* @private
* @ingroup DifferenceEngine
*/
-class _DiffOp {
- var $type;
- var $orig;
- var $closing;
+abstract class DiffOp {
+ public $type;
+ public $orig;
+ public $closing;
- function reverse() {
- trigger_error( 'pure virtual', E_USER_ERROR );
- }
+ public abstract function reverse();
/**
* @return int
* @private
* @ingroup DifferenceEngine
*/
-class _DiffOp_Copy extends _DiffOp {
- var $type = 'copy';
+class DiffOp_Copy extends DiffOp {
+ public $type = 'copy';
function __construct( $orig, $closing = false ) {
if ( !is_array( $closing ) ) {
}
/**
- * @return _DiffOp_Copy
+ * @return DiffOp_Copy
*/
function reverse() {
- return new _DiffOp_Copy( $this->closing, $this->orig );
+ return new DiffOp_Copy( $this->closing, $this->orig );
}
}
* @private
* @ingroup DifferenceEngine
*/
-class _DiffOp_Delete extends _DiffOp {
- var $type = 'delete';
+class DiffOp_Delete extends DiffOp {
+ public $type = 'delete';
function __construct( $lines ) {
$this->orig = $lines;
}
/**
- * @return _DiffOp_Add
+ * @return DiffOp_Add
*/
function reverse() {
- return new _DiffOp_Add( $this->orig );
+ return new DiffOp_Add( $this->orig );
}
}
* @private
* @ingroup DifferenceEngine
*/
-class _DiffOp_Add extends _DiffOp {
- var $type = 'add';
+class DiffOp_Add extends DiffOp {
+ public $type = 'add';
function __construct( $lines ) {
$this->closing = $lines;
}
/**
- * @return _DiffOp_Delete
+ * @return DiffOp_Delete
*/
function reverse() {
- return new _DiffOp_Delete( $this->closing );
+ return new DiffOp_Delete( $this->closing );
}
}
* @private
* @ingroup DifferenceEngine
*/
-class _DiffOp_Change extends _DiffOp {
- var $type = 'change';
+class DiffOp_Change extends DiffOp {
+ public $type = 'change';
function __construct( $orig, $closing ) {
$this->orig = $orig;
}
/**
- * @return _DiffOp_Change
+ * @return DiffOp_Change
*/
function reverse() {
- return new _DiffOp_Change( $this->closing, $this->orig );
+ return new DiffOp_Change( $this->closing, $this->orig );
}
}
* @private
* @ingroup DifferenceEngine
*/
-class _DiffEngine {
+class DiffEngine {
const MAX_XREF_LENGTH = 10000;
wfProfileIn( __METHOD__ );
// Diff and store locally
- $this->diff_local( $from_lines, $to_lines );
+ $this->diffLocal( $from_lines, $to_lines );
// Merge edits when possible
- $this->_shift_boundaries( $from_lines, $this->xchanged, $this->ychanged );
- $this->_shift_boundaries( $to_lines, $this->ychanged, $this->xchanged );
+ $this->shiftBoundaries( $from_lines, $this->xchanged, $this->ychanged );
+ $this->shiftBoundaries( $to_lines, $this->ychanged, $this->xchanged );
// Compute the edit operations.
$n_from = count( $from_lines );
++$yi;
}
if ( $copy ) {
- $edits[] = new _DiffOp_Copy( $copy );
+ $edits[] = new DiffOp_Copy( $copy );
}
// Find deletes & adds.
}
if ( $delete && $add ) {
- $edits[] = new _DiffOp_Change( $delete, $add );
+ $edits[] = new DiffOp_Change( $delete, $add );
} elseif ( $delete ) {
- $edits[] = new _DiffOp_Delete( $delete );
+ $edits[] = new DiffOp_Delete( $delete );
} elseif ( $add ) {
- $edits[] = new _DiffOp_Add( $add );
+ $edits[] = new DiffOp_Add( $add );
}
}
wfProfileOut( __METHOD__ );
* @param $from_lines
* @param $to_lines
*/
- function diff_local( $from_lines, $to_lines ) {
+ private function diffLocal( $from_lines, $to_lines ) {
global $wgExternalDiffEngine;
wfProfileIn( __METHOD__ );
// Ignore lines which do not exist in both files.
for ( $xi = $skip; $xi < $n_from - $endskip; $xi++ ) {
- $xhash[$this->_line_hash( $from_lines[$xi] )] = 1;
+ $xhash[$this->lineHash( $from_lines[$xi] )] = 1;
}
for ( $yi = $skip; $yi < $n_to - $endskip; $yi++ ) {
$line = $to_lines[$yi];
- if ( ( $this->ychanged[$yi] = empty( $xhash[$this->_line_hash( $line )] ) ) ) {
+ if ( ( $this->ychanged[$yi] = empty( $xhash[$this->lineHash( $line )] ) ) ) {
continue;
}
- $yhash[$this->_line_hash( $line )] = 1;
+ $yhash[$this->lineHash( $line )] = 1;
$this->yv[] = $line;
$this->yind[] = $yi;
}
for ( $xi = $skip; $xi < $n_from - $endskip; $xi++ ) {
$line = $from_lines[$xi];
- if ( ( $this->xchanged[$xi] = empty( $yhash[$this->_line_hash( $line )] ) ) ) {
+ if ( ( $this->xchanged[$xi] = empty( $yhash[$this->lineHash( $line )] ) ) ) {
continue;
}
$this->xv[] = $line;
}
// Find the LCS.
- $this->_compareseq( 0, count( $this->xv ), 0, count( $this->yv ) );
+ $this->compareSeq( 0, count( $this->xv ), 0, count( $this->yv ) );
}
wfProfileOut( __METHOD__ );
}
* @param $line string
* @return string
*/
- function _line_hash( $line ) {
+ private function lineHash( $line ) {
if ( strlen( $line ) > self::MAX_XREF_LENGTH ) {
return md5( $line );
} else {
* @param $nchunks
* @return array
*/
- function _diag( $xoff, $xlim, $yoff, $ylim, $nchunks ) {
+ private function diag( $xoff, $xlim, $yoff, $ylim, $nchunks ) {
$flip = false;
if ( $xlim - $xoff > $ylim - $yoff ) {
reset( $matches );
while ( list( , $y ) = each( $matches ) ) {
if ( empty( $this->in_seq[$y] ) ) {
- $k = $this->_lcs_pos( $y );
+ $k = $this->lcsPos( $y );
assert( '$k > 0' );
$ymids[$k] = $ymids[$k -1];
break;
$this->seq[$k] = $y;
$this->in_seq[$y] = 1;
} elseif ( empty( $this->in_seq[$y] ) ) {
- $k = $this->_lcs_pos( $y );
+ $k = $this->lcsPos( $y );
assert( '$k > 0' );
$ymids[$k] = $ymids[$k -1];
}
* @param $ypos
* @return int
*/
- function _lcs_pos( $ypos ) {
+ private function lcsPos( $ypos ) {
$end = $this->lcs;
if ( $end == 0 || $ypos > $this->seq[$end] ) {
$this->seq[++$this->lcs] = $ypos;
* @param $yoff
* @param $ylim
*/
- function _compareseq( $xoff, $xlim, $yoff, $ylim ) {
+ private function compareSeq( $xoff, $xlim, $yoff, $ylim ) {
// Slide down the bottom initial diagonal.
while ( $xoff < $xlim && $yoff < $ylim && $this->xv[$xoff] == $this->yv[$yoff] ) {
++$xoff;
// $nchunks = sqrt(min($xlim - $xoff, $ylim - $yoff) / 2.5);
// $nchunks = max(2,min(8,(int)$nchunks));
$nchunks = min( 7, $xlim - $xoff, $ylim - $yoff ) + 1;
- list( $lcs, $seps ) = $this->_diag( $xoff, $xlim, $yoff, $ylim, $nchunks );
+ list( $lcs, $seps ) = $this->diag( $xoff, $xlim, $yoff, $ylim, $nchunks );
}
if ( $lcs == 0 ) {
reset( $seps );
$pt1 = $seps[0];
while ( $pt2 = next( $seps ) ) {
- $this->_compareseq( $pt1[0], $pt2[0], $pt1[1], $pt2[1] );
+ $this->compareSeq( $pt1[0], $pt2[0], $pt1[1], $pt2[1] );
$pt1 = $pt2;
}
}
*
* This is extracted verbatim from analyze.c (GNU diffutils-2.7).
*/
- function _shift_boundaries( $lines, &$changed, $other_changed ) {
+ private function shiftBoundaries( $lines, &$changed, $other_changed ) {
wfProfileIn( __METHOD__ );
$i = 0;
$j = 0;
* @ingroup DifferenceEngine
*/
class Diff {
- var $edits;
+ public $edits;
/**
* Constructor.
* @param $to_lines array An array of strings.
*/
function __construct( $from_lines, $to_lines ) {
- $eng = new _DiffEngine;
+ $eng = new DiffEngine;
$this->edits = $eng->diff( $from_lines, $to_lines );
- // $this->_check($from_lines, $to_lines);
+ // $this->check($from_lines, $to_lines);
}
/**
function reverse() {
$rev = $this;
$rev->edits = array();
+ /** @var DiffOp $edit */
foreach ( $this->edits as $edit ) {
$rev->edits[] = $edit->reverse();
}
* @param $from_lines
* @param $to_lines
*/
- function _check( $from_lines, $to_lines ) {
+ private function check( $from_lines, $to_lines ) {
wfProfileIn( __METHOD__ );
if ( serialize( $from_lines ) != serialize( $this->orig() ) ) {
trigger_error( "Reconstructed original doesn't match", E_USER_ERROR );
}
}
-/**
- * A class to format Diffs
- *
- * This class formats the diff in classic diff format.
- * It is intended that this class be customized via inheritance,
- * to obtain fancier outputs.
- * @todo document
- * @private
- * @ingroup DifferenceEngine
- */
-class DiffFormatter {
- /**
- * Number of leading context "lines" to preserve.
- *
- * This should be left at zero for this class, but subclasses
- * may want to set this to other values.
- */
- var $leading_context_lines = 0;
-
- /**
- * Number of trailing context "lines" to preserve.
- *
- * This should be left at zero for this class, but subclasses
- * may want to set this to other values.
- */
- var $trailing_context_lines = 0;
-
- /**
- * Format a diff.
- *
- * @param $diff Diff A Diff object.
- * @return string The formatted output.
- */
- function format( $diff ) {
- wfProfileIn( __METHOD__ );
-
- $xi = $yi = 1;
- $block = false;
- $context = array();
-
- $nlead = $this->leading_context_lines;
- $ntrail = $this->trailing_context_lines;
-
- $this->_start_diff();
-
- foreach ( $diff->edits as $edit ) {
- if ( $edit->type == 'copy' ) {
- if ( is_array( $block ) ) {
- if ( count( $edit->orig ) <= $nlead + $ntrail ) {
- $block[] = $edit;
- } else {
- if ( $ntrail ) {
- $context = array_slice( $edit->orig, 0, $ntrail );
- $block[] = new _DiffOp_Copy( $context );
- }
- $this->_block( $x0, $ntrail + $xi - $x0,
- $y0, $ntrail + $yi - $y0,
- $block );
- $block = false;
- }
- }
- $context = $edit->orig;
- } else {
- if ( !is_array( $block ) ) {
- $context = array_slice( $context, count( $context ) - $nlead );
- $x0 = $xi - count( $context );
- $y0 = $yi - count( $context );
- $block = array();
- if ( $context ) {
- $block[] = new _DiffOp_Copy( $context );
- }
- }
- $block[] = $edit;
- }
-
- if ( $edit->orig ) {
- $xi += count( $edit->orig );
- }
- if ( $edit->closing ) {
- $yi += count( $edit->closing );
- }
- }
-
- if ( is_array( $block ) ) {
- $this->_block( $x0, $xi - $x0,
- $y0, $yi - $y0,
- $block );
- }
-
- $end = $this->_end_diff();
- wfProfileOut( __METHOD__ );
- return $end;
- }
-
- /**
- * @param $xbeg
- * @param $xlen
- * @param $ybeg
- * @param $ylen
- * @param $edits
- */
- function _block( $xbeg, $xlen, $ybeg, $ylen, &$edits ) {
- wfProfileIn( __METHOD__ );
- $this->_start_block( $this->_block_header( $xbeg, $xlen, $ybeg, $ylen ) );
- foreach ( $edits as $edit ) {
- if ( $edit->type == 'copy' ) {
- $this->_context( $edit->orig );
- } elseif ( $edit->type == 'add' ) {
- $this->_added( $edit->closing );
- } elseif ( $edit->type == 'delete' ) {
- $this->_deleted( $edit->orig );
- } elseif ( $edit->type == 'change' ) {
- $this->_changed( $edit->orig, $edit->closing );
- } else {
- trigger_error( 'Unknown edit type', E_USER_ERROR );
- }
- }
- $this->_end_block();
- wfProfileOut( __METHOD__ );
- }
-
- function _start_diff() {
- ob_start();
- }
-
- /**
- * @return string
- */
- function _end_diff() {
- $val = ob_get_contents();
- ob_end_clean();
- return $val;
- }
-
- /**
- * @param $xbeg
- * @param $xlen
- * @param $ybeg
- * @param $ylen
- * @return string
- */
- function _block_header( $xbeg, $xlen, $ybeg, $ylen ) {
- if ( $xlen > 1 ) {
- $xbeg .= ',' . ( $xbeg + $xlen - 1 );
- }
- if ( $ylen > 1 ) {
- $ybeg .= ',' . ( $ybeg + $ylen - 1 );
- }
-
- return $xbeg . ( $xlen ? ( $ylen ? 'c' : 'd' ) : 'a' ) . $ybeg;
- }
-
- function _start_block( $header ) {
- echo $header . "\n";
- }
-
- function _end_block() {
- }
-
- /**
- * @param $lines
- * @param $prefix string
- */
- function _lines( $lines, $prefix = ' ' ) {
- foreach ( $lines as $line ) {
- echo "$prefix $line\n";
- }
- }
-
- /**
- * @param $lines
- */
- function _context( $lines ) {
- $this->_lines( $lines );
- }
-
- /**
- * @param $lines
- */
- function _added( $lines ) {
- $this->_lines( $lines, '>' );
- }
-
- /**
- * @param $lines
- */
- function _deleted( $lines ) {
- $this->_lines( $lines, '<' );
- }
-
- /**
- * @param $orig
- * @param $closing
- */
- function _changed( $orig, $closing ) {
- $this->_deleted( $orig );
- echo "---\n";
- $this->_added( $closing );
- }
-}
-
-/**
- * A formatter that outputs unified diffs
- * @ingroup DifferenceEngine
- */
-class UnifiedDiffFormatter extends DiffFormatter {
- var $leading_context_lines = 2;
- var $trailing_context_lines = 2;
-
- /**
- * @param $lines
- */
- function _added( $lines ) {
- $this->_lines( $lines, '+' );
- }
-
- /**
- * @param $lines
- */
- function _deleted( $lines ) {
- $this->_lines( $lines, '-' );
- }
-
- /**
- * @param $orig
- * @param $closing
- */
- function _changed( $orig, $closing ) {
- $this->_deleted( $orig );
- $this->_added( $closing );
- }
-
- /**
- * @param $xbeg
- * @param $xlen
- * @param $ybeg
- * @param $ylen
- * @return string
- */
- function _block_header( $xbeg, $xlen, $ybeg, $ylen ) {
- return "@@ -$xbeg,$xlen +$ybeg,$ylen @@";
- }
-}
-
-/**
- * A pseudo-formatter that just passes along the Diff::$edits array
- * @ingroup DifferenceEngine
- */
-class ArrayDiffFormatter extends DiffFormatter {
-
- /**
- * @param $diff
- * @return array
- */
- function format( $diff ) {
- $oldline = 1;
- $newline = 1;
- $retval = array();
- foreach ( $diff->edits as $edit ) {
- switch ( $edit->type ) {
- case 'add':
- foreach ( $edit->closing as $l ) {
- $retval[] = array(
- 'action' => 'add',
- 'new' => $l,
- 'newline' => $newline++
- );
- }
- break;
- case 'delete':
- foreach ( $edit->orig as $l ) {
- $retval[] = array(
- 'action' => 'delete',
- 'old' => $l,
- 'oldline' => $oldline++,
- );
- }
- break;
- case 'change':
- foreach ( $edit->orig as $i => $l ) {
- $retval[] = array(
- 'action' => 'change',
- 'old' => $l,
- 'new' => isset( $edit->closing[$i] ) ? $edit->closing[$i] : null,
- 'oldline' => $oldline++,
- 'newline' => $newline++,
- );
- }
- break;
- case 'copy':
- $oldline += count( $edit->orig );
- $newline += count( $edit->orig );
- }
- }
- return $retval;
- }
-}
-
/**
* Additions by Axel Boldt follow, partly taken from diff.php, phpwiki-1.3.3
*/
-define( 'NBSP', ' ' ); // iso-8859-x non-breaking space.
-
/**
* @todo document
* @private
* @ingroup DifferenceEngine
*/
-class _HWLDF_WordAccumulator {
- function __construct() {
- $this->_lines = array();
- $this->_line = '';
- $this->_group = '';
- $this->_tag = '';
- }
+class HWLDF_WordAccumulator {
+ private $lines = array();
+ private $line = '';
+ private $group = '';
+ private $tag = '';
/**
* @param $new_tag
*/
- function _flushGroup( $new_tag ) {
- if ( $this->_group !== '' ) {
- if ( $this->_tag == 'ins' ) {
- $this->_line .= '<ins class="diffchange diffchange-inline">' .
- htmlspecialchars( $this->_group ) . '</ins>';
- } elseif ( $this->_tag == 'del' ) {
- $this->_line .= '<del class="diffchange diffchange-inline">' .
- htmlspecialchars( $this->_group ) . '</del>';
+ private function flushGroup( $new_tag ) {
+ if ( $this->group !== '' ) {
+ if ( $this->tag == 'ins' ) {
+ $this->line .= '<ins class="diffchange diffchange-inline">' .
+ htmlspecialchars( $this->group ) . '</ins>';
+ } elseif ( $this->tag == 'del' ) {
+ $this->line .= '<del class="diffchange diffchange-inline">' .
+ htmlspecialchars( $this->group ) . '</del>';
} else {
- $this->_line .= htmlspecialchars( $this->_group );
+ $this->line .= htmlspecialchars( $this->group );
}
}
- $this->_group = '';
- $this->_tag = $new_tag;
+ $this->group = '';
+ $this->tag = $new_tag;
}
/**
* @param $new_tag
*/
- function _flushLine( $new_tag ) {
- $this->_flushGroup( $new_tag );
- if ( $this->_line != '' ) {
- array_push( $this->_lines, $this->_line );
+ private function flushLine( $new_tag ) {
+ $this->flushGroup( $new_tag );
+ if ( $this->line != '' ) {
+ array_push( $this->lines, $this->line );
} else {
# make empty lines visible by inserting an NBSP
- array_push( $this->_lines, NBSP );
+ array_push( $this->lines, ' ' );
}
- $this->_line = '';
+ $this->line = '';
}
/**
* @param $words
* @param $tag string
*/
- function addWords( $words, $tag = '' ) {
- if ( $tag != $this->_tag ) {
- $this->_flushGroup( $tag );
+ public function addWords( $words, $tag = '' ) {
+ if ( $tag != $this->tag ) {
+ $this->flushGroup( $tag );
}
foreach ( $words as $word ) {
continue;
}
if ( $word[0] == "\n" ) {
- $this->_flushLine( $tag );
+ $this->flushLine( $tag );
$word = substr( $word, 1 );
}
assert( '!strstr( $word, "\n" )' );
- $this->_group .= $word;
+ $this->group .= $word;
}
}
/**
* @return array
*/
- function getLines() {
- $this->_flushLine( '~done' );
- return $this->_lines;
+ public function getLines() {
+ $this->flushLine( '~done' );
+ return $this->lines;
}
}
function __construct( $orig_lines, $closing_lines ) {
wfProfileIn( __METHOD__ );
- list( $orig_words, $orig_stripped ) = $this->_split( $orig_lines );
- list( $closing_words, $closing_stripped ) = $this->_split( $closing_lines );
+ list( $orig_words, $orig_stripped ) = $this->split( $orig_lines );
+ list( $closing_words, $closing_stripped ) = $this->split( $closing_lines );
parent::__construct( $orig_words, $closing_words,
$orig_stripped, $closing_stripped );
* @param $lines
* @return array
*/
- function _split( $lines ) {
+ private function split( $lines ) {
wfProfileIn( __METHOD__ );
$words = array();
/**
* @return array
*/
- function orig() {
+ public function orig() {
wfProfileIn( __METHOD__ );
- $orig = new _HWLDF_WordAccumulator;
+ $orig = new HWLDF_WordAccumulator;
foreach ( $this->edits as $edit ) {
if ( $edit->type == 'copy' ) {
/**
* @return array
*/
- function closing() {
+ public function closing() {
wfProfileIn( __METHOD__ );
- $closing = new _HWLDF_WordAccumulator;
+ $closing = new HWLDF_WordAccumulator;
foreach ( $this->edits as $edit ) {
if ( $edit->type == 'copy' ) {
return $lines;
}
}
-
-/**
- * Wikipedia Table style diff formatter.
- * @todo document
- * @private
- * @ingroup DifferenceEngine
- */
-class TableDiffFormatter extends DiffFormatter {
- function __construct() {
- $this->leading_context_lines = 2;
- $this->trailing_context_lines = 2;
- }
-
- /**
- * @static
- * @param $msg
- * @return mixed
- */
- public static function escapeWhiteSpace( $msg ) {
- $msg = preg_replace( '/^ /m', '  ', $msg );
- $msg = preg_replace( '/ $/m', '  ', $msg );
- $msg = preg_replace( '/ /', '  ', $msg );
- return $msg;
- }
-
- /**
- * @param $xbeg
- * @param $xlen
- * @param $ybeg
- * @param $ylen
- * @return string
- */
- function _block_header( $xbeg, $xlen, $ybeg, $ylen ) {
- $r = '<tr><td colspan="2" class="diff-lineno"><!--LINE ' . $xbeg . "--></td>\n" .
- '<td colspan="2" class="diff-lineno"><!--LINE ' . $ybeg . "--></td></tr>\n";
- return $r;
- }
-
- /**
- * @param $header
- */
- function _start_block( $header ) {
- echo $header;
- }
-
- function _end_block() {
- }
-
- function _lines( $lines, $prefix = ' ', $color = 'white' ) {
- }
-
- /**
- * HTML-escape parameter before calling this
- * @param $line
- * @return string
- */
- function addedLine( $line ) {
- return $this->wrapLine( '+', 'diff-addedline', $line );
- }
-
- /**
- * HTML-escape parameter before calling this
- * @param $line
- * @return string
- */
- function deletedLine( $line ) {
- return $this->wrapLine( '−', 'diff-deletedline', $line );
- }
-
- /**
- * HTML-escape parameter before calling this
- * @param $line
- * @return string
- */
- function contextLine( $line ) {
- return $this->wrapLine( ' ', 'diff-context', $line );
- }
-
- /**
- * @param $marker
- * @param $class
- * @param $line
- * @return string
- */
- private function wrapLine( $marker, $class, $line ) {
- if ( $line !== '' ) {
- // The <div> wrapper is needed for 'overflow: auto' style to scroll properly
- $line = Xml::tags( 'div', null, $this->escapeWhiteSpace( $line ) );
- }
- return "<td class='diff-marker'>$marker</td><td class='$class'>$line</td>";
- }
-
- /**
- * @return string
- */
- function emptyLine() {
- return '<td colspan="2"> </td>';
- }
-
- /**
- * @param $lines array
- */
- function _added( $lines ) {
- foreach ( $lines as $line ) {
- echo '<tr>' . $this->emptyLine() .
- $this->addedLine( '<ins class="diffchange">' .
- htmlspecialchars( $line ) . '</ins>' ) . "</tr>\n";
- }
- }
-
- /**
- * @param $lines
- */
- function _deleted( $lines ) {
- foreach ( $lines as $line ) {
- echo '<tr>' . $this->deletedLine( '<del class="diffchange">' .
- htmlspecialchars( $line ) . '</del>' ) .
- $this->emptyLine() . "</tr>\n";
- }
- }
-
- /**
- * @param $lines
- */
- function _context( $lines ) {
- foreach ( $lines as $line ) {
- echo '<tr>' .
- $this->contextLine( htmlspecialchars( $line ) ) .
- $this->contextLine( htmlspecialchars( $line ) ) . "</tr>\n";
- }
- }
-
- /**
- * @param $orig
- * @param $closing
- */
- function _changed( $orig, $closing ) {
- wfProfileIn( __METHOD__ );
-
- $diff = new WordLevelDiff( $orig, $closing );
- $del = $diff->orig();
- $add = $diff->closing();
-
- # Notice that WordLevelDiff returns HTML-escaped output.
- # Hence, we will be calling addedLine/deletedLine without HTML-escaping.
-
- while ( $line = array_shift( $del ) ) {
- $aline = array_shift( $add );
- echo '<tr>' . $this->deletedLine( $line ) .
- $this->addedLine( $aline ) . "</tr>\n";
- }
- foreach ( $add as $line ) { # If any leftovers
- echo '<tr>' . $this->emptyLine() .
- $this->addedLine( $line ) . "</tr>\n";
- }
- wfProfileOut( __METHOD__ );
- }
-}
--- /dev/null
+<?php
+/**
+ * Base for diff rendering classes. Portions taken from phpwiki-1.3.3.
+ *
+ * Copyright © 2000, 2001 Geoffrey T. Dairiki <dairiki@dairiki.org>
+ * You may copy this code freely under the conditions of the GPL.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ * http://www.gnu.org/copyleft/gpl.html
+ *
+ * @file
+ * @ingroup DifferenceEngine
+ */
+
+/**
+ * Base class for diff formatters
+ *
+ * This class formats the diff in classic diff format.
+ * It is intended that this class be customized via inheritance,
+ * to obtain fancier outputs.
+ * @todo document
+ * @ingroup DifferenceEngine
+ */
+abstract class DiffFormatter {
+ /**
+ * Number of leading context "lines" to preserve.
+ *
+ * This should be left at zero for this class, but subclasses
+ * may want to set this to other values.
+ */
+ protected $leadingContextLines = 0;
+
+ /**
+ * Number of trailing context "lines" to preserve.
+ *
+ * This should be left at zero for this class, but subclasses
+ * may want to set this to other values.
+ */
+ protected $trailingContextLines = 0;
+
+ /**
+ * Format a diff.
+ *
+ * @param $diff Diff A Diff object.
+ * @return string The formatted output.
+ */
+ public function format( $diff ) {
+ wfProfileIn( __METHOD__ );
+
+ $xi = $yi = 1;
+ $block = false;
+ $context = array();
+
+ $nlead = $this->leadingContextLines;
+ $ntrail = $this->trailingContextLines;
+
+ $this->startDiff();
+
+ foreach ( $diff->edits as $edit ) {
+ if ( $edit->type == 'copy' ) {
+ if ( is_array( $block ) ) {
+ if ( count( $edit->orig ) <= $nlead + $ntrail ) {
+ $block[] = $edit;
+ } else {
+ if ( $ntrail ) {
+ $context = array_slice( $edit->orig, 0, $ntrail );
+ $block[] = new DiffOp_Copy( $context );
+ }
+ $this->block( $x0, $ntrail + $xi - $x0,
+ $y0, $ntrail + $yi - $y0,
+ $block );
+ $block = false;
+ }
+ }
+ $context = $edit->orig;
+ } else {
+ if ( !is_array( $block ) ) {
+ $context = array_slice( $context, count( $context ) - $nlead );
+ $x0 = $xi - count( $context );
+ $y0 = $yi - count( $context );
+ $block = array();
+ if ( $context ) {
+ $block[] = new DiffOp_Copy( $context );
+ }
+ }
+ $block[] = $edit;
+ }
+
+ if ( $edit->orig ) {
+ $xi += count( $edit->orig );
+ }
+ if ( $edit->closing ) {
+ $yi += count( $edit->closing );
+ }
+ }
+
+ if ( is_array( $block ) ) {
+ $this->block( $x0, $xi - $x0,
+ $y0, $yi - $y0,
+ $block );
+ }
+
+ $end = $this->endDiff();
+ wfProfileOut( __METHOD__ );
+ return $end;
+ }
+
+ /**
+ * @param $xbeg
+ * @param $xlen
+ * @param $ybeg
+ * @param $ylen
+ * @param $edits
+ */
+ protected function block( $xbeg, $xlen, $ybeg, $ylen, &$edits ) {
+ wfProfileIn( __METHOD__ );
+ $this->startBlock( $this->blockHeader( $xbeg, $xlen, $ybeg, $ylen ) );
+ foreach ( $edits as $edit ) {
+ if ( $edit->type == 'copy' ) {
+ $this->context( $edit->orig );
+ } elseif ( $edit->type == 'add' ) {
+ $this->added( $edit->closing );
+ } elseif ( $edit->type == 'delete' ) {
+ $this->deleted( $edit->orig );
+ } elseif ( $edit->type == 'change' ) {
+ $this->changed( $edit->orig, $edit->closing );
+ } else {
+ throw new MWException( "Unknown edit type: {$edit->type}" );
+ }
+ }
+ $this->endBlock();
+ wfProfileOut( __METHOD__ );
+ }
+
+ protected function startDiff() {
+ ob_start();
+ }
+
+ /**
+ * @return string
+ */
+ protected function endDiff() {
+ $val = ob_get_contents();
+ ob_end_clean();
+ return $val;
+ }
+
+ /**
+ * @param $xbeg
+ * @param $xlen
+ * @param $ybeg
+ * @param $ylen
+ * @return string
+ */
+ protected function blockHeader( $xbeg, $xlen, $ybeg, $ylen ) {
+ if ( $xlen > 1 ) {
+ $xbeg .= ',' . ( $xbeg + $xlen - 1 );
+ }
+ if ( $ylen > 1 ) {
+ $ybeg .= ',' . ( $ybeg + $ylen - 1 );
+ }
+
+ return $xbeg . ( $xlen ? ( $ylen ? 'c' : 'd' ) : 'a' ) . $ybeg;
+ }
+
+ protected function startBlock( $header ) {
+ echo $header . "\n";
+ }
+
+ protected function endBlock() {
+ }
+
+ /**
+ * @param $lines
+ * @param $prefix string
+ */
+ protected function lines( $lines, $prefix = ' ' ) {
+ foreach ( $lines as $line ) {
+ echo "$prefix $line\n";
+ }
+ }
+
+ /**
+ * @param $lines
+ */
+ protected function context( $lines ) {
+ $this->lines( $lines );
+ }
+
+ /**
+ * @param $lines
+ */
+ protected function added( $lines ) {
+ $this->lines( $lines, '>' );
+ }
+
+ /**
+ * @param $lines
+ */
+ protected function deleted( $lines ) {
+ $this->lines( $lines, '<' );
+ }
+
+ /**
+ * @param $orig
+ * @param $closing
+ */
+ protected function changed( $orig, $closing ) {
+ $this->deleted( $orig );
+ echo "---\n";
+ $this->added( $closing );
+ }
+}
--- /dev/null
+<?php
+/**
+ * Portions taken from phpwiki-1.3.3.
+ *
+ * Copyright © 2000, 2001 Geoffrey T. Dairiki <dairiki@dairiki.org>
+ * You may copy this code freely under the conditions of the GPL.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ * http://www.gnu.org/copyleft/gpl.html
+ *
+ * @file
+ * @ingroup DifferenceEngine
+ */
+
+/**
+ * MediaWiki default table style diff formatter
+ * @todo document
+ * @private
+ * @ingroup DifferenceEngine
+ */
+class TableDiffFormatter extends DiffFormatter {
+ function __construct() {
+ $this->leadingContextLines = 2;
+ $this->trailingContextLines = 2;
+ }
+
+ /**
+ * @static
+ * @param $msg
+ * @return mixed
+ */
+ public static function escapeWhiteSpace( $msg ) {
+ $msg = preg_replace( '/^ /m', '  ', $msg );
+ $msg = preg_replace( '/ $/m', '  ', $msg );
+ $msg = preg_replace( '/ /', '  ', $msg );
+ return $msg;
+ }
+
+ /**
+ * @param $xbeg
+ * @param $xlen
+ * @param $ybeg
+ * @param $ylen
+ * @return string
+ */
+ protected function blockHeader( $xbeg, $xlen, $ybeg, $ylen ) {
+ $r = '<tr><td colspan="2" class="diff-lineno"><!--LINE ' . $xbeg . "--></td>\n" .
+ '<td colspan="2" class="diff-lineno"><!--LINE ' . $ybeg . "--></td></tr>\n";
+ return $r;
+ }
+
+ /**
+ * @param $header
+ */
+ protected function startBlock( $header ) {
+ echo $header;
+ }
+
+ protected function endBlock() {
+ }
+
+ protected function lines( $lines, $prefix = ' ', $color = 'white' ) {
+ }
+
+ /**
+ * HTML-escape parameter before calling this
+ * @param $line
+ * @return string
+ */
+ protected function addedLine( $line ) {
+ return $this->wrapLine( '+', 'diff-addedline', $line );
+ }
+
+ /**
+ * HTML-escape parameter before calling this
+ * @param $line
+ * @return string
+ */
+ protected function deletedLine( $line ) {
+ return $this->wrapLine( '−', 'diff-deletedline', $line );
+ }
+
+ /**
+ * HTML-escape parameter before calling this
+ * @param $line
+ * @return string
+ */
+ protected function contextLine( $line ) {
+ return $this->wrapLine( ' ', 'diff-context', $line );
+ }
+
+ /**
+ * @param $marker
+ * @param $class
+ * @param $line
+ * @return string
+ */
+ protected function wrapLine( $marker, $class, $line ) {
+ if ( $line !== '' ) {
+ // The <div> wrapper is needed for 'overflow: auto' style to scroll properly
+ $line = Xml::tags( 'div', null, $this->escapeWhiteSpace( $line ) );
+ }
+ return "<td class='diff-marker'>$marker</td><td class='$class'>$line</td>";
+ }
+
+ /**
+ * @return string
+ */
+ protected function emptyLine() {
+ return '<td colspan="2"> </td>';
+ }
+
+ /**
+ * @param $lines array
+ */
+ protected function added( $lines ) {
+ foreach ( $lines as $line ) {
+ echo '<tr>' . $this->emptyLine() .
+ $this->addedLine( '<ins class="diffchange">' .
+ htmlspecialchars( $line ) . '</ins>' ) . "</tr>\n";
+ }
+ }
+
+ /**
+ * @param $lines
+ */
+ protected function deleted( $lines ) {
+ foreach ( $lines as $line ) {
+ echo '<tr>' . $this->deletedLine( '<del class="diffchange">' .
+ htmlspecialchars( $line ) . '</del>' ) .
+ $this->emptyLine() . "</tr>\n";
+ }
+ }
+
+ /**
+ * @param $lines
+ */
+ protected function context( $lines ) {
+ foreach ( $lines as $line ) {
+ echo '<tr>' .
+ $this->contextLine( htmlspecialchars( $line ) ) .
+ $this->contextLine( htmlspecialchars( $line ) ) . "</tr>\n";
+ }
+ }
+
+ /**
+ * @param $orig
+ * @param $closing
+ */
+ protected function changed( $orig, $closing ) {
+ wfProfileIn( __METHOD__ );
+
+ $diff = new WordLevelDiff( $orig, $closing );
+ $del = $diff->orig();
+ $add = $diff->closing();
+
+ # Notice that WordLevelDiff returns HTML-escaped output.
+ # Hence, we will be calling addedLine/deletedLine without HTML-escaping.
+
+ while ( $line = array_shift( $del ) ) {
+ $aline = array_shift( $add );
+ echo '<tr>' . $this->deletedLine( $line ) .
+ $this->addedLine( $aline ) . "</tr>\n";
+ }
+ foreach ( $add as $line ) { # If any leftovers
+ echo '<tr>' . $this->emptyLine() .
+ $this->addedLine( $line ) . "</tr>\n";
+ }
+ wfProfileOut( __METHOD__ );
+ }
+}
dépôts / lhc / web / wiklou.git / commitdiff