IDLE: document all key bindings, add menu items for more.

[terryjreedy]

BPO	28097
Nosy	@terryjreedy, @csabella, @miss-islington
PRs	bpo-28097: IDLE - Add Previous/Next History to Shell menu #11325 [3.7] bpo-28097: IDLE - Add Previous/Next History to Shell menu (GH-11325) #11345

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = 'https://github.com/terryjreedy'
closed_at = None
created_at = <Date 2016-09-12.07:03:30.950>
labels = ['3.8', 'expert-IDLE', 'type-bug', '3.7']
title = 'IDLE: document all key bindings, add menu items for more.'
updated_at = <Date 2018-12-28.20:29:46.499>
user = 'https://github.com/terryjreedy'

bugs.python.org fields:

activity = <Date 2018-12-28.20:29:46.499>
actor = 'miss-islington'
assignee = 'terry.reedy'
closed = False
closed_date = None
closer = None
components = ['IDLE']
creation = <Date 2016-09-12.07:03:30.950>
creator = 'terry.reedy'
dependencies = []
files = []
hgrepos = []
issue_num = 28097
keywords = ['patch', 'patch', 'patch']
message_count = 7.0
messages = ['275980', '278326', '332560', '332641', '332673', '332678', '332679']
nosy_count = 3.0
nosy_names = ['terry.reedy', 'cheryl.sabella', 'miss-islington']
pr_nums = ['11325', '11345']
priority = 'normal'
resolution = None
stage = 'patch review'
status = 'open'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue28097'
versions = ['Python 3.7', 'Python 3.8']

[terryjreedy]

(Follow-up to bpo-15308, which added ^C Interrupt Execution to doc and Shell menu, and to bpo-27120, which proposed to add ^/ Toggle Highlighting, until I realized that that should be part of bpo-6858, about highlighting non-.py files.)

Every IDLE function should be documented. More should be on menu. Perhaps add Move/delete menus for cursor movement and directional deletion, if not a diagram.

Another idea. A searchable current key binding list, possible sortable by key as well as function. It should include fixed builtin bindings as well as extension bindings. See bpo-27120 for motivation.

Side issue 1: Menu entries for extensions do not reflect customization (? verify, from Roger).

Side issue 2: Menus need to be tested.

[terryjreedy]

The toggle highlighting issue is bpo-27170 (not 27120)

[csabella]

PR11325 adds Previous/Next History to the Shell menu.

[terryjreedy]

Response to history issues raised in PR:

1. Not erasing output/history is a feature: some shells save and restore recent history when close and open. Shell restart is an alternative to that. I fairly often replay statements after restart.
2. I think turning off cycling is feature bloat. (I never do so for search.)
3. The one history feature that multiple people have asked for, on another issue, is retrieval with up/down arrow, as seems to be standard. I now agree.

For items going under edit, which is already 'full', submenus will be needed. Since history is Shell only, separate entries are ok, at least for now, instead of 'History' and a submenu with 'previous' and 'next'.

[terryjreedy]

Cheryl, the addition looks nice. But for anything else, lets discuss here first.

[terryjreedy]

New changeset c0381aa by Terry Jan Reedy (Cheryl Sabella) in branch 'master':
bpo-28097: IDLE - Add Previous/Next History to Shell menu (bpo-11325)
c0381aa

[miss-islington]

New changeset b716c71 by Miss Islington (bot) in branch '3.7':
bpo-28097: IDLE - Add Previous/Next History to Shell menu (GH-11325)
b716c71