adding rustdocs

1 files changed, 25 insertions, 0 deletions

diff --git a/src/attributes/label.rs b/src/attributes/label.rs
index e62de2b..303b449 100644
--- a/src/attributes/label.rs
+++ b/src/attributes/label.rs
@@ -1,6 +1,14 @@
 use crate::dot::DotString;
 use std::borrow::Cow;
 
+/// Justification for cluster labels.
+///
+/// Right, the label is right-justified within bounding rectangle
+/// Left, left-justified
+/// Else the label is centered.
+///
+/// Note that a subgraph inherits attributes from its parent.
+/// Thus, if the root graph sets labeljust=l, the subgraph inherits this value.
 pub enum LabelJustification {
     Left,
     Right,
@@ -17,6 +25,23 @@ impl<'a> DotString<'a> for LabelJustification {
     }
 }
 
+/// Vertical placement of labels for nodes, root graphs and clusters.
+///
+/// For graphs and clusters, only labelloc=t and labelloc=b are allowed,
+/// corresponding to placement at the top and bottom, respectively.
+///
+/// By default, root graph labels go on the bottom and cluster labels go on the top.
+///
+/// Note that a subgraph inherits attributes from its parent.
+/// Thus, if the root graph sets labelloc=b, the subgraph inherits this value.
+///
+/// For nodes, this attribute is used only when the height of the node is larger than the height
+/// of its label.
+///
+/// If labelloc=t, labelloc=c, labelloc=b, the label is aligned with the top, centered, or aligned
+/// with the bottom of the node, respectively.
+///
+/// By default, the label is vertically centered.
 pub enum LabelLocation {
     Top,
     Center,