Fix -cha-center moving by negative x

In other words, if the element is wider than it's container, we
don't do anything at all.

1 files changed, 2 insertions, 4 deletions

diff --git a/src/layout/engine.nim b/src/layout/engine.nim
index edc6c2b2..b5da155e 100644
--- a/src/layout/engine.nim
+++ b/src/layout/engine.nim
@@ -832,12 +832,10 @@ proc applyChildPosition(parent, child: BlockBox, spec: bool, x, y: var int, marg
 proc postAlignChild(box, child: BlockBox, width: int, spec: bool) =
   case box.computed{"text-align"}
   of TEXT_ALIGN_CHA_CENTER:
-    child.offset.x += width div 2
-    child.offset.x -= child.width div 2
+    child.offset.x += max(width div 2 - child.width div 2, 0)
   of TEXT_ALIGN_CHA_LEFT: discard
   of TEXT_ALIGN_CHA_RIGHT:
-    child.offset.x += width
-    child.offset.x -= child.width
+    child.offset.x += max(width - child.width, 0)
   else:
     child.offset.x += child.margin_left