extension/packages/events.coffee

   1 utils                           = require 'utils'
   2 keyUtils                        = require 'key-utils'
   3 { getCommand }                  = require 'commands'
   4 { Vim }                         = require 'vim'
   5 { getPref }                     = require 'prefs'
   6 { setWindowBlacklisted } = require 'button'
   7
   8 { interfaces: Ci } = Components
   9
  10 vimBucket = new utils.Bucket utils.getWindowId, (obj) -> new Vim obj
  11
  12 suppressEvent = (event) ->
  13   event.preventDefault()
  14   event.stopPropagation()
  15
  16 # The following listeners are installed on every top level Chrome window
  17 windowsListener =
  18   'keydown': (event) ->
  19
  20     if getPref 'disabled'
  21       return
  22
  23     try
  24       isEditable =  utils.isElementEditable event.originalTarget
  25
  26       { ctrlKey: ctrl, metaKey: meta, altKey: alt, shiftKey: shift } = event
  27
  28       # any keys modified with meta or alt should be ignored
  29       if meta or alt
  30         return
  31
  32       # Extract keyChar from keyCode and apply modifiers
  33       if keyChar = keyUtils.keyCharFromCode(event.keyCode, shift)
  34         keyStr = keyUtils.applyModifiers(keyChar, ctrl, alt, meta)
  35
  36       # We only handle the key if it's recognized by `keyCharFromCode`
  37       # and if there is no focused editable element # or if it's the *Esc* key,
  38       # which will remove the focus from the currently focused element
  39       if keyStr and (not isEditable or keyStr == 'Esc')
  40         if window = utils.getCurrentTabWindow event
  41           if vim = vimBucket.get(window)
  42             # No action if blacklisted
  43             if vim.blacklisted
  44               return
  45
  46             if vim.handleKeyDown(event, keyStr)
  47               if keyStr != 'Esc'
  48                 suppressEvent event
  49     catch err
  50       console.log err, 'keydown'
  51
  52   'keypress': (event) ->
  53     if getPref 'disabled'
  54       return
  55
  56     try
  57       # Try to execute keys that were accumulated so far.
  58       # Suppress event if there is a matching command.
  59       if window = utils.getCurrentTabWindow event
  60         if vim = vimBucket.get(window)
  61           # No action on blacklisted locations
  62           if vim.blacklisted
  63             return
  64
  65           if vim.handleKeyPress event
  66             suppressEvent event
  67     catch err
  68       console.log err, 'keypress'
  69
  70   # When the top level window closes we should release all Vims that were
  71   # associated with tabs in this window
  72   'DOMWindowClose': (event) ->
  73     if gBrowser = event.originalTarget.gBrowser
  74       for tab in gBrowser.tabs
  75         if browser = gBrowser.getBrowserForTab tab
  76           vimBucket.forget browser.contentWindow
  77
  78   'TabClose': (event) ->
  79     if gBrowser = utils.getEventTabBrowser event
  80       if browser = gBrowser.getBrowserForTab event.originalTarget
  81         vimBucket.forget browser.contentWindow
  82
  83   # Update the toolbar button icon to reflect the blacklisted state
  84   'TabSelect': (event) ->
  85     if vim = vimBucket.get event.originalTarget?.linkedBrowser?.contentDocument?.defaultView
  86       if rootWindow = utils.getRootWindow vim.window
  87         setWindowBlacklisted rootWindow, vim.blacklisted
  88
  89 # This listener works on individual tabs within Chrome Window
  90 # User for: listening for location changes and disabling the extension
  91 # on black listed urls
  92 tabsListener =
  93   onLocationChange: (browser, webProgress, request, location) ->
  94     blacklisted = utils.isBlacklisted location.spec, getPref 'black_list'
  95     if vim = vimBucket.get(browser.contentWindow)
  96       vim.blacklisted = blacklisted
  97       if rootWindow = utils.getRootWindow vim.window
  98         setWindowBlacklisted rootWindow, vim.blacklisted
  99
 100 addEventListeners = (window) ->
 101   for name, listener of windowsListener
 102     window.addEventListener name, listener, true
 103
 104   # Install onLocationChange listener
 105   window.gBrowser.addTabsProgressListener tabsListener
 106
 107   removeEventListeners = ->
 108     for name, listener of windowsListener
 109       window.removeEventListener name, listener, true
 110
 111   unload ->
 112     removeEventListeners window
 113     window.gBrowser.removeTabsProgressListener tabsListener
 114
 115 exports.addEventListeners = addEventListeners