react app

react-app/node_modules/react/lib/ReactDOMTextComponent.js

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+/**
+ * Copyright 2013-2015, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ *
+ * @providesModule ReactDOMTextComponent
+ * @typechecks static-only
+ */
+
+'use strict';
+
+var DOMPropertyOperations = require("./DOMPropertyOperations");
+var ReactComponentBrowserEnvironment =
+  require("./ReactComponentBrowserEnvironment");
+var ReactDOMComponent = require("./ReactDOMComponent");
+
+var assign = require("./Object.assign");
+var escapeTextContentForBrowser = require("./escapeTextContentForBrowser");
+
+/**
+ * Text nodes violate a couple assumptions that React makes about components:
+ *
+ *  - When mounting text into the DOM, adjacent text nodes are merged.
+ *  - Text nodes cannot be assigned a React root ID.
+ *
+ * This component is used to wrap strings in elements so that they can undergo
+ * the same reconciliation that is applied to elements.
+ *
+ * TODO: Investigate representing React components in the DOM with text nodes.
+ *
+ * @class ReactDOMTextComponent
+ * @extends ReactComponent
+ * @internal
+ */
+var ReactDOMTextComponent = function(props) {
+  // This constructor and its argument is currently used by mocks.
+};
+
+assign(ReactDOMTextComponent.prototype, {
+
+  /**
+   * @param {ReactText} text
+   * @internal
+   */
+  construct: function(text) {
+    // TODO: This is really a ReactText (ReactNode), not a ReactElement
+    this._currentElement = text;
+    this._stringText = '' + text;
+
+    // Properties
+    this._rootNodeID = null;
+    this._mountIndex = 0;
+  },
+
+  /**
+   * Creates the markup for this text node. This node is not intended to have
+   * any features besides containing text content.
+   *
+   * @param {string} rootID DOM ID of the root node.
+   * @param {ReactReconcileTransaction|ReactServerRenderingTransaction} transaction
+   * @return {string} Markup for this text node.
+   * @internal
+   */
+  mountComponent: function(rootID, transaction, context) {
+    this._rootNodeID = rootID;
+    var escapedText = escapeTextContentForBrowser(this._stringText);
+
+    if (transaction.renderToStaticMarkup) {
+      // Normally we'd wrap this in a `span` for the reasons stated above, but
+      // since this is a situation where React won't take over (static pages),
+      // we can simply return the text as it is.
+      return escapedText;
+    }
+
+    return (
+      '<span ' + DOMPropertyOperations.createMarkupForID(rootID) + '>' +
+        escapedText +
+      '</span>'
+    );
+  },
+
+  /**
+   * Updates this component by updating the text content.
+   *
+   * @param {ReactText} nextText The next text content
+   * @param {ReactReconcileTransaction} transaction
+   * @internal
+   */
+  receiveComponent: function(nextText, transaction) {
+    if (nextText !== this._currentElement) {
+      this._currentElement = nextText;
+      var nextStringText = '' + nextText;
+      if (nextStringText !== this._stringText) {
+        // TODO: Save this as pending props and use performUpdateIfNecessary
+        // and/or updateComponent to do the actual update for consistency with
+        // other component types?
+        this._stringText = nextStringText;
+        ReactDOMComponent.BackendIDOperations.updateTextContentByID(
+          this._rootNodeID,
+          nextStringText
+        );
+      }
+    }
+  },
+
+  unmountComponent: function() {
+    ReactComponentBrowserEnvironment.unmountIDFromEnvironment(this._rootNodeID);
+  }
+
+});
+
+module.exports = ReactDOMTextComponent;