pandory500/SDL-mirror
2
0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

SDL_TEXTINPUT support for EVDEV

Browse source
This commit is contained in:
Gabriel Jacobo 2013-10-03 10:28:10 -03:00
parent 201fa56aaa
commit 7b5e9e302b
8 changed files with 224 additions and 22 deletions
Download patch file Download diff file Expand all files Collapse all files

129
src/input/evdev/SDL_evdev.c
View file

@ -39,7 +39,11 @@ static _THIS = NULL;
#include <fcntl.h>
#include <sys/ioctl.h>
#include <limits.h> /* For the definition of PATH_MAX */
#include <linux/input.h>
#ifdef SDL_INPUT_LINUXKD
#include <linux/kd.h>
#include <linux/keyboard.h>
#endif
#include "SDL.h"
#include "SDL_assert.h"
@ -325,12 +329,54 @@ static Uint8 EVDEV_MouseButtons[] = {
SDL_BUTTON_X2 + 3 /* BTN_TASK 0x117 */
};
static char* EVDEV_consoles[] = {
"/proc/self/fd/0",
"/dev/tty",
"/dev/tty0",
"/dev/tty1",
"/dev/tty2",
"/dev/tty3",
"/dev/tty4",
"/dev/tty5",
"/dev/tty6",
"/dev/vc/0",
"/dev/console"
};
#define IS_CONSOLE(fd) isatty (fd) && ioctl(fd, KDGKBTYPE, &arg) == 0 && ((arg == KB_101) || (arg == KB_84))
static int SDL_EVDEV_get_console_fd(void)
{
int fd, i;
char arg = 0;
/* Try a few consoles to see which one we have read access to */
for( i = 0; i < SDL_arraysize(EVDEV_consoles); i++) {
fd = open(EVDEV_consoles[i], O_RDONLY);
if (fd >= 0) {
if (IS_CONSOLE(fd)) return fd;
close(fd);
}
}
/* Try stdin, stdout, stderr */
for( fd = 0; fd < 3; fd++) {
if (IS_CONSOLE(fd)) return fd;
}
/* We won't be able to send SDL_TEXTINPUT events */
return -1;
}
int
SDL_EVDEV_Init(void)
{
int retval = 0;
if (_this == NULL) {
_this = (SDL_EVDEV_PrivateData *) SDL_calloc(1, sizeof(*_this));
if(_this == NULL) {
return SDL_OutOfMemory();
@ -354,6 +400,9 @@ SDL_EVDEV_Init(void)
#else
/* TODO: Scan the devices manually, like a caveman */
#endif /* SDL_USE_LIBUDEV */
/* We need a physical terminal (not PTS) to be able to translate key code to symbols via the kernel tables */
_this->console_fd = SDL_EVDEV_get_console_fd();
}
@ -378,6 +427,9 @@ SDL_EVDEV_Quit(void)
SDL_UDEV_Quit();
#endif /* SDL_USE_LIBUDEV */
if (_this->console_fd >= 0) {
close(_this->console_fd);
}
/* Remove existing devices */
while(_this->first != NULL) {
SDL_EVDEV_device_removed(_this->first->path);
@ -443,11 +495,18 @@ SDL_EVDEV_Poll(void)
SDL_Scancode scan_code;
int mouse_button;
SDL_Mouse *mouse;
#ifdef SDL_INPUT_LINUXKD
Uint16 modstate;
struct kbentry kbe;
static char keysym[8];
char *end;
Uint32 kval;
#endif
#if SDL_USE_LIBUDEV
SDL_UDEV_Poll();
#endif
for (item = _this->first; item != NULL; item = item->next) {
while ((len = read(item->fd, events, (sizeof events))) > 0) {
len /= sizeof(events[0]);
@ -455,20 +514,57 @@ SDL_EVDEV_Poll(void)
switch(item->devclass) {
case SDL_EVDEV_DEVICE_KEYBOARD:
switch (events[i].type) {
case EV_KEY:
scan_code = SDL_EVDEV_translate_keycode(events[i].code);
if (scan_code != SDL_SCANCODE_UNKNOWN) {
if (events[i].value == 0) {
SDL_SendKeyboardKey(SDL_RELEASED, scan_code);
}
else if (events[i].value == 1) {
SDL_SendKeyboardKey(SDL_PRESSED, scan_code);
}
else if (events[i].value == 2) {
/* Key repeated */
SDL_SendKeyboardKey(SDL_PRESSED, scan_code);
}
case EV_KEY:
scan_code = SDL_EVDEV_translate_keycode(events[i].code);
if (scan_code != SDL_SCANCODE_UNKNOWN) {
if (events[i].value == 0) {
SDL_SendKeyboardKey(SDL_RELEASED, scan_code);
}
else if (events[i].value == 1 || events[i].value == 2 /* Key repeated */ ) {
SDL_SendKeyboardKey(SDL_PRESSED, scan_code);
#ifdef SDL_INPUT_LINUXKD
if (_this->console_fd >= 0) {
kbe.kb_index = events[i].code;
/* Convert the key to an UTF-8 char */
/* Ref: http://www.linuxjournal.com/article/2783 */
modstate = SDL_GetModState();
kbe.kb_table = 0;
/* Ref: http://graphics.stanford.edu/~seander/bithacks.html#ConditionalSetOrClearBitsWithoutBranching */
kbe.kb_table |= -( (modstate & KMOD_LCTRL) != 0) & (1 << KG_CTRLL | 1 << KG_CTRL);
kbe.kb_table |= -( (modstate & KMOD_RCTRL) != 0) & (1 << KG_CTRLR | 1 << KG_CTRL);
kbe.kb_table |= -( (modstate & KMOD_LSHIFT) != 0) & (1 << KG_SHIFTL | 1 << KG_SHIFT);
kbe.kb_table |= -( (modstate & KMOD_RSHIFT) != 0) & (1 << KG_SHIFTR | 1 << KG_SHIFT);
kbe.kb_table |= -( (modstate & KMOD_LALT) != 0) & (1 << KG_ALT);
kbe.kb_table |= -( (modstate & KMOD_RALT) != 0) & (1 << KG_ALTGR);
if(ioctl(_this->console_fd, KDGKBENT, (unsigned long)&kbe) == 0 &&
( (KTYP(kbe.kb_value) == KT_LATIN) || (KTYP(kbe.kb_value) == KT_ASCII) || (KTYP(kbe.kb_value) == KT_LETTER) ))
{
kval = KVAL(kbe.kb_value);
/* While there's a KG_CAPSSHIFT symbol, it's not useful to build the table index with it
* because 1 << KG_CAPSSHIFT overflows the 8 bits of kb_table
* So, we do the CAPS LOCK logic here. Note that isalpha depends on the locale!
*/
if ( modstate & KMOD_CAPS && isalpha(kval) ) {
if ( isupper(kval) ) {
kval = tolower(kval);
}
else {
kval = toupper(kval);
}
}
/* Convert to UTF-8 and send */
end = SDL_UCS4ToUTF8( kval, keysym);
*end = '\0';
SDL_SendKeyboardText(keysym);
}
}
#endif
}
}
break;
default:
@ -651,3 +747,4 @@ SDL_EVDEV_device_removed(const char *devpath)
#endif /* SDL_INPUT_LINUXEV */
/* vi: set ts=4 sw=4 expandtab: */