Mercurial > hg > xemacs-beta
annotate man/xemacs/undo.texi @ 4857:34ff4dd7397d
Add ChangeLog entries for previous changes to tests dir
-------------------- ChangeLog entries follow: --------------------
tests/ChangeLog addition:
2010-01-14 Ben Wing <ben@xemacs.org>
* automated/base64-tests.el (bt-base64-encode-string):
* automated/base64-tests.el (bt-base64-decode-string):
* automated/base64-tests.el (for):
* automated/byte-compiler-tests.el:
* automated/byte-compiler-tests.el (before-and-after-compile-equal):
* automated/case-tests.el:
* automated/case-tests.el (downcase-string):
* automated/case-tests.el (insert):
* automated/case-tests.el (featurep):
* automated/case-tests.el (let):
* automated/case-tests.el (boundp):
* automated/ccl-tests.el (ccl-test-normal-expr):
* automated/ccl-tests.el (ccl-test-map-instructions):
* automated/ccl-tests.el (ccl-test-suites):
* automated/database-tests.el (delete-database-files):
* automated/extent-tests.el (let):
* automated/extent-tests.el (insert):
* automated/extent-tests.el (props):
* automated/hash-table-tests.el (test):
* automated/hash-table-tests.el (for):
* automated/hash-table-tests.el (ht):
* automated/hash-table-tests.el (iterations):
* automated/hash-table-tests.el (h1):
* automated/hash-table-tests.el (make-hash-table):
* automated/hash-table-tests.el (sxhash):
* automated/lisp-tests.el:
* automated/lisp-tests.el (setq):
* automated/lisp-tests.el (test-setq):
* automated/lisp-tests.el (my-vector):
* automated/lisp-tests.el (nconc):
* automated/lisp-tests.el (x):
* automated/lisp-tests.el (y):
* automated/lisp-tests.el (butlast):
* automated/lisp-tests.el (+):
* automated/lisp-tests.el (featurep):
* automated/lisp-tests.el (-):
* automated/lisp-tests.el (six):
* automated/lisp-tests.el (three):
* automated/lisp-tests.el (1):
* automated/lisp-tests.el (one):
* automated/lisp-tests.el (two):
* automated/lisp-tests.el (0):
* automated/lisp-tests.el (five):
* automated/lisp-tests.el (logxor):
* automated/lisp-tests.el (test1):
* automated/lisp-tests.el (division-test):
* automated/lisp-tests.el (for):
* automated/lisp-tests.el (check-function-argcounts):
* automated/lisp-tests.el (type-of):
* automated/lisp-tests.el (mapcar):
* automated/lisp-tests.el (z):
* automated/lisp-tests.el (mapvector):
* automated/lisp-tests.el (mapconcat):
* automated/lisp-tests.el ([1 2 3]):
* automated/lisp-tests.el (#*010):
* automated/lisp-tests.el (test-harness-risk-infloops):
* automated/lisp-tests.el (erase-buffer):
* automated/lisp-tests.el (sym):
* automated/lisp-tests.el (subseq):
* automated/lisp-tests.el (length):
* automated/lisp-tests.el (102):
* automated/lisp-tests.el (read):
* automated/lisp-tests.el (new-char):
* automated/lisp-tests.el (new-load-file-name):
* automated/lisp-tests.el (cl-floor):
* automated/lisp-tests.el (foo):
* automated/lisp-tests.el (string-variable):
* automated/md5-tests.el (lambda):
* automated/md5-tests.el (large-string):
* automated/md5-tests.el (mapcar):
* automated/md5-tests.el (insert):
* automated/mule-tests.el (test-chars):
* automated/mule-tests.el (existing-file-name):
* automated/mule-tests.el (featurep):
* automated/query-coding-tests.el (featurep):
* automated/regexp-tests.el:
* automated/regexp-tests.el (insert):
* automated/regexp-tests.el (Assert):
* automated/regexp-tests.el (string-match):
* automated/regexp-tests.el (featurep):
* automated/regexp-tests.el (text):
* automated/regexp-tests.el (text1):
* automated/regexp-tests.el ("aáa"):
* automated/symbol-tests.el:
* automated/symbol-tests.el (name):
* automated/symbol-tests.el (check-weak-list-unique):
* automated/symbol-tests.el (string):
* automated/symbol-tests.el (list):
* automated/symbol-tests.el (foo):
* automated/symbol-tests.el (read):
* automated/symbol-tests.el (eval):
* automated/symbol-tests.el (fresh-keyword-name):
* automated/symbol-tests.el (set):
* automated/symbol-tests.el (print-gensym):
* automated/symbol-tests.el (mysym):
* automated/syntax-tests.el (test-forward-word):
* automated/syntax-tests.el (test-backward-word):
* automated/syntax-tests.el (test-syntax-table):
* automated/syntax-tests.el (with-syntax-table):
* automated/syntax-tests.el (Skip-Test-Unless):
* automated/syntax-tests.el (with):
* automated/tag-tests.el (testfile):
* automated/test-harness.el:
* automated/test-harness.el (test-harness-from-buffer):
* automated/weak-tests.el (w):
* automated/weak-tests.el (p):
* automated/weak-tests.el (a):
Create Assert-eq, Assert-equal, etc. These are equivalent to
(Assert (eq ...)) etc. but display both the actual value and the
expected value of the comparison. Use them throughout the test
suite.
* automated/test-harness.el (Assert):
Clean up code and doc string of macro Assert.
| author | Ben Wing <ben@xemacs.org> |
|---|---|
| date | Thu, 14 Jan 2010 02:34:47 -0600 |
| parents | 376386a54a3c |
| children |
| rev | line source |
|---|---|
| 0 | 1 |
| 2 @node Undo, Minibuffer, Basic, Top | |
| 3 @chapter Undoing Changes | |
| 4 @cindex undo | |
| 5 @cindex mistakes, correcting | |
| 6 | |
| 7 Emacs allows you to undo all changes you make to the text of a buffer, | |
| 8 up to a certain amount of change (8000 characters). Each buffer records | |
| 9 changes individually, and the undo command always applies to the | |
| 10 current buffer. Usually each editing command makes a separate entry | |
| 11 in the undo records, but some commands such as @code{query-replace} | |
| 12 make many entries, and very simple commands such as self-inserting | |
| 13 characters are often grouped to make undoing less tedious. | |
| 14 | |
| 15 @table @kbd | |
| 16 @item C-x u | |
| 17 Undo one batch of changes (usually, one command's worth) (@code{undo}). | |
| 18 @item C-_ | |
| 19 The same. | |
| 20 @end table | |
| 21 | |
| 22 @kindex C-x u | |
| 23 @kindex C-_ | |
| 24 @findex undo | |
| 25 The command @kbd{C-x u} or @kbd{C-_} allows you to undo changes. The | |
| 26 first time you give this command, it undoes the last change. Point | |
| 27 moves to the text affected by the undo, so you can see what was undone. | |
| 28 | |
| 29 Consecutive repetitions of the @kbd{C-_} or @kbd{C-x u} commands undo | |
| 30 earlier and earlier changes, back to the limit of what has been | |
| 31 recorded. If all recorded changes have already been undone, the undo | |
| 32 command prints an error message and does nothing. | |
| 33 | |
| 34 Any command other than an undo command breaks the sequence of undo | |
| 35 commands. Starting at this moment, the previous undo commands are | |
| 36 considered ordinary changes that can themselves be undone. Thus, you can | |
| 37 redo changes you have undone by typing @kbd{C-f} or any other command | |
| 38 that have no important effect, and then using more undo commands. | |
| 39 | |
| 40 If you notice that a buffer has been modified accidentally, the | |
| 41 easiest way to recover is to type @kbd{C-_} repeatedly until the stars | |
| 42 disappear from the front of the mode line. When that happens, all the | |
| 43 modifications you made have been canceled. If you do not remember | |
| 44 whether you changed the buffer deliberately, type @kbd{C-_} once. When | |
| 45 you see Emacs undo the last change you made, you probably remember why you | |
| 46 made it. If the change was an accident, leave it undone. If it was | |
| 47 deliberate, redo the change as described in the preceding paragraph. | |
| 48 | |
| 49 Whenever an undo command makes the stars disappear from the mode line, | |
| 50 the buffer contents is the same as it was when the file was last read in | |
| 51 or saved. | |
| 52 | |
| 53 Not all buffers record undo information. Buffers whose names start with | |
| 54 spaces don't; these buffers are used internally by Emacs and its extensions | |
| 55 to hold text that users don't normally look at or edit. Minibuffers, | |
| 56 help buffers, and documentation buffers also don't record undo information. | |
| 57 | |
| 58 Emacs can remember at most 8000 or so characters of deleted or | |
| 59 modified text in any one buffer for reinsertion by the undo command. | |
| 60 There is also a limit on the number of individual insert, delete, or | |
| 61 change actions that Emacs can remember. | |
| 62 | |
| 63 There are two keys to run the @code{undo} command, @kbd{C-x u} and | |
| 64 @kbd{C-_}, because on some keyboards, it is not obvious how to type | |
| 65 @kbd{C-_}. @kbd{C-x u} is an alternative you can type in the same | |
| 66 fashion on any terminal. |