Adds most of the toolsHEADmaster

1 files changed, 125 insertions, 0 deletions

diff --git a/v_windows/v/vlib/term/term_windows.c.v b/v_windows/v/vlib/term/term_windows.c.v
new file mode 100644
index 0000000..1d2f032
--- /dev/null
+++ b/v_windows/v/vlib/term/term_windows.c.v
@@ -0,0 +1,125 @@
+module term
+
+import os
+
+[typedef]
+struct C.COORD {
+mut:
+	X i16
+	Y i16
+}
+
+[typedef]
+struct C.SMALL_RECT {
+mut:
+	Left   u16
+	Top    u16
+	Right  u16
+	Bottom u16
+}
+
+// win: CONSOLE_SCREEN_BUFFER_INFO
+// https://docs.microsoft.com/en-us/windows/console/console-screen-buffer-info-str
+[typedef]
+struct C.CONSOLE_SCREEN_BUFFER_INFO {
+mut:
+	dwSize              C.COORD
+	dwCursorPosition    C.COORD
+	wAttributes         u16
+	srWindow            C.SMALL_RECT
+	dwMaximumWindowSize C.COORD
+}
+
+union C.uChar {
+mut:
+	UnicodeChar rune
+	AsciiChar   byte
+}
+
+[typedef]
+struct C.CHAR_INFO {
+mut:
+	Char       C.uChar
+	Attributes u16
+}
+
+// ref - https://docs.microsoft.com/en-us/windows/console/getconsolescreenbufferinfo
+fn C.GetConsoleScreenBufferInfo(handle C.HANDLE, info &C.CONSOLE_SCREEN_BUFFER_INFO) bool
+
+// ref - https://docs.microsoft.com/en-us/windows/console/setconsoletitle
+fn C.SetConsoleTitle(title &u16) bool
+
+// ref - https://docs.microsoft.com/en-us/windows/console/setconsolecursorposition
+fn C.SetConsoleCursorPosition(handle C.HANDLE, coord C.COORD) bool
+
+// ref - https://docs.microsoft.com/en-us/windows/console/scrollconsolescreenbuffer
+fn C.ScrollConsoleScreenBuffer(output C.HANDLE, scroll_rect &C.SMALL_RECT, clip_rect &C.SMALL_RECT, des C.COORD, fill &C.CHAR_INFO) bool
+
+// get_terminal_size returns a number of colums and rows of terminal window.
+pub fn get_terminal_size() (int, int) {
+	if os.is_atty(1) > 0 && os.getenv('TERM') != 'dumb' {
+		info := C.CONSOLE_SCREEN_BUFFER_INFO{}
+		if C.GetConsoleScreenBufferInfo(C.GetStdHandle(C.STD_OUTPUT_HANDLE), &info) {
+			columns := int(info.srWindow.Right - info.srWindow.Left + 1)
+			rows := int(info.srWindow.Bottom - info.srWindow.Top + 1)
+			return columns, rows
+		}
+	}
+	return default_columns_size, default_rows_size
+}
+
+// get_cursor_position returns a Coord containing the current cursor position
+pub fn get_cursor_position() Coord {
+	mut res := Coord{}
+	if os.is_atty(1) > 0 && os.getenv('TERM') != 'dumb' {
+		info := C.CONSOLE_SCREEN_BUFFER_INFO{}
+		if C.GetConsoleScreenBufferInfo(C.GetStdHandle(C.STD_OUTPUT_HANDLE), &info) {
+			res.x = info.dwCursorPosition.X
+			res.y = info.dwCursorPosition.Y
+		}
+	}
+	return res
+}
+
+// set_terminal_title change the terminal title
+pub fn set_terminal_title(title string) bool {
+	title_change := C.SetConsoleTitle(title.to_wide())
+	return title_change
+}
+
+// clear clears current terminal screen.
+// Implementation taken from https://docs.microsoft.com/en-us/windows/console/clearing-the-screen#example-2.
+pub fn clear() {
+	hconsole := C.GetStdHandle(C.STD_OUTPUT_HANDLE)
+	mut csbi := C.CONSOLE_SCREEN_BUFFER_INFO{}
+	mut scrollrect := C.SMALL_RECT{}
+	mut scrolltarget := C.COORD{}
+	mut fill := C.CHAR_INFO{}
+
+	// Get the number of character cells in the current buffer.
+	if !C.GetConsoleScreenBufferInfo(hconsole, &csbi) {
+		return
+	}
+	// Scroll the rectangle of the entire buffer.
+	scrollrect.Left = 0
+	scrollrect.Top = 0
+	scrollrect.Right = u16(csbi.dwSize.X)
+	scrollrect.Bottom = u16(csbi.dwSize.Y)
+
+	// Scroll it upwards off the top of the buffer with a magnitude of the entire height.
+	scrolltarget.X = 0
+	scrolltarget.Y = (0 - csbi.dwSize.Y)
+
+	// Fill with empty spaces with the buffer's default text attribute.
+	fill.Char.UnicodeChar = rune(` `)
+	fill.Attributes = csbi.wAttributes
+
+	// Do the scroll
+	C.ScrollConsoleScreenBuffer(hconsole, &scrollrect, C.NULL, scrolltarget, &fill)
+
+	// Move the cursor to the top left corner too.
+	csbi.dwCursorPosition.X = 0
+	csbi.dwCursorPosition.Y = 0
+
+	C.SetConsoleCursorPosition(hconsole, csbi.dwCursorPosition)
+}