{"action":"created","comment":{"url":"https://api.github.com/repos/servo/servo/pulls/comments/41193815","id":41193815,"diff_hunk":"@@ -76,6 +76,51 @@ impl OpaqueNode {\n     }\n }\n \n+/// LayerInfo is used to store information PaintLayer metadata during DisplayList construction.","path":"components/gfx/display_list/mod.rs","position":4,"original_position":4,"commit_id":"ce985b407c9cb6502bd492a4a39b4665c7007ea6","original_commit_id":"ce985b407c9cb6502bd492a4a39b4665c7007ea6","user":{"login":"mrobinson","id":13536,"avatar_url":"https://avatars.githubusercontent.com/u/13536?v=3","gravatar_id":"","url":"https://api.github.com/users/mrobinson","html_url":"https://github.com/mrobinson","followers_url":"https://api.github.com/users/mrobinson/followers","following_url":"https://api.github.com/users/mrobinson/following{/other_user}","gists_url":"https://api.github.com/users/mrobinson/gists{/gist_id}","starred_url":"https://api.github.com/users/mrobinson/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/mrobinson/subscriptions","organizations_url":"https://api.github.com/users/mrobinson/orgs","repos_url":"https://api.github.com/users/mrobinson/repos","events_url":"https://api.github.com/users/mrobinson/events{/privacy}","received_events_url":"https://api.github.com/users/mrobinson/received_events","type":"User","site_admin":false},"body":"Oh, thanks for catching this. I think I meant to write:\r\n\"LayerInfo is used to store PaintLayer metadata during DisplayList construction.\"\r\n","created_at":"2015-10-05T20:33:58Z","updated_at":"2015-10-05T20:33:58Z","html_url":"https://github.com/servo/servo/pull/7822#discussion_r41193815","pull_request_url":"https://api.github.com/repos/servo/servo/pulls/7822","_links":{"self":{"href":"https://api.github.com/repos/servo/servo/pulls/comments/41193815"},"html":{"href":"https://github.com/servo/servo/pull/7822#discussion_r41193815"},"pull_request":{"href":"https://api.github.com/repos/servo/servo/pulls/7822"}}},"pull_request":{"url":"https://api.github.com/repos/servo/servo/pulls/7822","id":46588064,"html_url":"https://github.com/servo/servo/pull/7822","diff_url":"https://github.com/servo/servo/pull/7822.diff","patch_url":"https://github.com/servo/servo/pull/7822.patch","issue_url":"https://api.github.com/repos/servo/servo/issues/7822","number":7822,"state":"open","locked":false,"title":"Rework how StackingContexts are dynamically added to layers","user":{"login":"mrobinson","id":13536,"avatar_url":"https://avatars.githubusercontent.com/u/13536?v=3","gravatar_id":"","url":"https://api.github.com/users/mrobinson","html_url":"https://github.com/mrobinson","followers_url":"https://api.github.com/users/mrobinson/followers","following_url":"https://api.github.com/users/mrobinson/following{/other_user}","gists_url":"https://api.github.com/users/mrobinson/gists{/gist_id}","starred_url":"https://api.github.com/users/mrobinson/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/mrobinson/subscriptions","organizations_url":"https://api.github.com/users/mrobinson/orgs","repos_url":"https://api.github.com/users/mrobinson/repos","events_url":"https://api.github.com/users/mrobinson/events{/privacy}","received_events_url":"https://api.github.com/users/mrobinson/received_events","type":"User","site_admin":false},"body":"StackingContexts are added to layers when it is necessary to maintain\r\ntheir ordering on top of other layered StackingContexts. Instead of\r\ntracking the information about a layer scattered around into different\r\nstructs, combine it all into LayerInfo. LayerInfo will be used in the\r\nfuture to hold layer information for DisplayItems that are layerized\r\nindependently of StackingContexts.\n\n<!-- Reviewable:start -->\n[<img src=\"https://reviewable.io/review_button.png\" height=40 alt=\"Review on Reviewable\"/>](https://reviewable.io/reviews/servo/servo/7822)\n<!-- Reviewable:end 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