feat: 新增設置代碼行數限制，顯示展開按鈕

improvement: prismjs 可以配置 code_word_wrap
improvement: 搜索 hover 效果與其它目錄一致
improvement: css 優化
fix: 修復prismjs 無法識別的語言 顯示 null 而不是顯示 code 的 bug
fix: 修復默認代碼大小不會隨着字體放大/放小而改變的bug
fix: 修復prismjs 在ios safari 下自動換行的bug

source/js/main.js

@@ -81,123 +81,142 @@ document.addEventListener('DOMContentLoaded', function () {
  * 只適用於Hexo默認的代碼渲染
  */
   const addHighlightTool = function () {
-    const isHighlightCopy = GLOBAL_CONFIG.highlight.highlightCopy
-    const isHighlightLang = GLOBAL_CONFIG.highlight.highlightLang
+    const highLight = GLOBAL_CONFIG.highlight
+    if (!highLight) return
+
+    const isHighlightCopy = highLight.highlightCopy
+    const isHighlightLang = highLight.highlightLang
     const isHighlightShrink = GLOBAL_CONFIG_SITE.isHighlightShrink
+    const highlightHeightLimit = highLight.highlightHeightLimit
     const isShowTool = isHighlightCopy || isHighlightLang || isHighlightShrink !== undefined
-    const $figureHighlight = GLOBAL_CONFIG.highlight.plugin === 'highlighjs' ? document.querySelectorAll('figure.highlight') : document.querySelectorAll('pre[class*="language-"]')
+    const $figureHighlight = highLight.plugin === 'highlighjs' ? document.querySelectorAll('figure.highlight') : document.querySelectorAll('pre[class*="language-"]')
 
-    if (isShowTool && $figureHighlight.length) {
-      const isPrismjs = GLOBAL_CONFIG.highlight.plugin === 'prismjs'
+    if (!((isShowTool || highlightHeightLimit) && $figureHighlight.length)) return
 
-      let highlightShrinkEle = ''
-      let highlightCopyEle = ''
-      const highlightShrinkClass = isHighlightShrink === true ? 'closed' : ''
+    const isPrismjs = highLight.plugin === 'prismjs'
 
-      if (isHighlightShrink !== undefined) {
-        highlightShrinkEle = `<i class="fas fa-angle-down expand ${highlightShrinkClass}"></i>`
-      }
+    let highlightShrinkEle = ''
+    let highlightCopyEle = ''
+    const highlightShrinkClass = isHighlightShrink === true ? 'closed' : ''
 
-      if (isHighlightCopy) {
-        highlightCopyEle = '<div class="copy-notice"></div><i class="fas fa-paste copy-button"></i>'
-      }
+    if (isHighlightShrink !== undefined) {
+      highlightShrinkEle = `<i class="fas fa-angle-down expand ${highlightShrinkClass}"></i>`
+    }
 
-      const copy = (text, ctx) => {
-        if (document.queryCommandSupported && document.queryCommandSupported('copy')) {
-          document.execCommand('copy')
-          if (GLOBAL_CONFIG.Snackbar !== undefined) {
-            btf.snackbarShow(GLOBAL_CONFIG.copy.success)
-          } else {
-            const prevEle = ctx.previousElementSibling
-            prevEle.innerText = GLOBAL_CONFIG.copy.success
-            prevEle.style.opacity = 1
-            setTimeout(() => { prevEle.style.opacity = 0 }, 700)
-          }
+    if (isHighlightCopy) {
+      highlightCopyEle = '<div class="copy-notice"></div><i class="fas fa-paste copy-button"></i>'
+    }
+
+    const copy = (text, ctx) => {
+      if (document.queryCommandSupported && document.queryCommandSupported('copy')) {
+        document.execCommand('copy')
+        if (GLOBAL_CONFIG.Snackbar !== undefined) {
+          btf.snackbarShow(GLOBAL_CONFIG.copy.success)
         } else {
-          if (GLOBAL_CONFIG.Snackbar !== undefined) {
-            btf.snackbarShow(GLOBAL_CONFIG.copy.noSupport)
-          } else {
-            ctx.previousElementSibling.innerText = GLOBAL_CONFIG.copy.noSupport
-          }
-        }
-      }
-
-      // click events
-      const highlightCopyFn = (ele) => {
-        const $buttonParent = ele.parentNode
-        $buttonParent.classList.add('copy-true')
-        const selection = window.getSelection()
-        const range = document.createRange()
-        if (isPrismjs) range.selectNodeContents($buttonParent.querySelectorAll('pre code')[0])
-        else range.selectNodeContents($buttonParent.querySelectorAll('table .code pre')[0])
-        selection.removeAllRanges()
-        selection.addRange(range)
-        const text = selection.toString()
-        copy(text, ele.lastChild)
-        selection.removeAllRanges()
-        $buttonParent.classList.remove('copy-true')
-      }
-
-      const highlightShrinkFn = (ele) => {
-        const $nextEle = [...ele.parentNode.children].slice(1)
-        ele.firstChild.classList.toggle('closed')
-        if (btf.isHidden($nextEle[0])) {
-          $nextEle.forEach(e => { e.style.display = 'block' })
-        } else {
-          $nextEle.forEach(e => { e.style.display = 'none' })
-        }
-      }
-
-      const highlightToolsFn = function (e) {
-        const $target = e.target.classList
-        if ($target.contains('expand')) highlightShrinkFn(this)
-        else if ($target.contains('copy-button')) highlightCopyFn(this)
-      }
-
-      const createEle = () => {
-        const newEle = document.createElement('div')
-        newEle.className = `highlight-tools ${highlightShrinkClass}`
-        newEle.addEventListener('click', highlightToolsFn)
-        return newEle
-      }
-
-      if (isHighlightLang) {
-        if (isPrismjs) {
-          $figureHighlight.forEach(function (item) {
-            const langName = item.getAttribute('data-language') !== undefined ? item.getAttribute('data-language') : 'Code'
-            const highlightLangEle = `<div class="code-lang">${langName}</div>`
-            btf.wrap(item, 'figure', '', 'highlight')
-            const newEle = createEle()
-            newEle.innerHTML = highlightShrinkEle + highlightLangEle + highlightCopyEle
-            item.parentNode.insertBefore(newEle, item)
-          })
-        } else {
-          $figureHighlight.forEach(function (item) {
-            let langName = item.getAttribute('class').split(' ')[1]
-            if (langName === 'plain' || langName === undefined) langName = 'Code'
-            const highlightLangEle = `<div class="code-lang">${langName}</div>`
-            const newEle = createEle()
-            newEle.innerHTML = highlightShrinkEle + highlightLangEle + highlightCopyEle
-            item.insertBefore(newEle, item.firstChild)
-          })
+          const prevEle = ctx.previousElementSibling
+          prevEle.innerText = GLOBAL_CONFIG.copy.success
+          prevEle.style.opacity = 1
+          setTimeout(() => { prevEle.style.opacity = 0 }, 700)
         }
       } else {
-        if (isPrismjs) {
-          $figureHighlight.forEach(function (item) {
-            btf.wrap(item, 'figure', '', 'highlight')
-            const newEle = createEle()
-            newEle.innerHTML = highlightShrinkEle + highlightCopyEle
-            item.parentNode.insertBefore(newEle, item)
-          })
+        if (GLOBAL_CONFIG.Snackbar !== undefined) {
+          btf.snackbarShow(GLOBAL_CONFIG.copy.noSupport)
         } else {
-          $figureHighlight.forEach(function (item) {
-            const newEle = createEle()
-            newEle.innerHTML = highlightShrinkEle + highlightCopyEle
-            item.insertBefore(newEle, item.firstChild)
-          })
+          ctx.previousElementSibling.innerText = GLOBAL_CONFIG.copy.noSupport
         }
       }
     }
+
+    // click events
+    const highlightCopyFn = (ele) => {
+      const $buttonParent = ele.parentNode
+      $buttonParent.classList.add('copy-true')
+      const selection = window.getSelection()
+      const range = document.createRange()
+      if (isPrismjs) range.selectNodeContents($buttonParent.querySelectorAll('pre code')[0])
+      else range.selectNodeContents($buttonParent.querySelectorAll('table .code pre')[0])
+      selection.removeAllRanges()
+      selection.addRange(range)
+      const text = selection.toString()
+      copy(text, ele.lastChild)
+      selection.removeAllRanges()
+      $buttonParent.classList.remove('copy-true')
+    }
+
+    const highlightShrinkFn = (ele) => {
+      const $nextEle = [...ele.parentNode.children].slice(1)
+      ele.firstChild.classList.toggle('closed')
+      if (btf.isHidden($nextEle[0])) {
+        $nextEle.forEach(e => { e.style.display = 'block' })
+      } else {
+        $nextEle.forEach(e => { e.style.display = 'none' })
+      }
+    }
+
+    const highlightToolsFn = function (e) {
+      const $target = e.target.classList
+      if ($target.contains('expand')) highlightShrinkFn(this)
+      else if ($target.contains('copy-button')) highlightCopyFn(this)
+    }
+
+    const expandCode = function () {
+      this.classList.toggle('expand-done')
+    }
+
+    function createEle (lang, item, service) {
+      const fragment = document.createDocumentFragment()
+
+      if (isShowTool) {
+        const hlTools = document.createElement('div')
+        hlTools.className = `highlight-tools ${highlightShrinkClass}`
+        hlTools.innerHTML = highlightShrinkEle + lang + highlightCopyEle
+        hlTools.addEventListener('click', highlightToolsFn)
+        fragment.appendChild(hlTools)
+      }
+
+      if (highlightHeightLimit && item.offsetHeight > highlightHeightLimit + 30) {
+        const ele = document.createElement('div')
+        ele.className = 'code-expand-btn'
+        ele.innerHTML = '<i class="fas fa-angle-double-down"></i>'
+        ele.addEventListener('click', expandCode)
+        fragment.appendChild(ele)
+      }
+
+      if (service === 'hl') {
+        item.insertBefore(fragment, item.firstChild)
+      } else {
+        item.parentNode.insertBefore(fragment, item)
+      }
+    }
+
+    if (isHighlightLang) {
+      if (isPrismjs) {
+        $figureHighlight.forEach(function (item) {
+          const langName = item.getAttribute('data-language') ? item.getAttribute('data-language') : 'Code'
+          const highlightLangEle = `<div class="code-lang">${langName}</div>`
+          btf.wrap(item, 'figure', '', 'highlight')
+          createEle(highlightLangEle, item)
+        })
+      } else {
+        $figureHighlight.forEach(function (item) {
+          let langName = item.getAttribute('class').split(' ')[1]
+          if (langName === 'plain' || langName === undefined) langName = 'Code'
+          const highlightLangEle = `<div class="code-lang">${langName}</div>`
+          createEle(highlightLangEle, item, 'hl')
+        })
+      }
+    } else {
+      if (isPrismjs) {
+        $figureHighlight.forEach(function (item) {
+          btf.wrap(item, 'figure', '', 'highlight')
+          createEle('', item)
+        })
+      } else {
+        $figureHighlight.forEach(function (item) {
+          createEle('', item, 'hl')
+        })
+      }
+    }
   }
 
   /**
@@ -819,7 +838,7 @@ document.addEventListener('DOMContentLoaded', function () {
 
     sidebarFn()
     GLOBAL_CONFIG_SITE.isHome && scrollDownInIndex()
-    GLOBAL_CONFIG.highlight && addHighlightTool()
+    addHighlightTool()
     GLOBAL_CONFIG.isPhotoFigcaption && addPhotoFigcaption()
     jqLoadAndRun()
     GLOBAL_CONFIG.lightbox === 'mediumZoom' && addMediumZoom()