IDLE completions: format, factor, and fix tasks

[terryjreedy]

BPO	27609
Nosy	@terryjreedy, @csabella
Dependencies	bpo-16198: IDLE - tabbing in a string always brings up file completion window bpo-17238: IDLE: Add import statement completion bpo-18766: IDLE: Autocomplete in editor doesn't work for un-imported modules bpo-21261: Teach IDLE to Autocomplete dictionary keys bpo-22554: Idle: optionally auto-pop-up completion window for names bpo-27099: IDLE: turn built-in extensions into regular modules bpo-27534: IDLE: Reduce number and time for user process imports bpo-27675: IDLE file completion has 2 bugs depending on open quote used bpo-30632: IDLE: add unittests to test_autocomplete bpo-30666: IDLE: add tests for autocomplete window. bpo-30667: IDLE: revise doc subsection 'Completions' bpo-37765: IDLE: Include keywords in module-level autocomplete list bpo-37766: IDLE autocomplete: revise fetch_completions, add htest bpo-38943: Idle autocomplete window doesn't show up bpo-38944: Idle completion windows should close on Escape key bpo-40892: IDLE: use rlcompleter suffixed for completions

^{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 2016-07-25.00:03:08.689>
labels = ['expert-IDLE', 'type-bug', '3.10']
title = 'IDLE completions: format, factor, and fix'
updated_at = <Date 2020-07-09.23:51:51.090>
user = 'https://github.com/terryjreedy'

bugs.python.org fields:

activity = <Date 2020-07-09.23:51:51.090>
actor = 'terry.reedy'
assignee = 'terry.reedy'
closed = False
closed_date = None
closer = None
components = ['IDLE']
creation = <Date 2016-07-25.00:03:08.689>
creator = 'terry.reedy'
dependencies = ['16198', '17238', '18766', '21261', '22554', '27099', '27534', '27675', '30632', '30666', '30667', '37765', '37766', '38943', '38944', '40892']
files = []
hgrepos = []
issue_num = 27609
keywords = []
message_count = 13.0
messages = ['271186', '271187', '271190', '271214', '271923', '296032', '296033', '316311', '349070', '358150', '370846', '373265', '373433']
nosy_count = 2.0
nosy_names = ['terry.reedy', 'cheryl.sabella']
pr_nums = []
priority = 'normal'
resolution = None
stage = 'needs patch'
status = 'open'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue27609'
versions = ['Python 3.10']

[terryjreedy]

IDLE completions are currently implemented in two files: autocomplete.py and autocomplete_w.py. The first handles 'open' events, decides whether to open a window, and gathers possible completions. The second open a popup and works with the sorted list of possible completions.

FIX

• IDLE code completion window can hang or misbehave with mouse or <return> #59990.
• IDLE - tabbing in a string sometimes brings up word completion window #60402.
• IDLE: Make file-completion case-insensitive on Windows #63103.
  ENHANCE
• IDLE: Add import statement completion #61440.
• IDLE: Add completions for un-imported modules #62966.
• IDLE: autocomplete dictionary keys #65460.
• Negative delay disable auto-popups? (Not currently accepted.)
  REFACTOR
• Move objects needed by run to run.py and import from there.
  Part of IDLE: Reduce number and time for user process imports #71721
• Merge autocomplete_w into autocomplete? This was anticipated in the renaming. Do 71721 first or soon after.
• Put list and scrollbar in Frame? For future single-window IDLE? Easier testing?

Question: Why does 'dooneevent' appear in 2.x code and not 3.x code?

Tests: The currently only for a subset of autocomplete methods. There are none for the buggy window.

[terryjreedy]

Add dependencies. Last two, bpo-27099 and bpo-27534 involve multiple files and should be removed from this autocomplete list when autocomplete part is done.

[python-dev]

New changeset 1ec47de72538 by Terry Jan Reedy in branch 'default':
Issue bpo-27609: Explicitly return None when there are other returns.
https://hg.python.org/cpython/rev/1ec47de72538

[terryjreedy]

Add bpo-27675. If open quote is ' or '', actions (character key or box selection with up or down arrow) after first are not colored. ' and ''' do not complete, when needed, nor close.

[terryjreedy]

bpo-30666 Add completion tests
bpo-30667 Revise completion doc
bpo-15786 and additional discussion of completion behavior
Tab in opened box should and usually completes, but sometimes not. I don't have a consistent example.

[terryjreedy]

bpo-30632 autocomplete tests
bpo-30666 autocomplete_w tests

[terryjreedy]

In re-verifying bpo-27675, the color bug seems to be gone. The completion bug is still here, at least on Windows.

It would be good to sort the issues by whether they appear to affect autocomplete.py or autocomplete_w.py or both.

[terryjreedy]

bpo-37765 Include keywords in ''(main) list.

###### Annotate completion list, at least as an option, with 'keyword' or class, possibly prefixed with 'built-in', so 'built-in function', 'function', and so on.

bpo-37766 revise fetch_completions, add htest

[terryjreedy]

bpo-38943 Autocomplete box sometimes does not show on Ubuntu.
bpo-38944 Excape key should close completion box.

[terryjreedy]

bpo-40892 Use prefixes from rlcompleter. Compute constant once.

[terryjreedy]

Normally, tab completion works for attributes (after '.' and a possible prefix) and files (after os.sep and a possible prefix). Unique matches to prefixes are immediately selected, as for undotted module names. After changing the completion wait time and before restarting, this is disabled and tab adds spaces instead. This need a new issue and fix.

[terryjreedy]

The removed post duplicates the content of bpo-37766. Another bug is reported and will be fixed there.