lighttroupe/luz

multi_require 'pango', 'cairo_font'

class ActorEffectText < ActorEffect
    title                "Text"
    description "Apply text to actor."

    categories :color

    setting 'text', :string, :multiline => true, :on_change => :not_drawn!

    setting 'font', :font, :on_change => :not_drawn!

    #setting 'font_size', :float, :default => 0.1..1.0, :range => 0.0..1.0, :simple => true, :on_change => :not_drawn!

    ALIGNMENT_OPTIONS = [[:left, 'Left'], [:center, 'Center'], [:right, 'Right']]
    setting 'font_alignment', :select, :default => :center, :options => ALIGNMENT_OPTIONS, :on_change => :not_drawn!

    #setting 'border_left', :float, :default => 0.0..1.0, :range => -1000.0..1000.0, :on_change => :not_drawn!
    #setting 'border_top', :float, :default => 0.0..1.0, :range => -1000.0..1000.0, :on_change => :not_drawn!

    setting 'lines', :integer, :default => 1..10, :range => 1..100, :on_change => :not_drawn!
    setting 'line_spacing', :float, :default => 0.0..1.0, :range => -1.0..1.0, :simple => true, :on_change => :not_drawn!

    boolean_accessor :drawn

    def render
        image = render_text(font, text)
        return yield unless image

        image.using {
            yield
        }
    end

    def deep_clone(*args)
        @canvas = nil
        @image = nil
        not_drawn!
        super(*args)
    end

    #
    # TODO: move elsewhere
    #
    def render_text(font, text)
        @cairo_font ||= CairoFont.new
        unless drawn?
            @image = @cairo_font.render_to_image(text, font, width, lines, font_alignment)
            drawn!
        end
        @image
    end

    def width
        20
    end
end