This makes the IPC messages a little bigger, but that's unavoidable.
MozReview-Commit-ID: 1oPz2Yjjd9y
--HG--
extra : rebase_source : 0cff8cf5b25f66b73f6864ce50c1e5f575026ec3
Preferences::SetPreference() is used when setting prefs in the content process
from dom::Pref values that are passed from the parent process. Currently we
use the high-level Set*InAnyProcess() methods to do this -- basically the same
code path as sets done via the API -- but this has several problems.
- It is subtly broken. If the content process already has a pref of type T with
a default value and then we get a SetPreference() call that tries to change
it to type U, it will erroneously fail. In practice this never(?) happens,
but it shows that things aren't arranged very well.
- SetPreference() also looks up the hashtable twice to get the same pref if
both a default value and a user value are present in the dom::Pref.
- This happens in content processes, while all other pref set operations occur
in the parent process. This is the main reason we have the Set*InAnyProcess()
functions.
In short, the setting of prefs via IPC is quite different to the setting of
prefs via other means -- because it happens in content processes, and it's more
of a clobber that can set both values at once -- and so should be handled
differently.
The solution is to make Preferences::SetPreference() use lower-level operations
to do the update. It now does the hash table lookup/add itself, and then calls
the new Pref::FromDomPref() method. That method then possibly calls the new
PrefValue::FromDomPrefValue() method for both kinds of value, and overwrites
them as necessary. SetValueFromDom() is no longer used and the patch removes it.
MozReview-Commit-ID: 2Rg8VMOc0Cl
--HG--
extra : rebase_source : 0eddc3a4b694a79af3e173aefa7758f8e2ae776b
And remove the type argument from PrefValue's constructor. This is needed
for the next patch.
MozReview-Commit-ID: Ls8hEU2uRQQ
--HG--
extra : rebase_source : 115828e219f6bbe04677ffc106068a662458481a
The nice thing about this is that the memory management of the strings
(moz_xstrdup() and free()) is now entirely within PrefValue.
MozReview-Commit-ID: KJjnURpmgfE
--HG--
extra : rebase_source : 39c058cddf5ebf9e19f9151f40fd507f6909a289
It's something of an obfuscation, and it forces together various bool values
that don't necessarily have to be together (and won't be together after future
refactorings).
The patch also reorders some function arguments for consistency: PrefType, then
PrefValueKind, then PrefValue.
MozReview-Commit-ID: KNY0Pxo0Nxf
--HG--
extra : rebase_source : d46d228c3b13549b2159757dcdaf9583cca828f7
Although it is a subclass of PLDHashEntryHdr, it's the main representation of a
pref, so the name should reflect that.
MozReview-Commit-ID: 5qJNQtjbFmH
--HG--
extra : rebase_source : f2bd77a57c4e2a48e24ead736f15856fbeb9f718
As is done in pref_SavePrefs().
The confusion here is because a Vector can fill 100% of its capacity, but a
hash table cannot go past 75% of its capacity.
MozReview-Commit-ID: 5JMbmtrxMGN
--HG--
extra : rebase_source : 5ce1ce9dd0259588a0df924c2b45c39497b1ce71
It represents a pref, so `Pref` is a better name. Within Preferences.cpp the
patch uses domPref/aDomPref to distinguish it from PrefHashEntry values.
MozReview-Commit-ID: HXTl0GX4BtO
--HG--
extra : rebase_source : c1e0726c55e7577720f669f0ed2dbc38627d853e
This factors out some common code from SetValue(), making it easier to read.
The patch also improves the comments in SetValue().
MozReview-Commit-ID: 60JnBlIS1q6
--HG--
extra : rebase_source : cc0e47eb556ab87549137777625856db12782702
High resolution, high framerate was disabled by default on old AMD cards on the provisio that it was bad. But this assumes that the CPU decoder could do it better.
This assumption appears fragile at best, as CPU with those old adapter are likely to be old and underpower to start with.
Chrome doesn't appear to restrict use of those cards to a given resolution.
So we disable this restriction, while making it user configurable.
MozReview-Commit-ID: HhADHNR0FdJ
--HG--
extra : rebase_source : ece39cd9b84c6e372d1002ee12e72523cee3d04d
Currently, you can create a pref that only has a user value, and then later
give it a default value with a different type. The entire pref is then recorded
as having this second type. This causes problems later when interpreting the
user value.
This patch makes SetValue() fail if it tries to set a default value whose type
differs from an existing user value. It also expands an existing test to cover
this case and some similar ones.
MozReview-Commit-ID: 89tvISQ7RNT
--HG--
extra : rebase_source : 6cf34da0ff24f5b90a88003445a4a7c88b1f3907
Before bug 1367813, the code in test_stickyprefs.js, using
readUserPrefs, would end up changing the file under which the
preferences service would save user prefs, making xpcshell
possibly overwrite the test data files at the end of the test run.
A hack was put in place to avoid this, that is not required anymore.
--HG--
extra : rebase_source : 6a4b1442c0d1593322226ad162c421df4f9c7f87
This requires adding an aPriority argument (defaulting to false) to
Preferences::RegisterCallback(). And RegisterVarCacheCallback() is no longer
necessary.
MozReview-Commit-ID: BMDk3HuaQVV
--HG--
extra : rebase_source : 17a61cfd9a82f24854162fc993223691041ea46d
