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0860bb2771
Prior to about 2013, many class methods lacked even access modifiers which made the `@access` notations that much more useful. Now that we've gotten to a point where the codebase is more mature from a maintenance perspective and we can finally remove these notations. Notable exceptions to this change include standalone functions notated as private as well as some classes still considered to represent "private" APIs. See #41452. Built from https://develop.svn.wordpress.org/trunk@41162 git-svn-id: http://core.svn.wordpress.org/trunk@41002 1a063a9b-81f0-0310-95a4-ce76da25c4cd
511 lines
15 KiB
PHP
511 lines
15 KiB
PHP
<?php
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/**
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* Diff API: WP_Text_Diff_Renderer_Table class
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*
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* @package WordPress
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* @subpackage Diff
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* @since 4.7.0
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*/
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/**
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* Table renderer to display the diff lines.
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*
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* @since 2.6.0
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* @uses Text_Diff_Renderer Extends
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*/
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class WP_Text_Diff_Renderer_Table extends Text_Diff_Renderer {
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/**
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* @see Text_Diff_Renderer::_leading_context_lines
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* @var int
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* @since 2.6.0
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*/
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public $_leading_context_lines = 10000;
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/**
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* @see Text_Diff_Renderer::_trailing_context_lines
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* @var int
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* @since 2.6.0
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*/
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public $_trailing_context_lines = 10000;
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/**
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* Threshold for when a diff should be saved or omitted.
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*
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* @var float
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* @since 2.6.0
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*/
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protected $_diff_threshold = 0.6;
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/**
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* Inline display helper object name.
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*
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* @var string
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* @since 2.6.0
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*/
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protected $inline_diff_renderer = 'WP_Text_Diff_Renderer_inline';
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/**
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* Should we show the split view or not
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*
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* @var string
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* @since 3.6.0
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*/
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protected $_show_split_view = true;
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protected $compat_fields = array( '_show_split_view', 'inline_diff_renderer', '_diff_threshold' );
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/**
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* Constructor - Call parent constructor with params array.
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*
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* This will set class properties based on the key value pairs in the array.
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*
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* @since 2.6.0
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*
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* @param array $params
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*/
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public function __construct( $params = array() ) {
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parent::__construct( $params );
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if ( isset( $params[ 'show_split_view' ] ) )
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$this->_show_split_view = $params[ 'show_split_view' ];
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}
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/**
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* @ignore
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*
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* @param string $header
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* @return string
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*/
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public function _startBlock( $header ) {
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return '';
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}
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/**
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* @ignore
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*
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* @param array $lines
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* @param string $prefix
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*/
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public function _lines( $lines, $prefix=' ' ) {
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}
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/**
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* @ignore
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*
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* @param string $line HTML-escape the value.
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* @return string
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*/
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public function addedLine( $line ) {
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return "<td class='diff-addedline'>{$line}</td>";
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}
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/**
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* @ignore
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*
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* @param string $line HTML-escape the value.
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* @return string
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*/
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public function deletedLine( $line ) {
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return "<td class='diff-deletedline'>{$line}</td>";
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}
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/**
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* @ignore
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*
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* @param string $line HTML-escape the value.
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* @return string
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*/
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public function contextLine( $line ) {
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return "<td class='diff-context'>{$line}</td>";
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}
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/**
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* @ignore
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*
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* @return string
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*/
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public function emptyLine() {
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return '<td> </td>';
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}
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/**
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* @ignore
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*
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* @param array $lines
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* @param bool $encode
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* @return string
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*/
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public function _added( $lines, $encode = true ) {
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$r = '';
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foreach ($lines as $line) {
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if ( $encode ) {
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$processed_line = htmlspecialchars( $line );
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/**
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* Contextually filters a diffed line.
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*
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* Filters TextDiff processing of diffed line. By default, diffs are processed with
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* htmlspecialchars. Use this filter to remove or change the processing. Passes a context
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* indicating if the line is added, deleted or unchanged.
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*
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* @since 4.1.0
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*
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* @param String $processed_line The processed diffed line.
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* @param String $line The unprocessed diffed line.
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* @param string null The line context. Values are 'added', 'deleted' or 'unchanged'.
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*/
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$line = apply_filters( 'process_text_diff_html', $processed_line, $line, 'added' );
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}
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if ( $this->_show_split_view ) {
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$r .= '<tr>' . $this->emptyLine() . $this->emptyLine() . $this->addedLine( $line ) . "</tr>\n";
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} else {
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$r .= '<tr>' . $this->addedLine( $line ) . "</tr>\n";
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}
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}
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return $r;
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}
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/**
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* @ignore
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*
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* @param array $lines
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* @param bool $encode
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* @return string
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*/
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public function _deleted( $lines, $encode = true ) {
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$r = '';
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foreach ($lines as $line) {
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if ( $encode ) {
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$processed_line = htmlspecialchars( $line );
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/** This filter is documented in wp-includes/wp-diff.php */
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$line = apply_filters( 'process_text_diff_html', $processed_line, $line, 'deleted' );
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}
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if ( $this->_show_split_view ) {
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$r .= '<tr>' . $this->deletedLine( $line ) . $this->emptyLine() . $this->emptyLine() . "</tr>\n";
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} else {
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$r .= '<tr>' . $this->deletedLine( $line ) . "</tr>\n";
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}
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}
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return $r;
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}
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/**
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* @ignore
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*
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* @param array $lines
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* @param bool $encode
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* @return string
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*/
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public function _context( $lines, $encode = true ) {
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$r = '';
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foreach ($lines as $line) {
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if ( $encode ) {
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$processed_line = htmlspecialchars( $line );
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/** This filter is documented in wp-includes/wp-diff.php */
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$line = apply_filters( 'process_text_diff_html', $processed_line, $line, 'unchanged' );
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}
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if ( $this->_show_split_view ) {
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$r .= '<tr>' . $this->contextLine( $line ) . $this->emptyLine() . $this->contextLine( $line ) . "</tr>\n";
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} else {
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$r .= '<tr>' . $this->contextLine( $line ) . "</tr>\n";
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}
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}
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return $r;
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}
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/**
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* Process changed lines to do word-by-word diffs for extra highlighting.
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*
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* (TRAC style) sometimes these lines can actually be deleted or added rows.
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* We do additional processing to figure that out
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*
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* @since 2.6.0
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*
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* @param array $orig
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* @param array $final
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* @return string
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*/
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public function _changed( $orig, $final ) {
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$r = '';
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// Does the aforementioned additional processing
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// *_matches tell what rows are "the same" in orig and final. Those pairs will be diffed to get word changes
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// match is numeric: an index in other column
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// match is 'X': no match. It is a new row
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// *_rows are column vectors for the orig column and the final column.
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// row >= 0: an indix of the $orig or $final array
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// row < 0: a blank row for that column
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list($orig_matches, $final_matches, $orig_rows, $final_rows) = $this->interleave_changed_lines( $orig, $final );
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// These will hold the word changes as determined by an inline diff
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$orig_diffs = array();
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$final_diffs = array();
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// Compute word diffs for each matched pair using the inline diff
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foreach ( $orig_matches as $o => $f ) {
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if ( is_numeric($o) && is_numeric($f) ) {
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$text_diff = new Text_Diff( 'auto', array( array($orig[$o]), array($final[$f]) ) );
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$renderer = new $this->inline_diff_renderer;
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$diff = $renderer->render( $text_diff );
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// If they're too different, don't include any <ins> or <dels>
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if ( preg_match_all( '!(<ins>.*?</ins>|<del>.*?</del>)!', $diff, $diff_matches ) ) {
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// length of all text between <ins> or <del>
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$stripped_matches = strlen(strip_tags( join(' ', $diff_matches[0]) ));
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// since we count lengith of text between <ins> or <del> (instead of picking just one),
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// we double the length of chars not in those tags.
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$stripped_diff = strlen(strip_tags( $diff )) * 2 - $stripped_matches;
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$diff_ratio = $stripped_matches / $stripped_diff;
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if ( $diff_ratio > $this->_diff_threshold )
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continue; // Too different. Don't save diffs.
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}
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// Un-inline the diffs by removing del or ins
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$orig_diffs[$o] = preg_replace( '|<ins>.*?</ins>|', '', $diff );
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$final_diffs[$f] = preg_replace( '|<del>.*?</del>|', '', $diff );
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}
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}
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foreach ( array_keys($orig_rows) as $row ) {
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// Both columns have blanks. Ignore them.
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if ( $orig_rows[$row] < 0 && $final_rows[$row] < 0 )
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continue;
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// If we have a word based diff, use it. Otherwise, use the normal line.
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if ( isset( $orig_diffs[$orig_rows[$row]] ) )
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$orig_line = $orig_diffs[$orig_rows[$row]];
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elseif ( isset( $orig[$orig_rows[$row]] ) )
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$orig_line = htmlspecialchars($orig[$orig_rows[$row]]);
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else
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$orig_line = '';
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if ( isset( $final_diffs[$final_rows[$row]] ) )
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$final_line = $final_diffs[$final_rows[$row]];
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elseif ( isset( $final[$final_rows[$row]] ) )
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$final_line = htmlspecialchars($final[$final_rows[$row]]);
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else
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$final_line = '';
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if ( $orig_rows[$row] < 0 ) { // Orig is blank. This is really an added row.
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$r .= $this->_added( array($final_line), false );
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} elseif ( $final_rows[$row] < 0 ) { // Final is blank. This is really a deleted row.
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$r .= $this->_deleted( array($orig_line), false );
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} else { // A true changed row.
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if ( $this->_show_split_view ) {
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$r .= '<tr>' . $this->deletedLine( $orig_line ) . $this->emptyLine() . $this->addedLine( $final_line ) . "</tr>\n";
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} else {
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$r .= '<tr>' . $this->deletedLine( $orig_line ) . "</tr><tr>" . $this->addedLine( $final_line ) . "</tr>\n";
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}
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}
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}
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return $r;
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}
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/**
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* Takes changed blocks and matches which rows in orig turned into which rows in final.
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*
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* @since 2.6.0
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*
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* @param array $orig Lines of the original version of the text.
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* @param array $final Lines of the final version of the text.
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* @return array {
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* Array containing results of comparing the original text to the final text.
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*
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* @type array $orig_matches Associative array of original matches. Index == row
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* number of `$orig`, value == corresponding row number
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* of that same line in `$final` or 'x' if there is no
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* corresponding row (indicating it is a deleted line).
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* @type array $final_matches Associative array of final matches. Index == row
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* number of `$final`, value == corresponding row number
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* of that same line in `$orig` or 'x' if there is no
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* corresponding row (indicating it is a new line).
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* @type array $orig_rows Associative array of interleaved rows of `$orig` with
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* blanks to keep matches aligned with side-by-side diff
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* of `$final`. A value >= 0 corresponds to index of `$orig`.
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* Value < 0 indicates a blank row.
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* @type array $final_rows Associative array of interleaved rows of `$final` with
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* blanks to keep matches aligned with side-by-side diff
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* of `$orig`. A value >= 0 corresponds to index of `$final`.
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* Value < 0 indicates a blank row.
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* }
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*/
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public function interleave_changed_lines( $orig, $final ) {
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// Contains all pairwise string comparisons. Keys are such that this need only be a one dimensional array.
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$matches = array();
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foreach ( array_keys($orig) as $o ) {
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foreach ( array_keys($final) as $f ) {
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$matches["$o,$f"] = $this->compute_string_distance( $orig[$o], $final[$f] );
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}
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}
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asort($matches); // Order by string distance.
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$orig_matches = array();
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$final_matches = array();
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foreach ( $matches as $keys => $difference ) {
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list($o, $f) = explode(',', $keys);
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$o = (int) $o;
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$f = (int) $f;
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// Already have better matches for these guys
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if ( isset($orig_matches[$o]) && isset($final_matches[$f]) )
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continue;
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// First match for these guys. Must be best match
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if ( !isset($orig_matches[$o]) && !isset($final_matches[$f]) ) {
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$orig_matches[$o] = $f;
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$final_matches[$f] = $o;
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continue;
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}
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// Best match of this final is already taken? Must mean this final is a new row.
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if ( isset($orig_matches[$o]) )
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$final_matches[$f] = 'x';
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// Best match of this orig is already taken? Must mean this orig is a deleted row.
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elseif ( isset($final_matches[$f]) )
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$orig_matches[$o] = 'x';
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}
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// We read the text in this order
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ksort($orig_matches);
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ksort($final_matches);
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// Stores rows and blanks for each column.
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$orig_rows = $orig_rows_copy = array_keys($orig_matches);
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$final_rows = array_keys($final_matches);
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// Interleaves rows with blanks to keep matches aligned.
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// We may end up with some extraneous blank rows, but we'll just ignore them later.
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foreach ( $orig_rows_copy as $orig_row ) {
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$final_pos = array_search($orig_matches[$orig_row], $final_rows, true);
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$orig_pos = (int) array_search($orig_row, $orig_rows, true);
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if ( false === $final_pos ) { // This orig is paired with a blank final.
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array_splice( $final_rows, $orig_pos, 0, -1 );
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} elseif ( $final_pos < $orig_pos ) { // This orig's match is up a ways. Pad final with blank rows.
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$diff_pos = $final_pos - $orig_pos;
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while ( $diff_pos < 0 )
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array_splice( $final_rows, $orig_pos, 0, $diff_pos++ );
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} elseif ( $final_pos > $orig_pos ) { // This orig's match is down a ways. Pad orig with blank rows.
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$diff_pos = $orig_pos - $final_pos;
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while ( $diff_pos < 0 )
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array_splice( $orig_rows, $orig_pos, 0, $diff_pos++ );
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}
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}
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// Pad the ends with blank rows if the columns aren't the same length
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$diff_count = count($orig_rows) - count($final_rows);
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if ( $diff_count < 0 ) {
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while ( $diff_count < 0 )
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array_push($orig_rows, $diff_count++);
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} elseif ( $diff_count > 0 ) {
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$diff_count = -1 * $diff_count;
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while ( $diff_count < 0 )
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array_push($final_rows, $diff_count++);
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}
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return array($orig_matches, $final_matches, $orig_rows, $final_rows);
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}
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/**
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* Computes a number that is intended to reflect the "distance" between two strings.
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*
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* @since 2.6.0
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*
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* @param string $string1
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* @param string $string2
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* @return int
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*/
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public function compute_string_distance( $string1, $string2 ) {
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// Vectors containing character frequency for all chars in each string
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$chars1 = count_chars($string1);
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$chars2 = count_chars($string2);
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// L1-norm of difference vector.
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$difference = array_sum( array_map( array($this, 'difference'), $chars1, $chars2 ) );
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// $string1 has zero length? Odd. Give huge penalty by not dividing.
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if ( !$string1 )
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return $difference;
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// Return distance per character (of string1).
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return $difference / strlen($string1);
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}
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/**
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* @ignore
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* @since 2.6.0
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*
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* @param int $a
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* @param int $b
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* @return int
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*/
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public function difference( $a, $b ) {
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return abs( $a - $b );
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}
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/**
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* Make private properties readable for backward compatibility.
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*
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* @since 4.0.0
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*
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* @param string $name Property to get.
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* @return mixed Property.
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*/
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public function __get( $name ) {
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if ( in_array( $name, $this->compat_fields ) ) {
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return $this->$name;
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}
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}
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/**
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* Make private properties settable for backward compatibility.
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*
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* @since 4.0.0
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*
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* @param string $name Property to check if set.
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* @param mixed $value Property value.
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* @return mixed Newly-set property.
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*/
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public function __set( $name, $value ) {
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if ( in_array( $name, $this->compat_fields ) ) {
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return $this->$name = $value;
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}
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}
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/**
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* Make private properties checkable for backward compatibility.
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*
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* @since 4.0.0
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*
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* @param string $name Property to check if set.
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* @return bool Whether the property is set.
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*/
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public function __isset( $name ) {
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if ( in_array( $name, $this->compat_fields ) ) {
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return isset( $this->$name );
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}
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}
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/**
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* Make private properties un-settable for backward compatibility.
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*
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* @since 4.0.0
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*
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* @param string $name Property to unset.
|
|
*/
|
|
public function __unset( $name ) {
|
|
if ( in_array( $name, $this->compat_fields ) ) {
|
|
unset( $this->$name );
|
|
}
|
|
}
|
|
}
|