Merge pull request #1572 from marktext/code-block-line-numbers

feat: add code block line numbers

docs/PREFERENCES.md

@@ -31,6 +31,7 @@ Preferences can be controlled and modified in the settings window or via the `pr
 | textDirection                      | String  | ltr                | The writing text direction, optional value: `ltr` or `rtl`                                                                                                            |
 | codeFontSize                       | Number  | 14                 | Font size on code block, the range is 12 ~ 28                                                                                                                         |
 | codeFontFamily                     | String  | `DejaVu Sans Mono` | Code font family                                                                                                                                                      |
+| codeBlockLineNumbers               | Boolean | true               | Whether to show the line numbers in code block                                                                                                                        |
 | trimUnnecessaryCodeBlockEmptyLines | Boolean | true               | Whether to trim the beginning and end empty line in Code block                                                                                                        |
 | hideQuickInsertHint                | Boolean | false              | Hide hint for quickly creating paragraphs                                                                                                                             |
 | imageDropAction                    | String  | folder             | The default behavior after paste or drag the image to Mark Text, upload it to the image cloud (if configured), move to the specified folder, insert the path          |

src/main/preferences/schema.json

@@ -94,6 +94,11 @@
     "type": "string",
     "pattern": "^[_A-z0-9]+((-|\\s)*[_A-z0-9])*$"
   },
+  "codeBlockLineNumbers": {
+    "description": "Editor--Whether to show the line numbers",
+    "type": "boolean",
+    "default": true
+  },
   "trimUnnecessaryCodeBlockEmptyLines": {
     "description": "Editor--Trim the beginning and ending empty lines in code block",
     "type": "boolean"

src/muya/lib/assets/styles/index.css

@@ -582,7 +582,7 @@ pre.ag-front-matter span.ag-code-content:first-of-type:empty::after {
 }
 
 pre[data-role$='code'] span.ag-language-input:empty::after {
-  content: 'Input Language...';
+  content: 'Input Language Identifier...';
   color: var(--editorColor10);
 }
 
@@ -621,7 +621,7 @@ pre.ag-indent-code > code::before,
 pre.ag-fence-code > code::before {
   content: '';
   position: absolute;
-  top: -10px;
+  bottom: -1em;
   right: -5px;
   color: var(--editorColor30);
   font-size: 12px;
@@ -1157,6 +1157,97 @@ span.ag-reference-link {
   padding-right: 0;
 }
 
+.ag-code-copy {
+  position: absolute;
+  top: .5em;
+  right: .5em;
+  width: 20px;
+  height: 20px;
+  border-radius: 4px;
+  cursor: pointer;
+  opacity: 0;
+  z-index: 1;
+  transition: opacity .2s ease-in-out;
+}
+
+.ag-active .ag-code-copy {
+  opacity: .5;
+}
+
+pre:not(.ag-active):hover .ag-code-copy {
+  opacity: .5;
+}
+
+.ag-code-copy:hover {
+  opacity: 1;
+}
+
+.ag-code-copy i.icon {
+  position: absolute;
+  top: 2px;
+  left: 2px;
+  width: 16px;
+  height: 16px;
+}
+
+.ag-code-copy i.icon > i[class^=icon-] {
+  width: 100%;
+  height: 100%;
+  filter: drop-shadow(16px 0 var(--iconColor));
+  position: absolute;
+  left: -16px;
+}
+
+pre.ag-paragraph.line-numbers {
+	position: relative;
+	padding-left: 2.5em;
+	counter-reset: linenumber;
+}
+
+pre.ag-paragraph.line-numbers > code {
+	position: relative;
+	white-space: inherit;
+}
+
+figure:not(.ag-active) pre.ag-paragraph.line-numbers {
+  display: none;
+}
+
+.line-numbers .line-numbers-rows {
+	position: absolute;
+	pointer-events: none;
+	top: 0;
+	font-size: 100%;
+	left: -2.5em;
+	width: 2.5em; /* works for line-numbers below 1000 lines */
+	letter-spacing: -1px;
+
+	user-select: none;
+
+}
+
+.line-numbers-sizer {
+  white-space: pre-line;
+  word-break: break-all;
+}
+
+.line-numbers-rows > span {
+	pointer-events: none;
+	display: block;
+	counter-increment: linenumber;
+}
+
+.line-numbers-rows > span:before {
+	content: counter(linenumber);
+	color: var(--editorColor30);
+	display: block;
+	padding-right: .8em;
+  text-align: right;
+  transform: scale(.8);
+  position: relative;
+  top: .05em;
+}
+
 .ag-inline-footnote-identifier {
   background: var(--codeBlockBgColor);
   padding: 0 0.4em;

src/muya/lib/config/index.js

@@ -255,6 +255,7 @@ export const MUYA_DEFAULT_OPTION = {
   bulletListMarker: '-',
   orderListDelimiter: '.',
   tabSize: 4,
+  codeBlockLineNumbers: true,
   // bullet/list marker width + listIndentation, tab or Daring Fireball Markdown (4 spaces) --> list indentation
   listIndentation: 1,
   frontmatterType: '-',

src/muya/lib/contentState/codeBlockCtrl.js

@@ -1,4 +1,5 @@
 import { loadLanguage } from '../prism/index'
+import resizeCodeBlockLineNumber from '../utils/resizeCodeLineNumber'
 import selection from '../selection'
 
 const CODE_UPDATE_REP = /^`{3,}(.*)/
@@ -123,6 +124,32 @@ const codeBlockCtrl = ContentState => {
     }
     return false
   }
+
+  /**
+   * Copy the code block by click right-top copy icon in code block.
+   */
+  ContentState.prototype.copyCodeBlock = function (event) {
+    const { target } = event
+    const preEle = target.closest('pre')
+    const preBlock = this.getBlock(preEle.id)
+    const codeBlock = preBlock.children.find(c => c.type === 'code')
+    const codeContent = codeBlock.children[0].text
+    this.muya.clipboard.copy('copyCodeContent', codeContent)
+  }
+
+  ContentState.prototype.resizeLineNumber = function () {
+    const { codeBlockLineNumbers } = this.muya.options
+    if (!codeBlockLineNumbers) {
+      return
+    }
+
+    const codeBlocks = document.querySelectorAll('pre.line-numbers')
+    if (codeBlocks.length) {
+      for (const ele of codeBlocks) {
+        resizeCodeBlockLineNumber(ele)
+      }
+    }
+  }
 }
 
 export default codeBlockCtrl

src/muya/lib/contentState/copyCutCtrl.js

@@ -47,6 +47,9 @@ const copyCutCtrl = ContentState => {
 
   ContentState.prototype.getClipBoradData = function () {
     const { start, end } = selection.getCursorRange()
+    if (!start || !end) {
+      return { html: '', text: '' }
+    }
     if (start.key === end.key) {
       const startBlock = this.getBlock(start.key)
       const { type, text, functionType } = startBlock
@@ -273,6 +276,15 @@ const copyCutCtrl = ContentState => {
         event.clipboardData.setData('text/plain', markdown)
         break
       }
+
+      case 'copyCodeContent': {
+        const codeContent = copyInfo
+        if (typeof codeContent !== 'string') {
+          return
+        }
+        event.clipboardData.setData('text/html', '')
+        event.clipboardData.setData('text/plain', codeContent)
+      }
     }
   }
 }

src/muya/lib/contentState/index.js

@@ -205,7 +205,7 @@ class ContentState {
   }
 
   postRender () {
-    // do nothing.
+    this.resizeLineNumber()
   }
 
   render (isRenderCursor = true, clearCache = false) {

src/muya/lib/eventHandler/clickEvent.js

@@ -100,6 +100,7 @@ class ClickEvent {
       const mathRender = target.closest(`.${CLASS_OR_ID.AG_MATH_RENDER}`)
       const rubyRender = target.closest(`.${CLASS_OR_ID.AG_RUBY_RENDER}`)
       const imageWrapper = target.closest(`.${CLASS_OR_ID.AG_INLINE_IMAGE}`)
+      const codeCopy = target.closest('.ag-code-copy')
       const footnoteBackLink = target.closest('.ag-footnote-backlink')
       const imageDelete = target.closest('.ag-image-icon-delete') || target.closest('.ag-image-icon-close')
       const mathText = mathRender && mathRender.previousElementSibling
@@ -116,6 +117,11 @@ class ClickEvent {
       } else if (rubyText) {
         selectionText(rubyText)
       }
+      if (codeCopy) {
+        event.stopPropagation()
+        event.preventDefault()
+        return this.muya.contentState.copyCodeBlock(event)
+      }
       // Handle delete inline iamge by click delete icon.
       if (imageDelete && imageWrapper) {
         const imageInfo = getImageInfo(imageWrapper)

src/muya/lib/eventHandler/clipboard.js

@@ -60,10 +60,11 @@ class Clipboard {
 
   /**
    * Copy the anchor block(table, paragraph, math block etc) with the info
+   * @param {string|object} type copyBlock or copyCodeContent
    * @param {string|object} info  is the block key if it's string, or block if it's object
    */
-  copy (info) {
+  copy (type, info) {
-    this._copyType = 'copyBlock'
+    this._copyType = type
     this._copyInfo = info
     document.execCommand('copy')
   }

src/muya/lib/eventHandler/resize.js

@@ -0,0 +1,22 @@
+import resizeCodeBlockLineNumber from '../utils/resizeCodeLineNumber'
+import { throttle } from '../utils'
+
+class Resize {
+  constructor (muya) {
+    this.muya = muya
+    this.listen()
+  }
+
+  listen () {
+    window.addEventListener('resize', throttle(() => {
+      const codeBlocks = document.querySelectorAll('pre.line-numbers')
+      if (codeBlocks.length) {
+        for (const ele of codeBlocks) {
+          resizeCodeBlockLineNumber(ele)
+        }
+      }
+    }, 300))
+  }
+}
+
+export default Resize

src/muya/lib/index.js

@@ -4,6 +4,7 @@ import MouseEvent from './eventHandler/mouseEvent'
 import Clipboard from './eventHandler/clipboard'
 import Keyboard from './eventHandler/keyboard'
 import DragDrop from './eventHandler/dragDrop'
+import Resize from './eventHandler/resize'
 import ClickEvent from './eventHandler/clickEvent'
 import { CLASS_OR_ID, MUYA_DEFAULT_OPTION } from './config'
 import { wordCount } from './utils'
@@ -41,6 +42,7 @@ class Muya {
     this.clickEvent = new ClickEvent(this)
     this.keyboard = new Keyboard(this)
     this.dragdrop = new DragDrop(this)
+    this.resize = new Resize(this)
     this.mouseEvent = new MouseEvent(this)
     this.init()
   }
@@ -362,7 +364,7 @@ class Muya {
    * @param {string|object} key the block key or block
    */
   copy (info) {
-    return this.clipboard.copy(info)
+    return this.clipboard.copy('copyBlock', info)
   }
 
   setOptions (options, needRender = false) {

src/muya/lib/parser/render/renderBlock/renderContainerBlock.js

@@ -2,6 +2,8 @@ import { CLASS_OR_ID } from '../../../config'
 import { renderTableTools } from './renderToolBar'
 import { footnoteJumpIcon } from './renderFootnoteJump'
 import { renderEditIcon } from './renderContainerEditIcon'
+import renderLineNumberRows from './renderLineNumber'
+import renderCopyButton from './renderCopyButton'
 import { renderLeftBar, renderBottomBar } from './renderTableDargBar'
 import { h } from '../snabbdom'
 
@@ -46,8 +48,20 @@ export default function renderContainerBlock (parent, block, activeBlocks, match
     })
   }
 
-  if (/code|pre/.test(type) && typeof lang === 'string' && !!lang) {
+  if (/code|pre/.test(type)) {
-    selector += `.language-${lang.replace(/[#.]{1}/g, '')}`
+    if (typeof lang === 'string' && !!lang) {
+      selector += `.language-${lang.replace(/[#.]{1}/g, '')}`
+    }
+    if (type === 'pre') {
+      children.unshift(renderCopyButton())
+    }
+    if (this.muya.options.codeBlockLineNumbers) {
+      if (type === 'pre') {
+        selector += '.line-numbers'
+      } else {
+        children.unshift(renderLineNumberRows(block.children[0]))
+      }
+    }
     Object.assign(data.attrs, { spellcheck: 'false' })
   }
 

src/muya/lib/parser/render/renderBlock/renderCopyButton.js

@@ -0,0 +1,21 @@
+import { h } from '../snabbdom'
+import copyIcon from '../../../assets/pngicon/copy/2.png'
+
+const renderCopyButton = () => {
+  const selector = 'a.ag-code-copy'
+  const iconVnode = h('i.icon', h('i.icon-inner', {
+    style: {
+      background: `url(${copyIcon}) no-repeat`,
+      'background-size': '100%'
+    }
+  }, ''))
+
+  return h(selector, {
+    attrs: {
+      title: 'Copy content',
+      contenteditable: 'false'
+    }
+  }, iconVnode)
+}
+
+export default renderCopyButton

src/muya/lib/parser/render/renderBlock/renderLineNumber.js

@@ -0,0 +1,22 @@
+import { h } from '../snabbdom'
+
+const NEW_LINE_EXP = /\n(?!$)/g
+
+const renderLineNumberRows = codeContent => {
+  const { text } = codeContent
+  const match = text.match(NEW_LINE_EXP)
+  let linesNum = match ? match.length + 1 : 1
+  if (text.endsWith('\n')) {
+    linesNum++
+  }
+  const data = {
+    attrs: {
+      'aria-hidden': true
+    }
+  }
+  const children = [...new Array(linesNum)].map(() => h('span'))
+
+  return h('span.line-numbers-rows', data, children)
+}
+
+export default renderLineNumberRows

src/muya/lib/utils/resizeCodeLineNumber.js

@@ -0,0 +1,57 @@
+/**
+ * This file copy from prismjs/plugins/prism-line-number
+ */
+
+/**
+ * Regular expression used for determining line breaks
+ * @type {RegExp}
+ */
+const NEW_LINE_EXP = /\n(?!$)/g
+
+/**
+ * Returns style declarations for the element
+ * @param {Element} element
+ */
+const getStyles = function (element) {
+  if (!element) {
+    return null
+  }
+
+  return window.getComputedStyle ? getComputedStyle(element) : (element.currentStyle || null)
+}
+
+/**
+* Resizes line numbers spans according to height of line of code
+* @param {Element} element <pre> element
+*/
+const resizeCodeBlockLineNumber = function (element) {
+  const codeStyles = getStyles(element)
+  const whiteSpace = codeStyles['white-space']
+
+  if (whiteSpace === 'pre' || whiteSpace === 'pre-wrap' || whiteSpace === 'pre-line') {
+    const codeElement = element.querySelector('code')
+    const lineNumbersWrapper = element.querySelector('.line-numbers-rows')
+    let lineNumberSizer = element.querySelector('.line-numbers-sizer')
+    const codeLines = codeElement.textContent.split(NEW_LINE_EXP)
+
+    if (!lineNumberSizer) {
+      lineNumberSizer = document.createElement('span')
+      lineNumberSizer.className = 'line-numbers-sizer'
+
+      codeElement.appendChild(lineNumberSizer)
+    }
+
+    lineNumberSizer.style.display = 'block'
+
+    codeLines.forEach(function (line, lineNumber) {
+      lineNumberSizer.textContent = line || '\n'
+      const lineSize = lineNumberSizer.getBoundingClientRect().height
+      lineNumbersWrapper.children[lineNumber].style.height = lineSize + 'px'
+    })
+
+    lineNumberSizer.textContent = ''
+    lineNumberSizer.style.display = 'none'
+  }
+}
+
+export default resizeCodeBlockLineNumber

src/renderer/components/editorWithTabs/editor.vue

@@ -142,6 +142,7 @@ export default {
       fontSize: state => state.preferences.fontSize,
       codeFontSize: state => state.preferences.codeFontSize,
       codeFontFamily: state => state.preferences.codeFontFamily,
+      codeBlockLineNumbers: state => state.preferences.codeBlockLineNumbers,
       trimUnnecessaryCodeBlockEmptyLines: state => state.preferences.trimUnnecessaryCodeBlockEmptyLines,
       editorFontFamily: state => state.preferences.editorFontFamily,
       hideQuickInsertHint: state => state.preferences.hideQuickInsertHint,
@@ -320,6 +321,12 @@ export default {
         })
       }
     },
+    codeBlockLineNumbers: function (value, oldValue) {
+      const { editor } = this
+      if (value !== oldValue && editor) {
+        editor.setOptions({ codeBlockLineNumbers: value }, true)
+      }
+    },
     codeFontFamily: function (value, oldValue) {
       if (value !== oldValue) {
         addCommonStyle({
@@ -451,6 +458,7 @@ export default {
         tabSize,
         fontSize,
         lineHeight,
+        codeBlockLineNumbers,
         listIndentation,
         frontmatterType,
         superSubScript,
@@ -495,6 +503,7 @@ export default {
         tabSize,
         fontSize,
         lineHeight,
+        codeBlockLineNumbers,
         listIndentation,
         frontmatterType,
         superSubScript,

src/renderer/prefComponents/editor/index.vue

@@ -39,6 +39,11 @@
       :value="codeFontFamily"
       :onChange="value => onSelectChange('codeFontFamily', value)"
     ></font-text-box>
+    <bool
+      description="Whether to show the code block line numbers."
+      :bool="codeBlockLineNumbers"
+      :onChange="value => onSelectChange('codeBlockLineNumbers', value)"
+    ></bool>
     <bool
       description="Trim the beginning and ending empty lines in code block when open markdown."
       :bool="trimUnnecessaryCodeBlockEmptyLines"
@@ -148,6 +153,7 @@ export default {
       textDirection: state => state.preferences.textDirection,
       codeFontSize: state => state.preferences.codeFontSize,
       codeFontFamily: state => state.preferences.codeFontFamily,
+      codeBlockLineNumbers: state => state.preferences.codeBlockLineNumbers,
       trimUnnecessaryCodeBlockEmptyLines: state => state.preferences.trimUnnecessaryCodeBlockEmptyLines,
       hideQuickInsertHint: state => state.preferences.hideQuickInsertHint,
       hideLinkPopup: state => state.preferences.hideLinkPopup,

src/renderer/store/preferences.js

@@ -20,6 +20,7 @@ const state = {
   lineHeight: 1.6,
   codeFontSize: 14,
   codeFontFamily: 'DejaVu Sans Mono',
+  codeBlockLineNumbers: true,
   trimUnnecessaryCodeBlockEmptyLines: true,
   editorLineWidth: '',
 

static/preference.json

@@ -16,6 +16,7 @@
   "lineHeight": 1.6,
   "codeFontSize": 14,
   "codeFontFamily": "DejaVu Sans Mono",
+  "codeBlockLineNumbers": true,
   "trimUnnecessaryCodeBlockEmptyLines": true,
   "editorLineWidth": "",