This reworks bug 1440561 so that we only precompute loads that belong to our
user font set, avoiding messing up with fonts in the cache that belong to other
pages.
The loadability of a font is precomputed in PreTraverse in the same way as we
did, but only for the fonts that we may end up loading. This is stored in
FontFaceSet now.
Also, the principal shenanigans that this code did are reworked to be explicit
about when the document principal changes in ResetToURI, instead of having a
member around and a mutable variable. This makes the code easier to follow.
MozReview-Commit-ID: 9ofTbaLDUF7
Handling a document's node principal changing is done in part 9.
MozReview-Commit-ID: 1gPtRpddys5
--HG--
extra : rebase_source : f0b4d07481ae7215117b86c474f14658b61d6f06
Handling a document's node principal changing is done in part 9.
MozReview-Commit-ID: 1gPtRpddys5
--HG--
extra : rebase_source : def889e9ae4a428ccc02f9b5ac18f2ce640dc652
Handling a document's node principal changing is done in part 9.
MozReview-Commit-ID: 1gPtRpddys5
--HG--
extra : rebase_source : 5b1d40af5ad0484440075e7229dc9ae3d5a13764
Here we add a new UserFontLoadState value, STATUS_LOAD_PENDING, which
represents the state just after a gfxUserFontEntry's url()-valued source
would being loading, except that we can't start the load due to being
on a Servo style worker thread. In that case, we defer the work of
initiating the load until just after the Servo traversal is finished.
URLs that can normally be loaded synchronously, such as data: URLs
and script-implemented protocols marked as synchronous, must be
handled asynchronously when encountered during Servo traversal, since
various main-thread only work (in FontFaceSet::SyncLoadFontData) must
happen. This is a user visible change from stock Gecko, but should
only happen when font metrics for a data: URL font are requested
due to ch/ex unit resolution when layout hasn't previously requested
the font load. Hopefully nobody relies on synchronous resolution of
ch/ex units with data: URLs.
We unfortunately also can't pick gfxUserFontEntry objects out of the
UserFontCache during Servo traversal, since validating the cache
entry involves doing content policy checking, which is not thread-safe
(due in part to taking strong references to nsIPrincipals).
Platform fonts and ArrayBuffer-backed DOM FontFace objects continue
to be handled synchronously.
The PostTraversalTask does not take a strong reference to the
gfxUserFontEntry object, since it is held on to by the DOM FontFace
object, which itself won't go away before the PostTraversalTask
is run.
MozReview-Commit-ID: J9ODLsusrNV
--HG--
extra : rebase_source : d3e3d1dc187cb252750b57bcecd0b1ed77a15a7c
As with a few other gfx* font-related classes, during font metrics
calculations we end up taking strong references to gfxUserFontSet,
and it would be difficult to restructure the code to not do this.
MozReview-Commit-ID: L1GbZnf4825
--HG--
extra : rebase_source : 3bc2deb24e282f4a76f0a270d28771016052f9ec
Here we add a new UserFontLoadState value, STATUS_LOAD_PENDING, which
represents the state just after a gfxUserFontEntry's url()-valued source
would being loading, except that we can't start the load due to being
on a Servo style worker thread. In that case, we defer the work of
initiating the load until just after the Servo traversal is finished.
URLs that can normally be loaded synchronously, such as data: URLs
and script-implemented protocols marked as synchronous, must be
handled asynchronously when encountered during Servo traversal, since
various main-thread only work (in FontFaceSet::SyncLoadFontData) must
happen. This is a user visible change from stock Gecko, but should
only happen when font metrics for a data: URL font are requested
due to ch/ex unit resolution when layout hasn't previously requested
the font load. Hopefully nobody relies on synchronous resolution of
ch/ex units with data: URLs.
We unfortunately also can't pick gfxUserFontEntry objects out of the
UserFontCache during Servo traversal, since validating the cache
entry involves doing content policy checking, which is not thread-safe
(due in part to taking strong references to nsIPrincipals).
Platform fonts and ArrayBuffer-backed DOM FontFace objects continue
to be handled synchronously.
The PostTraversalTask does not take a strong reference to the
gfxUserFontEntry object, since it is held on to by the DOM FontFace
object, which itself won't go away before the PostTraversalTask
is run.
MozReview-Commit-ID: J9ODLsusrNV
--HG--
extra : rebase_source : 1651e2917bd31b87fc1c1be94b0eced1273df86a
As with a few other gfx* font-related classes, during font metrics
calculations we end up taking strong references to gfxUserFontSet,
and it would be difficult to restructure the code to not do this.
MozReview-Commit-ID: L1GbZnf4825
--HG--
extra : rebase_source : bfd83b02cceec747dc4f4f021eff205e7aaa2b69
Since font-language-override can only have a single three-letter tag, and it is
eventually converted to uint32_t while creating gfxFontStyle, we should be able
to move the conversion ahead, to an earlier stage.
In this patch, we move the ParseFontLanguageOverride to nsRuleNode, so we could
do the nsString-to-uint32_t conversion during computing time.
MozReview-Commit-ID: LA4Bv3wV7K
--HG--
extra : rebase_source : 48059a9913d58363f78dea59b1b7811d9f038352
This patch removes checking of all the callback calls in memory reporter
CollectReport() functions, because it's not useful.
The patch also does some associated clean-up.
- Replaces some uses of nsIMemoryReporterCallback with the preferred
nsIHandleReportCallback typedef.
- Replaces aCallback/aCb/aClosure with aHandleRepor/aData for CollectReports()
parameter names, for consistency.
- Adds MOZ_MUST_USE/[must_use] in a few places in nsIMemoryReporter.idl.
- Uses the MOZ_COLLECT_REPORT macro in all suitable places.
Overall the patch reduces code size by ~300 lines and reduces the size of
libxul by about 37 KiB on my Linux64 builds.
--HG--
extra : rebase_source : e94323614bd10463a0c5134a7276238a7ca1cf23
Cosmin Sabou
Jonathan Kew
Jonathan Watt
Emilio Cobos Álvarez
Cameron McCormack
Nathan Froyd
Sebastian Hengst
Bobby Holley
Carsten "Tomcat" Book
Iris Hsiao
Manish Goregaokar
Jeremy Chen
Jeff Muizelaar
Nicholas Nethercote