1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
|
# -*- 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 __future__ import annotations
from tempfile import TemporaryDirectory
from ..interfaces.IElement import BaseElementProtocol
from ..paths import Path
from ..transforms import Transform, BoundingBox
from ..command import inkscape, write_svg
from ._base import BaseElement, ShapeElement
from ._polygons import PathElementBase
class TextBBMixin: # pylint: disable=too-few-public-methods
"""Mixin to query the bounding box from Inkscape
.. versionadded:: 1.2"""
def get_inkscape_bbox(self: BaseElementProtocol) -> BoundingBox:
"""Query the bbbox of a single object. This calls the Inkscape command,
so it is rather slow to use in a loop."""
with TemporaryDirectory(prefix="inkscape-command") as tmpdir:
svg_file = write_svg(self.root, tmpdir, "input.svg")
out = inkscape(svg_file, "-X", "-Y", "-W", "-H", query_id=self.get_id())
out = list(map(self.root.viewport_to_unit, out.splitlines()))
if len(out) != 4:
raise ValueError("Error: Bounding box computation failed")
return BoundingBox.new_xywh(*out)
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, TextBBMixin):
"""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, TextBBMixin):
"""A Text element"""
tag_name = "text"
x = property(lambda self: self.to_dimensionless(self.get("x", 0)))
y = property(lambda self: self.to_dimensionless(self.get("y", 0)))
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, TextBBMixin):
"""A textPath element"""
tag_name = "textPath"
def get_path(self):
return Path()
class Tspan(ShapeElement, TextBBMixin):
"""A tspan text element"""
tag_name = "tspan"
x = property(lambda self: self.to_dimensionless(self.get("x", 0)))
y = property(lambda self: self.to_dimensionless(self.get("y", 0)))
@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 = self.to_dimensionless(self.style.get("font-size", "12px"))
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"
|
