First implementation of enhanced_bookmark_utils.

These utility functions are used on iOS and Android.

BUG=None

Review URL: https://codereview.chromium.org/452913002

Cr-Commit-Position: refs/heads/master@{#288408}
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@288408 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 127 insertions, 0 deletions

diff --git a/components/enhanced_bookmarks/enhanced_bookmark_utils.cc b/components/enhanced_bookmarks/enhanced_bookmark_utils.cc
new file mode 100644
index 0000000..85415cf
--- /dev/null
+++ b/components/enhanced_bookmarks/enhanced_bookmark_utils.cc
@@ -0,0 +1,127 @@
+// Copyright 2014 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 "components/enhanced_bookmarks/enhanced_bookmark_utils.h"
+
+#include "base/i18n/string_compare.h"
+#include "base/i18n/string_search.h"
+#include "base/strings/utf_string_conversions.h"
+#include "components/bookmarks/browser/bookmark_model.h"
+#include "ui/base/models/tree_node_iterator.h"
+
+namespace enhanced_bookmark_utils {
+
+std::vector<const BookmarkNode*> FindBookmarksWithQuery(
+    BookmarkModel* bookmark_model,
+    const std::string& query) {
+  std::vector<const BookmarkNode*> results;
+  base::string16 query16 = base::UTF8ToUTF16(query);
+  base::i18n::FixedPatternStringSearchIgnoringCaseAndAccents pattern16(query16);
+
+  ui::TreeNodeIterator<const BookmarkNode> iterator(
+      bookmark_model->root_node());
+  while (iterator.has_next()) {
+    const BookmarkNode* node = iterator.Next();
+    if (!node->is_url())
+      continue;
+
+    // Search the title for the query.
+    size_t match_index;
+    size_t match_length;
+    bool found =
+        pattern16.Search(node->GetTitle(), &match_index, &match_length);
+    if (found)
+      results.push_back(node);
+  }
+  return results;
+}
+
+// Comparator used to sort bookmarks. No folders are allowed.
+class BookmarkNameComparator : public std::binary_function<const BookmarkNode*,
+                                                           const BookmarkNode*,
+                                                           bool> {
+ public:
+  explicit BookmarkNameComparator(icu::Collator* collator)
+      : collator_(collator) {}
+
+  // Returns true if |n1| preceeds |n2|.
+  bool operator()(const BookmarkNode* n1, const BookmarkNode* n2) {
+    DCHECK(!n1->is_folder());
+    DCHECK(!n2->is_folder());
+    if (!collator_)
+      return n1->GetTitle() < n2->GetTitle();
+    return base::i18n::CompareString16WithCollator(
+               collator_, n1->GetTitle(), n2->GetTitle()) == UCOL_LESS;
+  }
+
+ private:
+  icu::Collator* collator_;
+};
+
+void SortBookmarksByName(std::vector<const BookmarkNode*>& nodes) {
+  UErrorCode error = U_ZERO_ERROR;
+  scoped_ptr<icu::Collator> collator(icu::Collator::createInstance(error));
+  if (U_FAILURE(error))
+    collator.reset(NULL);
+  std::sort(nodes.begin(), nodes.end(), BookmarkNameComparator(collator.get()));
+}
+
+std::vector<const BookmarkNode*> PrimaryPermanentNodes(BookmarkModel* model) {
+  DCHECK(model->loaded());
+  std::vector<const BookmarkNode*> nodes;
+  nodes.push_back(model->other_node());
+  nodes.push_back(model->mobile_node());
+  return nodes;
+}
+
+std::vector<const BookmarkNode*> RootLevelFolders(BookmarkModel* model) {
+  std::vector<const BookmarkNode*> root_level_folders;
+
+  // Find the direct folder children of the primary permanent nodes.
+  std::vector<const BookmarkNode*> primary_permanent_nodes =
+      PrimaryPermanentNodes(model);
+  for (const BookmarkNode* parent : primary_permanent_nodes) {
+    int child_count = parent->child_count();
+    for (int i = 0; i < child_count; ++i) {
+      const BookmarkNode* node = parent->GetChild(i);
+      if (node->is_folder() && node->IsVisible())
+        root_level_folders.push_back(node);
+    }
+  }
+
+  // Add the bookmark bar if it has children.
+  const BookmarkNode* bb_node = model->bookmark_bar_node();
+  if (bb_node->child_count() > 0)
+    root_level_folders.push_back(bb_node);
+
+  return root_level_folders;
+}
+
+bool IsPrimaryPermanentNode(const BookmarkNode* node, BookmarkModel* model) {
+  std::vector<const BookmarkNode*> primary_nodes(PrimaryPermanentNodes(model));
+  if (std::find(primary_nodes.begin(), primary_nodes.end(), node) !=
+      primary_nodes.end()) {
+    return true;
+  }
+  return false;
+}
+
+const BookmarkNode* RootLevelFolderForNode(const BookmarkNode* node,
+                                           BookmarkModel* model) {
+  // This helper function doesn't work for managed bookmarks. This checks that
+  // |node| is editable by the user, which currently covers all the other
+  // bookmarks except the managed bookmarks.
+  DCHECK(model->client()->CanBeEditedByUser(node));
+
+  const std::vector<const BookmarkNode*> root_folders(RootLevelFolders(model));
+  const BookmarkNode* top = node;
+  while (top &&
+         std::find(root_folders.begin(), root_folders.end(), top) ==
+             root_folders.end()) {
+    top = top->parent();
+  }
+  return top;
+}
+
+}  // namespace enhanced_bookmark_utils