Page Speed Optimization Libraries  1.4.26.1
net/instaweb/rewriter/public/script_tag_scanner.h
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00001 /*
00002  * Copyright 2010 Google Inc.
00003  *
00004  * Licensed under the Apache License, Version 2.0 (the "License");
00005  * you may not use this file except in compliance with the License.
00006  * You may obtain a copy of the License at
00007  *
00008  *      http:///www.apache.org/licenses/LICENSE-2.0
00009  *
00010  * Unless required by applicable law or agreed to in writing, software
00011  * distributed under the License is distributed on an "AS IS" BASIS,
00012  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00013  * See the License for the specific language governing permissions and
00014  * limitations under the License.
00015  */
00016 
00018 
00019 #ifndef NET_INSTAWEB_REWRITER_PUBLIC_SCRIPT_TAG_SCANNER_H_
00020 #define NET_INSTAWEB_REWRITER_PUBLIC_SCRIPT_TAG_SCANNER_H_
00021 
00022 #include "net/instaweb/htmlparse/public/html_element.h"
00023 #include "net/instaweb/util/public/basictypes.h"
00024 #include "net/instaweb/util/public/string.h"
00025 #include "net/instaweb/util/public/string_util.h"
00026 
00027 namespace net_instaweb {
00028 class HtmlParse;
00029 
00030 class ScriptTagScanner {
00031  public:
00032   enum ScriptClassification {
00033     kNonScript,
00034     kUnknownScript,
00035     kJavaScript
00036   };
00037 
00039   enum ExecutionModeFlags {
00040     kExecuteSync = 0,
00041     kExecuteDefer = 1,
00042     kExecuteAsync = 2,
00043     kExecuteForEvent = 4  
00044 
00045 
00046   };
00047 
00048   explicit ScriptTagScanner(HtmlParse* html_parse);
00049 
00054   ScriptClassification ParseScriptElement(HtmlElement* element,
00055                                           HtmlElement::Attribute** src);
00056 
00060   int ExecutionMode(const HtmlElement* element) const;
00061 
00062  private:
00064   static GoogleString Normalized(const StringPiece& str);
00065 
00066   bool IsJsMime(const GoogleString& type_str);
00067 
00068   DISALLOW_COPY_AND_ASSIGN(ScriptTagScanner);
00069 };
00070 
00071 }  
00072 
00073 #endif  ///< NET_INSTAWEB_REWRITER_PUBLIC_SCRIPT_TAG_SCANNER_H_
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