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Diffstat (limited to 'chrome/browser/history_model.cc')
| -rw-r--r-- | chrome/browser/history_model.cc | 298 |
1 files changed, 298 insertions, 0 deletions
diff --git a/chrome/browser/history_model.cc b/chrome/browser/history_model.cc new file mode 100644 index 0000000..80088d6 --- /dev/null +++ b/chrome/browser/history_model.cc @@ -0,0 +1,298 @@ +// 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. + +#include "chrome/browser/history_model.h" + +#include "chrome/browser/bookmark_bar_model.h" +#include "chrome/browser/profile.h" + +// The max number of results to retrieve when browsing user's history. +static const int kMaxBrowseResults = 800; + +// The max number of search results to retrieve. +static const int kMaxSearchResults = 100; + +HistoryModel::HistoryModel(Profile* profile, const std::wstring& search_text) + : BaseHistoryModel(profile), + search_text_(search_text), + search_depth_(0) { + // Register for notifications about URL starredness changing on this profile. + NotificationService::current()-> + AddObserver(this, NOTIFY_URLS_STARRED, + Source<Profile>(profile->GetOriginalProfile())); + NotificationService::current()-> + AddObserver(this, NOTIFY_HISTORY_URLS_DELETED, + Source<Profile>(profile->GetOriginalProfile())); +} + +HistoryModel::~HistoryModel() { + // Unregister for notifications about URL starredness. + NotificationService::current()-> + RemoveObserver(this, NOTIFY_URLS_STARRED, + Source<Profile>(profile_->GetOriginalProfile())); + NotificationService::current()-> + RemoveObserver(this, NOTIFY_HISTORY_URLS_DELETED, + Source<Profile>(profile_->GetOriginalProfile())); +} + +int HistoryModel::GetItemCount() { + return static_cast<int>(results_.size()); +} + +Time HistoryModel::GetVisitTime(int index) { +#ifndef NDEBUG + DCHECK(IsValidIndex(index)); +#endif + return results_[index].visit_time(); +} + +const std::wstring& HistoryModel::GetTitle(int index) { + return results_[index].title(); +} + +const GURL& HistoryModel::GetURL(int index) { + return results_[index].url(); +} + +history::URLID HistoryModel::GetURLID(int index) { + return results_[index].id(); +} + +bool HistoryModel::IsStarred(int index) { + return results_[index].starred(); +} + +const Snippet& HistoryModel::GetSnippet(int index) { + return results_[index].snippet(); +} + +void HistoryModel::RemoveFromModel(int start, int length) { + DCHECK(start >= 0 && start + length <= GetItemCount()); + results_.DeleteRange(start, start + length); + if (observer_) + observer_->ModelChanged(true); +} + +void HistoryModel::SetSearchText(const std::wstring& search_text) { + if (search_text == search_text_) + return; + + search_text_ = search_text; + search_depth_ = 0; + Refresh(); +} + +void HistoryModel::InitVisitRequest(int depth) { + HistoryService* history_service = + profile_->GetHistoryService(Profile::EXPLICIT_ACCESS); + if (!history_service) + return; + + AboutToScheduleRequest(); + + history::QueryOptions options; + + // Limit our search so that it doesn't return more than the maximum required + // number of results. + int max_total_results = search_text_.empty() ? + kMaxBrowseResults : kMaxSearchResults; + + if (depth == 0) { + // Set the end time of this first search to null (which will + // show results from the future, should the user's clock have + // been set incorrectly). + options.end_time = Time(); + + search_start_ = Time::Now(); + + // Configure the begin point of the search to the start of the + // current month. + Time::Exploded start_exploded; + search_start_.LocalMidnight().LocalExplode(&start_exploded); + start_exploded.day_of_month = 1; + options.begin_time = Time::FromLocalExploded(start_exploded); + + options.only_starred = false; + options.max_count = max_total_results; + } else { + Time::Exploded exploded; + search_start_.LocalMidnight().LocalExplode(&exploded); + exploded.day_of_month = 1; + + // Set the end-time of this search to the end of the month that is + // |depth| months before the search end point. The end time is not + // inclusive, so we should feel free to set it to midnight on the + // first day of the following month. + exploded.month -= depth - 1; + while (exploded.month < 1) { + exploded.month += 12; + exploded.year--; + } + options.end_time = Time::FromLocalExploded(exploded); + + // Set the begin-time of the search to the start of the month + // that is |depth| months prior to search_start_. + if (exploded.month > 1) { + exploded.month--; + } else { + exploded.month = 12; + exploded.year--; + } + options.begin_time = Time::FromLocalExploded(exploded); + + options.only_starred = false; + + // Subtract off the number of pages we already got. + options.max_count = max_total_results - static_cast<int>(results_.size()); + } + + // This will make us get only one entry for each page. This is definitely + // correct for "starred only" queries, but more debatable for regular + // history queries. We might want to get all of them but then remove adjacent + // duplicates like Mozilla. + // + // We'll still get duplicates across month boundaries, which is probably fine. + options.most_recent_visit_only = true; + + HistoryService::QueryHistoryCallback* callback = + NewCallback(this, &HistoryModel::VisitedPagesQueryComplete); + history_service->QueryHistory(search_text_, options, + &cancelable_consumer_, callback); +} + +void HistoryModel::SetPageStarred(int index, bool state) { + const history::URLResult& result = results_[index]; + if (!UpdateStarredStateOfURL(result.url(), state)) + return; // Nothing was changed. + + if (observer_) + observer_->ModelChanged(false); + + BookmarkBarModel* bb_model = profile_->GetBookmarkBarModel(); + if (bb_model) + bb_model->SetURLStarred(result.url(), result.title(), state); +} + +void HistoryModel::Refresh() { + cancelable_consumer_.CancelAllRequests(); + if (observer_) + observer_->ModelEndWork(); + search_depth_ = 0; + InitVisitRequest(search_depth_); +} + +void HistoryModel::Observe(NotificationType type, + const NotificationSource& source, + const NotificationDetails& details) { + switch (type) { + case NOTIFY_URLS_STARRED: { // Somewhere, a URL has been starred. + Details<history::URLsStarredDetails> starred_state(details); + + // In the degenerate case when there are a lot of pages starred, this may + // be unacceptably slow. + std::set<GURL>::const_iterator i; + bool changed = false; + for (i = starred_state->changed_urls.begin(); + i != starred_state->changed_urls.end(); ++i) { + changed |= UpdateStarredStateOfURL(*i, starred_state->starred); + } + if (changed && observer_) + observer_->ModelChanged(false); + break; + } + + case NOTIFY_HISTORY_URLS_DELETED: + // TODO(brettw) bug 1140015: This should actually update the current query + // rather than re-querying. This should be much more efficient and + // user-friendly. + // + // Note that we can special case when the "all_history" flag is set to just + // clear the view. + Refresh(); + break; + + // TODO(brettw) bug 1140015, 1140017, 1140020: Add a more observers to catch + // title changes, new additions, etc.. Also, URLS_ADDED when that + // notification exists. + + default: + NOTREACHED(); + break; + } +} + +void HistoryModel::VisitedPagesQueryComplete( + HistoryService::Handle request_handle, + history::QueryResults* results) { + bool changed = (results->size() > 0); + if (search_depth_ == 0) { + if (results_.size() > 0) + changed = true; + results_.Swap(results); + } else { + results_.AppendResultsBySwapping(results, true); + } + + is_search_results_ = !search_text_.empty(); + + if (changed && observer_) + observer_->ModelChanged(true); + + search_depth_++; + + int max_results = search_text_.empty() ? + kMaxBrowseResults : kMaxSearchResults; + + // TODO(glen/brettw): bug 1203052 - Need to detect if we've reached the + // end of the user's history. + if (search_depth_ < kHistoryScopeMonths && + static_cast<int>(results_.size()) < max_results) { + InitVisitRequest(search_depth_); + } else { + RequestCompleted(); + } +} + +bool HistoryModel::UpdateStarredStateOfURL(const GURL& url, bool is_starred) { + bool changed = false; + + // See if we've got any of the changed URLs in our results. There may be + // more than once instance of the URL, and we have to update them all. + size_t num_matches; + const size_t* match_indices = results_.MatchesForURL(url, &num_matches); + for (size_t i = 0; i < num_matches; i++) { + // Update the view. (We don't care about the ID, just 0 or nonzero.) + history::URLResult& result = results_[match_indices[i]]; + if (result.starred() != is_starred) { + result.set_star_id(is_starred ? 1 : 0); + changed = true; + } + } + return changed; +}
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