/*
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* Copyright (C) 2017 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. 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 distributed under the
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* License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the specific language governing
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* permissions and limitations under the License.
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*/
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package com.android.systemui.tuner;
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import android.util.DisplayMetrics;
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import android.view.View;
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import android.view.WindowManager;
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import com.android.systemui.Dependency;
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import com.android.systemui.tuner.TunerService.Tunable;
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import javax.inject.Inject;
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import javax.inject.Singleton;
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/**
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* Version of Space that can be resized by a tunable setting.
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*/
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public class TunablePadding implements Tunable {
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public static final int FLAG_START = 1;
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public static final int FLAG_END = 2;
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public static final int FLAG_TOP = 4;
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public static final int FLAG_BOTTOM = 8;
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private final int mFlags;
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private final View mView;
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private final int mDefaultSize;
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private final float mDensity;
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private final TunerService mTunerService;
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private TunablePadding(String key, int def, int flags, View view, TunerService tunerService) {
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mDefaultSize = def;
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mFlags = flags;
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mView = view;
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DisplayMetrics metrics = new DisplayMetrics();
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view.getContext().getSystemService(WindowManager.class)
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.getDefaultDisplay().getMetrics(metrics);
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mDensity = metrics.density;
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mTunerService = tunerService;
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mTunerService.addTunable(this, key);
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}
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@Override
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public void onTuningChanged(String key, String newValue) {
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int dimen = mDefaultSize;
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if (newValue != null) {
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try {
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dimen = (int) (Integer.parseInt(newValue) * mDensity);
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} catch (NumberFormatException ex) {}
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}
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int left = mView.isLayoutRtl() ? FLAG_END : FLAG_START;
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int right = mView.isLayoutRtl() ? FLAG_START : FLAG_END;
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mView.setPadding(getPadding(dimen, left), getPadding(dimen, FLAG_TOP),
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getPadding(dimen, right), getPadding(dimen, FLAG_BOTTOM));
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}
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private int getPadding(int dimen, int flag) {
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return ((mFlags & flag) != 0) ? dimen : 0;
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}
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public void destroy() {
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mTunerService.removeTunable(this);
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}
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/**
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* Exists for easy injecting in tests.
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*/
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@Singleton
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public static class TunablePaddingService {
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private final TunerService mTunerService;
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/**
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*/
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@Inject
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public TunablePaddingService(TunerService tunerService) {
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mTunerService = tunerService;
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}
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public TunablePadding add(View view, String key, int defaultSize, int flags) {
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if (view == null) {
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throw new IllegalArgumentException();
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}
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return new TunablePadding(key, defaultSize, flags, view, mTunerService);
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}
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}
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public static TunablePadding addTunablePadding(View view, String key, int defaultSize,
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int flags) {
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return Dependency.get(TunablePaddingService.class).add(view, key, defaultSize, flags);
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}
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}
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