Fix crash in DL building
Fix one crash and some style changes.
This HTML crashed servo before. Key parts are `background-clip: content-box` and `direction: rtl`
```html
<!DOCTYPE html>
<html>
<style>
#span1 {
background-clip: content-box;
}
#span2
{
direction: rtl;
}
</style>
<span id="span1">Filler Text <span id="span2">txeT relliF</span></span>
</html>
```
Should I add this as a test? And where do I put this "does-it-crash?" test?
I find always passing rectangles by value a lot easier as it avoids many references and dereferences and I assume that the compiler will always use the faster one either way. If you don't like the change feel free to only merge the first commit.
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Prior to this change, if none of the fonts specified in CSS contained a
glyph for a codepoint, we tried only one fallback font. If that font
didn't contain the glyph, we'd give up.
With this change, we try multiple fonts in turn. The font names we try
differ across each platform, and based on the codepoint we're trying to
match. The current implementation is heavily inspired by the analogous
code in Gecko, but I've used to ucd lib to make it more readable,
whereas Gecko matches raw unicode ranges.
This fixes some of the issues reported in #17267, although colour emoji
support is not implemented.
== Notes on changes to WPT metadata ==
=== css/css-text/i18n/css3-text-line-break-opclns-* ===
A bunch of these have started failing on macos when they previously
passed.
These tests check that the browser automatically inserts line breaks
near certain characters that are classified as "opening and closing
punctuation". The idea is that if we have e.g. an opening parenthesis,
it does not make sense for it to appear at the end of a line box; it
should "stick" to the next character and go into the next line box.
Before this change, a lot of these codepoints rendered as a missing
glyph on Mac and Linux. In some cases, that meant that the test was
passing.
After this change, a bunch of these codepoints are now rendering glyphs
on Mac (but not Linux). In some cases, the test should continue to pass
where it previously did when rendering with the missing glyph.
However, it seems this has also exposed a layout bug. The "ref" div in
these tests contains a <br> element, and it seems that this, combined
with these punctuation characters, makes the spacing between glyphs ever
so slightly different to the "test" div. (Speculation: might be
something to do with shaping?)
Therefore I've had to mark a bunch of these tests failing on mac.
=== css/css-text/i18n/css3-text-line-break-baspglwj-* ===
Some of these previously passed on Mac due to a missing glyph. Now that
we're rendering the correct glyph, they are failing.
=== css/css-text/word-break/word-break-normal-bo-000.html ===
The characters now render correctly on Mac, and the test is passing. But
we do not find a suitable fallback font on Linux, so it is still failing
on that platform.
=== css/css-text/word-break/word-break-break-all-007.html ===
This was previously passing on Mac, but only because missing character
glyphs were rendered. Now that a fallback font is able to be found, it
(correctly) fails.
=== mozilla/tests/css/font_fallback_* ===
These are new tests added in this commit. 01 and 02 are marked failing
on Linux because the builders don't have the appropriate fonts installed
(that will be a follow-up).
Fix build errors from rebase
FontTemplateDescriptor can no longer just derive(Hash). We need to
implement it on each component part, because the components now
generally wrap floats, which do not impl Hash because of NaN. However in
this case we know that we won't have a NaN, so it is safe to manually
impl Hash.
Issue #20556: Implement proper checks in WebGLRenderingContext's bindBuffer()
Implement missing check, about deleted buffers.
---
- [X] `./mach build -d` does not report any errors
- [X] `./mach build-geckolib` does not report any errors
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- [X] These changes fix#20556
- [X] There are tests for these changes
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Webgl fixes
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Add gl.getParameter() support for webgl unpack settings, and remove some unreachable and incorrect error-generation code
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- [x] These changes fix#20372
- [x] These changes fix#20553
- [x] These changes fix#20554
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Implement MutationObserver.disconnect()
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This implements https://dom.spec.whatwg.org/#dom-mutationobserver-disconnect
I added a `node_list` to the `MutationObserver` struct to keep track of the nodes involved in an observer because otherwise I could not find a way to unregister the observers on the node themselves without traversing the whole document tree. Let me know if there's something I missed.
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Automatically provide a resource reader for tests
Fix#20710
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Implement beforeunload event and infrastructure
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Implementation of:
1. https://html.spec.whatwg.org/multipage/#prompt-to-unload-a-document, and
2. https://html.spec.whatwg.org/multipage/#unload-a-document
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- [ ] These changes fix#10787 and fix#20485 and fix#20588 and fix#20496 (github issue number if applicable).
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Use the color clip corresponding to the last background-image instead
of the last background-clip. (There may be more clips than images and
clips are repeated if there are less clips than images.)
Add a test.
Implement border-image-outset
Add an automatic test for border-image-outset with a gradient.
Convert two tests from UTF-8 LE with CRLF line endings to
UTF-8 with LF endings as the old files could not be viewed with servo.
Closes#16638
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Add an automatic test for border-image-outset with a gradient.
Convert two tests from UTF-8 LE with CRLF line endings to
UTF-8 with LF endings as the old files could not be viewed with servo.
Closes#16638
MutationObserver api: Implement takeRecords() and characterData mutations
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I started by looking at adding support for `takeRecords()` to get fluent.js to work on Servo. To get the wpt tests to pass I ended up implementing character data mutations (most of the plumbing was already there) and this fixed a few more tests.
We are still missing support for `disconnect()`, which I keep for a followup.
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Make session history aware of URLs
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Move DL items from gfx to layout and implement corner clipping
Implement corner clipping.
Remove PixelFormat from WebrenderImageInfo.
Use WebRender text shadow.
Remove MallocSizeOf and Deserialize for DL items.
Closes#19649, closes#19680, closes#19802
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Delegate resource reading to embedder
Now the embedder provides the content of the files itself. Now, on Android, we can use regular assets instead of unzipping all the resources on the scared at startup.
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