From 4d47692154b282803eedac75cf72a20d3b320710 Mon Sep 17 00:00:00 2001 From: Terry Jan Reedy Date: Sat, 13 May 2023 02:45:08 -0400 Subject: [PATCH] gh-75710: IDLE - add docstrings and comments to editor module Commit extracted from PR #3669. Will edits more later. Co-authored-by: Cheryl Sabella --- Lib/idlelib/editor.py | 127 +++++++++++++++++++++++++++++++++--------- 1 file changed, 102 insertions(+), 25 deletions(-) diff --git a/Lib/idlelib/editor.py b/Lib/idlelib/editor.py index 505815502600b1..21402ad7139173 100644 --- a/Lib/idlelib/editor.py +++ b/Lib/idlelib/editor.py @@ -446,6 +446,26 @@ def set_line_and_column(self, event=None): self.status_bar.set_label('column', 'Col: %s' % column) self.status_bar.set_label('line', 'Ln: %s' % line) + + """ Menu definitions and functions. + * self.menubar - the always visible horizontal menu bar. + * mainmenu.menudefs - a list of tuples, one for each menubar item. + Each tuple pairs a lower-case name and list of dropdown items. + Each item is a name, virtual event pair or None for separator. + * mainmenu.default_keydefs - maps events to keys. + * text.keydefs - same. + * cls.menu_specs - menubar name, titlecase display form pairs + with Alt-hotkey indicator. A subset of menudefs items. + * self.menudict - map menu name to dropdown menu. + * self.recent_files_menu - 2nd level cascade in the file cascade. + * self.wmenu_end - set in __init__ (purpose unclear). + + createmenubar, postwindowsmenu, update_menu_label, update_menu_state, + ApplyKeybings (2nd part), reset_help_menu_entries, + _extra_help_callback, update_recent_files_list, + apply_bindings, fill_menus, (other functions?) + """ + menu_specs = [ ("file", "_File"), ("edit", "_Edit"), @@ -456,8 +476,22 @@ def set_line_and_column(self, event=None): ("help", "_Help"), ] - def createmenubar(self): + """Populate the menu bar widget for the editor window. + + Each option on the menubar is itself a cascade-type Menu widget + with the menubar as the parent. The names, labels, and menu + shortcuts for the menubar items are stored in menu_specs. Each + submenu is subsequently populated in fill_menus(), except for + 'Recent Files' which is added to the File menu here. + + Instance variables: + menubar: Menu widget containing first level menu items. + menudict: Dictionary of {menuname: Menu instance} items. The keys + represent the valid menu items for this window and may be a + subset of all the menudefs available. + recent_files_menu: Menu widget contained within the 'file' menudict. + """ mbar = self.menubar self.menudict = menudict = {} for name, label in self.menu_specs: @@ -480,7 +514,10 @@ def createmenubar(self): self.reset_help_menu_entries() def postwindowsmenu(self): - # Only called when Window menu exists + """Callback to register window. + + Only called when Window menu exists. + """ menu = self.menudict['window'] end = menu.index("end") if end is None: @@ -859,8 +896,11 @@ def ResetFont(self): self.set_width() def RemoveKeybindings(self): - "Remove the keybindings before they are changed." - # Called from configdialog.py + """Remove the virtual, configurable keybindings. + + Leaves the default Tk Text keybindings. + """ + # Called from configdialog.deactivate_current_config. self.mainmenu.default_keydefs = keydefs = idleConf.GetCurrentKeySet() for event, keylist in keydefs.items(): self.text.event_delete(event, *keylist) @@ -871,15 +911,19 @@ def RemoveKeybindings(self): self.text.event_delete(event, *keylist) def ApplyKeybindings(self): - "Update the keybindings after they are changed" - # Called from configdialog.py + """Apply the virtual, configurable keybindings. + + Alse update hotkeys to current keyset. + """ + # Called from configdialog.activate_config_changes. self.mainmenu.default_keydefs = keydefs = idleConf.GetCurrentKeySet() self.apply_bindings() for extensionName in self.get_standard_extension_names(): xkeydefs = idleConf.GetExtensionBindings(extensionName) if xkeydefs: self.apply_bindings(xkeydefs) - #update menu accelerators + + # Update menu accelerators. menuEventDict = {} for menu in self.mainmenu.menudefs: menuEventDict[menu[0]] = {} @@ -914,25 +958,25 @@ def set_notabs_indentwidth(self): type='int') def reset_help_menu_entries(self): - "Update the additional help entries on the Help menu" + """Update the additional help entries on the Help menu.""" help_list = idleConf.GetAllExtraHelpSourcesList() helpmenu = self.menudict['help'] - # first delete the extra help entries, if any + # First delete the extra help entries, if any. helpmenu_length = helpmenu.index(END) if helpmenu_length > self.base_helpmenu_length: helpmenu.delete((self.base_helpmenu_length + 1), helpmenu_length) - # then rebuild them + # Then rebuild them. if help_list: helpmenu.add_separator() for entry in help_list: - cmd = self.__extra_help_callback(entry[1]) + cmd = self._extra_help_callback(entry[1]) helpmenu.add_command(label=entry[0], command=cmd) - # and update the menu dictionary + # And update the menu dictionary. self.menudict['help'] = helpmenu - def __extra_help_callback(self, helpfile): - "Create a callback with the helpfile value frozen at definition time" - def display_extra_help(helpfile=helpfile): + def _extra_help_callback(self, resource): + """Return a callback that loads resource (file or web page).""" + def display_extra_help(helpfile=resource): if not helpfile.startswith(('www', 'http')): helpfile = os.path.normpath(helpfile) if sys.platform[:3] == 'win': @@ -1158,6 +1202,7 @@ def load_extension(self, name): self.text.bind(vevent, getattr(ins, methodname)) def apply_bindings(self, keydefs=None): + """Add events with keys to self.text.""" if keydefs is None: keydefs = self.mainmenu.default_keydefs text = self.text @@ -1167,9 +1212,10 @@ def apply_bindings(self, keydefs=None): text.event_add(event, *keylist) def fill_menus(self, menudefs=None, keydefs=None): - """Add appropriate entries to the menus and submenus + """Fill in dropdown menus used by this window. - Menus that are absent or None in self.menudict are ignored. + Items whose name begins with '!' become checkbuttons. + Other names indicate commands. None becomes a separator. """ if menudefs is None: menudefs = self.mainmenu.menudefs @@ -1182,7 +1228,7 @@ def fill_menus(self, menudefs=None, keydefs=None): if not menu: continue for entry in entrylist: - if not entry: + if entry is None: menu.add_separator() else: label, eventname = entry @@ -1218,11 +1264,13 @@ def setvar(self, name, value, vartype=None): else: raise NameError(name) - def get_var_obj(self, name, vartype=None): - var = self.tkinter_vars.get(name) + def get_var_obj(self, eventname, vartype=None): + """Return a tkinter variable instance for the event. + """ + var = self.tkinter_vars.get(eventname) if not var and vartype: - # create a Tkinter variable object with self.text as master: - self.tkinter_vars[name] = var = vartype(self.text) + # Create a Tkinter variable object. + self.tkinter_vars[eventname] = var = vartype(self.text) return var # Tk implementations of "virtual text methods" -- each platform @@ -1613,8 +1661,16 @@ def run(self): ### end autoindent code ### def prepstr(s): - # Helper to extract the underscore from a string, e.g. - # prepstr("Co_py") returns (2, "Copy"). + """Extract the underscore from a string. + + For example, prepstr("Co_py") returns (2, "Copy"). + + Args: + s: String with underscore. + + Returns: + Tuple of (position of underscore, string without underscore). + """ i = s.find('_') if i >= 0: s = s[:i] + s[i+1:] @@ -1628,6 +1684,18 @@ def prepstr(s): } def get_accelerator(keydefs, eventname): + """Return a formatted string for the keybinding of an event. + + Convert the first keybinding for a given event to a form that + can be displayed as an accelerator on the menu. + + Args: + keydefs: Dictionary of valid events to keybindings. + eventname: Event to retrieve keybinding for. + + Returns: + Formatted string of the keybinding. + """ keylist = keydefs.get(eventname) # issue10940: temporary workaround to prevent hang with OS X Cocoa Tk 8.5 # if not keylist: @@ -1637,14 +1705,23 @@ def get_accelerator(keydefs, eventname): "<>"}): return "" s = keylist[0] + # Convert strings of the form -singlelowercase to -singleuppercase. s = re.sub(r"-[a-z]\b", lambda m: m.group().upper(), s) + # Convert certain keynames to their symbol. s = re.sub(r"\b\w+\b", lambda m: keynames.get(m.group(), m.group()), s) + # Remove Key- from string. s = re.sub("Key-", "", s) - s = re.sub("Cancel","Ctrl-Break",s) # dscherer@cmu.edu + # Convert Cancel to Ctrl-Break. + s = re.sub("Cancel", "Ctrl-Break", s) # dscherer@cmu.edu + # Convert Control to Ctrl-. s = re.sub("Control-", "Ctrl-", s) + # Change - to +. s = re.sub("-", "+", s) + # Change >< to space. s = re.sub("><", " ", s) + # Remove <. s = re.sub("<", "", s) + # Remove >. s = re.sub(">", "", s) return s