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#!/usr/bin/env python3
# coding=utf-8
#
# Copyright (C) 2011 Felipe Correa da Silva Sanches
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
#
from typing import Union
import inkex
from inkex.localization import inkex_gettext as _
class SetupTypographyCanvas(inkex.EffectExtension):
"""Resizes the canvas and creates typography-relevant guidelines"""
def add_arguments(self, pars):
pars.add_argument("-e", "--emsize", type=int, default=1000)
pars.add_argument("-c", "--caps", type=int, default=700, help="Caps Height")
pars.add_argument("-x", "--xheight", type=int, default=500)
pars.add_argument("-a", "--ascender", type=int, default=750)
pars.add_argument("-d", "--descender", type=int, default=250)
def create_horizontal_guideline(
self, name: str, position: Union[int, float]
) -> inkex.BaseElement:
"""Create a horizontal guideline with name and position
Args:
name (str): the name of the guideline
position (Union[int, float]): the vertical position of the guideline
Returns:
inkex.BaseElement: the created guideline
"""
return self.svg.namedview.add_guide(
self.svg.viewbox_height - position, True, name
)
def effect(self):
# Get all the options
emsize = self.options.emsize
ascender = self.options.ascender
caps = self.options.caps
xheight = self.options.xheight
descender = self.options.descender
# Get access to main SVG document element
self.svg.set("width", str(emsize))
self.svg.set("height", str(emsize))
self.svg.set("viewBox", "0 0 " + str(emsize) + " " + str(emsize))
baseline = descender
# Create guidelines
self.create_horizontal_guideline(_("baseline"), baseline)
self.create_horizontal_guideline(_("ascender"), baseline + ascender)
self.create_horizontal_guideline(_("caps"), baseline + caps)
self.create_horizontal_guideline(_("xheight"), baseline + xheight)
self.create_horizontal_guideline(_("descender"), baseline - descender)
namedview = self.svg.namedview
namedview.set("inkscape:document-units", "px")
namedview.set("inkscape:cx", str(emsize / 2.0))
namedview.set("inkscape:cy", str(emsize / 2.0))
if __name__ == "__main__":
SetupTypographyCanvas().run()
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