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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 import android.view.accessibility.AccessibilityEvent;
     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 defStyle) {
     60         super(context, attrs, defStyle);
     61     }
     62 
     63     @Override
     64     protected boolean getDefaultEditable() {
     65         return true;
     66     }
     67 
     68     @Override
     69     protected MovementMethod getDefaultMovementMethod() {
     70         return ArrowKeyMovementMethod.getInstance();
     71     }
     72 
     73     @Override
     74     public Editable getText() {
     75         return (Editable) super.getText();
     76     }
     77 
     78     @Override
     79     public void setText(CharSequence text, BufferType type) {
     80         super.setText(text, BufferType.EDITABLE);
     81     }
     82 
     83     /**
     84      * Convenience for {@link Selection#setSelection(Spannable, int, int)}.
     85      */
     86     public void setSelection(int start, int stop) {
     87         Selection.setSelection(getText(), start, stop);
     88     }
     89 
     90     /**
     91      * Convenience for {@link Selection#setSelection(Spannable, int)}.
     92      */
     93     public void setSelection(int index) {
     94         Selection.setSelection(getText(), index);
     95     }
     96 
     97     /**
     98      * Convenience for {@link Selection#selectAll}.
     99      */
    100     public void selectAll() {
    101         Selection.selectAll(getText());
    102     }
    103 
    104     /**
    105      * Convenience for {@link Selection#extendSelection}.
    106      */
    107     public void extendSelection(int index) {
    108         Selection.extendSelection(getText(), index);
    109     }
    110 
    111     @Override
    112     public void setEllipsize(TextUtils.TruncateAt ellipsis) {
    113         if (ellipsis == TextUtils.TruncateAt.MARQUEE) {
    114             throw new IllegalArgumentException("EditText cannot use the ellipsize mode "
    115                     + "TextUtils.TruncateAt.MARQUEE");
    116         }
    117         super.setEllipsize(ellipsis);
    118     }
    119 
    120     @Override
    121     public void onInitializeAccessibilityEvent(AccessibilityEvent event) {
    122         super.onInitializeAccessibilityEvent(event);
    123         event.setClassName(EditText.class.getName());
    124     }
    125 
    126     @Override
    127     public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) {
    128         super.onInitializeAccessibilityNodeInfo(info);
    129         info.setClassName(EditText.class.getName());
    130     }
    131 }
    132