/*
 * Copyright (C) 2018 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.phone.settings;

import android.content.Context;
import android.preference.Preference;
import android.text.Html;
import android.text.method.LinkMovementMethod;
import android.util.AttributeSet;
import android.view.View;
import android.widget.TextView;

import com.android.phone.R;

/**
 * Provides a {@link TextView} inside a preference. Useful for displaying static text which may
 * contain hyperlinks.
 */
public class TextViewPreference extends Preference {

    /**
     * The resource ID of the text to be populated in the {@link TextView} when a resource ID is
     * used.
     */
    private int mTextResourceId = 0;

    /** The text to be populated in the {@link TextView} when a {@link CharSequence} is used. */
    private CharSequence mText;

    /** The {@link TextView} containing the text. */
    private TextView mTextView;

    /**
     * Instantiates the {@link TextViewPreference} instance.
     *
     * @param context The Context this is associated with, through which it can access the current
     *     theme, resources, etc.
     * @param attrs The attributes of the XML tag that is inflating the preference.
     * @param defStyleAttr An attribute in the current theme that contains a reference to a style
     *     resource that supplies default values for the view. Can be 0 to not look for defaults.
     * @param defStyleRes A resource identifier of a style resource that supplies default values for
     *     the view, used only if defStyleAttr is 0 or can not be found in the theme. Can be 0 to
     *     not look for defaults.
     */
    public TextViewPreference(
            Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
        super(context, attrs, defStyleAttr, defStyleRes);

        setLayoutResource(R.layout.text_view_preference);
    }

    /**
     * Instantiates the {@link TextViewPreference} instance.
     *
     * @param context The Context this is associated with, through which it can access the current
     *     theme, resources, etc.
     * @param attrs The attributes of the XML tag that is inflating the preference.
     * @param defStyleAttr An attribute in the current theme that contains a reference to a style
     *     resource that supplies default values for the view. Can be 0 to not look for defaults.
     */
    public TextViewPreference(Context context, AttributeSet attrs, int defStyleAttr) {
        this(context, attrs, defStyleAttr, 0);
    }

    /**
     * Instantiates the {@link TextViewPreference} instance.
     *
     * @param context The Context this is associated with, through which it can access the current
     *     theme, resources, etc.
     * @param attrs The attributes of the XML tag that is inflating the preference.
     */
    public TextViewPreference(Context context, AttributeSet attrs) {
        this(context, attrs, android.R.attr.preferenceStyle, 0);
    }

    /**
     * Instantiates the {@link TextViewPreference} instance.
     *
     * @param context The Context this is associated with, through which it can access the current
     *     theme, resources, etc.
     */
    public TextViewPreference(Context context) {
        super(context, null);

        setLayoutResource(R.layout.text_view_preference);
    }

    /**
     * Handles binding the preference.
     *
     * @param view The view.
     */
    @Override
    protected void onBindView(View view) {
        super.onBindView(view);
        mTextView = (TextView) view.findViewById(R.id.text);
        if (mTextResourceId != 0) {
            setTitle(mTextResourceId);
        } else if (mText != null) {
            setTitle(mText);
        } else if (getTitleRes() != 0) {
            setTitle(getTitleRes());
        }
    }

    /**
     * Sets the preference title from a {@link CharSequence}.
     *
     * @param text The text.
     */
    @Override
    public void setTitle(CharSequence text) {
        mTextResourceId = 0;
        mText = text;
        if (mTextView == null) {
            return;
        }

        mTextView.setMovementMethod(LinkMovementMethod.getInstance());
        mTextView.setText(text);
    }

    /**
     * Sets the preference title from a resource id.
     *
     * @param textResId The string resource Id.
     */
    @Override
    public void setTitle(int textResId) {
        mTextResourceId = textResId;
        setTitle(Html.fromHtml(getContext().getString(textResId), Html.FROM_HTML_MODE_COMPACT));
    }
}