From e2b9c17ba3d4b7d9f2c1c97d45d47fea53ac3d61 Mon Sep 17 00:00:00 2001
From: Oliver Vogel <oliver@olivervogel.com>
Date: Wed, 3 Nov 2021 18:48:10 +0000
Subject: [PATCH] Added Size::align()

---
 src/Geometry/Size.php       | 87 +++++++++++++++++++++++++++++++++++++
 tests/Geometry/SizeTest.php | 45 +++++++++++++++++++
 2 files changed, 132 insertions(+)

diff --git a/src/Geometry/Size.php b/src/Geometry/Size.php
index 4f19bc30..b2e4f71f 100644
--- a/src/Geometry/Size.php
+++ b/src/Geometry/Size.php
@@ -89,4 +89,91 @@ class Size implements SizeInterface
     {
         return $this->getWidth() < $this->getHeight();
     }
+
+    /**
+     * 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 Size
+     */
+    public function align(string $position, int $offset_x = 0, int $offset_y = 0): self
+    {
+        switch (strtolower($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;
+    }
 }
diff --git a/tests/Geometry/SizeTest.php b/tests/Geometry/SizeTest.php
index e3e9c348..47090238 100644
--- a/tests/Geometry/SizeTest.php
+++ b/tests/Geometry/SizeTest.php
@@ -98,4 +98,49 @@ class SizeTest extends TestCase
         $box = new Size(200, 300);
         $this->assertTrue($box->isPortrait());
     }
+
+    public function testAlign(): void
+    {
+        $box = new Size(640, 480);
+        $this->assertEquals(0, $box->getPivot()->getX());
+        $this->assertEquals(0, $box->getPivot()->getY());
+
+        $box->align('top-left', 3, 3);
+        $this->assertEquals(3, $box->getPivot()->getX());
+        $this->assertEquals(3, $box->getPivot()->getY());
+
+        $box->align('top', 3, 3);
+        $this->assertEquals(320, $box->getPivot()->getX());
+        $this->assertEquals(3, $box->getPivot()->getY());
+
+        $box->align('top-right', 3, 3);
+        $this->assertEquals(637, $box->getPivot()->getX());
+        $this->assertEquals(3, $box->getPivot()->getY());
+
+        $box->align('left', 3, 3);
+        $this->assertEquals(3, $box->getPivot()->getX());
+        $this->assertEquals(240, $box->getPivot()->getY());
+
+        $box->align('center', 3, 3);
+        $this->assertEquals(323, $box->getPivot()->getX());
+        $this->assertEquals(243, $box->getPivot()->getY());
+
+        $box->align('right', 3, 3);
+        $this->assertEquals(637, $box->getPivot()->getX());
+        $this->assertEquals(240, $box->getPivot()->getY());
+
+        $box->align('bottom-left', 3, 3);
+        $this->assertEquals(3, $box->getPivot()->getX());
+        $this->assertEquals(477, $box->getPivot()->getY());
+
+        $box->align('bottom', 3, 3);
+        $this->assertEquals(320, $box->getPivot()->getX());
+        $this->assertEquals(477, $box->getPivot()->getY());
+
+        $result = $box->align('bottom-right', 3, 3);
+        $this->assertEquals(637, $box->getPivot()->getX());
+        $this->assertEquals(477, $box->getPivot()->getY());
+
+        $this->assertInstanceOf(Size::class, $result);
+    }
 }