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;
18
19import android.graphics.Canvas;
20import android.graphics.Paint;
21
22/**
23 * Please implement this interface if your CharSequence can do quick
24 * draw/measure/widths calculations from an internal array.
25 * {@hide}
26 */
27public interface GraphicsOperations
28extends CharSequence
29{
30    /**
31     * Just like {@link Canvas#drawText}.
32     */
33    void drawText(Canvas c, int start, int end,
34                         float x, float y, Paint p);
35
36    /**
37     * Just like {@link Canvas#drawTextRun}.
38     * {@hide}
39     */
40    void drawTextRun(Canvas c, int start, int end, int contextStart, int contextEnd,
41            float x, float y, boolean isRtl, Paint p);
42
43   /**
44     * Just like {@link Paint#measureText}.
45     */
46    float measureText(int start, int end, Paint p);
47
48    /**
49     * Just like {@link Paint#getTextWidths}.
50     */
51    public int getTextWidths(int start, int end, float[] widths, Paint p);
52
53    /**
54     * Just like {@link Paint#getTextRunAdvances}.
55     * @hide
56     */
57    float getTextRunAdvances(int start, int end, int contextStart, int contextEnd,
58            boolean isRtl, float[] advances, int advancesIndex, Paint paint);
59
60    /**
61     * Just like {@link Paint#getTextRunCursor}.
62     * @hide
63     */
64    int getTextRunCursor(int contextStart, int contextEnd, int dir, int offset,
65            int cursorOpt, Paint p);
66}
67