RelativeClientRect.java

// Copyright 2012 Google Inc. All Rights Reserved.
//
// 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.eclipse.che.ide.util;

import elemental.html.ClientRect;

/** A {@link ClientRect} which is relative to a given point. */
public class RelativeClientRect implements ClientRect {

    public static ClientRect relativeToRect(ClientRect relativeParent, ClientRect rect) {
        return new RelativeClientRect((int)relativeParent.getLeft(), (int)relativeParent.getTop(), rect);
    }

    private final ClientRect rect;

    private final int offsetLeft;

    private final int offsetTop;

    public RelativeClientRect(int offsetLeft, int offsetTop, ClientRect rect) {
        this.offsetLeft = offsetLeft;
        this.offsetTop = offsetTop;
        this.rect = rect;
    }

    @Override
    public float getBottom() {
        return rect.getBottom() - offsetTop;
    }

    @Override
    public float getHeight() {
        return rect.getHeight();
    }

    @Override
    public float getLeft() {
        return rect.getLeft() - offsetLeft;
    }

    @Override
    public float getRight() {
        return rect.getRight() - offsetLeft;
    }

    @Override
    public float getTop() {
        return rect.getTop() - offsetTop;
    }

    @Override
    public float getWidth() {
        return rect.getWidth();
    }
}