From edfb80daac383da8a615bb2ac6e39a5b7a69d1b6 Mon Sep 17 00:00:00 2001
From: andreimarcu <andrei@marcu.net>
Date: Wed, 7 Oct 2015 15:00:42 -0400
Subject: [PATCH] Markdown display handler. Fixes #33

---
 display.go                     |  18 +
 static/css/github-markdown.css | 650 +++++++++++++++++++++++++++++++++
 templates.go                   |   1 +
 templates/display/md.html      |  11 +
 4 files changed, 680 insertions(+)
 create mode 100644 static/css/github-markdown.css
 create mode 100644 templates/display/md.html

diff --git a/display.go b/display.go
index b966077..f21096f 100644
--- a/display.go
+++ b/display.go
@@ -14,6 +14,8 @@ import (
 	"bitbucket.org/taruti/mimemagic"
 	"github.com/dustin/go-humanize"
 	"github.com/flosch/pongo2"
+	"github.com/microcosm-cc/bluemonday"
+	"github.com/russross/blackfriday"
 	"github.com/zenazn/goji/web"
 )
 
@@ -80,6 +82,22 @@ func fileDisplayHandler(c web.C, w http.ResponseWriter, r *http.Request) {
 		} else {
 			tpl = Templates["display/file.html"]
 		}
+	} else if extension == "md" {
+		if fileInfo.Size() < maxDisplayFileSizeBytes {
+			bytes, err := ioutil.ReadFile(filePath)
+			if err != nil {
+				tpl = Templates["display/file.html"]
+			} else {
+				unsafe := blackfriday.MarkdownCommon(bytes)
+				html := bluemonday.UGCPolicy().SanitizeBytes(unsafe)
+
+				extra["contents"] = string(html)
+				tpl = Templates["display/md.html"]
+			}
+		} else {
+			tpl = Templates["display/file.html"]
+		}
+
 	} else {
 		tpl = Templates["display/file.html"]
 	}
diff --git a/static/css/github-markdown.css b/static/css/github-markdown.css
new file mode 100644
index 0000000..8072b54
--- /dev/null
+++ b/static/css/github-markdown.css
@@ -0,0 +1,650 @@
+/* from https://github.com/sindresorhus/github-markdown-css/ */
+
+.markdown-body {
+  -webkit-text-size-adjust: 100%;
+  text-size-adjust: 100%;
+  color: #333;
+  font-family: "Helvetica Neue", Helvetica, "Segoe UI", Arial, freesans, sans-serif;
+  font-size: 12px;
+  line-height: 1.6;
+  word-wrap: break-word;
+  width: 680px;
+  padding: 10px;
+}
+
+.markdown-body a {
+  background-color: transparent;
+}
+
+.markdown-body a:active,
+.markdown-body a:hover {
+  outline: 0;
+}
+
+.markdown-body strong {
+  font-weight: bold;
+}
+
+.markdown-body h1 {
+  font-size: 2em;
+  margin: 0.67em 0;
+}
+
+.markdown-body img {
+  border: 0;
+}
+
+.markdown-body hr {
+  box-sizing: content-box;
+  height: 0;
+}
+
+.markdown-body pre {
+  overflow: auto;
+}
+
+.markdown-body code,
+.markdown-body kbd,
+.markdown-body pre {
+  font-family: monospace, monospace;
+  font-size: 1em;
+}
+
+.markdown-body input {
+  color: inherit;
+  font: inherit;
+  margin: 0;
+}
+
+.markdown-body html input[disabled] {
+  cursor: default;
+}
+
+.markdown-body input {
+  line-height: normal;
+}
+
+.markdown-body input[type="checkbox"] {
+  box-sizing: border-box;
+  padding: 0;
+}
+
+.markdown-body table {
+  border-collapse: collapse;
+  border-spacing: 0;
+}
+
+.markdown-body td,
+.markdown-body th {
+  padding: 0;
+}
+
+.markdown-body * {
+  box-sizing: border-box;
+}
+
+.markdown-body input {
+  font: 13px/1.4 Helvetica, arial, nimbussansl, liberationsans, freesans, clean, sans-serif, "Segoe UI Emoji", "Segoe UI Symbol";
+}
+
+.markdown-body a {
+  color: #4078c0;
+  text-decoration: none;
+}
+
+.markdown-body a:hover,
+.markdown-body a:active {
+  text-decoration: underline;
+}
+
+.markdown-body hr {
+  height: 0;
+  margin: 15px 0;
+  overflow: hidden;
+  background: transparent;
+  border: 0;
+  border-bottom: 1px solid #ddd;
+}
+
+.markdown-body hr:before {
+  display: table;
+  content: "";
+}
+
+.markdown-body hr:after {
+  display: table;
+  clear: both;
+  content: "";
+}
+
+.markdown-body h1,
+.markdown-body h2,
+.markdown-body h3,
+.markdown-body h4,
+.markdown-body h5,
+.markdown-body h6 {
+  margin-top: 15px;
+  margin-bottom: 15px;
+  line-height: 1.1;
+}
+
+.markdown-body h1 {
+  font-size: 30px;
+}
+
+.markdown-body h2 {
+  font-size: 21px;
+}
+
+.markdown-body h3 {
+  font-size: 16px;
+}
+
+.markdown-body h4 {
+  font-size: 14px;
+}
+
+.markdown-body h5 {
+  font-size: 12px;
+}
+
+.markdown-body h6 {
+  font-size: 11px;
+}
+
+.markdown-body blockquote {
+  margin: 0;
+}
+
+.markdown-body ul,
+.markdown-body ol {
+  padding: 0;
+  margin-top: 0;
+  margin-bottom: 0;
+}
+
+.markdown-body ol ol,
+.markdown-body ul ol {
+  list-style-type: lower-roman;
+}
+
+.markdown-body ul ul ol,
+.markdown-body ul ol ol,
+.markdown-body ol ul ol,
+.markdown-body ol ol ol {
+  list-style-type: lower-alpha;
+}
+
+.markdown-body dd {
+  margin-left: 0;
+}
+
+.markdown-body code {
+  font-family: Consolas, "Liberation Mono", Menlo, Courier, monospace;
+  font-size: 12px;
+}
+
+.markdown-body pre {
+  margin-top: 0;
+  margin-bottom: 0;
+  font: 12px Consolas, "Liberation Mono", Menlo, Courier, monospace;
+}
+
+.markdown-body .select::-ms-expand {
+  opacity: 0;
+}
+
+.markdown-body .octicon {
+  font: normal normal normal 16px/1 octicons-anchor;
+  display: inline-block;
+  text-decoration: none;
+  text-rendering: auto;
+  -webkit-font-smoothing: antialiased;
+  -moz-osx-font-smoothing: grayscale;
+  -webkit-user-select: none;
+  -moz-user-select: none;
+  -ms-user-select: none;
+  user-select: none;
+}
+
+.markdown-body .octicon-link:before {
+  content: '\f05c';
+}
+
+.markdown-body>*:first-child {
+  margin-top: 0 !important;
+}
+
+.markdown-body>*:last-child {
+  margin-bottom: 0 !important;
+}
+
+.markdown-body a:not([href]) {
+  color: inherit;
+  text-decoration: none;
+}
+
+.markdown-body .anchor {
+  position: absolute;
+  top: 0;
+  left: 0;
+  display: block;
+  padding-right: 6px;
+  padding-left: 30px;
+  margin-left: -30px;
+}
+
+.markdown-body .anchor:focus {
+  outline: none;
+}
+
+.markdown-body h1,
+.markdown-body h2,
+.markdown-body h3,
+.markdown-body h4,
+.markdown-body h5,
+.markdown-body h6 {
+  position: relative;
+  margin-top: 1em;
+  margin-bottom: 16px;
+  font-weight: bold;
+  line-height: 1.4;
+}
+
+.markdown-body h1 .octicon-link,
+.markdown-body h2 .octicon-link,
+.markdown-body h3 .octicon-link,
+.markdown-body h4 .octicon-link,
+.markdown-body h5 .octicon-link,
+.markdown-body h6 .octicon-link {
+  display: none;
+  color: #000;
+  vertical-align: middle;
+}
+
+.markdown-body h1:hover .anchor,
+.markdown-body h2:hover .anchor,
+.markdown-body h3:hover .anchor,
+.markdown-body h4:hover .anchor,
+.markdown-body h5:hover .anchor,
+.markdown-body h6:hover .anchor {
+  padding-left: 8px;
+  margin-left: -30px;
+  text-decoration: none;
+}
+
+.markdown-body h1:hover .anchor .octicon-link,
+.markdown-body h2:hover .anchor .octicon-link,
+.markdown-body h3:hover .anchor .octicon-link,
+.markdown-body h4:hover .anchor .octicon-link,
+.markdown-body h5:hover .anchor .octicon-link,
+.markdown-body h6:hover .anchor .octicon-link {
+  display: inline-block;
+}
+
+.markdown-body h1 {
+  padding-bottom: 0.3em;
+  font-size: 2.25em;
+  line-height: 1.2;
+  border-bottom: 1px solid #eee;
+}
+
+.markdown-body h1 .anchor {
+  line-height: 1;
+}
+
+.markdown-body h2 {
+  padding-bottom: 0.3em;
+  font-size: 1.75em;
+  line-height: 1.225;
+  border-bottom: 1px solid #eee;
+}
+
+.markdown-body h2 .anchor {
+  line-height: 1;
+}
+
+.markdown-body h3 {
+  font-size: 1.5em;
+  line-height: 1.43;
+}
+
+.markdown-body h3 .anchor {
+  line-height: 1.2;
+}
+
+.markdown-body h4 {
+  font-size: 1.25em;
+}
+
+.markdown-body h4 .anchor {
+  line-height: 1.2;
+}
+
+.markdown-body h5 {
+  font-size: 1em;
+}
+
+.markdown-body h5 .anchor {
+  line-height: 1.1;
+}
+
+.markdown-body h6 {
+  font-size: 1em;
+  color: #777;
+}
+
+.markdown-body h6 .anchor {
+  line-height: 1.1;
+}
+
+.markdown-body p,
+.markdown-body blockquote,
+.markdown-body ul,
+.markdown-body ol,
+.markdown-body dl,
+.markdown-body table,
+.markdown-body pre {
+  margin-top: 0;
+  margin-bottom: 16px;
+}
+
+.markdown-body hr {
+  height: 4px;
+  padding: 0;
+  margin: 16px 0;
+  background-color: #e7e7e7;
+  border: 0 none;
+}
+
+.markdown-body ul,
+.markdown-body ol {
+  padding-left: 2em;
+}
+
+.markdown-body ul ul,
+.markdown-body ul ol,
+.markdown-body ol ol,
+.markdown-body ol ul {
+  margin-top: 0;
+  margin-bottom: 0;
+}
+
+.markdown-body li>p {
+  margin-top: 16px;
+}
+
+.markdown-body dl {
+  padding: 0;
+}
+
+.markdown-body dl dt {
+  padding: 0;
+  margin-top: 16px;
+  font-size: 1em;
+  font-style: italic;
+  font-weight: bold;
+}
+
+.markdown-body dl dd {
+  padding: 0 16px;
+  margin-bottom: 16px;
+}
+
+.markdown-body blockquote {
+  padding: 0 15px;
+  color: #777;
+  border-left: 4px solid #ddd;
+}
+
+.markdown-body blockquote>:first-child {
+  margin-top: 0;
+}
+
+.markdown-body blockquote>:last-child {
+  margin-bottom: 0;
+}
+
+.markdown-body table {
+  display: block;
+  width: 100%;
+  overflow: auto;
+  word-break: normal;
+  word-break: keep-all;
+}
+
+.markdown-body table th {
+  font-weight: bold;
+}
+
+.markdown-body table th,
+.markdown-body table td {
+  padding: 6px 13px;
+  border: 1px solid #ddd;
+}
+
+.markdown-body table tr {
+  background-color: #fff;
+  border-top: 1px solid #ccc;
+}
+
+.markdown-body table tr:nth-child(2n) {
+  background-color: #f8f8f8;
+}
+
+.markdown-body img {
+  max-width: 100%;
+  box-sizing: border-box;
+}
+
+.markdown-body code {
+  padding: 0;
+  padding-top: 0.2em;
+  padding-bottom: 0.2em;
+  margin: 0;
+  font-size: 85%;
+  background-color: rgba(0,0,0,0.04);
+  border-radius: 3px;
+}
+
+.markdown-body code:before,
+.markdown-body code:after {
+  letter-spacing: -0.2em;
+  content: "\00a0";
+}
+
+.markdown-body pre>code {
+  padding: 0;
+  margin: 0;
+  font-size: 100%;
+  word-break: normal;
+  white-space: pre;
+  background: transparent;
+  border: 0;
+}
+
+.markdown-body .highlight {
+  margin-bottom: 16px;
+}
+
+.markdown-body .highlight pre,
+.markdown-body pre {
+  padding: 16px;
+  overflow: auto;
+  font-size: 85%;
+  line-height: 1.45;
+  background-color: #f7f7f7;
+  border-radius: 3px;
+}
+
+.markdown-body .highlight pre {
+  margin-bottom: 0;
+  word-break: normal;
+}
+
+.markdown-body pre {
+  word-wrap: normal;
+}
+
+.markdown-body pre code {
+  display: inline;
+  max-width: initial;
+  padding: 0;
+  margin: 0;
+  overflow: initial;
+  line-height: inherit;
+  word-wrap: normal;
+  background-color: transparent;
+  border: 0;
+}
+
+.markdown-body pre code:before,
+.markdown-body pre code:after {
+  content: normal;
+}
+
+.markdown-body kbd {
+  display: inline-block;
+  padding: 3px 5px;
+  font-size: 11px;
+  line-height: 10px;
+  color: #555;
+  vertical-align: middle;
+  background-color: #fcfcfc;
+  border: solid 1px #ccc;
+  border-bottom-color: #bbb;
+  border-radius: 3px;
+  box-shadow: inset 0 -1px 0 #bbb;
+}
+
+.markdown-body .pl-c {
+  color: #969896;
+}
+
+.markdown-body .pl-c1,
+.markdown-body .pl-s .pl-v {
+  color: #0086b3;
+}
+
+.markdown-body .pl-e,
+.markdown-body .pl-en {
+  color: #795da3;
+}
+
+.markdown-body .pl-s .pl-s1,
+.markdown-body .pl-smi {
+  color: #333;
+}
+
+.markdown-body .pl-ent {
+  color: #63a35c;
+}
+
+.markdown-body .pl-k {
+  color: #a71d5d;
+}
+
+.markdown-body .pl-pds,
+.markdown-body .pl-s,
+.markdown-body .pl-s .pl-pse .pl-s1,
+.markdown-body .pl-sr,
+.markdown-body .pl-sr .pl-cce,
+.markdown-body .pl-sr .pl-sra,
+.markdown-body .pl-sr .pl-sre {
+  color: #183691;
+}
+
+.markdown-body .pl-v {
+  color: #ed6a43;
+}
+
+.markdown-body .pl-id {
+  color: #b52a1d;
+}
+
+.markdown-body .pl-ii {
+  background-color: #b52a1d;
+  color: #f8f8f8;
+}
+
+.markdown-body .pl-sr .pl-cce {
+  color: #63a35c;
+  font-weight: bold;
+}
+
+.markdown-body .pl-ml {
+  color: #693a17;
+}
+
+.markdown-body .pl-mh,
+.markdown-body .pl-mh .pl-en,
+.markdown-body .pl-ms {
+  color: #1d3e81;
+  font-weight: bold;
+}
+
+.markdown-body .pl-mq {
+  color: #008080;
+}
+
+.markdown-body .pl-mi {
+  color: #333;
+  font-style: italic;
+}
+
+.markdown-body .pl-mb {
+  color: #333;
+  font-weight: bold;
+}
+
+.markdown-body .pl-md {
+  background-color: #ffecec;
+  color: #bd2c00;
+}
+
+.markdown-body .pl-mi1 {
+  background-color: #eaffea;
+  color: #55a532;
+}
+
+.markdown-body .pl-mdr {
+  color: #795da3;
+  font-weight: bold;
+}
+
+.markdown-body .pl-mo {
+  color: #1d3e81;
+}
+
+.markdown-body kbd {
+  display: inline-block;
+  padding: 3px 5px;
+  font: 11px Consolas, "Liberation Mono", Menlo, Courier, monospace;
+  line-height: 10px;
+  color: #555;
+  vertical-align: middle;
+  background-color: #fcfcfc;
+  border: solid 1px #ccc;
+  border-bottom-color: #bbb;
+  border-radius: 3px;
+  box-shadow: inset 0 -1px 0 #bbb;
+}
+
+.markdown-body .task-list-item {
+  list-style-type: none;
+}
+
+.markdown-body .task-list-item+.task-list-item {
+  margin-top: 3px;
+}
+
+.markdown-body .task-list-item input {
+  margin: 0 0.35em 0.25em -1.6em;
+  vertical-align: middle;
+}
+
+.markdown-body :checked+.radio-label {
+  z-index: 1;
+  position: relative;
+  border-color: #4078c0;
+}
diff --git a/templates.go b/templates.go
index eb2997d..78c7215 100644
--- a/templates.go
+++ b/templates.go
@@ -53,6 +53,7 @@ func populateTemplatesMap(tSet *pongo2.TemplateSet, tMap map[string]*pongo2.Temp
 		"display/video.html",
 		"display/pdf.html",
 		"display/bin.html",
+		"display/md.html",
 		"display/file.html",
 	}
 
diff --git a/templates/display/md.html b/templates/display/md.html
new file mode 100644
index 0000000..a0d19a1
--- /dev/null
+++ b/templates/display/md.html
@@ -0,0 +1,11 @@
+{% extends "base.html" %}
+
+{% block head %}
+<link href="/static/css/github-markdown.css" rel="stylesheet" type="text/css">
+{% endblock %}
+
+{% block main %}
+<div class="normal markdown-body">
+	{{ extra.contents|safe }}
+</div>
+{% endblock %}