[gtk/wip/exalm/textview-selection: 2/4] textview: Invalidate selection when its style changes

[Alexander Mikhaylenko <alexm src gnome org>]

commit 0fa4b7a24973b275839a2e1585438c3d588c4601
Author: Alexander Mikhaylenko <alexm gnome org>
Date:   Mon May 3 21:40:37 2021 +0500

    textview: Invalidate selection when its style changes

 gtk/gtktextlayout.c        | 14 ++++++++++++++
 gtk/gtktextlayoutprivate.h |  1 +
 gtk/gtktextview.c          |  3 +++
 3 files changed, 18 insertions(+)
---
diff --git a/gtk/gtktextlayout.c b/gtk/gtktextlayout.c
index b31c70799e..85b99661d5 100644
--- a/gtk/gtktextlayout.c
+++ b/gtk/gtktextlayout.c
@@ -833,6 +833,20 @@ gtk_text_layout_invalidate_cursors (GtkTextLayout     *layout,
   gtk_text_layout_invalidated (layout);
 }
 
+void
+gtk_text_layout_invalidate_selection (GtkTextLayout *layout)
+{
+  GtkTextIter selection_start, selection_end;
+
+  g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
+
+  if (layout->buffer &&
+      gtk_text_buffer_get_selection_bounds (layout->buffer,
+                                            &selection_start,
+                                            &selection_end))
+    gtk_text_layout_invalidate (layout, &selection_start, &selection_end);
+}
+
 void
 gtk_text_layout_free_line_data (GtkTextLayout   *layout,
                                 GtkTextLine     *line,
diff --git a/gtk/gtktextlayoutprivate.h b/gtk/gtktextlayoutprivate.h
index 66676c7e7a..480d1ada62 100644
--- a/gtk/gtktextlayoutprivate.h
+++ b/gtk/gtktextlayoutprivate.h
@@ -287,6 +287,7 @@ void gtk_text_layout_invalidate        (GtkTextLayout     *layout,
 void gtk_text_layout_invalidate_cursors(GtkTextLayout     *layout,
                                         const GtkTextIter *start,
                                         const GtkTextIter *end);
+void gtk_text_layout_invalidate_selection (GtkTextLayout  *layout);
 void gtk_text_layout_free_line_data    (GtkTextLayout     *layout,
                                         GtkTextLine       *line,
                                         GtkTextLineData   *line_data);
diff --git a/gtk/gtktextview.c b/gtk/gtktextview.c
index 33c40d3555..2effe3eae2 100644
--- a/gtk/gtktextview.c
+++ b/gtk/gtktextview.c
@@ -5046,6 +5046,9 @@ gtk_text_view_state_flags_changed (GtkWidget     *widget,
 
   gtk_css_node_set_state (priv->selection_node, state);
 
+  if (priv->layout)
+    gtk_text_layout_invalidate_selection (priv->layout);
+
   gtk_widget_queue_draw (widget);
 }