add attributes to fence blocks

browser/components/MarkdownPreview.js

@@ -738,10 +738,17 @@ export default class MarkdownPreview extends React.Component {
         try {
           const chartConfig = JSON.parse(el.innerHTML)
           el.innerHTML = ''
-          var canvas = document.createElement('canvas')
+
+          const canvas = document.createElement('canvas')
           el.appendChild(canvas)
-          /* eslint-disable no-new */
-          new Chart(canvas, chartConfig)
+
+          const height = el.attributes.getNamedItem('data-height')
+          if (height && height.value !== 'undefined') {
+            el.style.height = height.value + 'vh'
+            canvas.height = height.value + 'vh'
+          }
+
+          const chart = new Chart(canvas, chartConfig)
         } catch (e) {
           console.error(e)
           el.className = 'chart-error'

browser/components/markdown.styl

@@ -213,10 +213,12 @@ pre
   margin 0 0 1em
   display flex
   line-height 1.4em
-  &.flowchart, &.sequence, &.chart
-    display flex
-    justify-content center
-    background-color white
+  code
+    background-color inherit
+    margin 0
+    padding 0
+    border none
+    border-radius 0
   &.CodeMirror
     height initial
     flex-wrap wrap
@@ -230,12 +232,12 @@ pre
     border none
     border-radius 0
   &>span.filename
-    width 100%
-    border-radius: 5px 0px 0px 0px
-    margin -8px 100% 8px -8px
-    padding 0px 6px
+    margin -8px -7px 8px -8px
+    padding 2px 6px
     background-color #777;
     color white
+    &:empty
+      display none
   &>span.lineNumber
     display none
     font-size 1em
@@ -361,7 +363,7 @@ for name, val in admonition_types
     .admonition.{name}
         @extend $admonition
         border-left-color: val[color]
-    
+
     .admonition.{name}>.admonition-title
         @extend $admonition-title
         border-bottom-color: .1rem solid rgba(val[color], 0.2)
@@ -372,6 +374,18 @@ for name, val in admonition_types
         color: val[color]
         content: val[icon]
 
+pre.fence
+  flex-direction column
+
+  .chart, .flowchart, .mermaid, .sequence
+    display flex
+    justify-content center
+    background-color white
+    max-width 100%
+
+    canvas, svg
+      max-width 100% !important
+
 themeDarkBackground = darken(#21252B, 10%)
 themeDarkText = #f9f9f9
 themeDarkBorder = lighten(themeDarkBackground, 20%)

browser/components/render/MermaidRender.js

@@ -2,8 +2,8 @@ import mermaidAPI from 'mermaid'
 
 // fixes bad styling in the mermaid dark theme
 const darkThemeStyling = `
-.loopText tspan { 
-  fill: white; 
+.loopText tspan {
+  fill: white;
 }`
 
 function getRandomInt (min, max) {
@@ -11,9 +11,9 @@ function getRandomInt (min, max) {
 }
 
 function getId () {
-  var pool = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789'
-  var id = 'm-'
-  for (var i = 0; i < 7; i++) {
+  const pool = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789'
+  let id = 'm-'
+  for (let i = 0; i < 7; i++) {
     id += pool[getRandomInt(0, 16)]
   }
   return id
@@ -21,14 +21,18 @@ function getId () {
 
 function render (element, content, theme) {
   try {
+    const height = element.attributes.getNamedItem('data-height')
+    if (height && height.value !== 'undefined') {
+      element.style.height = height.value + 'vh'
+    }
     let isDarkTheme = theme === 'dark' || theme === 'solarized-dark' || theme === 'monokai'
     mermaidAPI.initialize({
       theme: isDarkTheme ? 'dark' : 'default',
-      themeCSS: isDarkTheme ? darkThemeStyling : ''
+      themeCSS: isDarkTheme ? darkThemeStyling : '',
+      useMaxWidth: false
     })
     mermaidAPI.render(getId(), content, (svgGraph) => {
       element.innerHTML = svgGraph
-      element.style.height = element.attributes.getNamedItem('data-height').value + 'vh'
     })
   } catch (e) {
     console.error(e)