Tweet block - WORK IN PROGESS! Don't merge or review or anything.

blocks/api/categories.js

@@ -9,7 +9,8 @@
  */
 const categories = [
 	{ slug: 'common', title: 'Common Blocks' },
-	{ slug: 'layout', title: 'Layout Blocks' }
+	{ slug: 'layout', title: 'Layout Blocks' },
+	{ slug: 'social', title: 'Social Media' }
 ];
 
 /**

blocks/library/index.js

@@ -8,3 +8,4 @@ import './quote';
 import './separator';
 import './button';
 import './pullquote';
+import './tweet';

blocks/library/tweet/index.js

@@ -0,0 +1,95 @@
+/**
+ * Internal dependencies
+ */
+import { registerBlock, query } from '../../api';
+import Sandbox from '../../../components/sandbox';
+import Button from '../../../components/button';
+import Placeholder from '../../../components/placeholder';
+
+const { prop } = query;
+
+registerBlock( 'core/tweet', {
+	title: wp.i18n.__( 'Tweet' ),
+	icon: 'twitter',
+
+	category: 'social',
+
+	attributes: {
+		url: prop( '*', 'innerHTML' ), // our html is just a div with the url in, for WP's oembed to process
+	},
+
+	edit: class extends wp.element.Component {
+		constructor() {
+			super( ...arguments );
+			this.fetchTweet = this.fetchTweet.bind( this );
+			this.state = {
+				url: this.props.attributes.url,
+				html: '',
+				error: false,
+				fetching: false,
+			};
+			if ( this.state.url ) {
+				this.doFetch( this.state.url, this.props.setAttributes, this.setState.bind( this ) );
+			}
+		}
+		doFetch( url, setAttributes, setState ) {
+			setState( { fetching: true, error: false } );
+			jQuery.ajax( {
+				type: 'GET',
+				dataType: 'jsonp',
+				data: {},
+				timeout: 5000,
+				url: 'https://publish.twitter.com/oembed?url=' + encodeURI( url ),
+				error: function() {
+					setState( { fetching: false, error: true } );
+				},
+				success: function( msg ) {
+					setAttributes( { url: url } );
+					setState( { fetching: false, error: false, html: msg.html } );
+				},
+			} );
+		}
+		fetchTweet() {
+			const { url } = this.state;
+			this.doFetch( url, this.props.setAttributes, this.setState.bind( this ) );
+		}
+		render() {
+			const { html, url, error, fetching } = this.state;
+
+			if ( ! html ) {
+				return (
+					<Placeholder instructions={ wp.i18n.__( 'Please paste the URL of the tweet here!' ) } icon="twitter" label={ wp.i18n.__( 'Tweet' ) } className="blocks-tweet">
+						<div>
+							<input
+								type="text"
+								value={ url }
+								onChange={ ( event ) => this.setState( { url: event.target.value } ) } />
+							{ ! fetching ?
+								(
+									<Button
+										isLarge
+										onClick={ this.fetchTweet }>
+										{ wp.i18n.__( 'Get Tweet' ) }
+									</Button>
+								) : (
+									<span className="spinner is-active" />
+								)
+							}
+						</div>
+						{ error && ( <div>{ wp.i18n.__( 'Sorry, we couldn\'t fetch that tweet.' ) }</div> ) }
+					</Placeholder>
+				);
+			}
+			return (
+				<Sandbox html={ html } />
+			);
+		}
+	},
+
+	save( { attributes } ) {
+		const { url } = attributes;
+		return (
+			<div>{ url }</div>
+		);
+	}
+} );

components/resizable-iframe/README.md

@@ -0,0 +1,46 @@
+Resizable Iframe
+================
+
+Resizable Iframe is a React component for rendering an `<iframe>` element which can dynamically update its own dimensions using [`window.postMessage`](https://developer.mozilla.org/en-US/docs/Web/API/Window.postMessage). This is useful in cases where an inline frame of an unknown size is to be displayed on the page.
+
+## Example
+
+The `ResizableIframe` component can be used in much the same way that you would use an `<iframe>` DOM element. Props are automatically transferred to the rendered `<iframe>`, in case you need to specify additional properties or styles.
+
+```html
+<ResizableIframe src={ myFrameUrl } frameBorder={ 0 } />
+```
+
+## Usage
+
+To allow for resizing of the element, a `ResizableIframe` element listens for `message` events on the `window` object. If the rendered frame is not sandboxed, a script is injected in the frame to manage this behavior on your behalf. If the frame is sandboxed, any page you reference as the `src` URL is responsible for invoking this event using [`window.postMessage`](https://developer.mozilla.org/en-US/docs/Web/API/Window.postMessage). The message should be a JSON string with an `action` value of "resize" and a numeric `width` and `height` to define the new pixel dimensions of the element.
+
+For example, a page can trigger a resize using the following code snippet:
+
+```javascript
+if ( window.parent ) {
+	window.parent.postMessage( JSON.stringify( {
+		action: 'resize',
+		width: document.body.clientWidth,
+		height: document.body.clientHeight
+	} ), '*' );
+}
+```
+
+## Props
+
+### `src`
+
+Treated as the `src` URL to be used in the rendered `<iframe>` DOM element.
+
+### `width`
+
+An optional fixed width value, if you don't want this to be the responsibility of the child window.
+
+### `height`
+
+An optional fixed height value, if you don't want this to be the responsibility of the child window.
+
+### `onResize`
+
+An optional function to trigger when the rendered frame has been resized.

components/resizable-iframe/index.js

@@ -0,0 +1,193 @@
+/**
+ * Imported from Calypso
+ */
+
+/**
+ * External dependencies
+ */
+import React from 'react';
+import debugFactory from 'debug';
+import { omit } from 'lodash';
+import uuid from 'uuid/v4';
+
+/**
+ * Globals
+ */
+const debug = debugFactory( 'gutenburg:resizable-iframe' ),
+	noop = () => {};
+
+export default React.createClass( {
+	displayName: 'ResizableIframe',
+
+	propTypes: {
+		src: React.PropTypes.string,
+		width: React.PropTypes.oneOfType( [
+			React.PropTypes.string,
+			React.PropTypes.number
+		] ),
+		height: React.PropTypes.oneOfType( [
+			React.PropTypes.string,
+			React.PropTypes.number
+		] ),
+		onLoad: React.PropTypes.func,
+		onResize: React.PropTypes.func,
+		title: React.PropTypes.string
+	},
+
+	getInitialState: function() {
+		return { width: 0, height: 0 };
+	},
+
+	getDefaultProps: function() {
+		return {
+			onLoad: noop,
+			onResize: noop,
+			title: uuid()
+		};
+	},
+
+	componentWillMount: function() {
+		debug( 'Mounting ' + this.constructor.displayName + ' React component.' );
+	},
+
+	componentDidMount: function() {
+		window.addEventListener( 'message', this.checkMessageForResize, false );
+		this.maybeConnect();
+	},
+
+	componentDidUpdate: function() {
+		this.maybeConnect();
+	},
+
+	componentWillUnmount: function() {
+		window.removeEventListener( 'message', this.checkMessageForResize );
+	},
+
+	getFrameBody: function() {
+		return this.iframe.contentDocument.body;
+	},
+
+	maybeConnect: function() {
+		if ( ! this.isFrameAccessible() ) {
+			return;
+		}
+
+		const body = this.getFrameBody();
+		if ( null !== body.getAttribute( 'data-resizable-iframe-connected' ) ) {
+			return;
+		}
+
+		const script = document.createElement( 'script' );
+		script.innerHTML = `
+			( function() {
+				var observer;
+
+				if ( ! window.MutationObserver || ! document.body || ! window.top ) {
+					return;
+				}
+
+				function sendResize() {
+					window.top.postMessage( {
+						action: 'resize',
+						width: document.body.offsetWidth,
+						height: document.body.offsetHeight
+					}, '*' );
+				}
+
+				observer = new MutationObserver( sendResize );
+				observer.observe( document.body, {
+					attributes: true,
+					attributeOldValue: false,
+					characterData: true,
+					characterDataOldValue: false,
+					childList: true,
+					subtree: true
+				} );
+
+				window.addEventListener( 'load', sendResize, true );
+
+				// Hack: Remove viewport unit styles, as these are relative
+				// the iframe root and interfere with our mechanism for
+				// determining the unconstrained page bounds.
+				function removeViewportStyles( ruleOrNode ) {
+					[ 'width', 'height', 'minHeight', 'maxHeight' ].forEach( function( style ) {
+						if ( /^\\d+(vmin|vmax|vh|vw)$/.test( ruleOrNode.style[ style ] ) ) {
+							ruleOrNode.style[ style ] = '';
+						}
+					} );
+				}
+
+				Array.prototype.forEach.call( document.querySelectorAll( '[style]' ), removeViewportStyles );
+				Array.prototype.forEach.call( document.styleSheets, function( stylesheet ) {
+					Array.prototype.forEach.call( stylesheet.cssRules || stylesheet.rules, removeViewportStyles );
+				} );
+
+				document.body.style.position = 'absolute';
+				document.body.setAttribute( 'data-resizable-iframe-connected', '' );
+
+				sendResize();
+			} )();
+		`;
+		body.appendChild( script );
+	},
+
+	isFrameAccessible: function() {
+		try {
+			return !! this.getFrameBody();
+		} catch ( e ) {
+			return false;
+		}
+	},
+
+	checkMessageForResize: function( event ) {
+		const iframe = this.iframe;
+
+		// Attempt to parse the message data as JSON if passed as string
+		let data = event.data || {};
+		if ( 'string' === typeof data ) {
+			try {
+				data = JSON.parse( data );
+			} catch ( e ) {} // eslint-disable-line no-empty
+		}
+
+		// Verify that the mounted element is the source of the message
+		if ( ! iframe || iframe.contentWindow !== event.source ) {
+			return;
+		}
+
+		debug( 'Received message: %o', data );
+
+		// Update the state only if the message is formatted as we expect, i.e.
+		// as an object with a 'resize' action, width, and height
+		const { action, width, height } = data;
+		const { width: oldWidth, height: oldHeight } = this.state;
+
+		if ( 'resize' === action && ( oldWidth !== width || oldHeight !== height ) ) {
+			this.setState( { width, height } );
+			this.props.onResize();
+		}
+	},
+
+	onLoad: function( event ) {
+		this.maybeConnect();
+		this.props.onLoad( event );
+	},
+
+	render: function() {
+		const omitProps = [ 'onResize' ];
+		if ( ! this.props.src ) {
+			omitProps.push( 'src' );
+		}
+		return (
+			<iframe
+				ref={ ( node ) => this.iframe = node }
+				title={ this.props.title }
+				seamless="seamless"
+				scrolling="no"
+				{ ...omit( this.props, omitProps ) }
+				onLoad={ this.onLoad }
+				width={ this.props.width || this.state.width }
+				height={ this.props.height || this.state.height } />
+		);
+	}
+} );