Merge pull request #1220 from florianorben/PLT-395

PLT-395: Add syntax highlighting to Markdown code blocks

14 files changed, 231 insertions, 2 deletions

diff --git a/web/react/components/user_settings/code_theme_chooser.jsx b/web/react/components/user_settings/code_theme_chooser.jsx
new file mode 100644
index 000000000..eef4b24ba
--- /dev/null
+++ b/web/react/components/user_settings/code_theme_chooser.jsx
@@ -0,0 +1,55 @@
+// Copyright (c) 2015 Mattermost, Inc. All Rights Reserved.
+// See License.txt for license information.
+
+var Constants = require('../../utils/constants.jsx');
+
+export default class CodeThemeChooser extends React.Component {
+    constructor(props) {
+        super(props);
+        this.state = {};
+    }
+    render() {
+        const theme = this.props.theme;
+
+        const premadeThemes = [];
+        for (const k in Constants.CODE_THEMES) {
+            if (Constants.CODE_THEMES.hasOwnProperty(k)) {
+                let activeClass = '';
+                if (k === theme.codeTheme) {
+                    activeClass = 'active';
+                }
+
+                premadeThemes.push(
+                    <div
+                        className='col-xs-6 col-sm-3 premade-themes'
+                        key={'premade-theme-key' + k}
+                    >
+                        <div
+                            className={activeClass}
+                            onClick={() => this.props.updateTheme(k)}
+                        >
+                            <label>
+                                <img
+                                    className='img-responsive'
+                                    src={'/static/images/themes/code_themes/' + k + '.png'}
+                                />
+                                <div className='theme-label'>{Constants.CODE_THEMES[k]}</div>
+                            </label>
+                        </div>
+                    </div>
+                );
+            }
+        }
+
+        return (
+            <div className='row'>
+                {premadeThemes}
+            </div>
+        );
+    }
+}
+
+CodeThemeChooser.propTypes = {
+    theme: React.PropTypes.object.isRequired,
+    updateTheme: React.PropTypes.func.isRequired
+};
diff --git a/web/react/components/user_settings/custom_theme_chooser.jsx b/web/react/components/user_settings/custom_theme_chooser.jsx
index 44b3f4544..095e5b622 100644
--- a/web/react/components/user_settings/custom_theme_chooser.jsx
+++ b/web/react/components/user_settings/custom_theme_chooser.jsx
@@ -40,11 +40,12 @@ export default class CustomThemeChooser extends React.Component {
         const theme = {type: 'custom'};
         let index = 0;
         Constants.THEME_ELEMENTS.forEach((element) => {
-            if (index < colors.length) {
+            if (index < colors.length - 1) {
                 theme[element.id] = colors[index];
             }
             index++;
         });
+        theme.codeTheme = colors[colors.length - 1];
 
         this.props.updateTheme(theme);
     }
@@ -78,6 +79,8 @@ export default class CustomThemeChooser extends React.Component {
             colors += theme[element.id] + ',';
         });
 
+        colors += theme.codeTheme;
+
         const pasteBox = (
             <div className='col-sm-12'>
                 <label className='custom-label'>
diff --git a/web/react/components/user_settings/user_settings_appearance.jsx b/web/react/components/user_settings/user_settings_appearance.jsx
index 8c62a189d..7b4b54e27 100644
--- a/web/react/components/user_settings/user_settings_appearance.jsx
+++ b/web/react/components/user_settings/user_settings_appearance.jsx
@@ -7,6 +7,7 @@ var Utils = require('../../utils/utils.jsx');
 
 const CustomThemeChooser = require('./custom_theme_chooser.jsx');
 const PremadeThemeChooser = require('./premade_theme_chooser.jsx');
+const CodeThemeChooser = require('./code_theme_chooser.jsx');
 const AppDispatcher = require('../../dispatcher/app_dispatcher.jsx');
 const Constants = require('../../utils/constants.jsx');
 const ActionTypes = Constants.ActionTypes;
@@ -18,12 +19,14 @@ export default class UserSettingsAppearance extends React.Component {
         this.onChange = this.onChange.bind(this);
         this.submitTheme = this.submitTheme.bind(this);
         this.updateTheme = this.updateTheme.bind(this);
+        this.updateCodeTheme = this.updateCodeTheme.bind(this);
         this.handleClose = this.handleClose.bind(this);
         this.handleImportModal = this.handleImportModal.bind(this);
 
         this.state = this.getStateFromStores();
 
         this.originalTheme = this.state.theme;
+        this.originalCodeTheme = this.state.theme.codeTheme;
     }
     componentDidMount() {
         UserStore.addChangeListener(this.onChange);
@@ -58,6 +61,10 @@ export default class UserSettingsAppearance extends React.Component {
             type = 'custom';
         }
 
+        if (!theme.codeTheme) {
+            theme.codeTheme = Constants.DEFAULT_CODE_THEME;
+        }
+
         return {theme, type};
     }
     onChange() {
@@ -93,6 +100,15 @@ export default class UserSettingsAppearance extends React.Component {
         );
     }
     updateTheme(theme) {
+        if (!theme.codeTheme) {
+            theme.codeTheme = this.state.theme.codeTheme;
+        }
+        this.setState({theme});
+        Utils.applyTheme(theme);
+    }
+    updateCodeTheme(codeTheme) {
+        var theme = this.state.theme;
+        theme.codeTheme = codeTheme;
         this.setState({theme});
         Utils.applyTheme(theme);
     }
@@ -102,6 +118,7 @@ export default class UserSettingsAppearance extends React.Component {
     handleClose() {
         const state = this.getStateFromStores();
         state.serverError = null;
+        state.theme.codeTheme = this.originalCodeTheme;
 
         Utils.applyTheme(state.theme);
 
@@ -170,7 +187,13 @@ export default class UserSettingsAppearance extends React.Component {
                     </div>
                     {custom}
                     <hr />
-                                {serverError}
+                    <strong className='radio'>{'Code Theme'}</strong>
+                    <CodeThemeChooser
+                        theme={this.state.theme}
+                        updateTheme={this.updateCodeTheme}
+                    />
+                    <hr />
+                    {serverError}
                     <a
                         className='btn btn-sm btn-primary'
                         href='#'
diff --git a/web/react/package.json b/web/react/package.json
index e6a662375..9af6f5880 100644
--- a/web/react/package.json
+++ b/web/react/package.json
@@ -6,6 +6,7 @@
     "autolinker": "0.18.1",
     "babel-runtime": "5.8.24",
     "flux": "2.1.1",
+    "highlight.js": "^8.9.1",
     "keymirror": "0.1.1",
     "marked": "0.3.5",
     "object-assign": "3.0.0",
diff --git a/web/react/utils/constants.jsx b/web/react/utils/constants.jsx
index 43d81d322..1593f6706 100644
--- a/web/react/utils/constants.jsx
+++ b/web/react/utils/constants.jsx
@@ -304,6 +304,13 @@ module.exports = {
             uiName: 'Mention Highlight Link'
         }
     ],
+    CODE_THEMES: {
+        github: 'GitHub',
+        solarized_light: 'Solarized light',
+        monokai: 'Monokai',
+        solarized_dark: 'Solarized Dark'
+    },
+    DEFAULT_CODE_THEME: 'github',
     Preferences: {
         CATEGORY_DIRECT_CHANNEL_SHOW: 'direct_channel_show',
         CATEGORY_DISPLAY_SETTINGS: 'display_settings',
@@ -318,5 +325,30 @@ module.exports = {
         ENTER: 13,
         ESCAPE: 27,
         SPACE: 32
+    },
+    HighlightedLanguages: {
+        diff: 'Diff',
+        apache: 'Apache',
+        makefile: 'Makefile',
+        http: 'HTTP',
+        json: 'JSON',
+        markdown: 'Markdown',
+        javascript: 'JavaScript',
+        css: 'CSS',
+        nginx: 'nginx',
+        objectivec: 'Objective-C',
+        python: 'Python',
+        xml: 'XML',
+        perl: 'Perl',
+        bash: 'Bash',
+        php: 'PHP',
+        coffeescript: 'CoffeeScript',
+        cs: 'C#',
+        cpp: 'C++',
+        sql: 'SQL',
+        go: 'Go',
+        ruby: 'Ruby',
+        java: 'Java',
+        ini: 'ini'
     }
 };
diff --git a/web/react/utils/markdown.jsx b/web/react/utils/markdown.jsx
index e34f3d00a..179416ea0 100644
--- a/web/react/utils/markdown.jsx
+++ b/web/react/utils/markdown.jsx
@@ -6,6 +6,34 @@ const Utils = require('./utils.jsx');
 
 const marked = require('marked');
 
+const highlightJs = require('highlight.js/lib/highlight.js');
+const highlightJsDiff = require('highlight.js/lib/languages/diff.js');
+const highlightJsApache = require('highlight.js/lib/languages/apache.js');
+const highlightJsMakefile = require('highlight.js/lib/languages/makefile.js');
+const highlightJsHttp = require('highlight.js/lib/languages/http.js');
+const highlightJsJson = require('highlight.js/lib/languages/json.js');
+const highlightJsMarkdown = require('highlight.js/lib/languages/markdown.js');
+const highlightJsJavascript = require('highlight.js/lib/languages/javascript.js');
+const highlightJsCss = require('highlight.js/lib/languages/css.js');
+const highlightJsNginx = require('highlight.js/lib/languages/nginx.js');
+const highlightJsObjectivec = require('highlight.js/lib/languages/objectivec.js');
+const highlightJsPython = require('highlight.js/lib/languages/python.js');
+const highlightJsXml = require('highlight.js/lib/languages/xml.js');
+const highlightJsPerl = require('highlight.js/lib/languages/perl.js');
+const highlightJsBash = require('highlight.js/lib/languages/bash.js');
+const highlightJsPhp = require('highlight.js/lib/languages/php.js');
+const highlightJsCoffeescript = require('highlight.js/lib/languages/coffeescript.js');
+const highlightJsCs = require('highlight.js/lib/languages/cs.js');
+const highlightJsCpp = require('highlight.js/lib/languages/cpp.js');
+const highlightJsSql = require('highlight.js/lib/languages/sql.js');
+const highlightJsGo = require('highlight.js/lib/languages/go.js');
+const highlightJsRuby = require('highlight.js/lib/languages/ruby.js');
+const highlightJsJava = require('highlight.js/lib/languages/java.js');
+const highlightJsIni = require('highlight.js/lib/languages/ini.js');
+
+const Constants = require('../utils/constants.jsx');
+const HighlightedLanguages = Constants.HighlightedLanguages;
+
 class MattermostInlineLexer extends marked.InlineLexer {
     constructor(links, options) {
         super(links, options);
@@ -51,6 +79,49 @@ class MattermostMarkdownRenderer extends marked.Renderer {
         this.text = this.text.bind(this);
 
         this.formattingOptions = formattingOptions;
+
+        highlightJs.registerLanguage('diff', highlightJsDiff);
+        highlightJs.registerLanguage('apache', highlightJsApache);
+        highlightJs.registerLanguage('makefile', highlightJsMakefile);
+        highlightJs.registerLanguage('http', highlightJsHttp);
+        highlightJs.registerLanguage('json', highlightJsJson);
+        highlightJs.registerLanguage('markdown', highlightJsMarkdown);
+        highlightJs.registerLanguage('javascript', highlightJsJavascript);
+        highlightJs.registerLanguage('css', highlightJsCss);
+        highlightJs.registerLanguage('nginx', highlightJsNginx);
+        highlightJs.registerLanguage('objectivec', highlightJsObjectivec);
+        highlightJs.registerLanguage('python', highlightJsPython);
+        highlightJs.registerLanguage('xml', highlightJsXml);
+        highlightJs.registerLanguage('perl', highlightJsPerl);
+        highlightJs.registerLanguage('bash', highlightJsBash);
+        highlightJs.registerLanguage('php', highlightJsPhp);
+        highlightJs.registerLanguage('coffeescript', highlightJsCoffeescript);
+        highlightJs.registerLanguage('cs', highlightJsCs);
+        highlightJs.registerLanguage('cpp', highlightJsCpp);
+        highlightJs.registerLanguage('sql', highlightJsSql);
+        highlightJs.registerLanguage('go', highlightJsGo);
+        highlightJs.registerLanguage('ruby', highlightJsRuby);
+        highlightJs.registerLanguage('java', highlightJsJava);
+        highlightJs.registerLanguage('ini', highlightJsIni);
+    }
+
+    code(code, language) {
+        let usedLanguage = language;
+
+        if (String(usedLanguage).toLocaleLowerCase() === 'html') {
+            usedLanguage = 'xml';
+        }
+
+        if (!usedLanguage || highlightJs.listLanguages().indexOf(usedLanguage) < 0) {
+            let parsed = super.code(code, usedLanguage);
+            return '<div class="post-body--code"><code class="hljs">' + TextFormatting.sanitizeHtml($(parsed).text()) + '</code></div>';
+        }
+
+        let parsed = highlightJs.highlight(usedLanguage, code);
+        return '<div class="post-body--code">' +
+            '<span class="post-body--code__language">' + HighlightedLanguages[usedLanguage] + '</span>' +
+            '<code class="hljs">' + parsed.value + '</code>' +
+            '</div>';
     }
 
     br() {
diff --git a/web/react/utils/utils.jsx b/web/react/utils/utils.jsx
index 35ce49ae2..c7c8549b9 100644
--- a/web/react/utils/utils.jsx
+++ b/web/react/utils/utils.jsx
@@ -424,6 +424,11 @@ export function toTitleCase(str) {
 }
 
 export function applyTheme(theme) {
+    if (!theme.codeTheme) {
+        theme.codeTheme = Constants.DEFAULT_CODE_THEME;
+    }
+    updateCodeTheme(theme.codeTheme);
+
     if (theme.sidebarBg) {
         changeCss('.sidebar--left, .settings-modal .settings-table .settings-links, .sidebar--menu', 'background:' + theme.sidebarBg, 1);
     }
@@ -612,6 +617,27 @@ export function rgb2hex(rgbIn) {
     return '#' + hex(rgb[1]) + hex(rgb[2]) + hex(rgb[3]);
 }
 
+export function updateCodeTheme(theme) {
+    const path = '/static/css/highlight/' + theme + '.css';
+    const $link = $('link.code_theme');
+    if (path !== $link.attr('href')) {
+        changeCss('code.hljs', 'visibility: hidden');
+        var xmlHTTP = new XMLHttpRequest();
+        xmlHTTP.open('GET', path, true);
+        xmlHTTP.onload = function onLoad() {
+            $link.attr('href', path);
+            if (isBrowserFirefox()) {
+                $link.one('load', () => {
+                    changeCss('code.hljs', 'visibility: visible');
+                });
+            } else {
+                changeCss('code.hljs', 'visibility: visible');
+            }
+        };
+        xmlHTTP.send();
+    }
+}
+
 export function placeCaretAtEnd(el) {
     el.focus();
     if (typeof window.getSelection != 'undefined' && typeof document.createRange != 'undefined') {
diff --git a/web/sass-files/sass/partials/_post.scss b/web/sass-files/sass/partials/_post.scss
index 11816efd9..7709e17f3 100644
--- a/web/sass-files/sass/partials/_post.scss
+++ b/web/sass-files/sass/partials/_post.scss
@@ -473,6 +473,22 @@ body.ios {
 			white-space: nowrap;
 			cursor: pointer;
 		}
+		.post-body--code {
+			font-size: .97em;
+			position:relative;
+			.post-body--code__language {
+				position: absolute;
+				right: 0;
+				background: #fff;
+				cursor: default;
+				padding: 0.3em 0.5em 0.1em;
+				border-bottom-left-radius: 4px;
+				@include opacity(.3);
+			}
+			code {
+				white-space: pre;
+			}
+		}
 	}
 	.create-reply-form-wrap {
 		width: 100%;
diff --git a/web/static/css/highlight b/web/static/css/highlight
new file mode 120000
index 000000000..c774cf397
--- /dev/null
+++ b/web/static/css/highlight
@@ -0,0 +1 @@
+../../react/node_modules/highlight.js/styles/
\ No newline at end of file
diff --git a/web/static/images/themes/code_themes/github.png b/web/static/images/themes/code_themes/github.png
new file mode 100644
index 000000000..d0538d6c0
--- /dev/null
+++ b/web/static/images/themes/code_themes/github.png
diff --git a/web/static/images/themes/code_themes/monokai.png b/web/static/images/themes/code_themes/monokai.png
new file mode 100644
index 000000000..8f92d2a18
--- /dev/null
+++ b/web/static/images/themes/code_themes/monokai.png
diff --git a/web/static/images/themes/code_themes/solarized_dark.png b/web/static/images/themes/code_themes/solarized_dark.png
new file mode 100644
index 000000000..76055c678
--- /dev/null
+++ b/web/static/images/themes/code_themes/solarized_dark.png
diff --git a/web/static/images/themes/code_themes/solarized_light.png b/web/static/images/themes/code_themes/solarized_light.png
new file mode 100644
index 000000000..b9595c22d
--- /dev/null
+++ b/web/static/images/themes/code_themes/solarized_light.png
diff --git a/web/templates/head.html b/web/templates/head.html
index 041831ed7..fdc371af4 100644
--- a/web/templates/head.html
+++ b/web/templates/head.html
@@ -24,6 +24,7 @@
     <link rel="stylesheet" href="/static/css/bootstrap-colorpicker.min.css">
     <link rel="stylesheet" href="/static/css/styles.css">
     <link rel="stylesheet" href="/static/css/google-fonts.css">
+    <link rel="stylesheet" class="code_theme" href="">
 
     <link id="favicon" rel="icon" href="/static/images/favicon.ico" type="image/x-icon">
     <link rel="shortcut icon" href="/static/images/favicon.ico" type="image/x-icon">