19066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/* 29066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Copyright (C) 2006 The Android Open Source Project 39066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 49066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Licensed under the Apache License, Version 2.0 (the "License"); 59066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * you may not use this file except in compliance with the License. 69066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * You may obtain a copy of the License at 79066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 89066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * http://www.apache.org/licenses/LICENSE-2.0 99066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Unless required by applicable law or agreed to in writing, software 119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * distributed under the License is distributed on an "AS IS" BASIS, 129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * See the License for the specific language governing permissions and 149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * limitations under the License. 159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectpackage android.graphics; 189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectpublic class RegionIterator { 209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Construct an iterator for all of the rectangles in a region. This 239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * effectively makes a private copy of the region, so any subsequent edits 249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * to region will not affect the iterator. 259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param region the region that will be iterated 279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public RegionIterator(Region region) { 299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mNativeIter = nativeConstructor(region.ni()); 309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Return the next rectangle in the region. If there are no more rectangles 349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * this returns false and r is unchanged. If there is at least one more, 359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * this returns true and r is set to that rectangle. 369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public final boolean next(Rect r) { 389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (r == null) { 399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new NullPointerException("The Rect must be provided"); 409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return nativeNext(mNativeIter, r); 429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected void finalize() throws Throwable { 459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project nativeDestructor(mNativeIter); 469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4836bef0bf30d6bae48cf3837df351075ca4fce654Ashok Bhat private static native long nativeConstructor(long native_region); 4936bef0bf30d6bae48cf3837df351075ca4fce654Ashok Bhat private static native void nativeDestructor(long native_iter); 5036bef0bf30d6bae48cf3837df351075ca4fce654Ashok Bhat private static native boolean nativeNext(long native_iter, Rect r); 5136bef0bf30d6bae48cf3837df351075ca4fce654Ashok Bhat 5236bef0bf30d6bae48cf3837df351075ca4fce654Ashok Bhat private final long mNativeIter; 539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project} 549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 55