139 lines
4.6 KiB
JavaScript
139 lines
4.6 KiB
JavaScript
//
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// Copyright (c) 2010 Ivan Shvedunov. All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions
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// are met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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//
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials
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// provided with the distribution.
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//
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// THIS SOFTWARE IS PROVIDED BY THE AUTHOR 'AS IS' AND ANY EXPRESSED
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// OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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// ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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// DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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// GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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// WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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var SwankJS = { socket: null, connected: false, bufferedOutput: [] };
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// TBD: check message contents
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// TBD: exception handling
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// TBD: trim stack trace excluding everything starting from swankjs_evaluate line
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SwankJS.debug = function debug () {
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if (!window.console)
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return;
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var debug = console.debug || console.log;
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if (!debug)
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return;
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var args = [];
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for (var i = 0; i < arguments.length; ++i)
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args.push(arguments[i]);
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debug.apply(console, args);
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};
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SwankJS.setup = function setup () {
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try {
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if (parent.window && parent.window.document !== document && parent.window.SwankJS)
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return;
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} catch (e) {}
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var self = this;
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// TBD: swank-js should proxy all requests to autoadd its scripts
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// (this way, the dynamic script loading stuff isn't necessary)
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// and to make flashsocket swf load from the same url as the
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// web app itself.
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// Don't forget about 'Host: ' header though!
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this.socket = new io.Socket();
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this.socket.on(
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"connect",
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function() {
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self.connected = true;
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self.debug("connected");
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self.socket.send({ op: "handshake", userAgent: navigator.userAgent });
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if (self.bufferedOutput.length > 0) {
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for (var i = 0; i < self.bufferedOutput.length; ++i)
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self.output(self.bufferedOutput[i]);
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self.bufferedOutput = [];
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}
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});
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this.socket.on(
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"message", function swankjs_evaluate (m) {
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self.debug("eval: %o", m);
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// var m = JSON.parse(message);
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try {
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var r = window.eval(m.code);
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} catch (e) {
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var message = String(e);
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if (message == "[object Error]") {
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try {
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message = "ERROR: " + e.message;
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} catch(e1) {}
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}
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self.debug("error = %s", message);
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self.socket.send({ op: "result", id: m.id,
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error: message + "\n" + swank_printStackTrace({ e: e }).join("\n") });
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return;
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}
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self.debug("result = %s", String(r));
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self.socket.send({ op: "result", id: m.id, error: null, values: r === undefined ? [] : [String(r)] }); });
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this.socket.on(
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"disconnect", function() {
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self.debug("connected");
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});
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this.socket.connect();
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};
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// useful functions for the REPL / web apps
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SwankJS.output = function output (str) {
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if (this.socket && this.connected)
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this.socket.send({ op: "output", str: str });
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else
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this.bufferedOutput.push(str);
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};
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SwankJS.reload = function reload () {
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document.location.reload(true);
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};
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SwankJS.refreshCSS = function refreshCSS () {
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// FIXME: this doesn't work in IE yet
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// FIXME: support refresh of individual CSS files
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var links = document.getElementsByTagName('link');
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for (var i = 0; i < links.length; i++) {
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var link = links[i];
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if (link.rel.toLowerCase().indexOf('stylesheet') >=0 && link.href) {
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var h = link.href.replace(/(&|\\?)forceReload=\d+/, "");
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link.href = h + (h.indexOf('?') >= 0 ? '&' : '?') + 'forceReload=' + Date.now();
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}
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}
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};
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/*
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// we may need this later
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SwankJS.makeScriptElement = function makeScriptElement (src, content) {
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var script = document.createElement("script");
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script.type = "text/javascript";
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if (src)
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script.src = src;
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else {
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var text = document.createTextNode(content);
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script.appendChild(text);
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}
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return script;
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};
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*/
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SwankJS.setup();
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