Class: RVar

Inherits:
Object
  • Object
show all
Defined in:
lib/bull/reactive_var.rb

Constant Summary collapse

@@ticket = 
0
@@group = 
nil
@@backup = 
[]

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(value) ⇒ RVar

Returns a new instance of RVar.



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# File 'lib/bull/reactive_var.rb', line 10

def initialize value
    @value = value
    @blocks = {}
    @forms = Set.new
end

Instance Attribute Details

#value ⇒ Object

Returns the value of attribute value.



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# File 'lib/bull/reactive_var.rb', line 5

def value
  @value
end

Class Method Details

.raise_if_dirty ⇒ Object 



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# File 'lib/bull/reactive_var.rb', line 16

def self.raise_if_dirty
    @@group = Set.new
    @@backup = []
    raised = false
    begin
        yield
    rescue
        @@backup.each do |v|
            v.call
        end
        raised = true
        raise
    #else
    #    @@group.each do |blk|
    #        blk.call
    #    end
    ensure
        if !raised
            @@group.each do |blk|
                blk.call
            end
        end
        @@group = nil
        @@backup = []
    end
end

.rgrouping ⇒ Object 



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# File 'lib/bull/reactive_var.rb', line 43

def self.rgrouping
    @@group = Set.new
    yield
    @@group.each {|blk| blk.call}
    @@group = nil
    @@backup = []
end

Instance Method Details

#add(block) ⇒ Object 



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# File 'lib/bull/reactive_var.rb', line 65

def add block
    id = @@ticket
    @@ticket += 1
    @blocks[id] = block
    id
end

#add_form(form) ⇒ Object 



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# File 'lib/bull/reactive_var.rb', line 76

def add_form form
    @forms.add form
end

#remove(id) ⇒ Object 



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# File 'lib/bull/reactive_var.rb', line 72

def remove id
    @blocks.delete id
end

#remove_form(form) ⇒ Object 



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# File 'lib/bull/reactive_var.rb', line 80

def remove_form form
    @forms.delete form
end