tree c3fc1b574ba09b56adaafd801c819914cd9d63b1
parent f64f6f28d2b11d76a84e0d1bddfde380d8524d95
author Anders Hartvoll Ruud <andruud@chromium.org> 1740149061 -0800
committer Chromium LUCI CQ <chromium-scoped@luci-project-accounts.iam.gserviceaccount.com> 1740149061 -0800

[functions] Add InspectorCSSAgent::CollectReferencedFunctionRules

This CL adds a function that collects all referenced custom functions
(transitively) within some match result. This is intended to be used
during getMatchedStylesForNode, but it's unused outside of tests
for now.

Function references (<dashed-function>s) are tree-scoped references,
which means that they can only be dereferenced in the context
of the originating tree-scope [1]. The code in this CL generally
prepares for handling this correctly, but just uses the Document
for now (pending Issue 394111301).

[1] https://drafts.csswg.org/css-scoping-1/#css-tree-scoped-reference

Bug: 325504770, 392034817, 394111301
Change-Id: I1269f403b96fc5c21de938fa2402dc0958780bdc
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6253679
Reviewed-by: Philip Pfaffe <pfaffe@chromium.org>
Commit-Queue: Anders Hartvoll Ruud <andruud@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1423099}