Index: third_party/WebKit/Source/web/WebPageProblemDetector.h |
diff --git a/third_party/WebKit/Source/web/WebPageProblemDetector.h b/third_party/WebKit/Source/web/WebPageProblemDetector.h |
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+/* |
+ * Copyright (C) 2017 Google Inc. All rights reserved. |
+ * |
+ * Redistribution and use in source and binary forms, with or without |
+ * modification, are permitted provided that the following conditions are |
+ * met: |
+ * |
+ * * Redistributions of source code must retain the above copyright |
+ * notice, this list of conditions and the following disclaimer. |
+ * * Redistributions in binary form must reproduce the above |
+ * copyright notice, this list of conditions and the following disclaimer |
+ * in the documentation and/or other materials provided with the |
+ * distribution. |
+ * * Neither the name of Google Inc. nor the names of its |
+ * contributors may be used to endorse or promote products derived from |
+ * this software without specific prior written permission. |
+ * |
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
+ */ |
+ |
+#ifndef WebPageProblemDetector_h |
+#define WebPageProblemDetector_h |
+ |
+#include <memory> |
+#include <vector> |
+ |
+namespace blink { |
+ |
+class Node; |
+ |
+// Interface for individual web page problem detector, which will be called |
+// through MHTMLFrameSerializerDelegate on each of the node during DOM walking |
+// when serializing a page as MHTML. |
+class WebPageProblemDetector { |
+ public: |
+ // Visits a node in the DOM tree. |
+ virtual void VisitNode(const Node*) = 0; |
+ // Called when the visiting finishes. |
+ virtual void VisitingDone() = 0; |
+}; |
+ |
+// Holds all problem detectors so we can visit all of them. |
+class WebPageProblemDetectorCollection : public WebPageProblemDetector { |
+ public: |
+ // Used to register a problem detector. |
+ void AddDetector(std::unique_ptr<WebPageProblemDetector>); |
+ |
+ // When we are visiting a node, call all registered problem observers and give |
+ // them an opportunity to examine the node. |
+ void VisitNode(const Node*) override; |
+ |
+ // When the DOM walk is over, give each detector a chance to compute and |
+ // report results. |
+ void VisitingDone() override; |
+ |
+ private: |
+ std::vector<std::unique_ptr<WebPageProblemDetector>> detectors_; |
+}; |
+ |
+// A class which tries to gather information to determine if a page can be |
+// treated as a blank page during page serialization as MHTML. |
+class BlankPageDetector : public WebPageProblemDetector { |
+ void VisitNode(const Node*) override; |
+ void VisitingDone() override; |
+}; |
+ |
+// A class which tries to gather information about number of missing images of a |
+// page during page serialization as MHTML. |
+class MissingImageDetector : public WebPageProblemDetector { |
Pete Williamson
2017/05/17 00:31:48
Let's move this and the CSS detector into their ow
romax
2017/05/17 22:28:19
Done.
|
+ public: |
+ void VisitNode(const Node*) override; |
+ void VisitingDone() override; |
+}; |
+ |
+// A class which tries to gather information about if the page is missing CSS |
+// files during page serialization as MHTML. |
+class MissingCSSDetector : public WebPageProblemDetector { |
+ public: |
+ void VisitNode(const Node*) override; |
+ void VisitingDone() override; |
+}; |
+ |
+} // namespace blink |
+#endif // WebPageProblemDetector_h |