Add support for background-color style to span element in wxHTML.

Add code for setting/restoring background mode and use it to implement support
for changing the text background colour.

Closes #14443.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@72589 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/html/htmlcell.cpp

@@ -504,10 +504,12 @@ static void SwitchSelState(wxDC& dc, wxHtmlRenderingInfo& info,
     }
     else
     {
-        dc.SetBackgroundMode(wxBRUSHSTYLE_TRANSPARENT);
+        const int mode = info.GetState().GetBgMode();
+        dc.SetBackgroundMode(mode);
         dc.SetTextForeground(fg);
         dc.SetTextBackground(bg);
-        dc.SetBackground(wxBrush(bg, wxBRUSHSTYLE_SOLID));
+        if ( mode != wxTRANSPARENT )
+            dc.SetBackground(wxBrush(bg, mode));
     }
 }
 
@@ -572,16 +574,7 @@ void wxHtmlWordCell::Draw(wxDC& dc, int x, int y,
     {
         wxHtmlSelectionState selstate = info.GetState().GetSelectionState();
         // Not changing selection state, draw the word in single mode:
-        if ( selstate != wxHTML_SEL_OUT &&
-             dc.GetBackgroundMode() != wxBRUSHSTYLE_SOLID )
-        {
-            SwitchSelState(dc, info, true);
-        }
-        else if ( selstate == wxHTML_SEL_OUT &&
-                  dc.GetBackgroundMode() == wxBRUSHSTYLE_SOLID )
-        {
-            SwitchSelState(dc, info, false);
-        }
+        SwitchSelState(dc, info, selstate != wxHTML_SEL_OUT);
         dc.DrawText(m_Word, x + m_PosX, y + m_PosY);
         drawSelectionAfterCell = (selstate != wxHTML_SEL_OUT);
     }
@@ -1552,17 +1545,23 @@ void wxHtmlColourCell::DrawInvisible(wxDC& dc,
     if (m_Flags & wxHTML_CLR_BACKGROUND)
     {
         state.SetBgColour(m_Colour);
-        if (state.GetSelectionState() != wxHTML_SEL_IN)
-        {
-            dc.SetTextBackground(m_Colour);
-            dc.SetBackground(wxBrush(m_Colour, wxBRUSHSTYLE_SOLID));
-        }
-        else
-        {
-            wxColour c = info.GetStyle().GetSelectedTextBgColour(m_Colour);
-            dc.SetTextBackground(c);
-            dc.SetBackground(wxBrush(c, wxBRUSHSTYLE_SOLID));
-        }
+        state.SetBgMode(wxSOLID);
+        const wxColour c = state.GetSelectionState() == wxHTML_SEL_IN
+                         ? info.GetStyle().GetSelectedTextBgColour(m_Colour)
+                         : m_Colour;
+        dc.SetTextBackground(c);
+        dc.SetBackground(c);
+        dc.SetBackgroundMode(wxSOLID);
+    }
+    if (m_Flags & wxHTML_CLR_TRANSPARENT_BACKGROUND)
+    {
+        state.SetBgColour(m_Colour);
+        state.SetBgMode(wxTRANSPARENT);
+        const wxColour c = state.GetSelectionState() == wxHTML_SEL_IN
+                         ? info.GetStyle().GetSelectedTextBgColour(m_Colour)
+                         : m_Colour;
+        dc.SetTextBackground(c);
+        dc.SetBackgroundMode(wxTRANSPARENT);
     }
 }
 

src/html/m_span.cpp

@@ -34,6 +34,8 @@ TAG_HANDLER_BEGIN(SPAN, "SPAN" )
     TAG_HANDLER_PROC(tag)
     {
         wxColour oldclr = m_WParser->GetActualColor();
+        wxColour oldbackclr = m_WParser->GetActualBackgroundColor();
+        int oldbackmode = m_WParser->GetActualBackgroundMode();
         int oldsize = m_WParser->GetFontSize();
         int oldbold = m_WParser->GetFontBold();
         int olditalic = m_WParser->GetFontItalic();
@@ -56,6 +58,18 @@ TAG_HANDLER_BEGIN(SPAN, "SPAN" )
             }
         }
 
+        str = styleParams.GetParam(wxS("background-color"));
+        if ( !str.empty() )
+        {
+            wxColour clr;
+            if ( wxHtmlTag::ParseAsColour(str, &clr) )
+            {
+                m_WParser->SetActualBackgroundColor(clr);
+                m_WParser->SetActualBackgroundMode(wxBRUSHSTYLE_SOLID);
+                m_WParser->GetContainer()->InsertCell(new wxHtmlColourCell(clr, wxHTML_CLR_BACKGROUND));
+            }
+        }
+
         str = styleParams.GetParam(wxS("font-size"));
         if ( !str.empty() )
         {
@@ -151,6 +165,15 @@ TAG_HANDLER_BEGIN(SPAN, "SPAN" )
                 new wxHtmlColourCell(oldclr));
         }
 
+        if (oldbackmode != m_WParser->GetActualBackgroundMode() ||
+            oldbackclr != m_WParser->GetActualBackgroundColor())
+        {
+            m_WParser->SetActualBackgroundMode(oldbackmode);
+            m_WParser->SetActualBackgroundColor(oldbackclr);
+            m_WParser->GetContainer()->InsertCell(
+                new wxHtmlColourCell(oldbackclr, oldbackmode == wxBRUSHSTYLE_TRANSPARENT ? wxHTML_CLR_TRANSPARENT_BACKGROUND : wxHTML_CLR_BACKGROUND));
+        }
+
         return true;
     }
 

src/html/winpars.cpp

@@ -214,6 +214,11 @@ void wxHtmlWinParser::InitParser(const wxString& source)
     m_Link = wxHtmlLinkInfo( wxEmptyString );
     m_LinkColor.Set(0, 0, 0xFF);
     m_ActualColor.Set(0, 0, 0);
+    const wxColour windowColour = wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW) ;
+    m_ActualBackgroundColor = m_windowInterface
+                            ? m_windowInterface->GetHTMLBackgroundColour()
+                            : windowColour;
+    m_ActualBackgroundMode = wxBRUSHSTYLE_TRANSPARENT;
     m_Align = wxHTML_ALIGN_LEFT;
     m_ScriptMode = wxHTML_SCRIPT_NORMAL;
     m_ScriptBaseline = 0;
@@ -238,16 +243,13 @@ void wxHtmlWinParser::InitParser(const wxString& source)
 #endif
 
     m_Container->InsertCell(new wxHtmlColourCell(m_ActualColor));
-    wxColour windowColour = wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW) ;
 
     m_Container->InsertCell
                  (
                    new wxHtmlColourCell
                        (
-                         m_windowInterface
-                            ? m_windowInterface->GetHTMLBackgroundColour()
-                            : windowColour,
-                         wxHTML_CLR_BACKGROUND
+                         m_ActualBackgroundColor,
+                         m_ActualBackgroundMode == wxBRUSHSTYLE_TRANSPARENT ? wxHTML_CLR_TRANSPARENT_BACKGROUND : wxHTML_CLR_BACKGROUND
                        )
                   );