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      1 /*
      2  * Copyright (C) 2017 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.android.settings.wifi;
     18 
     19 import android.content.Context;
     20 import android.support.annotation.Nullable;
     21 import android.support.v7.preference.Preference;
     22 import android.support.v7.preference.PreferenceViewHolder;
     23 import android.text.Spannable;
     24 import android.text.method.LinkMovementMethod;
     25 import android.text.style.TextAppearanceSpan;
     26 import android.util.AttributeSet;
     27 import android.widget.TextView;
     28 import com.android.settings.LinkifyUtils;
     29 
     30 /**
     31  * A preference with a title that can have linkable content on click.
     32  */
     33 public class LinkablePreference extends Preference {
     34 
     35     private LinkifyUtils.OnClickListener mClickListener;
     36     private CharSequence mContentTitle;
     37     private CharSequence mContentDescription;
     38 
     39     public LinkablePreference(Context ctx, AttributeSet attrs, int defStyle) {
     40         super(ctx, attrs, defStyle);
     41         setSelectable(false);
     42     }
     43 
     44     public LinkablePreference(Context ctx, AttributeSet attrs) {
     45         super(ctx, attrs);
     46         setSelectable(false);
     47     }
     48 
     49     public LinkablePreference(Context ctx) {
     50         super(ctx);
     51         setSelectable(false);
     52     }
     53 
     54     @Override
     55     public void onBindViewHolder(PreferenceViewHolder view) {
     56         super.onBindViewHolder(view);
     57 
     58         TextView textView = (TextView) view.findViewById(android.R.id.title);
     59         if (textView == null) {
     60             return;
     61         }
     62         textView.setSingleLine(false);
     63 
     64         if (mContentTitle == null || mClickListener == null) {
     65             return;
     66         }
     67 
     68         StringBuilder contentBuilder = new StringBuilder().append(mContentTitle);
     69         if (mContentDescription != null) {
     70             contentBuilder.append("\n\n");
     71             contentBuilder.append(mContentDescription);
     72         }
     73 
     74         boolean linked = LinkifyUtils.linkify(textView, contentBuilder, mClickListener);
     75         if (linked && mContentTitle != null) {
     76             // Embolden and enlarge the title.
     77             Spannable boldSpan = (Spannable) textView.getText();
     78             boldSpan.setSpan(
     79                     new TextAppearanceSpan(
     80                             getContext(), android.R.style.TextAppearance_Medium),
     81                     0,
     82                     mContentTitle.length(),
     83                     Spannable.SPAN_INCLUSIVE_EXCLUSIVE);
     84             textView.setText(boldSpan);
     85             textView.setMovementMethod(new LinkMovementMethod());
     86         }
     87     }
     88 
     89     /**
     90      * Sets the linkable text for the Preference title.
     91      * @param contentTitle text to set the Preference title.
     92      * @param contentDescription description text to append underneath title, can be null.
     93      * @param clickListener OnClickListener for the link portion of the text.
     94      */
     95     public void setText(
     96             CharSequence contentTitle,
     97             @Nullable CharSequence contentDescription,
     98             LinkifyUtils.OnClickListener clickListener) {
     99         mContentTitle = contentTitle;
    100         mContentDescription = contentDescription;
    101         mClickListener = clickListener;
    102         // sets the title so that the title TextView is not hidden in super.onBindViewHolder()
    103         super.setTitle(contentTitle);
    104     }
    105 
    106     /**
    107      * Sets the title of the LinkablePreference. resets linkable text for reusability.
    108      */
    109     @Override
    110     public void setTitle(int titleResId) {
    111         mContentTitle = null;
    112         mContentDescription = null;
    113         super.setTitle(titleResId);
    114     }
    115 
    116     /**
    117      * Sets the title of the LinkablePreference. resets linkable text for reusability.
    118      */
    119     @Override
    120     public void setTitle(CharSequence title) {
    121         mContentTitle = null;
    122         mContentDescription = null;
    123         super.setTitle(title);
    124     }
    125 }
    126