1 files changed, 74 insertions, 0 deletions
diff --git a/plugins/ghmarkdown.lua b/plugins/ghmarkdown.lua
new file mode 100644
index 0000000..b49e248
--- /dev/null
+++ b/plugins/ghmarkdown.lua
@@ -0,0 +1,74 @@
+local core = require "core"
+local command = require "core.command"
+local keymap = require "core.keymap"
+
+
+local html = [[
+<html>
+  <style>
+    body {
+      margin:80 auto 100 auto;
+      max-width: 750px;
+      line-height: 1.6;
+      font-family: Open Sans, Arial;
+      color: #444;
+      padding: 0 10px;
+    }
+    h1, h2, h3 { line-height: 1.2; padding-top: 14px; }
+    hr { border: 0px; border-top: 1px solid #ddd; }
+    code, pre { background: #f3f3f3; padding: 8px; }
+    code { padding: 4px; }
+    a { text-decoration: none; color: #0366d6; }
+    a:hover { text-decoration: underline; }
+    table { border-collapse: collapse; }
+    table, th, td { border: 1px solid #ddd; padding: 6px; }
+  </style>
+  <head>
+    <title>${title}</title>
+  <head>
+  <body>
+    <script>
+      var xhr = new XMLHttpRequest;
+      xhr.open("POST", "https://api.github.com/markdown/raw");
+      xhr.setRequestHeader("Content-Type", "text/plain");
+      xhr.onload = function() { document.body.innerHTML = xhr.responseText; };
+      xhr.send("${content}");
+    </script>
+  </body>
+</html>
+]]
+
+
+command.add("core.docview", {
+  ["ghmarkdown:show-preview"] = function()
+    local dv = core.active_view
+
+    local content = dv.doc:get_text(1, 1, math.huge, math.huge)
+    local esc = { ['"'] = '\\"', ["\n"] = '\\n' }
+    local text = html:gsub("${(.-)}", {
+      title = dv:get_name(),
+      content = content:gsub(".", esc)
+    })
+
+    local htmlfile = ".lite_ghmarkdown_" .. os.tmpname():gsub("%W", "") .. ".html"
+    local fp = io.open(htmlfile, "w")
+    fp:write(text)
+    fp:close()
+
+    core.log("Opening markdown preview for \"%s\"", dv:get_name())
+    local path = system.absolute_path(".") .. "/" .. htmlfile
+    if PLATFORM == "Windows" then
+      system.exec("start " .. path)
+    else
+      system.exec(string.format("xdg-open %q", path))
+    end
+
+    core.add_thread(function()
+      coroutine.yield(5)
+      os.remove(htmlfile)
+    end)
+  end
+})
+
+
+keymap.add { ["ctrl+shift+m"] = "ghmarkdown:show-preview" }