163 lines
6.2 KiB
Python
163 lines
6.2 KiB
Python
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#!/usr/bin/env python3
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'''
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BSD 3-Clause License
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Copyright (c) 2019, Pascal Wagler
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright notice, this
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list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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3. Neither the name of the copyright holder nor the names of its
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contributors may be used to endorse or promote products derived from
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this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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This Inkscape extension allows you to generate squared squares and squared rectangles from
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Bouwkamp codes and table codes.
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'''
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import re
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import inkex
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from lxml import etree
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class BouwkampCode(inkex.EffectExtension):
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"""
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This Inkscape extension allows you to generate squared squares and squared rectangles from
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Bouwkamp codes and table codes.
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"""
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def add_arguments(self, pars):
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pars.add_argument('--tab')
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pars.add_argument('--bouwkamp_code', default='21, 112, 112, [50, 35, 27], [8, 19], [15, 17, 11], [6, 24], [29, 25, 9, 2], [7, 18], [16], [42], [4, 37], [33]', help='The Bouwkamp code.'
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)
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pars.add_argument('--wrap_in_group', type=inkex.Boolean, default=True, help='Should the generated items be wrapped inside a group.'
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)
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def effect(self):
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# compute center of the view
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center = self.svg.namedview.center
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# create the group that holds all the elements
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container = self.svg.get_current_layer()
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if self.options.wrap_in_group:
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group_attributes = {
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inkex.addNS('label', 'inkscape'): 'BouwkampSquares',
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'transform': 'translate' + str(center)
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}
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group = etree.SubElement(self.svg.get_current_layer(), 'g', group_attributes)
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container = group
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# parse the bouwkamp code string as a list
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bouwkamp_code = self.parse_bouwkamp_code_from_string(self.options.bouwkamp_code)
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# show an error message and exit if the bouwkamp code is invalid
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try:
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self.exception_on_invalid_bouwkamp_code(bouwkamp_code)
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except ValueError as exception:
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inkex.errormsg(str(exception))
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return
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# draw the bouwkamp code
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self.draw_bouwkamp_code(container, center, bouwkamp_code)
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@staticmethod
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def exception_on_invalid_bouwkamp_code(bouwkamp_code):
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"""
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Raises a ValueError if the passed list is not a valid Bouwkamp code.
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"""
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if not bouwkamp_code: #len(bouwkamp_code) == 0
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raise ValueError('Error: Invalid Bouwkamp code.\n\nThe Bouwkamp code is emtpy. ' +
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'Please specify a valid Bouwkamp code.')
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if len(bouwkamp_code) - 3 != bouwkamp_code[0]:
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raise ValueError('Error: Invalid Bouwkamp code.\n\nThe Bouwkamp code has the wrong ' +
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'length. The first number needs to specify how many squares ' +
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'should be drawn.')
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@staticmethod
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def parse_bouwkamp_code_from_string(bouwkamp_code_string):
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"""
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Converts a Bouwkamp code string into a list of integers. Any parentheses, commas and
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spaces are stripped. Extended Bouwkamp codes are not supported.
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"""
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# replace every character (except numbers) with a space
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text = re.sub('[^0-9]', ' ', bouwkamp_code_string)
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# collapse all spaces to just one space
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text = re.sub(' {1,}', ' ', text).strip()
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# split the string into small strings and convert them to integers
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numbers = [int(x) for x in text.split(" ")]
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return numbers
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def draw_bouwkamp_code(self, parent, center, bouwkamp_code):
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"""
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Draws the passed Bouwkamp code (a list of integers) with rectangles.
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"""
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order = bouwkamp_code[0]
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width = bouwkamp_code[1]
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# height = bouwkamp_code[2]
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code = bouwkamp_code[3:] # cut the first three elements away
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i = 0
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helper = [0] * 900
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for rectangle in range(0, order):
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i = 0
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for j in range(1, width):
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if helper[j] < helper[i]:
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i = j
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position = (i, helper[i])
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dimension = (code[rectangle], code[rectangle])
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self.draw_rectangle(position, dimension, parent, center)
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for j in range(0, code[rectangle]):
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helper[i+j] += code[rectangle]
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def draw_rectangle(self, position, dimension, parent, center):
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rectangle_style = {
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'opacity': '1',
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'stroke': '#000000',
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'stroke-width': str(self.svg.unittouu('2px')),
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'fill': '#FFFFFF'
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}
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transform = ""
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if not self.options.wrap_in_group:
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transform = 'translate' + str(center)
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rectangle_attributes = {
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'transform': transform,
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'style': str(inkex.Style(rectangle_style)),
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inkex.addNS('label', 'inkscape'): "Rectangle "+str(dimension[0]),
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'x': str(position[0]),
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'y': str(position[1]),
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'width': str(dimension[0]),
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'height': str(dimension[1])
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}
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etree.SubElement(parent, inkex.addNS('rect', 'svg'), rectangle_attributes)
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if __name__ == '__main__':
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BouwkampCode().run()
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