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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 CHROME_BROWSER_CUSTOM_HOME_PAGES_TABLE_MODEL_H_
#define CHROME_BROWSER_CUSTOM_HOME_PAGES_TABLE_MODEL_H_
#include <string>
#include <vector>
#include "base/compiler_specific.h"
#include "base/macros.h"
#include "base/task/cancelable_task_tracker.h"
#include "components/history/core/browser/history_types.h"
#include "ui/base/models/table_model.h"
class Browser;
class GURL;
class Profile;
namespace history {
class URLRow;
}
namespace ui {
class TableModelObserver;
}
// CustomHomePagesTableModel is the model for the TableView showing the list
// of pages the user wants opened on startup.
class CustomHomePagesTableModel : public ui::TableModel {
public:
explicit CustomHomePagesTableModel(Profile* profile);
~CustomHomePagesTableModel() override;
// Sets the set of urls that this model contains.
void SetURLs(const std::vector<GURL>& urls);
// Collect all entries indexed by |index_list|, and moves them to be right
// before the element addressed by |insert_before|. Used by Drag&Drop.
// Expects |index_list| to be ordered ascending.
void MoveURLs(int insert_before, const std::vector<int>& index_list);
// Adds an entry at the specified index.
void Add(int index, const GURL& url);
// Removes the entry at the specified index.
void Remove(int index);
// Clears any entries and fills the list with pages currently opened in the
// browser.
void SetToCurrentlyOpenPages();
// Returns the set of urls this model contains.
std::vector<GURL> GetURLs();
// TableModel overrides:
int RowCount() override;
base::string16 GetText(int row, int column_id) override;
base::string16 GetTooltip(int row) override;
void SetObserver(ui::TableModelObserver* observer) override;
private:
// Each item in the model is represented as an Entry. Entry stores the URL
// and title of the page.
struct Entry;
// Returns false if pages from |browser| should not be considered.
bool ShouldIncludeBrowser(Browser* browser);
// Loads the title for the specified entry.
void LoadTitle(Entry* entry);
// Loads all the titles, notifies the observer of the change once all loads
// are complete.
void LoadAllTitles();
// Callback from history service. Updates the title of the Entry whose
// |url| matches |entry_url| and notifies the observer of the change if
// |observable| is true.
void OnGotTitle(const GURL& entry_url,
bool observable,
bool found_url,
const history::URLRow& row,
const history::VisitVector& visits);
// Like OnGotTitle, except that num_outstanding_title_lookups_ is decremented
// and if the count reaches zero the observer is notifed.
void OnGotOneOfManyTitles(const GURL& entry_url,
bool found_url,
const history::URLRow& row,
const history::VisitVector& visits);
// Adds an entry at the specified index, but doesn't load the title or tell
// the observer.
void AddWithoutNotification(int index, const GURL& url);
// Removes the entry at the specified index, but doesn't tell the observer.
void RemoveWithoutNotification(int index);
// Returns the URL for a particular row, formatted for display to the user.
base::string16 FormattedURL(int row) const;
// Set of entries we're showing.
std::vector<Entry> entries_;
// Profile used to load titles.
Profile* profile_;
ui::TableModelObserver* observer_;
// Used in loading titles.
base::CancelableTaskTracker task_tracker_;
// Used to keep track of when it's time to update the observer when loading
// multiple titles.
int num_outstanding_title_lookups_;
DISALLOW_COPY_AND_ASSIGN(CustomHomePagesTableModel);
};
#endif // CHROME_BROWSER_CUSTOM_HOME_PAGES_TABLE_MODEL_H_
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