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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.text.Editable;
     21 import android.text.Selection;
     22 import android.text.Spannable;
     23 import android.text.TextUtils;
     24 import android.text.method.ArrowKeyMovementMethod;
     25 import android.text.method.MovementMethod;
     26 import android.util.AttributeSet;
     27 
     28 
     29 /*
     30  * This is supposed to be a *very* thin veneer over TextView.
     31  * Do not make any changes here that do anything that a TextView
     32  * with a key listener and a movement method wouldn't do!
     33  */
     34 
     35 /**
     36  * EditText is a thin veneer over TextView that configures itself
     37  * to be editable.
     38  *
     39  * <p>See the <a href="{@docRoot}resources/tutorials/views/hello-formstuff.html">Form Stuff
     40  * tutorial</a>.</p>
     41  * <p>
     42  * <b>XML attributes</b>
     43  * <p>
     44  * See {@link android.R.styleable#EditText EditText Attributes},
     45  * {@link android.R.styleable#TextView TextView Attributes},
     46  * {@link android.R.styleable#View View Attributes}
     47  */
     48 public class EditText extends TextView {
     49     public EditText(Context context) {
     50         this(context, null);
     51     }
     52 
     53     public EditText(Context context, AttributeSet attrs) {
     54         this(context, attrs, com.android.internal.R.attr.editTextStyle);
     55     }
     56 
     57     public EditText(Context context, AttributeSet attrs, int defStyle) {
     58         super(context, attrs, defStyle);
     59     }
     60 
     61     @Override
     62     protected boolean getDefaultEditable() {
     63         return true;
     64     }
     65 
     66     @Override
     67     protected MovementMethod getDefaultMovementMethod() {
     68         return ArrowKeyMovementMethod.getInstance();
     69     }
     70 
     71     @Override
     72     public Editable getText() {
     73         return (Editable) super.getText();
     74     }
     75 
     76     @Override
     77     public void setText(CharSequence text, BufferType type) {
     78         super.setText(text, BufferType.EDITABLE);
     79     }
     80 
     81     /**
     82      * Convenience for {@link Selection#setSelection(Spannable, int, int)}.
     83      */
     84     public void setSelection(int start, int stop) {
     85         Selection.setSelection(getText(), start, stop);
     86     }
     87 
     88     /**
     89      * Convenience for {@link Selection#setSelection(Spannable, int)}.
     90      */
     91     public void setSelection(int index) {
     92         Selection.setSelection(getText(), index);
     93     }
     94 
     95     /**
     96      * Convenience for {@link Selection#selectAll}.
     97      */
     98     public void selectAll() {
     99         Selection.selectAll(getText());
    100     }
    101 
    102     /**
    103      * Convenience for {@link Selection#extendSelection}.
    104      */
    105     public void extendSelection(int index) {
    106         Selection.extendSelection(getText(), index);
    107     }
    108 
    109     @Override
    110     public void setEllipsize(TextUtils.TruncateAt ellipsis) {
    111         if (ellipsis == TextUtils.TruncateAt.MARQUEE) {
    112             throw new IllegalArgumentException("EditText cannot use the ellipsize mode "
    113                     + "TextUtils.TruncateAt.MARQUEE");
    114         }
    115         super.setEllipsize(ellipsis);
    116     }
    117 }
    118