This removes some dubious font-family code too.
It ensures that vector longhands have a proper clone implementation
auto-generating it using `collect()`.
Bug: 1461296
Reviewed-by: xidorn
MozReview-Commit-ID: FkdnbTkeF6E
Our implementation is totally not what the spec says, but totally what other
UAs do, see https://github.com/w3c/csswg-drafts/issues/2474.
So given this is causing webcompat pain, I think we should be pragmatic and just
unprefix this.
We could keep serialization and getComputedStyle with ::selection working with a
bit more effort, like we do for :-moz-placeholder, but I'd prefer not doing at
least the serialization bit, and just alias in nsCSSPseudoElements
:-moz-selection to selection too.
Bug: 509958
Reviewed-by: dbaron,xidorn
MozReview-Commit-ID: 6lxctozRDqv
Before this change, if we needed to create a Font which we've already
created, but at a new size, then we'd fetch the FontTemplateInfo again.
If the bytes of the font are held in memory, then this could be
expensive as we need to pass those bytes over IPC.
FontTemplateData gets passed over IPC during the communication between
FontContext and FontCacheThread. Serializing and deserializing these
bytes is expensive, so this change ensures that we only do that when the
bytes can't be read from disk. A similar strategy is already used on
macos and windows.
The performance problem was particularly noticeable after implenting
font fallback, where the content process would potentially work through
a list of fonts, trying to find one which contains a certain glyph. That
could result in lots of font bytes going over IPC.
We can encounter control characters here, for example when processing a
<pre> element which contains newlines. Control characters are inherently
non-printing, therefore if we try to call find_by_codepoint for these
characters we will end up triggering an unnecessary font fallback
search.
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.
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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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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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Revert "Upgrade to rustc 1.27.0-nightly (8a37c75a3 2018-05-02)"
This is causing us to hit a mac bug in rustc that I'm still tracking down and ruining our ability to merge PRs. This works around #20756 until the problem is fixed upstream.
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Replace a boxed iterator with impl Trait
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Generate a frame when a transaction scrolls
This no longer happens automatically in WebRender, so we must do it
manually.
Fixes#20762.
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Don't suppress errors when executing mach bootstrap processes.
[Omitting an argument](https://docs.python.org/2/library/sys.html#sys.exit) to sys.exit causes it to default to 0, so buildbot doesn't report it as an error.
We were just lucky that the android builders happened to have a build step that failed that didn't rely on running python!
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fix(capture_webrender): try fallback capture dir
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This PR try to update behavior of webrender capture to have fallback dir - first it try to create under current working dir, if fails go back to $TMPDIR. I was debating between TMP vs $home, bit hesitate to create some folder under user's home dir directly so choose TMP instead. Can be easily changed, or add few more if needed.
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- locally verified on mac os
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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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0 is not among the valid values for a wrap mode or filter, so it won't
ever be returned unless the driver is broken, and even if it was a
valid value we would want to pass it through.
