122842 2013-10-15 10:10:30 -0700 [CSS Regions] Unforced breaks introduce extraneous space when boxes flowed in region don't have text contents 2022-07-12 17:18:55 -0700 1 1 1 Unclassified WebKit CSS 528+ (Nightly build) Unspecified Unspecified RESOLVED WONTFIX AdobeTracked P2 Normal --- 57312 1 mibalan webkit-unassigned bfulgham WebkitBugTracker oldest_to_newest 940020 0 214278 mibalan 2013-10-15 10:10:30 -0700 Created attachment 214278 HTML file highlighting the problem When a flow consisting of empty boxes (say, <div>s) with a set geometry (width & height) is flowed in a region, boxes flowed after an unforced break will be laid out as if they had margins, even though they don't. Doing the same but with the boxes also having text contents will lay out correctly. In the attached file, you should see two rows, each with two horizontal green rectangles with black borders. The green rectangles are made out of boxes flowed in regions. The boxes in the top right region are shifted downwards even though there's no styling to cause that. Replicating the markup but adding an 'x' in each box produces a correct rendering (bottom row). 1882822 1 bfulgham 2022-07-12 17:18:55 -0700 CSS Regions were removed in Bug 174978. 214278 2013-10-15 10:10:30 -0700 2013-10-15 10:10:30 -0700 HTML file highlighting the problem box-false-margin.html text/html 1106 mibalan PCFkb2N0eXBlIGh0bWw+CjxodG1sIGxhbmc9ImVuIj4KPGhlYWQ+Cgk8bWV0YSBjaGFyc2V0PSJV VEYtOCI+Cgk8dGl0bGU+QnVnIHdpdGggYm94ZXMgZ2V0dGluZyBtYXJnaW5zIHdoZW4gaW4gcmVn aW9uczwvdGl0bGU+Cgk8c3R5bGU+CgkjZW1wdHktYm94ZXMgewoJCS13ZWJraXQtZmxvdy1pbnRv OiBmOwoJfQoJLmVtcHR5IHsKCQktd2Via2l0LWZsb3ctZnJvbTogZjsKCX0KCSN0ZXh0LWJveGVz IHsKCQktd2Via2l0LWZsb3ctaW50bzogZzsKCX0KCS50ZXh0IHsKCQktd2Via2l0LWZsb3ctZnJv bTogZzsKCX0KCS5ib3ggewoJCWRpc3BsYXk6IGlubGluZS1ibG9jazsKCQl3aWR0aDogNTBweDsK CQloZWlnaHQ6IDUwcHg7CgkJYmFja2dyb3VuZC1jb2xvcjogZ3JlZW47CgkJY29sb3I6IGdyZWVu OwoJfQoKCS5yZWdpb24gewoJCWJvcmRlcjogMnB4IHNvbGlkIGJsYWNrOwoJCW1hcmdpbjogMnB4 OwoJCWhlaWdodDogNTBweDsKCQl3aWR0aDogMTAwcHg7CgkJYmFja2dyb3VuZC1jb2xvcjogcmVk OwoJCWRpc3BsYXk6IGlubGluZS1ibG9jazsKCX0KCTwvc3R5bGU+CjwvaGVhZD4KPGJvZHk+CglZ b3Ugc2hvdWxkIHNlZSB0d28gcm93cyBlYWNoIHdpdGggdHdvIGhvcml6b250YWwgZ3JlZW4gcmVj dGFuZ2xlcyB3aXRoIGJsYWNrIGJvcmRlcnMgYW5kIG5vIHJlZC4KCTxkaXYgaWQ9ImVtcHR5LWJv eGVzIj4KCQk8ZGl2IGNsYXNzPSJib3giPjwvZGl2PjxkaXYgY2xhc3M9ImJveCI+PC9kaXY+PGRp diBjbGFzcz0iYm94Ij48L2Rpdj48ZGl2IGNsYXNzPSJib3giPjwvZGl2PgoJPC9kaXY+Cgk8ZGl2 IGlkPSJ0ZXh0LWJveGVzIj4KCQk8ZGl2IGNsYXNzPSJib3giPng8L2Rpdj48ZGl2IGNsYXNzPSJi b3giPng8L2Rpdj48ZGl2IGNsYXNzPSJib3giPng8L2Rpdj48ZGl2IGNsYXNzPSJib3giPng8L2Rp dj4KCTwvZGl2PgoJPGRpdj4KCQk8ZGl2IGNsYXNzPSJlbXB0eSByZWdpb24iPjwvZGl2PgoJCTxk aXYgY2xhc3M9ImVtcHR5IHJlZ2lvbiI+PC9kaXY+Cgk8L2Rpdj4KCTxkaXY+CgkJPGRpdiBjbGFz cz0idGV4dCByZWdpb24iPjwvZGl2PgoJCTxkaXYgY2xhc3M9InRleHQgcmVnaW9uIj48L2Rpdj4K CTwvZGl2Pgo8L2JvZHk+CjwvaHRtbD4=