Add chrome to the repository.

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@15 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 112 insertions, 0 deletions

diff --git a/chrome/browser/history/visitsegment_database.h b/chrome/browser/history/visitsegment_database.h
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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.
+
+#ifndef CHROME_BROWSER_HISTORY_VISITSEGMENT_DATABASE_H__
+#define CHROME_BROWSER_HISTORY_VISITSEGMENT_DATABASE_H__
+
+#include "base/basictypes.h"
+#include "chrome/browser/history/history_types.h"
+
+class PageUsageData;
+struct sqlite3;
+class SqliteStatementCache;
+
+namespace history {
+
+// Tracks pages used for the most visited view.
+class VisitSegmentDatabase {
+ public:
+  // Must call InitSegmentTables before using any other part of this class.
+  VisitSegmentDatabase();
+  virtual ~VisitSegmentDatabase();
+
+  // Compute a segment name given a URL. The segment name is currently the
+  // source url spec less some information such as query strings.
+  static std::string ComputeSegmentName(const GURL& url);
+
+  // Returns the ID of the segment with the corresponding name, or 0 if there
+  // is no segment with that name.
+  SegmentID GetSegmentNamed(const std::string& segment_name);
+
+  // Update the segment identified by |out_segment_id| with the provided URL ID.
+  // The URL identifies the page that will now represent the segment. If url_id
+  // is non zero, it is assumed to be the row id of |url|.
+  bool UpdateSegmentRepresentationURL(SegmentID segment_id,
+                                      URLID url_id);
+
+  // Return the ID of the URL currently used to represent this segment or 0 if
+  // an error occured.
+  URLID GetSegmentRepresentationURL(SegmentID segment_id);
+
+  // Create a segment for the provided URL ID with the given name. Returns the
+  // ID of the newly created segment, or 0 on failure.
+  SegmentID CreateSegment(URLID url_id, const std::string& segment_name);
+
+  // Increase the segment visit count by the provided amount. Return true on
+  // success.
+  bool IncreaseSegmentVisitCount(SegmentID segment_id, const Time& ts,
+                                 int amount);
+
+  // Compute the segment usage since |from_time| using the provided aggregator.
+  // A PageUsageData is added in |result| for the nine highest-scored segments.
+  void QuerySegmentUsage(const Time& from_time,
+                         std::vector<PageUsageData*>* result);
+
+  // Delete all the segment usage data which is older than the provided time
+  // stamp.
+  void DeleteSegmentData(const Time& older_than);
+
+  // Change the presentation id for the segment identified by |segment_id|
+  void SetSegmentPresentationIndex(SegmentID segment_id, int index);
+
+  // Delete the segment currently using the provided url for representation.
+  // This will also delete any associated segment usage data.
+  bool DeleteSegmentForURL(URLID url_id);
+
+ protected:
+  // Returns the database and statement cache for the functions in this
+  // interface. The decendent of this class implements these functions to
+  // return its objects.
+  virtual sqlite3* GetDB() = 0;
+  virtual SqliteStatementCache& GetStatementCache() = 0;
+
+  // Creates the tables used by this class if necessary. Returns true on
+  // success.
+  bool InitSegmentTables();
+
+  // Deletes all the segment tables, returning true on success.
+  bool DropSegmentTables();
+
+ private:
+  DISALLOW_EVIL_CONSTRUCTORS(VisitSegmentDatabase);
+};
+
+}  // namespace history
+
+#endif  // CHROME_BROWSER_HISTORY_VISITSEGMENT_DATABASE_H__