333 lines
13 KiB
JavaScript
333 lines
13 KiB
JavaScript
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/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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*/
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/**
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* AUTO-GENERATED FILE. DO NOT MODIFY.
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*/
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/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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*/
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import { parseSVG, makeViewBoxTransform } from 'zrender/lib/tool/parseSVG.js';
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import Group from 'zrender/lib/graphic/Group.js';
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import Rect from 'zrender/lib/graphic/shape/Rect.js';
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import { assert, createHashMap, each } from 'zrender/lib/core/util.js';
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import BoundingRect from 'zrender/lib/core/BoundingRect.js';
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import { parseXML } from 'zrender/lib/tool/parseXML.js';
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import { GeoSVGRegion } from './Region.js';
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/**
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* "region available" means that: enable users to set attribute `name="xxx"` on those tags
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* to make it be a region.
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* 1. region styles and its label styles can be defined in echarts opton:
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* ```js
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* geo: {
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* regions: [{
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* name: 'xxx',
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* itemStyle: { ... },
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* label: { ... }
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* }, {
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* ...
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* },
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* ...]
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* };
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* ```
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* 2. name can be duplicated in different SVG tag. All of the tags with the same name share
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* a region option. For exampel if there are two <path> representing two lung lobes. They have
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* no common parents but both of them need to display label "lung" inside.
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*/
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var REGION_AVAILABLE_SVG_TAG_MAP = createHashMap(['rect', 'circle', 'line', 'ellipse', 'polygon', 'polyline', 'path',
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// <text> <tspan> are also enabled because some SVG might paint text itself,
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// but still need to trigger events or tooltip.
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'text', 'tspan',
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// <g> is also enabled because this case: if multiple tags share one name
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// and need label displayed, every tags will display the name, which is not
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// expected. So we can put them into a <g name="xxx">. Thereby only one label
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// displayed and located based on the bounding rect of the <g>.
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'g']);
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var GeoSVGResource = /** @class */function () {
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function GeoSVGResource(mapName, svg) {
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this.type = 'geoSVG';
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// All used graphics. key: hostKey, value: root
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this._usedGraphicMap = createHashMap();
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// All unused graphics.
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this._freedGraphics = [];
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this._mapName = mapName;
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// Only perform parse to XML object here, which might be time
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// consiming for large SVG.
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// Although convert XML to zrender element is also time consiming,
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// if we do it here, the clone of zrender elements has to be
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// required. So we do it once for each geo instance, util real
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// performance issues call for optimizing it.
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this._parsedXML = parseXML(svg);
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}
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GeoSVGResource.prototype.load = function /* nameMap: NameMap */
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() {
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// In the "load" stage, graphic need to be built to
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// get boundingRect for geo coordinate system.
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var firstGraphic = this._firstGraphic;
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// Create the return data structure only when first graphic created.
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// Because they will be used in geo coordinate system update stage,
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// and `regions` will be mounted at `geo` coordinate system,
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// in which there is no "view" info, so that it should better not to
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// make references to graphic elements.
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if (!firstGraphic) {
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firstGraphic = this._firstGraphic = this._buildGraphic(this._parsedXML);
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this._freedGraphics.push(firstGraphic);
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this._boundingRect = this._firstGraphic.boundingRect.clone();
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// PENDING: `nameMap` will not be supported until some real requirement come.
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// if (nameMap) {
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// named = applyNameMap(named, nameMap);
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// }
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var _a = createRegions(firstGraphic.named),
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regions = _a.regions,
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regionsMap = _a.regionsMap;
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this._regions = regions;
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this._regionsMap = regionsMap;
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}
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return {
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boundingRect: this._boundingRect,
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regions: this._regions,
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regionsMap: this._regionsMap
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};
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};
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GeoSVGResource.prototype._buildGraphic = function (svgXML) {
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var result;
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var rootFromParse;
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try {
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result = svgXML && parseSVG(svgXML, {
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ignoreViewBox: true,
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ignoreRootClip: true
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}) || {};
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rootFromParse = result.root;
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assert(rootFromParse != null);
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} catch (e) {
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throw new Error('Invalid svg format\n' + e.message);
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}
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// Note: we keep the covenant that the root has no transform. So always add an extra root.
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var root = new Group();
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root.add(rootFromParse);
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root.isGeoSVGGraphicRoot = true;
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// [THE_RULE_OF_VIEWPORT_AND_VIEWBOX]
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//
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// Consider: `<svg width="..." height="..." viewBox="...">`
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// - the `width/height` we call it `svgWidth/svgHeight` for short.
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// - `(0, 0, svgWidth, svgHeight)` defines the viewport of the SVG, or say,
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// "viewport boundingRect", or `boundingRect` for short.
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// - `viewBox` defines the transform from the real content ot the viewport.
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// `viewBox` has the same unit as the content of SVG.
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// If `viewBox` exists, a transform is defined, so the unit of `svgWidth/svgHeight` become
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// different from the content of SVG. Otherwise, they are the same.
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//
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// If both `svgWidth/svgHeight/viewBox` are specified in a SVG file, the transform rule will be:
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// 0. `boundingRect` is `(0, 0, svgWidth, svgHeight)`. Set it to Geo['_rect'] (View['_rect']).
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// 1. Make a transform from `viewBox` to `boundingRect`.
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// Note: only support `preserveAspectRatio 'xMidYMid'` here. That is, this transform will preserve
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// the aspect ratio.
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// 2. Make a transform from boundingRect to Geo['_viewRect'] (View['_viewRect'])
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// (`Geo`/`View` will do this job).
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// Note: this transform might not preserve aspect radio, which depending on how users specify
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// viewRect in echarts option (e.g., `geo.left/top/width/height` will not preserve aspect ratio,
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// but `geo.layoutCenter/layoutSize` will preserve aspect ratio).
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//
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// If `svgWidth/svgHeight` not specified, we use `viewBox` as the `boundingRect` to make the SVG
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// layout look good.
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//
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// If neither `svgWidth/svgHeight` nor `viewBox` are not specified, we calculate the boundingRect
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// of the SVG content and use them to make SVG layout look good.
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var svgWidth = result.width;
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var svgHeight = result.height;
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var viewBoxRect = result.viewBoxRect;
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var boundingRect = this._boundingRect;
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if (!boundingRect) {
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var bRectX = void 0;
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var bRectY = void 0;
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var bRectWidth = void 0;
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var bRectHeight = void 0;
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if (svgWidth != null) {
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bRectX = 0;
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bRectWidth = svgWidth;
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} else if (viewBoxRect) {
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bRectX = viewBoxRect.x;
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bRectWidth = viewBoxRect.width;
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}
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if (svgHeight != null) {
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bRectY = 0;
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bRectHeight = svgHeight;
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} else if (viewBoxRect) {
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bRectY = viewBoxRect.y;
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bRectHeight = viewBoxRect.height;
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}
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// If both viewBox and svgWidth/svgHeight not specified,
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// we have to determine how to layout those element to make them look good.
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if (bRectX == null || bRectY == null) {
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var calculatedBoundingRect = rootFromParse.getBoundingRect();
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if (bRectX == null) {
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bRectX = calculatedBoundingRect.x;
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bRectWidth = calculatedBoundingRect.width;
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}
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if (bRectY == null) {
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bRectY = calculatedBoundingRect.y;
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bRectHeight = calculatedBoundingRect.height;
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}
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}
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boundingRect = this._boundingRect = new BoundingRect(bRectX, bRectY, bRectWidth, bRectHeight);
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}
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if (viewBoxRect) {
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var viewBoxTransform = makeViewBoxTransform(viewBoxRect, boundingRect);
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// Only support `preserveAspectRatio 'xMidYMid'`
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rootFromParse.scaleX = rootFromParse.scaleY = viewBoxTransform.scale;
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rootFromParse.x = viewBoxTransform.x;
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rootFromParse.y = viewBoxTransform.y;
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}
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// SVG needs to clip based on `viewBox`. And some SVG files really rely on this feature.
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// They do not strictly confine all of the content inside a display rect, but deliberately
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// use a `viewBox` to define a displayable rect.
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// PENDING:
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// The drawback of the `setClipPath` here is: the region label (genereted by echarts) near the
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// edge might also be clipped, because region labels are put as `textContent` of the SVG path.
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root.setClipPath(new Rect({
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shape: boundingRect.plain()
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}));
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var named = [];
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each(result.named, function (namedItem) {
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if (REGION_AVAILABLE_SVG_TAG_MAP.get(namedItem.svgNodeTagLower) != null) {
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named.push(namedItem);
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setSilent(namedItem.el);
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}
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});
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return {
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root: root,
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boundingRect: boundingRect,
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named: named
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};
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};
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/**
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* Consider:
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* (1) One graphic element can not be shared by different `geoView` running simultaneously.
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* Notice, also need to consider multiple echarts instances share a `mapRecord`.
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* (2) Converting SVG to graphic elements is time consuming.
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* (3) In the current architecture, `load` should be called frequently to get boundingRect,
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* and it is called without view info.
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* So we maintain graphic elements in this module, and enables `view` to use/return these
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* graphics from/to the pool with it's uid.
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*/
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GeoSVGResource.prototype.useGraphic = function (hostKey /* , nameMap: NameMap */) {
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var usedRootMap = this._usedGraphicMap;
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var svgGraphic = usedRootMap.get(hostKey);
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if (svgGraphic) {
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return svgGraphic;
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}
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svgGraphic = this._freedGraphics.pop()
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// use the first boundingRect to avoid duplicated boundingRect calculation.
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usedRootMap.set(hostKey, svgGraphic);
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// PENDING: `nameMap` will not be supported until some real requirement come.
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// `nameMap` can only be obtained from echarts option.
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// The original `named` must not be modified.
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// if (nameMap) {
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// svgGraphic = extend({}, svgGraphic);
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// svgGraphic.named = applyNameMap(svgGraphic.named, nameMap);
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// }
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return svgGraphic;
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};
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GeoSVGResource.prototype.freeGraphic = function (hostKey) {
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var usedRootMap = this._usedGraphicMap;
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var svgGraphic = usedRootMap.get(hostKey);
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if (svgGraphic) {
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usedRootMap.removeKey(hostKey);
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this._freedGraphics.push(svgGraphic);
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}
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};
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return GeoSVGResource;
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}();
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export { GeoSVGResource };
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function setSilent(el) {
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// Only named element has silent: false, other elements should
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// act as background and has no user interaction.
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el.silent = false;
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// text|tspan will be converted to group.
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if (el.isGroup) {
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el.traverse(function (child) {
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child.silent = false;
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});
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}
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}
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function createRegions(named) {
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var regions = [];
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var regionsMap = createHashMap();
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// Create resions only for the first graphic.
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each(named, function (namedItem) {
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// Region has feature to calculate center for tooltip or other features.
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// If there is a <g name="xxx">, the center should be the center of the
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// bounding rect of the g.
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if (namedItem.namedFrom != null) {
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return;
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}
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var region = new GeoSVGRegion(namedItem.name, namedItem.el);
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// PENDING: if `nameMap` supported, this region can not be mounted on
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// `this`, but can only be created each time `load()` called.
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regions.push(region);
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// PENDING: if multiple tag named with the same name, only one will be
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// found by `_regionsMap`. `_regionsMap` is used to find a coordinate
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// by name. We use `region.getCenter()` as the coordinate.
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regionsMap.set(namedItem.name, region);
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});
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return {
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regions: regions,
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regionsMap: regionsMap
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};
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}
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// PENDING: `nameMap` will not be supported until some real requirement come.
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// /**
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// * Use the alias in geoNameMap.
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// * The input `named` must not be modified.
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// */
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// function applyNameMap(
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// named: GeoSVGGraphicRecord['named'],
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// nameMap: NameMap
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// ): GeoSVGGraphicRecord['named'] {
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// const result = [] as GeoSVGGraphicRecord['named'];
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// for (let i = 0; i < named.length; i++) {
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// let regionGraphic = named[i];
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// const name = regionGraphic.name;
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// if (nameMap && nameMap.hasOwnProperty(name)) {
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// regionGraphic = extend({}, regionGraphic);
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// regionGraphic.name = name;
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// }
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// result.push(regionGraphic);
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// }
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// return result;
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// }
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