LeadingMarginSpan.java revision d24b8183b93e781080b2c16c487e60d51c12da31 
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
17package android.text.style;
18
19import android.graphics.Paint;
20import android.graphics.Canvas;
21import android.os.Parcel;
22import android.text.Layout;
23import android.text.ParcelableSpan;
24import android.text.TextUtils;
25
26public interface LeadingMarginSpan
27extends ParagraphStyle
28{
29    public int getLeadingMargin(boolean first);
30    public void drawLeadingMargin(Canvas c, Paint p,
31                                  int x, int dir,
32                                  int top, int baseline, int bottom,
33                                  CharSequence text, int start, int end,
34                                  boolean first, Layout layout);
35
36    public static class Standard implements LeadingMarginSpan, ParcelableSpan {
37        private final int mFirst, mRest;
38
39        public Standard(int first, int rest) {
40            mFirst = first;
41            mRest = rest;
42        }
43
44        public Standard(int every) {
45            this(every, every);
46        }
47
48        public Standard(Parcel src) {
49            mFirst = src.readInt();
50            mRest = src.readInt();
51        }
52
53        public int getSpanTypeId() {
54            return TextUtils.LEADING_MARGIN_SPAN;
55        }
56
57        public int describeContents() {
58            return 0;
59        }
60
61        public void writeToParcel(Parcel dest, int flags) {
62            dest.writeInt(mFirst);
63            dest.writeInt(mRest);
64        }
65
66        public int getLeadingMargin(boolean first) {
67            return first ? mFirst : mRest;
68        }
69
70        public void drawLeadingMargin(Canvas c, Paint p,
71                                      int x, int dir,
72                                      int top, int baseline, int bottom,
73                                      CharSequence text, int start, int end,
74                                      boolean first, Layout layout) {
75            ;
76        }
77    }
78}
79