jbrowse2: x/static/js/4284.61dbc58f.chunk.js.map annotate

annotate x/static/js/4284.61dbc58f.chunk.js.map @ 125:49f3d3878413 draft

planemo upload for repository https://github.com/galaxyproject/tools-iuc/tree/master/tools/jbrowse2 commit 5ea1f9c1eef1de76232e69aa6d34cda77d90d566

author	fubar
date	Sat, 05 Oct 2024 23:58:05 +0000
parents
children

rev	line source
125 49f3d3878413 planemo upload for repository https://github.com/galaxyproject/tools-iuc/tree/master/tools/jbrowse2 commit 5ea1f9c1eef1de76232e69aa6d34cda77d90d566 fubar parents: diff changeset	1 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{ unzip } from '@gmod/bgzf-filehandle'\n\n// locals\nimport { isGzip, SimpleFeature } from '../../util'\nimport { openLocation } from '../../util/io'\nimport { BaseAdapter } from '../BaseAdapter'\n\nexport default class CytobandAdapter extends BaseAdapter {\n async getData() {\n const pm = this.pluginManager\n const loc = this.getConf('cytobandLocation')\n if (loc.uri === '' \|\| loc.uri === '/path/to/cytoband.txt.gz') {\n return []\n }\n const buffer = await openLocation(loc, pm).readFile()\n const buf = isGzip(buffer) ? await unzip(buffer) : buffer\n const text = new TextDecoder('utf8', { fatal: true }).decode(buf)\n return text\n .split(/\\n\|\\r\\n\|\\r/)\n .filter(f => !!f.trim())\n .map((line, i) => {\n const [refName, start, end, name, type] = line.split('\\t')\n return new SimpleFeature({\n uniqueId: `${i}`,\n refName: refName!,\n start: +start!,\n end: +end!,\n name: name!,\n type: type!,\n })\n })\n }\n\n freeResources(/* { region } /): void {}\n}\n","import { Buffer } from 'buffer'\n//@ts-ignore\nimport { Z_SYNC_FLUSH, Inflate } from 'pako'\n\ninterface VirtualOffset {\n blockPosition: number\n dataPosition: number\n}\ninterface Chunk {\n minv: VirtualOffset\n maxv: VirtualOffset\n}\n\n// browserify-zlib, which is the zlib shim used by default in webpacked code,\n// does not properly uncompress bgzf chunks that contain more than\n// one bgzf block, so export an unzip function that uses pako directly\n// if we are running in a browser.\nasync function unzip(inputData: Buffer) {\n try {\n let strm\n let pos = 0\n let i = 0\n const chunks = []\n let totalSize = 0\n let inflator\n do {\n const remainingInput = inputData.subarray(pos)\n inflator = new Inflate()\n //@ts-ignore\n ;({ strm } = inflator)\n inflator.push(remainingInput, Z_SYNC_FLUSH)\n if (inflator.err) {\n throw new Error(inflator.msg)\n }\n\n pos += strm.next_in\n chunks[i] = inflator.result as Uint8Array\n totalSize += chunks[i].length\n i += 1\n } while (strm.avail_in)\n\n const result = new Uint8Array(totalSize)\n for (let i = 0, offset = 0; i < chunks.length; i++) {\n result.set(chunks[i], offset)\n offset += chunks[i].length\n }\n return Buffer.from(result)\n } catch (e) {\n //cleanup error message\n if (`${e}`.match(/incorrect header check/)) {\n throw new Error(\n 'problem decompressing block: incorrect gzip header check',\n )\n }\n throw e\n }\n}\n\n// similar to pakounzip, except it does extra counting\n// to return the positions of compressed and decompressed\n// data offsets\nasync function unzipChunk(inputData: Buffer) {\n try {\n let strm\n let cpos = 0\n let dpos = 0\n const blocks = []\n const cpositions = []\n const dpositions = []\n do {\n const remainingInput = inputData.slice(cpos)\n const inflator = new Inflate()\n // @ts-ignore\n ;({ strm } = inflator)\n inflator.push(remainingInput, Z_SYNC_FLUSH)\n if (inflator.err) {\n throw new Error(inflator.msg)\n }\n\n const buffer = Buffer.from(inflator.result)\n blocks.push(buffer)\n\n cpositions.push(cpos)\n dpositions.push(dpos)\n\n cpos += strm.next_in\n dpos += buffer.length\n } while (strm.avail_in)\n\n const buffer = Buffer.concat(blocks)\n return { buffer, cpositions, dpositions }\n } catch (e) {\n //cleanup error message\n if (`${e}`.match(/incorrect header check/)) {\n throw new Error(\n 'problem decompressing block: incorrect gzip header check',\n )\n }\n throw e\n }\n}\n\n// similar to unzipChunk above but slices (0,minv.dataPosition) and\n// (maxv.dataPosition,end) off\nasync function unzipChunkSlice(inputData: Buffer, chunk: Chunk) {\n try {\n let strm\n const { minv, maxv } = chunk\n let cpos = minv.blockPosition\n let dpos = minv.dataPosition\n const chunks = []\n const cpositions = []\n const dpositions = []\n\n let totalSize = 0\n let i = 0\n do {\n const remainingInput = inputData.subarray(cpos - minv.blockPosition)\n const inflator = new Inflate()\n // @ts-ignore\n ;({ strm } = inflator)\n inflator.push(remainingInput, Z_SYNC_FLUSH)\n if (inflator.err) {\n throw new Error(inflator.msg)\n }\n\n const buffer = inflator.result\n chunks.push(buffer as Uint8Array)\n let len = buffer.length\n\n cpositions.push(cpos)\n dpositions.push(dpos)\n if (chunks.length === 1 && minv.dataPosition) {\n // this is the first chunk, trim it\n chunks[0] = chunks[0].subarray(minv.dataPosition)\n len = chunks[0].length\n }\n const origCpos = cpos\n cpos += strm.next_in\n dpos += len\n\n if (origCpos >= maxv.blockPosition) {\n // this is the last chunk, trim it and stop decompressing\n // note if it is the same block is minv it subtracts that already\n // trimmed part of the slice length\n\n chunks[i] = chunks[i].subarray(\n 0,\n maxv.blockPosition === minv.blockPosition\n ? maxv.dataPosition - minv.dataPosition + 1\n : maxv.dataPosition + 1,\n )\n\n cpositions.push(cpos)\n dpositions.push(dpos)\n totalSize += chunks[i].length\n break\n }\n totalSize += chunks[i].length\n i++\n } while (strm.avail_in)\n\n const result = new Uint8Array(totalSize)\n for (let i = 0, offset = 0; i < chunks.length; i++) {\n result.set(chunks[i], offset)\n offset += chunks[i].length\n }\n const buffer = Buffer.from(result)\n\n return { buffer, cpositions, dpositions }\n } catch (e) {\n //cleanup error message\n if (`${e}`.match(/incorrect header check/)) {\n throw new Error(\n 'problem decompressing block: incorrect gzip header check',\n )\n }\n throw e\n }\n}\n\nfunction nodeUnzip() {\n throw new Error('nodeUnzip not implemented.')\n}\n\nexport { unzip, unzipChunk, unzipChunkSlice, unzip as pakoUnzip, nodeUnzip }\n","import Long from 'long'\nimport { Buffer } from 'buffer'\nimport { LocalFile, GenericFilehandle } from 'generic-filehandle'\n\n// const COMPRESSED_POSITION = 0\nconst UNCOMPRESSED_POSITION = 1\n\nexport default class GziIndex {\n filehandle: GenericFilehandle\n\n index?: any\n\n constructor({\n filehandle,\n path,\n }: {\n filehandle?: GenericFilehandle\n path?: string\n }) {\n if (filehandle) {\n this.filehandle = filehandle\n } else if (path) {\n this.filehandle = new LocalFile(path)\n } else {\n throw new TypeError('either filehandle or path must be defined')\n }\n }\n\n _readLongWithOverflow(buf: Buffer, offset = 0, unsigned = true) {\n //@ts-ignore\n const long = Long.fromBytesLE(buf.slice(offset, offset + 8), unsigned)\n if (\n long.greaterThan(Number.MAX_SAFE_INTEGER) \|\|\n long.lessThan(Number.MIN_SAFE_INTEGER)\n ) {\n throw new TypeError('integer overflow')\n }\n\n return long.toNumber()\n }\n\n _getIndex() {\n if (!this.index) {\n this.index = this._readIndex()\n }\n return this.index\n }\n\n async _readIndex() {\n let buf = Buffer.allocUnsafe(8)\n await this.filehandle.read(buf, 0, 8, 0)\n const numEntries = this._readLongWithOverflow(buf, 0, true)\n if (!numEntries) {\n return [[0, 0]]\n }\n\n const entries = new Array(numEntries + 1)\n entries[0] = [0, 0]\n\n // TODO rewrite this to make an index-index that stays in memory\n const bufSize = 8 2 * numEntries\n if (bufSize > Number.MAX_SAFE_INTEGER) {\n throw new TypeError('integer overflow')\n }\n buf = Buffer.allocUnsafe(bufSize)\n await this.filehandle.read(buf, 0, bufSize, 8)\n for (let entryNumber = 0; entryNumber < numEntries; entryNumber += 1) {\n const compressedPosition = this._readLongWithOverflow(\n buf,\n entryNumber * 16,\n )\n const uncompressedPosition = this._readLongWithOverflow(\n buf,\n entryNumber * 16 + 8,\n )\n entries[entryNumber + 1] = [compressedPosition, uncompressedPosition]\n }\n\n return entries\n }\n\n async getLastBlock() {\n const entries = await this._getIndex()\n if (!entries.length) {\n return undefined\n }\n return entries[entries.length - 1]\n }\n\n async getRelevantBlocksForRead(length: number, position: number) {\n const endPosition = position + length\n if (length === 0) {\n return []\n }\n const entries = await this._getIndex()\n const relevant = []\n\n // binary search to find the block that the\n // read starts in and extend forward from that\n const compare = (entry: any, nextEntry: any) => {\n const uncompressedPosition = entry[UNCOMPRESSED_POSITION]\n const nextUncompressedPosition = nextEntry\n ? nextEntry[UNCOMPRESSED_POSITION]\n : Infinity\n // block overlaps read start\n if (\n uncompressedPosition <= position &&\n nextUncompressedPosition > position\n ) {\n return 0\n // block is before read start\n }\n if (uncompressedPosition < position) {\n return -1\n }\n // block is after read start\n return 1\n }\n\n let lowerBound = 0\n let upperBound = entries.length - 1\n let searchPosition = Math.floor(entries.length / 2)\n\n let comparison = compare(\n entries[searchPosition],\n entries[searchPosition + 1],\n )\n while (comparison !== 0) {\n if (comparison > 0) {\n upperBound = searchPosition - 1\n } else if (comparison < 0) {\n lowerBound = searchPosition + 1\n }\n searchPosition = Math.ceil((upperBound - lowerBound) / 2) + lowerBound\n comparison = compare(entries[searchPosition], entries[searchPosition + 1])\n }\n\n // here's where we read forward\n relevant.push(entries[searchPosition])\n let i = searchPosition + 1\n for (; i < entries.length; i += 1) {\n relevant.push(entries[i])\n if (entries[i][UNCOMPRESSED_POSITION] >= endPosition) {\n break\n }\n }\n if (relevant[relevant.length - 1][UNCOMPRESSED_POSITION] < endPosition) {\n relevant.push([])\n }\n return relevant\n }\n}\n","import { Buffer } from 'buffer'\nimport { LocalFile, GenericFilehandle } from 'generic-filehandle'\n\n// locals\nimport { unzip } from './unzip'\nimport GziIndex from './gziIndex'\n\nexport default class BgzFilehandle {\n filehandle: GenericFilehandle\n gzi: GziIndex\n\n constructor({\n filehandle,\n path,\n gziFilehandle,\n gziPath,\n }: {\n filehandle?: GenericFilehandle\n path?: string\n gziFilehandle?: GenericFilehandle\n gziPath?: string\n }) {\n if (filehandle) {\n this.filehandle = filehandle\n } else if (path) {\n this.filehandle = new LocalFile(path)\n } else {\n throw new TypeError('either filehandle or path must be defined')\n }\n\n if (!gziFilehandle && !gziPath && !path) {\n throw new TypeError('either gziFilehandle or gziPath must be defined')\n }\n\n this.gzi = new GziIndex({\n filehandle: gziFilehandle,\n path: !gziFilehandle && !gziPath && path ? gziPath : `${path}.gzi`,\n })\n }\n\n async stat() {\n const compressedStat = await this.filehandle.stat()\n return Object.assign(compressedStat, {\n size: await this.getUncompressedFileSize(),\n blocks: undefined,\n blksize: undefined,\n })\n }\n\n async getUncompressedFileSize() {\n // read the last block's ISIZE (see gzip RFC),\n // and add it to its uncompressedPosition\n const [, uncompressedPosition] = await this.gzi.getLastBlock()\n\n const { size } = await this.filehandle.stat()\n\n const buf = Buffer.allocUnsafe(4)\n // note: there should be a 28-byte EOF marker (an empty block) at\n // the end of the file, so we skip backward past that\n const { bytesRead } = await this.filehandle.read(buf, 0, 4, size - 28 - 4)\n if (bytesRead !== 4) {\n throw new Error('read error')\n }\n const lastBlockUncompressedSize = buf.readUInt32LE(0)\n return uncompressedPosition + lastBlockUncompressedSize\n }\n\n async _readAndUncompressBlock(\n blockBuffer: Buffer,\n [compressedPosition]: [number],\n [nextCompressedPosition]: [number],\n ) {\n let next = nextCompressedPosition\n if (!next) {\n next = (await this.filehandle.stat()).size\n }\n\n // read the compressed data into the block buffer\n const blockCompressedLength = next - compressedPosition\n\n await this.filehandle.read(\n blockBuffer,\n 0,\n blockCompressedLength,\n compressedPosition,\n )\n\n // uncompress it\n const unzippedBuffer = await unzip(\n blockBuffer.slice(0, blockCompressedLength),\n )\n\n return unzippedBuffer as Buffer\n }\n\n async read(buf: Buffer, offset: number, length: number, position: number) {\n // get the block positions for this read\n const blockPositions = await this.gzi.getRelevantBlocksForRead(\n length,\n position,\n )\n const blockBuffer = Buffer.allocUnsafe(32768 * 2)\n 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}\n}\n"],"names":["CytobandAdapter","BaseAdapter","getData","pm","this","pluginManager","loc","getConf","uri","buffer","openLocation","readFile","buf","isGzip","unzip","TextDecoder","fatal","decode","split","filter","f","trim","map","line","i","refName","start","end","name","type","SimpleFeature","uniqueId","freeResources","async","inputData","strm","pos","chunks","inflator","totalSize","remainingInput","subarray","Inflate","push","Z_SYNC_FLUSH","err","Error","msg","next_in","result","length","avail_in","Uint8Array","offset","set","from","e","match","unzipChunkSlice","chunk","minv","maxv","cpos","blockPosition","dpos","dataPosition","cpositions","dpositions","len","origCpos","GziIndex","constructor","filehandle","path","TypeError","_readLongWithOverflow","unsigned","long","slice","greaterThan","Number","MAX_SAFE_INTEGER","lessThan","MIN_SAFE_INTEGER","toNumber","_getIndex","index","_readIndex","allocUnsafe","read","numEntries","entries","Array","bufSize","entryNumber","compressedPosition","uncompressedPosition","getLastBlock","getRelevantBlocksForRead","position","endPosition","relevant","compare","entry","nextEntry","nextUncompressedPosition","Infinity","lowerBound","upperBound","searchPosition","Math","floor","comparison","ceil","BgzFilehandle","gziFilehandle","gziPath","gzi","stat","compressedStat","Object","assign","size","getUncompressedFileSize","blocks","undefined","blksize","bytesRead","readUInt32LE","_readAndUncompressBlock","blockBuffer","nextCompressedPosition","next","blockCompressedLength","blockPositions","destinationOffset","blockNum","uncompressedBuffer","sourceOffset","sourceEnd","min","copy"],"sourceRoot":""}

rev

line source

125

49f3d3878413 planemo upload for repository https://github.com/galaxyproject/tools-iuc/tree/master/tools/jbrowse2 commit 5ea1f9c1eef1de76232e69aa6d34cda77d90d566

fubar

parents:

diff changeset

1 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'buffer'\n//@ts-ignore\nimport { Z_SYNC_FLUSH, Inflate } from 'pako'\n\ninterface VirtualOffset {\n blockPosition: number\n dataPosition: number\n}\ninterface Chunk {\n minv: VirtualOffset\n maxv: VirtualOffset\n}\n\n// browserify-zlib, which is the zlib shim used by default in webpacked code,\n// does not properly uncompress bgzf chunks that contain more than\n// one bgzf block, so export an unzip function that uses pako directly\n// if we are running in a browser.\nasync function unzip(inputData: Buffer) {\n try {\n let strm\n let pos = 0\n let i = 0\n const chunks = []\n let totalSize = 0\n let inflator\n do {\n const remainingInput = inputData.subarray(pos)\n inflator = new Inflate()\n //@ts-ignore\n ;({ strm } = inflator)\n inflator.push(remainingInput, Z_SYNC_FLUSH)\n if (inflator.err) {\n throw new Error(inflator.msg)\n }\n\n pos += strm.next_in\n chunks[i] = inflator.result as Uint8Array\n totalSize += chunks[i].length\n i += 1\n } while (strm.avail_in)\n\n const result = new Uint8Array(totalSize)\n for (let i = 0, offset = 0; i < chunks.length; i++) {\n result.set(chunks[i], offset)\n offset += chunks[i].length\n }\n return Buffer.from(result)\n } catch (e) {\n //cleanup error message\n if (`${e}`.match(/incorrect header check/)) {\n throw new Error(\n 'problem decompressing block: incorrect gzip header check',\n )\n }\n throw e\n }\n}\n\n// similar to pakounzip, except it does extra counting\n// to return the positions of compressed and decompressed\n// data offsets\nasync function unzipChunk(inputData: Buffer) {\n try {\n let strm\n let cpos = 0\n let dpos = 0\n const blocks = []\n const cpositions = []\n const dpositions = []\n do {\n const remainingInput = inputData.slice(cpos)\n const inflator = new Inflate()\n // @ts-ignore\n ;({ strm } = inflator)\n inflator.push(remainingInput, Z_SYNC_FLUSH)\n if (inflator.err) {\n throw new Error(inflator.msg)\n }\n\n const buffer = Buffer.from(inflator.result)\n blocks.push(buffer)\n\n cpositions.push(cpos)\n dpositions.push(dpos)\n\n cpos += strm.next_in\n dpos += buffer.length\n } while (strm.avail_in)\n\n const buffer = Buffer.concat(blocks)\n return { buffer, cpositions, dpositions }\n } catch (e) {\n //cleanup error message\n if (`${e}`.match(/incorrect header check/)) {\n throw new Error(\n 'problem decompressing block: incorrect gzip header check',\n )\n }\n throw e\n }\n}\n\n// similar to unzipChunk above but slices (0,minv.dataPosition) and\n// (maxv.dataPosition,end) off\nasync function unzipChunkSlice(inputData: Buffer, chunk: Chunk) {\n try {\n let strm\n const { minv, maxv } = chunk\n let cpos = minv.blockPosition\n let dpos = minv.dataPosition\n const chunks = []\n const cpositions = []\n const dpositions = []\n\n let totalSize = 0\n let i = 0\n do {\n const remainingInput = inputData.subarray(cpos - minv.blockPosition)\n const inflator = new Inflate()\n // @ts-ignore\n ;({ strm } = inflator)\n inflator.push(remainingInput, Z_SYNC_FLUSH)\n if (inflator.err) {\n throw new Error(inflator.msg)\n }\n\n const buffer = inflator.result\n chunks.push(buffer as Uint8Array)\n let len = buffer.length\n\n cpositions.push(cpos)\n dpositions.push(dpos)\n if (chunks.length === 1 && minv.dataPosition) {\n // this is the first chunk, trim it\n chunks[0] = chunks[0].subarray(minv.dataPosition)\n len = chunks[0].length\n }\n const origCpos = cpos\n cpos += strm.next_in\n dpos += len\n\n if (origCpos >= maxv.blockPosition) {\n // this is the last chunk, trim it and stop decompressing\n // note if it is the same block is minv it subtracts that already\n // trimmed part of the slice length\n\n chunks[i] = chunks[i].subarray(\n 0,\n maxv.blockPosition === minv.blockPosition\n ? maxv.dataPosition - minv.dataPosition + 1\n : maxv.dataPosition + 1,\n )\n\n cpositions.push(cpos)\n dpositions.push(dpos)\n totalSize += chunks[i].length\n break\n }\n totalSize += chunks[i].length\n i++\n } while (strm.avail_in)\n\n const result = new Uint8Array(totalSize)\n for (let i = 0, offset = 0; i < chunks.length; i++) {\n result.set(chunks[i], offset)\n offset += chunks[i].length\n }\n const buffer = Buffer.from(result)\n\n return { buffer, cpositions, dpositions }\n } catch (e) {\n //cleanup error message\n if (`${e}`.match(/incorrect header check/)) {\n throw new Error(\n 'problem decompressing block: incorrect gzip header check',\n )\n }\n throw e\n }\n}\n\nfunction nodeUnzip() {\n throw new Error('nodeUnzip not implemented.')\n}\n\nexport { unzip, unzipChunk, unzipChunkSlice, unzip as pakoUnzip, nodeUnzip }\n","import Long from 'long'\nimport { Buffer } from 'buffer'\nimport { LocalFile, GenericFilehandle } from 'generic-filehandle'\n\n// const COMPRESSED_POSITION = 0\nconst UNCOMPRESSED_POSITION = 1\n\nexport default class GziIndex {\n filehandle: GenericFilehandle\n\n index?: any\n\n constructor({\n filehandle,\n path,\n }: {\n filehandle?: GenericFilehandle\n path?: string\n }) {\n if (filehandle) {\n this.filehandle = filehandle\n } else if (path) {\n this.filehandle = new LocalFile(path)\n } else {\n throw new TypeError('either filehandle or path must be defined')\n }\n }\n\n _readLongWithOverflow(buf: Buffer, offset = 0, unsigned = true) {\n //@ts-ignore\n const long = Long.fromBytesLE(buf.slice(offset, offset + 8), unsigned)\n if (\n long.greaterThan(Number.MAX_SAFE_INTEGER) ||\n long.lessThan(Number.MIN_SAFE_INTEGER)\n ) {\n throw new TypeError('integer overflow')\n }\n\n return long.toNumber()\n }\n\n _getIndex() {\n if (!this.index) {\n this.index = this._readIndex()\n }\n return this.index\n }\n\n async _readIndex() {\n let buf = Buffer.allocUnsafe(8)\n await this.filehandle.read(buf, 0, 8, 0)\n const numEntries = this._readLongWithOverflow(buf, 0, true)\n if (!numEntries) {\n return [[0, 0]]\n }\n\n const entries = new Array(numEntries + 1)\n entries[0] = [0, 0]\n\n // TODO rewrite this to make an index-index that stays in memory\n const bufSize = 8 * 2 * numEntries\n if (bufSize > Number.MAX_SAFE_INTEGER) {\n throw new TypeError('integer overflow')\n }\n buf = Buffer.allocUnsafe(bufSize)\n await this.filehandle.read(buf, 0, bufSize, 8)\n for (let entryNumber = 0; entryNumber < numEntries; entryNumber += 1) {\n const compressedPosition = this._readLongWithOverflow(\n buf,\n entryNumber * 16,\n )\n const uncompressedPosition = this._readLongWithOverflow(\n buf,\n entryNumber * 16 + 8,\n )\n entries[entryNumber + 1] = [compressedPosition, uncompressedPosition]\n }\n\n return entries\n }\n\n async getLastBlock() {\n const entries = await this._getIndex()\n if (!entries.length) {\n return undefined\n }\n return entries[entries.length - 1]\n }\n\n async getRelevantBlocksForRead(length: number, position: number) {\n const endPosition = position + length\n if (length === 0) {\n return []\n }\n const entries = await this._getIndex()\n const relevant = []\n\n // binary search to find the block that the\n // read starts in and extend forward from that\n const compare = (entry: any, nextEntry: any) => {\n const uncompressedPosition = entry[UNCOMPRESSED_POSITION]\n const nextUncompressedPosition = nextEntry\n ? nextEntry[UNCOMPRESSED_POSITION]\n : Infinity\n // block overlaps read start\n if (\n uncompressedPosition <= position &&\n nextUncompressedPosition > position\n ) {\n return 0\n // block is before read start\n }\n if (uncompressedPosition < position) {\n return -1\n }\n // block is after read start\n return 1\n }\n\n let lowerBound = 0\n let upperBound = entries.length - 1\n let searchPosition = Math.floor(entries.length / 2)\n\n let comparison = compare(\n entries[searchPosition],\n entries[searchPosition + 1],\n )\n while (comparison !== 0) {\n if (comparison > 0) {\n upperBound = searchPosition - 1\n } else if (comparison < 0) {\n lowerBound = searchPosition + 1\n }\n searchPosition = Math.ceil((upperBound - lowerBound) / 2) + lowerBound\n comparison = compare(entries[searchPosition], entries[searchPosition + 1])\n }\n\n // here's where we read forward\n relevant.push(entries[searchPosition])\n let i = searchPosition + 1\n for (; i < entries.length; i += 1) {\n relevant.push(entries[i])\n if (entries[i][UNCOMPRESSED_POSITION] >= endPosition) {\n break\n }\n }\n if (relevant[relevant.length - 1][UNCOMPRESSED_POSITION] < endPosition) {\n relevant.push([])\n }\n return relevant\n }\n}\n","import { Buffer } from 'buffer'\nimport { LocalFile, GenericFilehandle } from 'generic-filehandle'\n\n// locals\nimport { unzip } from './unzip'\nimport GziIndex from './gziIndex'\n\nexport default class BgzFilehandle {\n filehandle: GenericFilehandle\n gzi: GziIndex\n\n constructor({\n filehandle,\n path,\n gziFilehandle,\n gziPath,\n }: {\n filehandle?: GenericFilehandle\n path?: string\n gziFilehandle?: GenericFilehandle\n gziPath?: string\n }) {\n if (filehandle) {\n this.filehandle = filehandle\n } else if (path) {\n this.filehandle = new LocalFile(path)\n } else {\n throw new TypeError('either filehandle or path must be defined')\n }\n\n if (!gziFilehandle && !gziPath && !path) {\n throw new TypeError('either gziFilehandle or gziPath must be defined')\n }\n\n this.gzi = new GziIndex({\n filehandle: gziFilehandle,\n path: !gziFilehandle && !gziPath && path ? gziPath : `${path}.gzi`,\n })\n }\n\n async stat() {\n const compressedStat = await this.filehandle.stat()\n return Object.assign(compressedStat, {\n size: await this.getUncompressedFileSize(),\n blocks: undefined,\n blksize: undefined,\n })\n }\n\n async getUncompressedFileSize() {\n // read the last block's ISIZE (see gzip RFC),\n // and add it to its uncompressedPosition\n const [, uncompressedPosition] = await this.gzi.getLastBlock()\n\n const { size } = await this.filehandle.stat()\n\n const buf = Buffer.allocUnsafe(4)\n // note: there should be a 28-byte EOF marker (an empty block) at\n // the end of the file, so we skip backward past that\n const { bytesRead } = await this.filehandle.read(buf, 0, 4, size - 28 - 4)\n if (bytesRead !== 4) {\n throw new Error('read error')\n }\n const lastBlockUncompressedSize = buf.readUInt32LE(0)\n return uncompressedPosition + lastBlockUncompressedSize\n }\n\n async _readAndUncompressBlock(\n blockBuffer: Buffer,\n [compressedPosition]: [number],\n [nextCompressedPosition]: [number],\n ) {\n let next = nextCompressedPosition\n if (!next) {\n next = (await this.filehandle.stat()).size\n }\n\n // read the compressed data into the block buffer\n const blockCompressedLength = next - compressedPosition\n\n await this.filehandle.read(\n blockBuffer,\n 0,\n blockCompressedLength,\n compressedPosition,\n )\n\n // uncompress it\n const unzippedBuffer = await unzip(\n blockBuffer.slice(0, blockCompressedLength),\n )\n\n return unzippedBuffer as Buffer\n }\n\n async read(buf: Buffer, offset: number, length: number, position: number) {\n // get the block positions for this read\n const blockPositions = await this.gzi.getRelevantBlocksForRead(\n length,\n position,\n )\n const blockBuffer = Buffer.allocUnsafe(32768 * 2)\n // uncompress the blocks and read from them one at a time to keep memory usage down\n let destinationOffset = offset\n let bytesRead = 0\n for (\n let blockNum = 0;\n blockNum < blockPositions.length - 1;\n blockNum += 1\n ) {\n // eslint-disable-next-line no-await-in-loop\n const uncompressedBuffer = await this._readAndUncompressBlock(\n blockBuffer,\n blockPositions[blockNum],\n blockPositions[blockNum + 1],\n )\n const [, uncompressedPosition] = blockPositions[blockNum]\n const sourceOffset =\n uncompressedPosition >= position ? 0 : position - uncompressedPosition\n const sourceEnd =\n Math.min(\n position + length,\n uncompressedPosition + uncompressedBuffer.length,\n ) - uncompressedPosition\n if (sourceOffset >= 0 && sourceOffset < uncompressedBuffer.length) {\n uncompressedBuffer.copy(buf, destinationOffset, sourceOffset, sourceEnd)\n destinationOffset += sourceEnd - sourceOffset\n bytesRead += sourceEnd - sourceOffset\n }\n }\n\n return { bytesRead, buffer: buf }\n }\n}\n"],"names":["CytobandAdapter","BaseAdapter","getData","pm","this","pluginManager","loc","getConf","uri","buffer","openLocation","readFile","buf","isGzip","unzip","TextDecoder","fatal","decode","split","filter","f","trim","map","line","i","refName","start","end","name","type","SimpleFeature","uniqueId","freeResources","async","inputData","strm","pos","chunks","inflator","totalSize","remainingInput","subarray","Inflate","push","Z_SYNC_FLUSH","err","Error","msg","next_in","result","length","avail_in","Uint8Array","offset","set","from","e","match","unzipChunkSlice","chunk","minv","maxv","cpos","blockPosition","dpos","dataPosition","cpositions","dpositions","len","origCpos","GziIndex","constructor","filehandle","path","TypeError","_readLongWithOverflow","unsigned","long","slice","greaterThan","Number","MAX_SAFE_INTEGER","lessThan","MIN_SAFE_INTEGER","toNumber","_getIndex","index","_readIndex","allocUnsafe","read","numEntries","entries","Array","bufSize","entryNumber","compressedPosition","uncompressedPosition","getLastBlock","getRelevantBlocksForRead","position","endPosition","relevant","compare","entry","nextEntry","nextUncompressedPosition","Infinity","lowerBound","upperBound","searchPosition","Math","floor","comparison","ceil","BgzFilehandle","gziFilehandle","gziPath","gzi","stat","compressedStat","Object","assign","size","getUncompressedFileSize","blocks","undefined","blksize","bytesRead","readUInt32LE","_readAndUncompressBlock","blockBuffer","nextCompressedPosition","next","blockCompressedLength","blockPositions","destinationOffset","blockNum","uncompressedBuffer","sourceOffset","sourceEnd","min","copy"],"sourceRoot":""}

Mercurial > repos > fubar > jbrowse2

annotate x/static/js/4284.61dbc58f.chunk.js.map @ 125:49f3d3878413 draft