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# coding: UTF8
# Copyright 2009 Thomas Jourdan
#
# 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 3 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 St, Fifth Floor, Boston, MA 02110-1301 USA
import os
import random
import cairo
import model_random
import model_locus
import model_allele
import model_constraintpool
from gettext import gettext as _
FONTSIZE_CONSTRAINT = 'fontsizeconstraint'
class GlyphStamp(model_allele.Allele):
"""GlyphStamp:.
inv: self.size >= 0.0
inv: len(unichrtab) == len(self.mapping)
inv: forall(self.mapping, lambda x: x >= 0 and x < len(unichrtab))
"""
cdef = [{'bind' : FONTSIZE_CONSTRAINT,
'name' : 'Font size in percent of the drawing area.',
'domain': model_constraintpool.INT_RANGE,
'min' : 0.01, 'max': 1.0},
]
def __init__(self, trunk):
"""Constructor for a flip merger."""
super(GlyphStamp, self).__init__(trunk)
cpool = model_constraintpool.ConstraintPool.get_pool()
self.size = cpool.get(self, FONTSIZE_CONSTRAINT)[0]
self.mapping = [ix for ix in range(len(unichrtab))]
def __eq__(self, other):
"""Equality based on radius."""
equal = isinstance(other, GlyphStamp) \
and self.size == other.size
if equal:
for cix, value in enumerate(self.mapping):
equal = equal and value == other.mapping[cix]
return equal
def randomize(self):
"""Randomize the layers components."""
cpool = model_constraintpool.ConstraintPool.get_pool()
random.shuffle(self.mapping)
size_constraint = cpool.get(self, FONTSIZE_CONSTRAINT)
self.size = model_random.uniform_constrained(size_constraint)
def mutate(self):
"""Make small random changes to the layers components."""
cpool = model_constraintpool.ConstraintPool.get_pool()
size_constraint = cpool.get(self, FONTSIZE_CONSTRAINT)
self.size = model_random.jitter_constrained(self.size, size_constraint)
def swap_places(self):
"""Shuffle mapping table."""
model_random.swap_places(self.mapping)
for dummy in range(len(unichrtab) / 20):
model_random.swap_places(self.mapping)
def crossingover(self, other):
"""
pre: isinstance(other, GlyphStamp)
pre: isinstance(self, GlyphStamp)
# check for distinct references, needs to copy content, not references
post: __return__ is not self
post: __return__ is not other
post: model_locus.unique_check(__return__, self, other) == ''
"""
new_one = GlyphStamp(self.get_trunk())
cross_sequence = model_random.crossing_sequence(1)
new_one.size = self.size if cross_sequence[0] else other.size
new_one.mapping = model_random.crossingover_nativeelement_list(
self.mapping,
other.mapping)
return new_one
def set_extent(self, width, height):
"""Set extent of stamp. Some stamps will ignore this."""
pass
def render(self, ctx, point, rad=0.1, state=0):
"""
pre: ctx is not None
pre: len(point) == 2
"""
uc = unichr(unichrtab[self.mapping[state % len(unichrtab)]])
ctx.select_font_face('Sans',
cairo.FONT_SLANT_NORMAL, cairo.FONT_WEIGHT_BOLD)
ctx.set_font_size(self.size)
x_bearing, y_bearing, width, height = ctx.text_extents(uc)[:4]
ctx.move_to(point[0] - width / 2 - x_bearing,
point[1] - height / 2 - y_bearing)
ctx.show_text(uc)
def explain(self):
"""
post: len(__return__) == 3
"""
return u'A collection of characters: ', \
None, \
None
def copy(self):
"""A copy constructor.
post: isinstance(__return__, GlyphStamp)
# check for distinct references, needs to copy content, not references
post: len(__return__.mapping) == len(self.mapping)
post: __return__ is not self
"""
new_one = GlyphStamp(self.get_trunk())
new_one.mapping = [self.mapping[ix] for ix in range(len(self.mapping))]
new_one.size = self.size
return new_one
unichrtab = (
0x00a4,
0x00ac,
0x00b1,
0x00b5,
0x00b6,
0x00bc,
0x00bd,
0x00be,
0x00c6,
0x00d8,
0x00e6,
0x00f8,
0x013d,
0x013f,
0x0152,
0x0153,
0x0192,
0x0402,
0x0409,
0x040a,
0x0428,
0x0429,
0x042d,
0x042e,
0x0431,
0x0444,
0x044d,
0x044e,
0x0459,
0x0498,
0x04b4,
0x04be,
0x04c1,
0x04d4,
0x04d5,
0x04da,
0x04dc,
0x04de,
0x04f4,
0x2021,
0x2202,
0x2206,
0x2211,
0x221a,
0x221e,
0x2260,
)
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