项目结构调整

Others/Dragablz/Dragablz/Dockablz/LayoutAccessor.cs

@@ -0,0 +1,110 @@
+using System;
+using System.Collections.Generic;
+
+namespace Dragablz.Dockablz
+{
+    /// <summary>
+    /// Provides information about the <see cref="Layout"/> instance.
+    /// </summary>
+    public class LayoutAccessor
+    {
+        private readonly Layout _layout;
+        private readonly BranchAccessor _branchAccessor;
+        private readonly TabablzControl _tabablzControl;
+
+        public LayoutAccessor(Layout layout)
+        {
+            if (layout == null) throw new ArgumentNullException("layout");
+            
+            _layout = layout;
+
+            var branch = Layout.Content as Branch;
+            if (branch != null)
+                _branchAccessor = new BranchAccessor(branch);
+            else            
+                _tabablzControl = Layout.Content as TabablzControl;            
+        }
+
+        public Layout Layout
+        {
+            get { return _layout; }
+        }
+
+        public IEnumerable<DragablzItem> FloatingItems
+        {
+            get { return _layout.FloatingDragablzItems(); }
+        }
+
+        /// <summary>
+        /// <see cref="BranchAccessor"/> and <see cref="TabablzControl"/> are mutually exclusive, according to whether the layout has been split, or just contains a tab control.
+        /// </summary>
+        public BranchAccessor BranchAccessor
+        {
+            get { return _branchAccessor; }
+        }
+
+        /// <summary>
+        /// <see cref="BranchAccessor"/> and <see cref="TabablzControl"/> are mutually exclusive, according to whether the layout has been split, or just contains a tab control.
+        /// </summary>
+        public TabablzControl TabablzControl
+        {
+            get { return _tabablzControl; }
+        }
+
+        /// <summary>
+        /// Visits the content of the layout, according to its content type.  No more than one of the provided <see cref="Action"/>
+        /// callbacks will be called.  
+        /// </summary>        
+        public LayoutAccessor Visit(
+            Action<BranchAccessor> branchVisitor = null,
+            Action<TabablzControl> tabablzControlVisitor = null,
+            Action<object> contentVisitor = null)
+        {
+            if (_branchAccessor != null)
+            {
+                if (branchVisitor != null)
+                {
+                    branchVisitor(_branchAccessor);
+                }
+                    
+                return this;
+            }
+
+            if (_tabablzControl != null)
+            {
+                if (tabablzControlVisitor != null)
+                    tabablzControlVisitor(_tabablzControl);
+
+                return this;
+            }
+
+            if (_layout.Content != null && contentVisitor != null)
+                contentVisitor(_layout.Content);
+
+            return this;
+        }
+
+        /// <summary>
+        /// Gets all the Tabablz controls in a Layout, regardless of location.
+        /// </summary>
+        /// <returns></returns>
+        public IEnumerable<TabablzControl> TabablzControls()
+        {
+            var tabablzControls = new List<TabablzControl>();
+            this.Visit(tabablzControls, BranchAccessorVisitor, TabablzControlVisitor);
+            return tabablzControls;
+        }
+
+        private static void TabablzControlVisitor(IList<TabablzControl> resultSet, TabablzControl tabablzControl)
+        {
+            resultSet.Add(tabablzControl);
+        }
+
+        private static void BranchAccessorVisitor(IList<TabablzControl> resultSet, BranchAccessor branchAccessor)
+        {
+            branchAccessor
+                .Visit(resultSet, BranchItem.First, BranchAccessorVisitor, TabablzControlVisitor)
+                .Visit(resultSet, BranchItem.Second, BranchAccessorVisitor, TabablzControlVisitor);
+        }
+    }
+}