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MapLayer.js
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MapLayer.js
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import { FALLBACK_PROJECTION, BLANK_TT_TREF } from '../utils/Constants';
export var MapMLLayer = L.Layer.extend({
// zIndex has to be set, for the case where the layer is added to the
// map before the layercontrol is used to control it (where autoZindex is used)
// e.g. in the raw MapML-Leaflet-Client index.html page.
options: {
maxNext: 10,
zIndex: 0,
maxZoom: 25
},
// initialize is executed before the layer is added to a map
initialize: function (href, content, options) {
// in the custom element, the attribute is actually 'src'
// the _href version is the URL received from layer-@src
var mapml;
if (href) {
this._href = href;
}
if (content) {
this._layerEl = content;
mapml = content.querySelector('map-feature,map-tile,map-extent') ? true : false;
if (!href && mapml) {
this._content = content;
}
}
L.setOptions(this, options);
this._container = L.DomUtil.create('div', 'leaflet-layer');
L.DomUtil.addClass(this._container,'mapml-layer');
this._imageContainer = L.DomUtil.create('div', 'leaflet-layer', this._container);
L.DomUtil.addClass(this._imageContainer,'mapml-image-container');
// this layer 'owns' a mapmlTileLayer, which is a subclass of L.GridLayer
// it 'passes' what tiles to load via the content of this._mapmlTileContainer
this._mapmlTileContainer = L.DomUtil.create('div', 'mapml-tile-container', this._container);
// hit the service to determine what its extent might be
// OR use the extent of the content provided
if (!mapml && content && content.hasAttribute('label')) this._title = content.getAttribute('label');
this._initCount = 0;
this._initExtent(mapml ? content : null);
// a default extent can't be correctly set without the map to provide
// its bounds , projection, zoom range etc, so if that stuff's not
// established by metadata in the content, we should use map properties
// to set the extent, but the map won't be available until the <layer>
// element is attached to the <map> element, wait for that to happen.
this.on('attached', this._validateExtent, this );
// weirdness. options is actually undefined here, despite the hardcoded
// options above. If you use this.options, you see the options defined
// above. Not going to change this, but failing to understand ATM.
// may revisit some time.
this.validProjection = true;
},
setZIndex: function (zIndex) {
this.options.zIndex = zIndex;
this._updateZIndex();
return this;
},
_updateZIndex: function () {
if (this._container && this.options.zIndex !== undefined && this.options.zIndex !== null) {
this._container.style.zIndex = this.options.zIndex;
}
},
_changeOpacity: function(e) {
if (e && e.target && e.target.value >=0 && e.target.value <= 1.0) {
this.changeOpacity(e.target.value);
}
},
changeOpacity: function(opacity) {
this._container.style.opacity = opacity;
if(this.opacityEl) this.opacityEl.value = opacity;
},
onAdd: function (map) {
if(this._extent && !this._validProjection(map)){
this.validProjection = false;
return;
}
this._map = map;
if(this._content){
if (!this._mapmlvectors) {
this._mapmlvectors = M.mapMlFeatures(this._content, {
// pass the vector layer a renderer of its own, otherwise leaflet
// puts everything into the overlayPane
renderer: M.featureRenderer(),
// pass the vector layer the container for the parent into which
// it will append its own container for rendering into
pane: this._container,
opacity: this.options.opacity,
projection:map.options.projection,
// each owned child layer gets a reference to the root layer
_leafletLayer: this,
static: true,
onEachFeature: function(properties, geometry) {
// need to parse as HTML to preserve semantics and styles
if (properties) {
var c = document.createElement('div');
c.classList.add("mapml-popup-content");
c.insertAdjacentHTML('afterbegin', properties.innerHTML);
geometry.bindPopup(c, {autoClose: false, minWidth: 165});
}
}
});
}
map.addLayer(this._mapmlvectors);
} else {
this.once('extentload', function() {
if(!this._validProjection(map)){
this.validProjection = false;
return;
}
if (!this._mapmlvectors) {
this._mapmlvectors = M.mapMlFeatures(this._content, {
// pass the vector layer a renderer of its own, otherwise leaflet
// puts everything into the overlayPane
renderer: M.featureRenderer(),
// pass the vector layer the container for the parent into which
// it will append its own container for rendering into
pane: this._container,
opacity: this.options.opacity,
projection:map.options.projection,
// each owned child layer gets a reference to the root layer
_leafletLayer: this,
static: true,
onEachFeature: function(properties, geometry) {
// need to parse as HTML to preserve semantics and styles
if (properties) {
var c = document.createElement('div');
c.classList.add("mapml-popup-content");
c.insertAdjacentHTML('afterbegin', properties.innerHTML);
geometry.bindPopup(c, {autoClose: false, minWidth: 165});
}
}
}).addTo(map);
}
this._setLayerElExtent();
},this);
}
if (!this._imageLayer) {
this._imageLayer = L.layerGroup();
}
map.addLayer(this._imageLayer);
// the layer._imageContainer property contains an element in which
// content will be maintained
//only add the layer if there are tiles to be rendered
if((!this._staticTileLayer || this._staticTileLayer._container === null) &&
this._mapmlTileContainer.getElementsByTagName("map-tiles").length > 0)
{
this._staticTileLayer = M.mapMLStaticTileLayer({
pane:this._container,
_leafletLayer: this,
className:"mapml-static-tile-layer",
tileContainer:this._mapmlTileContainer,
maxZoomBound:map.options.crs.options.resolutions.length - 1,
tileSize: map.options.crs.options.crs.tile.bounds.max.x,
});
map.addLayer(this._staticTileLayer);
}
// if the extent has been initialized and received, update the map,
if (this._extent) {
if (this._templateVars) {
this._templatedLayer = M.templatedLayer(this._templateVars,
{ pane: this._container,
_leafletLayer: this,
crs: this.crs
}).addTo(map);
}
} else {
this.once('extentload', function() {
if(!this._validProjection(map)){
this.validProjection = false;
return;
}
if (this._templateVars) {
this._templatedLayer = M.templatedLayer(this._templateVars,
{ pane: this._container,
_leafletLayer: this,
crs: this.crs
}).addTo(map);
this._setLayerElExtent();
}
}, this);
}
this._setLayerElExtent();
this.setZIndex(this.options.zIndex);
this.getPane().appendChild(this._container);
setTimeout(() => {
map.fire('checkdisabled');
}, 0);
map.on("popupopen", this._attachSkipButtons, this);
},
_validProjection : function(map){
let noLayer = false;
if(this._templateVars){
for(let template of this._templateVars)
if(!template.projectionMatch && template.projection !== map.options.projection) noLayer = true;
}
return !(noLayer || this.getProjection() !== map.options.projection.toUpperCase());
},
//sets the <layer-> elements .bounds property
_setLayerElExtent: function(){
let localBounds, localZoomRanges;
let layerTypes = ["_staticTileLayer","_imageLayer","_mapmlvectors","_templatedLayer"];
layerTypes.forEach((type) =>{
if(this[type]){
if(type === "_templatedLayer"){
for(let j =0;j<this[type]._templates.length;j++){
if(this[type]._templates[j].rel === "query") continue;
if(this[type]._templates[j].layer.layerBounds){
if(!localBounds){
localBounds = this[type]._templates[j].layer.layerBounds;
localZoomRanges = this[type]._templates[j].layer.zoomBounds;
} else {
localBounds.extend(this[type]._templates[j].layer.layerBounds.min);
localBounds.extend(this[type]._templates[j].layer.layerBounds.max);
}
}
}
} else {
if(this[type].layerBounds){
if(!localBounds){
localBounds = this[type].layerBounds;
localZoomRanges = this[type].zoomBounds;
} else{
localBounds.extend(this[type].layerBounds.min);
localBounds.extend(this[type].layerBounds.max);
}
}
}
}
});
if(localBounds){
//assigns the formatted extent object to .extent and spreads the zoom ranges to .extent also
this._layerEl.extent = (Object.assign(
M.convertAndFormatPCRS(localBounds,this._map),
{zoom:localZoomRanges}));
}
},
addTo: function (map) {
map.addLayer(this);
return this;
},
getEvents: function () {
return {zoomanim: this._onZoomAnim};
},
redraw: function() {
// for now, only redraw templated layers.
if (this._templatedLayer) {
this._templatedLayer.redraw();
}
},
_onZoomAnim: function(e) {
var toZoom = e.zoom,
zoom = this._extent ? this._extent.querySelector("map-input[type=zoom]") : null,
min = zoom && zoom.hasAttribute("min") ? parseInt(zoom.getAttribute("min")) : this._map.getMinZoom(),
max = zoom && zoom.hasAttribute("max") ? parseInt(zoom.getAttribute("max")) : this._map.getMaxZoom(),
canZoom = (toZoom < min && this._extent.zoomout) || (toZoom > max && this._extent.zoomin);
if (!(min <= toZoom && toZoom <= max)){
if (this._extent.zoomin && toZoom > max) {
// this._href is the 'original' url from which this layer came
// since we are following a zoom link we will be getting a new
// layer almost, resetting child content as appropriate
this._href = this._extent.zoomin;
this._layerEl.src = this._extent.zoomin;
// this.href is the "public" property. When a dynamic layer is
// accessed, this value changes with every new extent received
this.href = this._extent.zoomin;
this._layerEl.src = this._extent.zoomin;
} else if (this._extent.zoomout && toZoom < min) {
this._href = this._extent.zoomout;
this.href = this._extent.zoomout;
this._layerEl.src = this._extent.zoomout;
}
}
if (this._templatedLayer && canZoom ) {
// get the new extent
//this._initExtent();
}
},
onRemove: function (map) {
L.DomUtil.remove(this._container);
if(this._staticTileLayer) map.removeLayer(this._staticTileLayer);
if(this._mapmlvectors) map.removeLayer(this._mapmlvectors);
if(this._imageLayer) map.removeLayer(this._imageLayer);
if (this._templatedLayer) map.removeLayer(this._templatedLayer);
map.fire("checkdisabled");
map.off("popupopen", this._attachSkipButtons);
},
getZoomBounds: function () {
var ext = this._extent;
var zoom = ext ? ext.querySelector('[type=zoom]') : undefined,
min = zoom && zoom.hasAttribute('min') ? zoom.getAttribute('min') : this._map.getMinZoom(),
max = zoom && zoom.hasAttribute('max') ? zoom.getAttribute('max') : this._map.getMaxZoom();
var bounds = {};
bounds.min = Math.min(min,max);
bounds.max = Math.max(min,max);
return bounds;
},
_transformDeprectatedInput: function (i) {
var type = i.getAttribute("type").toLowerCase();
if (type === "xmin" || type === "ymin" || type === "xmax" || type === "ymax") {
i.setAttribute("type", "location");
i.setAttribute("units","tcrs");
switch (type) {
case "xmin":
i.setAttribute("axis","x");
i.setAttribute("position","top-left");
break;
case "ymin":
i.setAttribute("axis","y");
i.setAttribute("position","top-left");
break;
case "xmax":
i.setAttribute("axis","x");
i.setAttribute("position","bottom-right");
break;
case "ymax":
i.setAttribute("axis","y");
i.setAttribute("position","bottom-right");
break;
}
}
},
// retrieve the (projected, scaled) layer extent for the current map zoom level
getLayerExtentBounds: function(map) {
if (!this._extent) return;
var zoom = map.getZoom(), projection = map.options.projection,
ep = this._extent.getAttribute("units"),
projecting = (projection !== ep),
p;
var xmin,ymin,xmax,ymax,v1,v2,extentZoomValue;
// todo: create an array of min values, converted to tcrs units
// take the Math.min of all of them.
v1 = this._extent.querySelector('[type=xmin]').getAttribute('min');
v2 = this._extent.querySelector('[type=xmax]').getAttribute('min');
xmin = Math.min(v1,v2);
v1 = this._extent.querySelector('[type=xmin]').getAttribute('max');
v2 = this._extent.querySelector('[type=xmax]').getAttribute('max');
xmax = Math.max(v1,v2);
v1 = this._extent.querySelector('[type=ymin]').getAttribute('min');
v2 = this._extent.querySelector('[type=ymax]').getAttribute('min');
ymin = Math.min(v1,v2);
v1 = this._extent.querySelector('[type=ymin]').getAttribute('max');
v2 = this._extent.querySelector('[type=ymax]').getAttribute('max');
ymax = Math.max(v1,v2);
// WGS84 can be converted to Tiled CRS units
if (projecting) {
//project and scale to M[projection] from WGS84
p = M[projection];
var corners = [
p.latLngToPoint(L.latLng([ymin,xmin]),zoom),
p.latLngToPoint(L.latLng([ymax,xmax]),zoom),
p.latLngToPoint(L.latLng([ymin,xmin]),zoom),
p.latLngToPoint(L.latLng([ymin,xmax]),zoom)
];
return L.bounds(corners);
} else {
// if the zoom level of the extent does not match that of the map
extentZoomValue = parseInt(this._extent.querySelector('[type=zoom]').getAttribute('value'));
if (extentZoomValue !== zoom) {
// convert the extent bounds to corresponding bounds at the current map zoom
p = M[projection];
return L.bounds(
p.latLngToPoint(p.pointToLatLng(L.point(xmin,ymin),extentZoomValue),zoom),
p.latLngToPoint(p.pointToLatLng(L.point(xmax,ymax),extentZoomValue),zoom));
} else {
// the extent's zoom value === map.getZoom(), return the bounds
return L.bounds(L.point(xmin,ymin), L.point(xmax,ymax));
}
}
},
getAttribution: function () {
return this.options.attribution;
},
getLayerUserControlsHTML: function () {
var fieldset = L.DomUtil.create('fieldset', 'mapml-layer-item'),
input = L.DomUtil.create('input'),
layerItemName = L.DomUtil.create('span', 'mapml-layer-item-name'),
settingsButtonNameIcon = L.DomUtil.create('span'),
layerItemProperty = L.DomUtil.create('div', 'mapml-layer-item-properties', fieldset),
layerItemSettings = L.DomUtil.create('div', 'mapml-layer-item-settings', fieldset),
itemToggleLabel = L.DomUtil.create('label', 'mapml-layer-item-toggle', layerItemProperty),
layerItemControls = L.DomUtil.create('div', 'mapml-layer-item-controls', layerItemProperty),
opacityControl = L.DomUtil.create('details', 'mapml-layer-item-opacity mapml-control-layers', layerItemSettings),
opacity = L.DomUtil.create('input'),
opacityControlSummary = L.DomUtil.create('summary'),
svgSettingsControlIcon = L.SVG.create('svg'),
settingsControlPath1 = L.SVG.create('path'),
settingsControlPath2 = L.SVG.create('path'),
mapEl = this._layerEl.parentNode;
this.opacityEl = opacity;
// append the paths in svg for the remove layer and toggle icons
svgSettingsControlIcon.setAttribute('viewBox', '0 0 24 24');
svgSettingsControlIcon.setAttribute('height', '22');
svgSettingsControlIcon.setAttribute('width', '22');
settingsControlPath1.setAttribute('d', 'M0 0h24v24H0z');
settingsControlPath1.setAttribute('fill', 'none');
settingsControlPath2.setAttribute('d', 'M12 8c1.1 0 2-.9 2-2s-.9-2-2-2-2 .9-2 2 .9 2 2 2zm0 2c-1.1 0-2 .9-2 2s.9 2 2 2 2-.9 2-2-.9-2-2-2zm0 6c-1.1 0-2 .9-2 2s.9 2 2 2 2-.9 2-2-.9-2-2-2z');
svgSettingsControlIcon.appendChild(settingsControlPath1);
svgSettingsControlIcon.appendChild(settingsControlPath2);
layerItemSettings.hidden = true;
settingsButtonNameIcon.setAttribute('aria-hidden', true);
let removeControlButton = L.DomUtil.create('button', 'mapml-layer-item-remove-control', layerItemControls);
removeControlButton.type = 'button';
removeControlButton.title = 'Remove Layer';
removeControlButton.innerHTML = "<span aria-hidden='true'>✕</span>";
removeControlButton.classList.add('mapml-button');
//L.DomEvent.disableClickPropagation(removeControlButton);
L.DomEvent.on(removeControlButton, 'click', L.DomEvent.stop);
L.DomEvent.on(removeControlButton, 'click', (e)=>{
mapEl.removeChild(e.target.closest("fieldset").querySelector("span").layer._layerEl);
}, this);
let itemSettingControlButton = L.DomUtil.create('button', 'mapml-layer-item-settings-control', layerItemControls);
itemSettingControlButton.type = 'button';
itemSettingControlButton.title = 'Layer Settings';
itemSettingControlButton.setAttribute('aria-expanded', false);
itemSettingControlButton.classList.add('mapml-button');
L.DomEvent.on(itemSettingControlButton, 'click', (e)=>{
if(layerItemSettings.hidden == true){
itemSettingControlButton.setAttribute('aria-expanded', true);
layerItemSettings.hidden = false;
} else {
itemSettingControlButton.setAttribute('aria-expanded', false);
layerItemSettings.hidden = true;
}
}, this);
input.defaultChecked = this._map ? true: false;
input.type = 'checkbox';
layerItemName.layer = this;
if (this._legendUrl) {
var legendLink = document.createElement('a');
legendLink.text = ' ' + this._title;
legendLink.href = this._legendUrl;
legendLink.target = '_blank';
legendLink.draggable = false;
layerItemName.appendChild(legendLink);
} else {
layerItemName.innerHTML = this._title;
}
layerItemName.id = 'mapml-layer-item-name-{' + L.stamp(layerItemName) + '}';
opacityControlSummary.innerText = 'Opacity';
opacityControlSummary.id = 'mapml-layer-item-opacity-' + L.stamp(opacityControlSummary);
opacityControl.appendChild(opacityControlSummary);
opacityControl.appendChild(opacity);
opacity.setAttribute('type','range');
opacity.setAttribute('min', '0');
opacity.setAttribute('max','1.0');
opacity.setAttribute('value', this._container.style.opacity || '1.0');
opacity.setAttribute('step','0.1');
opacity.setAttribute('aria-labelledby', opacityControlSummary.id);
opacity.value = this._container.style.opacity || '1.0';
fieldset.setAttribute("aria-grabbed", "false");
fieldset.setAttribute('aria-labelledby', layerItemName.id);
fieldset.onmousedown = (downEvent) => {
if(downEvent.target.tagName.toLowerCase() === "input" || downEvent.target.tagName.toLowerCase() === "select") return;
downEvent.preventDefault();
let control = fieldset,
controls = fieldset.parentNode,
moving = false, yPos = downEvent.clientY;
document.body.onmousemove = (moveEvent) => {
moveEvent.preventDefault();
// Fixes flickering by only moving element when there is enough space
let offset = moveEvent.clientY - yPos;
moving = Math.abs(offset) > 5 || moving;
if( (controls && !moving) || (controls && controls.childElementCount <= 1) ||
controls.getBoundingClientRect().top > control.getBoundingClientRect().bottom ||
controls.getBoundingClientRect().bottom < control.getBoundingClientRect().top){
return;
}
controls.classList.add("mapml-draggable");
control.style.transform = "translateY("+ offset +"px)";
control.style.pointerEvents = "none";
let x = moveEvent.clientX, y = moveEvent.clientY,
root = mapEl.tagName === "MAPML-VIEWER" ? mapEl.shadowRoot : mapEl.querySelector(".mapml-web-map").shadowRoot,
elementAt = root.elementFromPoint(x, y),
swapControl = !elementAt || !elementAt.closest("fieldset") ? control : elementAt.closest("fieldset");
swapControl = Math.abs(offset) <= swapControl.offsetHeight ? control : swapControl;
control.setAttribute("aria-grabbed", 'true');
control.setAttribute("aria-dropeffect", "move");
if(swapControl && controls === swapControl.parentNode){
swapControl = swapControl !== control.nextSibling? swapControl : swapControl.nextSibling;
if(control !== swapControl){
yPos = moveEvent.clientY;
control.style.transform = null;
}
controls.insertBefore(control, swapControl);
}
};
document.body.onmouseup = () => {
control.setAttribute("aria-grabbed", "false");
control.removeAttribute("aria-dropeffect");
control.style.pointerEvents = null;
control.style.transform = null;
let controlsElems = controls.children,
zIndex = 1;
for(let c of controlsElems){
let layerEl = c.querySelector("span").layer._layerEl;
layerEl.setAttribute("data-moving","");
mapEl.insertAdjacentElement("beforeend", layerEl);
layerEl.removeAttribute("data-moving");
layerEl._layer.setZIndex(zIndex);
zIndex++;
}
controls.classList.remove("mapml-draggable");
document.body.onmousemove = document.body.onmouseup = null;
};
};
L.DomEvent.on(opacity,'change', this._changeOpacity, this);
itemToggleLabel.appendChild(input);
itemToggleLabel.appendChild(layerItemName);
itemSettingControlButton.appendChild(settingsButtonNameIcon);
settingsButtonNameIcon.appendChild(svgSettingsControlIcon);
if (this._styles) {
layerItemSettings.appendChild(this._styles);
}
if (this._userInputs) {
var frag = document.createDocumentFragment();
var templates = this._templateVars;
if (templates) {
for (var i=0;i<templates.length;i++) {
var template = templates[i];
for (var j=0;j<template.values.length;j++) {
var mapmlInput = template.values[j],
id = '#'+mapmlInput.getAttribute('id');
// don't add it again if it is referenced > once
if (mapmlInput.tagName.toLowerCase() === 'map-select' && !frag.querySelector(id)) {
// generate a <details><summary></summary><select...></details>
var selectdetails = L.DomUtil.create('details', 'mapml-layer-item-time mapml-control-layers', frag),
selectsummary = L.DomUtil.create('summary'),
selectSummaryLabel = L.DomUtil.create('label');
selectSummaryLabel.innerText = mapmlInput.getAttribute('name');
selectSummaryLabel.setAttribute('for', mapmlInput.getAttribute('id'));
selectsummary.appendChild(selectSummaryLabel);
selectdetails.appendChild(selectsummary);
selectdetails.appendChild(mapmlInput.htmlselect);
}
}
}
}
layerItemSettings.appendChild(frag);
}
return fieldset;
},
_initExtent: function(content) {
if (!this._href && !content) {return;}
var layer = this;
// the this._href (comes from layer@src) should take precedence over
// content of the <layer> element, but if no this._href / src is provided
// but there *is* child content of the <layer> element (which is copied/
// referred to by this._content), we should use that content.
if (this._href) {
var xhr = new XMLHttpRequest();
// xhr.withCredentials = true;
_get(this._href, _processInitialExtent);
} else if (content) {
// may not set this._extent if it can't be done from the content
// (eg a single point) and there's no map to provide a default yet
_processInitialExtent.call(this, content);
}
function _get(url, fCallback ) {
xhr.onreadystatechange = function () {
if(this.readyState === this.DONE) {
if (this.status === 400 ||
this.status === 404 ||
this.status === 500 ||
this.status === 406) {
layer.error = true;
layer.fire('extentload', layer, true);
xhr.abort();
}
}};
xhr.onload = fCallback;
xhr.onerror = function () {
layer.error = true;
layer.fire('extentload', layer, true);
};
xhr.open("GET", url);
xhr.setRequestHeader("Accept",M.mime);
xhr.overrideMimeType("text/xml");
xhr.send();
}
function transcribe(element) {
var select = document.createElement("select");
var elementAttrNames = element.getAttributeNames();
for(let i = 0; i < elementAttrNames.length; i++){
select.setAttribute(elementAttrNames[i], element.getAttribute(elementAttrNames[i]));
}
var options = element.children;
for(let i = 0; i < options.length; i++){
var option = document.createElement("option");
var optionAttrNames = options[i].getAttributeNames();
for (let j = 0; j < optionAttrNames; j++){
option.setAttribute(optionAttrNames[j], options[i].getAttribute(optionAttrNames[j]));
}
option.innerHTML = options[i].innerHTML;
select.appendChild(option);
}
return select;
}
function _processInitialExtent(content) {
var mapml = this.responseXML || content;
if(mapml.querySelector && mapml.querySelector('map-feature'))layer._content = mapml;
if(!this.responseXML && this.responseText) mapml = new DOMParser().parseFromString(this.responseText,'text/xml');
if (this.readyState === this.DONE && mapml.querySelector && !mapml.querySelector("parsererror")) {
var serverExtent = mapml.querySelector('map-extent') || mapml.querySelector('map-meta[name=projection]'), projection;
if (serverExtent.tagName.toLowerCase() === "map-extent" && serverExtent.hasAttribute('units')){
projection = serverExtent.getAttribute("units");
} else if (serverExtent.tagName.toLowerCase() === "map-meta" && serverExtent.hasAttribute('content')) {
projection = M.metaContentToObject(serverExtent.getAttribute('content')).content;
}
var projectionMatch = projection && projection === layer.options.mapprojection,
metaExtent = mapml.querySelector('map-meta[name=extent]'),
selectedAlternate = !projectionMatch && mapml.querySelector('map-head map-link[rel=alternate][projection='+layer.options.mapprojection+']'),
base =
(new URL(mapml.querySelector('map-base') ? mapml.querySelector('map-base').getAttribute('href') : mapml.baseURI || this.responseURL, this.responseURL)).href;
if (!serverExtent) {
serverExtent = layer._synthesizeExtent(mapml);
// the mapml resource does not have a (complete) extent form, save
// its content if any so we don't have to revisit the server, ever.
if (mapml.querySelector('map-feature,map-tile')) {
layer._content = mapml;
}
} else if (!projectionMatch && selectedAlternate && selectedAlternate.hasAttribute('href')) {
layer.fire('changeprojection', {href: (new URL(selectedAlternate.getAttribute('href'), base)).href}, false);
return;
} else if (!projectionMatch && layer._map && layer._map.options.mapEl.querySelectorAll("layer-").length === 1){
layer._map.options.mapEl.projection = projection;
return;
} else if (serverExtent.querySelector('map-link[rel=tile],map-link[rel=image],map-link[rel=features],map-link[rel=query]') &&
serverExtent.hasAttribute("units")) {
layer._templateVars = [];
// set up the URL template and associated inputs (which yield variable values when processed)
var tlist = serverExtent.querySelectorAll('map-link[rel=tile],map-link[rel=image],map-link[rel=features],map-link[rel=query]'),
varNamesRe = (new RegExp('(?:\{)(.*?)(?:\})','g')),
zoomInput = serverExtent.querySelector('map-input[type="zoom" i]'),
includesZoom = false, extentFallback = {};
extentFallback.zoom = 0;
if (metaExtent){
// if the extent is not in PCRS or GCRS, the user should supply
// a zoom=n key within the meta content, so that the PCRS bounds
// can be calculated
let content = M.metaContentToObject(metaExtent.getAttribute("content"));
// the extentFallback.zoom is used to calculate the PCRS bounds
extentFallback.zoom = content.zoom || extentFallback.zoom;
let metaKeys = Object.keys(content);
for(let i =0;i<metaKeys.length;i++){
if(!metaKeys[i].includes("zoom")){
// deduce the CS from the first recognized axis name, quit
extentFallback.cs = M.axisToCS(metaKeys[i].split("-")[2]);
break;
}
}
let axes = M.csToAxes(extentFallback.cs);
extentFallback.bounds = M.boundsToPCRSBounds(
L.bounds(L.point(+content[`top-left-${axes[0]}`],+content[`top-left-${axes[1]}`]),
L.point(+content[`bottom-right-${axes[0]}`],+content[`bottom-right-${axes[1]}`])),
extentFallback.zoom, projection, extentFallback.cs);
} else {
extentFallback.bounds = M[projection].options.crs.pcrs.bounds;
extentFallback.cs = "PCRS";
}
for (var i=0;i< tlist.length;i++) {
var t = tlist[i], template = t.getAttribute('tref');
if(!template){
template = BLANK_TT_TREF;
let blankInputs = mapml.querySelectorAll('map-input');
for (let i of blankInputs){
template += `{${i.getAttribute("name")}}`;
}
}
var v,
title = t.hasAttribute('title') ? t.getAttribute('title') : 'Query this layer',
vcount=template.match(varNamesRe),
trel = (!t.hasAttribute('rel') || t.getAttribute('rel').toLowerCase() === 'tile') ? 'tile' : t.getAttribute('rel').toLowerCase(),
ttype = (!t.hasAttribute('type')? 'image/*':t.getAttribute('type').toLowerCase()),
inputs = [],
tms = t && t.hasAttribute("tms");
var zoomBounds = mapml.querySelector('map-meta[name=zoom]')?
M.metaContentToObject(mapml.querySelector('map-meta[name=zoom]').getAttribute('content')):
undefined;
while ((v = varNamesRe.exec(template)) !== null) {
var varName = v[1],
inp = serverExtent.querySelector('map-input[name='+varName+'],map-select[name='+varName+']');
if (inp) {
// if location input is missing min/max, force set the
// fallback min/max from the extentFallback
if ((inp.hasAttribute("type") && inp.getAttribute("type")==="location") &&
(!inp.hasAttribute("min" || !inp.hasAttribute("max"))) &&
(inp.hasAttribute("axis") && !["i","j"].includes(inp.getAttribute("axis").toLowerCase()))){
zoomInput.setAttribute("value", extentFallback.zoom);
// set location input min/max axis values based on calculated
// and potentially converted from PCRS bounds read
// from the <map-meta> element. This is a fallback, but it only
// works when the file includes location inputs.
let axis = inp.getAttribute("axis"),
axisBounds = M.convertPCRSBounds(extentFallback.bounds, extentFallback.zoom, projection, M.axisToCS(axis));
inp.setAttribute("min", axisBounds.min[M.axisToXY(axis)]);
inp.setAttribute("max", axisBounds.max[M.axisToXY(axis)]);
}
inputs.push(inp);
includesZoom = includesZoom || inp.hasAttribute("type") && inp.getAttribute("type").toLowerCase() === "zoom";
if (inp.hasAttribute('shard')) {
var id = inp.getAttribute('list');
inp.servers = [];
var servers = serverExtent.querySelectorAll('map-datalist#'+id + ' > map-option');
if (servers.length === 0 && inp.hasAttribute('value')) {
servers = inp.getAttribute('value').split('');
}
for (var s=0;s < servers.length;s++) {
if (servers[s].getAttribute) {
inp.servers.push(servers[s].getAttribute('value'));
} else {
inp.servers.push(servers[s]);
}
}
} else if (inp.tagName.toLowerCase() === 'map-select') {
// use a throwaway div to parse the input from MapML into HTML
var div =document.createElement("div");
div.insertAdjacentHTML("afterbegin",inp.outerHTML);
// parse
inp.htmlselect = div.querySelector("map-select");
inp.htmlselect = transcribe(inp.htmlselect);
// this goes into the layer control, so add a listener
L.DomEvent.on(inp.htmlselect, 'change', layer.redraw, layer);
if (!layer._userInputs) {
layer._userInputs = [];
}
layer._userInputs.push(inp.htmlselect);
}
// TODO: if this is an input@type=location
// get the TCRS min,max attribute values at the identified zoom level
// save this information as properties of the serverExtent,
// perhaps as a bounds object so that it can be easily used
// later by the layer control to determine when to enable
// disable the layer for drawing.
} else {
console.log('input with name='+varName+' not found for template variable of same name');
// no match found, template won't be used
break;
}
}
if (template && vcount.length === inputs.length || template === BLANK_TT_TREF) {
if (trel === 'query') {
layer.queryable = true;
}
if(!includesZoom && zoomInput) {
inputs.push(zoomInput);
}
// template has a matching input for every variable reference {varref}
layer._templateVars.push({
template:decodeURI(new URL(template, base)),
linkEl: t,
title:title,
rel: trel,
type: ttype,
values: inputs,
zoomBounds:zoomBounds,
extentPCRSFallback: {bounds: extentFallback.bounds},
projectionMatch: projectionMatch || selectedAlternate,
projection:serverExtent.getAttribute("units") || FALLBACK_PROJECTION,
tms:tms,
});
}
}
}
layer._parseLicenseAndLegend(mapml, layer);
layer._extent = serverExtent;
var zoomin = mapml.querySelector('map-link[rel=zoomin]'),
zoomout = mapml.querySelector('map-link[rel=zoomout]');
delete layer._extent.zoomin;
delete layer._extent.zoomout;
if (zoomin) {
layer._extent.zoomin = (new URL(zoomin.getAttribute('href'), base)).href;
}
if (zoomout) {
layer._extent.zoomout = (new URL(zoomout.getAttribute('href'), base)).href;
}
if (layer._templatedLayer) {
layer._templatedLayer.reset(layer._templateVars);
}
if (mapml.querySelector('map-tile')) {
var tiles = document.createElement("map-tiles"),
zoom = mapml.querySelector('map-meta[name=zoom][content]') || mapml.querySelector('map-input[type=zoom][value]');
tiles.setAttribute("zoom", zoom && zoom.getAttribute('content') || zoom && zoom.getAttribute('value') || "0");
var newTiles = mapml.getElementsByTagName('map-tile');
for (var nt=0;nt<newTiles.length;nt++) {
tiles.appendChild(document.importNode(newTiles[nt], true));
}
layer._mapmlTileContainer.appendChild(tiles);
}
M.parseStylesheetAsHTML(mapml, base, layer._container);
var styleLinks = mapml.querySelectorAll('map-link[rel=style],map-link[rel="self style"],map-link[rel="style self"]');
if (styleLinks.length > 1) {
var stylesControl = document.createElement('details'),
stylesControlSummary = document.createElement('summary');
stylesControlSummary.innerText = 'Style';
stylesControl.appendChild(stylesControlSummary);
var changeStyle = function (e) {
layer.fire('changestyle', {src: e.target.getAttribute("data-href")}, false);
};
for (var j=0;j<styleLinks.length;j++) {
var styleOption = document.createElement('div'),
styleOptionInput = styleOption.appendChild(document.createElement('input'));
styleOptionInput.setAttribute("type", "radio");
styleOptionInput.setAttribute("id", "rad-"+L.stamp(styleOptionInput));
styleOptionInput.setAttribute("name", "styles-"+layer._title);
styleOptionInput.setAttribute("value", styleLinks[j].getAttribute('title'));
styleOptionInput.setAttribute("data-href", new URL(styleLinks[j].getAttribute('href'),base).href);
var styleOptionLabel = styleOption.appendChild(document.createElement('label'));
styleOptionLabel.setAttribute("for", "rad-"+L.stamp(styleOptionInput));
styleOptionLabel.innerText = styleLinks[j].getAttribute('title');
if (styleLinks[j].getAttribute("rel") === "style self" || styleLinks[j].getAttribute("rel") === "self style") {
styleOptionInput.checked = true;
}
stylesControl.appendChild(styleOption);
L.DomUtil.addClass(stylesControl,'mapml-layer-item-style mapml-control-layers');
L.DomEvent.on(styleOptionInput,'click', changeStyle, layer);
}
layer._styles = stylesControl;
}
if (mapml.querySelector('map-title')) {
layer._title = mapml.querySelector('map-title').textContent.trim();
} else if (mapml instanceof Element && mapml.hasAttribute('label')) {
layer._title = mapml.getAttribute('label').trim();
}
if (layer._map) {
layer._validateExtent();
// if the layer is checked in the layer control, force the addition
// of the attribution just received
if (layer._map.hasLayer(layer)) {
layer._map.attributionControl.addAttribution(layer.getAttribution());
}
//layer._map.fire('moveend', layer);
}
} else {
layer.error = true;
}
layer.fire('extentload', layer, false);
layer._layerEl.dispatchEvent(new CustomEvent('extentload', {detail: layer,}));
}
},
_createExtent: function () {
var extent = document.createElement('map-extent'),
xminInput = document.createElement('map-input'),
yminInput = document.createElement('map-input'),
xmaxInput = document.createElement('map-input'),
ymaxInput = document.createElement('map-input'),
zoom = document.createElement('map-input'),
projection = document.createElement('map-input');
zoom.setAttribute('type','zoom');
zoom.setAttribute('min','0');
zoom.setAttribute('max','0');
xminInput.setAttribute('type','xmin');
xminInput.setAttribute('min','');
xminInput.setAttribute('max','');
yminInput.setAttribute('type','ymin');
yminInput.setAttribute('min','');
yminInput.setAttribute('max','');
xmaxInput.setAttribute('type','xmax');
xmaxInput.setAttribute('min','');
xmaxInput.setAttribute('max','');
ymaxInput.setAttribute('type','ymax');
ymaxInput.setAttribute('min','');
ymaxInput.setAttribute('max','');
projection.setAttribute('type','projection');
projection.setAttribute('value','WGS84');
extent.appendChild(xminInput);
extent.appendChild(yminInput);
extent.appendChild(xmaxInput);
extent.appendChild(ymaxInput);
extent.appendChild(zoom);
extent.appendChild(projection);
return extent;
},
_validateExtent: function () {
// TODO: change so that the _extent bounds are set based on inputs
var serverExtent = this._extent;
if (!serverExtent || !serverExtent.querySelector || !this._map) {
return;
}
if (serverExtent.querySelector('[type=xmin][min=""], [type=xmin][max=""], [type=xmax][min=""], [type=xmax][max=""], [type=ymin][min=""], [type=ymin][max=""]')) {
var xmin = serverExtent.querySelector('[type=xmin]'),
ymin = serverExtent.querySelector('[type=ymin]'),
xmax = serverExtent.querySelector('[type=xmax]'),
ymax = serverExtent.querySelector('[type=ymax]'),
proj = serverExtent.querySelector('[type=projection][value]'),
bounds, projection;
if (proj) {
projection = proj.getAttribute('value');
if (projection && projection === 'WGS84') {
bounds = this._map.getBounds();
xmin.setAttribute('min',bounds.getWest());
xmin.setAttribute('max',bounds.getEast());
ymin.setAttribute('min',bounds.getSouth());
ymin.setAttribute('max',bounds.getNorth());
xmax.setAttribute('min',bounds.getWest());
xmax.setAttribute('max',bounds.getEast());
ymax.setAttribute('min',bounds.getSouth());
ymax.setAttribute('max',bounds.getNorth());
} else if (projection) {
// needs testing. Also, this will likely be
// messing with a server-generated extent.
bounds = this._map.getPixelBounds();
xmin.setAttribute('min',bounds.getBottomLeft().x);
xmin.setAttribute('max',bounds.getTopRight().x);
ymin.setAttribute('min',bounds.getTopRight().y);
ymin.setAttribute('max',bounds.getBottomLeft().y);
xmax.setAttribute('min',bounds.getBottomLeft().x);
xmax.setAttribute('max',bounds.getTopRight().x);
ymax.setAttribute('min',bounds.getTopRight().y);
ymax.setAttribute('max',bounds.getBottomLeft().y);
}
} else {
this.error = true;
}
}
if (serverExtent.querySelector('[type=zoom][min=""], [type=zoom][max=""]')) {
var zoom = serverExtent.querySelector('[type=zoom]');
zoom.setAttribute('min',this._map.getMinZoom());
zoom.setAttribute('max',this._map.getMaxZoom());
}
var lp = serverExtent.hasAttribute("units") ? serverExtent.getAttribute("units") : null;
if (lp && M[lp]) {
this.crs = M[lp];
} else {
this.crs = M.OSMTILE;
}
},
_getMapMLExtent: function (bounds, zooms, proj) {
var extent = this._createExtent(),
zoom = extent.querySelector('map-input[type=zoom]'),