export a div containing arabic text and highcharts divs - highcharts

Question

i am working on a php page that includes an export button to export the a div containing Arabic text labels and divs and highcharts divs, my issue is that jspdf can't export Arabic characters and using html2canvas didn't export the highcharts divs
function saveaspdf(){
html2canvas(document.getElementById(\"chart-container\"), {
onrendered: function(canvas) {
var imgData = canvas.toDataURL('image/png');
var imgWidth = 295;
var pageHeight = 210;
var imgHeight = canvas.height * imgWidth / canvas.width;
var heightLeft = imgHeight;
var doc = new jsPDF('l', 'mm');
var position = 0;
doc.addImage(imgData, 'PNG', 0, position, imgWidth, imgHeight,'','FAST');
heightLeft -= pageHeight;
while (heightLeft >= 0) {
position = heightLeft - imgHeight;
doc.addPage();
doc.addImage(imgData, 'PNG', 0, position, imgWidth, imgHeight,'','FAST');
heightLeft -= pageHeight;
}
doc.save('file.pdf');
}
});
}
the result of this code is a pdf file with no highchart and arabic characters are not showing properly

Answer 1

To create a pdf with Highcharts chart with additional content (using jspdf) you can follow these steps:
send AJAX to Highcharts server with chart options.
The return will be an URL to the image on the server.
convert the chart image from Highcharts server into a base64 format. (You can
use these approaches: https://stackoverflow.com/a/20285053/10077925)
Add chart image and your additional content to pdf using jspdf library and save
the result.
Example:
$(function() {
const toDataURL = url => fetch(url)
.then(response => response.blob())
.then(blob => new Promise((resolve, reject) => {
const reader = new FileReader()
reader.onloadend = () => resolve(reader.result)
reader.onerror = reject
reader.readAsDataURL(blob)
}))
var chartOptions = {
title: {
text: 'Solar Employment Growth by Sector, 2010-2016'
},
subtitle: {
text: 'Source: thesolarfoundation.com'
},
yAxis: {
title: {
text: 'Number of Employees'
}
},
legend: {
layout: 'vertical',
align: 'right',
verticalAlign: 'middle'
},
plotOptions: {
series: {
label: {
connectorAllowed: false
},
pointStart: 2010
}
},
series: [{
name: 'Installation',
data: [43934, 52503, 57177, 69658, 97031, 119931, 137133, 154175]
}, {
name: 'Manufacturing',
data: [24916, 24064, 29742, 29851, 32490, 30282, 38121, 40434]
}, {
name: 'Sales & Distribution',
data: [11744, 17722, 16005, 19771, 20185, 24377, 32147, 39387]
}, {
name: 'Project Development',
data: [null, null, 7988, 12169, 15112, 22452, 34400, 34227]
}, {
name: 'Other',
data: [12908, 5948, 8105, 11248, 8989, 11816, 18274, 18111]
}],
responsive: {
rules: [{
condition: {
maxWidth: 500
},
chartOptions: {
legend: {
layout: 'horizontal',
align: 'center',
verticalAlign: 'bottom'
}
}
}]
}
};
var specialElementHandlers = {
'#editor': function(element, renderer) {
return true;
}
};
$('#cmd').click(function() {
var obj = {
options: JSON.stringify(chartOptions),
type: 'image/png',
async: true
},
exportUrl = 'https://export.highcharts.com/',
imgContainer = $("#container"),
doc = new jsPDF(),
chartsLen = 1,
imgUrl;
var calls = [];
for (var i = 0; i < chartsLen; i++) {
calls.push({
type: 'post',
url: exportUrl,
data: obj,
});
}
$.when(
$.ajax(calls[0])
).done(function(c1) {
imgUrl = exportUrl + c1;
toDataURL(imgUrl)
.then(dataUrl => {
doc.setFontSize(30);
doc.text(35, 25, 'Your text here...');
doc.addImage(dataUrl, 'PNG', 15, 40);
doc.save('sample-file.pdf');
})
});
});
var chart1 = Highcharts.chart('container', chartOptions);
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script type="text/javascript" src="https://code.jquery.com/ui/1.12.0-beta.1/jquery-ui.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jspdf/1.4.1/jspdf.debug.js" integrity="sha384-THVO/sM0mFD9h7dfSndI6TS0PgAGavwKvB5hAxRRvc0o9cPLohB0wb/PTA7LdUHs" crossorigin="anonymous"></script>
<script src="https://code.highcharts.com/highcharts.js"></script>
<div id="container"></div>
<button id="cmd">generate PDF</button>
Demo:
https://jsfiddle.net/BlackLabel/r58m6h4z/