1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
|
class UIComponent
iframeElement: null
iframePort: null
showing: null
options: null
constructor: (iframeUrl, className, @handleMessage) ->
@iframeElement = document.createElement "iframe"
@iframeElement.className = className
@iframeElement.seamless = "seamless"
@iframeElement.src = chrome.runtime.getURL iframeUrl
@iframeElement.addEventListener "load", => @openPort()
document.documentElement.appendChild @iframeElement
@showing = true # The iframe is visible now.
# Hide the iframe, but don't interfere with the focus.
@hide false
# If any other frame in the current tab receives the focus, then we hide the UI component.
# NOTE(smblott) This is correct for the vomnibar, but might be incorrect (and need to be revisited) for
# other UI components.
chrome.runtime.onMessage.addListener (request) =>
@postMessage "hide" if @showing and request.name == "frameFocused" and request.focusFrameId != frameId
false # Free up the sendResponse handler.
# Open a port and pass it to the iframe via window.postMessage.
openPort: ->
messageChannel = new MessageChannel()
@iframePort = messageChannel.port1
@iframePort.onmessage = (event) => @handleMessage event
# Get vimiumSecret so the iframe can determine that our message isn't the page impersonating us.
chrome.storage.local.get "vimiumSecret", ({vimiumSecret: secret}) =>
@iframeElement.contentWindow.postMessage secret, chrome.runtime.getURL(""), [messageChannel.port2]
postMessage: (message) ->
@iframePort.postMessage message
activate: (@options) ->
@postMessage @options if @options?
@show() unless @showing
@iframeElement.focus()
show: (message) ->
@postMessage message if message?
@iframeElement.classList.remove "vimiumUIComponentHidden"
@iframeElement.classList.add "vimiumUIComponentShowing"
# The window may not have the focus. We focus it now, to prevent the "focus" listener below from firing
# immediately.
window.focus()
window.addEventListener "focus", @onFocus = (event) =>
if event.target == window
window.removeEventListener "focus", @onFocus
@onFocus = null
@postMessage "hide"
@showing = true
hide: (focusWindow = true)->
@refocusSourceFrame @options?.sourceFrameId if focusWindow
window.removeEventListener "focus", @onFocus if @onFocus
@onFocus = null
@iframeElement.classList.remove "vimiumUIComponentShowing"
@iframeElement.classList.add "vimiumUIComponentHidden"
@options = null
@showing = false
# Refocus the frame from which the UI component was opened. This may be different from the current frame.
# After hiding the UI component, Chrome refocuses the containing frame. To avoid a race condition, we need
# to wait until that frame first receives the focus, before then focusing the frame which should now have
# the focus.
refocusSourceFrame: (sourceFrameId) ->
if @showing and sourceFrameId? and sourceFrameId != frameId
refocusSourceFrame = ->
chrome.runtime.sendMessage
handler: "sendMessageToFrames"
message:
name: "focusFrame"
frameId: sourceFrameId
highlight: false
highlightOnlyIfNotTop: true
if windowIsFocused()
# We already have the focus.
refocusSourceFrame()
else
# We don't yet have the focus (but we'll be getting it soon).
window.addEventListener "focus", handler = (event) ->
if event.target == window
window.removeEventListener "focus", handler
refocusSourceFrame()
root = exports ? window
root.UIComponent = UIComponent
|
