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$ = (id) -> document.getElementById id
bgSettings = chrome.extension.getBackgroundPage().Settings
#
# Class hierarchy for various types of option.
class Option
# Base class for all option classes.
# Abstract. Option does not define @populateElement or @readValueFromElement.
# Static. Array of all options.
@all = []
constructor: (field,enableSaveButton) ->
@field = field
@element = $(@field)
@element.addEventListener "change", enableSaveButton
@fetch()
Option.all.push @
# Fetch a setting from localStorage, remember the @previous value and populate the DOM element.
# Return the fetched value.
fetch: ->
@populateElement @previous = bgSettings.get @field
@previous
# Write this option's new value back to localStorage, if necessary.
save: ->
value = @readValueFromElement()
if not @areEqual value, @previous
bgSettings.set @field, @previous = value
bgSettings.performPostUpdateHook @field, value
# Compare values; this is overridden by sub-classes.
areEqual: (a,b) -> a == b
restoreToDefault: ->
bgSettings.clear @field
@fetch()
# Static method.
@saveOptions: ->
Option.all.map (option) -> option.save()
$("saveOptions").disabled = true
# Used by text options. <ctrl-Enter> saves all options.
activateCtrlEnterListener: (element) ->
element.addEventListener "keyup", (event) ->
if event.ctrlKey and event.keyCode == 13
element.blur()
Option.saveOptions()
# Abstract method; only implemented in sub-classes.
# Populate the option's DOM element (@element) with the setting's current value.
# populateElement: (value) -> DO_SOMETHING
# Abstract method; only implemented in sub-classes.
# Extract the setting's new value from the option's DOM element (@element).
# readValueFromElement: -> RETURN_SOMETHING
class NumberOption extends Option
populateElement: (value) -> @element.value = value
readValueFromElement: -> parseFloat @element.value
class TextOption extends Option
constructor: (field,enableSaveButton) ->
super(field,enableSaveButton)
@element.addEventListener "input", enableSaveButton
@activateCtrlEnterListener @element
populateElement: (value) -> @element.value = value
readValueFromElement: -> @element.value.trim()
class NonEmptyTextOption extends Option
constructor: (field,enableSaveButton) ->
super(field,enableSaveButton)
@element.addEventListener "input", enableSaveButton
@activateCtrlEnterListener @element
populateElement: (value) -> @element.value = value
# If the new value is not empty, then return it. Otherwise, restore the default value.
readValueFromElement: -> if value = @element.value.trim() then value else @restoreToDefault()
class CheckBoxOption extends Option
populateElement: (value) -> @element.checked = value
readValueFromElement: -> @element.checked
class ExclusionRulesOption extends Option
constructor: (args...) ->
super(args...)
$("exclusionAddButton").addEventListener "click", (event) =>
@appendRule { pattern: "", passKeys: "" }
@maintainExclusionMargin()
# Focus the pattern element in the new rule.
@element.children[@element.children.length-1].children[0].children[0].focus()
# Scroll the new rule into view.
exclusionScrollBox = $("exclusionScrollBox")
exclusionScrollBox.scrollTop = exclusionScrollBox.scrollHeight
populateElement: (rules) ->
while @element.firstChild
@element.removeChild @element.firstChild
for rule in rules
@appendRule rule
@maintainExclusionMargin()
# Append a row for a new rule.
appendRule: (rule) ->
content = document.querySelector('#exclusionRuleTemplate').content
row = document.importNode content, true
for field in ["pattern", "passKeys"]
element = row.querySelector ".#{field}"
element.value = rule[field]
@activateCtrlEnterListener element
for event in [ "input", "change" ]
element.addEventListener event, enableSaveButton
remove = row.querySelector ".exclusionRemoveButton"
remove.addEventListener "click", (event) =>
row = event.target.parentNode.parentNode
row.parentNode.removeChild row
enableSaveButton()
@maintainExclusionMargin()
@element.appendChild row
readValueFromElement: ->
rules =
for element in @element.children
pattern = element.children[0].firstChild.value.trim()
passKeys = element.children[1].firstChild.value.trim()
{ pattern: pattern, passKeys: passKeys }
rules.filter (rule) -> rule.pattern
areEqual: (a,b) ->
# Flatten each list of rules to a newline-separated string representation, and then use string equality.
# This is correct because patterns and passKeys cannot themselves contain newlines.
flatten = (rule) -> if rule and rule.pattern then rule.pattern + "\n" + rule.passKeys else ""
a.map(flatten).join("\n") == b.map(flatten).join("\n")
# Hack. There has to be a better way than...
# The y-axis scrollbar for "exclusionRules" is only displayed if it is needed. When visible, it appears on
# top of the enclosed content (partially obscuring it). Here, we adjust the margin of the "Remove" button to
# compensate.
maintainExclusionMargin: ->
scrollBox = $("exclusionScrollBox")
margin = if scrollBox.clientHeight < scrollBox.scrollHeight then "16px" else "0px"
for element in scrollBox.getElementsByClassName "exclusionRemoveButton"
element.style["margin-right"] = margin
#
# Operations for page elements.
enableSaveButton = ->
$("saveOptions").removeAttribute "disabled"
# Display either "linkHintNumbers" or "linkHintCharacters", depending upon "filterLinkHints".
maintainLinkHintsView = ->
hide = (el) -> el.parentNode.parentNode.style.display = "none"
show = (el) -> el.parentNode.parentNode.style.display = "table-row"
if $("filterLinkHints").checked
hide $("linkHintCharacters")
show $("linkHintNumbers")
else
show $("linkHintCharacters")
hide $("linkHintNumbers")
toggleAdvancedOptions =
do (advancedMode=false) ->
(event) ->
if advancedMode
$("advancedOptions").style.display = "none"
$("advancedOptionsLink").innerHTML = "Show advanced options…"
else
$("advancedOptions").style.display = "table-row-group"
$("advancedOptionsLink").innerHTML = "Hide advanced options"
advancedMode = !advancedMode
event.preventDefault()
activateHelpDialog = ->
showHelpDialog chrome.extension.getBackgroundPage().helpDialogHtml(true, true, "Command Listing"), frameId
#
# Initialization.
document.addEventListener "DOMContentLoaded", ->
# Populate options. The constructor adds each new object to "Option.all".
new type(name,enableSaveButton) for name, type of {
exclusionRules: ExclusionRulesOption
filterLinkHints: CheckBoxOption
hideHud: CheckBoxOption
keyMappings: TextOption
linkHintCharacters: NonEmptyTextOption
linkHintNumbers: NonEmptyTextOption
newTabUrl: NonEmptyTextOption
nextPatterns: NonEmptyTextOption
previousPatterns: NonEmptyTextOption
regexFindMode: CheckBoxOption
scrollStepSize: NumberOption
searchEngines: TextOption
searchUrl: NonEmptyTextOption
userDefinedLinkHintCss: TextOption
}
$("saveOptions").addEventListener "click", Option.saveOptions
$("advancedOptionsLink").addEventListener "click", toggleAdvancedOptions
$("showCommands").addEventListener "click", activateHelpDialog
$("filterLinkHints").addEventListener "click", maintainLinkHintsView
for element in document.getElementsByClassName "nonEmptyTextOption"
element.className = element.className + " example info"
element.innerHTML = "Leave empty to reset this option."
maintainLinkHintsView()
window.onbeforeunload = -> "You have unsaved changes to options." unless $("saveOptions").disabled
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