1a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes/* 2ac5fe7c617c66850fff75a9fce9979c6e5674b0fAurimas Liutikas * Copyright 2018 The Android Open Source Project 3a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * 4a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * Licensed under the Apache License, Version 2.0 (the "License"); 5a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * you may not use this file except in compliance with the License. 6a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * You may obtain a copy of the License at 7a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * 8a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * http://www.apache.org/licenses/LICENSE-2.0 9a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * 10a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * Unless required by applicable law or agreed to in writing, software 11a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * distributed under the License is distributed on an "AS IS" BASIS, 12a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * See the License for the specific language governing permissions and 14a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * limitations under the License. 15a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes */ 16a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 17ac5fe7c617c66850fff75a9fce9979c6e5674b0fAurimas Liutikaspackage androidx.coordinatorlayout.widget; 1886be5dd64c0061b84b5a77d923d0a337d156937eKirill Grouchnikov 19ac5fe7c617c66850fff75a9fce9979c6e5674b0fAurimas Liutikasimport static androidx.annotation.RestrictTo.Scope.LIBRARY; 20a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 21eb316dbe383d6bba158527b2eafa9b7c982dbd99Aurimas Liutikasimport android.graphics.Matrix; 22a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banesimport android.graphics.Rect; 23eb316dbe383d6bba158527b2eafa9b7c982dbd99Aurimas Liutikasimport android.graphics.RectF; 24a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banesimport android.view.View; 25a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banesimport android.view.ViewGroup; 26eb316dbe383d6bba158527b2eafa9b7c982dbd99Aurimas Liutikasimport android.view.ViewParent; 27a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 284464b955661a7c40f1dd16543f01ccef06fe011bAurimas Liutikasimport androidx.annotation.RestrictTo; 294464b955661a7c40f1dd16543f01ccef06fe011bAurimas Liutikas 3086be5dd64c0061b84b5a77d923d0a337d156937eKirill Grouchnikov/** 3186be5dd64c0061b84b5a77d923d0a337d156937eKirill Grouchnikov * @hide 3286be5dd64c0061b84b5a77d923d0a337d156937eKirill Grouchnikov */ 3386be5dd64c0061b84b5a77d923d0a337d156937eKirill Grouchnikov@RestrictTo(LIBRARY) 3486be5dd64c0061b84b5a77d923d0a337d156937eKirill Grouchnikovpublic class ViewGroupUtils { 35eb316dbe383d6bba158527b2eafa9b7c982dbd99Aurimas Liutikas private static final ThreadLocal<Matrix> sMatrix = new ThreadLocal<>(); 36eb316dbe383d6bba158527b2eafa9b7c982dbd99Aurimas Liutikas private static final ThreadLocal<RectF> sRectF = new ThreadLocal<>(); 37a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 38a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes /** 39a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * This is a port of the common 40a3f5b46ad2146979910e577297880ebbceab8858Kirill Grouchnikov * {@link ViewGroup#offsetDescendantRectToMyCoords(View, Rect)} 41a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * from the framework, but adapted to take transformations into account. The result 42a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * will be the bounding rect of the real transformed rect. 43a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * 44a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * @param descendant view defining the original coordinate system of rect 45a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * @param rect (in/out) the rect to offset from descendant to this view's coordinate system 46a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes */ 47a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes static void offsetDescendantRect(ViewGroup parent, View descendant, Rect rect) { 48eb316dbe383d6bba158527b2eafa9b7c982dbd99Aurimas Liutikas Matrix m = sMatrix.get(); 49eb316dbe383d6bba158527b2eafa9b7c982dbd99Aurimas Liutikas if (m == null) { 50eb316dbe383d6bba158527b2eafa9b7c982dbd99Aurimas Liutikas m = new Matrix(); 51eb316dbe383d6bba158527b2eafa9b7c982dbd99Aurimas Liutikas sMatrix.set(m); 52eb316dbe383d6bba158527b2eafa9b7c982dbd99Aurimas Liutikas } else { 53eb316dbe383d6bba158527b2eafa9b7c982dbd99Aurimas Liutikas m.reset(); 54eb316dbe383d6bba158527b2eafa9b7c982dbd99Aurimas Liutikas } 55eb316dbe383d6bba158527b2eafa9b7c982dbd99Aurimas Liutikas 56eb316dbe383d6bba158527b2eafa9b7c982dbd99Aurimas Liutikas offsetDescendantMatrix(parent, descendant, m); 57eb316dbe383d6bba158527b2eafa9b7c982dbd99Aurimas Liutikas 58eb316dbe383d6bba158527b2eafa9b7c982dbd99Aurimas Liutikas RectF rectF = sRectF.get(); 59eb316dbe383d6bba158527b2eafa9b7c982dbd99Aurimas Liutikas if (rectF == null) { 60eb316dbe383d6bba158527b2eafa9b7c982dbd99Aurimas Liutikas rectF = new RectF(); 61eb316dbe383d6bba158527b2eafa9b7c982dbd99Aurimas Liutikas sRectF.set(rectF); 62eb316dbe383d6bba158527b2eafa9b7c982dbd99Aurimas Liutikas } 63eb316dbe383d6bba158527b2eafa9b7c982dbd99Aurimas Liutikas rectF.set(rect); 64eb316dbe383d6bba158527b2eafa9b7c982dbd99Aurimas Liutikas m.mapRect(rectF); 65eb316dbe383d6bba158527b2eafa9b7c982dbd99Aurimas Liutikas rect.set((int) (rectF.left + 0.5f), (int) (rectF.top + 0.5f), 66eb316dbe383d6bba158527b2eafa9b7c982dbd99Aurimas Liutikas (int) (rectF.right + 0.5f), (int) (rectF.bottom + 0.5f)); 67a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 68a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 69a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes /** 70a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * Retrieve the transformed bounding rect of an arbitrary descendant view. 71a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * This does not need to be a direct child. 72a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * 73a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * @param descendant descendant view to reference 74a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * @param out rect to set to the bounds of the descendant view 75a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes */ 7686be5dd64c0061b84b5a77d923d0a337d156937eKirill Grouchnikov public static void getDescendantRect(ViewGroup parent, View descendant, Rect out) { 77a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes out.set(0, 0, descendant.getWidth(), descendant.getHeight()); 78a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes offsetDescendantRect(parent, descendant, out); 79a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 80a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 81eb316dbe383d6bba158527b2eafa9b7c982dbd99Aurimas Liutikas private static void offsetDescendantMatrix(ViewParent target, View view, Matrix m) { 82eb316dbe383d6bba158527b2eafa9b7c982dbd99Aurimas Liutikas final ViewParent parent = view.getParent(); 83eb316dbe383d6bba158527b2eafa9b7c982dbd99Aurimas Liutikas if (parent instanceof View && parent != target) { 84eb316dbe383d6bba158527b2eafa9b7c982dbd99Aurimas Liutikas final View vp = (View) parent; 85eb316dbe383d6bba158527b2eafa9b7c982dbd99Aurimas Liutikas offsetDescendantMatrix(target, vp, m); 86eb316dbe383d6bba158527b2eafa9b7c982dbd99Aurimas Liutikas m.preTranslate(-vp.getScrollX(), -vp.getScrollY()); 87eb316dbe383d6bba158527b2eafa9b7c982dbd99Aurimas Liutikas } 88eb316dbe383d6bba158527b2eafa9b7c982dbd99Aurimas Liutikas 89eb316dbe383d6bba158527b2eafa9b7c982dbd99Aurimas Liutikas m.preTranslate(view.getLeft(), view.getTop()); 90eb316dbe383d6bba158527b2eafa9b7c982dbd99Aurimas Liutikas 91eb316dbe383d6bba158527b2eafa9b7c982dbd99Aurimas Liutikas if (!view.getMatrix().isIdentity()) { 92eb316dbe383d6bba158527b2eafa9b7c982dbd99Aurimas Liutikas m.preConcat(view.getMatrix()); 93eb316dbe383d6bba158527b2eafa9b7c982dbd99Aurimas Liutikas } 94eb316dbe383d6bba158527b2eafa9b7c982dbd99Aurimas Liutikas } 950f4ca634bbc43ddff900c35f7d2a43b55d8c830dJake Wharton 960f4ca634bbc43ddff900c35f7d2a43b55d8c830dJake Wharton private ViewGroupUtils() { 970f4ca634bbc43ddff900c35f7d2a43b55d8c830dJake Wharton } 98a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes} 99