Merge branch 'master' of https://github.com/BoostIO/Boostnote into paste_storage_link_should_clone_attachment

# Conflicts:
#	browser/components/CodeEditor.js
#	browser/main/lib/dataApi/attachmentManagement.js

browser/main/SideNav/index.js

@@ -185,7 +185,7 @@ class SideNav extends React.Component {
     ).filter(
       note => activeTags.every(tag => note.tags.includes(tag))
     )
-    let relatedTags = new Set()
+    const relatedTags = new Set()
     relatedNotes.forEach(note => note.tags.map(tag => relatedTags.add(tag)))
     return relatedTags
   }
@@ -224,7 +224,7 @@ class SideNav extends React.Component {
   handleClickNarrowToTag (tag) {
     const { router } = this.context
     const { location } = this.props
-    let listOfTags = this.getActiveTags(location.pathname)
+    const listOfTags = this.getActiveTags(location.pathname)
     const indexOfTag = listOfTags.indexOf(tag)
     if (indexOfTag > -1) {
       listOfTags.splice(indexOfTag, 1)

browser/main/lib/ConfigManager.js

@@ -59,6 +59,8 @@ export const DEFAULT_CONFIG = {
     scrollPastEnd: false,
     smartQuotes: true,
     breaks: true,
+    allowCustomCSS: false,
+    customCSS: '',
     sanitize: 'STRICT' // 'STRICT', 'ALLOW_STYLES', 'NONE'
   },
   blog: {

browser/main/lib/dataApi/attachmentManagement.js

@@ -74,6 +74,31 @@ function createAttachmentDestinationFolder (destinationStoragePath, noteKey) {
   }
 }
 
+/**
+ * @description Moves attachments from the old location ('/images') to the new one ('/attachments/noteKey)
+ * @param renderedHTML HTML of the current note
+ * @param storagePath Storage path of the current note
+ * @param noteKey Key of the current note
+ */
+function migrateAttachments (renderedHTML, storagePath, noteKey) {
+  if (sander.existsSync(path.join(storagePath, 'images'))) {
+    const attachments = getAttachmentsInContent(renderedHTML) || []
+    if (attachments !== []) {
+      createAttachmentDestinationFolder(storagePath, noteKey)
+    }
+    for (const attachment of attachments) {
+      const attachmentBaseName = path.basename(attachment)
+      const possibleLegacyPath = path.join(storagePath, 'images', attachmentBaseName)
+      if (sander.existsSync(possibleLegacyPath)) {
+        const destinationPath = path.join(storagePath, DESTINATION_FOLDER, attachmentBaseName)
+        if (!sander.existsSync(destinationPath)) {
+          sander.copyFileSync(possibleLegacyPath).to(destinationPath)
+        }
+      }
+    }
+  }
+}
+
 /**
  * @description Fixes the URLs embedded in the generated HTML so that they again refer actual local files.
  * @param {String} renderedHTML HTML in that the links should be fixed
@@ -153,7 +178,8 @@ function handlePastImageEvent (codeEditor, storageKey, noteKey, dataTransferItem
     base64data += base64data.replace('+', ' ')
     const binaryData = new Buffer(base64data, 'base64').toString('binary')
     fs.writeFileSync(imagePath, binaryData, 'binary')
-    const imageMd = generateAttachmentMarkdown(imageName, imagePath, true)
+    const imageReferencePath = path.join(STORAGE_FOLDER_PLACEHOLDER, noteKey, imageName)
+    const imageMd = generateAttachmentMarkdown(imageName, imageReferencePath, true)
     codeEditor.insertAttachmentMd(imageMd)
   }
   reader.readAsDataURL(blob)
@@ -166,7 +192,7 @@ function handlePastImageEvent (codeEditor, storageKey, noteKey, dataTransferItem
  */
 function getAttachmentsInContent (markdownContent) {
   const preparedInput = markdownContent.replace(new RegExp(mdurl.encode(path.sep), 'g'), path.sep)
-  const regexp = new RegExp(STORAGE_FOLDER_PLACEHOLDER + escapeStringRegexp(path.sep) + '([a-zA-Z0-9]|-)+' + escapeStringRegexp(path.sep) + '[a-zA-Z0-9]+(\\.[a-zA-Z0-9]+)?', 'g')
+  const regexp = new RegExp(STORAGE_FOLDER_PLACEHOLDER + escapeStringRegexp(path.sep) + '?([a-zA-Z0-9]|-)*' + escapeStringRegexp(path.sep) + '[a-zA-Z0-9]+(\\.[a-zA-Z0-9]+)?', 'g')
   return preparedInput.match(regexp)
 }
 
@@ -225,7 +251,7 @@ function replaceNoteKeyWithNewNoteKey (noteContent, oldNoteKey, newNoteKey) {
  * @returns {String} Input without the references
  */
 function removeStorageAndNoteReferences (input, noteKey) {
-  return input.replace(new RegExp(mdurl.encode(path.sep), 'g'), path.sep).replace(new RegExp(STORAGE_FOLDER_PLACEHOLDER + escapeStringRegexp(path.sep) + noteKey, 'g'), DESTINATION_FOLDER)
+  return input.replace(new RegExp(mdurl.encode(path.sep), 'g'), path.sep).replace(new RegExp(STORAGE_FOLDER_PLACEHOLDER + '(' + escapeStringRegexp(path.sep) + noteKey + ')?', 'g'), DESTINATION_FOLDER)
 }
 
 /**
@@ -390,6 +416,7 @@ module.exports = {
   isAttachmentLink,
   handleAttachmentLinkPaste,
   generateFileNotFoundMarkdown,
+  migrateAttachments,
   STORAGE_FOLDER_PLACEHOLDER,
   DESTINATION_FOLDER
 }

browser/main/lib/dataApi/createSnippet.js

@@ -0,0 +1,26 @@
+import fs from 'fs'
+import crypto from 'crypto'
+import consts from 'browser/lib/consts'
+import fetchSnippet from 'browser/main/lib/dataApi/fetchSnippet'
+
+function createSnippet (snippetFile) {
+  return new Promise((resolve, reject) => {
+    const newSnippet = {
+      id: crypto.randomBytes(16).toString('hex'),
+      name: 'Unnamed snippet',
+      prefix: [],
+      content: ''
+    }
+    fetchSnippet(null, snippetFile).then((snippets) => {
+      snippets.push(newSnippet)
+      fs.writeFile(snippetFile || consts.SNIPPET_FILE, JSON.stringify(snippets, null, 4), (err) => {
+        if (err) reject(err)
+        resolve(newSnippet)
+      })
+    }).catch((err) => {
+      reject(err)
+    })
+  })
+}
+
+module.exports = createSnippet

browser/main/lib/dataApi/deleteSnippet.js

@@ -0,0 +1,17 @@
+import fs from 'fs'
+import consts from 'browser/lib/consts'
+import fetchSnippet from 'browser/main/lib/dataApi/fetchSnippet'
+
+function deleteSnippet (snippet, snippetFile) {
+  return new Promise((resolve, reject) => {
+    fetchSnippet(null, snippetFile).then((snippets) => {
+      snippets = snippets.filter(currentSnippet => currentSnippet.id !== snippet.id)
+      fs.writeFile(snippetFile || consts.SNIPPET_FILE, JSON.stringify(snippets, null, 4), (err) => {
+        if (err) reject(err)
+        resolve(snippet)
+      })
+    })
+  })
+}
+
+module.exports = deleteSnippet

browser/main/lib/dataApi/fetchSnippet.js

@@ -0,0 +1,20 @@
+import fs from 'fs'
+import consts from 'browser/lib/consts'
+
+function fetchSnippet (id, snippetFile) {
+  return new Promise((resolve, reject) => {
+    fs.readFile(snippetFile || consts.SNIPPET_FILE, 'utf8', (err, data) => {
+      if (err) {
+        reject(err)
+      }
+      const snippets = JSON.parse(data)
+      if (id) {
+        const snippet = snippets.find(snippet => { return snippet.id === id })
+        resolve(snippet)
+      }
+      resolve(snippets)
+    })
+  })
+}
+
+module.exports = fetchSnippet

browser/main/lib/dataApi/index.js

@@ -13,6 +13,10 @@ const dataApi = {
   deleteNote: require('./deleteNote'),
   moveNote: require('./moveNote'),
   migrateFromV5Storage: require('./migrateFromV5Storage'),
+  createSnippet: require('./createSnippet'),
+  deleteSnippet: require('./deleteSnippet'),
+  updateSnippet: require('./updateSnippet'),
+  fetchSnippet: require('./fetchSnippet'),
 
   _migrateFromV6Storage: require('./migrateFromV6Storage'),
   _resolveStorageData: require('./resolveStorageData'),

browser/main/lib/dataApi/updateSnippet.js

@@ -0,0 +1,33 @@
+import fs from 'fs'
+import consts from 'browser/lib/consts'
+
+function updateSnippet (snippet, snippetFile) {
+  return new Promise((resolve, reject) => {
+    const snippets = JSON.parse(fs.readFileSync(snippetFile || consts.SNIPPET_FILE, 'utf-8'))
+
+    for (let i = 0; i < snippets.length; i++) {
+      const currentSnippet = snippets[i]
+
+      if (currentSnippet.id === snippet.id) {
+        if (
+          currentSnippet.name === snippet.name &&
+          currentSnippet.prefix === snippet.prefix &&
+          currentSnippet.content === snippet.content
+        ) {
+          // if everything is the same then don't write to disk
+          resolve(snippets)
+        } else {
+          currentSnippet.name = snippet.name
+          currentSnippet.prefix = snippet.prefix
+          currentSnippet.content = snippet.content
+          fs.writeFile(snippetFile || consts.SNIPPET_FILE, JSON.stringify(snippets, null, 4), (err) => {
+            if (err) reject(err)
+            resolve(snippets)
+          })
+        }
+      }
+    }
+  })
+}
+
+module.exports = updateSnippet

browser/main/modals/PreferencesModal/SnippetEditor.js

@@ -0,0 +1,90 @@
+import CodeMirror from 'codemirror'
+import React from 'react'
+import _ from 'lodash'
+import styles from './SnippetTab.styl'
+import CSSModules from 'browser/lib/CSSModules'
+import dataApi from 'browser/main/lib/dataApi'
+
+const defaultEditorFontFamily = ['Monaco', 'Menlo', 'Ubuntu Mono', 'Consolas', 'source-code-pro', 'monospace']
+const buildCMRulers = (rulers, enableRulers) =>
+  enableRulers ? rulers.map(ruler => ({ column: ruler })) : []
+
+class SnippetEditor extends React.Component {
+
+  componentDidMount () {
+    this.props.onRef(this)
+    const { rulers, enableRulers } = this.props
+    this.cm = CodeMirror(this.refs.root, {
+      rulers: buildCMRulers(rulers, enableRulers),
+      lineNumbers: this.props.displayLineNumbers,
+      lineWrapping: true,
+      theme: this.props.theme,
+      indentUnit: this.props.indentSize,
+      tabSize: this.props.indentSize,
+      indentWithTabs: this.props.indentType !== 'space',
+      keyMap: this.props.keyMap,
+      scrollPastEnd: this.props.scrollPastEnd,
+      dragDrop: false,
+      foldGutter: true,
+      gutters: ['CodeMirror-linenumbers', 'CodeMirror-foldgutter'],
+      autoCloseBrackets: true,
+      mode: 'null'
+    })
+    this.cm.setSize('100%', '100%')
+    let changeDelay = null
+
+    this.cm.on('change', () => {
+      this.snippet.content = this.cm.getValue()
+
+      clearTimeout(changeDelay)
+      changeDelay = setTimeout(() => {
+        this.saveSnippet()
+      }, 500)
+    })
+  }
+
+  componentWillUnmount () {
+    this.props.onRef(undefined)
+  }
+
+  onSnippetChanged (newSnippet) {
+    this.snippet = newSnippet
+    this.cm.setValue(this.snippet.content)
+  }
+
+  onSnippetNameOrPrefixChanged (newSnippet) {
+    this.snippet.name = newSnippet.name
+    this.snippet.prefix = newSnippet.prefix.toString().replace(/\s/g, '').split(',')
+    this.saveSnippet()
+  }
+
+  saveSnippet () {
+    dataApi.updateSnippet(this.snippet).catch((err) => { throw err })
+  }
+
+  render () {
+    const { fontSize } = this.props
+    let fontFamily = this.props.fontFamily
+    fontFamily = _.isString(fontFamily) && fontFamily.length > 0
+      ? [fontFamily].concat(defaultEditorFontFamily)
+      : defaultEditorFontFamily
+    return (
+      <div styleName='SnippetEditor' ref='root' tabIndex='-1' style={{
+        fontFamily: fontFamily.join(', '),
+        fontSize: fontSize
+      }} />
+    )
+  }
+}
+
+SnippetEditor.defaultProps = {
+  readOnly: false,
+  theme: 'xcode',
+  keyMap: 'sublime',
+  fontSize: 14,
+  fontFamily: 'Monaco, Consolas',
+  indentSize: 4,
+  indentType: 'space'
+}
+
+export default CSSModules(SnippetEditor, styles)

browser/main/modals/PreferencesModal/SnippetList.js

@@ -0,0 +1,87 @@
+import React from 'react'
+import styles from './SnippetTab.styl'
+import CSSModules from 'browser/lib/CSSModules'
+import dataApi from 'browser/main/lib/dataApi'
+import i18n from 'browser/lib/i18n'
+import eventEmitter from 'browser/main/lib/eventEmitter'
+const { remote } = require('electron')
+const { Menu, MenuItem } = remote
+
+class SnippetList extends React.Component {
+  constructor (props) {
+    super(props)
+    this.state = {
+      snippets: []
+    }
+  }
+
+  componentDidMount () {
+    this.reloadSnippetList()
+    eventEmitter.on('snippetList:reload', this.reloadSnippetList.bind(this))
+  }
+
+  reloadSnippetList () {
+    dataApi.fetchSnippet().then(snippets => this.setState({snippets}))
+  }
+
+  handleSnippetContextMenu (snippet) {
+    const menu = new Menu()
+    menu.append(new MenuItem({
+      label: i18n.__('Delete snippet'),
+      click: () => {
+        this.deleteSnippet(snippet)
+      }
+    }))
+    menu.popup()
+  }
+
+  deleteSnippet (snippet) {
+    dataApi.deleteSnippet(snippet).then(() => {
+      this.reloadSnippetList()
+      this.props.onSnippetDeleted(snippet)
+    }).catch(err => { throw err })
+  }
+
+  handleSnippetClick (snippet) {
+    this.props.onSnippetClick(snippet)
+  }
+
+  createSnippet () {
+    dataApi.createSnippet().then(() => {
+      this.reloadSnippetList()
+      // scroll to end of list when added new snippet
+      const snippetList = document.getElementById('snippets')
+      snippetList.scrollTop = snippetList.scrollHeight
+    }).catch(err => { throw err })
+  }
+
+  render () {
+    const { snippets } = this.state
+    return (
+      <div styleName='snippet-list'>
+        <div styleName='group-section'>
+          <div styleName='group-section-control'>
+            <button styleName='group-control-button' onClick={() => this.createSnippet()}>
+              <i className='fa fa-plus' /> {i18n.__('New Snippet')}
+            </button>
+          </div>
+        </div>
+        <ul id='snippets' styleName='snippets'>
+          {
+            snippets.map((snippet) => (
+              <li
+                styleName='snippet-item'
+                key={snippet.id}
+                onContextMenu={() => this.handleSnippetContextMenu(snippet)}
+                onClick={() => this.handleSnippetClick(snippet)}>
+                {snippet.name}
+              </li>
+            ))
+          }
+        </ul>
+      </div>
+    )
+  }
+}
+
+export default CSSModules(SnippetList, styles)

browser/main/modals/PreferencesModal/SnippetTab.js

@@ -0,0 +1,116 @@
+import React from 'react'
+import CSSModules from 'browser/lib/CSSModules'
+import styles from './SnippetTab.styl'
+import SnippetEditor from './SnippetEditor'
+import i18n from 'browser/lib/i18n'
+import dataApi from 'browser/main/lib/dataApi'
+import SnippetList from './SnippetList'
+import eventEmitter from 'browser/main/lib/eventEmitter'
+
+class SnippetTab extends React.Component {
+  constructor (props) {
+    super(props)
+    this.state = {
+      currentSnippet: null
+    }
+    this.changeDelay = null
+  }
+
+  handleSnippetNameOrPrefixChange () {
+    clearTimeout(this.changeDelay)
+    this.changeDelay = setTimeout(() => {
+      // notify the snippet editor that the name or prefix of snippet has been changed
+      this.snippetEditor.onSnippetNameOrPrefixChanged(this.state.currentSnippet)
+      eventEmitter.emit('snippetList:reload')
+    }, 500)
+  }
+
+  handleSnippetClick (snippet) {
+    const { currentSnippet } = this.state
+    if (currentSnippet === null || currentSnippet.id !== snippet.id) {
+      dataApi.fetchSnippet(snippet.id).then(changedSnippet => {
+        // notify the snippet editor to load the content of the new snippet
+        this.snippetEditor.onSnippetChanged(changedSnippet)
+        this.setState({currentSnippet: changedSnippet})
+      })
+    }
+  }
+
+  onSnippetNameOrPrefixChanged (e, type) {
+    const newSnippet = Object.assign({}, this.state.currentSnippet)
+    if (type === 'name') {
+      newSnippet.name = e.target.value
+    } else {
+      newSnippet.prefix = e.target.value
+    }
+    this.setState({ currentSnippet: newSnippet })
+    this.handleSnippetNameOrPrefixChange()
+  }
+
+  handleDeleteSnippet (snippet) {
+    // prevent old snippet still display when deleted
+    if (snippet.id === this.state.currentSnippet.id) {
+      this.setState({currentSnippet: null})
+    }
+  }
+
+  render () {
+    const { config, storageKey } = this.props
+    const { currentSnippet } = this.state
+
+    let editorFontSize = parseInt(config.editor.fontSize, 10)
+    if (!(editorFontSize > 0 && editorFontSize < 101)) editorFontSize = 14
+    let editorIndentSize = parseInt(config.editor.indentSize, 10)
+    if (!(editorFontSize > 0 && editorFontSize < 132)) editorIndentSize = 4
+    return (
+      <div styleName='root'>
+        <div styleName='header'>{i18n.__('Snippets')}</div>
+        <SnippetList
+          onSnippetClick={this.handleSnippetClick.bind(this)}
+          onSnippetDeleted={this.handleDeleteSnippet.bind(this)} />
+        <div styleName='snippet-detail' style={{visibility: currentSnippet ? 'visible' : 'hidden'}}>
+          <div styleName='group-section'>
+            <div styleName='group-section-label'>{i18n.__('Snippet name')}</div>
+            <div styleName='group-section-control'>
+              <input
+                styleName='group-section-control-input'
+                value={currentSnippet ? currentSnippet.name : ''}
+                onChange={e => { this.onSnippetNameOrPrefixChanged(e, 'name') }}
+                type='text' />
+            </div>
+          </div>
+          <div styleName='group-section'>
+            <div styleName='group-section-label'>{i18n.__('Snippet prefix')}</div>
+            <div styleName='group-section-control'>
+              <input
+                styleName='group-section-control-input'
+                value={currentSnippet ? currentSnippet.prefix : ''}
+                onChange={e => { this.onSnippetNameOrPrefixChanged(e, 'prefix') }}
+                type='text' />
+            </div>
+          </div>
+          <div styleName='snippet-editor-section'>
+            <SnippetEditor
+              storageKey={storageKey}
+              theme={config.editor.theme}
+              keyMap={config.editor.keyMap}
+              fontFamily={config.editor.fontFamily}
+              fontSize={editorFontSize}
+              indentType={config.editor.indentType}
+              indentSize={editorIndentSize}
+              enableRulers={config.editor.enableRulers}
+              rulers={config.editor.rulers}
+              displayLineNumbers={config.editor.displayLineNumbers}
+              scrollPastEnd={config.editor.scrollPastEnd}
+              onRef={ref => { this.snippetEditor = ref }} />
+          </div>
+        </div>
+      </div>
+    )
+  }
+}
+
+SnippetTab.PropTypes = {
+}
+
+export default CSSModules(SnippetTab, styles)

browser/main/modals/PreferencesModal/SnippetTab.styl

@@ -0,0 +1,180 @@
+@import('./Tab')
+@import('./ConfigTab')
+
+.root
+  padding 15px
+  white-space pre
+  line-height 1.4
+  color alpha($ui-text-color, 90%)
+  width 100%
+  font-size 14px
+
+.group
+  margin-bottom 45px
+
+.group-header
+  @extend .header
+  color $ui-text-color
+
+.group-header2
+  font-size 20px
+  color $ui-text-color
+  margin-bottom 15px
+  margin-top 30px
+
+.group-section
+  margin-bottom 20px
+  display flex
+  line-height 30px
+
+.group-section-label
+  width 150px
+  text-align left
+  margin-right 10px
+  font-size 14px
+
+.group-section-control
+  flex 1
+  margin-left 5px
+
+.group-section-control select
+  outline none
+  border 1px solid $ui-borderColor
+  font-size 16px
+  height 30px
+  width 250px
+  margin-bottom 5px
+  background-color transparent
+
+.group-section-control-input
+  height 30px
+  vertical-align middle
+  width 400px
+  font-size $tab--button-font-size
+  border solid 1px $border-color
+  border-radius 2px
+  padding 0 5px
+  outline none
+  &:disabled
+    background-color $ui-input--disabled-backgroundColor
+
+.group-control-button
+  height 30px
+  border none
+  border-top-right-radius 2px
+  border-bottom-right-radius 2px
+  colorPrimaryButton()
+  vertical-align middle
+  padding 0 20px
+
+.group-checkBoxSection
+  margin-bottom 15px
+  display flex
+  line-height 30px
+  padding-left 15px
+
+.group-control
+  padding-top 10px
+  box-sizing border-box
+  height 40px
+  text-align right
+  :global
+    .alert
+      display inline-block
+      position absolute
+      top 60px
+      right 15px
+      font-size 14px
+    .success
+      color #1EC38B
+    .error
+      color red
+    .warning
+      color #FFA500
+
+.snippet-list
+  width 30%
+  height calc(100% - 200px)
+  position absolute
+
+  .snippets
+    height calc(100% - 8px)
+    overflow scroll
+    background: #f5f5f5
+
+  .snippet-item
+    height 50px
+    font-size 15px
+    line-height 50px
+    padding 0 5%
+    cursor pointer
+    position relative
+
+    &::after
+      width 90%
+      height 1px
+      background rgba(0, 0, 0, 0.1)
+      position absolute
+      top 100%
+      left 5%
+      content ''
+
+    &:hover
+      background darken(#f5f5f5, 5)
+
+.snippet-detail
+  width 70%
+  height calc(100% - 200px)
+  position absolute
+  left 33%
+
+.SnippetEditor
+  position absolute
+  width 100%
+  height 90%
+
+body[data-theme="default"], body[data-theme="white"]
+  .snippets
+    background $ui-backgroundColor
+    .snippet-item
+      color black
+      &::after
+        background $ui-borderColor
+      &:hover
+        background darken($ui-backgroundColor, 5)
+
+body[data-theme="dark"]
+  .snippets
+    background $ui-dark-backgroundColor
+    .snippet-item
+      color white
+      &::after
+        background $ui-dark-borderColor
+      &:hover
+        background darken($ui-dark-backgroundColor, 5)
+  .snippet-detail
+    color white
+
+body[data-theme="solarized-dark"]
+  .snippets
+    background $ui-solarized-dark-backgroundColor
+    .snippet-item
+      color white
+      &::after
+        background $ui-solarized-dark-borderColor
+      &:hover
+        background darken($ui-solarized-dark-backgroundColor, 5)
+  .snippet-detail
+    color white
+
+body[data-theme="monokai"]
+  .snippets
+    background $ui-monokai-backgroundColor
+    .snippet-item
+      color White
+      &::after
+        background $ui-monokai-borderColor
+      &:hover
+        background darken($ui-monokai-backgroundColor, 5)
+  .snippet-detail
+    color white

browser/main/modals/PreferencesModal/UiTab.js

@@ -28,6 +28,8 @@ class UiTab extends React.Component {
 
   componentDidMount () {
     CodeMirror.autoLoadMode(this.codeMirrorInstance.getCodeMirror(), 'javascript')
+    CodeMirror.autoLoadMode(this.customCSSCM.getCodeMirror(), 'css')
+    this.customCSSCM.getCodeMirror().setSize('400px', '400px')
     this.handleSettingDone = () => {
       this.setState({UiAlert: {
         type: 'success',
@@ -98,7 +100,9 @@ class UiTab extends React.Component {
         scrollPastEnd: this.refs.previewScrollPastEnd.checked,
         smartQuotes: this.refs.previewSmartQuotes.checked,
         breaks: this.refs.previewBreaks.checked,
-        sanitize: this.refs.previewSanitize.value
+        sanitize: this.refs.previewSanitize.value,
+        allowCustomCSS: this.refs.previewAllowCustomCSS.checked,
+        customCSS: this.customCSSCM.getCodeMirror().getValue()
       }
     }
 
@@ -159,6 +163,7 @@ class UiTab extends React.Component {
     const { config, codemirrorTheme } = this.state
     const codemirrorSampleCode = 'function iamHappy (happy) {\n\tif (happy) {\n\t  console.log("I am Happy!")\n\t} else {\n\t  console.log("I am not Happy!")\n\t}\n};'
     const enableEditRulersStyle = config.editor.enableRulers ? 'block' : 'none'
+    const customCSS = config.preview.customCSS
     return (
       <div styleName='root'>
         <div styleName='group'>
@@ -569,6 +574,20 @@ class UiTab extends React.Component {
               />
             </div>
           </div>
+          <div styleName='group-section'>
+            <div styleName='group-section-label'>
+              {i18n.__('Custom CSS')}
+            </div>
+            <div styleName='group-section-control'>
+              <input onChange={(e) => this.handleUIChange(e)}
+                checked={config.preview.allowCustomCSS}
+                ref='previewAllowCustomCSS'
+                type='checkbox'
+              />&nbsp;
+              {i18n.__('Allow custom CSS for preview')}
+              <ReactCodeMirror onChange={e => this.handleUIChange(e)} ref={e => (this.customCSSCM = e)} value={config.preview.customCSS} options={{ lineNumbers: true, mode: 'css', theme: codemirrorTheme }} />
+            </div>
+          </div>
 
           <div styleName='group-control'>
             <button styleName='group-control-rightButton'

browser/main/modals/PreferencesModal/index.js

@@ -6,6 +6,7 @@ import UiTab from './UiTab'
 import InfoTab from './InfoTab'
 import Crowdfunding from './Crowdfunding'
 import StoragesTab from './StoragesTab'
+import SnippetTab from './SnippetTab'
 import Blog from './Blog'
 import ModalEscButton from 'browser/components/ModalEscButton'
 import CSSModules from 'browser/lib/CSSModules'
@@ -86,6 +87,14 @@ class Preferences extends React.Component {
             haveToSave={alert => this.setState({BlogAlert: alert})}
           />
         )
+      case 'SNIPPET':
+        return (
+          <SnippetTab
+            dispatch={dispatch}
+            config={config}
+            data={data}
+          />
+        )
       case 'STORAGES':
       default:
         return (
@@ -123,7 +132,8 @@ class Preferences extends React.Component {
       {target: 'UI', label: i18n.__('Interface'), UI: this.state.UIAlert},
       {target: 'INFO', label: i18n.__('About')},
       {target: 'CROWDFUNDING', label: i18n.__('Crowdfunding')},
-      {target: 'BLOG', label: i18n.__('Blog'), Blog: this.state.BlogAlert}
+      {target: 'BLOG', label: i18n.__('Blog'), Blog: this.state.BlogAlert},
+      {target: 'SNIPPET', label: i18n.__('Snippets')}
     ]
 
     const navButtons = tabs.map((tab) => {