94a3504252
This reverts commit 5a940c207a.
Detection of full screeen support requires the document to have a body.
This is not the case if ol3 is loaded in the head. Therefore, defer the
test for full screen support to when it is needed.
189 lines
3.9 KiB
JavaScript
189 lines
3.9 KiB
JavaScript
goog.provide('ol.BrowserFeature');
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goog.require('goog.dom');
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goog.require('goog.dom.TagName');
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goog.require('goog.userAgent');
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goog.require('ol.webgl');
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/**
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* @define {boolean} Assume touch.
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*/
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ol.ASSUME_TOUCH = false;
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/**
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* @define {boolean} Whether to enable canvas.
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*/
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ol.ENABLE_CANVAS = true;
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/**
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* @define {boolean} Whether to enable DOM.
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*/
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ol.ENABLE_DOM = true;
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/**
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* @define {boolean} Whether to enable rendering of image layers.
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*/
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ol.ENABLE_IMAGE = true;
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/**
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* @define {boolean} Whether to enable rendering of tile layers.
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*/
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ol.ENABLE_TILE = true;
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/**
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* @define {boolean} Whether to enable rendering of vector layers.
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*/
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ol.ENABLE_VECTOR = true;
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/**
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* @define {boolean} Whether to enable WebGL.
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*/
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ol.ENABLE_WEBGL = true;
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/**
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* @define {boolean} Whether to support legacy IE (7-8).
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*/
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ol.LEGACY_IE_SUPPORT = false;
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/**
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* Whether the current browser is legacy IE
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* @const
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* @type {boolean}
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*/
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ol.IS_LEGACY_IE = goog.userAgent.IE &&
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!goog.userAgent.isVersionOrHigher('9.0') && goog.userAgent.VERSION !== '';
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/**
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* The ratio between physical pixels and device-independent pixels
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* (dips) on the device (`window.devicePixelRatio`).
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* @const
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* @type {number}
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* @todo stability experimental
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*/
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ol.BrowserFeature.DEVICE_PIXEL_RATIO = goog.global.devicePixelRatio || 1;
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/**
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* True if the browser supports ArrayBuffers.
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* @type {boolean}
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* @todo stability experimental
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*/
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ol.BrowserFeature.HAS_ARRAY_BUFFER = 'ArrayBuffer' in goog.global;
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/**
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* True if the browser's Canvas implementation implements {get,set}LineDash.
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* @type {boolean}
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* @todo stability experimental
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*/
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ol.BrowserFeature.HAS_CANVAS_LINE_DASH = false;
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/**
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* True if browser supports Canvas.
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* @const
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* @type {boolean}
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* @todo stability experimental
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*/
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ol.BrowserFeature.HAS_CANVAS = ol.ENABLE_CANVAS && (
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/**
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* @return {boolean} Canvas supported.
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*/
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function() {
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if (!('HTMLCanvasElement' in goog.global)) {
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return false;
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}
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try {
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var canvas = /** @type {HTMLCanvasElement} */
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(goog.dom.createElement(goog.dom.TagName.CANVAS));
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var context = /** @type {CanvasRenderingContext2D} */
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(canvas.getContext('2d'));
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if (goog.isNull(context)) {
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return false;
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} else {
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if (goog.isDef(context.setLineDash)) {
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ol.BrowserFeature.HAS_CANVAS_LINE_DASH = true;
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}
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return true;
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}
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} catch (e) {
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return false;
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}
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})();
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/**
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* Indicates if DeviceOrientation is supported in the user's browser.
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* @const
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* @type {boolean}
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* @todo stability experimental
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*/
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ol.BrowserFeature.HAS_DEVICE_ORIENTATION =
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'DeviceOrientationEvent' in goog.global;
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/**
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* True if browser supports DOM.
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* @const
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* @type {boolean}
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* @todo stability experimental
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*/
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ol.BrowserFeature.HAS_DOM = ol.ENABLE_DOM;
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/**
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* Is HTML5 geolocation supported in the current browser?
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* @const
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* @type {boolean}
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* @todo stability experimental
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*/
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ol.BrowserFeature.HAS_GEOLOCATION = 'geolocation' in goog.global.navigator;
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/**
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* True if browser supports touch events.
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* @const
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* @type {boolean}
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* @todo stability experimental
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*/
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ol.BrowserFeature.HAS_TOUCH = ol.ASSUME_TOUCH ||
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(goog.global.document &&
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'ontouchstart' in goog.global.document.documentElement) ||
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!!(goog.global.navigator.msPointerEnabled);
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/**
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* True if browser supports WebGL.
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* @const
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* @type {boolean}
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* @todo stability experimental
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*/
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ol.BrowserFeature.HAS_WEBGL = ol.ENABLE_WEBGL && (
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/**
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* @return {boolean} WebGL supported.
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*/
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function() {
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if (!('WebGLRenderingContext' in goog.global)) {
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return false;
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}
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try {
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var canvas = /** @type {HTMLCanvasElement} */
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(goog.dom.createElement(goog.dom.TagName.CANVAS));
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return !goog.isNull(ol.webgl.getContext(canvas, {
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failIfMajorPerformanceCaveat: true
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}));
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} catch (e) {
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return false;
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}
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})();
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