From 3c8c279cc1bbf28fdac7db14dc9e100d576a86cd Mon Sep 17 00:00:00 2001 From: "Richard M. Stallman" Date: Sun, 4 Jun 2006 02:17:49 +0000 Subject: [PATCH] Lots of cleanups. --- man/ChangeLog | 4 + man/mini.texi | 608 ++++++++++++++++++++++++-------------------------- 2 files changed, 292 insertions(+), 320 deletions(-) diff --git a/man/ChangeLog b/man/ChangeLog index e4280d404d..85c89fbe4d 100644 --- a/man/ChangeLog +++ b/man/ChangeLog @@ -1,3 +1,7 @@ +2006-06-03 Ted Zlatanov + + * mini.texi: Lots of cleanups. + 2006-06-01 Luc Teirlinck * misc.texi (Shell History Copying): Update descriptions of `C-c RET' diff --git a/man/mini.texi b/man/mini.texi index 4c3748a78f..e0a851cfc9 100644 --- a/man/mini.texi +++ b/man/mini.texi @@ -6,55 +6,53 @@ @chapter The Minibuffer @cindex minibuffer - The @dfn{minibuffer} is the facility used by Emacs commands to read -arguments more complicated than a single number. Minibuffer arguments -can be file names, buffer names, Lisp function names, Emacs command -names, Lisp expressions, and many other things, depending on the command -reading the argument. You can use the usual Emacs editing commands in -the minibuffer to edit the argument text. + The @dfn{minibuffer} is where Emacs commands read complicated +arguments (anything more a single number). We call it the +``minibuffer'' because it's a special-purpose buffer with a small +amount of screen space. Minibuffer arguments can be file names, +buffer names, Lisp function names, Emacs command names, Lisp +expressions, and many other things---whatever the command wants to +read. You can use the usual Emacs editing commands in the minibuffer +to edit the argument text. @cindex prompt - When the minibuffer is in use, it appears in the echo area, and the -terminal's cursor moves there. The beginning of the minibuffer line -displays a @dfn{prompt} in a special color, to say what kind of input -you should supply and how it will be used. Often this prompt is -derived from the name of the command that the argument is for. The -prompt normally ends with a colon. + When the minibuffer is in use, it appears in the echo area, with a +cursor. The minibuffer display starts with a @dfn{prompt} in a +distinct color; it says what kind of input is expected and how it will +be used. Often the prompt is derived from the name of the command +that is reading the argument. The prompt normally ends with a colon. @cindex default argument - Sometimes a @dfn{default argument} appears in parentheses before the -colon; it too is part of the prompt. The default will be used as the -argument value if you enter an empty argument (that is, just type -@key{RET}). For example, commands that read buffer names always show a -default, which is the name of the buffer that will be used if you type -just @key{RET}. - - The simplest way to enter a minibuffer argument is to type the text -you want, terminated by @key{RET} which exits the minibuffer. You can -cancel the command that wants the argument, and get out of the -minibuffer, by typing @kbd{C-g}. - - Since the minibuffer uses the screen space of the echo area, it can -conflict with other ways Emacs customarily uses the echo area. Here is how -Emacs handles such conflicts: + Sometimes a @dfn{default argument} appears in the prompt, inside +parentheses before the colon. The default will be used as the +argument value if you just type @key{RET}. For example, commands that +read buffer names show a buffer name as the default. You can type +@key{RET} to operate on that default buffer. + + The simplest way to enter a minibuffer argument is to type the text, +then @key{RET} to exit the minibuffer. You can cancel the minibuffer, +and the command that wants the argument, by typing @kbd{C-g}. + + Since the minibuffer appears in the echo area, it can conflict with +other uses of the echo area. Here is how Emacs handles such +conflicts: @itemize @bullet @item -If a command gets an error while you are in the minibuffer, this does -not cancel the minibuffer. However, the echo area is needed for the -error message and therefore the minibuffer itself is hidden for a -while. It comes back after a few seconds, or as soon as you type -anything. +An error occurs while the minibuffer is active. + +The error message hides the minibuffer for a few seconds, or until you +type something. Then the minibuffer comes back. @item -If in the minibuffer you use a command whose purpose is to display a -message in the echo area, such as @kbd{C-x =}, the message hides the -minibuffer for a while. The minibuffer contents come back after a few -seconds, or as soon as you type anything. +A command such as @kbd{C-x =} needs to display a message in the echo +area. + +The message hides the minibuffer for a few seconds, or until you type +something. Then the minibuffer comes back. @item -Echoing of keystrokes does not take place while the minibuffer is in -use. +Keystrokes don't echo while the minibuffer is in use. @end itemize @menu @@ -68,34 +66,32 @@ use. @node Minibuffer File @section Minibuffers for File Names - Sometimes the minibuffer starts out with text in it. For example, when -you are supposed to give a file name, the minibuffer starts out containing -the @dfn{default directory}, which ends with a slash. This is to inform -you which directory the file will be found in if you do not specify a -directory. + When you use the minibuffer to enter a file name, it starts out with +some initial text---the @dfn{default directory}, ending in a slash. +The file you specify will be in this directory unless you alter or +replace it. @c Separate paragraph to clean up ugly page break--rms @need 1500 - For example, the minibuffer might start out with these contents: + For example, if the minibuffer starts out with these contents: @example Find File: /u2/emacs/src/ @end example @noindent -where @samp{Find File:@: } is the prompt. Typing @kbd{buffer.c} as -input specifies the file @file{/u2/emacs/src/buffer.c}. To find files -in nearby directories, use @kbd{..}; thus, if you type -@kbd{../lisp/simple.el}, you will get the file named -@file{/u2/emacs/lisp/simple.el}. Alternatively, you can kill with -@kbd{M-@key{DEL}} the directory names you don't want (@pxref{Words}). - - If you don't want any of the default, you can kill it with @kbd{C-a -C-k}. But you don't need to kill the default; you can simply ignore it. -Insert an absolute file name, one starting with a slash or a tilde, -after the default directory. For example, to specify the file -@file{/etc/termcap}, just insert that name, giving these minibuffer -contents: +(where @samp{Find File:@: } is the prompt), and you type +@kbd{buffer.c} as input, that specifies the file +@file{/u2/emacs/src/buffer.c}. You can specify the parent directory +by adding @file{..}; thus, if you type @kbd{../lisp/simple.el}, you +will get @file{/u2/emacs/lisp/simple.el}. Alternatively, you can use +@kbd{M-@key{DEL}} to kill the directory names you don't want +(@pxref{Words}). + + You can kill it the entire default with @kbd{C-a C-k}, but there's +no need. You can simply ignore it and give an absolute file name +starting with a slash or a tilde after the default directory. For +example, to specify @file{/etc/termcap}, just type that name: @example Find File: /u2/emacs/src//etc/termcap @@ -106,59 +102,55 @@ Find File: /u2/emacs/src//etc/termcap @cindex double slash in file name @cindex slashes repeated in file name @findex file-name-shadow-mode -GNU Emacs gives a special meaning to a double slash (which is not -normally a useful thing to write): it means, ``ignore everything -before the second slash in the pair.'' Thus, @samp{/u2/emacs/src/} is -ignored in the example above, and you get the file -@file{/etc/termcap}. The ignored part of the file name is dimmed if -the terminal allows it; to disable this, turn off -@code{file-name-shadow-mode} minor mode. - - If you set @code{insert-default-directory} to @code{nil}, the +GNU Emacs interprets a double slash (which is not normally useful in +file names) as, ``ignore everything before the second slash in the +pair.'' In the example above. @samp{/u2/emacs/src/} is ignored, so +you get @file{/etc/termcap}. The ignored part of the file name is +dimmed if the terminal allows it; to disable this dimming, turn off +File Name Shadow mode (a minor mode) with the command +@kbd{M-x file-name-shadow-mode}. + + If the variable @code{insert-default-directory} is @code{nil}, the default directory is never inserted in the minibuffer---so the -minibuffer starts out empty. But the name you type, if relative, is -still interpreted with respect to the same default directory. +minibuffer starts out empty. Nonetheless, relative file name +arguments are still interpreted based on the same default directory. @node Minibuffer Edit @section Editing in the Minibuffer - The minibuffer is an Emacs buffer (albeit a peculiar one), and the usual -Emacs commands are available for editing the text of an argument you are -entering. + The minibuffer is an Emacs buffer (albeit a peculiar one), and the +usual Emacs commands are available for editing the argument text. Since @key{RET} in the minibuffer is defined to exit the minibuffer, you can't use it to insert a newline in the minibuffer. To do that, type @kbd{C-o} or @kbd{C-q C-j}. (The newline character is really the @acronym{ASCII} character control-J.) - The minibuffer has its own window, which normally has space on the -Emacs frame at all times, but it only acts like an Emacs window when -the minibuffer is really in use. At those times, its window is much -like any other Emacs window; you can switch from the minibuffer window -to another window with @kbd{C-x o}, and edit text in other windows, -before returning to the minibuffer to submit the argument. You can -kill text in another window, return to the minibuffer window, and then -yank the text to use it in the argument. @xref{Windows}. + The minibuffer has its own window, which normally has space in the +frame at all times, but it only acts like an Emacs window when the +minibuffer is active. When active, this window is much like any other +Emacs window; for instance, you can switch to another window (with +@kbd{C-x o}), edit text there, then return to the minibuffer window to +finish the argument. You can even kill text in another window, return +to the minibuffer window, and then yank the text into the argument. +@xref{Windows}. @cindex height of minibuffer @cindex size of minibuffer @cindex growing minibuffer @cindex resizing minibuffer - There are some restrictions on the use of the minibuffer window, -however. You cannot switch buffers in it---the minibuffer and its -window are permanently attached. Also, you cannot split or kill the -minibuffer window. But you can make it taller in the normal fashion -with @kbd{C-x ^}. + There are some restrictions on the minibuffer window, however: you +cannot kill it, or split it, or switch buffers in it---the minibuffer +and its window are permanently attached. @vindex resize-mini-windows The minibuffer window expands vertically as necessary to hold the text that you put in the minibuffer. If @code{resize-mini-windows} is -@code{t} (the default), the window is always resized to fit the size -of the text it displays. If its value is the symbol @code{grow-only}, -the window grows when the size of displayed text increases, but -shrinks (back to the normal size) only when the minibuffer becomes -inactive. If its value is @code{nil}, you have to adjust the height -yourself. +@code{t} (the default), the window always resizes as needed by its +contents. If its value is the symbol @code{grow-only}, the window +grows automatically as needed, but shrinks (back to the normal size) +only when the minibuffer becomes inactive. If its value is +@code{nil}, you have to adjust the height yourself. @vindex max-mini-window-height The variable @code{max-mini-window-height} controls the maximum @@ -167,52 +159,47 @@ specifies a fraction of the frame's height; an integer specifies the maximum number of lines; @code{nil} means do not resize the minibuffer window automatically. The default value is 0.25. - If, while in the minibuffer, you issue a command that displays help -text of any sort in another window, you can use the @kbd{C-M-v} -command while in the minibuffer to scroll the help text. -(@kbd{M-@key{PAGEUP}} and @kbd{M-@key{PAGEDOWN}} also operate on that -help text.) This lasts until you exit the minibuffer. This feature -is especially useful when you display a buffer listing possible + The @kbd{C-M-v} command in the minibuffer scrolls the help text from +commands that display help text of any sort in another window. +@kbd{M-@key{PAGEUP}} and @kbd{M-@key{PAGEDOWN}} also operate on that +help text. This is especially useful with long lists of possible completions. @xref{Other Window}. @vindex enable-recursive-minibuffers Emacs normally disallows most commands that use the minibuffer while -the minibuffer is active. This rule is to prevent recursive minibuffers -from confusing novice users. If you want to be able to use such -commands in the minibuffer, set the variable -@code{enable-recursive-minibuffers} to a non-@code{nil} value. +the minibuffer is active. (Entering the minibuffer from the +minibuffer can be confusing.) To allow such commands in the +minibuffer, set the variable @code{enable-recursive-minibuffers} to +@code{t}. @node Completion @section Completion @cindex completion - - For certain kinds of arguments, you can use @dfn{completion} to enter -the argument value. Completion means that you type part of the -argument, then Emacs visibly fills in the rest, or as much as -can be determined from the part you have typed. - - When completion is available, certain keys---@key{TAB}, @key{RET}, and -@key{SPC}---are rebound to complete the text in the minibuffer before point -into a longer string that it stands for, by matching it against a set of -@dfn{completion alternatives} provided by the command reading the -argument. @kbd{?} is defined to display a list of possible completions -of what you have inserted. - - For example, when @kbd{M-x} uses the minibuffer to read the name of -a command, it provides a list of all available Emacs command names to -complete against. The completion keys match the minibuffer text -against all the command names, find any additional name characters -implied by the ones already present in the minibuffer, and add those -characters to the ones you have given. This is what makes it possible -to type @kbd{M-x ins @key{SPC} b @key{RET}} instead of @kbd{M-x -insert-buffer @key{RET}} (for example). (@key{SPC} does not do -completion in reading file names, because it is common to use spaces -in file names on some systems.) - - Case is normally significant in completion, because it is significant -in most of the names that you can complete (buffer names, file names and -command names). Thus, @samp{fo} does not complete to @samp{Foo}. -Completion does ignore case distinctions for certain arguments in which + + Some arguments allow @dfn{completion} to enter their value. This +means that after you type part of the argument, Emacs can fill in the +rest, or some of it, based on what you have typed so far. + + When completion is available, certain keys---@key{TAB}, @key{RET}, +and @key{SPC}---are rebound to complete the text in the minibuffer +before point into a longer string chosen from a set of @dfn{completion +alternatives} provided by the command that requested the argument. +(@key{SPC} does not do completion in reading file names, because it is +common to use spaces in file names on some systems.) @kbd{?} displays +a list of the possible completions at any time. + + For example, @kbd{M-x} uses the minibuffer to read the name of a +command, so it provides a list of all Emacs command names for +completion candidates. The completion keys match the minibuffer text +against these candidates, find any additional name characters implied +by the the text already present in the minibuffer, and add those +characters. This makes it possible to type @kbd{M-x ins @key{SPC} b +@key{RET}} instead of @kbd{M-x insert-buffer @key{RET}}, for example. + + Case is significant in completion when it is significant in the +argument you are entering (buffer names, file names, command names, +for instance). Thus, @samp{fo} does not complete to @samp{Foo}. +Completion ignores case distinctions for certain arguments in which case does not matter. Completion acts only on the text before point. If there is text in @@ -230,42 +217,39 @@ typing some text into the minibuffer---it remains unchanged. @subsection Completion Example @kindex TAB @r{(completion)} -@findex minibuffer-complete - A concrete example may help here. If you type @kbd{M-x au @key{TAB}}, -the @key{TAB} looks for alternatives (in this case, command names) that -start with @samp{au}. There are several, including -@code{auto-fill-mode} and @code{auto-save-mode}---but they are all the -same as far as @code{auto-}, so the @samp{au} in the minibuffer changes -to @samp{auto-}.@refill - - If you type @key{TAB} again immediately, there are multiple -possibilities for the very next character---it could be any of -@samp{cfilrs}---so no more characters are added; instead, @key{TAB} -displays a list of all possible completions in another window. - - If you go on to type @kbd{f @key{TAB}}, this @key{TAB} sees -@samp{auto-f}. The only command name starting this way is -@code{auto-fill-mode}, so completion fills in the rest of that. You now -have @samp{auto-fill-mode} in the minibuffer after typing just @kbd{au -@key{TAB} f @key{TAB}}. Note that @key{TAB} has this effect because in -the minibuffer it is bound to the command @code{minibuffer-complete} -when completion is available. + A concrete example may help here. If you type @kbd{M-x au +@key{TAB}}, the @key{TAB} looks for alternatives (in this case, +command names) that start with @samp{au}. There are several, +including @code{auto-fill-mode} and @code{auto-save-mode}, but they +all begin with @code{auto-}, so the @samp{au} in the minibuffer +completes to @samp{auto-}. + + If you type @key{TAB} again immediately, it cannot determine the +next character; it could be any of @samp{cfilrs}. So it does not add +any characters; instead, @key{TAB} displays a list of all possible +completions in another window. + + Now type @kbd{f @key{TAB}}. This @key{TAB} sees @samp{auto-f}. The +only command name starting with that is @code{auto-fill-mode}, so +completion fills in the rest of that. You have been able to enter +@samp{auto-fill-mode} by typing just @kbd{au @key{TAB} f @key{TAB}}. @node Completion Commands @subsection Completion Commands Here is a list of the completion commands defined in the minibuffer -when completion is available. +when completion is allowed. @table @kbd @item @key{TAB} +@findex minibuffer-complete Complete the text before point in the minibuffer as much as possible (@code{minibuffer-complete}). @item @key{SPC} -Complete the minibuffer text before point, but don't go beyond one -word (@code{minibuffer-complete-word}). @key{SPC} for completion is -not available when entering a file name, since some users often put -spaces in filenames. +Complete up to one word from the minibuffer text before point +(@code{minibuffer-complete-word}). @key{SPC} for completion is not +available when entering a file name, since file names often include +spaces. @item @key{RET} Submit the text in the minibuffer as the argument, possibly completing first as described @@ -277,31 +261,30 @@ in the next node (@code{minibuffer-complete-and-exit}). @xref{Strict Completion}. @end ifnottex @item ? -Display a list of all possible completions of the text in the minibuffer +Display a list of possible completions of the text before point (@code{minibuffer-completion-help}). @end table @kindex SPC @findex minibuffer-complete-word - @key{SPC} completes much like @key{TAB}, but never goes beyond the -next hyphen or space. If you have @samp{auto-f} in the minibuffer and -type @key{SPC}, it finds that the completion is @samp{auto-fill-mode}, -but it stops completing after @samp{fill-}. This gives -@samp{auto-fill-}. Another @key{SPC} at this point completes all the -way to @samp{auto-fill-mode}. The command that implements this -behavior is called @code{minibuffer-complete-word}. + @key{SPC} completes like @key{TAB}, but only up to the next hyphen +or space. If you have @samp{auto-f} in the minibuffer and type +@key{SPC}, it finds that the completion is @samp{auto-fill-mode}, but +it only inserts @samp{ill-}, giving @samp{auto-fill-}. Another +@key{SPC} at this point completes all the way to +@samp{auto-fill-mode}. The command that implements this behavior is +called @code{minibuffer-complete-word}. - Here are some commands you can use to choose a completion from a -window that displays a list of completions: + When you display a list of possible completions, you can choose +one from it: @table @kbd @findex mouse-choose-completion @item Mouse-1 @itemx Mouse-2 -Clicking mouse button 1 or 2 on a completion in the list of possible -completions chooses that completion (@code{mouse-choose-completion}). -You normally use this command while point is in the minibuffer, but you -must click in the list of completions, not in the minibuffer itself. +Clicking mouse button 1 or 2 on a completion possibility chooses that +completion (@code{mouse-choose-completion}). You must click in the +list of completions, not in the minibuffer. @findex switch-to-completions @item @key{PRIOR} @@ -309,98 +292,91 @@ must click in the list of completions, not in the minibuffer itself. Typing @key{PRIOR} or @key{PAGE-UP}, or @kbd{M-v}, while in the minibuffer, selects the window showing the completion list buffer (@code{switch-to-completions}). This paves the way for using the -commands below. (Selecting that window in the usual ways has the same -effect, but this way is more convenient.) +commands below. (Selecting that window in other ways has the same +effect.) @findex choose-completion @item @key{RET} Typing @key{RET} @emph{in the completion list buffer} chooses the completion that point is in or next to (@code{choose-completion}). To -use this command, you must first switch windows to the window that shows -the list of completions. +use this command, you must first switch to the completion list window. @findex next-completion @item @key{RIGHT} Typing the right-arrow key @key{RIGHT} @emph{in the completion list -buffer} moves point to the following completion (@code{next-completion}). +buffer} moves point to the following completion possibility +(@code{next-completion}). @findex previous-completion @item @key{LEFT} Typing the left-arrow key @key{LEFT} @emph{in the completion list -buffer} moves point toward the beginning of the buffer, to the previous -completion (@code{previous-completion}). +buffer} moves point to the previous completion possibility +(@code{previous-completion}). @end table @node Strict Completion @subsection Strict Completion - There are three different ways that @key{RET} can work in completing -minibuffers, depending on how the argument will be used. + There are three different ways that @key{RET} can do completion, +depending on how the argument will be used. @itemize @bullet @item -@dfn{Strict} completion is used when it is meaningless to give any -argument except one of the known alternatives. For example, when -@kbd{C-x k} reads the name of a buffer to kill, it is meaningless to -give anything but the name of an existing buffer. In strict -completion, @key{RET} refuses to exit if the text in the minibuffer -does not complete to an exact match. +@dfn{Strict} completion accepts only known completion candidates. For +example, when @kbd{C-x k} reads the name of a buffer to kill, only the +name of an existing buffer makes sense. In strict completion, +@key{RET} refuses to exit if the text in the minibuffer does not +complete to an exact match. @item @dfn{Cautious} completion is similar to strict completion, except that -@key{RET} exits only if the text was an exact match already, not -needing completion. If the text is not an exact match, @key{RET} does -not exit, but it does complete the text. If it completes to an exact -match, a second @key{RET} will exit. +@key{RET} exits only if the text is an already exact match. +Otherwise, @key{RET} does not exit, but it does complete the text. If +that completes to an exact match, a second @key{RET} will exit. Cautious completion is used for reading file names for files that must -already exist. +already exist, for example. @item -@dfn{Permissive} completion is used when any string whatever is -meaningful, and the list of completion alternatives is just a guide. -For example, when @kbd{C-x C-f} reads the name of a file to visit, any -file name is allowed, in case you want to create a file. In -permissive completion, @key{RET} takes the text in the minibuffer -exactly as given, without completing it. +@dfn{Permissive} completion allows any input; the completion +candidates are just suggestions. For example, when @kbd{C-x C-f} +reads the name of a file to visit, any file name is allowed, including +nonexistent file (in case you want to create a file). In permissive +completion, @key{RET} does not complete, it just submits the argument +as you have entered it. @end itemize - The completion commands display a list of all possible completions in -a window whenever there is more than one possibility for the very next -character. Also, typing @kbd{?} explicitly requests such a list. If -the list of completions is long, you can scroll it with @kbd{C-M-v} -(@pxref{Other Window}). + The completion commands display a list of all possible completions +whenever they can't determine even one more character by completion. +Also, typing @kbd{?} explicitly requests such a list. You can scroll +the list with @kbd{C-M-v} (@pxref{Other Window}). @node Completion Options @subsection Completion Options @vindex completion-ignored-extensions @cindex ignored file names, in completion - When completion is done on file names, certain file names are usually -ignored. The variable @code{completion-ignored-extensions} contains a -list of strings; a file whose name ends in any of those strings is -ignored as a possible completion. The standard value of this variable -has several elements including @code{".o"}, @code{".elc"}, @code{".dvi"} -and @code{"~"}. The effect is that, for example, @samp{foo} can -complete to @samp{foo.c} even though @samp{foo.o} exists as well. -However, if @emph{all} the possible completions end in ``ignored'' -strings, then they are not ignored. Ignored extensions do not apply to -lists of completions---those always mention all possible completions. - - If an element of the list in @code{completion-ignored-extensions} ends -in a slash @file{/}, it indicates a subdirectory that should be ignored -when completing file names. Elements of + When completing file names, certain file names are usually ignored. +The variable @code{completion-ignored-extensions} contains a list of +strings; a file name ending in any of those strings is ignored as a +completion candidate. The standard value of this variable has several +elements including @code{".o"}, @code{".elc"}, @code{".dvi"} and +@code{"~"}. The effect is that, for example, @samp{foo} can complete +to @samp{foo.c} even though @samp{foo.o} exists as well. However, if +@emph{all} the possible completions end in ``ignored'' strings, then +they are not ignored. Displaying a list of possible completions +disregards @code{completion-ignored-extensions}; it shows them all. + + If an element of @code{completion-ignored-extensions} ends in a +slash (@file{/}), it's a subdirectory name; then that directory and +its contents are ignored. Elements of @code{completion-ignored-extensions} which do not end in a slash are -never considered when a completion candidate is a directory; thus, -completion returns directories whose names end in @file{.elc} even -though there's an element @code{".elc"} in the list. +ordinary file names, and do not apply to names of directories. @vindex completion-auto-help - Normally, a completion command that cannot determine even one -additional character automatically displays a list of all possible -completions. If the variable @code{completion-auto-help} is set to -@code{nil}, this automatic display is disabled, so you must type -@kbd{?} to display the list of completions. + If @code{completion-auto-help} is set to @code{nil}, the completion +commands never display a list of possibilities; you must type @kbd{?} +to display the list. @cindex Partial Completion mode @vindex partial-completion-mode @@ -408,30 +384,29 @@ completions. If the variable @code{completion-auto-help} is set to Partial Completion mode implements a more powerful kind of completion that can complete multiple words in parallel. For example, it can complete the command name abbreviation @code{p-b} into -@code{print-buffer}, because no other command starts with two words -whose initials are @samp{p} and @samp{b}. +@code{print-buffer} if no other command starts with two words whose +initials are @samp{p} and @samp{b}. + + To enable this mode, use @kbd{M-x partial-completion-mode}, or +customize the variable @code{partial-completion-mode}. This mode +binds special partial completion commands to @key{TAB}, @key{SPC}, +@key{RET}, and @kbd{?} in the minibuffer. The usual completion +commands are available on @kbd{M-@key{TAB}} (or @kbd{C-M-i}), +@kbd{M-@key{SPC}}, @kbd{M-@key{RET}} and @kbd{M-?}. Partial completion of directories in file names uses @samp{*} to indicate the places for completion; thus, @file{/u*/b*/f*} might -complete to @file{/usr/bin/foo}. - - For remote files, partial completion enables completion of methods, -user names and host names. @xref{Remote Files}. - - To enable this mode, use the command @kbd{M-x -partial-completion-mode}, or customize the variable -@code{partial-completion-mode}. This binds the partial completion -commands to @key{TAB}, @key{SPC}, @key{RET}, and @kbd{?}. The usual -completion commands are available on @kbd{M-@key{TAB}} (or -@kbd{C-M-i}), @kbd{M-@key{SPC}}, @kbd{M-@key{RET}} and @kbd{M-?}. +complete to @file{/usr/bin/foo}. For remote files, partial completion +enables completion of methods, user names and host names. +@xref{Remote Files}. @vindex PC-include-file-path @vindex PC-disable-includes - Another feature of Partial Completion mode is to extend -@code{find-file} so that @samp{<@var{include}>} stands for the -file named @var{include} in some directory in the path -@code{PC-include-file-path}. If you set @code{PC-disable-includes} to -non-@code{nil}, this feature is disabled. + Partial Completion mode also extends @code{find-file} so that +@samp{<@var{include}>} looks for the file named @var{include} in the +directories in the path @code{PC-include-file-path}. If you set +@code{PC-disable-includes} to non-@code{nil}, this feature is +disabled. @cindex Icomplete mode @findex icomplete-mode @@ -446,52 +421,50 @@ icomplete-mode}. @cindex history of minibuffer input Every argument that you enter with the minibuffer is saved on a -@dfn{minibuffer history list} so that you can use it again later in -another argument. Special commands load the text of an earlier argument -in the minibuffer. They discard the old minibuffer contents, so you can -think of them as moving through the history of previous arguments. +@dfn{minibuffer history list} so you can easily use it again later. +Special commands fetch the text of an earlier argument into the +minibuffer, replacing the old minibuffer contents. You can think of +them as moving through the history of previous arguments. @table @kbd @item @key{UP} @itemx M-p -Move to the next earlier argument string saved in the minibuffer history +Move to the previous item in the minibuffer history, an earlier argument (@code{previous-history-element}). @item @key{DOWN} @itemx M-n -Move to the next later argument string saved in the minibuffer history +Move to the next item in the minibuffer history (@code{next-history-element}). @item M-r @var{regexp} @key{RET} -Move to an earlier saved argument in the minibuffer history that has a -match for @var{regexp} (@code{previous-matching-history-element}). +Move to an earlier item in the minibuffer history that +matches @var{regexp} (@code{previous-matching-history-element}). @item M-s @var{regexp} @key{RET} -Move to a later saved argument in the minibuffer history that has a -match for @var{regexp} (@code{next-matching-history-element}). +Move to a later item in the minibuffer history that matches +@var{regexp} (@code{next-matching-history-element}). @end table @kindex M-p @r{(minibuffer history)} @kindex M-n @r{(minibuffer history)} @findex next-history-element @findex previous-history-element - The simplest way to reuse the saved arguments in the history list is -to move through the history list one element at a time. While in the -minibuffer, use @kbd{M-p} or up-arrow -(@code{previous-history-element}) to ``move to'' the next earlier -minibuffer input, and use @kbd{M-n} or down-arrow -(@code{next-history-element}) to ``move to'' the next later input. -These commands don't move the cursor, they bring different saved -strings into the minibuffer. But you can think of them as ``moving'' -through the history list. - - The previous input that you fetch from the history entirely replaces -the contents of the minibuffer. To use it as the argument, exit the -minibuffer as usual with @key{RET}. You can also edit the text before -you reuse it; this does not change the history element that you -``moved'' to, but your new argument does go at the end of the history -list in its own right. - - For many minibuffer arguments there is a ``default'' value. Then -you can insert the default value into the minibuffer as text by using -@kbd{M-n} to move ``into the future'' in the history. + To move through the minibuffer history list one item at a time, use +@kbd{M-p} or up-arrow (@code{previous-history-element}) to fetch the +next earlier minibuffer input, and use @kbd{M-n} or down-arrow +(@code{next-history-element}) to fetch the next later input. These +commands don't move the cursor, they pull different saved strings into +the minibuffer. But you can think of them as ``moving'' through the +history list. + + The input that you fetch from the history entirely replaces the +contents of the minibuffer. To use it again unchanged, just type +@key{RET}. You can also edit the text before you reuse it; this does +not change the history element that you ``moved'' to, but your new +argument does go at the end of the history list in its own right. + + For many minibuffer arguments there is a ``default'' value. You can +insert the default value into the minibuffer as text by using +@kbd{M-n}. You can think of this as moving ``into the future'' in the +history. @findex previous-matching-history-element @findex next-matching-history-element @@ -499,14 +472,13 @@ you can insert the default value into the minibuffer as text by using @kindex M-s @r{(minibuffer history)} There are also commands to search forward or backward through the history; they search for history elements that match a regular -expression that you specify with the minibuffer. @kbd{M-r} -(@code{previous-matching-history-element}) searches older elements in -the history, while @kbd{M-s} (@code{next-matching-history-element}) -searches newer elements. By special dispensation, these commands can -use the minibuffer to read their arguments even though you are already -in the minibuffer when you issue them. As with incremental searching, -an upper-case letter in the regular expression makes the search -case-sensitive (@pxref{Search Case}). +expression. @kbd{M-r} (@code{previous-matching-history-element}) +searches older elements in the history, while @kbd{M-s} +(@code{next-matching-history-element}) searches newer elements. These +commands are unusual; they use the minibuffer to read the regular +expression even though they are invoked from the minibuffer. As with +incremental searching, an upper-case letter in the regular expression +makes the search case-sensitive (@pxref{Search Case}). @ignore We may change the precise way these commands read their arguments. @@ -519,46 +491,45 @@ actually available, type @kbd{C-h f previous-matching-history-element}. @end ignore All uses of the minibuffer record your input on a history list, but -there are separate history lists for different kinds of arguments. For -example, there is a list for file names, used by all the commands that -read file names. (As a special feature, this history list records -the absolute file name, no more and no less, even if that is not how -you entered the file name.) - - There are several other very specific history lists, including one for -command names read by @kbd{M-x}, one for buffer names, one for arguments -of commands like @code{query-replace}, and one for compilation commands -read by @code{compile}. Finally, there is one ``miscellaneous'' history -list that most minibuffer arguments use. +there are separate history lists for different kinds of arguments. +For example, there is a list for file names, used by all the commands +that read file names. (As a special feature, this history list +records the absolute file name, even if the name you entered was not +absolute.) + + There are several other specific history lists, including one for +buffer names, one for arguments of commands like @code{query-replace}, +one used by @kbd{M-x} for command names, and one used by +@code{compile} for compilation commands. Finally, there is one +``miscellaneous'' history list that most minibuffer arguments use. @vindex history-length The variable @code{history-length} specifies the maximum length of a -minibuffer history list; once a list gets that long, the oldest element -is deleted each time an element is added. If the value of -@code{history-length} is @code{t}, though, there is no maximum length -and elements are never deleted. +minibuffer history list; adding a new element deletes the oldest +element if the list gets too long. If the value of +@code{history-length} is @code{t}, though, there is no maximum length. @vindex history-delete-duplicates The variable @code{history-delete-duplicates} specifies whether to -delete duplicates in history. If the value of @code{history-delete-duplicates} -is @code{t}, that means when adding a new history element, all -previous identical elements are deleted. +delete duplicates in history. If it is @code{t}, adding a new element +deletes from the list all other elements that are equal to it. @node Repetition @section Repeating Minibuffer Commands @cindex command history @cindex history of commands - Every command that uses the minibuffer at least once is recorded on a -special history list, together with the values of its arguments, so that -you can repeat the entire command. In particular, every use of -@kbd{M-x} is recorded there, since @kbd{M-x} uses the minibuffer to read -the command name. + Every command that uses the minibuffer once is recorded on a special +history list, the @dfn{command history}, together with the values of +its arguments, so that you can repeat the entire command. In +particular, every use of @kbd{M-x} is recorded there, since @kbd{M-x} +uses the minibuffer to read the command name. @findex list-command-history @table @kbd @item C-x @key{ESC} @key{ESC} -Re-execute a recent minibuffer command (@code{repeat-complex-command}). +Re-execute a recent minibuffer command from the command history + (@code{repeat-complex-command}). @item M-x list-command-history Display the entire command history, showing all the commands @kbd{C-x @key{ESC} @key{ESC}} can repeat, most recent first. @@ -566,36 +537,33 @@ Display the entire command history, showing all the commands @kindex C-x ESC ESC @findex repeat-complex-command - @kbd{C-x @key{ESC} @key{ESC}} is used to re-execute a recent -minibuffer-using command. With no argument, it repeats the last such -command. A numeric argument specifies which command to repeat; one -means the last one, and larger numbers specify earlier ones. + @kbd{C-x @key{ESC} @key{ESC}} is used to re-execute a recent command +that used the minibuffer. With no argument, it repeats the last such +command. A numeric argument specifies which command to repeat; 1 +means the last one, 2 the previous, and so on. @kbd{C-x @key{ESC} @key{ESC}} works by turning the previous command into a Lisp expression and then entering a minibuffer initialized with -the text for that expression. If you type just @key{RET}, the command -is repeated as before. You can also change the command by editing the -Lisp expression. Whatever expression you finally submit is what will be -executed. The repeated command is added to the front of the command -history unless it is identical to the most recently executed command -already there. - - Even if you don't understand Lisp syntax, it will probably be obvious -which command is displayed for repetition. If you do not change the -text, it will repeat exactly as before. +the text for that expression. Even if you don't understand Lisp +syntax, it will probably be obvious which command is displayed for +repetition. If you type just @key{RET}, that repeats the command +unchanged. You can also change the command by editing the Lisp +expression before you execute it. The repeated command is added to +the front of the command history unless it is identical to the most +recently item. Once inside the minibuffer for @kbd{C-x @key{ESC} @key{ESC}}, you can use the minibuffer history commands (@kbd{M-p}, @kbd{M-n}, @kbd{M-r}, @kbd{M-s}; @pxref{Minibuffer History}) to move through the history list of saved entire commands. After finding the desired previous command, -you can edit its expression as usual and then resubmit it by typing -@key{RET} as usual. +you can edit its expression as usual and then repeat it by typing +@key{RET}. @vindex isearch-resume-in-command-history - Incremental search does not, strictly speaking, use the minibuffer, -but it does something similar. Although it behaves like a complex command, -it normally does not appear in the history list for @kbd{C-x -@key{ESC} @key{ESC}}. You can make it appear in the history by + Incremental search does not, strictly speaking, use the minibuffer. +Therefore, although it behaves like a complex command, it normally +does not appear in the history list for @kbd{C-x @key{ESC} @key{ESC}}. +You can make incremental search commands appear in the history by setting @code{isearch-resume-in-command-history} to a non-@code{nil} value. @xref{Incremental Search}. -- 2.39.2