obt/keyboard.c (raw)
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/* -*- indent-tabs-mode: nil; tab-width: 4; c-basic-offset: 4; -*- obt/keyboard.c for the Openbox window manager Copyright (c) 2007 Dana Jansens This program 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. See the COPYING file for a copy of the GNU General Public License. */ #include "obt/display.h" #include "obt/keyboard.h" #include <X11/Xlib.h> #include <X11/keysym.h> struct _ObtIC { guint ref; XIC xic; }; /* These masks are constants and the modifier keys are bound to them as anyone sees fit: ShiftMask (1<<0), LockMask (1<<1), ControlMask (1<<2), Mod1Mask (1<<3), Mod2Mask (1<<4), Mod3Mask (1<<5), Mod4Mask (1<<6), Mod5Mask (1<<7) */ #define NUM_MASKS 8 #define ALL_MASKS 0xff /* an or'ing of all 8 keyboard masks */ /* Get the bitflag for the n'th modifier mask */ #define nth_mask(n) (1 << n) static void set_modkey_mask(guchar mask, KeySym sym); static void xim_init(void); void obt_keyboard_shutdown(); static XModifierKeymap *modmap; static KeySym *keymap; static gint min_keycode, max_keycode, keysyms_per_keycode; /* This is a bitmask of the different masks for each modifier key */ static guchar modkeys_keys[OBT_KEYBOARD_NUM_MODKEYS]; static gboolean alt_l = FALSE; static gboolean meta_l = FALSE; static gboolean super_l = FALSE; static gboolean hyper_l = FALSE; static gboolean started = FALSE; static XIM xim = NULL; static XIMStyle xim_style = 0; void obt_keyboard_reload(void) { gint i, j, k; if (started) obt_keyboard_shutdown(); /* free stuff */ started = TRUE; xim_init(); /* reset the keys to not be bound to any masks */ for (i = 0; i < OBT_KEYBOARD_NUM_MODKEYS; ++i) modkeys_keys[i] = 0; modmap = XGetModifierMapping(obt_display); /* note: modmap->max_keypermod can be 0 when there is no valid key layout available */ XDisplayKeycodes(obt_display, &min_keycode, &max_keycode); keymap = XGetKeyboardMapping(obt_display, min_keycode, max_keycode - min_keycode + 1, &keysyms_per_keycode); alt_l = meta_l = super_l = hyper_l = FALSE; /* go through each of the modifier masks (eg ShiftMask, CapsMask...) */ for (i = 0; i < NUM_MASKS; ++i) { /* go through each keycode that is bound to the mask */ for (j = 0; j < modmap->max_keypermod; ++j) { KeySym sym; /* get a keycode that is bound to the mask (i) */ KeyCode keycode = modmap->modifiermap[i*modmap->max_keypermod + j]; if (keycode) { /* go through each keysym bound to the given keycode */ for (k = 0; k < keysyms_per_keycode; ++k) { sym = keymap[(keycode-min_keycode) * keysyms_per_keycode + k]; if (sym != NoSymbol) { /* bind the key to the mask (e.g. Alt_L => Mod1Mask) */ set_modkey_mask(nth_mask(i), sym); } } } } } /* CapsLock, Shift, and Control are special and hard-coded */ modkeys_keys[OBT_KEYBOARD_MODKEY_CAPSLOCK] = LockMask; modkeys_keys[OBT_KEYBOARD_MODKEY_SHIFT] = ShiftMask; modkeys_keys[OBT_KEYBOARD_MODKEY_CONTROL] = ControlMask; } void obt_keyboard_shutdown(void) { XFreeModifiermap(modmap); modmap = NULL; XFree(keymap); keymap = NULL; if (xim) XCloseIM(xim); xim = NULL; xim_style = 0; started = FALSE; } void xim_init(void) { gchar *aname, *aclass; aname = g_strdup(g_get_prgname()); if (!aname) aname = g_strdup("obt"); aclass = g_strdup(aname); if (g_ascii_islower(aclass[0])) aclass[0] = g_ascii_toupper(aclass[0]); g_print("Opening Input Method for %s %s\n", aname, aclass); xim = XOpenIM(obt_display, NULL, aname, aclass); if (!xim) g_message("Failed to open an Input Method"); else { XIMStyles *xim_styles = NULL; char *r; /* get the input method styles */ r = XGetIMValues(xim, XNQueryInputStyle, &xim_styles, NULL); if (r || !xim_styles) g_message("Input Method does not support any styles"); if (xim_styles) { int i; /* find a style that doesnt need preedit or status */ for (i = 0; i < xim_styles->count_styles; ++i) { if (xim_styles->supported_styles[i] == (XIMPreeditNothing | XIMStatusNothing)) { xim_style = xim_styles->supported_styles[i]; break; } } XFree(xim_styles); } if (!xim_style) { g_message("Input Method does not support a usable style"); XCloseIM(xim); xim = NULL; } } g_free(aclass); g_free(aname); } guint obt_keyboard_keycode_to_modmask(guint keycode) { gint i, j; guint mask = 0; if (keycode == NoSymbol) return 0; /* go through each of the modifier masks (eg ShiftMask, CapsMask...) */ for (i = 0; i < NUM_MASKS; ++i) { /* go through each keycode that is bound to the mask */ for (j = 0; j < modmap->max_keypermod; ++j) { /* compare with a keycode that is bound to the mask (i) */ if (modmap->modifiermap[i*modmap->max_keypermod + j] == keycode) mask |= nth_mask(i); } } return mask; } guint obt_keyboard_only_modmasks(guint mask) { mask &= ALL_MASKS; /* strip off these lock keys. they shouldn't affect key bindings */ mask &= ~LockMask; /* use the LockMask, not what capslock is bound to, because you could bind it to something else and it should work as that modifier then. i think capslock is weird in xkb. */ mask &= ~obt_keyboard_modkey_to_modmask(OBT_KEYBOARD_MODKEY_NUMLOCK); mask &= ~obt_keyboard_modkey_to_modmask(OBT_KEYBOARD_MODKEY_SCROLLLOCK); return mask; } guint obt_keyboard_modkey_to_modmask(ObtModkeysKey key) { return modkeys_keys[key]; } static void set_modkey_mask(guchar mask, KeySym sym) { /* find what key this is, and bind it to the mask */ if (sym == XK_Num_Lock) modkeys_keys[OBT_KEYBOARD_MODKEY_NUMLOCK] |= mask; else if (sym == XK_Scroll_Lock) modkeys_keys[OBT_KEYBOARD_MODKEY_SCROLLLOCK] |= mask; else if (sym == XK_Super_L && super_l) modkeys_keys[OBT_KEYBOARD_MODKEY_SUPER] |= mask; else if (sym == XK_Super_L && !super_l) /* left takes precident over right, so erase any masks the right key may have set */ modkeys_keys[OBT_KEYBOARD_MODKEY_SUPER] = mask, super_l = TRUE; else if (sym == XK_Super_R && !super_l) modkeys_keys[OBT_KEYBOARD_MODKEY_SUPER] |= mask; else if (sym == XK_Hyper_L && hyper_l) modkeys_keys[OBT_KEYBOARD_MODKEY_HYPER] |= mask; else if (sym == XK_Hyper_L && !hyper_l) modkeys_keys[OBT_KEYBOARD_MODKEY_HYPER] = mask, hyper_l = TRUE; else if (sym == XK_Hyper_R && !hyper_l) modkeys_keys[OBT_KEYBOARD_MODKEY_HYPER] |= mask; else if (sym == XK_Alt_L && alt_l) modkeys_keys[OBT_KEYBOARD_MODKEY_ALT] |= mask; else if (sym == XK_Alt_L && !alt_l) modkeys_keys[OBT_KEYBOARD_MODKEY_ALT] = mask, alt_l = TRUE; else if (sym == XK_Alt_R && !alt_l) modkeys_keys[OBT_KEYBOARD_MODKEY_ALT] |= mask; else if (sym == XK_Meta_L && meta_l) modkeys_keys[OBT_KEYBOARD_MODKEY_META] |= mask; else if (sym == XK_Meta_L && !meta_l) modkeys_keys[OBT_KEYBOARD_MODKEY_META] = mask, meta_l = TRUE; else if (sym == XK_Meta_R && !meta_l) modkeys_keys[OBT_KEYBOARD_MODKEY_META] |= mask; /* CapsLock, Shift, and Control are special and hard-coded */ } KeyCode* obt_keyboard_keysym_to_keycode(KeySym sym) { KeyCode *ret; gint i, j, n; ret = g_new(KeyCode, 1); n = 0; ret[n] = 0; /* go through each keycode and look for the keysym */ for (i = min_keycode; i <= max_keycode; ++i) for (j = 0; j < keysyms_per_keycode; ++j) if (sym == keymap[(i-min_keycode) * keysyms_per_keycode + j]) { ret = g_renew(KeyCode, ret, ++n); ret[n-1] = i; ret[n] = 0; } return ret; } gchar *obt_keyboard_keycode_to_string(guint keycode) { KeySym sym; if ((sym = XKeycodeToKeysym(obt_display, keycode, 0)) != NoSymbol) return g_locale_to_utf8(XKeysymToString(sym), -1, NULL, NULL, NULL); return NULL; } gunichar obt_keyboard_keycode_to_unichar(guint keycode) { gunichar unikey = 0; char *key; if ((key = obt_keyboard_keycode_to_string(keycode)) != NULL && /* don't accept keys that aren't a single letter, like "space" */ key[1] == '\0') { unikey = g_utf8_get_char_validated(key, -1); if (unikey == (gunichar)-1 || unikey == (gunichar)-2 || unikey == 0) unikey = 0; } g_free(key); return unikey; } ObtIC* obt_keyboard_context_new(Window w) { ObtIC *ic = NULL; if (w != None) { ic = g_new(ObtIC, 1); ic->ref = 1; ic->xic = NULL; if (xim) ic->xic = XCreateIC(xim, XNInputStyle, xim_style, XNClientWindow, w, XNFocusWindow, w, NULL); } return ic; } void obt_keyboard_context_ref(ObtIC *ic) { ++ic->ref; } void obt_keyboard_context_unref(ObtIC *ic) { if (--ic->ref < 1) { XDestroyIC(ic->xic); g_free(ic); } } |