From fc11572aa644ed54fcad90b464fbf99f2d806a4b Mon Sep 17 00:00:00 2001
From: Mathieu Virbel <mat@kivy.org>
Date: Mon, 9 Apr 2012 18:26:19 +0200
Subject: [PATCH] textinput: avoid pygame error when the text is too large. use
 dichotomy to found the maximum characters we can handle in the line. most of
 the time, the line will be re-arranged in the next layout, except if no space
 are found. closes #420

---
 kivy/uix/textinput.py | 30 ++++++++++++++++++++++++++++--
 1 file changed, 28 insertions(+), 2 deletions(-)

diff --git a/kivy/uix/textinput.py b/kivy/uix/textinput.py
index eb022b7c4..a14043625 100644
--- a/kivy/uix/textinput.py
+++ b/kivy/uix/textinput.py
@@ -877,9 +877,35 @@ class TextInput(Widget):
         kw = self._get_line_options()
         cid = '%s\0%s' % (ntext, str(kw))
         texture = Cache.get('textinput.label', cid)
+
         if not texture:
-            label = Label(text=ntext, **kw)
-            label.refresh()
+            # FIXME right now, we can't render very long line...
+            # if we move on "VBO" version as fallback, we won't need to do this.
+            # try to found the maximum text we can handle
+            label = None
+            label_len = len(ntext)
+            ld = None
+            while True:
+                try:
+                    label = Label(text=ntext[:label_len], **kw)
+                    label.refresh()
+                    if ld is not None and ld > 2:
+                        ld = int(ld / 2)
+                        label_len += ld
+                    else:
+                        break
+                except:
+                    # exception happen when we tried to render the text
+                    # reduce it...
+                    if ld is None:
+                        ld = len(ntext)
+                    ld = int(ld / 2)
+                    if ld < 2 and label_len:
+                        label_len -= 1
+                    label_len -= ld
+                    continue
+
+            # ok, we found it.
             texture = label.texture
             Cache.append('textinput.label', cid, texture)
         return texture