Rename the xmpp-parsers directory to parsers

This doesn’t change anything to the name of the crate, just makes
autocompletion easier by not sharing the same prefix as the xmpp crate.

parsers/src/jingle_grouping.rs

@@ -0,0 +1,90 @@
+// Copyright (c) 2020 Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+use crate::jingle::ContentId;
+
+generate_attribute!(
+    /// The semantics of the grouping.
+    Semantics, "semantics", {
+        /// Lip synchronsation.
+        Ls => "LS",
+
+        /// Bundle.
+        Bundle => "BUNDLE",
+    }
+);
+
+generate_element!(
+    /// Describes a content that should be grouped with other ones.
+    Content, "content", JINGLE_GROUPING,
+    attributes: [
+        /// The name of the matching [`Content`](crate::jingle::Content).
+        name: Required<ContentId> = "name",
+    ]
+);
+
+impl Content {
+    /// Creates a new <content/> element.
+    pub fn new(name: &str) -> Content {
+        Content {
+            name: ContentId(name.to_string()),
+        }
+    }
+}
+
+generate_element!(
+    /// A semantic group of contents.
+    Group, "group", JINGLE_GROUPING,
+    attributes: [
+        /// Semantics of the grouping.
+        semantics: Required<Semantics> = "semantics",
+    ],
+    children: [
+        /// List of contents that should be grouped with each other.
+        contents: Vec<Content> = ("content", JINGLE_GROUPING) => Content
+    ]
+);
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use crate::Element;
+    use std::convert::TryFrom;
+
+    #[cfg(target_pointer_width = "32")]
+    #[test]
+    fn test_size() {
+        assert_size!(Semantics, 1);
+        assert_size!(Content, 12);
+        assert_size!(Group, 16);
+    }
+
+    #[cfg(target_pointer_width = "64")]
+    #[test]
+    fn test_size() {
+        assert_size!(Semantics, 1);
+        assert_size!(Content, 24);
+        assert_size!(Group, 32);
+    }
+
+    #[test]
+    fn parse_group() {
+        let elem: Element = "
+        <group xmlns='urn:xmpp:jingle:apps:grouping:0' semantics='BUNDLE'>
+            <content name='voice'/>
+            <content name='webcam'/>
+        </group>"
+            .parse()
+            .unwrap();
+        let group = Group::try_from(elem).unwrap();
+        assert_eq!(group.semantics, Semantics::Bundle);
+        assert_eq!(group.contents.len(), 2);
+        assert_eq!(
+            group.contents,
+            &[Content::new("voice"), Content::new("webcam")]
+        );
+    }
+}