Start integrating Hugo in the new plugin

Former-commit-id: dcc6bd82b3d3a89637a1032aad1a25d0b1f80046 [formerly 8784cd37bf58e81cdbe1bcec00e6f16b58efc915] [formerly 9e25850e063ae0825de337d5d5f29cee601b9040 [formerly 8b1d36dfb9ebfa001ddeef98034bb5a73d135c94]]
Former-commit-id: 04a38bea2d141093570d9289d0d0a056a136fe8a [formerly 5995538504889e698aa6cd35b7da40c38b5d5ddf]
Former-commit-id: 8c81a0b060167e1a2983a99bc87b380838ac07dc

file.go

@@ -108,10 +108,10 @@ func getInfo(url *url.URL, c *FileManager, u *User) (*file, error) {
 }
 
 // getListing gets the information about a specific directory and its files.
-func (i *file) getListing(c *requestContext, r *http.Request) error {
+func (i *file) getListing(c *RequestContext, r *http.Request) error {
 	// Gets the directory information using the Virtual File System of
 	// the user configuration.
-	f, err := c.us.FileSystem.OpenFile(context.TODO(), c.fi.VirtualPath, os.O_RDONLY, 0)
+	f, err := c.User.FileSystem.OpenFile(context.TODO(), c.FI.VirtualPath, os.O_RDONLY, 0)
 	if err != nil {
 		return err
 	}
@@ -130,7 +130,7 @@ func (i *file) getListing(c *requestContext, r *http.Request) error {
 
 	for _, f := range files {
 		name := f.Name()
-		allowed := c.us.Allowed("/" + name)
+		allowed := c.User.Allowed("/" + name)
 
 		if !allowed {
 			continue
@@ -433,12 +433,14 @@ func editorLanguage(mode string) string {
 		mode = "asciidoc"
 	case "rst":
 		mode = "rst"
-	case "html", "htm":
-		mode = "html"
+	case "html", "htm", "xml":
+		mode = "htmlmixed"
 	case "js":
 		mode = "javascript"
 	case "go":
 		mode = "golang"
+	case "":
+		mode = "text"
 	}
 
 	return mode