forked from cutting-room-floor/wax
/
wax.ol.js
1187 lines (1073 loc) · 43 KB
/
wax.ol.js
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/* wax - 3.0.3 - 1.0.4-328-g04364b9 */
/*!
* Reqwest! A x-browser general purpose XHR connection manager
* copyright Dustin Diaz 2011
* https://github.com/ded/reqwest
* license MIT
*/
!function(window){function serial(a){var b=a.name;if(a.disabled||!b)return"";b=enc(b);switch(a.tagName.toLowerCase()){case"input":switch(a.type){case"reset":case"button":case"image":case"file":return"";case"checkbox":case"radio":return a.checked?b+"="+(a.value?enc(a.value):!0)+"&":"";default:return b+"="+(a.value?enc(a.value):"")+"&"}break;case"textarea":return b+"="+enc(a.value)+"&";case"select":return b+"="+enc(a.options[a.selectedIndex].value)+"&"}return""}function enc(a){return encodeURIComponent(a)}function reqwest(a,b){return new Reqwest(a,b)}function init(o,fn){function error(a){o.error&&o.error(a),complete(a)}function success(resp){o.timeout&&clearTimeout(self.timeout)&&(self.timeout=null);var r=resp.responseText,JSON;switch(type){case"json":resp=JSON?JSON.parse(r):eval("("+r+")");break;case"js":resp=eval(r);break;case"html":resp=r}fn(resp),o.success&&o.success(resp),complete(resp)}function complete(a){o.complete&&o.complete(a)}this.url=typeof o=="string"?o:o.url,this.timeout=null;var type=o.type||setType(this.url),self=this;fn=fn||function(){},o.timeout&&(this.timeout=setTimeout(function(){self.abort(),error()},o.timeout)),this.request=getRequest(o,success,error)}function setType(a){if(/\.json$/.test(a))return"json";if(/\.jsonp$/.test(a))return"jsonp";if(/\.js$/.test(a))return"js";if(/\.html?$/.test(a))return"html";if(/\.xml$/.test(a))return"xml";return"js"}function Reqwest(a,b){this.o=a,this.fn=b,init.apply(this,arguments)}function getRequest(a,b,c){if(a.type!="jsonp"){var f=xhr();f.open(a.method||"GET",typeof a=="string"?a:a.url,!0),setHeaders(f,a),f.onreadystatechange=readyState(f,b,c),a.before&&a.before(f),f.send(a.data||null);return f}var d=doc.createElement("script");window[getCallbackName(a)]=generalCallback,d.type="text/javascript",d.src=a.url,d.async=!0;var e=function(){a.success&&a.success(lastValue),lastValue=undefined,head.removeChild(d)};d.onload=e,d.onreadystatechange=function(){/^loaded|complete$/.test(d.readyState)&&e()},head.appendChild(d)}function generalCallback(a){lastValue=a}function getCallbackName(a){var b=a.jsonpCallback||"callback";if(a.url.slice(-(b.length+2))==b+"=?"){var c="reqwest_"+uniqid++;a.url=a.url.substr(0,a.url.length-1)+c;return c}var d=new RegExp(b+"=([\\w]+)");return a.url.match(d)[1]}function setHeaders(a,b){var c=b.headers||{};c.Accept=c.Accept||"text/javascript, text/html, application/xml, text/xml, */*",c["X-Requested-With"]=c["X-Requested-With"]||"XMLHttpRequest";if(b.data){c["Content-type"]=c["Content-type"]||"application/x-www-form-urlencoded";for(var d in c)c.hasOwnProperty(d)&&a.setRequestHeader(d,c[d],!1)}}function readyState(a,b,c){return function(){a&&a.readyState==4&&(twoHundo.test(a.status)?b(a):c(a))}}var twoHundo=/^20\d$/,doc=document,byTag="getElementsByTagName",head=doc[byTag]("head")[0],xhr="XMLHttpRequest"in window?function(){return new XMLHttpRequest}:function(){return new ActiveXObject("Microsoft.XMLHTTP")},uniqid=0,lastValue;Reqwest.prototype={abort:function(){this.request.abort()},retry:function(){init.call(this,this.o,this.fn)}},reqwest.serialize=function(a){var b=a[byTag]("input"),c=a[byTag]("select"),d=a[byTag]("textarea");return(v(b).chain().toArray().map(serial).value().join("")+v(c).chain().toArray().map(serial).value().join("")+v(d).chain().toArray().map(serial).value().join("")).replace(/&$/,"")},reqwest.serializeArray=function(a){for(var b=this.serialize(a).split("&"),c=0,d=b.length,e=[],f;c<d;c++)b[c]&&(f=b[c].split("="))&&e.push({name:f[0],value:f[1]});return e};var old=window.reqwest;reqwest.noConflict=function(){window.reqwest=old;return this},window.reqwest=reqwest}(this)// Instantiate objects based on a JSON "record". The record must be a statement
// array in the following form:
//
// [ "{verb} {subject}", arg0, arg1, arg2, ... argn ]
//
// Each record is processed from a passed `context` which starts from the
// global (ie. `window`) context if unspecified.
//
// - `@literal` Evaluate `subject` and return its value as a scalar. Useful for
// referencing API constants, object properties or other values.
// - `@new` Call `subject` as a constructor with args `arg0 - argn`. The
// newly created object will be the new context.
// - `@call` Call `subject` as a function with args `arg0 - argn` in the
// global namespace. The return value will be the new context.
// - `@chain` Call `subject` as a method of the current context with args `arg0
// - argn`. The return value will be the new context.
// - `@inject` Call `subject` as a method of the current context with args
// `arg0 - argn`. The return value will *not* affect the context.
// - `@group` Treat `arg0 - argn` as a series of statement arrays that share a
// context. Each statement will be called in serial and affect the context
// for the next statement.
//
// Usage:
//
// var gmap = ['@new google.maps.Map',
// ['@call document.getElementById', 'gmap'],
// {
// center: [ '@new google.maps.LatLng', 0, 0 ],
// zoom: 2,
// mapTypeId: [ '@literal google.maps.MapTypeId.ROADMAP' ]
// }
// ];
// wax.Record(gmap);
var wax = wax || {};
// TODO: replace with non-global-modifier
// https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Array/Reduce
if (!Array.prototype.reduce) {
Array.prototype.reduce = function(fun /*, initialValue */) {
"use strict";
if (this === void 0 || this === null)
throw new TypeError();
var t = Object(this);
var len = t.length >>> 0;
if (typeof fun !== "function")
throw new TypeError();
// no value to return if no initial value and an empty array
if (len == 0 && arguments.length == 1)
throw new TypeError();
var k = 0;
var accumulator;
if (arguments.length >= 2) {
accumulator = arguments[1];
} else {
do {
if (k in t) {
accumulator = t[k++];
break;
}
// if array contains no values, no initial value to return
if (++k >= len)
throw new TypeError();
}
while (true);
}
while (k < len) {
if (k in t)
accumulator = fun.call(undefined, accumulator, t[k], k, t);
k++;
}
return accumulator;
};
}
wax.Record = function(obj, context) {
var getFunction = function(head, cur) {
// TODO: strip out reduce
var ret = head.split('.').reduce(function(part, segment) {
return [part[1] || part[0], part[1] ? part[1][segment] : part[0][segment]];
}, [cur || window, null]);
if (ret[0] && ret[1]) {
return ret;
} else {
throw head + ' not found.';
}
};
var makeObject = function(fn_name, args) {
var fn_obj = getFunction(fn_name),
obj;
args = args.length ? wax.Record(args) : [];
// real browsers
if (Object.create) {
obj = Object.create(fn_obj[1].prototype);
fn_obj[1].apply(obj, args);
// lord have mercy on your soul.
} else {
switch (args.length) {
case 0: obj = new fn_obj[1](); break;
case 1: obj = new fn_obj[1](args[0]); break;
case 2: obj = new fn_obj[1](args[0], args[1]); break;
case 3: obj = new fn_obj[1](args[0], args[1], args[2]); break;
case 4: obj = new fn_obj[1](args[0], args[1], args[2], args[3]); break;
case 5: obj = new fn_obj[1](args[0], args[1], args[2], args[3], args[4]); break;
default: break;
}
}
return obj;
};
var runFunction = function(fn_name, args, cur) {
var fn_obj = getFunction(fn_name, cur);
var fn_args = args.length ? wax.Record(args) : [];
// @TODO: This is currently a stopgap measure that calls methods like
// `foo.bar()` in the context of `foo`. It will probably be necessary
// in the future to be able to call `foo.bar()` from other contexts.
if (cur && fn_name.indexOf('.') === -1) {
return fn_obj[1].apply(cur, fn_args);
} else {
return fn_obj[1].apply(fn_obj[0], fn_args);
}
};
var isKeyword = function(string) {
return wax.util.isString(string) && (wax.util.indexOf([
'@new',
'@call',
'@literal',
'@chain',
'@inject',
'@group'
], string.split(' ')[0]) !== -1);
};
var altersContext = function(string) {
return wax.util.isString(string) && (wax.util.indexOf([
'@new',
'@call',
'@chain'
], string.split(' ')[0]) !== -1);
};
var getStatement = function(obj) {
if (wax.util.isArray(obj) && obj[0] && isKeyword(obj[0])) {
return {
verb: obj[0].split(' ')[0],
subject: obj[0].split(' ')[1],
object: obj.slice(1)
};
}
return false;
};
var i,
fn = false,
ret = null,
child = null,
statement = getStatement(obj);
if (statement) {
switch (statement.verb) {
case '@group':
for (i = 0; i < statement.object.length; i++) {
ret = wax.Record(statement.object[i], context);
child = getStatement(statement.object[i]);
if (child && altersContext(child.verb)) {
context = ret;
}
}
return context;
case '@new':
return makeObject(statement.subject, statement.object);
case '@literal':
fn = getFunction(statement.subject);
return fn ? fn[1] : null;
case '@inject':
return runFunction(statement.subject, statement.object, context);
case '@chain':
return runFunction(statement.subject, statement.object, context);
case '@call':
return runFunction(statement.subject, statement.object, null);
}
} else if (obj !== null && typeof obj === 'object') {
var keys = wax.util.keys(obj);
for (i = 0; i < keys.length; i++) {
var key = keys[i];
obj[key] = wax.Record(obj[key], context);
}
return obj;
} else {
return obj;
}
};
wax = wax || {};
// Attribution
// -----------
wax.attribution = function() {
var container,
a = {};
a.set = function(content) {
if (typeof content === 'undefined') return;
container.innerHTML = content;
return this;
};
a.element = function() {
return container;
};
a.init = function() {
container = document.createElement('div');
container.className = 'wax-attribution';
return this;
};
return a.init();
};
// Formatter
// ---------
wax.formatter = function(x) {
var formatter = {},
f;
// Prevent against just any input being used.
if (x && typeof x === 'string') {
try {
// Ugly, dangerous use of eval.
eval('f = ' + x);
} catch (e) {
if (console) console.log(e);
}
} else if (x && typeof x === 'function') {
f = x;
} else {
f = function() {};
}
// Wrap the given formatter function in order to
// catch exceptions that it may throw.
formatter.format = function(options, data) {
try {
return f(options, data);
} catch (e) {
if (console) console.log(e);
}
};
return formatter;
};
// GridInstance
// ------------
// GridInstances are queryable, fully-formed
// objects for acquiring features from events.
wax.GridInstance = function(grid_tile, formatter, options) {
options = options || {};
// resolution is the grid-elements-per-pixel ratio of gridded data.
// The size of a tile element. For now we expect tiles to be squares.
var instance = {},
resolution = options.resolution || 4;
tileSize = options.tileSize || 256;
// Resolve the UTF-8 encoding stored in grids to simple
// number values.
// See the [utfgrid section of the mbtiles spec](https://github.com/mapbox/mbtiles-spec/blob/master/1.1/utfgrid.md)
// for details.
function resolveCode(key) {
if (key >= 93) key--;
if (key >= 35) key--;
key -= 32;
return key;
}
// Get a feature:
//
// * `x` and `y`: the screen coordinates of an event
// * `tile_element`: a DOM element of a tile, from which we can get an offset.
// * `options` options to give to the formatter: minimally having a `format`
// member, being `full`, `teaser`, or something else.
instance.getFeature = function(x, y, tile_element, options) {
if (!(grid_tile && grid_tile.grid)) return;
// IE problem here - though recoverable, for whatever reason
var offset = wax.util.offset(tile_element),
tileX = offset.left,
tileY = offset.top,
res = (offset.width / tileSize) * resolution;
// This tile's resolution. larger tiles will have lower, aka coarser, resolutions
if ((y - tileY < 0) || (x - tileX < 0)) return;
if ((Math.floor(y - tileY) > tileSize) ||
(Math.floor(x - tileX) > tileSize)) return;
// Find the key in the grid. The above calls should ensure that
// the grid's array is large enough to make this work.
var key = grid_tile.grid[
Math.floor((y - tileY) / res)
].charCodeAt(
Math.floor((x - tileX) / res)
);
key = resolveCode(key);
// If this layers formatter hasn't been loaded yet,
// download and load it now.
if (grid_tile.keys[key] && grid_tile.data[grid_tile.keys[key]]) {
return formatter.format(options, grid_tile.data[grid_tile.keys[key]]);
}
};
return instance;
};
// GridManager
// -----------
// Generally one GridManager will be used per map.
//
// It takes one options object, which current accepts a single option:
// `resolution` determines the number of pixels per grid element in the grid.
// The default is 4.
wax.GridManager = function(options) {
options = options || {};
var resolution = options.resolution || 4,
grid_tiles = {},
manager = {},
xyzFinder = new RegExp(/(\d+)\/(\d+)\/(\d+)\.[\w\._]+/g),
formatter;
var formatterUrl = function(url) {
return url.replace(/\d+\/\d+\/\d+\.\w+/, 'layer.json');
};
var gridUrl = function(url) {
return url.replace(/(\.png|\.jpg|\.jpeg)(\d*)/, '.grid.json');
};
function getFormatter(url, callback) {
if (typeof formatter !== 'undefined') {
return callback(null, formatter);
} else {
wax.request.get(formatterUrl(url), function(err, data) {
if (data && data.formatter) {
formatter = wax.formatter(data.formatter);
} else {
formatter = false;
}
return callback(err, formatter);
});
}
}
function templatedGridUrl(template) {
if (typeof template === 'string') template = [template];
return function templatedGridFinder(url) {
if (!url) return;
var xyz = xyzFinder.exec(url);
if (!xyz) return;
return template[parseInt(xyz[2], 10) % template.length]
.replace('{z}', xyz[1])
.replace('{x}', xyz[2])
.replace('{y}', xyz[3]);
};
}
manager.formatter = function(x) {
if (!arguments.length) return formatter;
formatter = wax.formatter(x);
return manager;
};
manager.formatterUrl = function(x) {
if (!arguments.length) return formatterUrl;
formatterUrl = typeof x === 'string' ?
function() { return x; } : x;
return manager;
};
manager.gridUrl = function(x) {
if (!arguments.length) return gridUrl;
gridUrl = typeof x === 'function' ?
x : templatedGridUrl(x);
return manager;
};
manager.getGrid = function(url, callback) {
getFormatter(url, function(err, f) {
var gurl = gridUrl(url);
if (err || !f || !gurl) return callback(err, null);
wax.request.get(gurl, function(err, t) {
if (err) return callback(err, null);
callback(null, wax.GridInstance(t, f, {
resolution: resolution || 4
}));
});
});
return manager;
};
if (options.formatter) manager.formatter(options.formatter);
if (options.grids) manager.gridUrl(options.grids);
return manager;
};
// Wax Legend
// ----------
// Wax header
var wax = wax || {};
wax.legend = function() {
var element,
legend = {},
container;
legend.element = function() {
return container;
};
legend.content = function(content) {
if (!arguments.length) return element.innerHTML;
if (content) {
element.innerHTML = content;
element.style.display = 'block';
} else {
element.innerHTML = '';
element.style.display = 'none';
}
return this;
};
legend.add = function() {
container = document.createElement('div');
container.className = 'wax-legends';
element = document.createElement('div');
element.className = 'wax-legend';
element.style.display = 'none';
container.appendChild(element);
return this;
};
return legend.add();
};
// Like underscore's bind, except it runs a function
// with no arguments off of an object.
//
// var map = ...;
// w(map).melt(myFunction);
//
// is equivalent to
//
// var map = ...;
// myFunction(map);
//
var w = function(self) {
self.melt = function(func, obj) {
return func.apply(obj, [self, obj]);
};
return self;
};
// Wax GridUtil
// ------------
// Wax header
var wax = wax || {};
// Request
// -------
// Request data cache. `callback(data)` where `data` is the response data.
wax.request = {
cache: {},
locks: {},
promises: {},
get: function(url, callback) {
// Cache hit.
if (this.cache[url]) {
return callback(this.cache[url][0], this.cache[url][1]);
// Cache miss.
} else {
this.promises[url] = this.promises[url] || [];
this.promises[url].push(callback);
// Lock hit.
if (this.locks[url]) return;
// Request.
var that = this;
this.locks[url] = true;
reqwest({
url: url + '?callback=grid',
type: 'jsonp',
jsonpCallback: 'callback',
success: function(data) {
that.locks[url] = false;
that.cache[url] = [null, data];
for (var i = 0; i < that.promises[url].length; i++) {
that.promises[url][i](that.cache[url][0], that.cache[url][1]);
}
},
error: function(err) {
that.locks[url] = false;
that.cache[url] = [err, null];
for (var i = 0; i < that.promises[url].length; i++) {
that.promises[url][i](that.cache[url][0], that.cache[url][1]);
}
}
});
}
}
};
wax = wax || {};
// A wrapper for reqwest jsonp to easily load TileJSON from a URL.
wax.tilejson = function(url, callback) {
reqwest({
url: url + '?callback=grid',
type: 'jsonp',
jsonpCallback: 'callback',
success: callback,
error: callback
});
};
var wax = wax || {};
wax.tooltip = {};
wax.tooltip = function(options) {
this._currentTooltip = undefined;
options = options || {};
if (options.animationOut) this.animationOut = options.animationOut;
if (options.animationIn) this.animationIn = options.animationIn;
};
// Helper function to determine whether a given element is a wax popup.
wax.tooltip.prototype.isPopup = function(el) {
return el && el.className.indexOf('wax-popup') !== -1;
};
// Get the active tooltip for a layer or create a new one if no tooltip exists.
// Hide any tooltips on layers underneath this one.
wax.tooltip.prototype.getTooltip = function(feature, context, index, evt) {
tooltip = document.createElement('div');
tooltip.className = 'wax-tooltip wax-tooltip-' + index;
tooltip.innerHTML = feature;
context.appendChild(tooltip);
return tooltip;
};
// Hide a given tooltip.
wax.tooltip.prototype.hideTooltip = function(el) {
if (!el) return;
var event;
var remove = function() {
if (this.parentNode) this.parentNode.removeChild(this);
};
if (el.style['-webkit-transition'] !== undefined && this.animationOut) {
event = 'webkitTransitionEnd';
} else if (el.style.MozTransition !== undefined && this.animationOut) {
event = 'transitionend';
}
if (event) {
el.addEventListener(event, remove, false);
el.addEventListener('transitionend', remove, false);
el.className += ' ' + this.animationOut;
} else {
if (el.parentNode) el.parentNode.removeChild(el);
}
};
// Expand a tooltip to be a "popup". Suspends all other tooltips from being
// shown until this popup is closed or another popup is opened.
wax.tooltip.prototype.click = function(feature, context, index) {
// Hide any current tooltips.
this.unselect(context);
var tooltip = this.getTooltip(feature, context, index);
var close = document.createElement('a');
close.href = '#close';
close.className = 'close';
close.innerHTML = 'Close';
var closeClick = wax.util.bind(function(ev) {
this.hideTooltip(tooltip);
this._currentTooltip = undefined;
ev.returnValue = false; // Prevents hash change.
if (ev.stopPropagation) ev.stopPropagation();
if (ev.preventDefault) ev.preventDefault();
return false;
}, this);
// IE compatibility.
if (close.addEventListener) {
close.addEventListener('click', closeClick, false);
} else if (close.attachEvent) {
close.attachEvent('onclick', closeClick);
}
tooltip.className += ' wax-popup';
tooltip.innerHTML = feature;
tooltip.appendChild(close);
this._currentTooltip = tooltip;
};
// Show a tooltip.
wax.tooltip.prototype.select = function(feature, context, layer_id, evt) {
if (!feature) return;
if (this.isPopup(this._currentTooltip)) return;
this._currentTooltip = this.getTooltip(feature, context, layer_id, evt);
context.style.cursor = 'pointer';
};
// Hide all tooltips on this layer and show the first hidden tooltip on the
// highest layer underneath if found.
wax.tooltip.prototype.unselect = function(context) {
if (this.isPopup(this._currentTooltip)) return;
context.style.cursor = 'default';
if (this._currentTooltip) {
this.hideTooltip(this._currentTooltip);
this._currentTooltip = undefined;
}
};
wax.tooltip.prototype.out = wax.tooltip.prototype.unselect;
wax.tooltip.prototype.over = wax.tooltip.prototype.select;
wax.tooltip.prototype.click = wax.tooltip.prototype.click;
wax.util = wax.util || {};
// Utils are extracted from other libraries or
// written from scratch to plug holes in browser compatibility.
wax.util = {
// From Bonzo
offset: function(el) {
// TODO: window margins
//
// Okay, so fall back to styles if offsetWidth and height are botched
// by Firefox.
var width = el.offsetWidth || parseInt(el.style.width, 10),
height = el.offsetHeight || parseInt(el.style.height, 10),
top = 0,
left = 0;
var calculateOffset = function(el) {
if (el === document.body || el === document.documentElement) return;
top += el.offsetTop;
left += el.offsetLeft;
// Add additional CSS3 transform handling.
// These features are used by Google Maps API V3.
var style = el.style.transform ||
el.style['-webkit-transform'] ||
el.style.MozTransform;
if (style) {
if (match = style.match(/translate\((.+)px, (.+)px\)/)) {
top += parseInt(match[2], 10);
left += parseInt(match[1], 10);
} else if (match = style.match(/translate3d\((.+)px, (.+)px, (.+)px\)/)) {
top += parseInt(match[2], 10);
left += parseInt(match[1], 10);
} else if (match = style.match(/matrix3d\(([\-\d,\s]+)\)/)) {
var pts = match[1].split(',');
top += parseInt(pts[13], 10);
left += parseInt(pts[12], 10);
}
}
};
calculateOffset(el);
try {
while (el = el.offsetParent) calculateOffset(el);
} catch(e) {
// Hello, internet explorer.
}
// Offsets from the body
top += document.body.offsetTop;
left += document.body.offsetLeft;
// Offsets from the HTML element
top += document.body.parentNode.offsetTop;
left += document.body.parentNode.offsetLeft;
// Firefox and other weirdos. Similar technique to jQuery's
// `doesNotIncludeMarginInBodyOffset`.
var htmlComputed = document.defaultView ?
window.getComputedStyle(document.body.parentNode, null) :
document.body.parentNode.currentStyle;
if (document.body.parentNode.offsetTop !==
parseInt(htmlComputed.marginTop, 10) &&
!isNaN(parseInt(htmlComputed.marginTop, 10))) {
top += parseInt(htmlComputed.marginTop, 10);
left += parseInt(htmlComputed.marginLeft, 10);
}
return {
top: top,
left: left,
height: height,
width: width
};
},
'$': function(x) {
return (typeof x === 'string') ?
document.getElementById(x) :
x;
},
// From underscore, minus funcbind for now.
// Returns a version of a function that always has the second parameter,
// `obj`, as `this`.
bind: function(func, obj) {
var args = Array.prototype.slice.call(arguments, 2);
return function() {
return func.apply(obj, args.concat(Array.prototype.slice.call(arguments)));
};
},
// From underscore
isString: function(obj) {
return !!(obj === '' || (obj && obj.charCodeAt && obj.substr));
},
// IE doesn't have indexOf
indexOf: function(array, item) {
var nativeIndexOf = Array.prototype.indexOf;
if (array === null) return -1;
var i, l;
if (nativeIndexOf && array.indexOf === nativeIndexOf) return array.indexOf(item);
for (i = 0, l = array.length; i < l; i++) if (array[i] === item) return i;
return -1;
},
// is this object an array?
isArray: Array.isArray || function(obj) {
return Object.prototype.toString.call(obj) === '[object Array]';
},
// From underscore: reimplement the ECMA5 `Object.keys()` methodb
keys: Object.keys || function(obj) {
var hasOwnProperty = Object.prototype.hasOwnProperty;
if (obj !== Object(obj)) throw new TypeError('Invalid object');
var keys = [];
for (var key in obj) if (hasOwnProperty.call(obj, key)) keys[keys.length] = key;
return keys;
},
// From quirksmode: normalize the offset of an event from the top-left
// of the page.
eventoffset: function(e) {
var posx = 0;
var posy = 0;
if (!e) var e = window.event;
if (e.pageX || e.pageY) {
// Good browsers
return {
x: e.pageX,
y: e.pageY
};
} else if (e.clientX || e.clientY) {
// Internet Explorer
var doc = document.documentElement, body = document.body;
var htmlComputed = document.body.parentNode.currentStyle;
var topMargin = parseInt(htmlComputed.marginTop, 10) || 0;
var leftMargin = parseInt(htmlComputed.marginLeft, 10) || 0;
return {
x: e.clientX + (doc && doc.scrollLeft || body && body.scrollLeft || 0) -
(doc && doc.clientLeft || body && body.clientLeft || 0) + leftMargin,
y: e.clientY + (doc && doc.scrollTop || body && body.scrollTop || 0) -
(doc && doc.clientTop || body && body.clientTop || 0) + topMargin
};
} else if (e.touches && e.touches.length === 1) {
// Touch browsers
return {
x: e.touches[0].pageX,
y: e.touches[0].pageY
};
}
}
};
// Wax header
var wax = wax || {};
wax.ol = wax.ol || {};
// An interaction toolkit for tiles that implement the
// [MBTiles UTFGrid spec](https://github.com/mapbox/mbtiles-spec)
wax.ol.Embedder =
OpenLayers.Class(OpenLayers.Control, {
initialize: function(options) {
options = options || {};
OpenLayers.Control.prototype.initialize.apply(this, [options || {}]);
},
// Add handlers to the map
setMap: function(map) {
if ($('#' + this.el + '-script').length) {
OpenLayers.Control.prototype.setMap.apply(this, arguments);
$(map.div).prepend($('<input type="text" class="embed-src" />')
.css({
'z-index': '9999999999',
'position': 'relative'
})
.val("<div id='" + this.el + "-script'>" + $('#' + this.el + '-script').html() + '</div>'));
}
this.activate();
},
CLASS_NAME: 'wax.ol.Embedder'
});
// Wax header
var wax = wax || {};
wax.ol = wax.ol || {};
var addEv = function(element, name, observer) {
if (element.addEventListener) {
element.addEventListener(name, observer, false);
} else if (element.attachEvent) {
element.attachEvent('on' + name, observer);
}
};
// An interaction toolkit for tiles that implement the
// [MBTiles UTFGrid spec](https://github.com/mapbox/mbtiles-spec)
wax.ol.Interaction =
OpenLayers.Class(OpenLayers.Control, {
feature: {},
handlerOptions: null,
handlers: null,
gm: new wax.GridManager(),
initialize: function(tilejson, options) {
this.options = options || {};
this.clickAction = this.options.clickAction || 'full';
this.gm = new wax.GridManager(tilejson);
OpenLayers.Control.prototype.initialize.apply(this, [this.options || {}]);
this.callbacks = this.options.callbacks || new wax.tooltip();
},
setMap: function(map) {
addEv(map.viewPortDiv, 'mousemove', wax.util.bind(this.getInfoForHover, this));
addEv(map.viewPortDiv, 'mouseout', wax.util.bind(this.resetLayers, this));
this.clickHandler = new OpenLayers.Handler.Click(
this, {
click: this.getInfoForClick
}
);
this.clickHandler.setMap(map);
this.clickHandler.activate();
map.events.on({
addlayer: this.resetLayers,
changelayer: this.resetLayers,
removelayer: this.resetLayers,
changebaselayer: this.resetLayers,
scope: this
});
OpenLayers.Control.prototype.setMap.apply(this, arguments);
},
// Get an Array of the stack of tiles under the mouse.
// This operates with pixels only, since there's no way
// to bubble through an element which is sitting on the map
// (like an SVG overlay).
//
// If no tiles are under the mouse, returns an empty array.
getTileStack: function(layers, pos) {
// If we don't have both an event and some tiles, it's nothing.
if (!layers || !pos) return [];
var tiles = [];
layerfound: for (var j = 0; j < layers.length; j++) {
for (var x = 0; x < layers[j].grid.length; x++) {
for (var y = 0; y < layers[j].grid[x].length; y++) {
if (layers[j].grid[x][y].imgDiv) {
var divpos = wax.util.offset(layers[j].grid[x][y].imgDiv);
} else {
var divpos = wax.util.offset(layers[j].grid[x][y].frame);
}
if (divpos &&
((divpos.top < pos.y) &&
((divpos.top + 256) > pos.y) &&
(divpos.left < pos.x) &&
((divpos.left + 256) > pos.x))) {
tiles.push(layers[j].grid[x][y]);
continue layerfound;
}
}
}
}
return tiles;
},
// Get all interactable layers
viableLayers: function() {
if (this._viableLayers) return this._viableLayers;
this._viableLayers = [];
for (var i in this.map.layers) {
// TODO: make better indication of whether
// this is an interactive layer
if ((this.map.layers[i].visibility === true) &&
(this.map.layers[i].CLASS_NAME === 'OpenLayers.Layer.TMS')) {
this._viableLayers.push(this.map.layers[i]);
}
}
return this._viableLayers;
},
resetLayers: function(evt) {
this._viableLayers = null;
// Fix a condition in which mouseout is called, but the user is really mousing
// over to a different tile.
var newTarget = evt.relatedTarget || evt.toElement;
if (newTarget && newTarget.className !== 'olTileImage') {
this.callbacks.out(this.map.viewPortDiv);
}
},
// React to a click mouse event
// This is the `pause` handler attached to the map.
getInfoForClick: function(evt) {
// If there's no event, this handler should not continue.
if (!evt) return;
var layers = this.viableLayers();
var pos = wax.util.eventoffset(evt);
var tiles = this.getTileStack(this.viableLayers(), pos);
var feature = null,
g = null;
var that = this;
for (var t = 0; t < tiles.length; t++) {
if (!tiles[t].url) continue;
this.gm.getGrid(tiles[t].url, function(err, g) {
if (!g) return;
var feature = g.getFeature(pos.x, pos.y, tiles[t].frame, {
format: that.clickAction
});
if (feature) {
switch (that.clickAction) {
case 'full':
that.callbacks.click(feature, tiles[t].layer.map.viewPortDiv, t);
break;
case 'location':
window.location = feature;
break;
}
}
});
}
},
// React to a hover mouse event, by finding all tiles,
// finding features, and calling `this.callbacks[]`
// This is the `click` handler attached to the map.
getInfoForHover: function(evt) {
// If there's no event, this handler should not proceed.
if (!evt) return;
var options = { format: 'teaser' };
var layers = this.viableLayers();
var pos = wax.util.eventoffset(evt);
var tiles = this.getTileStack(this.viableLayers(), pos);
var feature = null,
g = null;
var that = this;
for (var t = 0; t < tiles.length; t++) {
if (!tiles[t].url) continue;
// This features has already been loaded, or
// is currently being requested.
this.gm.getGrid(tiles[t].url, function(err, g) {
if (g && tiles[t]) {
var feature = g.getFeature(pos.x, pos.y, tiles[t].frame, options);
if (feature) {
if (!tiles[t]) return;
if (feature && that.feature[t] !== feature) {
that.feature[t] = feature;
that.callbacks.out(tiles[t].layer.map.div);
that.callbacks.over(feature, tiles[t].layer.map.div, t, evt);
} else if (!feature) {
that.feature[t] = null;
that.callbacks.out(tiles[t].layer.map.div);
} else {
}
} else {
// Request this feature
// TODO(tmcw) re-add layer
// Only nix this tooltip if the current tooltip is
// owned by this layer