[meld: 4/8] prepare for gear menu customization

[Kai Willadsen <kaiw src gnome org>]

commit 018965897fea29c0958465a7eb5e518fa9459fd6
Author: Roberto Vidal <vidal roberto j gmail com>
Date:   Sat Mar 12 14:37:36 2022 +0100

    prepare for gear menu customization

 meld/filediff.py               |  4 ++++
 meld/meldwindow.py             | 27 +++++++++++++++++++++++----
 meld/resources/ui/appwindow.ui |  1 +
 3 files changed, 28 insertions(+), 4 deletions(-)
---
diff --git a/meld/filediff.py b/meld/filediff.py
index 000b7444..2ff9aa3c 100644
--- a/meld/filediff.py
+++ b/meld/filediff.py
@@ -1432,6 +1432,10 @@ class FileDiff(Gtk.VBox, MeldDoc):
             return True
         return False
 
+    def syncpoint_action(self):
+        if self.focus_pane:
+            return self._syncpoint_action(self.textview.index(self.focus_pane))
+
     def set_syncpoint_menuitem(self, pane):
         action = self._syncpoint_action(pane)
 
diff --git a/meld/meldwindow.py b/meld/meldwindow.py
index 49c04ee3..d5dd6576 100644
--- a/meld/meldwindow.py
+++ b/meld/meldwindow.py
@@ -30,7 +30,7 @@ from meld.const import (
     FileComparisonMode,
 )
 from meld.dirdiff import DirDiff
-from meld.filediff import FileDiff
+from meld.filediff import FileDiff, SyncpointState
 from meld.melddoc import ComparisonState, MeldDoc
 from meld.menuhelpers import replace_menu_section
 from meld.newdifftab import NewDiffTab
@@ -121,9 +121,9 @@ class MeldWindow(Gtk.ApplicationWindow):
         Gtk.ApplicationWindow.do_realize(self)
 
         app = self.get_application()
-        menu = app.get_menu_by_id("gear-menu")
+        gear_menu = app.get_menu_by_id("gear-menu")
         self.gear_menu_button.set_popover(
-            Gtk.Popover.new_from_model(self.gear_menu_button, menu))
+            Gtk.Popover.new_from_model(self.gear_menu_button, gear_menu))
 
         filter_model = app.get_menu_by_id("text-filter-menu")
         self.text_filter_button.set_popover(
@@ -147,7 +147,7 @@ class MeldWindow(Gtk.ApplicationWindow):
                 "file-filters-changed", self.update_filename_filters),
         ]
 
-        meld.ui.util.extract_accels_from_menu(menu, self.get_application())
+        meld.ui.util.extract_accels_from_menu(gear_menu, self.get_application())
 
     def update_filename_filters(self, settings):
         filter_items_model = Gio.Menu()
@@ -363,6 +363,25 @@ class MeldWindow(Gtk.ApplicationWindow):
             doc.scheduler.add_task(doc.auto_compare)
         return doc
 
+    @Gtk.Template.Callback()
+    def on_gear_popup_menu(self, menubutton):
+        if not menubutton.get_active():
+            return
+
+        current_page_idx = self.notebook.get_current_page()
+
+        if current_page_idx == -1:
+            return
+
+        page = self.notebook.get_nth_page(current_page_idx)
+
+        if not isinstance(page, FileDiff):
+            return
+
+        action = page.syncpoint_action()
+
+        # TODO: recompute menu items
+
     def append_filediff(
             self, gfiles, *, encodings=None, merge_output=None, meta=None):
         assert len(gfiles) in (1, 2, 3)
diff --git a/meld/resources/ui/appwindow.ui b/meld/resources/ui/appwindow.ui
index 6717a3ff..7b952f54 100644
--- a/meld/resources/ui/appwindow.ui
+++ b/meld/resources/ui/appwindow.ui
@@ -172,6 +172,7 @@
             <property name="action-name">win.gear-menu</property>
             <property name="visible">true</property>
             <property name="can_focus">False</property>
+            <signal name="toggled" handler="on_gear_popup_menu"></signal>
             <child>
               <object class="GtkImage">
                 <property name="icon-name">open-menu-symbolic</property>