mirror of
https://github.com/zhigang1992/react-native.git
synced 2026-02-06 22:44:22 +08:00
a636ddd9f0
Summary: public We're seeing related crashes. The diff has no tests, the perf tests weren't conclusive, and the person who'd be supporting it no longer is available to work on it. We can try this again later in a less rushed manner with proper perf testing. Reviewed By: davidaurelio Differential Revision: D2696615 fb-gh-sync-id: 3b6814ac12af19516146d5c42d2add8321b10db5
97 lines
4.0 KiB
Java
97 lines
4.0 KiB
Java
/**
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* Copyright (c) 2015-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*/
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package com.facebook.react.uimanager;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Map;
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import android.util.DisplayMetrics;
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import com.facebook.react.common.MapBuilder;
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/**
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* Helps generate constants map for {@link UIManagerModule} by collecting and merging constants from
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* registered view managers.
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*/
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/* package */ class UIManagerModuleConstantsHelper {
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private static final String CUSTOM_BUBBLING_EVENT_TYPES_KEY = "customBubblingEventTypes";
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private static final String CUSTOM_DIRECT_EVENT_TYPES_KEY = "customDirectEventTypes";
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/**
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* Generates map of constants that is then exposed by {@link UIManagerModule}. The constants map
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* contains the following predefined fields for 'customBubblingEventTypes' and
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* 'customDirectEventTypes'. Provided list of {@param viewManagers} is then used to populate
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* content of those predefined fields using
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* {@link ViewManager#getExportedCustomBubblingEventTypeConstants} and
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* {@link ViewManager#getExportedCustomDirectEventTypeConstants} respectively. Each view manager
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* is in addition allowed to expose viewmanager-specific constants that are placed under the key
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* that corresponds to the view manager's name (see {@link ViewManager#getName}). Constants are
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* merged into the map of {@link UIManagerModule} base constants that is stored in
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* {@link UIManagerModuleConstants}.
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* TODO(6845124): Create a test for this
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*/
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/* package */ static Map<String, Object> createConstants(
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DisplayMetrics displayMetrics,
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List<ViewManager> viewManagers) {
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Map<String, Object> constants = UIManagerModuleConstants.getConstants(displayMetrics);
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Map bubblingEventTypesConstants = UIManagerModuleConstants.getBubblingEventTypeConstants();
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Map directEventTypesConstants = UIManagerModuleConstants.getDirectEventTypeConstants();
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for (ViewManager viewManager : viewManagers) {
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Map viewManagerBubblingEvents = viewManager.getExportedCustomBubblingEventTypeConstants();
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if (viewManagerBubblingEvents != null) {
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recursiveMerge(bubblingEventTypesConstants, viewManagerBubblingEvents);
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}
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Map viewManagerDirectEvents = viewManager.getExportedCustomDirectEventTypeConstants();
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if (viewManagerDirectEvents != null) {
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recursiveMerge(directEventTypesConstants, viewManagerDirectEvents);
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}
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Map viewManagerConstants = MapBuilder.newHashMap();
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Map customViewConstants = viewManager.getExportedViewConstants();
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if (customViewConstants != null) {
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viewManagerConstants.put("Constants", customViewConstants);
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}
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Map viewManagerCommands = viewManager.getCommandsMap();
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if (viewManagerCommands != null) {
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viewManagerConstants.put("Commands", viewManagerCommands);
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}
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Map<String, String> viewManagerNativeProps = viewManager.getNativeProps();
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if (!viewManagerNativeProps.isEmpty()) {
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viewManagerConstants.put("NativeProps", viewManagerNativeProps);
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}
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if (!viewManagerConstants.isEmpty()) {
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constants.put(viewManager.getName(), viewManagerConstants);
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}
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}
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constants.put(CUSTOM_BUBBLING_EVENT_TYPES_KEY, bubblingEventTypesConstants);
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constants.put(CUSTOM_DIRECT_EVENT_TYPES_KEY, directEventTypesConstants);
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return constants;
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}
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/**
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* Merges {@param source} map into {@param dest} map recursively
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*/
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private static void recursiveMerge(Map dest, Map source) {
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for (Object key : source.keySet()) {
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Object sourceValue = source.get(key);
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Object destValue = dest.get(key);
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if (destValue != null && (sourceValue instanceof Map) && (destValue instanceof Map)) {
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recursiveMerge((Map) destValue, (Map) sourceValue);
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} else {
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dest.put(key, sourceValue);
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}
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}
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}
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}
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