Two simple in-browser examples
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Tony Garnock-Jones
parent
a8b7de0d64
commit
761f5652af
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<!doctype html>
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<html>
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<head>
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<title>Syndicate: Smoketest with DSL</title>
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<meta charset="utf-8">
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<script src="../../third-party/jquery-2.2.0.min.js"></script>
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<script src="../../dist/syndicatecompiler.js"></script>
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<script src="../../dist/syndicate.js"></script>
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<script type="text/syndicate-js" src="index.js"></script>
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</head>
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<body>
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<h1>Smoketest</h1>
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</body>
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</html>
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assertion type beep(counter);
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ground network {
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console.log('starting ground boot');
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actor {
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until {
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case asserted Syndicate.observe(beep(_)) {
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var counter = 0;
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state {
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init {
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:: beep(counter++);
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}
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on message beep(_) {
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:: beep(counter++);
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}
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} until {
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case (counter >= 10);
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}
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}
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}
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}
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actor {
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forever {
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on message $m {
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console.log("Got message:", m);
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}
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}
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}
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}
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<!doctype html>
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<html>
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<head>
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<title>Syndicate: Textfield Example (DSL variation)</title>
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<meta charset="utf-8">
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<link href="style.css" rel="stylesheet">
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<script src="../../third-party/jquery-2.2.0.min.js"></script>
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<script src="../../dist/syndicatecompiler.js"></script>
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<script src="../../dist/syndicate.js"></script>
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<script type="text/syndicate-js" src="index.js"></script>
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</head>
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<body>
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<h1>Textfield Example (DSL variation)</h1>
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<p>
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After <a href="http://www.hesam.us/cooplangs/textfield.pdf">Hesam
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Samimi's paper</a>.
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</p>
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<p id="inputRow" tabindex="0">Field contents: <span id="fieldContents"></span></p>
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<h2>Search</h2>
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<input type="text" id="searchBox" value="iti">
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<pre id="spy-holder"></pre>
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</body>
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</html>
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///////////////////////////////////////////////////////////////////////////
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// GUI
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assertion type jQuery(selector, eventType, event);
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assertion type fieldCommand(detail);
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assertion type fieldContents(text, pos);
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assertion type highlight(state);
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function escapeText(text) {
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text = text.replace(/&/g, '&');
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text = text.replace(/</g, '<');
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text = text.replace(/>/g, '>');
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text = text.replace(/ /g, ' ');
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return text;
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}
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function piece(text, pos, lo, hi, cls) {
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return "<span class='"+cls+"'>"+
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((pos >= lo && pos < hi)
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? (escapeText(text.substring(lo, pos)) +
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"<span class='cursor'></span>" +
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escapeText(text.substring(pos, hi)))
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: escapeText(text.substring(lo, hi)))
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+ "</span>";
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}
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function spawnGui() {
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actor {
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this.text = '';
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this.pos = 0;
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this.highlightState = false;
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this.updateDisplay = function () {
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var text = this.text;
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var pos = this.pos;
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var highlight = this.highlightState;
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var hLeft = highlight ? highlight.get(0) : 0;
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var hRight = highlight ? highlight.get(1) : 0;
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$("#fieldContents")[0].innerHTML = highlight
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? piece(text, pos, 0, hLeft, "normal") +
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piece(text, pos, hLeft, hRight, "highlight") +
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piece(text, pos, hRight, text.length + 1, "normal")
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: piece(text, pos, 0, text.length + 1, "normal");
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};
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forever {
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on message jQuery("#inputRow", "+keypress", $event) {
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var keycode = event.keyCode;
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var character = String.fromCharCode(event.charCode);
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if (keycode === 37 /* left */) {
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:: fieldCommand("cursorLeft");
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} else if (keycode === 39 /* right */) {
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:: fieldCommand("cursorRight");
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} else if (keycode === 9 /* tab */) {
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// ignore
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} else if (keycode === 8 /* backspace */) {
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:: fieldCommand("backspace");
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} else if (character) {
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:: fieldCommand(["insert", character]);
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}
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}
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on asserted fieldContents($text, $pos) {
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this.text = text;
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this.pos = pos;
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this.updateDisplay();
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}
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on asserted highlight($state) {
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this.highlightState = state;
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this.updateDisplay();
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}
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}
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}
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}
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///////////////////////////////////////////////////////////////////////////
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// Textfield Model
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function spawnModel() {
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actor {
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this.fieldContents = "initial";
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this.cursorPos = this.fieldContents.length; /* positions address gaps between characters */
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forever {
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assert fieldContents(this.fieldContents, this.cursorPos);
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on message fieldCommand("cursorLeft") {
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this.cursorPos--;
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if (this.cursorPos < 0)
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this.cursorPos = 0;
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}
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on message fieldCommand("cursorRight") {
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this.cursorPos++;
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if (this.cursorPos > this.fieldContents.length)
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this.cursorPos = this.fieldContents.length;
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}
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on message fieldCommand("backspace") {
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if (this.cursorPos > 0) {
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this.fieldContents =
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this.fieldContents.substring(0, this.cursorPos - 1) +
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this.fieldContents.substring(this.cursorPos);
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this.cursorPos--;
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}
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}
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on message fieldCommand(["insert", $newText]) {
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this.fieldContents =
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this.fieldContents.substring(0, this.cursorPos) +
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newText +
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this.fieldContents.substring(this.cursorPos);
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this.cursorPos += newText.length;
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}
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}
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}
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}
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///////////////////////////////////////////////////////////////////////////
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// Search engine
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function spawnSearch() {
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actor {
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this.fieldContents = "";
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this.highlight = false;
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this.search = function () {
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var searchtext = $("#searchBox")[0].value;
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if (searchtext) {
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var pos = this.fieldContents.indexOf(searchtext);
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this.highlight = (pos !== -1) && [pos, pos + searchtext.length];
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} else {
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this.highlight = false;
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}
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};
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forever {
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assert highlight(this.highlight);
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on message jQuery("#searchBox", "input", $event) {
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this.search();
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}
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on asserted fieldContents($text, _) {
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this.fieldContents = text;
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this.search();
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}
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}
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}
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}
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///////////////////////////////////////////////////////////////////////////
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// Main
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$(document).ready(function () {
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ground network G {
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Syndicate.JQuery.spawnJQueryDriver();
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Syndicate.DOM.spawnDOMDriver();
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spawnGui();
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spawnModel();
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spawnSearch();
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}
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G.network.onStateChange = function (mux, patch) {
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$("#spy-holder").text(Syndicate.prettyTrie(mux.routingTable));
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};
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});
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#fieldContents {
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font-family: monospace;
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}
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.cursor {
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border-left: solid red 1px;
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border-right: solid red 1px;
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}
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.highlight {
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background-color: yellow;
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}
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