FEAT: implemented QUERY action on INPUT port to get information about console's size

Author: Oldes

src/boot/sysobj.r

@@ -254,6 +254,11 @@ standard: context [
 			none
 	]
 
+	console-info: context [
+		buffer-size: none
+		window-size: none
+	]
+
 	extension: context [
 		lib-base:	; handle to DLL
 		lib-file:	; file name loaded

src/core/p-console.c

@@ -128,6 +128,16 @@
 		if (IS_OPEN(req)) return R_TRUE;
 		return R_FALSE;
 
+	case A_QUERY:
+		if (OS_DO_DEVICE(req, RDC_QUERY) < 0) return R_NONE;
+		REBVAL *spec = Get_System(SYS_STANDARD, STD_CONSOLE_INFO);
+		if (!IS_OBJECT(spec)) Trap_Arg(spec);
+		REBSER *obj = CLONE_OBJECT(VAL_OBJ_FRAME(spec));
+		SET_OBJECT(D_RET, obj);
+		SET_PAIR(OFV(obj, STD_CONSOLE_INFO_BUFFER_SIZE), req->console.buffer_cols, req->console.buffer_rows);
+		SET_PAIR(OFV(obj, STD_CONSOLE_INFO_WINDOW_SIZE), req->console.window_cols, req->console.window_rows);
+		break;
+
 	default:
 		Trap_Action(REB_PORT, action);
 	}

src/include/reb-device.h

@@ -180,6 +180,12 @@ struct rebol_devreq {
 			u32  remote_port;		// remote port
 			void *host_info;		// for DNS usage
 		} net;
+		struct {
+			u32  buffer_rows;
+			u32  buffer_cols;
+			u32  window_rows;
+			u32  window_cols;
+		} console;
 	};
 };
 #pragma pack()

src/os/posix/dev-stdio.c

@@ -44,6 +44,7 @@
 #include <signal.h>
 #include <stdlib.h>
 #include <string.h>
+#include <sys/ioctl.h>
 
 #include "reb-host.h"
 
@@ -260,6 +261,21 @@ static void Close_Stdio(void)
 	return DR_DONE;
 }
 
+/***********************************************************************
+**
+*/	DEVICE_CMD Query_IO(REBREQ *req)
+/*
+**		Resolve port information. Currently just size of console.
+**
+***********************************************************************/
+{
+	struct winsize w;
+    ioctl(STDOUT_FILENO, TIOCGWINSZ, &w);
+	req->console.window_rows =
+	req->console.buffer_rows = w.ws_row;
+	req->console.window_cols = w.ws_col;
+	return DR_DONE;
+}
 
 /***********************************************************************
 **
@@ -302,7 +318,7 @@ static DEVICE_CMD_FUNC Dev_Cmds[RDC_MAX] =
 	Write_IO,
 	0,	// poll
 	0,	// connect
-	0,	// query
+	Query_IO,
 	0,	// modify
 	Open_Echo,	// CREATE used for opening echo file
 };

src/os/win32/dev-stdio.c

@@ -439,6 +439,22 @@ static void close_stdio(void)
 	return DR_DONE;
 }
 
+/***********************************************************************
+**
+*/	DEVICE_CMD Query_IO(REBREQ *req)
+/*
+**		Resolve console port information. Currently just size of console.
+**
+***********************************************************************/
+{
+	CONSOLE_SCREEN_BUFFER_INFO csbiInfo;
+	GetConsoleScreenBufferInfo(Std_Out, &csbiInfo);
+	req->console.buffer_rows = csbiInfo.dwSize.Y;
+	req->console.buffer_cols = csbiInfo.dwSize.X;
+	req->console.window_rows = csbiInfo.srWindow.Bottom - csbiInfo.srWindow.Top + 1;
+	req->console.window_cols = csbiInfo.srWindow.Right - csbiInfo.srWindow.Left + 1;
+	return DR_DONE;
+}
 
 /***********************************************************************
 **
@@ -482,7 +498,7 @@ static DEVICE_CMD_FUNC Dev_Cmds[RDC_MAX] =
 	Write_IO,
 	0,	// poll
 	0,	// connect
-	0,	// query
+	Query_IO,
 	0,	// modify
 	Open_Echo,	// CREATE used for opening echo file
 };