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/*
* Copyright 2000-2016 Vaadin Ltd.
*
* 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 com.vaadin.ui;
import java.io.Serializable;
import com.vaadin.shared.ui.AlignmentInfo.Bits;
/**
* Class containing information about alignment of a component. Use the
* pre-instantiated classes.
*/
@SuppressWarnings("serial")
public final class Alignment implements Serializable {
public static final Alignment TOP_RIGHT = new Alignment(
Bits.ALIGNMENT_TOP + Bits.ALIGNMENT_RIGHT);
public static final Alignment TOP_LEFT = new Alignment(
Bits.ALIGNMENT_TOP + Bits.ALIGNMENT_LEFT);
public static final Alignment TOP_CENTER = new Alignment(
Bits.ALIGNMENT_TOP + Bits.ALIGNMENT_HORIZONTAL_CENTER);
public static final Alignment MIDDLE_RIGHT = new Alignment(
Bits.ALIGNMENT_VERTICAL_CENTER + Bits.ALIGNMENT_RIGHT);
public static final Alignment MIDDLE_LEFT = new Alignment(
Bits.ALIGNMENT_VERTICAL_CENTER + Bits.ALIGNMENT_LEFT);
public static final Alignment MIDDLE_CENTER = new Alignment(
Bits.ALIGNMENT_VERTICAL_CENTER + Bits.ALIGNMENT_HORIZONTAL_CENTER);
public static final Alignment BOTTOM_RIGHT = new Alignment(
Bits.ALIGNMENT_BOTTOM + Bits.ALIGNMENT_RIGHT);
public static final Alignment BOTTOM_LEFT = new Alignment(
Bits.ALIGNMENT_BOTTOM + Bits.ALIGNMENT_LEFT);
public static final Alignment BOTTOM_CENTER = new Alignment(
Bits.ALIGNMENT_BOTTOM + Bits.ALIGNMENT_HORIZONTAL_CENTER);
private final int bitMask;
public Alignment(int bitMask) {
this.bitMask = bitMask;
}
/**
* Returns a bitmask representation of the alignment value. Used internally
* by terminal.
*
* @return the bitmask representation of the alignment value
*/
public int getBitMask() {
return bitMask;
}
/**
* Checks if component is aligned to the top of the available space.
*
* @return true if aligned top
*/
public boolean isTop() {
return (bitMask & Bits.ALIGNMENT_TOP) == Bits.ALIGNMENT_TOP;
}
/**
* Checks if component is aligned to the bottom of the available space.
*
* @return true if aligned bottom
*/
public boolean isBottom() {
return (bitMask & Bits.ALIGNMENT_BOTTOM) == Bits.ALIGNMENT_BOTTOM;
}
/**
* Checks if component is aligned to the left of the available space.
*
* @return true if aligned left
*/
public boolean isLeft() {
return (bitMask & Bits.ALIGNMENT_LEFT) == Bits.ALIGNMENT_LEFT;
}
/**
* Checks if component is aligned to the right of the available space.
*
* @return true if aligned right
*/
public boolean isRight() {
return (bitMask & Bits.ALIGNMENT_RIGHT) == Bits.ALIGNMENT_RIGHT;
}
/**
* Checks if component is aligned middle (vertically center) of the
* available space.
*
* @return true if aligned bottom
*/
public boolean isMiddle() {
return (bitMask
& Bits.ALIGNMENT_VERTICAL_CENTER) == Bits.ALIGNMENT_VERTICAL_CENTER;
}
/**
* Checks if component is aligned center (horizontally) of the available
* space.
*
* @return true if aligned center
*/
public boolean isCenter() {
return (bitMask
& Bits.ALIGNMENT_HORIZONTAL_CENTER) == Bits.ALIGNMENT_HORIZONTAL_CENTER;
}
/**
* Returns string representation of vertical alignment.
*
* @return vertical alignment as CSS value
*/
public String getVerticalAlignment() {
if (isBottom()) {
return "bottom";
} else if (isMiddle()) {
return "middle";
}
return "top";
}
/**
* Returns string representation of horizontal alignment.
*
* @return horizontal alignment as CSS value
*/
public String getHorizontalAlignment() {
if (isRight()) {
return "right";
} else if (isCenter()) {
return "center";
}
return "left";
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if ((obj == null) || (obj.getClass() != this.getClass())) {
return false;
}
Alignment a = (Alignment) obj;
return bitMask == a.bitMask;
}
@Override
public int hashCode() {
return bitMask;
}
@Override
public String toString() {
return String.valueOf(bitMask);
}
}
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