Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Web.Mobile/UI/MobileControls/Design/Adapters/MSHTMLHostUtil.cs

@@ -0,0 +1,98 @@
+//------------------------------------------------------------------------------
+// <copyright file="MSHTMLHostUtil.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>                                                                
+//------------------------------------------------------------------------------
+
+using System;
+using System.Diagnostics;
+using System.Drawing;
+using System.Web.UI.Design.MobileControls.Util;
+
+namespace System.Web.UI.Design.MobileControls.Adapters
+{
+    [
+        System.Security.Permissions.SecurityPermission(System.Security.Permissions.SecurityAction.Demand,
+        Flags=System.Security.Permissions.SecurityPermissionFlag.UnmanagedCode)
+    ]
+    [Obsolete("The System.Web.Mobile.dll assembly has been deprecated and should no longer be used. For information about how to develop ASP.NET mobile applications, see http://go.microsoft.com/fwlink/?LinkId=157231.")]
+    internal static class MSHTMLHostUtil
+    {
+        private const int CONTROL_WIDTH = 64;
+        private const int CONTROL_HEIGHT = 4096;
+
+        private static MSHTMLHost _tridentControl;
+        private static NativeMethods.IHTMLElement _htmlBody;
+        private static NativeMethods.IHTMLElement _htmlDivOuter;
+        private static NativeMethods.IHTMLElement _htmlDivInner;
+
+        private static void CreateControl()
+        {
+            if (null != _tridentControl && null != _htmlBody)
+            {
+                return;
+            }
+
+            _tridentControl = new MSHTMLHost();
+
+            _tridentControl.Size = new Size(CONTROL_WIDTH, CONTROL_HEIGHT);
+
+            _tridentControl.CreateTrident();
+            _tridentControl.ActivateTrident();
+
+            NativeMethods.IHTMLDocument2 htmlDoc2 = _tridentControl.GetDocument();
+            _htmlBody = htmlDoc2.GetBody();
+        }
+
+        internal static void ApplyStyle(String enterStyle, String exitStyle, String cssStyle)
+        {
+            MSHTMLHostUtil.CreateControl();
+
+            String bodyInnerHTML = "<div id=__divOuter nowrap style='width:1px; height:10px'>" +
+                                   enterStyle +
+                                   "<div id=__divInner" + cssStyle + "></div>" +
+                                   exitStyle +
+                                   "</div>";
+
+            // MessageBox.Show("Body HTML for empty content: " + bodyInnerHTML);
+            _htmlBody.SetInnerHTML(bodyInnerHTML);
+
+            NativeMethods.IHTMLDocument3 htmlDoc3 = (NativeMethods.IHTMLDocument3) _tridentControl.GetDocument();
+            Debug.Assert(null != htmlDoc3);
+
+            _htmlDivInner = htmlDoc3.GetElementById("__divInner");
+            _htmlDivOuter = htmlDoc3.GetElementById("__divOuter");
+            Debug.Assert(null != _htmlDivOuter && null != _htmlDivInner);
+        }
+
+#if UNUSED_CODE
+        internal static int GetTextWidth(String text)
+        {
+            Debug.Assert(null != _htmlDivOuter && null != _htmlDivInner);
+
+            _htmlDivInner.SetInnerText(text);
+            NativeMethods.IHTMLElement2 htmlElement2 = (NativeMethods.IHTMLElement2) _htmlDivOuter;
+            Debug.Assert(null != htmlElement2);
+            return htmlElement2.GetClientWidth();
+        }
+#endif
+
+        internal static int GetHtmlFragmentWidth(String htmlFragment)
+        {
+            Debug.Assert(null != _htmlDivOuter && null != _htmlDivInner);
+            _htmlDivInner.SetInnerHTML(htmlFragment);
+            NativeMethods.IHTMLElement2 htmlElement2 = (NativeMethods.IHTMLElement2) _htmlDivOuter;
+            Debug.Assert(null != htmlElement2);
+            return htmlElement2.GetClientWidth();
+        }
+
+        internal static int GetHtmlFragmentHeight(String htmlFragment)
+        {
+            Debug.Assert(null != _htmlDivOuter && null != _htmlDivInner);
+            _htmlDivInner.SetInnerHTML(htmlFragment);
+            NativeMethods.IHTMLElement2 htmlElement2 = (NativeMethods.IHTMLElement2) _htmlDivOuter;
+            Debug.Assert(null != htmlElement2);
+            return htmlElement2.GetClientHeight();
+        }
+    }
+}