Move terminal handling to its own class

src/Editor.php

@@ -46,7 +46,7 @@ class Editor {
 	{
 		$this->statusMsgTime = time();
 
-		[$this->screenRows, $this->screenCols] = get_window_size();
+		[$this->screenRows, $this->screenCols] = Terminal::getWindowSize();
 
 		// Remove a row for the status bar, and one for the message bar
 		$this->screenRows -= 2;
@@ -86,7 +86,7 @@ class Editor {
 	// ------------------------------------------------------------------------
 	protected function readKey(): string
 	{
-		$c = read_stdin();
+		$c = Terminal::read();
 
 		return match($c)
 		{
@@ -673,6 +673,8 @@ class Editor {
 
 	public function refreshScreen(): void
 	{
+		Terminal::clear();
+
 		$this->scroll();
 
 		$this->outputBuffer = '';
@@ -692,7 +694,7 @@ class Editor {
 
 		$this->outputBuffer .= ANSI::SHOW_CURSOR;
 
-		write_stdout($this->outputBuffer, strlen($this->outputBuffer));
+		Terminal::write($this->outputBuffer, strlen($this->outputBuffer));
 	}
 
 	public function setStatusMessage(string $fmt, mixed ...$args): void
@@ -758,7 +760,7 @@ class Editor {
 				{
 					$this->cursorX--;
 				}
-				else if ($this->cursorX > 0)
+				else if ($this->cursorY > 0)
 				{
 					$this->cursorY--;
 					$this->cursorX = $this->rows[$this->cursorY]->size;
@@ -827,8 +829,8 @@ class Editor {
 					$quit_times--;
 					return '';
 				}
-				write_stdout(ANSI::CLEAR_SCREEN);
-				write_stdout(ANSI::RESET_CURSOR);
+				Terminal::clear();
+
 				return NULL;
 			break;
 

src/Terminal.php

@@ -0,0 +1,105 @@
+<?php declare(strict_types=1);
+
+namespace Aviat\Kilo;
+
+class Terminal {
+	/**
+	 * Get the size of the current terminal window
+	 *
+	 * @codeCoverageIgnore
+	 * @return array
+	 */
+	public static function getWindowSize(): array
+	{
+		$ffiSize = Termios::getWindowSize();
+		if ($ffiSize !== NULL)
+		{
+			return $ffiSize;
+		}
+
+		// Try using tput
+		if (self::has_tput())
+		{
+			$rows = (int)trim((string)shell_exec('tput lines'));
+			$cols = (int)trim((string)shell_exec('tput cols'));
+
+			if ($rows > 0 && $cols > 0)
+			{
+				return [$rows, $cols];
+			}
+		}
+
+		// Worst-case, return an arbitrary 'standard' size
+		return [25, 80];
+	}
+
+	public static function clear(): void
+	{
+		self::write(ANSI::CLEAR_SCREEN . ANSI::RESET_CURSOR);
+	}
+
+	/**
+	 * Pull input from the stdin stream.
+	 *
+	 * @codeCoverageIgnore
+	 * @param int $len
+	 * @return string
+	 */
+	public static function read(int $len = 128): string
+	{
+		$handle = fopen('php://stdin', 'rb');
+		if ($handle === false)
+		{
+			return '';
+		}
+
+		$input = fread($handle, $len);
+		fclose($handle);
+
+		return (is_string($input)) ? $input : '';
+	}
+
+	/**
+	 * Write to the stdout stream
+	 *
+	 * @codeCoverageIgnore
+	 * @param string $str
+	 * @param int|NULL $len
+	 * @return int|false
+	 */
+	public static function write(string $str, int $len = NULL): int|false
+	{
+		$handle = fopen('php://stdout', 'ab');
+		if ($handle === false)
+		{
+			return false;
+		}
+
+		$res = (is_int($len))
+			? fwrite($handle, $str, $len)
+			: fwrite($handle, $str);
+
+		fflush($handle);
+
+		fclose($handle);
+
+		return $res;
+	}
+
+	/**
+	 * See if tput exists for fallback terminal size detection
+	 *
+	 * @return bool
+	 * @codeCoverageIgnore
+	 */
+	private static function has_tput(): bool
+	{
+		$cmd = shell_exec('type tput');
+		if ( ! is_string($cmd))
+		{
+			return FALSE;
+		}
+
+		return str_contains($cmd, ' is ');
+	}
+}

src/Termios.php

@@ -15,7 +15,7 @@ class Termios {
 
 	private function __construct()
 	{
-		$ffi = get_ffi();
+		$ffi = self::ffi();
 		$termios = $ffi->new('struct termios');
 		if ($termios === NULL)
 		{
@@ -67,7 +67,8 @@ class Termios {
 		$termios->c_cc[C::VTIME] = 1;
 
 		// Turn on raw mode
-		$res = get_ffi()->tcsetattr(C::STDIN_FILENO, C::TCSAFLUSH, FFI::addr($termios));
+		$res = self::ffi()
+			->tcsetattr(C::STDIN_FILENO, C::TCSAFLUSH, FFI::addr($termios));
 
 		return $res !== -1;
 	}
@@ -85,15 +86,37 @@ class Termios {
 		$instance = self::getInstance();
 
 		// Cleanup
-		write_stdout(ANSI::CLEAR_SCREEN);
-		write_stdout(ANSI::RESET_CURSOR);
-		write_stdout("\n"); // New line, please
+		Terminal::clear();
+		Terminal::write("\n"); // New line, please
 
-		$res = get_ffi()->tcsetattr(C::STDIN_FILENO, C::TCSAFLUSH, FFI::addr($instance->originalTermios));
+		$res = self::ffi()->tcsetattr(C::STDIN_FILENO, C::TCSAFLUSH, FFI::addr($instance->originalTermios));
 
 		return $res !== -1;
 	}
 
+	/**
+	 * Get the size of the current terminal window
+	 *
+	 * @codeCoverageIgnore
+	 * @return array|null
+	 */
+	public static function getWindowSize(): ?array
+	{
+		// First, try to get the answer from ioctl
+		$ffi = self::ffi();
+		$ws = $ffi->new('struct winsize');
+		if ($ws !== NULL)
+		{
+			$res = $ffi->ioctl(C::STDOUT_FILENO, C::TIOCGWINSZ, FFI::addr($ws));
+			if ($res === 0 && $ws->ws_col !== 0 && $ws->ws_row !== 0)
+			{
+				return [$ws->ws_row, $ws->ws_col];
+			}
+		}
+
+		return null;
+	}
+
 	private static function getInstance(): self
 	{
 		static $instance;
@@ -105,4 +128,21 @@ class Termios {
 
 		return $instance;
 	}
+
+	/**
+	 * A 'singleton' function to replace a global variable
+	 *
+	 * @return FFI
+	 */
+	private static function ffi(): FFI
+	{
+		static $ffi;
+
+		if ($ffi === NULL)
+		{
+			$ffi = FFI::load(__DIR__ . '/ffi.h');
+		}
+
+		return $ffi;
+	}
 }

src/functions.php

@@ -2,66 +2,7 @@
 
 namespace Aviat\Kilo;
 
-use FFI;
-
-use Aviat\Kilo\Enum\{C, Color, Highlight, KeyCode};
-
-/**
- * See if tput exists for fallback terminal size detection
- *
- * @return bool
- * @codeCoverageIgnore
- */
-function has_tput(): bool
-{
-	$cmd = shell_exec('type tput');
-	if ( ! is_string($cmd))
-	{
-		return FALSE;
-	}
-
-	return str_contains($cmd, ' is ');
-}
-
-// ----------------------------------------------------------------------------
-// ! Terminal size
-// ----------------------------------------------------------------------------
-
-/**
- * Get the size of the current terminal window
- *
- * @codeCoverageIgnore
- * @return array
- */
-function get_window_size(): array
-{
-	// First, try to get the answer from ioctl
-	$ffi = get_ffi();
-	$ws = $ffi->new('struct winsize');
-	if ($ws !== NULL)
-	{
-		$res = $ffi->ioctl(C::STDOUT_FILENO, C::TIOCGWINSZ, FFI::addr($ws));
-		if ($res === 0 && $ws->ws_col !== 0 && $ws->ws_row !== 0)
-		{
-			return [$ws->ws_row, $ws->ws_col];
-		}
-	}
-
-	// Try using tput
-	if (has_tput())
-	{
-		$rows = (int)trim(shell_exec('tput lines'));
-		$cols = (int)trim(shell_exec('tput cols'));
-
-		if ($rows > 0 && $cols > 0)
-		{
-			return [$rows, $cols];
-		}
-	}
-
-	// Worst-case, return an arbitrary 'standard' size
-	return [25, 80];
-}
+use Aviat\Kilo\Enum\{Color, Highlight, KeyCode};
 
 // ----------------------------------------------------------------------------
 // ! C function/macro equivalents
@@ -151,23 +92,6 @@ function is_space(string $char): bool
 // ! Helper functions
 // ----------------------------------------------------------------------------
 
-/**
- * A 'singleton' function to replace a global variable
- *
- * @return FFI
- */
-function get_ffi(): FFI
-{
-	static $ffi;
-
-	if ($ffi === NULL)
-	{
-		$ffi = FFI::load(__DIR__ . '/ffi.h');
-	}
-
-	return $ffi;
-}
-
 /**
  * Does the one-character string contain a character that separates tokens?
  *
@@ -186,52 +110,6 @@ function is_separator(string $char): bool
 	return is_space($char) || $char === KeyCode::NULL || $isSep;
 }
 
-/**
- * Pull input from the stdin stream.
- *
- * @codeCoverageIgnore
- * @param int $len
- * @return string
- */
-function read_stdin(int $len = 128): string
-{
-	$handle = fopen('php://stdin', 'rb');
-	if ($handle === false)
-	{
-		return '';
-	}
-
-	$input = fread($handle, $len);
-	fclose($handle);
-
-	return (is_string($input)) ? $input : '';
-}
-
-/**
- * Write to the stdout stream
- *
- * @codeCoverageIgnore
- * @param string $str
- * @param int|NULL $len
- * @return int|false
- */
-function write_stdout(string $str, int $len = NULL): int|false
-{
-	$handle = fopen('php://stdout', 'ab');
-	if ($handle === false)
-	{
-		return false;
-	}
-
-	$res = (is_int($len))
-		? fwrite($handle, $str, $len)
-		: fwrite($handle, $str);
-
-	fclose($handle);
-
-	return $res;
-}
-
 /**
  * Replaces a slice of an array with the same value
  *

tests/FunctionTest.php

@@ -9,7 +9,6 @@ use PHPUnit\Framework\TestCase;
 use function Aviat\Kilo\array_replace_range;
 use function Aviat\Kilo\ctrl_key;
 use function Aviat\Kilo\get_file_syntax_map;
-use function Aviat\Kilo\get_window_size;
 use function Aviat\Kilo\is_ascii;
 use function Aviat\Kilo\is_ctrl;
 use function Aviat\Kilo\is_digit;
@@ -20,12 +19,7 @@ use function Aviat\Kilo\syntax_to_color;
 use function Aviat\Kilo\tabs_to_spaces;
 
 class FunctionTest extends TestCase {
-	public function test_get_window_size(): void
-	{
-		[$rows, $cols] = get_window_size();
-		$this->assertGreaterThan(0, $rows);
-		$this->assertGreaterThan(0, $cols);
-	}
+
 
 	public function test_is_ascii(): void
 	{

tests/TerminalTest.php

@@ -0,0 +1,17 @@
+<?php declare(strict_types=1);
+
+namespace Aviat\Kilo\Tests;
+
+use PHPUnit\Framework\TestCase;
+
+use Aviat\Kilo\Terminal;
+
+
+class TerminalTest extends TestCase {
+	public function test_getWindowSize(): void
+	{
+		[$rows, $cols] = Terminal::getWindowSize();
+		$this->assertGreaterThan(0, $rows);
+		$this->assertGreaterThan(0, $cols);
+	}
+}