403 lines
14 KiB
C
403 lines
14 KiB
C
/*
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* vim:ts=8:expandtab
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*
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* i3 - an improved dynamic tiling window manager
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*
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* © 2009-2010 Michael Stapelberg and contributors
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*
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* See file LICENSE for license information.
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*
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* src/config.c: Contains all functions handling the configuration file (calling
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* the parser (src/cfgparse.y) with the correct path, switching key bindings
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* mode).
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*
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*/
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#include <stdio.h>
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#include <string.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <stdlib.h>
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#include <glob.h>
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#include <wordexp.h>
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#include <unistd.h>
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/* We need Xlib for XStringToKeysym */
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#include <X11/Xlib.h>
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#include <xcb/xcb_keysyms.h>
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#include "i3.h"
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#include "util.h"
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#include "config.h"
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#include "xcb.h"
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#include "table.h"
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#include "workspace.h"
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#include "log.h"
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Config config;
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struct modes_head modes;
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/*
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* This function resolves ~ in pathnames.
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*
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*/
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char *glob_path(const char *path) {
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static glob_t globbuf;
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if (glob(path, GLOB_NOCHECK | GLOB_TILDE, NULL, &globbuf) < 0)
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die("glob() failed");
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char *result = sstrdup(globbuf.gl_pathc > 0 ? globbuf.gl_pathv[0] : path);
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globfree(&globbuf);
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/* If the file does not exist yet, we still may need to resolve tilde,
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* so call wordexp */
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if (strcmp(result, path) == 0) {
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wordexp_t we;
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wordexp(path, &we, WRDE_NOCMD);
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if (we.we_wordc > 0) {
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free(result);
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result = sstrdup(we.we_wordv[0]);
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}
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wordfree(&we);
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}
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return result;
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}
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/*
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* Checks if the given path exists by calling stat().
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*
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*/
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bool path_exists(const char *path) {
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struct stat buf;
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return (stat(path, &buf) == 0);
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}
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/**
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* Ungrabs all keys, to be called before re-grabbing the keys because of a
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* mapping_notify event or a configuration file reload
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*
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*/
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void ungrab_all_keys(xcb_connection_t *conn) {
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DLOG("Ungrabbing all keys\n");
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xcb_ungrab_key(conn, XCB_GRAB_ANY, root, XCB_BUTTON_MASK_ANY);
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}
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static void grab_keycode_for_binding(xcb_connection_t *conn, Binding *bind, uint32_t keycode) {
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DLOG("Grabbing %d\n", keycode);
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/* Grab the key in all combinations */
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#define GRAB_KEY(modifier) \
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do { \
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xcb_grab_key(conn, 0, root, modifier, keycode, \
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XCB_GRAB_MODE_SYNC, XCB_GRAB_MODE_ASYNC); \
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} while (0)
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int mods = bind->mods;
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if ((bind->mods & BIND_MODE_SWITCH) != 0) {
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mods &= ~BIND_MODE_SWITCH;
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if (mods == 0)
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mods = XCB_MOD_MASK_ANY;
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}
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GRAB_KEY(mods);
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GRAB_KEY(mods | xcb_numlock_mask);
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GRAB_KEY(mods | xcb_numlock_mask | XCB_MOD_MASK_LOCK);
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}
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/*
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* Returns a pointer to the Binding with the specified modifiers and keycode
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* or NULL if no such binding exists.
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*
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*/
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Binding *get_binding(uint16_t modifiers, xcb_keycode_t keycode) {
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Binding *bind;
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TAILQ_FOREACH(bind, bindings, bindings) {
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/* First compare the modifiers */
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if (bind->mods != modifiers)
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continue;
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/* If a symbol was specified by the user, we need to look in
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* the array of translated keycodes for the event’s keycode */
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if (bind->symbol != NULL) {
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if (memmem(bind->translated_to,
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bind->number_keycodes * sizeof(xcb_keycode_t),
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&keycode, sizeof(xcb_keycode_t)) != NULL)
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break;
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} else {
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/* This case is easier: The user specified a keycode */
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if (bind->keycode == keycode)
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break;
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}
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}
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return (bind == TAILQ_END(bindings) ? NULL : bind);
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}
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/*
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* Translates keysymbols to keycodes for all bindings which use keysyms.
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*
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*/
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void translate_keysyms() {
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Binding *bind;
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TAILQ_FOREACH(bind, bindings, bindings) {
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if (bind->keycode > 0)
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continue;
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/* We need to translate the symbol to a keycode */
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xcb_keysym_t keysym = XStringToKeysym(bind->symbol);
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if (keysym == NoSymbol) {
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ELOG("Could not translate string to key symbol: \"%s\"\n", bind->symbol);
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continue;
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}
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#ifdef OLD_XCB_KEYSYMS_API
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bind->number_keycodes = 1;
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xcb_keycode_t code = xcb_key_symbols_get_keycode(keysyms, keysym);
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DLOG("Translated symbol \"%s\" to 1 keycode (%d)\n", bind->symbol, code);
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grab_keycode_for_binding(global_conn, bind, code);
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bind->translated_to = smalloc(sizeof(xcb_keycode_t));
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memcpy(bind->translated_to, &code, sizeof(xcb_keycode_t));
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#else
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uint32_t last_keycode = 0;
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xcb_keycode_t *keycodes = xcb_key_symbols_get_keycode(keysyms, keysym);
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if (keycodes == NULL) {
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DLOG("Could not translate symbol \"%s\"\n", bind->symbol);
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continue;
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}
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bind->number_keycodes = 0;
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for (xcb_keycode_t *walk = keycodes; *walk != 0; walk++) {
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/* We hope duplicate keycodes will be returned in order
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* and skip them */
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if (last_keycode == *walk)
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continue;
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last_keycode = *walk;
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bind->number_keycodes++;
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}
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DLOG("Translated symbol \"%s\" to %d keycode\n", bind->symbol, bind->number_keycodes);
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bind->translated_to = smalloc(bind->number_keycodes * sizeof(xcb_keycode_t));
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memcpy(bind->translated_to, keycodes, bind->number_keycodes * sizeof(xcb_keycode_t));
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free(keycodes);
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#endif
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}
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}
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/*
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* Grab the bound keys (tell X to send us keypress events for those keycodes)
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*
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*/
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void grab_all_keys(xcb_connection_t *conn, bool bind_mode_switch) {
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Binding *bind;
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TAILQ_FOREACH(bind, bindings, bindings) {
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if ((bind_mode_switch && (bind->mods & BIND_MODE_SWITCH) == 0) ||
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(!bind_mode_switch && (bind->mods & BIND_MODE_SWITCH) != 0))
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continue;
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/* The easy case: the user specified a keycode directly. */
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if (bind->keycode > 0) {
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grab_keycode_for_binding(conn, bind, bind->keycode);
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continue;
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}
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xcb_keycode_t *walk = bind->translated_to;
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for (int i = 0; i < bind->number_keycodes; i++)
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grab_keycode_for_binding(conn, bind, *walk);
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}
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}
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/*
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* Switches the key bindings to the given mode, if the mode exists
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*
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*/
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void switch_mode(xcb_connection_t *conn, const char *new_mode) {
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struct Mode *mode;
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LOG("Switching to mode %s\n", new_mode);
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SLIST_FOREACH(mode, &modes, modes) {
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if (strcasecmp(mode->name, new_mode) != 0)
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continue;
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ungrab_all_keys(conn);
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bindings = mode->bindings;
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translate_keysyms();
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grab_all_keys(conn, false);
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return;
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}
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ELOG("ERROR: Mode not found\n");
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}
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/*
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* Get the path of the first configuration file found. Checks the XDG folders
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* first ($XDG_CONFIG_HOME, $XDG_CONFIG_DIRS), then the traditional paths.
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*
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*/
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static char *get_config_path() {
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/* 1: check for $XDG_CONFIG_HOME/i3/config */
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char *xdg_config_home, *xdg_config_dirs, *config_path;
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if ((xdg_config_home = getenv("XDG_CONFIG_HOME")) == NULL)
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xdg_config_home = "~/.config";
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xdg_config_home = glob_path(xdg_config_home);
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if (asprintf(&config_path, "%s/i3/config", xdg_config_home) == -1)
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die("asprintf() failed");
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free(xdg_config_home);
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if (path_exists(config_path))
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return config_path;
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free(config_path);
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/* 2: check for $XDG_CONFIG_DIRS/i3/config */
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if ((xdg_config_dirs = getenv("XDG_CONFIG_DIRS")) == NULL)
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xdg_config_dirs = "/etc/xdg";
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char *buf = sstrdup(xdg_config_dirs);
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char *tok = strtok(buf, ":");
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while (tok != NULL) {
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tok = glob_path(tok);
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if (asprintf(&config_path, "%s/i3/config", tok) == -1)
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die("asprintf() failed");
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free(tok);
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if (path_exists(config_path)) {
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free(buf);
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return config_path;
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}
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free(config_path);
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tok = strtok(NULL, ":");
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}
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free(buf);
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/* 3: check traditional paths */
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config_path = glob_path("~/.i3/config");
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if (path_exists(config_path))
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return config_path;
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config_path = sstrdup("/etc/i3/config");
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if (!path_exists(config_path))
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die("Neither $XDG_CONFIG_HOME/i3/config, nor "
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"$XDG_CONFIG_DIRS/i3/config, nor ~/.i3/config nor "
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"/etc/i3/config exist.");
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return config_path;
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}
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/*
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* Finds the configuration file to use (either the one specified by
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* override_configpath), the user’s one or the system default) and calls
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* parse_file().
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*
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*/
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static void parse_configuration(const char *override_configpath) {
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if (override_configpath != NULL) {
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parse_file(override_configpath);
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return;
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}
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char *path = get_config_path();
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DLOG("Parsing configfile %s\n", path);
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parse_file(path);
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free(path);
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}
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/*
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* (Re-)loads the configuration file (sets useful defaults before).
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*
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*/
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void load_configuration(xcb_connection_t *conn, const char *override_configpath, bool reload) {
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if (reload) {
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/* First ungrab the keys */
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ungrab_all_keys(conn);
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struct Mode *mode;
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Binding *bind;
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while (!SLIST_EMPTY(&modes)) {
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mode = SLIST_FIRST(&modes);
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FREE(mode->name);
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/* Clear the old binding list */
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bindings = mode->bindings;
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while (!TAILQ_EMPTY(bindings)) {
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bind = TAILQ_FIRST(bindings);
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TAILQ_REMOVE(bindings, bind, bindings);
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FREE(bind->translated_to);
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FREE(bind->command);
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FREE(bind);
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}
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FREE(bindings);
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SLIST_REMOVE(&modes, mode, Mode, modes);
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}
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struct Assignment *assign;
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while (!TAILQ_EMPTY(&assignments)) {
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assign = TAILQ_FIRST(&assignments);
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FREE(assign->windowclass_title);
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TAILQ_REMOVE(&assignments, assign, assignments);
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FREE(assign);
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}
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/* Clear workspace names */
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Workspace *ws;
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TAILQ_FOREACH(ws, workspaces, workspaces)
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workspace_set_name(ws, NULL);
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}
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SLIST_INIT(&modes);
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struct Mode *default_mode = scalloc(sizeof(struct Mode));
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default_mode->name = sstrdup("default");
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default_mode->bindings = scalloc(sizeof(struct bindings_head));
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TAILQ_INIT(default_mode->bindings);
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SLIST_INSERT_HEAD(&modes, default_mode, modes);
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bindings = default_mode->bindings;
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#define REQUIRED_OPTION(name) \
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if (config.name == NULL) \
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die("You did not specify required configuration option " #name "\n");
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/* Clear the old config or initialize the data structure */
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memset(&config, 0, sizeof(config));
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/* Initialize default colors */
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#define INIT_COLOR(x, cborder, cbackground, ctext) \
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do { \
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x.border = get_colorpixel(conn, cborder); \
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x.background = get_colorpixel(conn, cbackground); \
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x.text = get_colorpixel(conn, ctext); \
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} while (0)
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config.client.background = get_colorpixel(conn, "#000000");
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INIT_COLOR(config.client.focused, "#4c7899", "#285577", "#ffffff");
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INIT_COLOR(config.client.focused_inactive, "#333333", "#5f676a", "#ffffff");
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INIT_COLOR(config.client.unfocused, "#333333", "#222222", "#888888");
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INIT_COLOR(config.client.urgent, "#2f343a", "#900000", "#ffffff");
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INIT_COLOR(config.bar.focused, "#4c7899", "#285577", "#ffffff");
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INIT_COLOR(config.bar.unfocused, "#333333", "#222222", "#888888");
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INIT_COLOR(config.bar.urgent, "#2f343a", "#900000", "#ffffff");
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parse_configuration(override_configpath);
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if (reload) {
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translate_keysyms();
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grab_all_keys(conn, false);
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}
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REQUIRED_OPTION(font);
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/* Set an empty name for every workspace which got no name */
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Workspace *ws;
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TAILQ_FOREACH(ws, workspaces, workspaces) {
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if (ws->name != NULL) {
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/* If the font was not specified when the workspace name
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* was loaded, we need to predict the text width now */
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if (ws->text_width == 0)
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ws->text_width = predict_text_width(global_conn,
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config.font, ws->name, ws->name_len);
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continue;
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}
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workspace_set_name(ws, NULL);
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}
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}
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