e2pdf / vendors / svggraph / PathData.php

PathData.php in E2Pdf – Export Pdf Tool for WordPress 1.32.49, at vendors/svggraph/PathData.php

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1	<?php
2	/**
3	* Copyright (C) 2019-2022 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	* Data class for SVG path data
26	*/
27	class PathData {
28
29	private $parts = '';
30	private $last = '';
31
32	/**
33	* Constructs a path from another PathData, elements or an array of elements
34	*/
35	public function __construct()
36	{
37	$segments = func_get_args();
38	$num = count($segments);
39	if($num) {
40	if($num > 1) {
41	$this->add($segments);
42	return;
43	}
44
45	$this->add($segments[0]);
46	}
47	}
48
49	/**
50	* Adds segments to the path
51	*/
52	public function add($e)
53	{
54	$segments = func_get_args();
55	if(count($segments) < 1)
56	throw new \Exception('No segments to add');
57
58	if(count($segments) == 1) {
59	$e = $segments[0];
60
61	// add another PathData
62	if(is_object($e) && get_class($e) === 'Goat1000\\SVGGraph\\PathData') {
63	$this->parts .= ' ' . $e->parts;
64	$this->last = $e->last;
65	return;
66	}
67
68	if(is_array($e))
69	$segments = $e;
70	}
71
72	$this->addSegments($segments);
73	}
74
75	/**
76	* Returns true if the path has no segments
77	*/
78	public function isEmpty()
79	{
80	return $this->parts === '';
81	}
82
83	/**
84	* Clears any existing segments
85	*/
86	public function clear()
87	{
88	$this->parts = '';
89	$this->last = '';
90	}
91
92	/**
93	* Converts the path segments to a string
94	*/
95	public function __toString()
96	{
97	// already contains a string, this just reduces whitespace
98	return preg_replace(['/ ([a-zA-Z])/', '/([a-zA-Z]) /'], '$1', $this->parts);
99	}
100
101	/**
102	* Adds an array of segments
103	*/
104	private function addSegments($segments)
105	{
106	$last = $this->last;
107	$parts = '';
108	foreach($segments as $part) {
109
110	if(is_object($part)) {
111	if(get_class($part) === 'Goat1000\\SVGGraph\\PathData')
112	throw new \InvalidArgumentException('PathData in segment list. Use separate add() calls.');
113
114	$parts .= ' ' . $part;
115	continue;
116	}
117
118	if(!is_numeric($part)) {
119	// skip duplicate path commands
120	if($part == $last)
121	continue;
122	$last = $part;
123	$parts .= $part;
124	continue;
125	}
126
127	$parts .= ' ' . new Number($part);
128	}
129
130	if($parts !== '') {
131	$this->last = $last;
132	$this->parts .= $parts;
133	}
134	}
135	}
136
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