Add new wxCommandLinkButton class.

[wxWidgets.git] / src / html / htmprint.cpp

diff --git a/src/html/htmprint.cpp b/src/html/htmprint.cpp
index 158483e3a99481c77800505803fa7058fa0a27e7..4ce2e3b80a5416175b709ac3c17eea0c62bdc1dc 100644 (file)
--- 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/settings.h"
     #include "wx/msgdlg.h"
     #include "wx/module.h"

+    #include "wx/sizer.h"

 #endif
 
 #include "wx/print.h"
 #endif
 
 #include "wx/print.h"


@@ -31,12 +32,35 @@
 #include "wx/html/htmprint.h"
 #include "wx/wxhtml.h"
 #include "wx/wfstream.h"
 #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
 
 
 
 
 // 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
 //--------------------------------------------------------------------------------
 //--------------------------------------------------------------------------------
 // wxHtmlDCRenderer
 //--------------------------------------------------------------------------------


@@ -64,16 +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_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)
 {
 }
 
 
 
 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;
 }
     m_Width = width;
     m_Height = height;
 }


@@ -81,9 +108,10 @@ void wxHtmlDCRenderer::SetSize(int width, int height)
 
 void wxHtmlDCRenderer::SetHtmlText(const wxString& html, const wxString& basepath, bool isdir)
 {
 
 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);
 
     m_FS->ChangePathTo(basepath, isdir);
     m_Cells = (wxHtmlContainerCell*) m_Parser->Parse(html);


@@ -96,8 +124,10 @@ void wxHtmlDCRenderer::SetFonts(const wxString& normal_face, const wxString& fix
                                 const int *sizes)
 {
     m_Parser->SetFonts(normal_face, fixed_face, sizes);
                                 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);
         m_Cells->Layout(m_Width);

+    // else: SetHtmlText() not yet called, no need for relayout

 }
 
 void wxHtmlDCRenderer::SetStandardFonts(int size,
 }
 
 void wxHtmlDCRenderer::SetStandardFonts(int size,


@@ -105,17 +135,20 @@ void wxHtmlDCRenderer::SetStandardFonts(int size,
                                         const wxString& fixed_face)
 {
     m_Parser->SetStandardFonts(size, normal_face, fixed_face);
                                         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);
         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 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)) {}
 
     pbreak = (int)(from + m_Height);
     while (m_Cells->AdjustPagebreak(&pbreak, known_pagebreaks)) {}


@@ -132,7 +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),
         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();
     }
                       rinfo);
         m_DC->DestroyClippingRegion();
     }


@@ -141,11 +174,14 @@ int wxHtmlDCRenderer::Render(int x, int y,
     else return GetTotalHeight();
 }
 
     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;

 }
 
 
 }
 
 


@@ -160,7 +196,7 @@ wxHtmlPrintout::wxHtmlPrintout(const wxString& title) : wxPrintout(title)
 {
     m_Renderer = new wxHtmlDCRenderer;
     m_RendererHdr = new wxHtmlDCRenderer;
 {
     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_Document = m_BasePath = wxEmptyString; m_BasePathIsDir = true;
     m_Headers[0] = m_Headers[1] = wxEmptyString;
     m_Footers[0] = m_Footers[1] = wxEmptyString;


@@ -188,9 +224,77 @@ void wxHtmlPrintout::AddFilter(wxHtmlFilter *filter)
     m_Filters.Append(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()
 {
 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);
     float ppmm_h, ppmm_v;
 
     GetPageSizePixels(&pageWidth, &pageHeight);


@@ -200,10 +304,11 @@ void wxHtmlPrintout::OnPreparePrinting()
 
     int ppiPrinterX, ppiPrinterY;
     GetPPIPrinter(&ppiPrinterX, &ppiPrinterY);
 
     int ppiPrinterX, ppiPrinterY;
     GetPPIPrinter(&ppiPrinterX, &ppiPrinterY);

+    wxUnusedVar(ppiPrinterX);

     int ppiScreenX, ppiScreenY;
     GetPPIScreen(&ppiScreenX, &ppiScreenY);
     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,
     GetDC()->GetSize(&dc_w, &dc_h);
 
     GetDC()->SetUserScale((double)dc_w / (double)pageWidth,


@@ -211,7 +316,9 @@ void wxHtmlPrintout::OnPreparePrinting()
 
     /* prepare headers/footers renderer: */
 
 
     /* 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)
     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)


@@ -236,15 +343,30 @@ void wxHtmlPrintout::OnPreparePrinting()
     }
 
     /* prepare main renderer: */
     }
 
     /* 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);
     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)
 }
 
 bool wxHtmlPrintout::OnBeginDocument(int startPage, int endPage)


@@ -370,7 +492,6 @@ void wxHtmlPrintout::CountPages()
 
     int pos = 0;
     m_NumPages = 0;
 
     int pos = 0;
     m_NumPages = 0;

-    // m_PageBreaks[0] = 0;

 
     m_PageBreaks.Clear();
     m_PageBreaks.Add( 0);
 
     m_PageBreaks.Clear();
     m_PageBreaks.Add( 0);


@@ -381,12 +502,6 @@ void wxHtmlPrintout::CountPages()
                                  m_PageBreaks,
                                  pos, true, INT_MAX);
         m_PageBreaks.Add( pos);
                                  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());
 }
 
     } while (pos < m_Renderer->GetTotalHeight());
 }
 


@@ -396,14 +511,13 @@ void wxHtmlPrintout::RenderPage(wxDC *dc, int page)
 {
     wxBusyCursor wait;
 
 {
     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;
     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;
     dc->GetSize(&dc_w, &dc_h);
 
     int ppiPrinterX, ppiPrinterY;


@@ -416,7 +530,9 @@ void wxHtmlPrintout::RenderPage(wxDC *dc, int page)
     dc->SetUserScale((double)dc_w / (double)pageWidth,
                      (double)dc_h / (double)pageHeight);
 
     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(wxBRUSHSTYLE_TRANSPARENT);
 
 
     dc->SetBackgroundMode(wxBRUSHSTYLE_TRANSPARENT);
 


@@ -425,7 +541,9 @@ void wxHtmlPrintout::RenderPage(wxDC *dc, int page)
                          m_PageBreaks[page-1], false, m_PageBreaks[page]-m_PageBreaks[page-1]);
 
 
                          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));
     if (m_Headers[page % 2] != wxEmptyString)
     {
         m_RendererHdr->SetHtmlText(TranslateHeader(m_Headers[page % 2], page));