e2pdf / vendors / svggraph / Markers.php

Markers.php in E2Pdf – Export Pdf Tool for WordPress 1.32.17, at vendors/svggraph/Markers.php

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1	<?php
2	/**
3	* Copyright (C) 2018-2022 Graham Breach
4	*
5	* This program is free software: you can redistribute it and/or modify
6	* it under the terms of the GNU Lesser General Public License as published by
7	* the Free Software Foundation, either version 3 of the License, or
8	* (at your option) any later version.
9	*
10	* This program is distributed in the hope that it will be useful,
11	* but WITHOUT ANY WARRANTY; without even the implied warranty of
12	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13	* GNU Lesser General Public License for more details.
14	*
15	* You should have received a copy of the GNU Lesser General Public License
16	* along with this program. If not, see <http://www.gnu.org/licenses/>.
17	*/
18	/**
19	* For more information, please contact <graham@goat1000.com>
20	*/
21
22	namespace Goat1000\SVGGraph;
23
24	/**
25	* Class for defining marker graphics as symbols
26	*/
27	class Markers {
28
29	private $graph;
30
31	public function __construct(&$graph)
32	{
33	$this->graph =& $graph;
34	}
35
36	/**
37	* Creates contents of a marker
38	*/
39	private function createContent($type, $size, $fill, $stroke_width,
40	$stroke_colour, $opacity, $angle, $more = null)
41	{
42	$marker = ['fill' => $fill];
43	if(!empty($stroke_colour) && $stroke_colour != 'none') {
44	$marker['stroke'] = $stroke_colour;
45	if(!empty($stroke_width))
46	$marker['stroke-width'] = $stroke_width;
47	}
48	if($opacity > 0.0 && $opacity < 1.0)
49	$marker['opacity'] = $opacity;
50
51	// check for custom or image markers
52	$content = null;
53	if($type[0] == '<') {
54	$content = $type;
55	$type = 'custom';
56	} elseif(strncmp($type, 'image:', 6) == 0) {
57	$svg_text = new Text($this->graph);
58	$image_path = $svg_text->substr($type, 6);
59	$type = 'image';
60	} elseif(strncmp($type, 'figure:', 7) == 0) {
61	$svg_text = new Text($this->graph);
62	$figure = $svg_text->substr($type, 7);
63	$type = 'figure';
64	}
65
66	$a = $size; // will be repeated a lot, and 'a' is smaller
67	$element = 'path';
68	switch($type) {
69	case 'triangle' :
70	$o = $a * tan(M_PI / 6);
71	$h = $a / cos(M_PI / 6);
72	$marker['d'] = new PathData('M', $a, $o, 'L', 0, -$h, 'L', -$a, $o, 'z');
73	break;
74	case 'diamond' :
75	$marker['d'] = new PathData('M', 0, -$a, 'L', $a, 0, 0, $a, -$a, 0, 'z');
76	break;
77	case 'square' :
78	$element = 'rect';
79	$marker['x'] = $marker['y'] = -$a;
80	$marker['width'] = $marker['height'] = $a * 2;
81	break;
82	case 'x' :
83	$xform = new Transform;
84	$xform->rotate(45);
85	$marker['transform'] = $xform;
86	// no break - 'x' is a cross rotated by 45 degrees
87	case 'cross' :
88	$t = $a / 4;
89	$marker['d'] = new PathData('M', -$a, -$t);
90	$marker['d']->add('L', -$a, $t, -$t, $t, -$t, $a);
91	$marker['d']->add($t, $a, $t, $t, $a, $t);
92	$marker['d']->add($a, -$t, $t, -$t, $t, -$a);
93	$marker['d']->add(-$t, -$a, -$t, -$t, 'z');
94	break;
95	case 'octagon' :
96	$t = $a * sin(M_PI / 8);
97	$marker['d'] = new PathData('M', $t, -$a);
98	$marker['d']->add('L', $a, -$t, $a, $t, $t, $a, -$t, $a);
99	$marker['d']->add(-$a, $t, -$a, -$t, -$t, -$a, 'z');
100	break;
101	case 'star' :
102	$t = $a * 0.382;
103	$x1 = $t * sin(M_PI * 0.8);
104	$y1 = $t * cos(M_PI * 0.8);
105	$x2 = $a * sin(M_PI * 0.6);
106	$y2 = $a * cos(M_PI * 0.6);
107	$x3 = $t * sin(M_PI * 0.4);
108	$y3 = $t * cos(M_PI * 0.4);
109	$x4 = $a * sin(M_PI * 0.2);
110	$y4 = $a * cos(M_PI * 0.2);
111	$marker['d'] = new PathData('M', 0, -$a);
112	$marker['d']->add('L', $x1, $y1, $x2, $y2, $x3, $y3, $x4, $y4, 0, $t);
113	$marker['d']->add(-$x4, $y4, -$x3, $y3, -$x2, $y2, -$x1, $y1, 'z');
114	break;
115	case 'threestar' :
116	$t = $a / 4;
117	$t1 = $t * cos(M_PI / 6);
118	$t2 = $t * sin(M_PI / 6);
119	$a1 = $a * cos(M_PI / 6);
120	$a2 = $a * sin(M_PI / 6);
121	$marker['d'] = new PathData('M', 0, -$a);
122	$marker['d']->add('L', $t1, -$t2, $a1, $a2, 0, $t);
123	$marker['d']->add(-$a1, $a2, -$t1, -$t2, 'z');
124	break;
125	case 'fourstar' :
126	$t = $a / 4;
127	$marker['d'] = new PathData('M', 0, -$a, 'L', $t, -$t, $a, 0, $t, $t);
128	$marker['d']->add(0, $a, -$t, $t, -$a, 0, -$t, -$t, 'z');
129	break;
130	case 'eightstar' :
131	$t = $a * sin(M_PI / 8);
132	$marker['d'] = new PathData('M', 0, -$t);
133	$marker['d']->add('L', $t, -$a, $t, -$t, $a, -$t, $t, 0);
134	$marker['d']->add($a, $t, $t, $t, $t, $a, 0, $t);
135	$marker['d']->add(-$t, $a, -$t, $t, -$a, $t, -$t, 0);
136	$marker['d']->add(-$a, -$t, -$t, -$t, -$t, -$a, 'z');
137	break;
138	case 'asterisk' :
139	$t = $a / 3;
140	$x1 = $a * sin(M_PI * 0.9);
141	$y1 = $a * cos(M_PI * 0.9);
142	$x2 = $t * sin(M_PI * 0.8);
143	$y2 = $t * cos(M_PI * 0.8);
144	$x3 = $a * sin(M_PI * 0.7);
145	$y3 = $a * cos(M_PI * 0.7);
146	$x4 = $a * sin(M_PI * 0.5);
147	$y4 = $a * cos(M_PI * 0.5);
148	$x5 = $t * sin(M_PI * 0.4);
149	$y5 = $t * cos(M_PI * 0.4);
150	$x6 = $a * sin(M_PI * 0.3);
151	$y6 = $a * cos(M_PI * 0.3);
152	$x7 = $a * sin(M_PI * 0.1);
153	$y7 = $a * cos(M_PI * 0.1);
154	$marker['d'] = new PathData('M', $x1, $y1);
155	$marker['d']->add('L', $x2, $y2, $x3, $y3, $x4, $y4, $x5, $y5);
156	$marker['d']->add($x6, $y6, $x7, $y7, 0, $t, -$x7, $y7);
157	$marker['d']->add(-$x6, $y6, -$x5, $y5, -$x4, $y4, -$x3, $y3);
158	$marker['d']->add(-$x2, $y2, -$x1, $y1, 'z');
159	break;
160	case 'pentagon' :
161	$x1 = $a * sin(M_PI * 0.4);
162	$y1 = $a * cos(M_PI * 0.4);
163	$x2 = $a * sin(M_PI * 0.2);
164	$y2 = $a * cos(M_PI * 0.2);
165	$marker['d'] = new PathData('M', 0, -$a);
166	$marker['d']->add('L', $x1, -$y1, $x2, $y2, -$x2, $y2, -$x1, -$y1, 'z');
167	break;
168	case 'hexagon' :
169	$x = $a * sin(M_PI / 3);
170	$y = $a * cos(M_PI / 3);
171	$marker['d'] = new PathData('M', 0, -$a);
172	$marker['d']->add('L', $x, -$y, $x, $y, 0, $a, -$x, $y, -$x, -$y, 'z');
173	break;
174	case 'image' :
175	$element = 'image';
176	$marker['xlink:href'] = $image_path;
177	$marker['x'] = $marker['y'] = -$size;
178	$marker['width'] = $size * 2;
179	$marker['height'] = $size * 2;
180	break;
181	case 'custom' :
182	$element = 'g';
183	break;
184	case 'figure' :
185	$element = 'g';
186	$figure_id = $this->graph->figures->getFigure($figure);
187	if(empty($figure_id))
188	throw new \Exception('Figure [' . $figure . '] not defined');
189	return [$figure_id];
190	break;
191	case 'circle' :
192	default :
193	$element = 'circle';
194	$marker['r'] = $size;
195	}
196
197	// angle happens here because the shape might already have a transform
198	if($angle != 0) {
199	$xform = new Transform;
200	$xform->rotate($angle);
201	if(isset($marker['transform']))
202	$marker['transform']->add($xform);
203	else
204	$marker['transform'] = $xform;
205	}
206
207	// extra attributes added at end
208	if(is_array($more))
209	$marker = array_merge($marker, $more);
210
211	return $this->graph->element($element, $marker, null, $content);
212	}
213
214	/**
215	* Creates a marker, returning its ID
216	*/
217	public function create($type, $size, $fill, $stroke_width, $stroke_colour,
218	$opacity, $angle, $more = null)
219	{
220	$marker_content = $this->createContent($type, $size, $fill, $stroke_width,
221	$stroke_colour, $opacity, $angle, $more);
222
223	// if the return is an array, it contains the ID
224	if(is_array($marker_content))
225	return $marker_content[0];
226	return $this->graph->defs->defineSymbol($marker_content);
227	}
228
229	/**
230	* Creates a SVG marker element, returning its ID
231	*/
232	public function createSVGMarker($type, $size, $fill, $stroke_width, $stroke_colour,
233	$opacity, $angle, $more = null)
234	{
235	$marker_content = $this->createContent($type, $size, $fill, $stroke_width,
236	$stroke_colour, $opacity, $angle, $more);
237
238	$sz = new Number($size);
239	$sz2 = new Number($size * 2);
240	$marker = [
241	'viewBox' => "-{$sz} -{$sz} {$sz2} {$sz2}",
242	'markerWidth' => $sz,
243	'markerHeight' => $sz,
244	'refX' => $sz,
245	'orient' => 'auto',
246	];
247	return $this->graph->defs->addElement('marker', $marker, $marker_content);
248	}
249	}
250
251