@wordpress/block-library/build-module/image/image-size.js

Block library for the WordPress editor.

import _classCallCheck from "@babel/runtime/helpers/esm/classCallCheck";
import _createClass from "@babel/runtime/helpers/esm/createClass";
import _possibleConstructorReturn from "@babel/runtime/helpers/esm/possibleConstructorReturn";
import _getPrototypeOf from "@babel/runtime/helpers/esm/getPrototypeOf";
import _inherits from "@babel/runtime/helpers/esm/inherits";
import _assertThisInitialized from "@babel/runtime/helpers/esm/assertThisInitialized";
import { createElement } from "@wordpress/element";

/**
 * External dependencies
 */
import { noop } from 'lodash';
/**
 * WordPress dependencies
 */

import { withGlobalEvents } from '@wordpress/compose';
import { Component } from '@wordpress/element';
/**
 * Internal dependencies
 */

import { calculatePreferedImageSize } from './utils';

var ImageSize =
/*#__PURE__*/
function (_Component) {
  _inherits(ImageSize, _Component);

  function ImageSize() {
    var _this;

    _classCallCheck(this, ImageSize);

    _this = _possibleConstructorReturn(this, _getPrototypeOf(ImageSize).apply(this, arguments));
    _this.state = {
      width: undefined,
      height: undefined
    };
    _this.bindContainer = _this.bindContainer.bind(_assertThisInitialized(_assertThisInitialized(_this)));
    _this.calculateSize = _this.calculateSize.bind(_assertThisInitialized(_assertThisInitialized(_this)));
    return _this;
  }

  _createClass(ImageSize, [{
    key: "bindContainer",
    value: function bindContainer(ref) {
      this.container = ref;
    }
  }, {
    key: "componentDidUpdate",
    value: function componentDidUpdate(prevProps) {
      if (this.props.src !== prevProps.src) {
        this.setState({
          width: undefined,
          height: undefined
        });
        this.fetchImageSize();
      }

      if (this.props.dirtynessTrigger !== prevProps.dirtynessTrigger) {
        this.calculateSize();
      }
    }
  }, {
    key: "componentDidMount",
    value: function componentDidMount() {
      this.fetchImageSize();
    }
  }, {
    key: "componentWillUnmount",
    value: function componentWillUnmount() {
      if (this.image) {
        this.image.onload = noop;
      }
    }
  }, {
    key: "fetchImageSize",
    value: function fetchImageSize() {
      this.image = new window.Image();
      this.image.onload = this.calculateSize;
      this.image.src = this.props.src;
    }
  }, {
    key: "calculateSize",
    value: function calculateSize() {
      var _calculatePreferedIma = calculatePreferedImageSize(this.image, this.container),
          width = _calculatePreferedIma.width,
          height = _calculatePreferedIma.height;

      this.setState({
        width: width,
        height: height
      });
    }
  }, {
    key: "render",
    value: function render() {
      var sizes = {
        imageWidth: this.image && this.image.width,
        imageHeight: this.image && this.image.height,
        containerWidth: this.container && this.container.clientWidth,
        containerHeight: this.container && this.container.clientHeight,
        imageWidthWithinContainer: this.state.width,
        imageHeightWithinContainer: this.state.height
      };
      return createElement("div", {
        ref: this.bindContainer
      }, this.props.children(sizes));
    }
  }]);

  return ImageSize;
}(Component);

export default withGlobalEvents({
  resize: 'calculateSize'
})(ImageSize);
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