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#
# A heads-up-display (HUD) for showing Vimium page operations.
# Note: you cannot interact with the HUD until document.body is available.
#
HUD =
tween: null
hudUI: null
_displayElement: null
# This HUD is styled to precisely mimick the chrome HUD on Mac. Use the "has_popup_and_link_hud.html"
# test harness to tweak these styles to match Chrome's. One limitation of our HUD display is that
# it doesn't sit on top of horizontal scrollbars like Chrome's HUD does.
init: ->
@hudUI = new UIComponent "pages/hud.html", "vimiumHUDFrame", ({data}) =>
this[data.name]? data
@tween = new Tween "iframe.vimiumHUDFrame.vimiumUIComponentVisible", @hudUI.shadowDOM
showForDuration: (text, duration) ->
@show(text)
@_showForDurationTimerId = setTimeout((=> @hide()), duration)
show: (text) ->
return unless @enabled()
clearTimeout(@_showForDurationTimerId)
@hudUI.show {name: "show", text}
@tween.fade 1.0, 150
# Hide the HUD.
# If :immediate is falsy, then the HUD is faded out smoothly (otherwise it is hidden immediately).
# If :updateIndicator is truthy, then we also refresh the mode indicator. The only time we don't update the
# mode indicator, is when hide() is called for the mode indicator itself.
hide: (immediate = false, updateIndicator = true) ->
return unless @tween?
clearTimeout(@_showForDurationTimerId)
@tween.stop()
if immediate
unless updateIndicator
@hudUI.hide()
@hudUI.postMessage {name: "hide"}
Mode.setIndicator() if updateIndicator
else
@tween.fade 0, 150, => @hide true, updateIndicator
isReady: do ->
ready = false
DomUtils.documentReady -> ready = true
-> ready and document.body != null
# A preference which can be toggled in the Options page. */
enabled: -> !Settings.get("hideHud")
class Tween
opacity: 0
intervalId: -1
styleElement: null
constructor: (@cssSelector, insertionPoint = document.documentElement) ->
@styleElement = document.createElement "style"
unless @styleElement.style
# We're in an XML document, so we shouldn't inject any elements. See the comment in UIComponent.
Tween::fade = Tween::stop = Tween::updateStyle = ->
return
@styleElement.type = "text/css"
@styleElement.innerHTML = ""
insertionPoint.appendChild @styleElement
fade: (toAlpha, duration, onComplete) ->
clearInterval @intervalId
startTime = (new Date()).getTime()
fromAlpha = @opacity
alphaStep = toAlpha - fromAlpha
performStep = =>
elapsed = (new Date()).getTime() - startTime
if (elapsed >= duration)
clearInterval @intervalId
@updateStyle toAlpha
onComplete?()
else
value = (elapsed / duration) * alphaStep + fromAlpha
@updateStyle value
@updateStyle @opacity
@intervalId = setInterval performStep, 50
stop: -> clearInterval @intervalId
updateStyle: (@opacity) ->
@styleElement.innerHTML = """
#{@cssSelector} {
opacity: #{@opacity};
}
"""
root = exports ? window
root.HUD = HUD
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