draw565: Avoid over-long lines when handling space

Currently, if the line wrapper attempts to break a line on a space and
that space character is outside the bounding box, then we generate an
over-long line.

Fix this by handling line break generation *after* we have checked the
length of the current line.

Fixes: #193
Signed-off-by: Daniel Thompson <daniel@redfelineninja.org.uk>

1 files changed, 8 insertions, 4 deletions

diff --git a/wasp/draw565.py b/wasp/draw565.py
index f82a345..c84b1ec 100644
--- a/wasp/draw565.py
+++ b/wasp/draw565.py
@@ -370,15 +370,19 @@ class Draw565(object):
                 if i >= len(s):
                     break
                 ch = s[i]
+                (_, h, w) = font.get_ch(ch)
+                l += w + 1
+                if l > width:
+                    break
+
+                # Break the line immediately if requested
                 if ch == '\n':
                     end = i+1
                     break
+
+                # Remember the right-most place we can cleanly break the line
                 if ch == ' ':
                     end = i+1
-                (_, h, w) = font.get_ch(ch)
-                l += w + 1
-                if l > width:
-                    break
             if end <= start:
                 end = i
             chunks.append(end)