Revert of Move core web_view code to extensions.

chrome/browser/guest_view/web_view/web_view_find_helper.h

+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CHROME_BROWSER_GUEST_VIEW_WEB_VIEW_WEB_VIEW_FIND_HELPER_H_
+#define CHROME_BROWSER_GUEST_VIEW_WEB_VIEW_WEB_VIEW_FIND_HELPER_H_
+
+#include <map>
+#include <vector>
+
+#include "base/memory/weak_ptr.h"
+#include "base/values.h"
+#include "content/public/browser/web_contents.h"
+#include "third_party/WebKit/public/web/WebFindOptions.h"
+#include "ui/gfx/geometry/rect.h"
+
+namespace extensions {
+class WebViewInternalFindFunction;
+class WebViewGuest;
+
+// Helper class for find requests and replies for the web_view_internal find
+// API.
+class WebViewFindHelper {
+ public:
+  explicit WebViewFindHelper(WebViewGuest* webview_guest);
+  ~WebViewFindHelper();
+
+  // Cancels all find requests in progress and calls their callback functions.
+  void CancelAllFindSessions();
+
+  // Dispatches the |findupdate| event.
+  void DispatchFindUpdateEvent(bool canceled, bool final_update);
+
+  // Ends the find session with id |session_request_id|  and calls the
+  // appropriate callbacks.
+  void EndFindSession(int session_request_id, bool canceled);
+
+  // Helper function for WebViewGuest::Find().
+  void Find(
+      content::WebContents* guest_web_contents,
+      const base::string16& search_text,
+      const blink::WebFindOptions& options,
+      scoped_refptr<WebViewInternalFindFunction> find_function);
+
+  // Helper function for WeViewGuest:FindReply().
+  void FindReply(int request_id,
+                 int number_of_matches,
+                 const gfx::Rect& selection_rect,
+                 int active_match_ordinal,
+                 bool final_update);
+
+ private:
+  // A wrapper to store find results.
+  class FindResults {
+   public:
+    FindResults();
+    ~FindResults();
+
+    // Aggregate the find results.
+    void AggregateResults(int number_of_matches,
+                          const gfx::Rect& selection_rect,
+                          int active_match_ordinal,
+                          bool final_update);
+
+    // Stores find results into a DictionaryValue.
+    void PrepareResults(base::DictionaryValue* results);
+
+   private:
+    int number_of_matches_;
+    int active_match_ordinal_;
+    gfx::Rect selection_rect_;
+
+    friend void WebViewFindHelper::EndFindSession(int session_request_id,
+                                                  bool canceled);
+
+    DISALLOW_COPY_AND_ASSIGN(FindResults);
+  };
+
+  // Stores and processes the results for the |findupdate| event.
+  class FindUpdateEvent {
+   public:
+    explicit FindUpdateEvent(const base::string16& search_text);
+    ~FindUpdateEvent();
+
+    // Aggregate the find results.
+    void AggregateResults(int number_of_matches,
+                          const gfx::Rect& selection_rect,
+                          int active_match_ordinal,
+                          bool final_update);
+
+    // Stores find results and other event info into a DictionaryValue.
+    void PrepareResults(base::DictionaryValue* results);
+
+   private:
+    const base::string16 search_text_;
+    FindResults find_results_;
+
+    DISALLOW_COPY_AND_ASSIGN(FindUpdateEvent);
+  };
+
+  // Handles all information about a find request and its results.
+  class FindInfo {
+   public:
+    FindInfo(
+        int request_id,
+        const base::string16& search_text,
+        const blink::WebFindOptions& options,
+        scoped_refptr<WebViewInternalFindFunction> find_function);
+    ~FindInfo();
+
+    // Add another request to |find_next_requests_|.
+    void AddFindNextRequest(const base::WeakPtr<FindInfo>& request) {
+      find_next_requests_.push_back(request);
+    }
+
+    // Aggregate the find results.
+    void AggregateResults(int number_of_matches,
+                          const gfx::Rect& selection_rect,
+                          int active_match_ordinal,
+                          bool final_update);
+
+    base::WeakPtr<FindInfo> AsWeakPtr();
+
+    blink::WebFindOptions* options() {
+      return &options_;
+    }
+
+    bool replied() {
+      return replied_;
+    }
+
+    int request_id() {
+      return request_id_;
+    }
+
+    const base::string16& search_text() {
+      return search_text_;
+    }
+
+    // Calls the callback function within |find_function_| with the find results
+    // from within |find_results_|.
+    void SendResponse(bool canceled);
+
+   private:
+    const int request_id_;
+    const base::string16 search_text_;
+    blink::WebFindOptions options_;
+    scoped_refptr<WebViewInternalFindFunction> find_function_;
+    FindResults find_results_;
+
+    // A find reply has been received for this find request.
+    bool replied_;
+
+    // Stores pointers to all the find next requests if this is the first
+    // request of a find session.
+    std::vector<base::WeakPtr<FindInfo> > find_next_requests_;
+
+    // Weak pointer used to access the find info of fin.
+    base::WeakPtrFactory<FindInfo> weak_ptr_factory_;
+
+    friend void WebViewFindHelper::EndFindSession(int session_request_id,
+                                                  bool canceled);
+
+    DISALLOW_COPY_AND_ASSIGN(FindInfo);
+  };
+
+  // Pointer to the webview that is being helped.
+  WebViewGuest* const webview_guest_;
+
+  // A counter to generate a unique request id for a find request.
+  // We only need the ids to be unique for a given WebViewGuest.
+  int current_find_request_id_;
+
+  // Stores aggregated find results and other info for the |findupdate| event.
+  scoped_ptr<FindUpdateEvent> find_update_event_;
+
+  // Pointer to the first request of the current find session.
+  linked_ptr<FindInfo> current_find_session_;
+
+  // Stores each find request's information by request_id so that its callback
+  // function can be called when its find results are available.
+  typedef std::map<int, linked_ptr<FindInfo> > FindInfoMap;
+  FindInfoMap find_info_map_;
+
+  DISALLOW_COPY_AND_ASSIGN(WebViewFindHelper);
+};
+
+} // namespace extensions
+
+#endif  // CHROME_BROWSER_GUEST_VIEW_WEB_VIEW_WEB_VIEW_FIND_HELPER_H_