435 lines
10 KiB
JavaScript
435 lines
10 KiB
JavaScript
var FGFS = {};
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FGFS.Property = function(path) {
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if (path == null)
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throw new Error('path is null');
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// path must be absolute
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if (path.lastIndexOf("/", 0) !== 0)
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path = "/".concat(path);
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this.path = path.lastIndexOf("/", 0) === 0 ? path : "/".concat(path);
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this.value = null;
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}
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FGFS.Property.prototype.getPath = function() {
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return this.path;
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}
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FGFS.Property.prototype.setValue = function(val) {
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// TODO: send this out
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this.value = val;
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}
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FGFS.Property.prototype.hasValue = function() {
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return this.value != null;
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}
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FGFS.Property.prototype.getValue = function(val) {
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return this.value;
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}
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FGFS.Property.prototype.getStringValue = function(val) {
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return this.value == null ? null : this.value.toString();
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}
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FGFS.Property.prototype.getNumValue = function(val) {
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var reply = this.value == null ? null : Number(this.value);
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return (isNaN(reply) || reply == null) ? 0 : reply;
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}
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FGFS.PropertyListener = function(arg) {
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this._listeners = {};
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this._nextId = 1;
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this._ws = new WebSocket('ws://' + location.host + '/PropertyListener');
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function defaultOnClose(ev) {
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var msg = 'Lost connection to FlightGear. Please reload this page and/or restart FlightGear.';
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alert(msg);
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throw new Error(msg);
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}
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function defaultOnError(ev) {
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var msg = 'Error communicating with FlightGear. Please reload this page and/or restart FlightGear.';
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alert(msg);
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throw new Error(msg);
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}
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this._ws.propertyListener = this;
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this._ws.onopen = arg.onopen;
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this._ws.onclose = defaultOnClose;
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this._ws.onerror = defaultOnError;
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this._ws.onmessage = function(ev) {
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try {
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this.propertyListener.fire(JSON.parse(ev.data));
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} catch (e) {
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}
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};
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this.fire = function(node) {
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this._listeners[node.path].forEach(function(callback) {
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callback.cb(node);
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});
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};
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this.addProperty = function(prop, callback) {
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var path = prop.getPath();
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var o = this._listeners[path];
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var newProperty = false;
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if (typeof (o) == 'undefined') {
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newProperty = true;
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o = [];
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this._listeners[path] = o;
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}
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o.push({
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cb : callback,
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"prop" : prop,
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id : this._nextId++
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});
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if (newProperty) {
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this._ws.send(JSON.stringify({
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command : 'addListener',
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node : path
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}));
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this._ws.send(JSON.stringify({
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command : 'get',
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node : path
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}));
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}
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return this._nextId;
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};
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this.removeProperty = function(prop) {
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throw new Error('removeProperty not yet implemented');
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};
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}
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// expects:
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// [
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// [ "key", "/fg/property/path" ],
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// [ "key", "/another/fg/property/path" ],
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// ]
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FGFS.PropertyMirror = function(mirroredProperties) {
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var mirror = {}
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for( var i = 0; i < mirroredProperties.length; i++ ) {
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var pair = mirroredProperties[i];
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mirror[pair[0]] = new FGFS.Property(pair[1]);
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}
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var listener = new FGFS.PropertyListener({
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onopen : function() {
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var keys = Object.keys(mirror);
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for (var i = 0; i < keys.length; i++) {
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listener.addProperty(mirror[keys[i]], function(n) {
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if (typeof (n.value) != 'undefined')
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this.prop.value = n.value;
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});
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}
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;
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},
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});
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this.listener = listener;
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this.mirror = mirror;
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this.getNode = function(id) {
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return this.mirror[id];
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};
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// TODO: ugly static variable, change this!
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FGFS.NodeProvider.mirror = this;
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}
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FGFS.interpolate = function(x, pairs) {
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var n = pairs.length - 1;
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if (x <= pairs[0][0]) {
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return pairs[0][1];
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}
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if (x >= pairs[n][0]) {
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return pairs[n][1];
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}
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for (var i = 0; i < n; i = i + 1) {
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if (x > pairs[i][0] && x <= pairs[i + 1][0]) {
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var x1 = pairs[i][0];
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var x2 = pairs[i + 1][0];
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var y1 = pairs[i][1];
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var y2 = pairs[i + 1][1];
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return (x - x1) / (x2 - x1) * (y2 - y1) + y1;
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}
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}
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return pairs[i][1];
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}
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FGFS.NodeProvider = {
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mirror: null,
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getNode: function(id) {
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if( this.mirror == null )
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throw new Error('no nodes without a mirror');
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return this.mirror.getNode(id);
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}
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}
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FGFS.InputValue = function(arg) {
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this.__proto__ = FGFS.NodeProvider;
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this.value = 0;
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this.property = null;
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this.offset = 0;
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this.scale = 1;
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this.interpolationTable = null;
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this.min = null;
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this.max = null;
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this.getValue = function() {
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var value = this.value;
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if (this.property != null)
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value = this.property.getNumValue();
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if (this.interpolationTable != null && this.interpolationTable.length > 0)
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return FGFS.interpolate(value, this.interpolationTable);
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value = value * this.scale + this.offset;
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if( this.min != null && value < this.min )
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return this.min;
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if( this.max != null && value > this.min )
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return this.max;
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return value;
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}
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if (typeof (arg) == 'number') {
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this.value = Number(arg);
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} else if (typeof (arg) == 'string') {
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this.property = this.getNode(arg);
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} else if (typeof (arg) == 'object') {
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if (typeof (arg.property) != 'undefined')
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this.property = this.getNode(arg.property);
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if (typeof (arg.value) != 'undefined')
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this.value = Number(arg.value);
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if (typeof (arg.scale) != 'undefined')
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this.scale = Number(arg.scale);
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if (typeof (arg.offset) != 'undefined')
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this.offset = Number(arg.offset);
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if (typeof (arg.interpolation == 'string')) {
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var target = this;
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if (typeof (arg.interpolation) == 'string') {
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this.interpolationTable = [];
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// load interpolation table
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$.ajax({
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type : "GET",
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dataType : "XML",
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url : arg.interpolation,
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success : function(data, status, xhr) {
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var entries = $(data).find("entry");
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$(data).find("entry").each(function() {
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var ind = $(this).find("ind").text();
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var dep = $(this).find("dep").text();
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target.interpolationTable.push([ Number(ind), Number(dep) ]);
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});
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},
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error : function(xhr, status, msg) {
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alert(status + " while reading '" + arg.interpolation + "': " + msg.toString());
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},
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});
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}
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}
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} else {
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throw new Error('Dont know how to handle "' + arg.toString() + '"' );
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}
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}
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FGFS.Transform = function(arg) {
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}
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FGFS.RotateTransform = function(arg) {
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this.__proto__ = new FGFS.Transform(arg);
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this.a = new FGFS.InputValue(arg.a);
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this.x = new FGFS.InputValue(arg.x);
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this.y = new FGFS.InputValue(arg.y);
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this.makeTransform = function() {
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return {
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type : "rotate",
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props : {
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a : this.a.getValue(),
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x : this.x.getValue(),
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y : this.y.getValue(),
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context : this,
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}
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}
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}
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}
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FGFS.TranslateTransform = function(arg) {
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this.__proto__ = new FGFS.Transform(arg);
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this.x = new FGFS.InputValue(arg.x);
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this.y = new FGFS.InputValue(arg.y);
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this.makeTransform = function() {
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return {
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type : "translate",
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props : {
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x : this.x.getValue(),
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y : this.y.getValue(),
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context : this,
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}
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}
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}
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}
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FGFS.Animation = function(arg) {
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this.element = arg.element;
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this.type = arg.type;
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this.__proto__.update = function(svg) {
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var t = typeof (this._element);
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if (typeof (this._element) == 'undefined') {
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this._element = $(svg).find(this.element);
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}
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this._element.fgAnimateSVG(this.makeAnimation());
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}
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this.__proto__.makeAnimation = function() {
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return {};
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}
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}
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FGFS.TransformAnimation = function(arg) {
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this.__proto__ = new FGFS.Animation(arg);
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this.transforms = [];
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for (var i = 0; i < arg.transforms.length; i++) {
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var t = arg.transforms[i];
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var transform = null;
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switch (t.type) {
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case 'rotate':
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transform = new FGFS.RotateTransform(t);
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break;
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case 'translate':
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transform = new FGFS.TranslateTransform(t);
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break;
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}
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if (transform != null)
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this.transforms[this.transforms.length] = transform;
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}
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this.makeAnimation = function() {
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var reply = {
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type : 'transform',
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transforms : [],
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};
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for (var i = 0; i < this.transforms.length; i++)
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reply.transforms[reply.transforms.length] = this.transforms[i].makeTransform();
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return reply;
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}
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}
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FGFS.Instrument = function(arg) {
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// load svg into target
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$.ajax({
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type : "GET",
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url : arg.src,
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async: false,
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dataType : "xml",
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context: this,
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success : function(xml, status, xhr) {
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this.svg = $(xml).find("svg")[0];
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},
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error : function(xhr, status, msg) {
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alert(status + " while reading '" + arg.src + "': " + msg.toString());
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},
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});
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this.animations = [];
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for (var i = 0; i < arg.animations.length; i++) {
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var a = arg.animations[i];
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var animation = null;
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switch (a.type) {
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case 'transform':
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animation = new FGFS.TransformAnimation(a);
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break;
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}
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if (animation != null)
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this.animations[this.animations.length] = animation;
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}
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this.__proto__.update = function() {
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// noop if svg is not (yet) loaded
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if (typeof (this.svg) == 'undefined')
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return;
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var svg = this.svg;
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this.animations.forEach(function(animation) {
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animation.update(svg);
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});
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}
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}
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FGFS.FGPanel = function( propUrl )
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{
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var defaultProps = {
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instrumentSelector: ".instrument",
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instrumentDataKey: "fgpanel-instrument",
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updateInterval: 50,
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};
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this.props = Object.create( defaultProps );
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if( typeof(propUrl) == 'string' ) {
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$.ajax({
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type : "GET",
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url : propUrl,
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async: false,
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dataType : "json",
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context: this,
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success : function(data, status, xhr) {
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data.__proto__ = defaultProps;
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this.props = data;
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},
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error : function(xhr, status, msg) {
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alert(status + " while reading '" + propUrl + "': " + msg.toString());
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},
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});
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}
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var mirror = new FGFS.PropertyMirror(this.props.propertyMirror);
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var instruments = $(this.props.instrumentSelector).fgLoadInstruments(this.props.instrumentDataKey);
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window.setInterval( function() {
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instruments.forEach(function(instrument) {
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instrument.update();
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});
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}, this.props.updateInterval );
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}
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$(document).ready(function() {
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var hasFGPanel = $("body").data("fgpanel");
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if( hasFGPanel ) {
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var panelProps = $("body").data("fgpanel-props");
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new FGFS.FGPanel( panelProps == null ? "fgpanel.json" : panelProps );
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}
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});
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