c8y-openlayer
Version:
This module is designed to help integrate Openlayer with Cumulocity IoT
250 lines (191 loc) • 6.23 kB
JavaScript
var _ol_ = {};
/**
* Constants defined with the define tag cannot be changed in application
* code, but can be set at compile time.
* Some reduce the size of the build in advanced compile mode.
*/
/**
* @define {boolean} Assume touch. Default is `false`.
*/
_ol_.ASSUME_TOUCH = false;
/**
* TODO: rename this to something having to do with tile grids
* see https://github.com/openlayers/openlayers/issues/2076
* @define {number} Default maximum zoom for default tile grids.
*/
_ol_.DEFAULT_MAX_ZOOM = 42;
/**
* @define {number} Default min zoom level for the map view. Default is `0`.
*/
_ol_.DEFAULT_MIN_ZOOM = 0;
/**
* @define {number} Default maximum allowed threshold (in pixels) for
* reprojection triangulation. Default is `0.5`.
*/
_ol_.DEFAULT_RASTER_REPROJECTION_ERROR_THRESHOLD = 0.5;
/**
* @define {number} Default tile size.
*/
_ol_.DEFAULT_TILE_SIZE = 256;
/**
* @define {string} Default WMS version.
*/
_ol_.DEFAULT_WMS_VERSION = '1.3.0';
/**
* @define {boolean} Enable the Canvas renderer. Default is `true`. Setting
* this to false at compile time in advanced mode removes all code
* supporting the Canvas renderer from the build.
*/
_ol_.ENABLE_CANVAS = true;
/**
* @define {boolean} Enable integration with the Proj4js library. Default is
* `true`.
*/
_ol_.ENABLE_PROJ4JS = true;
/**
* @define {boolean} Enable automatic reprojection of raster sources. Default is
* `true`.
*/
_ol_.ENABLE_RASTER_REPROJECTION = true;
/**
* @define {boolean} Enable the WebGL renderer. Default is `true`. Setting
* this to false at compile time in advanced mode removes all code
* supporting the WebGL renderer from the build.
*/
_ol_.ENABLE_WEBGL = true;
/**
* @define {boolean} Include debuggable shader sources. Default is `true`.
* This should be set to `false` for production builds (if `ol.ENABLE_WEBGL`
* is `true`).
*/
_ol_.DEBUG_WEBGL = true;
/**
* @define {number} The size in pixels of the first atlas image. Default is
* `256`.
*/
_ol_.INITIAL_ATLAS_SIZE = 256;
/**
* @define {number} The maximum size in pixels of atlas images. Default is
* `-1`, meaning it is not used (and `ol.WEBGL_MAX_TEXTURE_SIZE` is
* used instead).
*/
_ol_.MAX_ATLAS_SIZE = -1;
/**
* @define {number} Maximum mouse wheel delta.
*/
_ol_.MOUSEWHEELZOOM_MAXDELTA = 1;
/**
* @define {number} Maximum width and/or height extent ratio that determines
* when the overview map should be zoomed out.
*/
_ol_.OVERVIEWMAP_MAX_RATIO = 0.75;
/**
* @define {number} Minimum width and/or height extent ratio that determines
* when the overview map should be zoomed in.
*/
_ol_.OVERVIEWMAP_MIN_RATIO = 0.1;
/**
* @define {number} Maximum number of source tiles for raster reprojection of
* a single tile.
* If too many source tiles are determined to be loaded to create a single
* reprojected tile the browser can become unresponsive or even crash.
* This can happen if the developer defines projections improperly and/or
* with unlimited extents.
* If too many tiles are required, no tiles are loaded and
* `ol.TileState.ERROR` state is set. Default is `100`.
*/
_ol_.RASTER_REPROJECTION_MAX_SOURCE_TILES = 100;
/**
* @define {number} Maximum number of subdivision steps during raster
* reprojection triangulation. Prevents high memory usage and large
* number of proj4 calls (for certain transformations and areas).
* At most `2*(2^this)` triangles are created for each triangulated
* extent (tile/image). Default is `10`.
*/
_ol_.RASTER_REPROJECTION_MAX_SUBDIVISION = 10;
/**
* @define {number} Maximum allowed size of triangle relative to world width.
* When transforming corners of world extent between certain projections,
* the resulting triangulation seems to have zero error and no subdivision
* is performed.
* If the triangle width is more than this (relative to world width; 0-1),
* subdivison is forced (up to `ol.RASTER_REPROJECTION_MAX_SUBDIVISION`).
* Default is `0.25`.
*/
_ol_.RASTER_REPROJECTION_MAX_TRIANGLE_WIDTH = 0.25;
/**
* @define {number} Tolerance for geometry simplification in device pixels.
*/
_ol_.SIMPLIFY_TOLERANCE = 0.5;
/**
* @define {number} Texture cache high water mark.
*/
_ol_.WEBGL_TEXTURE_CACHE_HIGH_WATER_MARK = 1024;
/**
* @define {string} OpenLayers version.
*/
_ol_.VERSION = 'v4.6.4';
/**
* The maximum supported WebGL texture size in pixels. If WebGL is not
* supported, the value is set to `undefined`.
* @const
* @type {number|undefined}
*/
_ol_.WEBGL_MAX_TEXTURE_SIZE; // value is set in `ol.has`
/**
* List of supported WebGL extensions.
* @const
* @type {Array.<string>}
*/
_ol_.WEBGL_EXTENSIONS; // value is set in `ol.has`
/**
* Inherit the prototype methods from one constructor into another.
*
* Usage:
*
* function ParentClass(a, b) { }
* ParentClass.prototype.foo = function(a) { }
*
* function ChildClass(a, b, c) {
* // Call parent constructor
* ParentClass.call(this, a, b);
* }
* ol.inherits(ChildClass, ParentClass);
*
* var child = new ChildClass('a', 'b', 'see');
* child.foo(); // This works.
*
* @param {!Function} childCtor Child constructor.
* @param {!Function} parentCtor Parent constructor.
* @function
* @api
*/
_ol_.inherits = function(childCtor, parentCtor) {
childCtor.prototype = Object.create(parentCtor.prototype);
childCtor.prototype.constructor = childCtor;
};
/**
* A reusable function, used e.g. as a default for callbacks.
*
* @return {undefined} Nothing.
*/
_ol_.nullFunction = function() {};
/**
* Gets a unique ID for an object. This mutates the object so that further calls
* with the same object as a parameter returns the same value. Unique IDs are generated
* as a strictly increasing sequence. Adapted from goog.getUid.
*
* @param {Object} obj The object to get the unique ID for.
* @return {number} The unique ID for the object.
*/
_ol_.getUid = function(obj) {
return obj.ol_uid ||
(obj.ol_uid = ++_ol_.uidCounter_);
};
/**
* Counter for getUid.
* @type {number}
* @private
*/
_ol_.uidCounter_ = 0;
export default _ol_;