Revert 56962 - Next step integrating the HistoryQuickProvider: Implement inde...

chrome/browser/history/in_memory_url_index.cc

 // Copyright (c) 2010 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.
 
 #include "chrome/browser/history/in_memory_url_index.h"
 
-#include <algorithm>
-#include <limits>
-
-#include "app/l10n_util.h"
-#include "base/i18n/word_iterator.h"
-#include "base/string_util.h"
-#include "base/time.h"
-#include "base/utf_string_conversions.h"
 #include "chrome/browser/history/url_database.h"
-#include "net/base/escape.h"
-#include "net/base/net_util.h"
-
-using base::Time;
-using base::TimeDelta;
 
 namespace history {
 
-InMemoryURLIndex::InMemoryURLIndex() : history_item_count_(0) {}
-
-InMemoryURLIndex::~InMemoryURLIndex() {}
-
 // Indexing
 
-bool InMemoryURLIndex::Init(history::URLDatabase* history_db,
-                            const string16& languages) {
-  // TODO(mrossetti): Register for profile/language change notifications.
-  languages_ = languages;
-  // Reset our indexes.
-  char_word_map_.clear();
-  word_id_history_map_.clear();
-  if (!history_db)
-    return false;
-  URLDatabase::URLEnumerator history_enum;
-  if (history_db->InitURLEnumeratorForEverything(&history_enum)) {
-    URLRow row;
-    Time recent_threshold = InMemoryURLIndex::RecentThreshold();
-    while (history_enum.GetNextURL(&row)) {
-      // Do some filtering so that we only get history items which could
-      // possibly pass the HistoryURLProvider::CullPoorMatches filter later.
-      if ((row.typed_count() > kLowQualityMatchTypedLimit) ||
-          (row.visit_count() > kLowQualityMatchVisitLimit) ||
-          (row.last_visit() >= recent_threshold)) {
-        if (!IndexRow(row))
-          return false;
-      }
-    }
-  }
-  return true;
-}
-
-bool InMemoryURLIndex::IndexRow(URLRow row) {
-  const GURL& gurl(row.url());
-  string16 url(WideToUTF16(net::FormatUrl(gurl, UTF16ToWide(languages_),
-      net::kFormatUrlOmitUsernamePassword,
-      UnescapeRule::SPACES | UnescapeRule::URL_SPECIAL_CHARS, NULL, NULL,
-      NULL)));
-
-  // TODO(mrossetti): Find or implement a ConvertPercentEncoding and use it
-  // on the url.
-
-  // TODO(mrossetti): Detect row_id > std::numeric_limits<HistoryID>::max().
-  HistoryID history_id = static_cast<HistoryID>(row.id());
-
-  // Add the row for quick lookup in the history info store.
-  url = l10n_util::ToLower(url);
-  URLRow new_row(GURL(url), row.id());
-  new_row.set_visit_count(row.visit_count());
-  new_row.set_typed_count(row.typed_count());
-  new_row.set_last_visit(row.last_visit());
-  new_row.set_title(row.title());
-  history_info_map_.insert(std::make_pair(history_id, new_row));
-
-  // Split into individual, unique words.
-  String16Set words = WordsFromString16(url);
-
-  // For each word, add a new entry into the word index referring to the
-  // associated history item.
-  for (String16Set::iterator iter = words.begin();
-       iter != words.end(); ++iter) {
-    String16Set::value_type uni_word = *iter;
-    AddWordToIndex(uni_word, history_id);
-  }
-  ++history_item_count_;
-  return true;
-}
-
-// Utility Functions
-
-InMemoryURLIndex::String16Set InMemoryURLIndex::WordsFromString16(
-    const string16& uni_string) {
-  String16Set words;
-
-  // TODO(mrossetti): Replace all | and _'s with a space, all % quoted
-  // characters with real characters, and break into words, using
-  // appropriate string16 functions.
-  WordIterator iter(&uni_string, WordIterator::BREAK_WORD);
-  if (iter.Init()) {
-    while (iter.Advance()) {
-      if (iter.IsWord()) {
-        words.insert(iter.GetWord());
-      }
-    }
-  }
-  return words;
-}
-
-InMemoryURLIndex::Char16Set InMemoryURLIndex::CharactersFromString16(
-    const string16& uni_word) {
-  Char16Set characters;
-  for (string16::const_iterator iter = uni_word.begin();
-       iter != uni_word.end(); ++iter)
-    characters.insert(*iter);
-  return characters;
-}
-
-void InMemoryURLIndex::AddWordToIndex(const string16& uni_word,
-                                      HistoryID history_id) {
-  WordMap::iterator word_pos = word_map_.find(uni_word);
-  if (word_pos != word_map_.end())
-    UpdateWordHistory(word_pos->second, history_id);
-  else
-    AddWordHistory(uni_word, history_id);
-}
-
-void InMemoryURLIndex::UpdateWordHistory(WordID word_id, HistoryID history_id) {
-    WordIDHistoryMap::iterator history_pos = word_id_history_map_.find(word_id);
-    DCHECK(history_pos != word_id_history_map_.end());
-    HistoryIDSet& history_id_set(history_pos->second);
-    history_id_set.insert(history_id);
-}
-
-// Add a new word to the word list and the word map, and then create a
-// new entry in the word/history map.
-void InMemoryURLIndex::AddWordHistory(const string16& uni_word,
-                                      HistoryID history_id) {
-  word_list_.push_back(uni_word);
-  WordID word_id = word_list_.size() - 1;
-  DCHECK(word_map_.insert(std::make_pair(uni_word, word_id)).second);
-  HistoryIDSet history_id_set;
-  history_id_set.insert(history_id);
-  DCHECK(word_id_history_map_.insert(
-      std::make_pair(word_id, history_id_set)).second);
-  // For each character in the newly added word (i.e. a word that is not
-  // already in the word index), add the word to the character index.
-  Char16Set characters = CharactersFromString16(uni_word);
-  for (Char16Set::iterator uni_char_iter = characters.begin();
-       uni_char_iter != characters.end(); ++uni_char_iter) {
-    Char16Set::value_type uni_string = *uni_char_iter;
-    CharWordIDMap::iterator char_iter = char_word_map_.find(uni_string);
-    if (char_iter != char_word_map_.end()) {
-      // Update existing entry in the char/word index.
-      WordIDSet& word_id_set(char_iter->second);
-      word_id_set.insert(word_id);
-    } else {
-      // Create a new entry in the char/word index.
-      WordIDSet word_id_set;
-      word_id_set.insert(word_id);
-      DCHECK(char_word_map_.insert(std::make_pair(uni_string,
-          word_id_set)).second);
-    }
-  }
-}
-
-// static
-Time InMemoryURLIndex::RecentThreshold() {
-  return Time::Now() - TimeDelta::FromDays(kLowQualityMatchAgeLimitInDays);
+bool InMemoryURLIndex::Init(history::URLDatabase* history_db) {
+  bool success = true;
+  // TODO(mrossetti): Implement.
+  return success;
 }
 
 }  // namespace history