likaiguo
/
fangliao-houtai


			
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							"use strict";

var _preact = require("preact");

function _classPrivateFieldLooseBase(receiver, privateKey) { if (!Object.prototype.hasOwnProperty.call(receiver, privateKey)) { throw new TypeError("attempted to use private field on non-instance"); } return receiver; }

var id = 0;

function _classPrivateFieldLooseKey(name) { return "__private_" + id++ + "_" + name; }

const findDOMElement = require("@uppy/utils/lib/findDOMElement");

const getTextDirection = require("@uppy/utils/lib/getTextDirection");

const BasePlugin = require("./BasePlugin.js");
/**
 * Defer a frequent call to the microtask queue.
 *
 * @param {() => T} fn
 * @returns {Promise<T>}
 */


function debounce(fn) {
  let calling = null;
  let latestArgs = null;
  return function () {
    for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {
      args[_key] = arguments[_key];
    }

    latestArgs = args;

    if (!calling) {
      calling = Promise.resolve().then(() => {
        calling = null; // At this point `args` may be different from the most
        // recent state, if multiple calls happened since this task
        // was queued. So we use the `latestArgs`, which definitely
        // is the most recent call.

        return fn(...latestArgs);
      });
    }

    return calling;
  };
}
/**
 * UIPlugin is the extended version of BasePlugin to incorporate rendering with Preact.
 * Use this for plugins that need a user interface.
 *
 * For plugins without an user interface, see BasePlugin.
 */


var _updateUI = /*#__PURE__*/_classPrivateFieldLooseKey("updateUI");

class UIPlugin extends BasePlugin {
  constructor() {
    super(...arguments);
    Object.defineProperty(this, _updateUI, {
      writable: true,
      value: void 0
    });
  }

  /**
   * Check if supplied `target` is a DOM element or an `object`.
   * If it’s an object — target is a plugin, and we search `plugins`
   * for a plugin with same name and return its target.
   */
  mount(target, plugin) {
    const callerPluginName = plugin.id;
    const targetElement = findDOMElement(target);

    if (targetElement) {
      this.isTargetDOMEl = true; // When target is <body> with a single <div> element,
      // Preact thinks it’s the Uppy root element in there when doing a diff,
      // and destroys it. So we are creating a fragment (could be empty div)

      const uppyRootElement = document.createElement('div');
      uppyRootElement.classList.add('uppy-Root'); // API for plugins that require a synchronous rerender.

      _classPrivateFieldLooseBase(this, _updateUI)[_updateUI] = debounce(state => {
        // plugin could be removed, but this.rerender is debounced below,
        // so it could still be called even after uppy.removePlugin or uppy.close
        // hence the check
        if (!this.uppy.getPlugin(this.id)) return;
        (0, _preact.render)(this.render(state), uppyRootElement);
        this.afterUpdate();
      });
      this.uppy.log(`Installing ${callerPluginName} to a DOM element '${target}'`);

      if (this.opts.replaceTargetContent) {
        // Doing render(h(null), targetElement), which should have been
        // a better way, since because the component might need to do additional cleanup when it is removed,
        // stopped working — Preact just adds null into target, not replacing
        targetElement.innerHTML = '';
      }

      (0, _preact.render)(this.render(this.uppy.getState()), uppyRootElement);
      this.el = uppyRootElement;
      targetElement.appendChild(uppyRootElement); // Set the text direction if the page has not defined one.

      uppyRootElement.dir = this.opts.direction || getTextDirection(uppyRootElement) || 'ltr';
      this.onMount();
      return this.el;
    }

    let targetPlugin;

    if (typeof target === 'object' && target instanceof UIPlugin) {
      // Targeting a plugin *instance*
      targetPlugin = target;
    } else if (typeof target === 'function') {
      // Targeting a plugin type
      const Target = target; // Find the target plugin instance.

      this.uppy.iteratePlugins(p => {
        if (p instanceof Target) {
          targetPlugin = p;
        }
      });
    }

    if (targetPlugin) {
      this.uppy.log(`Installing ${callerPluginName} to ${targetPlugin.id}`);
      this.parent = targetPlugin;
      this.el = targetPlugin.addTarget(plugin);
      this.onMount();
      return this.el;
    }

    this.uppy.log(`Not installing ${callerPluginName}`);
    let message = `Invalid target option given to ${callerPluginName}.`;

    if (typeof target === 'function') {
      message += ' The given target is not a Plugin class. ' + 'Please check that you\'re not specifying a React Component instead of a plugin. ' + 'If you are using @uppy/* packages directly, make sure you have only 1 version of @uppy/core installed: ' + 'run `npm ls @uppy/core` on the command line and verify that all the versions match and are deduped correctly.';
    } else {
      message += 'If you meant to target an HTML element, please make sure that the element exists. ' + 'Check that the <script> tag initializing Uppy is right before the closing </body> tag at the end of the page. ' + '(see https://github.com/transloadit/uppy/issues/1042)\n\n' + 'If you meant to target a plugin, please confirm that your `import` statements or `require` calls are correct.';
    }

    throw new Error(message);
  }

  update(state) {
    if (this.el != null) {
      var _classPrivateFieldLoo, _classPrivateFieldLoo2;

      (_classPrivateFieldLoo = (_classPrivateFieldLoo2 = _classPrivateFieldLooseBase(this, _updateUI))[_updateUI]) == null ? void 0 : _classPrivateFieldLoo.call(_classPrivateFieldLoo2, state);
    }
  }

  unmount() {
    if (this.isTargetDOMEl) {
      var _this$el;

      (_this$el = this.el) == null ? void 0 : _this$el.remove();
    }

    this.onUnmount();
  } // eslint-disable-next-line class-methods-use-this


  onMount() {} // eslint-disable-next-line class-methods-use-this


  onUnmount() {}

}

module.exports = UIPlugin;