/**
* Copyright 2010 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package org.waveprotocol.wave.client.widget.popup;
import com.google.gwt.user.client.Window;
/**
* Utility class to bound a popup's co-ordinates so that they fit within the window.
*
*/
public class PositionUtil {
private static int SCREEN_EDGE_PADDING_PIXELS = 16;
/**
* Restrict a popup's position to stay within the screen horizontally.
*
* @param x The proposed x position of the popup.
* @param width The width of the popup.
* @return The s position at which the popup should appear.
*/
public static int boundToScreenHorizontal(int x, int width) {
return Math.min(Math.max(x, 0), Window.getClientWidth() - width - SCREEN_EDGE_PADDING_PIXELS);
}
/**
* Restrict a popup's position to stay within the screen vertically.
*
* @param y The proposed y position of the popup.
* @param height The height of the popup.
* @return The y position at which the popup should appear.
*/
public static int boundToScreenVertical(int y, int height) {
return Math.min(Math.max(y, 0), Window.getClientHeight() - height - SCREEN_EDGE_PADDING_PIXELS);
}
}