Add record changed callback

Only when the current record has changed that those objects needs to be
refreshed/cleared:

    - the info bar
    - the resources
    - the attachment preview
    - the chat

Closes #15012
(grafted from dc3a3e20006329b742e6f989a0fd01d485ec80b1)

--HG--
branch : 8.0

sao/src/screen.js

@@ -1362,6 +1362,7 @@
             return this.__current_record;
         },
         set current_record(record) {
+            let changed = this.__current_record !== record;
             this.__current_record = record;
             var pos = null;
             var record_id = null;
@@ -1377,15 +1378,22 @@
             this.record_message(
                 pos || 0, this.group.length + this.offset, this.search_count,
                 record_id);
-            if (this.switch_callback) {
-                this.switch_callback();
-            }
-            if (this.has_update_resources()) {
-                if (record) {
-                    record.get_resources().always(
-                        this.update_resources.bind(this));
-                } else {
-                    this.update_resources();
+            if (changed) {
+                for (let window_ of this.windows) {
+                    if (window_.record_changed) {
+                        window_.record_changed();
+                    }
+                }
+                if (this.switch_callback) {
+                    this.switch_callback();
+                }
+                if (this.has_update_resources()) {
+                    if (record) {
+                        record.get_resources().always(
+                            this.update_resources.bind(this));
+                    } else {
+                        this.update_resources();
+                    }
                 }
             }
         },

sao/src/tab.js

@@ -1611,8 +1611,18 @@
                 msg = name + '/' + Sao.common.humanize(size);
             }
             this.status_label.text(msg).attr('title', msg);
-            this.info_bar.clear();
             this.set_buttons_sensitive();
+        },
+        record_modified: function() {
+            this.set_buttons_sensitive();
+            this.info_bar.refresh();
+        },
+        record_saved: function() {
+            this.set_buttons_sensitive();
+            this.refresh_resources();
+        },
+        record_changed: function() {
+            this.info_bar.clear();
             this.refresh_attachment_preview();
 
             if (this._chat) {
@@ -1627,14 +1637,6 @@
                 this.update_sidebar();
             }
         },
-        record_modified: function() {
-            this.set_buttons_sensitive();
-            this.info_bar.refresh();
-        },
-        record_saved: function() {
-            this.set_buttons_sensitive();
-            this.refresh_resources();
-        },
         action: function() {
             window.setTimeout(() => {
                 this.buttons.action.click();

tryton/tryton/gui/window/form.py

@@ -652,19 +652,7 @@ class Form(TabContent):
         else:
             msg = "%s/%s" % (name, common.humanize(size))
         self.status_label.set_text(msg)
-        self.info_bar_clear()
         self.set_buttons_sensitive()
-        self.refresh_attachment_preview()
-        if self._chat:
-            self._chat.unregister()
-            self.chat.remove(self._chat.widget)
-            if self.screen.current_reference:
-                self._chat = Chat(self.screen.current_reference)
-                self.chat.add(self._chat.widget)
-                self.chat.show_all()
-                self._chat.refresh()
-            else:
-                self.buttons['chat'].set_active(False)
 
     def record_modified(self):
         def _record_modified():
@@ -679,6 +667,20 @@ class Form(TabContent):
         self.set_buttons_sensitive()
         self.refresh_resources()
 
+    def record_changed(self):
+        self.info_bar_clear()
+        self.refresh_attachment_preview()
+        if self._chat:
+            self._chat.unregister()
+            self.chat.remove(self._chat.widget)
+            if self.screen.current_reference:
+                self._chat = Chat(self.screen.current_reference)
+                self.chat.add(self._chat.widget)
+                self.chat.show_all()
+                self._chat.refresh()
+            else:
+                self.buttons['chat'].set_active(False)
+
     def modified_save(self):
         self.screen.save_tree_state()
         self.screen.current_view.set_value()

tryton/tryton/gui/window/view_form/screen/screen.py

@@ -502,6 +502,7 @@ class Screen:
         return self.__current_record
 
     def __set_current_record(self, record):
+        changed = self.__current_record != record
         self.__current_record = record
         if record:
             try:
@@ -514,9 +515,13 @@ class Screen:
         self.record_message(
             pos, len(self.group) + self.offset,
             self.search_count, record and record.id)
-        self.update_resources(record.resources if record else None)
-        # update resources after 1 second
-        GLib.timeout_add(1000, self._update_resources, record)
+        if changed:
+            for window in self.windows:
+                if hasattr(window, 'record_changed'):
+                    window.record_changed()
+            self.update_resources(record.resources if record else None)
+            # update resources after 1 second
+            GLib.timeout_add(1000, self._update_resources, record)
 
     current_record = property(__get_current_record, __set_current_record)