Added a flags variable inside Node to represent boolean flags, with
is_in_doc being the first of them. It is updated whenever a node is
appended or removed from a parent.
This patch is for:
https://github.com/mozilla/servo/issues/1030
This reverts commit e8ffac13d7, reversing
changes made to db923feffe.
Reverting this change because FreeType is *not* thread safe. See the
documentation here:
http://www.freetype.org/freetype2/docs/reference/ft2-base_interface.html
"In multi-threaded applications, make sure that the same FT_Library
object or any of its children doesn't get accessed in parallel."
We will need to use a `MutexArc` instead.
This replaces flow construction with a strict bottom-up tree traversal,
allowing for parallelism. Each step of the traversal creates a flow or
a `ConstructionItem`, similar to how Gecko works. {ib} splits are
handled by not creating `InlineFlow`s until the containing block is
reached.
This should be able to be incrementalized by storing the `Flow` from
layout to layout, and performing fixups during flow construction
and/or wiping containing blocks in a previous pass.
Breaks the dependency between `gfx` and `script`, which is nice.
This exposed some performance issues with Rust's `Any` type, which I've filed:
https://github.com/mozilla/rust/issues/10382
The bit I don't like about these changes is that I ended up hiding the document node from the CSS selecting/matching code, so it continues thinking of the document's first child as the root. When I tried to send the full tree including the document node to layout, the layout code refused to create any child flows. When I sent the document's first child without hiding the document, it saw inherited values for properties like font-family, and later tried to treat the document node as an Element when searching for named nodes.
Regressions are:
* Incremental layout is broken
* `:link` is broken
* Source URL is not passed to CSS parser
* `text-decoration` propagation for block containers establishing an inline formatting context is not handled
This also does not remove NetSurf libcss from the build. That can be done in a followup.
This was a team effort. Credits to Deokjin Kim, Ilyong Cho, Jaeman Park, Junyoung Cho, Ryan Choi, Sangeun Kim, Yongjin Kim, Youngmin Yoo, Youngsoo Son.
