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/*
* Copyright (C) 2014 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.systemui.qs;
import android.content.Context;
import android.graphics.Typeface;
import android.graphics.drawable.Drawable;
import android.text.TextUtils;
import android.text.TextUtils.TruncateAt;
import android.view.Gravity;
import android.view.View;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
import com.android.systemui.R;
import java.util.Objects;
/**
* Text displayed over one or two lines, centered horizontally. A caret is always drawn at the end
* of the first line, and considered part of the content for centering purposes.
*
* Text overflow rules:
* First line: break on a word, unless a single word takes up the entire line - in which case
* truncate.
* Second line: ellipsis if necessary
*/
public class QSDualTileLabel extends LinearLayout {
private final Context mContext;
private final TextView mFirstLine;
private final ImageView mFirstLineCaret;
private final TextView mSecondLine;
private final int mHorizontalPaddingPx;
private String mText;
public QSDualTileLabel(Context context) {
super(context);
mContext = context;
setOrientation(LinearLayout.VERTICAL);
mHorizontalPaddingPx = mContext.getResources()
.getDimensionPixelSize(R.dimen.qs_dual_tile_padding_horizontal);
mFirstLine = initTextView();
mFirstLine.setPadding(mHorizontalPaddingPx, 0, mHorizontalPaddingPx, 0);
final LinearLayout firstLineLayout = new LinearLayout(mContext);
firstLineLayout.setPadding(0, 0, 0, 0);
firstLineLayout.setOrientation(LinearLayout.HORIZONTAL);
firstLineLayout.setClickable(false);
firstLineLayout.setBackground(null);
firstLineLayout.addView(mFirstLine);
mFirstLineCaret = new ImageView(mContext);
mFirstLineCaret.setScaleType(ImageView.ScaleType.MATRIX);
mFirstLineCaret.setClickable(false);
firstLineLayout.addView(mFirstLineCaret);
addView(firstLineLayout, newLinearLayoutParams());
mSecondLine = initTextView();
mSecondLine.setPadding(mHorizontalPaddingPx, 0, mHorizontalPaddingPx, 0);
mSecondLine.setEllipsize(TruncateAt.END);
mSecondLine.setVisibility(GONE);
addView(mSecondLine, newLinearLayoutParams());
addOnLayoutChangeListener(new OnLayoutChangeListener() {
@Override
public void onLayoutChange(View v, int left, int top, int right,
int bottom, int oldLeft, int oldTop, int oldRight, int oldBottom) {
if ((oldRight - oldLeft) != (right - left)) {
rescheduleUpdateText();
}
}
});
}
private static LayoutParams newLinearLayoutParams() {
final LayoutParams lp =
new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
lp.gravity = Gravity.CENTER_HORIZONTAL;
return lp;
}
public void setFirstLineCaret(Drawable d) {
mFirstLineCaret.setImageDrawable(d);
if (d != null) {
final int h = d.getIntrinsicHeight();
mFirstLine.setMinHeight(h);
mFirstLine.setPadding(mHorizontalPaddingPx, 0, 0, 0);
}
}
private TextView initTextView() {
final TextView tv = new TextView(mContext);
tv.setPadding(0, 0, 0, 0);
tv.setGravity(Gravity.CENTER_VERTICAL);
tv.setSingleLine(true);
tv.setClickable(false);
tv.setBackground(null);
return tv;
}
public void setText(CharSequence text) {
final String newText = text == null ? null : text.toString().trim();
if (Objects.equals(newText, mText)) return;
mText = newText;
rescheduleUpdateText();
}
public String getText() {
return mText;
}
public void setTextSize(int unit, float size) {
mFirstLine.setTextSize(unit, size);
mSecondLine.setTextSize(unit, size);
rescheduleUpdateText();
}
public void setTextColor(int color) {
mFirstLine.setTextColor(color);
mSecondLine.setTextColor(color);
rescheduleUpdateText();
}
public void setTypeface(Typeface tf) {
mFirstLine.setTypeface(tf);
mSecondLine.setTypeface(tf);
rescheduleUpdateText();
}
private void rescheduleUpdateText() {
removeCallbacks(mUpdateText);
post(mUpdateText);
}
private void updateText() {
if (getWidth() == 0) return;
if (TextUtils.isEmpty(mText)) {
mFirstLine.setText(null);
mSecondLine.setText(null);
mSecondLine.setVisibility(GONE);
return;
}
final float maxWidth = getWidth() - mFirstLineCaret.getWidth() - mHorizontalPaddingPx
- getPaddingLeft() - getPaddingRight();
float width = mFirstLine.getPaint().measureText(mText);
if (width <= maxWidth) {
mFirstLine.setText(mText);
mSecondLine.setText(null);
mSecondLine.setVisibility(GONE);
return;
}
final int n = mText.length();
int lastWordBoundary = -1;
boolean inWhitespace = false;
int i = 0;
for (i = 1; i < n; i++) {
width = mFirstLine.getPaint().measureText(mText.substring(0, i));
final boolean done = width > maxWidth;
if (Character.isWhitespace(mText.charAt(i))) {
if (!inWhitespace && !done) {
lastWordBoundary = i;
}
inWhitespace = true;
} else {
inWhitespace = false;
}
if (done) {
break;
}
}
if (lastWordBoundary == -1) {
lastWordBoundary = i - 1;
}
mFirstLine.setText(mText.substring(0, lastWordBoundary));
mSecondLine.setText(mText.substring(lastWordBoundary).trim());
mSecondLine.setVisibility(VISIBLE);
}
private final Runnable mUpdateText = new Runnable() {
@Override
public void run() {
updateText();
}
};
}
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