make drawing image map shapes work when <img> precedes <map>

http://lists.auriga.wearlab.de/pipermail/dillo-dev/2010-March/007406.html

Johannes wrote the code, and I (corvid) added some big comments of the sort
alluded to in that thread.

1 files changed, 7 insertions, 0 deletions

diff --git a/dw/image.hh b/dw/image.hh
index 8e133b28..a8314d4f 100644
--- a/dw/image.hh
+++ b/dw/image.hh
@@ -159,6 +159,13 @@ public:
 
    void setIsMap ();
    void setUseMap (ImageMapsList *list, Object *key);
+
+   /* This is a hack for the perhaps frivolous feature of drawing image map
+    * shapes when there is no image to display. If the map is defined after
+    * an image using an image map, and the actual image data has not been
+    * loaded, tell the image to redraw.
+    */
+   void forceMapRedraw () { if (mapKey && ! buffer) queueDraw (); };
 };
 
 } // namespace dw