1 <?xml version="1.0" encoding="UTF-8"?>
2 <?xml-stylesheet type="text/xsl" href="dactyl://content/help.xsl"?>
4 <!DOCTYPE document SYSTEM "dactyl://cache/modes.dtd">
8 title="&dactyl.appName; Key Mappings"
10 xmlns:dactyl="&xmlns.dactyl;"
11 xmlns:html="&xmlns.html;">
13 <h1 tag="keyboard-shortcuts">Keyboard shortcuts and commands</h1>
17 &dactyl.appName; provides a number of commands to change the
18 behavior of key presses. This can mean anything from
19 automatically substituting one key for another or automatically
20 replacing one typed word for another, to launching a dialog or
24 <h2 tag="key-mapping mapping map macro">Key mapping</h2>
27 Key mappings are the most basic means &dactyl.appName; provides
28 for altering the actions of key presses. Each key mapping is
29 associated with a mode, such as <link topic="insert-mode">Insert</link>,
30 <link>Normal</link>, or
31 <link topic="command-line-mode">Command Line</link>, and only
32 has effect when that mode is active. Although each mode has a
33 full suite of internal mappings, they may be easily augmented,
34 altered, or removed with the <ex>:map</ex> command and its
35 variants. These commands, in essence, allow the user to quickly
36 substitute one sequence of key presses for another.
40 <code><ex>:map <k name="F2" link="false"/></ex> <ex>:styletoggle</ex> <em>-name</em> <k name="A-Tab" link="c_<Tab>"/></code>
43 causes “<tt><ex>:styletoggle</ex> <em>-name</em> <k name="A-Tab" link="c_<Tab"/></tt>” to be typed out
44 whenever <k name="F2" link="false"/> is pressed, providing a way to toggle
45 a tab-completed named user style.
49 You can also map keys to <link topic="ex-scripts">Ex</link> or
50 <link topic=":js">JavaScript</link> commands, see the
51 <link topic="map-examples">examples</link>.
55 Standard key mapping commands are provided for the five most
60 <dt>n</dt> <dd>Normal mode: When browsing normally</dd>
61 <dt>v</dt> <dd>Visual mode: When selecting text with the cursor keys</dd>
62 <dt>i</dt> <dd>Insert mode: When interacting with text fields on a website</dd>
63 <dt>t</dt> <dd>Text Edit mode: When editing text fields in Vim-like Normal mode</dd>
64 <dt>c</dt> <dd>Command Line mode: When typing into the &dactyl.appName; command line</dd>
65 <dt>o</dt> <dd>Operator mode: When moving the cursor</dd>
69 The ordinary <ex>:map</ex> and <ex>:noremap</ex> commands
70 add mappings for Normal and Visual mode. In order to map key
71 bindings in a different mode, any of the mapping commands may be
72 prefixed with one of the above letters. For instance,
73 <ex>:imap</ex> creates a new key mapping in Insert mode, while
74 <ex>:cunmap</ex> removes a key mapping from Command Line mode.
75 Other modes can be specified using the <em>-modes</em> option described below.
79 It is important to note that mappings are <em>not</em>
80 automatically saved between sessions. In order to preserve them,
81 they must either be added to your <tt><t>&dactyl.name;rc</t></tt> or
82 saved via the <ex>:mk&dactyl.name;rc</ex> command.
86 The following tree represents all of the modes understood by
87 dactyl. Mappings for a mode also apply to its children and
88 descendants. So a mapping in the Base mode, for instance, is
89 also active in Normal and Ex mode.
94 <h3 tag=":map-commands">Map commands</h3>
98 <spec>:map <a>lhs</a> <a>rhs</a></spec>
99 <tags>:nm :nmap</tags>
100 <spec>:nm<oa>ap</oa> <a>lhs</a> <a>rhs</a></spec>
101 <tags>:vm :vmap</tags>
102 <spec>:vm<oa>ap</oa> <a>lhs</a> <a>rhs</a></spec>
103 <tags>:im :imap</tags>
104 <spec>:im<oa>ap</oa> <a>lhs</a> <a>rhs</a></spec>
105 <tags>:tm :tmap</tags>
106 <spec>:tm<oa>ap</oa> <a>lhs</a> <a>rhs</a></spec>
107 <tags>:cm :cmap</tags>
108 <spec>:cm<oa>ap</oa> <a>lhs</a> <a>rhs</a></spec>
111 Map the <t>key-sequence</t> <a>lhs</a> to <a>rhs</a> for
112 the applicable mode(s). The keys of <a>rhs</a> respect
113 user-defined mappings, so the following will result in
116 <code><ex>:map a b</ex>
117 <ex>:map b a</ex></code>
119 In order to avoid this shortcoming, the <ex>:noremap</ex> command
120 or the <em>-builtin</em> option may be used.
125 <p tag=":map-overview">
126 Below is an overview of which modes each map command applies to:
129 <dl dt="width: 20em;">
130 <dt>:map :noremap :unmap</dt> <dd>Normal and Visual modes</dd>
131 <dt>:nmap :nnoremap :nunmap</dt> <dd>Normal mode</dd>
132 <dt>:vmap :vnoremap :vunmap</dt> <dd>Visual mode</dd>
133 <dt>:imap :inoremap :iunmap</dt> <dd>Insert mode</dd>
134 <dt>:tmap :tnoremap :tunmap</dt> <dd>Text Edit mode</dd>
135 <dt>:cmap :cnoremap :cunmap</dt> <dd>Command Line mode</dd>
139 The <em>-modes</em> option, described below, provides a more flexible way
140 to specify the applicable modes.
143 <h3 tag=":map-options">Map options</h3>
145 Any of the map commands may be given the following options:
148 <dl dt="width: 12em;">
151 <dt>-arg</dt> <dd>Accept an argument after the requisite key press. Sets the <tt>arg</tt> parameter to the result. (short name <em>-a</em>)</dd>
152 <dt>-builtin</dt> <dd>Execute this mapping as if there were no user-defined mappings. (short name <em>-b</em>)</dd>
153 <dt>-count</dt> <dd>Accept a count before the requisite key press. Sets the <tt>count</tt> parameter to the result. (short name <em>-c</em>)</dd>
154 <dt>-description</dt> <dd>A description of this mapping. (short name <em>-d</em>)</dd>
155 <dt>-ex</dt> <dd>Execute <a>rhs</a> as an Ex command rather than keys. (short name <em>-e</em>)</dd>
156 <dt>-group=<a>group</a></dt> <dd>Add this command to the given <t>group</t> (short name <em>-g</em>). When listing commands this limits the output to the specified group.</dd>
157 <dt>-javascript</dt> <dd>Execute <a>rhs</a> as JavaScript rather than keys. (short names <em>-js</em>, <em>-j</em>)</dd>
158 <dt>-literal=<a>n</a></dt> <dd>Parse the <a>n</a>th argument without specially processing any quote or meta characters. (short name <em>-l</em>)</dd>
159 <dt>-modes=<a>modes</a></dt> <dd>Create this mapping in the given modes. (short names <em>-mode</em>, <em>-m</em>)</dd>
160 <dt>-nopersist</dt> <dd>Do not save this mapping to an auto-generated rc file. (short name <em>-n</em>)</dd>
161 <dt>-silent</dt> <dd>Do not echo any generated keys to the command line. (short name <em>-s</em>, also <em><silent></em> for Vim compatibility)</dd>
165 <tags>:no :noremap</tags>
166 <spec>:no<oa>remap</oa> <a>lhs</a> <a>rhs</a></spec>
167 <tags>:nno :nnoremap</tags>
168 <spec>:nno<oa>remap</oa> <a>lhs</a> <a>rhs</a></spec>
169 <tags>:vno :vnoremap</tags>
170 <spec>:vno<oa>remap</oa> <a>lhs</a> <a>rhs</a></spec>
171 <tags>:ino :inoremap</tags>
172 <spec>:ino<oa>remap</oa> <a>lhs</a> <a>rhs</a></spec>
173 <tags>:tno :tnoremap</tags>
174 <spec>:tno<oa>remap</oa> <a>lhs</a> <a>rhs</a></spec>
175 <tags>:cno :cnoremap</tags>
176 <spec>:cno<oa>remap</oa> <a>lhs</a> <a>rhs</a></spec>
179 Map the <t>key-sequence</t> <a>lhs</a> to <a>rhs</a> for
180 the applicable mode(s). The keys in <a>rhs</a> do not
181 respect user-defined key mappings, so the following
182 effectively reverses the default meanings of the keys
183 <k>d</k> and <k>D</k>
185 <code><ex>:noremap d D</ex>
186 <ex>:noremap D d</ex></code>
191 <spec>:unmap <a>lhs</a></spec>
192 <tags>:unm :unmap</tags>
194 <spec>:nun<oa>map</oa> <a>lhs</a></spec>
195 <tags>:nun :nunmap</tags>
196 <spec>:nun<oa>map</oa>!</spec>
197 <spec>:vun<oa>map</oa> <a>lhs</a></spec>
198 <tags>:vun :vunmap</tags>
199 <spec>:vun<oa>map</oa>!</spec>
200 <spec>:iu<oa>nmap</oa> <a>lhs</a></spec>
201 <tags>:iu :iunmap</tags>
202 <spec>:iu<oa>nmap</oa>!</spec>
203 <spec>:tu<oa>nmap</oa> <a>lhs</a></spec>
204 <tags>:tu :tunmap</tags>
205 <spec>:tu<oa>nmap</oa>!</spec>
206 <spec>:cu<oa>nmap</oa> <a>lhs</a></spec>
207 <tags>:cu :cunmap</tags>
208 <spec>:cu<oa>nmap</oa>!</spec>
210 <p>Remove the mapping of <a>lhs</a> (or all mappings if <oa>!</oa> is
211 given) for the applicable mode(s).</p>
217 <spec>:nm<oa>ap</oa></spec>
218 <spec>:vm<oa>ap</oa></spec>
219 <spec>:im<oa>ap</oa></spec>
220 <spec>:tm<oa>ap</oa></spec>
221 <spec>:cm<oa>ap</oa></spec>
224 List all mappings for the applicable mode(s). Mappings are
225 partitioned into <t>groups</t>.
232 <spec>:map <a>lhs</a></spec>
234 <spec>:nm<oa>ap</oa> <a>lhs</a></spec>
236 <spec>:vm<oa>ap</oa> <a>lhs</a></spec>
238 <spec>:im<oa>ap</oa> <a>lhs</a></spec>
240 <spec>:tm<oa>ap</oa> <a>lhs</a></spec>
242 <spec>:cm<oa>ap</oa> <a>lhs</a></spec>
244 <p>List all mappings starting with <a>lhs</a> for the applicable mode(s).</p>
248 <h3 tag=":map-timeout map-timeout">Mapping timeout</h3>
250 When &dactyl.appName; receives a key event that has a separate binding and
251 at the same time is part of a key chain, values of the <o>timeout</o> and
252 <o>timeoutlen</o> options are used to decide what to do. See the
253 documentation of those options for more information.
256 <h3 tag="key-notation key-sequence">Key sequences</h3>
259 Most keys in key sequences are represented simply by the
260 character that you see on the screen when you type them.
261 However, as a number of these characters have special meanings,
262 and a number of keys have no visual representation, a special
263 notation is required.
268 The first argument to the <ex>:map</ex> commands must be
269 <link topic="quoting">quoted</link> if it contains spaces,
270 quotation marks or back-slashes. A space may additionally be
271 typed as <k name="Space"/>.
274 As special key names start with the <em><</em> character,
275 a literal < must be typed as <k name="lt" link="false"/>.
278 <k name="Left"/>, <k name="Right"/>, <k name="Up"/>,
279 and <k name="Down"/> represent the standard arrow keys.
282 <k name="CapsLock" link="false"/>, <k name="NumLock" link="false"/>, <k name="Insert"/>
283 <k name="Del" link="false"/>, <k name="Tab"/>, <k name="PageUp"/>,
284 <k name="PageDown"/>, and <k name="Esc"/> work as
288 <k name="Return" link="false"/> or <k name="CR"/> represent the carriage
291 <li><k name="BS" link="false"/> represents the backspace key.</li>
292 <li><k name="F1"/> through <k name="F12" link="false"/> work as expected.</li>
294 <k name="K0" link="false"/> through <k name="K9" link="false"/> represent keys on the
298 <k name="Uxxxx" link="false"/>, where <em>xxxx</em> is any 4 hexadecimal
299 digits, represents the character at that Unicode codepoint.
300 For instance, <k name="U263a" link="false"/> represents ☺.
305 In order to represent key presses using the Control, Alt, Meta,
306 or Shift keys, the following prefixes may be used,
310 <li><k name="C-␣" link="false"/>: The control or ctrl key.</li>
311 <li><k name="A-␣" link="false"/>: The alt key.</li>
312 <li><k name="M-␣" link="false"/>: The meta key, windows key, or command key.</li>
313 <li><k name="⌘-␣" link="false"/>: Same as <k name="M-␣" link="false"/>.</li>
314 <li><k name="S-␣" link="false"/>: The shift key.</li>
318 These prefixes can be combined however you see fit.
322 Within angle brackets all alphabetic characters are read as lowercase.
323 Uppercase characters can only be specified with the <em>S-</em> modifier.
327 The following key sequences are interpreted as described:
330 <dl dt="width: 10em;">
331 <dt><k link="false">xc</k></dt>
332 <dd>Press the ‘X’ key followed by the ‘C’ key.</dd>
334 <dt><k name="C-x" link="false">c</k></dt>
336 Press the ‘X’ key while holding the ‘Control’ key, followed
340 <dt><k name="C-2" link="false"/></dt>
341 <dd>Type ‘2’ while holding the ‘Control’ key.</dd>
343 <dt><k name="C-@" link="false"/></dt>
344 <dd>Press the ‘@’ key while holding the ‘Control’ key.</dd>
346 <dt><k name="S-Space" link="false"/></dt>
347 <dd>Press the space bar while holding the ‘Shift’ key.</dd>
349 <dt><k name="C-A-j" link="false"/></dt>
350 <dd>Press the ‘J’ key while holding both the ‘Control’ and ‘Alt’ keys.</dd>
352 <dt><k name="C-A-J" link="false"/></dt>
353 <dd>Exactly the same as above.</dd>
355 <dt><k name="C-A-S-j" link="false"/></dt>
356 <dd>Press the ‘J’ key while holding all of ‘Control’, ‘Alt’, and ‘Shift’ keys.</dd>
359 <h3 tag=":map-special-chars">Special characters</h3>
362 <tags><![CDATA[<Nop>]]></tags>
364 <spec><![CDATA[<Nop>]]></spec>
367 Do nothing. This pseudo-key is useful for disabling a
368 specific builtin mapping. For example,
369 <ex>:map <k name="C-n"/> <k name="Nop"/></ex> will prevent <k name="C-n"/>
376 <tags><![CDATA[<Pass>]]></tags>
377 <spec><![CDATA[<Pass>]]></spec>
378 <description short="true">
380 Pass the events consumed by the last executed mapping through to &dactyl.host;.
386 <tags><![CDATA[<CR> map_return]]></tags>
388 <spec><![CDATA[<CR>]]></spec>
391 Expand to a line terminator in a key mapping. An Ex command in the <a>rhs</a> of a
392 mapping requires a line terminator after it so that it is executed when the
393 mapping is expanded. <k name="CR"/> should be used for this purpose.
399 <tags><![CDATA[<Leader> \]]></tags>
401 <spec><![CDATA[<Leader>]]></spec>
404 A pseudo-key which expands to the value of the <o>mapleader</o>
405 option. For example, by default,
407 <code><ex>:map <k name="Leader"/>h</ex> <ex>:echo <str>Hello</str><k name="CR"/></ex></code>
409 <code><ex>:map \h</ex> <ex>:echo <str>Hello</str><k name="CR"/></ex></code>
411 <set opt="mapleader"><str>,</str></set>
413 <code><ex>:map ,h</ex> <ex>:echo <str>Hello</str><k name="CR"/></ex></code>
417 <h3 tag="map-examples">Mapping examples</h3>
419 <p>Make <k name="A-n" link="false"/> do the same as <k name="Down" link="false"/> in input <t>modes</t>:</p>
421 <code><ex>:map</ex> <em>-b</em> <em>-m</em> input <k name="A-n" link="false"/> <k name="Down" link="false"/></code>
423 <p>Toggle the tab line with <k name="A-t" link="false"/>:</p>
425 <code><ex>:map</ex> <em>-ex</em> <k name="A-t" link="false"/> <se opt="showtabline" op="!="><str delim="">always</str>,<str delim="">never</str></se></code>
427 <p>Make <k name="A-i" link="false"/> toggle image display:</p>
429 <code><ex>:map</ex> <k name="A-i" link="false"/> <em>-js</em> <<<em>EOF</em>
430 let (pref = <str>permissions.default.image</str>)
431 prefs.set(pref, prefs.get(pref) == 1 ? 2 : 1);
432 tabs.reload(config.browser.mCurrentTab);
436 <h2 tag="bypassing-&dactyl.name;">Bypassing &dactyl.appName;</h2>
438 &dactyl.appName; overrides nearly all &dactyl.host; keys in order to
439 make browsing more pleasant for Vim users. On the occasions when you
440 want to bypass &dactyl.appName;'s key handling and pass keys directly to
441 &dactyl.host; or to a web page, you have several options:
444 <tags><![CDATA[<pass-next-key-builtin> <A-b>]]></tags>
445 <spec><![CDATA[<A-b>]]></spec>
448 Process the next key as a builtin mapping, ignoring any user defined
449 mappings and <o>passkeys</o> settings.
455 <tags><![CDATA[send-key <pass-next-key> <C-v>]]></tags>
456 <spec><![CDATA[<C-v>]]></spec>
459 Pass the next key press directly to &dactyl.host;.
465 <tags><![CDATA[pass-through <pass-all-keys> <C-z>]]></tags>
466 <spec><![CDATA[<C-z>]]></spec>
469 Pass all keys except for <k name="Esc"/> directly to
470 &dactyl.host;. When <k name="Esc"/> is pressed,
471 resume normal key handling. This is especially useful
472 for web sites which make heavy use of key bindings.
478 See also <o>passkeys</o> and <o>passunknown</o> for ways to permanently pass
479 all or particular keys under certain conditions.
482 <h2 tag="abbreviations">Abbreviations</h2>
485 In addition to basic mappings, &dactyl.appName; can also
486 automatically replace whole words after they've been typed.
487 These shortcuts are known as abbreviations, and are most often
488 useful for correcting spelling of commonly mistyped words, as
489 well as shortening the typing of oft-typed but long words or
490 phrases. There are three basic types of abbreviations, defined
491 by the types of characters they contain,
495 <li>‘full-id’ abbreviations consist entirely of keyword characters (e.g., ‘teh’, ‘msoft’).</li>
496 <li>‘end-id’ abbreviations end in keyword character but otherwise contains all non-keyword characters (e.g., ‘'i’).</li>
497 <li>‘non-id’ abbreviations end in a non-keyword character but otherwise contains any non-whitespace character (e.g., ‘def'’).</li>
498 <li>Strings which fit none of the above patterns can not be defined as abbreviations (e.g., ‘a'b’ and ‘a b’).</li>
502 For the purposes of abbreviations, keyword characters include
503 all non-whitespace characters except for single or double
504 quotation marks. Abbreviations are expanded as soon as any
505 non-keyword character, or the key <k name="C-]" mode="c"/>, is typed.
509 <tags>:ab :abbreviate</tags>
510 <spec>:ab<oa>breviate</oa> <oa>-group=<a>group</a></oa> <oa>-js</oa> <a>lhs</a> <a>rhs</a></spec>
511 <spec>:ab<oa>breviate</oa> <oa>-group=<a>group</a></oa> <a>lhs</a></spec>
512 <spec>:ab<oa>breviate</oa> <oa>-group=<a>group</a></oa></spec>
515 Abbreviate <a>lhs</a> to <a>rhs</a>. If only <a>lhs</a>
516 is given, list all abbreviations that start with
517 <a>lhs</a>. If no arguments are given, list all
522 If the <em>-javascript</em> (short names <em>-js</em>,
523 <em>-j</em>) option is given, <a>lhs</a> is expanded to
524 the value <em>return</em>ed by the JavaScript code
525 <a>rhs</a>. The code is evaluated with the variable
526 <em>editor</em> set to the editable element that the
527 abbreviation is currently being expanded in. The code
528 should <em>not</em> make any changes to the contents of
533 If <a>group</a> is specified then abbreviations are created or
534 listed for the given <t>group</t>.
540 <tags>:ca :cabbreviate</tags>
541 <spec>:ca<oa>bbreviate</oa> <a>lhs</a> <a>rhs</a></spec>
542 <spec>:ca<oa>bbreviate</oa> <a>lhs</a></spec>
543 <spec>:ca<oa>bbreviate</oa></spec>
546 Abbreviate a key sequence for Command Line mode. Same as
547 <ex>:ab<oa>breviate</oa></ex>, but for &mode.command-line; mode
554 <tags>:ia :iabbreviate</tags>
555 <spec>:ia<oa>bbreviate</oa> <a>lhs</a> <a>rhs</a></spec>
556 <spec>:ia<oa>bbreviate</oa> <a>lhs</a></spec>
557 <spec>:ia<oa>bbreviate</oa></spec>
560 Abbreviate a key sequence for Insert mode. Same as
561 <ex>:ab<oa>breviate</oa></ex>, but for Insert mode only.
567 <tags>:una :unabbreviate</tags>
568 <spec>:una<oa>bbreviate</oa> <a>lhs</a></spec>
569 <spec>:una<oa>bbreviate</oa>!</spec>
571 <p>Remove an abbreviation. With <oa>!</oa>, remove all abbreviations.</p>
576 <tags>:cuna :cunabbreviate</tags>
577 <spec>:cuna<oa>bbreviate</oa> <a>lhs</a></spec>
578 <spec>:cuna<oa>bbreviate</oa>!</spec>
581 Remove abbreviation(s) for Command Line mode. Same as
582 <ex>:una<oa>bbreviate</oa></ex>, but for &mode.command-line; mode
589 <tags>:iuna :iunabbreviate</tags>
590 <spec>:iuna<oa>bbreviate</oa> <a>lhs</a></spec>
591 <spec>:iuna<oa>bbreviate</oa>!</spec>
594 Remove abbreviation(s) for Insert mode. Same as
595 <ex>:una<oa>bbreviate</oa></ex> but for Insert mode
601 <h2 tag="user-commands">User-defined commands</h2>
604 Defining new commands is perhaps the most straightforward way of
605 repeating commonly used actions. User-defined commands may be
606 entered from the command line or scripts exactly like standard
607 commands, and may similarly accept arguments, options, counts,
608 and <oa>!</oa>s, as well as provide command-line completion.
609 These commands may be defined as either ordinary,
610 macro-interpolated Ex commands, or otherwise as plain
611 JavaScript statements.
615 <tags>:com :command</tags>
616 <spec>:com<oa>mand</oa></spec>
617 <description short="true">
618 <p>List all user-defined commands.</p>
623 <spec>:com<oa>mand</oa> <oa>cmd</oa></spec>
626 List all user-defined commands that start with <oa>cmd</oa>. Commands
627 are partitioned into <t>groups</t>.
633 <spec>:com<oa>mand</oa><oa>!</oa> <oa><a>options</a>…</oa> <a>cmd</a> <a>rep</a></spec>
636 Define a new user command. The name of the command is
637 <a>cmd</a> and its replacement text is <a>rep</a>. If a
638 command with this name already exists, an error is
639 reported unless <oa>!</oa> is specified, in which case
640 the command is redefined. Unlike Vim, the command may
641 start with a lowercase letter. <a>cmd</a> may also be multiple
642 alternative command names separated by commas.
646 The new command is usually defined by a string to be
647 executed as an Ex command. In this case, before
648 execution, strings of the form
649 <hl key="HelpKey"><<a>var</a>></hl> are interpolated
650 as described below, in order to insert arguments,
651 options, and the like. If the <em>-javascript</em> (short
652 name <em>-js</em>) flag is present, the command is
653 executed as JavaScript, and the arguments are present as
654 variables in its scope instead, and no interpolation is
659 The command's behavior can be altered by providing
660 options when the command is defined.
663 <h3 tag=":command-group">Grouping</h3>
666 The <em>-group</em> flag (short name: <em>-g</em>) can be used to
667 assign this command to a specific <t>group</t>. When listing
668 commands this limits the output to the specified group.
671 <h3 tag="E175 E176 :command-nargs">Argument handling</h3>
674 By default, user commands accept no arguments. This can be changed by specifying
675 the <em>-nargs</em> option.
678 <p>The valid values are:</p>
681 <dt>-nargs=0</dt><dd>No arguments are allowed (default)</dd>
682 <dt>-nargs=1</dt><dd>One argument is allowed</dd>
683 <dt>-nargs=*</dt><dd>Zero or more arguments are allowed</dd>
684 <dt>-nargs=?</dt><dd>Zero or one argument is allowed</dd>
685 <dt>-nargs=+</dt><dd>One or more arguments are allowed</dd>
688 <h3 tag="E180 E181 :command-complete">Argument completion</h3>
691 Completion for arguments to user-defined commands is not available by default.
692 Completion can be enabled by specifying one of the following arguments to the
693 <em>-complete</em> option when defining the command.
696 <dl tag=":command-complete-arg-list"/>
698 <h3 tag="E467 E468 :command-completion-custom">Custom completion</h3>
701 Custom completion can be provided by specifying the
702 <str>custom,<a>thing</a></str> argument to <em>-complete</em>. If
703 <a>thing</a> evaluates to a function (i.e., it is a variable holding
704 a function value, or a string containing the definition itself), it
705 is called with two arguments: a completion context, and an object
706 describing the command's arguments. It should set the context's
707 <tt>completions</tt> property to the list of completion results.
708 Other influential properties include <tt>title</tt>, <tt>sort</tt>,
709 <tt>anchored</tt>, and <tt>filters</tt>, which are documented in the
710 <link topic="resource://dactyl/completion.jsm"
711 line="17" dactyl:command="buffer.viewSource">source code</link>.
715 <em>completions</em> is a two-dimensional array of the form:
716 <tt>[[val1, description1], [val2, description2], …]</tt>
720 Otherwise <a>thing</a> should evaluate to an array of the same form
721 as the <tt>completions</tt> property of the context object.
726 <code><ex>:command foo -nargs=? -complete custom,<str delim="'">
727 \ function (context) context.completions = [["val1", "description1"], ["val2", "description2"]]</str>
728 \ <ex>:echo</ex> <str>Useless </str> + <em><q-args></em></ex>
730 <ex>:command foo -nargs=?
731 \ -complete custom,<str delim="'">[["val1", "description1"], ["val2", "description2"]]</str>
732 \ <ex>:echo</ex> <str>Same as above but simpler </str> + <em><q-args></em></ex></code>
735 <h3 tag="E177 E178 :command-count">Count handling</h3>
738 By default, user commands do not accept a count. Use the <em>-count</em> option if
739 you'd like to have a count passed to your user command. This will then be
740 available for expansion as <count> in the replacement.
743 <h3 tag=":command-bang">Special cases</h3>
746 By default, a user command does not have a special version, i.e. a version
747 executed with the ! modifier. Providing the <em>-bang</em> option will enable this
748 and <bang> will be available in the replacement.
751 <h3 tag=":command-description">Command description</h3>
754 The command's description text can be set with <em>-description</em>. Otherwise it will
755 default to "User-defined command".
758 <h3 tag=":command-replacement-text">Replacement text</h3>
761 The replacement text <a>rep</a> is scanned for <t>macro-string</t>s and these are
762 replaced with values from the user-entered command line. The resulting string
763 is then executed as an Ex command.
767 In addition to the standard parameters listed in
768 <t>macro-string</t>, the following parameters are available:
772 <dt><args></dt> <dd>The command arguments exactly as supplied</dd>
773 <dt><count></dt><dd>Any supplied count, e.g. 5</dd>
774 <dt><bang></dt> <dd>! if the command was executed with the ! modifier</dd>
780 <tags>:delc :delcommand</tags>
781 <spec>:delc<oa>ommand</oa> <a>cmd</a></spec>
782 <spec>:delc<oa>ommand</oa>!</spec>
784 <p>Delete the user-defined command <a>cmd</a>. With <oa>!</oa>, delete
785 all user commands.</p>
789 <h3 tag="command-examples">Command examples</h3>
791 <p>A command to search via DuckDuckGo:</p>
793 <code><ex>:command</ex> <em>-nargs</em>=* <str delim="">ddg</str> open ddg <args></code>
796 A command to search for contents of the current selection using a
797 tab-completed search engine in the current or a new tab (depending on how
798 much you bang on the keyboard):
801 <code><ex>:com!</ex> <str delim="">search-selection</str>,<str delim="">ss</str> <em>-bang</em> <em>-nargs</em>=? <em>-complete</em> search
802 \ <em>-js</em> commands.execute((bang ? <str>open </str> : <str>tabopen </str>)
803 \ + args + <str> </str> + buffer.currentWord)</code>
807 <!-- vim:se sts=4 sw=4 et: -->