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webeditor.html
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<html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.js"></script>
<script src="https://raw.github.com/Page-/ometa-js/highlighting/lib/ometajs/core.js"></script>
<script src="https://raw.github.com/Page-/ometa-js/highlighting/lib/ometajs/ometa/parsers.js"></script>
<script src="https://raw.github.com/marijnh/CodeMirror/master/lib/codemirror.js"></script>
<script src="http://lisperator.net/s/js/uglifyjs/uglify.js"></script>
<script>
window.codeMirrorOmetaBridgeHighlighter=function(n,e,r,t){t=t||{},t={disableReusingMemoizations:t.disableReusingMemoizations||!1,disableVisibleOnlyHighlighting:t.disableVisibleOnlyHighlighting||!1}
var i=function(){var e=n.createInstance()
return t.disableReusingMemoizations||e.enableReusingMemoizations(e._sideEffectingRules),e._enableTokens(),function(){return e.reset&&e.reset(),e}}(),o=function(n){for(var e=0;n.currentTokens.length>e;e++)n.currentTokens[e][0]<=n.index&&(n.currentTokens.splice(e,1),e--)},u=function(n,e){for(var r=n.index;r>=n.previousIndex;r--)null!=e[r]&&(n.currentTokens=n.currentTokens.concat(e[r]))
n.previousIndex=n.index,o(n)},s=function(n){o(n)
for(var e=n.currentTokens[0],r=1;n.currentTokens.length>r;r++)n.currentTokens[r][0]<e[0]&&(e=n.currentTokens[r])
return e}
CodeMirror.defineMode(e,function(r,o){var l,a,c=[],d=0,f=function(n,e){(!e||e.eol())&&(l(),n.index++)},g=function(n,r){var t=n.pos
if(n.eatSpace())return r.index+=n.pos-t,f(r,n),null
var i=s(r),o=i[0]-r.index,u=n.string.length-n.pos
return u=Math.min(u,o),n.pos+=u,r.index+=u,f(r,n),e+"-"+i[1]}
return function(){var n="",e=0,r=function(n){var e=[]
try{do e[n.idx]=n.tokens
while(n=n.tail())}catch(r){}return e}
l=function(u){var s=o.getOMetaEditor()
if(null!=s){var l=s.getValue(),a=s.getViewport().to,f=""
if(o.hasOwnProperty("prependText")&&(f=o.prependText()),null!=u||l!=n||!t.disableVisibleOnlyHighlighting&&a>e){if(null!=u&&(a=Math.min(s.lastLine(),u)),n=l,!t.disableVisibleOnlyHighlighting){e=a
for(var g=0,p=0;a>p;p++){if(g=l.indexOf("\n",g),-1===g){g=l.length
break}g++}l=l.slice(0,g)}l=f+l
var h=i()
try{var x=h.matchAll(l,"Process")}catch(v){}return c=r(h.inputHead),d=f.length,x}}},a=function(){return l(1/0)}}(),{copyState:function(n){return{index:n.index,previousIndex:n.previousIndex,currentTokens:n.currentTokens}},startState:function(){return{index:d,previousIndex:-1,currentTokens:[]}},blankLine:f,token:function(n,e){if(n.sol()&&l(),u(e,c),e.currentTokens.length>0)return g(n,e)
for(n.pos++,e.index++;n.pos<n.string.length;n.pos++&&e.index++)if(null!=c[e.index])return null
return f(e),null},indent:function(){return 0},getGrammar:function(){return n.createInstance()},prependText:function(){return o.hasOwnProperty("prependText")?o.prependText():""},fullParse:a}}),null!=r&&CodeMirror.defineMIME(r,e)}
</script>
<link href="https://raw.github.com/marijnh/CodeMirror/master/lib/codemirror.css" media="screen" rel="stylesheet" type="text/css" />
<script type="text/x-mathjax-config">
MathJax.Hub.Config({tex2jax: {inlineMath: [["[beginmathjax]","[endmathjax]"]],
displayMath: [["[beginmathjaxdisplay]","[endmathjaxdisplay]",]]}});
</script>
<script type="text/javascript"
src="https://c328740.ssl.cf1.rackcdn.com/mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML">
</script>
<style type="text/css">
.CodeMirror {
border: 1px solid #ADABB3;
}
span.cm-markdown-h1 {
color: #0000FF;
}
span.cm-markdown-h2 {
color: #3333FF;
}
span.cm-markdown-h3 {
color: #6666FF;
}
span.cm-markdown-strong {
font-weight: bold;
}
span.cm-markdown-em {
font-style: italic;
}
span.cm-markdown-codeblock {
color: gray;
}
span.cm-markdown-expr {
color: orange;
}
span.cm-markdown-latex, span.cm-markdown-latexdisplay{
color: green;
}
</style>
<!--
<script src='../../web/ometa-js/lib.js'></script>
<script src="../../web/ometa-js/ometa-base.js"></script>
<script src="../../web/ometa-js/parser.js"></script>
<script src="../../web/ometa-js/bs-js-compiler.js"></script>
<script src="../../web/ometa-js/bs-ometa-compiler.js"></script>
<script src="../../web/ometa-js/bs-ometa-optimizer.js"></script>
<script src="../../web/ometa-js/bs-ometa-js-compiler.js"></script>
-->
<style type="text/css">
h1, h2, h3 { font-family: sans-serif; }
#output {
border: 1px solid black;
width: 40em;
padding: 1em;
}
pre {
border: 1px solid brown;
background-color: orange;
padding: 0.5em;
}
.expr {
color: red;
}
</style>
</head>
<body>
<h1>Markdown Editor with Inline Expressions</h1>
<p>The preview will be updated on every keystroke.</p>
<!--738
http://localhost/~josh/projects/compilerclass/guitest2/tests/webeditor.html
-->
<script type="text/ometajs" id="ometadd">
//escape the < > and new lines
function esc(s) {
return s.replace(/</g,"<").replace(/>/g,">").replace(/\n/g,"<br/>");
}
function tag(tag, str) {
return " <"+tag+">"+str+"</"+tag+">";
}
ometa Foo {
toEOL = (~seq('\n') anything)*:t '\n' -> t.join(""),
//headers
h1 = "#" ' ' toEOL:t -> tag("h1",t),
h2 = "##" ' ' toEOL:t -> tag("h2",t),
h3 = "###" ' ' toEOL:t -> tag("h3",t),
//paragraph
paraend = '\n' ' '* '\n',
para =
( latexdisplay
| latex
| expr
| strong
| em
| (~paraend anything)
)+:t
-> tag("p",t.join("")),
// text = <(~seq('\n\n') anything)*>,
strong =
"**"
<(~seq('**') anything)*>:t
"**"
-> tag("strong", t),
em =
( "*" <(~seq('*') anything)*>:t "*"
| "_" <(~seq('_') anything)*>:t "_")
-> tag("em", t),
expr =
"{"
exp:t
"}"
-> tag("b", t),
latex = "$" (~seq('$') char)*:t "$"
-> (" [beginmathjax]"+t.join("")+"[endmathjax]"),
latexdisplay = "$$" (~seq('$') char)*:t "$$"
-> (" [beginmathjaxdisplay]"+t.join("")+"[endmathjaxdisplay]"),
//blockquote
blockquote = "> " para:t -> tag("blockquote",t),
//code block
cbdelim =
seq('```\n'),
codeblock =
cbdelim
<(~seq('```') anything)*>:t
cbdelim
-> tag("pre", esc(t)),
//inline expressions
num = <digit+>:n -> parseInt(n),
term = num,
expadd = term:a "+" term:b -> (a+b),
expmul = term:a "*" term:b -> (a*b),
expsub = term:a "-" term:b -> (a-b),
expdiv = term:a "/" term:b -> (a/b),
exp = (expmul|expdiv|expadd|expsub):e -> (" <b class='expr'>" + e + "</b>") ,
//pull it all together
line = spaces (h3|h2|h1|blockquote|codeblock|para):t spaces -> t,
Process = line*
};
Foo._enableTokens = function() {
this.tokensEnabled = true;
OMeta._enableTokens.call(this, ['h1', 'h2', 'h3', 'strong', 'codeblock', 'expr', 'em','latex','latexdisplay']);
};
</script>
<script type="text/javascript">
$(document).ready(function() {
var editor,
compressor = UglifyJS.Compressor({
sequences: false,
unused: false // We need this off for OMeta
}),
parseError = function(source) {
return function(matchingError, index) {
var line = 1,
column = 0,
i = 0,
char,
start;
for(; i < index; i++) {
char = source.charAt(i);
column++;
if(char == '\n') {
line++;
column = 0;
}
}
console.error('Error on line ' + line + ', column ' + column);
start = Math.max(0, index - 20);
console.error('Error around: ' + source.substring(start, Math.min(source.length, start + 40)));
console.error('Error around: ' + source.substring(index - 2, Math.min(source.length, index + 2)));
throw matchingError;
}
},
compileOMeta = function (source) {
var tree = BSOMetaJSParser.matchAll(source, "topLevel", undefined, parseError(source)),
js = BSOMetaJSTranslator.match(tree, "trans"),
ast = UglifyJS.parse(js);
ast.figure_out_scope();
ast = ast.transform(compressor);
js = ast.print_to_string({
beautify: true
});
return js;
};
console.log("started");
$('#editor').keyup(function(){
update();
});
function update() {
var text = editor.getValue();
var output = Foo.matchAll(text,'Process');
console.log("matched = " + output);
$("#output").html(output);
//MathJax.Hub.Queue(["Typeset",MathJax.Hub,"output"]);
MathJax.Hub.Queue(["Typeset",MathJax.Hub,$("#output").get(0)]);
}
window.transformTimer = false;
function updateAfterTimeout() {
if(transformTimer) {
//console.log("clearing Timeout");
window.clearTimeout(transformTimer);
transformTimer = undefined;
}
transformTimer = window.setTimeout(function() { update(); }, 800);
}
console.log("running ometa");
function parseit(str) {
var js = compileOMeta(str);
eval(js);
window.Foo = Foo;
}
console.log("text = " + $("#ometadd").text());
parseit($("#ometadd").text());
codeMirrorOmetaBridgeHighlighter(Foo, 'markdown', 'text/markdown');
editor = CodeMirror.fromTextArea($('#editor')[0], {
mode: {
name: 'markdown',
getOMetaEditor: function() {
return editor;
}
},
onKeyEvent: updateAfterTimeout
}
);
console.log("we have a parser now: "+ Foo);
update();
});
</script>
<form>
<textarea id="editor" rows="20" cols="80"># Big Header
## Sub Header
### Sub Sub Header
This *is a* paragraph, _really_. You must
use **double** new lines to separate
the paragraphs
like this.
Thanks to MathJax, we can actually typeset math formulas such as
$\sqrt{x^2_j+y^2_j}$ and $S\subset\mathbb{R}^d$. This also handles strict
inequality signs correctly, as in $x<7$ or $a>b$. Finally, we can also create
displayed equations like this one
$$\sum_{i\geq 0} x^i= \frac{1}{1-x}.$$
We can also use blockquotes like this one:
> The sky above the port was the color of television tuned to a dead channel.
Code fragments work:
```
this is a block of code
with hard coded line
breaks and escaped > symbols
```
### Inline Expression Tests
Add: 4 + 5 = {4+5}
Subtract: 4 - 5 = {4-5}
Multiply 4 x 5 = {4*5}
Divide 4 / 5 = {4/5}
## ToDo List
There are a great many features that still need to be implemented!
Unordered Lists
* one
* two
* sub 2.1
* sub 2.2
* three
Ordered Lists
Images
Links
Allow environments to cross, as in: _The cardinality $\aleph_0$ is infinite!_
Allow escaped dollar signs in latex code like $f(70\$)$.
But do not get confused about stuff like $x\\$. And unescape \$ in plain text.
</textarea>
</form>
<div id="output"></div>
</body></html>