sheetjs/bits/31_rels.js

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/* 9.3 Relationships */
var RELS = ({
WB: "http://schemas.openxmlformats.org/officeDocument/2006/relationships/officeDocument",
SHEET: "http://sheetjs.openxmlformats.org/officeDocument/2006/relationships/officeDocument",
HLINK: "http://schemas.openxmlformats.org/officeDocument/2006/relationships/hyperlink",
VML: "http://schemas.openxmlformats.org/officeDocument/2006/relationships/vmlDrawing",
VBA: "http://schemas.microsoft.com/office/2006/relationships/vbaProject"
}/*:any*/);
/* 9.3.3 Representing Relationships */
function get_rels_path(file/*:string*/)/*:string*/ {
var n = file.lastIndexOf("/");
return file.substr(0,n+1) + '_rels/' + file.substr(n+1) + ".rels";
}
function parse_rels(data/*:?string*/, currentFilePath/*:string*/) {
if (!data) return data;
if (currentFilePath.charAt(0) !== '/') {
currentFilePath = '/'+currentFilePath;
}
var rels = {};
var hash = {};
(data.match(tagregex)||[]).forEach(function(x) {
var y = parsexmltag(x);
/* 9.3.2.2 OPC_Relationships */
if (y[0] === '<Relationship') {
var rel = {}; rel.Type = y.Type; rel.Target = y.Target; rel.Id = y.Id; rel.TargetMode = y.TargetMode;
var canonictarget = y.TargetMode === 'External' ? y.Target : resolve_path(y.Target, currentFilePath);
rels[canonictarget] = rel;
hash[y.Id] = rel;
}
});
rels["!id"] = hash;
return rels;
}
XMLNS.RELS = 'http://schemas.openxmlformats.org/package/2006/relationships';
var RELS_ROOT = writextag('Relationships', null, {
//'xmlns:ns0': XMLNS.RELS,
'xmlns': XMLNS.RELS
});
/* TODO */
function write_rels(rels)/*:string*/ {
var o = [XML_HEADER, RELS_ROOT];
keys(rels['!id']).forEach(function(rid) {
o[o.length] = (writextag('Relationship', null, rels['!id'][rid]));
});
if(o.length>2){ o[o.length] = ('</Relationships>'); o[1]=o[1].replace("/>",">"); }
return o.join("");
}
function add_rels(rels, rId, f, type, relobj)/*:number*/ {
if(!relobj) relobj = {};
if(!rels['!id']) rels['!id'] = {};
if(rId < 0) for(rId = 1; rels['!id']['rId' + rId]; ++rId){}
relobj.Id = 'rId' + rId;
relobj.Type = type;
relobj.Target = f;
if(relobj.Type == RELS.HLINK) relobj.TargetMode = "External";
if(rels['!id'][relobj.Id]) throw new Error("Cannot rewrite rId " + rId);
rels['!id'][relobj.Id] = relobj;
rels[('/' + relobj.Target).replace("//","/")] = relobj;
return rId;
}