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<?php
namespace Intervention\Image;
use Closure;
use Intervention\Image\Exception\InvalidArgumentException;
class Size
{
/**
* Width
*
* @var int
*/
public $width;
/**
* Height
*
* @var int
*/
public $height;
/**
* Pivot point
*
* @var Point
*/
public $pivot;
/**
* Creates a new Size instance
*
* @param int $width
* @param int $height
* @param Point $pivot
*/
public function __construct($width = null, $height = null, Point $pivot = null)
{
$this->width = is_numeric($width) ? intval($width) : 1;
$this->height = is_numeric($height) ? intval($height) : 1;
$this->pivot = $pivot ? $pivot : new Point;
}
/**
* Set the width and height absolutely
*
* @param int $width
* @param int $height
*/
public function set($width, $height)
{
$this->width = $width;
$this->height = $height;
}
/**
* Set current pivot point
*
* @param Point $point
*/
public function setPivot(Point $point)
{
$this->pivot = $point;
}
/**
* Get the current width
*
* @return int
*/
public function getWidth()
{
return $this->width;
}
/**
* Get the current height
*
* @return int
*/
public function getHeight()
{
return $this->height;
}
/**
* Calculate the current aspect ratio
*
* @return float
*/
public function getRatio()
{
return $this->width / $this->height;
}
/**
* Resize to desired width and/or height
*
* @param int $width
* @param int $height
* @param Closure $callback
* @return Size
*/
public function resize($width, $height, Closure $callback = null)
{
if (is_null($width) && is_null($height)) {
throw new InvalidArgumentException(
"Width or height needs to be defined."
);
}
// new size with dominant width
$dominant_w_size = clone $this;
$dominant_w_size->resizeHeight($height, $callback);
$dominant_w_size->resizeWidth($width, $callback);
// new size with dominant height
$dominant_h_size = clone $this;
$dominant_h_size->resizeWidth($width, $callback);
$dominant_h_size->resizeHeight($height, $callback);
// decide which size to use
if ($dominant_h_size->fitsInto(new self($width, $height))) {
$this->set($dominant_h_size->width, $dominant_h_size->height);
} else {
$this->set($dominant_w_size->width, $dominant_w_size->height);
}
return $this;
}
/**
* Scale size according to given constraints
*
* @param int $width
* @param Closure $callback
* @return Size
*/
private function resizeWidth($width, Closure $callback = null)
{
$constraint = $this->getConstraint($callback);
if ($constraint->isFixed(Constraint::UPSIZE)) {
$max_width = $constraint->getSize()->getWidth();
$max_height = $constraint->getSize()->getHeight();
}
if (is_numeric($width)) {
if ($constraint->isFixed(Constraint::UPSIZE)) {
$this->width = ($width > $max_width) ? $max_width : $width;
} else {
$this->width = $width;
}
if ($constraint->isFixed(Constraint::ASPECTRATIO)) {
$h = max(1, intval(round($this->width / $constraint->getSize()->getRatio())));
if ($constraint->isFixed(Constraint::UPSIZE)) {
$this->height = ($h > $max_height) ? $max_height : $h;
} else {
$this->height = $h;
}
}
}
}
/**
* Scale size according to given constraints
*
* @param int $height
* @param Closure $callback
* @return Size
*/
private function resizeHeight($height, Closure $callback = null)
{
$constraint = $this->getConstraint($callback);
if ($constraint->isFixed(Constraint::UPSIZE)) {
$max_width = $constraint->getSize()->getWidth();
$max_height = $constraint->getSize()->getHeight();
}
if (is_numeric($height)) {
if ($constraint->isFixed(Constraint::UPSIZE)) {
$this->height = ($height > $max_height) ? $max_height : $height;
} else {
$this->height = $height;
}
if ($constraint->isFixed(Constraint::ASPECTRATIO)) {
$w = max(1, intval(round($this->height * $constraint->getSize()->getRatio())));
if ($constraint->isFixed(Constraint::UPSIZE)) {
$this->width = ($w > $max_width) ? $max_width : $w;
} else {
$this->width = $w;
}
}
}
}
/**
* Calculate the relative position to another Size
* based on the pivot point settings of both sizes.
*
* @param Size $size
* @return \Intervention\Image\Point
*/
public function relativePosition(Size $size)
{
$x = $this->pivot->x - $size->pivot->x;
$y = $this->pivot->y - $size->pivot->y;
return new Point($x, $y);
}
/**
* Resize given Size to best fitting size of current size.
*
* @param Size $size
* @return \Intervention\Image\Size
*/
public function fit(Size $size, $position = 'center')
{
// create size with auto height
$auto_height = clone $size;
$auto_height->resize($this->width, null, function ($constraint) {
$constraint->aspectRatio();
});
// decide which version to use
if ($auto_height->fitsInto($this)) {
$size = $auto_height;
} else {
// create size with auto width
$auto_width = clone $size;
$auto_width->resize(null, $this->height, function ($constraint) {
$constraint->aspectRatio();
});
$size = $auto_width;
}
$this->align($position);
$size->align($position);
$size->setPivot($this->relativePosition($size));
return $size;
}
/**
* Checks if given size fits into current size
*
* @param Size $size
* @return boolean
*/
public function fitsInto(Size $size)
{
return ($this->width <= $size->width) && ($this->height <= $size->height);
}
/**
* Aligns current size's pivot point to given position
* and moves point automatically by offset.
*
* @param string $position
* @param int $offset_x
* @param int $offset_y
* @return \Intervention\Image\Size
*/
public function align($position, $offset_x = 0, $offset_y = 0)
{
switch (strtolower($position)) {
case 'top':
case 'top-center':
case 'top-middle':
case 'center-top':
case 'middle-top':
$x = intval($this->width / 2);
$y = 0 + $offset_y;
break;
case 'top-right':
case 'right-top':
$x = $this->width - $offset_x;
$y = 0 + $offset_y;
break;
case 'left':
case 'left-center':
case 'left-middle':
case 'center-left':
case 'middle-left':
$x = 0 + $offset_x;
$y = intval($this->height / 2);
break;
case 'right':
case 'right-center':
case 'right-middle':
case 'center-right':
case 'middle-right':
$x = $this->width - $offset_x;
$y = intval($this->height / 2);
break;
case 'bottom-left':
case 'left-bottom':
$x = 0 + $offset_x;
$y = $this->height - $offset_y;
break;
case 'bottom':
case 'bottom-center':
case 'bottom-middle':
case 'center-bottom':
case 'middle-bottom':
$x = intval($this->width / 2);
$y = $this->height - $offset_y;
break;
case 'bottom-right':
case 'right-bottom':
$x = $this->width - $offset_x;
$y = $this->height - $offset_y;
break;
case 'center':
case 'middle':
case 'center-center':
case 'middle-middle':
$x = intval($this->width / 2) + $offset_x;
$y = intval($this->height / 2) + $offset_y;
break;
default:
case 'top-left':
case 'left-top':
$x = 0 + $offset_x;
$y = 0 + $offset_y;
break;
}
$this->pivot->setPosition($x, $y);
return $this;
}
/**
* Runs constraints on current size
*
* @param Closure $callback
* @return \Intervention\Image\Constraint
*/
private function getConstraint(Closure $callback = null)
{
$constraint = new Constraint(clone $this);
if (is_callable($callback)) {
$callback($constraint);
}
return $constraint;
}
}