OLD | NEW |
(Empty) | |
| 1 // Copyright 2017 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 package org.chromium.chrome.browser.suggestions; |
| 6 |
| 7 import org.chromium.chrome.browser.ntp.cards.ActionItem; |
| 8 import org.chromium.chrome.browser.ntp.cards.SuggestionsSection; |
| 9 import org.chromium.chrome.browser.ntp.snippets.CategoryInt; |
| 10 import org.chromium.chrome.browser.ntp.snippets.SnippetArticle; |
| 11 |
| 12 import java.util.LinkedHashMap; |
| 13 import java.util.Map; |
| 14 |
| 15 /** |
| 16 * Attributes ranks to suggestions and related elements. |
| 17 * |
| 18 * Ranks here are 0-based scores attributed based on the position or loading ord
er of the |
| 19 * elements. |
| 20 */ |
| 21 public class SuggestionsRanker { |
| 22 private final Map<Integer, Integer> mSuggestionsAddedPerSection = new Linked
HashMap<>(); |
| 23 private int mTotalAddedSuggestions; |
| 24 |
| 25 /** |
| 26 * Attributes a per section rank to the provided action item. |
| 27 * @see ActionItem#getPerSectionRank() |
| 28 */ |
| 29 public void rankActionItem(ActionItem actionItem, SuggestionsSection section
) { |
| 30 if (actionItem.getPerSectionRank() != -1) return; // Item was already ra
nked. |
| 31 actionItem.setPerSectionRank(section.getSuggestionsCount()); |
| 32 } |
| 33 |
| 34 /** |
| 35 * Attributes global and per section rank to the provided suggestion. |
| 36 * @see SnippetArticle#getPerSectionRank() |
| 37 * @see SnippetArticle#getGlobalRank() |
| 38 */ |
| 39 public void rankSuggestion(SnippetArticle suggestion) { |
| 40 int globalRank = mTotalAddedSuggestions++; |
| 41 int perSectionRank = mSuggestionsAddedPerSection.get(suggestion.mCategor
y); |
| 42 mSuggestionsAddedPerSection.put(suggestion.mCategory, perSectionRank + 1
); |
| 43 |
| 44 suggestion.setRank(perSectionRank, globalRank); |
| 45 } |
| 46 |
| 47 public void registerCategory(@CategoryInt int category) { |
| 48 // Check we are not simply resetting an already registered category. |
| 49 if (mSuggestionsAddedPerSection.containsKey(category)) return; |
| 50 mSuggestionsAddedPerSection.put(category, 0); |
| 51 } |
| 52 |
| 53 public int getCategoryRank(@CategoryInt int category) { |
| 54 int rank = 0; |
| 55 for (Integer key : mSuggestionsAddedPerSection.keySet()) { |
| 56 if (key == category) return rank; |
| 57 ++rank; |
| 58 } |
| 59 return -1; |
| 60 } |
| 61 } |
OLD | NEW |