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 17 package android.text; 18 19 import android.graphics.BaseCanvas; 20 import android.graphics.Canvas; 21 import 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 */ 29 public 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
