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/* Copyright© 2000 - 2021 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 L from "leaflet";
import {
CommonUtil,
GeometryPoint as Point,
ServerFeature,
GeoJSON as GeoJSONFormat,
GeometryVector,
GeoText,
LevelRenderer
} from '@supermap/iclient-common';
import {
ThemeFeature
} from './ThemeFeature';
import Attributions from '../../core/Attributions'
/**
* @class L.supermap.ThemeLayer
* @classdesc 专题图层基类，调用建议使用其子类实现类。
* @category Visualization Theme
* @extends {L.Layer}
* @param {string} name - 专题图图层名称。
* @param {Object} options - 可选参数。
* @param {string} [options.id] - 专题图层 ID。默认使用 CommonUtil.createUniqueID("themeLayer_") 创建专题图层 ID。
* @param {number} [options.opacity=1] - 图层透明度。
* @param {boolean} [options.alwaysMapCRS=false] - 要素坐标是否和地图坐标系一致，要素默认是经纬度坐标。
* @param {string} [options.attribution='Map Data <span>© <a href='http://support.supermap.com.cn/product/iServer.aspx' title='SuperMap iServer' target='_blank'>SuperMap iServer</a></span>'] - 版权描述信息。
* @param {Array} [options.TFEvents] - 专题要素事件临时存储。
* @fires L.supermap.ThemeLayer#featuresremoved
*/
export var ThemeLayer = L.Layer.extend({
options: {
//要素坐标是否和地图坐标系一致，默认为false，要素默认是经纬度坐标。
alwaysMapCRS: false,
id: CommonUtil.createUniqueID("themeLayer_"),
opacity: 1,
// {Array} 专题要素事件临时存储，临时保存图层未添加到 map 前用户添加的事件监听，待图层添加到 map 后把这些事件监听添加到图层上，清空此图层。
//这是一个二维数组，组成二维数组的每个一维数组长度为 2，分别是 event, callback。
TFEvents: [],
attribution: Attributions.Common.attribution
},
initialize: function (name, options) {
L.Util.setOptions(this, options);
this.name = name;
this.features = [];
this.TFEvents = this.options.TFEvents;
this.levelRenderer = new LevelRenderer();
this.movingOffset = [0, 0];
},
/**
* @function L.supermap.ThemeLayer.prototype.getEvents
* @description 获取图层事件。
* @returns {Object} 返回图层支持的事件。
*/
getEvents: function () {
var me = this;
var events = {
zoomend: me._reset,
moveend: me._reset,
resize: me._resize
};
if (this._map._zoomAnimated) {
events.zoomanim = me._zoomAnim;
}
return events;
},
/**
* @function L.supermap.ThemeLayer.prototype.onRemove
* @description 删除某个地图。
* @param {L.Map} map - 要删除的地图。
*/
onRemove: function (map) {
var me = this;
L.DomUtil.remove(me.container);
map.off("mousemove", me.mouseMoveHandler);
},
/**
* @function L.supermap.ThemeLayer.prototype.onAdd
* @description 添加专题图。
* @param {L.Map} map - 要添加的地图。
* @private
*/
onAdd: function (map) {
var me = this;
me.map = me._map = map;
me._initContainer();
if (!me.levelRenderer) {
map.removeLayer(me);
return;
}
//初始化渲染器
var size = map.getSize();
me.container.style.width = size.x + "px";
me.container.style.height = size.y + "px";
me._updateOpacity();
me.renderer = me.levelRenderer.init(me.container);
me.renderer.clear();
if (me.features && me.features.length > 0) {
me._reset();
}
//处理用户预先（在图层添加到 map 前）监听的事件
me.addTFEvents();
me.mouseMoveHandler = function (e) {
var xy = e.layerPoint;
me.currentMousePosition = L.point(xy.x + me.movingOffset[0], xy.y + me.movingOffset[1]);
};
map.on("mousemove", me.mouseMoveHandler);
me.update(map.getBounds());
},
/**
* @function L.supermap.ThemeLayer.prototype.addFeatures
* @description 向专题图图层中添加数据。
* @param {(SuperMap.ServerFeature|L.supermap.themeFeature|GeoJSONObject)} features - 待转要素。
*/
addFeatures: function (features) { // eslint-disable-line no-unused-vars
//子类实现此方法
},
/**
* @function L.supermap.ThemeLayer.prototype.redrawThematicFeatures
* @description 抽象方法，可实例化子类必须实现此方法。
* @param {L.bounds} bounds - 重绘专题要素范围。
*/
redrawThematicFeatures: function (bounds) { // eslint-disable-line no-unused-vars
//子类必须实现此方法
},
/**
* @function L.supermap.ThemeLayer.prototype.destroyFeatures
* @description 销毁要素。
* @param {Array.<SuperMap.Feature.Vector>} features - 将被销毁的要素。
*/
destroyFeatures: function (features) {
if (features === undefined) {
features = this.features;
}
if (!features) {
return;
}
this.removeFeatures(features);
for (var i = features.length - 1; i >= 0; i--) {
features[i].destroy();
}
},
/**
* @function L.supermap.ThemeLayer.prototype.removeFeatures
* @description 从专题图中删除 feature。这个函数删除所有传递进来的矢量要素。
* @param {Array.<SuperMap.Feature.Vector>} features - 将被删除的要素。
*/
removeFeatures: function (features) {
var me = this;
if (!features || features.length === 0) {
return;
}
if (features === me.features) {
return me.removeAllFeatures();
}
if (!(L.Util.isArray(features))) {
features = [features];
}
var featuresFailRemoved = [];
for (var i = features.length - 1; i >= 0; i--) {
var feature = features[i];
//如果我们传入的feature在features数组中没有的话，则不进行删除，
//并将其放入未删除的数组中。
var findex = L.Util.indexOf(me.features, feature);
if (findex === -1) {
featuresFailRemoved.push(feature);
continue;
}
me.features.splice(findex, 1);
}
var drawFeatures = [];
for (var hex = 0, len = me.features.length; hex < len; hex++) {
feature = me.features[hex];
drawFeatures.push(feature);
}
me.features = [];
me.addFeatures(drawFeatures);
//绘制专题要素
if (me.renderer) {
if (me._map) {
me.redrawThematicFeatures(me._map.getBounds());
} else {
me.redrawThematicFeatures();
}
}
var succeed = featuresFailRemoved.length == 0;
/**
* @event L.supermap.ThemeLayer#featuresremoved
* @description 删除的要素成功之后触发。
* @property {Array.<SuperMap.Feature.Vector>} features - 事件对象。
* @property {boolean} succeed - 要输是否删除成功，true 为删除成功，false 为删除失败。
*/
me.fire("featuresremoved", {
features: featuresFailRemoved,
succeed: succeed
});
},
/**
* @function L.supermap.ThemeLayer.prototype.removeAllFeatures
* @description 清除当前图层所有的矢量要素。
*/
removeAllFeatures: function () {
var me = this;
if (me.renderer) {
me.renderer.clear();
}
me.features = [];
me.fire("featuresremoved", {
features: [],
succeed: true
});
},
/**
* @function L.supermap.ThemeLayer.prototype.getFeatures
* @description 查看当前图层中的有效数据。
* @returns {Array} 返回图层中的有效数据。
*/
getFeatures: function () {
var me = this;
var len = me.features.length;
var clonedFeatures = new Array(len);
for (var i = 0; i < len; ++i) {
clonedFeatures[i] = me.features[i];
}
return clonedFeatures;
},
/**
* @function L.supermap.ThemeLayer.prototype.getFeatureBy
* @description 在专题图的要素数组 features 里面遍历每一个 feature，当 feature[property] === value 时，返回此 feature（并且只返回第一个）。
* @param {string} property - 要的某个属性名。
* @param {string} value - 对应属性名得值。
*/
getFeatureBy: function (property, value) {
var me = this;
var feature = null;
for (var id in me.features) {
if (me.features[id][property] !== value) {
continue;
}
feature = me.features[id];
break;
}
return feature;
},
/**
* @function L.supermap.ThemeLayer.prototype.getFeatureById
* @description 通过给定一个 ID，返回对应的矢量要素,如果不存在则返回 null。
* @param {number} featureId - 要素 ID。
*/
getFeatureById: function (featureId) {
return this.getFeatureBy('id', featureId);
},
/**
* @function L.supermap.ThemeLayer.prototype.getFeaturesByAttribute
* @description 通过给定一个属性的 key 值和 value 值，返回所有匹配的要素数组。
* @param {string} attrName - key 值。
* @param {string} attrValue - value 值。
* @returns {Array} 返回所有匹配的要素数组。
*/
getFeaturesByAttribute: function (attrName, attrValue) {
var me = this,
feature,
foundFeatures = [];
for (var id in me.features) {
feature = me.features[id];
if (feature && feature.attributes && (feature.attributes[attrName] === attrValue)) {
foundFeatures.push(feature);
}
}
return foundFeatures;
},
/**
* @function L.supermap.ThemeLayer.prototype.update
* @description 更新图层。
* @param {L.bounds} bounds - 图层范围。
*/
update: function (bounds) {
var mapOffset = this._map.containerPointToLayerPoint([0, 0]);
L.DomUtil.setPosition(this.container, mapOffset);
var me = this;
// var bounds = me._map.getBounds();
// var topLeft = me._map.latLngToLayerPoint(bounds.getNorthWest());
// var mapOffset = [parseInt(topLeft.x, 10) || 0, parseInt(topLeft.y, 10) || 0]
// // var offsetLeft = parseInt(me._map.getContainer().style.left, 10);
// // offsetLeft = -Math.round(offsetLeft);
// //var offsetTop = parseInt(me._map.getContainer().style.top, 10);
// //offsetTop = -Math.round(offsetTop);
// me.container.style.left = mapOffset[0] + 'px';
// me.container.style.top = mapOffset[1] + 'px';
//绘制专题要素
if (me.renderer) {
me.redrawThematicFeatures(bounds);
}
if (me.currentMousePosition) {
me.currentMousePosition = L.point(
me.currentMousePosition.x - me.movingOffset[0],
me.currentMousePosition.y - me.movingOffset[1]);
}
me.movingOffset = [0, 0];
me._zoom = me._map.getZoom();
me._center = me._map.getCenter();
},
/**
* @function L.supermap.ThemeLayer.prototype.setOpacity
* @description 设置图层的不透明度,取值 [0-1] 之间。
* @param {number} opacity - 不透明度。
*/
setOpacity: function (opacity) {
var me = this;
if (opacity === me.options.opacity) {
return;
}
if (!isNaN(opacity)) {
me.options.opacity = opacity;
me._updateOpacity();
}
},
/**
* @function L.supermap.ThemeLayer.prototype.redraw
* @description 重绘该图层。
* @returns {boolean} 返回是否重绘成功。
*/
redraw: function () {
var me = this;
if (!me.renderer) {
return false;
}
if (me._map) {
me.redrawThematicFeatures(me._map.getBounds());
} else {
me.redrawThematicFeatures();
}
return true;
},
/**
* @function L.supermap.ThemeLayer.prototype.on
* @description 添加专题要素事件监听。添加专题要素事件监听。
* @param {Event} event - 监听事件。
* @param {Function} callback - 回调函数。
* @param {string} context - 信息。
*/
on: function (event, callback, context) { // eslint-disable-line no-unused-vars
if (this.renderer) {
this.renderer.on(event, callback);
} else {
L.Layer.prototype.on.call(this, event, callback);
}
return this;
},
/**
* @function L.supermap.ThemeLayer.prototype.off
* @description 移除专题要素事件监听。
* @param {Event} event - 监听事件。
* @param {Function} callback - 回调函数。
* @param {string} context - 信息。
*/
off: function (event, callback, context) { // eslint-disable-line no-unused-vars
var me = this;
if (me.renderer) {
me.renderer.un(event, callback);
} else {
L.Layer.prototype.off.call(this, event, callback);
}
return this;
},
fire: function (type, data, propagate) { // eslint-disable-line no-unused-vars
if (this.renderer) {
this.renderer.trigger(type, data);
}
L.Layer.prototype.fire.call(this, type, data, propagate);
return this;
},
/**
* @function L.supermap.ThemeLayer.prototype.addTFEvents
* @description 将图层添加到地图上之前用户要求添加的事件监听添加到图层。
* @private
*/
addTFEvents: function () {
var me = this;
var tfEs = me.TFEvents;
var len = tfEs.length;
for (var i = 0; i < len; i++) {
me.renderer.on(tfEs[i][0], tfEs[i][1]);
}
},
/**
* @function L.supermap.ThemeLayer.prototype.getLocalXY
* @description 地理坐标转为像素坐标。
* @param {Array} coordinate
*/
getLocalXY: function (coordinate) {
if (!this._map) {
return coordinate;
}
var coor = coordinate;
if (L.Util.isArray(coordinate)) {
coor = L.point(coordinate[0], coordinate[1]);
}
if (!(coordinate instanceof L.Point)) {
if (coordinate instanceof Point || coordinate instanceof GeoText) {
coor = L.point(coordinate.x, coordinate.y);
} else {
coor = L.point(coordinate.lon, coordinate.lat);
}
}
var point = this._map.latLngToAccurateContainerPoint(!this.options.alwaysMapCRS ? L.latLng(coor.y, coor.x) : this._map.options.crs.unproject(coor));
return [point.x, point.y];
},
/**
* @function L.supermap.ThemeLayer.prototype.toiClientFeature
* @description 转为 iClient 要素。
* @param {(SuperMap.ServerFeature|L.supermap.themeFeature|GeoJSONObject)} features - 待转要素。
* @returns {Array.<SuperMap.Feature.Vector>} 转换后的 iClient 要素。
*/
toiClientFeature: function (features) {
//若 features 非数组形式 feature 则先做以下处理：
if (!CommonUtil.isArray(features)) {
features = [features];
}
let featuresTemp = [];
for (let i = 0; i < features.length; i++) {
//L.supermap.themeFeature 数据类型
if (features[i] instanceof ThemeFeature) {
featuresTemp.push(features[i].toFeature());
} else if (features[i] instanceof GeometryVector) {
// 若是 GeometryVector 类型直接返回
featuresTemp.push(features[i]);
} else if (["FeatureCollection", "Feature", "Geometry"].indexOf(features[i].type) != -1) {
//GeoJSON 规范数据类型
const format = new GeoJSONFormat();
featuresTemp = featuresTemp.concat(format.read(features[i]));
} else if (features[i].geometry && features[i].geometry.parts) {
//iServer服务器返回数据格式 todo 暂未找到更好的参数判断，暂用 geometry.parts 试用
featuresTemp.push(ServerFeature.fromJson(features[i]).toFeature());
} else {
throw new Error(`features[${i}]'s type is not be supported.`);
}
}
return featuresTemp;
},
/**
* @function L.supermap.ThemeLayer.prototype.toFeature
* @deprecated
* @description 转为 iClient 要素，该方法将被弃用，由 {@link L.supermap.ThemeLayer#toiClientFeature} 代替。
* @param {(SuperMap.ServerFeature|L.supermap.themeFeature|GeoJSONObject)} features - 待转要素。
* @returns {SuperMap.Feature.Vector} 转换后的 iClient 要素。
*/
toFeature: function (features) {
return this.toiClientFeature(features);
},
_initContainer: function () {
var parentContainer = this.getPane();
var animated = this._map.options.zoomAnimation && L.Browser.any3d;
var className = 'themeLayer leaflet-layer leaflet-zoom-' + (animated ? 'animated' : 'hide');
this.container = L.DomUtil.create("div", className, parentContainer);
var originProp = L.DomUtil.testProp(['transformOrigin', 'WebkitTransformOrigin', 'msTransformOrigin']);
this.container.id = this.options.id;
this.container.style[originProp] = '50% 50%';
this.container.style.position = "absolute";
this.container.style.zIndex = 200;
},
_zoomAnim: function (e) {
var scale = this._map.getZoomScale(e.zoom),
offset = this._map._getCenterOffset(e.center)._multiplyBy(-scale).subtract(this._map._getMapPanePos());
if (L.DomUtil.setTransform) {
L.DomUtil.setTransform(this.container, offset, scale);
} else {
this.container.style[L.DomUtil.TRANSFORM] = L.DomUtil.getTranslateString(offset) + ' scale(' + scale + ')';
}
},
_updateOpacity: function () {
var me = this;
CommonUtil.modifyDOMElement(me.container, null, null, null, null, null, null, me.options.opacity);
if (me._map !== null) {
/**
* @event L.supermap.ThemeLayer#changelayer
* @description 图层属性改变之后触发。
* @property {Object} layer - 图层。
* @property {string} property - 图层属性。
*/
me._map.fire("changelayer", {
layer: me,
property: "opacity"
});
}
},
//缩放移动重绘
_reset: function () {
var me = this;
var latLngBounds = me._map.getBounds();
me.update(latLngBounds);
var size = me._map.getSize();
// var bounds = me._map.getBounds();
// var topLeft = me._map.latLngToLayerPoint(bounds.getNorthWest());
// var mapOffset = [parseInt(topLeft.x, 10) || 0, parseInt(topLeft.y, 10) || 0]
// var offsetLeft = parseInt(me._map.getContainer().style.left, 10);
// offsetLeft = -Math.round(offsetLeft);
//var offsetTop = parseInt(me._map.getContainer().style.top, 10);
//offsetTop = -Math.round(offsetTop);
//me.container.style.left = mapOffset[0] + 'px';
//me.container.style.top = mapOffset[1] + 'px';
var mapOffset = this._map.containerPointToLayerPoint([0, 0]);
L.DomUtil.setPosition(this.container, mapOffset);
if (parseFloat(me.container.width) !== parseFloat(size.x)) {
me.container.width = size.x + 'px';
}
if (parseFloat(me.container.height) !== parseFloat(size.y)) {
me.container.height = size.y + 'px';
}
me.redraw();
},
//通知渲染器的尺寸变化
_resize: function () {
var me = this;
var newSize = me._map.getSize();
me.container.style.width = newSize.x + "px";
me.container.style.height = newSize.y + "px";
me.renderer.resize();
}
});