Module: Ruby2JS::Filter::AngularRB

Includes:
SEXP
Defined in:
lib/ruby2js/filter/angularrb.rb

Constant Summary collapse

Angular = 
s(:const, nil, :Angular)
EXPRESSION =

input:

filter :name do |input|
  ...
end

output:

AppName.filter :name do
  return lambda {|input| return ... }
end

[ :and, :array, :attr, :const, :cvar, :defined?, :dstr,
:dsym, :false, :float, :gvar, :hash, :int, :ivar, :lvar, :nil, :not,
:or, :regexp, :self, :send, :str, :sym, :true, :undefined?, :xstr ]
NG_METHOD_MAP = 
{
  :apply! => [:$rootScope, :$apply],
  :apply => [:$scope, :$apply],
  :broadcast! => [:$rootScope, :$broadcast],
  :broadcast => [:$scope, :$broadcast],
  :digest! => [:$rootScope, :$digest],
  :digest => [:$scope, :$digest],
  :emit => [:$scope, :$emit],
  :evalAsync! => [:$rootScope, :$evalAsync],
  :evalAsync => [:$scope, :$evalAsync],
  :eval! => [:$rootScope, :$eval],
  :eval => [:$scope, :$eval],
  :filter => [nil, :$filter],
  :parent => [:$scope, :$parent],
}
BUILTINS = 
[ :Array, :Boolean, :Date, :Error, :Function, :Infinity, :JSON,
:Math, :NaN, :Number, :Object, :RegExp, :String ]

Class Method Summary collapse

Instance Method Summary collapse

Methods included from SEXP

#s

Class Method Details

.hash(pairs) ⇒ Object

convert simple assignments, simple method calls, and simple method definitions into a hash when possible; return false otherwise



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# File 'lib/ruby2js/filter/angularrb.rb', line 17

def self.hash(pairs)
  if pairs.length == 1 and pairs.first.type == :begin
    pairs = pairs.first.children
  end

  s(:hash, *pairs.map {|pair| 
    if pair.type == :send and pair.children[0] == nil
      s(:pair, s(:sym, pair.children[1]), pair.children[2])
    elsif pair.type == :lvasgn
      s(:pair, s(:sym, pair.children[0]), pair.children[1])
    elsif pair.type == :def
      s(:pair, s(:sym, pair.children[0]), s(:block, s(:send, nil, :proc),
        *pair.children[1..-1]))
    else
      return false
    end
  })
end

.s(type, *args) ⇒ Object 



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# File 'lib/ruby2js/filter/angularrb.rb', line 9

def self.s(type, *args)
  Parser::AST::Node.new type, args
end

Instance Method Details

#extract_uses(block) ⇒ Object 



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# File 'lib/ruby2js/filter/angularrb.rb', line 578

def extract_uses(block)
  # find the block
  while block.length == 1 and block.first and block.first.type == :begin
    block.push *block.shift.children
  end

  # find use class method calls
  uses = block.find_all do |node|
    node and node.type == :send and node.children[0..1] == [nil, :use]
  end

  # convert use calls into dependencies
  depends = []
  uses.each do |use|
    use.children[2..-1].each do |node|
      depends << node if [:str, :sym].include? node.type
    end
    block.delete use
  end

  depends
end

#initialize(*args) ⇒ Object 



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# File 'lib/ruby2js/filter/angularrb.rb', line 36

def initialize(*args)
  @ngApp = nil
  @ngContext = nil
  @ngAppUses = []
  @ngClassUses = []
  @ngClassOmit = []
  super
end

#ng_config(node) ⇒ Object

input:

config :service do
  name = value
end

output:

AppName.config("service") do |service|
  service.name = value
end



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# File 'lib/ruby2js/filter/angularrb.rb', line 209

def ng_config(node)
  call = node.children.first
  services = call.children[2..-1].map {|sym| sym.children[0]}
  list = node.children[2..-1]

  if services.length == 1
    hash = AngularRB.hash(node.children[2..-1])
    if hash
      service = call.children[2].children[0]
      list = hash.children.map do |pair|
        s(:send, s(:gvar, service), "#{pair.children[0].children[0]}=",
          pair.children[1])
      end
    end
  end

  s(:send, @ngApp, :config, 
    s(:array, *services.map {|sym| s(:str, sym.to_s)}, 
      s(:block, s(:send, nil, :proc), 
        s(:args, *services.map {|sym| s(:arg, sym)}), s(:begin, *list))))
end

#ng_controller(node, scope) ⇒ Object

input:

controller :name do
  ...
end

output:

AppName.controller("name") do |uses|
  ...
end



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# File 'lib/ruby2js/filter/angularrb.rb', line 240

def ng_controller(node, scope)
  ngContext, @ngContext = @ngContext, scope
  @ngClassUses, @ngClassOmit = [], []
  target = node.children.first
  target = target.updated(nil, [@ngApp, *target.children[1..-1]])

  block = process_all(node.children[2..-1])

  # convert use calls into args
  @ngClassUses -= @ngClassOmit
  args = node.children[1].children
  args += @ngClassUses.map {|sym| s(:arg, sym)} + extract_uses(block)
  args = args.map {|node| node.children.first.to_sym}.uniq.
    map {|sym| s(:arg, sym)}

  node.updated :block, [target, s(:args, *args), s(:begin, *block)]
ensure
  @ngClassUses, @ngClassOmit = [], []
  @ngContext = ngContext
end

#ng_factory(node) ⇒ Object

input:

factory :name do |uses|
  ...
end

output:

AppName.factory :name, [uses, lambda {|uses| ...}]



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# File 'lib/ruby2js/filter/angularrb.rb', line 307

def ng_factory(node)
  ngContext, @ngContext = @ngContext, :factory
  call = node.children.first
  call = call.updated(nil, [@ngApp, *call.children[1..-1]])

  # insert return
  block = process_all(node.children[2..-1])
  tail = [block.pop || s(:nil)]
  while tail.length == 1 and tail.first.type == :begin
    tail = tail.first.children.dup
  end
  tail.push s(:return, tail.pop) unless tail.last.type == :return
  block.push (tail.length == 1 ? tail.first : s(:begin, *tail))

  # extract dependencies
  @ngClassUses.delete call.children[2].children[0]
  args = process_all(node.children[1].children)
  args += @ngClassUses.map {|sym| s(:arg, sym)} + extract_uses(block)
  args = args.map {|node| node.children.first.to_sym}.uniq.
    map {|sym| s(:arg, sym)}

  # construct a function
  function = s(:block, s(:send, nil, :lambda), s(:args, *args), *block)
  array = args.map {|arg| s(:str, arg.children.first.to_s)}

  s(:send, *call.children, s(:array, *array, function))
ensure
  @ngClassUses, @ngClassOmit = [], []
  @ngContext = ngContext
end

#ng_filter(node) ⇒ Object 



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# File 'lib/ruby2js/filter/angularrb.rb', line 274

def ng_filter(node)
  ngContext, @ngContext = @ngContext, :filter
  @ngClassUses, @ngClassOmit = [], []
  call = node.children.first

  # insert return
  args = process_all(node.children[1].children)
  block = process_all(node.children[2..-1])
  uses = (@ngClassUses - @ngClassOmit).uniq.map {|sym| s(:arg, sym)}
  tail = [block.pop || s(:nil)]
  while tail.length == 1 and tail.first.type == :begin
    tail = tail.first.children.dup
  end
  tail.push s(:return, tail.pop) if EXPRESSION.include? tail.last.type
  block.push (tail.length == 1 ? tail.first : s(:begin, *tail))

  # construct a function returning a function
  inner = s(:block, s(:send, nil, :lambda), s(:args, *args), *block)
  outer = s(:send, @ngApp, :filter, *call.children[2..-1])

  node.updated nil, [outer, s(:args, *uses), s(:return, inner)]
ensure
  @ngClassUses, @ngClassOmit = [], []
  @ngContext = ngContext
end

#ng_observe(node) ⇒ Object

input:

observe attr.name do |value|
  ...
end

output:

attr.$observe('name') do |value|
  ...
end



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# File 'lib/ruby2js/filter/angularrb.rb', line 409

def ng_observe(node)
  if @ngContext == :controller and @ngScope
    call = node.children[0]
    expression = call.children[2]
    call = s(:send, expression.children[0], :$observe, 
      s(:sym, expression.children[1]))
    process node.updated nil, [call, *node.children[1..-1]]
  else
    node.updated nil, process_all(node.children) 
  end
end

#ng_watch(node, method) ⇒ Object

input:

watch 'expression' do |oldvalue, newvalue|
  ...
end

output:

$scope.$watch 'expression' do |oldvalue, newvalue|
  ...
end

also handles ‘on’



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# File 'lib/ruby2js/filter/angularrb.rb', line 381

def ng_watch(node, method)
  call = node.children.first
  if @ngContext == :controller and call.children.first == nil
    target = s(:gvar, :$scope)
    expression = call.children[2]
    if not [:str, :dstr, :sym, :dsym].include? expression.type
      expression = s(:block, s(:send, nil, :proc), s(:args), 
        s(:return, expression))
    end
  else
    target = nil
    method = call.children[1]
    expression = call.children[2]
  end
  call = s(:send, process(target), method, process(expression), 
    *process_all(call.children[3..-1]))
  node.updated nil, [call, *process_all(node.children[1..-1])]
end

#on_block(node) ⇒ Object

input:

filter :name { ... }
controller :name { ... }
factory :name { ... }
directive :name { ... }



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# File 'lib/ruby2js/filter/angularrb.rb', line 153

def on_block(node)
  ngApp = @ngApp
  call = node.children.first
  target = call.children.first
  if target and target.type == :const and target.children.first == Angular
    @ngApp = s(:send, s(:lvar, :angular), :module, s(:str,
      target.children.last.to_s))
  else
    return super if target
    return super unless @ngApp
  end

  begin
    case call.children[1]
    when :controller
      ng_controller(node, :controller)
    when :factory
      ng_factory(node)
    when :filter
      ng_filter(node)
    when :config
      ng_config(node)
    when :directive
      hash = AngularRB.hash(node.children[2..-1])
      if hash
        node = node.updated nil, [*node.children[0..1], s(:return, hash)]
      end
      ng_controller(node, :directive)
    when :watch
      ng_watch(node, :$watch)
    when :on
      ng_watch(node, :$on)
    when :observe
      ng_observe(node)
    when :timeout, :interval
      method = (call.children[1] == :timeout ? :$timeout : :$interval)
      process s(:gvar, method) # for dependency injection purposes
      process s(:send, nil, method, s(:block, s(:send, nil, :proc), 
        *node.children[1..-1]), *call.children[2..-1])
    else
      super
    end
  ensure
    @ngApp = ngApp
  end
end

#on_casgn(node) ⇒ Object

input:

Constant = ...

output:

AppName.factory :name, [uses, lambda {|uses| ...}]



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# File 'lib/ruby2js/filter/angularrb.rb', line 343

def on_casgn(node)
  return super if node.children[0]
  @ngClassOmit << node.children[1]
  return super unless @ngApp and @ngChildren.include? node
  ng_factory s(:block, s(:send, nil, :factory, s(:sym, node.children[1])),
    s(:args), process(node.children[2]))
end

#on_class(node) ⇒ Object

input:

class name {...}

output:

app.factory(uses) do
  ...
end



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# File 'lib/ruby2js/filter/angularrb.rb', line 116

def on_class(node)
  ngContext, @ngContext = @ngContext, :class
  return super unless @ngApp and @ngChildren.include? node

  name = node.children.first
  if name.children.first == nil
    @ngClassUses, @ngClassOmit = [], []
    @ngClassUses << node.children[1].children[1] if node.children[1]

    block = [node.children.last]
    uses = extract_uses(block)
    node = s(:class, name, node.children[1], 
      s(:begin, *process_all(block)))

    @ngClassUses -= @ngClassOmit + [name.children.last]
    args = @ngClassUses.map {|sym| s(:arg, sym)} + uses
    args = args.map {|node| node.children.first.to_sym}.uniq.
      map {|sym| s(:arg, sym)}
    @ngClassUses, @ngClassOmit = [], []

   s(:block, s(:send, @ngApp, :factory,
      s(:sym, name.children.last)), s(:args, *args), 
      s(:begin, node, s(:return, s(:const, nil, name.children.last))))
  else
    super
  end
ensure
  @ngClassUses, @ngClassOmit = [], []
  @ngContext = ngContext
end

#on_const(node) ⇒ Object 



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# File 'lib/ruby2js/filter/angularrb.rb', line 568

def on_const(node)
  if @ngClassUses and not node.children.first
    unless BUILTINS.include? node.children.last
      @ngClassUses << node.children.last
    end
  end

  super
end

#on_cvar(node) ⇒ Object

convert cvar referencess in controllers to self



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# File 'lib/ruby2js/filter/angularrb.rb', line 361

def on_cvar(node)
  if @ngContext == :controller
    process s(:attr, s(:self), node.children.first.to_s[2..-1])
  else
    super
  end
end

#on_cvasgn(node) ⇒ Object

convert cvar assignments in controllers to self



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# File 'lib/ruby2js/filter/angularrb.rb', line 437

def on_cvasgn(node)
  if @ngContext == :controller
    if node.children.length == 1
      process s(:attr, s(:self), "#{node.children.first.to_s[2..-1]}")
    else
      process s(:send, s(:self), "#{node.children.first.to_s[2..-1]}=",
        node.children.last)
    end
  else
    super
  end
end

#on_def(node) ⇒ Object

convert instance method definitions in controllers to $scope



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# File 'lib/ruby2js/filter/angularrb.rb', line 543

def on_def(node)
  if @ngContext == :controller
    if node.is_method?
      process s(:defs, s(:gvar, :$scope), *node.children)
    else
      process s(:defp, s(:gvar, :$scope), *node.children)
    end
  else
    super
  end
end

#on_gvar(node) ⇒ Object 



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# File 'lib/ruby2js/filter/angularrb.rb', line 555

def on_gvar(node)
  return @ngScope if node.children.first == :$scope and @ngScope
  
  if @ngClassUses
    @ngClassUses << node.children.first
  end

  super
end

#on_ivar(node) ⇒ Object

convert ivar referencess in controllers to $scope



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# File 'lib/ruby2js/filter/angularrb.rb', line 352

def on_ivar(node)
  if @ngContext == :controller
    process s(:attr, s(:gvar, :$scope), node.children.first.to_s[1..-1])
  else
    super
  end
end

#on_ivasgn(node) ⇒ Object

convert ivar assignments in controllers to $scope



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# File 'lib/ruby2js/filter/angularrb.rb', line 422

def on_ivasgn(node)
  if @ngContext == :controller
    if node.children.length == 1
      process s(:attr, s(:gvar, :$scope),
        "#{node.children.first.to_s[1..-1]}")
    else
      process s(:send, s(:gvar, :$scope),
        "#{node.children.first.to_s[1..-1]}=", node.children.last)
    end
  else
    super
  end
end

#on_module(node) ⇒ Object

input:

module Angular::AppName
  use :Dependency
  ...
end

output:

AppName = angular.module("AppName", ["Dependency"])
...



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# File 'lib/ruby2js/filter/angularrb.rb', line 55

def on_module(node)
  ngContext, @ngContext = @ngContext, :module
  @ngModule = node.children
  if @ngModule.last and @ngModule.last.type == :begin
    @ngModule = @ngModule.last.children
  end
  module_name = node.children[0]
  parent_name = module_name.children[0]

  return super unless parent_name == Angular

  @ngApp = s(:lvar, module_name.children[1])
  @ngChildren = node.children[1..-1]
  while @ngChildren.length == 1 and @ngChildren.first and @ngChildren.first.type == :begin
    @ngChildren = @ngChildren.first.children.dup
  end
  @ngAppUses = []

  block = process_all(node.children[1..-1])

  # convert use calls into dependencies
  depends = @ngAppUses.map {|sym| s(:sym, sym)} + extract_uses(block)
  depends = depends.map {|node| node.children.first.to_s}.uniq.
    map {|sym| s(:str, sym)}

  ngApp, @ngApp, @ngChildren = @ngApp, nil, nil
  name = module_name.children[1].to_s

  # construct app
  app = s(:send, s(:lvar, :angular), :module, 
    s(:str, name), s(:array, *depends.uniq))

  # return a single chained statement when there is only one call
  block.compact!
  if block.length == 0
    return app
  elsif block.length == 1
    call = block.first.children.first
    if block.first.type == :send and call == ngApp
      return block.first.updated nil, [app, *block.first.children[1..-1]]
    elsif block.first.type == :block and call.children.first == ngApp
      call = call.updated nil, [app, *call.children[1..-1]]
      return block.first.updated nil, [call, *block.first.children[1..-1]]
    end
  end

  # replace module with a constant assign followed by the module
  # contents all wrapped in an anonymous function
  s(:send, s(:block, s(:send, nil, :lambda), s(:args),
    s(:begin, s(:casgn, nil, name, app), *block)), :[])
ensure
  @ngContext = ngContext
end

#on_pair(node) ⇒ Object

convert instance method definitions in controllers to $scope



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# File 'lib/ruby2js/filter/angularrb.rb', line 521

def on_pair(node)
  if @ngContext == :directive and node.children[0] == s(:sym, :link)
    begin
      ngScope = @ngScope
      if node.children[1].type == :block
        args = node.children[1].children[1]
        if args.children.length > 0
          @ngScope = s(:lvar, args.children[0].children[0])
          @ngContext = :controller
        end
      end
      super
    ensure
      @ngScope = ngScope
      @ngContext = :directive
    end
  else
    super
  end
end

#on_send(node) ⇒ Object 



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# File 'lib/ruby2js/filter/angularrb.rb', line 466

def on_send(node)
  if @ngContext == :controller
    if node.children[0..1] == [nil, :interpolate] and @ngScope
      @ngClassUses << :$interpolate
      if node.children.length > 3 and node.children[3].type == :nil
        return process node.updated nil, [nil, :$interpolate, 
          node.children[2]]
      else
        return process s(:send, s(:send, nil, :$interpolate, 
          *node.children[2..-1]), nil, @ngScope)
      end

    elsif node.children[0..1] == [nil, :compile] and @ngScope

      @ngClassUses << :$compile
      if node.children.length > 3 and node.children.last.type == :nil
        return process node.updated nil, [nil, :$compile, 
          *node.children[2..-2]]
      else
        return process s(:send, s(:send, nil, :$compile, 
          *node.children[2..-1]), nil, @ngScope)
      end
    end

    # map well known method names to the appropriate service
    scope, method = NG_METHOD_MAP[node.children[1]]

    return super unless node.children.first == nil and method

    scope = s(:gvar, scope) if scope
    process s(:gvar, method) unless scope

    process node.updated nil, [scope, method, *node.children[2..-1]]

  elsif @ngContext == :module and node.children[0]
    return super unless @ngModule.include? node
    child = node
    while child and child.type == :send
      child = child.children[0]
    end

    # singleton configuration syntax
    return super unless child and (child.type == :gvar or 
      (child.type == :const and child.children[0] == nil))

    service = child.children.last
    s(:send, @ngApp, :config, s(:array, s(:str, service.to_s), s(:block, 
      s(:send, nil, :proc), s(:args, s(:arg, service)), node)))

  else
    super
  end
end