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textlayout: make GtkTextLineDisplay reference counted

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This makes GtkTextLineDisplay use GRcBox instead of g_slice_*
directly. By using reference counting for this structure, we
can ensure that we hold an extra ref for one_display_cache as
well as caching additional GtkTextLineDisplay for the visible
range in the future.
This commit is contained in:
Christian Hergert 2019-07-23 14:52:14 -07:00
parent fb06b7fa94
commit e0b9b51e9f
2 changed files with 35 additions and 29 deletions
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62
gtk/gtktextlayout.c
View File

@ -197,12 +197,7 @@ gtk_text_layout_dispose (GObject *object)
g_clear_object (&layout->ltr_context);
g_clear_object (&layout->rtl_context);
if (layout->one_display_cache)
{
GtkTextLineDisplay *tmp_display = layout->one_display_cache;
layout->one_display_cache = NULL;
gtk_text_layout_free_line_display (layout, tmp_display);
}
g_clear_pointer (&layout->one_display_cache, gtk_text_line_display_unref);
if (layout->preedit_attrs != NULL)
{
@ -826,20 +821,17 @@ gtk_text_layout_invalidate_cache (GtkTextLayout *layout,
{
if (layout->one_display_cache && line == layout->one_display_cache->line)
{
GtkTextLineDisplay *display = layout->one_display_cache;
if (cursors_only)
{
if (display->cursors)
g_array_free (display->cursors, TRUE);
display->cursors = NULL;
GtkTextLineDisplay *display = layout->one_display_cache;
g_clear_pointer (&display->cursors, g_array_unref);
display->cursors_invalid = TRUE;
display->has_block_cursor = FALSE;
}
else
{
layout->one_display_cache = NULL;
gtk_text_layout_free_line_display (layout, display);
g_clear_pointer (&layout->one_display_cache, gtk_text_line_display_unref);
}
}
}
@ -2287,19 +2279,17 @@ gtk_text_layout_get_line_display (GtkTextLayout *layout,
{
if (!size_only)
update_text_display_cursors (layout, line, layout->one_display_cache);
return layout->one_display_cache;
return gtk_text_line_display_ref (layout->one_display_cache);
}
else
{
GtkTextLineDisplay *tmp_display = layout->one_display_cache;
layout->one_display_cache = NULL;
gtk_text_layout_free_line_display (layout, tmp_display);
g_clear_pointer (&layout->one_display_cache, gtk_text_line_display_unref);
}
}
DV (g_print ("creating one line display cache (%s)\n", G_STRLOC));
display = g_slice_new0 (GtkTextLineDisplay);
display = g_rc_box_new0 (GtkTextLineDisplay);
display->size_only = size_only;
display->line = line;
@ -2619,7 +2609,9 @@ gtk_text_layout_get_line_display (GtkTextLayout *layout,
if (tags != NULL)
g_ptr_array_free (tags, TRUE);
layout->one_display_cache = display;
g_assert (layout->one_display_cache == NULL);
layout->one_display_cache = gtk_text_line_display_ref (display);
if (saw_widget)
allocate_child_widgets (layout, display);
@ -2627,20 +2619,32 @@ gtk_text_layout_get_line_display (GtkTextLayout *layout,
return display;
}
static void
gtk_text_line_display_finalize (GtkTextLineDisplay *display)
{
g_clear_object (&display->layout);
g_clear_pointer (&display->cursors, g_array_unref);
}
GtkTextLineDisplay *
gtk_text_line_display_ref (GtkTextLineDisplay *display)
{
return g_rc_box_acquire (display);
}
void
gtk_text_line_display_unref (GtkTextLineDisplay *display)
{
g_rc_box_release_full (display, (GDestroyNotify)gtk_text_line_display_finalize);
}
/* For compat until we switch away from this */
void
gtk_text_layout_free_line_display (GtkTextLayout *layout,
GtkTextLineDisplay *display)
{
if (display != layout->one_display_cache)
{
if (display->layout)
g_object_unref (display->layout);
if (display->cursors)
g_array_free (display->cursors, TRUE);
g_slice_free (GtkTextLineDisplay, display);
}
if (display != NULL)
gtk_text_line_display_unref (display);
}
/* Functions to convert iter <=> index for the line of a GtkTextLineDisplay

2
gtk/gtktextlayoutprivate.h
View File

@ -300,6 +300,8 @@ GtkTextLineDisplay* gtk_text_layout_get_line_display (GtkTextLayout *layou
gboolean size_only);
void gtk_text_layout_free_line_display (GtkTextLayout *layout,
GtkTextLineDisplay *display);
GtkTextLineDisplay *gtk_text_line_display_ref (GtkTextLineDisplay *display);
void gtk_text_line_display_unref (GtkTextLineDisplay *display);
void gtk_text_layout_get_line_at_y (GtkTextLayout *layout,
GtkTextIter *target_iter,