bpo-27099: IDLE - Convert built-in extensions to regular features (#2494)

About 10 IDLE features were implemented as supposedly optional
extensions.  Their different behavior could be confusing or worse for
users and not good for maintenance.  Hence the conversion.

The main difference for users is that user configurable key bindings
for builtin features are now handled uniformly.  Now, editing a binding
in a keyset only affects its value in the keyset.  All bindings are
defined together in the system-specific default keysets in config-
extensions.def.  All custom keysets are saved as a whole in config-
extension.cfg.  All take effect as soon as one clicks Apply or Ok.

The affected events are '<<force-open-completions>>', '<<expand-word>>',
'<<force-open-calltip>>', '<<flash-paren>>', '<<format-paragraph>>',
'<<run-module>>', '<<check-module>>', and '<<zoom-height>>'.  Any
(global) customizations made before 3.6.3 will not affect their keyset-
specific customization after 3.6.3. and vice versa.

Inital patch by Charles Wohlganger, revised by Terry Jan Reedy.

1 files changed, 32 insertions, 66 deletions

diff --git a/Lib/idlelib/config-extensions.def b/Lib/idlelib/config-extensions.def
index a24b8c9..e8d417b 100644
--- a/Lib/idlelib/config-extensions.def
+++ b/Lib/idlelib/config-extensions.def
@@ -1,5 +1,25 @@
 # config-extensions.def
 #
+# The following sections are for features that are no longer extensions.
+# Their options values are left here for back-compatibility.
+
+[AutoComplete]
+popupwait= 2000
+
+[CodeContext]
+numlines= 3
+visible= False
+bgcolor= LightGray
+fgcolor= Black
+
+[FormatParagraph]
+max-width= 72
+
+[ParenMatch]
+style= expression
+flash-delay= 500
+bell= True
+
 # IDLE reads several config files to determine user preferences.  This
 # file is the default configuration file for IDLE extensions settings.
 #
@@ -19,7 +39,7 @@
 # extension that may be sensibly re-configured.
 #
 # If there are no keybindings for a menus' virtual events, include lines
-# like <<toggle-code-context>>=  (See [CodeContext], below.)
+# like <<toggle-code-context>>=.
 #
 # Currently it is necessary to manually modify this file to change
 # extension key bindings and default values. To customize, create
@@ -32,68 +52,14 @@
 # See config-keys.def for notes on specifying keys and extend.txt for
 # information on creating IDLE extensions.
 
-[AutoComplete]
-enable=True
-popupwait=2000
-[AutoComplete_cfgBindings]
-force-open-completions=<Control-Key-space>
-[AutoComplete_bindings]
-autocomplete=<Key-Tab>
-try-open-completions=<KeyRelease-period> <KeyRelease-slash> <KeyRelease-backslash>
-
-[AutoExpand]
-enable=True
-[AutoExpand_cfgBindings]
-expand-word=<Alt-Key-slash>
-
-[CallTips]
-enable=True
-[CallTips_cfgBindings]
-force-open-calltip=<Control-Key-backslash>
-[CallTips_bindings]
-try-open-calltip=<KeyRelease-parenleft>
-refresh-calltip=<KeyRelease-parenright> <KeyRelease-0>
-
-[CodeContext]
-enable=True
-enable_shell=False
-numlines=3
-visible=False
-bgcolor=LightGray
-fgcolor=Black
-[CodeContext_bindings]
-toggle-code-context=
-
-[FormatParagraph]
-enable=True
-max-width=72
-[FormatParagraph_cfgBindings]
-format-paragraph=<Alt-Key-q>
-
-[ParenMatch]
-enable=True
-style= expression
-flash-delay= 500
-bell=True
-[ParenMatch_cfgBindings]
-flash-paren=<Control-Key-0>
-[ParenMatch_bindings]
-paren-closed=<KeyRelease-parenright> <KeyRelease-bracketright> <KeyRelease-braceright>
-
-[RstripExtension]
-enable=True
-enable_shell=False
-enable_editor=True
-
-[ScriptBinding]
-enable=True
-enable_shell=False
-enable_editor=True
-[ScriptBinding_cfgBindings]
-run-module=<Key-F5>
-check-module=<Alt-Key-x>
-
-[ZoomHeight]
-enable=True
-[ZoomHeight_cfgBindings]
-zoom-height=<Alt-Key-2>
+# A fake extension for testing and example purposes.  When enabled and
+# invoked, inserts or deletes z-text at beginning of every line.
+[ZzDummy]
+enable= True
+enable_shell = False
+enable_editor = True
+z-text= Z
+[ZzDummy_cfgBindings]
+z-in= <Control-Shift-KeyRelease-Insert>
+[ZzDummy_bindings]
+z-out= <Control-Shift-KeyRelease-Delete>