exceljs
Version:
Excel Workbook Manager - Read and Write xlsx and csv Files.
283 lines (260 loc) • 8.97 kB
JavaScript
/**
* Copyright (c) 2015 Guyon Roche
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
*/
'use strict';
var utils = require('../../../utils/utils');
var BaseXform = require('../base-xform');
var Enums = require('../../../doc/enums');
var RelType = require('../../rel-type');
function getValueType(v) {
if ((v === null) || (v === undefined)) {
return Enums.ValueType.Null;
} else if ((v instanceof String) || (typeof v === 'string')) {
return Enums.ValueType.String;
} else if (typeof v === 'number') {
return Enums.ValueType.Number;
} else if (v instanceof Date) {
return Enums.ValueType.Date;
} else if (v.text && v.hyperlink) {
return Enums.ValueType.Hyperlink;
} else if (v.formula) {
return Enums.ValueType.Formula;
} else {
throw new Error('I could not understand type of value');
}
}
function getEffectiveCellType(cell) {
switch (cell.type) {
case Enums.ValueType.Formula:
return getValueType(cell.result);
default:
return cell.type;
}
}
var CellXform = module.exports = function() {
};
utils.inherits(CellXform, BaseXform, {
get tag() { return 'c'; },
prepare: function(model, options) {
var styleId = options.styles.addStyleModel(model.style || {}, getEffectiveCellType(model));
if (styleId) {
model.styleId = styleId;
}
switch(model.type) {
case Enums.ValueType.String:
if (options.sharedStrings) {
model.ssId = options.sharedStrings.add(model.value);
}
break;
case Enums.ValueType.Hyperlink:
if (options.sharedStrings) {
model.ssId = options.sharedStrings.add(model.text);
}
var hyperlinkId = options.hyperlinks.length + 1;
options.hyperlinks.push({
address: model.address,
rId: 'rId' + hyperlinkId,
type: RelType.Hyperlink,
target: model.hyperlink,
targetMode: 'External'
});
break;
case Enums.ValueType.Merge:
options.merges.add(model);
break;
}
},
render: function(xmlStream, model) {
xmlStream.openNode('c');
xmlStream.addAttribute('r', model.address);
if (model.styleId) {
xmlStream.addAttribute('s', model.styleId);
}
switch (model.type) {
case Enums.ValueType.Number:
xmlStream.leafNode('v', null, model.value);
break;
case Enums.ValueType.String:
if (model.ssId !== undefined) {
xmlStream.addAttribute('t', 's');
xmlStream.leafNode('v', null, model.ssId);
} else {
xmlStream.addAttribute('t', 'str');
xmlStream.leafNode('v', null, model.value);
}
break;
case Enums.ValueType.Date:
xmlStream.leafNode('v', null, utils.dateToExcel(model.value));
break;
case Enums.ValueType.Hyperlink:
if (model.ssId !== undefined) {
xmlStream.addAttribute('t', 's');
xmlStream.leafNode('v', null, model.ssId);
} else {
xmlStream.addAttribute('t', 'str');
xmlStream.leafNode('v', null, model.text);
}
break;
case Enums.ValueType.Formula:
switch (getValueType(model.result)) {
case Enums.ValueType.Null: // ?
xmlStream.leafNode('f', null, model.formula);
break;
case Enums.ValueType.String:
// oddly, formula results don't ever use shared strings
xmlStream.addAttribute('t', 'str');
xmlStream.leafNode('f', null, model.formula);
xmlStream.leafNode('v', null, model.result);
break;
case Enums.ValueType.Number:
xmlStream.leafNode('f', null, model.formula);
xmlStream.leafNode('v', null, model.result);
break;
case Enums.ValueType.Date:
xmlStream.leafNode('f', null, model.formula);
xmlStream.leafNode('v', null, utils.dateToExcel(model.result));
break;
// case Enums.ValueType.Hyperlink: // ??
// case Enums.ValueType.Formula:
default:
throw new Error('I could not understand type of value');
}
break;
case Enums.ValueType.Merge:
// nothing to add
break;
}
xmlStream.closeNode(); //</c>
},
parseOpen: function(node) {
switch(node.name) {
case 'c':
//var address = colCache.decodeAddress(node.attributes.r);
var model = this.model = {
address: node.attributes.r
};
this.t = node.attributes.t;
if (node.attributes.s) {
model.styleId = parseInt(node.attributes.s);
}
return true;
case 'f':
this.currentNode = 'f';
return true;
case 'v':
this.currentNode = 'v';
return true;
default:
return false;
}
},
parseText: function(text) {
switch(this.currentNode) {
case 'f':
this.model.formula = this.model.formula ? this.model.formula + text : text;
break;
case 'v':
this.model.value = this.model.value ? this.model.value + text : text;
break;
}
},
parseClose: function(name) {
switch(name) {
case 'c':
var model = this.model;
// first guess on cell type
if (model.formula) {
model.type = Enums.ValueType.Formula;
if (model.value) {
if (this.t === 'str') {
model.result = utils.xmlDecode(model.value);
} else {
model.result = parseFloat(model.value);
}
model.value = undefined;
}
} else if (model.value !== undefined) {
switch (this.t) {
case 's':
model.type = Enums.ValueType.String;
model.value = parseInt(model.value);
break;
case 'str':
model.type = Enums.ValueType.String;
model.value = utils.xmlDecode(model.value);
break;
default:
model.type = Enums.ValueType.Number;
model.value = parseFloat(model.value);
break;
}
} else {
model.type = Enums.ValueType.Merge;
}
return false;
case 'f':
case 'v':
this.currentNode = undefined;
return true;
default:
return false;
}
},
reconcile: function(model, options) {
var style = model.styleId && options.styles.getStyleModel(model.styleId);
if (style) {
model.style = style;
}
if (model.styleId !== undefined) {
model.styleId = undefined;
}
switch (model.type) {
case Enums.ValueType.String:
if (typeof model.value === 'number') {
model.value = options.sharedStrings.getString(model.value);
}
if (model.value.richText) {
model.type = Enums.ValueType.RichText;
}
break;
case Enums.ValueType.Number:
if (style && utils.isDateFmt(style.numFmt)) {
model.type = Enums.ValueType.Date;
model.value = utils.excelToDate(model.value);
}
break;
case Enums.ValueType.Formula:
if ((model.result !== undefined) && style && utils.isDateFmt(style.numFmt)) {
model.result = utils.excelToDate(model.result);
}
break;
}
// look for hyperlink
var hyperlink = options.hyperlinkMap.getHyperlink(model.address);
if (hyperlink) {
model.type = Enums.ValueType.Hyperlink;
model.text = model.value;
model.value = undefined;
model.hyperlink = hyperlink;
}
}
});