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					168 lines
				
				5.6 KiB
			
		
		
			
		
	
	
					168 lines
				
				5.6 KiB
			| 
											3 years ago
										 | import { SetArray, put } from '@jridgewell/set-array'; | ||
|  | import { encode } from '@jridgewell/sourcemap-codec'; | ||
|  | 
 | ||
|  | /** | ||
|  |  * A low-level API to associate a generated position with an original source position. Line and | ||
|  |  * column here are 0-based, unlike `addMapping`. | ||
|  |  */ | ||
|  | let addSegment; | ||
|  | /** | ||
|  |  * A high-level API to associate a generated position with an original source position. Line is | ||
|  |  * 1-based, but column is 0-based, due to legacy behavior in `source-map` library. | ||
|  |  */ | ||
|  | let addMapping; | ||
|  | /** | ||
|  |  * Adds/removes the content of the source file to the source map. | ||
|  |  */ | ||
|  | let setSourceContent; | ||
|  | /** | ||
|  |  * Returns a sourcemap object (with decoded mappings) suitable for passing to a library that expects | ||
|  |  * a sourcemap, or to JSON.stringify. | ||
|  |  */ | ||
|  | let decodedMap; | ||
|  | /** | ||
|  |  * Returns a sourcemap object (with encoded mappings) suitable for passing to a library that expects | ||
|  |  * a sourcemap, or to JSON.stringify. | ||
|  |  */ | ||
|  | let encodedMap; | ||
|  | /** | ||
|  |  * Returns an array of high-level mapping objects for every recorded segment, which could then be | ||
|  |  * passed to the `source-map` library. | ||
|  |  */ | ||
|  | let allMappings; | ||
|  | /** | ||
|  |  * Provides the state to generate a sourcemap. | ||
|  |  */ | ||
|  | class GenMapping { | ||
|  |     constructor({ file, sourceRoot } = {}) { | ||
|  |         this._names = new SetArray(); | ||
|  |         this._sources = new SetArray(); | ||
|  |         this._sourcesContent = []; | ||
|  |         this._mappings = []; | ||
|  |         this.file = file; | ||
|  |         this.sourceRoot = sourceRoot; | ||
|  |     } | ||
|  | } | ||
|  | (() => { | ||
|  |     addSegment = (map, genLine, genColumn, source, sourceLine, sourceColumn, name) => { | ||
|  |         const { _mappings: mappings, _sources: sources, _sourcesContent: sourcesContent, _names: names, } = map; | ||
|  |         const line = getLine(mappings, genLine); | ||
|  |         if (source == null) { | ||
|  |             const seg = [genColumn]; | ||
|  |             const index = getColumnIndex(line, genColumn, seg); | ||
|  |             return insert(line, index, seg); | ||
|  |         } | ||
|  |         const sourcesIndex = put(sources, source); | ||
|  |         const seg = name | ||
|  |             ? [genColumn, sourcesIndex, sourceLine, sourceColumn, put(names, name)] | ||
|  |             : [genColumn, sourcesIndex, sourceLine, sourceColumn]; | ||
|  |         const index = getColumnIndex(line, genColumn, seg); | ||
|  |         if (sourcesIndex === sourcesContent.length) | ||
|  |             sourcesContent[sourcesIndex] = null; | ||
|  |         insert(line, index, seg); | ||
|  |     }; | ||
|  |     addMapping = (map, mapping) => { | ||
|  |         const { generated, source, original, name } = mapping; | ||
|  |         return addSegment(map, generated.line - 1, generated.column, source, original == null ? undefined : original.line - 1, original === null || original === void 0 ? void 0 : original.column, name); | ||
|  |     }; | ||
|  |     setSourceContent = (map, source, content) => { | ||
|  |         const { _sources: sources, _sourcesContent: sourcesContent } = map; | ||
|  |         sourcesContent[put(sources, source)] = content; | ||
|  |     }; | ||
|  |     decodedMap = (map) => { | ||
|  |         const { file, sourceRoot, _mappings: mappings, _sources: sources, _sourcesContent: sourcesContent, _names: names, } = map; | ||
|  |         return { | ||
|  |             version: 3, | ||
|  |             file, | ||
|  |             names: names.array, | ||
|  |             sourceRoot: sourceRoot || undefined, | ||
|  |             sources: sources.array, | ||
|  |             sourcesContent, | ||
|  |             mappings, | ||
|  |         }; | ||
|  |     }; | ||
|  |     encodedMap = (map) => { | ||
|  |         const decoded = decodedMap(map); | ||
|  |         return Object.assign(Object.assign({}, decoded), { mappings: encode(decoded.mappings) }); | ||
|  |     }; | ||
|  |     allMappings = (map) => { | ||
|  |         const out = []; | ||
|  |         const { _mappings: mappings, _sources: sources, _names: names } = map; | ||
|  |         for (let i = 0; i < mappings.length; i++) { | ||
|  |             const line = mappings[i]; | ||
|  |             for (let j = 0; j < line.length; j++) { | ||
|  |                 const seg = line[j]; | ||
|  |                 const generated = { line: i + 1, column: seg[0] }; | ||
|  |                 let source = undefined; | ||
|  |                 let original = undefined; | ||
|  |                 let name = undefined; | ||
|  |                 if (seg.length !== 1) { | ||
|  |                     source = sources.array[seg[1]]; | ||
|  |                     original = { line: seg[2] + 1, column: seg[3] }; | ||
|  |                     if (seg.length === 5) | ||
|  |                         name = names.array[seg[4]]; | ||
|  |                 } | ||
|  |                 out.push({ generated, source, original, name }); | ||
|  |             } | ||
|  |         } | ||
|  |         return out; | ||
|  |     }; | ||
|  | })(); | ||
|  | function getLine(mappings, index) { | ||
|  |     for (let i = mappings.length; i <= index; i++) { | ||
|  |         mappings[i] = []; | ||
|  |     } | ||
|  |     return mappings[index]; | ||
|  | } | ||
|  | function getColumnIndex(line, column, seg) { | ||
|  |     let index = line.length; | ||
|  |     for (let i = index - 1; i >= 0; i--, index--) { | ||
|  |         const current = line[i]; | ||
|  |         const col = current[0]; | ||
|  |         if (col > column) | ||
|  |             continue; | ||
|  |         if (col < column) | ||
|  |             break; | ||
|  |         const cmp = compare(current, seg); | ||
|  |         if (cmp === 0) | ||
|  |             return index; | ||
|  |         if (cmp < 0) | ||
|  |             break; | ||
|  |     } | ||
|  |     return index; | ||
|  | } | ||
|  | function compare(a, b) { | ||
|  |     let cmp = compareNum(a.length, b.length); | ||
|  |     if (cmp !== 0) | ||
|  |         return cmp; | ||
|  |     // We've already checked genColumn
 | ||
|  |     if (a.length === 1) | ||
|  |         return 0; | ||
|  |     cmp = compareNum(a[1], b[1]); | ||
|  |     if (cmp !== 0) | ||
|  |         return cmp; | ||
|  |     cmp = compareNum(a[2], b[2]); | ||
|  |     if (cmp !== 0) | ||
|  |         return cmp; | ||
|  |     cmp = compareNum(a[3], b[3]); | ||
|  |     if (cmp !== 0) | ||
|  |         return cmp; | ||
|  |     if (a.length === 4) | ||
|  |         return 0; | ||
|  |     return compareNum(a[4], b[4]); | ||
|  | } | ||
|  | function compareNum(a, b) { | ||
|  |     return a - b; | ||
|  | } | ||
|  | function insert(array, index, value) { | ||
|  |     if (index === -1) | ||
|  |         return; | ||
|  |     for (let i = array.length; i > index; i--) { | ||
|  |         array[i] = array[i - 1]; | ||
|  |     } | ||
|  |     array[index] = value; | ||
|  | } | ||
|  | 
 | ||
|  | export { GenMapping, addMapping, addSegment, allMappings, decodedMap, encodedMap, setSourceContent }; | ||
|  | //# sourceMappingURL=gen-mapping.mjs.map
 |