3 files changed, 96 insertions, 0 deletions
diff --git a/src/detection/terminalsize/terminalsize.h b/src/detection/terminalsize/terminalsize.h
new file mode 100644
index 0000000..1ad97e1
--- /dev/null
+++ b/src/detection/terminalsize/terminalsize.h
@@ -0,0 +1,13 @@
+#pragma once
+
+#include "fastfetch.h"
+#include "modules/terminalsize/option.h"
+
+typedef struct FFTerminalSizeResult {
+    uint16_t rows;
+    uint16_t columns;
+    uint16_t width;
+    uint16_t height;
+} FFTerminalSizeResult;
+
+bool ffDetectTerminalSize(FFTerminalSizeResult* result);
diff --git a/src/detection/terminalsize/terminalsize_linux.c b/src/detection/terminalsize/terminalsize_linux.c
new file mode 100644
index 0000000..e06f958
--- /dev/null
+++ b/src/detection/terminalsize/terminalsize_linux.c
@@ -0,0 +1,38 @@
+#include "terminalsize.h"
+#include "common/io.h"
+
+#include <sys/ioctl.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+#ifdef __sun
+    #include <sys/termios.h>
+#endif
+
+bool ffDetectTerminalSize(FFTerminalSizeResult* result) {
+    struct winsize winsize = {};
+    static int ttyfd = STDOUT_FILENO;
+    if (!isatty(ttyfd)) {
+        ttyfd = open("/dev/tty", O_RDWR | O_NOCTTY | O_CLOEXEC);
+    }
+
+    ioctl(ttyfd, TIOCGWINSZ, &winsize);
+
+    if (winsize.ws_row == 0 || winsize.ws_col == 0) {
+        ffGetTerminalResponse("\e[18t", 2, "\e[8;%hu;%hut", &winsize.ws_row, &winsize.ws_col);
+    }
+
+    if (winsize.ws_ypixel == 0 || winsize.ws_xpixel == 0) {
+        ffGetTerminalResponse("\e[14t", 2, "\e[4;%hu;%hut", &winsize.ws_ypixel, &winsize.ws_xpixel);
+    }
+
+    if (winsize.ws_row == 0 && winsize.ws_col == 0) {
+        return false;
+    }
+
+    result->rows = winsize.ws_row;
+    result->columns = winsize.ws_col;
+    result->width = winsize.ws_xpixel;
+    result->height = winsize.ws_ypixel;
+    return true;
+}
diff --git a/src/detection/terminalsize/terminalsize_windows.c b/src/detection/terminalsize/terminalsize_windows.c
new file mode 100644
index 0000000..05888e7
--- /dev/null
+++ b/src/detection/terminalsize/terminalsize_windows.c
@@ -0,0 +1,45 @@
+#include "terminalsize.h"
+#include "common/io.h"
+
+#include <windows.h>
+
+bool ffDetectTerminalSize(FFTerminalSizeResult* result) {
+    HANDLE hOutput = GetStdHandle(STD_OUTPUT_HANDLE);
+    FF_AUTO_CLOSE_FD HANDLE hConout = INVALID_HANDLE_VALUE;
+    {
+        DWORD outputMode;
+        if (!GetConsoleMode(hOutput, &outputMode)) {
+            hConout = CreateFileW(L"CONOUT$", GENERIC_READ | GENERIC_WRITE, FILE_SHARE_WRITE, 0, OPEN_EXISTING, 0, NULL);
+            hOutput = hConout;
+        }
+    }
+    {
+        CONSOLE_SCREEN_BUFFER_INFO csbi;
+        if (GetConsoleScreenBufferInfo(hOutput, &csbi)) {
+            result->columns = (uint16_t) (csbi.srWindow.Right - csbi.srWindow.Left + 1);
+            result->rows = (uint16_t) (csbi.srWindow.Bottom - csbi.srWindow.Top + 1);
+        } else {
+            // Windows Terminal doesn't report `\e` for some reason
+            ffGetTerminalResponse("\e[18t", 2, "%*[^;];%hu;%hut", &result->rows, &result->columns);
+        }
+    }
+
+    if (result->columns == 0 && result->rows == 0) {
+        return false;
+    }
+
+    {
+        CONSOLE_FONT_INFOEX cfi = { .cbSize = sizeof(cfi) };
+        if (GetCurrentConsoleFontEx(hOutput, FALSE, &cfi)) // Only works for ConHost
+        {
+            result->width = result->columns * (uint16_t) cfi.dwFontSize.X;
+            result->height = result->rows * (uint16_t) cfi.dwFontSize.Y;
+        }
+        if (result->width == 0 || result->height == 0) {
+            // Windows Terminal doesn't report `\e` for some reason
+            ffGetTerminalResponse("\e[14t", 2, "%*[^;];%hu;%hut", &result->height, &result->width);
+        }
+    }
+
+    return result->columns > 0 && result->rows > 0;
+}