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| author | Christian Hergert <chergert@redhat.com> | 2020-08-07 11:45:28 -0700 |
|---|---|---|
| committer | Christian Hergert <chergert@redhat.com> | 2020-08-07 11:45:28 -0700 |
| commit | def05ef87c43bd40ff18d964ac200ab5675a3ae2 (patch) | |
| tree | ed5b2e50f6f7031ca6576999fadc8d44ec4b8e57 | |
| parent | cd0b9a2359275f320301705a4aaa0a8d1c4483ec (diff) | |
| download | gtk+-wip/chergert/special-case-displaycache-y-is-zero.tar.gz | |
linedisplaycache: special case left-most binary searchwip/chergert/special-case-displaycache-y-is-zero
If we have a y index of 0, we always want to look at the left-most
position instead of wasting time on a binary search for edges. This is an
extremely common case when loading or syntax highlighting a buffer such
as from GtkSourceView.
| -rw-r--r-- | gtk/gtktextlinedisplaycache.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/gtk/gtktextlinedisplaycache.c b/gtk/gtktextlinedisplaycache.c index 91ce0d98e4..65835ba6bd 100644 --- a/gtk/gtktextlinedisplaycache.c +++ b/gtk/gtktextlinedisplaycache.c @@ -596,6 +596,18 @@ find_iter_at_at_y (GtkTextLineDisplayCache *cache, g_assert (!g_sequence_iter_is_end (left)); g_assert (!g_sequence_iter_is_end (right)); + /* One of the most common cases is y==0, so special case it. */ + if (y == 0) + { + GtkTextLineDisplay *display = g_sequence_get (left); + + g_assert (display != NULL); + g_assert (display->line != NULL); + + if (_gtk_text_btree_find_line_top (btree, display->line, layout) <= 0) + return left; + } + for (;;) { GtkTextLineDisplay *display; |