| /* |
| * Copyright 2012 Google Inc. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| // Author: guptaa@google.com (Ashish Gupta) |
| |
| #ifndef NET_INSTAWEB_REWRITER_PUBLIC_COMPUTE_VISIBLE_TEXT_FILTER_H_ |
| #define NET_INSTAWEB_REWRITER_PUBLIC_COMPUTE_VISIBLE_TEXT_FILTER_H_ |
| |
| #include "pagespeed/kernel/base/basictypes.h" |
| #include "pagespeed/kernel/base/string.h" |
| #include "pagespeed/kernel/base/string_writer.h" |
| #include "pagespeed/kernel/html/html_writer_filter.h" |
| |
| namespace net_instaweb { |
| |
| class HtmlCdataNode; |
| class HtmlCharactersNode; |
| class HtmlCommentNode; |
| class HtmlDirectiveNode; |
| class HtmlElement; |
| class HtmlIEDirectiveNode; |
| class RewriteDriver; |
| |
| // This rewriter allows only the raw characters between the tags to be written. |
| // Following tags are entirely deleted by this filter: |
| // script |
| // style |
| // cdata |
| // directive |
| // iedirective |
| // noscript |
| // This is an experimental rewriter and should be used carefully. |
| class ComputeVisibleTextFilter : public HtmlWriterFilter { |
| public: |
| explicit ComputeVisibleTextFilter(RewriteDriver* rewrite_driver); |
| virtual ~ComputeVisibleTextFilter(); |
| |
| virtual void StartDocument(); |
| virtual void StartElement(HtmlElement* element); |
| virtual void EndElement(HtmlElement* element); |
| virtual void Cdata(HtmlCdataNode* cdata); |
| virtual void Characters(HtmlCharactersNode* characters); |
| virtual void Comment(HtmlCommentNode* comment); |
| virtual void IEDirective(HtmlIEDirectiveNode* directive); |
| virtual void Directive(HtmlDirectiveNode* directive); |
| virtual void EndDocument(); |
| virtual const char* Name() const { return "ComputeVisibleTextFilter"; } |
| |
| private: |
| RewriteDriver* rewrite_driver_; |
| StringWriter writer_; |
| GoogleString buffer_; |
| |
| DISALLOW_COPY_AND_ASSIGN(ComputeVisibleTextFilter); |
| }; |
| |
| } // namespace net_instaweb |
| |
| #endif // NET_INSTAWEB_REWRITER_PUBLIC_COMPUTE_VISIBLE_TEXT_FILTER_H_ |