Bump exr from 1.5.3 to 1.6.3
Bumps [exr](https://github.com/johannesvollmer/exrs) from 1.5.3 to 1.6.3.
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Split the WPT workflow from the Linux one
This allows running tests for only one layout system at a time. This was
originally part of #29950, but was lost in the shuffle.
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Fix upload of build timings on Windows
Fixes#29948.
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Fix warnings in vendored WebRender
These show up every time one builds, so this adds a patch on top of our
vendored copy of WebRender to fix these errors for now.
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Make Layout 2020/2013 a runtime switch
This change makes the choice between Layout 2020 and Layout
2013 a runtime switch. The main part of the patch is removing all layout
related compile-time flags from the style crate. This makes the style crate a
lot simpler, but now Layout 2020 parses a good deal of features that it doesn't
support (table, vertical-align, etc). The good news is that we plan to add
these features to Layout 2020.
- Compile a single style for both Layout 2020 and Layout 2013
- Remove layout_2020/layout_2013 features
- Update GitHub workflows for single compilation
- Update test results
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Remove UWP / Hololens support
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Collect android build setup into two methods
This is small refactor which tries to isolate all of the Android setup
into a couple methods, so that it is easier to reason about in the
scripts. This doesn't change any behavior but does fix a few small
linting errors in the existing code.
Note: The Android build is currently broken and this change doesn't fix
it. It shouldn't break it any more though.
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Remove some debugging code in vendored WebRender
This slipped in when importing the source code.
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This is small refactor which tries to isolate all of the Android setup
into a couple methods, so that it is easier to reason about in the
scripts. This doesn't change any behavior but does fix a few small
linting errors in the existing code.
Note: The Android build is currently broken and this change doesn't fix
it. It shouldn't break it any more though.
Vendor the current version of WebRender
This is a step toward upgrading WebRender, which will be upgraded and
patched in the `third_party` directory. This change vendors the current
private branch of WebRender that we use and adds a `patches` directory
which tracks the changes on top of the upstream WebRender commit
described by third_party/webrender/patches/head.
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When using "try-<platform>" trigger unit tests
There is currently no way to trigger unit tests using the bors-servo try
infrastructure. This change makes it so that using try-<platform>
triggers unit tests for that platform. This will be especially useful
when testing changes for Windows before trying to land them.
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Run main workflow for merge queue events
This PR configures the main workflow (currently used by bors via auto & try branches) to run
on 'merge_group' events emitted when pull requests are added to GitHub merge queue.
---
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- [ ] These changes fix #___ (GitHub issue number if applicable)
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This PR configures the main workflow (currently
used by bors via auto & try branches) to run
on 'merge_group' events emitted when pull requests
are added to GitHub merge queue.
Signed-off-by: Mukilan Thiyagarajan <me@mukilan.in>
There is currently no way to trigger unit tests using the bors-servo try
infrastructure. This change makes it so that using try-<platform>
triggers unit tests for that platform. This will be especially useful
when testing changes for Windows before trying to land them.
Windows bootstrap support
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- [x] These changes fix#25224
- [x] These changes do not require tests because they are just support script changes.
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This is a step toward upgrading WebRender, which will be upgraded and
patched in the `third_party` directory. This change vendors the current
private branch of WebRender that we use and adds a `patches` directory
which tracks the changes on top of the upstream WebRender commit
described by third_party/webrender/patches/head.
Split layout_in_flow_non_replaced_block_level
This function is already quite big and the changes necessary for
properly laying out independent formatting contexts next to floats will
make it even more unwieldy. Split the function in two and add a helper
for calculating the containing block for children and the margin. As
time goes on the independent formatting case is probably going to be
more like the replaced case anyway.
Co-authored-by: Oriol Brufau <obrufau@igalia.com>
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This function is already quite big and the changes necessary for
properly laying out independent formatting contexts next to floats will
make it even more unwieldy. Split the function in two and add a helper
for calculating the containing block for children and the margin. As
time goes on the independent formatting case is probably going to be
more like the replaced case anyway.
Co-authored-by: Oriol Brufau <obrufau@igalia.com>
Layout 2020: Optimize collapsible margin lookahead
Every time that we would lay out a block box that could collapse its top margin with its contents, we would do a lookahead to compute the resulting margin in order to place floats correctly.
The problem is that this lookahead could iterate several descendants, but then when laying these we would run the lookahead again.
This patch restricts the lookahead to boxes that either aren't collapsing their top margin with their parent, or that have 'clear' different than 'none' (since clearance prevents collapsing margins with the parent).
Since the lookahead stops iterating when it finds a box that doesn't collapse its top margin with its parent, or whose 'clear' isn't 'none', this should ensure that lookahead never handles the same box twice.
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Every time that we would lay out a block box that could collapse its
top margin with its contents, we would do a lookahead to compute the
resulting margin in order to place floats correctly.
The problem was that this lookahead could iterate several descendants,
but then when laying these we would run the lookahead again.
This patch restricts the lookahead to boxes that either aren't collapsing
their top margin with their parent, or that have 'clear' different than
'none' (since clearance prevents collapsing margins with the parent).
Since the lookahead stops iterating when it finds a box that doesn't
collapse its top margin with its parent, or whose 'clear' isn't 'none',
this should ensure that lookahead never handles the same box twice.
Update mozangle
This should allow servo to take advantage of faster compilation times on Windows.
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Check computed (min-)block-size when determining margin collapse
To collapse margins through, CSS2 requires "zero or auto computed height" and "zero computed min-height" (the latter should also also include auto, which was introduced in CSS3 as the new initial value).
Similarly, "auto computed height" is required to collapse the bottom margin with the bottom margin of the contents.
Therefore this patch stops collapsing when the used height is clamped to zero by max-height, but the computed value is not zero. Same for non-zero percentages that are indefinite or that resolve to 0px.
Note that 0% and calc(0% + 0px) are still considered to be zero (so they allow margin collapse), this may a bit inconsistent but matches Firefox (for the collapsing through case).
This also matches the heuristics in find_block_margin_collapsing_with_parent(). We could change the heuristics instead, but then they would have to track block sizes in order to be able to resolve percentages.
The change makes margin-collapse-through-percentage-height-block.html fail, that test is only passing on Blink, which did a different interpretation of the spec. To be fair, various places of CSS2 loosely consider that indefinite percentages compute to auto, and even Firefox does so when determining whether to collapse the top margin with the contents.
Since the spec isn't particularly clear and interoperability is lacking, I filed https://github.com/w3c/csswg-drafts/issues/8919.
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- [X] These changes fix#29907
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Set the Windows subsystem using a rust directive
This is one less thing that mach has to do now.
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Resolve percentages in find_block_margin_collapsing_with_parent
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Padding percentages weren't being resolved, this function would think
that margins wouldn't collapse even if the percentage resolved to 0px.
And margin percentages were always resolved to 0px.
So now the function takes a ContainingBlock parameter that is used to
resolve these percentages properly.
---
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Remove unused variable
Just a remnant from #29850, it was causing a build warning.
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Padding percentages weren't being resolved, this function would think
that margins wouldn't collapse even if the percentage resolved to 0px.
And margin percentages were always resolved to 0px.
So now the function takes a ContainingBlock parameter that is used to
resolve these percentages properly.
To collapse margins through, CSS2 requires "zero or auto computed height"
and "zero computed min-height" (the latter should also also include auto,
which was introduced in CSS3 as the new initial value).
Similarly, "auto computed height" is required to collapse the bottom margin
with the bottom margin of the contents.
Therefore this patch stops collapsing when the used height is clamped
to zero by max-height, but the computed value is not zero. Same for
non-zero percentages that are indefinite or that resolve to 0px.
Note that 0% and calc(0% + 0px) are still considered to be zero (so they
allow margin collapse), this may a bit inconsistent but matches Firefox
(for the collapsing through case).
This also matches the heuristics in find_block_margin_collapsing_with_parent().
We could change the heuristics instead, but then they would have to track
block sizes in order to be able to resolve percentages.
The change makes margin-collapse-through-percentage-height-block.html fail,
that test is only passing on Blink, which did a different interpretation
of the spec. To be fair, various places of CSS2 loosely consider that
indefinite percentages compute to auto, and even Firefox does so when
determining whether to collapse the top margin with the contents.
Since the spec isn't particularly clear and interoperability is lacking,
I filed https://github.com/w3c/csswg-drafts/issues/8919.
Layout 2020: Properly calculate clearance
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calculate_clearance() was not taking into account that adding clearance prevents top margin from collapsing with earlier margins.
---
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- [X] These changes fix#29885 and #29919
- [X] There are tests for these changes
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CSS viewport removal
It was removed from the spec and it's disabled everywhere.
This also removes the meta viewport support (which was implemented on top), but that also had a single test and is disabled everywhere, so I'm not too concerned, it can be implemented again if / when needed.
- [x] `./mach build -d` does not report any errors
- [x] `./mach test-tidy` does not report any errors
- [x] These changes fix#26349
- [x] There are tests for these changes
layout_2020: Do linebreak for atomic inline-level elements
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- [x] These changes fix#29591 (GitHub issue number if applicable)
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This also removes the meta viewport support (which was implemented on top), but that also had a single test and is disabled everywhere, so I'm not too concerned, it can be implemented again if / when needed.
Create a top-level "third_party" directory
This directory now contains third_party software that is vendored into
the Servo source tree. The idea is that it would eventually hold
webrender and other crates from mozilla-central as well with a standard
patch management approach for each.
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- [x] `./mach build -d` does not report any errors
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- [x] These changes do not require tests because this should not change behavior.
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This directory now contains third_party software that is vendored into
the Servo source tree. The idea is that it would eventually hold
webrender and other crates from mozilla-central as well with a standard
patch management approach for each.
