Add chrome to the repository.

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

1 files changed, 127 insertions, 0 deletions

diff --git a/chrome/browser/autocomplete/history_contents_provider.h b/chrome/browser/autocomplete/history_contents_provider.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_AUTOCOMPLETE_HISTORY_CONTENTS_PROVIDER_H__
+#define CHROME_BROWSER_AUTOCOMPLETE_HISTORY_CONTENTS_PROVIDER_H__
+
+#include "chrome/browser/autocomplete/autocomplete.h"
+#include "chrome/browser/history/history.h"
+
+// HistoryContentsProvider is an AutocompleteProvider that provides results from
+// the contents (body and/or title) of previously visited pages.  Results are
+// obtained asynchronously from the history service.
+class HistoryContentsProvider : public AutocompleteProvider {
+ public:
+  HistoryContentsProvider(ACProviderListener* listener, Profile* profile)
+      : AutocompleteProvider(listener, profile, "HistoryContents"),
+        history_service_(NULL),
+        have_results_(false) {
+    DCHECK(profile);
+  }
+
+#ifdef UNIT_TEST
+  HistoryContentsProvider(ACProviderListener* listener,
+                          HistoryService* history_service)
+      : AutocompleteProvider(listener, NULL, "HistoryContents"),
+        history_service_(history_service),
+        have_results_(false) {
+  }
+#endif
+
+  // As necessary asks the history service for the relevant results. When
+  // done SetResults is invoked.
+  virtual void Start(const AutocompleteInput& input,
+                     bool minimal_changes,
+                     bool synchronous_only);
+
+  virtual void Stop();
+
+  // Returns the total number of matches available in the database, up to
+  // kMaxMatchCount, whichever is smaller.
+  // Return value is only valid if done() returns true.
+  size_t db_match_count() const { return db_match_count_; }
+
+  // The maximum match count we'll report. If the db_match_count is greater
+  // than this, it will be clamped to this result.
+  static const int kMaxMatchCount = 50;
+
+ private:
+  void QueryComplete(HistoryService::Handle handle,
+                     history::QueryResults* results);
+
+  // Converts each MatchingPageResult in results_ to an AutocompleteMatch and
+  // adds it to matches_.
+  void ConvertResults();
+
+  // Creates and returns an AutocompleteMatch from a MatchingPageResult.
+  AutocompleteMatch ResultToMatch(const history::URLResult& result,
+                                  int score);
+
+  // Adds ACMatchClassifications to match from the offset positions in
+  // page_result.
+  void ClassifyDescription(const history::URLResult& result,
+                           AutocompleteMatch* match) const;
+
+  // Calculates and returns the relevance of a particular result. See the
+  // chart in autocomplete.h for the list of values this returns.
+  int CalculateRelevance(const history::URLResult& result);
+
+  CancelableRequestConsumerT<int, 0> request_consumer_;
+
+  // This is only non-null for testing, otherwise the HistoryService from the
+  // Profile is used.
+  HistoryService* history_service_;
+
+  // The number of times we're returned each different type of result. These are
+  // used by CalculateRelevance. Initialized in Start.
+  int star_title_count_;
+  int star_contents_count_;
+  int title_count_;
+  int contents_count_;
+
+  // Current autocomplete input type.
+  AutocompleteInput::Type input_type_;
+
+  // Results from most recent query. These are cached so we don't have to
+  // re-issue queries for "minor changes" (which don't affect this provider).
+  history::QueryResults results_;
+
+  // Whether results_ is valid (so we can tell invalid apart from empty).
+  bool have_results_;
+
+  // Current query string.
+  std::wstring query_;
+
+  // Total number of matches available in the database.
+  int db_match_count_;
+
+  DISALLOW_EVIL_CONSTRUCTORS(HistoryContentsProvider);
+};
+
+#endif  // CHROME_BROWSER_AUTOCOMPLETE_HISTORY_CONTENTS_PROVIDER_H__