基于0.47reactnative android源码修改.zip

/** * Copyright (c) 2015-present, Facebook, Inc. * All rights reserved. * * This source code is licensed under the BSD-style license found in the * LICENSE file in the root directory of this source tree. An additional grant * of patent rights can be found in the PATENTS file in the same directory. */ package com.facebook.react.flat; import javax.annotation.Nullable; import java.lang.ref.WeakReference; import java.util.ArrayList; import android.annotation.SuppressLint; import android.content.Context; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.graphics.Rect; import android.graphics.Typeface; import android.graphics.drawable.Drawable; import android.util.SparseArray; import android.util.SparseIntArray; import android.view.MotionEvent; import android.view.View; import android.view.ViewGroup; import android.view.ViewParent; import com.facebook.infer.annotation.Assertions; import com.facebook.react.bridge.ReactContext; import com.facebook.react.bridge.SoftAssertions; import com.facebook.react.touch.OnInterceptTouchEventListener; import com.facebook.react.touch.ReactHitSlopView; import com.facebook.react.touch.ReactInterceptingViewGroup; import com.facebook.react.uimanager.PointerEvents; import com.facebook.react.uimanager.ReactCompoundViewGroup; import com.facebook.react.uimanager.ReactPointerEventsView; import com.facebook.react.uimanager.UIManagerModule; import com.facebook.react.views.image.ImageLoadEvent; import com.facebook.react.uimanager.ReactClippingViewGroup; /** * A view that the {@link FlatShadowNode} hierarchy maps to. Can mount and draw native views as * well as draw commands. We reuse some of Android's ViewGroup logic, but in Nodes we try to * minimize the amount of shadow nodes that map to native children, so we have a lot of logic * specific to draw commands. * * In a very simple case with no Android children, the FlatViewGroup will receive: * * flatViewGroup.mountDrawCommands(...); * flatViewGroup.dispatchDraw(...); * * The draw commands are mounted, then draw iterates through and draws them one by one. * * In a simple case where there are native children: * * flatViewGroup.mountDrawCommands(...); * flatViewGroup.detachAllViewsFromParent(...); * flatViewGroup.mountViews(...); * flatViewGroup.dispatchDraw(...); * * Draw commands are mounted, with a draw view command for each mounted view. As an optimization * we then detach all views from the FlatViewGroup, then allow mountViews to selectively reattach * and add views in order. We do this as adding a single view is a O(n) operation (On average you * have to move all the views in the array to the right one position), as is dropping and re-adding * all views (One pass to clear the array and one pass to re-attach detached children and add new * children). * * FlatViewGroups also have arrays of node regions, which are little more than a rects that * represents a touch target. Native views contain their own touch logic, but not all react tags * map to native views. We use node regions to find touch targets among commands as well as nodes * which map to native views. * * In the case of clipping, much of the underlying logic for is handled by * {@link DrawCommandManager}. This lets us separate logic, while also allowing us to save on * memory for data structures only used in clipping. In a case of a clipping FlatViewGroup which * is scrolling: * * flatViewGroup.setRemoveClippedSubviews(true); * flatViewGroup.mountClippingDrawCommands(...); * flatViewGroup.detachAllViewsFromParent(...); * flatViewGroup.mountViews(...); * flatViewGroup.updateClippingRect(...); * flatViewGroup.dispatchDraw(...); * flatViewGroup.updateClippingRect(...); * flatViewGroup.dispatchDraw(...); * flatViewGroup.updateClippingRect(...); * flatViewGroup.dispatchDraw(...); * * Setting remove clipped subviews creates a {@link DrawCommandManager} to handle clipping, which * allows the rest of the methods to simply call in to draw command manager to handle the clipping * logic. */ /* package */ final class FlatViewGroup extends ViewGroup implements ReactInterceptingViewGroup, ReactClippingViewGroup, ReactCompoundViewGroup, ReactHitSlopView, ReactPointerEventsView, FlatMeasuredViewGroup { /** * Helper class that allows our AttachDetachListeners to invalidate the hosting View. When a * listener gets an attach it is passed an invalidate callback for the FlatViewGroup it is being * attached to. */ static final class InvalidateCallback extends WeakReference<FlatViewGroup> { private InvalidateCallback(FlatViewGroup view) { super(view); } /** * Propagates invalidate() call up to the hosting View (if it's still alive) */ public void invalidate() { FlatViewGroup view = get(); if (view != null) { view.invalidate(); } } /** * Propogates image load events to javascript if the hosting view is still alive. * * @param reactTag The view id. * @param imageLoadEvent The event type. */ public void dispatchImageLoadEvent(int reactTag, int imageLoadEvent) { FlatViewGroup view = get(); if (view == null) { return; } ReactContext reactContext = ((ReactContext) view.getContext()); UIManagerModule uiManagerModule = reactContext.getNativeModule(UIManagerModule.class); uiManagerModule.getEventDispatcher().dispatchEvent( new ImageLoadEvent(reactTag, imageLoadEvent)); } } // Draws the name of the draw commands at the bottom right corner of it's bounds. private static final boolean DEBUG_DRAW_TEXT = false; // Draws colored rectangles over known performance issues. /* package */ static final boolean DEBUG_HIGHLIGHT_PERFORMANCE_ISSUES = false; // Force layout bounds drawing. This can also be enabled by turning on layout bounds in Android. private static final boolean DEBUG_DRAW = DEBUG_DRAW_TEXT || DEBUG_HIGHLIGHT_PERFORMANCE_ISSUES; // Resources for debug drawing. private boolean mAndroidDebugDraw; private static Paint sDebugTextPaint; private static Paint sDebugTextBackgroundPaint; private static Paint sDebugRectPaint; private static Paint sDebugCornerPaint; private static Rect sDebugRect; private static final ArrayList<FlatViewGroup> LAYOUT_REQUESTS = new ArrayList<>(); private static final Rect VIEW_BOUNDS = new Rect(); // An invalidate callback singleton for this FlatViewGroup. private @Nullable InvalidateCallback mInvalidateCallback; private DrawCommand[] mDrawCommands = DrawCommand.EMPTY_ARRAY; private AttachDetachListener[] mAttachDetachListeners = AttachDetachListener.EMPTY_ARRAY; private NodeRegion[] mNodeRegions = NodeRegion.EMPTY_ARRAY; // The index of the next native child to draw. This is used in dispatchDraw to check that we are // actually drawing all of our attached children, then is reset to 0. private int mDrawChildIndex = 0; private boolean mIsAttached = false; private boolean mIsLayoutRequested = false; private boolean mNeedsOffscreenAlphaCompositing = false; private Drawable mHotspot; private PointerEvents mPointerEvents = PointerEvents.AUTO; private long mLastTouchDownTime; private @Nullable OnInterceptTouchEventListener mOnInterceptTouchEventListener; private static final SparseArray<View> EMPTY_DETACHED_VIEWS = new SparseArray<>(0); // Provides clipping, drawing and node region finding logic if subview clipping is enabled. private @Nullable DrawCommandManager mDrawCommandManager; private @Nullable Rect mHitSlopRect; /* package */ FlatViewGroup(Context context) { super(context); setClipChildren(false); } @Override protected void detachAllViewsFromParent() { super.detachAllViewsFromParent(); } @Override @SuppressLint("MissingSuperCall") public void requestLayout() { if (mIsLayoutReque