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<!DOCTYPE html>
<html>
<head>
<!-- Using GlowScript locally, based on the work of Vesa Lappalainen vesal@jyu.fi -->
<title>GlowScript Offline</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<style>
.api {
height: 5000px;
border: 1px solid #ddd;
border-radius: 4px;
}
.split p {
padding: 20px;
}
.split {
-webkit-box-sizing: border-box;
-moz-box-sizing: border-box;
box-sizing: border-box;
overflow-y: auto;
overflow-x: hidden;
}
.gutter {
background-color: #ccc;
background-repeat: no-repeat;
background-position: 50%;
}
.gutter.gutter-horizontal {
cursor: ew-resize;
}
.split.split-horizontal, .gutter.gutter-horizontal {
height: 100%;
float: left;
}
</style>
</head>
<body class="GlowScriptBody">
<link type="text/css" href="glowscript_libraries/jquery-ui.custom.css" rel="stylesheet" />
<link type="text/css" href="glowscript_libraries/ide.css" rel="stylesheet" />
<script type="text/javascript" src="glowscript_libraries/jquery.min.js"></script>
<script type="text/javascript" src="glowscript_libraries/jquery-ui.custom.min.js"></script>
<script type="text/javascript" src="glowscript_libraries/editor.js"></script>
<script type="text/javascript" src="glowscript_libraries/RSrun.3.0.min.js"></script>
<script type="text/javascript" src="glowscript_libraries/glow.3.0.min.js" charset="UTF-8"></script>
<script type="text/javascript" src="glowscript_libraries/split.min.js"></script>
<script type="text/javascript" src="glowscript_libraries/Roboto_Medium_ttf_sans.js"></script>
<script type="text/javascript" src="glowscript_libraries/NimbusRomNo9L_Med_otf_serif.js"></script>
</body>
<button onclick="runCode()">Run</button>
<button onclick="saveCode()">Save</button>
<a href="VPythonDocs/index.html" target="_blank">Help</a>
<button id="export" onclick="exportCode()">Export</button>
<input type="file" id="read_local_file"/>
<script>
var gsversion = '3.0'
var printpane = false
var exporting = false // not currently in export mode
var lastprintwidth = null
var glowscript_run = undefined
window.Jupyter_VPython = undefined
if (!navigator.onLine) window.Jupyter_VPython = 'glowscript_data/' // get textures when offline
// TAB at end of line should lengthen the line; implement Ctrl-1 and Ctrl-2
// localCompile is a modification of https://github.com/vpython/glowscript/blob/master/ide/ide.js
function localCompile(header, compReady, errordiv) {
header.source = 'GlowScript '+gsversion+' VPython\n'+header.source
errordiv.innerHTML = ""
var compiler_url
if (header.lang == 'vpython') {
compiler_url = "glowscript_libraries/RScompiler." + header.version + ".min.js"
} else compiler_url = "glowscript_libraries/compiler." + header.version + ".min.js"
window.glowscript_compile = undefined
$.ajax({
url: compiler_url,
dataType: "script",
cache: true,
crossDomain: true // use script tag rather than xhr
}).fail(function (xhr, err, exc) {
(xhr)
alert(err + " getting " + xhr.url + ": " + exc)
}).done(function () {
if (!window.glowscript_compile) {
alert("Failed to load compiler from " + compiler_url)
return
}
var embedScript
try {
embedScript = window.glowscript_compile(header.source, {lang: header.lang,
version: header.version.substr(0,3)})
} catch(err) { // need to decrement 3 -> 2 in Error: Missing right parenthesis, see line 3: b = box(pos=37
err = err.toString() // gets the error message
var patt = new RegExp('line(\\s*)([0-9]*):')
var m = err.match(patt)
if (m !== null) {
var colonindex = m.index + 4 + m[1].length + m[2].length
var n = parseFloat(m[2])-1
err = err.slice(0,m.index)+'line '+n+err.slice(colonindex)
}
errordiv.innerHTML = "<p>"+err+"</p>"
return
}
compReady(embedScript)
})
}
function parseVersionHeader( source ) {
var sourceLines = source.split("\n")
var header = sourceLines[0]
// Remove a newline or similar character at the end of header:
if (header.charCodeAt(header.length-1) < 32)
header = header.substring(0,header.length-1)
var rest = source.substring( header.length+1 )
var ret = {
version: null,
lang: '', // 'vpython' (default) or 'rapydscript' or 'javascript' or a string that is neither (e.g. when editing header)
source: rest,
ok: false,
unpackaged: false,
isCurrent: false
}
header = header.split(" ")
if (header.length === undefined) return ret
if (header[0] == ' ') return ret
var elements = []
for (var i=0; i<header.length; i++) { // remove empty strings corresponding to spaces
if (header[i] != '') elements.push(header[i])
}
if (elements.length < 2 || elements.length > 3) return ret
if (elements[0] != 'GlowScript') return ret
ret.lang = 'javascript' // the default if no language is specified
if (elements.length == 3) {
ret.lang = elements[2].toLowerCase()
if (!(ret.lang == 'javascript' || ret.lang == 'vpython')) return ret
}
var ver = elements[1]
if (ver != gsversion) alert('The version number, '+ver+', should be '+gsversion)
var okv = true
return {
version: ver,
lang: ret.lang,
source: rest,
}
}
function getHeader(exporting) {
var text = GSedit.getValue()
var end = text.indexOf('\n')
var i = text.slice(0,end).indexOf("GlowScript") // Look for "GlowScipt" in first line
var j = text.slice(0,end).indexOf("vpython") // Look for "vpython" in first line
if (i < 0 && j) text = "GlowScript "+gsversion+" VPython" + "\n" + text
var header = parseVersionHeader(text)
printpane = false
if (header.source.search(/print\s*\(/) >= 0) { // if the program uses print() or GSprint(), expand 3rd pane
printpane = true
if (!exporting) {
var end = header.source.indexOf('\n')
var insert
var w = (lastprintwidth === null) ? 300 : 0.01*lastprintwidth*window.innerWidth
if (header.lang == 'vpython')
insert = "print_options(place=$('#printing'), width="+w+", height=window.innerHeight, clear=True)\n"
else insert = "print_options({place:$('#printing'), width:"+w+", height:window.innerHeight, clear:true})\n"
header.source = insert + header.source
}
}
// Look for mention of MathJax in program and attempt to get it (need internet access; files too big to include in package)
if (header.source.indexOf('MathJax') >= 0) {
alert('Cannot currently use MathJax in GlowScript Offline.')
}
return header
}
var gsErrordiv
var savecode = null
function runCode() {
var header = getHeader(false)
splitAdjust()
gsErrordiv = $("#gserrors")[0]
localCompile(header, ready, gsErrordiv, false)
}
async function runprog(prog) {
try {
eval(prog)
await __main__()
} catch(err) {
reportScriptError(prog, err)
}
}
function ready(program) {
var w = $("#glows")
w[0].innerHTML = "" // Comment this and the next if get a solution for too many WebGL contexts
w[0].innerHTML = '<div id="glowscript" class="glowscript"></div>'
window.__context = { glowscript_container: $("#glowscript") }
runprog(program)
}
function exportCode() {
if (savecode !== null) { // Restore operation
exporting = false
GSedit.setValue(savecode)
savecode = null
$("#export").html('Export')
} else { // Export operation
exporting = true
var header = getHeader(true)
gsErrordiv = $("#gserrors")[0]
localCompile(header, showcode, gsErrordiv)
}
}
function showcode(sc) {
// In creating the string embedHTML it was necessary to break 'script' into 'scr'+'ipt' to avoid problems parsing GlowScript.html
var exporturl = "https://s3.amazonaws.com/glowscript/"
var verdir = '2.1'
var divid = "glowscript"
var embedHTML = (
'<div id="' + divid + '" class="glowscript">\n' +
'<meta http-equiv="Content-Type" content="text/html; charset=utf-8">' +
'<link type="text/css" href="'+exporturl+'css/redmond/' + verdir + '/jquery-ui.custom.css" rel="stylesheet" />\n' +
'<link type="text/css" href="' + exporturl + 'css/ide.css" rel="stylesheet" />\n' +
'<scr'+'ipt type="text/javascript" src="' + exporturl + 'lib/jquery/' + verdir + '/jquery.min.js"></scr'+'ipt>\n' +
'<scr'+'ipt type="text/javascript" src="' + exporturl + 'lib/jquery/' + verdir + '/jquery-ui.custom.min.js"></scr'+'ipt>\n' +
'<scr'+'ipt type="text/javascript" src="' + exporturl + 'package/glow.' + gsversion + '.min.js"></scr'+'ipt>\n' +
'<scr'+'ipt type="text/javascript" src="' + exporturl + 'package/RSrun.' + gsversion + '.min.js"></scr'+'ipt>\n' +
'<scr'+'ipt type="text/javascript"><!--//--><![CDATA[//><!--\n' +
';(function() {' +
sc +
'\n;$(function(){ window.__context = { glowscript_container: $("#glowscript").removeAttr("id") }; __main__() })})()\n' +
'\n//--><!]]></scr'+'ipt>' +
'\n</div>')
savecode = GSedit.getValue()
GSedit.setValue(embedHTML)
startcursor = 0
endcursor = embedHTML.length
setTimeout(resetCursor, 30) // experimentally, can't correctly update cursor position here
$("#export").html('Restore')
}
var startcursor
var endcursor
var resetCursor = function() {
GSedit.editarea[0].focus()
GSedit.editarea[0].setSelectionRange(startcursor,endcursor)
}
function gsErrorHandler(err) {
gsErrordiv.innerHTML = "<p>"+err+"</p>"
}
function readSingleFile(evt) {
exporting = false
var ok = true
if (GSedit.changed()) {
var s = "To continue without saving, click OK.\nTo save, click Cancel, then click Save."
if (confirm(s)) ok = true
else ok = false
}
if (ok) {
savecode = null
$("#export").html('Export')
var f, reader
f = evt.target.files[0]
if (f) {
reader = new FileReader()
reader.onload = function(e) {
var content = e.target.result
GSedit.setValue(content)
}
reader.readAsText(f)
}
}
}
document.getElementById('read_local_file').addEventListener('change', readSingleFile, false)
</script>
<div id="gserrors" style="font-family:Verdana;font-size:13px;color:#c00">
</div>
<div class='api'>
<div id='sourcetext' class="split split-horizontal"></div>
<div id='glows' class="split split-horizontal"></div>
<div id='printing' class="split split-horizontal"></div>
</div>
<script>
// Splits library: https://github.com/nathancahill/Split.js
var lastwindowwidth = window.innerWidth
var splits = Split(['#sourcetext', '#glows', "#printing"], {sizes: [50,50,0], onDrag:splitdrag})
// splits.getSizes() returns current percentage widths; splits.setSizes([w1,w2]) resets them
var source = ''
GSedit.init("#sourcetext", source, 0.5*lastwindowwidth, false) // not readonly
function splitdrag() {
var s = splits.getSizes() // returns [width1, width2, width3]
lastprintwidth = splits.getSizes()[2]
GSedit.setwidth(0.01*s[0]*window.innerWidth)
}
function splitAdjust() { // p is true if print pane should be open
var current = splits.getSizes()
var w1 = current[0]*lastwindowwidth/window.innerWidth
var w2 = current[1]
var w3 = current[2]
var rest = 100-w1
lastwindowwidth = window.innerWidth
if (printpane) {
if (lastprintwidth === null) splits.setSizes([w1,0.7*rest,0.3*rest])
else splits.setSizes([w1,rest-lastprintwidth,lastprintwidth])
lastprintwidth = splits.getSizes()[2]
} else splits.setSizes([w1,rest,0])
GSresize(0.01*w1*window.innerWidth)
print_options({height:window.innerHeight})
}
$(window).resize(function () {
splitAdjust()
})
window.onbeforeunload = undefined // execute window.onbeforeunload = Quit if GSedit.changed() is true
function Quit(e) { // Some browsers just say "Do you want to leave this site? Changes you made may not have been saved."
var s = "To continue without saving, click OK.\nTo save, click Cancel, then click save."
e.returnValue = s
return s
}
// https://ourcodeworld.com/articles/read/189/how-to-create-a-file-and-generate-a-download-with-javascript-in-the-browser-without-a-server
function download(filename, text) {
var element = document.createElement('a');
element.setAttribute('href', 'data:text/plain;charset=utf-8,' + encodeURIComponent(text));
element.setAttribute('download', filename);
element.style.display = 'none';
document.body.appendChild(element);
element.click();
document.body.removeChild(element);
}
var lastname = '' // the file name chosen the last time the user saved code
function saveCode() {
var name = prompt("Enter the file name (without extension)", lastname)
if (name === null) return
lastname = name
var extension = '.py'
if (!GSedit.isPython()) extension = '.js'
if (exporting) extension = '.html'
download(name+extension, GSedit.getValue())
}
function reportScriptError(program, err) { // This machinery only gives trace information on Chrome
// The trace information provided by browsers other than Chrome does not include the line number
// of the user's program, only the line numbers of the GlowScript libraries. For that reason
// none of the following cross browser stack trace reporters are useful for GlowScript:
// Single-page multibrowser stack trace: https://gist.github.com/samshull/1088402
// stacktrase.js https://github.com/stacktracejs/stacktrace.js https://www.stacktracejs.com/#!/docs/stacktrace-js
// tracekit.js; https://github.com/csnover/TraceKit
var feedback = err.toString()+'<br>'
var prog = program.split('\n')
//for(var i=0; i<prog.length; i++) console.log(i, prog[i])
var unpack = /[ ]*at[ ]([^ ]*)[^>]*>:(\d*):(\d*)/
var traceback = []
if (err.cursor) {
//console.log('err.cursor',err.cursor)
// This is a syntax error from narcissus; extract the source
var c = err.cursor
while (c > 0 && err.source[c - 1] != '\n') c--;
traceback.push(err.source.substr(c).split("\n")[0])
//traceback.push(new Array((err.cursor - c) + 1).join(" ") + "^") // not working properly
} else {
// This is a runtime exception; extract the call stack if possible
try {
// Strange behavior: sometimes err.stack is an array of end-of-line-terminated strings,
// and at other times it is one long string; in the latter case we have to create rawStack
// as an array of strings.
var rawStack
if (typeof err.stack == 'string') rawStack = err.stack.split('\n')
else rawStack = err.stack
//for (var i=0; i<rawStack.length; i++) console.log(i, rawStack[i])
// TODO: Selection and highlighting in the dialog
var first = true
var i, m, caller, jsline, jschar
for (i=1; i<rawStack.length; i++) {
m = rawStack[i].match(unpack)
if (m === null) continue
caller = m[1]
jsline = m[2]
jschar = m[3]
if (caller.slice(0,3) == 'RS_') continue
if (caller == 'compileAndRun') break
if (caller == 'main') break
var line = prog[jsline-1]
if (window.__GSlang == 'javascript') { // Currently unable to embed line numbers in JavaScript programs
traceback.push(line)
traceback.push("")
break
}
var L = undefined
var end = undefined
for (var c=jschar; c>=0; c--) { // look for preceding "linenumber";
if (line[c] == ';') {
if (c > 0 && line[c-1] == '"') {
var end = c-1 // rightmost digit in "23";
c--
}
} else if (line[c] == '"' && end !== undefined) {
L = line.slice(c+1,end)
break
} else if (c === 0) {
jsline--
line = prog[jsline-1]
c = line.length
}
}
if (L === undefined) continue
var N = Number(L)-1
if (first) traceback.push('At or near line '+N+': '+window.__original.text[N-1])
else traceback.push('Called from line '+N+': '+window.__original.text[N-1])
first = false
traceback.push("")
if (caller == '__$main') break
}
} catch (ignore) {
}
}
for (var i= 0; i<traceback.length; i++) feedback += '<br>'+traceback[i]
gsErrordiv = $("#gserrors")[0]
gsErrorHandler(feedback)
}
</script>
</html>
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