minui: add support for virtual keys
Change-Id: Ie0e75a2fbccd42993a2f7c3d42ba38afea2d7679
This commit is contained in:
Christopher Lais
parent
9acb022ab8
commit
ac731c88e3
256
minui/events.c
256
minui/events.c
@ -19,16 +19,141 @@
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#include <fcntl.h>
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#include <dirent.h>
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#include <sys/poll.h>
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#include <limits.h>
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#include <linux/input.h>
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#include "../common.h"
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#include "minui.h"
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#define MAX_DEVICES 16
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enum {
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DOWN_NOT,
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DOWN_SENT,
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DOWN_RELEASED,
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};
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struct virtualkey {
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int scancode;
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int centerx, centery;
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int width, height;
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};
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struct position {
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int x, y;
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int synced;
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struct input_absinfo xi, yi;
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};
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struct ev {
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struct pollfd *fd;
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struct virtualkey *vks;
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int vk_count;
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struct position p, mt_p;
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int down;
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};
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static struct pollfd ev_fds[MAX_DEVICES];
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static struct ev evs[MAX_DEVICES];
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static unsigned ev_count = 0;
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static inline int ABS(int x) {
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return x<0?-x:x;
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}
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/* Returns empty tokens */
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static char *vk_strtok_r(char *str, const char *delim, char **save_str)
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{
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if(!str) {
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if(!*save_str) return NULL;
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str = (*save_str) + 1;
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}
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*save_str = strpbrk(str, delim);
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if(*save_str) **save_str = '\0';
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return str;
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}
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static int vk_init(struct ev *e)
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{
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char vk_path[PATH_MAX] = "/sys/board_properties/virtualkeys.";
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char vks[2048], *ts;
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ssize_t len;
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int vk_fd;
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int i;
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e->vk_count = 0;
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len = strlen(vk_path);
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len = ioctl(e->fd->fd, EVIOCGNAME(sizeof(vk_path) - len), vk_path + len);
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if (len <= 0)
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return -1;
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vk_fd = open(vk_path, O_RDONLY);
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if (vk_fd < 0)
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return -1;
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len = read(vk_fd, vks, sizeof(vks)-1);
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close(vk_fd);
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if (len <= 0)
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return -1;
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vks[len] = '\0';
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/* Parse a line like:
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keytype:keycode:centerx:centery:width:height:keytype2:keycode2:centerx2:...
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*/
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for (ts = vks, e->vk_count = 1; *ts; ++ts) {
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if (*ts == ':')
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++e->vk_count;
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}
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if (e->vk_count % 6) {
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LOGW("minui: %s is %d %% 6\n", vk_path, e->vk_count % 6);
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}
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e->vk_count /= 6;
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if (e->vk_count <= 0)
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return -1;
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e->down = DOWN_NOT;
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ioctl(e->fd->fd, EVIOCGABS(ABS_X), &e->p.xi);
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ioctl(e->fd->fd, EVIOCGABS(ABS_Y), &e->p.yi);
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e->p.synced = 0;
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ioctl(e->fd->fd, EVIOCGABS(ABS_MT_POSITION_X), &e->mt_p.xi);
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ioctl(e->fd->fd, EVIOCGABS(ABS_MT_POSITION_Y), &e->mt_p.yi);
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e->mt_p.synced = 0;
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e->vks = malloc(sizeof(*e->vks) * e->vk_count);
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for (i = 0; i < e->vk_count; ++i) {
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char *token[6];
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int j;
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for (j = 0; j < 6; ++j) {
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token[j] = vk_strtok_r((i||j)?NULL:vks, ":", &ts);
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}
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if (strcmp(token[0], "0x01") != 0) {
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/* Java does string compare, so we do too. */
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LOGW("minui: %s: ignoring unknown virtual key type %s\n", vk_path, token[0]);
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continue;
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}
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e->vks[i].scancode = strtol(token[1], NULL, 0);
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e->vks[i].centerx = strtol(token[2], NULL, 0);
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e->vks[i].centery = strtol(token[3], NULL, 0);
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e->vks[i].width = strtol(token[4], NULL, 0);
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e->vks[i].height = strtol(token[5], NULL, 0);
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}
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return 0;
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}
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int ev_init(void)
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{
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DIR *dir;
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@ -45,6 +170,11 @@ int ev_init(void)
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ev_fds[ev_count].fd = fd;
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ev_fds[ev_count].events = POLLIN;
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evs[ev_count].fd = &ev_fds[ev_count];
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/* Load virtualkeys if there are any */
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vk_init(&evs[ev_count]);
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ev_count++;
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if(ev_count == MAX_DEVICES) break;
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}
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@ -55,11 +185,128 @@ int ev_init(void)
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void ev_exit(void)
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{
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while (ev_count > 0) {
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close(ev_fds[--ev_count].fd);
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while (ev_count-- > 0) {
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if (evs[ev_count].vk_count) {
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free(evs[ev_count].vks);
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evs[ev_count].vk_count = 0;
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}
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close(ev_fds[ev_count].fd);
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}
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}
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static int vk_inside_display(__s32 value, struct input_absinfo *info, int screen_size)
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{
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int screen_pos;
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if (info->minimum == info->maximum)
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return 0;
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screen_pos = (value - info->minimum) * (screen_size - 1) / (info->maximum - info->minimum);
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return (screen_pos >= 0 && screen_pos < screen_size);
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}
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static int vk_tp_to_screen(struct position *p, int *x, int *y)
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{
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if (p->xi.minimum == p->xi.maximum || p->yi.minimum == p->yi.maximum)
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return 0;
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*x = (p->x - p->xi.minimum) * (gr_fb_width() - 1) / (p->xi.maximum - p->xi.minimum);
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*y = (p->y - p->yi.minimum) * (gr_fb_height() - 1) / (p->yi.maximum - p->yi.minimum);
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if (*x >= 0 && *x < gr_fb_width() &&
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*y >= 0 && *y < gr_fb_height()) {
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return 0;
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}
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return 1;
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}
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/* Translate a virtual key in to a real key event, if needed */
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/* Returns non-zero when the event should be consumed */
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static int vk_modify(struct ev *e, struct input_event *ev)
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{
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int i;
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int x, y;
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if (ev->type == EV_KEY) {
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if (ev->code == BTN_TOUCH && !ev->value)
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e->down = DOWN_RELEASED;
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return 0;
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}
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if (ev->type == EV_ABS) {
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switch (ev->code) {
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case ABS_X:
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e->p.synced = 1;
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e->p.x = ev->value;
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return !vk_inside_display(e->p.x, &e->p.xi, gr_fb_width());
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case ABS_Y:
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e->p.synced = 1;
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e->p.y = ev->value;
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return !vk_inside_display(e->p.y, &e->p.yi, gr_fb_height());
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case ABS_MT_POSITION_X:
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if (e->mt_p.synced & 2) return 1;
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e->mt_p.synced = 1;
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e->mt_p.x = ev->value;
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return !vk_inside_display(e->mt_p.x, &e->mt_p.xi, gr_fb_width());
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case ABS_MT_POSITION_Y:
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if (e->mt_p.synced & 2) return 1;
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e->mt_p.synced = 1;
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e->mt_p.y = ev->value;
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return !vk_inside_display(e->mt_p.y, &e->mt_p.yi, gr_fb_height());
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case ABS_MT_TOUCH_MAJOR:
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if (e->mt_p.synced & 2) return 1;
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if (!ev->value) e->down = DOWN_RELEASED;
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return 0;
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}
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return 0;
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}
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if (ev->type != EV_SYN)
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return 0;
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if (ev->code == SYN_MT_REPORT) {
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/* Ignore the rest of the points */
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e->mt_p.synced |= 2;
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return 0;
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}
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if (ev->code != SYN_REPORT)
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return 0;
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if (e->down == DOWN_RELEASED) {
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e->down = DOWN_NOT;
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/* TODO: Send emulated key release? */
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return 1;
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}
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if (!(e->p.synced && vk_tp_to_screen(&e->p, &x, &y)) &&
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!((e->mt_p.synced & 1) && vk_tp_to_screen(&e->mt_p, &x, &y))) {
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return 0;
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}
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e->p.synced = e->mt_p.synced = 0;
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if (e->down)
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return 1;
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for (i = 0; i < e->vk_count; ++i) {
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int xd = ABS(e->vks[i].centerx - x);
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int yd = ABS(e->vks[i].centery - y);
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if (xd < e->vks[i].width/2 && yd < e->vks[i].height/2) {
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/* Fake a key event */
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e->down = DOWN_SENT;
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ev->type = EV_KEY;
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ev->code = e->vks[i].scancode;
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ev->value = 1;
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return 0;
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}
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}
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return 1;
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}
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int ev_get(struct input_event *ev, unsigned dont_wait)
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{
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int r;
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@ -72,7 +319,10 @@ int ev_get(struct input_event *ev, unsigned dont_wait)
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for(n = 0; n < ev_count; n++) {
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if(ev_fds[n].revents & POLLIN) {
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r = read(ev_fds[n].fd, ev, sizeof(*ev));
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if(r == sizeof(*ev)) return 0;
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if(r == sizeof(*ev)) {
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if (!vk_modify(&evs[n], ev))
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return 0;
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}
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}
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}
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}
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