Editor: Add word count

client/lib/posts/post-edit-store.js

@@ -229,6 +229,7 @@ function setRawContent( content ) {
 		if ( PostEditStore.isDirty() !== isDirty || PostEditStore.hasContent() !== hasContent ) {
 			PostEditStore.emit( 'change' );
 		}
+		PostEditStore.emit( 'rawContentChange' );
 	}
 }
 

client/lib/text-utils/Makefile

@@ -0,0 +1,12 @@
+NODE_BIN := $(shell npm bin)
+MOCHA ?= $(NODE_BIN)/mocha
+BASE_DIR := $(NODE_BIN)/../..
+NODE_PATH := test:$(BASE_DIR)/client:$(BASE_DIR)/shared
+COMPILERS ?= js:babel/register
+REPORTER ?= spec
+UI ?= bdd
+
+test:
+	@NODE_ENV=test NODE_PATH=$(NODE_PATH) $(MOCHA) --compilers $(COMPILERS) --reporter $(REPORTER) --ui $(UI)
+
+.PHONY: test

client/lib/text-utils/index.js

@@ -0,0 +1,27 @@
+function countWords( content ) {
+	// Adapted from TinyMCE wordcount plugin:
+	// https://github.com/tinymce/tinymce/blob/4.2.6/js/tinymce/plugins/wordcount/plugin.js
+
+	if ( content && typeof content === 'string' ) {
+		// convert ellipses to spaces, remove HTML tags, and remove space chars
+		content = content.replace( /\.\.\./g, ' ' );
+		content = content.replace( /<.[^<>]*?>/g, ' ' );
+		content = content.replace( /&nbsp;|&#160;/gi, ' ' );
+
+		// deal with HTML entities
+		content = content.replace( /(\w+)(&#?[a-z0-9]+;)+(\w+)/i, '$1$3' ); // strip entities inside words
+		content = content.replace( /&.+?;/g, ' ' ); // turn all other entities into spaces
+
+		// remove numbers and punctuation
+		content = content.replace( /[0-9.(),;:!?%#$?\x27\x22_+=\\\/\-]*/g, '' );
+
+		const words = content.match( /[\w\u2019\x27\-\u00C0-\u1FFF]+/g );
+		if ( words ) {
+			return words.length;
+		}
+	}
+
+	return 0;
+}
+
+export default { countWords };

client/lib/text-utils/test/index.js

@@ -0,0 +1,64 @@
+/**
+ * External dependencies
+ */
+import { expect } from 'chai';
+
+/**
+ * Internal dependencies
+ */
+import textUtils from '../';
+
+// Adapted from TinyMCE word count tests:
+// https://github.com/tinymce/tinymce/blob/4.2.6/tests/plugins/wordcount.js
+
+describe( 'textUtils', () => {
+	describe( 'wordCount', () => {
+		it( 'should return 0 for blank content', () => {
+			expect( textUtils.countWords(
+				''
+			) ).to.equal( 0 );
+		} );
+
+		it( 'should strip HTML tags and count words for a simple sentence', () => {
+			expect( textUtils.countWords(
+				'<p>My sentence is this.</p>'
+			) ).to.equal( 4 );
+		} );
+
+		it( 'should not count dashes', () => {
+			expect( textUtils.countWords(
+				'<p>Something -- ok</p>'
+			) ).to.equal( 2 );
+		} );
+
+		it( 'should not count asterisks or other non-word characters', () => {
+			expect( textUtils.countWords(
+				'<p>* something\n\u00b7 something else</p>'
+			) ).to.equal( 3 );
+		} );
+
+		it( 'should not count numbers', () => {
+			expect( textUtils.countWords(
+				'<p>Something 123 ok</p>'
+			) ).to.equal( 2 );
+		} );
+
+		it( 'should not count HTML entities', () => {
+			expect( textUtils.countWords(
+				'<p>It&rsquo;s my life &ndash; &#8211; &#x2013; don\'t you forget.</p>'
+			) ).to.equal( 6 );
+		} );
+
+		it( 'should count hyphenated words as one word', () => {
+			expect( textUtils.countWords(
+				'<p>Hello some-word here.</p>'
+			) ).to.equal( 3 );
+		} );
+
+		it( 'should count words between blocks as two words', () => {
+			expect( textUtils.countWords(
+				'<p>Hello</p><p>world</p>'
+			) ).to.equal( 2 );
+		} );
+	} );
+} );

client/post-editor/editor-word-count/index.jsx

@@ -0,0 +1,78 @@
+/**
+ * External dependencies
+ */
+import React from 'react/addons';
+
+/**
+ * Internal dependencies
+ */
+import PostEditStore from 'lib/posts/post-edit-store';
+import userModule from 'lib/user';
+import Count from 'components/count';
+import textUtils from 'lib/text-utils';
+
+/**
+ * Module variables
+ */
+const user = userModule();
+
+export default React.createClass( {
+	displayName: 'EditorWordCount',
+
+	mixins: [ React.addons.PureRenderMixin ],
+
+	getInitialState() {
+		return {
+			rawContent: ''
+		};
+	},
+
+	componentWillMount() {
+		PostEditStore.on( 'rawContentChange', this.onRawContentChange );
+	},
+
+	componentDidMount() {
+		this.onRawContentChange();
+	},
+
+	componentWillUnmount() {
+		PostEditStore.removeListener( 'rawContentChange', this.onRawContentChange );
+	},
+
+	onRawContentChange() {
+		this.setState( {
+			rawContent: PostEditStore.getRawContent()
+		} );
+	},
+
+	render() {
+		const currentUser = user.get();
+		const localeSlug = currentUser && currentUser.localeSlug || 'en';
+
+		switch ( localeSlug ) {
+			case 'ja':
+			case 'th':
+			case 'zh-cn':
+			case 'zh-hk':
+			case 'zh-sg':
+			case 'zh-tw':
+				// TODO these are character-based languages - count characters instead
+				return null;
+
+			case 'ko':
+				// TODO Korean is not supported by our current word count regex
+				return null;
+		}
+
+		return (
+			<div className="editor-word-count">
+				{ this.translate( 'Word Count' ) }
+				<Count count={ this.getCount() } />
+			</div>
+		);
+	},
+
+	getCount() {
+		return textUtils.countWords( this.state.rawContent );
+	}
+} );

client/post-editor/post-editor.jsx

@@ -28,6 +28,7 @@ var actions = require( 'lib/posts/actions' ),
 	SimpleNotice = require( 'notices/simple-notice' ),
 	protectForm = require( 'lib/mixins/protect-form' ),
 	TinyMCE = require( 'components/tinymce' ),
+	EditorWordCount = require( 'post-editor/editor-word-count' ),
 	SegmentedControl = require( 'components/segmented-control' ),
 	SegmentedControlItem = require( 'components/segmented-control/item' ),
 	EditorMobileNavigation = require( 'post-editor/editor-mobile-navigation' ),
@@ -390,6 +391,9 @@ var PostEditor = React.createClass( {
 								onTextEditorChange={ this.onEditorContentChange }
 								onTogglePin={ this.onTogglePin } />
 						</div>
+						<div className="post-editor__word-count-wrapper">
+							<EditorWordCount />
+						</div>
 						{ this.iframePreviewEnabled() ?
 							<EditorPreview
 								showPreview={ this.state.showPreview }

client/post-editor/style.scss

@@ -1,6 +1,7 @@
 .is-section-post .wp-primary {
 	// We don't need the space for a sidebar
 	margin-left: 0;
+	padding-bottom: 0;
 
 	// Lets go full width on smaller screens
 	@include breakpoint( "<660px" ) {
@@ -332,3 +333,23 @@
 		max-height: 400px;
 	}
 }
+
+.post-editor__word-count-wrapper {
+	@include clear-fix;
+	border-top: 1px solid lighten( $gray, 30% );
+	background-color: $white;
+	font-size: 11px;
+	line-height: 18px;
+
+	& .editor-word-count {
+		float: right;
+		color: $gray;
+		text-transform: uppercase;
+		padding: 8px;
+
+		& .count {
+			margin-left: 4px;
+			color: darken( $gray, 10% );
+		}
+	}
+}