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textview: Implement gtk_accessible_text_get_extents

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There is some question if this needs to be clipped to widget extents
- if the textview is in a scrolled window, we can easily return
extents here that go beyond the window or event the screen.
This commit is contained in:
Matthias Clasen 2024-03-10 15:20:20 -04:00
parent 47ec7bc66d
commit 19a168446e
1 changed files with 49 additions and 0 deletions
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49
gtk/gtktextview.c
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@ -10685,6 +10685,54 @@ gtk_text_view_accessible_text_get_default_attributes (GtkAccessibleText *self,
g_hash_table_unref (attrs);
}
static gboolean
gtk_text_view_accessible_text_get_extents (GtkAccessibleText *self,
unsigned int start,
unsigned int end,
graphene_rect_t *extents)
{
GtkTextBuffer *buffer;
GtkTextIter start_iter, end_iter;
cairo_region_t *region;
GdkRectangle rect;
buffer = get_buffer (GTK_TEXT_VIEW (self));
gtk_text_buffer_get_iter_at_offset (buffer, &start_iter, start);
gtk_text_buffer_get_iter_at_offset (buffer, &end_iter, end);
region = cairo_region_create ();
do
{
gtk_text_view_get_iter_location (GTK_TEXT_VIEW (self), &start_iter, &rect);
cairo_region_union_rectangle (region, &rect);
gtk_text_iter_forward_to_line_end (&start_iter);
gtk_text_iter_order (&start_iter, &end_iter);
gtk_text_view_get_iter_location (GTK_TEXT_VIEW (self), &end_iter, &rect);
cairo_region_union_rectangle (region, &rect);
gtk_text_iter_forward_line (&start_iter);
}
while (gtk_text_iter_compare (&start_iter, &end_iter) < 0);
cairo_region_get_extents (region, &rect);
cairo_region_destroy (region);
gtk_text_view_buffer_to_window_coords (GTK_TEXT_VIEW (self),
GTK_TEXT_WINDOW_TEXT,
rect.x, rect.y,
&rect.x, &rect.y);
_text_window_to_widget_coords (GTK_TEXT_VIEW (self), &rect.x, &rect.y);
extents->origin.x = rect.x;
extents->origin.y = rect.y;
extents->size.width = rect.width;
extents->size.height = rect.height;
return TRUE;
}
static void
gtk_text_view_accessible_text_init (GtkAccessibleTextInterface *iface)
{
@ -10694,6 +10742,7 @@ gtk_text_view_accessible_text_init (GtkAccessibleTextInterface *iface)
iface->get_selection = gtk_text_view_accessible_text_get_selection;
iface->get_attributes = gtk_text_view_accessible_text_get_attributes;
iface->get_default_attributes = gtk_text_view_accessible_text_get_default_attributes;
iface->get_extents = gtk_text_view_accessible_text_get_extents;
}
/* }}} */