MediaWiki:D3graphviz.js
Revision as of 09:23, 1 May 2022 by Simon Stier (talk | contribs)
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$(document).ready(function() {
$.getScript('//d3js.org/d3.v5.min.js').done(function() {
$.getScript('//unpkg.com/@hpcc-js/wasm@0.3.11/dist/index.min.js').done(function() {
$.getScript('//unpkg.com/d3-graphviz@3.2.0/build/d3-graphviz.js').done(function() {
$.getScript('https://unpkg.com/canvg@3.0.7/lib/umd.js').done(function() {
/*The print functions display the PNG file when printing and reset the PNG file to the SVG file after printing.*/
window.onbeforeprint = (event) => {
var allGraphViz = $(".graphviz");
var allGraphVizPrint = $(".graphviz-print > div.printonly");
var allGraphVizNoPrint = $(".graphviz-print > div.noprint");
for (var i = 0; i < allGraphViz.length; i++) {
allGraphViz[i].style.display = "none";
}
for (var i = 0; i < allGraphVizNoPrint.length; i++) {
allGraphVizNoPrint[i].style.display = "none";
}
for (var i = 0; i < allGraphVizPrint.length; i++) {
allGraphVizPrint[i].style.display = "block";
}
};
window.onafterprint = function(event) {
var allGraphViz = $(".graphviz");
var allGraphVizPrint = $(".graphviz-print > div.printonly");
var allGraphVizNoPrint = $(".graphviz-print > div.noprint");
for (var i = 0; i < allGraphViz.length; i++) {
allGraphViz[i].style.display = "block";
}
for (var i = 0; i < allGraphVizNoPrint.length; i++) {
allGraphVizNoPrint[i].style.display = "block";
}
for (var i = 0; i < allGraphVizPrint.length; i++) {
allGraphVizPrint[i].style.display = "none";
}
};
/*The svgToPng () function converts an SVG into a PNG and attaches the PNG to the .printonly class <div> and the svg to the .noprint class <div>.*/
var wait = 0;
function svgToPng() {
wait++;
if (wait < $(".graphviz-print").length) {
return;
}
$(".graphviz-print > svg").each(function(index) {
var canvas = document.createElement("canvas");
canvas.width = this.width;
var ctx = canvas.getContext('2d');
var svgData = new XMLSerializer().serializeToString(this);
v = canvg.Canvg.fromString(ctx, svgData);
// Start SVG rendering with animations and mouse handling.
v.start();
var imgPng = canvas.toDataURL( "image/png", 1.0 );
var img = new Image();
img.setAttribute("src", imgPng );
img.style.width = "100%";
//img.style.height = "600px";
var noprint = document.createElement("div");
noprint.classList.add("noprint");
var printonly = document.createElement("div");
printonly.classList.add("printonly");
$(this).parent().append(noprint);
$(this).parent().append(printonly);
noprint.append(this);
printonly.append(img);
$(".noprint").css('display', 'block');
$(".printonly").css('display', 'none');
});
}
/*Draws the given graph as SVG in the .graphviz or .graphviz-print <div>.*/
function startDrawingSVG() {
if ($('.graphviz').length > 0 ) {
$(".graphviz").each(function(index) {
var innerHtml = $(this).text();
$(this).text("");
if (innerHtml.match(/digraph./)) {
d3.select(this).graphviz().width('100%').fit(true).zoom(false)
.renderDot('' + innerHtml + '');
}
$(".graphviz > p").css('display', 'none');
$('.graphviz').css('display', 'block');
$(".graphviz > pre").css('display', 'none');
});
}
if($('.graphviz-print').length > 0){
$(".graphviz-print").each(function(index) {
var innerHtml = $(this).text();
$(this).text("");
if (innerHtml.match(/digraph./)) {
d3.select(this).graphviz().width('100%').fit(true).zoom(false)
.renderDot('' + innerHtml + '', svgToPng);
}
$(".graphviz-print > p").css('display', 'none');
$('.graphviz-print').css('display', 'block');
$(".graphviz-print > pre").css('display', 'none');
});
}
}
startDrawingSVG();
/*The SVG zoom only works when the shift key is pressed.*/
$(document).keydown(function(e) {
if (e.keyCode == 16) {
$(".graphviz").each(function(index) {
d3.select(this).graphviz().width('100%').fit(true).zoom(true)
});
$(".noprint").each(function(index) {
d3.select(this).graphviz().width('100%').fit(true).zoom(true)
});
}
});
/**/
$(document).keyup(function(e) {
if (e.keyCode == 16) {
$(".graphviz").each(function(index) {
d3.select(this).graphviz().width('100%').fit(true).zoom(false)
});
$(".noprint").each(function(index) {
d3.select(this).graphviz().width('100%').fit(true).zoom(false)
});
}
});
});
});
});});
});