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Contents
module Prawn::SVG::Attributes::Transform
def parse_transform_attribute_and_call
return unless transform = attributes['transform']
parse_css_method_calls(transform).each do |name, arguments|
case name
when 'translate'
x, y = arguments
add_call_and_enter name, x_pixels(x.to_f), -y_pixels(y.to_f)
when 'rotate'
r, x, y = arguments.collect {|a| a.to_f}
case arguments.length
when 1
add_call_and_enter name, -r, :origin => [0, y('0')]
when 3
add_call_and_enter name, -r, :origin => [x(x), y(y)]
else
warnings << "transform 'rotate' must have either one or three arguments"
end
when 'scale'
x_scale = arguments[0].to_f
y_scale = (arguments[1] || x_scale).to_f
add_call_and_enter "transformation_matrix", x_scale, 0, 0, y_scale, 0, 0
when 'matrix'
if arguments.length != 6
warnings << "transform 'matrix' must have six arguments"
else
a, b, c, d, e, f = arguments.collect {|argument| argument.to_f}
add_call_and_enter "transformation_matrix", a, -b, -c, d, x_pixels(e), -y_pixels(f)
end
else
warnings << "Unknown transformation '#{name}'; ignoring"
end
end
end
private
def parse_css_method_calls(string)
string.scan(/\s*(\w+)\(([^)]+)\)\s*/).collect do |call|
name, argument_string = call
arguments = argument_string.strip.split(/\s*[,\s]\s*/)
[name, arguments]
end
end
end
Version data entries
9 entries across 9 versions & 1 rubygems