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      1 /*
      2  * Copyright (C) 2006 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 android.widget;
     18 
     19 import android.content.Context;
     20 import android.os.Bundle;
     21 import android.text.Editable;
     22 import android.text.Selection;
     23 import android.text.Spannable;
     24 import android.text.TextUtils;
     25 import android.text.method.ArrowKeyMovementMethod;
     26 import android.text.method.MovementMethod;
     27 import android.util.AttributeSet;
     28 import android.view.accessibility.AccessibilityNodeInfo;
     29 
     30 
     31 /*
     32  * This is supposed to be a *very* thin veneer over TextView.
     33  * Do not make any changes here that do anything that a TextView
     34  * with a key listener and a movement method wouldn't do!
     35  */
     36 
     37 /**
     38  * EditText is a thin veneer over TextView that configures itself
     39  * to be editable.
     40  *
     41  * <p>See the <a href="{@docRoot}guide/topics/ui/controls/text.html">Text Fields</a>
     42  * guide.</p>
     43  * <p>
     44  * <b>XML attributes</b>
     45  * <p>
     46  * See {@link android.R.styleable#EditText EditText Attributes},
     47  * {@link android.R.styleable#TextView TextView Attributes},
     48  * {@link android.R.styleable#View View Attributes}
     49  */
     50 public class EditText extends TextView {
     51     public EditText(Context context) {
     52         this(context, null);
     53     }
     54 
     55     public EditText(Context context, AttributeSet attrs) {
     56         this(context, attrs, com.android.internal.R.attr.editTextStyle);
     57     }
     58 
     59     public EditText(Context context, AttributeSet attrs, int defStyleAttr) {
     60         this(context, attrs, defStyleAttr, 0);
     61     }
     62 
     63     public EditText(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
     64         super(context, attrs, defStyleAttr, defStyleRes);
     65     }
     66 
     67     @Override
     68     protected boolean getDefaultEditable() {
     69         return true;
     70     }
     71 
     72     @Override
     73     protected MovementMethod getDefaultMovementMethod() {
     74         return ArrowKeyMovementMethod.getInstance();
     75     }
     76 
     77     @Override
     78     public Editable getText() {
     79         return (Editable) super.getText();
     80     }
     81 
     82     @Override
     83     public void setText(CharSequence text, BufferType type) {
     84         super.setText(text, BufferType.EDITABLE);
     85     }
     86 
     87     /**
     88      * Convenience for {@link Selection#setSelection(Spannable, int, int)}.
     89      */
     90     public void setSelection(int start, int stop) {
     91         Selection.setSelection(getText(), start, stop);
     92     }
     93 
     94     /**
     95      * Convenience for {@link Selection#setSelection(Spannable, int)}.
     96      */
     97     public void setSelection(int index) {
     98         Selection.setSelection(getText(), index);
     99     }
    100 
    101     /**
    102      * Convenience for {@link Selection#selectAll}.
    103      */
    104     public void selectAll() {
    105         Selection.selectAll(getText());
    106     }
    107 
    108     /**
    109      * Convenience for {@link Selection#extendSelection}.
    110      */
    111     public void extendSelection(int index) {
    112         Selection.extendSelection(getText(), index);
    113     }
    114 
    115     @Override
    116     public void setEllipsize(TextUtils.TruncateAt ellipsis) {
    117         if (ellipsis == TextUtils.TruncateAt.MARQUEE) {
    118             throw new IllegalArgumentException("EditText cannot use the ellipsize mode "
    119                     + "TextUtils.TruncateAt.MARQUEE");
    120         }
    121         super.setEllipsize(ellipsis);
    122     }
    123 
    124     @Override
    125     public CharSequence getAccessibilityClassName() {
    126         return EditText.class.getName();
    127     }
    128 
    129     /** @hide */
    130     @Override
    131     public boolean performAccessibilityActionInternal(int action, Bundle arguments) {
    132         switch (action) {
    133             case AccessibilityNodeInfo.ACTION_SET_TEXT: {
    134                 CharSequence text = (arguments != null) ? arguments.getCharSequence(
    135                         AccessibilityNodeInfo.ACTION_ARGUMENT_SET_TEXT_CHARSEQUENCE) : null;
    136                 setText(text);
    137                 if (text != null && text.length() > 0) {
    138                     setSelection(text.length());
    139                 }
    140                 return true;
    141             }
    142             default: {
    143                 return super.performAccessibilityActionInternal(action, arguments);
    144             }
    145         }
    146     }
    147 }
    148