| /* |
| * Copyright 2010 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: mdsteele@google.com (Matthew D. Steele) |
| |
| #ifndef PAGESPEED_KERNEL_HTML_ELIDE_ATTRIBUTES_FILTER_H_ |
| #define PAGESPEED_KERNEL_HTML_ELIDE_ATTRIBUTES_FILTER_H_ |
| |
| #include <map> |
| #include <set> |
| |
| #include "pagespeed/kernel/html/empty_html_filter.h" |
| #include "pagespeed/kernel/html/html_name.h" |
| #include "pagespeed/kernel/base/basictypes.h" |
| |
| namespace net_instaweb { |
| class HtmlElement; |
| class HtmlParse; |
| |
| // Remove attributes and attribute values that can be safely elided. |
| class ElideAttributesFilter : public EmptyHtmlFilter { |
| public: |
| explicit ElideAttributesFilter(HtmlParse* html_parse); |
| virtual ~ElideAttributesFilter(); |
| |
| virtual void StartElement(HtmlElement* element); |
| virtual const char* Name() const { return "ElideAttributes"; } |
| |
| private: |
| struct AttrValue { |
| const char* attr_value; |
| bool requires_version_5; // Default value only exists in (X)HTML 5. |
| }; |
| |
| typedef std::set<HtmlName::Keyword> KeywordSet; |
| typedef std::map<HtmlName::Keyword, KeywordSet> KeywordSetMap; |
| typedef std::map<HtmlName::Keyword, AttrValue> ValueMap; |
| typedef std::map<HtmlName::Keyword, ValueMap> ValueMapMap; |
| |
| HtmlParse* html_parse_; |
| KeywordSetMap one_value_attrs_map_; // tag/attrs with only one possible value |
| ValueMapMap default_value_map_; // tag/attrs with default values |
| |
| DISALLOW_COPY_AND_ASSIGN(ElideAttributesFilter); |
| }; |
| |
| } // namespace net_instaweb |
| |
| #endif // PAGESPEED_KERNEL_HTML_ELIDE_ATTRIBUTES_FILTER_H_ |