add theme

themes/butterfly/layout/includes/third-party/math/chartjs.pug

@@ -0,0 +1,91 @@
+- const { fontColor, borderColor, scale_ticks_backdropColor } = theme.chartjs
+
+script.
+  (() => {
+    const applyThemeDefaultsConfig = theme => {
+      if (theme === 'dark-mode') {
+        Chart.defaults.color = "!{fontColor.dark}"
+        Chart.defaults.borderColor = "!{borderColor.dark}"
+        Chart.defaults.scale.ticks.backdropColor = "!{scale_ticks_backdropColor.dark}"
+      } else {
+        Chart.defaults.color = "!{fontColor.light}"
+        Chart.defaults.borderColor = "!{borderColor.light}"
+        Chart.defaults.scale.ticks.backdropColor = "!{scale_ticks_backdropColor.light}"
+      }
+    }
+
+    // Recursively traverse the config object and automatically apply theme-specific color schemes
+    const applyThemeConfig = (obj, theme) => {
+      if (typeof obj !== 'object' || obj === null) return
+
+      Object.keys(obj).forEach(key => {
+        const value = obj[key]
+        // If the property is an object and has theme-specific options, apply them
+        if (typeof value === 'object' && value !== null) {
+          if (value[theme]) {
+            obj[key] = value[theme] // Apply the value for the current theme
+          } else {
+            // Recursively process child objects
+            applyThemeConfig(value, theme)
+          }
+        }
+      })
+    }
+
+    const runChartJS = ele => {
+      window.loadChartJS = true
+
+      Array.from(ele).forEach((item, index) => {
+        const chartSrc = item.firstElementChild
+        const chartID = item.getAttribute('data-chartjs-id') || ('chartjs-' + index) // Use custom ID or default ID
+        const width = item.getAttribute('data-width')
+        const existingCanvas = document.getElementById(chartID)
+
+        // If a canvas already exists, remove it to avoid rendering duplicates
+        if (existingCanvas) {
+            existingCanvas.parentNode.remove()
+        }
+
+        const chartDefinition = chartSrc.textContent
+        const canvas = document.createElement('canvas')
+        canvas.id = chartID
+
+        const div = document.createElement('div')
+        div.className = 'chartjs-wrap'
+
+        if (width) {
+          div.style.width = width
+        }
+
+        div.appendChild(canvas)
+        chartSrc.insertAdjacentElement('afterend', div)
+
+        const ctx = document.getElementById(chartID).getContext('2d')
+
+        const config = JSON.parse(chartDefinition)
+
+        const theme = document.documentElement.getAttribute('data-theme') === 'dark' ? 'dark-mode' : 'light-mode'
+
+        // Set default styles (initial setup)
+        applyThemeDefaultsConfig(theme)
+
+        // Automatically traverse the config and apply dual-mode color schemes
+        applyThemeConfig(config, theme)
+
+        new Chart(ctx, config)
+      })
+    }
+
+    const loadChartJS = () => {
+      const chartJSEle = document.querySelectorAll('#article-container .chartjs-container')
+      if (chartJSEle.length === 0) return
+
+      window.loadChartJS ? runChartJS(chartJSEle) : btf.getScript('!{url_for(theme.asset.chartjs)}').then(() => runChartJS(chartJSEle))
+    }
+
+    // Listen for theme change events
+    btf.addGlobalFn('themeChange', loadChartJS, 'chartjs')
+    btf.addGlobalFn('encrypt', loadChartJS, 'chartjs')
+
+    window.pjax ? loadChartJS() : document.addEventListener('DOMContentLoaded', loadChartJS)
+  })()

themes/butterfly/layout/includes/third-party/math/index.pug

@@ -0,0 +1,14 @@
+case theme.math.use
+  when 'mathjax'
+    if (theme.math.per_page && (['post','page'].includes(globalPageType))) || page.mathjax
+      include ./mathjax.pug
+
+  when 'katex'
+    if (theme.math.per_page && (['post','page'].includes(globalPageType))) || page.katex
+      include ./katex.pug
+
+if theme.mermaid.enable
+  include ./mermaid.pug
+
+if theme.chartjs.enable
+  include ./chartjs.pug

themes/butterfly/layout/includes/third-party/math/katex.pug

@@ -0,0 +1,16 @@
+script.
+  (async () => {
+    const showKatex = () => {
+      document.querySelectorAll('#article-container .katex').forEach(el => el.classList.add('katex-show'))
+    }
+
+    if (!window.katex_js_css) {
+      window.katex_js_css = true
+      await btf.getCSS('!{url_for(theme.asset.katex)}')
+      if (!{theme.math.katex.copy_tex}) {
+        await btf.getScript('!{url_for(theme.asset.katex_copytex)}')
+      }
+    }
+
+    showKatex()
+  })()

themes/butterfly/layout/includes/third-party/math/mathjax.pug

@@ -0,0 +1,47 @@
+//- Mathjax 3
+- const { tags, enableMenu } = theme.math.mathjax
+script.
+  (() => {
+    const loadMathjax = () => {
+      if (!window.MathJax) {
+        window.MathJax = {
+          tex: {
+            inlineMath: [['$', '$'], ['\\(', '\\)']],
+            tags: '!{tags}',
+          },
+          chtml: {
+            scale: 1.1
+          },
+          options: {
+            enableMenu: !{enableMenu},
+            renderActions: {
+              findScript: [10, doc => {
+                for (const node of document.querySelectorAll('script[type^="math/tex"]')) {
+                  const display = !!node.type.match(/; *mode=display/)
+                  const math = new doc.options.MathItem(node.textContent, doc.inputJax[0], display)
+                  const text = document.createTextNode('')
+                  node.parentNode.replaceChild(text, node)
+                  math.start = {node: text, delim: '', n: 0}
+                  math.end = {node: text, delim: '', n: 0}
+                  doc.math.push(math)
+                }
+              }, '']
+            }
+          }
+        }
+
+        const script = document.createElement('script')
+        script.src = '!{url_for(theme.asset.mathjax)}'
+        script.id = 'MathJax-script'
+        script.async = true
+        document.head.appendChild(script)
+      } else {
+        MathJax.startup.document.state(0)
+        MathJax.texReset()
+        MathJax.typesetPromise()
+      }
+    }
+
+    btf.addGlobalFn('encrypt', loadMathjax, 'mathjax')
+    window.pjax ? loadMathjax() : window.addEventListener('load', loadMathjax)
+  })()

themes/butterfly/layout/includes/third-party/math/mermaid.pug

@@ -0,0 +1,51 @@
+script.
+  (() => {
+    const runMermaid = ele => {
+      window.loadMermaid = true
+      const theme = document.documentElement.getAttribute('data-theme') === 'dark' ? '!{theme.mermaid.theme.dark}' : '!{theme.mermaid.theme.light}'
+
+      ele.forEach((item, index) => {
+        const mermaidSrc = item.firstElementChild
+        const mermaidThemeConfig = `%%{init:{ 'theme':'${theme}'}}%%\n`
+        const mermaidID = `mermaid-${index}`
+        const mermaidDefinition = mermaidThemeConfig + mermaidSrc.textContent
+
+        const renderFn = mermaid.render(mermaidID, mermaidDefinition)
+        const renderMermaid = svg => {
+          mermaidSrc.insertAdjacentHTML('afterend', svg)
+        }
+
+        // mermaid v9 and v10 compatibility
+        typeof renderFn === 'string' ? renderMermaid(renderFn) : renderFn.then(({ svg }) => renderMermaid(svg))
+      })
+    }
+
+    const codeToMermaid = () => {
+      const codeMermaidEle = document.querySelectorAll('pre > code.mermaid')
+      if (codeMermaidEle.length === 0) return
+
+      codeMermaidEle.forEach(ele => {
+        const preEle = document.createElement('pre')
+        preEle.className = 'mermaid-src'
+        preEle.hidden = true
+        preEle.textContent = ele.textContent
+        const newEle = document.createElement('div')
+        newEle.className = 'mermaid-wrap'
+        newEle.appendChild(preEle)
+        ele.parentNode.replaceWith(newEle)
+      })
+    }
+
+    const loadMermaid = () => {
+      if (!{theme.mermaid.code_write}) codeToMermaid()
+      const $mermaid = document.querySelectorAll('#article-container .mermaid-wrap')
+      if ($mermaid.length === 0) return
+
+      const runMermaidFn = () => runMermaid($mermaid)
+      btf.addGlobalFn('themeChange', runMermaidFn, 'mermaid')
+      window.loadMermaid ? runMermaidFn() : btf.getScript('!{url_for(theme.asset.mermaid)}').then(runMermaidFn)
+    }
+
+    btf.addGlobalFn('encrypt', loadMermaid, 'mermaid')
+    window.pjax ? loadMermaid() : document.addEventListener('DOMContentLoaded', loadMermaid)
+  })()