147 lines
3.6 KiB
JavaScript
147 lines
3.6 KiB
JavaScript
/*! Planetary.js v0.1.1
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* Copyright (c) 2013 Brandon Tilley
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*
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* Released under the MIT license
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* Date: 2013-12-22T07:02:54.469Z
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*/
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(function (root, factory) {
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if (typeof define === 'function' && define.amd) {
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define(['d3', 'topojson'], factory);
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} else if (typeof exports === 'object') {
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module.exports = factory(require('d3'), require('topojson'));
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} else {
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root.planetaryjs = factory(root.d3, root.topojson, root);
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}
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}(this, function(d3, topojson, window) {
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'use strict';
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var originalPlanetaryjs = null;
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if (window) originalPlanetaryjs = window.planetaryjs;
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var plugins = [];
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var doDrawLoop = function(planet, canvas, hooks) {
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d3.timer(function() {
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planet.context.clearRect(0, 0, canvas.width, canvas.height)
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for (var i = 0; i < hooks.onDraw.length; i++) {
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hooks.onDraw[i]();
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}
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});
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};
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var initPlugins = function(planet, localPlugins) {
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// Add the global plugins to the beginning of the local ones
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for (var i = 0; i < plugins.length; i++) {
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localPlugins.unshift(plugins[i]);
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}
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// Load the default plugins if none have been loaded so far
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if (localPlugins.length == 0) {
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if (planetaryjs.plugins.earth)
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planet.loadPlugin(planetaryjs.plugins.earth());
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if (planetaryjs.plugins.pings)
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planet.loadPlugin(planetaryjs.plugins.pings());
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}
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for (var i = 0; i < localPlugins.length; i++) {
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localPlugins[i](planet);
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}
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};
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var runOnInitHooks = function(planet, canvas, hooks) {
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// onInit hooks can be asynchronous if they take a parameter;
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// iterate through them one at a time
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if (hooks.onInit.length) {
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var completed = 0;
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var doNext = function(callback) {
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var next = hooks.onInit[completed];
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if (next.length) {
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next(function() {
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completed++;
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callback();
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});
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} else {
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next();
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completed++;
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setTimeout(callback, 0);
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}
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};
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var check = function() {
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if (completed >= hooks.onInit.length) doDrawLoop(planet, canvas, hooks);
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else doNext(check);
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}
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doNext(check);
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} else {
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doDrawLoop(planet, canvas, hooks);
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}
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};
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var startDraw = function(planet, canvas, localPlugins, hooks) {
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initPlugins(planet, localPlugins);
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planet.canvas = canvas;
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planet.context = canvas.getContext('2d');
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runOnInitHooks(planet, canvas, hooks);
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};
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var planetaryjs = {
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plugins: {},
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noConflict: function() {
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window.planetaryjs = originalPlanetaryjs;
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return planetaryjs;
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},
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loadPlugin: function(plugin) {
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plugins.push(plugin);
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},
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planet: function() {
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var localPlugins = [];
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var hooks = {
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onInit: [],
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onDraw: []
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};
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var planet = {
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plugins: {},
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draw: function(canvas) {
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startDraw(planet, canvas, localPlugins, hooks);
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},
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onInit: function(fn) {
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hooks.onInit.push(fn);
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},
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onDraw: function(fn) {
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hooks.onDraw.push(fn);
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},
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loadPlugin: function(plugin) {
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localPlugins.push(plugin);
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},
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withSavedContext: function(fn) {
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if (!this.context) {
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throw new Error("No canvas to fetch context for")
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}
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this.context.save();
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fn(this.context);
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this.context.restore();
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}
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};
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planet.projection = d3.geo.orthographic()
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.clipAngle(90)
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.precision(0);
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planet.path = d3.geo.path().projection(planet.projection);
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return planet;
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}
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};
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return planetaryjs;
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}));
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