<!-- Please describe your changes on the following line: -->
This is reviewed by SimonSapin and xidorn in [Bug 1365900](https://bugzilla.mozilla.org/show_bug.cgi?id=1365900).
---
<!-- Thank you for contributing to Servo! Please replace each `[ ]` by `[X]` when the step is complete, and replace `__` with appropriate data: -->
- [X] `./mach build -d` does not report any errors
- [X] `./mach test-tidy` does not report any errors
- [X] These changes fix [Bug 1365900](https://bugzilla.mozilla.org/show_bug.cgi?id=1365900)
Source-Repo: https://github.com/servo/servo
Source-Revision: 00e55dd278f46560e61959a1fd5aa9e1846cb557
--HG--
extra : subtree_source : https%3A//hg.mozilla.org/projects/converted-servo-linear
extra : subtree_revision : 31540bc2de7cc2b7b5bd29a8b59d1963591de14b
- [X] `./mach build -d` does not report any errors
- [X] `./mach test-tidy` does not report any errors
Link to the gecko bug:
https://bugzilla.mozilla.org/show_bug.cgi?id=1355408.
Source-Repo: https://github.com/servo/servo
Source-Revision: 8bc20ee9ac90b56a21bee8c9d507bc4624ef5dc9
--HG--
extra : subtree_source : https%3A//hg.mozilla.org/projects/converted-servo-linear
extra : subtree_revision : 307c61b490fce69f1b559d25159009e75cc25be1
Reviewed by upsuper in https://bugzilla.mozilla.org/show_bug.cgi?id=1345206.
- [x] `./mach build -d` does not report any errors
- [x] `./mach test-tidy` does not report any errors
Source-Repo: https://github.com/servo/servo
Source-Revision: 80f6160580477d5ca984071eeeef26866be5c68e
--HG--
extra : subtree_source : https%3A//hg.mozilla.org/projects/converted-servo-linear
extra : subtree_revision : 7d1005d11d0e336b69f1cab1f7e007f774d0ba89
<!-- Please describe your changes on the following line: -->
Before this PR, every object reflected in CSSOM is in `Arc<RwLock<_>>` to enable safe (synchronized) mutable aliasing. Acquiring all these locks has significant cost during selector matching:
* https://bugzilla.mozilla.org/show_bug.cgi?id=1311469
* https://bugzilla.mozilla.org/show_bug.cgi?id=1335941
* https://bugzilla.mozilla.org/show_bug.cgi?id=1339703
This PR introduce a mechanism to protect many objects with the same `RwLock` that only needs to be acquired once.
In Stylo, there is one such lock per process (in a `lazy_static`), used for everything.
I non-Stylo Servo, I originally intended to have one such lock per document (for author-origin stylesheets, and one per process for user-agent and user sytlesheets since they’re shared across documents, and never mutated anyway). However I failed to have the same document-specific (or pipeline-specific) `Arc` reachable from both `Document` nodes and `LayoutThread`. Recursively following callers lead me to include this `Arc` in `UnprivilegedPipelineContent`, but that needs to be serializable. So there is a second process-wide lock.
This was previously #15998, closed accidentally.
---
<!-- Thank you for contributing to Servo! Please replace each `[ ]` by `[X]` when the step is complete, and replace `__` with appropriate data: -->
- [x] `./mach build -d` does not report any errors
- [x] `./mach test-tidy` does not report any errors
- [ ] These changes fix #__ (github issue number if applicable).
<!-- Either: -->
- [ ] There are tests for these changes OR
- [ ] These changes do not require tests because _____
<!-- Pull requests that do not address these steps are welcome, but they will require additional verification as part of the review process. -->
Source-Repo: https://github.com/servo/servo
Source-Revision: bb54f0a429de0e8b8861f8071b6cf82f73622664
--HG--
extra : subtree_source : https%3A//hg.mozilla.org/projects/converted-servo-linear
extra : subtree_revision : 851230e57ac8775707df5f0f103be5feac81fc41
r? @SimonSapin or @mbrubeck
cc @heycam and @bholley
Source-Repo: https://github.com/servo/servo
Source-Revision: 38f136175e15acb6472466d141dedb6a253b0330
<!-- Please describe your changes on the following line: -->
---
<!-- Thank you for contributing to Servo! Please replace each `[ ]` by `[X]` when the step is complete, and replace `__` with appropriate data: -->
- [x] `./mach build -d` does not report any errors
- [x] `./mach test-tidy` does not report any errors
- [ ] These changes fix #__ (github issue number if applicable).
<!-- Either: -->
- [ ] There are tests for these changes OR
- [ ] These changes do not require tests because _____
<!-- Pull requests that do not address these steps are welcome, but they will require additional verification as part of the review process. -->
Source-Repo: https://github.com/servo/servo
Source-Revision: 40917e7991ddd0f1fdcf83f0bf637a721f37256a
CSSOM is now starting to be useful!
Based on #14190. Only the <s>last commit</s> last two commits need review.
cc @xidorn . This doesn't change the style API, but adds useful methods.
part of #11420
This adds:
- `insertRule()` and `deleteRule()` on `CSSStyleSheet`, `CSSGroupingRule`
- `.style` getters on link and style elements
- Keyframes-backed `CSSRules` and `CSSKeyframesRule.cssRules`
- `CSSGroupingRule.cssRules`
- `prefix` and `namespaceURI` attributes of `CSSNamespaceRule`
- Fixups regarding parent stylesheets
r? @SimonSapin
Source-Repo: https://github.com/servo/servo
Source-Revision: 996756687cd741ad0d30029022638bdcceecb563
This PR is intended to add basic support for all CSSOM interfaces, with the ability to index `document.styleSheets` and css rule lists, and serializing individual css rules. Handling individual interface methods for CSSRule subclasses can probably be done with easy/medium bugs.
Mutation safety isn't dealt with here; if the css rule list is mutated the CSSOM will be in an inconsistent state. I intend to deal with this via zero sized tokens, see https://groups.google.com/forum/#!topic/mozilla.dev.servo/AnxJoVmtMXQ . I'll handle that when I start making the CSSOM mutable. (Getting the immutable bit landed first opens this up for easy bugs)
This doesn't really change style aside from adding an extra arc in the CSS rule list as discussed in the linked thread. So far this same design can be used by stylo as well when the time comes.
f? @SimonSapin @emilio
cc @upsuper
part of #11420
Todo:
- [x] Stubs for rest of the CSSRule subclasses
- [x] <s>ToCSS impls for CSSRules.</s> May make into easy bugs and stub out in this PR https://github.com/servo/servo/issues/14195
- [x] Cache CSSStyleSheet on the relevant node
Source-Repo: https://github.com/servo/servo
Source-Revision: afc60bee2809059b8b754a1c6d6d10c1d36326fb
