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John Sullivan
2020-09-11 01:25:28 -07:00
commit 590b75b23a
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keyboard.h Normal file
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/* clang-format off */
#define KBD_POINTS KBD_ROWS * KBD_COLS
/* clang-format on */
enum key_type;
enum key_modifier_type;
struct clr_scheme;
struct key;
struct layout;
struct kbd;
enum key_type {
Pad = 0,
Code,
Mod,
Layout,
Last,
};
/* Modifiers passed to the virtual_keyboard protocol. They are based on
* wayland's wl_keyboard, which doesn't document them.
*/
enum key_modifier_type {
NoMod = 0,
Shift = 1,
CapsLock = 2,
Ctrl = 4,
Super = 64,
AltGr = 128,
};
struct clr_scheme {
Color fg;
Color bg;
Color high;
Color text;
};
struct key {
const char *label;
const char *shift_label;
const uint8_t width;
const enum key_type type;
const uint32_t code;
struct layout *layout;
uint8_t col, row;
};
struct layout {
struct key *keys;
struct key *gridpoints[KBD_POINTS];
};
struct kbd {
struct layout *layout;
struct clr_scheme scheme;
uint32_t w, h;
uint32_t kw, kh;
uint8_t mods;
struct key *last_press;
struct drwsurf *surf;
struct zwp_virtual_keyboard_v1 *vkbd;
};
static inline void draw_inset(struct drwsurf *d, uint32_t x, uint32_t y,
uint32_t width, uint32_t height, uint32_t border,
uint32_t color);
static void kbd_init_layout(struct layout *l);
static struct key *kbd_get_key(struct kbd *kb, uint32_t x, uint32_t y);
static void kbd_unpress_key(struct kbd *kb, uint32_t time);
static void kbd_press_key(struct kbd *kb, struct key *k, uint32_t time);
static void kbd_draw_key(struct kbd *kb, struct key *k, bool pressed);
static void kbd_draw_key(struct kbd *kb, struct key *k, bool pressed);
static void kbd_draw_layout(struct kbd *kb);
static void kbd_resize(struct kbd *kb, uint32_t w, uint32_t h);
void
kbd_init_layout(struct layout *l) {
uint8_t i = 0, width = 0, ncol = 0, col = 0, row = 0;
struct key *k = l->keys;
struct key **point = l->gridpoints,
**end_point = l->gridpoints + (KBD_POINTS);
memset(point, 0, sizeof(uint8_t) * KBD_POINTS);
while ((k->type != Last) && (point < end_point)) {
width = k->width;
ncol = col + width;
if (ncol > KBD_COLS) {
width = KBD_COLS - col;
col = 0;
row += 1;
for (i = 0; (i < width) && (point < end_point); i++, point++) {
}
continue;
}
k->col = col;
k->row = row;
col = ncol;
for (i = 0; (i < width) && (point < end_point); i++, point++) {
*point = k;
}
k++;
}
}
struct key *
kbd_get_key(struct kbd *kb, uint32_t x, uint32_t y) {
struct layout *l = kb->layout;
uint32_t col = KBD_COLS * ((float)x / (float)kb->w);
uint32_t row = KBD_ROWS * ((float)y / (float)kb->h);
return l->gridpoints[(row * KBD_COLS) + col];
}
void
kbd_unpress_key(struct kbd *kb, uint32_t time) {
if (kb->last_press) {
kbd_draw_key(kb, kb->last_press, false);
kb->surf->dirty = true;
zwp_virtual_keyboard_v1_key(kb->vkbd, time, kb->last_press->code,
WL_KEYBOARD_KEY_STATE_RELEASED);
kb->last_press = NULL;
}
}
void
kbd_press_key(struct kbd *kb, struct key *k, uint32_t time) {
switch (k->type) {
case Code:
kb->last_press = k;
kbd_draw_key(kb, k, true);
zwp_virtual_keyboard_v1_key(kb->vkbd, time, kb->last_press->code,
WL_KEYBOARD_KEY_STATE_PRESSED);
break;
case Mod:
kb->mods ^= k->code;
if (k->code == Shift) {
kbd_draw_layout(kb);
}
kbd_draw_key(kb, k, kb->mods & k->code);
zwp_virtual_keyboard_v1_modifiers(kb->vkbd, kb->mods, 0, 0, 0);
break;
case Layout:
kb->layout = k->layout;
kbd_draw_layout(kb);
default:
break;
}
kb->surf->dirty = true;
}
void
kbd_draw_key(struct kbd *kb, struct key *k, bool pressed) {
struct drwsurf *d = kb->surf;
const char *label = (kb->mods & Shift) ? k->shift_label : k->label;
Color *fill = pressed ? &kb->scheme.high : &kb->scheme.fg;
uint32_t x = k->col * kb->kw, y = k->row * kb->kh, width = k->width * kb->kw;
draw_inset(d, x, y, width, kb->kh, KBD_KEY_BORDER, fill->color);
wld_draw_text(d->render, d->ctx->font, kb->scheme.text.color,
x + (width * 0.35), y + (kb->kh / 2), label, -1, NULL);
}
void
kbd_draw_layout(struct kbd *kb) {
struct drwsurf *d = kb->surf;
struct key *next_key = kb->layout->keys;
bool pressed = false;
wld_fill_rectangle(d->render, kb->scheme.bg.color, 0, 0, kb->w, kb->h);
while (next_key->type != Last) {
if (next_key->type == Pad) {
next_key++;
continue;
}
pressed = next_key->type == Mod && kb->mods & next_key->code;
kbd_draw_key(kb, next_key, pressed);
next_key++;
}
}
void
kbd_resize(struct kbd *kb, uint32_t w, uint32_t h) {
struct drwsurf *d = kb->surf;
kb->w = w;
kb->h = h;
kb->kw = (float)w / (float)KBD_COLS;
kb->kh = (float)h / (float)KBD_ROWS;
drwsurf_resize(d, w, h);
kbd_draw_layout(kb);
d->dirty = true;
}
void
draw_inset(struct drwsurf *d, uint32_t x, uint32_t y, uint32_t width,
uint32_t height, uint32_t border, uint32_t color) {
wld_fill_rectangle(d->render, color, x + border, y + border, width - border,
height - border);
}