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/*
* Copyright (C) 2012 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.internal.view;
import android.compat.annotation.UnsupportedAppUsage;
import android.content.Context;
import android.content.res.Configuration;
import android.content.res.Resources;
import android.content.res.TypedArray;
import android.os.Build;
import com.android.internal.R;
/**
* Allows components to query for various configuration policy decisions
* about how the action bar should lay out and behave on the current device.
*/
public class ActionBarPolicy {
@UnsupportedAppUsage
private Context mContext;
@UnsupportedAppUsage
public static ActionBarPolicy get(Context context) {
return new ActionBarPolicy(context);
}
@UnsupportedAppUsage
private ActionBarPolicy(Context context) {
mContext = context;
}
/**
* Returns the maximum number of action buttons that should be permitted within an action
* bar/action mode. This will be used to determine how many showAsAction="ifRoom" items can fit.
* "always" items can override this.
*/
@UnsupportedAppUsage
public int getMaxActionButtons() {
final Configuration config = mContext.getResources().getConfiguration();
final int width = config.screenWidthDp;
final int height = config.screenHeightDp;
final int smallest = config.smallestScreenWidthDp;
if (smallest > 600 || (width > 960 && height > 720) || (width > 720 && height > 960)) {
// For values-w600dp, values-sw600dp and values-xlarge.
return 5;
} else if (width >= 500 || (width > 640 && height > 480) || (width > 480 && height > 640)) {
// For values-w500dp and values-large.
return 4;
} else if (width >= 360) {
// For values-w360dp.
return 3;
} else {
return 2;
}
}
@UnsupportedAppUsage
public boolean showsOverflowMenuButton() {
return true;
}
@UnsupportedAppUsage
public int getEmbeddedMenuWidthLimit() {
return mContext.getResources().getDisplayMetrics().widthPixels / 2;
}
@UnsupportedAppUsage
public boolean hasEmbeddedTabs() {
final int targetSdk = mContext.getApplicationInfo().targetSdkVersion;
if (targetSdk >= Build.VERSION_CODES.JELLY_BEAN) {
return mContext.getResources().getBoolean(R.bool.action_bar_embed_tabs);
}
// The embedded tabs policy changed in Jellybean; give older apps the old policy
// so they get what they expect.
final Configuration configuration = mContext.getResources().getConfiguration();
final int width = configuration.screenWidthDp;
final int height = configuration.screenHeightDp;
return configuration.orientation == Configuration.ORIENTATION_LANDSCAPE ||
width >= 480 || (width >= 640 && height >= 480);
}
@UnsupportedAppUsage
public int getTabContainerHeight() {
TypedArray a = mContext.obtainStyledAttributes(null, R.styleable.ActionBar,
com.android.internal.R.attr.actionBarStyle, 0);
int height = a.getLayoutDimension(R.styleable.ActionBar_height, 0);
Resources r = mContext.getResources();
if (!hasEmbeddedTabs()) {
// Stacked tabs; limit the height
height = Math.min(height,
r.getDimensionPixelSize(R.dimen.action_bar_stacked_max_height));
}
a.recycle();
return height;
}
public boolean enableHomeButtonByDefault() {
// Older apps get the home button interaction enabled by default.
// Newer apps need to enable it explicitly.
return mContext.getApplicationInfo().targetSdkVersion <
Build.VERSION_CODES.ICE_CREAM_SANDWICH;
}
@UnsupportedAppUsage
public int getStackedTabMaxWidth() {
return mContext.getResources().getDimensionPixelSize(
R.dimen.action_bar_stacked_tab_max_width);
}
}
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