Add <span> tag and limited support for CSS styles to wxHTML.

Parse "style" attributes of the HTML tags and honour those of them that can be
mapped to the HTML 3 attributes.

Also add a handler for <span> tag.

Closes #10631.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@64443 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/html/styleparams.cpp

@@ -0,0 +1,78 @@
+/////////////////////////////////////////////////////////////////////////////
+// Name:        src/html/styleparams.cpp
+// Purpose:     wxHtml helper code for extracting style parameters
+// Author:      Nigel Paton
+// RCS-ID:      $Id$
+// Copyright:   wxWidgets team
+// Licence:     wxWindows licence
+/////////////////////////////////////////////////////////////////////////////
+
+#include "wx/wxprec.h"
+#include "wx/tokenzr.h"
+#include "wx/html/htmltag.h"
+#include "wx/html/styleparams.h"
+
+#ifdef __BORLANDC__
+    #pragma hdrstop
+#endif
+
+#if wxUSE_HTML
+
+wxHtmlStyleParams::wxHtmlStyleParams(const wxHtmlTag& tag)
+{
+    wxString wd = tag.GetParam(wxT("STYLE"));
+
+    // Make sure no whitespace
+    wd.Trim(true).Trim(false);
+    if ( wd.empty() )
+        return;
+
+    // Check for bracketed entries
+    // Only support element properties and not pseudo-element or pseudo-classes
+    if (wd.Find('{') == 0)
+    {
+        // Extract string up to end bracket
+        int endBracket = wd.Find('}');
+        if (endBracket != wxNOT_FOUND)
+        {
+            // Replace original string with bracketed options
+            wd = wd.SubString(1, endBracket - 1);
+            // Make sure no whitespace
+            wd.Trim(true).Trim(false);
+        }
+        else
+        {
+            // Syntax problem change to blank string
+            wd = "";
+        }
+    }
+
+    // Should now have a semi-colon delimited list of options
+    // Each option is a name and a value separated by a colon
+    // Split the list into names and values
+    wxStringTokenizer tkz(wd, wxT(";"), wxTOKEN_STRTOK);
+    while ( tkz.HasMoreTokens() )
+    {
+        wxString token = tkz.GetNextToken();
+        // Split into name and value
+        int colonIndex = token.Find(':');
+        if ((colonIndex != wxNOT_FOUND) && // Not a name value pair
+            (colonIndex != 0))             // No name
+        {
+            wxString tempString;
+            // Extract and trim name
+            tempString = token.SubString(0, colonIndex - 1);
+            tempString.Trim(true).Trim(false);
+            // Add to name list
+            m_names.Add(tempString);
+
+            // Extract and trim values
+            tempString = token.SubString(colonIndex + 1, token.Length() - 1);
+            tempString.Trim(true).Trim(false);
+            // Add to values list
+            m_values.Add(tempString);
+        }
+    }
+}
+
+#endif // wxUSE_HTML