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package com.android.server.status;
import com.android.internal.R;
import android.content.Context;
import android.graphics.drawable.Drawable;
import android.os.Handler;
import android.text.StaticLayout;
import android.text.Layout.Alignment;
import android.text.TextPaint;
import android.text.TextUtils;
import android.util.Slog;
import android.view.View;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.widget.TextSwitcher;
import android.widget.TextView;
import android.widget.ImageSwitcher;
import java.util.ArrayList;
abstract class Ticker {
private static final int TICKER_SEGMENT_DELAY = 3000;
private final class Segment {
NotificationData notificationData;
Drawable icon;
CharSequence text;
int current;
int next;
boolean first;
StaticLayout getLayout(CharSequence substr) {
int w = mTextSwitcher.getWidth() - mTextSwitcher.getPaddingLeft()
- mTextSwitcher.getPaddingRight();
return new StaticLayout(substr, mPaint, w, Alignment.ALIGN_NORMAL, 1, 0, true);
}
CharSequence rtrim(CharSequence substr, int start, int end) {
while (end > start && !TextUtils.isGraphic(substr.charAt(end-1))) {
end--;
}
if (end > start) {
return substr.subSequence(start, end);
}
return null;
}
/** returns null if there is no more text */
CharSequence getText() {
if (this.current > this.text.length()) {
return null;
}
CharSequence substr = this.text.subSequence(this.current, this.text.length());
StaticLayout l = getLayout(substr);
int lineCount = l.getLineCount();
if (lineCount > 0) {
int start = l.getLineStart(0);
int end = l.getLineEnd(0);
this.next = this.current + end;
return rtrim(substr, start, end);
} else {
throw new RuntimeException("lineCount=" + lineCount + " current=" + current +
" text=" + text);
}
}
/** returns null if there is no more text */
CharSequence advance() {
this.first = false;
int index = this.next;
final int len = this.text.length();
while (index < len && !TextUtils.isGraphic(this.text.charAt(index))) {
index++;
}
if (index >= len) {
return null;
}
CharSequence substr = this.text.subSequence(index, this.text.length());
StaticLayout l = getLayout(substr);
final int lineCount = l.getLineCount();
int i;
for (i=0; i<lineCount; i++) {
int start = l.getLineStart(i);
int end = l.getLineEnd(i);
if (i == lineCount-1) {
this.next = len;
} else {
this.next = index + l.getLineStart(i+1);
}
CharSequence result = rtrim(substr, start, end);
if (result != null) {
this.current = index + start;
return result;
}
}
this.current = len;
return null;
}
Segment(NotificationData n, Drawable icon, CharSequence text) {
this.notificationData = n;
this.icon = icon;
this.text = text;
int index = 0;
final int len = text.length();
while (index < len && !TextUtils.isGraphic(text.charAt(index))) {
index++;
}
this.current = index;
this.next = index;
this.first = true;
}
};
private Handler mHandler = new Handler();
private ArrayList<Segment> mSegments = new ArrayList();
private TextPaint mPaint;
private View mTickerView;
private ImageSwitcher mIconSwitcher;
private TextSwitcher mTextSwitcher;
Ticker(Context context, StatusBarView sb) {
mTickerView = sb.findViewById(R.id.ticker);
mIconSwitcher = (ImageSwitcher)sb.findViewById(R.id.tickerIcon);
mIconSwitcher.setInAnimation(
AnimationUtils.loadAnimation(context, com.android.internal.R.anim.push_up_in));
mIconSwitcher.setOutAnimation(
AnimationUtils.loadAnimation(context, com.android.internal.R.anim.push_up_out));
mTextSwitcher = (TextSwitcher)sb.findViewById(R.id.tickerText);
mTextSwitcher.setInAnimation(
AnimationUtils.loadAnimation(context, com.android.internal.R.anim.push_up_in));
mTextSwitcher.setOutAnimation(
AnimationUtils.loadAnimation(context, com.android.internal.R.anim.push_up_out));
// Copy the paint style of one of the TextSwitchers children to use later for measuring
TextView text = (TextView)mTextSwitcher.getChildAt(0);
mPaint = text.getPaint();
}
void addEntry(NotificationData n, Drawable icon, CharSequence text) {
int initialCount = mSegments.size();
Segment newSegment = new Segment(n, icon, text);
// prune out any preexisting ones for this notification, but not the current one.
// let that finish, even if it's the same id
for (int i=1; i<initialCount; i++) {
Segment seg = mSegments.get(i);
if (n.id == seg.notificationData.id && n.pkg.equals(seg.notificationData.pkg)) {
// just update that one to use this new data instead
mSegments.set(i, newSegment);
// and since we know initialCount != 0, just return
return ;
}
}
mSegments.add(newSegment);
if (initialCount == 0 && mSegments.size() > 0) {
Segment seg = mSegments.get(0);
seg.first = false;
mIconSwitcher.setAnimateFirstView(false);
mIconSwitcher.reset();
mIconSwitcher.setImageDrawable(seg.icon);
mTextSwitcher.setAnimateFirstView(false);
mTextSwitcher.reset();
mTextSwitcher.setText(seg.getText());
tickerStarting();
scheduleAdvance();
}
}
void halt() {
mHandler.removeCallbacks(mAdvanceTicker);
mSegments.clear();
tickerHalting();
}
void reflowText() {
if (mSegments.size() > 0) {
Segment seg = mSegments.get(0);
CharSequence text = seg.getText();
mTextSwitcher.setCurrentText(text);
}
}
private Runnable mAdvanceTicker = new Runnable() {
public void run() {
while (mSegments.size() > 0) {
Segment seg = mSegments.get(0);
if (seg.first) {
// this makes the icon slide in for the first one for a given
// notification even if there are two notifications with the
// same icon in a row
mIconSwitcher.setImageDrawable(seg.icon);
}
CharSequence text = seg.advance();
if (text == null) {
mSegments.remove(0);
continue;
}
mTextSwitcher.setText(text);
scheduleAdvance();
break;
}
if (mSegments.size() == 0) {
tickerDone();
}
}
};
private void scheduleAdvance() {
mHandler.postDelayed(mAdvanceTicker, TICKER_SEGMENT_DELAY);
}
abstract void tickerStarting();
abstract void tickerDone();
abstract void tickerHalting();
}
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