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133 lines
3.5 KiB
V
133 lines
3.5 KiB
V
// Copyright (c) 2019-2023 Alexander Medvednikov. All rights reserved.
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// Use of this source code is governed by an MIT license
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// that can be found in the LICENSE file.
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module term
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// Sources for ANSI Control Sequences
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// https://github.com/RajeshPatkarInstitute/Panim
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// https://www.gnu.org/software/screen/manual/html_node/Control-Sequences.html
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// https://en.wikipedia.org/wiki/ANSI_escape_code
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// Support for Windows
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// https://en.wikipedia.org/wiki/ANSI.SYS
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// #include <windows.h>
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// C.SetConsoleMode(C.ENABLE_VIRTUAL_TERMINAL_INPUT)
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// Setting cursor to the given position
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// x is the x coordinate
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// y is the y coordinate
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pub fn set_cursor_position(c Coord) {
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print('\x1b[${c.y};${c.x}' + 'H')
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flush_stdout()
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}
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// n is number of cells
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// direction: A is up / North
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// direction: B is down / South
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// direction: C is forward / East
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// direction: D is backward / West
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pub fn move(n int, direction string) {
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print('\x1b[${n}${direction}')
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flush_stdout()
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}
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// cursor_up moves the cursor up `n` lines.
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pub fn cursor_up(n int) {
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move(n, 'A')
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}
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// cursor_down moves the cursor down `n` lines.
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pub fn cursor_down(n int) {
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move(n, 'B')
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}
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// cursor_forward moves the cursor forward `n` character positions.
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pub fn cursor_forward(n int) {
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move(n, 'C')
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}
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// cursor_back moves the cursor back `n` characters.
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pub fn cursor_back(n int) {
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move(n, 'D')
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}
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// erase_display erases display characters based on the given parameter, `t`.
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// `t` can be of the following values in string:
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// `0`: current cursor position to end of the terminal window.
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// `1`: current cursor position to beginning of the terminal
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// window.
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// `2`: clears the entire terminal window.
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// `3`: clears the entire terminal window and also deletes the scrollback buffer.
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pub fn erase_display(t string) {
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print('\x1b[' + t + 'J')
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flush_stdout()
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}
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// erase_to_end erases from the cursor to the end of the terminal window.
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pub fn erase_toend() {
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erase_display('0')
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}
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// erase_tobeg erases from the cursor to the beginning of the terminal window.
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pub fn erase_tobeg() {
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erase_display('1')
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}
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// erase_clear clears the entire terminal window and returns the cursor to the
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// top left corner.
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pub fn erase_clear() {
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print('\033[H\033[J')
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flush_stdout()
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}
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// erase_del_clear erases saved lines.
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pub fn erase_del_clear() {
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erase_display('3')
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}
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// erase_line erases the current line based on the given parameter, `t`.
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// `t` can be of the following values in string:
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// `0`: current cursor position to the end of the line.
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// `1`: current cursor position to the beginning of the line.
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// `2`: clears the entire line.
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// Note: Cursor position does not change.
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pub fn erase_line(t string) {
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print('\x1b[' + t + 'K')
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flush_stdout()
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}
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// erase_line_toend erases from the cursor position to the end of the line.
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pub fn erase_line_toend() {
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erase_line('0')
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}
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// erase_line_tobeg erases from the start of the line to the cursor
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// position.
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pub fn erase_line_tobeg() {
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erase_line('1')
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}
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// erase_line_clear erases the entire line.
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pub fn erase_line_clear() {
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erase_line('2')
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}
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// show_cursor makes the cursor appear if it was not visible.
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pub fn show_cursor() {
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print('\x1b[?25h')
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flush_stdout()
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}
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// Will make cursor invisible
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pub fn hide_cursor() {
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print('\x1b[?25l')
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flush_stdout()
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}
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// clear_previous_line - useful for progressbars.
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// It moves the cursor to start of line, then 1 line above,
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// then erases the line. In effect the next println will overwrite
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// the previous content.
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pub fn clear_previous_line() {
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print('\r\x1b[1A\x1b[2K')
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flush_stdout()
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}
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