X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/9695c53a923ae7f19df51f84fd69ca052acb4f8f..e83c4d401206ff9d5568f03ade6d9713c57bdd51:/src/html/htmprint.cpp diff --git a/src/html/htmprint.cpp b/src/html/htmprint.cpp index cacbefbc60..b91f4b1d08 100644 --- a/src/html/htmprint.cpp +++ b/src/html/htmprint.cpp @@ -24,6 +24,7 @@ #include "wx/settings.h" #include "wx/msgdlg.h" #include "wx/module.h" + #include "wx/sizer.h" #endif #include "wx/print.h" @@ -31,7 +32,34 @@ #include "wx/html/htmprint.h" #include "wx/wxhtml.h" #include "wx/wfstream.h" - +#include "wx/infobar.h" + + +// default font size of normal text (HTML font size 0) for printing, in points: +#define DEFAULT_PRINT_FONT_SIZE 12 + + +// CSS specification offer following guidance on dealing with pixel sizes +// when printing at +// http://www.w3.org/TR/2004/CR-CSS21-20040225/syndata.html#length-units: +// +// Pixel units are relative to the resolution of the viewing device, i.e., +// most often a computer display. If the pixel density of the output +// device is very different from that of a typical computer display, the +// user agent should rescale pixel values. It is recommended that the [ +// reference pixel] be the visual angle of one pixel on a device with a +// pixel density of 96dpi and a distance from the reader of an arm's +// length. For a nominal arm's length of 28 inches, the visual angle is +// therefore about 0.0213 degrees. +// +// For reading at arm's length, 1px thus corresponds to about 0.26 mm +// (1/96 inch). When printed on a laser printer, meant for reading at a +// little less than arm's length (55 cm, 21 inches), 1px is about 0.20 mm. +// On a 300 dots-per-inch (dpi) printer, that may be rounded up to 3 dots +// (0.25 mm); on a 600 dpi printer, it can be rounded to 5 dots. +// +// See also http://trac.wxwidgets.org/ticket/10942. +#define TYPICAL_SCREEN_DPI 96.0 //-------------------------------------------------------------------------------- // wxHtmlDCRenderer @@ -46,6 +74,7 @@ wxHtmlDCRenderer::wxHtmlDCRenderer() : wxObject() m_Parser = new wxHtmlWinParser(); m_FS = new wxFileSystem(); m_Parser->SetFS(m_FS); + SetStandardFonts(DEFAULT_PRINT_FONT_SIZE); } @@ -59,16 +88,19 @@ wxHtmlDCRenderer::~wxHtmlDCRenderer() -void wxHtmlDCRenderer::SetDC(wxDC *dc, double pixel_scale) +void wxHtmlDCRenderer::SetDC(wxDC *dc, double pixel_scale, double font_scale) { m_DC = dc; - m_Parser->SetDC(m_DC, pixel_scale); + m_Parser->SetDC(m_DC, pixel_scale, font_scale); } void wxHtmlDCRenderer::SetSize(int width, int height) { + wxCHECK_RET( width, "width must be non-zero" ); + wxCHECK_RET( height, "height must be non-zero" ); + m_Width = width; m_Height = height; } @@ -76,9 +108,10 @@ void wxHtmlDCRenderer::SetSize(int width, int height) void wxHtmlDCRenderer::SetHtmlText(const wxString& html, const wxString& basepath, bool isdir) { - if (m_DC == NULL) return; + wxCHECK_RET( m_DC, "SetDC() must be called before SetHtmlText()" ); + wxCHECK_RET( m_Width, "SetSize() must be called before SetHtmlText()" ); - if (m_Cells != NULL) delete m_Cells; + wxDELETE(m_Cells); m_FS->ChangePathTo(basepath, isdir); m_Cells = (wxHtmlContainerCell*) m_Parser->Parse(html); @@ -91,8 +124,10 @@ void wxHtmlDCRenderer::SetFonts(const wxString& normal_face, const wxString& fix const int *sizes) { m_Parser->SetFonts(normal_face, fixed_face, sizes); - if (m_DC == NULL && m_Cells != NULL) + + if ( m_Cells ) m_Cells->Layout(m_Width); + // else: SetHtmlText() not yet called, no need for relayout } void wxHtmlDCRenderer::SetStandardFonts(int size, @@ -100,20 +135,23 @@ void wxHtmlDCRenderer::SetStandardFonts(int size, const wxString& fixed_face) { m_Parser->SetStandardFonts(size, normal_face, fixed_face); - if (m_DC == NULL && m_Cells != NULL) + + if ( m_Cells ) m_Cells->Layout(m_Width); + // else: SetHtmlText() not yet called, no need for relayout } int wxHtmlDCRenderer::Render(int x, int y, wxArrayInt& known_pagebreaks, int from, int dont_render, int to) { - int pbreak, hght; + wxCHECK_MSG( m_Cells, 0, "SetHtmlText() must be called before Render()" ); + wxCHECK_MSG( m_DC, 0, "SetDC() must be called before Render()" ); - if (m_Cells == NULL || m_DC == NULL) return 0; + int pbreak, hght; pbreak = (int)(from + m_Height); - while (m_Cells->AdjustPagebreak(&pbreak, known_pagebreaks)) {} + while (m_Cells->AdjustPagebreak(&pbreak, known_pagebreaks, m_Height)) {} hght = pbreak - from; if(to < hght) hght = to; @@ -127,7 +165,7 @@ int wxHtmlDCRenderer::Render(int x, int y, m_DC->SetClippingRegion(x, y, m_Width, hght); m_Cells->Draw(*m_DC, x, (y - from), - y, pbreak + (y /*- from*/), + y, y + hght, rinfo); m_DC->DestroyClippingRegion(); } @@ -136,11 +174,14 @@ int wxHtmlDCRenderer::Render(int x, int y, else return GetTotalHeight(); } +int wxHtmlDCRenderer::GetTotalWidth() const +{ + return m_Cells ? m_Cells->GetWidth() : 0; +} -int wxHtmlDCRenderer::GetTotalHeight() +int wxHtmlDCRenderer::GetTotalHeight() const { - if (m_Cells) return m_Cells->GetHeight(); - else return 0; + return m_Cells ? m_Cells->GetHeight() : 0; } @@ -155,12 +196,13 @@ wxHtmlPrintout::wxHtmlPrintout(const wxString& title) : wxPrintout(title) { m_Renderer = new wxHtmlDCRenderer; m_RendererHdr = new wxHtmlDCRenderer; - m_NumPages = wxHTML_PRINT_MAX_PAGES; + m_NumPages = INT_MAX; 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 + SetStandardFonts(DEFAULT_PRINT_FONT_SIZE); } @@ -182,9 +224,77 @@ void wxHtmlPrintout::AddFilter(wxHtmlFilter *filter) m_Filters.Append(filter); } +bool +wxHtmlPrintout::CheckFit(const wxSize& pageArea, const wxSize& docArea) const +{ + // Nothing to do if the contents fits horizontally. + if ( docArea.x <= pageArea.x ) + return true; + + // Otherwise warn the user more or less intrusively depending on whether + // we're previewing or printing: + if ( wxPrintPreview * const preview = GetPreview() ) + { + // Don't annoy the user too much when previewing by using info bar + // instead of a dialog box. +#if wxUSE_INFOBAR + wxFrame * const parent = preview->GetFrame(); + wxCHECK_MSG( parent, false, "No parent preview frame?" ); + + wxSizer * const sizer = parent->GetSizer(); + wxCHECK_MSG( sizer, false, "Preview frame should be using sizers" ); + + wxInfoBar * const bar = new wxInfoBar(parent); + sizer->Add(bar, wxSizerFlags().Expand()); + + // Note that the message here is similar to the one below but not + // exactly the same, notably we don't use the document title here + // because it's already clear which document it pertains to and the + // title may be long enough to make the text not fit in the window. + bar->ShowMessage + ( + _("This document doesn't fit on the page horizontally and " + "will be truncated when it is printed."), + wxICON_WARNING + ); +#endif // wxUSE_INFOBAR + } + else // We're going to really print and not just preview. + { + // This is our last chance to warn the user that the output will be + // mangled so do show a message box. + wxMessageDialog + dlg + ( + NULL, + wxString::Format + ( + _("The document \"%s\" doesn't fit on the page " + "horizontally and will be truncated if printed.\n" + "\n" + "Would you like to proceed with printing it nevertheless?"), + GetTitle() + ), + _("Printing"), + wxOK | wxCANCEL | wxCANCEL_DEFAULT | wxICON_QUESTION + ); + dlg.SetExtendedMessage + ( + _("If possible, try changing the layout parameters to " + "make the printout more narrow.") + ); + dlg.SetOKLabel(wxID_PRINT); + + if ( dlg.ShowModal() == wxID_CANCEL ) + return false; + } + + return true; +} + void wxHtmlPrintout::OnPreparePrinting() { - int pageWidth, pageHeight, mm_w, mm_h, scr_w, scr_h, dc_w, dc_h; + int pageWidth, pageHeight, mm_w, mm_h, dc_w, dc_h; float ppmm_h, ppmm_v; GetPageSizePixels(&pageWidth, &pageHeight); @@ -194,17 +304,21 @@ void wxHtmlPrintout::OnPreparePrinting() int ppiPrinterX, ppiPrinterY; GetPPIPrinter(&ppiPrinterX, &ppiPrinterY); + wxUnusedVar(ppiPrinterX); int ppiScreenX, ppiScreenY; GetPPIScreen(&ppiScreenX, &ppiScreenY); + wxUnusedVar(ppiScreenX); - wxDisplaySize(&scr_w, &scr_h); GetDC()->GetSize(&dc_w, &dc_h); - GetDC()->SetUserScale((double)dc_w / (double)pageWidth, (double)dc_w / (double)pageWidth); + GetDC()->SetUserScale((double)dc_w / (double)pageWidth, + (double)dc_h / (double)pageHeight); /* prepare headers/footers renderer: */ - m_RendererHdr->SetDC(GetDC(), (double)ppiPrinterY / (double)ppiScreenY); + m_RendererHdr->SetDC(GetDC(), + (double)ppiPrinterY / TYPICAL_SCREEN_DPI, + (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) @@ -229,15 +343,30 @@ void wxHtmlPrintout::OnPreparePrinting() } /* 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->SetDC(GetDC(), + (double)ppiPrinterY / TYPICAL_SCREEN_DPI, + (double)ppiPrinterY / (double)ppiScreenY); + + const int printAreaW = int(ppmm_h * (mm_w - m_MarginLeft - m_MarginRight)); + int printAreaH = int(ppmm_v * (mm_h - m_MarginTop - m_MarginBottom)); + if ( m_HeaderHeight ) + printAreaH -= int(m_HeaderHeight + m_MarginSpace * ppmm_v); + if ( m_FooterHeight ) + printAreaH -= int(m_FooterHeight + m_MarginSpace * ppmm_v); + + m_Renderer->SetSize(printAreaW, printAreaH); m_Renderer->SetHtmlText(m_Document, m_BasePath, m_BasePathIsDir); - CountPages(); + + if ( CheckFit(wxSize(printAreaW, printAreaH), + wxSize(m_Renderer->GetTotalWidth(), + m_Renderer->GetTotalHeight())) || IsPreview() ) + { + // do paginate the document + CountPages(); + } + //else: if we don't call CountPages() m_PageBreaks remains empty and our + // GetPageInfo() will return 0 as max page and so nothing will be + // printed } bool wxHtmlPrintout::OnBeginDocument(int startPage, int endPage) @@ -363,7 +492,6 @@ void wxHtmlPrintout::CountPages() int pos = 0; m_NumPages = 0; - // m_PageBreaks[0] = 0; m_PageBreaks.Clear(); m_PageBreaks.Add( 0); @@ -374,12 +502,6 @@ void wxHtmlPrintout::CountPages() m_PageBreaks, pos, true, INT_MAX); m_PageBreaks.Add( pos); - if( m_PageBreaks.GetCount() > wxHTML_PRINT_MAX_PAGES) - { - wxMessageBox( _("HTML pagination algorithm generated more than the allowed maximum number of pages and it can't continue any longer!"), - _("Warning"), wxCANCEL | wxICON_ERROR ); - break; - } } while (pos < m_Renderer->GetTotalHeight()); } @@ -389,14 +511,13 @@ void wxHtmlPrintout::RenderPage(wxDC *dc, int page) { wxBusyCursor wait; - int pageWidth, pageHeight, mm_w, mm_h, scr_w, scr_h, dc_w, dc_h; + int pageWidth, pageHeight, mm_w, mm_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; - wxDisplaySize(&scr_w, &scr_h); dc->GetSize(&dc_w, &dc_h); int ppiPrinterX, ppiPrinterY; @@ -406,18 +527,23 @@ void wxHtmlPrintout::RenderPage(wxDC *dc, int page) GetPPIScreen(&ppiScreenX, &ppiScreenY); wxUnusedVar(ppiScreenX); - dc->SetUserScale((double)dc_w / (double)pageWidth, (double)dc_w / (double)pageWidth); + dc->SetUserScale((double)dc_w / (double)pageWidth, + (double)dc_h / (double)pageHeight); - m_Renderer->SetDC(dc, (double)ppiPrinterY / (double)ppiScreenY); + m_Renderer->SetDC(dc, + (double)ppiPrinterY / TYPICAL_SCREEN_DPI, + (double)ppiPrinterY / (double)ppiScreenY); - dc->SetBackgroundMode(wxTRANSPARENT); + dc->SetBackgroundMode(wxBRUSHSTYLE_TRANSPARENT); m_Renderer->Render((int) (ppmm_h * m_MarginLeft), (int) (ppmm_v * (m_MarginTop + (m_HeaderHeight == 0 ? 0 : m_MarginSpace)) + m_HeaderHeight), m_PageBreaks, m_PageBreaks[page-1], false, m_PageBreaks[page]-m_PageBreaks[page-1]); - m_RendererHdr->SetDC(dc, (double)ppiPrinterY / (double)ppiScreenY); + m_RendererHdr->SetDC(dc, + (double)ppiPrinterY / TYPICAL_SCREEN_DPI, + (double)ppiPrinterY / (double)ppiScreenY); if (m_Headers[page % 2] != wxEmptyString) { m_RendererHdr->SetHtmlText(TranslateHeader(m_Headers[page % 2], page)); @@ -500,7 +626,7 @@ wxHtmlEasyPrinting::wxHtmlEasyPrinting(const wxString& name, wxWindow *parentWin m_PageSetupData->SetMarginTopLeft(wxPoint(25, 25)); m_PageSetupData->SetMarginBottomRight(wxPoint(25, 25)); - SetFonts(wxEmptyString, wxEmptyString, NULL); + SetStandardFonts(DEFAULT_PRINT_FONT_SIZE); } @@ -569,7 +695,7 @@ bool wxHtmlEasyPrinting::DoPreview(wxHtmlPrintout *printout1, wxHtmlPrintout *pr // Pass two printout objects: for preview, and possible printing. wxPrintDialogData printDialogData(*GetPrintData()); wxPrintPreview *preview = new wxPrintPreview(printout1, printout2, &printDialogData); - if (!preview->Ok()) + if (!preview->IsOk()) { delete preview; return false; @@ -605,7 +731,7 @@ bool wxHtmlEasyPrinting::DoPrint(wxHtmlPrintout *printout) void wxHtmlEasyPrinting::PageSetup() { - if (!GetPrintData()->Ok()) + if (!GetPrintData()->IsOk()) { wxLogError(_("There was a problem during page setup: you may need to set a default printer.")); return;