Added JoinLines plugin. Removed logic to split lines. Moved Join Line shortcut from Layout to Editing section.

plugins/joinlines/joinlines.plugin.desktop.in

@@ -0,0 +1,12 @@
+[Plugin]
+Loader=python3
+Module=joinlines
+IAge=3
+_Name=Join Lines
+_Description=Join several lines
+Icon=gnome-mime-text-x-python
+Authors=Steve Frécinaux <steve@istique.net>;André Homeyer;Linux Mint team
+Copyright=Copyright @ 2006-2007 Steve Frécinaux, André Homeyer
+Website=https://github.com/linuxmint
+Builtin=true
+

plugins/joinlines/joinlines/__init__.py

@@ -0,0 +1,91 @@
+from gi.repository import GObject, Gtk, Xed
+
+import gettext
+gettext.install("xed")
+
+MENU_PATH = "/MenuBar/ViewMenu/ViewOps_1"
+
+class JoinLinesPlugin(GObject.Object, Xed.WindowActivatable):
+    __gtype_name__ = "JoinLinesPlugin"
+
+    window = GObject.property(type=Xed.Window)
+
+    def __init__(self):
+        GObject.Object.__init__(self)
+
+    def do_activate(self):
+        self._views = {}
+
+        self._insert_menu()
+
+    def _insert_menu(self):
+        manager = self.window.get_ui_manager()
+
+        self._action_group = Gtk.ActionGroup(name="XedJoinLinesPluginActions")
+        self._action_group.add_actions(
+            [("JoinLinesAction", None, _("_Join Lines"), "<Ctrl>J",
+              _("Join the selected lines"),
+              lambda w: self.join_lines(w))])
+
+        manager.insert_action_group(self._action_group)
+
+        self._ui_id = manager.new_merge_id()
+
+        manager.add_ui(self._ui_id,
+                       MENU_PATH,
+                       "JoinLinesAction",
+                       "JoinLinesAction",
+                       Gtk.UIManagerItemType.MENUITEM,
+                       False)
+
+    def do_update_state(self):
+        self._action_group.set_sensitive(self.window.get_active_document() != None)
+
+    def do_deactivate(self):
+        self._remove_menu()
+
+
+    def _remove_menu(self):
+        manager = self.window.get_ui_manager()
+        manager.remove_ui(self._ui_id)
+        manager.remove_action_group(self._action_group)
+        manager.ensure_update()
+
+    def join_lines(self, w):
+        doc = self.window.get_active_document()
+        if doc is None:
+            return
+
+        doc.begin_user_action()
+
+        # If there is a selection use it, otherwise join the
+        # next line
+        try:
+            start, end = doc.get_selection_bounds()
+        except ValueError:
+            start = doc.get_iter_at_mark(doc.get_insert())
+            end = start.copy()
+            end.forward_line()
+
+        end_mark = doc.create_mark(None, end)
+
+        if not start.ends_line():
+            start.forward_to_line_end()
+
+        # Include trailing spaces in the chunk to be removed
+        while start.backward_char() and start.get_char() in ('\t', ' '):
+            pass
+        start.forward_char()
+
+        while doc.get_iter_at_mark(end_mark).compare(start) == 1:
+            end = start.copy()
+            while end.get_char() in ('\r', '\n', ' ', '\t'):
+                end.forward_char()
+            doc.delete(start, end)
+
+            doc.insert(start, ' ')
+            start.forward_to_line_end()
+
+        doc.delete_mark(end_mark)
+        doc.end_user_action()
+

plugins/joinlines/meson.build

@@ -0,0 +1,13 @@
+install_subdir(
+    'joinlines',
+    install_dir: pluginslibdir
+)
+
+textsize_desktop = custom_target(
+    'joinlines_desktop',
+    input: 'joinlines.plugin.desktop.in',
+    output: 'joinlines.plugin',
+    command: [intltool_merge, '-d', '-u', po_dir, '@INPUT@', '@OUTPUT@'],
+    install: true,
+    install_dir: pluginslibdir,
+)

plugins/meson.build

@@ -3,6 +3,7 @@ pluginslibdir = join_paths(libdir, 'xed', 'plugins')
 
 subdir('docinfo')
 subdir('filebrowser')
+subdir('joinlines')
 subdir('modelines')
 subdir('open-uri-context-menu')
 subdir('sort')

xed/resources/ui/xed-shortcuts.ui

@@ -7,7 +7,7 @@
       <object class="GtkShortcutsSection">
         <property name="visible">1</property>
         <property name="section-name">shortcuts</property>
-        <property name="max-height">14</property>
+        <property name="max-height">15</property>
         <child>
           <object class="GtkShortcutsGroup">
             <property name="visible">1</property>
@@ -354,6 +354,13 @@
                 <property name="title" translatable="yes">Toggle comment</property>
               </object>
             </child>
+            <child>
+              <object class="GtkShortcutsShortcut">
+                <property name="visible">1</property>
+                <property name="accelerator">&lt;ctrl&gt;J</property>
+                <property name="title" translatable="yes">Join Lines</property>
+              </object>
+            </child>
           </object>
         </child>
       </object>