extension-src/bmap/BMapModel.ts

/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements.  See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership.  The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License.  You may obtain a copy of the License at
*
*   http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied.  See the License for the
* specific language governing permissions and limitations
* under the License.
*/

import {
    ComponentModel,
    extendComponentModel,
} from 'echarts';
import type {
    BMapCoordSys,
    bmapLib,
} from './BMapCoordSys';


export interface BMapOption {
    type?: string;
    center?: number[];
    zoom?: number;
    roam?: boolean | 'scale' | 'move';
    mapOptions?: bmapLib.MapOptions;
    mapStyle?: bmapLib.MapStyle;
    mapStyleV2?: bmapLib.MapStyleV2;
}
type BMapComponentExtended = ComponentModel<BMapOption>;
export type BMapModel = (typeof proto) & BMapComponentExtended;


function v2Equal(a: number[], b: number[]): boolean {
    return a && b && a[0] === b[0] && a[1] === b[1];
}

export const COMPONENT_MAIN_TYPE_BMAP = 'bmap';


const proto = {

    type: COMPONENT_MAIN_TYPE_BMAP,

    __bmap: undefined as bmapLib.Map,
    __mapOffset: undefined as number[],
    __mapStyle: undefined as object,
    __mapStyle2: undefined as object,
    coordinateSystem: undefined as BMapCoordSys,

    getBMap: function () {
        // __bmap is injected when creating BMapCoordSys
        return this.__bmap;
    },

    setCenterAndZoom: function (this: BMapComponentExtended, center: number[], zoom: number): void {
        this.option.center = center;
        this.option.zoom = zoom;
    },

    centerOrZoomChanged: function (this: BMapComponentExtended, center: number[], zoom: number): boolean {
        const option = this.option;
        return !(v2Equal(center, option.center) && zoom === option.zoom);
    },

    defaultOption: {

        center: [104.114129, 37.550339],

        zoom: 5,

        // 2.0 https://lbsyun.baidu.com/custom/index.htm
        mapStyle: {},

        // 3.0 https://lbsyun.baidu.com/index.php?title=open/custom
        mapStyleV2: {},

        // See https://lbsyun.baidu.com/cms/jsapi/reference/jsapi_reference.html#a0b1
        mapOptions: {},

        roam: false
    }
};

extendComponentModel(proto);