Rename ol.browserfeature to ol.has

2014-08-21 14:46:10 -06:00
parent 403e87f697
commit 947b049799
21 changed files with 66 additions and 66 deletions
--- a/src/ol/has.js
+++ b/src/ol/has.js
@@ -0,0 +1,141 @@
+goog.provide('ol.has');
+
+goog.require('goog.dom');
+goog.require('goog.dom.TagName');
+goog.require('ol');
+goog.require('ol.dom');
+goog.require('ol.webgl');
+
+
+/**
+ * The ratio between physical pixels and device-independent pixels
+ * (dips) on the device (`window.devicePixelRatio`).
+ * @const
+ * @type {number}
+ * @api
+ */
+ol.has.DEVICE_PIXEL_RATIO = goog.global.devicePixelRatio || 1;
+
+
+/**
+ * True if the browser supports ArrayBuffers.
+ * @const
+ * @type {boolean}
+ */
+ol.has.ARRAY_BUFFER = 'ArrayBuffer' in goog.global;
+
+
+/**
+ * True if the browser's Canvas implementation implements {get,set}LineDash.
+ * @type {boolean}
+ */
+ol.has.CANVAS_LINE_DASH = false;
+
+
+/**
+ * True if browser supports Canvas.
+ * @const
+ * @type {boolean}
+ * @api
+ */
+ol.has.CANVAS = ol.ENABLE_CANVAS && (
+    /**
+     * @return {boolean} Canvas supported.
+     */
+    function() {
+      if (!('HTMLCanvasElement' in goog.global)) {
+        return false;
+      }
+      try {
+        var context = ol.dom.createCanvasContext2D();
+        if (goog.isNull(context)) {
+          return false;
+        } else {
+          if (goog.isDef(context.setLineDash)) {
+            ol.has.CANVAS_LINE_DASH = true;
+          }
+          return true;
+        }
+      } catch (e) {
+        return false;
+      }
+    })();
+
+
+/**
+ * Indicates if DeviceOrientation is supported in the user's browser.
+ * @const
+ * @type {boolean}
+ * @api
+ */
+ol.has.DEVICE_ORIENTATION =
+    'DeviceOrientationEvent' in goog.global;
+
+
+/**
+ * True if browser supports DOM.
+ * @const
+ * @type {boolean}
+ */
+ol.has.DOM = ol.ENABLE_DOM;
+
+
+/**
+ * Is HTML5 geolocation supported in the current browser?
+ * @const
+ * @type {boolean}
+ * @api
+ */
+ol.has.GEOLOCATION = 'geolocation' in goog.global.navigator;
+
+
+/**
+ * True if browser supports touch events.
+ * @const
+ * @type {boolean}
+ * @api
+ */
+ol.has.TOUCH = ol.ASSUME_TOUCH || 'ontouchstart' in goog.global;
+
+
+/**
+ * True if browser supports pointer events.
+ * @const
+ * @type {boolean}
+ */
+ol.has.POINTER = 'PointerEvent' in goog.global;
+
+
+/**
+ * True if browser supports ms pointer events (IE 10).
+ * @const
+ * @type {boolean}
+ */
+ol.has.MSPOINTER =
+    !!(goog.global.navigator.msPointerEnabled);
+
+
+/**
+ * True if browser supports WebGL.
+ * @const
+ * @type {boolean}
+ * @api
+ */
+ol.has.WEBGL = ol.ENABLE_WEBGL && (
+    /**
+     * @return {boolean} WebGL supported.
+     */
+    function() {
+      if (!('WebGLRenderingContext' in goog.global)) {
+        return false;
+      }
+      try {
+        var canvas = /** @type {HTMLCanvasElement} */
+            (goog.dom.createElement(goog.dom.TagName.CANVAS));
+        return !goog.isNull(ol.webgl.getContext(canvas, {
+          failIfMajorPerformanceCaveat: true
+        }));
+      } catch (e) {
+        return false;
+      }
+    })();