229 lines
7.9 KiB
TypeScript
229 lines
7.9 KiB
TypeScript
/*! sheetjs (C) 2013-present SheetJS -- http://sheetjs.com */
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import { CFB$Container } from 'cfb';
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import { WorkBook, WorkSheet, CellAddress, Range } from '../../';
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import { u8str, u8_to_dataview } from './util';
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import { parse_shallow, varint_to_i32, parse_varint49, mappa } from './proto';
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import { deframe } from './frame';
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import { IWAArchiveInfo, IWAMessage, parse_iwa } from './iwa';
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import { parse as parse_storage } from "./cell";
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/* written here to avoid a full import of the 'xlsx' library */
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var encode_col = (C: number): string => {
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var s="";
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for(++C; C; C=Math.floor((C-1)/26)) s = String.fromCharCode(((C-1)%26) + 65) + s;
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return s;
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};
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var encode_cell = (c: CellAddress): string => `${encode_col(c.c)}${c.r+1}`;
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var encode_range = (r: Range): string => encode_cell(r.s) + ":" + encode_cell(r.e);
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var book_new = (): WorkBook => ({Sheets:{}, SheetNames:[]});
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var book_append_sheet = (wb: WorkBook, ws: WorkSheet, name?: string): void => {
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var i = 1;
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if(!name) for(; i < 9999; ++i) {
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if(wb.SheetNames.indexOf(name = `Sheet ${i}`) == -1) break;
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} else if(wb.SheetNames.indexOf(name) > -1) for(; i < 9999; ++i) {
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if(wb.SheetNames.indexOf(`${name}_${i}`) == -1) { name = `${name}_${i}`; break; }
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}
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wb.SheetNames.push(name); wb.Sheets[name] = ws;
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};
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function parse_numbers(cfb: CFB$Container): WorkBook {
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var out: IWAMessage[][] = [];
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cfb.FullPaths.forEach(p => { if(p.match(/\.iwpv2/)) throw new Error(`Unsupported password protection`); });
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/* collect entire message space */
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cfb.FileIndex.forEach(s => {
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if(!s.name.match(/\.iwa$/)) return;
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var o: Uint8Array;
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try { o = deframe(s.content as Uint8Array); } catch(e) { return console.log("?? " + s.content.length + " " + (e.message || e)); }
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var packets: IWAArchiveInfo[];
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try { packets = parse_iwa(o); } catch(e) { return console.log("## " + (e.message || e)); }
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packets.forEach(packet => {out[+packet.id] = packet.messages;});
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});
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if(!out.length) throw new Error("File has no messages");
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/* find document root */
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var docroot: IWAMessage;
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out.forEach((iwams) => {
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iwams.forEach((iwam) => {
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var mtype = varint_to_i32(iwam.meta[1][0].data) >>> 0;
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if(mtype == 1) {
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if(!docroot) docroot = iwam;
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else throw new Error("Document has multiple roots");
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}
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});
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});
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if(!docroot) throw new Error("Cannot find Document root");
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return parse_docroot(out, docroot);
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}
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export default parse_numbers;
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// .TSP.Reference
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function parse_Reference(buf: Uint8Array): number {
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var pb = parse_shallow(buf);
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return parse_varint49(pb[1][0].data);
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}
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// .TST.TableDataList
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function parse_TST_TableDataList(M: IWAMessage[][], root: IWAMessage): string[] {
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var pb = parse_shallow(root.data);
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// .TST.TableDataList.ListType
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var type = varint_to_i32(pb[1][0].data);
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var entries = pb[3];
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var data = [];
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(entries||[]).forEach(entry => {
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// .TST.TableDataList.ListEntry
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var le = parse_shallow(entry.data);
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var key = varint_to_i32(le[1][0].data)>>>0;
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switch(type) {
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case 1: data[key] = u8str(le[3][0].data); break;
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case 8: {
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// .TSP.RichTextPayloadArchive
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var rt = M[parse_Reference(le[9][0].data)][0];
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var rtp = parse_shallow(rt.data);
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// .TSWP.StorageArchive
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var rtpref = M[parse_Reference(rtp[1][0].data)][0];
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var mtype = varint_to_i32(rtpref.meta[1][0].data);
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if(mtype != 2001) throw new Error(`2000 unexpected reference to ${mtype}`);
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var tswpsa = parse_shallow(rtpref.data);
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data[key] = tswpsa[3].map(x => u8str(x.data)).join("");
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} break;
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}
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});
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return data;
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}
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interface TileRowInfo {
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R: number;
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cells?: Uint8Array[];
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}
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// .TSP.TileRowInfo
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function parse_TST_TileRowInfo(u8: Uint8Array): TileRowInfo {
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var pb = parse_shallow(u8);
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var R = varint_to_i32(pb[1][0].data) >>> 0;
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var pre_bnc = pb[3]?.[0]?.data;
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var pre_bnc_offsets = pb[4]?.[0]?.data && u8_to_dataview(pb[4][0].data);
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var storage = pb[6]?.[0]?.data;
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var storage_offsets = pb[7]?.[0]?.data && u8_to_dataview(pb[7][0].data);
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var wide_offsets = pb[8]?.[0]?.data && varint_to_i32(pb[8][0].data) > 0 || false;
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var width = wide_offsets ? 4 : 1;
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var cells = [];
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var off = 0;
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for(var C = 0; C < pre_bnc_offsets.byteLength/2; ++C) {
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/* prefer storage if it is present, otherwise fall back on pre_bnc */
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if(storage && storage_offsets) {
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off = storage_offsets.getUint16(C*2, true) * width;
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if(off < storage.length) { cells[C] = storage.subarray(off, storage_offsets.getUint16(C*2+2, true) * width); continue; }
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}
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if(pre_bnc && pre_bnc_offsets) {
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off = pre_bnc_offsets.getUint16(C*2, true) * width;
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if(off < pre_bnc.length) cells[C] = pre_bnc.subarray(off, pre_bnc_offsets.getUint16(C*2+2, true) * width);
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}
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}
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return { R, cells };
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}
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// .TST.Tile
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function parse_TST_Tile(M: IWAMessage[][], root: IWAMessage): Uint8Array[][] {
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var pb = parse_shallow(root.data);
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var ri = mappa(pb[5], parse_TST_TileRowInfo);
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return ri.reduce((acc, x) => {
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if(!acc[x.R]) acc[x.R] = [];
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x.cells.forEach((cell, C) => {
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if(acc[x.R][C]) throw new Error(`Duplicate cell r=${x.R} c=${C}`);
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acc[x.R][C] = cell;
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});
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return acc;
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}, [] as Uint8Array[][]);
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}
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// .TST.TableModelArchive
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function parse_TST_TableModelArchive(M: IWAMessage[][], root: IWAMessage, ws: WorkSheet) {
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var pb = parse_shallow(root.data);
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var range: Range = { s: {r:0, c:0}, e: {r:0, c:0} };
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range.e.r = (varint_to_i32(pb[6][0].data) >>> 0) - 1;
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if(range.e.r < 0) throw new Error(`Invalid row varint ${pb[6][0].data}`);
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range.e.c = (varint_to_i32(pb[7][0].data) >>> 0) - 1;
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if(range.e.c < 0) throw new Error(`Invalid col varint ${pb[7][0].data}`);
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ws["!ref"] = encode_range(range);
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{
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// .TST.DataStore
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var store = parse_shallow(pb[4][0].data);
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var sst = parse_TST_TableDataList(M, M[parse_Reference(store[4][0].data)][0]);
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var rsst: string[] = store[17]?.[0] ? parse_TST_TableDataList(M, M[parse_Reference(store[17][0].data)][0]) : [];
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{
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// .TST.TileStorage
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var tile = parse_shallow(store[3][0].data);
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var tiles: Array<{id: number, ref: Uint8Array[][]}> = [];
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tile[1].forEach(t => {
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var tl = (parse_shallow(t.data));
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var ref = M[parse_Reference(tl[2][0].data)][0];
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var mtype = varint_to_i32(ref.meta[1][0].data);
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if(mtype != 6002) throw new Error(`6001 unexpected reference to ${mtype}`);
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tiles.push({id: varint_to_i32(tl[1][0].data), ref: parse_TST_Tile(M, ref) });
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});
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tiles.forEach((tile) => {
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tile.ref.forEach((row, R) => {
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row.forEach((buf, C) => {
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var addr = encode_cell({r:R,c:C});
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var res = parse_storage(buf, sst, rsst);
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if(res) ws[addr] = res;
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});
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});
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});
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}
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}
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}
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// .TST.TableInfoArchive
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function parse_TST_TableInfoArchive(M: IWAMessage[][], root: IWAMessage): WorkSheet {
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var pb = parse_shallow(root.data);
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var out: WorkSheet = { "!ref": "A1" };
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var tableref = M[parse_Reference(pb[2][0].data)];
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var mtype = varint_to_i32(tableref[0].meta[1][0].data);
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if(mtype != 6001) throw new Error(`6000 unexpected reference to ${mtype}`);
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parse_TST_TableModelArchive(M, tableref[0], out);
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return out;
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}
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// .TN.SheetArchive
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interface NSheet {
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name: string;
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sheets: WorkSheet[];
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}
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function parse_sheetroot(M: IWAMessage[][], root: IWAMessage): NSheet {
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var pb = parse_shallow(root.data);
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var out: NSheet = {
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name: (pb[1]?.[0] ? u8str(pb[1][0].data) : ""),
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sheets: []
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};
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var shapeoffs = mappa(pb[2], parse_Reference);
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shapeoffs.forEach((off) => {
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M[off].forEach((m: IWAMessage) => {
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var mtype = varint_to_i32(m.meta[1][0].data);
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if(mtype == 6000) out.sheets.push(parse_TST_TableInfoArchive(M, m));
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});
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});
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return out;
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}
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// .TN.DocumentArchive
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function parse_docroot(M: IWAMessage[][], root: IWAMessage): WorkBook {
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var out = book_new();
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var pb = parse_shallow(root.data);
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var sheetoffs = mappa(pb[1], parse_Reference);
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sheetoffs.forEach((off) => {
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M[off].forEach((m: IWAMessage) => {
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var mtype = varint_to_i32(m.meta[1][0].data);
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if(mtype == 2) {
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var root = parse_sheetroot(M, m);
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root.sheets.forEach(sheet => { book_append_sheet(out, sheet, root.name); });
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}
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});
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});
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if(out.SheetNames.length == 0) throw new Error("Empty NUMBERS file");
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return out;
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}
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