Support mermaid in code block diagram and updated all diagram rendering method and styles

10 files changed, 354 insertions, 23 deletions

diff --git a/bower.json b/bower.json
index 0905a873..904e58cd 100644
--- a/bower.json
+++ b/bower.json
@@ -43,6 +43,7 @@
     "markdown-it-mark": "^2.0.0",
     "markdown-it-ins": "^2.0.0",
     "markdown-it-sub": "^1.0.0",
-    "markdown-it-sup": "^1.0.0"
+    "markdown-it-sup": "^1.0.0",
+    "mermaid": "^0.5.8"
   }
 }
diff --git a/public/css/html.min.css b/public/css/html.min.css
index 6fdade24..71ffb470 100644
--- a/public/css/html.min.css
+++ b/public/css/html.min.css
@@ -1 +1 @@
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-1.3em!important;vertical-align:middle;cursor:default!important}.markdown-body{font-family:"Helvetica Neue",Helvetica,Arial,sans-serif;padding-top:40px;padding-bottom:40px;max-width:758px;overflow:visible!important}.markdown-body pre{word-wrap:normal;border:inherit!important}.markdown-body code{color:inherit!important}.markdown-body pre code .wrapper{display:-webkit-inline-flex;display:-moz-inline-flex;display:-ms-inline-flex;display:-o-inline-flex;display:inline-flex}.markdown-body pre code .gutter{float:left;overflow:hidden;-webkit-user-select:none;user-select:none}.markdown-body pre code .gutter.linenumber{text-align:right;position:relative;display:inline-block;cursor:default;z-index:4;padding:0 8px 0 0;min-width:20px;box-sizing:content-box;color:#afafaf!important;border-right:3px solid #6ce26c!important}.markdown-body pre code .gutter.linenumber>span:before{content:attr(data-linenumber)}.markdown-body pre code .code{float:left;margin:0 0 0 1pc}.markdown-body .gist .line-numbers{border-left:none;border-top:none;border-bottom:none}.markdown-body .gist .line-data{border:none}.markdown-body .gist table{border-spacing:0;border-collapse:inherit!important}.markdown-body code[data-gist-id]{background:0 0;padding:0}.ui-user-icon,.vimeo,.youtube{background-position:center center;background-repeat:no-repeat;background-size:contain}.markdown-body code[data-gist-id]:after,.markdown-body code[data-gist-id]:before{content:''}.markdown-body[dir=rtl] pre{direction:ltr}.markdown-body[dir=rtl] code{direction:ltr;unicode-bidi:embed}.markdown-body pre.flow-chart,.markdown-body pre.graphviz,.markdown-body pre.mermaid,.markdown-body pre.sequence-diagram{text-align:center;background-color:inherit;border-radius:0;white-space:inherit}.markdown-body pre.flow-chart>code,.markdown-body pre.graphviz>code,.markdown-body pre.mermaid>code,.markdown-body pre.sequence-diagram>code{text-align:left}.markdown-body pre.flow-chart>svg,.markdown-body pre.graphviz>svg,.markdown-body pre.mermaid>svg,.markdown-body pre.sequence-diagram>svg{max-width:100%;height:100%}.vimeo,.youtube{position:relative;cursor:pointer;display:table;width:100%;text-align:center;background-color:#000;overflow:hidden}.youtube{position:relative;width:100%;padding-bottom:56.25%}.vimeo img{width:100%;object-fit:contain;z-index:0}.youtube img{width:100%;object-fit:cover;z-index:0}.vimeo iframe,.youtube iframe{width:100%;vertical-align:middle;z-index:1}.vimeo .icon,.youtube .icon{position:absolute;height:auto;width:auto;top:50%;left:50%;margin-top:-40px;margin-left:-40px;color:#fff;opacity:.3;-webkit-transition:opacity .2s;transition:opacity .2s;z-index:0}.vimeo:hover .icon,.youtube:hover .icon{opacity:.6;-webkit-transition:opacity .2s;transition:opacity .2s}.slideshare .inner,.speakerdeck .inner{position:relative;width:100%}.slideshare .inner iframe,.speakerdeck .inner iframe{position:absolute;top:0;bottom:0;left:0;right:0;width:100%;height:100%}h1:hover .header-link,h2:hover .header-link,h3:hover .header-link,h4:hover .header-link,h5:hover .header-link,h6:hover .header-link{opacity:1;-webkit-transition:opacity .2s ease-in-out .1s;-moz-transition:opacity .2s ease-in-out .1s;-o-transition:opacity .2s ease-in-out .1s;transition:opacity .2s ease-in-out .1s}.header-link{position:relative;left:.5em;right:.5em;opacity:0;font-size:.8em;-webkit-transition:opacity .2s ease-in-out .1s;-moz-transition:opacity .2s ease-in-out .1s;-o-transition:opacity .2s ease-in-out .1s;transition:opacity .2s ease-in-out .1s}.ui-infobar{max-width:758px;margin-top:25px;margin-bottom:-25px;color:#777}.ui-toc{position:fixed;bottom:20px;z-index:10000}.ui-toc-label{opacity:.3;background-color:#ccc;border:none;-webkit-transition:opacity .2s;transition:opacity .2s}.ui-toc .open .ui-toc-label{opacity:1;color:#fff;-webkit-transition:opacity .2s;transition:opacity .2s}.ui-toc-label:focus{opacity:.3;background-color:#ccc;color:#000}.ui-toc-label:hover{opacity:1;background-color:#ccc;-webkit-transition:opacity .2s;transition:opacity .2s}.ui-toc-dropdown{margin-top:23px;margin-bottom:20px;padding-left:10px;padding-right:10px;max-width:45vw;width:25vw;max-height:65vh;overflow:auto;text-align:inherit}.ui-toc-dropdown[dir=rtl] .nav{padding-right:0;letter-spacing:.0029em}.ui-toc-dropdown a{overflow:hidden;text-overflow:ellipsis;white-space:pre}.ui-toc-dropdown .nav>li>a{display:block;padding:4px 20px;font-size:13px;font-weight:500;color:#767676}.ui-toc-dropdown .nav>li>a:focus,.ui-toc-dropdown .nav>li>a:hover{padding-left:19px;color:#000;text-decoration:none;background-color:transparent;border-left:1px solid #000}.ui-toc-dropdown[dir=rtl] .nav>li>a:focus,.ui-toc-dropdown[dir=rtl] .nav>li>a:hover{padding-right:19px;border-left:none;border-right:1px solid #000}.ui-toc-dropdown .nav>.active:focus>a,.ui-toc-dropdown .nav>.active:hover>a,.ui-toc-dropdown .nav>.active>a{padding-left:18px;font-weight:700;color:#000;background-color:transparent;border-left:2px solid #000}.ui-toc-dropdown[dir=rtl] .nav>.active:focus>a,.ui-toc-dropdown[dir=rtl] .nav>.active:hover>a,.ui-toc-dropdown[dir=rtl] .nav>.active>a{padding-right:18px;border-left:none;border-right:2px solid #000}.ui-toc-dropdown .nav .nav{display:none;padding-bottom:10px}.ui-toc-dropdown .nav>.active>ul,.ui-user-icon{display:block}.ui-toc-dropdown .nav .nav>li>a{padding-top:1px;padding-bottom:1px;padding-left:30px;font-size:9pt;font-weight:400}.ui-toc-dropdown[dir=rtl] .nav .nav>li>a{padding-right:30px}.ui-toc-dropdown .nav .nav>li>ul>li>a{padding-top:1px;padding-bottom:1px;padding-left:40px;font-size:9pt;font-weight:400}.ui-toc-dropdown[dir=rtl] .nav .nav>li>ul>li>a{padding-right:40px}.ui-toc-dropdown .nav .nav>li>a:focus,.ui-toc-dropdown .nav .nav>li>a:hover{padding-left:29px}.ui-toc-dropdown[dir=rtl] .nav .nav>li>a:focus,.ui-toc-dropdown[dir=rtl] .nav .nav>li>a:hover{padding-right:29px}.ui-toc-dropdown .nav .nav>li>ul>li>a:focus,.ui-toc-dropdown .nav .nav>li>ul>li>a:hover{padding-left:39px}.ui-toc-dropdown[dir=rtl] .nav .nav>li>ul>li>a:focus,.ui-toc-dropdown[dir=rtl] .nav .nav>li>ul>li>a:hover{padding-right:39px}.ui-toc-dropdown .nav .nav>.active:focus>a,.ui-toc-dropdown .nav .nav>.active:hover>a,.ui-toc-dropdown .nav .nav>.active>a{padding-left:28px;font-weight:500}.ui-toc-dropdown[dir=rtl] .nav .nav>.active:focus>a,.ui-toc-dropdown[dir=rtl] .nav .nav>.active:hover>a,.ui-toc-dropdown[dir=rtl] .nav .nav>.active>a{padding-right:28px}.ui-toc-dropdown .nav .nav>.active>.nav>.active:focus>a,.ui-toc-dropdown .nav .nav>.active>.nav>.active:hover>a,.ui-toc-dropdown .nav .nav>.active>.nav>.active>a{padding-left:38px;font-weight:500}.ui-toc-dropdown[dir=rtl] .nav .nav>.active>.nav>.active:focus>a,.ui-toc-dropdown[dir=rtl] .nav .nav>.active>.nav>.active:hover>a,.ui-toc-dropdown[dir=rtl] .nav .nav>.active>.nav>.active>a{padding-right:38px}.markdown-body[lang^=ja]{font-family:"Helvetica Neue",Helvetica,Arial,Meiryo,"MS Gothic","ＭＳ ゴシック",sans-serif}.ui-toc-dropdown[lang^=ja]{font-family:"Source Sans Pro",Helvetica,Arial,"Meiryo UI","MS PGothic","ＭＳ Ｐゴシック",sans-serif}.markdown-body[lang=zh-tw]{font-family:"Helvetica Neue",Helvetica,Arial,"Microsoft JhengHei","微軟正黑",sans-serif}.ui-toc-dropdown[lang=zh-tw]{font-family:"Source Sans Pro",Helvetica,Arial,"Microsoft JhengHei UI","微軟正黑UI",sans-serif}.markdown-body[lang=zh-cn]{font-family:"Helvetica Neue",Helvetica,Arial,"Microsoft YaHei","微软雅黑",sans-serif}.ui-toc-dropdown[lang=zh-cn]{font-family:"Source Sans Pro",Helvetica,Arial,"Microsoft YaHei UI","微软雅黑UI",sans-serif}.ui-affix-toc{position:fixed;top:0;max-width:15vw;max-height:70vh;overflow:auto}.back-to-top,.go-to-bottom{display:block;padding:4px 10px;margin-top:10px;margin-left:10px;font-size:9pt;font-weight:500;color:#999}.back-to-top:focus,.back-to-top:hover,.go-to-bottom:focus,.go-to-bottom:hover{color:#563d7c;text-decoration:none}.go-to-bottom{margin-top:0}.ui-user-icon{width:20px;height:20px;border-radius:3px;margin-top:2px;margin-bottom:2px;margin-right:5px}.ui-user-icon.small,small .dropdown{display:inline-block}.ui-user-icon.small{width:18px;height:18px;vertical-align:middle;margin:0 0 .2em}small span{line-height:22px}small .dropdown a:focus,small .dropdown a:hover{text-decoration:none}.unselectable{-moz-user-select:none;-khtml-user-select:none;-webkit-user-select:none;-o-user-select:none;user-select:none}@media print{blockquote,div,img,pre,table{page-break-inside:avoid!important}a[href]:after{font-size:9pt!important}}body{font-smoothing:subpixel-antialiased!important;-webkit-font-smoothing:subpixel-antialiased!important;-moz-osx-font-smoothing:auto!important;text-shadow:1px 1px 1px rgba(0,0,0,.004);-webkit-overflow-scrolling:touch;font-family:"Source Sans Pro",Helvetica,Arial,sans-serif;letter-spacing:.025em}:focus{outline:0!important}::-moz-focus-inner{border:0!important}body.modal-open{overflow-y:auto;padding-right:0!important}
\ No newline at end of file
diff --git a/public/css/index.css b/public/css/index.css
index 17765206..3d45cda3 100644
--- a/public/css/index.css
+++ b/public/css/index.css
@@ -128,7 +128,7 @@ body {
     overflow-y: auto;
 }
 .ui-status * {
-    font-size: 16px;
+    font-size: 16px !important;
 }
 .navbar-brand {
     font-weight: bold;
diff --git a/public/css/markdown.css b/public/css/markdown.css
index f54d163e..aa246918 100644
--- a/public/css/markdown.css
+++ b/public/css/markdown.css
@@ -82,13 +82,6 @@
     content: ''
 }
 
-.markdown-body .sequence-diagram, .markdown-body .flow-chart {
-    text-align: center;
-}
-.markdown-body .flow-chart {
-    margin-bottom: 40px;
-}
-
 /*fixed style for rtl in pre and code*/
 
 .markdown-body[dir='rtl'] pre {
@@ -100,7 +93,27 @@
     unicode-bidi: embed;
 }
 
-svg {
-    width: 100%;
-    max-height: 70vh;
-}
\ No newline at end of file
+.markdown-body pre.flow-chart,
+.markdown-body pre.sequence-diagram,
+.markdown-body pre.graphviz,
+.markdown-body pre.mermaid {
+    text-align: center;
+    background-color: inherit;
+    border-radius: 0;
+    white-space: inherit;
+}
+
+.markdown-body pre.flow-chart > code,
+.markdown-body pre.sequence-diagram > code,
+.markdown-body pre.graphviz > code,
+.markdown-body pre.mermaid > code {
+    text-align: left;
+}
+
+.markdown-body pre.flow-chart > svg,
+.markdown-body pre.sequence-diagram > svg,
+.markdown-body pre.graphviz > svg,
+.markdown-body pre.mermaid > svg {
+    max-width: 100%;
+    height: 100%;
+}
diff --git a/public/css/mermaid.css b/public/css/mermaid.css
new file mode 100644
index 00000000..ac20f140
--- /dev/null
+++ b/public/css/mermaid.css
@@ -0,0 +1,273 @@
+/* Flowchart variables */
+/* Sequence Diagram variables */
+/* Gantt chart variables */
+.mermaid .label {
+  color: #333;
+}
+.mermaid .node rect,
+.mermaid .node circle,
+.mermaid .node ellipse,
+.mermaid .node polygon {
+  fill: #ECECFF;
+  stroke: #CCCCFF;
+  stroke-width: 1px;
+}
+.mermaid .edgePath .path {
+  stroke: #333333;
+}
+.mermaid .edgeLabel {
+  background-color: #e8e8e8;
+}
+.mermaid .cluster rect {
+  fill: #ffffde !important;
+  rx: 4 !important;
+  stroke: #aaaa33 !important;
+  stroke-width: 1px !important;
+}
+.mermaid .cluster text {
+  fill: #333;
+}
+.mermaid .actor {
+  stroke: #CCCCFF;
+  fill: #ECECFF;
+}
+.mermaid text.actor {
+  fill: black;
+  stroke: none;
+}
+.mermaid .actor-line {
+  stroke: grey;
+}
+.mermaid .messageLine0 {
+  stroke-width: 1.5;
+  stroke-dasharray: "2 2";
+  marker-end: "url(#arrowhead)";
+  stroke: #333;
+}
+.mermaid .messageLine1 {
+  stroke-width: 1.5;
+  stroke-dasharray: "2 2";
+  stroke: #333;
+}
+.mermaid #arrowhead {
+  fill: #333;
+}
+.mermaid #crosshead path {
+  fill: #333 !important;
+  stroke: #333 !important;
+}
+.mermaid .messageText {
+  fill: #333;
+  stroke: none;
+}
+.mermaid .labelBox {
+  stroke: #CCCCFF;
+  fill: #ECECFF;
+}
+.mermaid .labelText {
+  fill: black;
+  stroke: none;
+}
+.mermaid .loopText {
+  fill: black;
+  stroke: none;
+}
+.mermaid .loopLine {
+  stroke-width: 2;
+  stroke-dasharray: "2 2";
+  marker-end: "url(#arrowhead)";
+  stroke: #CCCCFF;
+}
+.mermaid .note {
+  stroke: #aaaa33;
+  fill: #fff5ad;
+}
+.mermaid .noteText {
+  fill: black;
+  stroke: none;
+  font-family: 'trebuchet ms', verdana, arial;
+  font-size: 14px;
+}
+/** Section styling */
+.mermaid .section {
+  stroke: none;
+  opacity: 0.2;
+}
+.mermaid .section0 {
+  fill: rgba(102, 102, 255, 0.49);
+}
+.mermaid .section2 {
+  fill: #fff400;
+}
+.mermaid .section1,
+.mermaid .section3 {
+  fill: white;
+  opacity: 0.2;
+}
+.mermaid .sectionTitle0 {
+  fill: #333;
+}
+.mermaid .sectionTitle1 {
+  fill: #333;
+}
+.mermaid .sectionTitle2 {
+  fill: #333;
+}
+.mermaid .sectionTitle3 {
+  fill: #333;
+}
+.mermaid .sectionTitle {
+  text-anchor: start;
+  font-size: 11px;
+  text-height: 14px;
+}
+/* Grid and axis */
+.mermaid .grid .tick {
+  stroke: lightgrey;
+  opacity: 0.3;
+  shape-rendering: crispEdges;
+}
+.mermaid .grid path {
+  stroke-width: 0;
+}
+/* Today line */
+.mermaid .today {
+  fill: none;
+  stroke: red;
+  stroke-width: 2px;
+}
+/* Task styling */
+/* Default task */
+.mermaid .task {
+  stroke-width: 2;
+}
+.mermaid .taskText {
+  text-anchor: middle;
+  font-size: 11px;
+}
+.mermaid .taskTextOutsideRight {
+  fill: black;
+  text-anchor: start;
+  font-size: 11px;
+}
+.mermaid .taskTextOutsideLeft {
+  fill: black;
+  text-anchor: end;
+  font-size: 11px;
+}
+/* Specific task settings for the sections*/
+.mermaid .taskText0,
+.mermaid .taskText1,
+.mermaid .taskText2,
+.mermaid .taskText3 {
+  fill: white;
+}
+.mermaid .task0,
+.mermaid .task1,
+.mermaid .task2,
+.mermaid .task3 {
+  fill: #8a90dd;
+  stroke: #534fbc;
+}
+.mermaid .taskTextOutside0,
+.mermaid .taskTextOutside2 {
+  fill: black;
+}
+.mermaid .taskTextOutside1,
+.mermaid .taskTextOutside3 {
+  fill: black;
+}
+/* Active task */
+.mermaid .active0,
+.mermaid .active1,
+.mermaid .active2,
+.mermaid .active3 {
+  fill: #bfc7ff;
+  stroke: #534fbc;
+}
+.mermaid .activeText0,
+.mermaid .activeText1,
+.mermaid .activeText2,
+.mermaid .activeText3 {
+  fill: black !important;
+}
+/* Completed task */
+.mermaid .done0,
+.mermaid .done1,
+.mermaid .done2,
+.mermaid .done3 {
+  stroke: grey;
+  fill: lightgrey;
+  stroke-width: 2;
+}
+.mermaid .doneText0,
+.mermaid .doneText1,
+.mermaid .doneText2,
+.mermaid .doneText3 {
+  fill: black !important;
+}
+/* Tasks on the critical line */
+.mermaid .crit0,
+.mermaid .crit1,
+.mermaid .crit2,
+.mermaid .crit3 {
+  stroke: #ff8888;
+  fill: red;
+  stroke-width: 2;
+}
+.mermaid .activeCrit0,
+.mermaid .activeCrit1,
+.mermaid .activeCrit2,
+.mermaid .activeCrit3 {
+  stroke: #ff8888;
+  fill: #bfc7ff;
+  stroke-width: 2;
+}
+.mermaid .doneCrit0,
+.mermaid .doneCrit1,
+.mermaid .doneCrit2,
+.mermaid .doneCrit3 {
+  stroke: #ff8888;
+  fill: lightgrey;
+  stroke-width: 2;
+  cursor: pointer;
+  shape-rendering: crispEdges;
+}
+.mermaid .doneCritText0,
+.mermaid .doneCritText1,
+.mermaid .doneCritText2,
+.mermaid .doneCritText3 {
+  fill: black !important;
+}
+.mermaid .activeCritText0,
+.mermaid .activeCritText1,
+.mermaid .activeCritText2,
+.mermaid .activeCritText3 {
+  fill: black !important;
+}
+.mermaid .titleText {
+  text-anchor: middle;
+  font-size: 18px;
+  fill: black;
+}
+/*
+
+
+*/
+.mermaid .node text {
+  font-family: 'trebuchet ms', verdana, arial;
+  font-size: 14px;
+}
+.mermaid div.mermaidTooltip {
+  position: absolute;
+  text-align: center;
+  max-width: 200px;
+  padding: 2px;
+  font-family: 'trebuchet ms', verdana, arial;
+  font-size: 12px;
+  background: #ffffde;
+  border: 1px solid #aaaa33;
+  border-radius: 2px;
+  pointer-events: none;
+  z-index: 100;
+}
diff --git a/public/js/extra.js b/public/js/extra.js
index 1752eb5b..dc3eac3e 100644
--- a/public/js/extra.js
+++ b/public/js/extra.js
@@ -220,11 +220,16 @@ function finishView(view) {
     var sequences = view.find(".sequence-diagram.raw").removeClass("raw");
     sequences.each(function (key, value) {
         try {
-            var sequence = $(value);
+            var $value = $(value);
+            var $ele = $(value).parent().parent();
+            
+            var sequence = $value;
             sequence.sequenceDiagram({
                 theme: 'simple'
             });
-            sequence.parent().parent().replaceWith(sequence);
+            
+            $ele.addClass('sequence-diagram');
+            $value.children().unwrap().unwrap();
         } catch (err) {
             console.warn(err);
         }
@@ -233,15 +238,20 @@ function finishView(view) {
     var flow = view.find(".flow-chart.raw").removeClass("raw");
     flow.each(function (key, value) {
         try {
-            var chart = flowchart.parse($(value).text());
-            $(value).html('');
+            var $value = $(value);
+            var $ele = $(value).parent().parent();
+            
+            var chart = flowchart.parse($value.text());
+            $value.html('');
             chart.drawSVG(value, {
                 'line-width': 2,
                 'fill': 'none',
                 'font-size': '16px',
                 'font-family': "'Andale Mono', monospace"
             });
-            $(value).parent().parent().replaceWith(value);
+            
+            $ele.addClass('flow-chart');
+            $value.children().unwrap().unwrap();
         } catch (err) {
             console.warn(err);
         }
@@ -250,9 +260,37 @@ function finishView(view) {
     var graphvizs = view.find(".graphviz.raw").removeClass("raw");
     graphvizs.each(function (key, value) {
         try {
-            var graphviz = Viz($(value).text());
-            $(value).html(graphviz);
-            $(value).parent().parent().replaceWith(value);
+            var $value = $(value);
+            var $ele = $(value).parent().parent();
+            
+            var graphviz = Viz($value.text());
+            $value.html(graphviz);
+            
+            $ele.addClass('graphviz');
+            $value.children().unwrap().unwrap();
+        } catch (err) {
+            console.warn(err);
+        }
+    });
+    //mermaid
+    var mermaids = view.find(".mermaid.raw").removeClass("raw");
+    mermaids.each(function (key, value) {
+        try {
+            var $value = $(value);
+            var $ele = $(value).parent().parent();
+            
+            var mermaidError = null;
+            mermaid.parseError = function (err, hash) {
+                mermaidError = err;
+            };
+            
+            if (mermaidAPI.parse($value.text())) {
+                $ele.addClass('mermaid');
+                $ele.html($value.text());
+                mermaid.init(undefined, $ele);
+            } else {
+                console.warn(mermaidError);
+            }
         } catch (err) {
             console.warn(err);
         }
@@ -633,6 +671,8 @@ function highlightRender(code, lang) {
         return '<div class="flow-chart raw">' + code + '</div>';
     } else if (lang == 'graphviz') {
         return '<div class="graphviz raw">' + code + '</div>';
+    } else if (lang == 'mermaid') {
+        return '<div class="mermaid raw">' + code + '</div>';
     }
     var reallang = lang.replace(/\=$|\=\d+$|\=\+$/, '');
     var languages = hljs.listLanguages();
diff --git a/public/js/index.js b/public/js/index.js
index fd85d6db..4625af05 100644
--- a/public/js/index.js
+++ b/public/js/index.js
@@ -56,7 +56,7 @@ var cursorMenuThrottle = 100;
 var cursorActivityDebounce = 50;
 var cursorAnimatePeriod = 100;
 var supportCodeModes = ['javascript', 'htmlmixed', 'htmlembedded', 'css', 'xml', 'clike', 'clojure', 'ruby', 'python', 'shell', 'php', 'sql', 'coffeescript', 'yaml', 'jade', 'lua', 'cmake', 'nginx', 'perl', 'sass', 'r', 'dockerfile'];
-var supportCharts = ['sequence', 'flow', 'graphviz'];
+var supportCharts = ['sequence', 'flow', 'graphviz', 'mermaid'];
 var supportHeaders = [
     {
         text: '# h1',
diff --git a/public/views/foot.ejs b/public/views/foot.ejs
index 48761d0f..06c194bd 100644
--- a/public/views/foot.ejs
+++ b/public/views/foot.ejs
@@ -50,6 +50,7 @@
 <script src="<%- url %>/vendor/sequence-diagrams/sequence-diagram-min.js" defer></script>
 <script src="<%- url %>/vendor/flowchart/release/flowchart.min.js" defer></script>
 <script src="<%- url %>/vendor/viz.js/viz.js" defer></script>
+<script src="<%- url %>/vendor/mermaid/dist/mermaid.min.js" defer></script>
 <script src="<%- url %>/vendor/FileSaver.min.js" defer></script>
 <script src="<%- url %>/vendor/store.min.js" defer></script>
 <script src="<%- url %>/vendor/js-url/url.min.js" defer></script>
diff --git a/public/views/head.ejs b/public/views/head.ejs
index 17a4a8fb..a00c2e2b 100644
--- a/public/views/head.ejs
+++ b/public/views/head.ejs
@@ -32,6 +32,7 @@
 <link rel="stylesheet" href="<%- url %>/vendor/highlight-js/github-gist.min.css">
 <link rel="stylesheet" href="<%- url %>/vendor/emojify/css/emojify.min.css">
 <link rel="stylesheet" href="<%- url %>/vendor/showup/showup.css">
+<link rel="stylesheet" href="<%- url %>/css/mermaid.css">
 <link rel="stylesheet" href="<%- url %>/css/markdown.css">
 <link rel="stylesheet" href="<%- url %>/css/index.css">
 <link rel="stylesheet" href="<%- url %>/css/extra.css">
diff --git a/public/views/pretty.ejs b/public/views/pretty.ejs
index 9dd61d7d..d21ec612 100644
--- a/public/views/pretty.ejs
+++ b/public/views/pretty.ejs
@@ -24,6 +24,7 @@
     <link rel="stylesheet" href='<%- url %>/css/github-extract.css'>
     <link rel="stylesheet" href='<%- url %>/css/gist.css'>
     <link rel="stylesheet" href='<%- url %>/vendor/highlight-js/github-gist.min.css'>
+    <link rel="stylesheet" href="<%- url %>/css/mermaid.css">
     <link rel="stylesheet" href='<%- url %>/css/markdown.css'>
     <link rel="stylesheet" href='<%- url %>/vendor/emojify/css/emojify.min.css'>
     <link rel="stylesheet" href='<%- url %>/css/extra.css'>
@@ -98,6 +99,7 @@
 <script src="<%- url %>/vendor/sequence-diagrams/sequence-diagram-min.js" defer></script>
 <script src="<%- url %>/vendor/flowchart/release/flowchart.min.js" defer></script>
 <script src="<%- url %>/vendor/viz.js/viz.js" defer></script>
+<script src="<%- url %>/vendor/mermaid/dist/mermaid.min.js" defer></script>
 <script src="<%- url %>/vendor/md-toc.js" defer></script>
 <script type="text/x-mathjax-config">
     MathJax.Hub.Config({ messageStyle: "none", skipStartupTypeset: true ,tex2jax: {inlineMath: [['$','$'], ['\\(','\\)']], processEscapes: true }});