package com.netease.nim.uikit.contact.core.viewholder;
import android.text.SpannableString;
import android.text.SpannableStringBuilder;
import android.text.Spanned;
import android.text.style.ForegroundColorSpan;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.TextView;
import com.netease.nim.uikit.R;
import com.netease.nim.uikit.cache.TeamDataCache;
import com.netease.nim.uikit.common.ui.imageview.HeadImageView;
import com.netease.nim.uikit.common.util.sys.ScreenUtil;
import com.netease.nim.uikit.common.util.sys.TimeUtil;
import com.netease.nim.uikit.contact.core.item.MsgItem;
import com.netease.nim.uikit.contact.core.model.ContactDataAdapter;
import com.netease.nim.uikit.contact.core.model.IContact;
import com.netease.nimlib.sdk.msg.constant.SessionTypeEnum;
import com.netease.nimlib.sdk.search.model.MsgIndexRecord;
import com.netease.nimlib.sdk.search.model.RecordHitInfo;
import com.netease.nimlib.sdk.team.model.Team;
import java.util.List;
public class MsgHolder extends AbsContactViewHolder<MsgItem> {
private static final String PREFIX = "...";
protected HeadImageView head;
protected TextView name;
protected TextView time;
protected TextView desc;
protected int descTextViewWidth; // 当前ViewHolder desc TextView 最大的宽度px
@Override
public View inflate(LayoutInflater inflater) {
View view = inflater.inflate(R.layout.nim_contacts_item, null);
head = (HeadImageView) view.findViewById(R.id.contacts_item_head);
name = (TextView) view.findViewById(R.id.contacts_item_name);
time = (TextView) view.findViewById(R.id.contacts_item_time);
desc = (TextView) view.findViewById(R.id.contacts_item_desc);
// calculate
View parent = (View) desc.getParent();
if (parent.getMeasuredWidth() == 0) {
// xml中：50dp，包括头像的长度还有左右间距大小
parent.measure(View.MeasureSpec.makeMeasureSpec(ScreenUtil.getDisplayWidth() - ScreenUtil.dip2px(50.0f), View.MeasureSpec.EXACTLY), 0);
}
descTextViewWidth = (int) (parent.getMeasuredWidth() - desc.getPaint().measureText(PREFIX));
return view;
}
@Override
public void refresh(ContactDataAdapter adapter, int position, final MsgItem item) {
// contact info
final IContact contact = item.getContact();
final MsgIndexRecord record = item.getRecord();
if (record.getSessionType() == SessionTypeEnum.P2P) {
head.loadBuddyAvatar(contact.getContactId());
} else {
Team team = TeamDataCache.getInstance().getTeamById(contact.getContactId());
head.loadTeamIconByTeam(team);
}
name.setText(contact.getDisplayName());
if (item.isQuerySession()) {
time.setVisibility(View.VISIBLE);
time.setText(TimeUtil.getTimeShowString(record.getTime(), false));
} else {
time.setVisibility(View.GONE);
}
// query result
if (record.getCount() > 1) {
desc.setText(String.format("%d条相关聊天记录", record.getCount()));
} else {
String text = record.getText(); // 原串
List<RecordHitInfo> clone = record.cloneHitInfo(); // 计算高亮区域并clone
// 异常情况，没有高亮击中的区间，直接设置原串
if (clone == null || clone.isEmpty()) {
desc.setText(text);
return;
}
int firstIndex = clone.get(0).start; // 首个需要高亮的关键字的起始位置
int firstHitInfoLength = clone.get(0).end - clone.get(0).start + 1; // 首个需要高亮的关键字的长度
// 判断是否需要截取
Object[] result = needCutText(record.getText(), firstIndex, firstHitInfoLength);
Boolean needCut = (Boolean) result[0];
int extractPreStrNum = (Integer) result[1];
if (needCut) {
// 文本截取
int newStartIndex = firstIndex - extractPreStrNum;
text = PREFIX + text.substring(newStartIndex);
// 矫正hitInfo
int delta = newStartIndex - PREFIX.length();
for (RecordHitInfo rh : clone) {
rh.start -= delta;
rh.end -= delta;
}
}
display(desc, text, clone);
}
}
/**
* 假如第一个索引之前的文字宽度>layout宽度，就需要把text截断
*
* @param text 原文本
* @param firstIndex 首个需要高亮的关键字的起始位置
* @param firstHitInfoLength 首个需要高亮的关键字的长度
* @return [0]是否需要截取字符串;[1]如果要截取，那么需要提取前面几个字符
*/
private Object[] needCutText(String text, int firstIndex, int firstHitInfoLength) {
Boolean r0;
Integer r1;
float descLength = desc.getPaint().measureText(text.substring(0, firstIndex + firstHitInfoLength));
float avg = descLength / (firstIndex + firstHitInfoLength); // 前firstIndex+firstHitInfoLength个字符，平均每个字符的长度
if (descLength >= descTextViewWidth) {
r0 = true;
int extractPreStrNum = (int) (1.0f * descTextViewWidth / avg); // 当前viewHolder desc TextView能容纳多少个字符（前firstIndex区间的字符）
extractPreStrNum = extractPreStrNum - PREFIX.length() - firstHitInfoLength; // 可以提取前面几个字符
if (extractPreStrNum < 0) {
extractPreStrNum = 0; // 有可能为负数，例如firstHitInfo特别长
}
// 新的文本
int newStartIndex = firstIndex - extractPreStrNum;
text = PREFIX + text.substring(newStartIndex, firstIndex + firstHitInfoLength);
// extractPreStrNum 校准
if (extractPreStrNum > 0) {
descLength = desc.getPaint().measureText(text);
if (descLength > descTextViewWidth) {
int delta = (int) ((descLength - descTextViewWidth) / (descLength / text.length())) + 1;
extractPreStrNum -= delta; // 減少提取的字符数
}
if (extractPreStrNum < 0) {
extractPreStrNum = 0; // 修正
}
}
r1 = extractPreStrNum;
} else {
r0 = false;
r1 = 0;
}
return new Object[]{r0, r1};
}
public static final void display(TextView tv, String text, List<RecordHitInfo> hitInfos) {
if (hitInfos == null || hitInfos.isEmpty()) {
tv.setText(text);
return;
}
SpannableStringBuilder sb = new SpannableStringBuilder();
SpannableString ss = new SpannableString(text);
for (RecordHitInfo r : hitInfos) {
ss.setSpan(new ForegroundColorSpan(tv.getResources().getColor(R.color.contact_search_hit)), r.start, r.end + 1, Spanned.SPAN_INCLUSIVE_EXCLUSIVE);
}
sb.append(ss);
tv.setText(sb);
}
}