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node_modules/echarts/src/component/toolbox/feature/SaveAsImage.js 3.2 KB
aaac7fed   liuqimichale   add
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  /*
  * 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.
  */
  
  /* global Uint8Array */
  
  import env from 'zrender/src/core/env';
  import lang from '../../../lang';
  import * as featureManager from '../featureManager';
  
  var saveAsImageLang = lang.toolbox.saveAsImage;
  
  function SaveAsImage(model) {
      this.model = model;
  }
  
  SaveAsImage.defaultOption = {
      show: true,
      icon: 'M4.7,22.9L29.3,45.5L54.7,23.4M4.6,43.6L4.6,58L53.8,58L53.8,43.6M29.2,45.1L29.2,0',
      title: saveAsImageLang.title,
      type: 'png',
      // Default use option.backgroundColor
      // backgroundColor: '#fff',
      name: '',
      excludeComponents: ['toolbox'],
      pixelRatio: 1,
      lang: saveAsImageLang.lang.slice()
  };
  
  SaveAsImage.prototype.unusable = !env.canvasSupported;
  
  var proto = SaveAsImage.prototype;
  
  proto.onclick = function (ecModel, api) {
      var model = this.model;
      var title = model.get('name') || ecModel.get('title.0.text') || 'echarts';
      var $a = document.createElement('a');
      var type = model.get('type', true) || 'png';
      $a.download = title + '.' + type;
      $a.target = '_blank';
      var url = api.getConnectedDataURL({
          type: type,
          backgroundColor: model.get('backgroundColor', true)
              || ecModel.get('backgroundColor') || '#fff',
          excludeComponents: model.get('excludeComponents'),
          pixelRatio: model.get('pixelRatio')
      });
      $a.href = url;
      // Chrome and Firefox
      if (typeof MouseEvent === 'function' && !env.browser.ie && !env.browser.edge) {
          var evt = new MouseEvent('click', {
              view: window,
              bubbles: true,
              cancelable: false
          });
          $a.dispatchEvent(evt);
      }
      // IE
      else {
          if (window.navigator.msSaveOrOpenBlob) {
              var bstr = atob(url.split(',')[1]);
              var n = bstr.length;
              var u8arr = new Uint8Array(n);
              while (n--) {
                  u8arr[n] = bstr.charCodeAt(n);
              }
              var blob = new Blob([u8arr]);
              window.navigator.msSaveOrOpenBlob(blob, title + '.' + type);
          }
          else {
              var lang = model.get('lang');
              var html = ''
                  + '<body style="margin:0;">'
                  + '<img src="' + url + '" style="max-width:100%;" title="' + ((lang && lang[0]) || '') + '" />'
                  + '</body>';
              var tab = window.open();
              tab.document.write(html);
          }
      }
  };
  
  featureManager.register(
      'saveAsImage', SaveAsImage
  );
  
  export default SaveAsImage;