htmprint.cpp

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/////////////////////////////////////////////////////////////////////////////
// Name:        htmprint.cpp
// Purpose:     html printing classes
// Author:      Vaclav Slavik
// Created:     25/09/99
// RCS-ID:      $Id: htmprint.cpp,v 1.49 2004/11/27 22:40:05 VS Exp $
// Copyright:   (c) Vaclav Slavik, 1999
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////


#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
#pragma implementation "htmprint.h"
#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/log.h"
    #include "wx/intl.h"
    #include "wx/dc.h"
#endif

#if wxUSE_HTML && wxUSE_PRINTING_ARCHITECTURE && wxUSE_STREAMS

#include "wx/dc.h"
#include "wx/print.h"
#include "wx/printdlg.h"
#include "wx/html/htmprint.h"
#include "wx/wxhtml.h"
#include "wx/wfstream.h"
#include "wx/module.h"
#include "wx/settings.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);
}



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, double pixel_scale)
{
    m_DC = dc;
    m_Parser->SetDC(m_DC, pixel_scale);
}



void wxHtmlDCRenderer::SetSize(int width, int height)
{
    m_Width = width;
    m_Height = height;
}


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_Cells = (wxHtmlContainerCell*) m_Parser->Parse(html);
    m_Cells->SetIndent(0, wxHTML_INDENT_ALL, wxHTML_UNITS_PIXELS);
    m_Cells->Layout(m_Width);
}


void wxHtmlDCRenderer::SetFonts(wxString normal_face, wxString fixed_face,
                                const int *sizes)
{
    m_Parser->SetFonts(normal_face, fixed_face, sizes);
    if (m_DC == NULL && m_Cells != NULL)
        m_Cells->Layout(m_Width);
}

void wxHtmlDCRenderer::SetStandardFonts(int size,
                                        const wxString& normal_face,
                                        const wxString& fixed_face)
{
    m_Parser->SetStandardFonts(size, normal_face, fixed_face);
    if (m_DC == NULL && m_Cells != NULL)
        m_Cells->Layout(m_Width);
}


int wxHtmlDCRenderer::Render(int x, int y, int from, int dont_render,
                             int maxHeight,
                             int *known_pagebreaks, int number_of_pages)
{
    int pbreak, hght;

    if (m_Cells == NULL || m_DC == NULL) return 0;

    pbreak = (int)(from + m_Height);
    while (m_Cells->AdjustPagebreak(&pbreak, known_pagebreaks, number_of_pages)) {}
    hght = pbreak - from;
    if (maxHeight < hght)
        hght = maxHeight;

    if (!dont_render)
    {
        wxHtmlRenderingInfo rinfo;
        wxDefaultHtmlRenderingStyle rstyle;
        rinfo.SetStyle(&rstyle);
        m_DC->SetBrush(*wxWHITE_BRUSH);
        m_DC->SetClippingRegion(x, y, m_Width, hght);
        m_Cells->Draw(*m_DC,
                      x, (y - from),
                      y, pbreak + (y /*- from*/),
                      rinfo);
        m_DC->DestroyClippingRegion();
    }

    if (pbreak < m_Cells->GetHeight()) return pbreak;
    else return GetTotalHeight();
}



int wxHtmlDCRenderer::GetTotalHeight()
{
    if (m_Cells) return m_Cells->GetHeight();
    else return 0;
}


//--------------------------------------------------------------------------------
// wxHtmlPrintout
//--------------------------------------------------------------------------------


wxList wxHtmlPrintout::m_Filters;

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;
}

void wxHtmlPrintout::CleanUpStatics()
{
    WX_CLEAR_LIST(wxList, m_Filters);
}

// Adds input filter
void wxHtmlPrintout::AddFilter(wxHtmlFilter *filter)
{
    m_Filters.Append(filter);
}

void wxHtmlPrintout::OnPreparePrinting()
{
    int pageWidth, pageHeight, mm_w, mm_h, scr_w, scr_h, dc_w, dc_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 ppiPrinterX, ppiPrinterY;
    GetPPIPrinter(&ppiPrinterX, &ppiPrinterY);
    int ppiScreenX, ppiScreenY;
    GetPPIScreen(&ppiScreenX, &ppiScreenY);

    wxDisplaySize(&scr_w, &scr_h);
    GetDC()->GetSize(&dc_w, &dc_h);

    GetDC()->SetUserScale((double)dc_w / (double)pageWidth, (double)dc_w / (double)pageWidth);

    /* prepare headers/footers renderer: */

    m_RendererHdr->SetDC(GetDC(), (double)ppiPrinterY / (double)ppiScreenY);
    m_RendererHdr->SetSize((int) (ppmm_h * (mm_w - m_MarginLeft - m_MarginRight)),
                          (int) (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(), (double)ppiPrinterY / (double)ppiScreenY);
    m_Renderer->SetSize((int) (ppmm_h * (mm_w - m_MarginLeft - m_MarginRight)),
                          (int) (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();
}

bool wxHtmlPrintout::OnBeginDocument(int startPage, int endPage)
{
    if (!wxPrintout::OnBeginDocument(startPage, endPage)) return false;

    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 = m_NumPages;
    *selPageFrom = 1;
    *selPageTo = m_NumPages;
}



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;

    if (wxFileExists(htmlfile))
        ff = fs.OpenFile(wxFileSystem::FileNameToURL(htmlfile));
    else
        ff = fs.OpenFile(htmlfile);

    if (ff == NULL)
    {
        wxLogError(htmlfile + _(": file does not exist!"));
        return;
    }

    bool done = false;
    wxHtmlFilterHTML defaultFilter;
    wxString doc;

    wxList::compatibility_iterator node = m_Filters.GetFirst();
    while (node)
    {
        wxHtmlFilter *h = (wxHtmlFilter*) node->GetData();
        if (h->CanRead(*ff))
        {
            doc = h->ReadFile(*ff);
            done = true;
            break;
        }
        node = node->GetNext();
    }

    if (!done)
        doc = defaultFilter.ReadFile(*ff);

    SetHtmlText(doc, htmlfile, false);
    delete ff;
}



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;
}