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MapExtend.js
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309 lines (289 loc) · 9.29 KB
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/* Copyright© 2000 - 2023 SuperMap Software Co.Ltd. All rights reserved.
* This program are made available under the terms of the Apache License, Version 2.0
* which accompanies this distribution and is available at http://www.apache.org/licenses/LICENSE-2.0.html.*/
// import mapboxgl from 'mapbox-gl';
import SymbolHandler from '../overlay/symbol/SymbolHandler';
/**
* @function MapExtend
* @description 扩展了 mapboxgl.Map 对图层相关的操作。
* @private
*/
const mapboxgl = window.mapboxgl;
export var MapExtend = (function () {
/**
* 获取symbol管理
* @param {*} map
* @returns {object}
*/
const getSymbolHandler = (map) => {
if (!mapboxgl.Map.prototype.symbolHandler) {
mapboxgl.Map.prototype.symbolHandler = new SymbolHandler(map);
}
return mapboxgl.Map.prototype.symbolHandler;
}
mapboxgl.Map.prototype.overlayLayersManager = {};
if (mapboxgl.Map.prototype.addLayerBak === undefined) {
mapboxgl.Map.prototype.addLayerBak = mapboxgl.Map.prototype.addLayer;
mapboxgl.Map.prototype.addLayer = function (layer, before) {
if (layer.symbol) {
getSymbolHandler(this).addLayer(layer, before);
return this;
}
if (layer.source || layer.type === 'custom' || layer.type === 'background') {
this.addLayerBak(layer, before);
return this;
}
if (this.overlayLayersManager[layer.id] || this.style._layers[layer.id]) {
this.fire('error', {
error: new Error('A layer with this id already exists.')
});
return;
}
addLayer(layer, this);
this.overlayLayersManager[layer.id] = layer;
return this;
};
}
mapboxgl.Map.prototype.getLayer = function (id) {
if (this.overlayLayersManager[id]) {
return this.overlayLayersManager[id];
}
return this.style.getLayer(id);
};
mapboxgl.Map.prototype.moveLayer = function (id, beforeId) {
if (this.overlayLayersManager[id]) {
this.overlayLayersManager[id].moveLayer
? this.overlayLayersManager[id].moveLayer(id, beforeId)
: moveLayer(id, beforeId);
return this;
}
if (this.style._layers[id]) {
this.style.moveLayer(id, beforeId);
this._update(true);
return this;
}
};
mapboxgl.Map.prototype.removeLayer = function (id) {
if (this.overlayLayersManager[id]) {
removeLayer(this.overlayLayersManager[id]);
delete this.overlayLayersManager[id];
return this;
}
this.style.removeLayer(id);
this._update(true);
return this;
};
//目前扩展的overlayer，只支持显示或隐藏图层操作
mapboxgl.Map.prototype.setLayoutProperty = function (layerID, name, value) {
if (this.overlayLayersManager[layerID]) {
if (name === 'visibility') {
if (value === 'visible') {
value = true;
} else {
value = false;
}
setVisibility(this.overlayLayersManager[layerID], value);
this.style.fire('data', { dataType: 'style' });
}
return this;
}
this.style.setLayoutProperty(layerID, name, value);
this._update(true);
return this;
};
mapboxgl.Map.prototype.updateTransform = function (units, originX, originY, centerX, centerY, width, height) {
this.transform.units = units;
var mercatorZfromAltitude = this.mercatorZfromAltitude;
mapboxgl.MercatorCoordinate.fromLngLat = function (lngLatLike, altitude) {
altitude = altitude || 0;
const lngLat = mapboxgl.LngLat.convert(lngLatLike);
return new mapboxgl.MercatorCoordinate(
(lngLat.lng - originX) / width,
(originY - lngLat.lat) / height,
mercatorZfromAltitude(altitude, lngLat.lat)
);
};
mapboxgl.MercatorCoordinate.prototype.toLngLat = function () {
return new mapboxgl.LngLat(this.x * width + originX, originY - this.y * height);
};
this.customConvertPoint = window.URL.createObjectURL(
new Blob(
[
'customConvertPoint = {projectX:function(x){return (x - ' +
centerX +
') / ' +
width +
' + 0.5},projectY:function(y){y = 0.5 - ((y - ' +
centerY +
') / ' +
height +
');return y < 0 ? 0 : y > 1 ? 1 : y;},toY:function(y){return (0.5-y)*' +
height +
'+' +
centerY +
';}}'
],
{ type: 'text/javascript' }
)
);
};
function addLayer(layer, map) {
layer.onAdd && layer.onAdd(map);
}
/**
* @function MapExtend.prototype.removeFromMap
* @description 移除事件。
*/
function removeLayer(layer) {
layer.removeFromMap && layer.removeFromMap();
}
/**
* @function MapExtend.prototype.setVisibility
* @description 设置图层可见性，设置图层的隐藏，显示，重绘的相应的可见标记。
* @param {boolean} [visibility] - 是否显示图层（当前地图的 resolution 在最大最小 resolution 之间）。
*/
function setVisibility(layer, visibility) {
layer.setVisibility && layer.setVisibility(visibility);
}
/**
* @function MapExtend.prototype.moveTo
* @description 将图层移动到某个图层之前。
* @param {string} layerID -待插入的图层 ID。
* @param {boolean} [beforeLayerID] - 是否将本图层插入到图层 id 为 layerID 的图层之前(如果为 false 则将本图层插入到图层 id 为 layerID 的图层之后)。
*/
function moveLayer(layerID, beforeLayerID) {
var layer = document.getElementById(layerID);
// var beforeLayer;
if (beforeLayerID) {
var beforeLayer = document.getElementById(beforeLayerID);
if (!beforeLayer) {
mapboxgl.Evented.prototype.fire('error', {
error: new Error(`Layer with id "${beforeLayerID}" does not exist on this document.`)
});
}
}
if (layer && beforeLayer) {
beforeLayer.parentNode.insertBefore(layer, beforeLayer);
} else {
//当没有传入beforeLayerID ，则默认将图层移动到最上面
layer.parentNode.appendChild(layer);
}
}
/**
* 指定图层设置符号
* @param {string} layerId
* @param {string} symbol
*/
mapboxgl.Map.prototype.setSymbol = function (layerId, symbol) {
getSymbolHandler(this).setSymbol(layerId, symbol);
};
/**
* Layer新增symbol属性
*/
if (!(mapboxgl.Map.prototype).setStyleBak) {
(mapboxgl.Map.prototype).setStyleBak = mapboxgl.Map.prototype.setStyle;
mapboxgl.Map.prototype.setStyle = function (style, options) {
this.setStyleBak(style, options);
this.style.once('style.load', () => {
const symbolLayers = style.layers.filter(l => l.symbol);
symbolLayers.forEach((l) => {
this.setSymbol(l.id, l.symbol);
});
});
return this;
}
}
/**
* 加载Web符号
* @param {string} id
* @param {function} callback
* @returns {undefined}
*/
mapboxgl.Map.prototype.loadSymbol = async function (id, callback) {
if (typeof id === 'string') {
let symbolInfo = getSymbolHandler(this).getSymbol(id);
if (!symbolInfo) {
if (!mapboxgl.supermap.WebSymbol.basePath) {
callback({
message: 'SymbolUrl of WebSymbol is null.'
});
return;
}
const symbolResult = await mapboxgl.supermap.WebSymbol.getSymbol?.(id);
if (!symbolResult) {
callback({
message: 'This symbol is not exists.'
});
return;
}
const { value, image } = symbolResult;
symbolInfo = value;
getSymbolHandler(this).addSymbolImageToMap(value, image);
}
callback(null, symbolInfo);
} else {
callback({
message: 'Symbol id must be a string.'
});
}
};
/**
* 添加符号
* @param {string} id
* @param {object} symbol
*/
mapboxgl.Map.prototype.addSymbol = function (id, symbol) {
getSymbolHandler(this).addSymbol(id, symbol);
};
/**
* 判断符号是否存在
* @param {string} id
*/
mapboxgl.Map.prototype.hasSymbol = function (id) {
if (!id) {
this.fire('error', {
error: new Error('Missing required symbol id')
});
return false;
}
return !!getSymbolHandler(this).getSymbol(id);
};
/**
* 删除符号
* @param {string} id
* @param {object} symbol
*/
mapboxgl.Map.prototype.removeSymbol = function (id) {
getSymbolHandler(this).removeSymbol(id);
};
/**
* 获取图层
* @param {string} id
*/
if (mapboxgl.Map.prototype.getLayerBak === undefined) {
mapboxgl.Map.prototype.getLayerBak = mapboxgl.Map.prototype.getLayer;
mapboxgl.Map.prototype.getLayer = function (layerId) {
return getSymbolHandler(this).getLayer(layerId);
};
}
/**
* 删除图层
* @param {string} layerId
*/
if (mapboxgl.Map.prototype.removeLayerBak === undefined) {
mapboxgl.Map.prototype.removeLayerBak = mapboxgl.Map.prototype.removeLayer;
mapboxgl.Map.prototype.removeLayer = function (layerId) {
getSymbolHandler(this).removeLayer(layerId);
};
}
/**
* 获取style
*/
if (mapboxgl.Map.prototype.getStyleBak === undefined) {
mapboxgl.Map.prototype.getStyleBak = mapboxgl.Map.prototype.getStyle;
mapboxgl.Map.prototype.getStyle = function () {
return getSymbolHandler(this).getStyle();
};
}
})();
window.mapboxgl = mapboxgl;