preview_statusbar(hMainWnd);
1019 }
1020
1021 static void toggle_num_pages(HWND hMainWnd)
1022 {
1023     HWND hReBar = GetDlgItem(hMainWnd, IDC_REBAR);
1024     WCHAR name[MAX_STRING_LEN];
1025     HINSTANCE hInst = GetModuleHandleW(0);
1026     int nPreviewPages;
1027
1028     preview.pages_shown = preview.pages_shown > 1 ? 1 : 2;
1029
1030     nPreviewPages = preview.zoomlevel > 0 ? preview.saved_pages_shown :
1031                                             preview.pages_shown;
1032
1033     LoadStringW(hInst, nPreviewPages > 1 ? STRING_PREVIEW_ONEPAGE :
1034                                            STRING_PREVIEW_TWOPAGES,
1035                 name, MAX_STRING_LEN);
1036
1037     SetWindowTextW(GetDlgItem(hReBar, ID_PREVIEW_NUMPAGES), name);
1038     update_preview_sizes(GetDlgItem(hMainWnd, IDC_PREVIEW), TRUE);
1039     update_preview(hMainWnd);
1040 }
1041
1042 /* Returns the page shown that the point is in (1 or 2) or 0 if the point
1043  * isn't inside either page */
1044 int preview_page_hittest(POINT pt)
1045 {
1046     RECT rc;
1047     rc.left = preview.spacing.cx;
1048     rc.right = rc.left + preview.bmScaledSize.cx;
1049     rc.top = preview.spacing.cy;
1050     rc.bottom = rc.top + preview.bmScaledSize.cy;
1051     if (PtInRect(&rc, pt))
1052         return 1;
1053
1054     if (preview.pages_shown <= 1)
1055         return 0;
1056
1057     rc.left += preview.bmScaledSize.cx + preview.spacing.cx;
1058     rc.right += preview.bmScaledSize.cx + preview.spacing.cx;
1059     if (PtInRect(&rc, pt))
1060         return is_last_preview_page(preview.page) ? 1 : 2;
1061
1062     return 0;
1063 }
1064
1065 LRESULT CALLBACK preview_proc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
1066 {
1067     switch(msg)
1068     {
1069         case WM_CREATE:
1070         {
1071             HWND hMainWnd = GetParent(hWnd);
1072             HWND hEditorWnd = GetDlgItem(hMainWnd, IDC_EDITOR);
1073             FORMATRANGE fr;
1074             GETTEXTLENGTHEX gt = {GTL_DEFAULT, 1200};
1075             HDC hdc = GetDC(hWnd);
1076             HDC hdcTarget = make_dc();
1077
1078             fr.rc = preview.rcPage = get_print_rect(hdcTarget);
1079             preview.rcPage.bottom += margins.bottom;
1080             preview.rcPage.right += margins.right;
1081             preview.rcPage.top = preview.rcPage.left = 0;
1082             fr.rcPage = preview.rcPage;
1083
1084             preview.bmSize.cx = twips_to_pixels(preview.rcPage.right, GetDeviceCaps(hdc, LOGPIXELSX));
1085             preview.bmSize.cy = twips_to_pixels(preview.rcPage.bottom, GetDeviceCaps(hdc, LOGPIXELSY));
1086
1087             preview.textlength = SendMessageW(hEditorWnd, EM_GETTEXTLENGTHEX, (WPARAM)&gt, 0);
1088
1089             fr.hdc = CreateCompatibleDC(hdc);
1090             fr.hdcTarget = hdcTarget;
1091             fr.chrg.cpMin = 0;
1092             fr.chrg.cpMax = preview.textlength;
1093             DeleteDC(fr.hdc);
1094             DeleteDC(hdcTarget);
1095             ReleaseDC(hWnd, hdc);
1096
1097             update_preview_sizes(hWnd, TRUE);
1098             update_preview(hMainWnd);
1099             break;
1100         }
1101
1102         case WM_PAINT:
1103             return print_preview(hWnd);
1104
1105         case WM_SIZE:
1106         {
1107             update_preview_sizes(hWnd, FALSE);
1108             update_scaled_preview(hWnd);
1109             break;
1110         }
1111
1112         case WM_VSCROLL:
1113         case WM_HSCROLL:
1114         {
1115             SCROLLINFO si;
1116             RECT rc;
1117             int nBar = (msg == WM_VSCROLL) ? SB_VERT : SB_HORZ;
1118             int origPos;
1119
1120             GetClientRect(hWnd, &rc);
1121             si.cbSize = sizeof(si);
1122             si.fMask = SIF_ALL;
1123             GetScrollInfo(hWnd, nBar, &si);
1124             origPos = si.nPos;
1125             switch(LOWORD(wParam))
1126             {
1127                 case SB_TOP: /* == SB_LEFT */
1128                     si.nPos = si.nMin;
1129                     break;
1130                 case SB_BOTTOM: /* == SB_RIGHT */
1131                     si.nPos = si.nMax;
1132                     break;
1133                 case SB_LINEUP: /* == SB_LINELEFT */
1134                     si.nPos -= si.nPage / 10;
1135                     break;
1136                 case SB_LINEDOWN: /* == SB_LINERIGHT */
1137                     si.nPos += si.nPage / 10;
1138                     break;
1139                 case SB_PAGEUP: /* == SB_PAGELEFT */
1140                     si.nPos -= si.nPage;
1141                     break;
1142                 case SB_PAGEDOWN: /* SB_PAGERIGHT */
1143                     si.nPos += si.nPage;
1144                     break;
1145                 case SB_THUMBTRACK:
1146                     si.nPos = si.nTrackPos;
1147                     break;
1148             }
1149             si.fMask = SIF_POS;
1150             SetScrollInfo(hWnd, nBar, &si, TRUE);
1151             GetScrollInfo(hWnd, nBar, &si);
1152             if (si.nPos != origPos)
1153             {
1154                 int amount = origPos - si.nPos;
1155                 if (msg == WM_VSCROLL)
1156                     ScrollWindow(hWnd, 0, amount, NULL, NULL);
1157                 else
1158                     ScrollWindow(hWnd, amount, 0, NULL, NULL);
1159             }
1160             return 0;
1161         }
1162
1163         case WM_SETCURSOR:
1164         {
1165             POINT pt;
1166             RECT rc;
1167             int bHittest = FALSE;
1168             DWORD messagePos = GetMessagePos();
1169             pt.x = (short)LOWORD(messagePos);
1170             pt.y = (short)HIWORD(messagePos);
1171             ScreenToClient(hWnd, &pt);
1172
1173             GetClientRect(hWnd, &rc);
1174             if (PtInRect(&rc, pt))
1175             {
1176                 pt.x += GetScrollPos(hWnd, SB_HORZ);
1177                 pt.y += GetScrollPos(hWnd, SB_VERT);
1178                 bHittest = preview_page_hittest(pt);
1179             }
1180
1181             if (bHittest)
1182                 SetCursor(LoadCursorW(GetModuleHandleW(0),
1183                                       MAKEINTRESOURCEW(IDC_ZOOM)));
1184             else
1185                 SetCursor(LoadCursorW(NULL, (WCHAR*)IDC_ARROW));
1186
1187             return TRUE;
1188         }
1189
1190         case WM_LBUTTONDOWN:
1191         {
1192             int page;
1193             POINT pt;
1194             pt.x = (short)LOWORD(lParam) + GetScrollPos(hWnd, SB_HORZ);
1195             pt.y = (short)HIWORD(lParam) + GetScrollPos(hWnd, SB_VERT);
1196             if ((page = preview_page_hittest(pt)) > 0)
1197             {
1198                 HWND hMainWnd = GetParent(hWnd);
1199
1200                 /* Convert point from client coordinate to unzoomed page
1201                  * coordinate. */
1202                 pt.x -= preview.spacing.cx;
1203                 if (page > 1)
1204                     pt.x -= preview.bmScaledSize.cx + preview.spacing.cx;
1205                 pt.y -= preview.spacing.cy;
1206                 pt.x /= preview.zoomratio;
1207                 pt.y /= preview.zoomratio;
1208
1209                 if (preview.zoomlevel == 0)
1210                     preview.saved_pages_shown = preview.pages_shown;
1211                 preview.zoomlevel = (preview.zoomlevel + 1) % 3;
1212                 preview.zoomratio = 0;
1213                 if (preview.zoomlevel == 0 && preview.saved_pages_shown > 1)
1214                 {
1215                     toggle_num_pages(hMainWnd);
1216                 } else if (preview.pages_shown > 1) {
1217                     if (page >= 2) preview.page++;
1218                     toggle_num_pages(hMainWnd);
1219                 } else {
1220                     update_preview_sizes(hWnd, TRUE);
1221                     update_scaled_preview(hMainWnd);
1222                     update_preview_buttons(hMainWnd);
1223                 }
1224
1225                 if (preview.zoomlevel > 0) {
1226                     SCROLLINFO si;
1227                     /* Convert the coordinate back to client coordinate. */
1228                     pt.x *= preview.zoomratio;
1229                     pt.y *= preview.zoomratio;
1230                     pt.x += preview.spacing.cx;
1231                     pt.y += preview.spacing.cy;
1232                     /* Scroll to center view at that point on the page */
1233                     si.cbSize = sizeof(si);
1234                     si.fMask = SIF_PAGE;
1235                     GetScrollInfo(hWnd, SB_HORZ, &si);
1236                     pt.x -= si.nPage / 2;
1237                     SetScrollPos(hWnd, SB_HORZ, pt.x, TRUE);
1238                     GetScrollInfo(hWnd, SB_VERT, &si);
1239                     pt.y -= si.nPage / 2;
1240                     SetScrollPos(hWnd, SB_VERT, pt.y, TRUE);
1241                 }
1242             }
1243         }
1244
1245         default:
1246             return DefWindowProcW(hWnd, msg, wParam, lParam);
1247     }
1248
1249     return 0;
1250 }
1251
1252 LRESULT preview_command(HWND hWnd, WPARAM wParam)
1253 {
1254     switch(LOWORD(wParam))
1255     {
1256         case ID_FILE_EXIT:
1257             PostMessageW(hWnd, WM_CLOSE, 0, 0);
1258             break;
1259
1260         case ID_PREVIEW_NEXTPAGE:
1261         case ID_PREVIEW_PREVPAGE:
1262         {
1263             if(LOWORD(wParam) == ID_PREVIEW_NEXTPAGE)
1264                 preview.page++;
1265             else
1266                 preview.page--;
1267
1268             update_preview(hWnd);
1269         }
1270         break;
1271
1272         case ID_PREVIEW_NUMPAGES:
1273             toggle_num_pages(hWnd);
1274             break;
1275
1276         case ID_PREVIEW_ZOOMIN:
1277             if (preview.zoomlevel < 2)
1278             {
1279                 if (preview.zoomlevel == 0)
1280                     preview.saved_pages_shown = preview.pages_shown;
1281                 preview.zoomlevel++;
1282                 preview.zoomratio = 0;
1283                 if (preview.pages_shown > 1)
1284                 {
1285                     /* Forced switch to one page when zooming in. */
1286                     toggle_num_pages(hWnd);
1287                 } else {
1288                     HWND hwndPreview = GetDlgItem(hWnd, IDC_PREVIEW);
1289                     update_preview_sizes(hwndPreview, TRUE);
1290                     update_scaled_preview(hWnd);
1291                     update_preview_buttons(hWnd);
1292                 }
1293             }
1294             break;
1295
1296         case ID_PREVIEW_ZOOMOUT:
1297             if (preview.zoomlevel > 0)
1298             {
1299                 HWND hwndPreview = GetDlgItem(hWnd, IDC_PREVIEW);
1300                 preview.zoomlevel--;
1301                 preview.zoomratio = 0;
1302                 if (preview.zoomlevel == 0 && preview.saved_pages_shown > 1) {
1303                     toggle_num_pages(hWnd);
1304                 } else {
1305                     update_preview_sizes(hwndPreview, TRUE);
1306                     update_scaled_preview(hWnd);
1307                     update_preview_buttons(hWnd);
1308                 }
1309             }
1310             break;
1311
1312         case ID_PRINT:
1313             dialog_print(hWnd, preview.wszFileName);
1314             SendMessageW(hWnd, WM_CLOSE, 0, 0);
1315             break;
1316     }
1317
1318     return 0;
1319 }