1/*
2 * Copyright (C) 2008 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
17package android.text.style;
18
19import android.text.TextPaint;
20import android.view.View;
21
22/**
23 * If an object of this type is attached to the text of a TextView
24 * with a movement method of LinkMovementMethod, the affected spans of
25 * text can be selected. If selected and clicked, the {@link #onClick} method will
26 * be called.
27 */
28public abstract class ClickableSpan extends CharacterStyle implements UpdateAppearance {
29    private static int sIdCounter = 0;
30
31    private int mId = sIdCounter++;
32
33    /**
34     * Performs the click action associated with this span.
35     */
36    public abstract void onClick(View widget);
37
38    /**
39     * Makes the text underlined and in the link color.
40     */
41    @Override
42    public void updateDrawState(TextPaint ds) {
43        ds.setColor(ds.linkColor);
44        ds.setUnderlineText(true);
45    }
46
47    /**
48     * Get the unique ID for this span.
49     *
50     * @return The unique ID.
51     * @hide
52     */
53    public int getId() {
54        return mId;
55    }
56}
57