Add markdown preview; fix bug with deleted editor

app/assets/javascripts/app.js

@@ -40,6 +40,7 @@ $(function(){
       $(this).parent().attr("lang", "(language unknown)");
     }
   });
+
   updateTimestamps();
   setInterval(updateTimestamps, 1000*10);
 });

app/assets/javascripts/application.js

@@ -12,5 +12,6 @@
 //= require jquery
 //= require jquery_ujs
 //= require app
+//= require editor
 //= require ago
-//= require highlight
+//= require highlight

app/assets/javascripts/editor.js

@@ -0,0 +1,55 @@
+$(function() {
+
+  $('.md_editor .field_container .preview-button').click(function() {
+    if ($(this).data('preview') == 'true') {
+      edit($(this));
+    } else {
+      preview($(this));
+    }
+  });
+
+  function edit(target) {
+    target.data('preview', 'false');
+    target.text('Preview');
+    target.parent().find('.preview').hide();
+    target.parent().find('.editor_field').show();
+  }
+
+  function preview(target) {
+    target.data('preview', 'true');
+    target.text('Edit');
+    var prev   = target.parent().find('.preview');
+    var editor = target.parent().find('.editor_field')
+    prev.html("<i>(Loading ...)</i>");
+    prev.show();
+    editor.hide()
+    if (target.parent().parent().hasClass('mini')) {
+      var url = '/tools/render_mini_markdown';
+    } else {
+      var url = '/tools/render_markdown';
+    }
+    $.ajax(url, {
+      type: 'post',
+      data: {text: editor.val()},
+      dataType: 'html',
+      headers: {
+        'X-CSRF-Token': $('meta[name="csrf-token"]').attr('content')
+      },
+      success: function(data) {
+        prev.html(data);
+        prev.find('pre code').each(function(i, e) {
+          if ($(this).attr("class")) {
+            $(this).parent().attr("lang", $(this).attr("class").replace("hljs", "").trim());
+          } else {
+            $(this).parent().attr("lang", "(language unknown)");
+          }
+          hljs.highlightBlock(e);
+        });
+      },
+      error: function(xhr, status, err) {
+        prev.html('<i>(Error: ' + status + ')</i><br>' + err);
+      }
+    });
+  }
+
+});

app/assets/stylesheets/style.css.scss

@@ -216,7 +216,7 @@ span.no-about {
   display: block;
 }
 
-.post, .thread, .thread-reply {
+.post, .thread, .thread-reply, .preview {
   margin-bottom: 50px;
 
   .post-content, .thread-content {
@@ -224,11 +224,8 @@ span.no-about {
     clear: both;
     word-wrap: break-word;
     overflow: hidden;
-
-    img {
-      max-width: 100%;
-    }
   }
+
   .post-title, .thread-title {
     margin-bottom: 10px;
     word-wrap: break-word;
@@ -297,7 +294,9 @@ pre {
 
   // code blocks
   code {
-    padding: 0;
+    display: block;
+    padding: 0.5em;
+    color: #C5C8C6; //hljs
     box-shadow: 0 0 16px #222 inset;
     background: #3f3f3f !important;
     border: none;
@@ -388,6 +387,28 @@ blockquote p {
   }
 }
 
+.md_editor {
+  .field_container {
+    position: relative;
+
+    .preview-button {
+      position: absolute;
+      top: 1em;
+      left: 1em;
+      z-index: 10;
+    }
+    .editor_field {
+      padding-top: 4em;
+      min-height: 5em;
+    }
+
+    .preview {
+      display: none;
+      padding: 4em 1em 1em;
+    }
+  }
+}
+
 #comments {
   margin: 50px 0 0 40px;
 }
@@ -457,10 +478,6 @@ textarea {
   padding: 1em;
   min-height: 3.5em;
   resize: vertical;
-
-  &.comment {
-    height: 75px;
-  }
 }
 
 tr.spacer {