/*
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* Copyright (C) 2016 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License
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*/
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package com.android.systemui.statusbar.notification;
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import android.text.Layout;
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import android.text.Spanned;
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import android.text.TextUtils;
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import android.util.Pools;
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import android.view.View;
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import android.widget.TextView;
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/**
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* A transform state of a mText view.
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*/
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public class TextViewTransformState extends TransformState {
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private static Pools.SimplePool<TextViewTransformState> sInstancePool
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= new Pools.SimplePool<>(40);
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private TextView mText;
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@Override
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public void initFrom(View view, TransformInfo transformInfo) {
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super.initFrom(view, transformInfo);
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mText = (TextView) view;
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}
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@Override
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protected boolean sameAs(TransformState otherState) {
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if (super.sameAs(otherState)) {
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return true;
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}
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if (otherState instanceof TextViewTransformState) {
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TextViewTransformState otherTvs = (TextViewTransformState) otherState;
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if(TextUtils.equals(otherTvs.mText.getText(), mText.getText())) {
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int ownEllipsized = getEllipsisCount();
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int otherEllipsized = otherTvs.getEllipsisCount();
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return ownEllipsized == otherEllipsized
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&& mText.getLineCount() == otherTvs.mText.getLineCount()
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&& hasSameSpans(otherTvs);
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}
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}
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return false;
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}
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private boolean hasSameSpans(TextViewTransformState otherTvs) {
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boolean hasSpans = mText instanceof Spanned;
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boolean otherHasSpans = otherTvs.mText instanceof Spanned;
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if (hasSpans != otherHasSpans) {
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return false;
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} else if (!hasSpans) {
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return true;
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}
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// Actually both have spans, let's try to compare them
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Spanned ownSpanned = (Spanned) mText;
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Object[] spans = ownSpanned.getSpans(0, ownSpanned.length(), Object.class);
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Spanned otherSpanned = (Spanned) otherTvs.mText;
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Object[] otherSpans = otherSpanned.getSpans(0, otherSpanned.length(), Object.class);
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if (spans.length != otherSpans.length) {
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return false;
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}
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for (int i = 0; i < spans.length; i++) {
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Object span = spans[i];
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Object otherSpan = otherSpans[i];
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if (!span.getClass().equals(otherSpan.getClass())) {
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return false;
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}
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if (ownSpanned.getSpanStart(span) != otherSpanned.getSpanStart(otherSpan)
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|| ownSpanned.getSpanEnd(span) != otherSpanned.getSpanEnd(otherSpan)) {
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return false;
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}
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}
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return true;
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}
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@Override
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protected boolean transformScale(TransformState otherState) {
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if (!(otherState instanceof TextViewTransformState)) {
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return false;
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}
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TextViewTransformState otherTvs = (TextViewTransformState) otherState;
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if (!TextUtils.equals(mText.getText(), otherTvs.mText.getText())) {
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return false;
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}
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int lineCount = mText.getLineCount();
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return lineCount == 1 && lineCount == otherTvs.mText.getLineCount()
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&& getEllipsisCount() == otherTvs.getEllipsisCount()
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&& getViewHeight() != otherTvs.getViewHeight();
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}
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@Override
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protected int getViewWidth() {
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Layout l = mText.getLayout();
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if (l != null) {
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return (int) l.getLineWidth(0);
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}
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return super.getViewWidth();
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}
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@Override
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protected int getViewHeight() {
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return mText.getLineHeight();
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}
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private int getInnerHeight(TextView text) {
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return text.getHeight() - text.getPaddingTop() - text.getPaddingBottom();
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}
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private int getEllipsisCount() {
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Layout l = mText.getLayout();
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if (l != null) {
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int lines = l.getLineCount();
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if (lines > 0) {
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// we only care about the first line
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return l.getEllipsisCount(0);
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}
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}
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return 0;
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}
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public static TextViewTransformState obtain() {
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TextViewTransformState instance = sInstancePool.acquire();
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if (instance != null) {
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return instance;
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}
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return new TextViewTransformState();
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}
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@Override
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public void recycle() {
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super.recycle();
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sInstancePool.release(this);
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}
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@Override
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protected void reset() {
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super.reset();
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mText = null;
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}
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}
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