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authorAlexander Sulfrian <alexander@sulfrian.net>2009-11-19 01:44:52 +0100
committerAlexander Sulfrian <alexander@sulfrian.net>2009-11-19 01:44:52 +0100
commit07963cfc7b5bd985bf01ef22c90970501104352d (patch)
tree8166a4c5ff56dfb5a2c8860cd34cb2c04d601fd3 /emacs.d/lisp/rudel/.svn/text-base/rudel-compat.el.svn-base
parent91d3e89c924fb8a932599ccfcf18bc364878ac17 (diff)
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added rudel (obby and other colab framework for emacs)
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+;;; rudel-compat.el --- Compatibility code for Rudel
+;;
+;; Copyright (C) 2009 Jan Moringen
+;; Copyright (C) 2009 Phil Hagelberg
+;;
+;; Author: Jan Moringen <scymtym@users.sourceforge.net>
+;; Phil Hagelberg <phil@enigma>
+;; Keywords: rudel, compatibility
+;; X-RCS: $Id:$
+;;
+;; This file is part of Rudel.
+;;
+;; Rudel is free software: you can redistribute it and/or modify it
+;; under the terms of the GNU General Public License as published by
+;; the Free Software Foundation, either version 3 of the License, or
+;; (at your option) any later version.
+;;
+;; Rudel is distributed in the hope that it will be useful, but
+;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+;; General Public License for more details.
+;;
+;; You should have received a copy of the GNU General Public License
+;; along with Rudel. If not, see <http://www.gnu.org/licenses>.
+
+
+;;; Commentary:
+;;
+;; This file contains compatibility code required to make Rudel work
+;; with different versions of Emacs.
+
+
+;;; History:
+;;
+;; 0.1 - Initial revision
+
+
+;;; Code:
+;;
+
+(unless (fboundp 'read-color)
+ (defun read-color (prompt &rest ignored)
+ "Poor man's read color without completion.
+You have to take care to only enter valid color names."
+ (read-string prompt)))
+
+
+;;; Spinner Progress Reporter
+;;
+
+(unless (functionp 'progress-reporter-spin)
+ (defvar progress-spinner-values ["-" "\\" "|" "/"])
+
+ (defsubst progress-reporter-update (reporter &optional value)
+ "Report progress of an operation in the echo area.
+
+The first parameter, REPORTER, should be the result of a call to
+`make-progress-reporter'. For reporters for which the max value
+is known, the second argument determines the actual progress of
+operation; it must be between MIN-VALUE and MAX-VALUE as passed
+to `make-progress-reporter'.
+
+However, if the change since last echo area update is too small
+or not enough time has passed, then do nothing (see
+`make-progress-reporter' for details).
+
+In this case, this function is very inexpensive, you need not
+care how often you call it."
+ (if (progress-reporter-spinner-p reporter)
+ (progress-reporter-spin reporter)
+ (when (>= value (car reporter))
+ (progress-reporter-do-update reporter value))))
+
+ (defun make-progress-reporter (message &optional min-value max-value
+ current-value min-change min-time)
+ "Return progress reporter object to be used with `progress-reporter-update'.
+
+MESSAGE is shown in the echo area. When at least 1% of operation
+is complete, the exact percentage will be appended to the
+MESSAGE. When you call `progress-reporter-done', word \"done\"
+is printed after the MESSAGE. You can change MESSAGE of an
+existing progress reporter with `progress-reporter-force-update'.
+
+If provided, MIN-VALUE and MAX-VALUE designate starting (0%
+complete) and final (100% complete) states of operation. The
+latter should be larger; if this is not the case, then simply
+negate all values. Optional CURRENT-VALUE specifies the progress
+by the moment you call this function. You should omit it or set
+it to nil in most cases since it defaults to MIN-VALUE.
+
+Optional MIN-CHANGE determines the minimal change in percents to
+report (default is 1%.) Optional MIN-TIME specifies the minimal
+time before echo area updates (default is 0.2 seconds.) If
+`float-time' function is not present, then time is not tracked
+at all. If OS is not capable of measuring fractions of seconds,
+then this parameter is effectively rounded up.
+
+If MIN-VALUE and MAX-VALUE are unknown, they may be omitted to
+return a \"pulsing\" progress reporter."
+ (unless min-time
+ (setq min-time 0.2))
+ (let ((reporter
+ (cons min-value ;; Force a call to `message' now
+ (vector (if (and (fboundp 'float-time)
+ (>= min-time 0.02))
+ (float-time) nil)
+ (or min-value 0)
+ max-value
+ message
+ (if min-change (max (min min-change 50) 1) 1)
+ min-time))))
+ (progress-reporter-update reporter (or current-value min-value))
+ reporter))
+
+ (defun progress-reporter-force-update (reporter &optional value new-message)
+ "Report progress of an operation in the echo area unconditionally.
+
+First two parameters are the same as for
+`progress-reporter-update'. Optional NEW-MESSAGE allows you to
+change the displayed message."
+ (let ((parameters (cdr reporter)))
+ (when new-message
+ (aset parameters 3 new-message))
+ (when (aref parameters 0)
+ (aset parameters 0 (float-time)))
+ (if (progress-reporter-spinner-p reporter)
+ (progress-reporter-spin reporter)
+ (progress-reporter-do-update reporter value))))
+
+ (defun progress-reporter-spinner-p (reporter)
+ "Return t if REPORTER has an unknown max value."
+ (null (aref (cdr reporter) 2)))
+
+ (defun progress-reporter-spin (reporter)
+ "Advance indicator of spinning REPORTER."
+ (let* ((parameters (cdr reporter))
+ (index (+ (aref parameters 1) 1)))
+ (aset parameters 1 index)
+ (let ((message-log-max nil)) ; No logging
+ (message "%s %s"
+ (aref progress-spinner-values (mod index 4))
+ (aref parameters 3))))))
+
+(unless (functionp 'string-match-p)
+ (defsubst string-match-p (regexp string &optional start)
+ "Same as `string-match' except this function does not change the match data"
+ (let ((inhibit-changing-match-data t))
+ (string-match regexp string start))))
+
+(defun rudel-get-coding-system (name)
+ (if (functionp 'coding-system-from-name)
+ (coding-system-from-name name)
+ ;; May need to try a little harder here for Emacs 22 depending on
+ ;; what kind of encoding names are given us.
+ (intern name)))
+
+(provide 'rudel-compat)
+;;; rudel-compat.el ends here