better variant support, fixes #11114

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

diff --git a/src/html/htmprint.cpp b/src/html/htmprint.cpp
index 80277e0336a00b95be043087e04af43aca9a524c..6a22f88547216fb3bff807a225a50a233c5126e9 100644 (file)
--- a/src/html/htmprint.cpp
+++ b/src/html/htmprint.cpp
@@ -74,6 +74,9 @@ void wxHtmlDCRenderer::SetDC(wxDC *dc, double pixel_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;
 }
@@ -81,9 +84,10 @@ 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);
@@ -96,8 +100,10 @@ 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,
@@ -105,17 +111,20 @@ 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)) {}
@@ -141,11 +150,14 @@ 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;
 }
 
 
@@ -188,6 +200,40 @@ void wxHtmlPrintout::AddFilter(wxHtmlFilter *filter)
     m_Filters.Append(filter);
 }
 
+bool
+wxHtmlPrintout::CheckFit(const wxSize& pageArea, const wxSize& docArea) const
+{
+    if ( docArea.x > pageArea.x )
+    {
+        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;
@@ -239,14 +285,27 @@ 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)
-                          ));
+
+    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())) )
+    {
+        // 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)