mirror of
https://github.com/zhigang1992/react-native.git
synced 2026-02-07 17:27:56 +08:00
205a35ad37
Summary: public Native view recycling implementation based on limited pools of views. In this diff I introduced new UIManager method: dropViews. Instead of removing views from tag->view maps when they are detached we keep them there until we get a call to dropViews with the appropriate tag. JS may keep a pool of object and selectively decide not to enqueue drop for certain views. Then instead of removing those views it may decide to reuse tag that has been previously allocated for a view that is no longer in use. Special handling is required for layout-only nodes as they only can transition from layout-only to non-layout-only (reverse transition hasn't been implemented). Because of that we'd loose benefits of view flattening if we decide to recycle existing non-layout-only view as a layout-only one. This diff provides only a simple and manual method for configuring pools by calling `ReactNativeViewPool.configure` with a dict from native view name to the view count. Note that we may not want recycle all the views (e.g. when we render mapview we don't want to keep it in memory after it's detached) Reviewed By: davidaurelio Differential Revision: D2677289 fb-gh-sync-id: 29f44ce5b01db3ec353522af051b6a50924614a2
126 lines
4.6 KiB
Java
126 lines
4.6 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.Arrays;
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import java.util.HashSet;
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import com.facebook.csslayout.Spacing;
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import com.facebook.react.common.SetBuilder;
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/**
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* Keys for props that need to be shared across multiple classes.
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*/
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public class ViewProps {
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public static final String VIEW_CLASS_NAME = "RCTView";
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// Layout only (only affect positions of children, causes no drawing)
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// !!! Keep in sync with LAYOUT_ONLY_PROPS below
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public static final String ALIGN_ITEMS = "alignItems";
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public static final String ALIGN_SELF = "alignSelf";
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public static final String BOTTOM = "bottom";
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public static final String COLLAPSABLE = "collapsable";
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public static final String FLEX = "flex";
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public static final String FLEX_DIRECTION = "flexDirection";
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public static final String FLEX_WRAP = "flexWrap";
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public static final String HEIGHT = "height";
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public static final String JUSTIFY_CONTENT = "justifyContent";
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public static final String LEFT = "left";
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public static final String MARGIN = "margin";
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public static final String MARGIN_VERTICAL = "marginVertical";
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public static final String MARGIN_HORIZONTAL = "marginHorizontal";
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public static final String MARGIN_LEFT = "marginLeft";
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public static final String MARGIN_RIGHT = "marginRight";
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public static final String MARGIN_TOP = "marginTop";
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public static final String MARGIN_BOTTOM = "marginBottom";
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public static final String PADDING = "padding";
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public static final String PADDING_VERTICAL = "paddingVertical";
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public static final String PADDING_HORIZONTAL = "paddingHorizontal";
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public static final String PADDING_LEFT = "paddingLeft";
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public static final String PADDING_RIGHT = "paddingRight";
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public static final String PADDING_TOP = "paddingTop";
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public static final String PADDING_BOTTOM = "paddingBottom";
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public static final String POSITION = "position";
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public static final String RIGHT = "right";
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public static final String TOP = "top";
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public static final String WIDTH = "width";
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// Props that affect more than just layout
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public static final String ENABLED = "enabled";
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public static final String BACKGROUND_COLOR = "backgroundColor";
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public static final String COLOR = "color";
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public static final String FONT_SIZE = "fontSize";
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public static final String FONT_WEIGHT = "fontWeight";
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public static final String FONT_STYLE = "fontStyle";
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public static final String FONT_FAMILY = "fontFamily";
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public static final String LINE_HEIGHT = "lineHeight";
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public static final String NEEDS_OFFSCREEN_ALPHA_COMPOSITING = "needsOffscreenAlphaCompositing";
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public static final String NUMBER_OF_LINES = "numberOfLines";
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public static final String ON = "on";
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public static final String RESIZE_MODE = "resizeMode";
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public static final String TEXT_ALIGN = "textAlign";
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public static final String BORDER_WIDTH = "borderWidth";
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public static final String BORDER_LEFT_WIDTH = "borderLeftWidth";
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public static final String BORDER_TOP_WIDTH = "borderTopWidth";
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public static final String BORDER_RIGHT_WIDTH = "borderRightWidth";
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public static final String BORDER_BOTTOM_WIDTH = "borderBottomWidth";
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public static final int[] BORDER_SPACING_TYPES = {
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Spacing.ALL, Spacing.LEFT, Spacing.RIGHT, Spacing.TOP, Spacing.BOTTOM
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};
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public static final int[] PADDING_MARGIN_SPACING_TYPES = {
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Spacing.ALL, Spacing.VERTICAL, Spacing.HORIZONTAL, Spacing.LEFT, Spacing.RIGHT, Spacing.TOP,
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Spacing.BOTTOM
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};
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/*package*/ static final HashSet<String> LAYOUT_ONLY_PROPS = new HashSet<>(
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Arrays.asList(
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ALIGN_SELF,
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ALIGN_ITEMS,
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BOTTOM,
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COLLAPSABLE,
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FLEX,
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FLEX_DIRECTION,
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FLEX_WRAP,
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HEIGHT,
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JUSTIFY_CONTENT,
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LEFT,
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POSITION,
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RIGHT,
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TOP,
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WIDTH,
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/* margins */
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MARGIN,
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MARGIN_VERTICAL,
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MARGIN_HORIZONTAL,
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MARGIN_LEFT,
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MARGIN_RIGHT,
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MARGIN_TOP,
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MARGIN_BOTTOM,
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/* paddings */
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PADDING,
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PADDING_VERTICAL,
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PADDING_HORIZONTAL,
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PADDING_LEFT,
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PADDING_RIGHT,
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PADDING_TOP,
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PADDING_BOTTOM));
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public static boolean isLayoutOnly(String prop) {
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return LAYOUT_ONLY_PROPS.contains(prop);
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}
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}
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