Commit Graph

9 Commits

Author SHA1 Message Date
Matthias Clasen
5cbc55578f textview: Update child allocations
This was accidentally lost when display line caching
was introduced.
2020-10-28 20:18:54 -04:00
Christian Hergert
35325ea11a linedisplaycache: improve invalidation with y_range
When we invalidate a y_range using the common pattern of y==0 and
old_height==new_height, we are generally invalidating the entire buffer.

This short-circuits that case to just invalidate the buffer in a faster
and more complete form. The problem here appears to be that we can't
always calculate the ranges properly to invalidate because validation
has not run far enough.
2020-08-07 12:44:26 -07:00
Christian Hergert
94d17a6809 textlinedisplaycache: short-circuit y_range invalidation
If we have a y==-1 then we are generally invalidating the whole textview.
For this case, we can just discard the entire GtkTextLineDisplay cache.

Fixes #2975
2020-08-02 16:35:50 -07:00
Benjamin Otte
d7266b25ba Replace "gint" with "int" 2020-07-25 00:47:36 +02:00
Christian Hergert
e4a00f864d textview: fix off-by-one in y_range invalidation
Previously, with selection bounds, we could have a state where a line
display with selections set would eroniously stay in the cache. This
aggresively releases those at the boundary cases fixing deselection
drawing state.
2019-10-09 10:43:34 -07:00
Christian Hergert
3b959456ac textview: cache paragraph render nodes
We can avoid recreating a number of text nodes from render_para() on
sub-sequent runs if we cache the rendernode instead of just the
PangoLayout.

When used with GtkSourceMap, this can yield a ~7 FPS improvement during
smooth scrolling at the cost of some more memory.
2019-10-08 11:44:27 -07:00
Christian Hergert
5e49da1d73 textview: optimize linedisplay cache based on number of visible rows
This tries to estimate the number of visible rows in a textview based on
the default text size and then tunes the GtkTextLineDisplayCache to keep
3*n_rows entries in the cache.

This was found imperically to be near the right cache size. In most cases,
this is less than the number of items we cache now. However, in some cases,
such as the "overview map" from GtkSourceView, it allows us to reach a
higher value such as 1000+. This is needed to keep scrolling smooth on
the larger view sizes.

With this patch, a HiDPI system with a GtkSourceView and GtkSourceMap
from the GTK 4 port can perform smooth scrolling simultaneously.
2019-09-05 19:06:35 -07:00
Christian Hergert
4ae362d138 textview: clear cached entries before releasing containers
We want to ensure all of the display cache entries are released in the
normal fashion before releasing the structures so that we can maintain
the invariant that cache_iter will always exist while in the cache.
2019-08-09 12:52:16 -07:00
Christian Hergert
9926e6ebde textlayout: introduce caching for GtkTextLineDisplay
This adds a GtkTextLineDisplayCache which can be used to cache a number
of GtkTextLineDisplay (and thus, PangoLayout) while displaying a view.

It uses a GSequence to track the position of the GtkTextLineDisplay
relative to each other, a MRU to cull the least recently used display,
and and a direct hashtable to lookup display by GtkTextLine.

We only cache lines that are to be displayed (!size_only). We may want to
either create a second collection of "size_only" lines to speed that up,
or determine that it is unnecessary (which is likely the case).
2019-07-28 10:34:15 -07:00