2 # Copyright Anton Khodakivskiy 2012, 2013, 2014.
3 # Copyright Simon Lydell 2013, 2014, 2015.
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 HTMLAnchorElement = Ci.nsIDOMHTMLAnchorElement
25 HTMLButtonElement = Ci.nsIDOMHTMLButtonElement
26 HTMLInputElement = Ci.nsIDOMHTMLInputElement
27 HTMLTextAreaElement = Ci.nsIDOMHTMLTextAreaElement
28 HTMLSelectElement = Ci.nsIDOMHTMLSelectElement
29 HTMLFrameElement = Ci.nsIDOMHTMLFrameElement
30 HTMLIFrameElement = Ci.nsIDOMHTMLIFrameElement
31 XULDocument = Ci.nsIDOMXULDocument
32 XULButtonElement = Ci.nsIDOMXULButtonElement
33 XULControlElement = Ci.nsIDOMXULControlElement
34 XULMenuListElement = Ci.nsIDOMXULMenuListElement
35 XULTextBoxElement = Ci.nsIDOMXULTextBoxElement
41 # Element classification helpers
43 isActivatable = (element) ->
44 return element instanceof HTMLAnchorElement or
45 element instanceof HTMLButtonElement or
46 (element instanceof HTMLInputElement and element.type in [
47 'button', 'submit', 'reset', 'image'
49 element instanceof XULButtonElement
51 isAdjustable = (element) ->
52 return element instanceof HTMLInputElement and element.type in [
53 'checkbox', 'radio', 'file', 'color'
54 'date', 'time', 'datetime', 'datetime-local', 'month', 'week'
56 element instanceof XULControlElement or
57 # Youtube special case.
58 element.classList?.contains('html5-video-player') or
59 element.classList?.contains('ytp-button')
61 isContentEditable = (element) ->
62 return element.isContentEditable or
63 # `g_editable` is a non-standard attribute commonly used by Google.
64 element.getAttribute?('g_editable') == 'true' or
65 element.ownerDocument?.body?.getAttribute('g_editable') == 'true'
67 isProperLink = (element) ->
68 # `.getAttribute` is used below instead of `.hasAttribute` to exclude `<a
69 # href="">`s used as buttons on some sites.
70 return element.getAttribute('href') and
71 (element instanceof HTMLAnchorElement or
72 element.ownerDocument instanceof XULDocument) and
73 not element.href.endsWith('#') and
74 not element.href.endsWith('#?') and
75 not element.href.startsWith('javascript:')
77 isTextInputElement = (element) ->
78 return (element instanceof HTMLInputElement and element.type in [
79 'text', 'search', 'tel', 'url', 'email', 'password', 'number'
81 element instanceof HTMLTextAreaElement or
82 # `<select>` elements can also receive text input: You may type the
83 # text of an item to select it.
84 element instanceof HTMLSelectElement or
85 element instanceof XULMenuListElement or
86 element instanceof XULTextBoxElement
90 # Active/focused element helpers
92 getActiveElement = (window) ->
93 { activeElement } = window.document
94 if activeElement instanceof HTMLFrameElement or
95 activeElement instanceof HTMLIFrameElement
96 return getActiveElement(activeElement.contentWindow)
100 blurActiveElement = (window, extraAllowedElements = null) ->
101 # Only blur focusable elements, in order to interfere with the browser as
102 # little as possible.
103 activeElement = getActiveElement(window)
105 (activeElement.tabIndex > -1 or extraAllowedElements?.has(activeElement))
108 blurActiveBrowserElement = (vim) ->
109 # - Some browser UI elements, such as the web console, are not marked as
110 # focusable, so we can’t check if the element is focusable as in
111 # `blurActiveElement`.
112 # - Blurring in the next tick allows to pass `<escape>` to the location bar to
113 # reset it, for example.
114 # - Focusing the current browser afterwards allows to pass `<escape>` as well
115 # as unbound keys to the page. However, focusing the browser also triggers
116 # focus events on `document` and `window` in the current page. Many pages
117 # re-focus some text input on those events, making it impossible to blur
118 # those! Therefore we tell the frame script to suppress those events.
120 activeElement = getActiveElement(window)
121 vim._send('browserRefocus')
124 window.gBrowser.selectedBrowser.focus()
127 # Focus an element and tell Firefox that the focus happened because of a user
128 # keypress (not just because some random programmatic focus).
129 focusElement = (element, options = {}) ->
130 focusManager = Cc['@mozilla.org/focus-manager;1']
131 .getService(Ci.nsIFocusManager)
132 focusManager.setFocus(element, focusManager.FLAG_BYKEY)
133 element.select?() if options.select
135 moveFocus = (direction) ->
136 focusManager = Cc['@mozilla.org/focus-manager;1']
137 .getService(Ci.nsIFocusManager)
140 focusManager.MOVEFOCUS_BACKWARD
142 focusManager.MOVEFOCUS_FORWARD
143 focusManager.moveFocus(
144 null, # Use current window.
145 null, # Move relative to the currently focused element.
147 focusManager.FLAG_BYKEY
150 getFocusType = (event) ->
151 target = event.originalTarget
153 when isTextInputElement(target) or isContentEditable(target)
155 when isActivatable(target)
157 when isAdjustable(target)
166 listen = (element, eventName, listener, useCapture = true) ->
167 element.addEventListener(eventName, listener, useCapture)
169 element.removeEventListener(eventName, listener, useCapture)
172 listenOnce = (element, eventName, listener, useCapture = true) ->
175 element.removeEventListener(eventName, fn, useCapture)
176 listen(element, eventName, fn, useCapture)
178 suppressEvent = (event) ->
179 event.preventDefault()
180 event.stopPropagation()
182 # Simulate mouse click with a full chain of events. ('command' is for XUL
184 eventSequence = ['mouseover', 'mousedown', 'mouseup', 'click', 'command']
185 simulateClick = (element) ->
186 window = element.ownerDocument.defaultView
187 for type in eventSequence
188 mouseEvent = new window.MouseEvent(type, {
189 # Let the event bubble in order to trigger delegated event listeners.
191 # Make the event cancelable so that `<a href="#">` can be used as a
192 # JavaScript-powered button without scrolling to the top of the page.
195 element.dispatchEvent(mouseEvent)
203 return element.clientWidth * element.clientHeight
205 createBox = (document, className, parent = null, text = null) ->
206 box = document.createElement('box')
207 box.className = className
208 box.textContent = text if text?
209 parent.appendChild(box) if parent?
212 insertText = (input, value) ->
213 { selectionStart, selectionEnd } = input
215 input.value[0...selectionStart] + value + input.value[selectionEnd..]
216 input.selectionStart = input.selectionEnd = selectionStart + value.length
218 setAttributes = (element, attributes) ->
219 for attribute, value of attributes
220 element.setAttribute(attribute, value)
228 constructor: ({ start: @value = 0, @step = 1 }) ->
229 tick: -> @value += @step
235 on: (event, listener) ->
236 (@listeners[event] ?= []).push(listener)
238 emit: (event, data) ->
239 for listener in @listeners[event] ? []
243 has = (obj, prop) -> Object::hasOwnProperty.call(obj, prop)
245 nextTick = (window, fn) -> window.setTimeout(fn, 0)
247 regexEscape = (s) -> s.replace(/[|\\{}()[\]^$+*?.]/g, '\\$&')
249 removeDuplicates = (array) ->
250 # coffeelint: disable=no_backticks
251 return `[...new Set(array)]`
252 # coffeelint: enable=no_backticks
254 # Remove duplicate characters from string (case insensitive).
255 removeDuplicateCharacters = (str) ->
256 return removeDuplicates( str.toLowerCase().split('') ).join('')
262 formatError = (error) ->
263 stack = String(error.stack?.formattedStack ? error.stack ? '')
265 .filter((line) -> line.includes('.xpi!'))
266 .map((line) -> ' ' + line.replace(/(?:\/<)*@.+\.xpi!/g, '@'))
268 return "#{ error }\n#{ stack }"
270 getCurrentLocation = ->
271 window = getCurrentWindow()
272 return new window.URL(window.gBrowser.selectedBrowser.currentURI.spec)
274 getCurrentWindow = ->
275 windowMediator = Cc['@mozilla.org/appshell/window-mediator;1']
276 .getService(Components.interfaces.nsIWindowMediator)
277 return windowMediator.getMostRecentWindow('navigator:browser')
280 sss = Cc['@mozilla.org/content/style-sheet-service;1']
281 .getService(Ci.nsIStyleSheetService)
282 uri = Services.io.newURI("chrome://vimfx/skin/#{ name }.css", null, null)
283 method = sss.AUTHOR_SHEET
284 unless sss.sheetRegistered(uri, method)
285 sss.loadAndRegisterSheet(uri, method)
287 sss.unregisterSheet(uri, method)
290 observe = (topic, observer) ->
291 observer = {observe: observer} if typeof observer == 'function'
292 Services.obs.addObserver(observer, topic, false)
294 Services.obs.removeObserver(observer, topic, false)
297 openTab = (window, url, options) ->
298 { gBrowser } = window
299 window.TreeStyleTabService?.readyToOpenChildTab(gBrowser.selectedTab)
300 gBrowser.loadOneTab(url, options)
302 # Executes `fn` and measures how much time it took.
303 timeIt = (fn, name) ->
306 console.timeEnd(name)
309 writeToClipboard = (text) ->
310 clipboardHelper = Cc['@mozilla.org/widget/clipboardhelper;1']
311 .getService(Ci.nsIClipboardHelper)
312 clipboardHelper.copyString(text)
325 blurActiveBrowserElement
346 removeDuplicateCharacters