1 | <?php
|
---|
2 | /**
|
---|
3 | * Html2Pdf Library - parsing Html class
|
---|
4 | *
|
---|
5 | * HTML => PDF converter
|
---|
6 | * distributed under the OSL-3.0 License
|
---|
7 | *
|
---|
8 | * @package Html2pdf
|
---|
9 | * @author Laurent MINGUET <webmaster@html2pdf.fr>
|
---|
10 | * @copyright 2017 Laurent MINGUET
|
---|
11 | */
|
---|
12 | namespace Spipu\Html2Pdf\Parsing;
|
---|
13 |
|
---|
14 | use Spipu\Html2Pdf\Exception\HtmlParsingException;
|
---|
15 |
|
---|
16 | /**
|
---|
17 | * Class TagParser
|
---|
18 | */
|
---|
19 | class TagParser
|
---|
20 | {
|
---|
21 | protected $level; // table level
|
---|
22 | protected $num = 0; // table number
|
---|
23 | protected $textParser;
|
---|
24 |
|
---|
25 | public function __construct(TextParser $textParser)
|
---|
26 | {
|
---|
27 | $this->textParser = $textParser;
|
---|
28 | $this->level = array($this->num);
|
---|
29 | }
|
---|
30 |
|
---|
31 | /**
|
---|
32 | * analyze a HTML tag
|
---|
33 | *
|
---|
34 | * @param string $code HTML code to analyze
|
---|
35 | *
|
---|
36 | * @return Node corresponding action
|
---|
37 | * @throws HtmlParsingException
|
---|
38 | */
|
---|
39 | public function analyzeTag($code)
|
---|
40 | {
|
---|
41 | // name of the tag, opening, closure, autoclosure
|
---|
42 | $tag = '<([\/]{0,1})([_a-z0-9]+)([\/>\s]+)';
|
---|
43 | if (!preg_match('/'.$tag.'/isU', $code, $match)) {
|
---|
44 | $e = new HtmlParsingException('The HTML tag ['.$code.'] provided is invalid');
|
---|
45 | $e->setInvalidTag($code);
|
---|
46 | throw $e;
|
---|
47 | }
|
---|
48 | $close = ($match[1] === '/' ? true : false);
|
---|
49 | $autoclose = preg_match('/\/>$/isU', $code);
|
---|
50 | $name = strtolower($match[2]);
|
---|
51 |
|
---|
52 | // required parameters (depends on the tag name)
|
---|
53 | $defaultParams = array();
|
---|
54 | $defaultParams['style'] = '';
|
---|
55 | if ($name === 'img') {
|
---|
56 | $defaultParams['alt'] = '';
|
---|
57 | $defaultParams['src'] = '';
|
---|
58 | } elseif ($name === 'a') {
|
---|
59 | $defaultParams['href'] = '';
|
---|
60 | }
|
---|
61 |
|
---|
62 | $param = array_merge($defaultParams, $this->extractTagAttributes($code));
|
---|
63 | $param['style'] = trim($param['style']);
|
---|
64 | if (strlen($param['style']) > 0 && substr($param['style'], -1) !== ';') {
|
---|
65 | $param['style'].= ';';
|
---|
66 | }
|
---|
67 |
|
---|
68 | // compliance of each parameter
|
---|
69 | $color = "#000000";
|
---|
70 | $border = null;
|
---|
71 | foreach ($param as $key => $val) {
|
---|
72 | switch ($key) {
|
---|
73 | case 'width':
|
---|
74 | unset($param[$key]);
|
---|
75 | $param['style'] .= 'width: '.$val.'px; ';
|
---|
76 | break;
|
---|
77 |
|
---|
78 | case 'align':
|
---|
79 | if ($name === 'img') {
|
---|
80 | unset($param[$key]);
|
---|
81 | $param['style'] .= 'float: '.$val.'; ';
|
---|
82 | } elseif ($name !== 'table') {
|
---|
83 | unset($param[$key]);
|
---|
84 | $param['style'] .= 'text-align: '.$val.'; ';
|
---|
85 | }
|
---|
86 | break;
|
---|
87 |
|
---|
88 | case 'valign':
|
---|
89 | unset($param[$key]);
|
---|
90 | $param['style'] .= 'vertical-align: '.$val.'; ';
|
---|
91 | break;
|
---|
92 |
|
---|
93 | case 'height':
|
---|
94 | unset($param[$key]);
|
---|
95 | $param['style'] .= 'height: '.$val.'px; ';
|
---|
96 | break;
|
---|
97 |
|
---|
98 | case 'bgcolor':
|
---|
99 | unset($param[$key]);
|
---|
100 | $param['style'] .= 'background: '.$val.'; ';
|
---|
101 | break;
|
---|
102 |
|
---|
103 | case 'bordercolor':
|
---|
104 | unset($param[$key]);
|
---|
105 | $color = $val;
|
---|
106 | break;
|
---|
107 |
|
---|
108 | case 'border':
|
---|
109 | unset($param[$key]);
|
---|
110 | if (preg_match('/^[0-9]+$/isU', $val)) {
|
---|
111 | $val = $val.'px';
|
---|
112 | }
|
---|
113 | $border = $val;
|
---|
114 | break;
|
---|
115 |
|
---|
116 | case 'cellpadding':
|
---|
117 | case 'cellspacing':
|
---|
118 | if (preg_match('/^([0-9]+)$/isU', $val)) {
|
---|
119 | $param[$key] = $val.'px';
|
---|
120 | }
|
---|
121 | break;
|
---|
122 |
|
---|
123 | case 'colspan':
|
---|
124 | case 'rowspan':
|
---|
125 | $val = preg_replace('/[^0-9]/isU', '', $val);
|
---|
126 | if (!$val) {
|
---|
127 | $val = 1;
|
---|
128 | }
|
---|
129 | $param[$key] = (int) $val;
|
---|
130 | break;
|
---|
131 |
|
---|
132 | case 'color':
|
---|
133 | if ($name === 'font') {
|
---|
134 | unset($param[$key]);
|
---|
135 | $param['style'] .= 'color: '.$val.'; ';
|
---|
136 | }
|
---|
137 | break;
|
---|
138 | }
|
---|
139 | }
|
---|
140 |
|
---|
141 | // compliance of the border
|
---|
142 | if ($border !== null) {
|
---|
143 | if ($border && $border !== '0px') {
|
---|
144 | $border = 'solid '.$border.' '.$color;
|
---|
145 | } else {
|
---|
146 | $border = 'none';
|
---|
147 | }
|
---|
148 |
|
---|
149 | $param['style'] .= 'border: '.$border.'; ';
|
---|
150 | $param['border'] = $border;
|
---|
151 | }
|
---|
152 |
|
---|
153 | // reading styles: decomposition and standardization
|
---|
154 | $styles = explode(';', $param['style']);
|
---|
155 | $param['style'] = array();
|
---|
156 | foreach ($styles as $style) {
|
---|
157 | $tmp = explode(':', $style);
|
---|
158 | if (count($tmp) > 1) {
|
---|
159 | $cod = $tmp[0];
|
---|
160 | unset($tmp[0]);
|
---|
161 | $tmp = implode(':', $tmp);
|
---|
162 | $param['style'][trim(strtolower($cod))] = preg_replace('/[\s]+/isU', ' ', trim($tmp));
|
---|
163 | }
|
---|
164 | }
|
---|
165 |
|
---|
166 | // determining the level of table opening, with an added level
|
---|
167 | if (in_array($name, array('ul', 'ol', 'table')) && !$close) {
|
---|
168 | $this->num++;
|
---|
169 | array_push($this->level, $this->num);
|
---|
170 | }
|
---|
171 |
|
---|
172 | // get the level of the table containing the element
|
---|
173 | if (!isset($param['num'])) {
|
---|
174 | $param['num'] = end($this->level);
|
---|
175 | }
|
---|
176 |
|
---|
177 | // for closures table: remove a level
|
---|
178 | if (in_array($name, array('ul', 'ol', 'table')) && $close) {
|
---|
179 | array_pop($this->level);
|
---|
180 | }
|
---|
181 |
|
---|
182 | // prepare the parameters
|
---|
183 | if (isset($param['value'])) {
|
---|
184 | $keepSpaces = in_array($name, array('qrcode', 'barcode'));
|
---|
185 | $param['value'] = $this->textParser->prepareTxt($param['value'], !$keepSpaces);
|
---|
186 | }
|
---|
187 | if (isset($param['alt'])) {
|
---|
188 | $param['alt'] = $this->textParser->prepareTxt($param['alt']);
|
---|
189 | }
|
---|
190 | if (isset($param['title'])) {
|
---|
191 | $param['title'] = $this->textParser->prepareTxt($param['title']);
|
---|
192 | }
|
---|
193 | if (isset($param['class'])) {
|
---|
194 | $param['class'] = $this->textParser->prepareTxt($param['class']);
|
---|
195 | }
|
---|
196 |
|
---|
197 | // return the new action to do
|
---|
198 | return new Node($name, $param, $close, $autoclose);
|
---|
199 | }
|
---|
200 |
|
---|
201 | /**
|
---|
202 | * Extract the list of attribute => value inside an HTML tag
|
---|
203 | *
|
---|
204 | * @param string $code The full HTML tag to parse
|
---|
205 | *
|
---|
206 | * @return array
|
---|
207 | */
|
---|
208 | public function extractTagAttributes($code)
|
---|
209 | {
|
---|
210 | $param = array();
|
---|
211 | $regexes = array(
|
---|
212 | '([a-zA-Z0-9_]+)=([^"\'\s>]+)', // read the parameters : name=value
|
---|
213 | '([a-zA-Z0-9_]+)=["]([^"]*)["]', // read the parameters : name="value"
|
---|
214 | "([a-zA-Z0-9_]+)=[']([^']*)[']" // read the parameters : name='value'
|
---|
215 | );
|
---|
216 |
|
---|
217 | foreach ($regexes as $regex) {
|
---|
218 | preg_match_all('/'.$regex.'/is', $code, $match);
|
---|
219 | $amountMatch = count($match[0]);
|
---|
220 | for ($k = 0; $k < $amountMatch; $k++) {
|
---|
221 | $param[trim(strtolower($match[1][$k]))] = trim($match[2][$k]);
|
---|
222 | }
|
---|
223 | }
|
---|
224 |
|
---|
225 | return $param;
|
---|
226 | }
|
---|
227 | }
|
---|