568 lines
22 KiB
C#
568 lines
22 KiB
C#
//
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// System.Web.Compilation.PageCompiler
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//
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// Authors:
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// Gonzalo Paniagua Javier (gonzalo@ximian.com)
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//
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// (C) 2002,2003 Ximian, Inc (http://www.ximian.com)
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//
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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using System;
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using System.CodeDom;
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using System.Collections;
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using System.Collections.Generic;
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using System.IO;
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using System.Reflection;
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using System.Text;
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using System.Web.Configuration;
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using System.Web.UI;
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using System.Web.SessionState;
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using System.Web.Util;
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using System.Web.Profile;
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namespace System.Web.Compilation
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{
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class PageCompiler : TemplateControlCompiler
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{
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PageParser pageParser;
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static CodeTypeReference intRef = new CodeTypeReference (typeof (int));
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public PageCompiler (PageParser pageParser)
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: base (pageParser)
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{
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this.pageParser = pageParser;
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}
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protected override void CreateStaticFields ()
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{
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base.CreateStaticFields ();
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CodeMemberField fld = new CodeMemberField (typeof (object), "__fileDependencies");
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fld.Attributes = MemberAttributes.Private | MemberAttributes.Static;
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fld.InitExpression = new CodePrimitiveExpression (null);
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mainClass.Members.Add (fld);
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if (pageParser.OutputCache) {
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fld = new CodeMemberField (typeof (OutputCacheParameters), "__outputCacheSettings");
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fld.Attributes = MemberAttributes.Private | MemberAttributes.Static;
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fld.InitExpression = new CodePrimitiveExpression (null);
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mainClass.Members.Add (fld);
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}
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}
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protected override void CreateConstructor (CodeStatementCollection localVars,
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CodeStatementCollection trueStmt)
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{
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MainDirectiveAttribute <string> masterPageFile = pageParser.MasterPageFile;
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if (masterPageFile != null && !masterPageFile.IsExpression)
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// This is here just to trigger master page build, so that its type
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// is available when compiling the page itself.
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BuildManager.GetCompiledType (masterPageFile.Value);
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MainDirectiveAttribute <string> clientTarget;
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clientTarget = pageParser.ClientTarget;
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if (clientTarget != null) {
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CodeExpression prop;
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prop = new CodePropertyReferenceExpression (thisRef, "ClientTarget");
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CodeExpression ct = null;
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if (clientTarget.IsExpression) {
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var pi = GetFieldOrProperty (typeof (Page), "ClientTarget") as PropertyInfo;
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if (pi != null)
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ct = CompileExpression (pi, pi.PropertyType, clientTarget.UnparsedValue, false);
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}
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if (ct == null)
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ct = new CodePrimitiveExpression (clientTarget.Value);
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if (localVars == null)
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localVars = new CodeStatementCollection ();
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localVars.Add (new CodeAssignStatement (prop, ct));
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}
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List <string> deps = pageParser.Dependencies;
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int depsCount = deps != null ? deps.Count : 0;
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if (depsCount > 0) {
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if (localVars == null)
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localVars = new CodeStatementCollection ();
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if (trueStmt == null)
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trueStmt = new CodeStatementCollection ();
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CodeAssignStatement assign;
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localVars.Add (
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new CodeVariableDeclarationStatement (
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typeof (string[]),
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"dependencies")
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);
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CodeVariableReferenceExpression dependencies = new CodeVariableReferenceExpression ("dependencies");
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trueStmt.Add (
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new CodeAssignStatement (dependencies, new CodeArrayCreateExpression (typeof (string), depsCount))
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);
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CodeArrayIndexerExpression arrayIndex;
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object o;
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for (int i = 0; i < depsCount; i++) {
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o = deps [i];
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arrayIndex = new CodeArrayIndexerExpression (dependencies, new CodeExpression[] {new CodePrimitiveExpression (i)});
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assign = new CodeAssignStatement (arrayIndex, new CodePrimitiveExpression (o));
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trueStmt.Add (assign);
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}
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CodeMethodInvokeExpression getDepsCall = new CodeMethodInvokeExpression (
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thisRef,
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"GetWrappedFileDependencies",
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new CodeExpression[] {dependencies}
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);
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assign = new CodeAssignStatement (GetMainClassFieldReferenceExpression ("__fileDependencies"), getDepsCall);
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trueStmt.Add (assign);
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}
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base.CreateConstructor (localVars, trueStmt);
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}
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protected override void AddInterfaces ()
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{
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base.AddInterfaces ();
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CodeTypeReference cref;
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if (pageParser.EnableSessionState) {
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cref = new CodeTypeReference (typeof (IRequiresSessionState));
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if (partialClass != null)
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partialClass.BaseTypes.Add (cref);
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else
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mainClass.BaseTypes.Add (cref);
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}
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if (pageParser.ReadOnlySessionState) {
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cref = new CodeTypeReference (typeof (IReadOnlySessionState));
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if (partialClass != null)
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partialClass.BaseTypes.Add (cref);
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else
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mainClass.BaseTypes.Add (cref);
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}
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if (pageParser.Async)
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mainClass.BaseTypes.Add (new CodeTypeReference (typeof (System.Web.IHttpAsyncHandler)));
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mainClass.BaseTypes.Add (new CodeTypeReference (typeof (System.Web.IHttpHandler)));
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}
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void CreateGetTypeHashCode ()
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{
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CodeMemberMethod method = new CodeMemberMethod ();
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method.ReturnType = intRef;
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method.Name = "GetTypeHashCode";
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method.Attributes = MemberAttributes.Public | MemberAttributes.Override;
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Random rnd = new Random (pageParser.InputFile.GetHashCode ());
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method.Statements.Add (new CodeMethodReturnStatement (new CodePrimitiveExpression (rnd.Next ())));
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mainClass.Members.Add (method);
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}
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static CodeExpression GetExpressionForValueAndType (object value, Type valueType)
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{
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// Put short circuit types here
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if (valueType == typeof (TimeSpan)) {
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CodeMethodReferenceExpression mref = new CodeMethodReferenceExpression (
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new CodeTypeReferenceExpression (typeof (TimeSpan)),
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"Parse");
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return new CodeMethodInvokeExpression (
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mref,
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new CodeExpression[] { new CodePrimitiveExpression (((TimeSpan) value).ToString ()) }
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);
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}
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throw new HttpException (String.Format ("Unable to create assign expression for type '{0}'.", valueType));
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}
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static CodeAssignStatement CreatePropertyAssign (CodeExpression owner, string name, CodeExpression rhs)
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{
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return new CodeAssignStatement (new CodePropertyReferenceExpression (owner, name), rhs);
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}
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static CodeAssignStatement CreatePropertyAssign (CodeExpression owner, string name, object value)
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{
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CodeExpression rhs;
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if (value == null || value is string)
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rhs = new CodePrimitiveExpression (value);
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else {
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Type vt = value.GetType ();
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if (vt.IsPrimitive)
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rhs = new CodePrimitiveExpression (value);
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else
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rhs = GetExpressionForValueAndType (value, vt);
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}
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return CreatePropertyAssign (owner, name, rhs);
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}
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static CodeAssignStatement CreatePropertyAssign (string name, object value)
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{
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return CreatePropertyAssign (thisRef, name, value);
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}
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void AssignPropertyWithExpression <T> (CodeMemberMethod method, string name, MainDirectiveAttribute <T> value, ILocation location)
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{
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if (value == null)
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return;
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CodeAssignStatement assign;
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CodeExpression rhs = null;
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if (value.IsExpression) {
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var pi = GetFieldOrProperty (typeof (Page), name) as PropertyInfo;
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if (pi != null)
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rhs = CompileExpression (pi, pi.PropertyType, value.UnparsedValue, false);
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}
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if (rhs != null)
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assign = CreatePropertyAssign (thisRef, name, rhs);
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else
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assign = CreatePropertyAssign (name, value.Value);
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method.Statements.Add (AddLinePragma (assign, location));
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}
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void AddStatementsFromDirective (ControlBuilder builder, CodeMemberMethod method, ILocation location)
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{
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AssignPropertyWithExpression <string> (method, "ResponseEncoding", pageParser.ResponseEncoding, location);
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AssignPropertyWithExpression <int> (method, "CodePage", pageParser.CodePage, location);
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AssignPropertyWithExpression <int> (method, "LCID", pageParser.LCID, location);
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string contentType = pageParser.ContentType;
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if (contentType != null)
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method.Statements.Add (AddLinePragma (CreatePropertyAssign ("ContentType", contentType), location));
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string culture = pageParser.Culture;
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if (culture != null)
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method.Statements.Add (AddLinePragma (CreatePropertyAssign ("Culture", culture), location));
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culture = pageParser.UICulture;
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if (culture != null)
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method.Statements.Add (AddLinePragma (CreatePropertyAssign ("UICulture", culture), location));
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string errorPage = pageParser.ErrorPage;
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if (errorPage != null)
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method.Statements.Add (AddLinePragma (CreatePropertyAssign ("ErrorPage", errorPage), location));
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if (pageParser.HaveTrace) {
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CodeAssignStatement stmt = new CodeAssignStatement ();
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stmt.Left = new CodePropertyReferenceExpression (thisRef, "TraceEnabled");
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stmt.Right = new CodePrimitiveExpression (pageParser.Trace);
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method.Statements.Add (AddLinePragma (stmt, location));
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}
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if (pageParser.TraceMode != TraceMode.Default) {
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CodeAssignStatement stmt = new CodeAssignStatement ();
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CodeTypeReferenceExpression tm = new CodeTypeReferenceExpression ("System.Web.TraceMode");
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stmt.Left = new CodePropertyReferenceExpression (thisRef, "TraceModeValue");
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stmt.Right = new CodeFieldReferenceExpression (tm, pageParser.TraceMode.ToString ());
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method.Statements.Add (AddLinePragma (stmt, location));
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}
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if (pageParser.NotBuffer) {
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CodeAssignStatement stmt = new CodeAssignStatement ();
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stmt.Left = new CodePropertyReferenceExpression (thisRef, "Buffer");
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stmt.Right = new CodePrimitiveExpression (false);
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method.Statements.Add (AddLinePragma (stmt, location));
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}
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if (!pageParser.EnableEventValidation) {
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CodeAssignStatement stmt = new CodeAssignStatement ();
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CodePropertyReferenceExpression prop;
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prop = new CodePropertyReferenceExpression (thisRef, "EnableEventValidation");
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stmt.Left = prop;
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stmt.Right = new CodePrimitiveExpression (pageParser.EnableEventValidation);
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method.Statements.Add (AddLinePragma (stmt, location));
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}
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if (pageParser.MaintainScrollPositionOnPostBack) {
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CodeAssignStatement stmt = new CodeAssignStatement ();
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CodePropertyReferenceExpression prop;
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prop = new CodePropertyReferenceExpression (thisRef, "MaintainScrollPositionOnPostBack");
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stmt.Left = prop;
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stmt.Right = new CodePrimitiveExpression (pageParser.MaintainScrollPositionOnPostBack);
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method.Statements.Add (AddLinePragma (stmt, location));
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}
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}
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protected override void AddStatementsToConstructor (CodeConstructor ctor)
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{
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base.AddStatementsToConstructor (ctor);
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if (pageParser.OutputCache)
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OutputCacheParamsBlock (ctor);
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}
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protected override void AddStatementsToInitMethodTop (ControlBuilder builder, CodeMemberMethod method)
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{
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base.AddStatementsToInitMethodTop (builder, method);
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ILocation directiveLocation = pageParser.DirectiveLocation;
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AddStatementsFromDirective (builder, method, directiveLocation);
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CodeArgumentReferenceExpression ctrlVar = new CodeArgumentReferenceExpression("__ctrl");
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if (pageParser.EnableViewStateMacSet)
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method.Statements.Add (AddLinePragma (CreatePropertyAssign (ctrlVar, "EnableViewStateMac", pageParser.EnableViewStateMacSet), directiveLocation));
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AssignPropertyWithExpression <string> (method, "Title", pageParser.Title, directiveLocation);
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AssignPropertyWithExpression <string> (method, "MasterPageFile", pageParser.MasterPageFile, directiveLocation);
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AssignPropertyWithExpression <string> (method, "Theme", pageParser.Theme, directiveLocation);
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if (pageParser.StyleSheetTheme != null)
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method.Statements.Add (AddLinePragma (CreatePropertyAssign (ctrlVar, "StyleSheetTheme", pageParser.StyleSheetTheme), directiveLocation));
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if (pageParser.Async != false)
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method.Statements.Add (AddLinePragma (CreatePropertyAssign (ctrlVar, "AsyncMode", pageParser.Async), directiveLocation));
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if (pageParser.AsyncTimeout != -1)
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method.Statements.Add (AddLinePragma (CreatePropertyAssign (ctrlVar, "AsyncTimeout",
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TimeSpan.FromSeconds (pageParser.AsyncTimeout)), directiveLocation));
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CodeMethodInvokeExpression expr = new CodeMethodInvokeExpression (thisRef, "InitializeCulture");
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method.Statements.Add (AddLinePragma (new CodeExpressionStatement (expr), directiveLocation));
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}
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protected override void AddStatementsToInitMethodBottom (ControlBuilder builder, CodeMemberMethod method)
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{
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ILocation directiveLocation = pageParser.DirectiveLocation;
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AssignPropertyWithExpression <string> (method, "MetaDescription", pageParser.MetaDescription, directiveLocation);
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AssignPropertyWithExpression <string> (method, "MetaKeywords", pageParser.MetaKeywords, directiveLocation);
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}
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protected override void PrependStatementsToFrameworkInitialize (CodeMemberMethod method)
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{
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base.PrependStatementsToFrameworkInitialize (method);
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if (pageParser.StyleSheetTheme != null)
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method.Statements.Add (CreatePropertyAssign ("StyleSheetTheme", pageParser.StyleSheetTheme));
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}
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protected override void AppendStatementsToFrameworkInitialize (CodeMemberMethod method)
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{
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base.AppendStatementsToFrameworkInitialize (method);
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List <string> deps = pageParser.Dependencies;
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int depsCount = deps != null ? deps.Count : 0;
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if (depsCount > 0) {
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CodeFieldReferenceExpression fileDependencies = GetMainClassFieldReferenceExpression ("__fileDependencies");
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method.Statements.Add (
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new CodeMethodInvokeExpression (
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thisRef,
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"AddWrappedFileDependencies",
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new CodeExpression[] {fileDependencies})
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);
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}
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if (pageParser.OutputCache) {
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CodeMethodReferenceExpression init = new CodeMethodReferenceExpression (thisRef, "InitOutputCache");
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CodeMethodInvokeExpression invoke = new CodeMethodInvokeExpression (init, GetMainClassFieldReferenceExpression ("__outputCacheSettings"));
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method.Statements.Add (invoke);
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}
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if (pageParser.ValidateRequest) {
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CodeMethodInvokeExpression expr = new CodeMethodInvokeExpression ();
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CodePropertyReferenceExpression prop;
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prop = new CodePropertyReferenceExpression (thisRef, "Request");
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expr.Method = new CodeMethodReferenceExpression (prop, "ValidateInput");
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method.Statements.Add (expr);
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}
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}
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CodeAssignStatement AssignOutputCacheParameter (CodeVariableReferenceExpression variable, string propName, object value)
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{
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var ret = new CodeAssignStatement ();
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ret.Left = new CodeFieldReferenceExpression (variable, propName);
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if (value is OutputCacheLocation)
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ret.Right = new CodeFieldReferenceExpression (
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new CodeTypeReferenceExpression (new CodeTypeReference (typeof (OutputCacheLocation), CodeTypeReferenceOptions.GlobalReference)),
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value.ToString ()
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);
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else
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ret.Right = new CodePrimitiveExpression (value);
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return ret;
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}
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void OutputCacheParamsBlock (CodeMemberMethod method)
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{
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var statements = new List <CodeStatement> ();
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var localSettingsDecl = new CodeVariableDeclarationStatement (typeof (OutputCacheParameters), "outputCacheSettings");
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var localSettings = new CodeVariableReferenceExpression ("outputCacheSettings");
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statements.Add (localSettingsDecl);
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statements.Add (
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new CodeAssignStatement (
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localSettings,
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new CodeObjectCreateExpression (typeof (OutputCacheParameters), new CodeExpression[] {})
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)
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);
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TemplateParser.OutputCacheParsedParams parsed = pageParser.OutputCacheParsedParameters;
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if ((parsed & TemplateParser.OutputCacheParsedParams.CacheProfile) != 0)
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statements.Add (AssignOutputCacheParameter (localSettings, "CacheProfile", pageParser.OutputCacheCacheProfile));
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statements.Add (AssignOutputCacheParameter (localSettings, "Duration", pageParser.OutputCacheDuration));
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if ((parsed & TemplateParser.OutputCacheParsedParams.Location) != 0)
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statements.Add (AssignOutputCacheParameter (localSettings, "Location", pageParser.OutputCacheLocation));
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if ((parsed & TemplateParser.OutputCacheParsedParams.NoStore) != 0)
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statements.Add (AssignOutputCacheParameter (localSettings, "NoStore", pageParser.OutputCacheNoStore));
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if ((parsed & TemplateParser.OutputCacheParsedParams.SqlDependency) != 0)
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statements.Add (AssignOutputCacheParameter (localSettings, "SqlDependency", pageParser.OutputCacheSqlDependency));
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if ((parsed & TemplateParser.OutputCacheParsedParams.VaryByContentEncodings) != 0)
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statements.Add (AssignOutputCacheParameter (localSettings, "VaryByContentEncoding", pageParser.OutputCacheVaryByContentEncodings));
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if ((parsed & TemplateParser.OutputCacheParsedParams.VaryByControl) != 0)
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statements.Add (AssignOutputCacheParameter (localSettings, "VaryByControl", pageParser.OutputCacheVaryByControls));
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if ((parsed & TemplateParser.OutputCacheParsedParams.VaryByCustom) != 0)
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statements.Add (AssignOutputCacheParameter (localSettings, "VaryByCustom", pageParser.OutputCacheVaryByCustom));
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if ((parsed & TemplateParser.OutputCacheParsedParams.VaryByHeader) != 0)
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statements.Add (AssignOutputCacheParameter (localSettings, "VaryByHeader", pageParser.OutputCacheVaryByHeader));
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statements.Add (AssignOutputCacheParameter (localSettings, "VaryByParam", pageParser.OutputCacheVaryByParam));
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CodeFieldReferenceExpression outputCacheSettings = GetMainClassFieldReferenceExpression ("__outputCacheSettings");
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statements.Add (new CodeAssignStatement (outputCacheSettings, localSettings));
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var cond = new CodeConditionStatement (
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new CodeBinaryOperatorExpression (
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outputCacheSettings,
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CodeBinaryOperatorType.IdentityEquality,
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new CodePrimitiveExpression (null)
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),
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statements.ToArray ()
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);
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method.Statements.Add (cond);
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}
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void CreateStronglyTypedProperty (Type type, string name)
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{
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if (type == null)
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return;
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CodeMemberProperty mprop = new CodeMemberProperty ();
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mprop.Name = name;
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mprop.Type = new CodeTypeReference (type);
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mprop.Attributes = MemberAttributes.Public | MemberAttributes.New;
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CodeExpression prop = new CodePropertyReferenceExpression (new CodeBaseReferenceExpression (), name);
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prop = new CodeCastExpression (type, prop);
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mprop.GetStatements.Add (new CodeMethodReturnStatement (prop));
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if (partialClass != null)
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partialClass.Members.Add (mprop);
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else
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mainClass.Members.Add (mprop);
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AddReferencedAssembly (type.Assembly);
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}
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protected internal override void CreateMethods ()
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{
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base.CreateMethods ();
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CreateProfileProperty ();
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CreateStronglyTypedProperty (pageParser.MasterType, "Master");
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CreateStronglyTypedProperty (pageParser.PreviousPageType, "PreviousPage");
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CreateGetTypeHashCode ();
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if (pageParser.Async)
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CreateAsyncMethods ();
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}
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void CreateAsyncMethods ()
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{
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CodeMemberMethod method = new CodeMemberMethod ();
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CodeParameterDeclarationExpression arg;
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CodeMethodInvokeExpression invoke;
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// public virtual System.IAsyncResult BeginProcessRequest(System.Web.HttpContext context, System.AsyncCallback cb, object data);
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method.ReturnType = new CodeTypeReference (typeof (IAsyncResult));
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method.Name = "BeginProcessRequest";
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method.Attributes = MemberAttributes.Public;
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arg = new CodeParameterDeclarationExpression ();
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arg.Type = new CodeTypeReference (typeof (HttpContext));
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arg.Name = "context";
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method.Parameters.Add (arg);
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arg = new CodeParameterDeclarationExpression ();
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arg.Type = new CodeTypeReference (typeof (AsyncCallback));
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arg.Name = "cb";
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method.Parameters.Add (arg);
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arg = new CodeParameterDeclarationExpression ();
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arg.Type = new CodeTypeReference (typeof (object));
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arg.Name = "data";
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method.Parameters.Add (arg);
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invoke = new CodeMethodInvokeExpression (thisRef, "AsyncPageBeginProcessRequest");
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invoke.Parameters.Add (new CodeArgumentReferenceExpression ("context"));
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invoke.Parameters.Add (new CodeArgumentReferenceExpression ("cb"));
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invoke.Parameters.Add (new CodeArgumentReferenceExpression ("data"));
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method.Statements.Add (new CodeMethodReturnStatement (invoke));
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mainClass.Members.Add (method);
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// public virtual void EndProcessRequest(System.IAsyncResult ar);
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method = new CodeMemberMethod ();
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method.ReturnType = new CodeTypeReference (typeof (void));
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method.Name = "EndProcessRequest";
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method.Attributes = MemberAttributes.Public;
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arg = new CodeParameterDeclarationExpression ();
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arg.Type = new CodeTypeReference (typeof (IAsyncResult));
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arg.Name = "ar";
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method.Parameters.Add (arg);
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|
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invoke = new CodeMethodInvokeExpression (thisRef, "AsyncPageEndProcessRequest");
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invoke.Parameters.Add (new CodeArgumentReferenceExpression ("ar"));
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|
|
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method.Statements.Add (invoke);
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mainClass.Members.Add (method);
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|
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// public override void ProcessRequest(System.Web.HttpContext context);
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method = new CodeMemberMethod ();
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method.ReturnType = new CodeTypeReference (typeof (void));
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method.Name = "ProcessRequest";
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method.Attributes = MemberAttributes.Public | MemberAttributes.Override;
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|
|
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arg = new CodeParameterDeclarationExpression ();
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arg.Type = new CodeTypeReference (typeof (HttpContext));
|
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arg.Name = "context";
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method.Parameters.Add (arg);
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invoke = new CodeMethodInvokeExpression (new CodeBaseReferenceExpression (), "ProcessRequest");
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invoke.Parameters.Add (new CodeArgumentReferenceExpression ("context"));
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|
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method.Statements.Add (invoke);
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|
mainClass.Members.Add (method);
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}
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public static Type CompilePageType (PageParser pageParser)
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|
{
|
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PageCompiler compiler = new PageCompiler (pageParser);
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|
return compiler.GetCompiledType ();
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}
|
|
}
|
|
}
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