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         if(StartPage(fr.hdc) <= 0)
 491             break;
 492
 493         fr.chrg.cpMin = SendMessageW(hEditorWnd, EM_FORMATRANGE, TRUE, (LPARAM)&fr);
 494
 495         if(EndPage(fr.hdc) <= 0)
 496             break;
 497
 498         printedPages++;
 499         if((pd->Flags & PD_PAGENUMS) && (printedPages > (pd->nToPage - pd->nFromPage)))
 500             break;
 501     }
 502     while(fr.chrg.cpMin && fr.chrg.cpMin < fr.chrg.cpMax);
 503
 504     EndDoc(fr.hdc);
 505     SendMessageW(hEditorWnd, EM_FORMATRANGE, FALSE, 0);
 506 }
 507
 508 void dialog_printsetup(HWND hMainWnd)
 509 {
 510     PAGESETUPDLGW ps;
 511
 512     ZeroMemory(&ps, sizeof(ps));
 513     ps.lStructSize = sizeof(ps);
 514     ps.hwndOwner = hMainWnd;
 515     ps.Flags = PSD_INHUNDREDTHSOFMILLIMETERS | PSD_MARGINS;
 516     ps.rtMargin.left = twips_to_centmm(margins.left);
 517     ps.rtMargin.right = twips_to_centmm(margins.right);
 518     ps.rtMargin.top = twips_to_centmm(margins.top);
 519     ps.rtMargin.bottom = twips_to_centmm(margins.bottom);
 520     ps.hDevMode = devMode;
 521     ps.hDevNames = devNames;
 522
 523     if(PageSetupDlgW(&ps))
 524     {
 525         margins.left = centmm_to_twips(ps.rtMargin.left);
 526         margins.right = centmm_to_twips(ps.rtMargin.right);
 527         margins.top = centmm_to_twips(ps.rtMargin.top);
 528         margins.bottom = centmm_to_twips(ps.rtMargin.bottom);
 529         devMode = ps.hDevMode;
 530         devNames = ps.hDevNames;
 531         update_ruler(get_ruler_wnd(hMainWnd));
 532     }
 533 }
 534
 535 void get_default_printer_opts(void)
 536 {
 537     PRINTDLGW pd;
 538     ZeroMemory(&pd, sizeof(pd));
 539
 540     ZeroMemory(&pd, sizeof(pd));
 541     pd.lStructSize = sizeof(pd);
 542     pd.Flags = PD_RETURNDC | PD_RETURNDEFAULT;
 543     pd.hDevMode = devMode;
 544
 545     PrintDlgW(&pd);
 546
 547     devMode = pd.hDevMode;
 548     devNames = pd.hDevNames;
 549 }
 550
 551 void print_quick(HWND hMainWnd, LPWSTR wszFileName)
 552 {
 553     PRINTDLGW pd;
 554
 555     ZeroMemory(&pd, sizeof(pd));
 556     pd.hwndOwner = hMainWnd;
 557     pd.hDC = make_dc();
 558
 559     print(&pd, wszFileName);
 560     DeleteDC(pd.hDC);
 561 }
 562
 563 void dialog_print(HWND hMainWnd, LPWSTR wszFileName)
 564 {
 565     PRINTDLGW pd;
 566     HWND hEditorWnd = GetDlgItem(hMainWnd, IDC_EDITOR);
 567     int from = 0;
 568     int to = 0;
 569
 570     ZeroMemory(&pd, sizeof(pd));
 571     pd.lStructSize = sizeof(pd);
 572     pd.hwndOwner = hMainWnd;
 573     pd.Flags = PD_RETURNDC | PD_USEDEVMODECOPIESANDCOLLATE;
 574     pd.nMinPage = 1;
 575     pd.nMaxPage = -1;
 576     pd.hDevMode = devMode;
 577     pd.hDevNames = devNames;
 578
 579     SendMessageW(hEditorWnd, EM_GETSEL, (WPARAM)&from, (LPARAM)&to);
 580     if(from == to)
 581         pd.Flags |= PD_NOSELECTION;
 582
 583     if(PrintDlgW(&pd))
 584     {
 585         devMode = pd.hDevMode;
 586         devNames = pd.hDevNames;
 587         print(&pd, wszFileName);
 588         update_ruler(get_ruler_wnd(hMainWnd));
 589     }
 590 }
 591
 592 static void preview_bar_show(HWND hMainWnd, BOOL show)
 593 {
 594     HWND hReBar = GetDlgItem(hMainWnd, IDC_REBAR);
 595     int i;
 596
 597     if(show)
 598     {
 599         REBARBANDINFOW rb;
 600         HWND hStatic;
 601         UINT num_pages_string = preview.pages_shown > 1 ? STRING_PREVIEW_ONEPAGE :
 602                                                           STRING_PREVIEW_TWOPAGES;
 603
 604         AddTextButton(hReBar, STRING_PREVIEW_PRINT, ID_PRINT, BANDID_PREVIEW_BTN1);
 605         AddTextButton(hReBar, STRING_PREVIEW_NEXTPAGE, ID_PREVIEW_NEXTPAGE, BANDID_PREVIEW_BTN2);
 606         AddTextButton(hReBar, STRING_PREVIEW_PREVPAGE, ID_PREVIEW_PREVPAGE, BANDID_PREVIEW_BTN3);
 607         AddTextButton(hReBar, num_pages_string, ID_PREVIEW_NUMPAGES, BANDID_PREVIEW_BTN4);
 608         AddTextButton(hReBar, STRING_PREVIEW_ZOOMIN, ID_PREVIEW_ZOOMIN, BANDID_PREVIEW_BTN5);
 609         AddTextButton(hReBar, STRING_PREVIEW_ZOOMOUT, ID_PREVIEW_ZOOMOUT, BANDID_PREVIEW_BTN6);
 610         AddTextButton(hReBar, STRING_PREVIEW_CLOSE, ID_FILE_EXIT, BANDID_PREVIEW_BTN7);
 611
 612         hStatic = CreateWindowW(WC_STATICW, NULL,
 613                                 WS_VISIBLE | WS_CHILD, 0, 0, 0, 0,
 614                                 hReBar, NULL, NULL, NULL);
 615
 616         rb.cbSize = REBARBANDINFOW_V6_SIZE;
 617         rb.fMask = RBBIM_SIZE | RBBIM_CHILDSIZE | RBBIM_STYLE | RBBIM_CHILD | RBBIM_IDEALSIZE | RBBIM_ID;
 618         rb.fStyle = RBBS_NOGRIPPER | RBBS_VARIABLEHEIGHT;
 619         rb.hwndChild = hStatic;
 620         rb.cyChild = rb.cyMinChild = 22;
 621         rb.cx = rb.cxMinChild = 90;
 622         rb.cxIdeal = 100;
 623         rb.wID = BANDID_PREVIEW_BUFFER;
 624
 625         SendMessageW(hReBar, RB_INSERTBAND, -1, (LPARAM)&rb);
 626     } else
 627     {
 628         for(i = 0; i <= PREVIEW_BUTTONS; i++)
 629             SendMessageW(hReBar, RB_DELETEBAND, SendMessageW(hReBar, RB_IDTOINDEX, BANDID_PREVIEW_BTN1+i, 0), 0);
 630     }
 631 }
 632
 633 static const int min_spacing = 10;
 634
 635 static void update_preview_scrollbars(HWND hwndPreview, RECT *window)
 636 {
 637     SCROLLINFO sbi;
 638     sbi.cbSize = sizeof(sbi);
 639     sbi.fMask = SIF_PAGE|SIF_RANGE;
 640     sbi.nMin = 0;
 641     if (preview.zoomlevel == 0)
 642     {
 643         /* Hide scrollbars when zoomed out. */
 644         sbi.nMax = 0;
 645         sbi.nPage = window->right;
 646         SetScrollInfo(hwndPreview, SB_HORZ, &sbi, TRUE);
 647         sbi.nPage = window->bottom;
 648         SetScrollInfo(hwndPreview, SB_VERT, &sbi, TRUE);
 649     } else {
 650         sbi.nMax = preview.bmScaledSize.cx * preview.pages_shown +
 651                    min_spacing * (preview.pages_shown + 1);
 652         sbi.nPage = window->right;
 653         SetScrollInfo(hwndPreview, SB_HORZ, &sbi, TRUE);
 654         /* Change in the horizontal scrollbar visibility affects the
 655          * client rect, so update the client rect. */
 656         GetClientRect(hwndPreview, window);
 657         sbi.nMax = preview.bmScaledSize.cy + min_spacing * 2;
 658         sbi.nPage = window->bottom;
 659         SetScrollInfo(hwndPreview, SB_VERT, &sbi, TRUE);
 660     }
 661 }
 662
 663 static void update_preview_sizes(HWND hwndPreview, BOOL zoomLevelUpdated)
 664 {
 665     RECT window;
 666
 667     GetClientRect(hwndPreview, &window);
 668
 669     /* The zoom ratio isn't updated for partial zoom because of resizing the window. */
 670     if (zoomLevelUpdated || preview.zoomlevel != 1)
 671     {
 672         float ratio, ratioHeight, ratioWidth;
 673         if (preview.zoomlevel == 2)
 674         {
 675             ratio = 1.0;
 676         } else {
 677             ratioHeight = (window.bottom - min_spacing * 2) / (float)preview.bmSize.cy;
 678
 679             ratioWidth = (float)(window.right -
 680                                  min_spacing * (preview.pages_shown + 1)) /
 681                          (preview.pages_shown * preview.bmSize.cx);
 682
 683             if(ratioWidth > ratioHeight)
 684                 ratio = ratioHeight;
 685             else
 686                 ratio = ratioWidth;
 687
 688             if (preview.zoomlevel == 1)
 689                 ratio += (1.0 - ratio) / 2;
 690         }
 691         preview.zoomratio = ratio;
 692     }
 693
 694     preview.bmScaledSize.cx = preview.bmSize.cx * preview.zoomratio;
 695     preview.bmScaledSize.cy = preview.bmSize.cy * preview.zoomratio;
 696
 697     preview.spacing.cy = max(min_spacing, (window.bottom - preview.bmScaledSize.cy) / 2);
 698
 699     preview.spacing.cx = (window.right -
 700                           preview.bmScaledSize.cx * preview.pages_shown) /
 701                          (preview.pages_shown + 1);
 702     if (preview.spacing.cx < min_spacing)
 703         preview.spacing.cx = min_spacing;
 704
 705     update_preview_scrollbars(hwndPreview, &window);
 706 }
 707
 708 static void draw_preview_page(HDC hdc, HDC* hdcSized, FORMATRANGE* lpFr, float ratio, int bmNewWidth, int bmNewHeight, int bmWidth, int bmHeight, BOOL draw_margins)
 709 {
 710     HBITMAP hBitmapScaled = CreateCompatibleBitmap(hdc, bmNewWidth, bmNewHeight);
 711     HBITMAP oldbm;
 712     HPEN hPen, oldPen;
 713     int TopMargin = (int)((float)twips_to_pixels(lpFr->rc.top, GetDeviceCaps(hdc, LOGPIXELSX)) * ratio);
 714     int BottomMargin = (int)((float)twips_to_pixels(lpFr->rc.bottom, GetDeviceCaps(hdc, LOGPIXELSX)) * ratio);
 715     int LeftMargin = (int)((float)twips_to_pixels(lpFr->rc.left, GetDeviceCaps(hdc, LOGPIXELSY)) * ratio);
 716     int RightMargin = (int)((float)twips_to_pixels(lpFr->rc.right, GetDeviceCaps(hdc, LOGPIXELSY)) * ratio);
 717
 718     if(*hdcSized) {
 719         oldbm = SelectObject(*hdcSized, hBitmapScaled);
 720         DeleteObject(oldbm);
 721     } else {
 722         *hdcSized = CreateCompatibleDC(hdc);
 723         SelectObject(*hdcSized, hBitmapScaled);
 724     }
 725
 726     StretchBlt(*hdcSized, 0, 0, bmNewWidth, bmNewHeight, hdc, 0, 0, bmWidth, bmHeight, SRCCOPY);
 727
 728     if (!draw_margins) return;
 729
 730     /* Draw margin lines */
 731     hPen = CreatePen(PS_DOT, 1, RGB(0,0,0));
 732     oldPen = SelectObject(*hdcSized, hPen);
 733
 734     MoveToEx(*hdcSized, 0, TopMargin, NULL);
 735     LineTo(*hdcSized, bmNewWidth, TopMargin);
 736     MoveToEx(*hdcSized, 0, BottomMargin, NULL);
 737     LineTo(*hdcSized, bmNewWidth, BottomMargin);
 738
 739     MoveToEx(*hdcSized, LeftMargin, 0, NULL);
 740     LineTo(*hdcSized, LeftMargin, bmNewHeight);
 741     MoveToEx(*hdcSized, RightMargin, 0, NULL);
 742     LineTo(*hdcSized, RightMargin, bmNewHeight);
 743
 744     SelectObject(*hdcSized, oldPen);
 745     DeleteObject(hPen);
 746 }
 747
 748 static BOOL is_last_preview_page(int page)
 749 {
 750     return preview.pageEnds[page - 1] >= preview.textlength;
 751 }
 752
 753 /* Update for zoom ratio changes with same page. */
 754 static void update_scaled_preview(HWND hMainWnd)
 755 {
 756     FORMATRANGE fr;
 757     HWND hwndPreview;
 758
 759     /* This may occur on WM_CREATE before update_preview is called
 760      * because a WM_SIZE message is generated from updating the
 761      * scrollbars. */
 762     if (!preview.hdc) return;
 763
 764     hwndPreview = GetDlgItem(hMainWnd, IDC_PREVIEW);
 765     fr.hdcTarget = make_dc();
 766     fr.rc = fr.rcPage = preview.rcPage;
 767     fr.rc.left += margins.left;
 768     fr.rc.top += margins.top;
 769     fr.rc.bottom -= margins.bottom;
 770     fr.rc.right -= margins.right;
 771
 772     draw_preview_page(preview.hdc, &preview.hdcSized, &fr, preview.zoomratio,
 773                       preview.bmScaledSize.cx, preview.bmScaledSize.cy,
 774                       preview.bmSize.cx, preview.bmSize.cy, TRUE);
 775
 776     if(preview.pages_shown > 1)
 777     {
 778         draw_preview_page(preview.hdc2, &preview.hdcSized2, &fr, preview.zoomratio,
 779                           preview.bmScaledSize.cx, preview.bmScaledSize.cy,
 780                           preview.bmSize.cx, preview.bmSize.cy,
 781                           !is_last_preview_page(preview.page));
 782     }
 783
 784     InvalidateRect(hwndPreview, NULL, TRUE);
 785     DeleteDC(fr.hdcTarget);
 786 }
 787
 788 void init_preview(HWND hMainWnd, LPWSTR wszFileName)
 789 {
 790     HINSTANCE hInstance = GetModuleHandleW(0);
 791     preview.page = 1;
 792     preview.hdc = 0;
 793     preview.hdc2 = 0;
 794     preview.wszFileName = wszFileName;
 795     preview.zoomratio = 0;
 796     preview.zoomlevel = 0;
 797     preview_bar_show(hMainWnd, TRUE);
 798
 799     CreateWindowExW(0, wszPreviewWndClass, NULL,
 800             WS_VISIBLE | WS_CHILD | WS_VSCROLL | WS_HSCROLL,
 801             0, 0, 200, 10, hMainWnd, (HMENU)IDC_PREVIEW, hInstance, NULL);
 802 }
 803
 804 void close_preview(HWND hMainWnd)
 805 {
 806     HWND hwndPreview = GetDlgItem(hMainWnd, IDC_PREVIEW);
 807     preview.window.right = 0;
 808     preview.window.bottom = 0;
 809     preview.page = 0;
 810     HeapFree(GetProcessHeap(), 0, preview.pageEnds);
 811     preview.pageEnds = NULL;
 812     preview.pageCapacity = 0;
 813     if (preview.zoomlevel > 0)
 814         preview.pages_shown = preview.saved_pages_shown;
 815     if(preview.hdc) {
 816         HBITMAP oldbm = GetCurrentObject(preview.hdc, OBJ_BITMAP);
 817         DeleteDC(preview.hdc);
 818         DeleteObject(oldbm);
 819         preview.hdc = NULL;
 820     }
 821     if(preview.hdc2) {
 822         HBITMAP oldbm = GetCurrentObject(preview.hdc2, OBJ_BITMAP);
 823         DeleteDC(preview.hdc2);
 824         DeleteObject(oldbm);
 825         preview.hdc2 = NULL;
 826     }
 827     if(preview.hdcSized) {
 828         HBITMAP oldbm = GetCurrentObject(preview.hdcSized, OBJ_BITMAP);
 829         DeleteDC(preview.hdcSized);
 830         DeleteObject(oldbm);
 831         preview.hdcSized = NULL;
 832     }
 833     if(preview.hdcSized2) {
 834         HBITMAP oldbm = GetCurrentObject(preview.hdcSized2, OBJ_BITMAP);
 835         DeleteDC(preview.hdcSized2);
 836         DeleteObject(oldbm);
 837         preview.hdcSized2 = NULL;
 838     }
 839
 840     preview_bar_show(hMainWnd, FALSE);
 841     DestroyWindow(hwndPreview);
 842 }
 843
 844 BOOL preview_isactive(void)
 845 {
 846     return preview.page != 0;
 847 }
 848
 849 static void draw_preview(HWND hEditorWnd, FORMATRANGE* lpFr, RECT* paper, int page)
 850 {
 851     int bottom;
 852
 853     if (!preview.pageEnds)
 854     {
 855         preview.pageCapacity = 32;
 856         preview.pageEnds = HeapAlloc(GetProcessHeap(), 0,
 857                                     sizeof(int) * preview.pageCapacity);
 858         if (!preview.pageEnds) return;
 859     } else if (page >= preview.pageCapacity) {
 860         int *new_buffer;
 861         new_buffer = HeapReAlloc(GetProcessHeap(), 0, preview.pageEnds,
 862                                  sizeof(int) * preview.pageCapacity * 2);
 863         if (!new_buffer) return;
 864         preview.pageCapacity *= 2;
 865         preview.pageEnds = new_buffer;
 866     }
 867
 868     FillRect(lpFr->hdc, paper, GetStockObject(WHITE_BRUSH));
 869     if (page > 1 && is_last_preview_page(page - 1)) return;
 870     lpFr->chrg.cpMin = page <= 1 ? 0 : preview.pageEnds[page-2];
 871     bottom = lpFr->rc.bottom;
 872     preview.pageEnds[page-1] = SendMessageW(hEditorWnd, EM_FORMATRANGE, TRUE, (LPARAM)lpFr);
 873
 874     /* EM_FORMATRANGE sets fr.rc.bottom to indicate the area printed in,
 875      * but we want to keep the original for drawing margins */
 876     lpFr->rc.bottom = bottom;
 877     SendMessageW(hEditorWnd, EM_FORMATRANGE, FALSE, 0);
 878 }
 879
 880 static void update_preview_buttons(HWND hMainWnd)
 881 {
 882     HWND hReBar = GetDlgItem(hMainWnd, IDC_REBAR);
 883     EnableWindow(GetDlgItem(hReBar, ID_PREVIEW_PREVPAGE), preview.page > 1);
 884     EnableWindow(GetDlgItem(hReBar, ID_PREVIEW_NEXTPAGE),
 885                  !is_last_preview_page(preview.page) &&
 886                  !is_last_preview_page(preview.page + preview.pages_shown - 1));
 887     EnableWindow(GetDlgItem(hReBar, ID_PREVIEW_NUMPAGES),
 888                  preview.pages_shown > 1 ||
 889                  (!is_last_preview_page(1) && preview.zoomlevel == 0));
 890     EnableWindow(GetDlgItem(hReBar, ID_PREVIEW_ZOOMIN), preview.zoomlevel < 2);
 891     EnableWindow(GetDlgItem(hReBar, ID_PREVIEW_ZOOMOUT), preview.zoomlevel > 0);
 892 }
 893
 894 static LRESULT print_preview(HWND hwndPreview)
 895 {
 896     HDC hdc;
 897     RECT window, background;
 898     PAINTSTRUCT ps;
 899     POINT scrollpos;
 900
 901     hdc = BeginPaint(hwndPreview, &ps);
 902     GetClientRect(hwndPreview, &window);
 903
 904     FillRect(hdc, &window, GetStockObject(GRAY_BRUSH));
 905
 906     scrollpos.x = GetScrollPos(hwndPreview, SB_HORZ);
 907     scrollpos.y = GetScrollPos(hwndPreview, SB_VERT);
 908
 909     background.left = preview.spacing.cx - 2 - scrollpos.x;
 910     background.right = background.left + preview.bmScaledSize.cx + 4;
 911     background.top = preview.spacing.cy - 2 - scrollpos.y;
 912     background.bottom = background.top + preview.bmScaledSize.cy + 4;
 913
 914     FillRect(hdc, &background, GetStockObject(BLACK_BRUSH));
 915
 916     if(preview.pages_shown > 1)
 917     {
 918         background.left += preview.bmScaledSize.cx + preview.spacing.cx;
 919         background.right += preview.bmScaledSize.cx + preview.spacing.cx;
 920
 921         FillRect(hdc, &background, GetStockObject(BLACK_BRUSH));
 922     }
 923
 924     BitBlt(hdc, preview.spacing.cx - scrollpos.x, preview.spacing.cy - scrollpos.y,
 925            preview.bmScaledSize.cx, preview.bmScaledSize.cy,
 926            preview.hdcSized, 0, 0, SRCCOPY);
 927
 928     if(preview.pages_shown > 1)
 929     {
 930         BitBlt(hdc, preview.spacing.cx * 2 + preview.bmScaledSize.cx - scrollpos.x,
 931                preview.spacing.cy - scrollpos.y, preview.bmScaledSize.cx,
 932                preview.bmScaledSize.cy, preview.hdcSized2, 0, 0, SRCCOPY);
 933     }
 934
 935     preview.window = window;
 936
 937     EndPaint(hwndPreview, &ps);
 938
 939     return 0;
 940 }
 941
 942 static void update_preview_statusbar(HWND hMainWnd)
 943 {
 944     HWND hStatusbar = GetDlgItem(hMainWnd, IDC_STATUSBAR);
 945     HINSTANCE hInst = GetModuleHandleW(0);
 946     WCHAR *p;
 947     WCHAR wstr[MAX_STRING_LEN];
 948
 949     p = wstr;
 950     if (preview.pages_shown < 2 || is_last_preview_page(preview.page))
 951     {
 952         static const WCHAR fmt[] = {' ','%','d','\0'};
 953         p += LoadStringW(hInst, STRING_PREVIEW_PAGE, wstr, MAX_STRING_LEN);
 954         wsprintfW(p, fmt, preview.page);
 955     } else {
 956         static const WCHAR fmt[] = {' ','%','d','-','%','d','\0'};
 957         p += LoadStringW(hInst, STRING_PREVIEW_PAGES, wstr, MAX_STRING_LEN);
 958         wsprintfW(p, fmt, preview.page, preview.page + 1);
 959     }
 960     SetWindowTextW(hStatusbar, wstr);
 961 }
 962
 963 /* Update for page changes. */
 964 static void update_preview(HWND hMainWnd)
 965 {
 966     RECT paper;
 967     HWND hEditorWnd = GetDlgItem(hMainWnd, IDC_EDITOR);
 968     HWND hwndPreview = GetDlgItem(hMainWnd, IDC_PREVIEW);
 969     HBITMAP hBitmapCapture;
 970     FORMATRANGE fr;
 971     HDC hdc = GetDC(hwndPreview);
 972
 973     fr.hdcTarget = make_dc();
 974     fr.rc = fr.rcPage = preview.rcPage;
 975     fr.rc.left += margins.left;
 976     fr.rc.top += margins.top;
 977     fr.rc.bottom -= margins.bottom;
 978     fr.rc.right -= margins.right;
 979
 980     fr.chrg.cpMin = 0;
 981     fr.chrg.cpMax = preview.textlength;
 982
 983     paper.left = 0;
 984     paper.right = preview.bmSize.cx;
 985     paper.top = 0;
 986     paper.bottom = preview.bmSize.cy;
 987
 988     if (!preview.hdc) {
 989         preview.hdc = CreateCompatibleDC(hdc);
 990         hBitmapCapture = CreateCompatibleBitmap(hdc, preview.bmSize.cx, preview.bmSize.cy);
 991         SelectObject(preview.hdc, hBitmapCapture);
 992     }
 993
 994     fr.hdc = preview.hdc;
 995     draw_preview(hEditorWnd, &fr, &paper, preview.page);
 996
 997     if(preview.pages_shown > 1)
 998     {
 999         if (!preview.hdc2)
1000         {
1001             preview.hdc2 = CreateCompatibleDC(hdc);
1002             hBitmapCapture = CreateCompatibleBitmap(hdc,
1003                                                     preview.bmSize.cx,
1004                                                     preview.bmSize.cy);
1005             SelectObject(preview.hdc2, hBitmapCapture);
1006         }
1007
1008         fr.hdc = preview.hdc2;
1009         draw_preview(hEditorWnd, &fr, &fr.rcPage, preview.page + 1);
1010     }
1011     DeleteDC(fr.hdcTarget);
1012     ReleaseDC(hwndPreview, hdc);
1013
1014     update_scaled_preview(hMainWnd);
1015     update_preview_buttons(hMainWnd);
1016     update_preview_statusbar(hMainWnd);
1017 }
1018
1019 static void toggle_num_pages(HWND hMainWnd)
1020 {
1021     HWND hReBar = GetDlgItem(hMainWnd, IDC_REBAR);
1022     WCHAR name[MAX_STRING_LEN];
1023     HINSTANCE hInst = GetModuleHandleW(0);
1024     int nPreviewPages;
1025
1026     preview.pages_shown = preview.pages_shown > 1 ? 1 : 2;
1027
1028     nPreviewPages = preview.zoomlevel > 0 ? preview.saved_pages_shown :
1029                                             preview.pages_shown;
1030
1031     LoadStringW(hInst, nPreviewPages > 1 ? STRING_PREVIEW_ONEPAGE :
1032                                            STRING_PREVIEW_TWOPAGES,
1033                 name, MAX_STRING_LEN);
1034
1035     SetWindowTextW(GetDlgItem(hReBar, ID_PREVIEW_NUMPAGES), name);
1036     update_preview_sizes(GetDlgItem(hMainWnd, IDC_PREVIEW), TRUE);
1037     update_preview(hMainWnd);
1038 }
1039
1040 /* Returns the page shown that the point is in (1 or 2) or 0 if the point
1041  * isn't inside either page */
1042 static int preview_page_hittest(POINT pt)
1043 {
1044     RECT rc;
1045     rc.left = preview.spacing.cx;
1046     rc.right = rc.left + preview.bmScaledSize.cx;
1047     rc.top = preview.spacing.cy;
1048     rc.bottom = rc.top + preview.bmScaledSize.cy;
1049     if (PtInRect(&rc, pt))
1050         return 1;
1051
1052     if (preview.pages_shown <= 1)
1053         return 0;
1054
1055     rc.left += preview.bmScaledSize.cx + preview.spacing.cx;
1056     rc.right += preview.bmScaledSize.cx + preview.spacing.cx;
1057     if (PtInRect(&rc, pt))
1058         return is_last_preview_page(preview.page) ? 1 : 2;
1059
1060     return 0;
1061 }
1062
1063 LRESULT CALLBACK preview_proc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
1064 {
1065     switch(msg)
1066     {
1067         case WM_CREATE:
1068         {
1069             HWND hMainWnd = GetParent(hWnd);
1070             HWND hEditorWnd = GetDlgItem(hMainWnd, IDC_EDITOR);
1071             FORMATRANGE fr;
1072             GETTEXTLENGTHEX gt = {GTL_DEFAULT, 1200};
1073             HDC hdc = GetDC(hWnd);
1074             HDC hdcTarget = make_dc();
1075
1076             fr.rc = preview.rcPage = get_print_rect(hdcTarget);
1077             preview.rcPage.bottom += margins.bottom;
1078             preview.rcPage.right += margins.right;
1079             preview.rcPage.top = preview.rcPage.left = 0;
1080             fr.rcPage = preview.rcPage;
1081
1082             preview.bmSize.cx = twips_to_pixels(preview.rcPage.right, GetDeviceCaps(hdc, LOGPIXELSX));
1083             preview.bmSize.cy = twips_to_pixels(preview.rcPage.bottom, GetDeviceCaps(hdc, LOGPIXELSY));
1084
1085             preview.textlength = SendMessageW(hEditorWnd, EM_GETTEXTLENGTHEX, (WPARAM)&gt, 0);
1086
1087             fr.hdc = CreateCompatibleDC(hdc);
1088             fr.hdcTarget = hdcTarget;
1089             fr.chrg.cpMin = 0;
1090             fr.chrg.cpMax = preview.textlength;
1091             DeleteDC(fr.hdc);
1092             DeleteDC(hdcTarget);
1093             ReleaseDC(hWnd, hdc);
1094
1095             update_preview_sizes(hWnd, TRUE);
1096             update_preview(hMainWnd);
1097             break;
1098         }
1099
1100         case WM_PAINT:
1101             return print_preview(hWnd);
1102
1103         case WM_SIZE:
1104         {
1105             update_preview_sizes(hWnd, FALSE);
1106             update_scaled_preview(hWnd);
1107             break;
1108         }
1109
1110         case WM_VSCROLL:
1111         case WM_HSCROLL:
1112         {
1113             SCROLLINFO si;
1114             RECT rc;
1115             int nBar = (msg == WM_VSCROLL) ? SB_VERT : SB_HORZ;
1116             int origPos;
1117
1118             GetClientRect(hWnd, &rc);
1119             si.cbSize = sizeof(si);
1120             si.fMask = SIF_ALL;
1121             GetScrollInfo(hWnd, nBar, &si);
1122             origPos = si.nPos;
1123             switch(LOWORD(wParam))
1124             {
1125                 case SB_TOP: /* == SB_LEFT */
1126                     si.nPos = si.nMin;
1127                     break;
1128                 case SB_BOTTOM: /* == SB_RIGHT */
1129                     si.nPos = si.nMax;
1130                     break;
1131                 case SB_LINEUP: /* == SB_LINELEFT */
1132                     si.nPos -= si.nPage / 10;
1133                     break;
1134                 case SB_LINEDOWN: /* == SB_LINERIGHT */
1135                     si.nPos += si.nPage / 10;
1136                     break;
1137                 case SB_PAGEUP: /* == SB_PAGELEFT */
1138                     si.nPos -= si.nPage;
1139                     break;
1140                 case SB_PAGEDOWN: /* SB_PAGERIGHT */
1141                     si.nPos += si.nPage;
1142                     break;
1143                 case SB_THUMBTRACK:
1144                     si.nPos = si.nTrackPos;
1145                     break;
1146             }
1147             si.fMask = SIF_POS;
1148             SetScrollInfo(hWnd, nBar, &si, TRUE);
1149             GetScrollInfo(hWnd, nBar, &si);
1150             if (si.nPos != origPos)
1151             {
1152                 int amount = origPos - si.nPos;
1153                 if (msg == WM_VSCROLL)
1154                     ScrollWindow(hWnd, 0, amount, NULL, NULL);
1155                 else
1156                     ScrollWindow(hWnd, amount, 0, NULL, NULL);
1157             }
1158             return 0;
1159         }
1160
1161         case WM_SETCURSOR:
1162         {
1163             POINT pt;
1164             RECT rc;
1165             int bHittest = FALSE;
1166             DWORD messagePos = GetMessagePos();
1167             pt.x = (short)LOWORD(messagePos);
1168             pt.y = (short)HIWORD(messagePos);
1169             ScreenToClient(hWnd, &pt);
1170
1171             GetClientRect(hWnd, &rc);
1172             if (PtInRect(&rc, pt))
1173             {
1174                 pt.x += GetScrollPos(hWnd, SB_HORZ);
1175                 pt.y += GetScrollPos(hWnd, SB_VERT);
1176                 bHittest = preview_page_hittest(pt);
1177             }
1178
1179             if (bHittest)
1180                 SetCursor(LoadCursorW(GetModuleHandleW(0),
1181                                       MAKEINTRESOURCEW(IDC_ZOOM)));
1182             else
1183                 SetCursor(LoadCursorW(NULL, (WCHAR*)IDC_ARROW));
1184
1185             return TRUE;
1186         }
1187
1188         case WM_LBUTTONDOWN:
1189         {
1190             int page;
1191             POINT pt;
1192             pt.x = (short)LOWORD(lParam) + GetScrollPos(hWnd, SB_HORZ);
1193             pt.y = (short)HIWORD(lParam) + GetScrollPos(hWnd, SB_VERT);
1194             if ((page = preview_page_hittest(pt)) > 0)
1195             {
1196                 HWND hMainWnd = GetParent(hWnd);
1197
1198                 /* Convert point from client coordinate to unzoomed page
1199                  * coordinate. */
1200                 pt.x -= preview.spacing.cx;
1201                 if (page > 1)
1202                     pt.x -= preview.bmScaledSize.cx + preview.spacing.cx;
1203                 pt.y -= preview.spacing.cy;
1204                 pt.x /= preview.zoomratio;
1205                 pt.y /= preview.zoomratio;
1206
1207                 if (preview.zoomlevel == 0)
1208                     preview.saved_pages_shown = preview.pages_shown;
1209                 preview.zoomlevel = (preview.zoomlevel + 1) % 3;
1210                 preview.zoomratio = 0;
1211                 if (preview.zoomlevel == 0 && preview.saved_pages_shown > 1)
1212                 {
1213                     toggle_num_pages(hMainWnd);
1214                 } else if (preview.pages_shown > 1) {
1215                     if (page >= 2) preview.page++;
1216                     toggle_num_pages(hMainWnd);
1217                 } else {
1218                     update_preview_sizes(hWnd, TRUE);
1219                     update_scaled_preview(hMainWnd);
1220                     update_preview_buttons(hMainWnd);
1221                 }
1222
1223                 if (preview.zoomlevel > 0) {
1224                     SCROLLINFO si;
1225                     /* Convert the coordinate back to client coordinate. */
1226                     pt.x *= preview.zoomratio;
1227                     pt.y *= preview.zoomratio;
1228                     pt.x += preview.spacing.cx;
1229                     pt.y += preview.spacing.cy;
1230                     /* Scroll to center view at that point on the page */
1231                     si.cbSize = sizeof(si);
1232                     si.fMask = SIF_PAGE;
1233                     GetScrollInfo(hWnd, SB_HORZ, &si);
1234                     pt.x -= si.nPage / 2;
1235                     SetScrollPos(hWnd, SB_HORZ, pt.x, TRUE);
1236                     GetScrollInfo(hWnd, SB_VERT, &si);
1237                     pt.y -= si.nPage / 2;
1238                     SetScrollPos(hWnd, SB_VERT, pt.y, TRUE);
1239                 }
1240             }
1241         }
1242
1243         default:
1244             return DefWindowProcW(hWnd, msg, wParam, lParam);
1245     }
1246
1247     return 0;
1248 }
1249
1250 LRESULT preview_command(HWND hWnd, WPARAM wParam)
1251 {
1252     switch(LOWORD(wParam))
1253     {
1254         case ID_FILE_EXIT:
1255             PostMessageW(hWnd, WM_CLOSE, 0, 0);
1256             break;
1257
1258         case ID_PREVIEW_NEXTPAGE:
1259         case ID_PREVIEW_PREVPAGE:
1260         {
1261             if(LOWORD(wParam) == ID_PREVIEW_NEXTPAGE)
1262                 preview.page++;
1263             else
1264                 preview.page--;
1265
1266             update_preview(hWnd);
1267         }
1268         break;
1269
1270         case ID_PREVIEW_NUMPAGES:
1271             toggle_num_pages(hWnd);
1272             break;
1273
1274         case ID_PREVIEW_ZOOMIN:
1275             if (preview.zoomlevel < 2)
1276             {
1277                 if (preview.zoomlevel == 0)
1278                     preview.saved_pages_shown = preview.pages_shown;
1279                 preview.zoomlevel++;
1280                 preview.zoomratio = 0;
1281                 if (preview.pages_shown > 1)
1282                 {
1283                     /* Forced switch to one page when zooming in. */
1284                     toggle_num_pages(hWnd);
1285                 } else {
1286                     HWND hwndPreview = GetDlgItem(hWnd, IDC_PREVIEW);
1287                     update_preview_sizes(hwndPreview, TRUE);
1288                     update_scaled_preview(hWnd);
1289                     update_preview_buttons(hWnd);
1290                 }
1291             }
1292             break;
1293
1294         case ID_PREVIEW_ZOOMOUT:
1295             if (preview.zoomlevel > 0)
1296             {
1297                 HWND hwndPreview = GetDlgItem(hWnd, IDC_PREVIEW);
1298                 preview.zoomlevel--;
1299                 preview.zoomratio = 0;
1300                 if (preview.zoomlevel == 0 && preview.saved_pages_shown > 1) {
1301                     toggle_num_pages(hWnd);
1302                 } else {
1303                     update_preview_sizes(hwndPreview, TRUE);
1304                     update_scaled_preview(hWnd);
1305                     update_preview_buttons(hWnd);
1306                 }
1307             }
1308             break;
1309
1310         case ID_PRINT:
1311             dialog_print(hWnd, preview.wszFileName);
1312             SendMessageW(hWnd, WM_CLOSE, 0, 0);
1313             break;
1314     }
1315
1316     return 0;
1317 }