2 # Copyright Anton Khodakivskiy 2012, 2013, 2014.
3 # Copyright Simon Lydell 2013, 2014, 2015, 2016.
4 # Copyright Wang Zhuochun 2013.
6 # This file is part of VimFx.
8 # VimFx is free software: you can redistribute it and/or modify
9 # it under the terms of the GNU General Public License as published by
10 # the Free Software Foundation, either version 3 of the License, or
11 # (at your option) any later version.
13 # VimFx is distributed in the hope that it will be useful,
14 # but WITHOUT ANY WARRANTY; without even the implied warranty of
15 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 # GNU General Public License for more details.
18 # You should have received a copy of the GNU General Public License
19 # along with VimFx. If not, see <http://www.gnu.org/licenses/>.
22 # This file contains lots of different helper functions.
24 nsIClipboardHelper = Cc['@mozilla.org/widget/clipboardhelper;1']
25 .getService(Ci.nsIClipboardHelper)
26 nsIDomUtils = Cc['@mozilla.org/inspector/dom-utils;1']
27 .getService(Ci.inIDOMUtils)
28 nsIEventListenerService = Cc['@mozilla.org/eventlistenerservice;1']
29 .getService(Ci.nsIEventListenerService)
30 nsIFocusManager = Cc['@mozilla.org/focus-manager;1']
31 .getService(Ci.nsIFocusManager)
32 nsIStyleSheetService = Cc['@mozilla.org/content/style-sheet-service;1']
33 .getService(Ci.nsIStyleSheetService)
34 nsIWindowMediator = Cc['@mozilla.org/appshell/window-mediator;1']
35 .getService(Ci.nsIWindowMediator)
37 HTMLAnchorElement = Ci.nsIDOMHTMLAnchorElement
38 HTMLButtonElement = Ci.nsIDOMHTMLButtonElement
39 HTMLInputElement = Ci.nsIDOMHTMLInputElement
40 HTMLTextAreaElement = Ci.nsIDOMHTMLTextAreaElement
41 HTMLSelectElement = Ci.nsIDOMHTMLSelectElement
42 HTMLBodyElement = Ci.nsIDOMHTMLBodyElement
43 XULDocument = Ci.nsIDOMXULDocument
44 XULButtonElement = Ci.nsIDOMXULButtonElement
45 XULControlElement = Ci.nsIDOMXULControlElement
46 XULMenuListElement = Ci.nsIDOMXULMenuListElement
47 XULTextBoxElement = Ci.nsIDOMXULTextBoxElement
49 # Full chains of events for different mouse actions. ('command' is for XUL
51 EVENTS_CLICK = ['mousedown', 'mouseup', 'click', 'command']
52 EVENTS_HOVER_START = ['mouseover', 'mouseenter', 'mousemove']
53 EVENTS_HOVER_END = ['mouseout', 'mouseleave']
57 # Element classification helpers
59 isActivatable = (element) ->
60 return element instanceof HTMLAnchorElement or
61 element instanceof HTMLButtonElement or
62 (element instanceof HTMLInputElement and element.type in [
63 'button', 'submit', 'reset', 'image'
65 element instanceof XULButtonElement
67 isAdjustable = (element) ->
68 return element instanceof HTMLInputElement and element.type in [
69 'checkbox', 'radio', 'file', 'color'
70 'date', 'time', 'datetime', 'datetime-local', 'month', 'week'
72 element instanceof XULControlElement or
73 # Youtube special case.
74 element.classList?.contains('html5-video-player') or
75 element.classList?.contains('ytp-button')
77 isContentEditable = (element) ->
78 return element.isContentEditable or
79 isIframeEditor(element) or
81 element.getAttribute?('g_editable') == 'true' or
82 element.ownerDocument?.body?.getAttribute('g_editable') == 'true'
84 isIframeEditor = (element) ->
85 return false unless element instanceof HTMLBodyElement
88 element.id == 'innerdocbody' or
90 (element.classList.contains('xe_content') and
91 element.classList.contains('editable')) or
93 element.classList.contains('wysiwyg')
95 isProperLink = (element) ->
96 # `.getAttribute` is used below instead of `.hasAttribute` to exclude `<a
97 # href="">`s used as buttons on some sites.
98 return element.getAttribute('href') and
99 (element instanceof HTMLAnchorElement or
100 element.ownerDocument instanceof XULDocument) and
101 not element.href.endsWith('#') and
102 not element.href.endsWith('#?') and
103 not element.href.startsWith('javascript:')
105 isTextInputElement = (element) ->
106 return (element instanceof HTMLInputElement and element.type in [
107 'text', 'search', 'tel', 'url', 'email', 'password', 'number'
109 element instanceof HTMLTextAreaElement or
110 element instanceof XULTextBoxElement or
111 isContentEditable(element)
113 isTypingElement = (element) ->
114 return isTextInputElement(element) or
115 # `<select>` elements can also receive text input: You may type the
116 # text of an item to select it.
117 element instanceof HTMLSelectElement or
118 element instanceof XULMenuListElement
122 # Active/focused element helpers
124 # NOTE: In frame scripts, `document.activeElement` may be `null` when the page
125 # is loading. Therefore always check if anything was returned, such as:
127 # return unless activeElement = utils.getActiveElement(window)
128 getActiveElement = (window) ->
129 {activeElement} = window.document
130 return null unless activeElement
131 # If the active element is a frame, recurse into it. The easiest way to detect
132 # a frame that works both in browser UI and in web page content is to check
133 # for the presence of `.contentWindow`. However, in non-multi-process
134 # `<browser>` (sometimes `<xul:browser>`) elements have a `.contentWindow`
135 # pointing to the web page content `window`, which we don’t want to recurse
136 # into. `.localName` is `.nodeName` without `xul:` (if it exists). This seems
137 # to be the only way to detect such elements.
138 if activeElement.localName != 'browser' and activeElement.contentWindow
139 return getActiveElement(activeElement.contentWindow)
143 blurActiveElement = (window) ->
144 # Blurring a frame element also blurs any active elements inside it. Recursing
145 # into the frames and blurring the “real” active element directly would give
146 # focus to the `<body>` of its containing frame, while blurring the top-most
147 # frame gives focus to the top-most `<body>`. This allows to blur fancy text
148 # editors which use an `<iframe>` as their text area.
149 window.document.activeElement?.blur()
151 blurActiveBrowserElement = (vim) ->
152 # - Blurring in the next tick allows to pass `<escape>` to the location bar to
153 # reset it, for example.
154 # - Focusing the current browser afterwards allows to pass `<escape>` as well
155 # as unbound keys to the page. However, focusing the browser also triggers
156 # focus events on `document` and `window` in the current page. Many pages
157 # re-focus some text input on those events, making it impossible to blur
158 # those! Therefore we tell the frame script to suppress those events.
160 activeElement = getActiveElement(window)
161 vim._send('browserRefocus')
164 window.gBrowser.selectedBrowser.focus()
167 # Focus an element and tell Firefox that the focus happened because of a user
168 # action (not just because some random programmatic focus). `.FLAG_BYKEY` might
169 # look more appropriate, but it unconditionally selects all text, which
170 # `.FLAG_BYMOUSE` does not.
171 focusElement = (element, options = {}) ->
172 nsIFocusManager.setFocus(element, options.flag ? 'FLAG_BYMOUSE')
173 element.select?() if options.select
175 getFocusType = (element) -> switch
176 when isTypingElement(element)
178 when isActivatable(element)
180 when isAdjustable(element)
189 listen = (element, eventName, listener, useCapture = true) ->
190 element.addEventListener(eventName, listener, useCapture)
192 element.removeEventListener(eventName, listener, useCapture)
195 listenOnce = (element, eventName, listener, useCapture = true) ->
198 element.removeEventListener(eventName, fn, useCapture)
199 listen(element, eventName, fn, useCapture)
201 onRemoved = (window, element, fn) ->
202 mutationObserver = new window.MutationObserver((changes) ->
203 for change in changes then for removedElement in change.removedNodes
204 if removedElement == element
205 mutationObserver.disconnect()
209 mutationObserver.observe(element.parentNode, {childList: true})
210 module.onShutdown(mutationObserver.disconnect.bind(mutationObserver))
212 suppressEvent = (event) ->
213 event.preventDefault()
214 event.stopPropagation()
216 simulateMouseEvents = (element, sequenceType) ->
217 window = element.ownerGlobal
218 rect = element.getBoundingClientRect()
220 eventSequence = switch sequenceType
221 when 'click' then EVENTS_CLICK
222 when 'hover-start' then EVENTS_HOVER_START
223 when 'hover-end' then EVENTS_HOVER_END
225 for type in eventSequence
226 mouseEvent = new window.MouseEvent(type, {
227 # Let the event bubble in order to trigger delegated event listeners.
228 bubbles: type not in ['mouseenter', 'mouseleave']
229 # Make the event cancelable so that `<a href="#">` can be used as a
230 # JavaScript-powered button without scrolling to the top of the page.
231 cancelable: type not in ['mouseenter', 'mouseleave']
232 # These properties are just here for mimicing a real click as much as
234 buttons: if type in EVENTS_CLICK then 1 else 0
235 detail: if type in EVENTS_CLICK then 1 else 0
237 # `page{X,Y}` are set automatically to the correct values when setting
238 # `client{X,Y}`. `{offset,layer,movement}{X,Y}` are not worth the trouble
242 # To exactly calculate `screen{X,Y}` one has to to check where the web
243 # page content area is inside the browser chrome and go through all parent
244 # frames as well. This is good enough. YAGNI for now.
245 screenX: window.screenX + rect.left
246 screenY: window.screenY + rect.top
248 element.dispatchEvent(mouseEvent)
257 return element.clientWidth * element.clientHeight
259 containsDeep = (parent, element) ->
260 parentWindow = parent.ownerGlobal
261 elementWindow = element.ownerGlobal
263 # Owner windows might be missing when opening the devtools.
264 while elementWindow and parentWindow and
265 elementWindow != parentWindow and elementWindow.top != elementWindow
266 element = elementWindow.frameElement
267 elementWindow = element.ownerGlobal
269 return parent.contains(element)
271 createBox = (document, className = '', parent = null, text = null) ->
272 box = document.createElement('box')
273 box.className = "#{className} vimfx-box"
274 box.textContent = text if text?
275 parent.appendChild(box) if parent?
278 injectTemporaryPopup = (document, contents) ->
279 popup = document.createElement('menupopup')
280 popup.appendChild(contents)
281 document.getElementById('mainPopupSet').appendChild(popup)
282 listenOnce(popup, 'popuphidden', popup.remove.bind(popup))
285 insertText = (input, value) ->
286 {selectionStart, selectionEnd} = input
288 input.value[0...selectionStart] + value + input.value[selectionEnd..]
289 input.selectionStart = input.selectionEnd = selectionStart + value.length
291 querySelectorAllDeep = (window, selector) ->
292 elements = Array.from(window.document.querySelectorAll(selector))
293 for frame in window.frames
294 elements.push(querySelectorAllDeep(frame, selector)...)
297 scroll = (element, args) ->
298 {method, type, directions, amounts, properties, adjustment, smooth} = args
300 for direction, index in directions
301 amount = amounts[index]
302 options[direction] = -Math.sign(amount) * adjustment + switch type
303 when 'lines' then amount
304 when 'pages' then amount * element[properties[index]]
305 when 'other' then Math.min(amount, element[properties[index]])
306 options.behavior = 'smooth' if smooth
307 element[method](options)
309 setAttributes = (element, attributes) ->
310 for attribute, value of attributes
311 element.setAttribute(attribute, value)
314 setHover = (element, hover) ->
315 method = if hover then 'addPseudoClassLock' else 'removePseudoClassLock'
316 while element.parentElement
317 nsIDomUtils[method](element, ':hover')
318 element = element.parentElement
326 constructor: ({start: @value = 0, @step = 1}) ->
327 tick: -> @value += @step
333 on: (event, listener) ->
334 (@listeners[event] ?= []).push(listener)
336 emit: (event, data) ->
337 for listener in @listeners[event] ? []
341 has = (obj, prop) -> Object::hasOwnProperty.call(obj, prop)
343 # Check if `search` exists in `string` (case insensitively). Returns `false` if
344 # `string` doesn’t exist or isn’t a string, such as `<SVG element>.className`.
345 includes = (string, search) ->
346 return false unless typeof string == 'string'
347 return string.toLowerCase().includes(search)
350 nextTick = (window, fn) -> window.setTimeout(fn, 0)
352 regexEscape = (s) -> s.replace(/[|\\{}()[\]^$+*?.]/g, '\\$&')
354 removeDuplicates = (array) -> Array.from(new Set(array))
356 # Remove duplicate characters from string (case insensitive).
357 removeDuplicateCharacters = (str) ->
358 return removeDuplicates( str.toLowerCase().split('') ).join('')
360 # Calls `fn` repeatedly, with at least `interval` ms between each call.
361 setInterval = (window, interval, fn) ->
363 currentIntervalId = null
366 currentIntervalId = window.setTimeout((-> fn(next)), interval)
369 window.clearTimeout(currentIntervalId)
377 formatError = (error) ->
378 stack = String(error.stack?.formattedStack ? error.stack ? '')
380 .filter((line) -> line.includes('.xpi!'))
381 .map((line) -> ' ' + line.replace(/(?:\/<)*@.+\.xpi!/g, '@'))
383 return "#{error}\n#{stack}"
385 getCurrentLocation = ->
386 window = getCurrentWindow()
387 return new window.URL(window.gBrowser.selectedBrowser.currentURI.spec)
389 getCurrentWindow = -> nsIWindowMediator.getMostRecentWindow('navigator:browser')
391 hasEventListeners = (element, type) ->
392 for listener in nsIEventListenerService.getListenerInfoFor(element)
393 if listener.listenerObject and listener.type == type
398 uri = Services.io.newURI("#{ADDON_PATH}/skin/#{name}.css", null, null)
399 method = nsIStyleSheetService.AUTHOR_SHEET
400 unless nsIStyleSheetService.sheetRegistered(uri, method)
401 nsIStyleSheetService.loadAndRegisterSheet(uri, method)
403 nsIStyleSheetService.unregisterSheet(uri, method)
406 observe = (topic, observer) ->
407 observer = {observe: observer} if typeof observer == 'function'
408 Services.obs.addObserver(observer, topic, false)
410 Services.obs.removeObserver(observer, topic, false)
413 openPopup = (popup) ->
414 window = popup.ownerGlobal
415 # Show the popup so it gets a height and width.
416 popup.openPopupAtScreen(0, 0)
417 # Center the popup inside the window.
419 window.screenX + window.outerWidth / 2 - popup.clientWidth / 2,
420 window.screenY + window.outerHeight / 2 - popup.clientHeight / 2
423 openTab = (window, url, options) ->
425 window.TreeStyleTabService?.readyToOpenChildTab(gBrowser.selectedTab)
426 gBrowser.loadOneTab(url, options)
428 writeToClipboard = (text) -> nsIClipboardHelper.copyString(text)
442 blurActiveBrowserElement
469 removeDuplicateCharacters