_show_split_view = $params['show_split_view'];
}
}
public function _startBlock( $header ) {
return '';
}
public function _lines( $lines, $prefix = ' ' ) {
}
public function addedLine( $line ) {
return "| " .
/* translators: Hidden accessibility text. */
__( 'Added:' ) .
" {$line} | ";
}
public function deletedLine( $line ) {
return "" .
/* translators: Hidden accessibility text. */
__( 'Deleted:' ) .
" {$line} | ";
}
public function contextLine( $line ) {
return "" .
/* translators: Hidden accessibility text. */
__( 'Unchanged:' ) .
" {$line} | ";
}
public function emptyLine() {
return ' | ';
}
public function _added( $lines, $encode = true ) {
$r = '';
foreach ( $lines as $line ) {
if ( $encode ) {
$processed_line = htmlspecialchars( $line );
$line = apply_filters( 'process_text_diff_html', $processed_line, $line, 'added' );
}
if ( $this->_show_split_view ) {
$r .= '' . $this->emptyLine() . $this->addedLine( $line ) . "
\n";
} else {
$r .= '' . $this->addedLine( $line ) . "
\n";
}
}
return $r;
}
public function _deleted( $lines, $encode = true ) {
$r = '';
foreach ( $lines as $line ) {
if ( $encode ) {
$processed_line = htmlspecialchars( $line );
$line = apply_filters( 'process_text_diff_html', $processed_line, $line, 'deleted' );
}
if ( $this->_show_split_view ) {
$r .= '' . $this->deletedLine( $line ) . $this->emptyLine() . "
\n";
} else {
$r .= '' . $this->deletedLine( $line ) . "
\n";
}
}
return $r;
}
public function _context( $lines, $encode = true ) {
$r = '';
foreach ( $lines as $line ) {
if ( $encode ) {
$processed_line = htmlspecialchars( $line );
$line = apply_filters( 'process_text_diff_html', $processed_line, $line, 'unchanged' );
}
if ( $this->_show_split_view ) {
$r .= '' . $this->contextLine( $line ) . $this->contextLine( $line ) . "
\n";
} else {
$r .= '' . $this->contextLine( $line ) . "
\n";
}
}
return $r;
}
public function _changed( $orig, $final ) { // phpcs:ignore Universal.NamingConventions.NoReservedKeywordParameterNames.finalFound
$r = '';
/*
* Does the aforementioned additional processing:
* *_matches tell what rows are "the same" in orig and final. Those pairs will be diffed to get word changes.
* - match is numeric: an index in other column.
* - match is 'X': no match. It is a new row.
* *_rows are column vectors for the orig column and the final column.
* - row >= 0: an index of the $orig or $final array.
* - row < 0: a blank row for that column.
*/
list($orig_matches, $final_matches, $orig_rows, $final_rows) = $this->interleave_changed_lines( $orig, $final );
// These will hold the word changes as determined by an inline diff.
$orig_diffs = array();
$final_diffs = array();
// Compute word diffs for each matched pair using the inline diff.
foreach ( $orig_matches as $o => $f ) {
if ( is_numeric( $o ) && is_numeric( $f ) ) {
$text_diff = new Text_Diff( 'auto', array( array( $orig[ $o ] ), array( $final[ $f ] ) ) );
$renderer = new $this->inline_diff_renderer();
$diff = $renderer->render( $text_diff );
// If they're too different, don't include any or 's.
if ( preg_match_all( '!(.*?|.*?)!', $diff, $diff_matches ) ) {
// Length of all text between or .
$stripped_matches = strlen( strip_tags( implode( ' ', $diff_matches[0] ) ) );
/*
* Since we count length of text between or (instead of picking just one),
* we double the length of chars not in those tags.
*/
$stripped_diff = strlen( strip_tags( $diff ) ) * 2 - $stripped_matches;
$diff_ratio = $stripped_matches / $stripped_diff;
if ( $diff_ratio > $this->_diff_threshold ) {
continue; // Too different. Don't save diffs.
}
}
// Un-inline the diffs by removing or .
$orig_diffs[ $o ] = preg_replace( '|.*?|', '', $diff );
$final_diffs[ $f ] = preg_replace( '|.*?|', '', $diff );
}
}
foreach ( array_keys( $orig_rows ) as $row ) {
// Both columns have blanks. Ignore them.
if ( $orig_rows[ $row ] < 0 && $final_rows[ $row ] < 0 ) {
continue;
}
// If we have a word based diff, use it. Otherwise, use the normal line.
if ( isset( $orig_diffs[ $orig_rows[ $row ] ] ) ) {
$orig_line = $orig_diffs[ $orig_rows[ $row ] ];
} elseif ( isset( $orig[ $orig_rows[ $row ] ] ) ) {
$orig_line = htmlspecialchars( $orig[ $orig_rows[ $row ] ] );
} else {
$orig_line = '';
}
if ( isset( $final_diffs[ $final_rows[ $row ] ] ) ) {
$final_line = $final_diffs[ $final_rows[ $row ] ];
} elseif ( isset( $final[ $final_rows[ $row ] ] ) ) {
$final_line = htmlspecialchars( $final[ $final_rows[ $row ] ] );
} else {
$final_line = '';
}
if ( $orig_rows[ $row ] < 0 ) { // Orig is blank. This is really an added row.
$r .= $this->_added( array( $final_line ), false );
} elseif ( $final_rows[ $row ] < 0 ) { // Final is blank. This is really a deleted row.
$r .= $this->_deleted( array( $orig_line ), false );
} else { // A true changed row.
if ( $this->_show_split_view ) {
$r .= '' . $this->deletedLine( $orig_line ) . $this->addedLine( $final_line ) . "
\n";
} else {
$r .= '' . $this->deletedLine( $orig_line ) . '
' . $this->addedLine( $final_line ) . "
\n";
}
}
}
return $r;
}
public function interleave_changed_lines( $orig, $final ) { // phpcs:ignore Universal.NamingConventions.NoReservedKeywordParameterNames.finalFound
// Contains all pairwise string comparisons. Keys are such that this need only be a one dimensional array.
$matches = array();
foreach ( array_keys( $orig ) as $o ) {
foreach ( array_keys( $final ) as $f ) {
$matches[ "$o,$f" ] = $this->compute_string_distance( $orig[ $o ], $final[ $f ] );
}
}
asort( $matches ); // Order by string distance.
$orig_matches = array();
$final_matches = array();
foreach ( $matches as $keys => $difference ) {
list($o, $f) = explode( ',', $keys );
$o = (int) $o;
$f = (int) $f;
// Already have better matches for these guys.
if ( isset( $orig_matches[ $o ] ) && isset( $final_matches[ $f ] ) ) {
continue;
}
// First match for these guys. Must be best match.
if ( ! isset( $orig_matches[ $o ] ) && ! isset( $final_matches[ $f ] ) ) {
$orig_matches[ $o ] = $f;
$final_matches[ $f ] = $o;
continue;
}
// Best match of this final is already taken? Must mean this final is a new row.
if ( isset( $orig_matches[ $o ] ) ) {
$final_matches[ $f ] = 'x';
} elseif ( isset( $final_matches[ $f ] ) ) {
// Best match of this orig is already taken? Must mean this orig is a deleted row.
$orig_matches[ $o ] = 'x';
}
}
// We read the text in this order.
ksort( $orig_matches );
ksort( $final_matches );
// Stores rows and blanks for each column.
$orig_rows = array_keys( $orig_matches );
$orig_rows_copy = $orig_rows;
$final_rows = array_keys( $final_matches );
/*
* Interleaves rows with blanks to keep matches aligned.
* We may end up with some extraneous blank rows, but we'll just ignore them later.
*/
foreach ( $orig_rows_copy as $orig_row ) {
$final_pos = array_search( $orig_matches[ $orig_row ], $final_rows, true );
$orig_pos = (int) array_search( $orig_row, $orig_rows, true );
if ( false === $final_pos ) { // This orig is paired with a blank final.
array_splice( $final_rows, $orig_pos, 0, -1 );
} elseif ( $final_pos < $orig_pos ) { // This orig's match is up a ways. Pad final with blank rows.
$diff_array = range( -1, $final_pos - $orig_pos );
array_splice( $final_rows, $orig_pos, 0, $diff_array );
} elseif ( $final_pos > $orig_pos ) { // This orig's match is down a ways. Pad orig with blank rows.
$diff_array = range( -1, $orig_pos - $final_pos );
array_splice( $orig_rows, $orig_pos, 0, $diff_array );
}
}
// Pad the ends with blank rows if the columns aren't the same length.
$diff_count = count( $orig_rows ) - count( $final_rows );
if ( $diff_count < 0 ) {
while ( $diff_count < 0 ) {
array_push( $orig_rows, $diff_count++ );
}
} elseif ( $diff_count > 0 ) {
$diff_count = -1 * $diff_count;
while ( $diff_count < 0 ) {
array_push( $final_rows, $diff_count++ );
}
}
return array( $orig_matches, $final_matches, $orig_rows, $final_rows );
}
public function compute_string_distance( $string1, $string2 ) {
// Use an md5 hash of the strings for a count cache, as it's fast to generate, and collisions aren't a concern.
$count_key1 = md5( $string1 );
$count_key2 = md5( $string2 );
// Cache vectors containing character frequency for all chars in each string.
if ( ! isset( $this->count_cache[ $count_key1 ] ) ) {
$this->count_cache[ $count_key1 ] = count_chars( $string1 );
}
if ( ! isset( $this->count_cache[ $count_key2 ] ) ) {
$this->count_cache[ $count_key2 ] = count_chars( $string2 );
}
$chars1 = $this->count_cache[ $count_key1 ];
$chars2 = $this->count_cache[ $count_key2 ];
$difference_key = md5( implode( ',', $chars1 ) . ':' . implode( ',', $chars2 ) );
if ( ! isset( $this->difference_cache[ $difference_key ] ) ) {
// L1-norm of difference vector.
$this->difference_cache[ $difference_key ] = array_sum( array_map( array( $this, 'difference' ), $chars1, $chars2 ) );
}
$difference = $this->difference_cache[ $difference_key ];
// $string1 has zero length? Odd. Give huge penalty by not dividing.
if ( ! $string1 ) {
return $difference;
}
// Return distance per character (of string1).
return $difference / strlen( $string1 );
}
public function difference( $a, $b ) {
return abs( $a - $b );
}
public function __get( $name ) {
if ( in_array( $name, $this->compat_fields, true ) ) {
return $this->$name;
}
wp_trigger_error(
__METHOD__,
"The property `{$name}` is not declared. Getting a dynamic property is " .
'deprecated since version 6.4.0! Instead, declare the property on the class.',
E_USER_DEPRECATED
);
return null;
}
public function __set( $name, $value ) {
if ( in_array( $name, $this->compat_fields, true ) ) {
$this->$name = $value;
return;
}
wp_trigger_error(
__METHOD__,
"The property `{$name}` is not declared. Setting a dynamic property is " .
'deprecated since version 6.4.0! Instead, declare the property on the class.',
E_USER_DEPRECATED
);
}
public function __isset( $name ) {
if ( in_array( $name, $this->compat_fields, true ) ) {
return isset( $this->$name );
}
wp_trigger_error(
__METHOD__,
"The property `{$name}` is not declared. Checking `isset()` on a dynamic property " .
'is deprecated since version 6.4.0! Instead, declare the property on the class.',
E_USER_DEPRECATED
);
return false;
}
public function __unset( $name ) {
if ( in_array( $name, $this->compat_fields, true ) ) {
unset( $this->$name );
return;
}
wp_trigger_error(
__METHOD__,
"A property `{$name}` is not declared. Unsetting a dynamic property is " .
'deprecated since version 6.4.0! Instead, declare the property on the class.',
E_USER_DEPRECATED
);
}
}