78 lines
2.4 KiB
C
78 lines
2.4 KiB
C
/*
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* vim:ts=4:sw=4:expandtab
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*
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* i3 - an improved dynamic tiling window manager
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* © 2009 Michael Stapelberg and contributors (see also: LICENSE)
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*
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*/
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#include "libi3.h"
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#include <stdint.h>
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#include <stdlib.h>
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#include <xcb/xcb.h>
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#include <xcb/xcb_keysyms.h>
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/*
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* All-in-one function which returns the modifier mask (XCB_MOD_MASK_*) for the
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* given keysymbol, for example for XCB_NUM_LOCK (usually configured to mod2).
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*
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* This function initiates one round-trip. Use get_mod_mask_for() directly if
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* you already have the modifier mapping and key symbols.
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*
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*/
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uint32_t aio_get_mod_mask_for(uint32_t keysym, xcb_key_symbols_t *symbols) {
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xcb_get_modifier_mapping_cookie_t cookie;
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xcb_get_modifier_mapping_reply_t *modmap_r;
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xcb_flush(conn);
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/* Get the current modifier mapping (this is blocking!) */
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cookie = xcb_get_modifier_mapping(conn);
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if (!(modmap_r = xcb_get_modifier_mapping_reply(conn, cookie, NULL)))
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return 0;
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uint32_t result = get_mod_mask_for(keysym, symbols, modmap_r);
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free(modmap_r);
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return result;
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}
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/*
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* Returns the modifier mask (XCB_MOD_MASK_*) for the given keysymbol, for
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* example for XCB_NUM_LOCK (usually configured to mod2).
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*
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* This function does not initiate any round-trips.
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*
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*/
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uint32_t get_mod_mask_for(uint32_t keysym,
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xcb_key_symbols_t *symbols,
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xcb_get_modifier_mapping_reply_t *modmap_reply) {
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xcb_keycode_t *codes, *modmap;
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xcb_keycode_t mod_code;
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modmap = xcb_get_modifier_mapping_keycodes(modmap_reply);
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/* Get the list of keycodes for the given symbol */
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if (!(codes = xcb_key_symbols_get_keycode(symbols, keysym)))
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return 0;
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/* Loop through all modifiers (Mod1-Mod5, Shift, Control, Lock) */
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for (int mod = 0; mod < 8; mod++)
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for (int j = 0; j < modmap_reply->keycodes_per_modifier; j++) {
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/* Store the current keycode (for modifier 'mod') */
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mod_code = modmap[(mod * modmap_reply->keycodes_per_modifier) + j];
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/* Check if that keycode is in the list of previously resolved
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* keycodes for our symbol. If so, return the modifier mask. */
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for (xcb_keycode_t *code = codes; *code; code++) {
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if (*code != mod_code)
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continue;
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free(codes);
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/* This corresponds to the XCB_MOD_MASK_* constants */
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return (1 << mod);
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}
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}
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return 0;
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}
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