HGKeeper

* GNT - The GLib Ncurses Toolkit

* GNT is the legal property of its developers, whose names are too numerous

* to list here. Please refer to the COPYRIGHT file distributed with this

* source distribution.

* This library is free software; you can redistribute it and/or modify

* it under the terms of the GNU General Public License as published by

* the Free Software Foundation; either version 2 of the License, or

* (at your option) any later version.

* This program is distributed in the hope that it will be useful,

* but WITHOUT ANY WARRANTY; without even the implied warranty of

* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

* GNU General Public License for more details.

* You should have received a copy of the GNU General Public License along with

* this program; if not, write to the Free Software Foundation, Inc.,

* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.

#include "gntinternal.h"

#undef GNT_LOG_DOMAIN

#define GNT_LOG_DOMAIN "Keys"

#include "gntkeys.h"

#include <glib.h>

#include <stdlib.h>

#include <string.h>

char *gnt_key_cup;

char *gnt_key_cdown;

char *gnt_key_cleft;

char *gnt_key_cright;

static const char *term;

static GHashTable *specials;

void gnt_init_keys()

{

const char *controls[] = {"", "c-", "ctrl-", "ctr-", "ctl-", NULL};

const char *alts[] = {"", "alt-", "a-", "m-", "meta-", NULL};

int c, a, ch;

char key[32];

if (term == NULL) {

term = getenv("TERM");

if (!term)

term = ""; /* Just in case */

}

#ifdef _WIN32

gnt_key_cup = GNT_KEY_CTRL_UP;

gnt_key_cdown = GNT_KEY_CTRL_DOWN;

gnt_key_cright = GNT_KEY_CTRL_RIGHT;

gnt_key_cleft = GNT_KEY_CTRL_LEFT;

#else

if (strstr(term, "xterm") == term || strcmp(term, "rxvt") == 0) {

gnt_key_cup = "\033" "[1;5A";

gnt_key_cdown = "\033" "[1;5B";

gnt_key_cright = "\033" "[1;5C";

gnt_key_cleft = "\033" "[1;5D";

} else if (strstr(term, "screen") == term || strcmp(term, "rxvt-unicode") == 0) {

gnt_key_cup = "\033" "Oa";

gnt_key_cdown = "\033" "Ob";

gnt_key_cright = "\033" "Oc";

gnt_key_cleft = "\033" "Od";

}

#endif

specials = g_hash_table_new(g_str_hash, g_str_equal);

#define INSERT_KEY(k, code) do { \

g_hash_table_insert(specials, g_strdup(k), g_strdup(code)); \

gnt_keys_add_combination(code); \

} while (0)

INSERT_KEY("home", GNT_KEY_HOME);

INSERT_KEY("end", GNT_KEY_END);

INSERT_KEY("pageup", GNT_KEY_PGUP);

INSERT_KEY("pagedown", GNT_KEY_PGDOWN);

INSERT_KEY("insert", GNT_KEY_INS);

INSERT_KEY("delete", GNT_KEY_DEL);

INSERT_KEY("back_tab", GNT_KEY_BACK_TAB);

INSERT_KEY("left", GNT_KEY_LEFT);

INSERT_KEY("right", GNT_KEY_RIGHT);

INSERT_KEY("up", GNT_KEY_UP);

INSERT_KEY("down", GNT_KEY_DOWN);

INSERT_KEY("tab", "\t");

INSERT_KEY("escape", "\033");

INSERT_KEY("space", " ");

INSERT_KEY("return", GNT_KEY_ENTER);

INSERT_KEY("menu", GNT_KEY_POPUP);

INSERT_KEY("f1", GNT_KEY_F1);

INSERT_KEY("f2", GNT_KEY_F2);

INSERT_KEY("f3", GNT_KEY_F3);

INSERT_KEY("f4", GNT_KEY_F4);

INSERT_KEY("f5", GNT_KEY_F5);

INSERT_KEY("f6", GNT_KEY_F6);

INSERT_KEY("f7", GNT_KEY_F7);

INSERT_KEY("f8", GNT_KEY_F8);

INSERT_KEY("f9", GNT_KEY_F9);

INSERT_KEY("f10", GNT_KEY_F10);

INSERT_KEY("f11", GNT_KEY_F11);

INSERT_KEY("f12", GNT_KEY_F12);

#define REM_LENGTH (sizeof(key) - (cur - key))

#define INSERT_COMB(k, code) do { \

snprintf(key, sizeof(key), "%s%s%s", controls[c], alts[a], k); \

INSERT_KEY(key, code); \

} while (0)

#define INSERT_COMB_CODE(k, c1, c2) do { \

char __[32]; \

snprintf(__, sizeof(__), "%s%s", c1, c2); \

INSERT_COMB(k, __); \

} while (0)

/* Lower-case alphabets */

for (a = 0, c = 0; controls[c]; c++, a = 0) {

if (c) {

INSERT_COMB("up", gnt_key_cup);

INSERT_COMB("down", gnt_key_cdown);

INSERT_COMB("left", gnt_key_cleft);

INSERT_COMB("right", gnt_key_cright);

}

for (a = 0; alts[a]; a++) {

for (ch = 0; ch < 26; ch++) {

char str[2] = {'a' + ch, 0}, code[4] = "\0\0\0\0";

int ind = 0;

if (a)

code[ind++] = '\033';

code[ind] = (c ? 1 : 'a') + ch;

INSERT_COMB(str, code);

}

if (c == 0 && a) {

INSERT_COMB("tab", "\033\t");

INSERT_COMB_CODE("up", "\033", GNT_KEY_UP);

INSERT_COMB_CODE("down", "\033", GNT_KEY_DOWN);

INSERT_COMB_CODE("left", "\033", GNT_KEY_LEFT);

INSERT_COMB_CODE("right", "\033", GNT_KEY_RIGHT);

}

c = 0;

for (a = 0; alts[a]; a++) { /* XXX: is that loop necessary? */

/* Upper-case alphabets */

for (ch = 0; ch < 26; ch++) {

char str[2] = {'A' + ch, 0}, code[] = {'\033', 'A' + ch, 0};

INSERT_COMB(str, code);

}

/* Digits */

for (ch = 0; ch < 10; ch++) {

char str[2] = {'0' + ch, 0}, code[] = {'\033', '0' + ch, 0};

INSERT_COMB(str, code);

}

void gnt_keys_refine(char *text)

{

while (*text == 27 && *(text + 1) == 27)

text++;

if (*text == 27 && *(text + 1) == '[' &&

(*(text + 2) >= 'A' && *(text + 2) <= 'D')) {

/* Apparently this is necessary for urxvt and screen and xterm */

if (strstr(term, "screen") == term || strcmp(term, "rxvt-unicode") == 0 ||

strstr(term, "xterm") == term ||

strstr(term, "vt100") == term)

*(text + 1) = 'O';

} else if (g_utf8_get_char(text) == 195) {

if (*(text + 2) == 0 && strstr(term, "xterm") == term) {

*(text) = 27;

*(text + 1) -= 64; /* Say wha? */

}

const char *gnt_key_translate(const char *name)

{

return name ? g_hash_table_lookup(specials, name) : NULL;

}

typedef struct {

const char *name;

const char *key;

} gntkey;

static void

get_key_name(gpointer key, gpointer value, gpointer data)

{

gntkey *k = data;

if (k->name)

return;

if (g_utf8_collate(value, k->key) == 0)

k->name = key;

}

const char *gnt_key_lookup(const char *key)

{

gntkey k = {NULL, key};

g_hash_table_foreach(specials, get_key_name, &k);

return k.name;

}

* The key-bindings will be saved in a tree. When a keystroke happens, GNT will

* find the sequence that matches a binding and return the length.

* A sequence should not be a prefix of another sequence. If it is, then only

* the shortest one will be processed. If we want to change that, we will need

* to allow getting the k-th prefix that matches the input, and pay attention

* to the return value of gnt_wm_process_input in gntmain.c.

#define SIZE 256

#define IS_END (1 << 0)

struct _node

{

struct _node *next[SIZE];

int ref;

int flags;

};

static struct _node root = {.ref = 1, .flags = 0};

static void add_path(struct _node *node, const char *path)

{

struct _node *n = NULL;

if (!path || !*path) {

node->flags |= IS_END;

return;

}

while (*path && node->next[(unsigned char)*path]) {

node = node->next[(unsigned char)*path];

node->ref++;

path++;

}

if (!*path)

return;

n = g_new0(struct _node, 1);

n->ref = 1;

node->next[(unsigned char)*path++] = n;

add_path(n, path);

}

void gnt_keys_add_combination(const char *path)

{

add_path(&root, path);

}

static void del_path(struct _node *node, const char *path)

{

struct _node *next = NULL;

if (!*path)

return;

next = node->next[(unsigned char)*path];

if (!next)

return;

del_path(next, path + 1);

next->ref--;

if (next->ref == 0) {

node->next[(unsigned char)*path] = NULL;

g_free(next);

}

void gnt_keys_del_combination(const char *path)

{

del_path(&root, path);

}

int gnt_keys_find_combination(const char *path)

{

int depth = 0;

struct _node *n = &root;

root.flags &= ~IS_END;

while (*path && n->next[(unsigned char)*path] && !(n->flags & IS_END)) {

if (!g_ascii_isspace(*path) &&

!g_ascii_iscntrl(*path) &&

!g_ascii_isgraph(*path))

return 0;

n = n->next[(unsigned char)*path++];

depth++;

}

if (!(n->flags & IS_END))

depth = 0;

return depth;

}

static void

print_path(struct _node *node, int depth)

{

int i;

for (i = 0; i < SIZE; i++) {

if (node->next[i]) {

g_printerr("%*c (%d:%d)\n", depth * 4, i, node->next[i]->ref,

node->next[i]->flags);

print_path(node->next[i], depth + 1);

}

/* this is purely for debugging purposes. */

void gnt_keys_print_combinations(void);

void gnt_keys_print_combinations()

{

g_printerr("--------\n");

print_path(&root, 1);

g_printerr("--------\n");

}

qulogic/libgnt