/usr/lib/python3/dist-packages/blockdiag/drawer.py is in python3-blockdiag 1.4.7-1.
This file is owned by root:root, with mode 0o644.
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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 | # -*- coding: utf-8 -*-
# Copyright 2011 Takeshi KOMIYA
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from collections import defaultdict
from blockdiag import imagedraw, noderenderer
from blockdiag.metrics import AutoScaler, DiagramMetrics
class DiagramDraw(object):
shadow_colors = defaultdict(lambda: (0, 0, 0))
shadow_colors['PNG'] = (64, 64, 64)
shadow_colors['PDF'] = (144, 144, 144)
def __init__(self, _format, diagram, filename=None, **kwargs):
self.format = _format.upper()
self.diagram = diagram
self.fill = kwargs.get('fill', (0, 0, 0))
self.badgeFill = kwargs.get('badgeFill', 'pink')
self.filename = filename
self.shadow = self.shadow_colors[self.format.upper()]
if self.format == 'PNG' and kwargs.get('antialias'):
self.scale_ratio = 2
else:
self.scale_ratio = 1
self.drawer = imagedraw.create(self.format, self.filename,
filters=['linejump'],
scale_ratio=self.scale_ratio,
**kwargs)
self.metrics = self.create_metrics(kwargs.get('basediagram', diagram),
drawer=self.drawer,
fontmap=kwargs.get('fontmap'))
if self.scale_ratio == 2:
self.metrics = AutoScaler(self.metrics,
scale_ratio=self.scale_ratio)
self.drawer.set_canvas_size(self.pagesize())
self.drawer.set_options(jump_radius=self.metrics.cellsize / 2)
def create_metrics(self, *args, **kwargs):
return DiagramMetrics(*args, **kwargs)
@property
def nodes(self):
for node in self.diagram.traverse_nodes():
if node.drawable:
yield node
@property
def groups(self):
for group in self.diagram.traverse_groups(preorder=True):
if not group.drawable:
yield group
@property
def edges(self):
edges = self.diagram.traverse_edges(preorder=True)
for edge in (e for e in edges if e.style != 'none'):
yield edge
def pagesize(self, scaled=False):
if scaled:
metrics = self.metrics
else:
metrics = self.metrics.original_metrics
width = self.diagram.colwidth
height = self.diagram.colheight
return metrics.pagesize(width, height)
def draw(self, **kwargs):
# switch metrics object during draw backgrounds
temp, self.metrics = self.metrics, self.metrics.original_metrics
self._draw_background()
self.metrics = temp
if self.scale_ratio > 1:
pagesize = self.pagesize(scaled=True)
self.drawer.resizeCanvas(pagesize)
self._draw_elements(**kwargs)
def _draw_background(self):
# Draw node groups.
for group in self.groups:
if group.shape == 'box':
box = self.metrics.group(group).marginbox
if group.href and self.format == 'SVG':
drawer = self.drawer.anchor(group.href)
else:
drawer = self.drawer
drawer.rectangle(box, fill=group.color, filter='blur')
# Drop node shadows.
for node in self.nodes:
if node.color != 'none' and self.diagram.shadow_style != 'none':
r = noderenderer.get(node.shape)
shape = r(node, self.metrics)
if node.href and self.format == 'SVG':
drawer = self.drawer.anchor(node.href)
else:
drawer = self.drawer
shape.render(drawer, self.format,
fill=self.shadow, shadow=True,
style=self.diagram.shadow_style)
def _draw_elements(self, **kwargs):
for node in self.nodes:
self.node(node, **kwargs)
for edge in self.edges:
self.edge(edge)
for edge in self.edges:
self.edge_label(edge)
for group in self.groups:
if group.shape == 'line':
box = self.metrics.group(group).marginbox
self.drawer.rectangle(box, fill='none', outline=group.color,
style=group.style, thick=group.thick)
for node in self.groups:
self.group_label(node, **kwargs)
def node(self, node, **kwargs):
r = noderenderer.get(node.shape)
shape = r(node, self.metrics)
if node.href and self.format == 'SVG':
drawer = self.drawer.anchor(node.href)
else:
drawer = self.drawer
shape.render(drawer, self.format, fill=self.fill,
badgeFill=self.badgeFill)
def group_label(self, group):
m = self.metrics.group(group)
font = self.metrics.font_for(group)
if group.label and not group.separated:
self.drawer.textarea(m.grouplabelbox, group.label, font=font,
fill=group.textcolor)
elif group.label:
self.drawer.textarea(m.corebox, group.label, font=font,
fill=group.textcolor)
def edge(self, edge):
metrics = self.metrics.edge(edge)
for line in metrics.shaft.polylines:
self.drawer.line(line, fill=edge.color, thick=edge.thick,
style=edge.style, jump=True)
for head in metrics.heads:
if edge.hstyle in ('generalization', 'aggregation'):
self.drawer.polygon(head, outline=edge.color, fill='white')
else:
self.drawer.polygon(head, outline=edge.color, fill=edge.color)
def edge_label(self, edge):
if edge.label:
metrics = self.metrics.edge(edge)
font = self.metrics.font_for(edge)
self.drawer.textarea(metrics.labelbox, edge.label, font=font,
fill=edge.textcolor, outline=self.fill)
def save(self, size=None):
return self.drawer.save(self.filename, size, self.format)
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