Diff Class Reference

Inheritance diagram for Diff:

Collaboration diagram for Diff:

Public Member Functions
	__construct ($from_lines, $to_lines)
	Constructor. More...
	reverse ()
	Compute reversed Diff. More...
	isEmpty ()
	Check for empty diff. More...
	lcs ()
	Compute the length of the Longest Common Subsequence (LCS). More...
	orig ()
	Get the original set of lines. More...
	closing ()
	Get the closing set of lines. More...
	_check ($from_lines, $to_lines)
	Check a Diff for validity. More...

Data Fields
	$edits

Detailed Description

Definition at line 1188 of file class.WordLevelDiff.php.

Constructor & Destructor Documentation

__construct()

Diff::__construct	(		$from_lines,
			$to_lines
	)

Constructor.

Computes diff between sequences of strings.

Parameters

$from_lines	array An array of strings. (Typically these are lines from a file.)
$to_lines	array An array of strings.

Definition at line 1200 of file class.WordLevelDiff.php.

{
        var $edits;

Member Function Documentation

_check()

Diff::_check	(		$from_lines,
			$to_lines
	)

Check a Diff for validity.

This is here only for debugging purposes.

Definition at line 1295 of file class.WordLevelDiff.php.

                                                {
                        if ($edit->closing)
                                array_splice($lines, sizeof($lines), 0, $edit->closing);
                }
                return $lines;
        }

        function _check ($from_lines, $to_lines) {
                $fname = 'Diff::_check';
                //wfProfileIn( $fname );
                if (serialize($from_lines) != serialize($this->orig()))
                        trigger_error("Reconstructed original doesn't match", E_USER_ERROR);
                if (serialize($to_lines) != serialize($this->closing()))
                        trigger_error("Reconstructed closing doesn't match", E_USER_ERROR);

                $rev = $this->reverse();
                if (serialize($to_lines) != serialize($rev->orig()))
                        trigger_error("Reversed original doesn't match", E_USER_ERROR);
                if (serialize($from_lines) != serialize($rev->closing()))

closing()

Diff::closing

(

)

Get the closing set of lines.

This reconstructs the $to_lines parameter passed to the constructor.

Returns

array The sequence of strings.

Definition at line 1280 of file class.WordLevelDiff.php.

                           {

isEmpty()

Diff::isEmpty

(

)

Check for empty diff.

Returns

bool True iff two sequences were identical.

Definition at line 1230 of file class.WordLevelDiff.php.

References array.

                            {
                $rev = $this;
                $rev->edits = array();
                foreach ($this->edits as $edit) {
                        $rev->edits[] = $edit->reverse();
                }
                return $rev;

lcs()

Diff::lcs

(

)

Compute the length of the Longest Common Subsequence (LCS).

This is mostly for diagnostic purposed.

Returns

int The length of the LCS.

Definition at line 1245 of file class.WordLevelDiff.php.

                                                {
                        if ($edit->type != 'copy')
                                return false;
                }
                return true;
        }

orig()

Diff::orig

(

)

Get the original set of lines.

This reconstructs the $from_lines parameter passed to the constructor.

Returns

array The original sequence of strings.

Definition at line 1262 of file class.WordLevelDiff.php.

References array.

                        {

reverse()

Diff::reverse

(

)

Compute reversed Diff.

SYNOPSIS:

 $diff = new Diff($lines1, $lines2);
 $rev = $diff->reverse();

Returns

object A Diff object representing the inverse of the original diff.

Definition at line 1216 of file class.WordLevelDiff.php.

                            {

Field Documentation

$edits

Diff::$edits

Definition at line 1190 of file class.WordLevelDiff.php.

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The documentation for this class was generated from the following file:

• Services/COPage/mediawikidiff/class.WordLevelDiff.php