change.js 15 KB

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  1. "use strict";
  2. /**
  3. * @license
  4. * Copyright Google LLC All Rights Reserved.
  5. *
  6. * Use of this source code is governed by an MIT-style license that can be
  7. * found in the LICENSE file at https://angular.io/license
  8. */
  9. Object.defineProperty(exports, "__esModule", { value: true });
  10. exports.applyToUpdateRecorder = exports.ReplaceChange = exports.RemoveChange = exports.InsertChange = exports.NoopChange = void 0;
  11. /**
  12. * An operation that does nothing.
  13. */
  14. class NoopChange {
  15. constructor() {
  16. this.description = 'No operation.';
  17. this.order = Infinity;
  18. this.path = null;
  19. }
  20. apply() {
  21. return Promise.resolve();
  22. }
  23. }
  24. exports.NoopChange = NoopChange;
  25. /**
  26. * Will add text to the source code.
  27. */
  28. class InsertChange {
  29. constructor(path, pos, toAdd) {
  30. this.path = path;
  31. this.pos = pos;
  32. this.toAdd = toAdd;
  33. if (pos < 0) {
  34. throw new Error('Negative positions are invalid');
  35. }
  36. this.description = `Inserted ${toAdd} into position ${pos} of ${path}`;
  37. this.order = pos;
  38. }
  39. /**
  40. * This method does not insert spaces if there is none in the original string.
  41. */
  42. apply(host) {
  43. return host.read(this.path).then((content) => {
  44. const prefix = content.substring(0, this.pos);
  45. const suffix = content.substring(this.pos);
  46. return host.write(this.path, `${prefix}${this.toAdd}${suffix}`);
  47. });
  48. }
  49. }
  50. exports.InsertChange = InsertChange;
  51. /**
  52. * Will remove text from the source code.
  53. */
  54. class RemoveChange {
  55. constructor(path, pos, toRemove) {
  56. this.path = path;
  57. this.pos = pos;
  58. this.toRemove = toRemove;
  59. if (pos < 0) {
  60. throw new Error('Negative positions are invalid');
  61. }
  62. this.description = `Removed ${toRemove} into position ${pos} of ${path}`;
  63. this.order = pos;
  64. }
  65. apply(host) {
  66. return host.read(this.path).then((content) => {
  67. const prefix = content.substring(0, this.pos);
  68. const suffix = content.substring(this.pos + this.toRemove.length);
  69. // TODO: throw error if toRemove doesn't match removed string.
  70. return host.write(this.path, `${prefix}${suffix}`);
  71. });
  72. }
  73. }
  74. exports.RemoveChange = RemoveChange;
  75. /**
  76. * Will replace text from the source code.
  77. */
  78. class ReplaceChange {
  79. constructor(path, pos, oldText, newText) {
  80. this.path = path;
  81. this.pos = pos;
  82. this.oldText = oldText;
  83. this.newText = newText;
  84. if (pos < 0) {
  85. throw new Error('Negative positions are invalid');
  86. }
  87. this.description = `Replaced ${oldText} into position ${pos} of ${path} with ${newText}`;
  88. this.order = pos;
  89. }
  90. apply(host) {
  91. return host.read(this.path).then((content) => {
  92. const prefix = content.substring(0, this.pos);
  93. const suffix = content.substring(this.pos + this.oldText.length);
  94. const text = content.substring(this.pos, this.pos + this.oldText.length);
  95. if (text !== this.oldText) {
  96. return Promise.reject(new Error(`Invalid replace: "${text}" != "${this.oldText}".`));
  97. }
  98. // TODO: throw error if oldText doesn't match removed string.
  99. return host.write(this.path, `${prefix}${this.newText}${suffix}`);
  100. });
  101. }
  102. }
  103. exports.ReplaceChange = ReplaceChange;
  104. function applyToUpdateRecorder(recorder, changes) {
  105. for (const change of changes) {
  106. if (change instanceof InsertChange) {
  107. recorder.insertLeft(change.pos, change.toAdd);
  108. }
  109. else if (change instanceof RemoveChange) {
  110. recorder.remove(change.order, change.toRemove.length);
  111. }
  112. else if (change instanceof ReplaceChange) {
  113. recorder.remove(change.order, change.oldText.length);
  114. recorder.insertLeft(change.order, change.newText);
  115. }
  116. else if (!(change instanceof NoopChange)) {
  117. throw new Error('Unknown Change type encountered when updating a recorder.');
  118. }
  119. }
  120. }
  121. exports.applyToUpdateRecorder = applyToUpdateRecorder;
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Some changes might not apply to\n  // a file (maybe the config).\n  readonly path: string | null;\n\n  // The order this change should be applied. Normally the position inside the file.\n  // Changes are applied from the bottom of a file to the top.\n  readonly order: number;\n\n  // The description of this change. This will be outputted in a dry or verbose run.\n  readonly description: string;\n}\n\n/**\n * An operation that does nothing.\n */\nexport class NoopChange implements Change {\n  description = 'No operation.';\n  order = Infinity;\n  path = null;\n  apply() {\n    return Promise.resolve();\n  }\n}\n\n/**\n * Will add text to the source code.\n */\nexport class InsertChange implements Change {\n  order: number;\n  description: string;\n\n  constructor(public path: string, public pos: number, public toAdd: string) {\n    if (pos < 0) {\n      throw new Error('Negative positions are invalid');\n    }\n    this.description = `Inserted ${toAdd} into position ${pos} of ${path}`;\n    this.order = pos;\n  }\n\n  /**\n   * This method does not insert spaces if there is none in the original string.\n   */\n  apply(host: Host) {\n    return host.read(this.path).then((content) => {\n      const prefix = content.substring(0, this.pos);\n      const suffix = content.substring(this.pos);\n\n      return host.write(this.path, `${prefix}${this.toAdd}${suffix}`);\n    });\n  }\n}\n\n/**\n * Will remove text from the source code.\n */\nexport class RemoveChange implements Change {\n  order: number;\n  description: string;\n\n  constructor(public path: string, private pos: number, public toRemove: string) {\n    if (pos < 0) {\n      throw new Error('Negative positions are invalid');\n    }\n    this.description = `Removed ${toRemove} into position ${pos} of ${path}`;\n    this.order = pos;\n  }\n\n  apply(host: Host): Promise<void> {\n    return host.read(this.path).then((content) => {\n      const prefix = content.substring(0, this.pos);\n      const suffix = content.substring(this.pos + this.toRemove.length);\n\n      // TODO: throw error if toRemove doesn't match removed string.\n      return host.write(this.path, `${prefix}${suffix}`);\n    });\n  }\n}\n\n/**\n * Will replace text from the source code.\n */\nexport class ReplaceChange implements Change {\n  order: number;\n  description: string;\n\n  constructor(\n    public path: string,\n    private pos: number,\n    public oldText: string,\n    public newText: string,\n  ) {\n    if (pos < 0) {\n      throw new Error('Negative positions are invalid');\n    }\n    this.description = `Replaced ${oldText} into position ${pos} of ${path} with ${newText}`;\n    this.order = pos;\n  }\n\n  apply(host: Host): Promise<void> {\n    return host.read(this.path).then((content) => {\n      const prefix = content.substring(0, this.pos);\n      const suffix = content.substring(this.pos + this.oldText.length);\n      const text = content.substring(this.pos, this.pos + this.oldText.length);\n\n      if (text !== this.oldText) {\n        return Promise.reject(new Error(`Invalid replace: \"${text}\" != \"${this.oldText}\".`));\n      }\n\n      // TODO: throw error if oldText doesn't match removed string.\n      return host.write(this.path, `${prefix}${this.newText}${suffix}`);\n    });\n  }\n}\n\nexport function applyToUpdateRecorder(recorder: UpdateRecorder, changes: Change[]): void {\n  for (const change of changes) {\n    if (change instanceof InsertChange) {\n      recorder.insertLeft(change.pos, change.toAdd);\n    } else if (change instanceof RemoveChange) {\n      recorder.remove(change.order, change.toRemove.length);\n    } else if (change instanceof ReplaceChange) {\n      recorder.remove(change.order, change.oldText.length);\n      recorder.insertLeft(change.order, change.newText);\n    } else if (!(change instanceof NoopChange)) {\n      throw new Error('Unknown Change type encountered when updating a recorder.');\n    }\n  }\n}\n"]}