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667 lines
25 KiB
667 lines
25 KiB
4 years ago
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"use strict";
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var __assign = (this && this.__assign) || function () {
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__assign = Object.assign || function(t) {
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for (var s, i = 1, n = arguments.length; i < n; i++) {
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s = arguments[i];
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for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))
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t[p] = s[p];
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}
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return t;
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};
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return __assign.apply(this, arguments);
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};
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var __importDefault = (this && this.__importDefault) || function (mod) {
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return (mod && mod.__esModule) ? mod : { "default": mod };
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};
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Object.defineProperty(exports, "__esModule", { value: true });
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var assert_1 = __importDefault(require("assert"));
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var source_map_1 = __importDefault(require("source-map"));
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var options_1 = require("./options");
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var util_1 = require("./util");
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var mapping_1 = __importDefault(require("./mapping"));
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var Lines = /** @class */ (function () {
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function Lines(infos, sourceFileName) {
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if (sourceFileName === void 0) { sourceFileName = null; }
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this.infos = infos;
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this.mappings = [];
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this.cachedSourceMap = null;
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this.cachedTabWidth = void 0;
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assert_1.default.ok(infos.length > 0);
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this.length = infos.length;
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this.name = sourceFileName || null;
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if (this.name) {
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this.mappings.push(new mapping_1.default(this, {
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start: this.firstPos(),
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end: this.lastPos(),
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}));
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}
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}
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Lines.prototype.toString = function (options) {
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return this.sliceString(this.firstPos(), this.lastPos(), options);
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};
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Lines.prototype.getSourceMap = function (sourceMapName, sourceRoot) {
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if (!sourceMapName) {
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// Although we could make up a name or generate an anonymous
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// source map, instead we assume that any consumer who does not
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// provide a name does not actually want a source map.
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return null;
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}
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var targetLines = this;
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function updateJSON(json) {
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json = json || {};
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json.file = sourceMapName;
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if (sourceRoot) {
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json.sourceRoot = sourceRoot;
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}
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return json;
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}
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if (targetLines.cachedSourceMap) {
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// Since Lines objects are immutable, we can reuse any source map
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// that was previously generated. Nevertheless, we return a new
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// JSON object here to protect the cached source map from outside
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// modification.
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return updateJSON(targetLines.cachedSourceMap.toJSON());
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}
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var smg = new source_map_1.default.SourceMapGenerator(updateJSON());
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var sourcesToContents = {};
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targetLines.mappings.forEach(function (mapping) {
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var sourceCursor = mapping.sourceLines.skipSpaces(mapping.sourceLoc.start) || mapping.sourceLines.lastPos();
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var targetCursor = targetLines.skipSpaces(mapping.targetLoc.start) || targetLines.lastPos();
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while (util_1.comparePos(sourceCursor, mapping.sourceLoc.end) < 0 &&
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util_1.comparePos(targetCursor, mapping.targetLoc.end) < 0) {
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var sourceChar = mapping.sourceLines.charAt(sourceCursor);
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var targetChar = targetLines.charAt(targetCursor);
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assert_1.default.strictEqual(sourceChar, targetChar);
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var sourceName = mapping.sourceLines.name;
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// Add mappings one character at a time for maximum resolution.
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smg.addMapping({
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source: sourceName,
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original: { line: sourceCursor.line,
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column: sourceCursor.column },
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generated: { line: targetCursor.line,
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column: targetCursor.column }
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});
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if (!hasOwn.call(sourcesToContents, sourceName)) {
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var sourceContent = mapping.sourceLines.toString();
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smg.setSourceContent(sourceName, sourceContent);
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sourcesToContents[sourceName] = sourceContent;
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}
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targetLines.nextPos(targetCursor, true);
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mapping.sourceLines.nextPos(sourceCursor, true);
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}
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});
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targetLines.cachedSourceMap = smg;
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return smg.toJSON();
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};
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Lines.prototype.bootstrapCharAt = function (pos) {
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assert_1.default.strictEqual(typeof pos, "object");
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assert_1.default.strictEqual(typeof pos.line, "number");
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assert_1.default.strictEqual(typeof pos.column, "number");
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var line = pos.line, column = pos.column, strings = this.toString().split(lineTerminatorSeqExp), string = strings[line - 1];
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if (typeof string === "undefined")
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return "";
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if (column === string.length &&
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line < strings.length)
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return "\n";
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if (column >= string.length)
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return "";
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return string.charAt(column);
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};
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Lines.prototype.charAt = function (pos) {
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assert_1.default.strictEqual(typeof pos, "object");
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assert_1.default.strictEqual(typeof pos.line, "number");
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assert_1.default.strictEqual(typeof pos.column, "number");
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var line = pos.line, column = pos.column, secret = this, infos = secret.infos, info = infos[line - 1], c = column;
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if (typeof info === "undefined" || c < 0)
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return "";
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var indent = this.getIndentAt(line);
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if (c < indent)
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return " ";
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c += info.sliceStart - indent;
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if (c === info.sliceEnd &&
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line < this.length)
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return "\n";
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if (c >= info.sliceEnd)
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return "";
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return info.line.charAt(c);
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};
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Lines.prototype.stripMargin = function (width, skipFirstLine) {
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if (width === 0)
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return this;
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assert_1.default.ok(width > 0, "negative margin: " + width);
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if (skipFirstLine && this.length === 1)
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return this;
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var lines = new Lines(this.infos.map(function (info, i) {
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if (info.line && (i > 0 || !skipFirstLine)) {
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info = __assign(__assign({}, info), { indent: Math.max(0, info.indent - width) });
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}
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return info;
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}));
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if (this.mappings.length > 0) {
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var newMappings_1 = lines.mappings;
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assert_1.default.strictEqual(newMappings_1.length, 0);
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this.mappings.forEach(function (mapping) {
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newMappings_1.push(mapping.indent(width, skipFirstLine, true));
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});
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}
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return lines;
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};
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Lines.prototype.indent = function (by) {
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if (by === 0) {
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return this;
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}
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var lines = new Lines(this.infos.map(function (info) {
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if (info.line && !info.locked) {
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info = __assign(__assign({}, info), { indent: info.indent + by });
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}
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return info;
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}));
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if (this.mappings.length > 0) {
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var newMappings_2 = lines.mappings;
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assert_1.default.strictEqual(newMappings_2.length, 0);
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this.mappings.forEach(function (mapping) {
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newMappings_2.push(mapping.indent(by));
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});
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}
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return lines;
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};
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Lines.prototype.indentTail = function (by) {
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if (by === 0) {
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return this;
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}
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if (this.length < 2) {
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return this;
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}
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var lines = new Lines(this.infos.map(function (info, i) {
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if (i > 0 && info.line && !info.locked) {
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info = __assign(__assign({}, info), { indent: info.indent + by });
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}
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return info;
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}));
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if (this.mappings.length > 0) {
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var newMappings_3 = lines.mappings;
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assert_1.default.strictEqual(newMappings_3.length, 0);
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this.mappings.forEach(function (mapping) {
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newMappings_3.push(mapping.indent(by, true));
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});
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}
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return lines;
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};
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Lines.prototype.lockIndentTail = function () {
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if (this.length < 2) {
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return this;
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}
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return new Lines(this.infos.map(function (info, i) { return (__assign(__assign({}, info), { locked: i > 0 })); }));
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};
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Lines.prototype.getIndentAt = function (line) {
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assert_1.default.ok(line >= 1, "no line " + line + " (line numbers start from 1)");
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return Math.max(this.infos[line - 1].indent, 0);
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};
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Lines.prototype.guessTabWidth = function () {
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if (typeof this.cachedTabWidth === "number") {
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return this.cachedTabWidth;
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}
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var counts = []; // Sparse array.
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var lastIndent = 0;
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for (var line = 1, last = this.length; line <= last; ++line) {
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var info = this.infos[line - 1];
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var sliced = info.line.slice(info.sliceStart, info.sliceEnd);
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// Whitespace-only lines don't tell us much about the likely tab
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// width of this code.
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if (isOnlyWhitespace(sliced)) {
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continue;
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}
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var diff = Math.abs(info.indent - lastIndent);
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counts[diff] = ~~counts[diff] + 1;
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lastIndent = info.indent;
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}
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var maxCount = -1;
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var result = 2;
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for (var tabWidth = 1; tabWidth < counts.length; tabWidth += 1) {
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if (hasOwn.call(counts, tabWidth) &&
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counts[tabWidth] > maxCount) {
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maxCount = counts[tabWidth];
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result = tabWidth;
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}
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}
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return this.cachedTabWidth = result;
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};
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// Determine if the list of lines has a first line that starts with a //
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// or /* comment. If this is the case, the code may need to be wrapped in
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// parens to avoid ASI issues.
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Lines.prototype.startsWithComment = function () {
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if (this.infos.length === 0) {
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return false;
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}
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var firstLineInfo = this.infos[0], sliceStart = firstLineInfo.sliceStart, sliceEnd = firstLineInfo.sliceEnd, firstLine = firstLineInfo.line.slice(sliceStart, sliceEnd).trim();
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return firstLine.length === 0 ||
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firstLine.slice(0, 2) === "//" ||
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firstLine.slice(0, 2) === "/*";
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};
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Lines.prototype.isOnlyWhitespace = function () {
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return isOnlyWhitespace(this.toString());
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};
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Lines.prototype.isPrecededOnlyByWhitespace = function (pos) {
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var info = this.infos[pos.line - 1];
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var indent = Math.max(info.indent, 0);
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var diff = pos.column - indent;
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if (diff <= 0) {
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// If pos.column does not exceed the indentation amount, then
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// there must be only whitespace before it.
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return true;
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}
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var start = info.sliceStart;
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var end = Math.min(start + diff, info.sliceEnd);
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var prefix = info.line.slice(start, end);
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return isOnlyWhitespace(prefix);
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};
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Lines.prototype.getLineLength = function (line) {
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var info = this.infos[line - 1];
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return this.getIndentAt(line) + info.sliceEnd - info.sliceStart;
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};
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Lines.prototype.nextPos = function (pos, skipSpaces) {
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if (skipSpaces === void 0) { skipSpaces = false; }
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var l = Math.max(pos.line, 0), c = Math.max(pos.column, 0);
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if (c < this.getLineLength(l)) {
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pos.column += 1;
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return skipSpaces
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? !!this.skipSpaces(pos, false, true)
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: true;
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}
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if (l < this.length) {
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pos.line += 1;
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pos.column = 0;
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return skipSpaces
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? !!this.skipSpaces(pos, false, true)
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: true;
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}
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return false;
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};
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Lines.prototype.prevPos = function (pos, skipSpaces) {
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if (skipSpaces === void 0) { skipSpaces = false; }
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var l = pos.line, c = pos.column;
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if (c < 1) {
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l -= 1;
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if (l < 1)
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return false;
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c = this.getLineLength(l);
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}
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else {
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c = Math.min(c - 1, this.getLineLength(l));
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}
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pos.line = l;
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pos.column = c;
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return skipSpaces
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? !!this.skipSpaces(pos, true, true)
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: true;
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};
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Lines.prototype.firstPos = function () {
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// Trivial, but provided for completeness.
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return { line: 1, column: 0 };
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};
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Lines.prototype.lastPos = function () {
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return {
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line: this.length,
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column: this.getLineLength(this.length)
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};
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};
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Lines.prototype.skipSpaces = function (pos, backward, modifyInPlace) {
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if (backward === void 0) { backward = false; }
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if (modifyInPlace === void 0) { modifyInPlace = false; }
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if (pos) {
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pos = modifyInPlace ? pos : {
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line: pos.line,
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column: pos.column
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};
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}
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else if (backward) {
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pos = this.lastPos();
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}
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else {
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pos = this.firstPos();
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}
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if (backward) {
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while (this.prevPos(pos)) {
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if (!isOnlyWhitespace(this.charAt(pos)) &&
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this.nextPos(pos)) {
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return pos;
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}
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}
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return null;
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}
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else {
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while (isOnlyWhitespace(this.charAt(pos))) {
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if (!this.nextPos(pos)) {
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return null;
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}
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}
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return pos;
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}
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};
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Lines.prototype.trimLeft = function () {
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var pos = this.skipSpaces(this.firstPos(), false, true);
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return pos ? this.slice(pos) : emptyLines;
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};
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Lines.prototype.trimRight = function () {
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var pos = this.skipSpaces(this.lastPos(), true, true);
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return pos ? this.slice(this.firstPos(), pos) : emptyLines;
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};
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Lines.prototype.trim = function () {
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var start = this.skipSpaces(this.firstPos(), false, true);
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if (start === null) {
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return emptyLines;
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|
|
}
|
||
|
|
var end = this.skipSpaces(this.lastPos(), true, true);
|
||
|
|
if (end === null) {
|
||
|
|
return emptyLines;
|
||
|
|
}
|
||
|
|
return this.slice(start, end);
|
||
|
|
};
|
||
|
|
Lines.prototype.eachPos = function (callback, startPos, skipSpaces) {
|
||
|
|
if (startPos === void 0) { startPos = this.firstPos(); }
|
||
|
|
if (skipSpaces === void 0) { skipSpaces = false; }
|
||
|
|
var pos = this.firstPos();
|
||
|
|
if (startPos) {
|
||
|
|
pos.line = startPos.line,
|
||
|
|
pos.column = startPos.column;
|
||
|
|
}
|
||
|
|
if (skipSpaces && !this.skipSpaces(pos, false, true)) {
|
||
|
|
return; // Encountered nothing but spaces.
|
||
|
|
}
|
||
|
|
do
|
||
|
|
callback.call(this, pos);
|
||
|
|
while (this.nextPos(pos, skipSpaces));
|
||
|
|
};
|
||
|
|
Lines.prototype.bootstrapSlice = function (start, end) {
|
||
|
|
var strings = this.toString().split(lineTerminatorSeqExp).slice(start.line - 1, end.line);
|
||
|
|
if (strings.length > 0) {
|
||
|
|
strings.push(strings.pop().slice(0, end.column));
|
||
|
|
strings[0] = strings[0].slice(start.column);
|
||
|
|
}
|
||
|
|
return fromString(strings.join("\n"));
|
||
|
|
};
|
||
|
|
Lines.prototype.slice = function (start, end) {
|
||
|
|
if (!end) {
|
||
|
|
if (!start) {
|
||
|
|
// The client seems to want a copy of this Lines object, but
|
||
|
|
// Lines objects are immutable, so it's perfectly adequate to
|
||
|
|
// return the same object.
|
||
|
|
return this;
|
||
|
|
}
|
||
|
|
// Slice to the end if no end position was provided.
|
||
|
|
end = this.lastPos();
|
||
|
|
}
|
||
|
|
if (!start) {
|
||
|
|
throw new Error("cannot slice with end but not start");
|
||
|
|
}
|
||
|
|
var sliced = this.infos.slice(start.line - 1, end.line);
|
||
|
|
if (start.line === end.line) {
|
||
|
|
sliced[0] = sliceInfo(sliced[0], start.column, end.column);
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
assert_1.default.ok(start.line < end.line);
|
||
|
|
sliced[0] = sliceInfo(sliced[0], start.column);
|
||
|
|
sliced.push(sliceInfo(sliced.pop(), 0, end.column));
|
||
|
|
}
|
||
|
|
var lines = new Lines(sliced);
|
||
|
|
if (this.mappings.length > 0) {
|
||
|
|
var newMappings_4 = lines.mappings;
|
||
|
|
assert_1.default.strictEqual(newMappings_4.length, 0);
|
||
|
|
this.mappings.forEach(function (mapping) {
|
||
|
|
var sliced = mapping.slice(this, start, end);
|
||
|
|
if (sliced) {
|
||
|
|
newMappings_4.push(sliced);
|
||
|
|
}
|
||
|
|
}, this);
|
||
|
|
}
|
||
|
|
return lines;
|
||
|
|
};
|
||
|
|
Lines.prototype.bootstrapSliceString = function (start, end, options) {
|
||
|
|
return this.slice(start, end).toString(options);
|
||
|
|
};
|
||
|
|
Lines.prototype.sliceString = function (start, end, options) {
|
||
|
|
if (start === void 0) { start = this.firstPos(); }
|
||
|
|
if (end === void 0) { end = this.lastPos(); }
|
||
|
|
options = options_1.normalize(options);
|
||
|
|
var parts = [];
|
||
|
|
var _a = options.tabWidth, tabWidth = _a === void 0 ? 2 : _a;
|
||
|
|
for (var line = start.line; line <= end.line; ++line) {
|
||
|
|
var info = this.infos[line - 1];
|
||
|
|
if (line === start.line) {
|
||
|
|
if (line === end.line) {
|
||
|
|
info = sliceInfo(info, start.column, end.column);
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
info = sliceInfo(info, start.column);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else if (line === end.line) {
|
||
|
|
info = sliceInfo(info, 0, end.column);
|
||
|
|
}
|
||
|
|
var indent = Math.max(info.indent, 0);
|
||
|
|
var before_1 = info.line.slice(0, info.sliceStart);
|
||
|
|
if (options.reuseWhitespace &&
|
||
|
|
isOnlyWhitespace(before_1) &&
|
||
|
|
countSpaces(before_1, options.tabWidth) === indent) {
|
||
|
|
// Reuse original spaces if the indentation is correct.
|
||
|
|
parts.push(info.line.slice(0, info.sliceEnd));
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
var tabs = 0;
|
||
|
|
var spaces = indent;
|
||
|
|
if (options.useTabs) {
|
||
|
|
tabs = Math.floor(indent / tabWidth);
|
||
|
|
spaces -= tabs * tabWidth;
|
||
|
|
}
|
||
|
|
var result = "";
|
||
|
|
if (tabs > 0) {
|
||
|
|
result += new Array(tabs + 1).join("\t");
|
||
|
|
}
|
||
|
|
if (spaces > 0) {
|
||
|
|
result += new Array(spaces + 1).join(" ");
|
||
|
|
}
|
||
|
|
result += info.line.slice(info.sliceStart, info.sliceEnd);
|
||
|
|
parts.push(result);
|
||
|
|
}
|
||
|
|
return parts.join(options.lineTerminator);
|
||
|
|
};
|
||
|
|
Lines.prototype.isEmpty = function () {
|
||
|
|
return this.length < 2 && this.getLineLength(1) < 1;
|
||
|
|
};
|
||
|
|
Lines.prototype.join = function (elements) {
|
||
|
|
var separator = this;
|
||
|
|
var infos = [];
|
||
|
|
var mappings = [];
|
||
|
|
var prevInfo;
|
||
|
|
function appendLines(linesOrNull) {
|
||
|
|
if (linesOrNull === null) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
if (prevInfo) {
|
||
|
|
var info = linesOrNull.infos[0];
|
||
|
|
var indent = new Array(info.indent + 1).join(" ");
|
||
|
|
var prevLine_1 = infos.length;
|
||
|
|
var prevColumn_1 = Math.max(prevInfo.indent, 0) +
|
||
|
|
prevInfo.sliceEnd - prevInfo.sliceStart;
|
||
|
|
prevInfo.line = prevInfo.line.slice(0, prevInfo.sliceEnd) + indent + info.line.slice(info.sliceStart, info.sliceEnd);
|
||
|
|
// If any part of a line is indentation-locked, the whole line
|
||
|
|
// will be indentation-locked.
|
||
|
|
prevInfo.locked = prevInfo.locked || info.locked;
|
||
|
|
prevInfo.sliceEnd = prevInfo.line.length;
|
||
|
|
if (linesOrNull.mappings.length > 0) {
|
||
|
|
linesOrNull.mappings.forEach(function (mapping) {
|
||
|
|
mappings.push(mapping.add(prevLine_1, prevColumn_1));
|
||
|
|
});
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else if (linesOrNull.mappings.length > 0) {
|
||
|
|
mappings.push.apply(mappings, linesOrNull.mappings);
|
||
|
|
}
|
||
|
|
linesOrNull.infos.forEach(function (info, i) {
|
||
|
|
if (!prevInfo || i > 0) {
|
||
|
|
prevInfo = __assign({}, info);
|
||
|
|
infos.push(prevInfo);
|
||
|
|
}
|
||
|
|
});
|
||
|
|
}
|
||
|
|
function appendWithSeparator(linesOrNull, i) {
|
||
|
|
if (i > 0)
|
||
|
|
appendLines(separator);
|
||
|
|
appendLines(linesOrNull);
|
||
|
|
}
|
||
|
|
elements.map(function (elem) {
|
||
|
|
var lines = fromString(elem);
|
||
|
|
if (lines.isEmpty())
|
||
|
|
return null;
|
||
|
|
return lines;
|
||
|
|
}).forEach(function (linesOrNull, i) {
|
||
|
|
if (separator.isEmpty()) {
|
||
|
|
appendLines(linesOrNull);
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
appendWithSeparator(linesOrNull, i);
|
||
|
|
}
|
||
|
|
});
|
||
|
|
if (infos.length < 1)
|
||
|
|
return emptyLines;
|
||
|
|
var lines = new Lines(infos);
|
||
|
|
lines.mappings = mappings;
|
||
|
|
return lines;
|
||
|
|
};
|
||
|
|
Lines.prototype.concat = function () {
|
||
|
|
var args = [];
|
||
|
|
for (var _i = 0; _i < arguments.length; _i++) {
|
||
|
|
args[_i] = arguments[_i];
|
||
|
|
}
|
||
|
|
var list = [this];
|
||
|
|
list.push.apply(list, args);
|
||
|
|
assert_1.default.strictEqual(list.length, args.length + 1);
|
||
|
|
return emptyLines.join(list);
|
||
|
|
};
|
||
|
|
return Lines;
|
||
|
|
}());
|
||
|
|
exports.Lines = Lines;
|
||
|
|
var fromStringCache = {};
|
||
|
|
var hasOwn = fromStringCache.hasOwnProperty;
|
||
|
|
var maxCacheKeyLen = 10;
|
||
|
|
function countSpaces(spaces, tabWidth) {
|
||
|
|
var count = 0;
|
||
|
|
var len = spaces.length;
|
||
|
|
for (var i = 0; i < len; ++i) {
|
||
|
|
switch (spaces.charCodeAt(i)) {
|
||
|
|
case 9: // '\t'
|
||
|
|
assert_1.default.strictEqual(typeof tabWidth, "number");
|
||
|
|
assert_1.default.ok(tabWidth > 0);
|
||
|
|
var next = Math.ceil(count / tabWidth) * tabWidth;
|
||
|
|
if (next === count) {
|
||
|
|
count += tabWidth;
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
count = next;
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
case 11: // '\v'
|
||
|
|
case 12: // '\f'
|
||
|
|
case 13: // '\r'
|
||
|
|
case 0xfeff: // zero-width non-breaking space
|
||
|
|
// These characters contribute nothing to indentation.
|
||
|
|
break;
|
||
|
|
case 32: // ' '
|
||
|
|
default: // Treat all other whitespace like ' '.
|
||
|
|
count += 1;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return count;
|
||
|
|
}
|
||
|
|
exports.countSpaces = countSpaces;
|
||
|
|
var leadingSpaceExp = /^\s*/;
|
||
|
|
// As specified here: http://www.ecma-international.org/ecma-262/6.0/#sec-line-terminators
|
||
|
|
var lineTerminatorSeqExp = /\u000D\u000A|\u000D(?!\u000A)|\u000A|\u2028|\u2029/;
|
||
|
|
/**
|
||
|
|
* @param {Object} options - Options object that configures printing.
|
||
|
|
*/
|
||
|
|
function fromString(string, options) {
|
||
|
|
if (string instanceof Lines)
|
||
|
|
return string;
|
||
|
|
string += "";
|
||
|
|
var tabWidth = options && options.tabWidth;
|
||
|
|
var tabless = string.indexOf("\t") < 0;
|
||
|
|
var cacheable = !options && tabless && (string.length <= maxCacheKeyLen);
|
||
|
|
assert_1.default.ok(tabWidth || tabless, "No tab width specified but encountered tabs in string\n" + string);
|
||
|
|
if (cacheable && hasOwn.call(fromStringCache, string))
|
||
|
|
return fromStringCache[string];
|
||
|
|
var lines = new Lines(string.split(lineTerminatorSeqExp).map(function (line) {
|
||
|
|
// TODO: handle null exec result
|
||
|
|
var spaces = leadingSpaceExp.exec(line)[0];
|
||
|
|
return {
|
||
|
|
line: line,
|
||
|
|
indent: countSpaces(spaces, tabWidth),
|
||
|
|
// Boolean indicating whether this line can be reindented.
|
||
|
|
locked: false,
|
||
|
|
sliceStart: spaces.length,
|
||
|
|
sliceEnd: line.length
|
||
|
|
};
|
||
|
|
}), options_1.normalize(options).sourceFileName);
|
||
|
|
if (cacheable)
|
||
|
|
fromStringCache[string] = lines;
|
||
|
|
return lines;
|
||
|
|
}
|
||
|
|
exports.fromString = fromString;
|
||
|
|
function isOnlyWhitespace(string) {
|
||
|
|
return !/\S/.test(string);
|
||
|
|
}
|
||
|
|
function sliceInfo(info, startCol, endCol) {
|
||
|
|
var sliceStart = info.sliceStart;
|
||
|
|
var sliceEnd = info.sliceEnd;
|
||
|
|
var indent = Math.max(info.indent, 0);
|
||
|
|
var lineLength = indent + sliceEnd - sliceStart;
|
||
|
|
if (typeof endCol === "undefined") {
|
||
|
|
endCol = lineLength;
|
||
|
|
}
|
||
|
|
startCol = Math.max(startCol, 0);
|
||
|
|
endCol = Math.min(endCol, lineLength);
|
||
|
|
endCol = Math.max(endCol, startCol);
|
||
|
|
if (endCol < indent) {
|
||
|
|
indent = endCol;
|
||
|
|
sliceEnd = sliceStart;
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
sliceEnd -= lineLength - endCol;
|
||
|
|
}
|
||
|
|
lineLength = endCol;
|
||
|
|
lineLength -= startCol;
|
||
|
|
if (startCol < indent) {
|
||
|
|
indent -= startCol;
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
startCol -= indent;
|
||
|
|
indent = 0;
|
||
|
|
sliceStart += startCol;
|
||
|
|
}
|
||
|
|
assert_1.default.ok(indent >= 0);
|
||
|
|
assert_1.default.ok(sliceStart <= sliceEnd);
|
||
|
|
assert_1.default.strictEqual(lineLength, indent + sliceEnd - sliceStart);
|
||
|
|
if (info.indent === indent &&
|
||
|
|
info.sliceStart === sliceStart &&
|
||
|
|
info.sliceEnd === sliceEnd) {
|
||
|
|
return info;
|
||
|
|
}
|
||
|
|
return {
|
||
|
|
line: info.line,
|
||
|
|
indent: indent,
|
||
|
|
// A destructive slice always unlocks indentation.
|
||
|
|
locked: false,
|
||
|
|
sliceStart: sliceStart,
|
||
|
|
sliceEnd: sliceEnd
|
||
|
|
};
|
||
|
|
}
|
||
|
|
function concat(elements) {
|
||
|
|
return emptyLines.join(elements);
|
||
|
|
}
|
||
|
|
exports.concat = concat;
|
||
|
|
;
|
||
|
|
// The emptyLines object needs to be created all the way down here so that
|
||
|
|
// Lines.prototype will be fully populated.
|
||
|
|
var emptyLines = fromString("");
|