2 # Copyright Simon Lydell 2015, 2016.
4 # This file is part of VimFx.
6 # VimFx is free software: you can redistribute it and/or modify
7 # it under the terms of the GNU General Public License as published by
8 # the Free Software Foundation, either version 3 of the License, or
9 # (at your option) any later version.
11 # VimFx is distributed in the hope that it will be useful,
12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 # GNU General Public License for more details.
16 # You should have received a copy of the GNU General Public License
17 # along with VimFx. If not, see <http://www.gnu.org/licenses/>.
20 # This file is the equivalent to commands.coffee, but for frame scripts,
21 # allowing interaction with web page content. Most “commands” here have the
22 # same name as the command in commands.coffee that calls it. There are also a
23 # few more generalized “commands” used in more than one place.
25 hints = require('./hints')
26 translate = require('./l10n')
27 utils = require('./utils')
29 {isProperLink, isTextInputElement, isTypingElement, isContentEditable} = utils
31 XULDocument = Ci.nsIDOMXULDocument
33 # <http://www.w3.org/html/wg/drafts/html/master/dom.html#wai-aria>
34 CLICKABLE_ARIA_ROLES = [
35 'link', 'button', 'tab'
36 'checkbox', 'radio', 'combobox', 'option', 'slider', 'textbox'
37 'menuitem', 'menuitemcheckbox', 'menuitemradio'
42 commands.go_up_path = ({vim, count = 1}) ->
43 {pathname} = vim.content.location
44 newPathname = pathname.replace(/// (?: /[^/]+ ){1,#{count}} /?$ ///, '')
45 if newPathname == pathname
46 vim.notify(translate('notification.go_up_path.limit'))
48 vim.content.location.pathname = newPathname
50 commands.go_to_root = ({vim}) ->
51 # `.origin` is `'null'` (as a string) on `about:` pages.
52 if "#{vim.content.location.origin}/" in [vim.content.location.href, 'null/']
53 vim.notify(translate('notification.go_up_path.limit'))
55 vim.content.location.href = vim.content.location.origin
57 commands.scroll = (args) ->
59 return unless activeElement = utils.getActiveElement(vim.content)
61 # If no element is focused on the page, the the active element is the
62 # topmost `<body>`, and blurring it is a no-op. If it is scrollable, it
63 # means that you can’t blur it in order to scroll `<html>`. Therefore it may
64 # only be scrolled if it has been explicitly focused.
65 if vim.state.scrollableElements.has(activeElement) and
66 (activeElement != vim.content.document.body or
67 vim.state.explicitBodyFocus)
70 vim.state.scrollableElements.filterSuitableDefault()
71 utils.scroll(element, args)
73 commands.mark_scroll_position = ({vim, keyStr, notify = true}) ->
74 element = vim.state.scrollableElements.filterSuitableDefault()
75 vim.state.marks[keyStr] = [element.scrollTop, element.scrollLeft]
77 vim.notify(translate('notification.mark_scroll_position.success', keyStr))
79 commands.scroll_to_mark = (args) ->
80 {vim, amounts: keyStr} = args
81 unless keyStr of vim.state.marks
82 vim.notify(translate('notification.scroll_to_mark.none', keyStr))
85 args.amounts = vim.state.marks[keyStr]
86 element = vim.state.scrollableElements.filterSuitableDefault()
87 utils.scroll(element, args)
89 helper_follow = ({id, combine = true}, matcher, {vim}) ->
91 vim.state.markerElements = []
93 filter = (element, getElementShape) ->
94 {type, semantic} = matcher({vim, element, getElementShape})
97 {type, semantic} = vim.hintMatcher(id, element, {type, semantic})
100 shape = getElementShape(element)
102 # CodeMirror editor uses a tiny hidden textarea positioned at the caret.
103 # Targeting those are the only reliable way of focusing CodeMirror editors,
104 # and doing so without moving the caret.
105 if not shape and id == 'normal' and element.nodeName == 'TEXTAREA' and
106 element.ownerGlobal == vim.content
107 rect = element.getBoundingClientRect()
108 # Use `.clientWidth` instead of `rect.width` because the latter includes
109 # the width of the borders of the textarea, which are unreliable.
110 if element.clientWidth == 1 and rect.height > 0
114 y: rect.top + rect.height / 2
115 offset: {left: 0, top: 0}
117 area: rect.width * rect.height
122 originalRect = element.getBoundingClientRect()
123 length = vim.state.markerElements.push({element, originalRect})
124 wrapper = {type, semantic, shape, elementIndex: length - 1}
126 if wrapper.type == 'link'
130 # Combine links with the same href.
131 if combine and wrapper.type == 'link' and
132 # If the element has an 'onclick' attribute we cannot be sure that all
133 # links with this href actually do the same thing. On some pages, such
134 # as startpage.com, actual proper links have the 'onclick' attribute,
135 # so we can’t exclude such links in `utils.isProperLink`.
136 not element.hasAttribute?('onclick') and
137 # GitHub’s diff expansion buttons are links with both `href` and
138 # `data-url`. They are JavaScript-powered using the latter attribute.
139 not element.hasAttribute?('data-url')
142 wrapper.parentIndex = parent.elementIndex
143 parent.shape.area += wrapper.shape.area
144 parent.numChildren += 1
146 wrapper.numChildren = 0
147 hrefs[href] = wrapper
151 return hints.getMarkableElementsAndViewport(vim.content, filter)
153 commands.follow = helper_follow.bind(null, {id: 'normal'},
154 ({vim, element, getElementShape}) ->
155 document = element.ownerDocument
156 isXUL = (document instanceof XULDocument)
160 # Bootstrap. Match these before regular links, because especially slider
161 # “buttons” often get the same hint otherwise.
162 when element.hasAttribute?('data-toggle') or
163 element.hasAttribute?('data-dismiss') or
164 element.hasAttribute?('data-slide') or
165 element.hasAttribute?('data-slide-to')
166 # Some elements may not be semantic, but _should be_ and still deserve a
169 when isProperLink(element)
171 when isTypingElement(element)
173 when element.getAttribute?('role') in CLICKABLE_ARIA_ROLES or
174 # <http://www.w3.org/TR/wai-aria/states_and_properties>
175 element.hasAttribute?('aria-controls') or
176 element.hasAttribute?('aria-pressed') or
177 element.hasAttribute?('aria-checked') or
178 (element.hasAttribute?('aria-haspopup') and
179 element.getAttribute?('role') != 'menu')
181 when element.tabIndex > -1 and
182 # Google Drive Documents. The hint for this element would cover the
183 # real hint that allows you to focus the document to start typing.
184 element.id != 'docs-editor' and
185 not (isXUL and element.localName?.endsWith?('box') and
186 element.localName != 'checkbox')
188 unless isXUL or element.localName in ['a', 'input', 'button']
190 when element != vim.state.scrollableElements.largest and
191 vim.state.scrollableElements.has(element)
193 when element.hasAttribute?('onclick') or
194 element.hasAttribute?('onmousedown') or
195 element.hasAttribute?('onmouseup') or
196 element.hasAttribute?('oncommand') or
198 element.classList?.contains('js-new-tweets-bar') or
200 element.hasAttribute?('data-app-action') or
201 element.hasAttribute?('data-uri') or
202 element.hasAttribute?('data-page-action') or
203 # Google Drive Document.
204 element.classList?.contains('kix-appview-editor')
207 # Facebook comment fields.
208 when element.parentElement?.classList?.contains('UFIInputContainer')
209 type = 'clickable-special'
210 # Putting markers on `<label>` elements is generally redundant, because
211 # its `<input>` gets one. However, some sites hide the actual `<input>`
212 # but keeps the `<label>` to click, either for styling purposes or to keep
213 # the `<input>` hidden until it is used. In those cases we should add a
214 # marker for the `<label>`.
215 when element.localName == 'label'
218 document.getElementById?(element.htmlFor)
220 element.querySelector?('input, textarea, select')
221 if input and not getElementShape(input)
223 # Last resort checks for elements that might be clickable because of
226 # It is common to listen for clicks on `<html>` or `<body>`. Don’t
227 # waste time on them.
228 element not in [document.documentElement, document.body]) and
229 (utils.includes(element.className, 'button') or
230 utils.includes(element.getAttribute?('aria-label'), 'close') or
231 # Do this last as it’s a potentially expensive check.
232 utils.hasEventListeners(element, 'click'))
233 # Make a quick check for likely clickable descendants, to reduce the
234 # number of false positives. the element might be a “button-wrapper” or
235 # a large element with a click-tracking event listener.
236 unless element.querySelector?('a, button, input, [class*=button]')
239 # When viewing an image it should get a marker to toggle zoom. This is the
240 # most unlikely rule to match, so keep it last.
241 when document.body?.childElementCount == 1 and
242 element.localName == 'img' and
243 (element.classList?.contains('overflowing') or
244 element.classList?.contains('shrinkToFit'))
246 type = null if isXUL and element.classList?.contains('textbox-input')
247 return {type, semantic}
250 commands.follow_in_tab = helper_follow.bind(null, {id: 'tab'},
252 type = if isProperLink(element) then 'link' else null
253 return {type, semantic: true}
256 commands.follow_copy = helper_follow.bind(null, {id: 'copy'},
259 when isProperLink(element)
261 when isContentEditable(element)
263 when isTypingElement(element)
267 return {type, semantic: true}
270 commands.follow_focus = helper_follow.bind(null, {id: 'focus', combine: false},
273 when element.tabIndex > -1
275 when element != vim.state.scrollableElements.largest and
276 vim.state.scrollableElements.has(element)
280 return {type, semantic: true}
283 commands.focus_marker_element = ({vim, elementIndex, options}) ->
284 {element} = vim.state.markerElements[elementIndex]
285 # To be able to focus scrollable elements, `FLAG_BYKEY` _has_ to be used.
286 options.flag = 'FLAG_BYKEY' if vim.state.scrollableElements.has(element)
287 utils.focusElement(element, options)
289 vim.setHover(element)
291 commands.click_marker_element = (args) ->
292 {vim, elementIndex, type, preventTargetBlank} = args
293 {element} = vim.state.markerElements[elementIndex]
294 if element.target == '_blank' and preventTargetBlank
295 targetReset = element.target
297 if type == 'clickable-special'
300 isXUL = (element.ownerDocument instanceof XULDocument)
303 if element.localName == 'tab' then ['mousedown'] else 'click-xul'
306 utils.simulateMouseEvents(element, sequence)
307 element.target = targetReset if targetReset
309 commands.copy_marker_element = ({vim, elementIndex, property}) ->
310 {element} = vim.state.markerElements[elementIndex]
311 utils.writeToClipboard(element[property])
313 commands.follow_pattern = ({vim, type, options}) ->
314 {document} = vim.content
316 # If there’s a `<link rel=prev/next>` element we use that.
317 for link in document.head?.getElementsByTagName('link')
318 # Also support `rel=previous`, just like Google.
319 if type == link.rel.toLowerCase().replace(/^previous$/, 'prev')
320 vim.content.location.href = link.href
323 # Otherwise we look for a link or button on the page that seems to go to the
324 # previous or next page.
325 candidates = document.querySelectorAll(options.pattern_selector)
327 # Note: Earlier patterns should be favored.
330 # Search for the prev/next patterns in the following attributes of the
331 # element. `rel` should be kept as the first attribute, since the standard way
332 # of marking up prev/next links (`rel="prev"` and `rel="next"`) should be
333 # favored. Even though some of these attributes only allow a fixed set of
334 # keywords, we pattern-match them anyways since lots of sites don’t follow the
335 # spec and use the attributes arbitrarily.
336 attrs = options.pattern_attrs
339 # First search in attributes (favoring earlier attributes) as it's likely
340 # that they are more specific than text contexts.
342 for regex in patterns
343 for element in candidates
344 return element if regex.test(element.getAttribute?(attr))
346 # Then search in element contents.
347 for regex in patterns
348 for element in candidates
349 return element if regex.test(element.textContent)
354 utils.simulateMouseEvents(matchingLink, 'click')
355 # When you go to the next page of GitHub’s code search results, the page is
356 # loaded with AJAX. GitHub then annoyingly focuses its search input. This
357 # autofocus cannot be prevented in a reliable way, because the case is
358 # indistinguishable from a button whose job is to focus some text input.
359 # However, in this command we know for sure that we can prevent the next
360 # focus. This must be done _after_ the click has been triggered, since
361 # clicks count as page interactions.
362 vim.markPageInteraction(false)
364 vim.notify(translate("notification.follow_#{type}.none"))
366 commands.focus_text_input = ({vim, count = null}) ->
367 {lastFocusedTextInput} = vim.state
369 if lastFocusedTextInput and utils.isDetached(lastFocusedTextInput)
370 lastFocusedTextInput = null
372 candidates = utils.querySelectorAllDeep(
373 vim.content, 'input, textarea, textbox, [contenteditable]'
375 inputs = Array.filter(candidates, (element) ->
376 return isTextInputElement(element) and utils.area(element) > 0
378 if lastFocusedTextInput and lastFocusedTextInput not in inputs
379 inputs.push(lastFocusedTextInput)
380 inputs.sort((a, b) -> a.tabIndex - b.tabIndex)
382 if inputs.length == 0
383 vim.notify(translate('notification.focus_text_input.none'))
389 when lastFocusedTextInput
390 inputs.indexOf(lastFocusedTextInput) + 1
393 index = Math.min(num, inputs.length) - 1
394 select = (count? or not vim.state.hasFocusedTextInput)
395 utils.focusElement(inputs[index], {select})
396 vim.state.inputs = inputs
398 commands.clear_inputs = ({vim}) ->
399 vim.state.inputs = null
401 commands.move_focus = ({vim, direction}) ->
402 return false unless vim.state.inputs
403 index = vim.state.inputs.indexOf(utils.getActiveElement(vim.content))
404 # If there’s only one input, `<tab>` would cycle to itself, making it feel
405 # like `<tab>` was not working. Then it’s better to let `<tab>` work as it
407 if index == -1 or vim.state.inputs.length <= 1
408 vim.state.inputs = null
412 nextInput = inputs[(index + direction) %% inputs.length]
413 utils.focusElement(nextInput, {select: true})
416 commands.esc = (args) ->
418 commands.blur_active_element(args)
421 {document} = vim.content
422 if document.exitFullscreen
423 document.exitFullscreen()
425 document.mozCancelFullScreen()
427 commands.blur_active_element = ({vim}) ->
428 vim.state.explicitBodyFocus = false
429 utils.blurActiveElement(vim.content)
431 module.exports = commands