130 lines
4.8 KiB
JavaScript
130 lines
4.8 KiB
JavaScript
/* TODO: in browser attach to DOM; in node use an html parser */
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var HTML_ = (function() {
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function html_to_sheet(str/*:string*/, _opts)/*:Workbook*/ {
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var opts = _opts || {};
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if(DENSE != null && opts.dense == null) opts.dense = DENSE;
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var ws/*:Worksheet*/ = opts.dense ? ([]/*:any*/) : ({}/*:any*/);
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var i = str.indexOf("<table"), j = str.indexOf("</table");
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if(i == -1 || j == -1) throw new Error("Invalid HTML: missing <table> / </table> pair");
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var rows = str.slice(i, j).split(/(:?<tr[^>]*>)/);
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var R = -1, C = 0, RS = 0, CS = 0;
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var range = {s:{r:10000000, c:10000000},e:{r:0,c:0}};
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var merges = [], midx = 0;
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for(i = 0; i < rows.length; ++i) {
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var row = rows[i].trim();
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if(row.substr(0,3) == "<tr") { ++R; C = 0; continue; }
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if(row.substr(0,3) != "<td") continue;
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var cells = row.split("</td>");
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for(j = 0; j < cells.length; ++j) {
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var cell = cells[j].trim();
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if(cell.substr(0,3) != "<td") continue;
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var m = cell, cc = 0;
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/* TODO: parse styles etc */
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while(m.charAt(0) == "<" && (cc = m.indexOf(">")) > -1) m = m.slice(cc+1);
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while(m.indexOf(">") > -1) m = m.slice(0, m.lastIndexOf("<"));
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var tag = parsexmltag(cell.slice(0, cell.indexOf(">")));
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CS = tag.colspan ? +tag.colspan : 1;
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if((RS = +tag.rowspan)>0 || CS>1) merges.push({s:{r:R,c:C},e:{r:R + (RS||1) - 1, c:C + CS - 1}});
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/* TODO: generate stub cells */
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if(!m.length) { C += CS; continue; }
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m = unescapexml(m).replace(/[\r\n]/g,"");
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if(range.s.r > R) range.s.r = R;
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if(range.e.r < R) range.e.r = R;
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if(range.s.c > C) range.s.c = C;
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if(range.e.c < C) range.e.c = C;
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if(opts.dense) {
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if(!ws[R]) ws[R] = [];
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if(Number(m) == Number(m)) ws[R][C] = {t:'n', v:+m};
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else ws[R][C] = {t:'s', v:m};
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} else {
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var coord/*:string*/ = encode_cell({r:R, c:C});
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/* TODO: value parsing */
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if(Number(m) == Number(m)) ws[coord] = {t:'n', v:+m};
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else ws[coord] = {t:'s', v:m};
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}
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C += CS;
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}
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}
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ws['!ref'] = encode_range(range);
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return ws;
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}
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function html_to_book(str/*:string*/, opts)/*:Workbook*/ {
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return sheet_to_workbook(html_to_sheet(str, opts), opts);
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}
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function make_html_row(ws/*:Worksheet*/, r/*:Range*/, R/*:number*/, o)/*:string*/ {
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var M = (ws['!merges'] ||[]);
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var oo = [];
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for(var C = r.s.c; C <= r.e.c; ++C) {
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var RS = 0, CS = 0;
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for(var j = 0; j < M.length; ++j) {
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if(M[j].s.r > R || M[j].s.c > C) continue;
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if(M[j].e.r < R || M[j].e.c < C) continue;
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if(M[j].s.r < R || M[j].s.c < C) { RS = -1; break; }
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RS = M[j].e.r - M[j].s.r + 1; CS = M[j].e.c - M[j].s.c + 1; break;
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}
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if(RS < 0) continue;
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var coord = encode_cell({r:R,c:C});
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var cell = o.dense ? (ws[R]||[])[C] : ws[coord];
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if(!cell || cell.v == null) { oo.push("<td></td>"); continue; }
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/* TODO: html entities */
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var w = cell.h || escapexml(cell.w || (format_cell(cell), cell.w) || "");
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var sp = {};
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if(RS > 1) sp.rowspan = RS;
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if(CS > 1) sp.colspan = CS;
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oo.push(writextag('td', w, sp));
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}
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return "<tr>" + oo.join("") + "</tr>";
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}
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function sheet_to_html(ws/*:Worksheet*/, opts)/*:string*/ {
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var o/*:Array<string>*/ = [];
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var r = decode_range(ws['!ref']);
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o.dense = Array.isArray(ws);
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for(var R = r.s.r; R <= r.e.r; ++R) o.push(make_html_row(ws, r, R, o));
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return "<html><body><table>" + o.join("") + "</table></body></html>";
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}
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return {
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to_workbook: html_to_book,
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to_sheet: html_to_sheet,
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_row: make_html_row,
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from_sheet: sheet_to_html
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};
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})();
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function parse_dom_table(table/*:HTMLElement*/, _opts/*:?any*/)/*:Worksheet*/ {
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var opts = _opts || {};
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if(DENSE != null) opts.dense = DENSE;
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var ws/*:Worksheet*/ = opts.dense ? ([]/*:any*/) : ({}/*:any*/);
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var rows = table.getElementsByTagName('tr');
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var range = {s:{r:0,c:0},e:{r:rows.length - 1,c:0}};
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var merges = [], midx = 0;
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var R = 0, _C = 0, C = 0, RS = 0, CS = 0;
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for(; R < rows.length; ++R) {
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var row = rows[R];
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var elts = row.children;
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for(_C = C = 0; _C < elts.length; ++_C) {
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var elt = elts[_C], v = elts[_C].innerText;
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for(midx = 0; midx < merges.length; ++midx) {
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var m = merges[midx];
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if(m.s.c == C && m.s.r <= R && R <= m.e.r) { C = m.e.c+1; midx = -1; }
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}
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/* TODO: figure out how to extract nonstandard mso- style */
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CS = +elt.getAttribute("colspan") || 1;
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if((RS = +elt.getAttribute("rowspan"))>0 || CS>1) merges.push({s:{r:R,c:C},e:{r:R + (RS||1) - 1, c:C + CS - 1}});
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var o = {t:'s', v:v};
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if(v != null && v.length && !isNaN(Number(v))) o = {t:'n', v:Number(v)};
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if(opts.dense) { if(!ws[R]) ws[R] = []; ws[R][C] = o; }
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else ws[encode_cell({c:C, r:R})] = o;
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if(range.e.c < C) range.e.c = C;
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C += CS;
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}
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}
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ws['!merges'] = merges;
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ws['!ref'] = encode_range(range);
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return ws;
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}
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function table_to_book(table/*:HTMLElement*/, opts/*:?any*/)/*:Workbook*/ {
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return sheet_to_workbook(parse_dom_table(table, opts), opts);
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}
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