Markup.java
上传用户:szyujian
上传日期:2016-09-20
资源大小:320k
文件大小:4k
- /*
- * Copyright (C) 2008 Esmertec AG.
- * Copyright (C) 2008 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
- package com.android.im.app;
- import com.android.im.plugin.BrandingResourceIDs;
- import android.graphics.drawable.Drawable;
- import android.text.Spannable;
- import android.text.SpannableString;
- import android.text.style.ImageSpan;
- import android.text.util.Linkify;
- public class Markup {
- private BrandingResources mRes;
- private IntTrie mSmileys;
- public Markup(BrandingResources res) {
- mRes = res;
- mSmileys = new IntTrie(
- res.getStringArray(BrandingResourceIDs.STRING_ARRAY_SMILEY_TEXTS), res.getSmileyIcons());
- }
- public final CharSequence markup(CharSequence text) {
- SpannableString result;
- if (text instanceof SpannableString) {
- result = (SpannableString) text;
- } else {
- result = new SpannableString(text);
- }
- Linkify.addLinks(result, Linkify.ALL);
- applyEmoticons(result);
- return result;
- }
- public final CharSequence applyEmoticons(CharSequence text) {
- int offset = 0;
- final int len = text.length();
- SpannableString result = null;
- while (offset < len) {
- int index = offset;
- IntTrie.Node n = mSmileys.getNode(text.charAt(index++));
- int candidate = 0;
- int lastMatchEnd = -1;
- // Search the trie until we stop matching
- while (n != null) {
- // Record the value and position of the longest match
- if (n.mValue != 0) {
- candidate = n.mValue;
- lastMatchEnd = index;
- }
- // Let's not run off the end of the input
- if (index >= len) {
- break;
- }
- n = n.getNode(text.charAt(index++));
- }
- // If we matched a smiley, apply its image over the text
- if (candidate != 0) {
- // Lazy-convert the result text to a SpannableString if we have to
- if (result == null) {
- if (text instanceof SpannableString) {
- result = (SpannableString) text;
- } else {
- result = new SpannableString(text);
- text = result;
- }
- }
- Drawable smiley = mRes.getSmileyIcon(candidate);
- smiley.setBounds(0, 0, smiley.getIntrinsicWidth(), smiley.getIntrinsicHeight());
- result.setSpan(new ImageSpan(smiley),
- offset, lastMatchEnd, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
- candidate = 0;
- }
- // if there was a match, start searching for the next one after it
- // if no match, start at the next character
- if (lastMatchEnd != -1) {
- offset = lastMatchEnd;
- lastMatchEnd = -1;
- } else {
- offset++;
- }
- }
- // If there were no modifications, return the original string
- if (result == null) {
- return text;
- }
- return result;
- }
- }