HordeTextDiff::__construct() - Code Metrics - Inspection of "namespaces" - XoopsModules25x/mylinks - Measure and Improve Code Quality continuously with Scrutinizer

Passed
Pull Request — master (#9)

by Michael
created 2020-04-16 16:25 UTC
HordeTextDiff::__construct() A

↳ Parent: HordeTextDiff
Complexity

Conditions	3
Paths	3
Size

Total Lines	12
Code Lines	7
Duplication

Lines	0
Ratio	0 %
Importance

Changes
Metric	Value
eloc	7
dl	0
loc	12
rs	10
c	0
b	0
f	0
cc	3
nc	3
nop	2
<?php

namespace XoopsModules\Mylinks;

/**
 * General API for generating and formatting diffs - the differences between
 * two sequences of strings.
 *
 * The original PHP version of this code was written by Geoffrey T. Dairiki
 * <[email protected]>, and is used/adapted with his permission.
 *
 * Copyright 2004 Geoffrey T. Dairiki <[email protected]>
 * Copyright 2004-2017 Horde LLC (http://www.horde.org/)
 *
 * See the enclosed file COPYING for license information (LGPL). If you did
 * not receive this file, see http://www.horde.org/licenses/lgpl21.
 *
 * @package Text_Diff
 * @author  Geoffrey T. Dairiki <[email protected]>
 */
class HordeTextDiff
{
    /**
     * Array of changes.
     *
     * @var array
     */
    protected $_edits;

    /**
     * Computes diffs between sequences of strings.
     *
     * @param string $engine     Name of the diffing engine to use.  'auto'
     *                           will automatically select the best.
     * @param array  $params     Parameters to pass to the diffing engine.
     *                           Normally an array of two arrays, each
     *                           containing the lines from a file.
     */
    public function __construct($engine, $params)
    {
        if ('auto' == $engine) {
            $engine = extension_loaded('xdiff') ? 'Xdiff' : 'Native';
        } else {
            $engine = Horde_String::ucfirst(basename($engine));
filter:
    dependency_paths: ["lib/*"]
        }

        $class       = 'HordeTextDiffEngine_' . $engine;
        $diff_engine = new $class();

        $this->_edits = call_user_func_array([$diff_engine, 'diff'], $params);
    }

    /**
     * Returns the array of differences.
     */
    public function getDiff()
    {
        return $this->_edits;
    }

    /**
     * returns the number of new (added) lines in a given diff.
     *
     * @return int The number of new lines
     */
    public function countAddedLines()
    {
        $count = 0;
        foreach ($this->_edits as $edit) {
            if ($edit instanceof HordeTextDiffOp_Add
filter:
    dependency_paths: ["lib/*"]
                || $edit instanceof HordeTextDiffOp_Change) {
filter:
    dependency_paths: ["lib/*"]
                $count += $edit->nfinal();
            }
        }

        return $count;
    }

    /**
     * Returns the number of deleted (removed) lines in a given diff.
     *
     * @return int The number of deleted lines
     */
    public function countDeletedLines()
    {
        $count = 0;
        foreach ($this->_edits as $edit) {
            if ($edit instanceof HordeTextDiffOp_Delete
filter:
    dependency_paths: ["lib/*"]
                || $edit instanceof HordeTextDiffOp_Change) {
                $count += $edit->norig();
            }
        }

        return $count;
    }

    /**
     * Computes a reversed diff.
     *
     * Example:
     * <code>
     * $diff = new Horde_Text_Diff($lines1, $lines2);
     * $rev = $diff->reverse();
     * </code>
     *
     * @return \XoopsModules\Mylinks\HordeTextDiff A Diff object representing the inverse of the
     *                    original diff.  Note that we purposely don't return a
     *                    reference here, since this essentially is a clone()
     *                    method.
     */
    public function reverse()
    {
        if (version_compare(zend_version(), '2', '>')) {
            $rev = clone $this;
        } else {
            $rev = $this;
        }
        $rev->_edits = [];
        foreach ($this->_edits as $edit) {
            $rev->_edits[] = $edit->reverse();
        }

        return $rev;
    }

    /**
     * Checks for an empty diff.
     *
     * @return bool  True if two sequences were identical.
     */
    public function isEmpty()
    {
        foreach ($this->_edits as $edit) {
            if (!($edit instanceof HordeTextDiffOp_Copy)) {
filter:
    dependency_paths: ["lib/*"]
                return false;
            }
        }

        return true;
    }

    /**
     * Computes the length of the Longest Common Subsequence (LCS).
     *
     * This is mostly for diagnostic purposes.
     *
     * @return int  The length of the LCS.
     */
    public function lcs()
    {
        $lcs = 0;
        foreach ($this->_edits as $edit) {
            if ($edit instanceof HordeTextDiffOp_Copy) {
                $lcs += count($edit->orig);
            }
        }

        return $lcs;
    }

    /**
     * Gets the original set of lines.
     *
     * This reconstructs the $from_lines parameter passed to the constructor.
     *
     * @return array  The original sequence of strings.
     */
    public function getOriginal()
    {
        $lines = [];
        foreach ($this->_edits as $edit) {
            if ($edit->orig) {
                array_splice($lines, count($lines), 0, $edit->orig);
            }
        }

        return $lines;
    }

    /**
     * Gets the final set of lines.
     *
     * This reconstructs the $to_lines parameter passed to the constructor.
     *
     * @return array  The sequence of strings.
     */
    public function getFinal()
    {
        $lines = [];
        foreach ($this->_edits as $edit) {
            if ($edit->final) {
                array_splice($lines, count($lines), 0, $edit->final);
            }
        }

        return $lines;
    }

    /**
     * Removes trailing newlines from a line of text. This is meant to be used
     * with array_walk().
     *
     * @param string $line The line to trim.
     * @param int    $key  The index of the line in the array. Not used.
     */
    public static function trimNewlines(&$line, $key)
    public static function trimNewlines(&$line, /** @scrutinizer ignore-unused */ $key)
    {
        $line = str_replace(["\n", "\r"], '', $line);
    }

    /**
     * Checks a diff for validity.
     *
     * This is here only for debugging purposes.
     * @param $from_lines
     * @param $to_lines
     * @return bool
     */
    protected function _check($from_lines, $to_lines)
    {
        if (serialize($from_lines) != serialize($this->getOriginal())) {
            trigger_error("Reconstructed original doesn't match", E_USER_ERROR);
        }
        if (serialize($to_lines) != serialize($this->getFinal())) {
            trigger_error("Reconstructed final doesn't match", E_USER_ERROR);
        }

        $rev = $this->reverse();
        if (serialize($to_lines) != serialize($rev->getOriginal())) {
            trigger_error("Reversed original doesn't match", E_USER_ERROR);
        }
        if (serialize($from_lines) != serialize($rev->getFinal())) {
            trigger_error("Reversed final doesn't match", E_USER_ERROR);
        }

        $prevtype = null;
        foreach ($this->_edits as $edit) {
            if ($prevtype == get_class($edit)) {
                trigger_error('Edit sequence is non-optimal', E_USER_ERROR);
            }
            $prevtype = get_class($edit);
        }

        return true;
    }
}

XoopsModules25x / mylinks

Pull Request — master (#9)

HordeTextDiff::__construct() A

Complexity

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