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/**
* Copyright 2023 JogAmp Community. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are
* permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this list of
* conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice, this list
* of conditions and the following disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* The views and conclusions contained in the software and documentation are those of the
* authors and should not be interpreted as representing official policies, either expressed
* or implied, of JogAmp Community.
*/
package com.jogamp.graph.ui.layout;
import com.jogamp.opengl.math.FloatUtil;
/**
* GraphUI CSS property Margin, space between or around elements and not included in the element's size.
*
* The CSS margin properties are used to create space around elements, outside of any defined borders.
*
* {@link Margin#CENTER} is mapped to `zero` while earmarking {@link #isCenteredHoriz()} and {@link #isCenteredVert()}.
* The container must be sized via its layout horizontally and/or vertically matching the centered axis, similar to CSS.
*/
public class Margin {
/** Auto margin value to horizontally and/or vertically center an element within its sized-layout container, value if {@link Float#NaN}. */
public static final float CENTER = Float.NaN;
/** Top value */
public final float top;
/** Right value */
public final float right;
/** Bottom value */
public final float bottom;
/** Left value */
public final float left;
private final int bits;
static private final int CENTER_HORIZ = 1 << 0;
static private final int CENTER_VERT = 1 << 1;
static private int getBits(final float top, final float right, final float bottom, final float left) {
int b = 0;
if( FloatUtil.isEqual(CENTER, left) && FloatUtil.isEqual(CENTER, right) ) {
b |= CENTER_HORIZ;
}
if( FloatUtil.isEqual(CENTER, top) && FloatUtil.isEqual(CENTER, bottom) ) {
b |= CENTER_VERT;
}
return b;
}
/**
* Ctor w/ zero values
*/
public Margin() {
this(0f);
}
/**
* Ctor
* @param top top value
* @param right right value
* @param bottom bottom value
* @param left left value
*/
public Margin(final float top, final float right, final float bottom, final float left) {
this.bits = getBits(top, right, bottom, left);
if( isCenteredVert() ) {
this.top = 0;
this.bottom = 0;
} else {
this.top = top;
this.bottom = bottom;
}
if( isCenteredHoriz() ) {
this.right = 0;
this.left = 0;
} else {
this.right = right;
this.left = left;
}
}
/**
* Ctor
* @param top top value
* @param rl right and left value, use {@link #CENTER} to horizontally center the element in its container
* @param bottom bottom value
*/
public Margin(final float top, final float rl, final float bottom) {
this.bits = getBits(top, rl, bottom, rl);
if( isCenteredVert() ) {
this.top = 0;
this.bottom = 0;
} else {
this.top = top;
this.bottom = bottom;
}
if( isCenteredHoriz() ) {
this.right = 0;
this.left = 0;
} else {
this.right = rl;
this.left = rl;
}
}
/**
* Ctor
* @param tb top and bottom value, use {@link #CENTER} to vertically center the element in its container
* @param rl right and left value, use {@link #CENTER} to horizontally center the element in its container
*/
public Margin(final float tb, final float rl) {
this.bits = getBits(tb, rl, tb, rl);
if( isCenteredVert() ) {
this.top = 0;
this.bottom = 0;
} else {
this.top = tb;
this.bottom = tb;
}
if( isCenteredHoriz() ) {
this.right = 0;
this.left = 0;
} else {
this.right = rl;
this.left = rl;
}
}
/**
* Ctor
* @param trbl top, right, bottom and left value, use {@link #CENTER} to horizontally and vertically center the element in its container.
*/
public Margin(final float trbl) {
this.bits = getBits(trbl, trbl, trbl, trbl);
if( isCenteredVert() ) {
this.top = 0;
this.bottom = 0;
} else {
this.top = trbl;
this.bottom = trbl;
}
if( isCenteredHoriz() ) {
this.right = 0;
this.left = 0;
} else {
this.right = trbl;
this.left = trbl;
}
}
/** Returns true if {@link #left} and {@link #right} is {@link #CENTER}. */
public boolean isCenteredHoriz() {
return 0 != ( CENTER_HORIZ & bits );
}
/** Returns true if {@link #top} and {@link #bottom} is {@link #CENTER}. */
public boolean isCenteredVert() {
return 0 != ( CENTER_VERT & bits );
}
/** Returns true if {@link #isCenteredHoriz()} and {@link #isCenteredVert()} is true, i.e. for horizontal and vertical center. */
public boolean isCentered() {
return 0 != ( ( CENTER_VERT | CENTER_HORIZ ) & bits );
}
/** Return width of horizontal values top + right. Zero if {@link #isCenteredHoriz()}. */
public float width() { return left + right; }
/** Return height of vertical values bottom + top. Zero if {@link #isCenteredVert()}. */
public float height() { return bottom + top; }
public boolean zeroSumWidth() { return FloatUtil.isZero( width() ); };
public boolean zeroSumHeight() { return FloatUtil.isZero( height() ); };
public boolean zeroSumSize() { return zeroSumWidth() && zeroSumHeight(); }
@Override
public String toString() { return "Margin[t "+top+", r "+right+", b "+bottom+", l "+left+", ctr[h "+isCenteredHoriz()+", v "+isCenteredVert()+"]]"; }
}
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