Created
July 18, 2024 21:56
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Функция для получения размера терминала. Я использую её для создания cli-ui
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| local ffi = require("ffi") | |
| local terminalSize | |
| if package.config:sub(1, 1) == "\\" then -- windows | |
| local kernel32 = ffi.load("kernel32") | |
| ffi.cdef([[ | |
| typedef struct _CONSOLE_SCREEN_BUFFER_INFO { | |
| uint16_t dwSizeX; | |
| uint16_t dwSizeY; | |
| uint16_t dwCursorPositionX; | |
| uint16_t dwCursorPositionY; | |
| uint16_t wAttributes; | |
| uint16_t srWindowLeft; | |
| uint16_t srWindowTop; | |
| uint16_t srWindowRight; | |
| uint16_t srWindowBottom; | |
| uint16_t dwMaximumWindowSizeX; | |
| uint16_t dwMaximumWindowSizeY; | |
| } CONSOLE_SCREEN_BUFFER_INFO; | |
| bool GetConsoleScreenBufferInfo(void* hConsoleOutput, CONSOLE_SCREEN_BUFFER_INFO* lpConsoleScreenBufferInfo); | |
| void* GetStdHandle(uint32_t nStdHandle); | |
| ]]) | |
| local STD_OUTPUT_HANDLE = -11 | |
| local hConsole = kernel32.GetStdHandle(STD_OUTPUT_HANDLE) | |
| local csbi = ffi.new("CONSOLE_SCREEN_BUFFER_INFO") | |
| function terminalSize() | |
| if kernel32.GetConsoleScreenBufferInfo(hConsole, csbi) then | |
| return csbi.dwSizeX, csbi.dwSizeY | |
| end | |
| return 80, 24 -- fallback | |
| end | |
| else -- linux | |
| ffi.cdef([[ | |
| typedef struct { | |
| unsigned short ws_row; | |
| unsigned short ws_col; | |
| unsigned short ws_xpixel; | |
| unsigned short ws_ypixel; | |
| } winsize; | |
| int ioctl(int fd, unsigned long request, ...); | |
| ]]) | |
| local TIOCGWINSZ = 0x5413 | |
| function terminalSize() | |
| local ws = ffi.new("winsize") | |
| ffi.C.ioctl(0, TIOCGWINSZ, ws) | |
| return ws.ws_col, ws.ws_row | |
| end | |
| end | |
| local lib = setmetatable({ | |
| test = function() | |
| local w, h = terminalSize() | |
| print("terminal size: ".. w ..", ".. h) | |
| local sleep = require("timer").sleep | |
| local delay = 2 / h * 1000 | |
| local base = "progress [%s] ETA: null | %s/".. h | |
| local max_wide = w - #base - 4 - 3 | |
| for y = 1, h do | |
| local wide = math.floor(y / h * max_wide) | |
| print(base:format(string.rep("=", wide) .. string.rep("-", max_wide - wide), y)) | |
| sleep(delay) | |
| end | |
| end | |
| }, {__call = terminalSize}) | |
| -- lib.test() | |
| return lib |
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