| /* |
| * 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 NET_INSTAWEB_REWRITER_PUBLIC_JS_INLINE_FILTER_H_ |
| #define NET_INSTAWEB_REWRITER_PUBLIC_JS_INLINE_FILTER_H_ |
| |
| #include <cstddef> |
| |
| #include "net/instaweb/rewriter/public/common_filter.h" |
| #include "net/instaweb/rewriter/public/resource.h" |
| #include "net/instaweb/rewriter/public/rewrite_driver.h" |
| #include "net/instaweb/rewriter/public/rewrite_options.h" |
| #include "net/instaweb/rewriter/public/script_tag_scanner.h" |
| #include "pagespeed/kernel/base/basictypes.h" |
| #include "pagespeed/kernel/base/string.h" |
| #include "pagespeed/kernel/base/string_util.h" |
| #include "pagespeed/kernel/http/semantic_type.h" |
| |
| namespace net_instaweb { |
| class HtmlElement; |
| class HtmlCharactersNode; |
| class Statistics; |
| class Variable; |
| |
| // Inline small Javascript files. |
| class JsInlineFilter : public CommonFilter { |
| public: |
| static const char kNumJsInlined[]; |
| explicit JsInlineFilter(RewriteDriver* driver); |
| virtual ~JsInlineFilter(); |
| |
| virtual void StartDocumentImpl(); |
| virtual void EndDocument(); |
| virtual void StartElementImpl(HtmlElement* element); |
| virtual void EndElementImpl(HtmlElement* element); |
| virtual void Characters(HtmlCharactersNode* characters); |
| virtual const char* Name() const { return "InlineJs"; } |
| // Inlining javascript from unauthorized domains into HTML is considered |
| // safe because it does not cause any new content to be executed compared |
| // to the unoptimized page. |
| virtual RewriteDriver::InlineAuthorizationPolicy AllowUnauthorizedDomain() |
| const { |
| return driver()->options()->HasInlineUnauthorizedResourceType( |
| semantic_type::kScript) ? |
| RewriteDriver::kInlineUnauthorizedResources : |
| RewriteDriver::kInlineOnlyAuthorizedResources; |
| } |
| virtual bool IntendedForInlining() const { return true; } |
| |
| static void InitStats(Statistics* statistics); |
| |
| private: |
| class Context; |
| friend class Context; |
| |
| bool ShouldInline(const ResourcePtr& resource, GoogleString* reason) const; |
| void RenderInline(const ResourcePtr& resource, const StringPiece& text, |
| HtmlElement* element); |
| |
| const size_t size_threshold_bytes_; |
| ScriptTagScanner script_tag_scanner_; |
| |
| // This is set to true during StartElement() for a <script> tag that we |
| // should maybe inline, but may be set back to false by Characters(). If it |
| // is still true when we hit the corresponding EndElement(), then we'll |
| // inline the script (and set it back to false). It should never be true |
| // outside of <script> and </script>. |
| bool should_inline_; |
| |
| Variable* num_js_inlined_; |
| |
| DISALLOW_COPY_AND_ASSIGN(JsInlineFilter); |
| }; |
| |
| } // namespace net_instaweb |
| |
| #endif // NET_INSTAWEB_REWRITER_PUBLIC_JS_INLINE_FILTER_H_ |