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// Copyright (c) 2012 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 ANDROID_WEBVIEW_BROWSER_FIND_HELPER_H_
#define ANDROID_WEBVIEW_BROWSER_FIND_HELPER_H_
#include "base/memory/weak_ptr.h"
#include "content/public/browser/web_contents_observer.h"
namespace android_webview {
// Handles the WebView find-in-page API requests.
class FindHelper : public content::WebContentsObserver {
public:
class Listener {
public:
// Called when receiving a new find-in-page update.
// This will be triggered when the results of FindAllSync, FindAllAsync and
// FindNext are available. The value provided in active_ordinal is 0-based.
virtual void OnFindResultReceived(int active_ordinal,
int match_count,
bool finished) = 0;
virtual ~Listener() {}
};
explicit FindHelper(content::WebContents* web_contents);
~FindHelper() override;
// Sets the listener to receive find result updates.
// Does not own the listener and must set to NULL when invalid.
void SetListener(Listener* listener);
// Asynchronous API.
void FindAllAsync(const base::string16& search_string);
void HandleFindReply(int request_id,
int match_count,
int active_ordinal,
bool finished);
// Methods valid in both synchronous and asynchronous modes.
void FindNext(bool forward);
void ClearMatches();
private:
void StartNewRequest(const base::string16& search_string);
void NotifyResults(int active_ordinal, int match_count, bool finished);
// Listener results are reported to.
Listener* listener_;
// Used to check the validity of FindNext operations.
bool async_find_started_;
bool sync_find_started_;
// Used to provide different ids to each request and for result
// verification in asynchronous calls.
int find_request_id_counter_;
int current_request_id_;
// Required by FindNext and the incremental find replies.
base::string16 last_search_string_;
int last_match_count_;
int last_active_ordinal_;
// Used to post synchronous result notifications to ourselves.
base::WeakPtrFactory<FindHelper> weak_factory_;
DISALLOW_COPY_AND_ASSIGN(FindHelper);
};
} // namespace android_webview
#endif // ANDROID_WEBVIEW_BROWSER_FIND_HELPER_H_
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