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2a0eb92258a60c9e96978db7351c4ef86c8f0136
wxWidgets/src/html/htmprint.cpp
Václav Slavík 2a0eb92258 fixed bug that caused assertion failure during HTML printing under wxGTK 
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@4272 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
1999-10-30 21:36:48 +00:00

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14 KiB
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/////////////////////////////////////////////////////////////////////////////
// Name: htmprint.cpp
// Purpose: html printing classes
// Author: Vaclav Slavik
// Created: 25/09/99
// RCS-ID: $Id$
// Copyright: (c) Vaclav Slavik, 1999
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
#ifdef __GNUG__
#pragma implementation
#endif
// For compilers that support precompilation, includes "wx/wx.h".
#include "wx/wxprec.h"
#include "wx/defs.h"
#ifdef __BORLANDC__
#pragma hdrstop
#endif
#ifndef WX_PRECOMP
#include "wx/wx.h"
#endif
#if wxUSE_HTML & wxUSE_PRINTING_ARCHITECTURE
#include "wx/print.h"
#include "wx/printdlg.h"
#include "wx/html/htmprint.h"
#include "wx/wxhtml.h"
#include "wx/wfstream.h"
//--------------------------------------------------------------------------------
// wxHtmlDCRenderer
//--------------------------------------------------------------------------------
wxHtmlDCRenderer::wxHtmlDCRenderer() : wxObject()
{
m_DC = NULL;
m_Width = m_Height = 0;
m_Cells = NULL;
m_Parser = new wxHtmlWinParser(NULL);
m_FS = new wxFileSystem();
m_Parser -> SetFS(m_FS);
m_Scale = 1.0;
}
wxHtmlDCRenderer::~wxHtmlDCRenderer()
{
if (m_Cells) delete m_Cells;
if (m_Parser) delete m_Parser;
if (m_FS) delete m_FS;
}
void wxHtmlDCRenderer::SetDC(wxDC *dc, int maxwidth)
{
int dx, dy;
wxDisplaySize(&dx, &dy);
m_MaxWidth = maxwidth;
#if 0
m_Scale = (float)dx * 2 / 3 / (float)maxwidth;
// let the width of A4 is approximately 2/3 the screen width
#endif
m_Scale = (float)800 / (float)maxwidth;
// for now, assume screen width = 800 => good results
m_DC = dc;
m_Parser -> SetDC(dc);
}
void wxHtmlDCRenderer::SetSize(int width, int height)
{
m_Width = (int)(width * m_Scale);
m_Height = (int)(height * m_Scale);
}
void wxHtmlDCRenderer::SetHtmlText(const wxString& html, const wxString& basepath, bool isdir)
{
if (m_DC == NULL) return;
if (m_Cells != NULL) delete m_Cells;
m_FS -> ChangePathTo(basepath, isdir);
m_DC -> SetUserScale(1.0, 1.0);
m_Cells = (wxHtmlContainerCell*) m_Parser -> Parse(html);
m_Cells -> SetIndent(0, wxHTML_INDENT_ALL, wxHTML_UNITS_PIXELS);
m_Cells -> Layout(m_Width);
}
int wxHtmlDCRenderer::Render(int x, int y, int from, int dont_render)
{
int pbreak;
if (m_Cells == NULL || m_DC == NULL) return 0;
pbreak = (int)(from * m_Scale + m_Height);
while (m_Cells -> AdjustPagebreak(&pbreak)) {}
if (!dont_render) {
int w, h;
m_DC -> GetSize(&w, &h);
float overallScale = (float)(w/(float)m_MaxWidth) / m_Scale;
m_DC -> SetUserScale(overallScale, overallScale);
m_DC -> SetBrush(*wxWHITE_BRUSH);
m_DC -> SetClippingRegion(x * m_Scale, y * m_Scale, m_Width, m_Height);
m_Cells -> Draw(*m_DC,
x * m_Scale, (y - from) * m_Scale,
y * m_Scale, pbreak + (y - from) * m_Scale);
m_DC -> DestroyClippingRegion();
}
if (pbreak < m_Cells -> GetHeight()) return (int)(pbreak / m_Scale);
else return GetTotalHeight();
}
int wxHtmlDCRenderer::GetTotalHeight()
{
if (m_Cells) return (int)(m_Cells -> GetHeight() / m_Scale);
else return 0;
}
//--------------------------------------------------------------------------------
// wxHtmlPrintout
//--------------------------------------------------------------------------------
wxHtmlPrintout::wxHtmlPrintout(const wxString& title) : wxPrintout(title)
{
m_Renderer = new wxHtmlDCRenderer;
m_RendererHdr = new wxHtmlDCRenderer;
m_NumPages = wxHTML_PRINT_MAX_PAGES;
m_Document = m_BasePath = wxEmptyString; m_BasePathIsDir = TRUE;
m_Headers[0] = m_Headers[1] = wxEmptyString;
m_Footers[0] = m_Footers[1] = wxEmptyString;
m_HeaderHeight = m_FooterHeight = 0;
SetMargins(); // to default values
}
wxHtmlPrintout::~wxHtmlPrintout()
{
delete m_Renderer;
delete m_RendererHdr;
}
bool wxHtmlPrintout::OnBeginDocument(int startPage, int endPage)
{
int pageWidth, pageHeight, mm_w, mm_h;
float ppmm_h, ppmm_v;
if (!wxPrintout::OnBeginDocument(startPage, endPage)) return FALSE;
GetPageSizePixels(&pageWidth, &pageHeight);
GetPageSizeMM(&mm_w, &mm_h);
ppmm_h = (float)pageWidth / mm_w;
ppmm_v = (float)pageHeight / mm_h;
/* prepare headers/footers renderer: */
m_RendererHdr -> SetDC(GetDC(), pageWidth);
m_RendererHdr -> SetSize(ppmm_h * (mm_w - m_MarginLeft - m_MarginTop),
ppmm_v * (mm_h - m_MarginTop - m_MarginBottom));
if (m_Headers[0] != wxEmptyString) {
m_RendererHdr -> SetHtmlText(TranslateHeader(m_Headers[0], 1));
m_HeaderHeight = m_RendererHdr -> GetTotalHeight();
}
else if (m_Headers[1] != wxEmptyString) {
m_RendererHdr -> SetHtmlText(TranslateHeader(m_Headers[1], 1));
m_HeaderHeight = m_RendererHdr -> GetTotalHeight();
}
if (m_Footers[0] != wxEmptyString) {
m_RendererHdr -> SetHtmlText(TranslateHeader(m_Footers[0], 1));
m_FooterHeight = m_RendererHdr -> GetTotalHeight();
}
else if (m_Footers[1] != wxEmptyString) {
m_RendererHdr -> SetHtmlText(TranslateHeader(m_Footers[1], 1));
m_FooterHeight = m_RendererHdr -> GetTotalHeight();
}
/* prepare main renderer: */
m_Renderer -> SetDC(GetDC(), pageWidth);
m_Renderer -> SetSize(ppmm_h * (mm_w - m_MarginLeft - m_MarginTop),
ppmm_v * (mm_h - m_MarginTop - m_MarginBottom) -
m_FooterHeight - m_HeaderHeight -
((m_HeaderHeight == 0) ? 0 : m_MarginSpace * ppmm_v) -
((m_FooterHeight == 0) ? 0 : m_MarginSpace * ppmm_v)
);
m_Renderer -> SetHtmlText(m_Document, m_BasePath, m_BasePathIsDir);
CountPages();
return TRUE;
}
bool wxHtmlPrintout::OnPrintPage(int page)
{
wxDC *dc = GetDC();
if (dc) {
if (HasPage(page))
RenderPage(dc, page);
return TRUE;
} else
return FALSE;
}
void wxHtmlPrintout::GetPageInfo(int *minPage, int *maxPage, int *selPageFrom, int *selPageTo)
{
*minPage = 1;
*maxPage = wxHTML_PRINT_MAX_PAGES;
*selPageFrom = 1;
*selPageTo = wxHTML_PRINT_MAX_PAGES;
}
bool wxHtmlPrintout::HasPage(int pageNum)
{
return (pageNum >= 1 && pageNum <= m_NumPages);
}
void wxHtmlPrintout::SetHtmlText(const wxString& html, const wxString &basepath, bool isdir)
{
m_Document = html;
m_BasePath = basepath;
m_BasePathIsDir = isdir;
}
void wxHtmlPrintout::SetHtmlFile(const wxString& htmlfile)
{
wxFileSystem fs;
wxFSFile *ff = fs.OpenFile(htmlfile);
wxInputStream *st = ff -> GetStream();
char *t = new char[st -> GetSize() + 1];
st -> Read(t, st -> GetSize());
t[st -> GetSize()] = 0;
wxString doc = wxString(t);
delete t;
delete ff;
SetHtmlText(doc, htmlfile, FALSE);
}
void wxHtmlPrintout::SetHeader(const wxString& header, int pg)
{
if (pg == wxPAGE_ALL || pg == wxPAGE_EVEN)
m_Headers[0] = header;
if (pg == wxPAGE_ALL || pg == wxPAGE_ODD)
m_Headers[1] = header;
}
void wxHtmlPrintout::SetFooter(const wxString& footer, int pg)
{
if (pg == wxPAGE_ALL || pg == wxPAGE_EVEN)
m_Footers[0] = footer;
if (pg == wxPAGE_ALL || pg == wxPAGE_ODD)
m_Footers[1] = footer;
}
void wxHtmlPrintout::CountPages()
{
wxBusyCursor wait;
int pageWidth, pageHeight, mm_w, mm_h;
float ppmm_h, ppmm_v;
GetPageSizePixels(&pageWidth, &pageHeight);
GetPageSizeMM(&mm_w, &mm_h);
ppmm_h = (float)pageWidth / mm_w;
ppmm_v = (float)pageHeight / mm_h;
int pos = 0;
m_NumPages = 0;
m_PageBreaks[0] = 0;
do {
pos = m_Renderer -> Render(ppmm_h * m_MarginLeft,
ppmm_v * (m_MarginTop + (m_HeaderHeight == 0 ? 0 : m_MarginSpace)) + m_HeaderHeight,
pos, TRUE);
m_PageBreaks[++m_NumPages] = pos;
} while (pos < m_Renderer -> GetTotalHeight());
}
void wxHtmlPrintout::RenderPage(wxDC *dc, int page)
{
wxBusyCursor wait;
int pageWidth, pageHeight, mm_w, mm_h;
float ppmm_h, ppmm_v;
GetPageSizePixels(&pageWidth, &pageHeight);
GetPageSizeMM(&mm_w, &mm_h);
ppmm_h = (float)pageWidth / mm_w;
ppmm_v = (float)pageHeight / mm_h;
m_Renderer -> SetDC(dc, pageWidth);
dc -> SetBackgroundMode(wxTRANSPARENT);
m_Renderer -> Render(ppmm_h * m_MarginLeft,
ppmm_v * (m_MarginTop + (m_HeaderHeight == 0 ? 0 : m_MarginSpace)) + m_HeaderHeight,
m_PageBreaks[page-1]);
m_RendererHdr -> SetDC(dc, pageWidth);
if (m_Headers[page % 2] != wxEmptyString) {
m_RendererHdr -> SetHtmlText(TranslateHeader(m_Headers[page % 2], page));
m_RendererHdr -> Render(ppmm_h * m_MarginLeft, ppmm_v * m_MarginTop);
}
if (m_Footers[page % 2] != wxEmptyString) {
m_RendererHdr -> SetHtmlText(TranslateHeader(m_Footers[page % 2], page));
m_RendererHdr -> Render(ppmm_h * m_MarginLeft, pageHeight - ppmm_v * m_MarginBottom - m_FooterHeight);
}
}
wxString wxHtmlPrintout::TranslateHeader(const wxString& instr, int page)
{
wxString r = instr;
wxString num;
num.Printf(wxT("%i"), page);
r.Replace(wxT("@PAGENUM@"), num);
num.Printf(wxT("%i"), m_NumPages);
r.Replace(wxT("@PAGESCNT@"), num);
return r;
}
void wxHtmlPrintout::SetMargins(float top, float bottom, float left, float right, float spaces)
{
m_MarginTop = top;
m_MarginBottom = bottom;
m_MarginLeft = left;
m_MarginRight = right;
m_MarginSpace = spaces;
}
//--------------------------------------------------------------------------------
// wxHtmlEasyPrinting
//--------------------------------------------------------------------------------
wxHtmlEasyPrinting::wxHtmlEasyPrinting(const wxString& name, wxFrame *parent_frame)
{
m_Frame = parent_frame;
m_Name = name;
m_PrintData = new wxPrintData;
#if (defined __WXGTK__) || (defined __WXMOTIF__)
(*m_PrintData) = (*wxThePrintSetupData);
#endif
m_PageSetupData = new wxPageSetupDialogData;
m_Headers[0] = m_Headers[1] = m_Footers[0] = m_Footers[1] = wxEmptyString;
m_PageSetupData -> EnableMargins(TRUE);
m_PageSetupData -> SetMarginTopLeft(wxPoint(25, 25));
m_PageSetupData -> SetMarginBottomRight(wxPoint(25, 25));
}
wxHtmlEasyPrinting::~wxHtmlEasyPrinting()
{
delete m_PrintData;
delete m_PageSetupData;
}
void wxHtmlEasyPrinting::PreviewFile(const wxString &htmlfile)
{
wxHtmlPrintout *p1 = CreatePrintout();
p1 -> SetHtmlFile(htmlfile);
wxHtmlPrintout *p2 = CreatePrintout();
p2 -> SetHtmlFile(htmlfile);
DoPreview(p1, p2);
}
void wxHtmlEasyPrinting::PreviewText(const wxString &htmltext, const wxString &basepath)
{
wxHtmlPrintout *p1 = CreatePrintout();
p1 -> SetHtmlText(htmltext, basepath, TRUE);
wxHtmlPrintout *p2 = CreatePrintout();
p2 -> SetHtmlText(htmltext, basepath, TRUE);
DoPreview(p1, p2);
}
void wxHtmlEasyPrinting::PrintFile(const wxString &htmlfile)
{
wxHtmlPrintout *p = CreatePrintout();
p -> SetHtmlFile(htmlfile);
DoPrint(p);
}
void wxHtmlEasyPrinting::PrintText(const wxString &htmltext, const wxString &basepath)
{
wxHtmlPrintout *p = CreatePrintout();
p -> SetHtmlText(htmltext, basepath, TRUE);
DoPrint(p);
}
void wxHtmlEasyPrinting::DoPreview(wxHtmlPrintout *printout1, wxHtmlPrintout *printout2)
{
// Pass two printout objects: for preview, and possible printing.
wxPrintDialogData printDialogData(*m_PrintData);
wxPrintPreview *preview = new wxPrintPreview(printout1, printout2, &printDialogData);
if (!preview -> Ok()) {
delete preview;
wxMessageBox(_("There was a problem previewing.\nPerhaps your current printer is not set correctly?"), _("Previewing"), wxOK);
}
else {
wxPreviewFrame *frame = new wxPreviewFrame(preview, m_Frame,
m_Name + _(" Preview"),
wxPoint(100, 100), wxSize(650, 500));
frame -> Centre(wxBOTH);
frame -> Initialize();
frame -> Show(TRUE);
}
}
void wxHtmlEasyPrinting::DoPrint(wxHtmlPrintout *printout)
{
wxPrintDialogData printDialogData(*m_PrintData);
wxPrinter printer(&printDialogData);
if (!printer.Print(m_Frame, printout, TRUE))
wxMessageBox(_("There was a problem printing.\nPerhaps your current printer is not set correctly?"), _("Printing"), wxOK);
else
(*m_PrintData) = printer.GetPrintDialogData().GetPrintData();
}
void wxHtmlEasyPrinting::PrinterSetup()
{
wxPrintDialogData printDialogData(*m_PrintData);
wxPrintDialog printerDialog(m_Frame, &printDialogData);
printerDialog.GetPrintDialogData().SetSetupDialog(TRUE);
if (printerDialog.ShowModal() == wxID_OK)
(*m_PrintData) = printerDialog.GetPrintDialogData().GetPrintData();
}
void wxHtmlEasyPrinting::PageSetup()
{
m_PageSetupData -> SetPrintData(*m_PrintData);
wxPageSetupDialog pageSetupDialog(m_Frame, m_PageSetupData);
if (pageSetupDialog.ShowModal() == wxID_OK) {
(*m_PrintData) = pageSetupDialog.GetPageSetupData().GetPrintData();
(*m_PageSetupData) = pageSetupDialog.GetPageSetupData();
}
}
void wxHtmlEasyPrinting::SetHeader(const wxString& header, int pg)
{
if (pg == wxPAGE_ALL || pg == wxPAGE_EVEN)
m_Headers[0] = header;
if (pg == wxPAGE_ALL || pg == wxPAGE_ODD)
m_Headers[1] = header;
}
void wxHtmlEasyPrinting::SetFooter(const wxString& footer, int pg)
{
if (pg == wxPAGE_ALL || pg == wxPAGE_EVEN)
m_Footers[0] = footer;
if (pg == wxPAGE_ALL || pg == wxPAGE_ODD)
m_Footers[1] = footer;
}
wxHtmlPrintout *wxHtmlEasyPrinting::CreatePrintout()
{
wxHtmlPrintout *p = new wxHtmlPrintout(m_Name);
p -> SetHeader(m_Headers[0], wxPAGE_EVEN);
p -> SetHeader(m_Headers[1], wxPAGE_ODD);
p -> SetFooter(m_Footers[0], wxPAGE_EVEN);
p -> SetFooter(m_Footers[1], wxPAGE_ODD);
p -> SetMargins(m_PageSetupData -> GetMarginTopLeft().y,
m_PageSetupData -> GetMarginBottomRight().y,
m_PageSetupData -> GetMarginTopLeft().x,
m_PageSetupData -> GetMarginBottomRight().x);
return p;
}
#endif // wxUSE_HTML & wxUSE_PRINTING_ARCHITECTURE
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