156235 2016-04-05 08:55:14 -0700 Shadow DOM: :host() From The First Shadow Context Should Not Style All Shadow Context 2016-04-15 01:16:34 -0700 1 1 1 Unclassified WebKit DOM WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED InRadar P2 Normal --- 1 koivisto webkit-unassigned rniwa webkit-bug-importer oldest_to_newest 1180819 0 koivisto 2016-04-05 08:55:14 -0700 * SUMMARY The first “:host()” context in a template seems to dictate the the “host” styles for all shadow context in the document. Quoting draft from here https://drafts.csswg.org/css-scoping/#host-selector (if it is up-to-date),: “The :host pseudo-class, when evaluated in the context of a shadow tree, matches the shadow tree’s host element. In any other context, it matches nothing.” * STEPS TO REPRODUCE 1. Open included test-case * RESULTS Expected: Host 2 from test case shold have a black border instead of pink. Actual: Both hosts have pink borders. 1180820 1 275668 koivisto 2016-04-05 08:55:56 -0700 Created attachment 275668 test 1180821 2 koivisto 2016-04-05 08:56:25 -0700 <rdar://problem/24668206> 1180826 3 275669 koivisto 2016-04-05 09:11:31 -0700 Created attachment 275669 patch 1180827 4 275669 kling 2016-04-05 09:14:03 -0700 Comment on attachment 275669 patch View in context: https://bugs.webkit.org/attachment.cgi?id=275669&action=review r=me > Source/WebCore/style/StyleSharingResolver.cpp:100 > + if (element.shadowRoot() && !element.shadowRoot()->styleResolver().ruleSets().authorStyle()->hostPseudoClassRules().isEmpty()) This would look so nice if we made authorStyle() return a reference, too. > Source/WebCore/style/StyleSharingResolver.cpp:287 > + if (element.shadowRoot() && !element.shadowRoot()->styleResolver().ruleSets().authorStyle()->hostPseudoClassRules().isEmpty()) Mhm. 1180843 5 koivisto 2016-04-05 09:46:30 -0700 https://trac.webkit.org/r199060 1183645 6 275669 achristensen 2016-04-13 23:28:24 -0700 Comment on attachment 275669 patch View in context: https://bugs.webkit.org/attachment.cgi?id=275669&action=review > Source/WebCore/style/StyleSharingResolver.cpp:288 > + return nullptr; nullptr -> false :( 1184048 7 koivisto 2016-04-15 01:16:34 -0700 > nullptr -> false > :( http://trac.webkit.org/changeset/199584 275668 2016-04-05 08:55:56 -0700 2016-04-05 08:55:56 -0700 test reduced-test-case-host.html text/html 1241 koivisto PCFET0NUWVBFIGh0bWw+CjxodG1sPgogIDxoZWFkPgogICAgPG1ldGEgY2hhcnNldD0idXRmLTgi PgogICAgPHRpdGxlPjwvdGl0bGU+CiAgPC9oZWFkPgogIDxib2R5PgoKICAgIDx0ZW1wbGF0ZSBp ZD0iZm9yLWhvc3QtMSI+CiAgICAgIDxzdHlsZT4KICAgICAgOmhvc3QgewogICAgICAgIGJvcmRl cjogMXB4IHNvbGlkICNmMDk7CiAgICAgIH0KCiAgICAgIDwvc3R5bGU+CiAgICAgIEkgJiM5ODI5 OyA8c2xvdCBuYW1lPSJ3aGF0LUktbG92ZSI+PHNsb3Q+CiAgICA8L3RlbXBsYXRlPgoKICAgIDx0 ZW1wbGF0ZSBpZD0iZm9yLWhvc3QtMiI+CiAgICAgIDxzdHlsZT4KICAgICAgOmhvc3QgewogICAg ICAgIGJvcmRlcjogMXB4IHNvbGlkICMwMDA7CiAgICAgIH0KCiAgICAgIDwvc3R5bGU+CiAgICAg 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