improve latex detection by looking only in latest message. Fixes #49

2 files changed, 40 insertions, 15 deletions

diff --git a/latex/latex.py b/latex/latex.py
index 10fbfa9..d5ed3ff 100644
--- a/latex/latex.py
+++ b/latex/latex.py
@@ -293,6 +293,8 @@ class LatexPlugin(GajimPlugin):
                 self.disconnect_from_chat_control_base)
         }
         self.test_activatable()
+        self.timeout_id = None
+        self.last_eol_offset = -1
 
     def test_activatable(self):
         """
@@ -360,24 +362,47 @@ class LatexPlugin(GajimPlugin):
         """
         called when conversation text widget changes
         """
-        def split_list(list):
+        def split_list(list_):
             newlist = []
-            for i in range(0, len(list)-1, 2):
-                newlist.append( [ list[i], list[i+1], ] )
+            for i in range(0, len(list_)-1, 2):
+                newlist.append( [ list_[i], list_[i+1], ] )
             return newlist
 
-        assert isinstance(tb, Gtk.TextBuffer)
-        start_iter = tb.get_start_iter()
-        points = []
-        tuple_found = start_iter.forward_search('$$',
-            Gtk.TextSearchFlags.TEXT_ONLY, None)
-        while tuple_found != None:
-            points.append(tuple_found)
-            tuple_found = tuple_found[1].forward_search('$$',
+        def detect_tags(tb, start_it=None, end_it=None):
+            self.timeout_id = None 
+            if not end_it: 
+                end_it = tb.get_end_iter() 
+            if not start_it: 
+                eol_tag = tb.get_tag_table().lookup('eol') 
+                start_it = end_it.copy() 
+                start_it.backward_to_tag_toggle(eol_tag)
+            points = []
+            tuple_found = start_it.forward_search('$$',
                 Gtk.TextSearchFlags.TEXT_ONLY, None)
-
-        for pair in split_list(points):
-            tb.apply_tag_by_name('latex', pair[0][1], pair[1][0])
+            while tuple_found != None:
+                points.append(tuple_found)
+                tuple_found = tuple_found[1].forward_search('$$',
+                    Gtk.TextSearchFlags.TEXT_ONLY, None)
+
+            for pair in split_list(points):
+                tb.apply_tag_by_name('latex', pair[0][1], pair[1][0])
+
+        end_iter = tb.get_end_iter()
+        eol_tag = tb.get_tag_table().lookup('eol')
+        it = end_iter.copy()
+        it.backward_to_tag_toggle(eol_tag)
+        if it.get_offset() == self.last_eol_offset:
+            if self.timeout_id:
+                GObject.source_remove(self.timeout_id)
+            self.timeout_id = Geobject.timeout_add(100, detect_tags, traceback, it, end_iter)
+        else:
+            if self.timeout_id: 
+                GObject.source_remove(self.timeout_id) 
+                it1 = it.copy() 
+                it1.backward_char() 
+                it1.backward_to_tag_toggle(eol_tag) 
+                detect_tags(traceback, it1, it) 
+            self.last_eol_offset = it.get_offset()
 
     def connect_with_chat_control_base(self, chat_control):
         d = {}
diff --git a/latex/manifest.ini b/latex/manifest.ini
index 88b1e94..e71ebdf 100644
--- a/latex/manifest.ini
+++ b/latex/manifest.ini
@@ -1,7 +1,7 @@
 [info]
 name: Latex
 short_name: latex
-version: 0.3
+version: 0.3.1
 description: render received latex code
 authors: Yves Fischer <yvesf@xapek.org>
  Yann Leboulanger <asterix@lagaule.org>