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Contents
require_relative 'module'
module Frameit
# Represents the MiniMagick trim bounding box for cropping a text image
class Trimbox
attr_accessor :width # width of the trim box
attr_accessor :height # height of the trim box
attr_accessor :offset_x # horizontal offset from the canvas to the trim box
attr_accessor :offset_y # vertical offset from the canvas to the trim box
# identify_string: A string with syntax "<width>x<height>+<offset_x>+<offset_y>". This is returned by MiniMagick when using function .identify with format("%@"). It is also required for the MiniMagick .crop function.
def initialize(identify_string)
UI.user_error!("Trimbox cannot be initialised with an empty 'identify_string'.") unless identify_string.length > 0
# Parse the input syntax "<width>x<height>+<offset_x>+<offset_y>".
# Extract these 4 parameters into an integer array, by using multiple string separators: "x" and "+":
trim_values = identify_string.split(/[x+]/).map(&:to_i)
# If 'identify_string' doesn't have the expected syntax with 4 parameters, show error:
UI.user_error!("Trimbox is initialised with an invalid value for 'identify_string'.") unless trim_values.length == 4
# Assign instance variables:
@width = trim_values[0]
@height = trim_values[1]
@offset_x = trim_values[2]
@offset_y = trim_values[3]
end
# Get the trimbox parameters in the MiniMagick string format
def string_format
# Convert trim box parameters to string with syntax: "<width>x<height>+<offset_x>+<offset_y>":
return "#{@width}x#{@height}+#{@offset_x}+#{@offset_y}"
end
# Get the trimbox parameters in a human readable JSON string format
def json_string_format
# Create a JSON string from the trim box parameters:
return "{\"width\" : #{@width}, \"height\" : #{@height} , \"offset_x\" : #{@offset_x}, \"offset_y\" : #{@offset_y}}"
end
end
end
Version data entries
10 entries across 10 versions & 1 rubygems