3390 2005-06-09 13:41:04 -0700 Destination anchors are sometimes ignored 2010-09-15 01:00:14 -0700 1 1 1 Unclassified WebKit Page Loading 412 Mac OS X 10.4 RESOLVED FIXED http://www.pochour.com/test.html#test InRadar P2 Normal --- 1 etienne webkit-unassigned abarth bdakin cblackst ddkilzer eric ian koivisto mitz mrowe webkit-bugs oldest_to_newest 11185 0 etienne 2005-06-09 13:41:05 -0700 http://www.pochour.com/test.html#test This link should scroll down to the <p id="test"> element. Works in Firefox 1.0.3, OmniWeb 5.0.1, iCab 3; fails in Safari 2.0 (412, 10.4.1). Removing line 5 (<link ... />) seems to fix it. 11187 1 etienne 2005-06-09 13:48:46 -0700 I should add that it *sometimes* seem to work properly. If it does, try downloading the HTML file locally, loading that file in Safari and manually adding "#test" after the URL. This consistently fails here. 11213 2 c.petersen87 2005-06-09 18:04:44 -0700 I can confirm this on both TOT and Safari 2 (v412). This link will fail to scroll to the bottom of page when it's processed for the first time. If I click on the link (http://www.pochour.com/test.html#test) , press the back arrow to return back, then click the link again, the page will be scrolled to the bottom after this link is processed again. 22083 3 stuartmorgan 2005-10-14 08:13:43 -0700 *** Bug 5366 has been marked as a duplicate of this bug. *** 22093 4 cblackst 2005-10-14 09:57:04 -0700 I think this has something to do with alternate style sheets. I set up http://www.arlington.k12.va.us/webmaster/test_anchor/ Following the links in the No CSS Links Page section works every time There is less success with the links under the last 2 lists. When they come up unstyled, they work correctly, but if you scroll to the top of the destination page and click on one of the "A"s to select a style sheet, often the destinations then don't work. 19178 5 mrowe 2007-03-13 02:49:19 -0700 The scrolling to anchor is handled in FrameLoader::gotoAnchor. In the failing case the node referenced by the anchor does not yet have a renderer when the HTML parsing finishes as the document still has stylesheets loading. As there is no renderer it is not possible to scroll the enclosing layer to the correct position. It seems as though gotoLayer needs to be called again once the pending stylesheets have loaded so that the nodes renderer will definitely be around. 18860 6 13627 mrowe 2007-03-13 23:01:43 -0700 Created attachment 13627 Patch 18884 7 13627 darin 2007-03-14 07:57:14 -0700 Comment on attachment 13627 Patch But what if the user has been interacting with the page and has done some scrolling of his own? 18894 8 ddkilzer 2007-03-14 10:57:53 -0700 I think Bug 12420 is a duplicate of this bug. 18895 9 ddkilzer 2007-03-14 10:58:23 -0700 Reassigning to webkit-unassigned for more visibility. 18897 10 ddkilzer 2007-03-14 11:00:54 -0700 *** Bug 12420 has been marked as a duplicate of this bug. *** 18898 11 ddkilzer 2007-03-14 11:01:56 -0700 (In reply to comment #10) > *** Bug 12420 has been marked as a duplicate of this bug. *** <rdar://problem/5045723> 18756 12 mrowe 2007-03-14 22:07:08 -0700 (In reply to comment #7) > (From update of attachment 13627 [edit]) > But what if the user has been interacting with the page and has done some > scrolling of his own? > The behaviour is the same as with a very large page with no external resources that has anchors near the bottom was loaded. In that situation the user is able to interact with the page until the parsing completes and then we scroll to the anchor. It's tricky to reproduce this at work with such a quick network connection, but you can see this behaviour by visiting <http://www.whatwg.org/specs/web-forms/current-work/?#acknowledgements>. As soon as the scrollbar appears, click in the trough to page down. When the document finishes loading you will be taken from your view of the start of the Table of Contents down to the Acknowledgement section. 18734 13 mitz 2007-03-14 23:52:29 -0700 (In reply to comment #12) > The behaviour is the same as with a very large page with no external resources > that has anchors near the bottom was loaded. Bug 4051? 18736 14 mrowe 2007-03-15 00:09:35 -0700 Yes, that would be it. 18737 15 mrowe 2007-03-15 00:10:34 -0700 Actually, on closer inspection that is different. Restoring the view position and jumping to an anchor are handled separately. 18719 16 ddkilzer 2007-03-15 04:28:27 -0700 (In reply to comment #12) > The behaviour is the same as with a very large page with no external resources > that has anchors near the bottom was loaded. In that situation the user is > able to interact with the page until the parsing completes and then we scroll > to the anchor. It's tricky to reproduce this at work with such a quick network > connection, but you can see this behaviour by visiting > <http://www.whatwg.org/specs/web-forms/current-work/?#acknowledgements>. As > soon as the scrollbar appears, click in the trough to page down. When the > document finishes loading you will be taken from your view of the start of the > Table of Contents down to the Acknowledgement section. Are Firefox, MSIE or Opera nice enough not to re-scroll to the anchor after the user has started scrolling themselves? In my limited amount of testing, both Firefox 2.0.0.2 and Opera 9.10 still attempt to scroll to the anchor after the user has scrolled while the page was loading. 18675 17 mrowe 2007-03-15 04:52:58 -0700 Camino was the only other browser I tested in, and it also scrolls to the anchor even if the user has scrolled before the anchor had loaded. 18666 18 13627 koivisto 2007-03-15 05:40:07 -0700 Comment on attachment 13627 Patch With this patch the view may scroll to correct position when parsing completes, user starts scrolling around and then the view will suddenly jump back to anchor on load complete. I don't think this is a good behavior. Perhaps it would make sense to check if you have scrolled to a particular position already. That would eliminate many cases of unnecessary double scrolling. 18663 19 koivisto 2007-03-15 06:01:45 -0700 Or maybe it shouldn't jump at all if it has already done one jump and user has scrolled the view? Or in that case check the difference between new and old target position and only scroll if it is big? 18325 20 koivisto 2007-03-15 11:07:24 -0700 Outside scope of this bug, but... Current approach to anchor scrolling is not optimal in general. Jumping should not be tied to parse complete/load complete. On a slow loading document or one with blocking javascript load at the end the jump maybe happen long after the target position has appeared on the screen, giving perception of slowness. Perhaps the jump could be done earlier, at first repaint after the renderer for target anchor has been created and placed in layout (and document is sufficiently tall to put it to top of the page). 18350 21 mrowe 2007-03-15 18:41:25 -0700 Antti, that approach would lead to similar issues if you had, for example, images higher up the page with a large intrinsic heigh and no explicit height set. We would scroll to the anchor when it is first painted, then the images would load, another layout would take place and the anchor could be shifted a considerable distance from where we initially scrolled to. 15246 22 ddkilzer 2007-04-09 21:00:45 -0700 (In reply to comment #21) > Antti, that approach would lead to similar issues if you had, for example, > images higher up the page with a large intrinsic heigh and no explicit height > set. We would scroll to the anchor when it is first painted, then the images > would load, another layout would take place and the anchor could be shifted a > considerable distance from where we initially scrolled to. See Bug 13311. 15242 23 mrowe 2007-04-09 21:02:18 -0700 To clarify on Dave's comment, bug 13311 is an example of a situation in which images loading after the scroll already causes it to appear as though we have scrolled to the wrong place. It's horrible. 3871 24 ddkilzer 2007-07-23 22:30:13 -0700 Should be fixed by r24550: http://trac.webkit.org/projects/webkit/changeset/24550 3870 25 ddkilzer 2007-07-23 22:32:50 -0700 *** Bug 9549 has been marked as a duplicate of this bug. *** 3863 26 ddkilzer 2007-07-23 22:33:19 -0700 *** Bug 14001 has been marked as a duplicate of this bug. *** 279449 27 abarth 2010-09-15 01:00:14 -0700 This bug claims to have been fixed in Comment #24. 13627 2007-03-13 23:01:43 -0700 2010-06-10 15:15:16 -0700 Patch webkit-bug-3390-v1.patch text/plain 8577 mrowe SW5kZXg6IExheW91dFRlc3RzL0NoYW5nZUxvZwo9PT09PT09PT09PT09PT09PT09PT09PT09PT09 PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09Ci0tLSBMYXlvdXRUZXN0cy9D aGFuZ2VMb2cJKHJldmlzaW9uIDIwMTgxKQorKysgTGF5b3V0VGVzdHMvQ2hhbmdlTG9nCSh3b3Jr aW5nIGNvcHkpCkBAIC0xLDMgKzEsMTMgQEAKKzIwMDctMDMtMTQgIE1hcmsgUm93ZSAgPG1yb3dl QGFwcGxlLmNvbT4KKworICAgICAgICBSZXZpZXdlZCBieSBOT0JPRFkgKE9PUFMhKS4KKworICAg 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