The MOZ_DEBUG_RESTYLE_STRUCTS environment variable can be set to a comma-
separated list of style struct names. When restyle logging is enabled,
this will cause the style context tree -- showing cached style struct
pointers for those structs specified -- to be logged before each
individual restyle is processed. It will also show the struct pointer
values involved when swapping structs between style contexts.
For example, set MOZ_DEBUG_RESTYLE_STRUCTS=Font,UserInterface to show
the cached nsStyleFont and nsStyleUserInterface pointers on the style
contexts involved in the restyle process.
Set the MOZ_DEBUG_RESTYLE environment variable and every restyle will have
detailed logging printed to stderr. By default, restyles for animations are
not logged; you can include them by also setting MOZ_DEBUG_RESTYLE_ANIMATIONS.
If you wish to limit restyle logging to a particular change, you can call
nsPresContext::StartRestyleLogging() and nsPresContext::StopRestyleLogging()
at appropriate points. (You might want to add a couple of helper methods
temporarily on nsIDocument and then expose them to your page with Web IDL
to make them easier to call.) You do not need to have set MOZ_DEBUG_RESTYLE
for this to work.
Set the MOZ_DEBUG_RESTYLE environment variable and every restyle will have
detailed logging printed to stderr. By default, restyles for animations are
not logged; you can include them by also setting MOZ_DEBUG_RESTYLE_ANIMATIONS.
If you wish to limit restyle logging to a particular change, you can call
nsPresContext::StartRestyleLogging() and nsPresContext::StopRestyleLogging()
at appropriate points. (You might want to add a couple of helper methods
temporarily on nsIDocument and then expose them to your page with Web IDL
to make them easier to call.) You do not need to have set MOZ_DEBUG_RESTYLE
for this to work.
Two functions are added:
* HasSameCachedStyleData, which compares a style struct pointer in two
style contexts, and
* HasCachedInheritedStyleData, which checks to see if the bit in mBits
is set.
--HG--
extra : rebase_source : 92f9a42b15fc5537044b033eb960e564196850de
This patch also moves the static methods defined on nsStyleAnimation so that
they are part of StyleAnimationValue class.
Renaming nsStyleAnimation.h to StyleAnimationValue.h is performed in a separate
patch to simplify the diff (since some tools may not handle file renames
elegantly).
This bumps up nsStyleContext::mBits to a uint64_t so that it can fit
another style struct. If we're going to need to keep at least 27 style
structs, it might be better to split mBits up into two uint32_ts: one
for the flags and one for the style struct bits.
Except for the changes in:
layout/generic/nsIFrame.h (part)
layout/style/nsComputedDOMStyle.h (all)
layout/style/nsRuleNode.cpp (part)
layout/style/nsStyleContext.cpp (part)
layout/style/nsStyleContext.h (part)
(see patch 3b in the bug), this patch was written with the sed script:
s/\<GetStyle\(Font\|Color\|List\|Text\|Visibility\|Quotes\|UserInterface\|TableBorder\|SVG\|Background\|Position\|TextReset\|Display\|Content\|UIReset\|Table\|Margin\|Padding\|Border\|Outline\|XUL\|SVGReset\|Column\)\>/Style\1/g
This makes it conform to our convention that getters returning pointers
that can never be null do not begin with "Get".
nsStyleContext's rule node is never null because we require a rule node
in order to construct a style context.
This propagates the non-inherited (in the nsChangeHint sense, not the
CSS inheritance sense) parts of the parent's change hint through
ReResolveStyleContext so that we can use them in
nsStyleContext::CalcDifference. In the cases where we don't know the
parent's hint, we assume the worst, that all the non-inherited hints
were present in the parent's style change.
This should be a significant performance improvement handling simple
style changes (such as a style attribute change setting a non-inherited
property) on elements with large numbers of descendants that have data
in ForceCompare structs that can't be stored in the rule tree (for
example, margins or widths in em or rem units).
