* bug#29305: 26.0.90; Wrong electrified indentation with Python multiline string
@ 2017-11-15 9:33 Lele Gaifax
2017-11-19 14:27 ` Noam Postavsky
0 siblings, 1 reply; 6+ messages in thread
From: Lele Gaifax @ 2017-11-15 9:33 UTC (permalink / raw)
To: 29305
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In python-mode, when I'm inside a triple-quoted string or immediately after
it and insert (say) a comma, current line indentation should not change.
I tried to play with python-indent-post-self-insert-function, but could not
figure out how to recognize when I'm within or close to a multiline string.
The attached patch adds two (currently) failing tests.
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[-- Attachment #2: 0002-Add-failing-tests-on-electric-indentation-and-Python.patch --]
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From 21cd61ab71a16490a5c0c569a2715b7e5f2d7b98 Mon Sep 17 00:00:00 2001
From: Lele Gaifax <lele@metapensiero.it>
Date: Wed, 15 Nov 2017 10:10:19 +0100
Subject: [PATCH 2/2] Add failing tests on electric-indentation and Python
multiline strings
* test/lisp/progmodes/python-tests.el
(python-indent-electric-comma-inside-multiline-string,
python-indent-electric-comma-after-multiline-string): New tests.
---
test/lisp/progmodes/python-tests.el | 31 +++++++++++++++++++++++++++++++
1 file changed, 31 insertions(+)
diff --git a/test/lisp/progmodes/python-tests.el b/test/lisp/progmodes/python-tests.el
index a59885637e..010eb67160 100644
--- a/test/lisp/progmodes/python-tests.el
+++ b/test/lisp/progmodes/python-tests.el
@@ -1109,6 +1109,37 @@ python-tests-visible-string
(should (eq (car (python-indent-context)) :inside-string))
(should (= (python-indent-calculate-indentation) 4))))
+(ert-deftest python-indent-electric-comma-inside-multiline-string ()
+ "Test indentation ...."
+ (python-tests-with-temp-buffer
+ "
+a = (
+ '''\
+- foo,
+- bar
+'''
+"
+ (python-tests-look-at "- bar")
+ (should (eq (car (python-indent-context)) :inside-string))
+ (goto-char (line-end-position))
+ (python-tests-self-insert ",")
+ (should (= (current-indentation) 0))))
+
+(ert-deftest python-indent-electric-comma-after-multiline-string ()
+ "Test indentation ...."
+ (python-tests-with-temp-buffer
+ "
+a = (
+ '''\
+- foo,
+- bar'''
+"
+ (python-tests-look-at "- bar'''")
+ (should (eq (car (python-indent-context)) :inside-string))
+ (goto-char (line-end-position))
+ (python-tests-self-insert ",")
+ (should (= (current-indentation) 0))))
+
(ert-deftest python-indent-electric-colon-1 ()
"Test indentation case from Bug#18228."
(python-tests-with-temp-buffer
--
2.15.0
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--
nickname: Lele Gaifax | Quando vivrò di quello che ho pensato ieri
real: Emanuele Gaifas | comincerò ad aver paura di chi mi copia.
lele@metapensiero.it | -- Fortunato Depero, 1929.
^ permalink raw reply related [flat|nested] 6+ messages in thread* bug#29305: 26.0.90; Wrong electrified indentation with Python multiline string
2017-11-15 9:33 bug#29305: 26.0.90; Wrong electrified indentation with Python multiline string Lele Gaifax
@ 2017-11-19 14:27 ` Noam Postavsky
2017-11-21 9:15 ` Lele Gaifax
0 siblings, 1 reply; 6+ messages in thread
From: Noam Postavsky @ 2017-11-19 14:27 UTC (permalink / raw)
To: Lele Gaifax; +Cc: 29305
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severity 29305 minor
tags 29305 + patch
quit
Lele Gaifax <lele@metapensiero.it> writes:
> In python-mode, when I'm inside a triple-quoted string or immediately after
> it and insert (say) a comma, current line indentation should not change.
>
> I tried to play with python-indent-post-self-insert-function, but could not
> figure out how to recognize when I'm within or close to a multiline string.
How about this:
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[-- Attachment #2: patch --]
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From d48c6f6d25911b2d128c72eec9ff5b3f457a3545 Mon Sep 17 00:00:00 2001
From: Noam Postavsky <npostavs@gmail.com>
Date: Sun, 19 Nov 2017 09:00:43 -0500
Subject: [PATCH] Disable eletric indent for python strings (Bug#29305)
* lisp/progmodes/python.el (python-indent-post-self-insert-function):
Do nothing when in string syntax or indent context.
---
lisp/progmodes/python.el | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/lisp/progmodes/python.el b/lisp/progmodes/python.el
index d4226e5ce7..093dd0ae65 100644
--- a/lisp/progmodes/python.el
+++ b/lisp/progmodes/python.el
@@ -1257,7 +1257,9 @@ python-indent-post-self-insert-function
If a line renders a paren alone, after adding a char before it,
the line will be re-indented automatically if needed."
(when (and electric-indent-mode
- (eq (char-before) last-command-event))
+ (eq (char-before) last-command-event)
+ (not (python-syntax-context 'string))
+ (not (eq (car (python-indent-context)) :inside-string)))
(cond
;; Electric indent inside parens
((and
--
2.11.0
^ permalink raw reply related [flat|nested] 6+ messages in thread* bug#29305: 26.0.90; Wrong electrified indentation with Python multiline string
2017-11-19 14:27 ` Noam Postavsky
@ 2017-11-21 9:15 ` Lele Gaifax
2017-11-21 13:52 ` Noam Postavsky
0 siblings, 1 reply; 6+ messages in thread
From: Lele Gaifax @ 2017-11-21 9:15 UTC (permalink / raw)
To: Noam Postavsky; +Cc: 29305
Thanks Noam, I tried your suggestion and it seems doing the right thing, I
will keep exercising this for a while.
> @@ -1257,7 +1257,9 @@ python-indent-post-self-insert-function
> If a line renders a paren alone, after adding a char before it,
> the line will be re-indented automatically if needed."
> (when (and electric-indent-mode
> - (eq (char-before) last-command-event))
> + (eq (char-before) last-command-event)
> + (not (python-syntax-context 'string))
> + (not (eq (car (python-indent-context)) :inside-string)))
> (cond
> ;; Electric indent inside parens
> ((and
I wish to better understand *why* it works though: in particular, I fail to
see how it can handle the situation illustrated by my second test case
(python-indent-electric-comma-after-multiline-string):
a = (
'''\
- foo,
- bar'''
where I'm going to add a comma *after* the multiline string: when I tried to
find a solution, I thought I'd need to consider the state *at
(beginning-of-line)*, in other words, morphing my experiment on top of
your change to something like:
(when (and electric-indent-mode
(eq (char-before) last-command-event)
(not (python-syntax-context 'string))
(save-excursion
(beginning-of-line)
(not (eq (car (python-indent-context)) :inside-string))))
but your simpler code tells that it is not needed...
I will try harder ;-)
ciao, lele.
--
nickname: Lele Gaifax | Quando vivrò di quello che ho pensato ieri
real: Emanuele Gaifas | comincerò ad aver paura di chi mi copia.
lele@metapensiero.it | -- Fortunato Depero, 1929.
^ permalink raw reply [flat|nested] 6+ messages in thread* bug#29305: 26.0.90; Wrong electrified indentation with Python multiline string
2017-11-21 9:15 ` Lele Gaifax
@ 2017-11-21 13:52 ` Noam Postavsky
2017-11-21 14:22 ` Lele Gaifax
0 siblings, 1 reply; 6+ messages in thread
From: Noam Postavsky @ 2017-11-21 13:52 UTC (permalink / raw)
To: Lele Gaifax; +Cc: 29305
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Lele Gaifax <lele@metapensiero.it> writes:
> where I'm going to add a comma *after* the multiline string: when I tried to
> find a solution, I thought I'd need to consider the state *at
> (beginning-of-line)*, in other words, morphing my experiment on top of
> your change to something like:
>
> (when (and electric-indent-mode
> (eq (char-before) last-command-event)
> (not (python-syntax-context 'string))
> (save-excursion
> (beginning-of-line)
> (not (eq (car (python-indent-context)) :inside-string))))
>
> but your simpler code tells that it is not needed...
Well, there is no big mystery I think. It's simply that
`python-indent-context' goes to the beginning of line itself:
(defun python-indent-context ()
...
(save-restriction
(prog-widen)
(let ((ppss (save-excursion
(beginning-of-line)
(syntax-ppss))))
Actually, I forgot to check for an indent context of :inside-docstring
though. I'm not sure if there is valid python code which could trigger
electric indent next to a docstring, but it's probably more correct to
do this instead:
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[-- Attachment #2: patch --]
[-- Type: text/x-diff, Size: 1192 bytes --]
From a965850b20109218713583743873952a395b7e1c Mon Sep 17 00:00:00 2001
From: Noam Postavsky <npostavs@gmail.com>
Date: Sun, 19 Nov 2017 09:00:43 -0500
Subject: [PATCH v2] Disable eletric indent for python strings (Bug#29305)
* lisp/progmodes/python.el (python-indent-post-self-insert-function):
Do nothing when point or beginning of line is in string.
---
lisp/progmodes/python.el | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/lisp/progmodes/python.el b/lisp/progmodes/python.el
index d4226e5ce7..9e09bfc594 100644
--- a/lisp/progmodes/python.el
+++ b/lisp/progmodes/python.el
@@ -1257,7 +1257,11 @@ python-indent-post-self-insert-function
If a line renders a paren alone, after adding a char before it,
the line will be re-indented automatically if needed."
(when (and electric-indent-mode
- (eq (char-before) last-command-event))
+ (eq (char-before) last-command-event)
+ (not (python-syntax-context 'string))
+ (save-excursion
+ (beginning-of-line)
+ (not (python-syntax-context 'string (syntax-ppss)))))
(cond
;; Electric indent inside parens
((and
--
2.11.0
^ permalink raw reply related [flat|nested] 6+ messages in thread* bug#29305: 26.0.90; Wrong electrified indentation with Python multiline string
2017-11-21 13:52 ` Noam Postavsky
@ 2017-11-21 14:22 ` Lele Gaifax
2017-12-02 14:54 ` Noam Postavsky
0 siblings, 1 reply; 6+ messages in thread
From: Lele Gaifax @ 2017-11-21 14:22 UTC (permalink / raw)
To: Noam Postavsky; +Cc: 29305
Noam Postavsky <npostavs@users.sourceforge.net> writes:
> Well, there is no big mystery I think. It's simply that
> `python-indent-context' goes to the beginning of line itself:
>
> (defun python-indent-context ()
> ...
> (save-restriction
> (prog-widen)
> (let ((ppss (save-excursion
> (beginning-of-line)
> (syntax-ppss))))
Doh, you are right, I just skimmed through its docstring :-|
> Actually, I forgot to check for an indent context of :inside-docstring
> though. I'm not sure if there is valid python code which could trigger
> electric indent next to a docstring, but it's probably more correct to
> do this instead:
Will try your latest in my next Emacs sessions.
> Subject: [PATCH v2] Disable eletric indent for python strings (Bug#29305)
ele*ctric
Thank you again,
ciao, lele.
--
nickname: Lele Gaifax | Quando vivrò di quello che ho pensato ieri
real: Emanuele Gaifas | comincerò ad aver paura di chi mi copia.
lele@metapensiero.it | -- Fortunato Depero, 1929.
^ permalink raw reply [flat|nested] 6+ messages in thread
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2017-11-15 9:33 bug#29305: 26.0.90; Wrong electrified indentation with Python multiline string Lele Gaifax
2017-11-19 14:27 ` Noam Postavsky
2017-11-21 9:15 ` Lele Gaifax
2017-11-21 13:52 ` Noam Postavsky
2017-11-21 14:22 ` Lele Gaifax
2017-12-02 14:54 ` Noam Postavsky
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