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Reactive notebook Button/Input #135

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Reactive notebook Button/Input #135

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80 changes: 64 additions & 16 deletions examples/coffeeshop.js
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Original file line number Diff line number Diff line change
Expand Up @@ -5,7 +5,7 @@
//
// This script should be loaded _after_ ganja.js

if (window.Algebra === undefined) console.warning("coffeeshop.js hould be loaded after ganja.js");
if (window.Algebra === undefined) console.warn("coffeeshop.js should be loaded after ganja.js");
else (function (){

// Overload Algebra call.
Expand All @@ -26,25 +26,43 @@ else (function (){
return res;
}

window.applyKatex = function() {
if (!window.renderMathInElement) {
console.warn('window.renderMathInElement not defined');
return;
}
renderMathInElement(document.body, {
// customised options
// • auto-render specific keys, e.g.:
delimiters: [
{left: '$$', right: '$$', display: true},
{left: '$', right: '$', display: false},
{left: '\\(', right: '\\)', display: false},
{left: '\\[', right: '\\]', display: true}
],
// • rendering keys, e.g.:
throwOnError : false
});
}

// Install MD and Katex handlers.
window.md = function(...args) {
var div = document.createElement('div');
div.innerHTML = marked.parse(...args);
document.body.appendChild(div);
if (window.renderMathInElement) renderMathInElement(document.body, {
// customised options
// • auto-render specific keys, e.g.:
delimiters: [
{left: '$$', right: '$$', display: true},
{left: '$', right: '$', display: false},
{left: '\\(', right: '\\)', display: false},
{left: '\\[', right: '\\]', display: true}
],
// • rendering keys, e.g.:
throwOnError : false
});
var div;
var lambda = args[0];
if (lambda instanceof Function) {
div = md(lambda());
divLambdas.push([div, lambda]);
} else {
div = document.createElement('div');
div.innerHTML = marked.parse(...args);
document.body.appendChild(div);
applyKatex();
}
return div;
}

window.divLambdas = [];

// Notebook option
window.notebook = function(title) {
window.title = title;
Expand All @@ -55,7 +73,37 @@ else (function (){
return hljs.highlight("javascript",code).value;
}
});
divLambdas.length = 0;
}

window.reEval = function() {
for (var [div, lambda] of divLambdas) {
var val = lambda();
div.innerHTML = marked.parse(val);
}
applyKatex();
}

window.Button = function(text, onclick) {
var button = document.createElement("button");
button.innerText = text;
button.onclick = () => {
onclick();
reEval();
};
document.body.appendChild(button);
return button;
}

window.Input = function(str, lambda) {
var input = document.createElement("input");
document.body.appendChild(input);
input.value = str;
input.oninput = () => {
lambda(input.value);
reEval();
}
return input;
}

})()