Revert previously merged code, better implementation for Default selectionStart and selectionEnd
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added AutoCloseWorker for closing related workers when a page/another worker is closed.
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Followed steps as suggested in issue.
Error is not yet resolved!
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Add font cache debugging to isolate cause of IPC failures in CI.
This should help us better understand the actual underlying cause of frequent CI failures like #13509. In particular, we will be able to state with confidence whether an IPC message is being dropped while the font cache thread is still alive, or whether the dropped sender was in a message that was in the queue after the font cache thread was shutdown.
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- [x] There are tests for these changes
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Disallow mutating the internals of TextInput
The TextInput::assert_ok_selection() method is meant to ensure that we
are not getting into a state where a selection refers to a location in
the control's contents which doesn't exist.
However, before this change we could have a situation where the
internals of the TextInput are changed by another part of the code,
without using its public API. This could lead to us having an invalid
selection.
I did manage to trigger such a situation (see the test added in this
commit) although it is quite contrived. There may be others that I
didn't think of, and it's also possible that future changes could
introduce new cases. (Including ones which trigger panics, if indexing
is used on the assumption that the selection indices are always valid.)
The current HTML specification doesn't explicitly say that
selectionStart/End must remain within the length of the content, but
that does seems to be the consensus reached in a discussion of this:
https://github.com/whatwg/html/issues/2424
The test case I've added here is currently undefined in the spec which
is why I've added it in tests/wpt/mozilla.
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Lazy load fonts in a FontGroup
The first commit message explains this so I'll just copy it here:
---
This is a step towards fixing #17267. To fix that, we need to be able to
try various different fallback fonts in turn, which would become
unweildy with the prior eager-loading strategy.
Prior to this change, FontGroup loaded up all Font instances, including
the fallback font, before any of them were checked for the presence of
the glyphs we're trying to render.
So for the following CSS:
font-family: Helvetica, Arial;
The FontGroup would contain a Font instance for Helvetica, and a Font
instance for Arial, and a Font instance for the fallback font.
It may be that Helvetica contains glyphs for every character in the
document, and therefore Arial and the fallback font are not needed at
all.
This change makes the strategy lazy, so that we'll only create a Font
for Arial if we cannot find a glyph within Helvetica. I've also
substantially refactored the existing code in the process and added
some documentation along the way.
---
I've added some tests in the second commit, but it required quite a bit of gymnastics to make it possible to write such a test. I'm not sure if the added complexity to the production code is worth it?
On the other hand, having this infrastructure in place may be useful for testing future changes in this area, and also possibly brings us a step closer to extracting a library as discussed in #4901. (What I mean by that is: it reduces coupling between `FontCacheThread` and `FontContext` -- the latter would have a place in such a library, the former wouldn't.)
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Unfortunately, this required quite a bit of changes to the non-test
code. That's because FontContext depends on a FontCacheThread, which in
turn depends on a CoreResourceThread and therefore lots of other data
structures.
It seemed like it would be very difficult to instantiate a FontContext
as it was, and even if we could it seems like overkill to have all these
data structures present for a relatively focused test.
Therefore, I created a FontSource trait which represents the interface
which FontContext uses to talk to FontCacheThread. FontCacheThread then
implements FontSource. Then, in the test, we can create a dummy
implementation of FontSource rather than using FontCacheThread.
This actually has the advantage that we can make our dummy
implementation behave in certain specific way which are useful for
testing, for example it can count the number of times
find_font_template() is called, which helps us verify that
caching/lazy-loading is working as intended.
This is a step towards fixing #17267. To fix that, we need to be able to
try various different fallback fonts in turn, which would become
unweildy with the prior eager-loading strategy.
Prior to this change, FontGroup loaded up all Font instances, including
the fallback font, before any of them were checked for the presence of
the glyphs we're trying to render.
So for the following CSS:
font-family: Helvetica, Arial;
The FontGroup would contain a Font instance for Helvetica, and a Font
instance for Arial, and a Font instance for the fallback font.
It may be that Helvetica contains glyphs for every character in the
document, and therefore Arial and the fallback font are not needed at
all.
This change makes the strategy lazy, so that we'll only create a Font
for Arial if we cannot find a glyph within Helvetica. I've also
substantially refactored the existing code in the process and added
some documentation along the way.
enable css paint api and remove forked duplicates
1) Move paintWorklet from "Window" to "CSS" according to new specification;
2) Enable WPT css-paint-api tests from upstream and remove forked duplicates from mozilla folder
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- [X] `./mach test-tidy` does not report any errors
- [X] These changes fix#19840
- [X] These changes do not require tests because the change was made in tests it-selves
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Make FontTemplateData's Debug formatter more concise
Otherwise the log gets spammed with all the individual bytes of the
underlying font file.
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Fix license metadata for servo_arc crate
The header in lib.rs states that this library is MIT / Apache-2.0, since it is forked from the Rust standard library.
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Unlike CSS animations/transitions, script animations keep alive on display:none
elements, so once the display property was changed to others in normal
styling, we need to do styling for the script animations in the second
animation traversal. Otherwise, the styling for the script animations will
be deferred to the next frame.
Fix typo
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I found some typo, so I fixed them.
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style: More serialization tweaks.
This still doesn't fix everything. In particular, we need to check whether the
subproperty will be enabled in Longhands and LonghandsToSerialize too.
I haven't decided yet on what's the best way to do that.
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Minor cleanup of element.innerText
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I looked at what were we doing in that loop, and we're doing tons of dumb stuff.
In particular, we try to serialize the "all" shorthand all the time. This patch
prevents us from trying to serialize shorthands that we've already tried to
serialize.
