implement custom word wrap for text blocks

src/Abstract/Entity/Browser/Container/Page/Content/Markup.php

@@ -18,11 +18,7 @@ abstract class Markup
     // Dependencies
     public Content $content;
 
-    // Defaults
-    public const WRAP = 140;
-
     // Extras
-    protected int $_wrap = self::WRAP;
     protected ?string $_source = null;
 
     public function __construct(
@@ -113,11 +109,18 @@ abstract class Markup
         return false;
     }
 
-    // Require custom wordwrap implementation on widget resize
-    abstract protected function _onSizeAllocate(
+    // Custom wordwrap on widget resize
+    protected function _onSizeAllocate(
         GtkLabel $label,
         GdkEvent $event
-    ): bool;
+    ): bool
+    {
+        $this->set( // @TODO Gtk::timeout_add
+            $this->_source
+        );
+
+        return false;
+    }
 
     // Require custom layout implementation
     abstract public function set(
@@ -125,61 +128,6 @@ abstract class Markup
     ): void;
 
     // Tools
-    protected function _line(
-        int $offset
-    ): ?string
-    {
-        if (is_null($this->_source))
-        {
-            return null;
-        }
-
-        $start = strrpos(
-            substr(
-                $this->_source,
-                0,
-                $offset
-            ),
-            PHP_EOL
-        ) + 1;
-
-        $end = strpos(
-            $this->_source,
-            PHP_EOL,
-            $offset
-        );
-
-        if ($end === false)
-        {
-            $end = strlen(
-                $this->_source
-            );
-        }
-
-        return substr(
-            $this->_source,
-            $start,
-            $end - $start
-        );
-    }
-
-    protected function _wrap(
-        string $source
-    ): string
-    {
-        if ($wrap = $this->_wrap ? $this->_wrap : $this::WRAP)
-        {
-            return wordwrap(
-                $source,
-                $wrap,
-                PHP_EOL,
-                false
-            );
-        }
-
-        throw new Exception;
-    }
-
     protected function _url(
         string $link
     ): ?string

src/Abstract/Model/Gtk/Pango/Markup.php

@@ -4,6 +4,9 @@ declare(strict_types=1);
 
 namespace Yggverse\Yoda\Abstract\Model\Gtk\Pango;
 
+use \PangoLayout;
+use \GtkDrawingArea;
+
 class Markup implements \Yggverse\Yoda\Interface\Model\Gtk\Pango\Markup
 {
     public static function code(
@@ -99,11 +102,15 @@ class Markup implements \Yggverse\Yoda\Interface\Model\Gtk\Pango\Markup
     }
 
     public static function text(
-        string $value
+        string $value,
+        int $width = self::WRAP_WIDTH
     ): string
     {
         return htmlspecialchars(
-            $value
+            self::_wrap(
+                $value,
+                $width
+            )
         );
     }
 
@@ -131,4 +138,62 @@ class Markup implements \Yggverse\Yoda\Interface\Model\Gtk\Pango\Markup
 
         throw new Exception;
     }
+
+    public static function width(
+        string $markup
+    ): ?int
+    {
+        $layout = new PangoLayout(
+            (new GtkDrawingArea)->create_pango_context()
+        );
+
+        $layout->set_markup(
+            $markup,
+            mb_strlen(
+                $markup,
+                'UTF-8'
+            )
+        );
+
+        if ($size = $layout->get_pixel_size())
+        {
+            return $size['width'];
+        }
+
+        return null;
+    }
+
+    protected static function _wrap(
+        string $string,
+        int $width = self::WRAP_WIDTH,
+        int $line = 1
+    ): string
+    {
+        $words = [];
+
+        foreach (explode(' ', $string) as $word)
+        {
+            if (isset($words[$line]) && Markup::width(implode(' ', $words[$line])) > $width)
+            {
+                $line++;
+            }
+
+            $words[$line][] = $word;
+        }
+
+        $lines = [];
+
+        foreach ($words as $values)
+        {
+            $lines[] = implode(
+                ' ',
+                $values
+            );
+        }
+
+        return implode(
+            PHP_EOL,
+            $lines
+        );
+    }
 }

src/Entity/Browser/Container/Page/Content/Gemtext.php

@@ -180,7 +180,8 @@ class Gemtext extends \Yggverse\Yoda\Abstract\Entity\Browser\Container\Page\Cont
                     else
                     {
                         $line[] = Markup::text(
-                            $entity->getData()
+                            $entity->getData(),
+                            $this->content->page->gtk->get_allocated_width()
                         );
                     }
 

src/Interface/Model/Gtk/Pango/Markup.php

@@ -12,6 +12,8 @@ interface Markup
 {
     public const TAG_CODE = 'tt';
 
+    public const WRAP_WIDTH = 140;
+
     public static function code(
         string $value
     ): string;
@@ -54,4 +56,8 @@ interface Markup
         string $const,
         bool $close
     ): string;
+
+    public static function width(
+        string $markup
+    ): ?int;
 }