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// Copyright (c) 2006-2008 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.
// 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_observer.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 base::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 BookmarkModel 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.
base::Time search_start_;
DISALLOW_COPY_AND_ASSIGN(HistoryModel);
};
#endif // CHROME_BROWSER_HISTORY_MODEL_H_
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