xsheetjs/bits/45_rtf.js

77 lines
2.4 KiB
JavaScript

var RTF = (function() {
function rtf_to_sheet(d/*:RawData*/, opts)/*:Worksheet*/ {
switch(opts.type) {
case 'base64': return rtf_to_sheet_str(Base64.decode(d), opts);
case 'binary': return rtf_to_sheet_str(d, opts);
case 'buffer': return rtf_to_sheet_str(has_buf && Buffer.isBuffer(d) ? d.toString('binary') : a2s(d), opts);
case 'array': return rtf_to_sheet_str(cc2str(d), opts);
}
throw new Error("Unrecognized type " + opts.type);
}
/* TODO: this is a stub */
function rtf_to_sheet_str(str/*:string*/, opts)/*:Worksheet*/ {
var o = opts || {};
var ws/*:Worksheet*/ = o.dense ? ([]/*:any*/) : ({}/*:any*/);
var rows = str.match(/\\trowd.*?\\row\b/g);
if(!rows.length) throw new Error("RTF missing table");
var range/*:Range*/ = ({s: {c:0, r:0}, e: {c:0, r:rows.length - 1}}/*:any*/);
rows.forEach(function(rowtf, R) {
if(Array.isArray(ws)) ws[R] = [];
var rtfre = /\\\w+\b/g;
var last_index = 0;
var res;
var C = -1;
while((res = rtfre.exec(rowtf))) {
switch(res[0]) {
case "\\cell":
var data = rowtf.slice(last_index, rtfre.lastIndex - res[0].length);
if(data[0] == " ") data = data.slice(1);
++C;
if(data.length) {
// TODO: value parsing, including codepage adjustments
var cell = {v: data, t:"s"};
if(Array.isArray(ws)) ws[R][C] = cell;
else ws[encode_cell({r:R, c:C})] = cell;
}
break;
}
last_index = rtfre.lastIndex;
}
if(C > range.e.c) range.e.c = C;
});
ws['!ref'] = encode_range(range);
return ws;
}
function rtf_to_workbook(d/*:RawData*/, opts)/*:Workbook*/ { return sheet_to_workbook(rtf_to_sheet(d, opts), opts); }
/* TODO: this is a stub */
function sheet_to_rtf(ws/*:Worksheet*//*::, opts*/)/*:string*/ {
var o = ["{\\rtf1\\ansi"];
var r = safe_decode_range(ws['!ref']), cell/*:Cell*/;
var dense = Array.isArray(ws);
for(var R = r.s.r; R <= r.e.r; ++R) {
o.push("\\trowd\\trautofit1");
for(var C = r.s.c; C <= r.e.c; ++C) o.push("\\cellx" + (C+1));
o.push("\\pard\\intbl");
for(C = r.s.c; C <= r.e.c; ++C) {
var coord = encode_cell({r:R,c:C});
cell = dense ? (ws[R]||[])[C]: ws[coord];
if(!cell || cell.v == null && (!cell.f || cell.F)) continue;
o.push(" " + (cell.w || (format_cell(cell), cell.w)));
o.push("\\cell");
}
o.push("\\pard\\intbl\\row");
}
return o.join("") + "}";
}
return {
to_workbook: rtf_to_workbook,
to_sheet: rtf_to_sheet,
from_sheet: sheet_to_rtf
};
})();