extension/packages/utils.coffee

   1 { interfaces: Ci, classes: Cc, utils: Cu } = Components
   2
   3 HTMLInputElement    = Ci.nsIDOMHTMLInputElement
   4 HTMLTextAreaElement = Ci.nsIDOMHTMLTextAreaElement
   5 HTMLSelectElement   = Ci.nsIDOMHTMLSelectElement
   6 XULDocument         = Ci.nsIDOMXULDocument
   7 XULElement          = Ci.nsIDOMXULElement
   8 HTMLDocument        = Ci.nsIDOMHTMLDocument
   9 HTMLElement         = Ci.nsIDOMHTMLElement
  10 Window              = Ci.nsIDOMWindow
  11 ChromeWindow        = Ci.nsIDOMChromeWindow
  12
  13 _sss  = Cc["@mozilla.org/content/style-sheet-service;1"].getService(Ci.nsIStyleSheetService)
  14 _clip = Cc["@mozilla.org/widget/clipboard;1"].getService(Ci.nsIClipboard)
  15
  16 { getPref } = require 'prefs'
  17
  18 class Bucket
  19   constructor: (@idFunc, @newFunc) ->
  20     @bucket = {}
  21
  22   get: (obj) ->
  23     id = @idFunc obj
  24     if container = @bucket[id]
  25       return container
  26     else
  27       return @bucket[id] = @newFunc obj
  28
  29   forget: (obj) ->
  30     delete @bucket[id] if id = @idFunc obj
  31
  32 # Returns the `window` from the currently active tab.
  33 getCurrentTabWindow = (event) ->
  34   if window = getEventWindow event
  35     if rootWindow = getRootWindow window
  36       return rootWindow.gBrowser.selectedTab.linkedBrowser.contentWindow
  37
  38 # Returns the window associated with the event
  39 getEventWindow = (event) ->
  40   if event.originalTarget instanceof Window
  41     return event.originalTarget
  42   else
  43     doc = event.originalTarget.ownerDocument or event.originalTarget
  44     if doc instanceof HTMLDocument or doc instanceof XULDocument
  45       return doc.defaultView
  46
  47 getEventRootWindow = (event) ->
  48   if window = getEventWindow event
  49     return getRootWindow window
  50
  51 getEventTabBrowser = (event) ->
  52   cw.gBrowser if cw = getEventRootWindow event
  53
  54 getRootWindow = (window) ->
  55   return window.QueryInterface(Ci.nsIInterfaceRequestor)
  56                .getInterface(Ci.nsIWebNavigation)
  57                .QueryInterface(Ci.nsIDocShellTreeItem)
  58                .rootTreeItem
  59                .QueryInterface(Ci.nsIInterfaceRequestor)
  60                .getInterface(Window);
  61
  62 isElementEditable = (element) ->
  63   return element.isContentEditable or \
  64          element instanceof HTMLInputElement or \
  65          element instanceof HTMLTextAreaElement or \
  66          element instanceof HTMLSelectElement or \
  67          element.getAttribute('g_editable') == 'true' or \
  68          element.getAttribute('contenteditable')?.toLowerCase() == 'true' or \
  69          element.ownerDocument?.designMode?.toLowerCase() == 'on'
  70
  71 getWindowId = (window) ->
  72   return window.QueryInterface(Components.interfaces.nsIInterfaceRequestor)
  73                .getInterface(Components.interfaces.nsIDOMWindowUtils)
  74                .outerWindowID
  75
  76 getSessionStore = ->
  77   Cc["@mozilla.org/browser/sessionstore;1"].getService(Ci.nsISessionStore);
  78
  79 # Function that returns a URI to the css file that's part of the extension
  80 cssUri = do () ->
  81   (name) ->
  82     baseURI = Services.io.newURI __SCRIPT_URI_SPEC__, null, null
  83     uri = Services.io.newURI "resources/#{ name }.css", null, baseURI
  84     return uri
  85
  86 # Loads the css identified by the name in the StyleSheetService as User Stylesheet
  87 # The stylesheet is then appended to every document, but it can be overwritten by
  88 # any user css
  89 loadCss = (name) ->
  90   uri = cssUri(name)
  91   if !_sss.sheetRegistered(uri, _sss.AGENT_SHEET)
  92     _sss.loadAndRegisterSheet(uri, _sss.AGENT_SHEET)
  93
  94   unload ->
  95     _sss.unregisterSheet(uri, _sss.AGENT_SHEET)
  96
  97 # Simulate mouse click with full chain of event
  98 # Copied from Vimium codebase
  99 simulateClick = (element, modifiers) ->
 100   document = element.ownerDocument
 101   window = document.defaultView
 102   modifiers ||= {}
 103
 104   eventSequence = ["mouseover", "mousedown", "mouseup", "click"]
 105   for event in eventSequence
 106     mouseEvent = document.createEvent("MouseEvents")
 107     mouseEvent.initMouseEvent(event, true, true, window, 1, 0, 0, 0, 0, modifiers.ctrlKey, false, false,
 108         modifiers.metaKey, 0, null)
 109     # Debugging note: Firefox will not execute the element's default action if we dispatch this click event,
 110     # but Webkit will. Dispatching a click on an input box does not seem to focus it; we do that separately
 111     element.dispatchEvent(mouseEvent)
 112
 113 focusSelection = (document) ->
 114   selection = document.getSelection()
 115   console.expand selection
 116   for i in [0...selection.rangeCount]
 117     console.log "range count", selection.rangeCount, i, selection.getRangeAt(i).startContainer
 118     if element = selection.getRangeAt(i).startContainer?.parentElement
 119       if isElementEditable element
 120         range.startContainer.focus()
 121         return true
 122
 123   return false
 124
 125 # Write a string into system clipboard
 126 writeToClipboard = (window, text) ->
 127   str = Cc["@mozilla.org/supports-string;1"].createInstance(Ci.nsISupportsString);
 128   str.data = text
 129
 130   trans = Cc["@mozilla.org/widget/transferable;1"].createInstance(Ci.nsITransferable);
 131
 132   if trans.init
 133     privacyContext = window.QueryInterface(Ci.nsIInterfaceRequestor)
 134       .getInterface(Ci.nsIWebNavigation)
 135       .QueryInterface(Ci.nsILoadContext);
 136     trans.init(privacyContext);
 137
 138   trans.addDataFlavor("text/unicode");
 139   trans.setTransferData("text/unicode", str, text.length * 2);
 140
 141   _clip.setData trans, null, Ci.nsIClipboard.kGlobalClipboard
 142   #
 143 # Write a string into system clipboard
 144 readFromClipboard = (window) ->
 145   trans = Cc["@mozilla.org/widget/transferable;1"].createInstance(Ci.nsITransferable);
 146
 147   if trans.init
 148     privacyContext = window.QueryInterface(Ci.nsIInterfaceRequestor)
 149       .getInterface(Ci.nsIWebNavigation)
 150       .QueryInterface(Ci.nsILoadContext);
 151     trans.init(privacyContext);
 152
 153   trans.addDataFlavor("text/unicode");
 154
 155   _clip.getData trans, Ci.nsIClipboard.kGlobalClipboard
 156
 157   str = {}
 158   strLength = {}
 159
 160   trans.getTransferData("text/unicode", str, strLength)
 161
 162   if str
 163     str = str.value.QueryInterface(Ci.nsISupportsString);
 164     return str.data.substring 0, strLength.value / 2
 165
 166   return undefined
 167
 168 # Executes function `func` and mearues how much time it took
 169 timeIt = (func, msg) ->
 170   start = new Date().getTime()
 171   result = func()
 172   end = new Date().getTime()
 173
 174   console.log msg, end - start
 175   return result
 176
 177 # Checks if the string provided matches one of the black list entries
 178 # `blackList`: comma/space separated list of URLs with wildcards (* and !)
 179 isBlacklisted = (str, blackList) ->
 180   for rule in blackList.split(/[\s,]+/)
 181     rule = rule.replace(/\*/g, '.*').replace(/\!/g, '.')
 182     if str.match new RegExp("^#{ rule }$")
 183       return true
 184
 185   return false
 186
 187 # Gets VimFx verions. AddonManager only provides async API to access addon data, so it's a bit tricky...
 188 getVersion = do ->
 189   version = null
 190
 191   if version == null
 192     scope = {}
 193     addonId = getPref 'addon_id'
 194     Cu.import("resource://gre/modules/AddonManager.jsm", scope);
 195     scope.AddonManager.getAddonByID addonId, ((addon) -> version = addon.version)
 196
 197   -> version
 198
 199 # Simulate smooth scrolling
 200 smoothScroll = (window, dx, dy, msecs) ->
 201   if msecs <= 0 || !Services.prefs.getBoolPref 'general.smoothScroll'
 202     window.scrollBy dx, dy
 203   else
 204     # Callback
 205     fn = (_x, _y) ->
 206       window.scrollBy(_x, _y)
 207     # Number of steps
 208     delta = 10
 209     l = Math.round(msecs / delta)
 210     while l > 0
 211       x = Math.round(dx / l)
 212       y = Math.round(dy / l)
 213       dx -= x
 214       dy -= y
 215
 216       l -= 1
 217       window.setTimeout fn, l * delta, x, y
 218
 219 parseHTML = (document, html) ->
 220   parser = Cc["@mozilla.org/parserutils;1"].getService(Ci.nsIParserUtils)
 221   flags = parser.SanitizerAllowStyle
 222   return parser.parseFragment(html, flags, false, null, document.documentElement)
 223
 224 regexpEscape = (s) -> return s.replace(/[-\/\\^$*+?.()|[\]{}]/g, '\\$&')
 225
 226 exports.Bucket                  = Bucket
 227 exports.getCurrentTabWindow     = getCurrentTabWindow
 228 exports.getEventWindow          = getEventWindow
 229 exports.getEventRootWindow      = getEventRootWindow
 230 exports.getEventTabBrowser      = getEventTabBrowser
 231
 232 exports.getWindowId             = getWindowId
 233 exports.getRootWindow           = getRootWindow
 234 exports.isElementEditable       = isElementEditable
 235 exports.focusSelection          = focusSelection
 236 exports.getSessionStore         = getSessionStore
 237
 238 exports.loadCss                 = loadCss
 239
 240 exports.simulateClick           = simulateClick
 241 exports.smoothScroll            = smoothScroll
 242 exports.readFromClipboard       = readFromClipboard
 243 exports.writeToClipboard        = writeToClipboard
 244 exports.timeIt                  = timeIt
 245 exports.isBlacklisted           = isBlacklisted
 246 exports.getVersion              = getVersion
 247 exports.parseHTML               = parseHTML
 248 exports.regexpEscape            = regexpEscape