Fix drag and drop of files (Schplurtz le Déboulonné, LP#1311481) and some tweaks (Steve Boddy)

Schplurtz le Déboulonné
    - multiple files can be dropped in terminal
    - correctly sh-quote filenames, even those with '
    - also fixes LP#1311481 (\n after dropped filename)
Steve Boddy
    - changes to the logic, where all lines are now checked for the file:// prefix
    - text blocks now insert in full, not just first line

terminatorlib/terminal.py

@@ -1044,12 +1044,23 @@ class Terminal(gtk.VBox):
         dbg('drag data received of type: %s' % selection_data.type)
         if gtk.targets_include_text(drag_context.targets) or \
            gtk.targets_include_uri(drag_context.targets):
-            # copy text to destination
-            txt = selection_data.data.strip(' ')
-            if txt[0:7] == 'file://':
-                txt = "'%s'" % urllib.unquote(txt[7:])
-            else:
-                txt = txt.split('\n')[0]
+            # copy text with no modification yet to destination
+            txt = selection_data.data
+            txt_lines = txt.split( "\r\n" )
+            if txt_lines[-1] == '':
+                for line in txt_lines[:-1]:
+                    if line[0:7] != 'file://':
+                        break
+                else:
+                    # It is a list of crlf terminated file:// URL. let's
+                    # iterate over all elements except the last one.
+                    str=''
+                    for fname in txt_lines[:-1]:
+                        dbg('drag data fname: %s' % fname)
+                        fname = "'%s'" % urllib.unquote(fname[7:].replace("'",
+                                                                    '\'\\\'\''))
+                        str += fname + ' '
+                    txt=str
             for term in self.terminator.get_target_terms(self):
                 term.feed(txt)
             return