1 /* 2 * Copyright (C) 2018 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.graphics.text; 18 19 import com.android.layoutlib.bridge.impl.DelegateManager; 20 import com.android.tools.layoutlib.annotations.LayoutlibDelegate; 21 22 import android.graphics.Rect; 23 import android.graphics.text.LineBreaker_Delegate.Builder; 24 import android.graphics.text.LineBreaker_Delegate.Run; 25 26 import libcore.util.NativeAllocationRegistry_Delegate; 27 28 /** 29 * Delegate that provides implementation for native methods in 30 * {@link android.graphics.text.MeasuredText} 31 * <p/> 32 * Through the layoutlib_create tool, selected methods of StaticLayout have been replaced 33 * by calls to methods of the same name in this delegate class. 34 * 35 */ 36 public class MeasuredText_Delegate { 37 38 // ---- Builder delegate manager ---- 39 protected static final DelegateManager<MeasuredText_Delegate> sManager = 40 new DelegateManager<>(MeasuredText_Delegate.class); 41 private static long sFinalizer = -1; 42 43 protected long mNativeBuilderPtr; 44 45 @LayoutlibDelegate nGetWidth(long nativePtr, int start, int end)46 /*package*/ static float nGetWidth(long nativePtr, int start, int end) { 47 // Ignore as it is not used for the layoutlib implementation 48 return 0.0f; 49 } 50 51 @LayoutlibDelegate nGetReleaseFunc()52 /*package*/ static long nGetReleaseFunc() { 53 synchronized (MeasuredText_Delegate.class) { 54 if (sFinalizer == -1) { 55 sFinalizer = NativeAllocationRegistry_Delegate.createFinalizer( 56 sManager::removeJavaReferenceFor); 57 } 58 } 59 return sFinalizer; 60 } 61 62 @LayoutlibDelegate nGetMemoryUsage(long nativePtr)63 /*package*/ static int nGetMemoryUsage(long nativePtr) { 64 // Ignore as it is not used for the layoutlib implementation 65 return 0; 66 } 67 68 @LayoutlibDelegate nGetBounds(long nativePtr, char[] buf, int start, int end, Rect rect)69 /*package*/ static void nGetBounds(long nativePtr, char[] buf, int start, int end, Rect rect) { 70 // Ignore as it is not used for the layoutlib implementation 71 } 72 73 @LayoutlibDelegate nGetCharWidthAt(long nativePtr, int offset)74 /*package*/ static float nGetCharWidthAt(long nativePtr, int offset) { 75 // Ignore as it is not used for the layoutlib implementation 76 return 0.0f; 77 } 78 computeRuns(long measuredTextPtr, Builder staticLayoutBuilder)79 public static void computeRuns(long measuredTextPtr, Builder staticLayoutBuilder) { 80 MeasuredText_Delegate delegate = sManager.getDelegate(measuredTextPtr); 81 if (delegate == null) { 82 return; 83 } 84 MeasuredText_Builder_Delegate builder = 85 MeasuredText_Builder_Delegate.sBuilderManager.getDelegate(delegate.mNativeBuilderPtr); 86 if (builder == null) { 87 return; 88 } 89 for (Run run: builder.mRuns) { 90 run.addTo(staticLayoutBuilder); 91 } 92 } 93 }