From f932df138aa7847c95f56e3994e5b939df01429f Mon Sep 17 00:00:00 2001
From: Qua-non <akshayaurora@gmail.com>
Date: Fri, 9 Mar 2012 20:33:37 +0530
Subject: [PATCH] Replace invalid values with sane ones for color and bb codes
 in color-parser and markup respectively to allow for dynamic input.

---
 kivy/core/text/markup.py |  7 +++++--
 kivy/parser.py           | 27 ++++++++++++++++++++++++---
 2 files changed, 29 insertions(+), 5 deletions(-)

diff --git a/kivy/core/text/markup.py b/kivy/core/text/markup.py
index 4d2e586a1..680fe6ef4 100644
--- a/kivy/core/text/markup.py
+++ b/kivy/core/text/markup.py
@@ -93,7 +93,7 @@ class MarkupLabel(MarkupLabelBase):
         self._style_stack[k].append(self.options[k])
 
     def _pop_style(self, k):
-        if len(self._style_stack[k]) == 0:
+        if k not in self._style_stack or len(self._style_stack[k]) == 0:
             Logger.warning('Label: pop style stack without push')
             return
         v = self._style_stack[k].pop()
@@ -135,7 +135,10 @@ class MarkupLabel(MarkupLabelBase):
                 spop('italic')
                 self.resolve_font_name()
             elif item[:6] == '[size=':
-                size = int(item[6:-1])
+                try:
+                    size = int(item[6:-1])
+                except ValueError:
+                    size = options['font_size']
                 spush('font_size')
                 options['font_size'] = size
             elif item == '[/size]':
diff --git a/kivy/parser.py b/kivy/parser.py
index 24b3a6726..1c645958b 100644
--- a/kivy/parser.py
+++ b/kivy/parser.py
@@ -29,6 +29,12 @@ def parse_filename(filename):
     return result or filename
 
 
+def color_error(text):
+    #show warning and return a sane value
+    Logger.warning(text)
+    return (0, 0, 0, 1)
+
+
 def parse_color(text):
     '''Parse a string to a kivy color. Supported formats :
         * rgb(r, g, b)
@@ -41,7 +47,18 @@ def parse_color(text):
     value = [1, 1, 1, 1]
     if text.startswith('rgb'):
         res = re.match('rgba?\((.*)\)', text)
-        value = [int(x) / 255. for x in re.split(',\ ?', res.groups()[0])]
+        if res:
+            try:
+                # default r/g/b values to 1 if greater than 255 else x/255
+                value = [1 if int(x) > 255. else (int(x) / 255.)
+                    for x in re.split(',\ ?', res.groups()[0])]
+                if len(value) < 3:
+                    #in case of invalid input like rgb()/rgb(r)/rgb(r, g)
+                    raise ValueError
+            except ValueError, AttributeError:
+                return color_error('Color Parser:Invalid color for %r' % text)
+        else:
+            return color_error('Color Parser:Invalid color for %r' % text)
         if len(value) == 3:
             value.append(1.)
     elif len(text):
@@ -52,8 +69,12 @@ def parse_color(text):
         if lres == 3 or lres == 4:
             res = ''.join([x + x for x in res])
         elif lres != 6 and lres != 8:
-            raise ColorException('Invalid color format for %r' % text)
-        value = [int(res[i:i+2], 16) / 255. for i in xrange(0, len(res), 2)]
+            #raise ColorException('Invalid color format for %r' % text)
+            return color_error('Color Parser:Invalid color format for %r' %text)
+        try:
+            value = [int(res[i:i+2], 16) / 255. for i in xrange(0, len(res), 2)]
+        except ValueError:
+            return color_error('Color Parser:Invalid color for %r' % text)
         if lres == 6:
             value.append(1.)
     return value