1 /* 2 * Copyright (C) 2010 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.quicksearchbox; 18 19 import android.text.Spannable; 20 21 /** 22 * Suggestion formatter interface. This is used to bold (or otherwise highlight) portions of a 23 * suggestion which were not a part of the query. 24 */ 25 public abstract class SuggestionFormatter { 26 27 private final TextAppearanceFactory mSpanFactory; 28 29 protected SuggestionFormatter(TextAppearanceFactory spanFactory) { 30 mSpanFactory = spanFactory; 31 } 32 33 /** 34 * Formats a suggestion for display in the UI. 35 * 36 * @param query the query as entered by the user 37 * @param suggestion the suggestion 38 * @return Formatted suggestion text. 39 */ 40 public abstract CharSequence formatSuggestion(String query, String suggestion); 41 42 protected void applyQueryTextStyle(Spannable text, int start, int end) { 43 if (start == end) return; 44 setSpans(text, start, end, mSpanFactory.createSuggestionQueryTextAppearance()); 45 } 46 47 protected void applySuggestedTextStyle(Spannable text, int start, int end) { 48 if (start == end) return; 49 setSpans(text, start, end, mSpanFactory.createSuggestionSuggestedTextAppearance()); 50 } 51 52 private void setSpans(Spannable text, int start, int end, Object[] spans) { 53 for (Object span : spans) { 54 text.setSpan(span, start, end, 0); 55 } 56 } 57 58 } 59
