2 This is part of the VimFx documentation.
3 Copyright Simon Lydell 2015, 2016.
4 See the file README.md for copying conditions.
9 This file documents VimFx’s [config file] API.
11 Both `config.js` and `frame.js` have access to a variable called `vimfx`. Note
12 that while the variables have the same name, they are different and provide
13 different API methods.
18 In `config.js`, the following API is available as the variable `vimfx`.
20 ### `vimfx.get(...)`, `vimfx.getDefault(...)` and `vimfx.set(...)`
22 Gets or sets the (default) value of a VimFx option.
24 You can see all options in [defaults.coffee], or by opening [about:config] and
25 filtering by `extensions.vimfx`. Note that you can also access the [special
26 options], which may not be accessed in [about:config], using `vimfx.get(...)`
27 and `vimfx.set(...)`—in fact, this is the _only_ way of accessing those options.
29 #### `vimfx.get(option)`
31 Gets the value of the VimFx option `option`.
34 // Get the value of the Hint characters option:
35 vimfx.get('hints.chars')
36 // Get all keyboard shortcuts (as a string) for the `f` command:
37 vimfx.get('mode.normal.follow')
40 #### `vimfx.getDefault(option)`
42 Gets the default value of the VimFx option `option`.
44 Useful when you wish to extend a default, rather than replacing it. See below.
46 #### `vimfx.set(option, value)`
48 Sets the value of the VimFx option `option` to `value`.
51 // Set the value of the Hint characters option:
52 vimfx.set('hints.chars', 'abcdefghijklmnopqrstuvwxyz')
53 // Add yet a keyboard shortcut for the `f` command:
54 vimfx.set('mode.normal.follow', vimfx.getDefault('mode.normal.follow') + ' ee')
57 When extending an option (as in the second example above), be sure to use
58 `vimfx.getDefault` rather than `vimfx.get`. Otherwise you get a multiplying
59 effect. In the above example, after starting Firefox a few times the option
60 would be `f e e e e`. Also, if you find that example very verbose: Remember
61 that you’re using a programming language! Write a small helper function that
64 Note: If you produce conflicting keyboard shortcuts, the order of your code does
65 not matter. The command that comes first in VimFx’s options page in the Add-ons
66 Manager (and in the Keyboard Shortcuts help dialog) gets the shortcut; the other
67 one(s) do(es) not. See the notes about order in [mode object], [category object]
68 and [command object] for more information about order.
71 // Even though we set the shortcut for focusing the search bar last, the command
72 // for focusing the location bar “wins”, because it comes first in VimFx’s
73 // options page in the Add-ons Manager.
74 vimfx.set('mode.normal.focus_location_bar', 'ö')
75 vimfx.set('mode.normal.focus_search_bar', 'ö')
77 // Swapping their orders also swaps the “winner”.
78 let {commands} = vimfx.modes.normal
79 ;[commands.focus_location_bar.order, commands.focus_search_bar.order] =
80 [commands.focus_search_bar.order, commands.focus_location_bar.order]
83 ### `vimfx.addCommand(options, fn)`
85 Creates a new command.
89 - name: `String`. The name used when accessing the command via
90 `vimfx.modes[options.mode].commands[options.name]`. It is also used for the
91 option name (preference key) used to store the shortcuts for the command:
92 `` `custom.mode.${options.mode}.${options.name}` ``.
93 - description: `String`. Shown in the Keyboard Shortcuts help dialog and VimFx’s
94 options page in the Add-ons Manager.
95 - mode: `String`. Defaults to `'normal'`. The mode to add the command to. The
96 value has to be one of the keys of [`vimfx.modes`].
97 - category: `String`. Defaults to `'misc'` for Normal mode and `''`
98 (uncategorized) otherwise. The category to add the command to. The
99 value has to be one of the keys of [`vimfx.get('categories')`][categories].
100 - order: `Number`. Defaults to putting the command at the end of the category.
101 The first of the default commands has the order `100` and then they increase
102 by `100` per command. This allows to put new commands between two already
105 `fn` is called when the command is activated. See the [onInput] documentation
106 below for more information.
108 <strong id="custom-command-shortcuts">Note</strong> that you have to give the
109 new command a shortcut in VimFx’s options page in the Add-ons Manager or set
110 one using `vimfx.set(...)` to able to use the new command.
115 description: 'Log Hello World',
117 console.log('Hello World!')
120 vimfx.set('custom.mode.normal.hello', 'gö')
123 ### `vimfx.addOptionOverrides(...)` and `vimfx.addKeyOverrides(...)`
125 These methods take any number of arguments. Each argument is a rule. The rules
126 are added in order. The methods may be run multiple times.
128 A rule is an `Array` of length 2:
130 1. The first item is a function that returns `true` if the rule should be
131 applied and `false` if not. This is called the matching function.
132 2. The second item is the value that should be used if the rule is applied. This
133 is called the override.
135 The rules are tried in the same order they were added. When a matching rule is
136 found it is applied. No more rules will be applied.
138 #### `vimfx.addOptionOverrides(...rules)`
140 The rules are matched any time the value of a VimFx option is needed.
142 The matching function receives a [location object].
144 The override is an object whose keys are VimFx option names and whose values
145 override the option in question. The values should be formatted as in an
149 vimfx.addOptionOverrides(
150 [ ({hostname, pathname, hash}) =>
151 `${hostname}${pathname}${hash}` === 'google.com/',
152 {prevent_autofocus: false}
156 vimfx.addOptionOverrides(
157 [ ({hostname}) => hostname === 'imgur.com',
159 pattern_attrs: ['class'],
160 pattern_selector: 'div.next-prev .btn',
161 prev_patterns: [/\bnavPrev\b/],
162 next_patterns: [/\bnavNext\b/],
168 #### `vimfx.addKeyOverrides(...rules)`
170 The rules are matched any time you press a key that is not part of the tail of a
173 The matching function receives a [location object] as well as the current
174 mode name (one of the keys of [`vimfx.modes`]).
176 The override is an array of keys which should not activate VimFx commands but be
179 This allows to disable commands on specific sites. To _add_ commands on specific
180 sites, add them globally and then disable them on all _other_ sites.
183 vimfx.addKeyOverrides(
184 [ location => location.hostname === 'facebook.com',
190 ### `vimfx.send(vim, message, data = null, callback = null)`
192 Send `message` (a string) to the instance of `frame.js` in the tab managed by
193 [`vim`][vim object], and pass it `data`. If provided, `callback` must be a
194 function that takes a single argument, which is the data that `frame.js`
195 responds with. `frame.js` uses its [`vimfx.listen(...)`] method to listen for
196 (and optionally respond to) `message`.
202 // You get a `vim` instance by using `vimfx.addCommand(...)` or `vimfx.on(...)`.
203 vimfx.send(vim, 'getSelection', {example: 5}, selection => {
204 console.log('Currently selected text:', selection)
210 vimfx.listen('getSelection', ({example}, callback) => {
211 console.log('`example` should be 5:', example)
212 let selection = content.getSelection().toString()
217 What if you want to do it the other way around: Send a message _from_ `frame.js`
218 and listen for it in `config.js`? That’s not the common use case, so VimFx does
219 not provide convenience functions for it. Yes, `vimfx.send(...)`, and
220 `vimfx.listen(...)` in `frame.js`, are just light wrappers around the standard
221 Firefox [Message Manager] to make it easier to create custom commands that ask
222 `frame.js` for information about the current web page (as in the above example).
223 If you want to send messages any other way, you’ll need to use the Message
224 Manager directly. See [the `shutdown` event] for an example.
226 (While it would have made sense to provide `vim.send(message, data, callback)`
227 instead of `vimfx.send(vim, message, data, callback)`, the latter was chosen for
228 symmetry between `config.js` and `frame.js`. Use `vimfx.send()` to send
229 messages, and `vimfx.listen()` to listen for them.)
231 ### `vimfx.on(eventName, listener)` and `vimfx.off(eventName, listener)`
233 After calling `vimfx.on(eventName, listener)`, `listener(data)` will be called
234 when `eventName` is fired, where `data` is an object. Which properties `data`
235 has is specific to each event.
237 You may use `vimfx.off(eventName, listener)` if you’d like to remove your
238 added listener for some reason.
240 While [`vimfx.send(...)`] and [`vimfx.listen(...)`] are all about passing
241 messages between `config.js` and `frame.js`, `vimfx.on(...)` is all about doing
242 something whenever VimFx emits internal events.
244 #### The `locationChange` event
246 Occurs when opening a new tab, navigating to a new URL or refreshing the page,
247 causing a full page load.
251 - vim: The current [vim object].
252 - location: A [location object].
254 This event can be used to enter a different mode by default on some pages (which
255 can be used to replace the blacklist option).
258 vimfx.on('locationChange', ({vim, location}) => {
259 if (location.hostname === 'example.com') {
260 vimfx.modes.normal.commands.enter_mode_ignore.run({vim, blacklist: true})
265 #### The `notification` and `hideNotification` events
267 The `notification` event occurs when `vim.notify(message)` is called, and means
268 that `message` should be displayed to the user.
270 The `hideNotification` event occurs when the `vim.hideNotification()` is called,
271 and means that the current notification is requested to be hidden.
275 - vim: The current [vim object].
276 - message: The message that should be notified. Only for the `notification`
279 Both of these events are emitted even if the [`notifications_enabled`] option is
280 disabled, allowing you to display notifications in any way you want.
282 #### The `modeChange` event
284 Occurs whenever the current mode in any tab changes. The initial entering of the
285 default mode in new tabs also counts as a mode change.
289 - vim: The current [vim object].
292 vimfx.on('modeChange', ({vim}) => {
293 let mode = vimfx.modes[vim.mode].name
294 vim.notify(`Entering mode: ${mode}`)
298 #### The `TabSelect` event
300 Occurs whenever any tab in any window is selected. This is also fired when
301 Firefox starts for the currently selected tab.
305 - event: The `event` object passed to the standard Firefox [TabSelect] event.
307 #### The `modeDisplayChange` event
309 This is basically a combination of the `modeChange` and the `TabSelect` events.
310 The event is useful for knowing when to update UI showing the current mode.
314 - vim: The current [vim object].
316 (VimFx itself uses this event to update the toolbar [button], by setting
317 `#main-window[vimfx-mode]` to the current mode. You may use this with custom
320 #### The `focusTypeChange` event
322 Occurs when focusing or blurring any element. See also the [`blur_timeout`]
327 - vim: The current [vim object].
329 `data.vim.focusType` has been updated just before this event fires.
331 (VimFx itself uses this event to update the toolbar [button], by setting
332 `#main-window[vimfx-focus-type]` to the current focus type. You may use this
333 with custom [styling].)
335 #### The `shutdown` event
339 - VimFx shuts down: When Firefox shuts down, when VimFx is disabled or when
341 - When the config file is reloaded using the `gC` command.
343 `data`: No data at all is passed.
345 If you care about that things you do in `config.js` and `frame.js` are undone
346 when any of the above happens, read on.
348 If all you do is using the methods of the `vimfx` object, you shouldn’t need to
349 care about this event.
351 The following methods don’t need any undoing:
354 - `vimfx.getDefault(...)`
358 The following methods are automatically undone when the `shutdown` event fires.
359 This means that if you, for example, add a custom command in `config.js` but
360 then remove it from `config.js` and hit `gC`, the custom command will be gone in
364 - `vimfx.addCommand(...)`
365 - `vimfx.addOptionOverrides(...)`
366 - `vimfx.addKeyOverrides(...)`
369 The following require manual undoing:
371 - `vimfx.mode`. Any changes you do here must be manually undone.
373 If you add event listeners in `frame.js`, here’s an example of how to remove
378 vimfx.on('shutdown', () => {
379 Components.classes['@mozilla.org/globalmessagemanager;1']
380 .getService(Components.interfaces.nsIMessageListenerManager)
381 // Send this message to _all_ frame scripts.
382 .broadcastAsyncMessage('VimFx-config:shutdown')
389 function listen(eventName, listener) {
390 addEventListener(eventName, listener, true)
391 listeners.push([eventName, listener])
394 listen('focus', event => {
395 console.log('focused element', event.target)
398 addMessageListener('VimFx-config:shutdown', () => {
399 listeners.forEach(([eventName, listener]) => {
400 removeMessageListener(eventName, listener, true)
407 An object whose keys are mode names and whose values are [mode object]s.
409 This is a very low-level part of the API. It allows to:
411 - Access all commands and run them. This is the most common thing that a config
412 file user needs it for.
415 let {commands} = vimfx.modes.normal
416 // Inside a custom command:
417 commands.tab_new.run(args)
420 - Adding new commands. It is recommended to use the `vimfx.addCommand(...)`
421 helper instead. It’s easier.
424 vimfx.modes.normal.commands.new_command = {
425 pref: 'extensions.my_extension.mode.normal.new_command',
428 description: translate('mode.normal.new_command'),
429 run: args => console.log('New command! args:', args)
433 - Adding new modes. This is the most advanced customization you can do to VimFx.
434 Expect having to read VimFx’s source code to figure it all out.
437 vimfx.modes.new_mode = {
438 name: translate('mode.new_mode'),
443 onInput(args, match) {
444 if (match.type === 'full') {
445 match.command.run(args)
447 return (match.type !== 'none')
452 Have a look at [modes.coffee] and [commands.coffee] for more information.
454 ### `vimfx.get('categories')`
456 An object whose keys are category names and whose values are [category object]s.
459 let categories = vimfx.get('categories')
461 // Add a new category.
462 categories.custom = {
463 name: 'Custom commands',
467 // Swap the order of the Location and Tabs categories.
468 ;[commands.focus_location_bar.order, categories.tabs.order] =
469 [categories.tabs.order, commands.focus_location_bar.order]
472 ### Custom hint commands
474 Apart from the standard hint commands, you can create your own.
476 You may run any VimFx command by using the following pattern:
481 name: 'run_other_command_example',
482 description: 'Run other command example',
484 // Replace 'follow' with any command name here:
485 vimfx.modes.normal.commands.follow.run(args)
489 All hint commands (except `eb`) also support `args.callbackOverride`:
494 name: 'custom_hint_command_example',
495 description: 'Custom hint command example',
497 vimfx.modes.normal.commands.follow.run(Object.assign({}, args, {
498 callbackOverride({type, href, id, timesLeft}) {
499 console.log('Marker data:', {type, href, id, timesLeft})
500 return (timesLeft > 1)
506 This lets you piggy-back on one of the existing hint commands by getting the
507 same hints on screen as that command, but then doing something different with
508 the matched hint marker.
510 `callbackOverride` is called with an object with the following properties:
512 - type: `String`. The type of the element of the matched hint marker. See
513 [`vimfx.setHintMatcher(...)`] for all possible values.
515 - href: `String` or `null`. If `type` is `'link'`, then this is the `href`
516 attribute of the element of the matched hint marker.
518 - id: An id that you can pass to [`vimfx.getMarkerElement(...)`] to get the
519 element of the matched hint marker.
521 - timesLeft: `Number`. Calling a hint command with a count means that you want
522 to run it _count_ times in a row. This number tells how many times there are
523 left to run. If you don’t provide a count, the number is `1`.
525 `callbackOverride` should return `true` if you want the hint markers to
526 re-appear on screen after you’ve matched one of them (as in the `af` command),
527 and `false` if you wish to exit Hints mode. If your command ignores counts,
528 simply always return `false`. Otherwise you most likely want to return
531 Here’s an example which adds a silly command for marking links with
532 color—`http://` links with red and all other links with green.
536 let {commands} = vimfx.modes.normal
540 category: 'browsing',
541 description: 'Mark link with red or green',
544 commands.follow_in_tab.run(Object.assign({}, args, {
545 callbackOverride({type, href, id, timesLeft}) {
547 let color = href.startsWith('http://') ? 'red' : 'green'
548 vimfx.send(vim, 'highlight_marker_element', {id, color})
558 vimfx.listen('highlight_marker_element', ({id, color}) => {
559 let element = vimfx.getMarkerElement(id)
561 element.style.backgroundColor = color
568 A mode is an object with the following properties:
570 - name: `String`. A human readable name of the mode used in the Keyboard
571 Shortcuts help dialog and VimFx’s options page in the Add-ons Manager. Config
572 file users adding custom modes could simply use a hard-coded string; extension
573 authors are encouraged to look up the name from a locale file.
574 - order: `Number`. The first of the default modes has the order `100` and then
575 they increase by `100` per mode. This allows to put new modes between two
576 already existing ones.
577 - commands: `Object`. The keys are command names and the values are [command
579 - onEnter(data, ...args): `Function`. Called when the mode is entered.
580 - onLeave(data): `Function`. Called when the mode is left.
581 - onInput(data, match): `Function`. Called when a key is pressed.
583 #### onEnter, onLeave and onInput
585 These methods are called with an object (called `data` above) with the following
588 - vim: The current [vim object].
589 - storage: An object unique to the current [vim object] and to the current mode.
590 Allows to share things between commands of the same mode by getting and
595 This method is called with an object as mentioned above, and after that there
596 may be any number of arguments that the mode is free to do whatever it wants
601 The object passed to this method (see above) also has the following properties:
603 - uiEvent: `Event` or `false`. The keydown event object if the event occurred in
604 the browser UI, `false` otherwise (if the event occurred in web page content).
605 - count: `Number`. The count for the command. `undefined` if no count. (This is
606 simply a copy of `match.count`. `match` is defined below.)
608 The above object should be passed to commands when running them. The mode is
609 free to do whatever it wants with the return value (if any) of the commands it
612 It also receives a [match object] as the second argument.
614 `onInput` should return `true` if the current keypress should not be passed on
615 to the browser and web pages, and `false` otherwise.
619 A category is an object with the following properties:
621 - name: `String`. A human readable name of the category used in the Keyboard
622 Shortcuts help dialog and VimFx’s options page in the Add-ons Manager. Config
623 file users adding custom categories could simply a use hard-coded string;
624 extension authors are encouraged to look up the name from a locale file.
625 - order: `Number`. The first of the default categories is the “uncategorized”
626 category. It has the order `100` and then they increase by `100` per category.
627 This allows to put new categories between two already existing ones.
631 A command is an object with the following properties:
633 - pref: `String`. The option name (preference key) used to store the shortcuts
635 - run(args): `Function`. Called when the command is activated.
636 - description: `String`. A description of the command, shown in the Keyboard
637 Shortcuts help dialog and VimFx’s options page in the Add-ons Manager. Config
638 file users adding custom commands could simply use a hard-coded string;
639 extension authors are encouraged to look up the name from a locale file.
640 - category: `String`. The category to add the command to. The value has to be
641 one of the keys of [`vimfx.get('categories')`][categories].
642 - order: `Number`. The first of the default commands has the order `100` and
643 then they increase by `100` per command. This allows to put new commands
644 between two already existing ones.
648 A `match` object has the following properties:
650 - type: `String`. It has one of the following values:
652 - `'full'`: The current keypress, together with previous keypresses, fully
653 matches a command shortcut.
654 - `'partial'`: The current keypress, together with previous keypresses,
655 partially matches a command shortcut.
656 - `'count'`: The current keypress is not part of a command shortcut, but is a
657 digit and contributes to the count of a future matched command.
658 - `'none'`: The current keypress is not part of a command shortcut and does
659 not contribute to a count.
661 - likelyConflict: `Boolean`. This is `true` if the current keypress is likely to
662 cause conflicts with default Firefox behavior of that key, and `false`
663 otherwise. A mode might not want to run commands and suppress the event if
664 this value is `true`. VimFx uses the current keypress and `vim.focusType` of
665 the current [vim object] to decide if the current keypress is a likely
668 1. If the key is part of the tail of a shortcut, it is never a conflict.
669 2. If `vim.focusType` is `'activatable'` or `'adjustable'` and the key is
670 present in [`activatable_element_keys`] or [`adjustable_element_keys`]
671 (respectively), then it is a likely conflict.
672 3. Finally, unless `vim.focusType` is `'none'`, then it is a likely conflict.
673 This most commonly means that a text input is focused.
675 Note that any VimFx shortcut starting with a keypress involving a modifier is
676 _very_ likely to conflict with either a Firefox default shortcut or a shortcut
677 from some other add-on. This is _not_ attempted to be detected in any way.
678 Instead, VimFx uses no modifiers in any default Normal mode shortcuts, leaving
679 it up to you to choose modifier-shortcuts that work out for you if you want
680 such shortcuts. In other words, for modifier-shortcuts the point of VimFx _is_
681 to conflict (overriding default shortcuts).
683 - command: `null` unless `type` is `'full'`. Then it is the matched command (a
686 The matched command should usually be run at this point. It is suitable to
687 pass on the object passed to [onInput] to the command. Some modes might choose
688 to add extra properties to the object first. (That is favored over passing
689 several arguments, since it makes it easier for the command to in turn pass
690 the same data it got on to another command, if needed.)
692 Usually the return value of the command isn’t used, but that’s up to the mode.
694 - count: `Number`. The count for the command. `undefined` if no count.
696 - specialKeys: `Object`. The keys may be any of the following:
701 If a key exists, its value is always `true`. The keys that exist indicate the
702 [special keys] for the sequence used for the matched command (if any).
704 - keyStr: `String`. The current keypress represented as a string.
706 - unmodifiedKey: `String`. `keyStr` without modifiers.
708 - rawKey: `String`. Unchanged [`event.key`].
710 - rawCode: `String`. Unchanged [`event.code`].
712 - toplevel: `Boolean`. Whether or not the match was a toplevel match in the
713 shortcut key tree. This is `true` unless the match is part of the tail of a
716 - discard(): `Function`. Discards keys pressed so far: If `type` is `'partial'`
717 or `'count'`. For example, if you have typed `12g`, run `match.discard()` and
718 then press `$`, the `$` command will be run instead of `12g$`.
722 There is one `vim` object per tab.
724 A `vim` object has the following properties:
726 - window: [`Window`]. The current Firefox window object. Most commands
727 interacting with Firefox’s UI use this.
729 - browser: [`Browser`]. The `browser` that this vim object handles.
731 - options: `Object`. Provides access to all of VimFx’s options. It is an
734 - mode: `String`. The current mode name.
736 - focusType: `String`. The type of currently focused element. VimFx decides the
737 type based on how it responds to keystorkes. It has one of the following
740 - `'ignore'`: Some kind of Vim-style editor. VimFx automatically
741 enters Ignore mode when this focus type is encountered.
742 - `'editable'`: Some kind of text input, a `<select>` element or a
743 “contenteditable” element.
744 - `'activatable'`: An “activatable” element (link or button).
745 (See also the [`activatable_element_keys`] option.)
746 - `'adjustable'`: An “adjustable” element (form control or video
747 player). (See also the [`adjustable_element_keys`] option.)
748 - `'findbar'`: The findbar text input is focused.
749 - `'none'`: The currently focused element does not appear to respond to
750 keystrokes in any special way.
752 [The `focusTypeChange` event] is fired whenever `focusType` is updated.
754 `match.likelyConflict` of [match object]s depend on `focusType`.
756 - isUIEvent(event): `Function`. Returns `true` if `event` occurred in the
757 browser UI, and `false` otherwise (if it occurred in web page content).
759 - notify(message): `Function`. Display a notification with the text `message`.
761 - hideNotification(): `Function`. Hide the current notification (if any).
763 - markPageInteraction(value=true): `Function`. When `value` is `true` (as it is
764 by default when the argument is omitted), marks that the user has interacted
765 with the page. After that [autofocus prevention] is not done anymore. Commands
766 interacting with web page content might want to do this. If `value` is
767 `false`, the state is reset and autofocus prevention _will_ be done again.
769 **Warning:** There are also properties starting with an underscore on `vim`
770 objects. They are private, and not supposed to be used outside of VimFx’s own
771 source code. They may change at any time.
775 An `options` object provides access to all of VimFx’s options. It is an object
776 whose keys are VimFx option names.
778 Note that the values are not just simply `vimfx.get(option)` for the `option` in
779 question; they are _parsed_ (`parse(vimfx.get(option))`):
781 - Space-separated options are parsed into arrays of strings. For example,
782 `pattern_attrs: ['class']`.
784 - `blacklist`, `prev_patterns` and `next_patterns` are parsed into arrays of
785 regular expressions. For example, `prev_patterns: [/\bnavPrev\b/]`.
787 (See [parse-prefs.coffee] for all details.)
789 Any [option overrides] are automatically taken into account when getting an
792 The [special options] are also available on this object.
797 A location object is very similar to [`window.location`] in web pages.
798 Technically, it is a [`URL`] instance. You can experiment with the current
799 location object by opening the [web console] and entering `location`.
804 In `frame.js`, the following API is available as the variable `vimfx`.
806 ### `vimfx.listen(message, listener)`
808 Listen for `message` (a string) from `config.js`. `listener` will be called with
809 the data sent from `config.js` (if any), and optionally a callback function if
810 `config.js` wants you to respond. If so, call the callback function, optionally
811 with some data to send back to `config.js.` `config.js` uses its
812 [`vimfx.send(...)`] method to send `message` (and optionally some data along
815 See the [`vimfx.send(...)`] method in `config.js` for more information and
818 ### `vimfx.setHintMatcher(hintMatcher)`
820 `hintMatcher` is a function that lets you customize which elements do and don’t
821 get hints. It might help to read about [the hint commands] first.
823 If you call `vimfx.setHintMatcher(hintMatcher)` more than once, only the
824 `hintMatcher` provided the last time will be used.
827 vimfx.setHintMatcher((id, element, type) => {
828 // Inspect `element` and return a different `type` if needed.
833 The arguments passed to the `hintMatcher` function are:
835 - id: `String`. A string identifying which command is used:
837 - `'normal'`: `f` or `af`.
838 - `'tab'`: `F`, `et`, `ew` or `ep`.
842 - `'select'`: `v`, `av` or `yv`.
844 - element: `Element`. One out of all elements currently inside the viewport.
846 - type: `String` or `null`. If a string, it means that `element` should get a
847 hint. If `null`, it won’t. See the available strings below. When a marker
848 is matched, `type` decides what happens to `element`.
850 This parameter tells how VimFx has matched `element`. You have the opportunity
853 The available type strings depend on `id`:
857 - link: A “proper” link (not used as a button with the help of JavaScript),
858 with an `href` attribute.
859 - text: An element that can you can type in, such as text inputs.
860 - clickable: Some clickable element not falling into another category.
861 - clickable-special: Like “clickable,” but uses a different technique to
862 simulate a click on the element. If “clickable” doesn’t work, try this one.
863 - scrollable: A scrollable element.
867 - link: Like “link” when `id` is “normal” (see above).
871 - link: Like “link” when `id` is “normal” (see above).
872 - text: Like “text” when `id` is “normal” (see above), except that in this
873 case “contenteditable” elements are not included.
874 - contenteditable: Elements with “contenteditable” turned on.
878 - focusable: Any focusable element not falling into another category.
879 - scrollable: Like “scrollable” when `id` is “normal” (see above).
883 - context: An element that can have a context menu opened.
887 - selectable: An element with selectable text (but not text inputs).
889 The function must return `null` or a string like the `type` parameter.
891 ### `vimfx.getMarkerElement(id)`
893 Takes an id that has been given to you when creating [custom hint commands] and
894 returns the DOM element associated with that id. If no element can be found,
900 The API is currently **experimental** and therefore **unstable.** Things might
901 break with new VimFx versions. However, no breaking changes are planned, and
902 will be avoided if feasible.
904 As soon as VimFx 1.0.0 (which does not seem to be too far away) is released
905 backwards compatibility will be a priority and won’t be broken until VimFx
908 [option overrides]: #vimfxaddoptionoverridesrules
909 [`vimfx.send(...)`]: #vimfxsendvim-message-data--null-callback--null
910 [`vimfx.listen(...)`]: #vimfxlistenmessage-listener
911 [categories]: #vimfxgetcategories
912 [custom hint commands]: #custom-hints-commands
913 [`vimfx.modes`]: #vimfxmodes
915 [mode object]: #mode-object
916 [category object]: #category-object
917 [command object]: #command-object
918 [match object]: #match-object
919 [vim object]: #vim-object
920 [options object]: #options-object
921 [location object]: #location-object
922 [The `focusTypeChange` event]: #the-focustypechange-event
923 [the `shutdown` event]: #the-shutdown-event
924 [`vimfx.setHintMatcher(...)`]: #vimfxsethintmatcherhintmatcher
925 [`vimfx.getMarkerElement(...)`]: #vimfxgetmarkerelementid
927 [blacklisted]: options.md#blacklist
928 [special options]: options.md#special-options
929 [config file]: config-file.md
930 [bootstrap.js]: config-file.md#bootstrapjs
931 [autofocus prevention]: options.md#prevent-autofocus
932 [`activatable_element_keys`]: options.md#activatable_element_keys
933 [`adjustable_element_keys`]: options.md#adjustable_element_keys
934 [`blur_timeout`]: options.md#blur_timeout
935 [`notifications_enabled`]: options.md#notifications_enabled
938 [the hint commands]: commands.md#the-hint-commands--hints-mode
939 [special keys]: shortcuts.md#special-keys
940 [styling]: styling.md
942 [defaults.coffee]: ../extension/lib/defaults.coffee
943 [parse-prefs.coffee]: ../extension/lib/parse-prefs.coffee
944 [modes.coffee]: ../extension/lib/modes.coffee
945 [commands.coffee]: ../extension/lib/commands.coffee
946 [vim.coffee]: ../extension/lib/vim.coffee
948 [`event.key`]: https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent/key
949 [`event.code`]: https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent/code
950 [`Window`]: https://developer.mozilla.org/en-US/docs/Web/API/Window
951 [`Browser`]: https://developer.mozilla.org/en-US/docs/Mozilla/Tech/XUL/browser
952 [`window.location`]: https://developer.mozilla.org/en-US/docs/Web/API/Location
953 [`URL`]: https://developer.mozilla.org/en-US/docs/Web/API/URL
954 [Message Manager]: https://developer.mozilla.org/en-US/Firefox/Multiprocess_Firefox/Message_Manager
955 [TabSelect]: https://developer.mozilla.org/en-US/docs/Web/Events/TabSelect
956 [web console]: https://developer.mozilla.org/en-US/docs/Tools/Web_Console
957 [about:config]: http://kb.mozillazine.org/About:config