File: /var/www/design.system/node_modules/@microsoft/tsdoc/lib/parser/TextRange.js.map
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All rights reserved. Licensed under the MIT license.\r\n// See LICENSE in the project root for license information.\r\n\r\n/**\r\n * Text coordinates represented as a line number and column number.\r\n *\r\n * @remarks\r\n * The first character in a file is considered to be in column 1 of line 1.\r\n * The location with column 0 and line 0 is used to represent an empty, unspecified,\r\n * or unknown location.\r\n */\r\nexport interface ITextLocation {\r\n line: number;\r\n column: number;\r\n}\r\n\r\n/**\r\n * Efficiently references a range of text from a string buffer.\r\n */\r\nexport class TextRange {\r\n /**\r\n * Used to represent an empty or unknown range.\r\n */\r\n public static readonly empty: TextRange = new TextRange('', 0, 0);\r\n\r\n /**\r\n * The starting index into the associated text buffer.\r\n *\r\n * @remarks\r\n * The text range corresponds to the `range.buffer.substring(range.pos, range.end)`.\r\n */\r\n public readonly pos: number;\r\n\r\n /**\r\n * The (non-inclusive) ending index for the associated text buffer.\r\n *\r\n * @remarks\r\n * The text range corresponds to the `range.buffer.substring(range.pos, range.end)`.\r\n */\r\n public readonly end: number;\r\n\r\n /**\r\n * The string buffer that the `pos` and `end` indexes refer to.\r\n */\r\n public readonly buffer: string;\r\n\r\n private constructor(buffer: string, pos: number, end: number) {\r\n this.buffer = buffer;\r\n this.pos = pos;\r\n this.end = end;\r\n this._validateBounds();\r\n }\r\n\r\n /**\r\n * Constructs a TextRange that corresponds to an entire string object.\r\n */\r\n public static fromString(buffer: string): TextRange {\r\n return new TextRange(buffer, 0, buffer.length);\r\n }\r\n\r\n /**\r\n * Constructs a TextRange that corresponds to an entire string object.\r\n */\r\n public static fromStringRange(buffer: string, pos: number, end: number): TextRange {\r\n return new TextRange(buffer, pos, end);\r\n }\r\n\r\n /**\r\n * Returns the length of the text range.\r\n * @remarks\r\n * This value is calculated as the `end` property minus the `pos` property.\r\n */\r\n public get length(): number {\r\n return this.end - this.pos;\r\n }\r\n\r\n /**\r\n * Constructs a TextRange that corresponds to a different range of an existing buffer.\r\n */\r\n public getNewRange(pos: number, end: number): TextRange {\r\n return new TextRange(this.buffer, pos, end);\r\n }\r\n\r\n /**\r\n * Returns true if the length of the range is zero. Note that the object reference may not\r\n * be equal to `TextRange.empty`, and the buffer may be different.\r\n */\r\n public isEmpty(): boolean {\r\n return this.pos === this.end;\r\n }\r\n\r\n /**\r\n * Returns the range from the associated string buffer.\r\n */\r\n public toString(): string {\r\n return this.buffer.substring(this.pos, this.end);\r\n }\r\n\r\n /**\r\n * Returns a debugging dump of the range, indicated via custom delimiters.\r\n * @remarks\r\n * For example if the delimiters are \"[\" and \"]\", and the range is 3..5 inside \"1234567\",\r\n * then the output would be \"12[345]67\".\r\n */\r\n public getDebugDump(posDelimiter: string, endDelimiter: string): string {\r\n return (\r\n this.buffer.substring(0, this.pos) +\r\n posDelimiter +\r\n this.buffer.substring(this.pos, this.end) +\r\n endDelimiter +\r\n this.buffer.substring(this.end)\r\n );\r\n }\r\n\r\n /**\r\n * Calculates the line and column number for the specified offset into the buffer.\r\n *\r\n * @remarks\r\n * This is a potentially expensive operation.\r\n *\r\n * @param index - an integer offset\r\n * @param buffer - the buffer\r\n */\r\n public getLocation(index: number): ITextLocation {\r\n if (index < 0 || index > this.buffer.length) {\r\n // No match\r\n return { line: 0, column: 0 };\r\n }\r\n\r\n // TODO: Consider caching or optimizing this somehow\r\n let line: number = 1;\r\n let column: number = 1;\r\n\r\n let currentIndex: number = 0;\r\n\r\n while (currentIndex < index) {\r\n const current: string = this.buffer[currentIndex];\r\n ++currentIndex;\r\n\r\n if (current === '\\r') {\r\n // CR\r\n // Ignore '\\r' and assume it will always have an accompanying '\\n'\r\n continue;\r\n }\r\n\r\n if (current === '\\n') {\r\n // LF\r\n ++line;\r\n column = 1;\r\n } else {\r\n // NOTE: For consistency with the TypeScript compiler, a tab character is assumed\r\n // to advance by one column\r\n ++column;\r\n }\r\n }\r\n\r\n return { line, column };\r\n }\r\n\r\n private _validateBounds(): void {\r\n if (this.pos < 0) {\r\n throw new Error('TextRange.pos cannot be negative');\r\n }\r\n if (this.end < 0) {\r\n throw new Error('TextRange.end cannot be negative');\r\n }\r\n if (this.end < this.pos) {\r\n throw new Error('TextRange.end cannot be smaller than TextRange.pos');\r\n }\r\n if (this.pos > this.buffer.length) {\r\n throw new Error('TextRange.pos cannot exceed the associated text buffer length');\r\n }\r\n if (this.end > this.buffer.length) {\r\n throw new Error('TextRange.end cannot exceed the associated text buffer length');\r\n }\r\n }\r\n}\r\n"]}