ArcanistDiffHunk.php
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	<?php

	/*
	* Copyright 2011 Facebook, Inc.
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

	/**
	* Represents a contiguous set of added and removed lines in a diff.
	*
	* @group diff
	*/
	class ArcanistDiffHunk {

	protected $oldOffset;
	protected $oldLength;
	protected $newOffset;
	protected $newLength;
	protected $addLines;
	protected $delLines;
	protected $isMissingOldNewline = false;
	protected $isMissingNewNewline = false;
	protected $corpus;

	public function toDictionary() {
	return array(
	'oldOffset' => $this->oldOffset,
	'newOffset' => $this->newOffset,
	'oldLength' => $this->oldLength,
	'newLength' => $this->newLength,
	'addLines' => $this->addLines,
	'delLines' => $this->delLines,
	'isMissingOldNewline' => $this->isMissingOldNewline,
	'isMissingNewNewline' => $this->isMissingNewNewline,
	'corpus' => (string)$this->corpus,
	);
	}

	public static function newFromDictionary(array $dict) {
	$obj = new ArcanistDiffHunk();

	$obj->oldOffset = $dict['oldOffset'];
	$obj->newOffset = $dict['newOffset'];
	$obj->oldLength = $dict['oldLength'];
	$obj->newLength = $dict['newLength'];
	$obj->addLines = $dict['addLines'];
	$obj->delLines = $dict['delLines'];
	$obj->isMissingOldNewline = $dict['isMissingOldNewline'];
	$obj->isMissingNewNewline = $dict['isMissingNewNewline'];
	$obj->corpus = $dict['corpus'];

	return $obj;
	}

	public function getChangedLines($type) {
	$old_map = array();
	$new_map = array();
	$cover_map = array();

	$oline = $this->getOldOffset();
	$nline = $this->getNewOffset();
	foreach (explode("\n", $this->getCorpus()) as $line) {
	$char = strlen($line) ? $line[0] : '~';
	switch ($char) {
	case '-':
	$old_map[$oline] = true;
	$cover_map[$oline] = true;
	++$oline;
	break;
	case '+':
	$new_map[$nline] = true;
	if ($oline > 1) {
	$cover_map[$oline - 1] = true;
	}
	$cover_map[$oline] = true;
	++$nline;
	break;
	default:
	++$oline;
	++$nline;
	break;
	}
	}

	switch ($type) {
	case 'new':
	return $new_map;
	case 'old':
	return $old_map;
	case 'cover':
	return $cover_map;
	default:
	throw new Exception("Unknown line change type '{$type}'.");
	}
	}

	public function setOldOffset($old_offset) {
	$this->oldOffset = $old_offset;
	return $this;
	}

	public function getOldOffset() {
	return $this->oldOffset;
	}

	public function setNewOffset($new_offset) {
	$this->newOffset = $new_offset;
	return $this;
	}

	public function getNewOffset() {
	return $this->newOffset;
	}

	public function setOldLength($old_length) {
	$this->oldLength = $old_length;
	return $this;
	}

	public function getOldLength() {
	return $this->oldLength;
	}

	public function setNewLength($new_length) {
	$this->newLength = $new_length;
	return $this;
	}

	public function getNewLength() {
	return $this->newLength;
	}

	public function setAddLines($add_lines) {
	$this->addLines = $add_lines;
	return $this;
	}

	public function getAddLines() {
	return $this->addLines;
	}

	public function setDelLines($del_lines) {
	$this->delLines = $del_lines;
	return $this;
	}

	public function getDelLines() {
	return $this->delLines;
	}

	public function setCorpus($corpus) {
	$this->corpus = $corpus;
	return $this;
	}

	public function getCorpus() {
	return $this->corpus;
	}

	public function setIsMissingOldNewline($missing) {
	$this->isMissingOldNewline = (bool)$missing;
	return $this;
	}

	public function getIsMissingOldNewline() {
	return $this->isMissingOldNewline;
	}

	public function setIsMissingNewNewline($missing) {
	$this->isMissingNewNewline = (bool)$missing;
	return $this;
	}

	public function getIsMissingNewNewline() {
	return $this->isMissingNewNewline;
	}

	}

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