termemu.c

#include "gdk/gdkkeysyms.h"
#include <vte/vte.h>
#define CLR_R(x) (((x)&0xff0000) >> 16)
#define CLR_G(x) (((x)&0x00ff00) >> 8)
#define CLR_B(x) (((x)&0x0000ff) >> 0)
#define CLR_16(x) ((double)(x) / 0xff)
#define CLR_GDK(x)                                                             \
  (const GdkRGBA) {                                                            \
    .red = CLR_16(CLR_R(x)), .green = CLR_16(CLR_G(x)),                        \
    .blue = CLR_16(CLR_B(x)), .alpha = 0.9                                     \
  }

static gboolean on_title_changed(GtkWidget *terminal, gpointer user_data) {
  GtkWindow *window = user_data;
  gtk_window_set_title(window,
                       vte_terminal_get_window_title(VTE_TERMINAL(terminal))
                           ?: "terminal");
  return TRUE;
}

static gboolean on_key_pressed(GtkWidget *terminal, GdkEventKey *event,
                               gpointer user_data) {
  gdouble s;
  switch (event->state & (GDK_CONTROL_MASK | GDK_SHIFT_MASK | GDK_MOD1_MASK)) {
  case GDK_CONTROL_MASK | GDK_SHIFT_MASK:
    switch (event->keyval) {
    case GDK_KEY_V:
      vte_terminal_paste_clipboard(VTE_TERMINAL(terminal));
      return TRUE;
    case GDK_KEY_C:
      vte_terminal_copy_clipboard_format(VTE_TERMINAL(terminal),
                                         VTE_FORMAT_TEXT);
      return TRUE;
    case GDK_KEY_plus:
      s = vte_terminal_get_font_scale(VTE_TERMINAL(terminal));
      s *= 1.1;
      vte_terminal_set_font_scale(VTE_TERMINAL(terminal), s);
      return TRUE;
    }
  case GDK_CONTROL_MASK:
    switch (event->keyval) {
    case GDK_KEY_minus:
      s = vte_terminal_get_font_scale(VTE_TERMINAL(terminal));
      s *= 1.0 / 1.1;
      vte_terminal_set_font_scale(VTE_TERMINAL(terminal), s);
      return TRUE;
    case GDK_KEY_Escape:
      vte_terminal_set_font_scale(VTE_TERMINAL(terminal), 1);
      return TRUE;
    }
  }
  return FALSE;
}

static void child_ready(VteTerminal *terminal, GPid pid, GError *error,
                        gpointer user_data) {
  if (!terminal)
    return;
  if (pid == -1)
    gtk_main_quit();
}
int main(int argc, char *argv[]) {
  GtkWidget *window, *terminal;

  /* Initialise GTK, the window and the terminal */
  gtk_init(&argc, &argv);
  terminal = vte_terminal_new();
  window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
  gtk_window_set_title(GTK_WINDOW(window), "psiterm");

  /* Start a new shell */
  gchar **envp = g_get_environ();
  gchar **command =
      (gchar *[]){g_strdup(g_environ_getenv(envp, "SHELL")), NULL};
  g_strfreev(envp);
  vte_terminal_spawn_async(VTE_TERMINAL(terminal), VTE_PTY_DEFAULT,
                           NULL,        /* working directory  */
                           command,     /* command */
                           NULL,        /* environment */
                           0,           /* spawn flags */
                           NULL, NULL,  /* child setup */
                           NULL,        /* child pid */
                           -1,          /* timeout */
                           NULL,        /* cancellable */
                           child_ready, /* callback */
                           NULL);       /* user_data */

  vte_terminal_set_colors(
      VTE_TERMINAL(terminal), &CLR_GDK(0xffffff), &(GdkRGBA){.alpha = 0.85},
      (const GdkRGBA[]){CLR_GDK(0x111111), CLR_GDK(0xd36265), CLR_GDK(0xaece91),
                        CLR_GDK(0xe7e18c), CLR_GDK(0x5297cf), CLR_GDK(0x963c59),
                        CLR_GDK(0x5E7175), CLR_GDK(0xbebebe), CLR_GDK(0x666666),
                        CLR_GDK(0xef8171), CLR_GDK(0xcfefb3), CLR_GDK(0xfff796),
                        CLR_GDK(0x74b8ef), CLR_GDK(0xb85e7b), CLR_GDK(0xA3BABF),
                        CLR_GDK(0xffffff)},
      16);

  vte_terminal_set_scrollback_lines(VTE_TERMINAL(terminal), 0);
  vte_terminal_set_scroll_on_output(VTE_TERMINAL(terminal), FALSE);
  vte_terminal_set_scroll_on_keystroke(VTE_TERMINAL(terminal), TRUE);
  vte_terminal_set_mouse_autohide(VTE_TERMINAL(terminal), TRUE);
  vte_terminal_set_cursor_blink_mode(VTE_TERMINAL(terminal),
                                     VTE_CURSOR_BLINK_OFF);

  /* Connect some signals */
  g_signal_connect(window, "delete-event", gtk_main_quit, NULL);
  g_signal_connect(terminal, "child-exited", gtk_main_quit, NULL);
  g_signal_connect(terminal, "window-title-changed",
                   G_CALLBACK(on_title_changed), GTK_WINDOW(window));
  g_signal_connect(terminal, "key-press-event", G_CALLBACK(on_key_pressed),
                   GTK_WINDOW(window));

  /* Put widgets together and run the main loop */
  gtk_container_add(GTK_CONTAINER(window), terminal);
  gtk_widget_show_all(window);
  gtk_main();
}