We should not be declaring forward declarations for nsString classes directly,
instead we should use nsStringFwd.h. This will make changing the underlying
types easier.
--HG--
extra : rebase_source : b2c7554e8632f078167ff2f609392e63a136c299
Conceptually, a repaint request that arrives in APZCCallbackHelper with
!GetScrollOffsetUpdated() is a repaint request that the APZ is sending in
response to a main-thread update it received. The purpose of the repaint
request is mainly to update the displayport margins; the scroll position
and resolution should not have changed. Therefore actively trying to set
the scroll position or resolution as a result of these repaint requests
should at best be a no-op but often triggers unnecessary clobbering of things
that are in-flight, or extra reflows. This can result in buggy behaviour.
Bug 1286179 avoided doing this for the scroll position, and this patch does
the equivalent thing for zooming.
MozReview-Commit-ID: 91RbRP0ZHBe
--HG--
extra : rebase_source : 7bb97075619f5435705d369a695d37aa1c972278
This patch adds a new tolerance pref, which controls how far the second touchdown
is allowed to be from the first touchdown when detecting a multi-tap gesture
such as double-tap or one-touch-pinch. This stops the one-touch-pinch code
from inadvertently triggering when the user does a tap followed by a second tap
far away from the first.
The default value for the new pref is 5x the touch-start tolerance pref. This
seems to provide a reasonable behaviour for me, although this value could
probably be tuned.
MozReview-Commit-ID: 63aAyGCbvoN
--HG--
extra : rebase_source : 36e9bd66d165c8d746ea7b5d6c33e9cf2771194a
Recording mask clips in the clip stack changes the value of TopmostClipId()
which confuses the code in ScrollingLayersHelper. The mask clip can be
thought of as an "out-of-band" clip that ScrollingLayersHelper doesn't
need to know about. This patch adds a mechanism for pushing such
"out-of-band" clips without touching the clip stack.
MozReview-Commit-ID: 8Zeqtigk0cj
--HG--
extra : rebase_source : 35176f3c9d98d186f78d7a0ff44845c7c3c9f67e
This replaces our DrawTargetCapture hack with a similar but more powerful TextDrawTarget
hack. The old design had several limitations:
* It couldn't handle shadows
* It couldn't handle selections
* It couldn't handle font/color changes in a single text-run
* It couldn't handle decorations (underline, overline, line-through)
Mostly this was a consequence of the fact that it only modified the start and end
of the rendering algorithm, and therefore couldn't distinguish draw calls for different
parts of the text.
This new design is based on a similar principle as DrawTargetCapture, but also passes
down the TextDrawTarget in the drawing arguments, so that the drawing algorithm can
notify us of changes in phase (e.g. "now we're doing underlines"). This also lets us
directly pass data to TextDrawTarget when possible (as is done for shadows and selections).
In doing this, I also improved the logic copied from ContainsOnlyColoredGlyphs to handle
changes in font/color mid-text-run (which can happen because of font fallback).
The end result is:
* We handle all shadows natively
* We handle all selections natively
* We handle all decorations natively
* We handle font/color changes in a single text-run
* Although we still hackily intercept draw calls
* But we don't need to buffer commands, reducing total memcopies
In addition, this change integrates webrender's PushTextShadow and PushLine APIs,
which were designed for this use case. This is only done in the layerless path;
WebrenderTextLayer continues to be semantically limited, as we aren't actively
maintaining non-layers-free webrender anymore.
This also doesn't modify TextLayers, to minimize churn. In theory they can be
augmented to support the richer semantics that TextDrawTarget has, but there's
little motivation since the API is largely unused with this change.
MozReview-Commit-ID: 4IjTsSW335h
--HG--
extra : rebase_source : d69f69648ade5c7a8e6bb756f4b8ab9e2543e576
This patch takes the existing code (which allows recursively pushing the necessary
part of a clip chain) and folds it into another recursive function that
operates on the ASR chain. Now the ASR recursion is the primary one, and
clips are pushed for each ASR as needed.
This code was partly modelled after the code in
ContainerState::SetupScrollingMetadata, which also iterates over the
ASRs and clips.
MozReview-Commit-ID: 1qaFPY7Ja7
--HG--
extra : rebase_source : 623b116c293e86d063e5acfa4a01f5104719f560
