AspGenerator.cs
上传用户:whwld168
上传日期:2008-02-07
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文件大小:16k
- //
- // System.Web.Compilation.AspGenerator
- //
- // Authors:
- // Gonzalo Paniagua Javier (gonzalo@ximian.com)
- //
- // (C) 2002,2003 Ximian, Inc (http://www.ximian.com)
- //
- //
- // Permission is hereby granted, free of charge, to any person obtaining
- // a copy of this software and associated documentation files (the
- // "Software"), to deal in the Software without restriction, including
- // without limitation the rights to use, copy, modify, merge, publish,
- // distribute, sublicense, and/or sell copies of the Software, and to
- // permit persons to whom the Software is furnished to do so, subject to
- // the following conditions:
- //
- // The above copyright notice and this permission notice shall be
- // included in all copies or substantial portions of the Software.
- //
- // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
- // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
- // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
- // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- //
- using System;
- using System.Collections;
- using System.CodeDom.Compiler;
- using System.IO;
- using System.Text;
- using System.Web.Caching;
- using System.Web.UI;
- using System.Web.Util;
- namespace System.Web.Compilation
- {
- class BuilderLocation
- {
- public ControlBuilder Builder;
- public ILocation Location;
- public BuilderLocation (ControlBuilder builder, ILocation location)
- {
- this.Builder = builder;
- this.Location = location;
- }
- }
- class BuilderLocationStack : Stack
- {
- public override void Push (object o)
- {
- if (!(o is BuilderLocation))
- throw new InvalidOperationException ();
- base.Push (o);
- }
-
- public virtual void Push (ControlBuilder builder, ILocation location)
- {
- BuilderLocation bl = new BuilderLocation (builder, location);
- Push (bl);
- }
- public new BuilderLocation Peek ()
- {
- return (BuilderLocation) base.Peek ();
- }
- public new BuilderLocation Pop ()
- {
- return (BuilderLocation) base.Pop ();
- }
- public ControlBuilder Builder {
- get { return Peek ().Builder; }
- }
- }
- class ParserStack
- {
- Hashtable files;
- Stack parsers;
- AspParser current;
- public ParserStack ()
- {
- files = new Hashtable (); // may be this should be case sensitive for windows
- parsers = new Stack ();
- }
-
- public bool Push (AspParser parser)
- {
- if (files.Contains (parser.Filename))
- return false;
- files [parser.Filename] = true;
- parsers.Push (parser);
- current = parser;
- return true;
- }
- public AspParser Pop ()
- {
- if (parsers.Count == 0)
- return null;
- files.Remove (current.Filename);
- AspParser result = (AspParser) parsers.Pop ();
- if (parsers.Count > 0)
- current = (AspParser) parsers.Peek ();
- else
- current = null;
- return result;
- }
-
- public AspParser Parser {
- get { return current; }
- }
- public string Filename {
- get { return current.Filename; }
- }
- }
-
- class AspGenerator
- {
- ParserStack pstack;
- BuilderLocationStack stack;
- TemplateParser tparser;
- StringBuilder text;
- RootBuilder rootBuilder;
- bool inScript, javascript;
- ILocation location;
- bool isApplication;
- StringBuilder tagInnerText = new StringBuilder ();
- static Hashtable emptyHash = new Hashtable ();
- public AspGenerator (TemplateParser tparser)
- {
- this.tparser = tparser;
- tparser.AddDependency (tparser.InputFile);
- text = new StringBuilder ();
- stack = new BuilderLocationStack ();
- rootBuilder = new RootBuilder (tparser);
- stack.Push (rootBuilder, null);
- tparser.RootBuilder = rootBuilder;
- pstack = new ParserStack ();
- }
- public AspParser Parser {
- get { return pstack.Parser; }
- }
-
- public string Filename {
- get { return pstack.Filename; }
- }
-
- BaseCompiler GetCompilerFromType ()
- {
- Type type = tparser.GetType ();
- if (type == typeof (PageParser))
- return new PageCompiler ((PageParser) tparser);
- if (type == typeof (ApplicationFileParser))
- return new GlobalAsaxCompiler ((ApplicationFileParser) tparser);
- if (type == typeof (UserControlParser))
- return new UserControlCompiler ((UserControlParser) tparser);
- throw new Exception ("Got type: " + type);
- }
-
- void InitParser (string filename)
- {
- StreamReader reader = new StreamReader (filename, WebEncoding.FileEncoding);
- AspParser parser = new AspParser (filename, reader);
- reader.Close ();
- parser.Error += new ParseErrorHandler (ParseError);
- parser.TagParsed += new TagParsedHandler (TagParsed);
- parser.TextParsed += new TextParsedHandler (TextParsed);
- if (!pstack.Push (parser))
- throw new ParseException (Location, "Infinite recursion detected including file: " + filename);
- tparser.AddDependency (filename);
- }
- void DoParse ()
- {
- pstack.Parser.Parse ();
- if (text.Length > 0)
- FlushText ();
- pstack.Pop ();
- }
- public Type GetCompiledType ()
- {
- Type type = (Type) HttpRuntime.Cache.Get ("@@Type" + tparser.InputFile);
- if (type != null) {
- return type;
- }
- isApplication = tparser.DefaultDirectiveName == "application";
- InitParser (Path.GetFullPath (tparser.InputFile));
- DoParse ();
- #if DEBUG
- PrintTree (rootBuilder, 0);
- #endif
- if (stack.Count > 1)
- throw new ParseException (stack.Builder.location,
- "Expecting </" + stack.Builder.TagName + ">" + stack.Builder);
- BaseCompiler compiler = GetCompilerFromType ();
- type = compiler.GetCompiledType ();
- CacheDependency cd = new CacheDependency ((string[])
- tparser.Dependencies.ToArray (typeof (string)));
- HttpRuntime.Cache.Insert ("@@Type" + tparser.InputFile, type, cd);
- return type;
- }
- #if DEBUG
- static void PrintTree (ControlBuilder builder, int indent)
- {
- if (builder == null)
- return;
- string i = new string ('t', indent);
- Console.Write (i);
- Console.WriteLine ("b: {0} id: {1} type: {2} parent: {3}",
- builder, builder.ID, builder.ControlType, builder.parentBuilder);
- if (builder.Children != null)
- foreach (object o in builder.Children) {
- if (o is ControlBuilder)
- PrintTree ((ControlBuilder) o, indent++);
- }
- }
- #endif
-
- static void PrintLocation (ILocation loc)
- {
- Console.WriteLine ("tFile name: " + loc.Filename);
- Console.WriteLine ("tBegin line: " + loc.BeginLine);
- Console.WriteLine ("tEnd line: " + loc.EndLine);
- Console.WriteLine ("tBegin column: " + loc.BeginColumn);
- Console.WriteLine ("tEnd column: " + loc.EndColumn);
- Console.WriteLine ("tPlainText: " + loc.PlainText);
- Console.WriteLine ();
- }
- void ParseError (ILocation location, string message)
- {
- throw new ParseException (location, message);
- }
- void TagParsed (ILocation location, TagType tagtype, string tagid, TagAttributes attributes)
- {
- this.location = new Location (location);
- if (tparser != null)
- tparser.Location = location;
- if (text.Length != 0)
- FlushText ();
- if (0 == String.Compare (tagid, "script", true)) {
- if (ProcessScript (tagtype, attributes))
- return;
- }
- switch (tagtype) {
- case TagType.Directive:
- if (tagid == "")
- tagid = tparser.DefaultDirectiveName;
- tparser.AddDirective (tagid, attributes.GetDictionary (null));
- break;
- case TagType.Tag:
- if (!ProcessTag (tagid, attributes, tagtype))
- TextParsed (location, location.PlainText);
- break;
- case TagType.Close:
- if (!CloseControl (tagid))
- TextParsed (location, location.PlainText);
- break;
- case TagType.SelfClosing:
- int count = stack.Count;
- if (!ProcessTag (tagid, attributes, tagtype)) {
- TextParsed (location, location.PlainText);
- } else if (stack.Count != count) {
- CloseControl (tagid);
- }
- break;
- case TagType.DataBinding:
- goto case TagType.CodeRender;
- case TagType.CodeRenderExpression:
- goto case TagType.CodeRender;
- case TagType.CodeRender:
- if (isApplication)
- throw new ParseException (location, "Invalid content for application file.");
-
- ProcessCode (tagtype, tagid, location);
- break;
- case TagType.Include:
- if (isApplication)
- throw new ParseException (location, "Invalid content for application file.");
-
- string file = attributes ["virtual"] as string;
- bool isvirtual = (file != null);
- if (!isvirtual)
- file = attributes ["file"] as string;
- if (isvirtual) {
- file = tparser.MapPath (file);
- } else {
- file = GetIncludeFilePath (tparser.BaseDir, file);
- }
- InitParser (file);
- DoParse ();
- break;
- default:
- break;
- }
- //PrintLocation (location);
- }
- static string GetIncludeFilePath (string basedir, string filename)
- {
- if (Path.DirectorySeparatorChar == '/')
- filename = filename.Replace ("\", "/");
- return Path.GetFullPath (Path.Combine (basedir, filename));
- }
-
- void TextParsed (ILocation location, string text)
- {
- if (text.IndexOf ("<%") != -1 && !inScript) {
- if (this.text.Length > 0)
- FlushText ();
- CodeRenderParser r = new CodeRenderParser (text, stack.Builder);
- r.AddChildren ();
- return;
- }
- this.text.Append (text);
- //PrintLocation (location);
- }
- void FlushText ()
- {
- string t = text.ToString ();
- text.Length = 0;
- if (inScript) {
- // TODO: store location
- tparser.Scripts.Add (t);
- return;
- }
- if (tparser.DefaultDirectiveName == "application" && t.Trim () != "")
- throw new ParseException (location, "Content not valid for application file.");
- ControlBuilder current = stack.Builder;
- current.AppendLiteralString (t);
- if (current.NeedsTagInnerText ()) {
- tagInnerText.Append (t);
- }
- }
- bool ProcessTag (string tagid, TagAttributes atts, TagType tagtype)
- {
- if ((atts == null || !atts.IsRunAtServer ()) && String.Compare (tagid, "tbody", true) == 0) {
- // MS completely ignores tbody or, if runat="server", fails when compiling
- if (stack.Count > 0)
- return stack.Builder.ChildrenAsProperties;
- return false;
- }
- if (isApplication) {
- if (String.Compare (tagid, "object", true) != 0)
- throw new ParseException (location, "Invalid tag for application file.");
- }
- ControlBuilder parent = stack.Builder;
- ControlBuilder builder = null;
- Hashtable htable = (atts != null) ? atts.GetDictionary (null) : emptyHash;
- if (stack.Count > 1) {
- try {
- builder = parent.CreateSubBuilder (tagid, htable, null, tparser, location);
- } catch (TypeLoadException e) {
- throw new ParseException (Location, "Type not found.", e);
- } catch (Exception e) {
- throw new ParseException (Location, e.Message, e);
- }
- }
- if (builder == null && atts != null && atts.IsRunAtServer ()) {
- string id = htable ["id"] as string;
- if (id != null && !CodeGenerator.IsValidLanguageIndependentIdentifier (id))
- throw new ParseException (Location, "'" + id + "' is not a valid identifier");
-
- try {
- builder = rootBuilder.CreateSubBuilder (tagid, htable, null, tparser, location);
- } catch (TypeLoadException e) {
- throw new ParseException (Location, "Type not found.", e);
- } catch (Exception e) {
- throw new ParseException (Location, e.Message, e);
- }
- }
-
- if (builder == null)
- return false;
- builder.location = location;
- builder.ID = htable ["id"] as string;
- if (builder.HasBody () && !(builder is ObjectTagBuilder)) {
- if (builder is TemplateBuilder) {
- // push the id list
- }
- stack.Push (builder, location);
- } else {
- if (!isApplication && builder is ObjectTagBuilder) {
- ObjectTagBuilder ot = (ObjectTagBuilder) builder;
- if (ot.Scope != null && ot.Scope != "")
- throw new ParseException (location, "Scope not allowed here");
- if (tagtype == TagType.Tag) {
- stack.Push (builder, location);
- return true;
- }
- }
-
- parent.AppendSubBuilder (builder);
- builder.CloseControl ();
- }
- return true;
- }
- bool ProcessScript (TagType tagtype, TagAttributes attributes)
- {
- if (tagtype != TagType.Close) {
- if (attributes != null && attributes.IsRunAtServer ()) {
- CheckLanguage ((string) attributes ["language"]);
- if (tagtype == TagType.Tag) {
- Parser.VerbatimID = "script";
- inScript = true;
- } //else if (tagtype == TagType.SelfClosing)
- // load script file here
- return true;
- } else {
- Parser.VerbatimID = "script";
- javascript = true;
- TextParsed (location, location.PlainText);
- return true;
- }
- }
- bool result;
- if (inScript) {
- result = inScript;
- inScript = false;
- } else {
- result = javascript;
- javascript = false;
- TextParsed (location, location.PlainText);
- }
- return result;
- }
- bool CloseControl (string tagid)
- {
- ControlBuilder current = stack.Builder;
- if (String.Compare (tagid, "tbody", true) == 0) {
- if (!current.ChildrenAsProperties) {
- try {
- TextParsed (location, location.PlainText);
- FlushText ();
- } catch {}
- }
- return true;
- }
-
- string btag = current.TagName;
- if (0 != String.Compare (tagid, btag, true))
- return false;
- // if (current is TemplateBuilder)
- // pop from the id list
- if (current.NeedsTagInnerText ()) {
- try {
- current.SetTagInnerText (tagInnerText.ToString ());
- } catch (Exception e) {
- throw new ParseException (current.location, e.Message, e);
- }
- tagInnerText.Length = 0;
- }
- current.CloseControl ();
- stack.Pop ();
- stack.Builder.AppendSubBuilder (current);
- return true;
- }
- bool ProcessCode (TagType tagtype, string code, ILocation location)
- {
- ControlBuilder b = null;
- if (tagtype == TagType.CodeRender)
- b = new CodeRenderBuilder (code, false, location);
- else if (tagtype == TagType.CodeRenderExpression)
- b = new CodeRenderBuilder (code, true, location);
- else if (tagtype == TagType.DataBinding)
- b = new DataBindingBuilder (code, location);
- else
- throw new HttpException ("Should never happen");
- stack.Builder.AppendSubBuilder (b);
- return true;
- }
- public ILocation Location {
- get { return location; }
- }
- void CheckLanguage (string lang)
- {
- if (lang == null || lang == "")
- return;
- if (String.Compare (lang, tparser.Language, true) != 0) {
- throw new ParseException (Location,
- String.Format ("Trying to mix language '{0}' and '{1}'.",
- tparser.Language, lang));
- }
- }
- // Used to get CodeRender tags in attribute values
- class CodeRenderParser
- {
- string str;
- ControlBuilder builder;
- public CodeRenderParser (string str, ControlBuilder builder)
- {
- this.str = str;
- this.builder = builder;
- }
- public void AddChildren ()
- {
- int index = str.IndexOf ("<%");
- if (index > 0) {
- TextParsed (null, str.Substring (0, index));
- str = str.Substring (index);
- }
- AspParser parser = new AspParser ("@@inner_string@@", new StringReader (str));
- parser.Error += new ParseErrorHandler (ParseError);
- parser.TagParsed += new TagParsedHandler (TagParsed);
- parser.TextParsed += new TextParsedHandler (TextParsed);
- parser.Parse ();
- }
- void TagParsed (ILocation location, TagType tagtype, string tagid, TagAttributes attributes)
- {
- if (tagtype == TagType.CodeRender)
- builder.AppendSubBuilder (new CodeRenderBuilder (tagid, false, location));
- else if (tagtype == TagType.CodeRenderExpression)
- builder.AppendSubBuilder (new CodeRenderBuilder (tagid, true, location));
- else if (tagtype == TagType.DataBinding)
- builder.AppendSubBuilder (new DataBindingBuilder (tagid, location));
- else
- builder.AppendLiteralString (location.PlainText);
- }
- void TextParsed (ILocation location, string text)
- {
- builder.AppendLiteralString (text);
- }
- void ParseError (ILocation location, string message)
- {
- throw new ParseException (location, message);
- }
- }
- }
- }