From aa50fb652b6750585fcf950f8ebe6423d089afac Mon Sep 17 00:00:00 2001
From: xieguigang <xie.guigang@gcmodeller.org>
Date: Fri, 27 Apr 2018 01:09:44 +0800
Subject: [PATCH] add code comments

---
 viz/ts/svg/svg/Canvas/Canvas.ts | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/viz/ts/svg/svg/Canvas/Canvas.ts b/viz/ts/svg/svg/Canvas/Canvas.ts
index fe22e3e..50eabdc 100644
--- a/viz/ts/svg/svg/Canvas/Canvas.ts
+++ b/viz/ts/svg/svg/Canvas/Canvas.ts
@@ -2,8 +2,21 @@
 
 namespace Canvas {
 
+    /**
+     * CSS style object model
+    */
     export interface ICSSStyle {
+
+        /**
+         * Apply CSS style to a given svg node element
+         * 
+         * @param node a given svg document node object
+        */
         Styling(node: SVGElement): SVGElement;
+        /**
+         * Generate css style string value from this 
+         * css style object model.
+        */
         CSSStyle(): string;
     }