mirror of
https://github.com/python/cpython.git
synced 2024-11-30 10:41:14 +01:00
3254 lines
121 KiB
EmacsLisp
3254 lines
121 KiB
EmacsLisp
;;; python-mode.el --- Major mode for editing Python programs
|
||
|
||
;; Copyright (C) 1992,1993,1994 Tim Peters
|
||
|
||
;; Author: 1995-2001 Barry A. Warsaw
|
||
;; 1992-1994 Tim Peters
|
||
;; Maintainer: python-mode@python.org
|
||
;; Created: Feb 1992
|
||
;; Keywords: python languages oop
|
||
|
||
(defconst py-version "$Revision$"
|
||
"`python-mode' version number.")
|
||
|
||
;; This software is provided as-is, without express or implied
|
||
;; warranty. Permission to use, copy, modify, distribute or sell this
|
||
;; software, without fee, for any purpose and by any individual or
|
||
;; organization, is hereby granted, provided that the above copyright
|
||
;; notice and this paragraph appear in all copies.
|
||
|
||
;;; Commentary:
|
||
|
||
;; This is a major mode for editing Python programs. It was developed
|
||
;; by Tim Peters after an original idea by Michael A. Guravage. Tim
|
||
;; subsequently left the net; in 1995, Barry Warsaw inherited the mode
|
||
;; and is the current maintainer. Tim's now back but disavows all
|
||
;; responsibility for the mode. Smart Tim :-)
|
||
|
||
;; pdbtrack support contributed by Ken Manheimer, April 2001.
|
||
|
||
;; This version of python-mode.el has only been tested with XEmacs
|
||
;; 21.1.14 and Emacs 20.7 as these are the latest versions of these
|
||
;; Emacsen as of this writing (11-Apr-2001). I have no intent to test
|
||
;; it with earlier Emacsen, but I will accept patches if they are
|
||
;; small and reasonable. Please use the SourceForge Python project to
|
||
;; submit bugs or patches:
|
||
;;
|
||
;; http://sourceforge.net/projects/python
|
||
|
||
;; FOR MORE INFORMATION:
|
||
|
||
;; There is some information on python-mode.el at
|
||
|
||
;; http://www.python.org/emacs/python-mode/
|
||
;;
|
||
;; but this link is fairly out of date, due to the current difficulty
|
||
;; in updating that site. It does contain links to other packages that
|
||
;; you might find useful, such as pdb interfaces, OO-Browser links,
|
||
;; etc. Eventually, we'll be able to update it much more easily.
|
||
|
||
;; BUG REPORTING:
|
||
|
||
;; As mentioned above, please use the SourceForge Python project for
|
||
;; submitting bug reports or patches. The old recommendation, to use
|
||
;; C-c C-b will still work, but those reports have a higher chance of
|
||
;; getting buried in my mailbox. Please include a complete, but
|
||
;; concise code sample and a recipe for reproducing the bug. Send
|
||
;; suggestions and other comments to python-mode@python.org.
|
||
|
||
;; When in a Python mode buffer, do a C-h m for more help. It's
|
||
;; doubtful that a texinfo manual would be very useful, but if you
|
||
;; want to contribute one, I'll certainly accept it!
|
||
|
||
;;; Code:
|
||
|
||
(require 'comint)
|
||
(require 'custom)
|
||
(require 'cl)
|
||
|
||
|
||
;; user definable variables
|
||
;; vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
|
||
|
||
(defgroup python nil
|
||
"Support for the Python programming language, <http://www.python.org/>"
|
||
:group 'languages
|
||
:prefix "py-")
|
||
|
||
(defcustom py-python-command "python"
|
||
"*Shell command used to start Python interpreter."
|
||
:type 'string
|
||
:group 'python)
|
||
|
||
(defcustom py-jpython-command "jpython"
|
||
"*Shell command used to start the JPython interpreter."
|
||
:type 'string
|
||
:group 'python
|
||
:tag "JPython Command")
|
||
|
||
(defcustom py-default-interpreter 'cpython
|
||
"*Which Python interpreter is used by default.
|
||
The value for this variable can be either `cpython' or `jpython'.
|
||
|
||
When the value is `cpython', the variables `py-python-command' and
|
||
`py-python-command-args' are consulted to determine the interpreter
|
||
and arguments to use.
|
||
|
||
When the value is `jpython', the variables `py-jpython-command' and
|
||
`py-jpython-command-args' are consulted to determine the interpreter
|
||
and arguments to use.
|
||
|
||
Note that this variable is consulted only the first time that a Python
|
||
mode buffer is visited during an Emacs session. After that, use
|
||
\\[py-toggle-shells] to change the interpreter shell."
|
||
:type '(choice (const :tag "Python (a.k.a. CPython)" cpython)
|
||
(const :tag "JPython" jpython))
|
||
:group 'python)
|
||
|
||
(defcustom py-python-command-args '("-i")
|
||
"*List of string arguments to be used when starting a Python shell."
|
||
:type '(repeat string)
|
||
:group 'python)
|
||
|
||
(defcustom py-jpython-command-args '("-i")
|
||
"*List of string arguments to be used when starting a JPython shell."
|
||
:type '(repeat string)
|
||
:group 'python
|
||
:tag "JPython Command Args")
|
||
|
||
(defcustom py-indent-offset 4
|
||
"*Amount of offset per level of indentation.
|
||
`\\[py-guess-indent-offset]' can usually guess a good value when
|
||
you're editing someone else's Python code."
|
||
:type 'integer
|
||
:group 'python)
|
||
|
||
(defcustom py-continuation-offset 4
|
||
"*Additional amount of offset to give for some continuation lines.
|
||
Continuation lines are those that immediately follow a backslash
|
||
terminated line. Only those continuation lines for a block opening
|
||
statement are given this extra offset."
|
||
:type 'integer
|
||
:group 'python)
|
||
|
||
(defcustom py-smart-indentation t
|
||
"*Should `python-mode' try to automagically set some indentation variables?
|
||
When this variable is non-nil, two things happen when a buffer is set
|
||
to `python-mode':
|
||
|
||
1. `py-indent-offset' is guessed from existing code in the buffer.
|
||
Only guessed values between 2 and 8 are considered. If a valid
|
||
guess can't be made (perhaps because you are visiting a new
|
||
file), then the value in `py-indent-offset' is used.
|
||
|
||
2. `indent-tabs-mode' is turned off if `py-indent-offset' does not
|
||
equal `tab-width' (`indent-tabs-mode' is never turned on by
|
||
Python mode). This means that for newly written code, tabs are
|
||
only inserted in indentation if one tab is one indentation
|
||
level, otherwise only spaces are used.
|
||
|
||
Note that both these settings occur *after* `python-mode-hook' is run,
|
||
so if you want to defeat the automagic configuration, you must also
|
||
set `py-smart-indentation' to nil in your `python-mode-hook'."
|
||
:type 'boolean
|
||
:group 'python)
|
||
|
||
(defcustom py-align-multiline-strings-p t
|
||
"*Flag describing how multi-line triple quoted strings are aligned.
|
||
When this flag is non-nil, continuation lines are lined up under the
|
||
preceding line's indentation. When this flag is nil, continuation
|
||
lines are aligned to column zero."
|
||
:type '(choice (const :tag "Align under preceding line" t)
|
||
(const :tag "Align to column zero" nil))
|
||
:group 'python)
|
||
|
||
(defcustom py-block-comment-prefix "##"
|
||
"*String used by \\[comment-region] to comment out a block of code.
|
||
This should follow the convention for non-indenting comment lines so
|
||
that the indentation commands won't get confused (i.e., the string
|
||
should be of the form `#x...' where `x' is not a blank or a tab, and
|
||
`...' is arbitrary). However, this string should not end in whitespace."
|
||
:type 'string
|
||
:group 'python)
|
||
|
||
(defcustom py-honor-comment-indentation t
|
||
"*Controls how comment lines influence subsequent indentation.
|
||
|
||
When nil, all comment lines are skipped for indentation purposes, and
|
||
if possible, a faster algorithm is used (i.e. X/Emacs 19 and beyond).
|
||
|
||
When t, lines that begin with a single `#' are a hint to subsequent
|
||
line indentation. If the previous line is such a comment line (as
|
||
opposed to one that starts with `py-block-comment-prefix'), then its
|
||
indentation is used as a hint for this line's indentation. Lines that
|
||
begin with `py-block-comment-prefix' are ignored for indentation
|
||
purposes.
|
||
|
||
When not nil or t, comment lines that begin with a `#' are used as
|
||
indentation hints, unless the comment character is in column zero."
|
||
:type '(choice
|
||
(const :tag "Skip all comment lines (fast)" nil)
|
||
(const :tag "Single # `sets' indentation for next line" t)
|
||
(const :tag "Single # `sets' indentation except at column zero"
|
||
other)
|
||
)
|
||
:group 'python)
|
||
|
||
(defcustom py-temp-directory
|
||
(let ((ok '(lambda (x)
|
||
(and x
|
||
(setq x (expand-file-name x)) ; always true
|
||
(file-directory-p x)
|
||
(file-writable-p x)
|
||
x))))
|
||
(or (funcall ok (getenv "TMPDIR"))
|
||
(funcall ok "/usr/tmp")
|
||
(funcall ok "/tmp")
|
||
(funcall ok ".")
|
||
(error
|
||
"Couldn't find a usable temp directory -- set `py-temp-directory'")))
|
||
"*Directory used for temp files created by a *Python* process.
|
||
By default, the first directory from this list that exists and that you
|
||
can write into: the value (if any) of the environment variable TMPDIR,
|
||
/usr/tmp, /tmp, or the current directory."
|
||
:type 'string
|
||
:group 'python)
|
||
|
||
(defcustom py-beep-if-tab-change t
|
||
"*Ring the bell if `tab-width' is changed.
|
||
If a comment of the form
|
||
|
||
\t# vi:set tabsize=<number>:
|
||
|
||
is found before the first code line when the file is entered, and the
|
||
current value of (the general Emacs variable) `tab-width' does not
|
||
equal <number>, `tab-width' is set to <number>, a message saying so is
|
||
displayed in the echo area, and if `py-beep-if-tab-change' is non-nil
|
||
the Emacs bell is also rung as a warning."
|
||
:type 'boolean
|
||
:group 'python)
|
||
|
||
(defcustom py-jump-on-exception t
|
||
"*Jump to innermost exception frame in *Python Output* buffer.
|
||
When this variable is non-nil and an exception occurs when running
|
||
Python code synchronously in a subprocess, jump immediately to the
|
||
source code of the innermost traceback frame."
|
||
:type 'boolean
|
||
:group 'python)
|
||
|
||
(defcustom py-ask-about-save t
|
||
"If not nil, ask about which buffers to save before executing some code.
|
||
Otherwise, all modified buffers are saved without asking."
|
||
:type 'boolean
|
||
:group 'python)
|
||
|
||
(defcustom py-backspace-function 'backward-delete-char-untabify
|
||
"*Function called by `py-electric-backspace' when deleting backwards."
|
||
:type 'function
|
||
:group 'python)
|
||
|
||
(defcustom py-delete-function 'delete-char
|
||
"*Function called by `py-electric-delete' when deleting forwards."
|
||
:type 'function
|
||
:group 'python)
|
||
|
||
(defcustom py-imenu-show-method-args-p nil
|
||
"*Controls echoing of arguments of functions & methods in the Imenu buffer.
|
||
When non-nil, arguments are printed."
|
||
:type 'boolean
|
||
:group 'python)
|
||
(make-variable-buffer-local 'py-indent-offset)
|
||
|
||
(defcustom py-pdbtrack-do-tracking-p t
|
||
"*Controls whether the pdbtrack feature is enabled or not.
|
||
When non-nil, pdbtrack is enabled in all comint-based buffers,
|
||
e.g. shell buffers and the *Python* buffer. When using pdb to debug a
|
||
Python program, pdbtrack notices the pdb prompt and displays the
|
||
source file and line that the program is stopped at, much the same way
|
||
as gud-mode does for debugging C programs with gdb."
|
||
:type 'boolean
|
||
:group 'python)
|
||
(make-variable-buffer-local 'py-pdbtrack-do-tracking-p)
|
||
|
||
(defcustom py-pdbtrack-minor-mode-string " PDB"
|
||
"*String to use in the minor mode list when pdbtrack is enabled."
|
||
:type 'string
|
||
:group 'python)
|
||
|
||
;; Not customizable
|
||
(defvar py-master-file nil
|
||
"If non-nil, execute the named file instead of the buffer's file.
|
||
The intent is to allow you to set this variable in the file's local
|
||
variable section, e.g.:
|
||
|
||
# Local Variables:
|
||
# py-master-file: \"master.py\"
|
||
# End:
|
||
|
||
so that typing \\[py-execute-buffer] in that buffer executes the named
|
||
master file instead of the buffer's file. If the file name has a
|
||
relative path, the value of variable `default-directory' for the
|
||
buffer is prepended to come up with a file name.")
|
||
(make-variable-buffer-local 'py-master-file)
|
||
|
||
|
||
|
||
;; ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||
;; NO USER DEFINABLE VARIABLES BEYOND THIS POINT
|
||
|
||
(defconst py-emacs-features
|
||
(let (features)
|
||
features)
|
||
"A list of features extant in the Emacs you are using.
|
||
There are many flavors of Emacs out there, with different levels of
|
||
support for features needed by `python-mode'.")
|
||
|
||
(defvar python-font-lock-keywords
|
||
(let ((kw1 (mapconcat 'identity
|
||
'("and" "assert" "break" "class"
|
||
"continue" "def" "del" "elif"
|
||
"else" "except" "exec" "for"
|
||
"from" "global" "if" "import"
|
||
"in" "is" "lambda" "not"
|
||
"or" "pass" "print" "raise"
|
||
"return" "while" "yield"
|
||
)
|
||
"\\|"))
|
||
(kw2 (mapconcat 'identity
|
||
'("else:" "except:" "finally:" "try:")
|
||
"\\|"))
|
||
)
|
||
(list
|
||
;; keywords
|
||
(cons (concat "\\b\\(" kw1 "\\)\\b[ \n\t(]") 1)
|
||
;; block introducing keywords with immediately following colons.
|
||
;; Yes "except" is in both lists.
|
||
(cons (concat "\\b\\(" kw2 "\\)[ \n\t(]") 1)
|
||
;; `as' but only in "import foo as bar"
|
||
'("[ \t]*\\(\\bfrom\\b.*\\)?\\bimport\\b.*\\b\\(as\\)\\b" . 2)
|
||
;; classes
|
||
'("\\bclass[ \t]+\\([a-zA-Z_]+[a-zA-Z0-9_]*\\)"
|
||
1 font-lock-type-face)
|
||
;; functions
|
||
'("\\bdef[ \t]+\\([a-zA-Z_]+[a-zA-Z0-9_]*\\)"
|
||
1 font-lock-function-name-face)
|
||
))
|
||
"Additional expressions to highlight in Python mode.")
|
||
(put 'python-mode 'font-lock-defaults '(python-font-lock-keywords))
|
||
|
||
;; have to bind py-file-queue before installing the kill-emacs-hook
|
||
(defvar py-file-queue nil
|
||
"Queue of Python temp files awaiting execution.
|
||
Currently-active file is at the head of the list.")
|
||
|
||
(defvar py-pdbtrack-is-tracking-p nil)
|
||
|
||
|
||
|
||
;; Constants
|
||
|
||
(defconst py-stringlit-re
|
||
(concat
|
||
;; These fail if backslash-quote ends the string (not worth
|
||
;; fixing?). They precede the short versions so that the first two
|
||
;; quotes don't look like an empty short string.
|
||
;;
|
||
;; (maybe raw), long single quoted triple quoted strings (SQTQ),
|
||
;; with potential embedded single quotes
|
||
"[rR]?'''[^']*\\(\\('[^']\\|''[^']\\)[^']*\\)*'''"
|
||
"\\|"
|
||
;; (maybe raw), long double quoted triple quoted strings (DQTQ),
|
||
;; with potential embedded double quotes
|
||
"[rR]?\"\"\"[^\"]*\\(\\(\"[^\"]\\|\"\"[^\"]\\)[^\"]*\\)*\"\"\""
|
||
"\\|"
|
||
"[rR]?'\\([^'\n\\]\\|\\\\.\\)*'" ; single-quoted
|
||
"\\|" ; or
|
||
"[rR]?\"\\([^\"\n\\]\\|\\\\.\\)*\"" ; double-quoted
|
||
)
|
||
"Regular expression matching a Python string literal.")
|
||
|
||
(defconst py-continued-re
|
||
;; This is tricky because a trailing backslash does not mean
|
||
;; continuation if it's in a comment
|
||
(concat
|
||
"\\(" "[^#'\"\n\\]" "\\|" py-stringlit-re "\\)*"
|
||
"\\\\$")
|
||
"Regular expression matching Python backslash continuation lines.")
|
||
|
||
(defconst py-blank-or-comment-re "[ \t]*\\($\\|#\\)"
|
||
"Regular expression matching a blank or comment line.")
|
||
|
||
(defconst py-outdent-re
|
||
(concat "\\(" (mapconcat 'identity
|
||
'("else:"
|
||
"except\\(\\s +.*\\)?:"
|
||
"finally:"
|
||
"elif\\s +.*:")
|
||
"\\|")
|
||
"\\)")
|
||
"Regular expression matching statements to be dedented one level.")
|
||
|
||
(defconst py-block-closing-keywords-re
|
||
"\\(return\\|raise\\|break\\|continue\\|pass\\)"
|
||
"Regular expression matching keywords which typically close a block.")
|
||
|
||
(defconst py-no-outdent-re
|
||
(concat
|
||
"\\("
|
||
(mapconcat 'identity
|
||
(list "try:"
|
||
"except\\(\\s +.*\\)?:"
|
||
"while\\s +.*:"
|
||
"for\\s +.*:"
|
||
"if\\s +.*:"
|
||
"elif\\s +.*:"
|
||
(concat py-block-closing-keywords-re "[ \t\n]")
|
||
)
|
||
"\\|")
|
||
"\\)")
|
||
"Regular expression matching lines not to dedent after.")
|
||
|
||
(defconst py-defun-start-re
|
||
"^\\([ \t]*\\)def[ \t]+\\([a-zA-Z_0-9]+\\)\\|\\(^[a-zA-Z_0-9]+\\)[ \t]*="
|
||
;; If you change this, you probably have to change py-current-defun
|
||
;; as well. This is only used by py-current-defun to find the name
|
||
;; for add-log.el.
|
||
"Regular expression matching a function, method, or variable assignment.")
|
||
|
||
(defconst py-class-start-re "^class[ \t]*\\([a-zA-Z_0-9]+\\)"
|
||
;; If you change this, you probably have to change py-current-defun
|
||
;; as well. This is only used by py-current-defun to find the name
|
||
;; for add-log.el.
|
||
"Regular expression for finding a class name.")
|
||
|
||
(defconst py-traceback-line-re
|
||
"[ \t]+File \"\\([^\"]+\\)\", line \\([0-9]+\\)"
|
||
"Regular expression that describes tracebacks.")
|
||
|
||
;; pdbtrack contants
|
||
(defconst py-pdbtrack-stack-entry-regexp
|
||
"> \\([^(]+\\)(\\([0-9]+\\))[?a-zA-Z0-9_]+()"
|
||
"Regular expression pdbtrack uses to find a stack trace entry.")
|
||
|
||
(defconst py-pdbtrack-input-prompt "\n[(<]?pdb[>)]? "
|
||
"Regular expression pdbtrack uses to recognize a pdb prompt.")
|
||
|
||
(defconst py-pdbtrack-track-range 10000
|
||
"Max number of characters from end of buffer to search for stack entry.")
|
||
|
||
|
||
|
||
;; Major mode boilerplate
|
||
|
||
;; define a mode-specific abbrev table for those who use such things
|
||
(defvar python-mode-abbrev-table nil
|
||
"Abbrev table in use in `python-mode' buffers.")
|
||
(define-abbrev-table 'python-mode-abbrev-table nil)
|
||
|
||
(defvar python-mode-hook nil
|
||
"*Hook called by `python-mode'.")
|
||
|
||
;; In previous version of python-mode.el, the hook was incorrectly
|
||
;; called py-mode-hook, and was not defvar'd. Deprecate its use.
|
||
(and (fboundp 'make-obsolete-variable)
|
||
(make-obsolete-variable 'py-mode-hook 'python-mode-hook))
|
||
|
||
(defvar py-mode-map ()
|
||
"Keymap used in `python-mode' buffers.")
|
||
(if py-mode-map
|
||
nil
|
||
(setq py-mode-map (make-sparse-keymap))
|
||
;; electric keys
|
||
(define-key py-mode-map ":" 'py-electric-colon)
|
||
;; indentation level modifiers
|
||
(define-key py-mode-map "\C-c\C-l" 'py-shift-region-left)
|
||
(define-key py-mode-map "\C-c\C-r" 'py-shift-region-right)
|
||
(define-key py-mode-map "\C-c<" 'py-shift-region-left)
|
||
(define-key py-mode-map "\C-c>" 'py-shift-region-right)
|
||
;; subprocess commands
|
||
(define-key py-mode-map "\C-c\C-c" 'py-execute-buffer)
|
||
(define-key py-mode-map "\C-c\C-m" 'py-execute-import-or-reload)
|
||
(define-key py-mode-map "\C-c\C-s" 'py-execute-string)
|
||
(define-key py-mode-map "\C-c|" 'py-execute-region)
|
||
(define-key py-mode-map "\e\C-x" 'py-execute-def-or-class)
|
||
(define-key py-mode-map "\C-c!" 'py-shell)
|
||
(define-key py-mode-map "\C-c\C-t" 'py-toggle-shells)
|
||
;; Caution! Enter here at your own risk. We are trying to support
|
||
;; several behaviors and it gets disgusting. :-( This logic ripped
|
||
;; largely from CC Mode.
|
||
;;
|
||
;; In XEmacs 19, Emacs 19, and Emacs 20, we use this to bind
|
||
;; backwards deletion behavior to DEL, which both Delete and
|
||
;; Backspace get translated to. There's no way to separate this
|
||
;; behavior in a clean way, so deal with it! Besides, it's been
|
||
;; this way since the dawn of time.
|
||
(if (not (boundp 'delete-key-deletes-forward))
|
||
(define-key py-mode-map "\177" 'py-electric-backspace)
|
||
;; However, XEmacs 20 actually achieved enlightenment. It is
|
||
;; possible to sanely define both backward and forward deletion
|
||
;; behavior under X separately (TTYs are forever beyond hope, but
|
||
;; who cares? XEmacs 20 does the right thing with these too).
|
||
(define-key py-mode-map [delete] 'py-electric-delete)
|
||
(define-key py-mode-map [backspace] 'py-electric-backspace))
|
||
;; Separate M-BS from C-M-h. The former should remain
|
||
;; backward-kill-word.
|
||
(define-key py-mode-map [(control meta h)] 'py-mark-def-or-class)
|
||
(define-key py-mode-map "\C-c\C-k" 'py-mark-block)
|
||
;; Miscellaneous
|
||
(define-key py-mode-map "\C-c:" 'py-guess-indent-offset)
|
||
(define-key py-mode-map "\C-c\t" 'py-indent-region)
|
||
(define-key py-mode-map "\C-c\C-d" 'py-pdbtrack-toggle-stack-tracking)
|
||
(define-key py-mode-map "\C-c\C-n" 'py-next-statement)
|
||
(define-key py-mode-map "\C-c\C-p" 'py-previous-statement)
|
||
(define-key py-mode-map "\C-c\C-u" 'py-goto-block-up)
|
||
(define-key py-mode-map "\C-c#" 'py-comment-region)
|
||
(define-key py-mode-map "\C-c?" 'py-describe-mode)
|
||
(define-key py-mode-map "\C-c\C-hm" 'py-describe-mode)
|
||
(define-key py-mode-map "\e\C-a" 'py-beginning-of-def-or-class)
|
||
(define-key py-mode-map "\e\C-e" 'py-end-of-def-or-class)
|
||
(define-key py-mode-map "\C-c-" 'py-up-exception)
|
||
(define-key py-mode-map "\C-c=" 'py-down-exception)
|
||
;; stuff that is `standard' but doesn't interface well with
|
||
;; python-mode, which forces us to rebind to special commands
|
||
(define-key py-mode-map "\C-xnd" 'py-narrow-to-defun)
|
||
;; information
|
||
(define-key py-mode-map "\C-c\C-b" 'py-submit-bug-report)
|
||
(define-key py-mode-map "\C-c\C-v" 'py-version)
|
||
;; shadow global bindings for newline-and-indent w/ the py- version.
|
||
;; BAW - this is extremely bad form, but I'm not going to change it
|
||
;; for now.
|
||
(mapcar #'(lambda (key)
|
||
(define-key py-mode-map key 'py-newline-and-indent))
|
||
(where-is-internal 'newline-and-indent))
|
||
;; Force RET to be py-newline-and-indent even if it didn't get
|
||
;; mapped by the above code. motivation: Emacs' default binding for
|
||
;; RET is `newline' and C-j is `newline-and-indent'. Most Pythoneers
|
||
;; expect RET to do a `py-newline-and-indent' and any Emacsers who
|
||
;; dislike this are probably knowledgeable enough to do a rebind.
|
||
;; However, we do *not* change C-j since many Emacsers have already
|
||
;; swapped RET and C-j and they don't want C-j bound to `newline' to
|
||
;; change.
|
||
(define-key py-mode-map "\C-m" 'py-newline-and-indent)
|
||
)
|
||
|
||
(defvar py-mode-output-map nil
|
||
"Keymap used in *Python Output* buffers.")
|
||
(if py-mode-output-map
|
||
nil
|
||
(setq py-mode-output-map (make-sparse-keymap))
|
||
(define-key py-mode-output-map [button2] 'py-mouseto-exception)
|
||
(define-key py-mode-output-map "\C-c\C-c" 'py-goto-exception)
|
||
;; TBD: Disable all self-inserting keys. This is bogus, we should
|
||
;; really implement this as *Python Output* buffer being read-only
|
||
(mapcar #' (lambda (key)
|
||
(define-key py-mode-output-map key
|
||
#'(lambda () (interactive) (beep))))
|
||
(where-is-internal 'self-insert-command))
|
||
)
|
||
|
||
(defvar py-shell-map nil
|
||
"Keymap used in *Python* shell buffers.")
|
||
(if py-shell-map
|
||
nil
|
||
(setq py-shell-map (copy-keymap comint-mode-map))
|
||
(define-key py-shell-map [tab] 'tab-to-tab-stop)
|
||
(define-key py-shell-map "\C-c-" 'py-up-exception)
|
||
(define-key py-shell-map "\C-c=" 'py-down-exception)
|
||
)
|
||
|
||
(defvar py-mode-syntax-table nil
|
||
"Syntax table used in `python-mode' buffers.")
|
||
(if py-mode-syntax-table
|
||
nil
|
||
(setq py-mode-syntax-table (make-syntax-table))
|
||
(modify-syntax-entry ?\( "()" py-mode-syntax-table)
|
||
(modify-syntax-entry ?\) ")(" py-mode-syntax-table)
|
||
(modify-syntax-entry ?\[ "(]" py-mode-syntax-table)
|
||
(modify-syntax-entry ?\] ")[" py-mode-syntax-table)
|
||
(modify-syntax-entry ?\{ "(}" py-mode-syntax-table)
|
||
(modify-syntax-entry ?\} "){" py-mode-syntax-table)
|
||
;; Add operator symbols misassigned in the std table
|
||
(modify-syntax-entry ?\$ "." py-mode-syntax-table)
|
||
(modify-syntax-entry ?\% "." py-mode-syntax-table)
|
||
(modify-syntax-entry ?\& "." py-mode-syntax-table)
|
||
(modify-syntax-entry ?\* "." py-mode-syntax-table)
|
||
(modify-syntax-entry ?\+ "." py-mode-syntax-table)
|
||
(modify-syntax-entry ?\- "." py-mode-syntax-table)
|
||
(modify-syntax-entry ?\/ "." py-mode-syntax-table)
|
||
(modify-syntax-entry ?\< "." py-mode-syntax-table)
|
||
(modify-syntax-entry ?\= "." py-mode-syntax-table)
|
||
(modify-syntax-entry ?\> "." py-mode-syntax-table)
|
||
(modify-syntax-entry ?\| "." py-mode-syntax-table)
|
||
;; For historical reasons, underscore is word class instead of
|
||
;; symbol class. GNU conventions say it should be symbol class, but
|
||
;; there's a natural conflict between what major mode authors want
|
||
;; and what users expect from `forward-word' and `backward-word'.
|
||
;; Guido and I have hashed this out and have decided to keep
|
||
;; underscore in word class. If you're tempted to change it, try
|
||
;; binding M-f and M-b to py-forward-into-nomenclature and
|
||
;; py-backward-into-nomenclature instead. This doesn't help in all
|
||
;; situations where you'd want the different behavior
|
||
;; (e.g. backward-kill-word).
|
||
(modify-syntax-entry ?\_ "w" py-mode-syntax-table)
|
||
;; Both single quote and double quote are string delimiters
|
||
(modify-syntax-entry ?\' "\"" py-mode-syntax-table)
|
||
(modify-syntax-entry ?\" "\"" py-mode-syntax-table)
|
||
;; backquote is open and close paren
|
||
(modify-syntax-entry ?\` "$" py-mode-syntax-table)
|
||
;; comment delimiters
|
||
(modify-syntax-entry ?\# "<" py-mode-syntax-table)
|
||
(modify-syntax-entry ?\n ">" py-mode-syntax-table)
|
||
)
|
||
|
||
|
||
|
||
;; Utilities
|
||
|
||
(defmacro py-safe (&rest body)
|
||
"Safely execute BODY, return nil if an error occurred."
|
||
(` (condition-case nil
|
||
(progn (,@ body))
|
||
(error nil))))
|
||
|
||
(defsubst py-keep-region-active ()
|
||
"Keep the region active in XEmacs."
|
||
;; Ignore byte-compiler warnings you might see. Also note that
|
||
;; FSF's Emacs 19 does it differently; its policy doesn't require us
|
||
;; to take explicit action.
|
||
(and (boundp 'zmacs-region-stays)
|
||
(setq zmacs-region-stays t)))
|
||
|
||
(defsubst py-point (position)
|
||
"Returns the value of point at certain commonly referenced POSITIONs.
|
||
POSITION can be one of the following symbols:
|
||
|
||
bol -- beginning of line
|
||
eol -- end of line
|
||
bod -- beginning of def or class
|
||
eod -- end of def or class
|
||
bob -- beginning of buffer
|
||
eob -- end of buffer
|
||
boi -- back to indentation
|
||
bos -- beginning of statement
|
||
|
||
This function does not modify point or mark."
|
||
(let ((here (point)))
|
||
(cond
|
||
((eq position 'bol) (beginning-of-line))
|
||
((eq position 'eol) (end-of-line))
|
||
((eq position 'bod) (py-beginning-of-def-or-class))
|
||
((eq position 'eod) (py-end-of-def-or-class))
|
||
;; Kind of funny, I know, but useful for py-up-exception.
|
||
((eq position 'bob) (beginning-of-buffer))
|
||
((eq position 'eob) (end-of-buffer))
|
||
((eq position 'boi) (back-to-indentation))
|
||
((eq position 'bos) (py-goto-initial-line))
|
||
(t (error "Unknown buffer position requested: %s" position))
|
||
)
|
||
(prog1
|
||
(point)
|
||
(goto-char here))))
|
||
|
||
(defsubst py-highlight-line (from to file line)
|
||
(cond
|
||
((fboundp 'make-extent)
|
||
;; XEmacs
|
||
(let ((e (make-extent from to)))
|
||
(set-extent-property e 'mouse-face 'highlight)
|
||
(set-extent-property e 'py-exc-info (cons file line))
|
||
(set-extent-property e 'keymap py-mode-output-map)))
|
||
(t
|
||
;; Emacs -- Please port this!
|
||
)
|
||
))
|
||
|
||
(defun py-in-literal (&optional lim)
|
||
"Return non-nil if point is in a Python literal (a comment or string).
|
||
Optional argument LIM indicates the beginning of the containing form,
|
||
i.e. the limit on how far back to scan."
|
||
;; This is the version used for non-XEmacs, which has a nicer
|
||
;; interface.
|
||
;;
|
||
;; WARNING: Watch out for infinite recursion.
|
||
(let* ((lim (or lim (py-point 'bod)))
|
||
(state (parse-partial-sexp lim (point))))
|
||
(cond
|
||
((nth 3 state) 'string)
|
||
((nth 4 state) 'comment)
|
||
(t nil))))
|
||
|
||
;; XEmacs has a built-in function that should make this much quicker.
|
||
;; In this case, lim is ignored
|
||
(defun py-fast-in-literal (&optional lim)
|
||
"Fast version of `py-in-literal', used only by XEmacs.
|
||
Optional LIM is ignored."
|
||
;; don't have to worry about context == 'block-comment
|
||
(buffer-syntactic-context))
|
||
|
||
(if (fboundp 'buffer-syntactic-context)
|
||
(defalias 'py-in-literal 'py-fast-in-literal))
|
||
|
||
|
||
|
||
;; Menu definitions, only relevent if you have the easymenu.el package
|
||
;; (standard in the latest Emacs 19 and XEmacs 19 distributions).
|
||
(defvar py-menu nil
|
||
"Menu for Python Mode.
|
||
This menu will get created automatically if you have the `easymenu'
|
||
package. Note that the latest X/Emacs releases contain this package.")
|
||
|
||
(and (py-safe (require 'easymenu) t)
|
||
(easy-menu-define
|
||
py-menu py-mode-map "Python Mode menu"
|
||
'("Python"
|
||
["Comment Out Region" py-comment-region (mark)]
|
||
["Uncomment Region" (py-comment-region (point) (mark) '(4)) (mark)]
|
||
"-"
|
||
["Mark current block" py-mark-block t]
|
||
["Mark current def" py-mark-def-or-class t]
|
||
["Mark current class" (py-mark-def-or-class t) t]
|
||
"-"
|
||
["Shift region left" py-shift-region-left (mark)]
|
||
["Shift region right" py-shift-region-right (mark)]
|
||
"-"
|
||
["Import/reload file" py-execute-import-or-reload t]
|
||
["Execute buffer" py-execute-buffer t]
|
||
["Execute region" py-execute-region (mark)]
|
||
["Execute def or class" py-execute-def-or-class (mark)]
|
||
["Execute string" py-execute-string t]
|
||
["Start interpreter..." py-shell t]
|
||
"-"
|
||
["Go to start of block" py-goto-block-up t]
|
||
["Go to start of class" (py-beginning-of-def-or-class t) t]
|
||
["Move to end of class" (py-end-of-def-or-class t) t]
|
||
["Move to start of def" py-beginning-of-def-or-class t]
|
||
["Move to end of def" py-end-of-def-or-class t]
|
||
"-"
|
||
["Describe mode" py-describe-mode t]
|
||
)))
|
||
|
||
|
||
|
||
;; Imenu definitions
|
||
(defvar py-imenu-class-regexp
|
||
(concat ; <<classes>>
|
||
"\\(" ;
|
||
"^[ \t]*" ; newline and maybe whitespace
|
||
"\\(class[ \t]+[a-zA-Z0-9_]+\\)" ; class name
|
||
; possibly multiple superclasses
|
||
"\\([ \t]*\\((\\([a-zA-Z0-9_,. \t\n]\\)*)\\)?\\)"
|
||
"[ \t]*:" ; and the final :
|
||
"\\)" ; >>classes<<
|
||
)
|
||
"Regexp for Python classes for use with the Imenu package."
|
||
)
|
||
|
||
(defvar py-imenu-method-regexp
|
||
(concat ; <<methods and functions>>
|
||
"\\(" ;
|
||
"^[ \t]*" ; new line and maybe whitespace
|
||
"\\(def[ \t]+" ; function definitions start with def
|
||
"\\([a-zA-Z0-9_]+\\)" ; name is here
|
||
; function arguments...
|
||
;; "[ \t]*(\\([-+/a-zA-Z0-9_=,\* \t\n.()\"'#]*\\))"
|
||
"[ \t]*(\\([^:#]*\\))"
|
||
"\\)" ; end of def
|
||
"[ \t]*:" ; and then the :
|
||
"\\)" ; >>methods and functions<<
|
||
)
|
||
"Regexp for Python methods/functions for use with the Imenu package."
|
||
)
|
||
|
||
(defvar py-imenu-method-no-arg-parens '(2 8)
|
||
"Indices into groups of the Python regexp for use with Imenu.
|
||
|
||
Using these values will result in smaller Imenu lists, as arguments to
|
||
functions are not listed.
|
||
|
||
See the variable `py-imenu-show-method-args-p' for more
|
||
information.")
|
||
|
||
(defvar py-imenu-method-arg-parens '(2 7)
|
||
"Indices into groups of the Python regexp for use with imenu.
|
||
Using these values will result in large Imenu lists, as arguments to
|
||
functions are listed.
|
||
|
||
See the variable `py-imenu-show-method-args-p' for more
|
||
information.")
|
||
|
||
;; Note that in this format, this variable can still be used with the
|
||
;; imenu--generic-function. Otherwise, there is no real reason to have
|
||
;; it.
|
||
(defvar py-imenu-generic-expression
|
||
(cons
|
||
(concat
|
||
py-imenu-class-regexp
|
||
"\\|" ; or...
|
||
py-imenu-method-regexp
|
||
)
|
||
py-imenu-method-no-arg-parens)
|
||
"Generic Python expression which may be used directly with Imenu.
|
||
Used by setting the variable `imenu-generic-expression' to this value.
|
||
Also, see the function \\[py-imenu-create-index] for a better
|
||
alternative for finding the index.")
|
||
|
||
;; These next two variables are used when searching for the Python
|
||
;; class/definitions. Just saving some time in accessing the
|
||
;; generic-python-expression, really.
|
||
(defvar py-imenu-generic-regexp nil)
|
||
(defvar py-imenu-generic-parens nil)
|
||
|
||
|
||
(defun py-imenu-create-index-function ()
|
||
"Python interface function for the Imenu package.
|
||
Finds all Python classes and functions/methods. Calls function
|
||
\\[py-imenu-create-index-engine]. See that function for the details
|
||
of how this works."
|
||
(setq py-imenu-generic-regexp (car py-imenu-generic-expression)
|
||
py-imenu-generic-parens (if py-imenu-show-method-args-p
|
||
py-imenu-method-arg-parens
|
||
py-imenu-method-no-arg-parens))
|
||
(goto-char (point-min))
|
||
;; Warning: When the buffer has no classes or functions, this will
|
||
;; return nil, which seems proper according to the Imenu API, but
|
||
;; causes an error in the XEmacs port of Imenu. Sigh.
|
||
(py-imenu-create-index-engine nil))
|
||
|
||
(defun py-imenu-create-index-engine (&optional start-indent)
|
||
"Function for finding Imenu definitions in Python.
|
||
|
||
Finds all definitions (classes, methods, or functions) in a Python
|
||
file for the Imenu package.
|
||
|
||
Returns a possibly nested alist of the form
|
||
|
||
(INDEX-NAME . INDEX-POSITION)
|
||
|
||
The second element of the alist may be an alist, producing a nested
|
||
list as in
|
||
|
||
(INDEX-NAME . INDEX-ALIST)
|
||
|
||
This function should not be called directly, as it calls itself
|
||
recursively and requires some setup. Rather this is the engine for
|
||
the function \\[py-imenu-create-index-function].
|
||
|
||
It works recursively by looking for all definitions at the current
|
||
indention level. When it finds one, it adds it to the alist. If it
|
||
finds a definition at a greater indentation level, it removes the
|
||
previous definition from the alist. In its place it adds all
|
||
definitions found at the next indentation level. When it finds a
|
||
definition that is less indented then the current level, it returns
|
||
the alist it has created thus far.
|
||
|
||
The optional argument START-INDENT indicates the starting indentation
|
||
at which to continue looking for Python classes, methods, or
|
||
functions. If this is not supplied, the function uses the indentation
|
||
of the first definition found."
|
||
(let (index-alist
|
||
sub-method-alist
|
||
looking-p
|
||
def-name prev-name
|
||
cur-indent def-pos
|
||
(class-paren (first py-imenu-generic-parens))
|
||
(def-paren (second py-imenu-generic-parens)))
|
||
(setq looking-p
|
||
(re-search-forward py-imenu-generic-regexp (point-max) t))
|
||
(while looking-p
|
||
(save-excursion
|
||
;; used to set def-name to this value but generic-extract-name
|
||
;; is new to imenu-1.14. this way it still works with
|
||
;; imenu-1.11
|
||
;;(imenu--generic-extract-name py-imenu-generic-parens))
|
||
(let ((cur-paren (if (match-beginning class-paren)
|
||
class-paren def-paren)))
|
||
(setq def-name
|
||
(buffer-substring-no-properties (match-beginning cur-paren)
|
||
(match-end cur-paren))))
|
||
(save-match-data
|
||
(py-beginning-of-def-or-class 'either))
|
||
(beginning-of-line)
|
||
(setq cur-indent (current-indentation)))
|
||
;; HACK: want to go to the next correct definition location. We
|
||
;; explicitly list them here but it would be better to have them
|
||
;; in a list.
|
||
(setq def-pos
|
||
(or (match-beginning class-paren)
|
||
(match-beginning def-paren)))
|
||
;; if we don't have a starting indent level, take this one
|
||
(or start-indent
|
||
(setq start-indent cur-indent))
|
||
;; if we don't have class name yet, take this one
|
||
(or prev-name
|
||
(setq prev-name def-name))
|
||
;; what level is the next definition on? must be same, deeper
|
||
;; or shallower indentation
|
||
(cond
|
||
;; at the same indent level, add it to the list...
|
||
((= start-indent cur-indent)
|
||
(push (cons def-name def-pos) index-alist))
|
||
;; deeper indented expression, recurse
|
||
((< start-indent cur-indent)
|
||
;; the point is currently on the expression we're supposed to
|
||
;; start on, so go back to the last expression. The recursive
|
||
;; call will find this place again and add it to the correct
|
||
;; list
|
||
(re-search-backward py-imenu-generic-regexp (point-min) 'move)
|
||
(setq sub-method-alist (py-imenu-create-index-engine cur-indent))
|
||
(if sub-method-alist
|
||
;; we put the last element on the index-alist on the start
|
||
;; of the submethod alist so the user can still get to it.
|
||
(let ((save-elmt (pop index-alist)))
|
||
(push (cons prev-name
|
||
(cons save-elmt sub-method-alist))
|
||
index-alist))))
|
||
;; found less indented expression, we're done.
|
||
(t
|
||
(setq looking-p nil)
|
||
(re-search-backward py-imenu-generic-regexp (point-min) t)))
|
||
;; end-cond
|
||
(setq prev-name def-name)
|
||
(and looking-p
|
||
(setq looking-p
|
||
(re-search-forward py-imenu-generic-regexp
|
||
(point-max) 'move))))
|
||
(nreverse index-alist)))
|
||
|
||
|
||
;;;###autoload
|
||
(defun python-mode ()
|
||
"Major mode for editing Python files.
|
||
To submit a problem report, enter `\\[py-submit-bug-report]' from a
|
||
`python-mode' buffer. Do `\\[py-describe-mode]' for detailed
|
||
documentation. To see what version of `python-mode' you are running,
|
||
enter `\\[py-version]'.
|
||
|
||
This mode knows about Python indentation, tokens, comments and
|
||
continuation lines. Paragraphs are separated by blank lines only.
|
||
|
||
COMMANDS
|
||
\\{py-mode-map}
|
||
VARIABLES
|
||
|
||
py-indent-offset\t\tindentation increment
|
||
py-block-comment-prefix\t\tcomment string used by `comment-region'
|
||
py-python-command\t\tshell command to invoke Python interpreter
|
||
py-temp-directory\t\tdirectory used for temp files (if needed)
|
||
py-beep-if-tab-change\t\tring the bell if `tab-width' is changed"
|
||
(interactive)
|
||
;; set up local variables
|
||
(kill-all-local-variables)
|
||
(make-local-variable 'font-lock-defaults)
|
||
(make-local-variable 'paragraph-separate)
|
||
(make-local-variable 'paragraph-start)
|
||
(make-local-variable 'require-final-newline)
|
||
(make-local-variable 'comment-start)
|
||
(make-local-variable 'comment-end)
|
||
(make-local-variable 'comment-start-skip)
|
||
(make-local-variable 'comment-column)
|
||
(make-local-variable 'comment-indent-function)
|
||
(make-local-variable 'indent-region-function)
|
||
(make-local-variable 'indent-line-function)
|
||
(make-local-variable 'add-log-current-defun-function)
|
||
;;
|
||
(set-syntax-table py-mode-syntax-table)
|
||
(setq major-mode 'python-mode
|
||
mode-name "Python"
|
||
local-abbrev-table python-mode-abbrev-table
|
||
font-lock-defaults '(python-font-lock-keywords)
|
||
paragraph-separate "^[ \t]*$"
|
||
paragraph-start "^[ \t]*$"
|
||
require-final-newline t
|
||
comment-start "# "
|
||
comment-end ""
|
||
comment-start-skip "# *"
|
||
comment-column 40
|
||
comment-indent-function 'py-comment-indent-function
|
||
indent-region-function 'py-indent-region
|
||
indent-line-function 'py-indent-line
|
||
;; tell add-log.el how to find the current function/method/variable
|
||
add-log-current-defun-function 'py-current-defun
|
||
)
|
||
(use-local-map py-mode-map)
|
||
;; add the menu
|
||
(if py-menu
|
||
(easy-menu-add py-menu))
|
||
;; Emacs 19 requires this
|
||
(if (boundp 'comment-multi-line)
|
||
(setq comment-multi-line nil))
|
||
;; Install Imenu if available
|
||
(when (py-safe (require 'imenu))
|
||
(setq imenu-create-index-function #'py-imenu-create-index-function)
|
||
(setq imenu-generic-expression py-imenu-generic-expression)
|
||
(if (fboundp 'imenu-add-to-menubar)
|
||
(imenu-add-to-menubar (format "%s-%s" "IM" mode-name)))
|
||
)
|
||
;; Run the mode hook. Note that py-mode-hook is deprecated.
|
||
(if python-mode-hook
|
||
(run-hooks 'python-mode-hook)
|
||
(run-hooks 'py-mode-hook))
|
||
;; Now do the automagical guessing
|
||
(if py-smart-indentation
|
||
(let ((offset py-indent-offset))
|
||
;; It's okay if this fails to guess a good value
|
||
(if (and (py-safe (py-guess-indent-offset))
|
||
(<= py-indent-offset 8)
|
||
(>= py-indent-offset 2))
|
||
(setq offset py-indent-offset))
|
||
(setq py-indent-offset offset)
|
||
;; Only turn indent-tabs-mode off if tab-width !=
|
||
;; py-indent-offset. Never turn it on, because the user must
|
||
;; have explicitly turned it off.
|
||
(if (/= tab-width py-indent-offset)
|
||
(setq indent-tabs-mode nil))
|
||
))
|
||
;; Set the default shell if not already set
|
||
(when (null py-which-shell)
|
||
(py-toggle-shells py-default-interpreter))
|
||
)
|
||
|
||
|
||
;; electric characters
|
||
(defun py-outdent-p ()
|
||
"Returns non-nil if the current line should dedent one level."
|
||
(save-excursion
|
||
(and (progn (back-to-indentation)
|
||
(looking-at py-outdent-re))
|
||
;; short circuit infloop on illegal construct
|
||
(not (bobp))
|
||
(progn (forward-line -1)
|
||
(py-goto-initial-line)
|
||
(back-to-indentation)
|
||
(while (or (looking-at py-blank-or-comment-re)
|
||
(bobp))
|
||
(backward-to-indentation 1))
|
||
(not (looking-at py-no-outdent-re)))
|
||
)))
|
||
|
||
(defun py-electric-colon (arg)
|
||
"Insert a colon.
|
||
In certain cases the line is dedented appropriately. If a numeric
|
||
argument ARG is provided, that many colons are inserted
|
||
non-electrically. Electric behavior is inhibited inside a string or
|
||
comment."
|
||
(interactive "P")
|
||
(self-insert-command (prefix-numeric-value arg))
|
||
;; are we in a string or comment?
|
||
(if (save-excursion
|
||
(let ((pps (parse-partial-sexp (save-excursion
|
||
(py-beginning-of-def-or-class)
|
||
(point))
|
||
(point))))
|
||
(not (or (nth 3 pps) (nth 4 pps)))))
|
||
(save-excursion
|
||
(let ((here (point))
|
||
(outdent 0)
|
||
(indent (py-compute-indentation t)))
|
||
(if (and (not arg)
|
||
(py-outdent-p)
|
||
(= indent (save-excursion
|
||
(py-next-statement -1)
|
||
(py-compute-indentation t)))
|
||
)
|
||
(setq outdent py-indent-offset))
|
||
;; Don't indent, only dedent. This assumes that any lines
|
||
;; that are already dedented relative to
|
||
;; py-compute-indentation were put there on purpose. It's
|
||
;; highly annoying to have `:' indent for you. Use TAB, C-c
|
||
;; C-l or C-c C-r to adjust. TBD: Is there a better way to
|
||
;; determine this???
|
||
(if (< (current-indentation) indent) nil
|
||
(goto-char here)
|
||
(beginning-of-line)
|
||
(delete-horizontal-space)
|
||
(indent-to (- indent outdent))
|
||
)))))
|
||
|
||
|
||
;; Python subprocess utilities and filters
|
||
(defun py-execute-file (proc filename)
|
||
"Send to Python interpreter process PROC \"execfile('FILENAME')\".
|
||
Make that process's buffer visible and force display. Also make
|
||
comint believe the user typed this string so that
|
||
`kill-output-from-shell' does The Right Thing."
|
||
(let ((curbuf (current-buffer))
|
||
(procbuf (process-buffer proc))
|
||
; (comint-scroll-to-bottom-on-output t)
|
||
(msg (format "## working on region in file %s...\n" filename))
|
||
(cmd (format "execfile(r'%s')\n" filename)))
|
||
(unwind-protect
|
||
(save-excursion
|
||
(set-buffer procbuf)
|
||
(goto-char (point-max))
|
||
(move-marker (process-mark proc) (point))
|
||
(funcall (process-filter proc) proc msg))
|
||
(set-buffer curbuf))
|
||
(process-send-string proc cmd)))
|
||
|
||
(defun py-comint-output-filter-function (string)
|
||
"Watch output for Python prompt and exec next file waiting in queue.
|
||
This function is appropriate for `comint-output-filter-functions'."
|
||
;; TBD: this should probably use split-string
|
||
(when (and (or (string-equal string ">>> ")
|
||
(and (>= (length string) 5)
|
||
(string-equal (substring string -5) "\n>>> ")))
|
||
py-file-queue)
|
||
(py-safe (delete-file (car py-file-queue)))
|
||
(setq py-file-queue (cdr py-file-queue))
|
||
(if py-file-queue
|
||
(let ((pyproc (get-buffer-process (current-buffer))))
|
||
(py-execute-file pyproc (car py-file-queue))))
|
||
))
|
||
|
||
(defun py-pdbtrack-overlay-arrow (activation)
|
||
"Activate or de arrow at beginning-of-line in current buffer."
|
||
;; This was derived/simplified from edebug-overlay-arrow
|
||
(cond (activation
|
||
(setq overlay-arrow-position (make-marker))
|
||
(setq overlay-arrow-string "=>")
|
||
(set-marker overlay-arrow-position (py-point 'bol) (current-buffer))
|
||
(setq py-pdbtrack-is-tracking-p t))
|
||
(overlay-arrow-position
|
||
(setq overlay-arrow-position nil)
|
||
(setq py-pdbtrack-is-tracking-p nil))
|
||
))
|
||
|
||
(defun py-pdbtrack-track-stack-file (text)
|
||
"Show the file indicated by the pdb stack entry line, in a separate window.
|
||
|
||
Activity is disabled if the buffer-local variable
|
||
`py-pdbtrack-do-tracking-p' is nil.
|
||
|
||
We depend on the pdb input prompt matching `py-pdbtrack-input-prompt'
|
||
at the beginning of the line."
|
||
;; Instead of trying to piece things together from partial text
|
||
;; (which can be almost useless depending on Emacs version), we
|
||
;; monitor to the point where we have the next pdb prompt, and then
|
||
;; check all text from comint-last-input-end to process-mark.
|
||
;;
|
||
;; KLM: It might be nice to provide an optional override, so this
|
||
;; routine could be fed debugger output strings as the text
|
||
;; argument, for deliberate application elsewhere.
|
||
;;
|
||
;; KLM: We're very conservative about clearing the overlay arrow, to
|
||
;; minimize residue. This means, for instance, that executing other
|
||
;; pdb commands wipes out the highlight.
|
||
(let* ((origbuf (current-buffer))
|
||
(currproc (get-buffer-process origbuf)))
|
||
(if (not (and currproc py-pdbtrack-do-tracking-p))
|
||
(py-pdbtrack-overlay-arrow nil)
|
||
(let* (;(origdir default-directory)
|
||
(procmark (process-mark currproc))
|
||
(block (buffer-substring (max comint-last-input-end
|
||
(- procmark
|
||
py-pdbtrack-track-range))
|
||
procmark))
|
||
fname lineno)
|
||
(if (not (string-match (concat py-pdbtrack-input-prompt "$") block))
|
||
(py-pdbtrack-overlay-arrow nil)
|
||
(if (not (string-match
|
||
(concat ".*" py-pdbtrack-stack-entry-regexp ".*")
|
||
block))
|
||
(py-pdbtrack-overlay-arrow nil)
|
||
(setq fname (match-string 1 block)
|
||
lineno (match-string 2 block))
|
||
(if (file-exists-p fname)
|
||
(progn
|
||
(find-file-other-window fname)
|
||
(goto-line (string-to-int lineno))
|
||
(message "pdbtrack: line %s, file %s" lineno fname)
|
||
(py-pdbtrack-overlay-arrow t)
|
||
(pop-to-buffer origbuf t) )
|
||
(if (= (elt fname 0) ?\<)
|
||
(message "pdbtrack: (Non-file source: '%s')" fname)
|
||
(message "pdbtrack: File not found: %s" fname))
|
||
)))))))
|
||
|
||
(defun py-postprocess-output-buffer (buf)
|
||
"Highlight exceptions found in BUF.
|
||
If an exception occurred return t, otherwise return nil. BUF must exist."
|
||
(let (line file bol err-p)
|
||
(save-excursion
|
||
(set-buffer buf)
|
||
(beginning-of-buffer)
|
||
(while (re-search-forward py-traceback-line-re nil t)
|
||
(setq file (match-string 1)
|
||
line (string-to-int (match-string 2))
|
||
bol (py-point 'bol))
|
||
(py-highlight-line bol (py-point 'eol) file line)))
|
||
(when (and py-jump-on-exception line)
|
||
(beep)
|
||
(py-jump-to-exception file line)
|
||
(setq err-p t))
|
||
err-p))
|
||
|
||
|
||
|
||
;;; Subprocess commands
|
||
|
||
;; only used when (memq 'broken-temp-names py-emacs-features)
|
||
(defvar py-serial-number 0)
|
||
(defvar py-exception-buffer nil)
|
||
(defconst py-output-buffer "*Python Output*")
|
||
(make-variable-buffer-local 'py-output-buffer)
|
||
|
||
;; for toggling between CPython and JPython
|
||
(defvar py-which-shell nil)
|
||
(defvar py-which-args py-python-command-args)
|
||
(defvar py-which-bufname "Python")
|
||
(make-variable-buffer-local 'py-which-shell)
|
||
(make-variable-buffer-local 'py-which-args)
|
||
(make-variable-buffer-local 'py-which-bufname)
|
||
|
||
(defun py-toggle-shells (arg)
|
||
"Toggles between the CPython and JPython shells.
|
||
|
||
With positive argument ARG (interactively \\[universal-argument]),
|
||
uses the CPython shell, with negative ARG uses the JPython shell, and
|
||
with a zero argument, toggles the shell.
|
||
|
||
Programmatically, ARG can also be one of the symbols `cpython' or
|
||
`jpython', equivalent to positive arg and negative arg respectively."
|
||
(interactive "P")
|
||
;; default is to toggle
|
||
(if (null arg)
|
||
(setq arg 0))
|
||
;; preprocess arg
|
||
(cond
|
||
((equal arg 0)
|
||
;; toggle
|
||
(if (string-equal py-which-bufname "Python")
|
||
(setq arg -1)
|
||
(setq arg 1)))
|
||
((equal arg 'cpython) (setq arg 1))
|
||
((equal arg 'jpython) (setq arg -1)))
|
||
(let (msg)
|
||
(cond
|
||
((< 0 arg)
|
||
;; set to CPython
|
||
(setq py-which-shell py-python-command
|
||
py-which-args py-python-command-args
|
||
py-which-bufname "Python"
|
||
msg "CPython"
|
||
mode-name "Python"))
|
||
((> 0 arg)
|
||
(setq py-which-shell py-jpython-command
|
||
py-which-args py-jpython-command-args
|
||
py-which-bufname "JPython"
|
||
msg "JPython"
|
||
mode-name "JPython"))
|
||
)
|
||
(message "Using the %s shell" msg)
|
||
(setq py-output-buffer (format "*%s Output*" py-which-bufname))))
|
||
|
||
;;;###autoload
|
||
(defun py-shell (&optional argprompt)
|
||
"Start an interactive Python interpreter in another window.
|
||
This is like Shell mode, except that Python is running in the window
|
||
instead of a shell. See the `Interactive Shell' and `Shell Mode'
|
||
sections of the Emacs manual for details, especially for the key
|
||
bindings active in the `*Python*' buffer.
|
||
|
||
With optional \\[universal-argument], the user is prompted for the
|
||
flags to pass to the Python interpreter. This has no effect when this
|
||
command is used to switch to an existing process, only when a new
|
||
process is started. If you use this, you will probably want to ensure
|
||
that the current arguments are retained (they will be included in the
|
||
prompt). This argument is ignored when this function is called
|
||
programmatically, or when running in Emacs 19.34 or older.
|
||
|
||
Note: You can toggle between using the CPython interpreter and the
|
||
JPython interpreter by hitting \\[py-toggle-shells]. This toggles
|
||
buffer local variables which control whether all your subshell
|
||
interactions happen to the `*JPython*' or `*Python*' buffers (the
|
||
latter is the name used for the CPython buffer).
|
||
|
||
Warning: Don't use an interactive Python if you change sys.ps1 or
|
||
sys.ps2 from their default values, or if you're running code that
|
||
prints `>>> ' or `... ' at the start of a line. `python-mode' can't
|
||
distinguish your output from Python's output, and assumes that `>>> '
|
||
at the start of a line is a prompt from Python. Similarly, the Emacs
|
||
Shell mode code assumes that both `>>> ' and `... ' at the start of a
|
||
line are Python prompts. Bad things can happen if you fool either
|
||
mode.
|
||
|
||
Warning: If you do any editing *in* the process buffer *while* the
|
||
buffer is accepting output from Python, do NOT attempt to `undo' the
|
||
changes. Some of the output (nowhere near the parts you changed!) may
|
||
be lost if you do. This appears to be an Emacs bug, an unfortunate
|
||
interaction between undo and process filters; the same problem exists in
|
||
non-Python process buffers using the default (Emacs-supplied) process
|
||
filter."
|
||
(interactive "P")
|
||
;; Set the default shell if not already set
|
||
(when (null py-which-shell)
|
||
(py-toggle-shells py-default-interpreter))
|
||
(let ((args py-which-args))
|
||
(when (and argprompt
|
||
(interactive-p)
|
||
(fboundp 'split-string))
|
||
;; TBD: Perhaps force "-i" in the final list?
|
||
(setq args (split-string
|
||
(read-string (concat py-which-bufname
|
||
" arguments: ")
|
||
(concat
|
||
(mapconcat 'identity py-which-args " ") " ")
|
||
))))
|
||
(switch-to-buffer-other-window
|
||
(apply 'make-comint py-which-bufname py-which-shell nil args))
|
||
(make-local-variable 'comint-prompt-regexp)
|
||
(setq comint-prompt-regexp "^>>> \\|^[.][.][.] \\|^(pdb) ")
|
||
(add-hook 'comint-output-filter-functions
|
||
'py-comint-output-filter-function)
|
||
;; pdbtrack
|
||
(add-hook 'comint-output-filter-functions 'py-pdbtrack-track-stack-file)
|
||
(setq py-pdbtrack-do-tracking-p t)
|
||
(set-syntax-table py-mode-syntax-table)
|
||
(use-local-map py-shell-map)
|
||
))
|
||
|
||
(defun py-clear-queue ()
|
||
"Clear the queue of temporary files waiting to execute."
|
||
(interactive)
|
||
(let ((n (length py-file-queue)))
|
||
(mapcar 'delete-file py-file-queue)
|
||
(setq py-file-queue nil)
|
||
(message "%d pending files de-queued." n)))
|
||
|
||
|
||
(defun py-execute-region (start end &optional async)
|
||
"Execute the region in a Python interpreter.
|
||
|
||
The region is first copied into a temporary file (in the directory
|
||
`py-temp-directory'). If there is no Python interpreter shell
|
||
running, this file is executed synchronously using
|
||
`shell-command-on-region'. If the program is long running, use
|
||
\\[universal-argument] to run the command asynchronously in its own
|
||
buffer.
|
||
|
||
When this function is used programmatically, arguments START and END
|
||
specify the region to execute, and optional third argument ASYNC, if
|
||
non-nil, specifies to run the command asynchronously in its own
|
||
buffer.
|
||
|
||
If the Python interpreter shell is running, the region is execfile()'d
|
||
in that shell. If you try to execute regions too quickly,
|
||
`python-mode' will queue them up and execute them one at a time when
|
||
it sees a `>>> ' prompt from Python. Each time this happens, the
|
||
process buffer is popped into a window (if it's not already in some
|
||
window) so you can see it, and a comment of the form
|
||
|
||
\t## working on region in file <name>...
|
||
|
||
is inserted at the end. See also the command `py-clear-queue'."
|
||
(interactive "r\nP")
|
||
(or (< start end)
|
||
(error "Region is empty"))
|
||
(let* ((proc (get-process py-which-bufname))
|
||
(temp (if (memq 'broken-temp-names py-emacs-features)
|
||
(let
|
||
((sn py-serial-number)
|
||
(pid (and (fboundp 'emacs-pid) (emacs-pid))))
|
||
(setq py-serial-number (1+ py-serial-number))
|
||
(if pid
|
||
(format "python-%d-%d" sn pid)
|
||
(format "python-%d" sn)))
|
||
(make-temp-name "python-")))
|
||
(file (expand-file-name temp py-temp-directory))
|
||
(cur (current-buffer))
|
||
(buf (get-buffer-create file)))
|
||
;; Write the contents of the buffer, watching out for indented regions.
|
||
(save-excursion
|
||
(goto-char start)
|
||
(let ((needs-if (/= (py-point 'bol) (py-point 'boi))))
|
||
(set-buffer buf)
|
||
(when needs-if
|
||
(insert "if 1:\n"))
|
||
(insert-buffer-substring cur start end)))
|
||
(cond
|
||
;; always run the code in its own asynchronous subprocess
|
||
(async
|
||
;; User explicitly wants this to run in its own async subprocess
|
||
(save-excursion
|
||
(set-buffer buf)
|
||
(write-region (point-min) (point-max) file nil 'nomsg))
|
||
(let* ((buf (generate-new-buffer-name py-output-buffer))
|
||
;; TBD: a horrible hack, but why create new Custom variables?
|
||
(arg (if (string-equal py-which-bufname "Python")
|
||
"-u" "")))
|
||
(start-process py-which-bufname buf py-which-shell arg file)
|
||
(pop-to-buffer buf)
|
||
(py-postprocess-output-buffer buf)
|
||
;; TBD: clean up the temporary file!
|
||
))
|
||
;; if the Python interpreter shell is running, queue it up for
|
||
;; execution there.
|
||
(proc
|
||
;; use the existing python shell
|
||
(save-excursion
|
||
(set-buffer buf)
|
||
(write-region (point-min) (point-max) file nil 'nomsg))
|
||
(if (not py-file-queue)
|
||
(py-execute-file proc file)
|
||
(message "File %s queued for execution" file))
|
||
(setq py-file-queue (append py-file-queue (list file)))
|
||
(setq py-exception-buffer (cons file (current-buffer))))
|
||
(t
|
||
;; TBD: a horrible hack, buy why create new Custom variables?
|
||
(let ((cmd (concat py-which-shell
|
||
(if (string-equal py-which-bufname "JPython")
|
||
" -" ""))))
|
||
;; otherwise either run it synchronously in a subprocess
|
||
(save-excursion
|
||
(set-buffer buf)
|
||
(shell-command-on-region (point-min) (point-max)
|
||
cmd py-output-buffer))
|
||
;; shell-command-on-region kills the output buffer if it never
|
||
;; existed and there's no output from the command
|
||
(if (not (get-buffer py-output-buffer))
|
||
(message "No output.")
|
||
(setq py-exception-buffer (current-buffer))
|
||
(let ((err-p (py-postprocess-output-buffer py-output-buffer)))
|
||
(pop-to-buffer py-output-buffer)
|
||
(if err-p
|
||
(pop-to-buffer py-exception-buffer)))
|
||
))
|
||
;; TBD: delete the buffer
|
||
)
|
||
)
|
||
;; Clean up after ourselves.
|
||
(kill-buffer buf)))
|
||
|
||
|
||
;; Code execution commands
|
||
(defun py-execute-buffer (&optional async)
|
||
"Send the contents of the buffer to a Python interpreter.
|
||
If the file local variable `py-master-file' is non-nil, execute the
|
||
named file instead of the buffer's file.
|
||
|
||
If there is a *Python* process buffer it is used. If a clipping
|
||
restriction is in effect, only the accessible portion of the buffer is
|
||
sent. A trailing newline will be supplied if needed.
|
||
|
||
See the `\\[py-execute-region]' docs for an account of some
|
||
subtleties, including the use of the optional ASYNC argument."
|
||
(interactive "P")
|
||
(if py-master-file
|
||
(let* ((filename (expand-file-name py-master-file))
|
||
(buffer (or (get-file-buffer filename)
|
||
(find-file-noselect filename))))
|
||
(set-buffer buffer)))
|
||
(py-execute-region (point-min) (point-max) async))
|
||
|
||
(defun py-execute-import-or-reload (&optional async)
|
||
"Import the current buffer's file in a Python interpreter.
|
||
|
||
If the file has already been imported, then do reload instead to get
|
||
the latest version.
|
||
|
||
If the file's name does not end in \".py\", then do execfile instead.
|
||
|
||
If the current buffer is not visiting a file, do `py-execute-buffer'
|
||
instead.
|
||
|
||
If the file local variable `py-master-file' is non-nil, import or
|
||
reload the named file instead of the buffer's file. The file may be
|
||
saved based on the value of `py-execute-import-or-reload-save-p'.
|
||
|
||
See the `\\[py-execute-region]' docs for an account of some
|
||
subtleties, including the use of the optional ASYNC argument.
|
||
|
||
This may be preferable to `\\[py-execute-buffer]' because:
|
||
|
||
- Definitions stay in their module rather than appearing at top
|
||
level, where they would clutter the global namespace and not affect
|
||
uses of qualified names (MODULE.NAME).
|
||
|
||
- The Python debugger gets line number information about the functions."
|
||
(interactive "P")
|
||
;; Check file local variable py-master-file
|
||
(if py-master-file
|
||
(let* ((filename (expand-file-name py-master-file))
|
||
(buffer (or (get-file-buffer filename)
|
||
(find-file-noselect filename))))
|
||
(set-buffer buffer)))
|
||
(let ((file (buffer-file-name (current-buffer))))
|
||
(if file
|
||
(progn
|
||
;; Maybe save some buffers
|
||
(save-some-buffers (not py-ask-about-save) nil)
|
||
(py-execute-string
|
||
(if (string-match "\\.py$" file)
|
||
(let ((f (file-name-sans-extension
|
||
(file-name-nondirectory file))))
|
||
(format "if globals().has_key('%s'):\n reload(%s)\nelse:\n import %s\n"
|
||
f f f))
|
||
(format "execfile(r'%s')\n" file))
|
||
async))
|
||
;; else
|
||
(py-execute-buffer async))))
|
||
|
||
|
||
(defun py-execute-def-or-class (&optional async)
|
||
"Send the current function or class definition to a Python interpreter.
|
||
|
||
If there is a *Python* process buffer it is used.
|
||
|
||
See the `\\[py-execute-region]' docs for an account of some
|
||
subtleties, including the use of the optional ASYNC argument."
|
||
(interactive "P")
|
||
(save-excursion
|
||
(py-mark-def-or-class)
|
||
;; mark is before point
|
||
(py-execute-region (mark) (point) async)))
|
||
|
||
|
||
(defun py-execute-string (string &optional async)
|
||
"Send the argument STRING to a Python interpreter.
|
||
|
||
If there is a *Python* process buffer it is used.
|
||
|
||
See the `\\[py-execute-region]' docs for an account of some
|
||
subtleties, including the use of the optional ASYNC argument."
|
||
(interactive "sExecute Python command: ")
|
||
(save-excursion
|
||
(set-buffer (get-buffer-create
|
||
(generate-new-buffer-name " *Python Command*")))
|
||
(insert string)
|
||
(py-execute-region (point-min) (point-max) async)))
|
||
|
||
|
||
|
||
(defun py-jump-to-exception (file line)
|
||
"Jump to the Python code in FILE at LINE."
|
||
(let ((buffer (cond ((string-equal file "<stdin>")
|
||
(if (consp py-exception-buffer)
|
||
(cdr py-exception-buffer)
|
||
py-exception-buffer))
|
||
((and (consp py-exception-buffer)
|
||
(string-equal file (car py-exception-buffer)))
|
||
(cdr py-exception-buffer))
|
||
((py-safe (find-file-noselect file)))
|
||
;; could not figure out what file the exception
|
||
;; is pointing to, so prompt for it
|
||
(t (find-file (read-file-name "Exception file: "
|
||
nil
|
||
file t))))))
|
||
(pop-to-buffer buffer)
|
||
;; Force Python mode
|
||
(if (not (eq major-mode 'python-mode))
|
||
(python-mode))
|
||
(goto-line line)
|
||
(message "Jumping to exception in file %s on line %d" file line)))
|
||
|
||
(defun py-mouseto-exception (event)
|
||
"Jump to the code which caused the Python exception at EVENT.
|
||
EVENT is usually a mouse click."
|
||
(interactive "e")
|
||
(cond
|
||
((fboundp 'event-point)
|
||
;; XEmacs
|
||
(let* ((point (event-point event))
|
||
(buffer (event-buffer event))
|
||
(e (and point buffer (extent-at point buffer 'py-exc-info)))
|
||
(info (and e (extent-property e 'py-exc-info))))
|
||
(message "Event point: %d, info: %s" point info)
|
||
(and info
|
||
(py-jump-to-exception (car info) (cdr info)))
|
||
))
|
||
;; Emacs -- Please port this!
|
||
))
|
||
|
||
(defun py-goto-exception ()
|
||
"Go to the line indicated by the traceback."
|
||
(interactive)
|
||
(let (file line)
|
||
(save-excursion
|
||
(beginning-of-line)
|
||
(if (looking-at py-traceback-line-re)
|
||
(setq file (match-string 1)
|
||
line (string-to-int (match-string 2)))))
|
||
(if (not file)
|
||
(error "Not on a traceback line"))
|
||
(py-jump-to-exception file line)))
|
||
|
||
(defun py-find-next-exception (start buffer searchdir errwhere)
|
||
"Find the next Python exception and jump to the code that caused it.
|
||
START is the buffer position in BUFFER from which to begin searching
|
||
for an exception. SEARCHDIR is a function, either
|
||
`re-search-backward' or `re-search-forward' indicating the direction
|
||
to search. ERRWHERE is used in an error message if the limit (top or
|
||
bottom) of the trackback stack is encountered."
|
||
(let (file line)
|
||
(save-excursion
|
||
(set-buffer buffer)
|
||
(goto-char (py-point start))
|
||
(if (funcall searchdir py-traceback-line-re nil t)
|
||
(setq file (match-string 1)
|
||
line (string-to-int (match-string 2)))))
|
||
(if (and file line)
|
||
(py-jump-to-exception file line)
|
||
(error "%s of traceback" errwhere))))
|
||
|
||
(defun py-down-exception (&optional bottom)
|
||
"Go to the next line down in the traceback.
|
||
With \\[univeral-argument] (programmatically, optional argument
|
||
BOTTOM), jump to the bottom (innermost) exception in the exception
|
||
stack."
|
||
(interactive "P")
|
||
(let* ((proc (get-process "Python"))
|
||
(buffer (if proc "*Python*" py-output-buffer)))
|
||
(if bottom
|
||
(py-find-next-exception 'eob buffer 're-search-backward "Bottom")
|
||
(py-find-next-exception 'eol buffer 're-search-forward "Bottom"))))
|
||
|
||
(defun py-up-exception (&optional top)
|
||
"Go to the previous line up in the traceback.
|
||
With \\[universal-argument] (programmatically, optional argument TOP)
|
||
jump to the top (outermost) exception in the exception stack."
|
||
(interactive "P")
|
||
(let* ((proc (get-process "Python"))
|
||
(buffer (if proc "*Python*" py-output-buffer)))
|
||
(if top
|
||
(py-find-next-exception 'bob buffer 're-search-forward "Top")
|
||
(py-find-next-exception 'bol buffer 're-search-backward "Top"))))
|
||
|
||
|
||
;; Electric deletion
|
||
(defun py-electric-backspace (arg)
|
||
"Delete preceding character or levels of indentation.
|
||
Deletion is performed by calling the function in `py-backspace-function'
|
||
with a single argument (the number of characters to delete).
|
||
|
||
If point is at the leftmost column, delete the preceding newline.
|
||
|
||
Otherwise, if point is at the leftmost non-whitespace character of a
|
||
line that is neither a continuation line nor a non-indenting comment
|
||
line, or if point is at the end of a blank line, this command reduces
|
||
the indentation to match that of the line that opened the current
|
||
block of code. The line that opened the block is displayed in the
|
||
echo area to help you keep track of where you are. With
|
||
\\[universal-argument] dedents that many blocks (but not past column
|
||
zero).
|
||
|
||
Otherwise the preceding character is deleted, converting a tab to
|
||
spaces if needed so that only a single column position is deleted.
|
||
\\[universal-argument] specifies how many characters to delete;
|
||
default is 1.
|
||
|
||
When used programmatically, argument ARG specifies the number of
|
||
blocks to dedent, or the number of characters to delete, as indicated
|
||
above."
|
||
(interactive "*p")
|
||
(if (or (/= (current-indentation) (current-column))
|
||
(bolp)
|
||
(py-continuation-line-p)
|
||
; (not py-honor-comment-indentation)
|
||
; (looking-at "#[^ \t\n]") ; non-indenting #
|
||
)
|
||
(funcall py-backspace-function arg)
|
||
;; else indent the same as the colon line that opened the block
|
||
;; force non-blank so py-goto-block-up doesn't ignore it
|
||
(insert-char ?* 1)
|
||
(backward-char)
|
||
(let ((base-indent 0) ; indentation of base line
|
||
(base-text "") ; and text of base line
|
||
(base-found-p nil))
|
||
(save-excursion
|
||
(while (< 0 arg)
|
||
(condition-case nil ; in case no enclosing block
|
||
(progn
|
||
(py-goto-block-up 'no-mark)
|
||
(setq base-indent (current-indentation)
|
||
base-text (py-suck-up-leading-text)
|
||
base-found-p t))
|
||
(error nil))
|
||
(setq arg (1- arg))))
|
||
(delete-char 1) ; toss the dummy character
|
||
(delete-horizontal-space)
|
||
(indent-to base-indent)
|
||
(if base-found-p
|
||
(message "Closes block: %s" base-text)))))
|
||
|
||
|
||
(defun py-electric-delete (arg)
|
||
"Delete preceding or following character or levels of whitespace.
|
||
|
||
The behavior of this function depends on the variable
|
||
`delete-key-deletes-forward'. If this variable is nil (or does not
|
||
exist, as in older Emacsen and non-XEmacs versions), then this
|
||
function behaves identically to \\[c-electric-backspace].
|
||
|
||
If `delete-key-deletes-forward' is non-nil and is supported in your
|
||
Emacs, then deletion occurs in the forward direction, by calling the
|
||
function in `py-delete-function'.
|
||
|
||
\\[universal-argument] (programmatically, argument ARG) specifies the
|
||
number of characters to delete (default is 1)."
|
||
(interactive "*p")
|
||
(if (or (and (fboundp 'delete-forward-p) ;XEmacs 21
|
||
(delete-forward-p))
|
||
(and (boundp 'delete-key-deletes-forward) ;XEmacs 20
|
||
delete-key-deletes-forward))
|
||
(funcall py-delete-function arg)
|
||
(py-electric-backspace arg)))
|
||
|
||
;; required for pending-del and delsel modes
|
||
(put 'py-electric-backspace 'delete-selection 'supersede) ;delsel
|
||
(put 'py-electric-backspace 'pending-delete 'supersede) ;pending-del
|
||
(put 'py-electric-delete 'delete-selection 'supersede) ;delsel
|
||
(put 'py-electric-delete 'pending-delete 'supersede) ;pending-del
|
||
|
||
|
||
|
||
(defun py-indent-line (&optional arg)
|
||
"Fix the indentation of the current line according to Python rules.
|
||
With \\[universal-argument] (programmatically, the optional argument
|
||
ARG non-nil), ignore dedenting rules for block closing statements
|
||
(e.g. return, raise, break, continue, pass)
|
||
|
||
This function is normally bound to `indent-line-function' so
|
||
\\[indent-for-tab-command] will call it."
|
||
(interactive "P")
|
||
(let* ((ci (current-indentation))
|
||
(move-to-indentation-p (<= (current-column) ci))
|
||
(need (py-compute-indentation (not arg))))
|
||
;; see if we need to dedent
|
||
(if (py-outdent-p)
|
||
(setq need (- need py-indent-offset)))
|
||
(if (/= ci need)
|
||
(save-excursion
|
||
(beginning-of-line)
|
||
(delete-horizontal-space)
|
||
(indent-to need)))
|
||
(if move-to-indentation-p (back-to-indentation))))
|
||
|
||
(defun py-newline-and-indent ()
|
||
"Strives to act like the Emacs `newline-and-indent'.
|
||
This is just `strives to' because correct indentation can't be computed
|
||
from scratch for Python code. In general, deletes the whitespace before
|
||
point, inserts a newline, and takes an educated guess as to how you want
|
||
the new line indented."
|
||
(interactive)
|
||
(let ((ci (current-indentation)))
|
||
(if (< ci (current-column)) ; if point beyond indentation
|
||
(newline-and-indent)
|
||
;; else try to act like newline-and-indent "normally" acts
|
||
(beginning-of-line)
|
||
(insert-char ?\n 1)
|
||
(move-to-column ci))))
|
||
|
||
(defun py-compute-indentation (honor-block-close-p)
|
||
"Compute Python indentation.
|
||
When HONOR-BLOCK-CLOSE-P is non-nil, statements such as `return',
|
||
`raise', `break', `continue', and `pass' force one level of
|
||
dedenting."
|
||
(save-excursion
|
||
(beginning-of-line)
|
||
(let* ((bod (py-point 'bod))
|
||
(pps (parse-partial-sexp bod (point)))
|
||
(boipps (parse-partial-sexp bod (py-point 'boi)))
|
||
placeholder)
|
||
(cond
|
||
;; are we inside a multi-line string or comment?
|
||
((or (and (nth 3 pps) (nth 3 boipps))
|
||
(and (nth 4 pps) (nth 4 boipps)))
|
||
(save-excursion
|
||
(if (not py-align-multiline-strings-p) 0
|
||
;; skip back over blank & non-indenting comment lines
|
||
;; note: will skip a blank or non-indenting comment line
|
||
;; that happens to be a continuation line too
|
||
(re-search-backward "^[ \t]*\\([^ \t\n#]\\|#[ \t\n]\\)" nil 'move)
|
||
(back-to-indentation)
|
||
(current-column))))
|
||
;; are we on a continuation line?
|
||
((py-continuation-line-p)
|
||
(let ((startpos (point))
|
||
(open-bracket-pos (py-nesting-level))
|
||
endpos searching found state)
|
||
(if open-bracket-pos
|
||
(progn
|
||
;; align with first item in list; else a normal
|
||
;; indent beyond the line with the open bracket
|
||
(goto-char (1+ open-bracket-pos)) ; just beyond bracket
|
||
;; is the first list item on the same line?
|
||
(skip-chars-forward " \t")
|
||
(if (null (memq (following-char) '(?\n ?# ?\\)))
|
||
; yes, so line up with it
|
||
(current-column)
|
||
;; first list item on another line, or doesn't exist yet
|
||
(forward-line 1)
|
||
(while (and (< (point) startpos)
|
||
(looking-at "[ \t]*[#\n\\\\]")) ; skip noise
|
||
(forward-line 1))
|
||
(if (and (< (point) startpos)
|
||
(/= startpos
|
||
(save-excursion
|
||
(goto-char (1+ open-bracket-pos))
|
||
(forward-comment (point-max))
|
||
(point))))
|
||
;; again mimic the first list item
|
||
(current-indentation)
|
||
;; else they're about to enter the first item
|
||
(goto-char open-bracket-pos)
|
||
(setq placeholder (point))
|
||
(py-goto-initial-line)
|
||
(py-goto-beginning-of-tqs
|
||
(save-excursion (nth 3 (parse-partial-sexp
|
||
placeholder (point)))))
|
||
(+ (current-indentation) py-indent-offset))))
|
||
|
||
;; else on backslash continuation line
|
||
(forward-line -1)
|
||
(if (py-continuation-line-p) ; on at least 3rd line in block
|
||
(current-indentation) ; so just continue the pattern
|
||
;; else started on 2nd line in block, so indent more.
|
||
;; if base line is an assignment with a start on a RHS,
|
||
;; indent to 2 beyond the leftmost "="; else skip first
|
||
;; chunk of non-whitespace characters on base line, + 1 more
|
||
;; column
|
||
(end-of-line)
|
||
(setq endpos (point)
|
||
searching t)
|
||
(back-to-indentation)
|
||
(setq startpos (point))
|
||
;; look at all "=" from left to right, stopping at first
|
||
;; one not nested in a list or string
|
||
(while searching
|
||
(skip-chars-forward "^=" endpos)
|
||
(if (= (point) endpos)
|
||
(setq searching nil)
|
||
(forward-char 1)
|
||
(setq state (parse-partial-sexp startpos (point)))
|
||
(if (and (zerop (car state)) ; not in a bracket
|
||
(null (nth 3 state))) ; & not in a string
|
||
(progn
|
||
(setq searching nil) ; done searching in any case
|
||
(setq found
|
||
(not (or
|
||
(eq (following-char) ?=)
|
||
(memq (char-after (- (point) 2))
|
||
'(?< ?> ?!)))))))))
|
||
(if (or (not found) ; not an assignment
|
||
(looking-at "[ \t]*\\\\")) ; <=><spaces><backslash>
|
||
(progn
|
||
(goto-char startpos)
|
||
(skip-chars-forward "^ \t\n")))
|
||
;; if this is a continuation for a block opening
|
||
;; statement, add some extra offset.
|
||
(+ (current-column) (if (py-statement-opens-block-p)
|
||
py-continuation-offset 0)
|
||
1)
|
||
))))
|
||
|
||
;; not on a continuation line
|
||
((bobp) (current-indentation))
|
||
|
||
;; Dfn: "Indenting comment line". A line containing only a
|
||
;; comment, but which is treated like a statement for
|
||
;; indentation calculation purposes. Such lines are only
|
||
;; treated specially by the mode; they are not treated
|
||
;; specially by the Python interpreter.
|
||
|
||
;; The rules for indenting comment lines are a line where:
|
||
;; - the first non-whitespace character is `#', and
|
||
;; - the character following the `#' is whitespace, and
|
||
;; - the line is dedented with respect to (i.e. to the left
|
||
;; of) the indentation of the preceding non-blank line.
|
||
|
||
;; The first non-blank line following an indenting comment
|
||
;; line is given the same amount of indentation as the
|
||
;; indenting comment line.
|
||
|
||
;; All other comment-only lines are ignored for indentation
|
||
;; purposes.
|
||
|
||
;; Are we looking at a comment-only line which is *not* an
|
||
;; indenting comment line? If so, we assume that it's been
|
||
;; placed at the desired indentation, so leave it alone.
|
||
;; Indenting comment lines are aligned as statements down
|
||
;; below.
|
||
((and (looking-at "[ \t]*#[^ \t\n]")
|
||
;; NOTE: this test will not be performed in older Emacsen
|
||
(fboundp 'forward-comment)
|
||
(<= (current-indentation)
|
||
(save-excursion
|
||
(forward-comment (- (point-max)))
|
||
(current-indentation))))
|
||
(current-indentation))
|
||
|
||
;; else indentation based on that of the statement that
|
||
;; precedes us; use the first line of that statement to
|
||
;; establish the base, in case the user forced a non-std
|
||
;; indentation for the continuation lines (if any)
|
||
(t
|
||
;; skip back over blank & non-indenting comment lines note:
|
||
;; will skip a blank or non-indenting comment line that
|
||
;; happens to be a continuation line too. use fast Emacs 19
|
||
;; function if it's there.
|
||
(if (and (eq py-honor-comment-indentation nil)
|
||
(fboundp 'forward-comment))
|
||
(forward-comment (- (point-max)))
|
||
(let ((prefix-re (concat py-block-comment-prefix "[ \t]*"))
|
||
done)
|
||
(while (not done)
|
||
(re-search-backward "^[ \t]*\\([^ \t\n#]\\|#\\)" nil 'move)
|
||
(setq done (or (bobp)
|
||
(and (eq py-honor-comment-indentation t)
|
||
(save-excursion
|
||
(back-to-indentation)
|
||
(not (looking-at prefix-re))
|
||
))
|
||
(and (not (eq py-honor-comment-indentation t))
|
||
(save-excursion
|
||
(back-to-indentation)
|
||
(not (zerop (current-column)))))
|
||
))
|
||
)))
|
||
;; if we landed inside a string, go to the beginning of that
|
||
;; string. this handles triple quoted, multi-line spanning
|
||
;; strings.
|
||
(py-goto-beginning-of-tqs (nth 3 (parse-partial-sexp bod (point))))
|
||
;; now skip backward over continued lines
|
||
(setq placeholder (point))
|
||
(py-goto-initial-line)
|
||
;; we may *now* have landed in a TQS, so find the beginning of
|
||
;; this string.
|
||
(py-goto-beginning-of-tqs
|
||
(save-excursion (nth 3 (parse-partial-sexp
|
||
placeholder (point)))))
|
||
(+ (current-indentation)
|
||
(if (py-statement-opens-block-p)
|
||
py-indent-offset
|
||
(if (and honor-block-close-p (py-statement-closes-block-p))
|
||
(- py-indent-offset)
|
||
0)))
|
||
)))))
|
||
|
||
(defun py-guess-indent-offset (&optional global)
|
||
"Guess a good value for, and change, `py-indent-offset'.
|
||
|
||
By default, make a buffer-local copy of `py-indent-offset' with the
|
||
new value, so that other Python buffers are not affected. With
|
||
\\[universal-argument] (programmatically, optional argument GLOBAL),
|
||
change the global value of `py-indent-offset'. This affects all
|
||
Python buffers (that don't have their own buffer-local copy), both
|
||
those currently existing and those created later in the Emacs session.
|
||
|
||
Some people use a different value for `py-indent-offset' than you use.
|
||
There's no excuse for such foolishness, but sometimes you have to deal
|
||
with their ugly code anyway. This function examines the file and sets
|
||
`py-indent-offset' to what it thinks it was when they created the
|
||
mess.
|
||
|
||
Specifically, it searches forward from the statement containing point,
|
||
looking for a line that opens a block of code. `py-indent-offset' is
|
||
set to the difference in indentation between that line and the Python
|
||
statement following it. If the search doesn't succeed going forward,
|
||
it's tried again going backward."
|
||
(interactive "P") ; raw prefix arg
|
||
(let (new-value
|
||
(start (point))
|
||
(restart (point))
|
||
(found nil)
|
||
colon-indent)
|
||
(py-goto-initial-line)
|
||
(while (not (or found (eobp)))
|
||
(when (and (re-search-forward ":[ \t]*\\($\\|[#\\]\\)" nil 'move)
|
||
(not (py-in-literal restart)))
|
||
(setq restart (point))
|
||
(py-goto-initial-line)
|
||
(if (py-statement-opens-block-p)
|
||
(setq found t)
|
||
(goto-char restart))))
|
||
(unless found
|
||
(goto-char start)
|
||
(py-goto-initial-line)
|
||
(while (not (or found (bobp)))
|
||
(setq found (and
|
||
(re-search-backward ":[ \t]*\\($\\|[#\\]\\)" nil 'move)
|
||
(or (py-goto-initial-line) t) ; always true -- side effect
|
||
(py-statement-opens-block-p)))))
|
||
(setq colon-indent (current-indentation)
|
||
found (and found (zerop (py-next-statement 1)))
|
||
new-value (- (current-indentation) colon-indent))
|
||
(goto-char start)
|
||
(if (not found)
|
||
(error "Sorry, couldn't guess a value for py-indent-offset")
|
||
(funcall (if global 'kill-local-variable 'make-local-variable)
|
||
'py-indent-offset)
|
||
(setq py-indent-offset new-value)
|
||
(or noninteractive
|
||
(message "%s value of py-indent-offset set to %d"
|
||
(if global "Global" "Local")
|
||
py-indent-offset)))
|
||
))
|
||
|
||
(defun py-comment-indent-function ()
|
||
"Python version of `comment-indent-function'."
|
||
;; This is required when filladapt is turned off. Without it, when
|
||
;; filladapt is not used, comments which start in column zero
|
||
;; cascade one character to the right
|
||
(save-excursion
|
||
(beginning-of-line)
|
||
(let ((eol (py-point 'eol)))
|
||
(and comment-start-skip
|
||
(re-search-forward comment-start-skip eol t)
|
||
(setq eol (match-beginning 0)))
|
||
(goto-char eol)
|
||
(skip-chars-backward " \t")
|
||
(max comment-column (+ (current-column) (if (bolp) 0 1)))
|
||
)))
|
||
|
||
(defun py-narrow-to-defun (&optional class)
|
||
"Make text outside current defun invisible.
|
||
The defun visible is the one that contains point or follows point.
|
||
Optional CLASS is passed directly to `py-beginning-of-def-or-class'."
|
||
(interactive "P")
|
||
(save-excursion
|
||
(widen)
|
||
(py-end-of-def-or-class class)
|
||
(let ((end (point)))
|
||
(py-beginning-of-def-or-class class)
|
||
(narrow-to-region (point) end))))
|
||
|
||
|
||
(defun py-shift-region (start end count)
|
||
"Indent lines from START to END by COUNT spaces."
|
||
(save-excursion
|
||
(goto-char end)
|
||
(beginning-of-line)
|
||
(setq end (point))
|
||
(goto-char start)
|
||
(beginning-of-line)
|
||
(setq start (point))
|
||
(indent-rigidly start end count)))
|
||
|
||
(defun py-shift-region-left (start end &optional count)
|
||
"Shift region of Python code to the left.
|
||
The lines from the line containing the start of the current region up
|
||
to (but not including) the line containing the end of the region are
|
||
shifted to the left, by `py-indent-offset' columns.
|
||
|
||
If a prefix argument is given, the region is instead shifted by that
|
||
many columns. With no active region, dedent only the current line.
|
||
You cannot dedent the region if any line is already at column zero."
|
||
(interactive
|
||
(let ((p (point))
|
||
(m (mark))
|
||
(arg current-prefix-arg))
|
||
(if m
|
||
(list (min p m) (max p m) arg)
|
||
(list p (save-excursion (forward-line 1) (point)) arg))))
|
||
;; if any line is at column zero, don't shift the region
|
||
(save-excursion
|
||
(goto-char start)
|
||
(while (< (point) end)
|
||
(back-to-indentation)
|
||
(if (and (zerop (current-column))
|
||
(not (looking-at "\\s *$")))
|
||
(error "Region is at left edge"))
|
||
(forward-line 1)))
|
||
(py-shift-region start end (- (prefix-numeric-value
|
||
(or count py-indent-offset))))
|
||
(py-keep-region-active))
|
||
|
||
(defun py-shift-region-right (start end &optional count)
|
||
"Shift region of Python code to the right.
|
||
The lines from the line containing the start of the current region up
|
||
to (but not including) the line containing the end of the region are
|
||
shifted to the right, by `py-indent-offset' columns.
|
||
|
||
If a prefix argument is given, the region is instead shifted by that
|
||
many columns. With no active region, indent only the current line."
|
||
(interactive
|
||
(let ((p (point))
|
||
(m (mark))
|
||
(arg current-prefix-arg))
|
||
(if m
|
||
(list (min p m) (max p m) arg)
|
||
(list p (save-excursion (forward-line 1) (point)) arg))))
|
||
(py-shift-region start end (prefix-numeric-value
|
||
(or count py-indent-offset)))
|
||
(py-keep-region-active))
|
||
|
||
(defun py-indent-region (start end &optional indent-offset)
|
||
"Reindent a region of Python code.
|
||
|
||
The lines from the line containing the start of the current region up
|
||
to (but not including) the line containing the end of the region are
|
||
reindented. If the first line of the region has a non-whitespace
|
||
character in the first column, the first line is left alone and the
|
||
rest of the region is reindented with respect to it. Else the entire
|
||
region is reindented with respect to the (closest code or indenting
|
||
comment) statement immediately preceding the region.
|
||
|
||
This is useful when code blocks are moved or yanked, when enclosing
|
||
control structures are introduced or removed, or to reformat code
|
||
using a new value for the indentation offset.
|
||
|
||
If a numeric prefix argument is given, it will be used as the value of
|
||
the indentation offset. Else the value of `py-indent-offset' will be
|
||
used.
|
||
|
||
Warning: The region must be consistently indented before this function
|
||
is called! This function does not compute proper indentation from
|
||
scratch (that's impossible in Python), it merely adjusts the existing
|
||
indentation to be correct in context.
|
||
|
||
Warning: This function really has no idea what to do with
|
||
non-indenting comment lines, and shifts them as if they were indenting
|
||
comment lines. Fixing this appears to require telepathy.
|
||
|
||
Special cases: whitespace is deleted from blank lines; continuation
|
||
lines are shifted by the same amount their initial line was shifted,
|
||
in order to preserve their relative indentation with respect to their
|
||
initial line; and comment lines beginning in column 1 are ignored."
|
||
(interactive "*r\nP") ; region; raw prefix arg
|
||
(save-excursion
|
||
(goto-char end) (beginning-of-line) (setq end (point-marker))
|
||
(goto-char start) (beginning-of-line)
|
||
(let ((py-indent-offset (prefix-numeric-value
|
||
(or indent-offset py-indent-offset)))
|
||
(indents '(-1)) ; stack of active indent levels
|
||
(target-column 0) ; column to which to indent
|
||
(base-shifted-by 0) ; amount last base line was shifted
|
||
(indent-base (if (looking-at "[ \t\n]")
|
||
(py-compute-indentation t)
|
||
0))
|
||
ci)
|
||
(while (< (point) end)
|
||
(setq ci (current-indentation))
|
||
;; figure out appropriate target column
|
||
(cond
|
||
((or (eq (following-char) ?#) ; comment in column 1
|
||
(looking-at "[ \t]*$")) ; entirely blank
|
||
(setq target-column 0))
|
||
((py-continuation-line-p) ; shift relative to base line
|
||
(setq target-column (+ ci base-shifted-by)))
|
||
(t ; new base line
|
||
(if (> ci (car indents)) ; going deeper; push it
|
||
(setq indents (cons ci indents))
|
||
;; else we should have seen this indent before
|
||
(setq indents (memq ci indents)) ; pop deeper indents
|
||
(if (null indents)
|
||
(error "Bad indentation in region, at line %d"
|
||
(save-restriction
|
||
(widen)
|
||
(1+ (count-lines 1 (point)))))))
|
||
(setq target-column (+ indent-base
|
||
(* py-indent-offset
|
||
(- (length indents) 2))))
|
||
(setq base-shifted-by (- target-column ci))))
|
||
;; shift as needed
|
||
(if (/= ci target-column)
|
||
(progn
|
||
(delete-horizontal-space)
|
||
(indent-to target-column)))
|
||
(forward-line 1))))
|
||
(set-marker end nil))
|
||
|
||
(defun py-comment-region (beg end &optional arg)
|
||
"Like `comment-region' but uses double hash (`#') comment starter."
|
||
(interactive "r\nP")
|
||
(let ((comment-start py-block-comment-prefix))
|
||
(comment-region beg end arg)))
|
||
|
||
|
||
;; Functions for moving point
|
||
(defun py-previous-statement (count)
|
||
"Go to the start of the COUNTth preceding Python statement.
|
||
By default, goes to the previous statement. If there is no such
|
||
statement, goes to the first statement. Return count of statements
|
||
left to move. `Statements' do not include blank, comment, or
|
||
continuation lines."
|
||
(interactive "p") ; numeric prefix arg
|
||
(if (< count 0) (py-next-statement (- count))
|
||
(py-goto-initial-line)
|
||
(let (start)
|
||
(while (and
|
||
(setq start (point)) ; always true -- side effect
|
||
(> count 0)
|
||
(zerop (forward-line -1))
|
||
(py-goto-statement-at-or-above))
|
||
(setq count (1- count)))
|
||
(if (> count 0) (goto-char start)))
|
||
count))
|
||
|
||
(defun py-next-statement (count)
|
||
"Go to the start of next Python statement.
|
||
If the statement at point is the i'th Python statement, goes to the
|
||
start of statement i+COUNT. If there is no such statement, goes to the
|
||
last statement. Returns count of statements left to move. `Statements'
|
||
do not include blank, comment, or continuation lines."
|
||
(interactive "p") ; numeric prefix arg
|
||
(if (< count 0) (py-previous-statement (- count))
|
||
(beginning-of-line)
|
||
(let (start)
|
||
(while (and
|
||
(setq start (point)) ; always true -- side effect
|
||
(> count 0)
|
||
(py-goto-statement-below))
|
||
(setq count (1- count)))
|
||
(if (> count 0) (goto-char start)))
|
||
count))
|
||
|
||
(defun py-goto-block-up (&optional nomark)
|
||
"Move up to start of current block.
|
||
Go to the statement that starts the smallest enclosing block; roughly
|
||
speaking, this will be the closest preceding statement that ends with a
|
||
colon and is indented less than the statement you started on. If
|
||
successful, also sets the mark to the starting point.
|
||
|
||
`\\[py-mark-block]' can be used afterward to mark the whole code
|
||
block, if desired.
|
||
|
||
If called from a program, the mark will not be set if optional argument
|
||
NOMARK is not nil."
|
||
(interactive)
|
||
(let ((start (point))
|
||
(found nil)
|
||
initial-indent)
|
||
(py-goto-initial-line)
|
||
;; if on blank or non-indenting comment line, use the preceding stmt
|
||
(if (looking-at "[ \t]*\\($\\|#[^ \t\n]\\)")
|
||
(progn
|
||
(py-goto-statement-at-or-above)
|
||
(setq found (py-statement-opens-block-p))))
|
||
;; search back for colon line indented less
|
||
(setq initial-indent (current-indentation))
|
||
(if (zerop initial-indent)
|
||
;; force fast exit
|
||
(goto-char (point-min)))
|
||
(while (not (or found (bobp)))
|
||
(setq found
|
||
(and
|
||
(re-search-backward ":[ \t]*\\($\\|[#\\]\\)" nil 'move)
|
||
(or (py-goto-initial-line) t) ; always true -- side effect
|
||
(< (current-indentation) initial-indent)
|
||
(py-statement-opens-block-p))))
|
||
(if found
|
||
(progn
|
||
(or nomark (push-mark start))
|
||
(back-to-indentation))
|
||
(goto-char start)
|
||
(error "Enclosing block not found"))))
|
||
|
||
(defun py-beginning-of-def-or-class (&optional class count)
|
||
"Move point to start of `def' or `class'.
|
||
|
||
Searches back for the closest preceding `def'. If you supply a prefix
|
||
arg, looks for a `class' instead. The docs below assume the `def'
|
||
case; just substitute `class' for `def' for the other case.
|
||
Programmatically, if CLASS is `either', then moves to either `class'
|
||
or `def'.
|
||
|
||
When second optional argument is given programmatically, move to the
|
||
COUNTth start of `def'.
|
||
|
||
If point is in a `def' statement already, and after the `d', simply
|
||
moves point to the start of the statement.
|
||
|
||
Otherwise (i.e. when point is not in a `def' statement, or at or
|
||
before the `d' of a `def' statement), searches for the closest
|
||
preceding `def' statement, and leaves point at its start. If no such
|
||
statement can be found, leaves point at the start of the buffer.
|
||
|
||
Returns t iff a `def' statement is found by these rules.
|
||
|
||
Note that doing this command repeatedly will take you closer to the
|
||
start of the buffer each time.
|
||
|
||
To mark the current `def', see `\\[py-mark-def-or-class]'."
|
||
(interactive "P") ; raw prefix arg
|
||
(setq count (or count 1))
|
||
(let ((at-or-before-p (<= (current-column) (current-indentation)))
|
||
(start-of-line (goto-char (py-point 'bol)))
|
||
(start-of-stmt (goto-char (py-point 'bos)))
|
||
(start-re (cond ((eq class 'either) "^[ \t]*\\(class\\|def\\)\\>")
|
||
(class "^[ \t]*class\\>")
|
||
(t "^[ \t]*def\\>")))
|
||
)
|
||
;; searching backward
|
||
(if (and (< 0 count)
|
||
(or (/= start-of-stmt start-of-line)
|
||
(not at-or-before-p)))
|
||
(end-of-line))
|
||
;; search forward
|
||
(if (and (> 0 count)
|
||
(zerop (current-column))
|
||
(looking-at start-re))
|
||
(end-of-line))
|
||
(if (re-search-backward start-re nil 'move count)
|
||
(goto-char (match-beginning 0)))))
|
||
|
||
;; Backwards compatibility
|
||
(defalias 'beginning-of-python-def-or-class 'py-beginning-of-def-or-class)
|
||
|
||
(defun py-end-of-def-or-class (&optional class count)
|
||
"Move point beyond end of `def' or `class' body.
|
||
|
||
By default, looks for an appropriate `def'. If you supply a prefix
|
||
arg, looks for a `class' instead. The docs below assume the `def'
|
||
case; just substitute `class' for `def' for the other case.
|
||
Programmatically, if CLASS is `either', then moves to either `class'
|
||
or `def'.
|
||
|
||
When second optional argument is given programmatically, move to the
|
||
COUNTth end of `def'.
|
||
|
||
If point is in a `def' statement already, this is the `def' we use.
|
||
|
||
Else, if the `def' found by `\\[py-beginning-of-def-or-class]'
|
||
contains the statement you started on, that's the `def' we use.
|
||
|
||
Otherwise, we search forward for the closest following `def', and use that.
|
||
|
||
If a `def' can be found by these rules, point is moved to the start of
|
||
the line immediately following the `def' block, and the position of the
|
||
start of the `def' is returned.
|
||
|
||
Else point is moved to the end of the buffer, and nil is returned.
|
||
|
||
Note that doing this command repeatedly will take you closer to the
|
||
end of the buffer each time.
|
||
|
||
To mark the current `def', see `\\[py-mark-def-or-class]'."
|
||
(interactive "P") ; raw prefix arg
|
||
(if (and count (/= count 1))
|
||
(py-beginning-of-def-or-class (- 1 count)))
|
||
(let ((start (progn (py-goto-initial-line) (point)))
|
||
(which (cond ((eq class 'either) "\\(class\\|def\\)")
|
||
(class "class")
|
||
(t "def")))
|
||
(state 'not-found))
|
||
;; move point to start of appropriate def/class
|
||
(if (looking-at (concat "[ \t]*" which "\\>")) ; already on one
|
||
(setq state 'at-beginning)
|
||
;; else see if py-beginning-of-def-or-class hits container
|
||
(if (and (py-beginning-of-def-or-class class)
|
||
(progn (py-goto-beyond-block)
|
||
(> (point) start)))
|
||
(setq state 'at-end)
|
||
;; else search forward
|
||
(goto-char start)
|
||
(if (re-search-forward (concat "^[ \t]*" which "\\>") nil 'move)
|
||
(progn (setq state 'at-beginning)
|
||
(beginning-of-line)))))
|
||
(cond
|
||
((eq state 'at-beginning) (py-goto-beyond-block) t)
|
||
((eq state 'at-end) t)
|
||
((eq state 'not-found) nil)
|
||
(t (error "Internal error in `py-end-of-def-or-class'")))))
|
||
|
||
;; Backwards compabitility
|
||
(defalias 'end-of-python-def-or-class 'py-end-of-def-or-class)
|
||
|
||
|
||
;; Functions for marking regions
|
||
(defun py-mark-block (&optional extend just-move)
|
||
"Mark following block of lines. With prefix arg, mark structure.
|
||
Easier to use than explain. It sets the region to an `interesting'
|
||
block of succeeding lines. If point is on a blank line, it goes down to
|
||
the next non-blank line. That will be the start of the region. The end
|
||
of the region depends on the kind of line at the start:
|
||
|
||
- If a comment, the region will include all succeeding comment lines up
|
||
to (but not including) the next non-comment line (if any).
|
||
|
||
- Else if a prefix arg is given, and the line begins one of these
|
||
structures:
|
||
|
||
if elif else try except finally for while def class
|
||
|
||
the region will be set to the body of the structure, including
|
||
following blocks that `belong' to it, but excluding trailing blank
|
||
and comment lines. E.g., if on a `try' statement, the `try' block
|
||
and all (if any) of the following `except' and `finally' blocks
|
||
that belong to the `try' structure will be in the region. Ditto
|
||
for if/elif/else, for/else and while/else structures, and (a bit
|
||
degenerate, since they're always one-block structures) def and
|
||
class blocks.
|
||
|
||
- Else if no prefix argument is given, and the line begins a Python
|
||
block (see list above), and the block is not a `one-liner' (i.e.,
|
||
the statement ends with a colon, not with code), the region will
|
||
include all succeeding lines up to (but not including) the next
|
||
code statement (if any) that's indented no more than the starting
|
||
line, except that trailing blank and comment lines are excluded.
|
||
E.g., if the starting line begins a multi-statement `def'
|
||
structure, the region will be set to the full function definition,
|
||
but without any trailing `noise' lines.
|
||
|
||
- Else the region will include all succeeding lines up to (but not
|
||
including) the next blank line, or code or indenting-comment line
|
||
indented strictly less than the starting line. Trailing indenting
|
||
comment lines are included in this case, but not trailing blank
|
||
lines.
|
||
|
||
A msg identifying the location of the mark is displayed in the echo
|
||
area; or do `\\[exchange-point-and-mark]' to flip down to the end.
|
||
|
||
If called from a program, optional argument EXTEND plays the role of
|
||
the prefix arg, and if optional argument JUST-MOVE is not nil, just
|
||
moves to the end of the block (& does not set mark or display a msg)."
|
||
(interactive "P") ; raw prefix arg
|
||
(py-goto-initial-line)
|
||
;; skip over blank lines
|
||
(while (and
|
||
(looking-at "[ \t]*$") ; while blank line
|
||
(not (eobp))) ; & somewhere to go
|
||
(forward-line 1))
|
||
(if (eobp)
|
||
(error "Hit end of buffer without finding a non-blank stmt"))
|
||
(let ((initial-pos (point))
|
||
(initial-indent (current-indentation))
|
||
last-pos ; position of last stmt in region
|
||
(followers
|
||
'((if elif else) (elif elif else) (else)
|
||
(try except finally) (except except) (finally)
|
||
(for else) (while else)
|
||
(def) (class) ) )
|
||
first-symbol next-symbol)
|
||
|
||
(cond
|
||
;; if comment line, suck up the following comment lines
|
||
((looking-at "[ \t]*#")
|
||
(re-search-forward "^[ \t]*[^ \t#]" nil 'move) ; look for non-comment
|
||
(re-search-backward "^[ \t]*#") ; and back to last comment in block
|
||
(setq last-pos (point)))
|
||
|
||
;; else if line is a block line and EXTEND given, suck up
|
||
;; the whole structure
|
||
((and extend
|
||
(setq first-symbol (py-suck-up-first-keyword) )
|
||
(assq first-symbol followers))
|
||
(while (and
|
||
(or (py-goto-beyond-block) t) ; side effect
|
||
(forward-line -1) ; side effect
|
||
(setq last-pos (point)) ; side effect
|
||
(py-goto-statement-below)
|
||
(= (current-indentation) initial-indent)
|
||
(setq next-symbol (py-suck-up-first-keyword))
|
||
(memq next-symbol (cdr (assq first-symbol followers))))
|
||
(setq first-symbol next-symbol)))
|
||
|
||
;; else if line *opens* a block, search for next stmt indented <=
|
||
((py-statement-opens-block-p)
|
||
(while (and
|
||
(setq last-pos (point)) ; always true -- side effect
|
||
(py-goto-statement-below)
|
||
(> (current-indentation) initial-indent))
|
||
nil))
|
||
|
||
;; else plain code line; stop at next blank line, or stmt or
|
||
;; indenting comment line indented <
|
||
(t
|
||
(while (and
|
||
(setq last-pos (point)) ; always true -- side effect
|
||
(or (py-goto-beyond-final-line) t)
|
||
(not (looking-at "[ \t]*$")) ; stop at blank line
|
||
(or
|
||
(>= (current-indentation) initial-indent)
|
||
(looking-at "[ \t]*#[^ \t\n]"))) ; ignore non-indenting #
|
||
nil)))
|
||
|
||
;; skip to end of last stmt
|
||
(goto-char last-pos)
|
||
(py-goto-beyond-final-line)
|
||
|
||
;; set mark & display
|
||
(if just-move
|
||
() ; just return
|
||
(push-mark (point) 'no-msg)
|
||
(forward-line -1)
|
||
(message "Mark set after: %s" (py-suck-up-leading-text))
|
||
(goto-char initial-pos))))
|
||
|
||
(defun py-mark-def-or-class (&optional class)
|
||
"Set region to body of def (or class, with prefix arg) enclosing point.
|
||
Pushes the current mark, then point, on the mark ring (all language
|
||
modes do this, but although it's handy it's never documented ...).
|
||
|
||
In most Emacs language modes, this function bears at least a
|
||
hallucinogenic resemblance to `\\[py-end-of-def-or-class]' and
|
||
`\\[py-beginning-of-def-or-class]'.
|
||
|
||
And in earlier versions of Python mode, all 3 were tightly connected.
|
||
Turned out that was more confusing than useful: the `goto start' and
|
||
`goto end' commands are usually used to search through a file, and
|
||
people expect them to act a lot like `search backward' and `search
|
||
forward' string-search commands. But because Python `def' and `class'
|
||
can nest to arbitrary levels, finding the smallest def containing
|
||
point cannot be done via a simple backward search: the def containing
|
||
point may not be the closest preceding def, or even the closest
|
||
preceding def that's indented less. The fancy algorithm required is
|
||
appropriate for the usual uses of this `mark' command, but not for the
|
||
`goto' variations.
|
||
|
||
So the def marked by this command may not be the one either of the
|
||
`goto' commands find: If point is on a blank or non-indenting comment
|
||
line, moves back to start of the closest preceding code statement or
|
||
indenting comment line. If this is a `def' statement, that's the def
|
||
we use. Else searches for the smallest enclosing `def' block and uses
|
||
that. Else signals an error.
|
||
|
||
When an enclosing def is found: The mark is left immediately beyond
|
||
the last line of the def block. Point is left at the start of the
|
||
def, except that: if the def is preceded by a number of comment lines
|
||
followed by (at most) one optional blank line, point is left at the
|
||
start of the comments; else if the def is preceded by a blank line,
|
||
point is left at its start.
|
||
|
||
The intent is to mark the containing def/class and its associated
|
||
documentation, to make moving and duplicating functions and classes
|
||
pleasant."
|
||
(interactive "P") ; raw prefix arg
|
||
(let ((start (point))
|
||
(which (cond ((eq class 'either) "\\(class\\|def\\)")
|
||
(class "class")
|
||
(t "def"))))
|
||
(push-mark start)
|
||
(if (not (py-go-up-tree-to-keyword which))
|
||
(progn (goto-char start)
|
||
(error "Enclosing %s not found"
|
||
(if (eq class 'either)
|
||
"def or class"
|
||
which)))
|
||
;; else enclosing def/class found
|
||
(setq start (point))
|
||
(py-goto-beyond-block)
|
||
(push-mark (point))
|
||
(goto-char start)
|
||
(if (zerop (forward-line -1)) ; if there is a preceding line
|
||
(progn
|
||
(if (looking-at "[ \t]*$") ; it's blank
|
||
(setq start (point)) ; so reset start point
|
||
(goto-char start)) ; else try again
|
||
(if (zerop (forward-line -1))
|
||
(if (looking-at "[ \t]*#") ; a comment
|
||
;; look back for non-comment line
|
||
;; tricky: note that the regexp matches a blank
|
||
;; line, cuz \n is in the 2nd character class
|
||
(and
|
||
(re-search-backward "^[ \t]*[^ \t#]" nil 'move)
|
||
(forward-line 1))
|
||
;; no comment, so go back
|
||
(goto-char start)))))))
|
||
(exchange-point-and-mark)
|
||
(py-keep-region-active))
|
||
|
||
;; ripped from cc-mode
|
||
(defun py-forward-into-nomenclature (&optional arg)
|
||
"Move forward to end of a nomenclature section or word.
|
||
With \\[universal-argument] (programmatically, optional argument ARG),
|
||
do it that many times.
|
||
|
||
A `nomenclature' is a fancy way of saying AWordWithMixedCaseNotUnderscores."
|
||
(interactive "p")
|
||
(let ((case-fold-search nil))
|
||
(if (> arg 0)
|
||
(re-search-forward
|
||
"\\(\\W\\|[_]\\)*\\([A-Z]*[a-z0-9]*\\)"
|
||
(point-max) t arg)
|
||
(while (and (< arg 0)
|
||
(re-search-backward
|
||
"\\(\\W\\|[a-z0-9]\\)[A-Z]+\\|\\(\\W\\|[_]\\)\\w+"
|
||
(point-min) 0))
|
||
(forward-char 1)
|
||
(setq arg (1+ arg)))))
|
||
(py-keep-region-active))
|
||
|
||
(defun py-backward-into-nomenclature (&optional arg)
|
||
"Move backward to beginning of a nomenclature section or word.
|
||
With optional ARG, move that many times. If ARG is negative, move
|
||
forward.
|
||
|
||
A `nomenclature' is a fancy way of saying AWordWithMixedCaseNotUnderscores."
|
||
(interactive "p")
|
||
(py-forward-into-nomenclature (- arg))
|
||
(py-keep-region-active))
|
||
|
||
|
||
|
||
;; pdbtrack functions
|
||
(defun py-pdbtrack-toggle-stack-tracking (arg)
|
||
(interactive "P")
|
||
(if (not (get-buffer-process (current-buffer)))
|
||
(error "No process associated with buffer '%s'" (current-buffer)))
|
||
;; missing or 0 is toggle, >0 turn on, <0 turn off
|
||
(if (or (not arg)
|
||
(zerop (setq arg (prefix-numeric-value arg))))
|
||
(setq py-pdbtrack-do-tracking-p (not py-pdbtrack-do-tracking-p))
|
||
(setq py-pdbtrack-do-tracking-p (> arg 0)))
|
||
(message "%sabled Python's pdbtrack"
|
||
(if py-pdbtrack-do-tracking-p "En" "Dis")))
|
||
|
||
(defun turn-on-pdbtrack ()
|
||
(interactive)
|
||
(py-pdbtrack-toggle-stack-tracking 1))
|
||
|
||
(defun turn-off-pdbtrack ()
|
||
(interactive)
|
||
(py-pdbtrack-toggle-stack-tracking 0))
|
||
|
||
|
||
|
||
;; Documentation functions
|
||
|
||
;; dump the long form of the mode blurb; does the usual doc escapes,
|
||
;; plus lines of the form ^[vc]:name$ to suck variable & command docs
|
||
;; out of the right places, along with the keys they're on & current
|
||
;; values
|
||
(defun py-dump-help-string (str)
|
||
(with-output-to-temp-buffer "*Help*"
|
||
(let ((locals (buffer-local-variables))
|
||
funckind funcname func funcdoc
|
||
(start 0) mstart end
|
||
keys )
|
||
(while (string-match "^%\\([vc]\\):\\(.+\\)\n" str start)
|
||
(setq mstart (match-beginning 0) end (match-end 0)
|
||
funckind (substring str (match-beginning 1) (match-end 1))
|
||
funcname (substring str (match-beginning 2) (match-end 2))
|
||
func (intern funcname))
|
||
(princ (substitute-command-keys (substring str start mstart)))
|
||
(cond
|
||
((equal funckind "c") ; command
|
||
(setq funcdoc (documentation func)
|
||
keys (concat
|
||
"Key(s): "
|
||
(mapconcat 'key-description
|
||
(where-is-internal func py-mode-map)
|
||
", "))))
|
||
((equal funckind "v") ; variable
|
||
(setq funcdoc (documentation-property func 'variable-documentation)
|
||
keys (if (assq func locals)
|
||
(concat
|
||
"Local/Global values: "
|
||
(prin1-to-string (symbol-value func))
|
||
" / "
|
||
(prin1-to-string (default-value func)))
|
||
(concat
|
||
"Value: "
|
||
(prin1-to-string (symbol-value func))))))
|
||
(t ; unexpected
|
||
(error "Error in py-dump-help-string, tag `%s'" funckind)))
|
||
(princ (format "\n-> %s:\t%s\t%s\n\n"
|
||
(if (equal funckind "c") "Command" "Variable")
|
||
funcname keys))
|
||
(princ funcdoc)
|
||
(terpri)
|
||
(setq start end))
|
||
(princ (substitute-command-keys (substring str start))))
|
||
(print-help-return-message)))
|
||
|
||
(defun py-describe-mode ()
|
||
"Dump long form of Python-mode docs."
|
||
(interactive)
|
||
(py-dump-help-string "Major mode for editing Python files.
|
||
Knows about Python indentation, tokens, comments and continuation lines.
|
||
Paragraphs are separated by blank lines only.
|
||
|
||
Major sections below begin with the string `@'; specific function and
|
||
variable docs begin with `->'.
|
||
|
||
@EXECUTING PYTHON CODE
|
||
|
||
\\[py-execute-import-or-reload]\timports or reloads the file in the Python interpreter
|
||
\\[py-execute-buffer]\tsends the entire buffer to the Python interpreter
|
||
\\[py-execute-region]\tsends the current region
|
||
\\[py-execute-def-or-class]\tsends the current function or class definition
|
||
\\[py-execute-string]\tsends an arbitrary string
|
||
\\[py-shell]\tstarts a Python interpreter window; this will be used by
|
||
\tsubsequent Python execution commands
|
||
%c:py-execute-import-or-reload
|
||
%c:py-execute-buffer
|
||
%c:py-execute-region
|
||
%c:py-execute-def-or-class
|
||
%c:py-execute-string
|
||
%c:py-shell
|
||
|
||
@VARIABLES
|
||
|
||
py-indent-offset\tindentation increment
|
||
py-block-comment-prefix\tcomment string used by comment-region
|
||
|
||
py-python-command\tshell command to invoke Python interpreter
|
||
py-temp-directory\tdirectory used for temp files (if needed)
|
||
|
||
py-beep-if-tab-change\tring the bell if tab-width is changed
|
||
%v:py-indent-offset
|
||
%v:py-block-comment-prefix
|
||
%v:py-python-command
|
||
%v:py-temp-directory
|
||
%v:py-beep-if-tab-change
|
||
|
||
@KINDS OF LINES
|
||
|
||
Each physical line in the file is either a `continuation line' (the
|
||
preceding line ends with a backslash that's not part of a comment, or
|
||
the paren/bracket/brace nesting level at the start of the line is
|
||
non-zero, or both) or an `initial line' (everything else).
|
||
|
||
An initial line is in turn a `blank line' (contains nothing except
|
||
possibly blanks or tabs), a `comment line' (leftmost non-blank
|
||
character is `#'), or a `code line' (everything else).
|
||
|
||
Comment Lines
|
||
|
||
Although all comment lines are treated alike by Python, Python mode
|
||
recognizes two kinds that act differently with respect to indentation.
|
||
|
||
An `indenting comment line' is a comment line with a blank, tab or
|
||
nothing after the initial `#'. The indentation commands (see below)
|
||
treat these exactly as if they were code lines: a line following an
|
||
indenting comment line will be indented like the comment line. All
|
||
other comment lines (those with a non-whitespace character immediately
|
||
following the initial `#') are `non-indenting comment lines', and
|
||
their indentation is ignored by the indentation commands.
|
||
|
||
Indenting comment lines are by far the usual case, and should be used
|
||
whenever possible. Non-indenting comment lines are useful in cases
|
||
like these:
|
||
|
||
\ta = b # a very wordy single-line comment that ends up being
|
||
\t #... continued onto another line
|
||
|
||
\tif a == b:
|
||
##\t\tprint 'panic!' # old code we've `commented out'
|
||
\t\treturn a
|
||
|
||
Since the `#...' and `##' comment lines have a non-whitespace
|
||
character following the initial `#', Python mode ignores them when
|
||
computing the proper indentation for the next line.
|
||
|
||
Continuation Lines and Statements
|
||
|
||
The Python-mode commands generally work on statements instead of on
|
||
individual lines, where a `statement' is a comment or blank line, or a
|
||
code line and all of its following continuation lines (if any)
|
||
considered as a single logical unit. The commands in this mode
|
||
generally (when it makes sense) automatically move to the start of the
|
||
statement containing point, even if point happens to be in the middle
|
||
of some continuation line.
|
||
|
||
|
||
@INDENTATION
|
||
|
||
Primarily for entering new code:
|
||
\t\\[indent-for-tab-command]\t indent line appropriately
|
||
\t\\[py-newline-and-indent]\t insert newline, then indent
|
||
\t\\[py-electric-backspace]\t reduce indentation, or delete single character
|
||
|
||
Primarily for reindenting existing code:
|
||
\t\\[py-guess-indent-offset]\t guess py-indent-offset from file content; change locally
|
||
\t\\[universal-argument] \\[py-guess-indent-offset]\t ditto, but change globally
|
||
|
||
\t\\[py-indent-region]\t reindent region to match its context
|
||
\t\\[py-shift-region-left]\t shift region left by py-indent-offset
|
||
\t\\[py-shift-region-right]\t shift region right by py-indent-offset
|
||
|
||
Unlike most programming languages, Python uses indentation, and only
|
||
indentation, to specify block structure. Hence the indentation supplied
|
||
automatically by Python-mode is just an educated guess: only you know
|
||
the block structure you intend, so only you can supply correct
|
||
indentation.
|
||
|
||
The \\[indent-for-tab-command] and \\[py-newline-and-indent] keys try to suggest plausible indentation, based on
|
||
the indentation of preceding statements. E.g., assuming
|
||
py-indent-offset is 4, after you enter
|
||
\tif a > 0: \\[py-newline-and-indent]
|
||
the cursor will be moved to the position of the `_' (_ is not a
|
||
character in the file, it's just used here to indicate the location of
|
||
the cursor):
|
||
\tif a > 0:
|
||
\t _
|
||
If you then enter `c = d' \\[py-newline-and-indent], the cursor will move
|
||
to
|
||
\tif a > 0:
|
||
\t c = d
|
||
\t _
|
||
Python-mode cannot know whether that's what you intended, or whether
|
||
\tif a > 0:
|
||
\t c = d
|
||
\t_
|
||
was your intent. In general, Python-mode either reproduces the
|
||
indentation of the (closest code or indenting-comment) preceding
|
||
statement, or adds an extra py-indent-offset blanks if the preceding
|
||
statement has `:' as its last significant (non-whitespace and non-
|
||
comment) character. If the suggested indentation is too much, use
|
||
\\[py-electric-backspace] to reduce it.
|
||
|
||
Continuation lines are given extra indentation. If you don't like the
|
||
suggested indentation, change it to something you do like, and Python-
|
||
mode will strive to indent later lines of the statement in the same way.
|
||
|
||
If a line is a continuation line by virtue of being in an unclosed
|
||
paren/bracket/brace structure (`list', for short), the suggested
|
||
indentation depends on whether the current line contains the first item
|
||
in the list. If it does, it's indented py-indent-offset columns beyond
|
||
the indentation of the line containing the open bracket. If you don't
|
||
like that, change it by hand. The remaining items in the list will mimic
|
||
whatever indentation you give to the first item.
|
||
|
||
If a line is a continuation line because the line preceding it ends with
|
||
a backslash, the third and following lines of the statement inherit their
|
||
indentation from the line preceding them. The indentation of the second
|
||
line in the statement depends on the form of the first (base) line: if
|
||
the base line is an assignment statement with anything more interesting
|
||
than the backslash following the leftmost assigning `=', the second line
|
||
is indented two columns beyond that `='. Else it's indented to two
|
||
columns beyond the leftmost solid chunk of non-whitespace characters on
|
||
the base line.
|
||
|
||
Warning: indent-region should not normally be used! It calls \\[indent-for-tab-command]
|
||
repeatedly, and as explained above, \\[indent-for-tab-command] can't guess the block
|
||
structure you intend.
|
||
%c:indent-for-tab-command
|
||
%c:py-newline-and-indent
|
||
%c:py-electric-backspace
|
||
|
||
|
||
The next function may be handy when editing code you didn't write:
|
||
%c:py-guess-indent-offset
|
||
|
||
|
||
The remaining `indent' functions apply to a region of Python code. They
|
||
assume the block structure (equals indentation, in Python) of the region
|
||
is correct, and alter the indentation in various ways while preserving
|
||
the block structure:
|
||
%c:py-indent-region
|
||
%c:py-shift-region-left
|
||
%c:py-shift-region-right
|
||
|
||
@MARKING & MANIPULATING REGIONS OF CODE
|
||
|
||
\\[py-mark-block]\t mark block of lines
|
||
\\[py-mark-def-or-class]\t mark smallest enclosing def
|
||
\\[universal-argument] \\[py-mark-def-or-class]\t mark smallest enclosing class
|
||
\\[comment-region]\t comment out region of code
|
||
\\[universal-argument] \\[comment-region]\t uncomment region of code
|
||
%c:py-mark-block
|
||
%c:py-mark-def-or-class
|
||
%c:comment-region
|
||
|
||
@MOVING POINT
|
||
|
||
\\[py-previous-statement]\t move to statement preceding point
|
||
\\[py-next-statement]\t move to statement following point
|
||
\\[py-goto-block-up]\t move up to start of current block
|
||
\\[py-beginning-of-def-or-class]\t move to start of def
|
||
\\[universal-argument] \\[py-beginning-of-def-or-class]\t move to start of class
|
||
\\[py-end-of-def-or-class]\t move to end of def
|
||
\\[universal-argument] \\[py-end-of-def-or-class]\t move to end of class
|
||
|
||
The first two move to one statement beyond the statement that contains
|
||
point. A numeric prefix argument tells them to move that many
|
||
statements instead. Blank lines, comment lines, and continuation lines
|
||
do not count as `statements' for these commands. So, e.g., you can go
|
||
to the first code statement in a file by entering
|
||
\t\\[beginning-of-buffer]\t to move to the top of the file
|
||
\t\\[py-next-statement]\t to skip over initial comments and blank lines
|
||
Or do `\\[py-previous-statement]' with a huge prefix argument.
|
||
%c:py-previous-statement
|
||
%c:py-next-statement
|
||
%c:py-goto-block-up
|
||
%c:py-beginning-of-def-or-class
|
||
%c:py-end-of-def-or-class
|
||
|
||
@LITTLE-KNOWN EMACS COMMANDS PARTICULARLY USEFUL IN PYTHON MODE
|
||
|
||
`\\[indent-new-comment-line]' is handy for entering a multi-line comment.
|
||
|
||
`\\[set-selective-display]' with a `small' prefix arg is ideally suited for viewing the
|
||
overall class and def structure of a module.
|
||
|
||
`\\[back-to-indentation]' moves point to a line's first non-blank character.
|
||
|
||
`\\[indent-relative]' is handy for creating odd indentation.
|
||
|
||
@OTHER EMACS HINTS
|
||
|
||
If you don't like the default value of a variable, change its value to
|
||
whatever you do like by putting a `setq' line in your .emacs file.
|
||
E.g., to set the indentation increment to 4, put this line in your
|
||
.emacs:
|
||
\t(setq py-indent-offset 4)
|
||
To see the value of a variable, do `\\[describe-variable]' and enter the variable
|
||
name at the prompt.
|
||
|
||
When entering a key sequence like `C-c C-n', it is not necessary to
|
||
release the CONTROL key after doing the `C-c' part -- it suffices to
|
||
press the CONTROL key, press and release `c' (while still holding down
|
||
CONTROL), press and release `n' (while still holding down CONTROL), &
|
||
then release CONTROL.
|
||
|
||
Entering Python mode calls with no arguments the value of the variable
|
||
`python-mode-hook', if that value exists and is not nil; for backward
|
||
compatibility it also tries `py-mode-hook'; see the `Hooks' section of
|
||
the Elisp manual for details.
|
||
|
||
Obscure: When python-mode is first loaded, it looks for all bindings
|
||
to newline-and-indent in the global keymap, and shadows them with
|
||
local bindings to py-newline-and-indent."))
|
||
|
||
|
||
;; Helper functions
|
||
(defvar py-parse-state-re
|
||
(concat
|
||
"^[ \t]*\\(if\\|elif\\|else\\|while\\|def\\|class\\)\\>"
|
||
"\\|"
|
||
"^[^ #\t\n]"))
|
||
|
||
(defun py-parse-state ()
|
||
"Return the parse state at point (see `parse-partial-sexp' docs)."
|
||
(save-excursion
|
||
(let ((here (point))
|
||
in-listcomp pps done)
|
||
(while (not done)
|
||
;; back up to the first preceding line (if any; else start of
|
||
;; buffer) that begins with a popular Python keyword, or a
|
||
;; non- whitespace and non-comment character. These are good
|
||
;; places to start parsing to see whether where we started is
|
||
;; at a non-zero nesting level. It may be slow for people who
|
||
;; write huge code blocks or huge lists ... tough beans.
|
||
(re-search-backward py-parse-state-re nil 'move)
|
||
;; Watch out for landing inside a list comprehension
|
||
(save-excursion
|
||
(if (and (looking-at "[ \t]*\\<\\(if\\|for\\)\\>")
|
||
(py-safe (progn (up-list -1) t))
|
||
(eq (char-after) ?\[))
|
||
(setq in-listcomp (point))
|
||
(setq in-listcomp nil)))
|
||
(beginning-of-line)
|
||
;; In XEmacs, we have a much better way to test for whether
|
||
;; we're in a triple-quoted string or not. Emacs does not
|
||
;; have this built-in function, which is its loss because
|
||
;; without scanning from the beginning of the buffer, there's
|
||
;; no accurate way to determine this otherwise.
|
||
(if (not (fboundp 'buffer-syntactic-context))
|
||
;; Emacs
|
||
(progn
|
||
(save-excursion (setq pps (parse-partial-sexp (point) here)))
|
||
;; make sure we don't land inside a triple-quoted string
|
||
(setq done (or (not (nth 3 pps))
|
||
(bobp)))
|
||
;; Just go ahead and short circuit the test back to the
|
||
;; beginning of the buffer. This will be slow, but not
|
||
;; nearly as slow as looping through many
|
||
;; re-search-backwards.
|
||
(if (not done)
|
||
(goto-char (point-min))))
|
||
;; XEmacs
|
||
(setq done (or (not (buffer-syntactic-context))
|
||
(bobp)))
|
||
(when in-listcomp
|
||
(goto-char in-listcomp)
|
||
(setq done nil))
|
||
(when done
|
||
(setq pps (parse-partial-sexp (point) here)))
|
||
))
|
||
pps)))
|
||
|
||
(defun py-nesting-level ()
|
||
"Return the buffer position of the last unclosed enclosing list.
|
||
If nesting level is zero, return nil."
|
||
(let ((status (py-parse-state)))
|
||
(if (zerop (car status))
|
||
nil ; not in a nest
|
||
(car (cdr status))))) ; char# of open bracket
|
||
|
||
(defun py-backslash-continuation-line-p ()
|
||
"Return t iff preceding line ends with backslash that is not in a comment."
|
||
(save-excursion
|
||
(beginning-of-line)
|
||
(and
|
||
;; use a cheap test first to avoid the regexp if possible
|
||
;; use 'eq' because char-after may return nil
|
||
(eq (char-after (- (point) 2)) ?\\ )
|
||
;; make sure; since eq test passed, there is a preceding line
|
||
(forward-line -1) ; always true -- side effect
|
||
(looking-at py-continued-re))))
|
||
|
||
(defun py-continuation-line-p ()
|
||
"Return t iff current line is a continuation line."
|
||
(save-excursion
|
||
(beginning-of-line)
|
||
(or (py-backslash-continuation-line-p)
|
||
(py-nesting-level))))
|
||
|
||
(defun py-goto-beginning-of-tqs (delim)
|
||
"Go to the beginning of the triple quoted string we find ourselves in.
|
||
DELIM is the TQS string delimiter character we're searching backwards
|
||
for."
|
||
(let ((skip (and delim (make-string 1 delim)))
|
||
(continue t))
|
||
(when skip
|
||
(save-excursion
|
||
(while continue
|
||
(py-safe (search-backward skip))
|
||
(setq continue (and (not (bobp))
|
||
(= (char-before) ?\\))))
|
||
(if (and (= (char-before) delim)
|
||
(= (char-before (1- (point))) delim))
|
||
(setq skip (make-string 3 delim))))
|
||
;; we're looking at a triple-quoted string
|
||
(py-safe (search-backward skip)))))
|
||
|
||
(defun py-goto-initial-line ()
|
||
"Go to the initial line of the current statement.
|
||
Usually this is the line we're on, but if we're on the 2nd or
|
||
following lines of a continuation block, we need to go up to the first
|
||
line of the block."
|
||
;; Tricky: We want to avoid quadratic-time behavior for long
|
||
;; continued blocks, whether of the backslash or open-bracket
|
||
;; varieties, or a mix of the two. The following manages to do that
|
||
;; in the usual cases.
|
||
;;
|
||
;; Also, if we're sitting inside a triple quoted string, this will
|
||
;; drop us at the line that begins the string.
|
||
(let (open-bracket-pos)
|
||
(while (py-continuation-line-p)
|
||
(beginning-of-line)
|
||
(if (py-backslash-continuation-line-p)
|
||
(while (py-backslash-continuation-line-p)
|
||
(forward-line -1))
|
||
;; else zip out of nested brackets/braces/parens
|
||
(while (setq open-bracket-pos (py-nesting-level))
|
||
(goto-char open-bracket-pos)))))
|
||
(beginning-of-line))
|
||
|
||
(defun py-goto-beyond-final-line ()
|
||
"Go to the point just beyond the fine line of the current statement.
|
||
Usually this is the start of the next line, but if this is a
|
||
multi-line statement we need to skip over the continuation lines."
|
||
;; Tricky: Again we need to be clever to avoid quadratic time
|
||
;; behavior.
|
||
;;
|
||
;; XXX: Not quite the right solution, but deals with multi-line doc
|
||
;; strings
|
||
(if (looking-at (concat "[ \t]*\\(" py-stringlit-re "\\)"))
|
||
(goto-char (match-end 0)))
|
||
;;
|
||
(forward-line 1)
|
||
(let (state)
|
||
(while (and (py-continuation-line-p)
|
||
(not (eobp)))
|
||
;; skip over the backslash flavor
|
||
(while (and (py-backslash-continuation-line-p)
|
||
(not (eobp)))
|
||
(forward-line 1))
|
||
;; if in nest, zip to the end of the nest
|
||
(setq state (py-parse-state))
|
||
(if (and (not (zerop (car state)))
|
||
(not (eobp)))
|
||
(progn
|
||
(parse-partial-sexp (point) (point-max) 0 nil state)
|
||
(forward-line 1))))))
|
||
|
||
(defun py-statement-opens-block-p ()
|
||
"Return t iff the current statement opens a block.
|
||
I.e., iff it ends with a colon that is not in a comment. Point should
|
||
be at the start of a statement."
|
||
(save-excursion
|
||
(let ((start (point))
|
||
(finish (progn (py-goto-beyond-final-line) (1- (point))))
|
||
(searching t)
|
||
(answer nil)
|
||
state)
|
||
(goto-char start)
|
||
(while searching
|
||
;; look for a colon with nothing after it except whitespace, and
|
||
;; maybe a comment
|
||
(if (re-search-forward ":\\([ \t]\\|\\\\\n\\)*\\(#.*\\)?$"
|
||
finish t)
|
||
(if (eq (point) finish) ; note: no `else' clause; just
|
||
; keep searching if we're not at
|
||
; the end yet
|
||
;; sure looks like it opens a block -- but it might
|
||
;; be in a comment
|
||
(progn
|
||
(setq searching nil) ; search is done either way
|
||
(setq state (parse-partial-sexp start
|
||
(match-beginning 0)))
|
||
(setq answer (not (nth 4 state)))))
|
||
;; search failed: couldn't find another interesting colon
|
||
(setq searching nil)))
|
||
answer)))
|
||
|
||
(defun py-statement-closes-block-p ()
|
||
"Return t iff the current statement closes a block.
|
||
I.e., if the line starts with `return', `raise', `break', `continue',
|
||
and `pass'. This doesn't catch embedded statements."
|
||
(let ((here (point)))
|
||
(py-goto-initial-line)
|
||
(back-to-indentation)
|
||
(prog1
|
||
(looking-at (concat py-block-closing-keywords-re "\\>"))
|
||
(goto-char here))))
|
||
|
||
(defun py-goto-beyond-block ()
|
||
"Go to point just beyond the final line of block begun by the current line.
|
||
This is the same as where `py-goto-beyond-final-line' goes unless
|
||
we're on colon line, in which case we go to the end of the block.
|
||
Assumes point is at the beginning of the line."
|
||
(if (py-statement-opens-block-p)
|
||
(py-mark-block nil 'just-move)
|
||
(py-goto-beyond-final-line)))
|
||
|
||
(defun py-goto-statement-at-or-above ()
|
||
"Go to the start of the first statement at or preceding point.
|
||
Return t if there is such a statement, otherwise nil. `Statement'
|
||
does not include blank lines, comments, or continuation lines."
|
||
(py-goto-initial-line)
|
||
(if (looking-at py-blank-or-comment-re)
|
||
;; skip back over blank & comment lines
|
||
;; note: will skip a blank or comment line that happens to be
|
||
;; a continuation line too
|
||
(if (re-search-backward "^[ \t]*[^ \t#\n]" nil t)
|
||
(progn (py-goto-initial-line) t)
|
||
nil)
|
||
t))
|
||
|
||
(defun py-goto-statement-below ()
|
||
"Go to start of the first statement following the statement containing point.
|
||
Return t if there is such a statement, otherwise nil. `Statement'
|
||
does not include blank lines, comments, or continuation lines."
|
||
(beginning-of-line)
|
||
(let ((start (point)))
|
||
(py-goto-beyond-final-line)
|
||
(while (and
|
||
(looking-at py-blank-or-comment-re)
|
||
(not (eobp)))
|
||
(forward-line 1))
|
||
(if (eobp)
|
||
(progn (goto-char start) nil)
|
||
t)))
|
||
|
||
(defun py-go-up-tree-to-keyword (key)
|
||
"Go to begining of statement starting with KEY, at or preceding point.
|
||
|
||
KEY is a regular expression describing a Python keyword. Skip blank
|
||
lines and non-indenting comments. If the statement found starts with
|
||
KEY, then stop, otherwise go back to first enclosing block starting
|
||
with KEY. If successful, leave point at the start of the KEY line and
|
||
return t. Otherwise, leav point at an undefined place and return nil."
|
||
;; skip blanks and non-indenting #
|
||
(py-goto-initial-line)
|
||
(while (and
|
||
(looking-at "[ \t]*\\($\\|#[^ \t\n]\\)")
|
||
(zerop (forward-line -1))) ; go back
|
||
nil)
|
||
(py-goto-initial-line)
|
||
(let* ((re (concat "[ \t]*" key "\\b"))
|
||
(case-fold-search nil) ; let* so looking-at sees this
|
||
(found (looking-at re))
|
||
(dead nil))
|
||
(while (not (or found dead))
|
||
(condition-case nil ; in case no enclosing block
|
||
(py-goto-block-up 'no-mark)
|
||
(error (setq dead t)))
|
||
(or dead (setq found (looking-at re))))
|
||
(beginning-of-line)
|
||
found))
|
||
|
||
(defun py-suck-up-leading-text ()
|
||
"Return string in buffer from start of indentation to end of line.
|
||
Prefix with \"...\" if leading whitespace was skipped."
|
||
(save-excursion
|
||
(back-to-indentation)
|
||
(concat
|
||
(if (bolp) "" "...")
|
||
(buffer-substring (point) (progn (end-of-line) (point))))))
|
||
|
||
(defun py-suck-up-first-keyword ()
|
||
"Return first keyword on the line as a Lisp symbol.
|
||
`Keyword' is defined (essentially) as the regular expression
|
||
([a-z]+). Returns nil if none was found."
|
||
(let ((case-fold-search nil))
|
||
(if (looking-at "[ \t]*\\([a-z]+\\)\\b")
|
||
(intern (buffer-substring (match-beginning 1) (match-end 1)))
|
||
nil)))
|
||
|
||
(defun py-current-defun ()
|
||
"Python value for `add-log-current-defun-function'.
|
||
This tells add-log.el how to find the current function/method/variable."
|
||
(save-excursion
|
||
(if (re-search-backward py-defun-start-re nil t)
|
||
(or (match-string 3)
|
||
(let ((method (match-string 2)))
|
||
(if (and (not (zerop (length (match-string 1))))
|
||
(re-search-backward py-class-start-re nil t))
|
||
(concat (match-string 1) "." method)
|
||
method)))
|
||
nil)))
|
||
|
||
|
||
(defconst py-help-address "python-mode@python.org"
|
||
"Address accepting submission of bug reports.")
|
||
|
||
(defun py-version ()
|
||
"Echo the current version of `python-mode' in the minibuffer."
|
||
(interactive)
|
||
(message "Using `python-mode' version %s" py-version)
|
||
(py-keep-region-active))
|
||
|
||
;; only works under Emacs 19
|
||
;(eval-when-compile
|
||
; (require 'reporter))
|
||
|
||
(defun py-submit-bug-report (enhancement-p)
|
||
"Submit via mail a bug report on `python-mode'.
|
||
With \\[universal-argument] (programmatically, argument ENHANCEMENT-P
|
||
non-nil) just submit an enhancement request."
|
||
(interactive
|
||
(list (not (y-or-n-p
|
||
"Is this a bug report (hit `n' to send other comments)? "))))
|
||
(let ((reporter-prompt-for-summary-p (if enhancement-p
|
||
"(Very) brief summary: "
|
||
t)))
|
||
(require 'reporter)
|
||
(reporter-submit-bug-report
|
||
py-help-address ;address
|
||
(concat "python-mode " py-version) ;pkgname
|
||
;; varlist
|
||
(if enhancement-p nil
|
||
'(py-python-command
|
||
py-indent-offset
|
||
py-block-comment-prefix
|
||
py-temp-directory
|
||
py-beep-if-tab-change))
|
||
nil ;pre-hooks
|
||
nil ;post-hooks
|
||
"Dear Barry,") ;salutation
|
||
(if enhancement-p nil
|
||
(set-mark (point))
|
||
(insert
|
||
"Please replace this text with a sufficiently large code sample\n\
|
||
and an exact recipe so that I can reproduce your problem. Failure\n\
|
||
to do so may mean a greater delay in fixing your bug.\n\n")
|
||
(exchange-point-and-mark)
|
||
(py-keep-region-active))))
|
||
|
||
|
||
(defun py-kill-emacs-hook ()
|
||
"Delete files in `py-file-queue'.
|
||
These are Python temporary files awaiting execution."
|
||
(mapcar #'(lambda (filename)
|
||
(py-safe (delete-file filename)))
|
||
py-file-queue))
|
||
|
||
;; arrange to kill temp files when Emacs exists
|
||
(add-hook 'kill-emacs-hook 'py-kill-emacs-hook)
|
||
(add-hook 'comint-output-filter-functions 'py-pdbtrack-track-stack-file)
|
||
|
||
;; Add a designator to the minor mode strings
|
||
(or (assq 'py-pdbtrack-minor-mode-string minor-mode-alist)
|
||
(push '(py-pdbtrack-is-tracking-p py-pdbtrack-minor-mode-string)
|
||
minor-mode-alist))
|
||
|
||
|
||
|
||
(provide 'python-mode)
|
||
;;; python-mode.el ends here
|