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IndexMapOffset.php
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IndexMapOffset.php
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<?php
/**
* Copyright 2023 Wikimedia Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* @file
* @license Apache-2.0
* @license MIT
* @license GPL-2.0-or-later
* @license LGPL-2.1-or-later
*/
namespace Wikimedia\Minify;
/**
* A class representing a line/column offset into a combined generated file,
* for index map generation.
*
* Or it can represent the past-the-end offset of a single specified file,
* that is, the number of lines in the file and the number of columns in
* the last line of the file.
*/
class IndexMapOffset {
/** @var int */
public $line;
/** @var int */
public $column;
/**
* @param int $line The zero-based line number
* @param int $column The zero-based column number
*/
public function __construct( int $line, int $column ) {
$this->line = $line;
$this->column = $column;
}
/**
* Count the number of lines and columns in the specified string, and
* create an IndexMapOffset representing the corresponding size.
*
* @param string $text
* @return self
*/
public static function newFromText( string $text ) {
$lines = substr_count( $text, "\n" );
$lastBreakPos = strrpos( $text, "\n" );
if ( $lastBreakPos === false ) {
$columns = Utils::getJsLength( $text );
} else {
$columns = Utils::getJsLength( substr( $text, $lastBreakPos + 1 ) );
}
return new self( $lines, $columns );
}
/**
* Restore an IndexMapOffset which was serialized with toArray().
*
* @param array $data
* @return self
*/
public static function newFromArray( array $data ) {
return new self( $data[0], $data[1] );
}
/**
* Convert the object to plain data.
*
* @return array
*/
public function toArray(): array {
return [ $this->line, $this->column ];
}
/**
* Advance the offset, assuming a file of the specified size was added
* to the combined file.
*
* @param IndexMapOffset $nextSize
* @return void
*/
public function add( self $nextSize ) {
if ( $nextSize->line > 0 ) {
$this->line += $nextSize->line;
$this->column = $nextSize->column;
} else {
$this->column += $nextSize->column;
}
}
}

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Oct 4 2026, 07:46 (5 w, 2 d ago)
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IndexMapOffset.php (2 KB)

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