i3/i3-config-wizard/main.c

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/*
* vim:ts=4:sw=4:expandtab
*
* i3 - an improved dynamic tiling window manager
*
* © 2011 Michael Stapelberg and contributors
*
* See file LICENSE for license information.
*
* i3-config-wizard: Program to convert configs using keycodes to configs using
* keysyms.
*
*/
#include <ev.h>
#include <stdio.h>
#include <sys/types.h>
#include <stdlib.h>
#include <stdbool.h>
#include <unistd.h>
#include <string.h>
#include <ctype.h>
#include <errno.h>
#include <err.h>
#include <stdint.h>
#include <getopt.h>
#include <limits.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <glob.h>
#include <xcb/xcb.h>
#include <xcb/xcb_aux.h>
#include <xcb/xcb_event.h>
#include <xcb/xcb_keysyms.h>
#include <X11/Xlib.h>
#include <X11/keysym.h>
/* We need SYSCONFDIR for the path to the keycode config template, so raise an
* error if its not defined for whatever reason */
#ifndef SYSCONFDIR
#error "SYSCONFDIR not defined"
#endif
#define FREE(pointer) do { \
if (pointer != NULL) { \
free(pointer); \
pointer = NULL; \
} \
} \
while (0)
#include "xcb.h"
#include "ipc.h"
enum { STEP_WELCOME, STEP_GENERATE } current_step = STEP_WELCOME;
enum { MOD_ALT, MOD_SUPER } modifier = MOD_SUPER;
static char *config_path;
static xcb_connection_t *conn;
static uint32_t font_id;
static uint32_t font_bold_id;
static char *socket_path;
static int font_height;
static int font_bold_height;
static xcb_window_t win;
static xcb_pixmap_t pixmap;
static xcb_gcontext_t pixmap_gc;
static xcb_key_symbols_t *symbols;
xcb_window_t root;
Display *dpy;
char *rewrite_binding(const char *bindingline);
static void finish();
#if defined(__APPLE__)
/*
* Taken from FreeBSD
* Returns a pointer to a new string which is a duplicate of the
* string, but only copies at most n characters.
*
*/
char *strndup(const char *str, size_t n) {
size_t len;
char *copy;
for (len = 0; len < n && str[len]; len++)
continue;
if ((copy = malloc(len + 1)) == NULL)
return (NULL);
memcpy(copy, str, len);
copy[len] = '\0';
return (copy);
}
#endif
/*
* This function resolves ~ in pathnames.
* It may resolve wildcards in the first part of the path, but if no match
* or multiple matches are found, it just returns a copy of path as given.
*
*/
static char *resolve_tilde(const char *path) {
static glob_t globbuf;
char *head, *tail, *result;
tail = strchr(path, '/');
head = strndup(path, tail ? tail - path : strlen(path));
int res = glob(head, GLOB_TILDE, NULL, &globbuf);
free(head);
/* no match, or many wildcard matches are bad */
if (res == GLOB_NOMATCH || globbuf.gl_pathc != 1)
result = strdup(path);
else if (res != 0) {
err(1, "glob() failed");
} else {
head = globbuf.gl_pathv[0];
result = calloc(1, strlen(head) + (tail ? strlen(tail) : 0) + 1);
strncpy(result, head, strlen(head));
if (tail)
strncat(result, tail, strlen(tail));
}
globfree(&globbuf);
return result;
}
/*
* Try to get the socket path from X11 and return NULL if it doesnt work.
* As i3-msg is a short-running tool, we dont bother with cleaning up the
* connection and leave it up to the operating system on exit.
*
*/
static char *socket_path_from_x11() {
xcb_connection_t *conn;
int screen;
if ((conn = xcb_connect(NULL, &screen)) == NULL ||
xcb_connection_has_error(conn))
return NULL;
xcb_screen_t *root_screen = xcb_aux_get_screen(conn, screen);
xcb_window_t root = root_screen->root;
xcb_intern_atom_cookie_t atom_cookie;
xcb_intern_atom_reply_t *atom_reply;
atom_cookie = xcb_intern_atom(conn, 0, strlen("I3_SOCKET_PATH"), "I3_SOCKET_PATH");
atom_reply = xcb_intern_atom_reply(conn, atom_cookie, NULL);
if (atom_reply == NULL)
return NULL;
xcb_get_property_cookie_t prop_cookie;
xcb_get_property_reply_t *prop_reply;
prop_cookie = xcb_get_property_unchecked(conn, false, root, atom_reply->atom,
XCB_GET_PROPERTY_TYPE_ANY, 0, PATH_MAX);
prop_reply = xcb_get_property_reply(conn, prop_cookie, NULL);
if (prop_reply == NULL || xcb_get_property_value_length(prop_reply) == 0)
return NULL;
if (asprintf(&socket_path, "%.*s", xcb_get_property_value_length(prop_reply),
(char*)xcb_get_property_value(prop_reply)) == -1)
return NULL;
return socket_path;
}
/*
* Handles expose events, that is, draws the window contents.
*
*/
static int handle_expose() {
/* re-draw the background */
xcb_rectangle_t border = {0, 0, 300, (15*font_height) + 8},
inner = {2, 2, 296, (15*font_height) + 8 - 4};
xcb_change_gc_single(conn, pixmap_gc, XCB_GC_FOREGROUND, get_colorpixel(conn, "#285577"));
xcb_poly_fill_rectangle(conn, pixmap, pixmap_gc, 1, &border);
xcb_change_gc_single(conn, pixmap_gc, XCB_GC_FOREGROUND, get_colorpixel(conn, "#000000"));
xcb_poly_fill_rectangle(conn, pixmap, pixmap_gc, 1, &inner);
xcb_change_gc_single(conn, pixmap_gc, XCB_GC_FONT, font_id);
#define txt(x, row, text) xcb_image_text_8(conn, strlen(text), pixmap, pixmap_gc, x, (row * font_height) + 2, text)
if (current_step == STEP_WELCOME) {
/* restore font color */
xcb_change_gc_single(conn, pixmap_gc, XCB_GC_FOREGROUND, get_colorpixel(conn, "#FFFFFF"));
txt(10, 1, "i3: first configuration");
txt(10, 4, "You have not configured i3 yet.");
txt(10, 5, "Do you want me to generate ~/.i3/config?");
txt(85, 8, "Yes, generate ~/.i3/config");
txt(85, 10, "No, I will use the defaults");
/* green */
xcb_change_gc_single(conn, pixmap_gc, XCB_GC_FOREGROUND, get_colorpixel(conn, "#00FF00"));
txt(25, 8, "<Enter>");
/* red */
xcb_change_gc_single(conn, pixmap_gc, XCB_GC_FOREGROUND, get_colorpixel(conn, "#FF0000"));
txt(31, 10, "<ESC>");
}
if (current_step == STEP_GENERATE) {
xcb_change_gc_single(conn, pixmap_gc, XCB_GC_FOREGROUND, get_colorpixel(conn, "#FFFFFF"));
txt(10, 1, "i3: generate config");
txt(10, 4, "Please choose either:");
txt(85, 6, "Win as default modifier");
txt(85, 7, "Alt as default modifier");
txt(10, 9, "Afterwards, press");
txt(85, 11, "to write ~/.i3/config");
txt(85, 12, "to abort");
/* the not-selected modifier */
if (modifier == MOD_SUPER)
txt(31, 7, "<Alt>");
else txt(31, 6, "<Win>");
/* the selected modifier */
xcb_change_gc_single(conn, pixmap_gc, XCB_GC_FONT, font_bold_id);
if (modifier == MOD_SUPER)
txt(31, 6, "<Win>");
else txt(31, 7, "<Alt>");
/* green */
uint32_t mask = XCB_GC_FOREGROUND | XCB_GC_FONT;
uint32_t values[] = { get_colorpixel(conn, "#00FF00"), font_id };
xcb_change_gc(conn, pixmap_gc, mask, values);
txt(25, 11, "<Enter>");
/* red */
xcb_change_gc_single(conn, pixmap_gc, XCB_GC_FOREGROUND, get_colorpixel(conn, "#FF0000"));
txt(31, 12, "<ESC>");
}
/* Copy the contents of the pixmap to the real window */
xcb_copy_area(conn, pixmap, win, pixmap_gc, 0, 0, 0, 0, /* */ 500, 500);
xcb_flush(conn);
return 1;
}
static int handle_key_press(void *ignored, xcb_connection_t *conn, xcb_key_press_event_t *event) {
printf("Keypress %d, state raw = %d\n", event->detail, event->state);
/* Remove the numlock bit, all other bits are modifiers we can bind to */
uint16_t state_filtered = event->state & ~(xcb_numlock_mask | XCB_MOD_MASK_LOCK);
/* Only use the lower 8 bits of the state (modifier masks) so that mouse
* button masks are filtered out */
state_filtered &= 0xFF;
xcb_keysym_t sym = xcb_key_press_lookup_keysym(symbols, event, state_filtered);
printf("sym = %c (%d)\n", sym, sym);
if (sym == XK_Return || sym == XK_KP_Enter) {
if (current_step == STEP_WELCOME)
current_step = STEP_GENERATE;
else finish();
}
/* cancel any time */
if (sym == XK_Escape)
exit(0);
if (sym == XK_Alt_L)
modifier = MOD_ALT;
if (sym == XK_Super_L)
modifier = MOD_SUPER;
handle_expose();
return 1;
}
/*
* Creates the config file and tells i3 to reload.
*
*/
static void finish() {
printf("creating \"%s\"...\n", config_path);
if (!(dpy = XOpenDisplay(NULL)))
errx(1, "Could not connect to X11");
FILE *kc_config = fopen(SYSCONFDIR "/i3/config.keycodes", "r");
if (kc_config == NULL)
err(1, "Could not open input file \"%s\"", SYSCONFDIR "/i3/config.keycodes");
FILE *ks_config = fopen(config_path, "w");
if (ks_config == NULL)
err(1, "Could not open output config file \"%s\"", config_path);
char *line = NULL;
size_t len = 0;
#if !defined(__APPLE__)
ssize_t read;
#endif
bool head_of_file = true;
/* write a header about auto-generation to the output file */
fputs("# This file has been auto-generated by i3-config-wizard(1).\n", ks_config);
fputs("# It will not be overwritten, so edit it as you like.\n", ks_config);
fputs("#\n", ks_config);
fputs("# Should you change your keyboard layout somewhen, delete\n", ks_config);
fputs("# this file and re-run i3-config-wizard(1).\n", ks_config);
fputs("#\n", ks_config);
#if defined(__APPLE__)
while ((line = fgetln(kc_config, &len)) != NULL) {
#else
while ((read = getline(&line, &len, kc_config)) != -1) {
#endif
/* skip the warning block at the beginning of the input file */
if (head_of_file &&
strncmp("# WARNING", line, strlen("# WARNING")) == 0)
continue;
head_of_file = false;
/* Skip leading whitespace */
char *walk = line;
while (isspace(*walk) && walk < (line + len))
walk++;
/* Set the modifier the user chose */
if (strncmp(walk, "set $mod ", strlen("set $mod ")) == 0) {
if (modifier == MOD_ALT)
fputs("set $mod Mod1\n", ks_config);
else fputs("set $mod Mod4\n", ks_config);
continue;
}
/* Check for 'bindcode'. If its not a bindcode line, we
* just copy it to the output file */
if (strncmp(walk, "bindcode", strlen("bindcode")) != 0) {
fputs(line, ks_config);
continue;
}
char *result = rewrite_binding(walk);
fputs(result, ks_config);
free(result);
}
/* sync to do our best in order to have the file really stored on disk */
fflush(ks_config);
fsync(fileno(ks_config));
free(line);
fclose(kc_config);
fclose(ks_config);
/* tell i3 to reload the config file */
int sockfd = connect_ipc(socket_path);
ipc_send_message(sockfd, strlen("reload"), 0, (uint8_t*)"reload");
close(sockfd);
exit(0);
}
int main(int argc, char *argv[]) {
config_path = resolve_tilde("~/.i3/config");
socket_path = getenv("I3SOCK");
char *pattern = "-misc-fixed-medium-r-normal--13-120-75-75-C-70-iso10646-1";
char *patternbold = "-misc-fixed-bold-r-normal--13-120-75-75-C-70-iso10646-1";
int o, option_index = 0;
static struct option long_options[] = {
{"socket", required_argument, 0, 's'},
{"version", no_argument, 0, 'v'},
{"limit", required_argument, 0, 'l'},
{"prompt", required_argument, 0, 'P'},
{"prefix", required_argument, 0, 'p'},
{"font", required_argument, 0, 'f'},
{"help", no_argument, 0, 'h'},
{0, 0, 0, 0}
};
char *options_string = "s:vh";
while ((o = getopt_long(argc, argv, options_string, long_options, &option_index)) != -1) {
switch (o) {
case 's':
FREE(socket_path);
socket_path = strdup(optarg);
break;
case 'v':
printf("i3-config-wizard " I3_VERSION "\n");
return 0;
case 'h':
printf("i3-config-wizard " I3_VERSION "\n");
printf("i3-config-wizard [-s <socket>] [-v]\n");
return 0;
}
}
/* Check if the destination config file does not exist but the path is
* writable. If not, exit now, this program is not useful in that case. */
struct stat stbuf;
if (stat(config_path, &stbuf) == 0) {
printf("The config file \"%s\" already exists. Exiting.\n", config_path);
return 0;
}
/* Create ~/.i3 if it does not yet exist */
char *config_dir = resolve_tilde("~/.i3");
if (stat(config_dir, &stbuf) != 0)
if (mkdir(config_dir, 0755) == -1)
err(1, "mkdir(%s) failed", config_dir);
free(config_dir);
int fd;
if ((fd = open(config_path, O_CREAT | O_RDWR, 0644)) == -1) {
printf("Cannot open file \"%s\" for writing: %s. Exiting.\n", config_path, strerror(errno));
return 0;
}
close(fd);
unlink(config_path);
if (socket_path == NULL)
socket_path = socket_path_from_x11();
if (socket_path == NULL)
socket_path = "/tmp/i3-ipc.sock";
int screens;
if ((conn = xcb_connect(NULL, &screens)) == NULL ||
xcb_connection_has_error(conn))
errx(1, "Cannot open display\n");
xcb_screen_t *root_screen = xcb_aux_get_screen(conn, screens);
root = root_screen->root;
xcb_get_numlock_mask(conn);
symbols = xcb_key_symbols_alloc(conn);
font_id = get_font_id(conn, pattern, &font_height);
font_bold_id = get_font_id(conn, patternbold, &font_bold_height);
/* Open an input window */
win = open_input_window(conn, 300, 205);
/* Create pixmap */
pixmap = xcb_generate_id(conn);
pixmap_gc = xcb_generate_id(conn);
xcb_create_pixmap(conn, root_screen->root_depth, pixmap, win, 500, 500);
xcb_create_gc(conn, pixmap_gc, pixmap, 0, 0);
/* Set input focus (we have override_redirect=1, so the wm will not do
* this for us) */
xcb_set_input_focus(conn, XCB_INPUT_FOCUS_POINTER_ROOT, win, XCB_CURRENT_TIME);
/* Grab the keyboard to get all input */
xcb_flush(conn);
/* Try (repeatedly, if necessary) to grab the keyboard. We might not
* get the keyboard at the first attempt because of the keybinding
* still being active when started via a wms keybinding. */
xcb_grab_keyboard_cookie_t cookie;
xcb_grab_keyboard_reply_t *reply = NULL;
int count = 0;
while ((reply == NULL || reply->status != XCB_GRAB_STATUS_SUCCESS) && (count++ < 500)) {
cookie = xcb_grab_keyboard(conn, false, win, XCB_CURRENT_TIME, XCB_GRAB_MODE_ASYNC, XCB_GRAB_MODE_ASYNC);
reply = xcb_grab_keyboard_reply(conn, cookie, NULL);
usleep(1000);
}
if (reply->status != XCB_GRAB_STATUS_SUCCESS) {
fprintf(stderr, "Could not grab keyboard, status = %d\n", reply->status);
exit(-1);
}
xcb_flush(conn);
xcb_generic_event_t *event;
while ((event = xcb_wait_for_event(conn)) != NULL) {
if (event->response_type == 0) {
fprintf(stderr, "X11 Error received! sequence %x\n", event->sequence);
continue;
}
/* Strip off the highest bit (set if the event is generated) */
int type = (event->response_type & 0x7F);
switch (type) {
case XCB_KEY_PRESS:
handle_key_press(NULL, conn, (xcb_key_press_event_t*)event);
break;
/* TODO: handle mappingnotify */
case XCB_EXPOSE:
handle_expose();
break;
}
free(event);
}
return 0;
}