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3.02 |
1 | <?php |
2 | /** |
3 | * CSS `@import` node |
4 | * |
5 | * The general strategy here is that we don't want to wait |
6 | * for the parsing to be completed, before we start importing |
7 | * the file. That's because in the context of a browser, |
8 | * most of the time will be spent waiting for the server to respond. |
9 | * |
10 | * On creation, we push the import path to our import queue, though |
11 | * `import,push`, we also pass it a callback, which it'll call once |
12 | * the file has been fetched, and parsed. |
13 | * |
14 | * @private |
15 | * @see less-2.5.3.js#Import.prototype |
16 | */ |
17 | class Less_Tree_Import extends Less_Tree { |
18 | |
19 | public $options; |
20 | public $index; |
21 | public $path; |
22 | public $features; |
23 | public $currentFileInfo; |
24 | public $css; |
25 | /** @var bool|null This is populated by Less_ImportVisitor */ |
26 | public $doSkip = false; |
27 | /** @var string|null This is populated by Less_ImportVisitor */ |
28 | public $importedFilename; |
29 | /** |
30 | * This is populated by Less_ImportVisitor. |
31 | * |
32 | * For imports that use "inline", this holds a raw string. |
33 | * |
34 | * @var string|Less_Tree_Ruleset|null |
35 | */ |
36 | public $root; |
37 | |
38 | public function __construct( $path, $features, array $options, $index, $currentFileInfo = null ) { |
39 | $this->options = $options + [ 'inline' => false, 'optional' => false, 'multiple' => false ]; |
40 | $this->index = $index; |
41 | $this->path = $path; |
42 | $this->features = $features; |
43 | $this->currentFileInfo = $currentFileInfo; |
44 | |
45 | if ( isset( $this->options['less'] ) || $this->options['inline'] ) { |
46 | $this->css = !isset( $this->options['less'] ) || !$this->options['less'] || $this->options['inline']; |
47 | } else { |
48 | $pathValue = $this->getPath(); |
49 | // Leave any ".css" file imports as literals for the browser. |
50 | // Also leave any remote HTTP resources as literals regardless of whether |
51 | // they contain ".css" in their filename. |
52 | if ( $pathValue && ( |
53 | preg_match( '/[#\.\&\?\/]css([\?;].*)?$/', $pathValue ) |
54 | || preg_match( '/^(https?:)?\/\//i', $pathValue ) |
55 | ) ) { |
56 | $this->css = true; |
57 | } |
58 | } |
59 | } |
60 | |
61 | // |
62 | // The actual import node doesn't return anything, when converted to CSS. |
63 | // The reason is that it's used at the evaluation stage, so that the rules |
64 | // it imports can be treated like any other rules. |
65 | // |
66 | // In `eval`, we make sure all Import nodes get evaluated, recursively, so |
67 | // we end up with a flat structure, which can easily be imported in the parent |
68 | // ruleset. |
69 | // |
70 | |
71 | public function accept( $visitor ) { |
72 | if ( $this->features ) { |
73 | $this->features = $visitor->visitObj( $this->features ); |
74 | } |
75 | $this->path = $visitor->visitObj( $this->path ); |
76 | |
77 | if ( !$this->options['inline'] && $this->root ) { |
78 | $this->root = $visitor->visit( $this->root ); |
79 | } |
80 | } |
81 | |
82 | public function genCSS( $output ) { |
83 | if ( $this->css && !isset( $this->path->currentFileInfo["reference"] ) ) { |
84 | $output->add( '@import ', $this->currentFileInfo, $this->index ); |
85 | $this->path->genCSS( $output ); |
86 | if ( $this->features ) { |
87 | $output->add( ' ' ); |
88 | $this->features->genCSS( $output ); |
89 | } |
90 | $output->add( ';' ); |
91 | } |
92 | } |
93 | |
94 | /** |
95 | * @return string|null |
96 | */ |
97 | public function getPath() { |
98 | // During the first pass, Less_Tree_Url may contain a Less_Tree_Variable (not yet expanded), |
99 | // and thus has no value property defined yet. Return null until we reach the next phase. |
100 | // https://github.com/wikimedia/less.php/issues/29 |
101 | // TODO: Upstream doesn't need a check against Less_Tree_Variable. Why do we? |
102 | $path = ( $this->path instanceof Less_Tree_Url && !( $this->path->value instanceof Less_Tree_Variable ) ) |
103 | ? $this->path->value->value |
104 | // e.g. Less_Tree_Quoted |
105 | : $this->path->value; |
106 | |
107 | if ( is_string( $path ) ) { |
108 | // remove query string and fragment |
109 | return preg_replace( '/[\?#][^\?]*$/', '', $path ); |
110 | } |
111 | } |
112 | |
113 | public function isVariableImport() { |
114 | $path = $this->path; |
115 | if ( $path instanceof Less_Tree_Url ) { |
116 | $path = $path->value; |
117 | } |
118 | if ( $path instanceof Less_Tree_Quoted ) { |
119 | return $path->containsVariables(); |
120 | } |
121 | return true; |
122 | } |
123 | |
124 | public function compileForImport( $env ) { |
125 | $path = $this->path; |
126 | if ( $path instanceof Less_Tree_Url ) { |
127 | $path = $path->value; |
128 | } |
129 | return new self( $path->compile( $env ), $this->features, $this->options, $this->index, $this->currentFileInfo ); |
130 | } |
131 | |
132 | public function compilePath( $env ) { |
133 | $path = $this->path->compile( $env ); |
134 | $rootpath = $this->currentFileInfo['rootpath'] ?? null; |
135 | |
136 | if ( !( $path instanceof Less_Tree_Url ) ) { |
137 | if ( $rootpath ) { |
138 | $pathValue = $path->value; |
139 | // Add the base path if the import is relative |
140 | if ( $pathValue && Less_Environment::isPathRelative( $pathValue ) ) { |
141 | $path->value = $this->currentFileInfo['uri_root'] . $pathValue; |
142 | } |
143 | } |
144 | $path->value = Less_Environment::normalizePath( $path->value ); |
145 | } |
146 | |
147 | return $path; |
148 | } |
149 | |
150 | /** |
151 | * @param Less_Environment $env |
152 | * @see less-2.5.3.js#Import.prototype.eval |
153 | */ |
154 | public function compile( $env ) { |
155 | $features = ( $this->features ? $this->features->compile( $env ) : null ); |
156 | |
157 | // import once |
158 | if ( $this->skip( $env ) ) { |
159 | return []; |
160 | } |
161 | |
162 | if ( $this->options['inline'] ) { |
163 | $contents = new Less_Tree_Anonymous( $this->root, 0, |
164 | [ |
165 | 'filename' => $this->importedFilename, |
166 | 'reference' => $this->currentFileInfo['reference'] ?? null, |
167 | ], |
168 | true, |
169 | true, |
170 | false |
171 | ); |
172 | return $this->features |
173 | ? new Less_Tree_Media( [ $contents ], $this->features->value ) |
174 | : [ $contents ]; |
175 | } elseif ( $this->css ) { |
176 | $newImport = new self( $this->compilePath( $env ), $features, $this->options, $this->index ); |
177 | // TODO: We might need upstream's `if (!newImport.css && this.error) { throw this.error;` |
178 | return $newImport; |
179 | } else { |
180 | $ruleset = new Less_Tree_Ruleset( null, $this->root->rules ); |
181 | |
182 | $ruleset->evalImports( $env ); |
183 | |
184 | return $this->features |
185 | ? new Less_Tree_Media( $ruleset->rules, $this->features->value ) |
186 | : $ruleset->rules; |
187 | |
188 | } |
189 | } |
190 | |
191 | /** |
192 | * Should the import be skipped? |
193 | * |
194 | * @param Less_Environment $env |
195 | * @return bool|null |
196 | */ |
197 | public function skip( $env ) { |
198 | $path = $this->getPath(); |
199 | // TODO: Since our Import->getPath() varies from upstream Less.js (ours can return null). |
200 | // we therefore need an empty string fallback here. Remove this fallback once getPath() |
201 | // is in sync with upstream. |
202 | $fullPath = Less_FileManager::getFilePath( $path, $this->currentFileInfo )[0] ?? $path ?? ''; |
203 | |
204 | if ( $this->doSkip !== null ) { |
205 | return $this->doSkip; |
206 | } |
207 | |
208 | // @see less-2.5.3.js#ImportVisitor.prototype.onImported |
209 | if ( isset( $env->importVisitorOnceMap[$fullPath] ) ) { |
210 | return true; |
211 | } |
212 | |
213 | $env->importVisitorOnceMap[$fullPath] = true; |
214 | return false; |
215 | } |
216 | } |