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| 1 | <?php |
| 2 | /** |
| 3 | * This program is free software; you can redistribute it and/or modify |
| 4 | * it under the terms of the GNU General Public License as published by |
| 5 | * the Free Software Foundation; either version 2 of the License, or |
| 6 | * (at your option) any later version. |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 11 | * GNU General Public License for more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU General Public License along |
| 14 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 15 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
| 16 | * http://www.gnu.org/copyleft/gpl.html |
| 17 | */ |
| 18 | |
| 19 | namespace MediaWiki\Skin; |
| 20 | |
| 21 | use MediaWiki\Output\OutputPage; |
| 22 | use MediaWiki\Parser\ParserOutputFlags; |
| 23 | |
| 24 | /** |
| 25 | * @internal for use inside Skin and SkinTemplate classes only |
| 26 | * @unstable |
| 27 | */ |
| 28 | class SkinComponentTableOfContents implements SkinComponent { |
| 29 | /** @var OutputPage */ |
| 30 | private $output; |
| 31 | |
| 32 | /** |
| 33 | * @param OutputPage $output |
| 34 | */ |
| 35 | public function __construct( OutputPage $output ) { |
| 36 | $this->output = $output; |
| 37 | } |
| 38 | |
| 39 | /** |
| 40 | * Nests child sections within their parent sections. |
| 41 | * |
| 42 | * @param array $sections |
| 43 | * @param int $toclevel |
| 44 | * @return array |
| 45 | */ |
| 46 | private function getSectionsDataInternal( array $sections, int $toclevel = 1 ): array { |
| 47 | $data = []; |
| 48 | foreach ( $sections as $i => $section ) { |
| 49 | // Child section belongs to a higher parent. |
| 50 | if ( $section->tocLevel < $toclevel ) { |
| 51 | return $data; |
| 52 | } |
| 53 | |
| 54 | // Set all the parent sections at the current top level. |
| 55 | if ( $section->tocLevel === $toclevel ) { |
| 56 | $childSections = $this->getSectionsDataInternal( |
| 57 | array_slice( $sections, $i + 1 ), |
| 58 | $toclevel + 1 |
| 59 | ); |
| 60 | $data[] = $section->toLegacy() + [ |
| 61 | 'array-sections' => $childSections, |
| 62 | 'is-top-level-section' => $toclevel === 1, |
| 63 | 'is-parent-section' => $childSections !== [] |
| 64 | ]; |
| 65 | } |
| 66 | } |
| 67 | return $data; |
| 68 | } |
| 69 | |
| 70 | /** |
| 71 | * Get table of contents template data |
| 72 | * |
| 73 | * Enriches section data by nesting child elements within parent elements |
| 74 | * such that the table of contents can be rendered in Mustache. |
| 75 | * |
| 76 | * For an example of how to render the data, see TableOfContents.mustache in |
| 77 | * the Vector skin. |
| 78 | * |
| 79 | * @return array |
| 80 | */ |
| 81 | private function getTOCDataInternal(): array { |
| 82 | $tocData = $this->output->getTOCData(); |
| 83 | // Return data only if TOC present T298796. |
| 84 | if ( $tocData === null ) { |
| 85 | return []; |
| 86 | } |
| 87 | // Respect __NOTOC__ |
| 88 | if ( $this->output->getOutputFlag( ParserOutputFlags::NO_TOC ) ) { |
| 89 | return []; |
| 90 | } |
| 91 | |
| 92 | $outputSections = $tocData->getSections(); |
| 93 | |
| 94 | return count( $outputSections ) > 0 ? [ |
| 95 | 'number-section-count' => count( $outputSections ), |
| 96 | 'array-sections' => $this->getSectionsDataInternal( $outputSections, 1 ), |
| 97 | ] : []; |
| 98 | } |
| 99 | |
| 100 | /** |
| 101 | * @inheritDoc |
| 102 | */ |
| 103 | public function getTemplateData(): array { |
| 104 | return $this->getTOCDataInternal(); |
| 105 | } |
| 106 | } |