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.drawable.Drawable;
20import android.graphics.Paint;
21import android.graphics.Canvas;
22import android.text.Spanned;
23import android.text.Layout;
24
25public class DrawableMarginSpan
26implements LeadingMarginSpan, LineHeightSpan
27{
28    public DrawableMarginSpan(Drawable b) {
29        mDrawable = b;
30    }
31
32    public DrawableMarginSpan(Drawable b, int pad) {
33        mDrawable = b;
34        mPad = pad;
35    }
36
37    public int getLeadingMargin(boolean first) {
38        return mDrawable.getIntrinsicWidth() + mPad;
39    }
40
41    public void drawLeadingMargin(Canvas c, Paint p, int x, int dir,
42                                  int top, int baseline, int bottom,
43                                  CharSequence text, int start, int end,
44                                  boolean first, Layout layout) {
45        int st = ((Spanned) text).getSpanStart(this);
46        int ix = (int)x;
47        int itop = (int)layout.getLineTop(layout.getLineForOffset(st));
48
49        int dw = mDrawable.getIntrinsicWidth();
50        int dh = mDrawable.getIntrinsicHeight();
51
52        // XXX What to do about Paint?
53        mDrawable.setBounds(ix, itop, ix+dw, itop+dh);
54        mDrawable.draw(c);
55    }
56
57    public void chooseHeight(CharSequence text, int start, int end,
58                             int istartv, int v,
59                             Paint.FontMetricsInt fm) {
60        if (end == ((Spanned) text).getSpanEnd(this)) {
61            int ht = mDrawable.getIntrinsicHeight();
62
63            int need = ht - (v + fm.descent - fm.ascent - istartv);
64            if (need > 0)
65                fm.descent += need;
66
67            need = ht - (v + fm.bottom - fm.top - istartv);
68            if (need > 0)
69                fm.bottom += need;
70        }
71    }
72
73    private Drawable mDrawable;
74    private int mPad;
75}
76