DiffFormatter Class Reference

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 834 of file class.WordLevelDiff.php.

Member Function Documentation

_added()

DiffFormatter::_added

(

$lines

)

Definition at line 996 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 929 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
	)

Definition at line 963 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
	)

Definition at line 1005 of file class.WordLevelDiff.php.

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

References _added(), and _deleted().

Referenced by _block().

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_context()

DiffFormatter::_context

(

$lines

)

Definition at line 991 of file class.WordLevelDiff.php.

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

References _lines().

Referenced by _block().

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_deleted()

DiffFormatter::_deleted

(

$lines

)

Definition at line 1000 of file class.WordLevelDiff.php.

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

References _lines().

Referenced by _block(), and _changed().

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_end_block()

DiffFormatter::_end_block

(

)

Definition at line 980 of file class.WordLevelDiff.php.

    {
    }

Referenced by _block().

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_end_diff()

DiffFormatter::_end_diff

(

)

Definition at line 956 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 984 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

)

Definition at line 975 of file class.WordLevelDiff.php.

    {
        echo $header;
    }

Referenced by _block().

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_start_diff()

DiffFormatter::_start_diff

(

)

Definition at line 951 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 858 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 $context, $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 842 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 850 of file class.WordLevelDiff.php.

Referenced by format().

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

• components/ILIAS/COPage/mediawikidiff/class.WordLevelDiff.php