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/*
* Copyright (C) 2016 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.settingslib;
import static com.android.settingslib.RestrictedLockUtils.EnforcedAdmin;
import android.content.Context;
import android.content.res.TypedArray;
import android.os.UserHandle;
import android.text.TextUtils;
import android.util.AttributeSet;
import android.util.TypedValue;
import android.widget.TextView;
import androidx.preference.Preference;
import androidx.preference.PreferenceViewHolder;
/**
* Helper class for managing settings preferences that can be disabled
* by device admins via user restrictions.
*/
public class RestrictedPreferenceHelper {
private final Context mContext;
private final Preference mPreference;
private boolean mDisabledByAdmin;
private EnforcedAdmin mEnforcedAdmin;
private String mAttrUserRestriction = null;
private boolean mUseAdminDisabledSummary = false;
public RestrictedPreferenceHelper(Context context, Preference preference,
AttributeSet attrs) {
mContext = context;
mPreference = preference;
if (attrs != null) {
final TypedArray attributes = context.obtainStyledAttributes(attrs,
R.styleable.RestrictedPreference);
final TypedValue userRestriction =
attributes.peekValue(R.styleable.RestrictedPreference_userRestriction);
CharSequence data = null;
if (userRestriction != null && userRestriction.type == TypedValue.TYPE_STRING) {
if (userRestriction.resourceId != 0) {
data = context.getText(userRestriction.resourceId);
} else {
data = userRestriction.string;
}
}
mAttrUserRestriction = data == null ? null : data.toString();
// If the system has set the user restriction, then we shouldn't add the padlock.
if (RestrictedLockUtilsInternal.hasBaseUserRestriction(mContext, mAttrUserRestriction,
UserHandle.myUserId())) {
mAttrUserRestriction = null;
return;
}
final TypedValue useAdminDisabledSummary =
attributes.peekValue(R.styleable.RestrictedPreference_useAdminDisabledSummary);
if (useAdminDisabledSummary != null) {
mUseAdminDisabledSummary =
(useAdminDisabledSummary.type == TypedValue.TYPE_INT_BOOLEAN
&& useAdminDisabledSummary.data != 0);
}
}
}
/**
* Modify PreferenceViewHolder to add padlock if restriction is disabled.
*/
public void onBindViewHolder(PreferenceViewHolder holder) {
if (mDisabledByAdmin) {
holder.itemView.setEnabled(true);
}
if (mUseAdminDisabledSummary) {
final TextView summaryView = (TextView) holder.findViewById(android.R.id.summary);
if (summaryView != null) {
final CharSequence disabledText = summaryView.getContext().getText(
R.string.disabled_by_admin_summary_text);
if (mDisabledByAdmin) {
summaryView.setText(disabledText);
} else if (TextUtils.equals(disabledText, summaryView.getText())) {
// It's previously set to disabled text, clear it.
summaryView.setText(null);
}
}
}
}
public void useAdminDisabledSummary(boolean useSummary) {
mUseAdminDisabledSummary = useSummary;
}
/**
* Check if the preference is disabled if so handle the click by informing the user.
*
* @return true if the method handled the click.
*/
public boolean performClick() {
if (mDisabledByAdmin) {
RestrictedLockUtils.sendShowAdminSupportDetailsIntent(mContext, mEnforcedAdmin);
return true;
}
return false;
}
/**
* Disable / enable if we have been passed the restriction in the xml.
*/
public void onAttachedToHierarchy() {
if (mAttrUserRestriction != null) {
checkRestrictionAndSetDisabled(mAttrUserRestriction, UserHandle.myUserId());
}
}
/**
* Set the user restriction that is used to disable this preference.
*
* @param userRestriction constant from {@link android.os.UserManager}
* @param userId user to check the restriction for.
*/
public void checkRestrictionAndSetDisabled(String userRestriction, int userId) {
EnforcedAdmin admin = RestrictedLockUtilsInternal.checkIfRestrictionEnforced(mContext,
userRestriction, userId);
setDisabledByAdmin(admin);
}
/**
* @return EnforcedAdmin if we have been passed the restriction in the xml.
*/
public EnforcedAdmin checkRestrictionEnforced() {
if (mAttrUserRestriction == null) {
return null;
}
return RestrictedLockUtilsInternal.checkIfRestrictionEnforced(mContext,
mAttrUserRestriction, UserHandle.myUserId());
}
/**
* Disable this preference based on the enforce admin.
*
* @param admin details of the admin who enforced the restriction. If it is
* {@code null}, then this preference will be enabled. Otherwise, it will be disabled.
* Only gray out the preference which is not {@link RestrictedTopLevelPreference}.
* @return true if the disabled state was changed.
*/
public boolean setDisabledByAdmin(EnforcedAdmin admin) {
final boolean disabled = (admin != null ? true : false);
mEnforcedAdmin = admin;
boolean changed = false;
if (mDisabledByAdmin != disabled) {
mDisabledByAdmin = disabled;
changed = true;
}
if (!(mPreference instanceof RestrictedTopLevelPreference)) {
mPreference.setEnabled(!disabled);
}
return changed;
}
public boolean isDisabledByAdmin() {
return mDisabledByAdmin;
}
}
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