WebVR API Implementation, r=larsbergstrom

tests/html/webvr/js/third-party/wglu/wglu-url.js

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+/*
+Copyright (c) 2015, Brandon Jones.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+*/
+
+/*
+Provides a simple way to get values from the query string if they're present
+and use a default value if not. Not strictly a "WebGL" utility, but I use it
+frequently enough for debugging that I wanted to include it here.
+
+Example:
+For the URL http://example.com/index.html?particleCount=1000
+
+WGLUUrl.getInt("particleCount", 100); // URL overrides, returns 1000
+WGLUUrl.getInt("particleSize", 10); // Not in URL, returns default of 10
+*/
+var WGLUUrl = (function() {
+
+  "use strict";
+
+  var urlArgs = null;
+
+  function ensureArgsCached() {
+    if (!urlArgs) {
+      urlArgs = {};
+      var query = window.location.search.substring(1);
+      var vars = query.split("&");
+      for (var i = 0; i < vars.length; i++) {
+        var pair = vars[i].split("=");
+        urlArgs[pair[0].toLowerCase()] = unescape(pair[1]);
+      }
+    }
+  }
+
+  function getString(name, defaultValue) {
+    ensureArgsCached();
+    var lcaseName = name.toLowerCase();
+    if (lcaseName in urlArgs) {
+      return urlArgs[lcaseName];
+    }
+    return defaultValue;
+  }
+
+  function getInt(name, defaultValue) {
+    ensureArgsCached();
+    var lcaseName = name.toLowerCase();
+    if (lcaseName in urlArgs) {
+      return parseInt(urlArgs[lcaseName], 10);
+    }
+    return defaultValue;
+  }
+
+  function getFloat(name, defaultValue) {
+    ensureArgsCached();
+    var lcaseName = name.toLowerCase();
+    if (lcaseName in urlArgs) {
+      return parseFloat(urlArgs[lcaseName]);
+    }
+    return defaultValue;
+  }
+
+  function getBool(name, defaultValue) {
+    ensureArgsCached();
+    var lcaseName = name.toLowerCase();
+    if (lcaseName in urlArgs) {
+      return parseInt(urlArgs[lcaseName], 10) != 0;
+    }
+    return defaultValue;
+  }
+
+  return {
+    getString: getString,
+    getInt: getInt,
+    getFloat: getFloat,
+    getBool: getBool
+  };
+})();