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Diffstat (limited to 'misc/openlayers/lib/OpenLayers/Util.js')
| -rw-r--r-- | misc/openlayers/lib/OpenLayers/Util.js | 1773 |
1 files changed, 0 insertions, 1773 deletions
diff --git a/misc/openlayers/lib/OpenLayers/Util.js b/misc/openlayers/lib/OpenLayers/Util.js deleted file mode 100644 index f659d3e..0000000 --- a/misc/openlayers/lib/OpenLayers/Util.js +++ /dev/null @@ -1,1773 +0,0 @@ -/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for - * full list of contributors). Published under the 2-clause BSD license. - * See license.txt in the OpenLayers distribution or repository for the - * full text of the license. */ - -/** - * @requires OpenLayers/BaseTypes.js - * @requires OpenLayers/BaseTypes/Bounds.js - * @requires OpenLayers/BaseTypes/Element.js - * @requires OpenLayers/BaseTypes/LonLat.js - * @requires OpenLayers/BaseTypes/Pixel.js - * @requires OpenLayers/BaseTypes/Size.js - * @requires OpenLayers/Lang.js - */ - -/** - * Namespace: Util - */ -OpenLayers.Util = OpenLayers.Util || {}; - -/** - * Function: getElement - * This is the old $() from prototype - * - * Parameters: - * e - {String or DOMElement or Window} - * - * Returns: - * {Array(DOMElement) or DOMElement} - */ -OpenLayers.Util.getElement = function() { - var elements = []; - - for (var i=0, len=arguments.length; i<len; i++) { - var element = arguments[i]; - if (typeof element == 'string') { - element = document.getElementById(element); - } - if (arguments.length == 1) { - return element; - } - elements.push(element); - } - return elements; -}; - -/** - * Function: isElement - * A cross-browser implementation of "e instanceof Element". - * - * Parameters: - * o - {Object} The object to test. - * - * Returns: - * {Boolean} - */ -OpenLayers.Util.isElement = function(o) { - return !!(o && o.nodeType === 1); -}; - -/** - * Function: isArray - * Tests that the provided object is an array. - * This test handles the cross-IFRAME case not caught - * by "a instanceof Array" and should be used instead. - * - * Parameters: - * a - {Object} the object test. - * - * Returns: - * {Boolean} true if the object is an array. - */ -OpenLayers.Util.isArray = function(a) { - return (Object.prototype.toString.call(a) === '[object Array]'); -}; - -/** - * Function: removeItem - * Remove an object from an array. Iterates through the array - * to find the item, then removes it. - * - * Parameters: - * array - {Array} - * item - {Object} - * - * Returns: - * {Array} A reference to the array - */ -OpenLayers.Util.removeItem = function(array, item) { - for(var i = array.length - 1; i >= 0; i--) { - if(array[i] == item) { - array.splice(i,1); - //break;more than once?? - } - } - return array; -}; - -/** - * Function: indexOf - * Seems to exist already in FF, but not in MOZ. - * - * Parameters: - * array - {Array} - * obj - {*} - * - * Returns: - * {Integer} The index at which the first object was found in the array. - * If not found, returns -1. - */ -OpenLayers.Util.indexOf = function(array, obj) { - // use the build-in function if available. - if (typeof array.indexOf == "function") { - return array.indexOf(obj); - } else { - for (var i = 0, len = array.length; i < len; i++) { - if (array[i] == obj) { - return i; - } - } - return -1; - } -}; - - -/** - * Property: dotless - * {RegExp} - * Compiled regular expression to match dots ("."). This is used for replacing - * dots in identifiers. Because object identifiers are frequently used for - * DOM element identifiers by the library, we avoid using dots to make for - * more sensible CSS selectors. - * - * TODO: Use a module pattern to avoid bloating the API with stuff like this. - */ -OpenLayers.Util.dotless = /\./g; - -/** - * Function: modifyDOMElement - * - * Modifies many properties of a DOM element all at once. Passing in - * null to an individual parameter will avoid setting the attribute. - * - * Parameters: - * element - {DOMElement} DOM element to modify. - * id - {String} The element id attribute to set. Note that dots (".") will be - * replaced with underscore ("_") in setting the element id. - * px - {<OpenLayers.Pixel>|Object} The element left and top position, - * OpenLayers.Pixel or an object with - * a 'x' and 'y' properties. - * sz - {<OpenLayers.Size>|Object} The element width and height, - * OpenLayers.Size or an object with a - * 'w' and 'h' properties. - * position - {String} The position attribute. eg: absolute, - * relative, etc. - * border - {String} The style.border attribute. eg: - * solid black 2px - * overflow - {String} The style.overview attribute. - * opacity - {Float} Fractional value (0.0 - 1.0) - */ -OpenLayers.Util.modifyDOMElement = function(element, id, px, sz, position, - border, overflow, opacity) { - - if (id) { - element.id = id.replace(OpenLayers.Util.dotless, "_"); - } - if (px) { - element.style.left = px.x + "px"; - element.style.top = px.y + "px"; - } - if (sz) { - element.style.width = sz.w + "px"; - element.style.height = sz.h + "px"; - } - if (position) { - element.style.position = position; - } - if (border) { - element.style.border = border; - } - if (overflow) { - element.style.overflow = overflow; - } - if (parseFloat(opacity) >= 0.0 && parseFloat(opacity) < 1.0) { - element.style.filter = 'alpha(opacity=' + (opacity * 100) + ')'; - element.style.opacity = opacity; - } else if (parseFloat(opacity) == 1.0) { - element.style.filter = ''; - element.style.opacity = ''; - } -}; - -/** - * Function: createDiv - * Creates a new div and optionally set some standard attributes. - * Null may be passed to each parameter if you do not wish to - * set a particular attribute. - * Note - zIndex is NOT set on the resulting div. - * - * Parameters: - * id - {String} An identifier for this element. If no id is - * passed an identifier will be created - * automatically. Note that dots (".") will be replaced with - * underscore ("_") when generating ids. - * px - {<OpenLayers.Pixel>|Object} The element left and top position, - * OpenLayers.Pixel or an object with - * a 'x' and 'y' properties. - * sz - {<OpenLayers.Size>|Object} The element width and height, - * OpenLayers.Size or an object with a - * 'w' and 'h' properties. - * imgURL - {String} A url pointing to an image to use as a - * background image. - * position - {String} The style.position value. eg: absolute, - * relative etc. - * border - {String} The the style.border value. - * eg: 2px solid black - * overflow - {String} The style.overflow value. Eg. hidden - * opacity - {Float} Fractional value (0.0 - 1.0) - * - * Returns: - * {DOMElement} A DOM Div created with the specified attributes. - */ -OpenLayers.Util.createDiv = function(id, px, sz, imgURL, position, - border, overflow, opacity) { - - var dom = document.createElement('div'); - - if (imgURL) { - dom.style.backgroundImage = 'url(' + imgURL + ')'; - } - - //set generic properties - if (!id) { - id = OpenLayers.Util.createUniqueID("OpenLayersDiv"); - } - if (!position) { - position = "absolute"; - } - OpenLayers.Util.modifyDOMElement(dom, id, px, sz, position, - border, overflow, opacity); - - return dom; -}; - -/** - * Function: createImage - * Creates an img element with specific attribute values. - * - * Parameters: - * id - {String} The id field for the img. If none assigned one will be - * automatically generated. - * px - {<OpenLayers.Pixel>|Object} The element left and top position, - * OpenLayers.Pixel or an object with - * a 'x' and 'y' properties. - * sz - {<OpenLayers.Size>|Object} The element width and height, - * OpenLayers.Size or an object with a - * 'w' and 'h' properties. - * imgURL - {String} The url to use as the image source. - * position - {String} The style.position value. - * border - {String} The border to place around the image. - * opacity - {Float} Fractional value (0.0 - 1.0) - * delayDisplay - {Boolean} If true waits until the image has been - * loaded. - * - * Returns: - * {DOMElement} A DOM Image created with the specified attributes. - */ -OpenLayers.Util.createImage = function(id, px, sz, imgURL, position, border, - opacity, delayDisplay) { - - var image = document.createElement("img"); - - //set generic properties - if (!id) { - id = OpenLayers.Util.createUniqueID("OpenLayersDiv"); - } - if (!position) { - position = "relative"; - } - OpenLayers.Util.modifyDOMElement(image, id, px, sz, position, - border, null, opacity); - - if (delayDisplay) { - image.style.display = "none"; - function display() { - image.style.display = ""; - OpenLayers.Event.stopObservingElement(image); - } - OpenLayers.Event.observe(image, "load", display); - OpenLayers.Event.observe(image, "error", display); - } - - //set special properties - image.style.alt = id; - image.galleryImg = "no"; - if (imgURL) { - image.src = imgURL; - } - - return image; -}; - -/** - * Property: IMAGE_RELOAD_ATTEMPTS - * {Integer} How many times should we try to reload an image before giving up? - * Default is 0 - */ -OpenLayers.IMAGE_RELOAD_ATTEMPTS = 0; - -/** - * Property: alphaHackNeeded - * {Boolean} true if the png alpha hack is necessary and possible, false otherwise. - */ -OpenLayers.Util.alphaHackNeeded = null; - -/** - * Function: alphaHack - * Checks whether it's necessary (and possible) to use the png alpha - * hack which allows alpha transparency for png images under Internet - * Explorer. - * - * Returns: - * {Boolean} true if the png alpha hack is necessary and possible, false otherwise. - */ -OpenLayers.Util.alphaHack = function() { - if (OpenLayers.Util.alphaHackNeeded == null) { - var arVersion = navigator.appVersion.split("MSIE"); - var version = parseFloat(arVersion[1]); - var filter = false; - - // IEs4Lin dies when trying to access document.body.filters, because - // the property is there, but requires a DLL that can't be provided. This - // means that we need to wrap this in a try/catch so that this can - // continue. - - try { - filter = !!(document.body.filters); - } catch (e) {} - - OpenLayers.Util.alphaHackNeeded = (filter && - (version >= 5.5) && (version < 7)); - } - return OpenLayers.Util.alphaHackNeeded; -}; - -/** - * Function: modifyAlphaImageDiv - * - * Parameters: - * div - {DOMElement} Div containing Alpha-adjusted Image - * id - {String} - * px - {<OpenLayers.Pixel>|Object} OpenLayers.Pixel or an object with - * a 'x' and 'y' properties. - * sz - {<OpenLayers.Size>|Object} OpenLayers.Size or an object with - * a 'w' and 'h' properties. - * imgURL - {String} - * position - {String} - * border - {String} - * sizing - {String} 'crop', 'scale', or 'image'. Default is "scale" - * opacity - {Float} Fractional value (0.0 - 1.0) - */ -OpenLayers.Util.modifyAlphaImageDiv = function(div, id, px, sz, imgURL, - position, border, sizing, - opacity) { - - OpenLayers.Util.modifyDOMElement(div, id, px, sz, position, - null, null, opacity); - - var img = div.childNodes[0]; - - if (imgURL) { - img.src = imgURL; - } - OpenLayers.Util.modifyDOMElement(img, div.id + "_innerImage", null, sz, - "relative", border); - - if (OpenLayers.Util.alphaHack()) { - if(div.style.display != "none") { - div.style.display = "inline-block"; - } - if (sizing == null) { - sizing = "scale"; - } - - div.style.filter = "progid:DXImageTransform.Microsoft" + - ".AlphaImageLoader(src='" + img.src + "', " + - "sizingMethod='" + sizing + "')"; - if (parseFloat(div.style.opacity) >= 0.0 && - parseFloat(div.style.opacity) < 1.0) { - div.style.filter += " alpha(opacity=" + div.style.opacity * 100 + ")"; - } - - img.style.filter = "alpha(opacity=0)"; - } -}; - -/** - * Function: createAlphaImageDiv - * - * Parameters: - * id - {String} - * px - {<OpenLayers.Pixel>|Object} OpenLayers.Pixel or an object with - * a 'x' and 'y' properties. - * sz - {<OpenLayers.Size>|Object} OpenLayers.Size or an object with - * a 'w' and 'h' properties. - * imgURL - {String} - * position - {String} - * border - {String} - * sizing - {String} 'crop', 'scale', or 'image'. Default is "scale" - * opacity - {Float} Fractional value (0.0 - 1.0) - * delayDisplay - {Boolean} If true waits until the image has been - * loaded. - * - * Returns: - * {DOMElement} A DOM Div created with a DOM Image inside it. If the hack is - * needed for transparency in IE, it is added. - */ -OpenLayers.Util.createAlphaImageDiv = function(id, px, sz, imgURL, - position, border, sizing, - opacity, delayDisplay) { - - var div = OpenLayers.Util.createDiv(); - var img = OpenLayers.Util.createImage(null, null, null, null, null, null, - null, delayDisplay); - img.className = "olAlphaImg"; - div.appendChild(img); - - OpenLayers.Util.modifyAlphaImageDiv(div, id, px, sz, imgURL, position, - border, sizing, opacity); - - return div; -}; - - -/** - * Function: upperCaseObject - * Creates a new hashtable and copies over all the keys from the - * passed-in object, but storing them under an uppercased - * version of the key at which they were stored. - * - * Parameters: - * object - {Object} - * - * Returns: - * {Object} A new Object with all the same keys but uppercased - */ -OpenLayers.Util.upperCaseObject = function (object) { - var uObject = {}; - for (var key in object) { - uObject[key.toUpperCase()] = object[key]; - } - return uObject; -}; - -/** - * Function: applyDefaults - * Takes an object and copies any properties that don't exist from - * another properties, by analogy with OpenLayers.Util.extend() from - * Prototype.js. - * - * Parameters: - * to - {Object} The destination object. - * from - {Object} The source object. Any properties of this object that - * are undefined in the to object will be set on the to object. - * - * Returns: - * {Object} A reference to the to object. Note that the to argument is modified - * in place and returned by this function. - */ -OpenLayers.Util.applyDefaults = function (to, from) { - to = to || {}; - /* - * FF/Windows < 2.0.0.13 reports "Illegal operation on WrappedNative - * prototype object" when calling hawOwnProperty if the source object is an - * instance of window.Event. - */ - var fromIsEvt = typeof window.Event == "function" - && from instanceof window.Event; - - for (var key in from) { - if (to[key] === undefined || - (!fromIsEvt && from.hasOwnProperty - && from.hasOwnProperty(key) && !to.hasOwnProperty(key))) { - to[key] = from[key]; - } - } - /** - * IE doesn't include the toString property when iterating over an object's - * properties with the for(property in object) syntax. Explicitly check if - * the source has its own toString property. - */ - if(!fromIsEvt && from && from.hasOwnProperty - && from.hasOwnProperty('toString') && !to.hasOwnProperty('toString')) { - to.toString = from.toString; - } - - return to; -}; - -/** - * Function: getParameterString - * - * Parameters: - * params - {Object} - * - * Returns: - * {String} A concatenation of the properties of an object in - * http parameter notation. - * (ex. <i>"key1=value1&key2=value2&key3=value3"</i>) - * If a parameter is actually a list, that parameter will then - * be set to a comma-seperated list of values (foo,bar) instead - * of being URL escaped (foo%3Abar). - */ -OpenLayers.Util.getParameterString = function(params) { - var paramsArray = []; - - for (var key in params) { - var value = params[key]; - if ((value != null) && (typeof value != 'function')) { - var encodedValue; - if (typeof value == 'object' && value.constructor == Array) { - /* value is an array; encode items and separate with "," */ - var encodedItemArray = []; - var item; - for (var itemIndex=0, len=value.length; itemIndex<len; itemIndex++) { - item = value[itemIndex]; - encodedItemArray.push(encodeURIComponent( - (item === null || item === undefined) ? "" : item) - ); - } - encodedValue = encodedItemArray.join(","); - } - else { - /* value is a string; simply encode */ - encodedValue = encodeURIComponent(value); - } - paramsArray.push(encodeURIComponent(key) + "=" + encodedValue); - } - } - - return paramsArray.join("&"); -}; - -/** - * Function: urlAppend - * Appends a parameter string to a url. This function includes the logic for - * using the appropriate character (none, & or ?) to append to the url before - * appending the param string. - * - * Parameters: - * url - {String} The url to append to - * paramStr - {String} The param string to append - * - * Returns: - * {String} The new url - */ -OpenLayers.Util.urlAppend = function(url, paramStr) { - var newUrl = url; - if(paramStr) { - var parts = (url + " ").split(/[?&]/); - newUrl += (parts.pop() === " " ? - paramStr : - parts.length ? "&" + paramStr : "?" + paramStr); - } - return newUrl; -}; - -/** - * Function: getImagesLocation - * - * Returns: - * {String} The fully formatted image location string - */ -OpenLayers.Util.getImagesLocation = function() { - return OpenLayers.ImgPath || (OpenLayers._getScriptLocation() + "img/"); -}; - -/** - * Function: getImageLocation - * - * Returns: - * {String} The fully formatted location string for a specified image - */ -OpenLayers.Util.getImageLocation = function(image) { - return OpenLayers.Util.getImagesLocation() + image; -}; - - -/** - * Function: Try - * Execute functions until one of them doesn't throw an error. - * Capitalized because "try" is a reserved word in JavaScript. - * Taken directly from OpenLayers.Util.Try() - * - * Parameters: - * [*] - {Function} Any number of parameters may be passed to Try() - * It will attempt to execute each of them until one of them - * successfully executes. - * If none executes successfully, returns null. - * - * Returns: - * {*} The value returned by the first successfully executed function. - */ -OpenLayers.Util.Try = function() { - var returnValue = null; - - for (var i=0, len=arguments.length; i<len; i++) { - var lambda = arguments[i]; - try { - returnValue = lambda(); - break; - } catch (e) {} - } - - return returnValue; -}; - -/** - * Function: getXmlNodeValue - * - * Parameters: - * node - {XMLNode} - * - * Returns: - * {String} The text value of the given node, without breaking in firefox or IE - */ -OpenLayers.Util.getXmlNodeValue = function(node) { - var val = null; - OpenLayers.Util.Try( - function() { - val = node.text; - if (!val) { - val = node.textContent; - } - if (!val) { - val = node.firstChild.nodeValue; - } - }, - function() { - val = node.textContent; - }); - return val; -}; - -/** - * Function: mouseLeft - * - * Parameters: - * evt - {Event} - * div - {HTMLDivElement} - * - * Returns: - * {Boolean} - */ -OpenLayers.Util.mouseLeft = function (evt, div) { - // start with the element to which the mouse has moved - var target = (evt.relatedTarget) ? evt.relatedTarget : evt.toElement; - // walk up the DOM tree. - while (target != div && target != null) { - target = target.parentNode; - } - // if the target we stop at isn't the div, then we've left the div. - return (target != div); -}; - -/** - * Property: precision - * {Number} The number of significant digits to retain to avoid - * floating point precision errors. - * - * We use 14 as a "safe" default because, although IEEE 754 double floats - * (standard on most modern operating systems) support up to about 16 - * significant digits, 14 significant digits are sufficient to represent - * sub-millimeter accuracy in any coordinate system that anyone is likely to - * use with OpenLayers. - * - * If DEFAULT_PRECISION is set to 0, the original non-truncating behavior - * of OpenLayers <2.8 is preserved. Be aware that this will cause problems - * with certain projections, e.g. spherical Mercator. - * - */ -OpenLayers.Util.DEFAULT_PRECISION = 14; - -/** - * Function: toFloat - * Convenience method to cast an object to a Number, rounded to the - * desired floating point precision. - * - * Parameters: - * number - {Number} The number to cast and round. - * precision - {Number} An integer suitable for use with - * Number.toPrecision(). Defaults to OpenLayers.Util.DEFAULT_PRECISION. - * If set to 0, no rounding is performed. - * - * Returns: - * {Number} The cast, rounded number. - */ -OpenLayers.Util.toFloat = function (number, precision) { - if (precision == null) { - precision = OpenLayers.Util.DEFAULT_PRECISION; - } - if (typeof number !== "number") { - number = parseFloat(number); - } - return precision === 0 ? number : - parseFloat(number.toPrecision(precision)); -}; - -/** - * Function: rad - * - * Parameters: - * x - {Float} - * - * Returns: - * {Float} - */ -OpenLayers.Util.rad = function(x) {return x*Math.PI/180;}; - -/** - * Function: deg - * - * Parameters: - * x - {Float} - * - * Returns: - * {Float} - */ -OpenLayers.Util.deg = function(x) {return x*180/Math.PI;}; - -/** - * Property: VincentyConstants - * {Object} Constants for Vincenty functions. - */ -OpenLayers.Util.VincentyConstants = { - a: 6378137, - b: 6356752.3142, - f: 1/298.257223563 -}; - -/** - * APIFunction: distVincenty - * Given two objects representing points with geographic coordinates, this - * calculates the distance between those points on the surface of an - * ellipsoid. - * - * Parameters: - * p1 - {<OpenLayers.LonLat>} (or any object with both .lat, .lon properties) - * p2 - {<OpenLayers.LonLat>} (or any object with both .lat, .lon properties) - * - * Returns: - * {Float} The distance (in km) between the two input points as measured on an - * ellipsoid. Note that the input point objects must be in geographic - * coordinates (decimal degrees) and the return distance is in kilometers. - */ -OpenLayers.Util.distVincenty = function(p1, p2) { - var ct = OpenLayers.Util.VincentyConstants; - var a = ct.a, b = ct.b, f = ct.f; - - var L = OpenLayers.Util.rad(p2.lon - p1.lon); - var U1 = Math.atan((1-f) * Math.tan(OpenLayers.Util.rad(p1.lat))); - var U2 = Math.atan((1-f) * Math.tan(OpenLayers.Util.rad(p2.lat))); - var sinU1 = Math.sin(U1), cosU1 = Math.cos(U1); - var sinU2 = Math.sin(U2), cosU2 = Math.cos(U2); - var lambda = L, lambdaP = 2*Math.PI; - var iterLimit = 20; - while (Math.abs(lambda-lambdaP) > 1e-12 && --iterLimit>0) { - var sinLambda = Math.sin(lambda), cosLambda = Math.cos(lambda); - var sinSigma = Math.sqrt((cosU2*sinLambda) * (cosU2*sinLambda) + - (cosU1*sinU2-sinU1*cosU2*cosLambda) * (cosU1*sinU2-sinU1*cosU2*cosLambda)); - if (sinSigma==0) { - return 0; // co-incident points - } - var cosSigma = sinU1*sinU2 + cosU1*cosU2*cosLambda; - var sigma = Math.atan2(sinSigma, cosSigma); - var alpha = Math.asin(cosU1 * cosU2 * sinLambda / sinSigma); - var cosSqAlpha = Math.cos(alpha) * Math.cos(alpha); - var cos2SigmaM = cosSigma - 2*sinU1*sinU2/cosSqAlpha; - var C = f/16*cosSqAlpha*(4+f*(4-3*cosSqAlpha)); - lambdaP = lambda; - lambda = L + (1-C) * f * Math.sin(alpha) * - (sigma + C*sinSigma*(cos2SigmaM+C*cosSigma*(-1+2*cos2SigmaM*cos2SigmaM))); - } - if (iterLimit==0) { - return NaN; // formula failed to converge - } - var uSq = cosSqAlpha * (a*a - b*b) / (b*b); - var A = 1 + uSq/16384*(4096+uSq*(-768+uSq*(320-175*uSq))); - var B = uSq/1024 * (256+uSq*(-128+uSq*(74-47*uSq))); - var deltaSigma = B*sinSigma*(cos2SigmaM+B/4*(cosSigma*(-1+2*cos2SigmaM*cos2SigmaM)- - B/6*cos2SigmaM*(-3+4*sinSigma*sinSigma)*(-3+4*cos2SigmaM*cos2SigmaM))); - var s = b*A*(sigma-deltaSigma); - var d = s.toFixed(3)/1000; // round to 1mm precision - return d; -}; - -/** - * APIFunction: destinationVincenty - * Calculate destination point given start point lat/long (numeric degrees), - * bearing (numeric degrees) & distance (in m). - * Adapted from Chris Veness work, see - * http://www.movable-type.co.uk/scripts/latlong-vincenty-direct.html - * - * Parameters: - * lonlat - {<OpenLayers.LonLat>} (or any object with both .lat, .lon - * properties) The start point. - * brng - {Float} The bearing (degrees). - * dist - {Float} The ground distance (meters). - * - * Returns: - * {<OpenLayers.LonLat>} The destination point. - */ -OpenLayers.Util.destinationVincenty = function(lonlat, brng, dist) { - var u = OpenLayers.Util; - var ct = u.VincentyConstants; - var a = ct.a, b = ct.b, f = ct.f; - - var lon1 = lonlat.lon; - var lat1 = lonlat.lat; - - var s = dist; - var alpha1 = u.rad(brng); - var sinAlpha1 = Math.sin(alpha1); - var cosAlpha1 = Math.cos(alpha1); - - var tanU1 = (1-f) * Math.tan(u.rad(lat1)); - var cosU1 = 1 / Math.sqrt((1 + tanU1*tanU1)), sinU1 = tanU1*cosU1; - var sigma1 = Math.atan2(tanU1, cosAlpha1); - var sinAlpha = cosU1 * sinAlpha1; - var cosSqAlpha = 1 - sinAlpha*sinAlpha; - var uSq = cosSqAlpha * (a*a - b*b) / (b*b); - var A = 1 + uSq/16384*(4096+uSq*(-768+uSq*(320-175*uSq))); - var B = uSq/1024 * (256+uSq*(-128+uSq*(74-47*uSq))); - - var sigma = s / (b*A), sigmaP = 2*Math.PI; - while (Math.abs(sigma-sigmaP) > 1e-12) { - var cos2SigmaM = Math.cos(2*sigma1 + sigma); - var sinSigma = Math.sin(sigma); - var cosSigma = Math.cos(sigma); - var deltaSigma = B*sinSigma*(cos2SigmaM+B/4*(cosSigma*(-1+2*cos2SigmaM*cos2SigmaM)- - B/6*cos2SigmaM*(-3+4*sinSigma*sinSigma)*(-3+4*cos2SigmaM*cos2SigmaM))); - sigmaP = sigma; - sigma = s / (b*A) + deltaSigma; - } - - var tmp = sinU1*sinSigma - cosU1*cosSigma*cosAlpha1; - var lat2 = Math.atan2(sinU1*cosSigma + cosU1*sinSigma*cosAlpha1, - (1-f)*Math.sqrt(sinAlpha*sinAlpha + tmp*tmp)); - var lambda = Math.atan2(sinSigma*sinAlpha1, cosU1*cosSigma - sinU1*sinSigma*cosAlpha1); - var C = f/16*cosSqAlpha*(4+f*(4-3*cosSqAlpha)); - var L = lambda - (1-C) * f * sinAlpha * - (sigma + C*sinSigma*(cos2SigmaM+C*cosSigma*(-1+2*cos2SigmaM*cos2SigmaM))); - - var revAz = Math.atan2(sinAlpha, -tmp); // final bearing - - return new OpenLayers.LonLat(lon1+u.deg(L), u.deg(lat2)); -}; - -/** - * Function: getParameters - * Parse the parameters from a URL or from the current page itself into a - * JavaScript Object. Note that parameter values with commas are separated - * out into an Array. - * - * Parameters: - * url - {String} Optional url used to extract the query string. - * If url is null or is not supplied, query string is taken - * from the page location. - * options - {Object} Additional options. Optional. - * - * Valid options: - * splitArgs - {Boolean} Split comma delimited params into arrays? Default is - * true. - * - * Returns: - * {Object} An object of key/value pairs from the query string. - */ -OpenLayers.Util.getParameters = function(url, options) { - options = options || {}; - // if no url specified, take it from the location bar - url = (url === null || url === undefined) ? window.location.href : url; - - //parse out parameters portion of url string - var paramsString = ""; - if (OpenLayers.String.contains(url, '?')) { - var start = url.indexOf('?') + 1; - var end = OpenLayers.String.contains(url, "#") ? - url.indexOf('#') : url.length; - paramsString = url.substring(start, end); - } - - var parameters = {}; - var pairs = paramsString.split(/[&;]/); - for(var i=0, len=pairs.length; i<len; ++i) { - var keyValue = pairs[i].split('='); - if (keyValue[0]) { - - var key = keyValue[0]; - try { - key = decodeURIComponent(key); - } catch (err) { - key = unescape(key); - } - - // being liberal by replacing "+" with " " - var value = (keyValue[1] || '').replace(/\+/g, " "); - - try { - value = decodeURIComponent(value); - } catch (err) { - value = unescape(value); - } - - // follow OGC convention of comma delimited values - if (options.splitArgs !== false) { - value = value.split(","); - } - - //if there's only one value, do not return as array - if (value.length == 1) { - value = value[0]; - } - - parameters[key] = value; - } - } - return parameters; -}; - -/** - * Property: lastSeqID - * {Integer} The ever-incrementing count variable. - * Used for generating unique ids. - */ -OpenLayers.Util.lastSeqID = 0; - -/** - * Function: createUniqueID - * Create a unique identifier for this session. Each time this function - * is called, a counter is incremented. The return will be the optional - * prefix (defaults to "id_") appended with the counter value. - * - * Parameters: - * prefix - {String} Optional string to prefix unique id. Default is "id_". - * Note that dots (".") in the prefix will be replaced with underscore ("_"). - * - * Returns: - * {String} A unique id string, built on the passed in prefix. - */ -OpenLayers.Util.createUniqueID = function(prefix) { - if (prefix == null) { - prefix = "id_"; - } else { - prefix = prefix.replace(OpenLayers.Util.dotless, "_"); - } - OpenLayers.Util.lastSeqID += 1; - return prefix + OpenLayers.Util.lastSeqID; -}; - -/** - * Constant: INCHES_PER_UNIT - * {Object} Constant inches per unit -- borrowed from MapServer mapscale.c - * derivation of nautical miles from http://en.wikipedia.org/wiki/Nautical_mile - * Includes the full set of units supported by CS-MAP (http://trac.osgeo.org/csmap/) - * and PROJ.4 (http://trac.osgeo.org/proj/) - * The hardcoded table is maintain in a CS-MAP source code module named CSdataU.c - * The hardcoded table of PROJ.4 units are in pj_units.c. - */ -OpenLayers.INCHES_PER_UNIT = { - 'inches': 1.0, - 'ft': 12.0, - 'mi': 63360.0, - 'm': 39.37, - 'km': 39370, - 'dd': 4374754, - 'yd': 36 -}; -OpenLayers.INCHES_PER_UNIT["in"]= OpenLayers.INCHES_PER_UNIT.inches; -OpenLayers.INCHES_PER_UNIT["degrees"] = OpenLayers.INCHES_PER_UNIT.dd; -OpenLayers.INCHES_PER_UNIT["nmi"] = 1852 * OpenLayers.INCHES_PER_UNIT.m; - -// Units from CS-Map -OpenLayers.METERS_PER_INCH = 0.02540005080010160020; -OpenLayers.Util.extend(OpenLayers.INCHES_PER_UNIT, { - "Inch": OpenLayers.INCHES_PER_UNIT.inches, - "Meter": 1.0 / OpenLayers.METERS_PER_INCH, //EPSG:9001 - "Foot": 0.30480060960121920243 / OpenLayers.METERS_PER_INCH, //EPSG:9003 - "IFoot": 0.30480000000000000000 / OpenLayers.METERS_PER_INCH, //EPSG:9002 - "ClarkeFoot": 0.3047972651151 / OpenLayers.METERS_PER_INCH, //EPSG:9005 - "SearsFoot": 0.30479947153867624624 / OpenLayers.METERS_PER_INCH, //EPSG:9041 - "GoldCoastFoot": 0.30479971018150881758 / OpenLayers.METERS_PER_INCH, //EPSG:9094 - "IInch": 0.02540000000000000000 / OpenLayers.METERS_PER_INCH, - "MicroInch": 0.00002540000000000000 / OpenLayers.METERS_PER_INCH, - "Mil": 0.00000002540000000000 / OpenLayers.METERS_PER_INCH, - "Centimeter": 0.01000000000000000000 / OpenLayers.METERS_PER_INCH, - "Kilometer": 1000.00000000000000000000 / OpenLayers.METERS_PER_INCH, //EPSG:9036 - "Yard": 0.91440182880365760731 / OpenLayers.METERS_PER_INCH, - "SearsYard": 0.914398414616029 / OpenLayers.METERS_PER_INCH, //EPSG:9040 - "IndianYard": 0.91439853074444079983 / OpenLayers.METERS_PER_INCH, //EPSG:9084 - "IndianYd37": 0.91439523 / OpenLayers.METERS_PER_INCH, //EPSG:9085 - "IndianYd62": 0.9143988 / OpenLayers.METERS_PER_INCH, //EPSG:9086 - "IndianYd75": 0.9143985 / OpenLayers.METERS_PER_INCH, //EPSG:9087 - "IndianFoot": 0.30479951 / OpenLayers.METERS_PER_INCH, //EPSG:9080 - "IndianFt37": 0.30479841 / OpenLayers.METERS_PER_INCH, //EPSG:9081 - "IndianFt62": 0.3047996 / OpenLayers.METERS_PER_INCH, //EPSG:9082 - "IndianFt75": 0.3047995 / OpenLayers.METERS_PER_INCH, //EPSG:9083 - "Mile": 1609.34721869443738887477 / OpenLayers.METERS_PER_INCH, - "IYard": 0.91440000000000000000 / OpenLayers.METERS_PER_INCH, //EPSG:9096 - "IMile": 1609.34400000000000000000 / OpenLayers.METERS_PER_INCH, //EPSG:9093 - "NautM": 1852.00000000000000000000 / OpenLayers.METERS_PER_INCH, //EPSG:9030 - "Lat-66": 110943.316488932731 / OpenLayers.METERS_PER_INCH, - "Lat-83": 110946.25736872234125 / OpenLayers.METERS_PER_INCH, - "Decimeter": 0.10000000000000000000 / OpenLayers.METERS_PER_INCH, - "Millimeter": 0.00100000000000000000 / OpenLayers.METERS_PER_INCH, - "Dekameter": 10.00000000000000000000 / OpenLayers.METERS_PER_INCH, - "Decameter": 10.00000000000000000000 / OpenLayers.METERS_PER_INCH, - "Hectometer": 100.00000000000000000000 / OpenLayers.METERS_PER_INCH, - "GermanMeter": 1.0000135965 / OpenLayers.METERS_PER_INCH, //EPSG:9031 - "CaGrid": 0.999738 / OpenLayers.METERS_PER_INCH, - "ClarkeChain": 20.1166194976 / OpenLayers.METERS_PER_INCH, //EPSG:9038 - "GunterChain": 20.11684023368047 / OpenLayers.METERS_PER_INCH, //EPSG:9033 - "BenoitChain": 20.116782494375872 / OpenLayers.METERS_PER_INCH, //EPSG:9062 - "SearsChain": 20.11676512155 / OpenLayers.METERS_PER_INCH, //EPSG:9042 - "ClarkeLink": 0.201166194976 / OpenLayers.METERS_PER_INCH, //EPSG:9039 - "GunterLink": 0.2011684023368047 / OpenLayers.METERS_PER_INCH, //EPSG:9034 - "BenoitLink": 0.20116782494375872 / OpenLayers.METERS_PER_INCH, //EPSG:9063 - "SearsLink": 0.2011676512155 / OpenLayers.METERS_PER_INCH, //EPSG:9043 - "Rod": 5.02921005842012 / OpenLayers.METERS_PER_INCH, - "IntnlChain": 20.1168 / OpenLayers.METERS_PER_INCH, //EPSG:9097 - "IntnlLink": 0.201168 / OpenLayers.METERS_PER_INCH, //EPSG:9098 - "Perch": 5.02921005842012 / OpenLayers.METERS_PER_INCH, - "Pole": 5.02921005842012 / OpenLayers.METERS_PER_INCH, - "Furlong": 201.1684023368046 / OpenLayers.METERS_PER_INCH, - "Rood": 3.778266898 / OpenLayers.METERS_PER_INCH, - "CapeFoot": 0.3047972615 / OpenLayers.METERS_PER_INCH, - "Brealey": 375.00000000000000000000 / OpenLayers.METERS_PER_INCH, - "ModAmFt": 0.304812252984505969011938 / OpenLayers.METERS_PER_INCH, - "Fathom": 1.8288 / OpenLayers.METERS_PER_INCH, - "NautM-UK": 1853.184 / OpenLayers.METERS_PER_INCH, - "50kilometers": 50000.0 / OpenLayers.METERS_PER_INCH, - "150kilometers": 150000.0 / OpenLayers.METERS_PER_INCH -}); - -//unit abbreviations supported by PROJ.4 -OpenLayers.Util.extend(OpenLayers.INCHES_PER_UNIT, { - "mm": OpenLayers.INCHES_PER_UNIT["Meter"] / 1000.0, - "cm": OpenLayers.INCHES_PER_UNIT["Meter"] / 100.0, - "dm": OpenLayers.INCHES_PER_UNIT["Meter"] * 100.0, - "km": OpenLayers.INCHES_PER_UNIT["Meter"] * 1000.0, - "kmi": OpenLayers.INCHES_PER_UNIT["nmi"], //International Nautical Mile - "fath": OpenLayers.INCHES_PER_UNIT["Fathom"], //International Fathom - "ch": OpenLayers.INCHES_PER_UNIT["IntnlChain"], //International Chain - "link": OpenLayers.INCHES_PER_UNIT["IntnlLink"], //International Link - "us-in": OpenLayers.INCHES_PER_UNIT["inches"], //U.S. Surveyor's Inch - "us-ft": OpenLayers.INCHES_PER_UNIT["Foot"], //U.S. Surveyor's Foot - "us-yd": OpenLayers.INCHES_PER_UNIT["Yard"], //U.S. Surveyor's Yard - "us-ch": OpenLayers.INCHES_PER_UNIT["GunterChain"], //U.S. Surveyor's Chain - "us-mi": OpenLayers.INCHES_PER_UNIT["Mile"], //U.S. Surveyor's Statute Mile - "ind-yd": OpenLayers.INCHES_PER_UNIT["IndianYd37"], //Indian Yard - "ind-ft": OpenLayers.INCHES_PER_UNIT["IndianFt37"], //Indian Foot - "ind-ch": 20.11669506 / OpenLayers.METERS_PER_INCH //Indian Chain -}); - -/** - * Constant: DOTS_PER_INCH - * {Integer} 72 (A sensible default) - */ -OpenLayers.DOTS_PER_INCH = 72; - -/** - * Function: normalizeScale - * - * Parameters: - * scale - {float} - * - * Returns: - * {Float} A normalized scale value, in 1 / X format. - * This means that if a value less than one ( already 1/x) is passed - * in, it just returns scale directly. Otherwise, it returns - * 1 / scale - */ -OpenLayers.Util.normalizeScale = function (scale) { - var normScale = (scale > 1.0) ? (1.0 / scale) - : scale; - return normScale; -}; - -/** - * Function: getResolutionFromScale - * - * Parameters: - * scale - {Float} - * units - {String} Index into OpenLayers.INCHES_PER_UNIT hashtable. - * Default is degrees - * - * Returns: - * {Float} The corresponding resolution given passed-in scale and unit - * parameters. If the given scale is falsey, the returned resolution will - * be undefined. - */ -OpenLayers.Util.getResolutionFromScale = function (scale, units) { - var resolution; - if (scale) { - if (units == null) { - units = "degrees"; - } - var normScale = OpenLayers.Util.normalizeScale(scale); - resolution = 1 / (normScale * OpenLayers.INCHES_PER_UNIT[units] - * OpenLayers.DOTS_PER_INCH); - } - return resolution; -}; - -/** - * Function: getScaleFromResolution - * - * Parameters: - * resolution - {Float} - * units - {String} Index into OpenLayers.INCHES_PER_UNIT hashtable. - * Default is degrees - * - * Returns: - * {Float} The corresponding scale given passed-in resolution and unit - * parameters. - */ -OpenLayers.Util.getScaleFromResolution = function (resolution, units) { - - if (units == null) { - units = "degrees"; - } - - var scale = resolution * OpenLayers.INCHES_PER_UNIT[units] * - OpenLayers.DOTS_PER_INCH; - return scale; -}; - -/** - * Function: pagePosition - * Calculates the position of an element on the page (see - * http://code.google.com/p/doctype/wiki/ArticlePageOffset) - * - * OpenLayers.Util.pagePosition is based on Yahoo's getXY method, which is - * Copyright (c) 2006, Yahoo! Inc. - * All rights reserved. - * - * Redistribution and use of this software in source and binary forms, with or - * without modification, are permitted provided that the following conditions - * are met: - * - * * Redistributions of source code must retain the above copyright notice, - * this list of conditions and the following disclaimer. - * - * * Redistributions in binary form must reproduce the above copyright notice, - * this list of conditions and the following disclaimer in the documentation - * and/or other materials provided with the distribution. - * - * * Neither the name of Yahoo! Inc. nor the names of its contributors may be - * used to endorse or promote products derived from this software without - * specific prior written permission of Yahoo! Inc. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" - * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE - * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR - * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF - * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS - * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN - * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) - * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE - * POSSIBILITY OF SUCH DAMAGE. - * - * Parameters: - * forElement - {DOMElement} - * - * Returns: - * {Array} two item array, Left value then Top value. - */ -OpenLayers.Util.pagePosition = function(forElement) { - // NOTE: If element is hidden (display none or disconnected or any the - // ancestors are hidden) we get (0,0) by default but we still do the - // accumulation of scroll position. - - var pos = [0, 0]; - var viewportElement = OpenLayers.Util.getViewportElement(); - if (!forElement || forElement == window || forElement == viewportElement) { - // viewport is always at 0,0 as that defined the coordinate system for - // this function - this avoids special case checks in the code below - return pos; - } - - // Gecko browsers normally use getBoxObjectFor to calculate the position. - // When invoked for an element with an implicit absolute position though it - // can be off by one. Therefore the recursive implementation is used in - // those (relatively rare) cases. - var BUGGY_GECKO_BOX_OBJECT = - OpenLayers.IS_GECKO && document.getBoxObjectFor && - OpenLayers.Element.getStyle(forElement, 'position') == 'absolute' && - (forElement.style.top == '' || forElement.style.left == ''); - - var parent = null; - var box; - - if (forElement.getBoundingClientRect) { // IE - box = forElement.getBoundingClientRect(); - var scrollTop = window.pageYOffset || viewportElement.scrollTop; - var scrollLeft = window.pageXOffset || viewportElement.scrollLeft; - - pos[0] = box.left + scrollLeft; - pos[1] = box.top + scrollTop; - - } else if (document.getBoxObjectFor && !BUGGY_GECKO_BOX_OBJECT) { // gecko - // Gecko ignores the scroll values for ancestors, up to 1.9. See: - // https://bugzilla.mozilla.org/show_bug.cgi?id=328881 and - // https://bugzilla.mozilla.org/show_bug.cgi?id=330619 - - box = document.getBoxObjectFor(forElement); - var vpBox = document.getBoxObjectFor(viewportElement); - pos[0] = box.screenX - vpBox.screenX; - pos[1] = box.screenY - vpBox.screenY; - - } else { // safari/opera - pos[0] = forElement.offsetLeft; - pos[1] = forElement.offsetTop; - parent = forElement.offsetParent; - if (parent != forElement) { - while (parent) { - pos[0] += parent.offsetLeft; - pos[1] += parent.offsetTop; - parent = parent.offsetParent; - } - } - - var browser = OpenLayers.BROWSER_NAME; - - // opera & (safari absolute) incorrectly account for body offsetTop - if (browser == "opera" || (browser == "safari" && - OpenLayers.Element.getStyle(forElement, 'position') == 'absolute')) { - pos[1] -= document.body.offsetTop; - } - - // accumulate the scroll positions for everything but the body element - parent = forElement.offsetParent; - while (parent && parent != document.body) { - pos[0] -= parent.scrollLeft; - // see https://bugs.opera.com/show_bug.cgi?id=249965 - if (browser != "opera" || parent.tagName != 'TR') { - pos[1] -= parent.scrollTop; - } - parent = parent.offsetParent; - } - } - - return pos; -}; - -/** - * Function: getViewportElement - * Returns die viewport element of the document. The viewport element is - * usually document.documentElement, except in IE,where it is either - * document.body or document.documentElement, depending on the document's - * compatibility mode (see - * http://code.google.com/p/doctype/wiki/ArticleClientViewportElement) - * - * Returns: - * {DOMElement} - */ -OpenLayers.Util.getViewportElement = function() { - var viewportElement = arguments.callee.viewportElement; - if (viewportElement == undefined) { - viewportElement = (OpenLayers.BROWSER_NAME == "msie" && - document.compatMode != 'CSS1Compat') ? document.body : - document.documentElement; - arguments.callee.viewportElement = viewportElement; - } - return viewportElement; -}; - -/** - * Function: isEquivalentUrl - * Test two URLs for equivalence. - * - * Setting 'ignoreCase' allows for case-independent comparison. - * - * Comparison is based on: - * - Protocol - * - Host (evaluated without the port) - * - Port (set 'ignorePort80' to ignore "80" values) - * - Hash ( set 'ignoreHash' to disable) - * - Pathname (for relative <-> absolute comparison) - * - Arguments (so they can be out of order) - * - * Parameters: - * url1 - {String} - * url2 - {String} - * options - {Object} Allows for customization of comparison: - * 'ignoreCase' - Default is True - * 'ignorePort80' - Default is True - * 'ignoreHash' - Default is True - * - * Returns: - * {Boolean} Whether or not the two URLs are equivalent - */ -OpenLayers.Util.isEquivalentUrl = function(url1, url2, options) { - options = options || {}; - - OpenLayers.Util.applyDefaults(options, { - ignoreCase: true, - ignorePort80: true, - ignoreHash: true, - splitArgs: false - }); - - var urlObj1 = OpenLayers.Util.createUrlObject(url1, options); - var urlObj2 = OpenLayers.Util.createUrlObject(url2, options); - - //compare all keys except for "args" (treated below) - for(var key in urlObj1) { - if(key !== "args") { - if(urlObj1[key] != urlObj2[key]) { - return false; - } - } - } - - // compare search args - irrespective of order - for(var key in urlObj1.args) { - if(urlObj1.args[key] != urlObj2.args[key]) { - return false; - } - delete urlObj2.args[key]; - } - // urlObj2 shouldn't have any args left - for(var key in urlObj2.args) { - return false; - } - - return true; -}; - -/** - * Function: createUrlObject - * - * Parameters: - * url - {String} - * options - {Object} A hash of options. - * - * Valid options: - * ignoreCase - {Boolean} lowercase url, - * ignorePort80 - {Boolean} don't include explicit port if port is 80, - * ignoreHash - {Boolean} Don't include part of url after the hash (#). - * splitArgs - {Boolean} Split comma delimited params into arrays? Default is - * true. - * - * Returns: - * {Object} An object with separate url, a, port, host, and args parsed out - * and ready for comparison - */ -OpenLayers.Util.createUrlObject = function(url, options) { - options = options || {}; - - // deal with relative urls first - if(!(/^\w+:\/\//).test(url)) { - var loc = window.location; - var port = loc.port ? ":" + loc.port : ""; - var fullUrl = loc.protocol + "//" + loc.host.split(":").shift() + port; - if(url.indexOf("/") === 0) { - // full pathname - url = fullUrl + url; - } else { - // relative to current path - var parts = loc.pathname.split("/"); - parts.pop(); - url = fullUrl + parts.join("/") + "/" + url; - } - } - - if (options.ignoreCase) { - url = url.toLowerCase(); - } - - var a = document.createElement('a'); - a.href = url; - - var urlObject = {}; - - //host (without port) - urlObject.host = a.host.split(":").shift(); - - //protocol - urlObject.protocol = a.protocol; - - //port (get uniform browser behavior with port 80 here) - if(options.ignorePort80) { - urlObject.port = (a.port == "80" || a.port == "0") ? "" : a.port; - } else { - urlObject.port = (a.port == "" || a.port == "0") ? "80" : a.port; - } - - //hash - urlObject.hash = (options.ignoreHash || a.hash === "#") ? "" : a.hash; - - //args - var queryString = a.search; - if (!queryString) { - var qMark = url.indexOf("?"); - queryString = (qMark != -1) ? url.substr(qMark) : ""; - } - urlObject.args = OpenLayers.Util.getParameters(queryString, - {splitArgs: options.splitArgs}); - - // pathname - // - // This is a workaround for Internet Explorer where - // window.location.pathname has a leading "/", but - // a.pathname has no leading "/". - urlObject.pathname = (a.pathname.charAt(0) == "/") ? a.pathname : "/" + a.pathname; - - return urlObject; -}; - -/** - * Function: removeTail - * Takes a url and removes everything after the ? and # - * - * Parameters: - * url - {String} The url to process - * - * Returns: - * {String} The string with all queryString and Hash removed - */ -OpenLayers.Util.removeTail = function(url) { - var head = null; - - var qMark = url.indexOf("?"); - var hashMark = url.indexOf("#"); - - if (qMark == -1) { - head = (hashMark != -1) ? url.substr(0,hashMark) : url; - } else { - head = (hashMark != -1) ? url.substr(0,Math.min(qMark, hashMark)) - : url.substr(0, qMark); - } - return head; -}; - -/** - * Constant: IS_GECKO - * {Boolean} True if the userAgent reports the browser to use the Gecko engine - */ -OpenLayers.IS_GECKO = (function() { - var ua = navigator.userAgent.toLowerCase(); - return ua.indexOf("webkit") == -1 && ua.indexOf("gecko") != -1; -})(); - -/** - * Constant: CANVAS_SUPPORTED - * {Boolean} True if canvas 2d is supported. - */ -OpenLayers.CANVAS_SUPPORTED = (function() { - var elem = document.createElement('canvas'); - return !!(elem.getContext && elem.getContext('2d')); -})(); - -/** - * Constant: BROWSER_NAME - * {String} - * A substring of the navigator.userAgent property. Depending on the userAgent - * property, this will be the empty string or one of the following: - * * "opera" -- Opera - * * "msie" -- Internet Explorer - * * "safari" -- Safari - * * "firefox" -- Firefox - * * "mozilla" -- Mozilla - */ -OpenLayers.BROWSER_NAME = (function() { - var name = ""; - var ua = navigator.userAgent.toLowerCase(); - if (ua.indexOf("opera") != -1) { - name = "opera"; - } else if (ua.indexOf("msie") != -1) { - name = "msie"; - } else if (ua.indexOf("safari") != -1) { - name = "safari"; - } else if (ua.indexOf("mozilla") != -1) { - if (ua.indexOf("firefox") != -1) { - name = "firefox"; - } else { - name = "mozilla"; - } - } - return name; -})(); - -/** - * Function: getBrowserName - * - * Returns: - * {String} A string which specifies which is the current - * browser in which we are running. - * - * Currently-supported browser detection and codes: - * * 'opera' -- Opera - * * 'msie' -- Internet Explorer - * * 'safari' -- Safari - * * 'firefox' -- Firefox - * * 'mozilla' -- Mozilla - * - * If we are unable to property identify the browser, we - * return an empty string. - */ -OpenLayers.Util.getBrowserName = function() { - return OpenLayers.BROWSER_NAME; -}; - -/** - * Method: getRenderedDimensions - * Renders the contentHTML offscreen to determine actual dimensions for - * popup sizing. As we need layout to determine dimensions the content - * is rendered -9999px to the left and absolute to ensure the - * scrollbars do not flicker - * - * Parameters: - * contentHTML - * size - {<OpenLayers.Size>} If either the 'w' or 'h' properties is - * specified, we fix that dimension of the div to be measured. This is - * useful in the case where we have a limit in one dimension and must - * therefore meaure the flow in the other dimension. - * options - {Object} - * - * Allowed Options: - * displayClass - {String} Optional parameter. A CSS class name(s) string - * to provide the CSS context of the rendered content. - * containerElement - {DOMElement} Optional parameter. Insert the HTML to - * this node instead of the body root when calculating dimensions. - * - * Returns: - * {<OpenLayers.Size>} - */ -OpenLayers.Util.getRenderedDimensions = function(contentHTML, size, options) { - - var w, h; - - // create temp container div with restricted size - var container = document.createElement("div"); - container.style.visibility = "hidden"; - - var containerElement = (options && options.containerElement) - ? options.containerElement : document.body; - - // Opera and IE7 can't handle a node with position:aboslute if it inherits - // position:absolute from a parent. - var parentHasPositionAbsolute = false; - var superContainer = null; - var parent = containerElement; - while (parent && parent.tagName.toLowerCase()!="body") { - var parentPosition = OpenLayers.Element.getStyle(parent, "position"); - if(parentPosition == "absolute") { - parentHasPositionAbsolute = true; - break; - } else if (parentPosition && parentPosition != "static") { - break; - } - parent = parent.parentNode; - } - if(parentHasPositionAbsolute && (containerElement.clientHeight === 0 || - containerElement.clientWidth === 0) ){ - superContainer = document.createElement("div"); - superContainer.style.visibility = "hidden"; - superContainer.style.position = "absolute"; - superContainer.style.overflow = "visible"; - superContainer.style.width = document.body.clientWidth + "px"; - superContainer.style.height = document.body.clientHeight + "px"; - superContainer.appendChild(container); - } - container.style.position = "absolute"; - - //fix a dimension, if specified. - if (size) { - if (size.w) { - w = size.w; - container.style.width = w + "px"; - } else if (size.h) { - h = size.h; - container.style.height = h + "px"; - } - } - - //add css classes, if specified - if (options && options.displayClass) { - container.className = options.displayClass; - } - - // create temp content div and assign content - var content = document.createElement("div"); - content.innerHTML = contentHTML; - - // we need overflow visible when calculating the size - content.style.overflow = "visible"; - if (content.childNodes) { - for (var i=0, l=content.childNodes.length; i<l; i++) { - if (!content.childNodes[i].style) continue; - content.childNodes[i].style.overflow = "visible"; - } - } - - // add content to restricted container - container.appendChild(content); - - // append container to body for rendering - if (superContainer) { - containerElement.appendChild(superContainer); - } else { - containerElement.appendChild(container); - } - - // calculate scroll width of content and add corners and shadow width - if (!w) { - w = parseInt(content.scrollWidth); - - // update container width to allow height to adjust - container.style.width = w + "px"; - } - // capture height and add shadow and corner image widths - if (!h) { - h = parseInt(content.scrollHeight); - } - - // remove elements - container.removeChild(content); - if (superContainer) { - superContainer.removeChild(container); - containerElement.removeChild(superContainer); - } else { - containerElement.removeChild(container); - } - - return new OpenLayers.Size(w, h); -}; - -/** - * APIFunction: getScrollbarWidth - * This function has been modified by the OpenLayers from the original version, - * written by Matthew Eernisse and released under the Apache 2 - * license here: - * - * http://www.fleegix.org/articles/2006/05/30/getting-the-scrollbar-width-in-pixels - * - * It has been modified simply to cache its value, since it is physically - * impossible that this code could ever run in more than one browser at - * once. - * - * Returns: - * {Integer} - */ -OpenLayers.Util.getScrollbarWidth = function() { - - var scrollbarWidth = OpenLayers.Util._scrollbarWidth; - - if (scrollbarWidth == null) { - var scr = null; - var inn = null; - var wNoScroll = 0; - var wScroll = 0; - - // Outer scrolling div - scr = document.createElement('div'); - scr.style.position = 'absolute'; - scr.style.top = '-1000px'; - scr.style.left = '-1000px'; - scr.style.width = '100px'; - scr.style.height = '50px'; - // Start with no scrollbar - scr.style.overflow = 'hidden'; - - // Inner content div - inn = document.createElement('div'); - inn.style.width = '100%'; - inn.style.height = '200px'; - - // Put the inner div in the scrolling div - scr.appendChild(inn); - // Append the scrolling div to the doc - document.body.appendChild(scr); - - // Width of the inner div sans scrollbar - wNoScroll = inn.offsetWidth; - - // Add the scrollbar - scr.style.overflow = 'scroll'; - // Width of the inner div width scrollbar - wScroll = inn.offsetWidth; - - // Remove the scrolling div from the doc - document.body.removeChild(document.body.lastChild); - - // Pixel width of the scroller - OpenLayers.Util._scrollbarWidth = (wNoScroll - wScroll); - scrollbarWidth = OpenLayers.Util._scrollbarWidth; - } - - return scrollbarWidth; -}; - -/** - * APIFunction: getFormattedLonLat - * This function will return latitude or longitude value formatted as - * - * Parameters: - * coordinate - {Float} the coordinate value to be formatted - * axis - {String} value of either 'lat' or 'lon' to indicate which axis is to - * to be formatted (default = lat) - * dmsOption - {String} specify the precision of the output can be one of: - * 'dms' show degrees minutes and seconds - * 'dm' show only degrees and minutes - * 'd' show only degrees - * - * Returns: - * {String} the coordinate value formatted as a string - */ -OpenLayers.Util.getFormattedLonLat = function(coordinate, axis, dmsOption) { - if (!dmsOption) { - dmsOption = 'dms'; //default to show degree, minutes, seconds - } - - coordinate = (coordinate+540)%360 - 180; // normalize for sphere being round - - var abscoordinate = Math.abs(coordinate); - var coordinatedegrees = Math.floor(abscoordinate); - - var coordinateminutes = (abscoordinate - coordinatedegrees)/(1/60); - var tempcoordinateminutes = coordinateminutes; - coordinateminutes = Math.floor(coordinateminutes); - var coordinateseconds = (tempcoordinateminutes - coordinateminutes)/(1/60); - coordinateseconds = Math.round(coordinateseconds*10); - coordinateseconds /= 10; - - if( coordinateseconds >= 60) { - coordinateseconds -= 60; - coordinateminutes += 1; - if( coordinateminutes >= 60) { - coordinateminutes -= 60; - coordinatedegrees += 1; - } - } - - if( coordinatedegrees < 10 ) { - coordinatedegrees = "0" + coordinatedegrees; - } - var str = coordinatedegrees + "\u00B0"; - - if (dmsOption.indexOf('dm') >= 0) { - if( coordinateminutes < 10 ) { - coordinateminutes = "0" + coordinateminutes; - } - str += coordinateminutes + "'"; - - if (dmsOption.indexOf('dms') >= 0) { - if( coordinateseconds < 10 ) { - coordinateseconds = "0" + coordinateseconds; - } - str += coordinateseconds + '"'; - } - } - - if (axis == "lon") { - str += coordinate < 0 ? OpenLayers.i18n("W") : OpenLayers.i18n("E"); - } else { - str += coordinate < 0 ? OpenLayers.i18n("S") : OpenLayers.i18n("N"); - } - return str; -}; - |