wasinger /
htmlpagedom
Complex classes like HtmlPageCrawler often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes. You can also have a look at the cohesion graph to spot any un-connected, or weakly-connected components.
Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.
While breaking up the class, it is a good idea to analyze how other classes use HtmlPageCrawler, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 15 | class HtmlPageCrawler extends Crawler |
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| 16 | { |
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| 17 | /** |
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| 18 | * the (internal) root element name used when importing html fragments |
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| 19 | * */ |
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| 20 | const FRAGMENT_ROOT_TAGNAME = '_root'; |
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| 21 | |||
| 22 | /** |
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| 23 | * Get an HtmlPageCrawler object from a HTML string, DOMNode, DOMNodeList or HtmlPageCrawler |
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| 24 | * |
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| 25 | * Attention: Changed behavior since 2.0: |
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| 26 | * - If no content is passed, an empty HTML skeleton document will be created. |
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| 27 | * - It is no longer possible to create Crawler objects on an HTML fragment this way. Use createFragment() instead. |
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| 28 | * |
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| 29 | * @param string|HtmlPageCrawler|\DOMNode|\DOMNodeList|array|null $content |
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| 30 | * @return HtmlPageCrawler |
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| 31 | * @api |
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| 32 | */ |
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| 33 | 3 | public static function create($content = null) |
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| 34 | { |
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| 35 | 3 | if ($content instanceof HtmlPageCrawler) { |
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| 36 | return $content; |
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| 37 | } else { |
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| 38 | 3 | if ($content === null) { |
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| 39 | 1 | $content = '<html><body></body></html>'; |
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| 40 | } |
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| 41 | 3 | return new HtmlPageCrawler($content); |
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| 42 | } |
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| 43 | } |
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| 44 | |||
| 45 | /** |
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| 46 | * Adds the specified class(es) to each element in the set of matched elements. |
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| 47 | * |
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| 48 | * @param string $name One or more space-separated classes to be added to the class attribute of each matched element. |
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| 49 | * @return HtmlPageCrawler $this for chaining |
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| 50 | * @api |
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| 51 | */ |
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| 52 | 1 | public function addClass($name) |
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| 53 | { |
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| 54 | 1 | foreach ($this as $node) { |
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| 55 | 1 | if ($node instanceof \DOMElement) { |
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| 56 | /** @var \DOMElement $node */ |
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| 57 | 1 | $classes = preg_split('/\s+/s', $node->getAttribute('class')); |
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| 58 | 1 | $found = false; |
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| 59 | 1 | $count = count($classes); |
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| 60 | 1 | for ($i = 0; $i < $count; $i++) { |
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| 61 | 1 | if ($classes[$i] == $name) { |
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| 62 | 1 | $found = true; |
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| 63 | } |
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| 64 | } |
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| 65 | 1 | if (!$found) { |
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| 66 | 1 | $classes[] = $name; |
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| 67 | 1 | $node->setAttribute('class', trim(join(' ', $classes))); |
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| 68 | } |
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| 69 | } |
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| 70 | } |
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| 71 | 1 | return $this; |
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| 72 | } |
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| 73 | |||
| 74 | /** |
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| 75 | * Insert content, specified by the parameter, after each element in the set of matched elements. |
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| 76 | * |
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| 77 | * @param string|HtmlPageCrawler|\DOMNode|\DOMNodeList $content |
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| 78 | * @return HtmlPageCrawler $this for chaining |
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| 79 | * @api |
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| 80 | */ |
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| 81 | 1 | public function after($content) |
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| 82 | { |
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| 83 | 1 | $content = self::createFragmentCrawler($content); |
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| 84 | 1 | $newnodes = array(); |
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| 85 | 1 | foreach ($this as $i => $node) { |
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| 86 | /** @var \DOMNode $node */ |
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| 87 | 1 | $refnode = $node->nextSibling; |
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| 88 | 1 | foreach ($content as $newnode) { |
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| 89 | /** @var \DOMNode $newnode */ |
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| 90 | 1 | $newnode = static::importNewnode($newnode, $node, $i); |
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| 91 | 1 | if ($refnode === null) { |
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| 92 | 1 | $node->parentNode->appendChild($newnode); |
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| 93 | } else { |
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| 94 | $node->parentNode->insertBefore($newnode, $refnode); |
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| 95 | } |
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| 96 | 1 | $newnodes[] = $newnode; |
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| 97 | } |
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| 98 | } |
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| 99 | 1 | $content->clear(); |
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| 100 | 1 | $content->add($newnodes); |
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| 101 | 1 | return $this; |
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| 102 | } |
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| 103 | |||
| 104 | /** |
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| 105 | * Insert HTML content as child nodes of each element after existing children |
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| 106 | * |
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| 107 | * @param string|HtmlPageCrawler|\DOMNode|\DOMNodeList $content HTML code fragment or DOMNode to append |
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| 108 | * @return HtmlPageCrawler $this for chaining |
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| 109 | * @api |
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| 110 | */ |
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| 111 | 2 | public function append($content) |
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| 112 | { |
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| 113 | 2 | $content = self::createFragmentCrawler($content); |
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| 114 | 2 | $newnodes = array(); |
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| 115 | 2 | foreach ($this as $i => $node) { |
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| 116 | /** @var \DOMNode $node */ |
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| 117 | 2 | foreach ($content as $newnode) { |
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| 118 | /** @var \DOMNode $newnode */ |
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| 119 | 2 | $newnode = static::importNewnode($newnode, $node, $i); |
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| 120 | 2 | $node->appendChild($newnode); |
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| 121 | 2 | $newnodes[] = $newnode; |
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| 122 | } |
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| 123 | } |
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| 124 | 2 | $content->clear(); |
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| 125 | 2 | $content->add($newnodes); |
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| 126 | 2 | return $this; |
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| 127 | } |
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| 128 | |||
| 129 | /** |
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| 130 | * Insert every element in the set of matched elements to the end of the target. |
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| 131 | * |
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| 132 | * @param string|HtmlPageCrawler|\DOMNode|\DOMNodeList $element |
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| 133 | * @return \Wa72\HtmlPageDom\HtmlPageCrawler A new Crawler object containing all elements appended to the target elements |
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| 134 | * @api |
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| 135 | */ |
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| 136 | 1 | public function appendTo($element) |
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| 137 | { |
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| 138 | 1 | $e = self::createFragmentCrawler($element); |
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| 139 | 1 | $newnodes = array(); |
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| 140 | 1 | foreach ($e as $i => $node) { |
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| 141 | /** @var \DOMNode $node */ |
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| 142 | 1 | foreach ($this as $newnode) { |
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| 143 | /** @var \DOMNode $newnode */ |
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| 144 | 1 | if ($node !== $newnode) { |
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| 145 | 1 | $newnode = static::importNewnode($newnode, $node, $i); |
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| 146 | 1 | $node->appendChild($newnode); |
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| 147 | } |
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| 148 | 1 | $newnodes[] = $newnode; |
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| 149 | } |
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| 150 | } |
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| 151 | 1 | return self::createFragmentCrawler($newnodes); |
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| 152 | } |
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| 153 | |||
| 154 | /** |
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| 155 | * Returns the attribute value of the first node of the list, or sets an attribute on each element |
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| 156 | * |
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| 157 | * @see HtmlPageCrawler::getAttribute() |
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| 158 | * @see HtmlPageCrawler::setAttribute |
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| 159 | * |
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| 160 | * @param string $name |
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| 161 | * @param null|string $value |
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| 162 | * @return null|string|HtmlPageCrawler |
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| 163 | * @api |
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| 164 | */ |
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| 165 | 1 | public function attr($name, $value = null) |
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| 166 | { |
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| 167 | 1 | if ($value === null) { |
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| 168 | 1 | return $this->getAttribute($name); |
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| 169 | } else { |
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| 170 | return $this->setAttribute($name, $value); |
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| 171 | } |
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| 172 | } |
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| 173 | |||
| 174 | /** |
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| 175 | * Sets an attribute on each element |
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| 176 | * |
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| 177 | * @param string $name |
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| 178 | * @param string $value |
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| 179 | * @return HtmlPageCrawler $this for chaining |
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| 180 | */ |
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| 181 | 2 | public function setAttribute($name, $value) |
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| 191 | |||
| 192 | /** |
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| 193 | * Returns the attribute value of the first node of the list. |
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| 194 | * |
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| 195 | * @param string $name The attribute name |
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| 196 | * @return string|null The attribute value or null if the attribute does not exist |
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| 197 | * @throws \InvalidArgumentException When current node is empty |
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| 198 | * |
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| 199 | */ |
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| 200 | 1 | public function getAttribute($name) |
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| 208 | |||
| 209 | /** |
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| 210 | * Insert content, specified by the parameter, before each element in the set of matched elements. |
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| 211 | * |
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| 212 | * @param string|HtmlPageCrawler|\DOMNode|\DOMNodeList $content |
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| 213 | * @return HtmlPageCrawler $this for chaining |
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| 214 | * @api |
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| 215 | */ |
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| 216 | 1 | public function before($content) |
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| 235 | |||
| 236 | /** |
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| 237 | * Create a deep copy of the set of matched elements. |
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| 238 | * |
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| 239 | * Equivalent to clone() in jQuery (clone is not a valid PHP function name) |
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| 240 | * |
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| 241 | * @return HtmlPageCrawler |
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| 242 | * @api |
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| 243 | */ |
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| 244 | public function makeClone() |
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| 248 | |||
| 249 | public function __clone() |
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| 259 | |||
| 260 | /** |
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| 261 | * Get one CSS style property of the first element or set it for all elements in the list |
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| 262 | * |
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| 263 | * Function is here for compatibility with jQuery; it is the same as getStyle() and setStyle() |
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| 264 | * |
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| 265 | * @see HtmlPageCrawler::getStyle() |
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| 266 | * @see HtmlPageCrawler::setStyle() |
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| 267 | * |
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| 268 | * @param string $key The name of the style property |
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| 269 | * @param null|string $value The CSS value to set, or NULL to get the current value |
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| 270 | * @return HtmlPageCrawler|string If no param is provided, returns the CSS styles of the first element |
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| 271 | * @api |
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| 272 | */ |
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| 273 | 1 | public function css($key, $value = null) |
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| 281 | |||
| 282 | /** |
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| 283 | * get one CSS style property of the first element |
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| 284 | * |
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| 285 | * @param string $key name of the property |
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| 286 | * @return string|null value of the property |
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| 287 | */ |
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| 288 | 1 | public function getStyle($key) |
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| 293 | |||
| 294 | /** |
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| 295 | * set one CSS style property for all elements in the list |
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| 296 | * |
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| 297 | * @param string $key name of the property |
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| 298 | * @param string $value value of the property |
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| 299 | * @return HtmlPageCrawler $this for chaining |
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| 300 | */ |
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| 301 | 1 | public function setStyle($key, $value) |
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| 317 | |||
| 318 | /** |
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| 319 | * Removes all child nodes and text from all nodes in set |
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| 320 | * |
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| 321 | * Equivalent to jQuery's empty() function which is not a valid function name in PHP |
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| 322 | * @return HtmlPageCrawler $this |
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| 323 | * @api |
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| 324 | */ |
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| 325 | 1 | public function makeEmpty() |
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| 332 | |||
| 333 | /** |
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| 334 | * Determine whether any of the matched elements are assigned the given class. |
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| 335 | * |
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| 336 | * @param string $name |
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| 337 | * @return bool |
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| 338 | * @api |
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| 339 | */ |
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| 340 | 1 | public function hasClass($name) |
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| 352 | |||
| 353 | /** |
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| 354 | * Set the HTML contents of each element |
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| 355 | * |
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| 356 | * @param string|HtmlPageCrawler|\DOMNode|\DOMNodeList $content HTML code fragment |
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| 357 | * @return HtmlPageCrawler $this for chaining |
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| 358 | */ |
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| 359 | 2 | public function setInnerHtml($content) |
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| 373 | |||
| 374 | /** |
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| 375 | * Insert every element in the set of matched elements after the target. |
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| 376 | * |
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| 377 | * @param string|HtmlPageCrawler|\DOMNode|\DOMNodeList $element |
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| 378 | * @return \Wa72\HtmlPageDom\HtmlPageCrawler A new Crawler object containing all elements appended to the target elements |
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| 379 | * @api |
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| 380 | */ |
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| 381 | 1 | public function insertAfter($element) |
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| 401 | |||
| 402 | /** |
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| 403 | * Insert every element in the set of matched elements before the target. |
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| 404 | * |
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| 405 | * @param string|HtmlPageCrawler|\DOMNode|\DOMNodeList $element |
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| 406 | * @return \Wa72\HtmlPageDom\HtmlPageCrawler A new Crawler object containing all elements appended to the target elements |
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| 407 | * @api |
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| 408 | */ |
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| 409 | 1 | public function insertBefore($element) |
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| 426 | |||
| 427 | /** |
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| 428 | * Insert content, specified by the parameter, to the beginning of each element in the set of matched elements. |
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| 429 | * |
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| 430 | * @param string|HtmlPageCrawler|\DOMNode|\DOMNodeList $content HTML code fragment |
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| 431 | * @return HtmlPageCrawler $this for chaining |
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| 432 | * @api |
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| 433 | */ |
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| 434 | 2 | public function prepend($content) |
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| 456 | |||
| 457 | /** |
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| 458 | * Insert every element in the set of matched elements to the beginning of the target. |
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| 459 | * |
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| 460 | * @param string|HtmlPageCrawler|\DOMNode|\DOMNodeList $element |
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| 461 | * @return \Wa72\HtmlPageDom\HtmlPageCrawler A new Crawler object containing all elements prepended to the target elements |
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| 462 | * @api |
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| 463 | */ |
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| 464 | 1 | public function prependTo($element) |
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| 486 | |||
| 487 | /** |
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| 488 | * Remove the set of matched elements from the DOM. |
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| 489 | * |
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| 490 | * (as opposed to Crawler::clear() which detaches the nodes only from Crawler |
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| 491 | * but leaves them in the DOM) |
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| 492 | * |
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| 493 | * @api |
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| 494 | */ |
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| 495 | 1 | public function remove() |
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| 507 | |||
| 508 | /** |
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| 509 | * Remove an attribute from each element in the set of matched elements. |
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| 510 | * |
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| 511 | * Alias for removeAttribute for compatibility with jQuery |
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| 512 | * |
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| 513 | * @param string $name |
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| 514 | * @return HtmlPageCrawler |
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| 515 | * @api |
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| 516 | */ |
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| 517 | public function removeAttr($name) |
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| 521 | |||
| 522 | /** |
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| 523 | * Remove an attribute from each element in the set of matched elements. |
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| 524 | * |
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| 525 | * @param string $name |
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| 526 | * @return HtmlPageCrawler |
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| 527 | */ |
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| 528 | public function removeAttribute($name) |
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| 540 | |||
| 541 | /** |
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| 542 | * Remove a class from each element in the list |
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| 543 | * |
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| 544 | * @param string $name |
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| 545 | * @return HtmlPageCrawler $this for chaining |
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| 546 | * @api |
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| 547 | */ |
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| 548 | 1 | public function removeClass($name) |
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| 565 | |||
| 566 | /** |
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| 567 | * Replace each target element with the set of matched elements. |
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| 568 | * |
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| 569 | * @param string|HtmlPageCrawler|\DOMNode|\DOMNodeList $element |
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| 570 | * @return \Wa72\HtmlPageDom\HtmlPageCrawler A new Crawler object containing all elements appended to the target elements |
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| 571 | * @api |
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| 572 | */ |
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| 573 | public function replaceAll($element) |
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| 594 | |||
| 595 | /** |
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| 596 | * Replace each element in the set of matched elements with the provided new content and return the set of elements that was removed. |
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| 597 | * |
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| 598 | * @param string|HtmlPageCrawler|\DOMNode|\DOMNodeList $content |
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| 599 | * @return \Wa72\HtmlPageDom\HtmlPageCrawler $this for chaining |
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| 600 | * @api |
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| 601 | */ |
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| 602 | public function replaceWith($content) |
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| 625 | |||
| 626 | /** |
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| 627 | * Get the combined text contents of each element in the set of matched elements, including their descendants. |
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| 628 | * This is what the jQuery text() function does, contrary to the Crawler::text() method that returns only |
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| 629 | * the text of the first node. |
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| 630 | * |
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| 631 | * @return string |
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| 632 | * @api |
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| 633 | */ |
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| 634 | public function getCombinedText() |
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| 643 | |||
| 644 | /** |
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| 645 | * Set the text contents of the matched elements. |
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| 646 | * |
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| 647 | * @param string $text |
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| 648 | * @return HtmlPageCrawler |
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| 649 | * @api |
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| 650 | */ |
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| 651 | public function setText($text) |
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| 660 | |||
| 661 | /** |
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| 662 | * Add or remove one or more classes from each element in the set of matched elements, depending the class’s presence. |
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| 663 | * |
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| 664 | * @param string $classname One or more classnames separated by spaces |
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| 665 | * @return \Wa72\HtmlPageDom\HtmlPageCrawler $this for chaining |
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| 666 | * @api |
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| 667 | */ |
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| 668 | public function toggleClass($classname) |
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| 684 | |||
| 685 | /** |
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| 686 | * Remove the parents of the set of matched elements from the DOM, leaving the matched elements in their place. |
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| 687 | * |
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| 688 | * @return \Wa72\HtmlPageDom\HtmlPageCrawler $this for chaining |
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| 689 | * @api |
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| 690 | */ |
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| 691 | public function unwrap() |
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| 701 | |||
| 702 | /** |
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| 703 | * Remove the matched elements, but promote the children to take their place. |
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| 704 | * |
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| 705 | * @return \Wa72\HtmlPageDom\HtmlPageCrawler $this for chaining |
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| 706 | * @api |
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| 707 | */ |
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| 708 | public function unwrapInner() |
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| 724 | |||
| 725 | |||
| 726 | /** |
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| 727 | * Wrap an HTML structure around each element in the set of matched elements |
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| 728 | * |
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| 729 | * The HTML structure must contain only one root node, e.g.: |
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| 730 | * Works: <div><div></div></div> |
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| 731 | * Does not work: <div></div><div></div> |
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| 732 | * |
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| 733 | * @param string|HtmlPageCrawler|\DOMNode $wrappingElement |
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| 734 | * @return HtmlPageCrawler $this for chaining |
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| 735 | * @api |
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| 736 | */ |
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| 737 | 1 | public function wrap($wrappingElement) |
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| 774 | |||
| 775 | /** |
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| 776 | * Wrap an HTML structure around all elements in the set of matched elements. |
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| 777 | * |
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| 778 | * @param string|HtmlPageCrawler|\DOMNode|\DOMNodeList $content |
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| 779 | * @throws \LogicException |
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| 780 | * @return \Wa72\HtmlPageDom\HtmlPageCrawler $this for chaining |
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| 781 | * @api |
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| 782 | */ |
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| 783 | public function wrapAll($content) |
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| 821 | |||
| 822 | /** |
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| 823 | * Wrap an HTML structure around the content of each element in the set of matched elements. |
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| 824 | * |
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| 825 | * @param string|HtmlPageCrawler|\DOMNode|\DOMNodeList $content |
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| 826 | * @return \Wa72\HtmlPageDom\HtmlPageCrawler $this for chaining |
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| 827 | * @api |
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| 828 | */ |
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| 829 | public function wrapInner($content) |
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| 837 | |||
| 838 | /** |
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| 839 | * Get the HTML code fragment of all elements and their contents. |
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| 840 | * |
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| 841 | * If the first node contains a complete HTML document return only |
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| 842 | * the full code of this document. |
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| 843 | * |
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| 844 | * @return string HTML code (fragment) |
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| 845 | * @api |
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| 846 | */ |
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| 847 | 5 | public function saveHTML() |
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| 861 | |||
| 862 | 2 | public function __toString() |
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| 866 | |||
| 867 | /** |
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| 868 | * checks whether the first node contains a complete html document |
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| 869 | * (as opposed to a document fragment) |
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| 870 | * |
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| 871 | * @return boolean |
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| 872 | */ |
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| 873 | 5 | public function isHtmlDocument() |
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| 886 | |||
| 887 | /** |
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| 888 | * get ownerDocument of the first element |
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| 889 | * |
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| 890 | * @return \DOMDocument|null |
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| 891 | */ |
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| 892 | 2 | public function getDOMDocument() |
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| 903 | |||
| 904 | /** |
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| 905 | * Filters the list of nodes with a CSS selector. |
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| 906 | * |
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| 907 | * @param string $selector |
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| 908 | * @return HtmlPageCrawler |
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| 909 | */ |
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| 910 | 4 | public function filter($selector) |
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| 914 | |||
| 915 | /** |
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| 916 | * Filters the list of nodes with an XPath expression. |
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| 917 | * |
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| 918 | * @param string $xpath An XPath expression |
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| 919 | * |
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| 920 | * @return HtmlPageCrawler A new instance of Crawler with the filtered list of nodes |
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| 921 | * |
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| 922 | * @api |
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| 923 | */ |
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| 924 | 2 | public function filterXPath($xpath) |
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| 928 | |||
| 929 | /** |
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| 930 | * Adds HTML/XML content to the HtmlPageCrawler object (but not to the DOM of an already attached node). |
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| 931 | * |
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| 932 | * Function overriden from Crawler because HTML fragments are always added as complete documents there |
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| 933 | * |
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| 934 | * |
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| 935 | * @param string $content A string to parse as HTML/XML |
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| 936 | * @param null|string $type The content type of the string |
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| 937 | * |
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| 938 | * @return null|void |
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| 939 | */ |
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| 940 | 4 | public function addContent($content, $type = null) |
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| 957 | |||
| 958 | // public function addHtmlFragment($content, $charset = 'UTF-8') |
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| 959 | // { |
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| 960 | // $d = new \DOMDocument('1.0', $charset); |
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| 961 | // $d->preserveWhiteSpace = false; |
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| 962 | // $root = $d->appendChild($d->createElement(self::FRAGMENT_ROOT_TAGNAME)); |
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| 963 | // $bodynode = Helpers::getBodyNodeFromHtmlFragment($content, $charset); |
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| 964 | // foreach ($bodynode->childNodes as $child) { |
||
| 965 | // $inode = $root->appendChild($d->importNode($child, true)); |
||
| 966 | // if ($inode) { |
||
| 967 | // $this->addNode($inode); |
||
| 968 | // } |
||
| 969 | // } |
||
| 970 | // } |
||
| 971 | |||
| 972 | /** |
||
| 973 | * @param string $content |
||
| 974 | * @param string $charset |
||
| 975 | * @return HtmlPageCrawler |
||
| 976 | * @throws \Exception |
||
| 977 | */ |
||
| 978 | 2 | public function createFragment($content, $charset = 'UTF-8') |
|
| 994 | |||
| 995 | 2 | protected function createFragmentCrawler($content) |
|
| 1019 | |||
| 1020 | /** |
||
| 1021 | * Adds a node to the current list of nodes. |
||
| 1022 | * |
||
| 1023 | * This method uses the appropriate specialized add*() method based |
||
| 1024 | * on the type of the argument. |
||
| 1025 | * |
||
| 1026 | * Overwritten from parent to allow Crawler to be added |
||
| 1027 | * |
||
| 1028 | * @param null|\DOMNodeList|array|\DOMNode|Crawler $node A node |
||
| 1029 | * |
||
| 1030 | * @api |
||
| 1031 | */ |
||
| 1032 | 17 | public function add($node) |
|
| 1042 | |||
| 1043 | /** |
||
| 1044 | * @param \DOMNode $newnode |
||
| 1045 | * @param \DOMNode $referencenode |
||
| 1046 | * @param int $clone |
||
| 1047 | * @return \DOMNode |
||
| 1048 | */ |
||
| 1049 | 2 | protected static function importNewnode(\DOMNode $newnode, \DOMNode $referencenode, $clone = 0) { |
|
| 1060 | |||
| 1061 | /** |
||
| 1062 | * Checks whether the first node in the set is disconnected (has no parent node) |
||
| 1063 | * |
||
| 1064 | * @return bool |
||
| 1065 | */ |
||
| 1066 | public function isDisconnected() |
||
| 1071 | |||
| 1072 | public function __get($name) |
||
| 1081 | } |
||
| 1082 |
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The number of this metric differs depending on the chosen design (inheritance vs. composition). For inheritance, the number should generally be a bit lower.
A high number indicates a reusable class. It might also make the class harder to change without breaking other classes though.