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// Copyright 2008, 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.
// Describes a class that can represent the information displayed in a history
// view; that is, a list of visited pages. This object knows how to
// talk to the HistoryService to update its state.
#ifndef CHROME_BROWSER_HISTORY_MODEL_H__
#define CHROME_BROWSER_HISTORY_MODEL_H__
#include "chrome/browser/base_history_model.h"
#include "chrome/common/notification_service.h"
typedef BaseHistoryModelObserver HistoryModelObserver;
class HistoryModel : public BaseHistoryModel,
public NotificationObserver {
public:
HistoryModel(Profile* profile, const std::wstring& search_text);
virtual ~HistoryModel();
// BaseHistoryModel methods (see BaseHistoryModel for description).
virtual int GetItemCount();
virtual Time GetVisitTime(int index);
virtual const std::wstring& GetTitle(int index);
virtual const GURL& GetURL(int index);
virtual history::URLID GetURLID(int index);
virtual bool IsStarred(int index);
virtual const Snippet& GetSnippet(int index);
virtual void RemoveFromModel(int start, int length);
// Sets the new value of the search text, and requeries if the new value
// is different from the previous value.
virtual void SetSearchText(const std::wstring& search_text);
// Returns the search text.
virtual const std::wstring& GetSearchText() const { return search_text_; }
// Change the starred state of a given index.
virtual void SetPageStarred(int index, bool state);
// To be called when the user wants to manually refresh this view.
virtual void Refresh();
// NotificationObserver implementation. If the type is NOTIFY_URLS_STARRED,
// the model is updated appropriately.
virtual void Observe(NotificationType type,
const NotificationSource& source,
const NotificationDetails& details);
private:
// Initiates a request for the current visit list.
void InitVisitRequest(int depth);
// Callback for visited page requests of the history system.
void VisitedPagesQueryComplete(HistoryService::Handle request_handle,
history::QueryResults* results);
// Sets the starred state of each instance of the given URL in the result set
// to the given value. Returns true if anything was updated.
bool UpdateStarredStateOfURL(const GURL& url, bool is_starred);
// The current search string.
std::wstring search_text_;
// Contents of the current query.
history::QueryResults results_;
// We lazily ask the BookmarkBarModel for whether a URL is starred. This
// enum gives the state of a particular entry.
enum StarState {
UNKNOWN = 0, // Indicates we haven't determined the state yet.
STARRED,
NOT_STARRED
};
// star_state_ has an entry for each element of results_ indicating whether
// the URL is starred.
scoped_array<StarState> star_state_;
// How many months back the current query has gone.
int search_depth_;
// The time that the current query was started.
Time search_start_;
DISALLOW_EVIL_CONSTRUCTORS(HistoryModel);
};
#endif // CHROME_BROWSER_HISTORY_MODEL_H__
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