227 lines
6.4 KiB
C++
227 lines
6.4 KiB
C++
/*
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* main.cpp
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* MontaukOS Kernel Log - standalone Window Server app
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* Preserves the old desktop-integrated log viewer layout
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* Copyright (c) 2026 Daniel Hammer
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*/
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#include <montauk/syscall.h>
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#include <montauk/string.h>
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#include <montauk/heap.h>
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#include <gui/gui.hpp>
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#include <gui/canvas.hpp>
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#include <gui/standalone.hpp>
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#include <gui/terminal.hpp>
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#include <gui/truetype.hpp>
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using namespace gui;
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static constexpr int INIT_W = 718;
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static constexpr int INIT_H = 449;
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static constexpr int KLOG_READ_SIZE = 65536;
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static constexpr int KLOG_POLL_MS = 250;
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struct KlogState {
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TerminalState term;
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char* klog_buf;
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int last_len;
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char last_tail_byte;
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uint64_t last_poll_ms;
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uint32_t* last_pixels;
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};
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static WsWindow g_win;
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static KlogState g_klog = {};
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static void klog_refeed(int n) {
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int lines_needed = g_klog.term.rows + g_klog.term.max_scrollback;
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int start = 0;
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int line_count = 0;
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for (int i = n - 1; i >= 0; i--) {
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if (g_klog.klog_buf[i] == '\n') {
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line_count++;
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if (line_count >= lines_needed) {
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start = i + 1;
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break;
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}
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}
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}
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g_klog.term.scrollback_lines = 0;
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g_klog.term.view_offset = 0;
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g_klog.term.cursor_x = 0;
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g_klog.term.cursor_y = 0;
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g_klog.term.current_fg = colors::TERM_FG;
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g_klog.term.current_bg = colors::TERM_BG;
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TermCell* screen = term_screen_row(&g_klog.term, 0);
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int total = g_klog.term.cols * g_klog.term.rows;
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for (int i = 0; i < total; i++)
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screen[i] = {' ', colors::TERM_FG, colors::TERM_BG};
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terminal_feed(&g_klog.term, g_klog.klog_buf + start, n - start);
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}
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static bool klog_poll() {
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uint64_t now = montauk::get_milliseconds();
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if (now - g_klog.last_poll_ms < KLOG_POLL_MS) return false;
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g_klog.last_poll_ms = now;
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int n = (int)montauk::read_klog(g_klog.klog_buf, KLOG_READ_SIZE);
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if (n <= 0 && g_klog.last_len <= 0) return false;
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if (n > g_klog.last_len) {
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terminal_feed(&g_klog.term, g_klog.klog_buf + g_klog.last_len, n - g_klog.last_len);
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} else if (n == g_klog.last_len && n > 0) {
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if (g_klog.klog_buf[n - 1] != g_klog.last_tail_byte) {
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klog_refeed(n);
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} else {
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return false;
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}
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} else if (n < g_klog.last_len) {
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klog_refeed(n);
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}
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g_klog.last_len = n;
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if (n > 0) g_klog.last_tail_byte = g_klog.klog_buf[n - 1];
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return true;
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}
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static bool klog_render() {
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if (!g_win.pixels || !g_klog.term.cells) return false;
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int new_cols = g_win.width / mono_cell_width();
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int new_rows = g_win.height / mono_cell_height();
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if (new_cols < 1) new_cols = 1;
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if (new_rows < 1) new_rows = 1;
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if (new_cols != g_klog.term.cols || new_rows != g_klog.term.rows) {
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terminal_resize(&g_klog.term, new_cols, new_rows);
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if (g_klog.last_len > 0)
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klog_refeed(g_klog.last_len);
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}
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if (g_win.pixels != g_klog.last_pixels) {
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g_klog.last_pixels = g_win.pixels;
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g_klog.term.dirty = true;
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}
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if (!g_klog.term.dirty) return false;
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bool was_dirty = g_klog.term.dirty;
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terminal_render(&g_klog.term, g_win.pixels, g_win.width, g_win.height);
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if (was_dirty && g_klog.term.scrollback_lines > 0) {
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int cell_h = mono_cell_height();
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int total_rows = g_klog.term.scrollback_lines + g_klog.term.rows;
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int total_h = total_rows * cell_h;
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int view_h = g_win.height;
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if (total_h > view_h) {
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Canvas c = g_win.canvas();
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int sb_w = 4;
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int sb_x = g_win.width - sb_w - 2;
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int thumb_h = (view_h * view_h) / total_h;
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if (thumb_h < 20) thumb_h = 20;
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int scroll_from_top = g_klog.term.scrollback_lines - g_klog.term.view_offset;
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int max_scroll = g_klog.term.scrollback_lines;
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int thumb_y = (max_scroll > 0)
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? (scroll_from_top * (view_h - thumb_h)) / max_scroll : 0;
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c.fill_rect(sb_x, 0, sb_w, view_h, Color::from_rgb(0x33, 0x33, 0x33));
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c.fill_rect(sb_x, thumb_y, sb_w, thumb_h, Color::from_rgb(0x88, 0x88, 0x88));
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}
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}
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return true;
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}
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static void klog_handle_mouse(const Montauk::WinEvent& ev) {
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if (ev.mouse.scroll == 0) return;
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g_klog.term.view_offset += (ev.mouse.scroll < 0) ? 3 : -3;
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if (g_klog.term.view_offset < 0) g_klog.term.view_offset = 0;
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if (g_klog.term.view_offset > g_klog.term.scrollback_lines)
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g_klog.term.view_offset = g_klog.term.scrollback_lines;
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g_klog.term.dirty = true;
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}
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static void klog_cleanup() {
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if (g_klog.term.cells) montauk::free(g_klog.term.cells);
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if (g_klog.term.alt_cells) montauk::free(g_klog.term.alt_cells);
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if (g_klog.klog_buf) montauk::mfree(g_klog.klog_buf);
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montauk::memset(&g_klog, 0, sizeof(g_klog));
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}
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extern "C" void _start() {
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if (!fonts::init())
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montauk::exit(1);
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if (!g_win.create("Kernel Log", INIT_W, INIT_H))
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montauk::exit(1);
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int cols = g_win.width / mono_cell_width();
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int rows = g_win.height / mono_cell_height();
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if (cols < 1) cols = 1;
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if (rows < 1) rows = 1;
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terminal_init_cells(&g_klog.term, cols, rows, TERM_MAX_SCROLLBACK);
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if (!g_klog.term.cells || !g_klog.term.alt_cells) {
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g_win.destroy();
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montauk::exit(1);
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}
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g_klog.klog_buf = (char*)montauk::malloc(KLOG_READ_SIZE);
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if (!g_klog.klog_buf) {
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klog_cleanup();
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g_win.destroy();
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montauk::exit(1);
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}
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g_klog.last_pixels = g_win.pixels;
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int n = (int)montauk::read_klog(g_klog.klog_buf, KLOG_READ_SIZE);
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if (n > 0) {
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klog_refeed(n);
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g_klog.last_len = n;
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g_klog.last_tail_byte = g_klog.klog_buf[n - 1];
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}
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if (klog_render())
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g_win.present();
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while (true) {
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bool redraw = klog_poll();
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Montauk::WinEvent ev;
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bool quit = false;
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int r = 0;
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while ((r = g_win.poll(&ev)) > 0) {
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redraw = true;
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if (ev.type == 3) {
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quit = true;
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break;
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}
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if (ev.type == 1) {
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klog_handle_mouse(ev);
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} else if (ev.type == 2 || ev.type == 4) {
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g_klog.term.dirty = true;
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}
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}
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if (r < 0 || quit) break;
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if (redraw && klog_render())
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g_win.present();
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if (r == 0)
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montauk::sleep_ms(16);
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}
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klog_cleanup();
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g_win.destroy();
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montauk::exit(0);
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}
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