You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.

128 lines
3.8KB

  1. <?php
  2. /**
  3. * Context diff generator for PHP DiffLib.
  4. *
  5. * PHP version 5
  6. *
  7. * Copyright (c) 2009 Chris Boulton <chris.boulton@interspire.com>
  8. *
  9. * All rights reserved.
  10. *
  11. * Redistribution and use in source and binary forms, with or without
  12. * modification, are permitted provided that the following conditions are met:
  13. *
  14. * - Redistributions of source code must retain the above copyright notice,
  15. * this list of conditions and the following disclaimer.
  16. * - Redistributions in binary form must reproduce the above copyright notice,
  17. * this list of conditions and the following disclaimer in the documentation
  18. * and/or other materials provided with the distribution.
  19. * - Neither the name of the Chris Boulton nor the names of its contributors
  20. * may be used to endorse or promote products derived from this software
  21. * without specific prior written permission.
  22. *
  23. * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  24. * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25. * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26. * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  27. * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  28. * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  29. * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  30. * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  31. * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  32. * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  33. * POSSIBILITY OF SUCH DAMAGE.
  34. *
  35. * @package DiffLib
  36. * @author Chris Boulton <chris.boulton@interspire.com>
  37. * @copyright (c) 2009 Chris Boulton
  38. * @license New BSD License http://www.opensource.org/licenses/bsd-license.php
  39. * @version 1.1
  40. * @link http://github.com/chrisboulton/php-diff
  41. */
  42. require_once dirname(__FILE__).'/../Abstract.php';
  43. class Diff_Renderer_Text_Context extends Diff_Renderer_Abstract
  44. {
  45. /**
  46. * @var array Array of the different opcode tags and how they map to the context diff equivalent.
  47. */
  48. private $tagMap = array(
  49. 'insert' => '+',
  50. 'delete' => '-',
  51. 'replace' => '!',
  52. 'equal' => ' '
  53. );
  54. /**
  55. * Render and return a context formatted (old school!) diff file.
  56. *
  57. * @return string The generated context diff.
  58. */
  59. public function render()
  60. {
  61. $diff = '';
  62. $opCodes = $this->diff->getGroupedOpcodes();
  63. foreach($opCodes as $group) {
  64. $diff .= "***************\n";
  65. $lastItem = count($group)-1;
  66. $i1 = $group[0][1];
  67. $i2 = $group[$lastItem][2];
  68. $j1 = $group[0][3];
  69. $j2 = $group[$lastItem][4];
  70. if($i2 - $i1 >= 2) {
  71. $diff .= '*** '.($group[0][1] + 1).','.$i2." ****".PHP_EOL;
  72. }
  73. else {
  74. $diff .= '*** '.$i2." ****\n";
  75. }
  76. if($j2 - $j1 >= 2) {
  77. $separator = '--- '.($j1 + 1).','.$j2." ----".PHP_EOL;
  78. }
  79. else {
  80. $separator = '--- '.$j2." ----".PHP_EOL;
  81. }
  82. $hasVisible = false;
  83. foreach($group as $code) {
  84. if($code[0] == 'replace' || $code[0] == 'delete') {
  85. $hasVisible = true;
  86. break;
  87. }
  88. }
  89. if($hasVisible) {
  90. foreach($group as $code) {
  91. list($tag, $i1, $i2, $j1, $j2) = $code;
  92. if($tag == 'insert') {
  93. continue;
  94. }
  95. $diff .= $this->tagMap[$tag].' '.implode(PHP_EOL.$this->tagMap[$tag].' ', $this->diff->GetA($i1, $i2)).PHP_EOL;
  96. }
  97. }
  98. $hasVisible = false;
  99. foreach($group as $code) {
  100. if($code[0] == 'replace' || $code[0] == 'insert') {
  101. $hasVisible = true;
  102. break;
  103. }
  104. }
  105. $diff .= $separator;
  106. if($hasVisible) {
  107. foreach($group as $code) {
  108. list($tag, $i1, $i2, $j1, $j2) = $code;
  109. if($tag == 'delete') {
  110. continue;
  111. }
  112. $diff .= $this->tagMap[$tag].' '.implode(PHP_EOL.$this->tagMap[$tag].' ', $this->diff->GetB($j1, $j2)).PHP_EOL;
  113. }
  114. }
  115. }
  116. return $diff;
  117. }
  118. }