Backport PR #23024 on branch 6.x (PR: Restore widget shortcuts to Pre…

…ferences and allow to change them on the fly (Shortcuts)) (#23137)

changelogs/Spyder-6.md

@@ -4,6 +4,9 @@
 
 ### API changes
 
+* Add `plugin_name` kwarg to the `register_shortcut_for_widget` method of
+  `SpyderShortcutsMixin`.
+* The `add_configuration_observer` method was added to `SpyderConfigurationObserver`.
 * Add `items_elide_mode` kwarg to the constructors of `SpyderComboBox` and
   `SpyderComboBoxWithIcons`.
 * The `sig_item_in_popup_changed` and `sig_popup_is_hidden` signals were added

conftest.py

@@ -109,7 +109,12 @@ def pytest_collection_modifyitems(config, items):
 
 
 @pytest.fixture(autouse=True)
-def reset_conf_before_test():
+def reset_conf_before_test(request):
+    # To prevent running this fixture for a specific test, you need to use this
+    # marker.
+    if 'no_reset_conf' in request.keywords:
+        return
+
     from spyder.config.manager import CONF
     CONF.reset_to_defaults(notification=False)
 

spyder/api/config/mixins.py

@@ -10,7 +10,7 @@
 
 # Standard library imports
 import logging
-from typing import Any, Union, Optional
+from typing import Any, Callable, Optional, Union
 import warnings
 
 # Local imports
@@ -239,8 +239,10 @@ def __init__(self):
             section = self.CONF_SECTION if section is None else section
             observed_options = self._configuration_listeners[section]
             for option in observed_options:
-                logger.debug(f'{self} is observing {option} '
-                             f'in section {section}')
+                logger.debug(
+                    f'{self} is observing option "{option}" in section '
+                    f'"{section}"'
+                )
                 CONF.observe_configuration(self, section, option)
 
     def __del__(self):
@@ -257,12 +259,7 @@ def _gather_observers(self):
                     self._multi_option_listeners |= {method_name}
 
                 for section, option in info:
-                    section_listeners = self._configuration_listeners.get(
-                        section, {})
-                    option_listeners = section_listeners.get(option, [])
-                    option_listeners.append(method_name)
-                    section_listeners[option] = option_listeners
-                    self._configuration_listeners[section] = section_listeners
+                    self._add_listener(method_name, option, section)
 
     def _merge_none_observers(self):
         """Replace observers that declared section as None by CONF_SECTION."""
@@ -280,6 +277,27 @@ def _merge_none_observers(self):
         self._configuration_listeners[self.CONF_SECTION] = section_selectors
         self._configuration_listeners.pop(None, None)
 
+    def _add_listener(
+        self, func: Callable, option: ConfigurationKey, section: str
+    ):
+        """
+        Add a callable as listener of the option `option` on section `section`.
+
+        Parameters
+        ----------
+        func: Callable
+            Function/method that will be called when `option` changes.
+        option: ConfigurationKey
+            Configuration option to observe.
+        section: str
+            Name of the section where `option` is contained.
+        """
+        section_listeners = self._configuration_listeners.get(section, {})
+        option_listeners = section_listeners.get(option, [])
+        option_listeners.append(func)
+        section_listeners[option] = option_listeners
+        self._configuration_listeners[section] = section_listeners
+
     def on_configuration_change(self, option: ConfigurationKey, section: str,
                                 value: Any):
         """
@@ -298,8 +316,41 @@ def on_configuration_change(self, option: ConfigurationKey, section: str,
         section_receivers = self._configuration_listeners.get(section, {})
         option_receivers = section_receivers.get(option, [])
         for receiver in option_receivers:
-            method = getattr(self, receiver)
+            method = (
+                receiver if callable(receiver) else getattr(self, receiver)
+            )
             if receiver in self._multi_option_listeners:
                 method(option, value)
             else:
                 method(value)
+
+    def add_configuration_observer(
+        self, func: Callable, option: str, section: Optional[str] = None
+    ):
+        """
+        Add a callable to observe the option `option` on section `section`.
+
+        Parameters
+        ----------
+        func: Callable
+            Function that will be called when `option` changes.
+        option: ConfigurationKey
+            Configuration option to observe.
+        section: str
+            Name of the section where `option` is contained.
+
+        Notes
+        -----
+        - This is only necessary if you need to add a callable that is not a
+          class method to observe an option. Otherwise, you simply need to
+          decorate your method with
+          :function:`spyder.api.config.decorators.on_conf_change`.
+        """
+        if section is None:
+            section = self.CONF_SECTION
+
+        logger.debug(
+            f'{self} is observing "{option}" option on section "{section}"'
+        )
+        self._add_listener(func, option, section)
+        CONF.observe_configuration(self, section, option)

spyder/api/plugins/new_api.py

@@ -298,8 +298,8 @@ class SpyderPluginV2(QObject, SpyderActionMixin, SpyderConfigurationObserver,
         The window state.
     """
 
-    # --- Private attributes -------------------------------------------------
-    # ------------------------------------------------------------------------
+    # ---- Private attributes
+    # -------------------------------------------------------------------------
     # Define configuration name map for plugin to split configuration
     # among several files. See spyder/config/main.py
     _CONF_NAME_MAP = None
@@ -361,8 +361,8 @@ def __init__(self, parent, configuration=None):
             plugin_path = osp.join(self.get_path(), self.IMG_PATH)
             IMAGE_PATH_MANAGER.add_image_path(plugin_path)
 
-    # --- Private methods ----------------------------------------------------
-    # ------------------------------------------------------------------------
+    # ---- Private methods
+    # -------------------------------------------------------------------------
     def _register(self, omit_conf=False):
         """
         Setup and register plugin in Spyder's main window and connect it to
@@ -397,8 +397,8 @@ def _unregister(self):
         self.is_compatible = None
         self.is_registered = False
 
-    # --- API: available methods ---------------------------------------------
-    # ------------------------------------------------------------------------
+    # ---- API: available methods
+    # -------------------------------------------------------------------------
     def get_path(self):
         """
         Return the plugin's system path.
@@ -765,8 +765,8 @@ def get_command_line_options(self):
             sys_argv = [sys.argv[0]]  # Avoid options passed to pytest
             return get_options(sys_argv)[0]
 
-    # --- API: Mandatory methods to define -----------------------------------
-    # ------------------------------------------------------------------------
+    # ---- API: Mandatory methods to define
+    # -------------------------------------------------------------------------
     @staticmethod
     def get_name():
         """
@@ -832,8 +832,8 @@ def on_initialize(self):
             f'The plugin {type(self)} is missing an implementation of '
             'on_initialize')
 
-    # --- API: Optional methods to override ----------------------------------
-    # ------------------------------------------------------------------------
+    # ---- API: Optional methods to override
+    # -------------------------------------------------------------------------
     @staticmethod
     def check_compatibility():
         """
@@ -952,14 +952,14 @@ class SpyderDockablePlugin(SpyderPluginV2):
     """
     A Spyder plugin to enhance functionality with a dockable widget.
     """
-    # --- API: Mandatory attributes ------------------------------------------
-    # ------------------------------------------------------------------------
+    # ---- API: Mandatory attributes
+    # -------------------------------------------------------------------------
     # This is the main widget of the dockable plugin.
     # It needs to be a subclass of PluginMainWidget.
     WIDGET_CLASS = None
 
-    # --- API: Optional attributes -------------------------------------------
-    # ------------------------------------------------------------------------
+    # ---- API: Optional attributes
+    # -------------------------------------------------------------------------
     # Define a list of plugins next to which we want to to tabify this plugin.
     # Example: ['Plugins.Editor']
     TABIFY = []
@@ -972,8 +972,8 @@ class SpyderDockablePlugin(SpyderPluginV2):
     # the action to switch is called a second time.
     RAISE_AND_FOCUS = False
 
-    # --- API: Available signals ---------------------------------------------
-    # ------------------------------------------------------------------------
+    # ---- API: Available signals
+    # -------------------------------------------------------------------------
     sig_focus_changed = Signal()
     """
     This signal is emitted to inform the focus of this plugin has changed.
@@ -1010,8 +1010,8 @@ class SpyderDockablePlugin(SpyderPluginV2):
     needs its ancestor to be updated.
     """
 
-    # --- Private methods ----------------------------------------------------
-    # ------------------------------------------------------------------------
+    # ---- Private methods
+    # -------------------------------------------------------------------------
     def __init__(self, parent, configuration):
         if not issubclass(self.WIDGET_CLASS, PluginMainWidget):
             raise SpyderAPIError(
@@ -1053,8 +1053,8 @@ def __init__(self, parent, configuration):
         widget.sig_update_ancestor_requested.connect(
             self.sig_update_ancestor_requested)
 
-    # --- API: available methods ---------------------------------------------
-    # ------------------------------------------------------------------------
+    # ---- API: available methods
+    # -------------------------------------------------------------------------
     def before_long_process(self, message):
         """
         Show a message in main window's status bar, change the mouse pointer
@@ -1116,8 +1116,8 @@ def set_ancestor(self, ancestor_widget):
         """
         self.get_widget().set_ancestor(ancestor_widget)
 
-    # --- Convenience methods from the widget exposed on the plugin
-    # ------------------------------------------------------------------------
+    # ---- Convenience methods from the widget exposed on the plugin
+    # -------------------------------------------------------------------------
     @property
     def dockwidget(self):
         return self.get_widget().dockwidget