DiffFormatter Class Reference

Inheritance diagram for DiffFormatter:

Collaboration diagram for DiffFormatter:

Public Member Functions
	format ($diff)
	Format a diff. More...
	_block ($xbeg, $xlen, $ybeg, $ylen, &$edits)
	_start_diff ()
	_end_diff ()
	_block_header ($xbeg, $xlen, $ybeg, $ylen)
	_start_block ($header)
	_end_block ()
	_lines ($lines, $prefix=' ')
	_context ($lines)
	_added ($lines)
	_deleted ($lines)
	_changed ($orig, $closing)

Data Fields
	$leading_context_lines = 0
	Number of leading context "lines" to preserve. More...
	$trailing_context_lines = 0
	Number of trailing context "lines" to preserve. More...

Detailed Description

Definition at line 1523 of file class.WordLevelDiff.php.

Member Function Documentation

_added()

DiffFormatter::_added

(

$lines

)

Reimplemented in TableDiffFormatter.

Definition at line 1685 of file class.WordLevelDiff.php.

    {
        $this->_lines($lines, '>');
    }

References _lines().

Referenced by _block(), and _changed().

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_block()

DiffFormatter::_block	(		$xbeg,
			$xlen,
			$ybeg,
			$ylen,
		&	$edits
	)

Definition at line 1618 of file class.WordLevelDiff.php.

    {
        $fname = 'DiffFormatter::_block';
        //wfProfileIn( $fname );
        $this->_start_block($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( $fname );
    }

References _added(), _block_header(), _changed(), _context(), _deleted(), _end_block(), and _start_block().

Referenced by format().

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_block_header()

DiffFormatter::_block_header	(		$xbeg,
			$xlen,
			$ybeg,
			$ylen
	)

Reimplemented in TableDiffFormatter.

Definition at line 1652 of file class.WordLevelDiff.php.

    {
        if ($xlen > 1) {
            $xbeg .= "," . ($xbeg + $xlen - 1);
        }
        if ($ylen > 1) {
            $ybeg .= "," . ($ybeg + $ylen - 1);
        }
 
        return $xbeg . ($xlen ? ($ylen ? 'c' : 'd') : 'a') . $ybeg;
    }

Referenced by _block().

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_changed()

DiffFormatter::_changed	(		$orig,
			$closing
	)

Reimplemented in TableDiffFormatter.

Definition at line 1694 of file class.WordLevelDiff.php.

    {
        $this->_deleted($orig);
        echo "---\n";
        $this->_added($closing);
    }

References $orig, _added(), and _deleted().

Referenced by _block().

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_context()

DiffFormatter::_context

(

$lines

)

Reimplemented in TableDiffFormatter.

Definition at line 1680 of file class.WordLevelDiff.php.

    {
        $this->_lines($lines);
    }

References _lines().

Referenced by _block().

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_deleted()

DiffFormatter::_deleted

(

$lines

)

Reimplemented in TableDiffFormatter.

Definition at line 1689 of file class.WordLevelDiff.php.

    {
        $this->_lines($lines, '<');
    }

References _lines().

Referenced by _block(), and _changed().

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_end_block()

DiffFormatter::_end_block

(

)

Reimplemented in TableDiffFormatter.

Definition at line 1669 of file class.WordLevelDiff.php.

    {
    }

Referenced by _block().

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_end_diff()

DiffFormatter::_end_diff

(

)

Definition at line 1645 of file class.WordLevelDiff.php.

    {
        $val = ob_get_contents();
        ob_end_clean();
        return $val;
    }

Referenced by format().

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_lines()

DiffFormatter::_lines	(		$lines,
			$prefix = ' '
	)

Definition at line 1673 of file class.WordLevelDiff.php.

    {
        foreach ($lines as $line) {
            echo "$prefix $line\n";
        }
    }

Referenced by _added(), _context(), and _deleted().

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_start_block()

DiffFormatter::_start_block

(

$header

)

Reimplemented in TableDiffFormatter.

Definition at line 1664 of file class.WordLevelDiff.php.

    {
        echo $header;
    }

References $header.

Referenced by _block().

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_start_diff()

DiffFormatter::_start_diff

(

)

Definition at line 1640 of file class.WordLevelDiff.php.

    {
        ob_start();
    }

Referenced by format().

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format()

DiffFormatter::format

(

$diff

)

Format a diff.

Parameters

$diff

object A Diff object.

Returns

string The formatted output.

Definition at line 1547 of file class.WordLevelDiff.php.

    {
        $fname = 'DiffFormatter::format';
        //wfProfileIn( $fname );
 
        $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($block)) {
                    if (sizeof($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, sizeof($context) - $nlead);
                    $x0 = $xi - sizeof($context);
                    $y0 = $yi - sizeof($context);
                    $block = array();
                    if ($context) {
                        $block[] = new _DiffOp_Copy($context);
                    }
                }
                $block[] = $edit;
            }
 
            if ($edit->orig) {
                $xi += sizeof($edit->orig);
            }
            if ($edit->closing) {
                $yi += sizeof($edit->closing);
            }
        }
 
        if (is_array($block)) {
            $this->_block(
                $x0,
                $xi - $x0,
                $y0,
                $yi - $y0,
                $block
            );
        }
 
        $end = $this->_end_diff();
        //wfProfileOut( $fname );
        return $end;
    }

References $end, $leading_context_lines, $trailing_context_lines, _block(), _end_diff(), and _start_diff().

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Field Documentation

$leading_context_lines

DiffFormatter::$leading_context_lines = 0

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.

Definition at line 1531 of file class.WordLevelDiff.php.

Referenced by format().

$trailing_context_lines

DiffFormatter::$trailing_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.

Definition at line 1539 of file class.WordLevelDiff.php.

Referenced by format().

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

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