cs_default.py: Add entry for terminal exec-arg

Terminals have options to provide it with a command to run, which may
vary between different terminals. The option text is saved in the
`org.cinnamon.desktop.default-applications.terminal` GSettings schema,
and used in various places in the Cinnamon desktop. This was previously
not configurable in a GUI and will require the user to enter a gsettings
command, so add the functionality to "Preferred Applications".

Fixes #10938.

Author: veractor

files/usr/share/cinnamon/cinnamon-settings/modules/cs_default.py

@@ -309,6 +309,23 @@ def onChanged(self, button):
         command_key = self.active_items[index_num]
         self.settings.set_string("exec", command_key)
 
+class TerminalExecArgEntry(Gtk.Entry):
+    def __init__(self):
+        super(TerminalExecArgEntry, self).__init__()
+
+        self.connect("changed", self.onChanged)
+
+        self.settings = Gio.Settings.new(TERMINAL_SCHEMA)
+        self.key_value = self.settings.get_string("exec-arg")
+
+        self.get_buffer().set_text(self.key_value, -1)
+
+        self.set_placeholder_text("exec-arg")
+        self.set_tooltip_text(_("Command-line option for your terminal to execute a passed-in command."))
+
+    def onChanged(self, entry):
+        self.settings.set_string("exec-arg", entry.get_buffer().get_text())
+
 class DefaultCalculatorButton(Gtk.AppChooserButton):
     def __init__(self):
         super(DefaultCalculatorButton, self).__init__()
@@ -581,9 +598,15 @@ def on_module_selected(self):
                     widget = SettingsWidget()
                     button = DefaultTerminalButton()
                     label = MnemonicLabel(_("Terminal"), button)
-                    size_group.add_widget(button)
+                    entry = TerminalExecArgEntry()
+
+                    box = Gtk.VBox()
+                    box.pack_start(button, False, False, 0)
+                    box.pack_start(entry, False, False, 0)
+                    size_group.add_widget(box)
+
                     widget.pack_start(label, False, False, 0)
-                    widget.pack_end(button, False, False, 0)
+                    widget.pack_end(box, False, False, 0)
                     settings.add_row(widget)
 
                     # Calculator