fixed wxHtmlWindow::SelectionToText() to correctly insert newlines after single-cell paragraphs

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_8_BRANCH@56333 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

docs/changes.txt

@@ -99,6 +99,8 @@ All (GUI):
 
 - Fixed wxHTML's pagebreaks computation in tables (D.J.Stauffer).
 - Fixed wxRichTextCtrl input that uses Alt on Mac OS X, for example Polish Pro input.
+- Fixed wxHtmlWindow::SelectionToText() to correctly insert newlines after
+  single-cell paragraphs.
 
 All (Unix):
 

src/html/htmlwin.cpp

@@ -881,21 +881,27 @@ wxString wxHtmlWindow::DoSelectionToText(wxHtmlSelection *sel)
         return wxEmptyString;
 
     wxClientDC dc(this);
-
-    const wxHtmlCell *end = sel->GetToCell();
     wxString text;
-    wxHtmlTerminalCellsInterator i(sel->GetFromCell(), end);
-    if ( i )
-    {
-        text << i->ConvertToText(sel);
-        ++i;
-    }
-    const wxHtmlCell *prev = *i;
+
+    wxHtmlTerminalCellsInterator i(sel->GetFromCell(), sel->GetToCell());
+    const wxHtmlCell *prev = NULL;
+
     while ( i )
     {
-        if ( prev->GetParent() != i->GetParent() )
-            text << _T('\n');
-        text << i->ConvertToText(*i == end ? sel : NULL);
+        // When converting HTML content to plain text, the entire paragraph
+        // (container in wxHTML) goes on single line. A new paragraph (that
+        // should go on its own line) has its own container. Therefore, the
+        // simplest way of detecting where to insert newlines in plain text
+        // is to check if the parent container changed -- if it did, we moved
+        // to a new paragraph.
+        if ( prev && prev->GetParent() != i->GetParent() )
+            text << wxT('\n');
+
+        // NB: we don't need to pass the selection to ConvertToText() in the
+        //     middle of the selected text; it's only useful when only part of
+        //     a cell is selected
+        text << i->ConvertToText(sel);
+
         prev = *i;
         ++i;
     }