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Implement POC for image embedding

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This commit is contained in:
Marcel Greter 2016-11-29 10:30:53 +01:00
parent 53f7f6d944
commit f5721e4027
1 changed files with 55 additions and 0 deletions
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55
xlsx.js
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@ -2435,6 +2435,8 @@ var CTYPE_XML_ROOT = writextag('Types', null, {
var CTYPE_DEFAULTS = [
['xml', 'application/xml'],
['png', 'image/png'],
['jpg', 'image/jpeg'],
['bin', 'application/vnd.ms-excel.sheet.binary.macroEnabled.main'],
['rels', type2ct.rels[0]]
].map(function(x) {
@ -2476,6 +2478,7 @@ function write_ct(ct, opts) {
f3('themes');
['strs', 'styles'].forEach(f1);
['coreprops', 'extprops', 'custprops'].forEach(f3);
o[o.length] = '<Override PartName="/xl/drawings/drawing1.xml" ContentType="application/vnd.openxmlformats-officedocument.drawing+xml"/>';
if(o.length>2){ o[o.length] = ('</Types>'); o[1]=o[1].replace("/>",">"); }
return o.join("");
}
@ -2529,6 +2532,39 @@ var RELS_ROOT = writextag('Relationships', null, {
'xmlns': XMLNS.RELS
});
var DRAW_ROOT = writextag('xdr:wsDr', null, {
'xmlns:xdr': 'http://schemas.openxmlformats.org/drawingml/2006/spreadsheetDrawing',
'xmlns:a': 'http://schemas.openxmlformats.org/drawingml/2006/main'
//'xmlns:ns0': XMLNS.RELS,
// 'xmlns': XMLNS.RELS
});
function write_drawing(images) {
var o = [];
o[o.length] = (XML_HEADER);
o[o.length] = (DRAW_ROOT);
for (var i = 0; i < images.length; i++) {
var image = images[i];
var pos = image.position || {};
if (pos.type === 'twoCellAnchor') {
var from = pos.from || {}, to = pos.to || {},
fromCol = from.col || 0, toCol = to.col || 0,
fromRow = from.row || 0, toRow = to.row || 0;
var twoCell = '<xdr:from><xdr:col>'+fromCol+'</xdr:col><xdr:colOff>0</xdr:colOff><xdr:row>'+fromRow+'</xdr:row><xdr:rowOff>0</xdr:rowOff></xdr:from>';
twoCell += '<xdr:to><xdr:col>'+toCol+'</xdr:col><xdr:colOff>0</xdr:colOff><xdr:row>'+toRow+'</xdr:row><xdr:rowOff>99999</xdr:rowOff></xdr:to>';
twoCell += '<xdr:pic><xdr:nvPicPr><xdr:cNvPr id="'+(i+1)+'" name="'+image.name+'">'
twoCell += '</xdr:cNvPr><xdr:cNvPicPr><a:picLocks noChangeAspect="1"/></xdr:cNvPicPr></xdr:nvPicPr>';
twoCell += '<xdr:blipFill><a:blip xmlns:r="http://schemas.openxmlformats.org/officeDocument/2006/relationships" r:embed="rId1"/>';
twoCell += '<a:stretch><a:fillRect/></a:stretch></xdr:blipFill><xdr:spPr><a:prstGeom prst="rect"><a:avLst/></a:prstGeom></xdr:spPr></xdr:pic><xdr:clientData/>';
o[o.length] = (writextag('xdr:twoCellAnchor', twoCell, images[0].attrs));
}
}
if(o.length>2){ o[o.length] = ('</xdr:wsDr>'); o[1]=o[1].replace("/>",">"); }
return o.join("");
}
/* TODO */
function write_rels(rels) {
var o = [];
@ -7562,6 +7598,9 @@ function write_ws_xml(idx, opts, wb) {
if(ws['!merges'] !== undefined && ws['!merges'].length > 0) o[o.length] = (write_ws_xml_merges(ws['!merges']));
var images = ws['!images'] || [];
if (images.length) o[o.length] = '<drawing r:id="rId1"/>';
if(o.length>2) { o[o.length] = ('</worksheet>'); o[1]=o[1].replace("/>",">"); }
return o.join("");
}
@ -11277,6 +11316,9 @@ function add_rels(rels, rId, f, type, relobj) {
rels[('/' + relobj.Target).replace("//","/")] = relobj;
}
RELS.IMG = "http://schemas.openxmlformats.org/officeDocument/2006/relationships/image";
RELS.DRAW = "http://schemas.openxmlformats.org/officeDocument/2006/relationships/drawing";
function write_zip(wb, opts) {
if(wb && !wb.SSF) {
wb.SSF = SSF.get_table();
@ -11324,6 +11366,19 @@ function write_zip(wb, opts) {
add_rels(opts.rels, 1, f, RELS.WB);
for(rId=1;rId <= wb.SheetNames.length; ++rId) {
var s = wb.SheetNames[rId-1], ws = wb.Sheets[s],
images = ws['!images'] || [];
var rels = ws['!rels'] = [], draw_rels = [];
for (var sId=1; sId <= images.length; ++sId) {
var image = images[sId - 1];
f = 'xl/media/' + image.name;
zip.file(f, image.data, image.opts);
add_rels(draw_rels, sId, "../media/" + image.name, RELS.IMG);
}
zip.file("xl/drawings/drawing" + rId + "." + wbext, write_drawing(images));
add_rels(rels, rId, "../drawings/drawing" + rId + "." + wbext, RELS.DRAW);
zip.file("xl/drawings/_rels/drawing" + rId + "." + wbext + ".rels", write_rels(draw_rels));
zip.file("xl/worksheets/_rels/sheet" + rId + "." + wbext + '.rels', write_rels(rels));
f = "xl/worksheets/sheet" + rId + "." + wbext;
zip.file(f, write_ws(rId-1, f, opts, wb));
ct.sheets.push(f);