mirror of https://github.com/python/cpython
2518 lines
94 KiB
EmacsLisp
2518 lines
94 KiB
EmacsLisp
;;; python-mode.el --- Major mode for editing Python programs
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;; Copyright (C) 1992,1993,1994 Tim Peters
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;; Author: 1995-1997 Barry A. Warsaw
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;; 1992-1994 Tim Peters
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;; Maintainer: python-mode@python.org
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;; Created: Feb 1992
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;; Keywords: python languages oop
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(defconst py-version "$Revision$"
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"`python-mode' version number.")
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;; This software is provided as-is, without express or implied
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;; warranty. Permission to use, copy, modify, distribute or sell this
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;; software, without fee, for any purpose and by any individual or
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;; organization, is hereby granted, provided that the above copyright
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;; notice and this paragraph appear in all copies.
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;;; Commentary:
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;; This is a major mode for editing Python programs. It was developed
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;; by Tim Peters after an original idea by Michael A. Guravage. Tim
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;; subsequently left the net; in 1995, Barry Warsaw inherited the
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;; mode and is the current maintainer.
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;; Note: this version of python-mode.el is no longer compatible with
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;; Emacs 18. For a gabazillion reasons, I highly recommend upgrading
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;; to X/Emacs 19 or X/Emacs 20. For older versions of the 19 series,
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;; you may need to acquire the Custom library.
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;; python-mode.el is currently distributed with XEmacs 19 and XEmacs
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;; 20. Since this file is not GPL'd it is not distributed with Emacs,
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;; but it is compatible with 19.34 and the current 20 series Emacsen.
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;; By default, in XEmacs when you visit a .py file, it is put in
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;; Python mode. In Emacs, you need to add the following to your
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;; .emacs file (you don't need this for XEmacs):
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;;
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;; (autoload 'python-mode "python-mode" "Python editing mode." t)
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;; (setq auto-mode-alist
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;; (cons '("\\.py$" . python-mode) auto-mode-alist))
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;; (setq interpreter-mode-alist
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;; (cons '("python" . python-mode) interpreter-mode-alist))
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;;
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;; Assuming python-mode.el is on your load-path, it will be invoked
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;; when you visit a .py file, or a file with a first line that looks
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;; like:
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;;
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;; #! /usr/bin/env python
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;; If you want font-lock support for Python source code (a.k.a. syntax
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;; coloring, highlighting), add this to your .emacs file:
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;;
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;; (add-hook 'python-mode-hook 'turn-on-font-lock)
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;;
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;; Again, this should not be necessary for XEmacs, since it Just Works.
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;; To submit bug reports, use C-c C-b. Please include a complete, but
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;; concise code sample and a recipe for reproducing the bug. Send
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;; suggestions and other comments to python-mode@python.org.
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;; When in a Python mode buffer, do a C-h m for more help. It's
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;; doubtful that a texinfo manual would be very useful.
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;; Here's a brief to do list:
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;;
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;; - Better integration with gud-mode for debugging.
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;; - Rewrite according to GNU Emacs Lisp standards.
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;; - possibly force indent-tabs-mode == nil, and add a
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;; write-file-hooks that runs untabify on the whole buffer (to work
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;; around potential tab/space mismatch problems). In practice this
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;; hasn't been a problem... yet.
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;; - have py-execute-region on indented code act as if the region is
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;; left justified. Avoids syntax errors.
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;; - Add a py-goto-error or some such that would scan an exception in
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;; the py-shell buffer, and pop you to that line in the file.
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;;; Code:
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(require 'custom)
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;; user definable variables
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;; vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
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(defgroup python nil
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"Support for the Python programming language, <http://www.python.org/>"
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:group 'languages)
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(defcustom py-python-command "python"
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"*Shell command used to start Python interpreter."
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:type 'string
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:group 'python)
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(defcustom py-indent-offset 4
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"*Amount of offset per level of indentation
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Note that `\\[py-guess-indent-offset]' can usually guess a good value
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when you're editing someone else's Python code."
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:type 'integer
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:group 'python)
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(defcustom py-align-multiline-strings-p t
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"*Flag describing how multi-line triple quoted strings are aligned.
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When this flag is non-nil, continuation lines are lined up under the
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preceding line's indentation. When this flag is nil, continuation
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lines are aligned to column zero."
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:type '(choice (const :tag "Align under preceding line" t)
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(const :tag "Align to column zero" nil))
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:group 'python)
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(defcustom py-block-comment-prefix "## "
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"*String used by \\[comment-region] to comment out a block of code.
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This should follow the convention for non-indenting comment lines so
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that the indentation commands won't get confused (i.e., the string
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should be of the form `#x...' where `x' is not a blank or a tab, and
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`...' is arbitrary)."
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:type 'string
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:group 'python)
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(defcustom py-honor-comment-indentation t
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"*Controls how comment lines influence subsequent indentation.
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When nil, all comment lines are skipped for indentation purposes, and
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if possible, a faster algorithm is used (i.e. X/Emacs 19 and beyond).
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When t, lines that begin with a single `#' are a hint to subsequent
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line indentation. If the previous line is such a comment line (as
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opposed to one that starts with `py-block-comment-prefix'), then it's
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indentation is used as a hint for this line's indentation. Lines that
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begin with `py-block-comment-prefix' are ignored for indentation
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purposes.
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When not nil or t, comment lines that begin with a `#' are used as
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indentation hints, unless the comment character is in column zero."
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:type '(choice
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(const :tag "Skip all comment lines (fast)" nil)
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(const :tag "Single # `sets' indentation for next line" t)
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(const :tag "Single # `sets' indentation except at column zero"
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other)
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)
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:group 'python)
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(defcustom py-scroll-process-buffer t
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"*Scroll Python process buffer as output arrives.
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If nil, the Python process buffer acts, with respect to scrolling, like
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Shell-mode buffers normally act. This is surprisingly complicated and
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so won't be explained here; in fact, you can't get the whole story
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without studying the Emacs C code.
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If non-nil, the behavior is different in two respects (which are
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slightly inaccurate in the interest of brevity):
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- If the buffer is in a window, and you left point at its end, the
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window will scroll as new output arrives, and point will move to the
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buffer's end, even if the window is not the selected window (that
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being the one the cursor is in). The usual behavior for shell-mode
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windows is not to scroll, and to leave point where it was, if the
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buffer is in a window other than the selected window.
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- If the buffer is not visible in any window, and you left point at
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its end, the buffer will be popped into a window as soon as more
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output arrives. This is handy if you have a long-running
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computation and don't want to tie up screen area waiting for the
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output. The usual behavior for a shell-mode buffer is to stay
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invisible until you explicitly visit it.
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Note the `and if you left point at its end' clauses in both of the
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above: you can `turn off' the special behaviors while output is in
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progress, by visiting the Python buffer and moving point to anywhere
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besides the end. Then the buffer won't scroll, point will remain where
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you leave it, and if you hide the buffer it will stay hidden until you
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visit it again. You can enable and disable the special behaviors as
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often as you like, while output is in progress, by (respectively) moving
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point to, or away from, the end of the buffer.
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Warning: If you expect a large amount of output, you'll probably be
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happier setting this option to nil.
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Obscure: `End of buffer' above should really say `at or beyond the
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process mark', but if you know what that means you didn't need to be
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told <grin>."
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:type 'boolean
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:group 'python)
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(defcustom py-temp-directory
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(let ((ok '(lambda (x)
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(and x
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(setq x (expand-file-name x)) ; always true
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(file-directory-p x)
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(file-writable-p x)
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x))))
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(or (funcall ok (getenv "TMPDIR"))
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(funcall ok "/usr/tmp")
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(funcall ok "/tmp")
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(funcall ok ".")
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(error
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"Couldn't find a usable temp directory -- set py-temp-directory")))
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"*Directory used for temp files created by a *Python* process.
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By default, the first directory from this list that exists and that you
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can write into: the value (if any) of the environment variable TMPDIR,
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/usr/tmp, /tmp, or the current directory."
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:type 'string
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:group 'python)
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(defcustom py-beep-if-tab-change t
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"*Ring the bell if tab-width is changed.
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If a comment of the form
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\t# vi:set tabsize=<number>:
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is found before the first code line when the file is entered, and the
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current value of (the general Emacs variable) `tab-width' does not
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equal <number>, `tab-width' is set to <number>, a message saying so is
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displayed in the echo area, and if `py-beep-if-tab-change' is non-nil
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the Emacs bell is also rung as a warning."
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:type 'boolean
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:group 'python)
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(defcustom py-backspace-function 'backward-delete-char-untabify
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"*Function called by `py-electric-backspace' when deleting backwards."
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:type 'function
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:group 'python)
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(defcustom py-delete-function 'delete-char
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"*Function called by `py-electric-delete' when deleting forwards."
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:type 'function
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:group 'python)
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;; ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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;; NO USER DEFINABLE VARIABLES BEYOND THIS POINT
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(defconst py-emacs-features
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(let (features)
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;; NTEmacs 19.34.6 has a broken make-temp-name; it always returns
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;; the same string.
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(let ((tmp1 (make-temp-name ""))
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(tmp2 (make-temp-name "")))
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(if (string-equal tmp1 tmp2)
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(push 'broken-temp-names features)))
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;; return the features
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features)
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"A list of features extant in the Emacs you are using.
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There are many flavors of Emacs out there, with different levels of
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support for features needed by `python-mode'.")
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(defvar python-font-lock-keywords
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(let ((kw1 (mapconcat 'identity
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'("and" "assert" "break" "class"
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"continue" "def" "del" "elif"
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"else" "except" "exec" "for"
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"from" "global" "if" "import"
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"in" "is" "lambda" "not"
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"or" "pass" "print" "raise"
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"return" "while"
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)
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"\\|"))
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(kw2 (mapconcat 'identity
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'("else:" "except:" "finally:" "try:")
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"\\|"))
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)
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(list
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;; keywords
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(cons (concat "\\b\\(" kw1 "\\)\\b[ \n\t(]") 1)
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;; block introducing keywords with immediately following colons.
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;; Yes "except" is in both lists.
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(cons (concat "\\b\\(" kw2 "\\)[ \n\t(]") 1)
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;; classes
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'("\\bclass[ \t]+\\([a-zA-Z_]+[a-zA-Z0-9_]*\\)"
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1 font-lock-type-face)
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;; functions
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'("\\bdef[ \t]+\\([a-zA-Z_]+[a-zA-Z0-9_]*\\)"
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1 font-lock-function-name-face)
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))
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"Additional expressions to highlight in Python mode.")
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(put 'python-mode 'font-lock-defaults '(python-font-lock-keywords))
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(defvar imenu-example--python-show-method-args-p nil
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"*Controls echoing of arguments of functions & methods in the imenu buffer.
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When non-nil, arguments are printed.")
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(make-variable-buffer-local 'py-indent-offset)
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;; have to bind py-file-queue before installing the kill-emacs hook
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(defvar py-file-queue nil
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"Queue of Python temp files awaiting execution.
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Currently-active file is at the head of the list.")
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;; Constants
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;; Regexp matching a Python string literal
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(defconst py-stringlit-re
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(concat
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"'\\([^'\n\\]\\|\\\\.\\)*'" ; single-quoted
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"\\|" ; or
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"\"\\([^\"\n\\]\\|\\\\.\\)*\"")) ; double-quoted
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;; Regexp matching Python lines that are continued via backslash.
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;; This is tricky because a trailing backslash does not mean
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;; continuation if it's in a comment
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(defconst py-continued-re
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(concat
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"\\(" "[^#'\"\n\\]" "\\|" py-stringlit-re "\\)*"
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"\\\\$"))
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;; Regexp matching blank or comment lines.
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(defconst py-blank-or-comment-re "[ \t]*\\($\\|#\\)")
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;; Regexp matching clauses to be outdented one level.
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(defconst py-outdent-re
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(concat "\\(" (mapconcat 'identity
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'("else:"
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"except\\(\\s +.*\\)?:"
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"finally:"
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"elif\\s +.*:")
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"\\|")
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"\\)"))
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;; Regexp matching keywords which typically close a block
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(defconst py-block-closing-keywords-re
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"\\(return\\|raise\\|break\\|continue\\|pass\\)")
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;; Regexp matching lines to not outdent after.
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(defconst py-no-outdent-re
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(concat
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"\\("
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(mapconcat 'identity
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(list "try:"
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"except\\(\\s +.*\\)?:"
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"while\\s +.*:"
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"for\\s +.*:"
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"if\\s +.*:"
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"elif\\s +.*:"
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(concat py-block-closing-keywords-re "[ \t\n]")
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)
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"\\|")
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"\\)"))
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;; Regexp matching a function, method or variable assignment. If you
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;; change this, you probably have to change `py-current-defun' as
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;; well. This is only used by `py-current-defun' to find the name for
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;; add-log.el.
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(defvar py-defun-start-re
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"^\\([ \t]*\\)def[ \t]+\\([a-zA-Z_0-9]+\\)\\|\\(^[a-zA-Z_0-9]+\\)[ \t]*=")
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;; Regexp for finding a class name. If you change this, you probably
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;; have to change `py-current-defun' as well. This is only used by
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;; `py-current-defun' to find the name for add-log.el.
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(defvar py-class-start-re "^class[ \t]*\\([a-zA-Z_0-9]+\\)")
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;; Utilities
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(defmacro py-safe (&rest body)
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;; safely execute BODY, return nil if an error occurred
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(` (condition-case nil
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(progn (,@ body))
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(error nil))))
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(defsubst py-keep-region-active ()
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;; Do whatever is necessary to keep the region active in XEmacs.
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;; Ignore byte-compiler warnings you might see. Also note that
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;; FSF's Emacs 19 does it differently; its policy doesn't require us
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;; to take explicit action.
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(and (boundp 'zmacs-region-stays)
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(setq zmacs-region-stays t)))
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;; Major mode boilerplate
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;; define a mode-specific abbrev table for those who use such things
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(defvar python-mode-abbrev-table nil
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"Abbrev table in use in `python-mode' buffers.")
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(define-abbrev-table 'python-mode-abbrev-table nil)
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(defvar python-mode-hook nil
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"*Hook called by `python-mode'.")
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;; in previous version of python-mode.el, the hook was incorrectly
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;; called py-mode-hook, and was not defvar'd. deprecate its use.
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(and (fboundp 'make-obsolete-variable)
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(make-obsolete-variable 'py-mode-hook 'python-mode-hook))
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(defvar py-mode-map ()
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"Keymap used in `python-mode' buffers.")
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(if py-mode-map
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nil
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(setq py-mode-map (make-sparse-keymap))
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;; electric keys
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(define-key py-mode-map ":" 'py-electric-colon)
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;; indentation level modifiers
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(define-key py-mode-map "\C-c\C-l" 'py-shift-region-left)
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(define-key py-mode-map "\C-c\C-r" 'py-shift-region-right)
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(define-key py-mode-map "\C-c<" 'py-shift-region-left)
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(define-key py-mode-map "\C-c>" 'py-shift-region-right)
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;; subprocess commands
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||
(define-key py-mode-map "\C-c\C-c" 'py-execute-buffer)
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(define-key py-mode-map "\C-c|" 'py-execute-region)
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(define-key py-mode-map "\C-c!" 'py-shell)
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;; Caution! Enter here at your own risk. We are trying to support
|
||
;; several behaviors and it gets disgusting. :-( This logic ripped
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;; largely from CC Mode.
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;;
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||
;; In XEmacs 19, Emacs 19, and Emacs 20, we use this to bind
|
||
;; backwards deletion behavior to DEL, which both Delete and
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||
;; 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.
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||
(if (not (boundp 'delete-key-deletes-forward))
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||
(define-key py-mode-map "\177" 'py-electric-backspace)
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||
;; 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)
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||
(define-key py-mode-map [backspace] 'py-electric-backspace))
|
||
;; marking interesting locations
|
||
(define-key py-mode-map "\C-c\C-m" '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-n" 'py-next-statement)
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||
(define-key py-mode-map "\C-c\C-p" 'py-previous-statement)
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||
(define-key py-mode-map "\C-c\C-u" 'py-goto-block-up)
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||
(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" 'beginning-of-python-def-or-class)
|
||
(define-key py-mode-map "\e\C-e" 'end-of-python-def-or-class)
|
||
;; 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)
|
||
;; py-newline-and-indent mappings
|
||
(define-key py-mode-map "\n" 'py-newline-and-indent)
|
||
;; 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 (function (lambda (key)
|
||
(define-key
|
||
py-mode-map key 'py-newline-and-indent)))
|
||
(where-is-internal 'newline-and-indent))
|
||
)
|
||
|
||
(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.
|
||
(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)
|
||
)
|
||
|
||
|
||
|
||
;; 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)]
|
||
"-"
|
||
["Execute buffer" py-execute-buffer t]
|
||
["Execute region" py-execute-region (mark)]
|
||
["Start interpreter..." py-shell t]
|
||
"-"
|
||
["Go to start of block" py-goto-block-up t]
|
||
["Go to start of class" (beginning-of-python-def-or-class t) t]
|
||
["Move to end of class" (end-of-python-def-or-class t) t]
|
||
["Move to start of def" beginning-of-python-def-or-class t]
|
||
["Move to end of def" end-of-python-def-or-class t]
|
||
"-"
|
||
["Describe mode" py-describe-mode t]
|
||
)))
|
||
|
||
|
||
|
||
;; imenu definitions, courtesy of Perry A. Stoll <stoll@atr-sw.atr.co.jp>
|
||
(defvar imenu-example--python-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 imenu-example--python-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]*\\))"
|
||
"\\)" ; end of def
|
||
"[ \t]*:" ; and then the :
|
||
"\\)" ; >>methods and functions<<
|
||
)
|
||
"Regexp for Python methods/functions for use with the imenu package."
|
||
)
|
||
|
||
(defvar imenu-example--python-method-no-arg-parens '(2 8)
|
||
"Indicies 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 `imenu-example--python-show-method-args-p' for more
|
||
information.")
|
||
|
||
(defvar imenu-example--python-method-arg-parens '(2 7)
|
||
"Indicies 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 `imenu-example--python-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 imenu-example--generic-python-expression
|
||
(cons
|
||
(concat
|
||
imenu-example--python-class-regexp
|
||
"\\|" ; or...
|
||
imenu-example--python-method-regexp
|
||
)
|
||
imenu-example--python-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 \\[imenu-example--create-python-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 imenu-example--python-generic-regexp nil)
|
||
(defvar imenu-example--python-generic-parens nil)
|
||
|
||
|
||
;;;###autoload
|
||
(eval-when-compile
|
||
;; Imenu isn't used in XEmacs, so just ignore load errors
|
||
(condition-case ()
|
||
(progn
|
||
(require 'cl)
|
||
(require 'imenu))
|
||
(error nil)))
|
||
|
||
(defun imenu-example--create-python-index ()
|
||
"Python interface function for imenu package.
|
||
Finds all python classes and functions/methods. Calls function
|
||
\\[imenu-example--create-python-index-engine]. See that function for
|
||
the details of how this works."
|
||
(setq imenu-example--python-generic-regexp
|
||
(car imenu-example--generic-python-expression))
|
||
(setq imenu-example--python-generic-parens
|
||
(if imenu-example--python-show-method-args-p
|
||
imenu-example--python-method-arg-parens
|
||
imenu-example--python-method-no-arg-parens))
|
||
(goto-char (point-min))
|
||
(imenu-example--create-python-index-engine nil))
|
||
|
||
(defun imenu-example--create-python-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 \\[imenu-example--create-python-index].
|
||
|
||
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 it's 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 retuns 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 imenu-example--python-generic-parens))
|
||
(def-paren (second imenu-example--python-generic-parens)))
|
||
(setq looking-p
|
||
(re-search-forward imenu-example--python-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 imenu-example--python-generic-parens))
|
||
(let ((cur-paren (if (match-beginning class-paren)
|
||
class-paren def-paren)))
|
||
(setq def-name
|
||
(buffer-substring (match-beginning cur-paren)
|
||
(match-end cur-paren))))
|
||
(beginning-of-line)
|
||
(setq cur-indent (current-indentation)))
|
||
|
||
;; HACK: want to go to the next correct definition location. we
|
||
;; explicitly list them here. 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)
|
||
|
||
;; if we don't have push, use the following...
|
||
;;(setf index-alist (cons (cons def-name def-pos) index-alist))
|
||
(push (cons def-name def-pos) index-alist))
|
||
|
||
;; deeper indented expression, recur...
|
||
((< 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 imenu-example--python-generic-regexp
|
||
(point-min) 'move)
|
||
(setq sub-method-alist (imenu-example--create-python-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 (imenu-create-submenu-name 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 imenu-example--python-generic-regexp
|
||
(point-min) t)))
|
||
(setq prev-name def-name)
|
||
(and looking-p
|
||
(setq looking-p
|
||
(re-search-forward imenu-example--python-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-scroll-process-buffer\t\talways scroll Python process buffer
|
||
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 '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
|
||
paragraph-separate "^[ \t]*$"
|
||
paragraph-start "^[ \t]*$"
|
||
require-final-newline t
|
||
comment-start "# "
|
||
comment-end ""
|
||
comment-start-skip "# *"
|
||
comment-column 40
|
||
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))
|
||
;; hack to allow overriding the tabsize in the file (see tokenizer.c)
|
||
;;
|
||
;; not sure where the magic comment has to be; to save time
|
||
;; searching for a rarity, we give up if it's not found prior to the
|
||
;; first executable statement.
|
||
;;
|
||
;; BAW - on first glance, this seems like complete hackery. Why was
|
||
;; this necessary, and is it still necessary?
|
||
(let ((case-fold-search nil)
|
||
(start (point))
|
||
new-tab-width)
|
||
(if (re-search-forward
|
||
"^[ \t]*#[ \t]*vi:set[ \t]+tabsize=\\([0-9]+\\):"
|
||
(prog2 (py-next-statement 1) (point) (goto-char 1))
|
||
t)
|
||
(progn
|
||
(setq new-tab-width
|
||
(string-to-int
|
||
(buffer-substring (match-beginning 1) (match-end 1))))
|
||
(if (= tab-width new-tab-width)
|
||
nil
|
||
(setq tab-width new-tab-width)
|
||
(message "Caution: tab-width changed to %d" new-tab-width)
|
||
(if py-beep-if-tab-change (beep)))))
|
||
(goto-char start))
|
||
|
||
;; install imenu
|
||
(setq imenu-create-index-function
|
||
(function imenu-example--create-python-index))
|
||
(if (fboundp 'imenu-add-to-menubar)
|
||
(imenu-add-to-menubar (format "%s-%s" "IM" mode-name)))
|
||
|
||
;; run the mode hook. py-mode-hook use is deprecated
|
||
(if python-mode-hook
|
||
(run-hooks 'python-mode-hook)
|
||
(run-hooks 'py-mode-hook)))
|
||
|
||
|
||
;; electric characters
|
||
(defun py-outdent-p ()
|
||
;; returns non-nil if the current line should outdent one level
|
||
(save-excursion
|
||
(and (progn (back-to-indentation)
|
||
(looking-at py-outdent-re))
|
||
(progn (backward-to-indentation 1)
|
||
(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 outdented appropriately. If a numeric
|
||
argument 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
|
||
(beginning-of-python-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 outdent. This assumes that any lines that
|
||
;; are already outdented relative to py-compute-indentation were
|
||
;; put there on purpose. Its 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 a properly formatted execfile('FILENAME') to the underlying
|
||
;; Python interpreter process 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('%s')\n" filename)))
|
||
(unwind-protect
|
||
(progn
|
||
(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-process-filter (pyproc string)
|
||
(let ((curbuf (current-buffer))
|
||
(pbuf (process-buffer pyproc))
|
||
(pmark (process-mark pyproc))
|
||
file-finished)
|
||
;; make sure we switch to a different buffer at least once. if we
|
||
;; *don't* do this, then if the process buffer is in the selected
|
||
;; window, and point is before the end, and lots of output is
|
||
;; coming at a fast pace, then (a) simple cursor-movement commands
|
||
;; like C-p, C-n, C-f, C-b, C-a, C-e take an incredibly long time
|
||
;; to have a visible effect (the window just doesn't get updated,
|
||
;; sometimes for minutes(!)), and (b) it takes about 5x longer to
|
||
;; get all the process output (until the next python prompt).
|
||
;;
|
||
;; #b makes no sense to me at all. #a almost makes sense: unless
|
||
;; we actually change buffers, set_buffer_internal in buffer.c
|
||
;; doesn't set windows_or_buffers_changed to 1, & that in turn
|
||
;; seems to make the Emacs command loop reluctant to update the
|
||
;; display. Perhaps the default process filter in process.c's
|
||
;; read_process_output has update_mode_lines++ for a similar
|
||
;; reason? beats me ...
|
||
|
||
(unwind-protect
|
||
;; make sure current buffer is restored
|
||
;; BAW - we want to check to see if this still applies
|
||
(progn
|
||
;; mysterious ugly hack
|
||
(if (eq curbuf pbuf)
|
||
(set-buffer (get-buffer-create "*scratch*")))
|
||
|
||
(set-buffer pbuf)
|
||
(let* ((start (point))
|
||
(goback (< start pmark))
|
||
(goend (and (not goback) (= start (point-max))))
|
||
(buffer-read-only nil))
|
||
(goto-char pmark)
|
||
(insert string)
|
||
(move-marker pmark (point))
|
||
(setq file-finished
|
||
(and py-file-queue
|
||
(equal ">>> "
|
||
(buffer-substring
|
||
(prog2 (beginning-of-line) (point)
|
||
(goto-char pmark))
|
||
(point)))))
|
||
(if goback (goto-char start)
|
||
;; else
|
||
(if py-scroll-process-buffer
|
||
(let* ((pop-up-windows t)
|
||
(pwin (display-buffer pbuf)))
|
||
(set-window-point pwin (point)))))
|
||
(set-buffer curbuf)
|
||
(if file-finished
|
||
(progn
|
||
(py-delete-file-silently (car py-file-queue))
|
||
(setq py-file-queue (cdr py-file-queue))
|
||
(if py-file-queue
|
||
(py-execute-file pyproc (car py-file-queue)))))
|
||
(and goend
|
||
(progn (set-buffer pbuf)
|
||
(goto-char (point-max))))
|
||
))
|
||
(set-buffer curbuf))))
|
||
|
||
|
||
;;; Subprocess commands
|
||
|
||
;;;###autoload
|
||
(defun py-shell ()
|
||
"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.
|
||
|
||
See the docs for variable `py-scroll-buffer' for info on scrolling
|
||
behavior in the process window.
|
||
|
||
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."
|
||
;; BAW - should undo be disabled in the python process buffer, if
|
||
;; this bug still exists?
|
||
(interactive)
|
||
(require 'comint)
|
||
(switch-to-buffer-other-window
|
||
(make-comint "Python" py-python-command nil "-i"))
|
||
(make-local-variable 'comint-prompt-regexp)
|
||
(setq comint-prompt-regexp "^>>> \\|^[.][.][.] ")
|
||
(set-process-filter (get-buffer-process (current-buffer)) 'py-process-filter)
|
||
(set-syntax-table py-mode-syntax-table)
|
||
(local-set-key [tab] 'self-insert-command))
|
||
|
||
|
||
(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)))
|
||
|
||
;; only used when (memq 'broken-temp-names py-emacs-features)
|
||
(defvar py-serial-number 0)
|
||
|
||
(defun py-execute-region (start end &optional async)
|
||
"Execute the 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 an
|
||
optional \\[universal-argument] 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 "Python"))
|
||
(temp (if (memq 'broken-temp-names py-emacs-features)
|
||
(prog1
|
||
(format "python-%d" py-serial-number)
|
||
(setq py-serial-number (1+ py-serial-number)))
|
||
(make-temp-name "python")))
|
||
(file (concat (file-name-as-directory py-temp-directory) temp))
|
||
(outbuf "*Python Output*"))
|
||
(write-region start end file nil 'nomsg)
|
||
(cond
|
||
;; always run the code in it's own asynchronous subprocess
|
||
(async
|
||
(let* ((buf (generate-new-buffer-name "*Python Output*")))
|
||
(start-process "Python" buf py-python-command "-u" file)
|
||
(pop-to-buffer buf)
|
||
))
|
||
;; if the Python interpreter shell is running, queue it up for
|
||
;; execution there.
|
||
(proc
|
||
;; use the existing python shell
|
||
(if (not py-file-queue)
|
||
(py-execute-file proc file)
|
||
(message "File %s queued for execution" file))
|
||
(push file py-file-queue))
|
||
(t
|
||
;; otherwise either run it synchronously in a subprocess
|
||
(shell-command-on-region start end py-python-command outbuf)
|
||
))))
|
||
|
||
;; Code execution command
|
||
(defun py-execute-buffer (&optional async)
|
||
"Send the contents of the buffer to a Python interpreter.
|
||
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."
|
||
(interactive "P")
|
||
(py-execute-region (point-min) (point-max) async))
|
||
|
||
|
||
;; Electric deletion
|
||
(defun py-electric-backspace (arg)
|
||
"Deletes 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, deletes 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 numeric arg,
|
||
outdents 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.
|
||
Numeric argument deletes that many preceding characters."
|
||
(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)
|
||
"Deletes 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), then this function behaves identical 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'."
|
||
(interactive "*p")
|
||
(if (and (boundp 'delete-key-deletes-forward)
|
||
delete-key-deletes-forward)
|
||
(funcall py-delete-function arg)
|
||
;; else
|
||
(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], ignore outdenting 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 outdent
|
||
(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)
|
||
;; implements all the rules for indentation computation. when
|
||
;; honor-block-close-p is non-nil, statements such as return, raise,
|
||
;; break, continue, and pass force one level of outdenting.
|
||
(save-excursion
|
||
(let ((pps (parse-partial-sexp (save-excursion
|
||
(beginning-of-python-def-or-class)
|
||
(point))
|
||
(point))))
|
||
(beginning-of-line)
|
||
(cond
|
||
;; are we inside a string or comment?
|
||
((or (nth 3 pps) (nth 4 pps))
|
||
(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 (< (point) startpos)
|
||
;; again mimic the first list item
|
||
(current-indentation)
|
||
;; else they're about to enter the first item
|
||
(goto-char open-bracket-pos)
|
||
(+ (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")))
|
||
(1+ (current-column))))))
|
||
|
||
;; 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 outdented 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 its 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 (done)
|
||
(while (not done)
|
||
(re-search-backward "^[ \t]*\\([^ \t\n#]\\|#[ \t\n]\\)"
|
||
nil 'move)
|
||
(setq done (or (eq py-honor-comment-indentation t)
|
||
(bobp)
|
||
(/= (following-char) ?#)
|
||
(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-initial-line)
|
||
(+ (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 (without a prefix arg), makes a buffer-local copy of
|
||
`py-indent-offset' with the new value. This will not affect any other
|
||
Python buffers. With a prefix arg, changes 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
|
||
(found nil)
|
||
colon-indent)
|
||
(py-goto-initial-line)
|
||
(while (not (or found (eobp)))
|
||
(if (re-search-forward ":[ \t]*\\($\\|[#\\]\\)" nil 'move)
|
||
(progn
|
||
(setq restart (point))
|
||
(py-goto-initial-line)
|
||
(if (py-statement-opens-block-p)
|
||
(setq found t)
|
||
(goto-char restart)))))
|
||
(if found
|
||
()
|
||
(goto-char start)
|
||
(py-goto-initial-line)
|
||
(while (not (or found (bobp)))
|
||
(setq found
|
||
(and
|
||
(re-search-backward ":[ \t]*\\($\\|[#\\]\\)" nil 'move)
|
||
(or (py-goto-initial-line) t) ; always true -- side effect
|
||
(py-statement-opens-block-p)))))
|
||
(setq colon-indent (current-indentation)
|
||
found (and found (zerop (py-next-statement 1)))
|
||
new-value (- (current-indentation) colon-indent))
|
||
(goto-char start)
|
||
(if found
|
||
(progn
|
||
(funcall (if global 'kill-local-variable 'make-local-variable)
|
||
'py-indent-offset)
|
||
(setq py-indent-offset new-value)
|
||
(message "%s value of py-indent-offset set to %d"
|
||
(if global "Global" "Local")
|
||
py-indent-offset))
|
||
(error "Sorry, couldn't guess a value for py-indent-offset"))))
|
||
|
||
(defun py-shift-region (start end count)
|
||
(save-excursion
|
||
(goto-char end) (beginning-of-line) (setq end (point))
|
||
(goto-char start) (beginning-of-line) (setq start (point))
|
||
(indent-rigidly start end count)))
|
||
|
||
(defun py-shift-region-left (start end &optional count)
|
||
"Shift region of Python code to the left.
|
||
The lines from the line containing the start of the current region up
|
||
to (but not including) the line containing the end of the region are
|
||
shifted to the left, by `py-indent-offset' columns.
|
||
|
||
If a prefix argument is given, the region is instead shifted by that
|
||
many columns. With no active region, outdent only the current line.
|
||
You cannot outdent the region if any line is already at column zero."
|
||
(interactive
|
||
(let ((p (point))
|
||
(m (mark))
|
||
(arg current-prefix-arg))
|
||
(if m
|
||
(list (min p m) (max p m) arg)
|
||
(list p (save-excursion (forward-line 1) (point)) arg))))
|
||
;; if any line is at column zero, don't shift the region
|
||
(save-excursion
|
||
(goto-char start)
|
||
(while (< (point) end)
|
||
(back-to-indentation)
|
||
(if (and (zerop (current-column))
|
||
(not (looking-at "\\s *$")))
|
||
(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 previous 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
|
||
first 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-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 beginning-of-python-def-or-class (&optional class)
|
||
"Move point to start of def (or class, with prefix arg).
|
||
|
||
Searches back for the closest preceding `def'. If you supply a prefix
|
||
arg, looks for a `class' instead. The docs assume the `def' case;
|
||
just substitute `class' for `def' for the other case.
|
||
|
||
If point is in a def statement already, and after the `d', simply
|
||
moves point to the start of the statement.
|
||
|
||
Else (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.
|
||
|
||
If you want to mark the current def/class, see
|
||
`\\[py-mark-def-or-class]'."
|
||
(interactive "P") ; raw prefix arg
|
||
(let ((at-or-before-p (<= (current-column) (current-indentation)))
|
||
(start-of-line (progn (beginning-of-line) (point)))
|
||
(start-of-stmt (progn (py-goto-initial-line) (point))))
|
||
(if (or (/= start-of-stmt start-of-line)
|
||
(not at-or-before-p))
|
||
(end-of-line)) ; OK to match on this line
|
||
(re-search-backward (if class "^[ \t]*class\\>" "^[ \t]*def\\>")
|
||
nil 'move)))
|
||
|
||
(defun end-of-python-def-or-class (&optional class)
|
||
"Move point beyond end of def (or class, with prefix arg) body.
|
||
|
||
By default, looks for an appropriate `def'. If you supply a prefix arg,
|
||
looks for a `class' instead. The docs assume the `def' case; just
|
||
substitute `class' for `def' for the other case.
|
||
|
||
If point is in a def statement already, this is the def we use.
|
||
|
||
Else if the def found by `\\[beginning-of-python-def-or-class]'
|
||
contains the statement you started on, that's the def we use.
|
||
|
||
Else 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.
|
||
|
||
If you want to mark the current def/class, see
|
||
`\\[py-mark-def-or-class]'."
|
||
(interactive "P") ; raw prefix arg
|
||
(let ((start (progn (py-goto-initial-line) (point)))
|
||
(which (if class "class" "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 beginning-of-python-def-or-class hits container
|
||
(if (and (beginning-of-python-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 end-of-python-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 `\\[end-of-python-def-or-class]' and
|
||
`\\[beginning-of-python-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 (if class "class" "def")))
|
||
(push-mark start)
|
||
(if (not (py-go-up-tree-to-keyword which))
|
||
(progn (goto-char start)
|
||
(error "Enclosing %s not found" 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))))))))
|
||
|
||
;; ripped from cc-mode
|
||
(defun py-forward-into-nomenclature (&optional arg)
|
||
"Move forward to end of a nomenclature section or word.
|
||
With arg, to it arg 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))
|
||
|
||
|
||
|
||
;; 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-buffer]\tsends the entire buffer to the Python interpreter
|
||
\\[py-execute-region]\tsends the current region
|
||
\\[py-shell]\tstarts a Python interpreter window; this will be used by
|
||
\tsubsequent \\[py-execute-buffer] or \\[py-execute-region] commands
|
||
%c:py-execute-buffer
|
||
%c:py-execute-region
|
||
%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-scroll-process-buffer\talways scroll Python process buffer
|
||
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-scroll-process-buffer
|
||
%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-delete-char]\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-delete-char] 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-delete-char
|
||
|
||
|
||
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
|
||
\\[beginning-of-python-def-or-class]\t move to start of def
|
||
\\[universal-argument] \\[beginning-of-python-def-or-class]\t move to start of class
|
||
\\[end-of-python-def-or-class]\t move to end of def
|
||
\\[universal-argument] \\[end-of-python-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:beginning-of-python-def-or-class
|
||
%c:end-of-python-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]"))
|
||
|
||
;; returns the parse state at point (see parse-partial-sexp docs)
|
||
(defun py-parse-state ()
|
||
(save-excursion
|
||
(let ((here (point))
|
||
pps done ci)
|
||
(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)
|
||
(setq ci (current-indentation))
|
||
(beginning-of-line)
|
||
(save-excursion
|
||
(setq pps (parse-partial-sexp (point) here)))
|
||
;; make sure we don't land inside a triple-quoted string
|
||
(setq done (or (zerop ci)
|
||
(not (nth 3 pps))
|
||
(bobp)))
|
||
)
|
||
pps)))
|
||
|
||
;; if point is at a non-zero nesting level, returns the number of the
|
||
;; character that opens the smallest enclosing unclosed list; else
|
||
;; returns nil.
|
||
(defun py-nesting-level ()
|
||
(let ((status (py-parse-state)) )
|
||
(if (zerop (car status))
|
||
nil ; not in a nest
|
||
(car (cdr status))))) ; char# of open bracket
|
||
|
||
;; t iff preceding line ends with backslash that's not in a comment
|
||
(defun py-backslash-continuation-line-p ()
|
||
(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))))
|
||
|
||
;; t iff current line is a continuation line
|
||
(defun py-continuation-line-p ()
|
||
(save-excursion
|
||
(beginning-of-line)
|
||
(or (py-backslash-continuation-line-p)
|
||
(py-nesting-level))))
|
||
|
||
;; go to initial line of 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.
|
||
(defun py-goto-initial-line ()
|
||
(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))
|
||
|
||
;; go to point right beyond final line of 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.
|
||
(defun py-goto-beyond-final-line ()
|
||
(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))))))
|
||
|
||
;; t iff statement opens a block == iff it ends with a colon that's
|
||
;; not in a comment. point should be at the start of a statement
|
||
(defun py-statement-opens-block-p ()
|
||
(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 ()
|
||
;; true iff the current statement `closes' a block == the line
|
||
;; starts with `return', `raise', `break', `continue', and `pass'.
|
||
;; doesn't catch embedded statements
|
||
(let ((here (point)))
|
||
(back-to-indentation)
|
||
(prog1
|
||
(looking-at (concat py-block-closing-keywords-re "\\>"))
|
||
(goto-char here))))
|
||
|
||
;; go to point right beyond 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 bolp
|
||
(defun py-goto-beyond-block ()
|
||
(if (py-statement-opens-block-p)
|
||
(py-mark-block nil 'just-move)
|
||
(py-goto-beyond-final-line)))
|
||
|
||
;; go to start of first statement (not blank or comment or
|
||
;; continuation line) at or preceding point. returns t if there is
|
||
;; one, else nil
|
||
(defun py-goto-statement-at-or-above ()
|
||
(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))
|
||
|
||
;; go to start of first statement (not blank or comment or
|
||
;; continuation line) following the statement containing point returns
|
||
;; t if there is one, else nil
|
||
(defun py-goto-statement-below ()
|
||
(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)))
|
||
|
||
;; go to start of statement, at or preceding point, starting with
|
||
;; keyword KEY. Skips blank lines and non-indenting comments upward
|
||
;; first. If that statement starts with KEY, done, else go back to
|
||
;; first enclosing block starting with KEY. If successful, leaves
|
||
;; point at the start of the KEY line & returns t. Else leaves point
|
||
;; at an undefined place & returns nil.
|
||
(defun py-go-up-tree-to-keyword (key)
|
||
;; 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))
|
||
|
||
;; return string in buffer from start of indentation to end of line;
|
||
;; prefix "..." if leading whitespace was skipped
|
||
(defun py-suck-up-leading-text ()
|
||
(save-excursion
|
||
(back-to-indentation)
|
||
(concat
|
||
(if (bolp) "" "...")
|
||
(buffer-substring (point) (progn (end-of-line) (point))))))
|
||
|
||
;; assuming point at bolp, return first keyword ([a-z]+) on the line,
|
||
;; as a Lisp symbol; return nil if none
|
||
(defun py-suck-up-first-keyword ()
|
||
(let ((case-fold-search nil))
|
||
(if (looking-at "[ \t]*\\([a-z]+\\)\\b")
|
||
(intern (buffer-substring (match-beginning 1) (match-end 1)))
|
||
nil)))
|
||
|
||
(defun py-delete-file-silently (fname)
|
||
(condition-case nil
|
||
(delete-file fname)
|
||
(error nil)))
|
||
|
||
(defun py-kill-emacs-hook ()
|
||
;; delete our temp files
|
||
(py-safe (while py-file-queue
|
||
(py-delete-file-silently (car py-file-queue))
|
||
(setq py-file-queue (cdr py-file-queue)))))
|
||
|
||
(defun py-current-defun ()
|
||
;; tell 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] 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-scroll-process-buffer
|
||
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))))
|
||
|
||
|
||
;; arrange to kill temp files when Emacs exists
|
||
(add-hook 'kill-emacs-hook 'py-kill-emacs-hook)
|
||
|
||
|
||
|
||
(provide 'python-mode)
|
||
;;; python-mode.el ends here
|