glowscript/GlowScriptOffline/GlowScript.html at c38f7eac809f2805afe36f278330e0c6672bd9e6 · vpython/glowscript

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<!DOCTYPE html>

<html>

<head>

<title>GlowScript Offline</title>

<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>

<button id="export" onclick="exportCode()">Export</button>

var gsversion = 2.7

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

function fontloading() { // trigger loading of fonts for 3D text

"use strict";

// override the fontloading url's in the GlowScript library

if (window.__font_sans === undefined) {

var fontrefsans = opentype_loadjs(Roboto_sans) // a sans serif font

window.__font_sans = fontrefsans // an opentype.js Font object

}

if (window.__font_serif === undefined) {

var fontrefserif = opentype_loadjs(Nimbus_serif) // a serif font

window.__font_serif = fontrefserif // an opentype.js Font object

}

fontloading() // get the sans and serif font files used by 3D text

// localCompile is a modification of https://github.com/BruceSherwood/glowscript/blob/master/ide/ide.js

function localCompile(header, compReady, errordiv) {

errordiv.innerHTML = ""

var compiler_url

if (header.lang == 'vpython' || header.lang == 'rapydscript') {

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 == 'rapydscript' || 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' || header.lang == 'rapydscript')

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)

}

function ready(program) {

var w = $("#glows")

w[0].innerHTML = "" // Comment this and the next if get a solution for too many WebGL context

w[0].innerHTML = '<div id="glowscript" class="glowscript"></div>'

try {

window.userMain = eval(program)

// At this point the user program has not been executed.

// Rather, eval_script has prepared the user program to be run.

//$("#loading").remove()

window.__context = {

glowscript_container: $("#glowscript")

}

window.userMain(function (err) {

if (err) {

reportScriptError(program, err)

}

})

} catch (err) {

reportScriptError(program, err);

}

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' +

'<link type="text/css" href="'+exporturl+'css/redmond/' + verdir + '/jquery-ui.custom.css" rel="stylesheet" />\n' +

'<link href="https://fonts.googleapis.com/css?family=Inconsolata" rel="stylesheet" type="text/css" />\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(__func) })})()\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>

</div>

// 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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