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