Current File : //www/varak.net/wiki.varak.net/extensions/MobileFrontend/includes/diff/InlineDiffFormatter.php
<?php
use MediaWiki\Diff\WordAccumulator;
/**
* Extends standard Table-formatted DiffFormatter of core to enable Inline-Diff
* format of MF with only one column.
*/
class InlineDiffFormatter extends TableDiffFormatter {
/**
* Get the header of diff block. Remember: Given line numbers will not be visible,
* it's a one column diff style.
* @inheritDoc
* @param int $xbeg line number of left side to compare with
* @param int $xlen Number of trailing lines after the changed line on left side
* @param int $ybeg right side line number to compare with
* @param int $ylen Number of trailing lines after the changed line on right side
* @return string
*/
protected function blockHeader( $xbeg, $xlen, $ybeg, $ylen ) {
return "<div class=\"mw-diff-inline-header\"><!-- LINES $xbeg,$ybeg --></div>\n";
}
/**
* Get a div element with a complete new added line as content.
* Complete line will be appear with green background.
* @inheritDoc
* @param array $lines With changed lines
*/
protected function added( $lines ) {
foreach ( $lines as $line ) {
$this->writeOutput( '<div class="mw-diff-inline-added"><ins>'
. $this->lineOrNbsp( htmlspecialchars( $line ) )
. "</ins></div>\n" );
}
}
/**
* Get a div with a line which is deleted completly.
* This line will be appear with complete red background.
* @inheritDoc
* @param array $lines With deleted lines
*/
protected function deleted( $lines ) {
foreach ( $lines as $line ) {
$this->writeOutput( '<div class="mw-diff-inline-deleted"><del>'
. $this->lineOrNbsp( htmlspecialchars( $line ) )
. "</del></div>\n" );
}
}
/**
* Get a div with some changed content.
* Line will appear with white and the changed context in
* red (for deleted chars) and green (for added chars) background.
* @inheritDoc
* @param array $lines With edited lines
*/
protected function context( $lines ) {
foreach ( $lines as $line ) {
$this->writeOutput( "<div class=\"mw-diff-inline-context\">" .
"{$this->contextLine( htmlspecialchars( $line ) )}</div>\n" );
}
}
/**
* Convert all spaces to a forced blank. If line is empty creates at least one
* forced space.
* @param string $marker Unused
* @param string $class Unused
* @param string $line Content of the line
* @return string
*/
protected function wrapLine( $marker, $class, $line ) {
// The <div> wrapper is needed for 'overflow: auto' style to scroll properly
$this->escapeWhiteSpace( $this->lineOrNbsp( $line ) );
return $line;
}
/**
* Adds a forced blank to line, if the line is empty.
* @param string $line Line to edit
*
* @return string
*/
protected function lineOrNbsp( $line ) {
if ( $line === '' ) {
$line = ' ';
}
return $line;
}
/**
* Get a div with changed content (not complete added or deleted line)
* @inheritDoc
* @param string[] $orig Old content to compare with
* @param string[] $closing New content to compare with
*/
protected function changed( $orig, $closing ) {
$this->writeOutput( '<div class="mw-diff-inline-changed">' );
$diff = new WordLevelDiff( $orig, $closing );
$edits = $this->inlineWordDiff( $diff );
// WordLevelDiff returns already HTML-escaped output.
$this->writeOutput( implode( '', $edits ) );
$this->writeOutput( "</div>\n" );
}
/**
* Builds the string of deleted and added words from the given diff.
* @param WordLevelDiff $diff
* @return array Array of changed lines
*/
private function inlineWordDiff( $diff ) {
$inline = new WordAccumulator;
$inline->insClass = $inline->delClass = '';
foreach ( $diff->edits as $edit ) {
if ( $edit->type == 'copy' ) {
$inline->addWords( $edit->orig );
} elseif ( $edit->type == 'delete' ) {
$inline->addWords( $edit->orig, 'del' );
} elseif ( $edit->type == 'add' ) {
$inline->addWords( $edit->closing, 'ins' );
} else {
$inline->addWords( $edit->orig, 'del' );
$inline->addWords( $edit->closing, 'ins' );
}
}
$lines = $inline->getLines();
return $lines;
}
}
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