Chart.js

/*
* 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.
*/

var _util = require("zrender/lib/core/util");

var each = _util.each;

var Group = require("zrender/lib/container/Group");

var componentUtil = require("../util/component");

var clazzUtil = require("../util/clazz");

var modelUtil = require("../util/model");

var _task = require("../stream/task");

var createTask = _task.createTask;

var createRenderPlanner = require("../chart/helper/createRenderPlanner");

/*
* 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.
*/
var inner = modelUtil.makeInner();
var renderPlanner = createRenderPlanner();

function Chart() {
  /**
   * @type {module:zrender/container/Group}
   * @readOnly
   */
  this.group = new Group();
  /**
   * @type {string}
   * @readOnly
   */

  this.uid = componentUtil.getUID('viewChart');
  this.renderTask = createTask({
    plan: renderTaskPlan,
    reset: renderTaskReset
  });
  this.renderTask.context = {
    view: this
  };
}

Chart.prototype = {
  type: 'chart',

  /**
   * Init the chart.
   * @param  {module:echarts/model/Global} ecModel
   * @param  {module:echarts/ExtensionAPI} api
   */
  init: function (ecModel, api) {},

  /**
   * Render the chart.
   * @param  {module:echarts/model/Series} seriesModel
   * @param  {module:echarts/model/Global} ecModel
   * @param  {module:echarts/ExtensionAPI} api
   * @param  {Object} payload
   */
  render: function (seriesModel, ecModel, api, payload) {},

  /**
   * Highlight series or specified data item.
   * @param  {module:echarts/model/Series} seriesModel
   * @param  {module:echarts/model/Global} ecModel
   * @param  {module:echarts/ExtensionAPI} api
   * @param  {Object} payload
   */
  highlight: function (seriesModel, ecModel, api, payload) {
    toggleHighlight(seriesModel.getData(), payload, 'emphasis');
  },

  /**
   * Downplay series or specified data item.
   * @param  {module:echarts/model/Series} seriesModel
   * @param  {module:echarts/model/Global} ecModel
   * @param  {module:echarts/ExtensionAPI} api
   * @param  {Object} payload
   */
  downplay: function (seriesModel, ecModel, api, payload) {
    toggleHighlight(seriesModel.getData(), payload, 'normal');
  },

  /**
   * Remove self.
   * @param  {module:echarts/model/Global} ecModel
   * @param  {module:echarts/ExtensionAPI} api
   */
  remove: function (ecModel, api) {
    this.group.removeAll();
  },

  /**
   * Dispose self.
   * @param  {module:echarts/model/Global} ecModel
   * @param  {module:echarts/ExtensionAPI} api
   */
  dispose: function () {},

  /**
   * Rendering preparation in progressive mode.
   * @param  {module:echarts/model/Series} seriesModel
   * @param  {module:echarts/model/Global} ecModel
   * @param  {module:echarts/ExtensionAPI} api
   * @param  {Object} payload
   */
  incrementalPrepareRender: null,

  /**
   * Render in progressive mode.
   * @param  {Object} params See taskParams in `stream/task.js`
   * @param  {module:echarts/model/Series} seriesModel
   * @param  {module:echarts/model/Global} ecModel
   * @param  {module:echarts/ExtensionAPI} api
   * @param  {Object} payload
   */
  incrementalRender: null,

  /**
   * Update transform directly.
   * @param  {module:echarts/model/Series} seriesModel
   * @param  {module:echarts/model/Global} ecModel
   * @param  {module:echarts/ExtensionAPI} api
   * @param  {Object} payload
   * @return {Object} {update: true}
   */
  updateTransform: null,

  /**
   * The view contains the given point.
   * @interface
   * @param {Array.<number>} point
   * @return {boolean}
   */
  // containPoint: function () {}

  /**
   * @param {string} eventType
   * @param {Object} query
   * @param {module:zrender/Element} targetEl
   * @param {Object} packedEvent
   * @return {boolen} Pass only when return `true`.
   */
  filterForExposedEvent: null
};
var chartProto = Chart.prototype;

chartProto.updateView = chartProto.updateLayout = chartProto.updateVisual = function (seriesModel, ecModel, api, payload) {
  this.render(seriesModel, ecModel, api, payload);
};
/**
 * Set state of single element
 * @param  {module:zrender/Element} el
 * @param  {string} state
 */


function elSetState(el, state) {
  if (el) {
    el.trigger(state);

    if (el.type === 'group') {
      for (var i = 0; i < el.childCount(); i++) {
        elSetState(el.childAt(i), state);
      }
    }
  }
}
/**
 * @param  {module:echarts/data/List} data
 * @param  {Object} payload
 * @param  {string} state 'normal'|'emphasis'
 */


function toggleHighlight(data, payload, state) {
  var dataIndex = modelUtil.queryDataIndex(data, payload);

  if (dataIndex != null) {
    each(modelUtil.normalizeToArray(dataIndex), function (dataIdx) {
      elSetState(data.getItemGraphicEl(dataIdx), state);
    });
  } else {
    data.eachItemGraphicEl(function (el) {
      elSetState(el, state);
    });
  }
} // Enable Chart.extend.


clazzUtil.enableClassExtend(Chart, ['dispose']); // Add capability of registerClass, getClass, hasClass, registerSubTypeDefaulter and so on.

clazzUtil.enableClassManagement(Chart, {
  registerWhenExtend: true
});

Chart.markUpdateMethod = function (payload, methodName) {
  inner(payload).updateMethod = methodName;
};

function renderTaskPlan(context) {
  return renderPlanner(context.model);
}

function renderTaskReset(context) {
  var seriesModel = context.model;
  var ecModel = context.ecModel;
  var api = context.api;
  var payload = context.payload; // ???! remove updateView updateVisual

  var progressiveRender = seriesModel.pipelineContext.progressiveRender;
  var view = context.view;
  var updateMethod = payload && inner(payload).updateMethod;
  var methodName = progressiveRender ? 'incrementalPrepareRender' : updateMethod && view[updateMethod] ? updateMethod // `appendData` is also supported when data amount
  // is less than progressive threshold.
  : 'render';

  if (methodName !== 'render') {
    view[methodName](seriesModel, ecModel, api, payload);
  }

  return progressMethodMap[methodName];
}

var progressMethodMap = {
  incrementalPrepareRender: {
    progress: function (params, context) {
      context.view.incrementalRender(params, context.model, context.ecModel, context.api, context.payload);
    }
  },
  render: {
    // Put view.render in `progress` to support appendData. But in this case
    // view.render should not be called in reset, otherwise it will be called
    // twise. Use `forceFirstProgress` to make sure that view.render is called
    // in any cases.
    forceFirstProgress: true,
    progress: function (params, context) {
      context.view.render(context.model, context.ecModel, context.api, context.payload);
    }
  }
};
var _default = Chart;
module.exports = _default;