ModalHostShadowNode.java

/**
 * 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.views.modal;

import android.graphics.Point;

import com.facebook.react.uimanager.LayoutShadowNode;
import com.facebook.react.uimanager.ReactShadowNode;

/**
 * We implement the Modal by using an Android Dialog. That will fill the entire window of the
 * application.  To get layout to work properly, we need to layout all the elements within the
 * Modal's inner content view as if they can fill the entire window.  To do that, we need to
 * explicitly set the styleWidth and styleHeight on the LayoutShadowNode of the child of this node
 * to be the window size.  This will then cause the children of the Modal to layout as if they can
 * fill the window.
 */
class ModalHostShadowNode extends LayoutShadowNode {

  /**
   * We need to set the styleWidth and styleHeight of the one child (represented by the <View/>
   * within the <RCTModalHostView/> in Modal.js.  This needs to fill the entire window.
   */
  @Override
  public void addChildAt(ReactShadowNode child, int i) {
    super.addChildAt(child, i);
    Point modalSize = ModalHostHelper.getModalHostSize(getThemedContext());
    child.setStyleWidth(modalSize.x);
    child.setStyleHeight(modalSize.y);
  }
}