120546 2013-08-30 12:52:54 -0700 [CSS Regions] Region overset is reported incorectly for auto height regions 2014-03-17 00:48:31 -0700 1 1 1 Unclassified WebKit Layout and Rendering 528+ (Nightly build) Unspecified Unspecified RESOLVED FIXED AdobeTracked P2 Normal --- 128165 1 achicu mihnea abucur WebkitBugTracker oldest_to_newest 923150 0 210152 achicu 2013-08-30 12:52:54 -0700 Created attachment 210152 Test case Open the attached test case. The region is auto-height so it should say fit instead of overset. It seems like the issue is related to the line-height CSS property. 923333 1 mihnea 2013-08-31 13:06:35 -0700 (In reply to comment #0) > Created an attachment (id=210152) [details] > Test case > > Open the attached test case. The region is auto-height so it should say fit instead of overset. > > It seems like the issue is related to the line-height CSS property. It is related to the line-height property. For instance, in the following case: <div style="font-size: 100px; font-family: Times; width: 200px; border: 1px solid red;">&#x00ce;</div> the special character will be rendered properly inside the box, which will have a height of 117 (115 from font + 2 from border). When you are setting the line-height to a certain value, say 1em, you are forcing the height of the div to be 102 (100 + border) and the content will overflow the box. <div style="font-size: 100px; font-family: Times; width: 200px; border: 1px solid red; line-height: 1em">&#x00ce;</div> If you flow the above box, with line-height in a region with height: auto, the height of the region will be computed based on the height of the box (102) but since the content overflows the box, it will overflow the region too, causing the overset being reported instead of fit. In your sample, if you set the line-height: 1.2, which is roughly the value for the default normal value for line-height, the content will not overflow the box and the reported value will be fit. In my opinion, although the behavior is confusing, it is not a bug. I am attaching a sample without regions in which i played with boxes and line-height and overflow: hidden. Take a look and tell me your opinion about this. 923335 2 210209 mihnea 2013-08-31 13:07:48 -0700 Created attachment 210209 Alternate test without regions 991133 3 abucur 2014-03-17 00:48:31 -0700 This was fixed in https://bugs.webkit.org/show_bug.cgi?id=129032. Closing. 210152 2013-08-30 12:52:54 -0700 2013-08-30 12:52:54 -0700 Test case page1.html text/html 1730 achicu PCFET0NUWVBFIGh0bWw+CjxodG1sPgogICAgPGhlYWQ+CiAgICAgIDxzdHlsZT4KI2JveDEgewog ICAgd2lkdGg6IDIwMHB4OwogICAgLXdlYmtpdC1mbG93LWZyb206IGZsb3dDb250YWluZXI7Cn0K I2Zsb3dDb250YWluZXIgewogICAgLXdlYmtpdC1mbG93LWludG86IGZsb3dDb250YWluZXI7CiAg ICBsaW5lLWhlaWdodDogMWVtOwp9CiAgPC9zdHlsZT4KICAgIDwvaGVhZD4KICAgIDxib2R5PgoK ICA8ZGl2IGlkPSJyZXN1bHQiPjwvZGl2PgoJPGRpdj4KICAgICAgIDxkaXYgaWQ9J2JveDEnPgog ICAgICAgPC9kaXY+CiAgICAgICA8ZGl2IGlkPSdmbG93Q29udGFpbmVyJz4KICAgICAgICAgICAK ICAgICAgICAgICBMb3JlbSBpcHN1bSBkb2xvciBzaXQgYW1ldCwgY29uc2VjdGV0dWVyIGFkaXBp c2NpbmcgZWxpdCwgc2VkIGRpYW0gbm9udW1teSBuaWJoIGV1aXNtb2QgdGluY2lkdW50IHV0IGxh b3JlZXQgZG9sb3JlIG1hZ25hIGFsaXF1YW0gZXJhdCB2b2x1dHBhdC4gVXQgd2lzaSBlbmltIGFk IG1pbmltIHZlbmlhbSwgcXVpcyBub3N0cnVkIGV4ZXJjaSB0YXRpb24gdWxsYW1jb3JwZXIgc3Vz Y2lwaXQgbG9ib3J0aXMgbmlzbCB1dCBhbGlxdWlwIGV4IGVhIGNvbW1vZG8gY29uc2VxdWF0LiBE dWlzIGF1dGVtIHZlbCBldW0gaXJpdXJlIGRvbG9yIGluIGhlbmRyZXJpdCBpbiB2dWxwdXRhdGUg dmVsaXQgZXNzZSBtb2xlc3RpZSBjb25zZXF1YXQsIHZlbCBpbGx1bSBkb2xvcmUgZXUgZmV1Z2lh dCBudWxsYSBmYWNpbGlzaXMgYXQgdmVybyBlcm9zIGV0IGFjY3Vtc2FuIGV0IGl1c3RvIG9kaW8g ZGlnbmlzc2ltIHF1aSBibGFuZGl0IHByYWVzZW50IGx1cHRhdHVtIHp6cmlsIGRlbGVuaXQgYXVn dWUgZHVpcyBkb2xvcmUgdGUgZmV1Z2FpdCBudWxsYSBmYWNpbGlzaS4gTmFtIGxpYmVyIHRlbXBv ciBjdW0gc29sdXRhIG5vYmlzIGVsZWlmZW5kIG9wdGlvbiBjb25ndWUgbmloaWwgaW1wZXJkaWV0 IGRvbWluZyBpZCBxdW9kIG1hemltIHBsYWNlcmF0IGZhY2VyIHBvc3NpbSBhc3N1bS4gVHlwaSBu b24gaGFiZW50IGNsYXJpdGF0ZW0gaW5zaXRhbTsgZXN0IHVzdXMgbGVnZW50aXMgaW4gaWlzIHF1 aSBmYWNpdCBlb3J1bSBjbGFyaXRhdGVtLiBJbnZlc3RpZ2F0aW9uZXMgZGVtb25zdHJhdmVydW50 IGxlY3RvcmVzIGxlZ2VyZSBtZSBsaXVzIHF1b2QgaWkgbGVndW50IHNhZXBpdXMuIENsYXJpdGFz IGVzdCBldGlhbSBwcm9jZXNzdXMgZHluYW1pY3VzLCBxdWkgc2VxdWl0dXIgbXV0YXRpb25lbSBj b25zdWV0dWRpdW0gbGVjdG9ydW0uIE1pcnVtIGVzdCBub3RhcmUgcXVhbSBsaXR0ZXJhIGdvdGhp Y2EsIHF1YW0gbnVuYyBwdXRhbXVzIHBhcnVtIGNsYXJhbSwgYW50ZXBvc3Vlcml0IGxpdHRlcmFy dW0gZm9ybWFzIGh1bWFuaXRhdGlzIHBlciBzZWFjdWxhIHF1YXJ0YSBkZWNpbWEgZXQgcXVpbnRh IGRlY2ltYS4gRW9kZW0gbW9kbyB0eXBpLCBxdWkgbnVuYyBub2JpcyB2aWRlbnR1ciBwYXJ1bSBj bGFyaSwgZmlhbnQgc29sbGVtbmVzIGluIGZ1dHVydW0uCiAgICAgICAgICAgCiAgICAgICA8L2Rp dj4KCTwvZGl2PgoKICAKCiAgPHNjcmlwdD4KICAgIHZhciByZXN1bHRFbCA9IGRvY3VtZW50Lmdl dEVsZW1lbnRCeUlkKCJyZXN1bHQiKTsKICAgIHJlc3VsdEVsLmlubmVySFRNTCA9IGRvY3VtZW50 LmdldEVsZW1lbnRCeUlkKCJib3gxIikud2Via2l0UmVnaW9uT3ZlcnNldDsKICA8L3NjcmlwdD4K ICAgIDwvYm9keT4KPC9odG1sPgo= 210209 2013-08-31 13:07:48 -0700 2013-08-31 13:07:48 -0700 Alternate test without regions 120546-related.html text/html 863 mihnea PCFET0NUWVBFIGh0bWw+CjxodG1sPgogICAgPGhlYWQ+CiAgICAgIDxzdHlsZT4KICAgICAgICAu Ym94IHsKICAgICAgICAgIGZvbnQtc2l6ZTogMTAwcHg7CiAgICAgICAgICBmb250LWZhbWlseTog VGltZXM7CiAgICAgICAgICB3aWR0aDogMjAwcHg7CiAgICAgICAgICBib3JkZXI6IDFweCBzb2xp ZCByZWQ7CiAgICAgICAgfQoKICAgICAgICAjZmxvd0NvbnRhaW5lciB7CiAgICAgICAgICBsaW5l LWhlaWdodDogMTsKICAgICAgICB9CgogICAgICAgICNmbG93Q29udGFpbmVyMiB7CiAgICAgICAg ICBsaW5lLWhlaWdodDogMTsKICAgICAgICAgIG92ZXJmbG93OiBoaWRkZW47CiAgICAgICAgfQoK ICAgICAgICAjZmxvd0NvbnRhaW5lcjMgewogICAgICAgICAgbGluZS1oZWlnaHQ6IDEuMjsKICAg ICAgICB9CiAgPC9zdHlsZT4KICAgIDwvaGVhZD4KICAgIDxib2R5PgogICAgICAgIDxici8+CiAg ICAgICAgPGRpdiBjbGFzcz0iYm94Ij4mI3gwMGNlOyYjeDAwY2U7JiN4MDBjZTsmI3gwMGNlOyYj eDAwY2U7PC9kaXY+CiAgICAgICAgPGJyLz4KICAgICAgICA8ZGl2IGNsYXNzPSJib3giIGlkPSdm bG93Q29udGFpbmVyJz4mI3gwMGNlOyYjeDAwY2U7JiN4MDBjZTsmI3gwMGNlOyYjeDAwY2U7PC9k aXY+CiAgICAgICAgPGJyLz4KICAgICAgICA8ZGl2IGNsYXNzPSJib3giIGlkPSdmbG93Q29udGFp bmVyMic+JiN4MDBjZTsmI3gwMGNlOyYjeDAwY2U7JiN4MDBjZTsmI3gwMGNlOzwvZGl2PgogICAg ICAgIDxici8+CiAgICAgICAgPGRpdiBjbGFzcz0iYm94IiBpZD0nZmxvd0NvbnRhaW5lcjMnPiYj eDAwY2U7JiN4MDBjZTsmI3gwMGNlOyYjeDAwY2U7JiN4MDBjZTs8L2Rpdj4KICAgIDwvYm9keT4K PC9odG1sPgo=