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| 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include "chrome/browser/sync/sessions/ordered_commit_set.h" | |
| 6 | |
| 7 #include <algorithm> | |
| 8 | |
| 9 #include "base/logging.h" | |
| 10 | |
| 11 namespace browser_sync { | |
| 12 namespace sessions { | |
| 13 | |
| 14 OrderedCommitSet::OrderedCommitSet( | |
| 15 const browser_sync::ModelSafeRoutingInfo& routes) | |
| 16 : routes_(routes) { | |
| 17 } | |
| 18 | |
| 19 OrderedCommitSet::~OrderedCommitSet() {} | |
| 20 | |
| 21 void OrderedCommitSet::AddCommitItem(const int64 metahandle, | |
| 22 const syncable::Id& commit_id, | |
| 23 syncable::ModelType type) { | |
| 24 if (!HaveCommitItem(metahandle)) { | |
| 25 inserted_metahandles_.insert(metahandle); | |
| 26 metahandle_order_.push_back(metahandle); | |
| 27 commit_ids_.push_back(commit_id); | |
| 28 projections_[GetGroupForModelType(type, routes_)].push_back( | |
| 29 commit_ids_.size() - 1); | |
| 30 types_.push_back(type); | |
| 31 } | |
| 32 } | |
| 33 | |
| 34 void OrderedCommitSet::Append(const OrderedCommitSet& other) { | |
| 35 for (int i = 0; i < other.Size(); ++i) { | |
| 36 CommitItem item = other.GetCommitItemAt(i); | |
| 37 AddCommitItem(item.meta, item.id, item.group); | |
| 38 } | |
| 39 } | |
| 40 | |
| 41 void OrderedCommitSet::AppendReverse(const OrderedCommitSet& other) { | |
| 42 for (int i = other.Size() - 1; i >= 0; i--) { | |
| 43 CommitItem item = other.GetCommitItemAt(i); | |
| 44 AddCommitItem(item.meta, item.id, item.group); | |
| 45 } | |
| 46 } | |
| 47 | |
| 48 void OrderedCommitSet::Truncate(size_t max_size) { | |
| 49 if (max_size < metahandle_order_.size()) { | |
| 50 for (size_t i = max_size; i < metahandle_order_.size(); ++i) { | |
| 51 inserted_metahandles_.erase(metahandle_order_[i]); | |
| 52 } | |
| 53 | |
| 54 // Some projections may refer to indices that are getting chopped. | |
| 55 // Since projections are in increasing order, it's easy to fix. Except | |
| 56 // that you can't erase(..) using a reverse_iterator, so we use binary | |
| 57 // search to find the chop point. | |
| 58 Projections::iterator it = projections_.begin(); | |
| 59 for (; it != projections_.end(); ++it) { | |
| 60 // For each projection, chop off any indices larger than or equal to | |
| 61 // max_size by looking for max_size using binary search. | |
| 62 Projection& p = it->second; | |
| 63 Projection::iterator element = std::lower_bound(p.begin(), p.end(), | |
| 64 max_size); | |
| 65 if (element != p.end()) | |
| 66 p.erase(element, p.end()); | |
| 67 } | |
| 68 commit_ids_.resize(max_size); | |
| 69 metahandle_order_.resize(max_size); | |
| 70 types_.resize(max_size); | |
| 71 } | |
| 72 } | |
| 73 | |
| 74 OrderedCommitSet::CommitItem OrderedCommitSet::GetCommitItemAt( | |
| 75 const int position) const { | |
| 76 DCHECK(position < Size()); | |
| 77 CommitItem return_item = {metahandle_order_[position], | |
| 78 commit_ids_[position], | |
| 79 types_[position]}; | |
| 80 return return_item; | |
| 81 } | |
| 82 | |
| 83 bool OrderedCommitSet::HasBookmarkCommitId() const { | |
| 84 ModelSafeRoutingInfo::const_iterator group | |
| 85 = routes_.find(syncable::BOOKMARKS); | |
| 86 if (group == routes_.end()) | |
| 87 return false; | |
| 88 Projections::const_iterator proj = projections_.find(group->second); | |
| 89 if (proj == projections_.end()) | |
| 90 return false; | |
| 91 DCHECK_LE(proj->second.size(), types_.size()); | |
| 92 for (size_t i = 0; i < proj->second.size(); i++) { | |
| 93 if (types_[proj->second[i]] == syncable::BOOKMARKS) | |
| 94 return true; | |
| 95 } | |
| 96 return false; | |
| 97 } | |
| 98 | |
| 99 void OrderedCommitSet::operator=(const OrderedCommitSet& other) { | |
| 100 inserted_metahandles_ = other.inserted_metahandles_; | |
| 101 commit_ids_ = other.commit_ids_; | |
| 102 metahandle_order_ = other.metahandle_order_; | |
| 103 projections_ = other.projections_; | |
| 104 types_ = other.types_; | |
| 105 routes_ = other.routes_; | |
| 106 } | |
| 107 | |
| 108 } // namespace sessions | |
| 109 } // namespace browser_sync | |
| 110 | |
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