[gnome-builder] libide/sourceview: add duplicate line action

[Christian Hergert <chergert src gnome org>]

commit d55a2b038253fa4ed36292f67ea4b4ce96220701
Author: Christian Hergert <chergert redhat com>
Date:   Mon Sep 5 15:17:36 2022 -0700

    libide/sourceview: add duplicate line action
    
    Fixes #1760

 src/libide/sourceview/gtk/menus.ui      |  5 ++++
 src/libide/sourceview/ide-source-view.c | 50 +++++++++++++++++++++++++++++++++
 2 files changed, 55 insertions(+)
---
diff --git a/src/libide/sourceview/gtk/menus.ui b/src/libide/sourceview/gtk/menus.ui
index 0a07b7ac0..95e9b3548 100644
--- a/src/libide/sourceview/gtk/menus.ui
+++ b/src/libide/sourceview/gtk/menus.ui
@@ -129,6 +129,11 @@
             <attribute name="target" type="(bb)">(false, false)</attribute>
             <attribute name="accel">&lt;shift&gt;&lt;control&gt;j</attribute>
           </item>
+          <item>
+            <attribute name="label" translatable="yes">D_uplicate Line</attribute>
+            <attribute name="action">buffer.duplicate-line</attribute>
+            <attribute name="accel">&lt;control&gt;&lt;alt&gt;d</attribute>
+          </item>
         </section>
         <section id="ide-source-view-popup-menu-format-section">
           <attribute name="page" translatable="yes">Text Editor</attribute>
diff --git a/src/libide/sourceview/ide-source-view.c b/src/libide/sourceview/ide-source-view.c
index b034cd6c9..c1948e820 100644
--- a/src/libide/sourceview/ide-source-view.c
+++ b/src/libide/sourceview/ide-source-view.c
@@ -786,6 +786,54 @@ ide_source_view_action_delete_line (GtkWidget  *widget,
   gdk_clipboard_set_text (gtk_widget_get_primary_clipboard (widget), text);
 }
 
+static void
+ide_source_view_action_duplicate_line (GtkWidget  *widget,
+                                       const char *action_name,
+                                       GVariant   *param)
+{
+  g_autofree char *text = NULL;
+  g_autofree char *duplicate_line = NULL;
+  GtkTextIter begin, end;
+  GtkTextMark *cursor;
+  GtkTextBuffer *buffer;
+  gboolean selected;
+
+  g_assert (IDE_IS_MAIN_THREAD ());
+  g_assert (IDE_IS_SOURCE_VIEW (widget));
+
+  buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (widget));
+  cursor = gtk_text_buffer_get_insert (buffer);
+
+  gtk_text_buffer_begin_user_action (buffer);
+
+  selected = gtk_text_buffer_get_selection_bounds (buffer, &begin, &end);
+
+  if (selected)
+    {
+      duplicate_line = gtk_text_iter_get_text (&begin, &end);
+      gtk_text_buffer_insert (buffer, &begin, duplicate_line, -1);
+    }
+  else
+    {
+      gtk_text_buffer_get_iter_at_mark (buffer, &begin, cursor);
+      end = begin;
+
+      gtk_text_iter_set_line_offset (&begin, 0);
+
+      if (!gtk_text_iter_ends_line (&end))
+        gtk_text_iter_forward_to_line_end (&end);
+
+      if (gtk_text_iter_get_line (&begin) == gtk_text_iter_get_line (&end))
+        {
+          text = gtk_text_iter_get_text (&begin, &end);
+          duplicate_line = g_strconcat (text, "\n", NULL);
+          gtk_text_buffer_insert (buffer, &begin, duplicate_line, -1);
+        }
+    }
+
+  gtk_text_buffer_end_user_action (buffer);
+}
+
 static void
 ide_source_view_dispose (GObject *object)
 {
@@ -955,12 +1003,14 @@ ide_source_view_class_init (IdeSourceViewClass *klass)
   gtk_widget_class_install_action (widget_class, "selection.join", NULL, ide_source_view_selection_join);
   gtk_widget_class_install_action (widget_class, "buffer.select-line", NULL, 
ide_source_view_action_select_line);
   gtk_widget_class_install_action (widget_class, "buffer.delete-line", NULL, 
ide_source_view_action_delete_line);
+  gtk_widget_class_install_action (widget_class, "buffer.duplicate-line", NULL, 
ide_source_view_action_duplicate_line);
 
   gtk_widget_class_add_binding_action (widget_class, GDK_KEY_plus, GDK_CONTROL_MASK, "zoom.in", NULL);
   gtk_widget_class_add_binding_action (widget_class, GDK_KEY_minus, GDK_CONTROL_MASK, "zoom.out", NULL);
   gtk_widget_class_add_binding_action (widget_class, GDK_KEY_0, GDK_CONTROL_MASK, "zoom.one", NULL);
   gtk_widget_class_add_binding_action (widget_class, GDK_KEY_l, GDK_CONTROL_MASK, "buffer.select-line", 
NULL);
   gtk_widget_class_add_binding_action (widget_class, GDK_KEY_d, GDK_CONTROL_MASK, "buffer.delete-line", 
NULL);
+  gtk_widget_class_add_binding_action (widget_class, GDK_KEY_d, GDK_CONTROL_MASK|GDK_ALT_MASK, 
"buffer.duplicate-line", NULL);
 }
 
 static void