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view.coffee
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view.coffee
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# Rivets.View
# -----------
# A collection of bindings built from a set of parent nodes.
class Rivets.View
# The DOM elements and the model objects for binding are passed into the
# constructor along with any local options that should be used throughout the
# context of the view and it's bindings.
constructor: (@els, @models, options = {}) ->
@els = [@els] unless (@els.jquery or @els instanceof Array)
for option in Rivets.extensions
@[option] = {}
@[option][k] = v for k, v of options[option] if options[option]
@[option][k] ?= v for k, v of Rivets.public[option]
for option in Rivets.options
@[option] = options[option] ? Rivets.public[option]
@build()
options: =>
options = {}
for option in Rivets.extensions.concat Rivets.options
options[option] = @[option]
options
# Regular expression used to match binding attributes.
bindingRegExp: =>
new RegExp "^#{@prefix}-"
buildBinding: (binding, node, type, declaration) =>
options = {}
pipes = (pipe.trim() for pipe in declaration.match /((?:'[^']*')*(?:(?:[^\|']*(?:'[^']*')+[^\|']*)+|[^\|]+))|^$/g)
context = (ctx.trim() for ctx in pipes.shift().split '<')
keypath = context.shift()
options.formatters = pipes
if dependencies = context.shift()
options.dependencies = dependencies.split /\s+/
@bindings.push new Rivets[binding] @, node, type, keypath, options
# Parses the DOM tree and builds `Rivets.Binding` instances for every matched
# binding declaration.
build: =>
@bindings = []
parse = (node) =>
if node.nodeType is 3
parser = Rivets.TextTemplateParser
if delimiters = @templateDelimiters
if (tokens = parser.parse(node.data, delimiters)).length
unless tokens.length is 1 and tokens[0].type is parser.types.text
for token in tokens
text = document.createTextNode token.value
node.parentNode.insertBefore text, node
if token.type is 1
@buildBinding 'TextBinding', text, null, token.value
node.parentNode.removeChild node
else if node.nodeType is 1
block = @traverse node
unless block
parse childNode for childNode in (n for n in node.childNodes)
return
parse el for el in @els
@bindings.sort (a, b) ->
(b.binder?.priority or 0) - (a.binder?.priority or 0)
return
traverse: (node) =>
bindingRegExp = @bindingRegExp()
block = node.nodeName is 'SCRIPT' or node.nodeName is 'STYLE'
for attribute in node.attributes
if bindingRegExp.test attribute.name
type = attribute.name.replace bindingRegExp, ''
unless binder = @binders[type]
for identifier, value of @binders
if identifier isnt '*' and identifier.indexOf('*') isnt -1
regexp = new RegExp "^#{identifier.replace(/\*/g, '.+')}$"
if regexp.test type
binder = value
binder or= @binders['*']
if binder.block
block = true
attributes = [attribute]
for attribute in attributes or node.attributes
if bindingRegExp.test attribute.name
type = attribute.name.replace bindingRegExp, ''
@buildBinding 'Binding', node, type, attribute.value
unless block
type = node.nodeName.toLowerCase()
if @components[type] and not node._bound
@bindings.push new Rivets.ComponentBinding @, node, type
block = true
block
# Returns an array of bindings where the supplied function evaluates to true.
select: (fn) =>
binding for binding in @bindings when fn binding
# Binds all of the current bindings for this view.
bind: =>
binding.bind() for binding in @bindings
return
# Unbinds all of the current bindings for this view.
unbind: =>
binding.unbind() for binding in @bindings
return
# Syncs up the view with the model by running the routines on all bindings.
sync: =>
binding.sync?() for binding in @bindings
return
# Publishes the input values from the view back to the model (reverse sync).
publish: =>
binding.publish() for binding in @select (b) -> b.binder?.publishes
return
# Updates the view's models along with any affected bindings.
update: (models = {}) =>
@models[key] = model for key, model of models
binding.update? models for binding in @bindings
return