feat(pty): add terminal_path property to pty

Property can be set to the NodePath of a Terminal node. Doing so will
conveniently set up the neccessary signals between Terminal and PTY for
them to function together.

addons/godot_xterm/native/src/pty.cpp

@@ -67,6 +67,10 @@ void PTY::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("is_using_threads"), &PTY::is_using_threads);
 	ClassDB::add_property("PTY", PropertyInfo(Variant::BOOL, "use_threads"), "set_use_threads", "is_using_threads");
 
+	ClassDB::bind_method(D_METHOD("set_terminal_path", "path"), &PTY::set_terminal_path);
+	ClassDB::bind_method(D_METHOD("get_terminal_path"), &PTY::get_terminal_path);
+	ClassDB::add_property("PTY", PropertyInfo(Variant::NODE_PATH, "terminal_path", PropertyHint::PROPERTY_HINT_NODE_PATH_VALID_TYPES, "Terminal"), "set_terminal_path", "get_terminal_path");
+
 	ClassDB::bind_method(D_METHOD("get_pts_name"), &PTY::get_pts_name);
 
 	ClassDB::bind_method(D_METHOD("fork", "file", "args", "cwd", "cols", "rows"), &PTY::fork, DEFVAL(""), DEFVAL(PackedStringArray()), DEFVAL("."), DEFVAL(80), DEFVAL(24));
@@ -145,6 +149,36 @@ bool PTY::is_using_threads() const {
     return use_threads;
 }
 
+void PTY::set_terminal_path(NodePath p_terminal_path) {
+    terminal_path = p_terminal_path;
+
+    Callable write = Callable(this, "write");
+    Callable resizev = Callable(this, "resizev");
+
+    // Disconnect the current terminal, if any.
+    if (terminal != nullptr) {
+        disconnect("data_received", Callable(terminal, "write"));
+        terminal->disconnect("data_sent", write);
+        terminal->disconnect("size_changed", resizev);
+    }
+
+    terminal = Object::cast_to<Terminal>(get_node_or_null(terminal_path));
+    if (terminal == nullptr) return;
+
+    // Connect the new terminal.
+    resize(terminal->get_cols(), terminal->get_rows());
+    if (!terminal->is_connected("size_changed", resizev))
+        terminal->connect("size_changed", resizev, CONNECT_PERSIST);
+    if (!terminal->is_connected("data_sent", write))
+        terminal->connect("data_sent", write, CONNECT_PERSIST);
+    if (!is_connected("data_received", Callable(terminal, "write")))
+        connect("data_received", Callable(terminal, "write"), CONNECT_PERSIST);
+}
+
+NodePath PTY::get_terminal_path() const {
+    return terminal_path;
+}
+
 String PTY::get_pts_name() const {
     return pts_name;
 }
@@ -213,8 +247,6 @@ void PTY::resize(const int p_cols, const int p_rows) {
     #if defined(__linux__) || defined(__APPLE__)
     if (fd > -1) {
         PTYUnix::resize(fd, cols, rows);
-    } else {
-        ERR_PRINT("fd <= -1");
     }
     #endif
 }
@@ -304,8 +336,10 @@ void PTY::_close() {
         uv_close((uv_handle_t *)&async_handle, _close_cb);
     }
     
+    if (status == STATUS_OPEN) {
         uv_run(&loop, UV_RUN_NOWAIT);
         uv_loop_close(&loop);
+    }
 
     if (fd > 0) close(fd);
     if (pid > 0) kill(SIGNAL_SIGHUP);

addons/godot_xterm/native/src/pty.h

@@ -3,6 +3,8 @@
 
 #pragma once
 
+#include "terminal.h"
+
 #include <godot_cpp/classes/mutex.hpp>
 #include <godot_cpp/classes/node.hpp>
 #include <godot_cpp/classes/os.hpp>
@@ -57,6 +59,9 @@ namespace godot
     void set_use_threads(bool p_use);
     bool is_using_threads() const;
 
+    void set_terminal_path(NodePath p_terminal_path);
+    NodePath get_terminal_path() const;
+
     String get_pts_name() const;
 
     Error fork(const String &file = "", const PackedStringArray &args = PackedStringArray(), const String &cwd = ".", const int cols = 80, const int rows = 24);
@@ -83,6 +88,9 @@ namespace godot
 
     String pts_name = "";
 
+    NodePath terminal_path;
+    Terminal *terminal = nullptr;
+
     String _get_fork_file(const String &file) const;
     Dictionary _get_fork_env() const;
     PackedStringArray _parse_env(const Dictionary &env) const;

test/test_pty.gd

@@ -24,9 +24,8 @@ class TestInterface:
 	func test_has_property_rows() -> void:
 		assert_has_property_with_default_value("rows", 24)
 
-	# TODO: Implement terminal_path property.
-	func xtest_has_property_terminal_path() -> void:
-		assert_has_property("terminal_path")
+	func test_has_property_terminal_path() -> void:
+		assert_has_property_with_default_value("terminal_path", NodePath())
 
 	func test_has_proprty_use_os_env() -> void:
 		assert_has_property_with_default_value("use_os_env", true)
@@ -82,3 +81,27 @@ class TestInterface:
 
 	func test_has_no_visible_children():
 		assert_eq(subject.get_child_count(), 0)
+
+
+class TestSetTerminalPath:
+	extends PTYTest
+
+	var terminal: Terminal
+
+	func before_each():
+		super.before_each()
+		terminal = Terminal.new()
+		add_child_autofree(terminal)
+		subject.terminal_path = terminal.get_path()
+
+	func test_terminal_path_is_set():
+		assert_eq(subject.terminal_path, terminal.get_path())
+
+	func test_data_sent_is_connected():
+		assert_connected(terminal, subject, "data_sent", "write")
+
+	func test_size_changed_is_connected():
+		assert_connected(terminal, subject, "size_changed", "resizev")
+
+	func test_data_received_is_connected():
+		assert_connected(subject, terminal, "data_received", "write")