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# -*- coding: utf-8 -*-
#
# Copyright (c) 2020 Martin Owens <doctormo@gmail.com>
# Thomas Holder <thomas.holder@schrodinger.com>
#
# 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.
#
# pylint: disable=arguments-differ
"""
Provide text based element classes interface.
Because text is not rendered at all, no information about a text's path
size or actual location can be generated yet.
"""
from ..paths import Path
from ..transforms import Transform, BoundingBox
from ..units import convert_unit
from ._base import BaseElement, ShapeElement
from ._polygons import PathElementBase
class FlowRegion(ShapeElement):
"""SVG Flow Region (SVG 2.0)"""
tag_name = 'flowRegion'
def get_path(self):
# This ignores flowRegionExcludes
return sum([child.path for child in self], Path())
class FlowRoot(ShapeElement):
"""SVG Flow Root (SVG 2.0)"""
tag_name = 'flowRoot'
@property
def region(self):
"""Return the first flowRegion in this flowRoot"""
return self.findone('svg:flowRegion')
def get_path(self):
region = self.region
return region.get_path() if region is not None else Path()
class FlowPara(ShapeElement):
"""SVG Flow Paragraph (SVG 2.0)"""
tag_name = 'flowPara'
def get_path(self):
# XXX: These empty paths mean the bbox for text elements will be nothing.
return Path()
class FlowDiv(ShapeElement):
"""SVG Flow Div (SVG 2.0)"""
tag_name = 'flowDiv'
def get_path(self):
# XXX: These empty paths mean the bbox for text elements will be nothing.
return Path()
class FlowSpan(ShapeElement):
"""SVG Flow Span (SVG 2.0)"""
tag_name = 'flowSpan'
def get_path(self):
# XXX: These empty paths mean the bbox for text elements will be nothing.
return Path()
class TextElement(ShapeElement):
"""A Text element"""
tag_name = 'text'
x = property(lambda self: convert_unit(self.get('x', 0), 'px'))
y = property(lambda self: convert_unit(self.get('y', 0), 'px'))
def get_path(self):
return Path()
def tspans(self):
"""Returns all children that are tspan elements"""
return self.findall('svg:tspan')
def get_text(self, sep="\n"):
"""Return the text content including tspans"""
nodes = [self] + list(self.tspans())
return sep.join([elem.text for elem in nodes if elem.text is not None])
def shape_box(self, transform=None):
"""
Returns a horrible bounding box that just contains the coord points
of the text without width or height (which is impossible to calculate)
"""
effective_transform = Transform(transform) * self.transform
x, y = effective_transform.apply_to_point((self.x, self.y))
bbox = BoundingBox(x, y)
for tspan in self.tspans():
bbox += tspan.bounding_box(effective_transform)
return bbox
class TextPath(ShapeElement):
"""A textPath element"""
tag_name = 'textPath'
def get_path(self):
return Path()
class Tspan(ShapeElement):
"""A tspan text element"""
tag_name = 'tspan'
x = property(lambda self: convert_unit(self.get('x', 0), 'px'))
y = property(lambda self: convert_unit(self.get('y', 0), 'px'))
@classmethod
def superscript(cls, text):
"""Adds a superscript tspan element"""
return cls(text, style="font-size:65%;baseline-shift:super")
def get_path(self):
return Path()
def shape_box(self, transform=None):
"""
Returns a horrible bounding box that just contains the coord points
of the text without width or height (which is impossible to calculate)
"""
effective_transform = Transform(transform) * self.transform
x1, y1 = effective_transform.apply_to_point((self.x, self.y))
fontsize = convert_unit(self.style.get('font-size', '1em'), 'px')
x2 = self.x + 0 # XXX This is impossible to calculate!
y2 = self.y + float(fontsize)
x2, y2 = effective_transform.apply_to_point((x2, y2))
return BoundingBox((x1, x2), (y1, y2))
class SVGfont(BaseElement):
"""An svg font element"""
tag_name = 'font'
class FontFace(BaseElement):
"""An svg font font-face element"""
tag_name = 'font-face'
class Glyph(PathElementBase):
"""An svg font glyph element"""
tag_name = 'glyph'
class MissingGlyph(BaseElement):
"""An svg font missing-glyph element"""
tag_name = 'missing-glyph'
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