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Sweden-Number/programs/wordpad/print.c

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/*
* Wordpad implementation - Printing and print preview functions
*
* Copyright 2007-2008 by Alexander N. Sørnes <alex@thehandofagony.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include <windows.h>
#include <richedit.h>
#include <commctrl.h>
#include "wordpad.h"
typedef struct _previewinfo
{
int page;
int pages_shown;
int saved_pages_shown;
int *pageEnds, pageCapacity;
int textlength;
HDC hdc;
HDC hdc2;
HDC hdcSized;
HDC hdcSized2;
RECT window;
RECT rcPage;
SIZE bmSize;
SIZE bmScaledSize;
SIZE spacing;
float zoomratio;
int zoomlevel;
LPWSTR wszFileName;
} previewinfo, *ppreviewinfo;
static HGLOBAL devMode;
static HGLOBAL devNames;
static RECT margins;
static previewinfo preview;
extern const WCHAR wszPreviewWndClass[];
static const WCHAR var_pagemargin[] = {'P','a','g','e','M','a','r','g','i','n',0};
static const WCHAR var_previewpages[] = {'P','r','e','v','i','e','w','P','a','g','e','s',0};
static LPWSTR get_print_file_filter(HWND hMainWnd)
{
static WCHAR wszPrintFilter[MAX_STRING_LEN*2+6+4+1];
const WCHAR files_prn[] = {'*','.','P','R','N',0};
const WCHAR files_all[] = {'*','.','*','\0'};
LPWSTR p;
HINSTANCE hInstance = GetModuleHandleW(0);
p = wszPrintFilter;
LoadStringW(hInstance, STRING_PRINTER_FILES_PRN, p, MAX_STRING_LEN);
p += lstrlenW(p) + 1;
lstrcpyW(p, files_prn);
p += lstrlenW(p) + 1;
LoadStringW(hInstance, STRING_ALL_FILES, p, MAX_STRING_LEN);
p += lstrlenW(p) + 1;
lstrcpyW(p, files_all);
p += lstrlenW(p) + 1;
*p = 0;
return wszPrintFilter;
}
void registry_set_pagemargins(HKEY hKey)
{
RegSetValueExW(hKey, var_pagemargin, 0, REG_BINARY, (LPBYTE)&margins, sizeof(RECT));
}
void registry_read_pagemargins(HKEY hKey)
{
DWORD size = sizeof(RECT);
if(!hKey || RegQueryValueExW(hKey, var_pagemargin, 0, NULL, (LPBYTE)&margins,
&size) != ERROR_SUCCESS || size != sizeof(RECT))
{
margins.top = 1417;
margins.bottom = 1417;
margins.left = 1757;
margins.right = 1757;
}
}
void registry_set_previewpages(HKEY hKey)
{
RegSetValueExW(hKey, var_previewpages, 0, REG_DWORD,
(LPBYTE)&preview.pages_shown, sizeof(DWORD));
}
void registry_read_previewpages(HKEY hKey)
{
DWORD size = sizeof(DWORD);
if(!hKey ||
RegQueryValueExW(hKey, var_previewpages, 0, NULL,
(LPBYTE)&preview.pages_shown, &size) != ERROR_SUCCESS ||
size != sizeof(DWORD))
{
preview.pages_shown = 1;
} else {
if (preview.pages_shown < 1) preview.pages_shown = 1;
else if (preview.pages_shown > 2) preview.pages_shown = 2;
}
}
static void AddTextButton(HWND hRebarWnd, UINT string, UINT command, UINT id)
{
REBARBANDINFOW rb;
HINSTANCE hInstance = GetModuleHandleW(0);
WCHAR text[MAX_STRING_LEN];
HWND hButton;
LoadStringW(hInstance, string, text, MAX_STRING_LEN);
hButton = CreateWindowW(WC_BUTTONW, text,
WS_VISIBLE | WS_CHILD, 5, 5, 100, 15,
hRebarWnd, ULongToHandle(command), hInstance, NULL);
rb.cbSize = REBARBANDINFOW_V6_SIZE;
rb.fMask = RBBIM_SIZE | RBBIM_CHILDSIZE | RBBIM_STYLE | RBBIM_CHILD | RBBIM_IDEALSIZE | RBBIM_ID;
rb.fStyle = RBBS_NOGRIPPER | RBBS_VARIABLEHEIGHT;
rb.hwndChild = hButton;
rb.cyChild = rb.cyMinChild = 22;
rb.cx = rb.cxMinChild = 90;
rb.cxIdeal = 100;
rb.wID = id;
SendMessageW(hRebarWnd, RB_INSERTBAND, -1, (LPARAM)&rb);
}
static HDC make_dc(void)
{
if(devNames && devMode)
{
LPDEVNAMES dn = GlobalLock(devNames);
LPDEVMODEW dm = GlobalLock(devMode);
HDC ret;
ret = CreateDCW((LPWSTR)dn + dn->wDriverOffset,
(LPWSTR)dn + dn->wDeviceOffset, 0, dm);
GlobalUnlock(dn);
GlobalUnlock(dm);
return ret;
} else
{
return 0;
}
}
static LONG twips_to_centmm(int twips)
{
return MulDiv(twips, CENTMM_PER_INCH, TWIPS_PER_INCH);
}
static LONG centmm_to_twips(int mm)
{
return MulDiv(mm, TWIPS_PER_INCH, CENTMM_PER_INCH);
}
static LONG twips_to_pixels(int twips, int dpi)
{
return MulDiv(twips, dpi, TWIPS_PER_INCH);
}
static LONG devunits_to_twips(int units, int dpi)
{
return MulDiv(units, TWIPS_PER_INCH, dpi);
}
static RECT get_print_rect(HDC hdc)
{
RECT rc;
int width, height;
if(hdc)
{
int dpiY = GetDeviceCaps(hdc, LOGPIXELSY);
int dpiX = GetDeviceCaps(hdc, LOGPIXELSX);
width = devunits_to_twips(GetDeviceCaps(hdc, PHYSICALWIDTH), dpiX);
height = devunits_to_twips(GetDeviceCaps(hdc, PHYSICALHEIGHT), dpiY);
} else
{
width = centmm_to_twips(18500);
height = centmm_to_twips(27000);
}
rc.left = margins.left;
rc.right = width - margins.right;
rc.top = margins.top;
rc.bottom = height - margins.bottom;
return rc;
}
void target_device(HWND hMainWnd, DWORD wordWrap)
{
HWND hEditorWnd = GetDlgItem(hMainWnd, IDC_EDITOR);
if(wordWrap == ID_WORDWRAP_MARGIN)
{
int width = 0;
LRESULT result;
HDC hdc = make_dc();
RECT rc = get_print_rect(hdc);
width = rc.right - rc.left;
if(!hdc)
{
HDC hMaindc = GetDC(hMainWnd);
hdc = CreateCompatibleDC(hMaindc);
ReleaseDC(hMainWnd, hMaindc);
}
result = SendMessageW(hEditorWnd, EM_SETTARGETDEVICE, (WPARAM)hdc, width);
DeleteDC(hdc);
if (result)
return;
/* otherwise EM_SETTARGETDEVICE failed, so fall back on wrapping
* to window using the NULL DC. */
}
if (wordWrap != ID_WORDWRAP_NONE) {
SendMessageW(hEditorWnd, EM_SETTARGETDEVICE, 0, 0);
} else {
SendMessageW(hEditorWnd, EM_SETTARGETDEVICE, 0, 1);
}
}
static LPWSTR dialog_print_to_file(HWND hMainWnd)
{
OPENFILENAMEW ofn;
static WCHAR file[MAX_PATH] = {'O','U','T','P','U','T','.','P','R','N',0};
static const WCHAR defExt[] = {'P','R','N',0};
static LPWSTR file_filter;
if(!file_filter)
file_filter = get_print_file_filter(hMainWnd);
ZeroMemory(&ofn, sizeof(ofn));
ofn.lStructSize = sizeof(ofn);
ofn.Flags = OFN_PATHMUSTEXIST | OFN_HIDEREADONLY | OFN_OVERWRITEPROMPT;
ofn.hwndOwner = hMainWnd;
ofn.lpstrFilter = file_filter;
ofn.lpstrFile = file;
ofn.nMaxFile = MAX_PATH;
ofn.lpstrDefExt = defExt;
if(GetSaveFileNameW(&ofn))
return file;
else
return FALSE;
}
static void char_from_pagenum(HWND hEditorWnd, FORMATRANGE *fr, int page)
{
int i;
fr->chrg.cpMin = 0;
for(i = 1; i < page; i++)
{
int bottom = fr->rc.bottom;
fr->chrg.cpMin = SendMessageW(hEditorWnd, EM_FORMATRANGE, FALSE, (LPARAM)fr);
fr->rc.bottom = bottom;
}
}
static HWND get_ruler_wnd(HWND hMainWnd)
{
return GetDlgItem(GetDlgItem(hMainWnd, IDC_REBAR), IDC_RULER);
}
void redraw_ruler(HWND hRulerWnd)
{
RECT rc;
GetClientRect(hRulerWnd, &rc);
InvalidateRect(hRulerWnd, &rc, TRUE);
}
static void update_ruler(HWND hRulerWnd)
{
SendMessageW(hRulerWnd, WM_USER, 0, 0);
redraw_ruler(hRulerWnd);
}
static void add_ruler_units(HDC hdcRuler, RECT* drawRect, BOOL NewMetrics, LONG EditLeftmost)
{
static HDC hdc;
if(NewMetrics)
{
static HBITMAP hBitmap;
int i, x, y, RulerTextEnd;
int CmPixels;
int QuarterCmPixels;
HFONT hFont;
WCHAR FontName[] = {'M','S',' ','S','a','n','s',' ','S','e','r','i','f',0};
if(hdc)
{
DeleteDC(hdc);
DeleteObject(hBitmap);
}
hdc = CreateCompatibleDC(0);
CmPixels = twips_to_pixels(centmm_to_twips(1000), GetDeviceCaps(hdc, LOGPIXELSX));
QuarterCmPixels = (int)((float)CmPixels / 4.0);
hBitmap = CreateCompatibleBitmap(hdc, drawRect->right, drawRect->bottom);
SelectObject(hdc, hBitmap);
FillRect(hdc, drawRect, GetStockObject(WHITE_BRUSH));
hFont = CreateFontW(10, 6, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, FontName);
SelectObject(hdc, hFont);
SetBkMode(hdc, TRANSPARENT);
SetTextAlign(hdc, TA_CENTER);
y = (int)(((float)drawRect->bottom - (float)drawRect->top) / 2.0) + 1;
RulerTextEnd = drawRect->right - EditLeftmost + 1;
for(i = 1, x = EditLeftmost; x < (drawRect->right - EditLeftmost + 1); i ++)
{
WCHAR str[3];
WCHAR format[] = {'%','d',0};
int x2 = x;
x2 += QuarterCmPixels;
if(x2 > RulerTextEnd)
break;
MoveToEx(hdc, x2, y, NULL);
LineTo(hdc, x2, y+2);
x2 += QuarterCmPixels;
if(x2 > RulerTextEnd)
break;
MoveToEx(hdc, x2, y - 3, NULL);
LineTo(hdc, x2, y + 3);
x2 += QuarterCmPixels;
if(x2 > RulerTextEnd)
break;
MoveToEx(hdc, x2, y, NULL);
LineTo(hdc, x2, y+2);
x += CmPixels;
if(x > RulerTextEnd)
break;
wsprintfW(str, format, i);
TextOutW(hdc, x, 5, str, lstrlenW(str));
}
DeleteObject(hFont);
}
BitBlt(hdcRuler, 0, 0, drawRect->right, drawRect->bottom, hdc, 0, 0, SRCAND);
}
static void paint_ruler(HWND hWnd, LONG EditLeftmost, BOOL NewMetrics)
{
PAINTSTRUCT ps;
HDC hdc = BeginPaint(hWnd, &ps);
HDC hdcPrint = make_dc();
RECT printRect = get_print_rect(hdcPrint);
RECT drawRect;
HBRUSH hBrush = CreateSolidBrush(GetSysColor(COLOR_MENU));
GetClientRect(hWnd, &drawRect);
FillRect(hdc, &drawRect, hBrush);
drawRect.top += 3;
drawRect.bottom -= 3;
drawRect.left = EditLeftmost;
drawRect.right = twips_to_pixels(printRect.right - margins.left, GetDeviceCaps(hdc, LOGPIXELSX));
FillRect(hdc, &drawRect, GetStockObject(WHITE_BRUSH));
drawRect.top--;
drawRect.bottom++;
DrawEdge(hdc, &drawRect, EDGE_SUNKEN, BF_RECT);
drawRect.left = drawRect.right - 1;
drawRect.right = twips_to_pixels(printRect.right + margins.right - margins.left, GetDeviceCaps(hdc, LOGPIXELSX));
DrawEdge(hdc, &drawRect, EDGE_ETCHED, BF_RECT);
drawRect.left = 0;
drawRect.top = 0;
add_ruler_units(hdc, &drawRect, NewMetrics, EditLeftmost);
SelectObject(hdc, GetStockObject(BLACK_BRUSH));
DeleteObject(hBrush);
DeleteDC(hdcPrint);
EndPaint(hWnd, &ps);
}
LRESULT CALLBACK ruler_proc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
static WNDPROC pPrevRulerProc;
static LONG EditLeftmost;
static BOOL NewMetrics;
switch(msg)
{
case WM_USER:
if(wParam)
{
EditLeftmost = ((POINTL*)wParam)->x;
pPrevRulerProc = (WNDPROC)lParam;
}
NewMetrics = TRUE;
break;
case WM_PAINT:
paint_ruler(hWnd, EditLeftmost, NewMetrics);
break;
default:
return CallWindowProcW(pPrevRulerProc, hWnd, msg, wParam, lParam);
}
return 0;
}
static void print(LPPRINTDLGW pd, LPWSTR wszFileName)
{
FORMATRANGE fr;
DOCINFOW di;
HWND hEditorWnd = GetDlgItem(pd->hwndOwner, IDC_EDITOR);
int printedPages = 0;
fr.hdc = pd->hDC;
fr.hdcTarget = pd->hDC;
fr.rc = get_print_rect(fr.hdc);
fr.rcPage.left = 0;
fr.rcPage.right = fr.rc.right + margins.right;
fr.rcPage.top = 0;
fr.rcPage.bottom = fr.rc.bottom + margins.bottom;
ZeroMemory(&di, sizeof(di));
di.cbSize = sizeof(di);
di.lpszDocName = wszFileName;
if(pd->Flags & PD_PRINTTOFILE)
{
di.lpszOutput = dialog_print_to_file(pd->hwndOwner);
if(!di.lpszOutput)
return;
}
if(pd->Flags & PD_SELECTION)
{
SendMessageW(hEditorWnd, EM_EXGETSEL, 0, (LPARAM)&fr.chrg);
} else
{
GETTEXTLENGTHEX gt;
gt.flags = GTL_DEFAULT;
gt.codepage = 1200;
fr.chrg.cpMin = 0;
fr.chrg.cpMax = SendMessageW(hEditorWnd, EM_GETTEXTLENGTHEX, (WPARAM)&gt, 0);
if(pd->Flags & PD_PAGENUMS)
char_from_pagenum(hEditorWnd, &fr, pd->nToPage);
}
StartDocW(fr.hdc, &di);
do
{
if(StartPage(fr.hdc) <= 0)
break;
fr.chrg.cpMin = SendMessageW(hEditorWnd, EM_FORMATRANGE, TRUE, (LPARAM)&fr);
if(EndPage(fr.hdc) <= 0)
break;
printedPages++;
if((pd->Flags & PD_PAGENUMS) && (printedPages > (pd->nToPage - pd->nFromPage)))
break;
}
while(fr.chrg.cpMin && fr.chrg.cpMin < fr.chrg.cpMax);
EndDoc(fr.hdc);
SendMessageW(hEditorWnd, EM_FORMATRANGE, FALSE, 0);
}
void dialog_printsetup(HWND hMainWnd)
{
PAGESETUPDLGW ps;
ZeroMemory(&ps, sizeof(ps));
ps.lStructSize = sizeof(ps);
ps.hwndOwner = hMainWnd;
ps.Flags = PSD_INHUNDREDTHSOFMILLIMETERS | PSD_MARGINS;
ps.rtMargin.left = twips_to_centmm(margins.left);
ps.rtMargin.right = twips_to_centmm(margins.right);
ps.rtMargin.top = twips_to_centmm(margins.top);
ps.rtMargin.bottom = twips_to_centmm(margins.bottom);
ps.hDevMode = devMode;
ps.hDevNames = devNames;
if(PageSetupDlgW(&ps))
{
margins.left = centmm_to_twips(ps.rtMargin.left);
margins.right = centmm_to_twips(ps.rtMargin.right);
margins.top = centmm_to_twips(ps.rtMargin.top);
margins.bottom = centmm_to_twips(ps.rtMargin.bottom);
devMode = ps.hDevMode;
devNames = ps.hDevNames;
update_ruler(get_ruler_wnd(hMainWnd));
}
}
void get_default_printer_opts(void)
{
PRINTDLGW pd;
ZeroMemory(&pd, sizeof(pd));
ZeroMemory(&pd, sizeof(pd));
pd.lStructSize = sizeof(pd);
pd.Flags = PD_RETURNDC | PD_RETURNDEFAULT;
pd.hDevMode = devMode;
PrintDlgW(&pd);
devMode = pd.hDevMode;
devNames = pd.hDevNames;
}
void print_quick(HWND hMainWnd, LPWSTR wszFileName)
{
PRINTDLGW pd;
ZeroMemory(&pd, sizeof(pd));
pd.hwndOwner = hMainWnd;
pd.hDC = make_dc();
print(&pd, wszFileName);
DeleteDC(pd.hDC);
}
void dialog_print(HWND hMainWnd, LPWSTR wszFileName)
{
PRINTDLGW pd;
HWND hEditorWnd = GetDlgItem(hMainWnd, IDC_EDITOR);
int from = 0;
int to = 0;
ZeroMemory(&pd, sizeof(pd));
pd.lStructSize = sizeof(pd);
pd.hwndOwner = hMainWnd;
pd.Flags = PD_RETURNDC | PD_USEDEVMODECOPIESANDCOLLATE;
pd.nMinPage = 1;
pd.nMaxPage = -1;
pd.hDevMode = devMode;
pd.hDevNames = devNames;
SendMessageW(hEditorWnd, EM_GETSEL, (WPARAM)&from, (LPARAM)&to);
if(from == to)
pd.Flags |= PD_NOSELECTION;
if(PrintDlgW(&pd))
{
devMode = pd.hDevMode;
devNames = pd.hDevNames;
print(&pd, wszFileName);
update_ruler(get_ruler_wnd(hMainWnd));
}
}
static void preview_bar_show(HWND hMainWnd, BOOL show)
{
HWND hReBar = GetDlgItem(hMainWnd, IDC_REBAR);
int i;
if(show)
{
REBARBANDINFOW rb;
HWND hStatic;
UINT num_pages_string = preview.pages_shown > 1 ? STRING_PREVIEW_ONEPAGE :
STRING_PREVIEW_TWOPAGES;
AddTextButton(hReBar, STRING_PREVIEW_PRINT, ID_PRINT, BANDID_PREVIEW_BTN1);
AddTextButton(hReBar, STRING_PREVIEW_NEXTPAGE, ID_PREVIEW_NEXTPAGE, BANDID_PREVIEW_BTN2);
AddTextButton(hReBar, STRING_PREVIEW_PREVPAGE, ID_PREVIEW_PREVPAGE, BANDID_PREVIEW_BTN3);
AddTextButton(hReBar, num_pages_string, ID_PREVIEW_NUMPAGES, BANDID_PREVIEW_BTN4);
AddTextButton(hReBar, STRING_PREVIEW_ZOOMIN, ID_PREVIEW_ZOOMIN, BANDID_PREVIEW_BTN5);
AddTextButton(hReBar, STRING_PREVIEW_ZOOMOUT, ID_PREVIEW_ZOOMOUT, BANDID_PREVIEW_BTN6);
AddTextButton(hReBar, STRING_PREVIEW_CLOSE, ID_FILE_EXIT, BANDID_PREVIEW_BTN7);
hStatic = CreateWindowW(WC_STATICW, NULL,
WS_VISIBLE | WS_CHILD, 0, 0, 0, 0,
hReBar, NULL, NULL, NULL);
rb.cbSize = REBARBANDINFOW_V6_SIZE;
rb.fMask = RBBIM_SIZE | RBBIM_CHILDSIZE | RBBIM_STYLE | RBBIM_CHILD | RBBIM_IDEALSIZE | RBBIM_ID;
rb.fStyle = RBBS_NOGRIPPER | RBBS_VARIABLEHEIGHT;
rb.hwndChild = hStatic;
rb.cyChild = rb.cyMinChild = 22;
rb.cx = rb.cxMinChild = 90;
rb.cxIdeal = 100;
rb.wID = BANDID_PREVIEW_BUFFER;
SendMessageW(hReBar, RB_INSERTBAND, -1, (LPARAM)&rb);
} else
{
for(i = 0; i <= PREVIEW_BUTTONS; i++)
SendMessageW(hReBar, RB_DELETEBAND, SendMessageW(hReBar, RB_IDTOINDEX, BANDID_PREVIEW_BTN1+i, 0), 0);
}
}
static const int min_spacing = 10;
static void update_preview_scrollbars(HWND hwndPreview, RECT *window)
{
SCROLLINFO sbi;
sbi.cbSize = sizeof(sbi);
sbi.fMask = SIF_PAGE|SIF_RANGE;
sbi.nMin = 0;
if (preview.zoomlevel == 0)
{
/* Hide scrollbars when zoomed out. */
sbi.nMax = 0;
sbi.nPage = window->right;
SetScrollInfo(hwndPreview, SB_HORZ, &sbi, TRUE);
sbi.nPage = window->bottom;
SetScrollInfo(hwndPreview, SB_VERT, &sbi, TRUE);
} else {
sbi.nMax = preview.bmScaledSize.cx * preview.pages_shown +
min_spacing * (preview.pages_shown + 1);
sbi.nPage = window->right;
SetScrollInfo(hwndPreview, SB_HORZ, &sbi, TRUE);
/* Change in the horizontal scrollbar visibility affects the
* client rect, so update the client rect. */
GetClientRect(hwndPreview, window);
sbi.nMax = preview.bmScaledSize.cy + min_spacing * 2;
sbi.nPage = window->bottom;
SetScrollInfo(hwndPreview, SB_VERT, &sbi, TRUE);
}
}
static void update_preview_sizes(HWND hwndPreview, BOOL zoomLevelUpdated)
{
RECT window;
GetClientRect(hwndPreview, &window);
/* The zoom ratio isn't updated for partial zoom because of resizing the window. */
if (zoomLevelUpdated || preview.zoomlevel != 1)
{
float ratio, ratioHeight, ratioWidth;
if (preview.zoomlevel == 2)
{
ratio = 1.0;
} else {
ratioHeight = (window.bottom - min_spacing * 2) / (float)preview.bmSize.cy;
ratioWidth = (float)(window.right -
min_spacing * (preview.pages_shown + 1)) /
(preview.pages_shown * preview.bmSize.cx);
if(ratioWidth > ratioHeight)
ratio = ratioHeight;
else
ratio = ratioWidth;
if (preview.zoomlevel == 1)
ratio += (1.0 - ratio) / 2;
}
preview.zoomratio = ratio;
}
preview.bmScaledSize.cx = preview.bmSize.cx * preview.zoomratio;
preview.bmScaledSize.cy = preview.bmSize.cy * preview.zoomratio;
preview.spacing.cy = max(min_spacing, (window.bottom - preview.bmScaledSize.cy) / 2);
preview.spacing.cx = (window.right -
preview.bmScaledSize.cx * preview.pages_shown) /
(preview.pages_shown + 1);
if (preview.spacing.cx < min_spacing)
preview.spacing.cx = min_spacing;
update_preview_scrollbars(hwndPreview, &window);
}
static void draw_preview_page(HDC hdc, HDC* hdcSized, FORMATRANGE* lpFr, float ratio, int bmNewWidth, int bmNewHeight, int bmWidth, int bmHeight, BOOL draw_margins)
{
HBITMAP hBitmapScaled = CreateCompatibleBitmap(hdc, bmNewWidth, bmNewHeight);
HBITMAP oldbm;
HPEN hPen, oldPen;
int TopMargin = (int)((float)twips_to_pixels(lpFr->rc.top, GetDeviceCaps(hdc, LOGPIXELSX)) * ratio);
int BottomMargin = (int)((float)twips_to_pixels(lpFr->rc.bottom, GetDeviceCaps(hdc, LOGPIXELSX)) * ratio);
int LeftMargin = (int)((float)twips_to_pixels(lpFr->rc.left, GetDeviceCaps(hdc, LOGPIXELSY)) * ratio);
int RightMargin = (int)((float)twips_to_pixels(lpFr->rc.right, GetDeviceCaps(hdc, LOGPIXELSY)) * ratio);
if(*hdcSized) {
oldbm = SelectObject(*hdcSized, hBitmapScaled);
DeleteObject(oldbm);
} else {
*hdcSized = CreateCompatibleDC(hdc);
SelectObject(*hdcSized, hBitmapScaled);
}
StretchBlt(*hdcSized, 0, 0, bmNewWidth, bmNewHeight, hdc, 0, 0, bmWidth, bmHeight, SRCCOPY);
if (!draw_margins) return;
/* Draw margin lines */
hPen = CreatePen(PS_DOT, 1, RGB(0,0,0));
oldPen = SelectObject(*hdcSized, hPen);
MoveToEx(*hdcSized, 0, TopMargin, NULL);
LineTo(*hdcSized, bmNewWidth, TopMargin);
MoveToEx(*hdcSized, 0, BottomMargin, NULL);
LineTo(*hdcSized, bmNewWidth, BottomMargin);
MoveToEx(*hdcSized, LeftMargin, 0, NULL);
LineTo(*hdcSized, LeftMargin, bmNewHeight);
MoveToEx(*hdcSized, RightMargin, 0, NULL);
LineTo(*hdcSized, RightMargin, bmNewHeight);
SelectObject(*hdcSized, oldPen);
DeleteObject(hPen);
}
static BOOL is_last_preview_page(int page)
{
return preview.pageEnds[page - 1] >= preview.textlength;
}
/* Update for zoom ratio changes with same page. */
static void update_scaled_preview(HWND hMainWnd)
{
FORMATRANGE fr;
HWND hwndPreview;
/* This may occur on WM_CREATE before update_preview is called
* because a WM_SIZE message is generated from updating the
* scrollbars. */
if (!preview.hdc) return;
hwndPreview = GetDlgItem(hMainWnd, IDC_PREVIEW);
fr.hdcTarget = make_dc();
fr.rc = fr.rcPage = preview.rcPage;
fr.rc.left += margins.left;
fr.rc.top += margins.top;
fr.rc.bottom -= margins.bottom;
fr.rc.right -= margins.right;
draw_preview_page(preview.hdc, &preview.hdcSized, &fr, preview.zoomratio,
preview.bmScaledSize.cx, preview.bmScaledSize.cy,
preview.bmSize.cx, preview.bmSize.cy, TRUE);
if(preview.pages_shown > 1)
{
draw_preview_page(preview.hdc2, &preview.hdcSized2, &fr, preview.zoomratio,
preview.bmScaledSize.cx, preview.bmScaledSize.cy,
preview.bmSize.cx, preview.bmSize.cy,
!is_last_preview_page(preview.page));
}
InvalidateRect(hwndPreview, NULL, TRUE);
DeleteDC(fr.hdcTarget);
}
void init_preview(HWND hMainWnd, LPWSTR wszFileName)
{
HINSTANCE hInstance = GetModuleHandleW(0);
preview.page = 1;
preview.hdc = 0;
preview.hdc2 = 0;
preview.wszFileName = wszFileName;
preview.zoomratio = 0;
preview.zoomlevel = 0;
preview_bar_show(hMainWnd, TRUE);
CreateWindowExW(0, wszPreviewWndClass, NULL,
WS_VISIBLE | WS_CHILD | WS_VSCROLL | WS_HSCROLL,
0, 0, 200, 10, hMainWnd, (HMENU)IDC_PREVIEW, hInstance, NULL);
}
void close_preview(HWND hMainWnd)
{
HWND hwndPreview = GetDlgItem(hMainWnd, IDC_PREVIEW);
preview.window.right = 0;
preview.window.bottom = 0;
preview.page = 0;
HeapFree(GetProcessHeap(), 0, preview.pageEnds);
preview.pageEnds = NULL;
preview.pageCapacity = 0;
if (preview.zoomlevel > 0)
preview.pages_shown = preview.saved_pages_shown;
if(preview.hdc) {
HBITMAP oldbm = GetCurrentObject(preview.hdc, OBJ_BITMAP);
DeleteDC(preview.hdc);
DeleteObject(oldbm);
preview.hdc = NULL;
}
if(preview.hdc2) {
HBITMAP oldbm = GetCurrentObject(preview.hdc2, OBJ_BITMAP);
DeleteDC(preview.hdc2);
DeleteObject(oldbm);
preview.hdc2 = NULL;
}
if(preview.hdcSized) {
HBITMAP oldbm = GetCurrentObject(preview.hdcSized, OBJ_BITMAP);
DeleteDC(preview.hdcSized);
DeleteObject(oldbm);
preview.hdcSized = NULL;
}
if(preview.hdcSized2) {
HBITMAP oldbm = GetCurrentObject(preview.hdcSized2, OBJ_BITMAP);
DeleteDC(preview.hdcSized2);
DeleteObject(oldbm);
preview.hdcSized2 = NULL;
}
preview_bar_show(hMainWnd, FALSE);
DestroyWindow(hwndPreview);
}
BOOL preview_isactive(void)
{
return preview.page != 0;
}
static void draw_preview(HWND hEditorWnd, FORMATRANGE* lpFr, RECT* paper, int page)
{
int bottom;
if (!preview.pageEnds)
{
preview.pageCapacity = 32;
preview.pageEnds = HeapAlloc(GetProcessHeap(), 0,
sizeof(int) * preview.pageCapacity);
if (!preview.pageEnds) return;
} else if (page >= preview.pageCapacity) {
int *new_buffer;
new_buffer = HeapReAlloc(GetProcessHeap(), 0, preview.pageEnds,
sizeof(int) * preview.pageCapacity * 2);
if (!new_buffer) return;
preview.pageCapacity *= 2;
preview.pageEnds = new_buffer;
}
FillRect(lpFr->hdc, paper, GetStockObject(WHITE_BRUSH));
if (page > 1 && is_last_preview_page(page - 1)) return;
lpFr->chrg.cpMin = page <= 1 ? 0 : preview.pageEnds[page-2];
bottom = lpFr->rc.bottom;
preview.pageEnds[page-1] = SendMessageW(hEditorWnd, EM_FORMATRANGE, TRUE, (LPARAM)lpFr);
/* EM_FORMATRANGE sets fr.rc.bottom to indicate the area printed in,
* but we want to keep the original for drawing margins */
lpFr->rc.bottom = bottom;
SendMessageW(hEditorWnd, EM_FORMATRANGE, FALSE, 0);
}
static void update_preview_buttons(HWND hMainWnd)
{
HWND hReBar = GetDlgItem(hMainWnd, IDC_REBAR);
EnableWindow(GetDlgItem(hReBar, ID_PREVIEW_PREVPAGE), preview.page > 1);
EnableWindow(GetDlgItem(hReBar, ID_PREVIEW_NEXTPAGE),
!is_last_preview_page(preview.page) &&
!is_last_preview_page(preview.page + preview.pages_shown - 1));
EnableWindow(GetDlgItem(hReBar, ID_PREVIEW_NUMPAGES),
preview.pages_shown > 1 ||
(!is_last_preview_page(1) && preview.zoomlevel == 0));
EnableWindow(GetDlgItem(hReBar, ID_PREVIEW_ZOOMIN), preview.zoomlevel < 2);
EnableWindow(GetDlgItem(hReBar, ID_PREVIEW_ZOOMOUT), preview.zoomlevel > 0);
}
LRESULT print_preview(HWND hwndPreview)
{
HDC hdc;
RECT window, background;
PAINTSTRUCT ps;
POINT scrollpos;
hdc = BeginPaint(hwndPreview, &ps);
GetClientRect(hwndPreview, &window);
FillRect(hdc, &window, GetStockObject(GRAY_BRUSH));
scrollpos.x = GetScrollPos(hwndPreview, SB_HORZ);
scrollpos.y = GetScrollPos(hwndPreview, SB_VERT);
background.left = preview.spacing.cx - 2 - scrollpos.x;
background.right = background.left + preview.bmScaledSize.cx + 4;
background.top = preview.spacing.cy - 2 - scrollpos.y;
background.bottom = background.top + preview.bmScaledSize.cy + 4;
FillRect(hdc, &background, GetStockObject(BLACK_BRUSH));
if(preview.pages_shown > 1)
{
background.left += preview.bmScaledSize.cx + preview.spacing.cx;
background.right += preview.bmScaledSize.cx + preview.spacing.cx;
FillRect(hdc, &background, GetStockObject(BLACK_BRUSH));
}
BitBlt(hdc, preview.spacing.cx - scrollpos.x, preview.spacing.cy - scrollpos.y,
preview.bmScaledSize.cx, preview.bmScaledSize.cy,
preview.hdcSized, 0, 0, SRCCOPY);
if(preview.pages_shown > 1)
{
BitBlt(hdc, preview.spacing.cx * 2 + preview.bmScaledSize.cx - scrollpos.x,
preview.spacing.cy - scrollpos.y, preview.bmScaledSize.cx,
preview.bmScaledSize.cy, preview.hdcSized2, 0, 0, SRCCOPY);
}
preview.window = window;
EndPaint(hwndPreview, &ps);
return 0;
}
static void update_preview_statusbar(HWND hMainWnd)
{
HWND hStatusbar = GetDlgItem(hMainWnd, IDC_STATUSBAR);
HINSTANCE hInst = GetModuleHandleW(0);
WCHAR *p;
WCHAR wstr[MAX_STRING_LEN];
p = wstr;
if (preview.pages_shown < 2 || is_last_preview_page(preview.page))
{
static const WCHAR fmt[] = {' ','%','d','\0'};
p += LoadStringW(hInst, STRING_PREVIEW_PAGE, wstr, MAX_STRING_LEN);
wsprintfW(p, fmt, preview.page);
} else {
static const WCHAR fmt[] = {' ','%','d','-','%','d','\0'};
p += LoadStringW(hInst, STRING_PREVIEW_PAGES, wstr, MAX_STRING_LEN);
wsprintfW(p, fmt, preview.page, preview.page + 1);
}
SetWindowTextW(hStatusbar, wstr);
}
/* Update for page changes. */
static void update_preview(HWND hMainWnd)
{
RECT paper;
HWND hEditorWnd = GetDlgItem(hMainWnd, IDC_EDITOR);
HWND hwndPreview = GetDlgItem(hMainWnd, IDC_PREVIEW);
HBITMAP hBitmapCapture;
FORMATRANGE fr;
HDC hdc = GetDC(hwndPreview);
fr.hdcTarget = make_dc();
fr.rc = fr.rcPage = preview.rcPage;
fr.rc.left += margins.left;
fr.rc.top += margins.top;
fr.rc.bottom -= margins.bottom;
fr.rc.right -= margins.right;
fr.chrg.cpMin = 0;
fr.chrg.cpMax = preview.textlength;
paper.left = 0;
paper.right = preview.bmSize.cx;
paper.top = 0;
paper.bottom = preview.bmSize.cy;
if (!preview.hdc) {
preview.hdc = CreateCompatibleDC(hdc);
hBitmapCapture = CreateCompatibleBitmap(hdc, preview.bmSize.cx, preview.bmSize.cy);
SelectObject(preview.hdc, hBitmapCapture);
}
fr.hdc = preview.hdc;
draw_preview(hEditorWnd, &fr, &paper, preview.page);
if(preview.pages_shown > 1)
{
if (!preview.hdc2)
{
preview.hdc2 = CreateCompatibleDC(hdc);
hBitmapCapture = CreateCompatibleBitmap(hdc,
preview.bmSize.cx,
preview.bmSize.cy);
SelectObject(preview.hdc2, hBitmapCapture);
}
fr.hdc = preview.hdc2;
draw_preview(hEditorWnd, &fr, &fr.rcPage, preview.page + 1);
}
DeleteDC(fr.hdcTarget);
ReleaseDC(hwndPreview, hdc);
update_scaled_preview(hMainWnd);
update_preview_buttons(hMainWnd);
update_preview_statusbar(hMainWnd);
}
static void toggle_num_pages(HWND hMainWnd)
{
HWND hReBar = GetDlgItem(hMainWnd, IDC_REBAR);
WCHAR name[MAX_STRING_LEN];
HINSTANCE hInst = GetModuleHandleW(0);
int nPreviewPages;
preview.pages_shown = preview.pages_shown > 1 ? 1 : 2;
nPreviewPages = preview.zoomlevel > 0 ? preview.saved_pages_shown :
preview.pages_shown;
LoadStringW(hInst, nPreviewPages > 1 ? STRING_PREVIEW_ONEPAGE :
STRING_PREVIEW_TWOPAGES,
name, MAX_STRING_LEN);
SetWindowTextW(GetDlgItem(hReBar, ID_PREVIEW_NUMPAGES), name);
update_preview_sizes(GetDlgItem(hMainWnd, IDC_PREVIEW), TRUE);
update_preview(hMainWnd);
}
/* Returns the page shown that the point is in (1 or 2) or 0 if the point
* isn't inside either page */
int preview_page_hittest(POINT pt)
{
RECT rc;
rc.left = preview.spacing.cx;
rc.right = rc.left + preview.bmScaledSize.cx;
rc.top = preview.spacing.cy;
rc.bottom = rc.top + preview.bmScaledSize.cy;
if (PtInRect(&rc, pt))
return 1;
if (preview.pages_shown <= 1)
return 0;
rc.left += preview.bmScaledSize.cx + preview.spacing.cx;
rc.right += preview.bmScaledSize.cx + preview.spacing.cx;
if (PtInRect(&rc, pt))
return is_last_preview_page(preview.page) ? 1 : 2;
return 0;
}
LRESULT CALLBACK preview_proc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
switch(msg)
{
case WM_CREATE:
{
HWND hMainWnd = GetParent(hWnd);
HWND hEditorWnd = GetDlgItem(hMainWnd, IDC_EDITOR);
FORMATRANGE fr;
GETTEXTLENGTHEX gt = {GTL_DEFAULT, 1200};
HDC hdc = GetDC(hWnd);
HDC hdcTarget = make_dc();
fr.rc = preview.rcPage = get_print_rect(hdcTarget);
preview.rcPage.bottom += margins.bottom;
preview.rcPage.right += margins.right;
preview.rcPage.top = preview.rcPage.left = 0;
fr.rcPage = preview.rcPage;
preview.bmSize.cx = twips_to_pixels(preview.rcPage.right, GetDeviceCaps(hdc, LOGPIXELSX));
preview.bmSize.cy = twips_to_pixels(preview.rcPage.bottom, GetDeviceCaps(hdc, LOGPIXELSY));
preview.textlength = SendMessageW(hEditorWnd, EM_GETTEXTLENGTHEX, (WPARAM)&gt, 0);
fr.hdc = CreateCompatibleDC(hdc);
fr.hdcTarget = hdcTarget;
fr.chrg.cpMin = 0;
fr.chrg.cpMax = preview.textlength;
DeleteDC(fr.hdc);
DeleteDC(hdcTarget);
ReleaseDC(hWnd, hdc);
update_preview_sizes(hWnd, TRUE);
update_preview(hMainWnd);
break;
}
case WM_PAINT:
return print_preview(hWnd);
case WM_SIZE:
{
update_preview_sizes(hWnd, FALSE);
update_scaled_preview(hWnd);
break;
}
case WM_VSCROLL:
case WM_HSCROLL:
{
SCROLLINFO si;
RECT rc;
int nBar = (msg == WM_VSCROLL) ? SB_VERT : SB_HORZ;
int origPos;
GetClientRect(hWnd, &rc);
si.cbSize = sizeof(si);
si.fMask = SIF_ALL;
GetScrollInfo(hWnd, nBar, &si);
origPos = si.nPos;
switch(LOWORD(wParam))
{
case SB_TOP: /* == SB_LEFT */
si.nPos = si.nMin;
break;
case SB_BOTTOM: /* == SB_RIGHT */
si.nPos = si.nMax;
break;
case SB_LINEUP: /* == SB_LINELEFT */
si.nPos -= si.nPage / 10;
break;
case SB_LINEDOWN: /* == SB_LINERIGHT */
si.nPos += si.nPage / 10;
break;
case SB_PAGEUP: /* == SB_PAGELEFT */
si.nPos -= si.nPage;
break;
case SB_PAGEDOWN: /* SB_PAGERIGHT */
si.nPos += si.nPage;
break;
case SB_THUMBTRACK:
si.nPos = si.nTrackPos;
break;
}
si.fMask = SIF_POS;
SetScrollInfo(hWnd, nBar, &si, TRUE);
GetScrollInfo(hWnd, nBar, &si);
if (si.nPos != origPos)
{
int amount = origPos - si.nPos;
if (msg == WM_VSCROLL)
ScrollWindow(hWnd, 0, amount, NULL, NULL);
else
ScrollWindow(hWnd, amount, 0, NULL, NULL);
}
return 0;
}
case WM_SETCURSOR:
{
POINT pt;
RECT rc;
int bHittest = FALSE;
DWORD messagePos = GetMessagePos();
pt.x = (short)LOWORD(messagePos);
pt.y = (short)HIWORD(messagePos);
ScreenToClient(hWnd, &pt);
GetClientRect(hWnd, &rc);
if (PtInRect(&rc, pt))
{
pt.x += GetScrollPos(hWnd, SB_HORZ);
pt.y += GetScrollPos(hWnd, SB_VERT);
bHittest = preview_page_hittest(pt);
}
if (bHittest)
SetCursor(LoadCursorW(GetModuleHandleW(0),
MAKEINTRESOURCEW(IDC_ZOOM)));
else
SetCursor(LoadCursorW(NULL, (WCHAR*)IDC_ARROW));
return TRUE;
}
case WM_LBUTTONDOWN:
{
int page;
POINT pt;
pt.x = (short)LOWORD(lParam) + GetScrollPos(hWnd, SB_HORZ);
pt.y = (short)HIWORD(lParam) + GetScrollPos(hWnd, SB_VERT);
if ((page = preview_page_hittest(pt)) > 0)
{
HWND hMainWnd = GetParent(hWnd);
/* Convert point from client coordinate to unzoomed page
* coordinate. */
pt.x -= preview.spacing.cx;
if (page > 1)
pt.x -= preview.bmScaledSize.cx + preview.spacing.cx;
pt.y -= preview.spacing.cy;
pt.x /= preview.zoomratio;
pt.y /= preview.zoomratio;
if (preview.zoomlevel == 0)
preview.saved_pages_shown = preview.pages_shown;
preview.zoomlevel = (preview.zoomlevel + 1) % 3;
preview.zoomratio = 0;
if (preview.zoomlevel == 0 && preview.saved_pages_shown > 1)
{
toggle_num_pages(hMainWnd);
} else if (preview.pages_shown > 1) {
if (page >= 2) preview.page++;
toggle_num_pages(hMainWnd);
} else {
update_preview_sizes(hWnd, TRUE);
update_scaled_preview(hMainWnd);
update_preview_buttons(hMainWnd);
}
if (preview.zoomlevel > 0) {
SCROLLINFO si;
/* Convert the coordinate back to client coordinate. */
pt.x *= preview.zoomratio;
pt.y *= preview.zoomratio;
pt.x += preview.spacing.cx;
pt.y += preview.spacing.cy;
/* Scroll to center view at that point on the page */
si.cbSize = sizeof(si);
si.fMask = SIF_PAGE;
GetScrollInfo(hWnd, SB_HORZ, &si);
pt.x -= si.nPage / 2;
SetScrollPos(hWnd, SB_HORZ, pt.x, TRUE);
GetScrollInfo(hWnd, SB_VERT, &si);
pt.y -= si.nPage / 2;
SetScrollPos(hWnd, SB_VERT, pt.y, TRUE);
}
}
}
default:
return DefWindowProcW(hWnd, msg, wParam, lParam);
}
return 0;
}
LRESULT preview_command(HWND hWnd, WPARAM wParam)
{
switch(LOWORD(wParam))
{
case ID_FILE_EXIT:
PostMessageW(hWnd, WM_CLOSE, 0, 0);
break;
case ID_PREVIEW_NEXTPAGE:
case ID_PREVIEW_PREVPAGE:
{
if(LOWORD(wParam) == ID_PREVIEW_NEXTPAGE)
preview.page++;
else
preview.page--;
update_preview(hWnd);
}
break;
case ID_PREVIEW_NUMPAGES:
toggle_num_pages(hWnd);
break;
case ID_PREVIEW_ZOOMIN:
if (preview.zoomlevel < 2)
{
if (preview.zoomlevel == 0)
preview.saved_pages_shown = preview.pages_shown;
preview.zoomlevel++;
preview.zoomratio = 0;
if (preview.pages_shown > 1)
{
/* Forced switch to one page when zooming in. */
toggle_num_pages(hWnd);
} else {
HWND hwndPreview = GetDlgItem(hWnd, IDC_PREVIEW);
update_preview_sizes(hwndPreview, TRUE);
update_scaled_preview(hWnd);
update_preview_buttons(hWnd);
}
}
break;
case ID_PREVIEW_ZOOMOUT:
if (preview.zoomlevel > 0)
{
HWND hwndPreview = GetDlgItem(hWnd, IDC_PREVIEW);
preview.zoomlevel--;
preview.zoomratio = 0;
if (preview.zoomlevel == 0 && preview.saved_pages_shown > 1) {
toggle_num_pages(hWnd);
} else {
update_preview_sizes(hwndPreview, TRUE);
update_scaled_preview(hWnd);
update_preview_buttons(hWnd);
}
}
break;
case ID_PRINT:
dialog_print(hWnd, preview.wszFileName);
SendMessageW(hWnd, WM_CLOSE, 0, 0);
break;
}
return 0;
}
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