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