Move menu and rendering logic into separate files

This commit is contained in:
adnano 2024-02-27 11:23:12 -05:00
commit e8782db9c8
10 changed files with 1024 additions and 963 deletions

1030
main.c

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631
menu.c Normal file
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#define _POSIX_C_SOURCE 200809L
#include <ctype.h>
#include <poll.h>
#include <stdbool.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include <time.h>
#include <unistd.h>
#include <sys/mman.h>
#include <sys/timerfd.h>
#include <wayland-client.h>
#include <wayland-client-protocol.h>
#include <xkbcommon/xkbcommon.h>
#include "menu.h"
#include "pango.h"
#include "render.h"
static bool parse_color(const char *color, uint32_t *result) {
if (color[0] == '#') {
++color;
}
size_t len = strlen(color);
if ((len != 6 && len != 8) || !isxdigit(color[0]) || !isxdigit(color[1])) {
return false;
}
char *ptr;
uint32_t parsed = (uint32_t)strtoul(color, &ptr, 16);
if (*ptr != '\0') {
return false;
}
*result = len == 6 ? ((parsed << 8) | 0xFF) : parsed;
return true;
}
// Initialize the menu.
void menu_init(struct menu *menu, int argc, char *argv[]) {
menu->strncmp = strncmp;
menu->font = "monospace 10";
menu->background = 0x222222ff;
menu->foreground = 0xbbbbbbff;
menu->promptbg = 0x005577ff;
menu->promptfg = 0xeeeeeeff;
menu->selectionbg = 0x005577ff;
menu->selectionfg = 0xeeeeeeff;
const char *usage =
"Usage: wmenu [-biv] [-f font] [-l lines] [-o output] [-p prompt]\n"
"\t[-N color] [-n color] [-M color] [-m color] [-S color] [-s color]\n";
int opt;
while ((opt = getopt(argc, argv, "bhivf:l:o:p:N:n:M:m:S:s:")) != -1) {
switch (opt) {
case 'b':
menu->bottom = true;
break;
case 'i':
menu->strncmp = strncasecmp;
break;
case 'v':
puts("wmenu " VERSION);
exit(EXIT_SUCCESS);
case 'f':
menu->font = optarg;
break;
case 'l':
menu->lines = atoi(optarg);
break;
case 'o':
menu->output_name = optarg;
break;
case 'p':
menu->prompt = optarg;
break;
case 'N':
if (!parse_color(optarg, &menu->background)) {
fprintf(stderr, "Invalid background color: %s", optarg);
}
break;
case 'n':
if (!parse_color(optarg, &menu->foreground)) {
fprintf(stderr, "Invalid foreground color: %s", optarg);
}
break;
case 'M':
if (!parse_color(optarg, &menu->promptbg)) {
fprintf(stderr, "Invalid prompt background color: %s", optarg);
}
break;
case 'm':
if (!parse_color(optarg, &menu->promptfg)) {
fprintf(stderr, "Invalid prompt foreground color: %s", optarg);
}
break;
case 'S':
if (!parse_color(optarg, &menu->selectionbg)) {
fprintf(stderr, "Invalid selection background color: %s", optarg);
}
break;
case 's':
if (!parse_color(optarg, &menu->selectionfg)) {
fprintf(stderr, "Invalid selection foreground color: %s", optarg);
}
break;
default:
fprintf(stderr, "%s", usage);
exit(EXIT_FAILURE);
}
}
if (optind < argc) {
fprintf(stderr, "%s", usage);
exit(EXIT_FAILURE);
}
int height = get_font_height(menu->font);
menu->line_height = height + 3;
menu->height = menu->line_height;
if (menu->lines > 0) {
menu->height += menu->height * menu->lines;
}
menu->padding = height / 2;
}
static void append_page(struct page *page, struct page **first, struct page **last) {
if (*last) {
(*last)->next = page;
} else {
*first = page;
}
page->prev = *last;
page->next = NULL;
*last = page;
}
static void page_items(struct menu *menu) {
// Free existing pages
while (menu->pages != NULL) {
struct page *page = menu->pages;
menu->pages = menu->pages->next;
free(page);
}
if (!menu->matches) {
return;
}
// Make new pages
if (menu->lines > 0) {
struct page *pages_end = NULL;
struct item *item = menu->matches;
while (item) {
struct page *page = calloc(1, sizeof(struct page));
page->first = item;
for (int i = 1; item && i <= menu->lines; i++) {
item->page = page;
page->last = item;
item = item->next_match;
}
append_page(page, &menu->pages, &pages_end);
}
} else {
// Calculate available space
int max_width = menu->width - menu->inputw - menu->promptw
- menu->left_arrow - menu->right_arrow;
struct page *pages_end = NULL;
struct item *item = menu->matches;
while (item) {
struct page *page = calloc(1, sizeof(struct page));
page->first = item;
int total_width = 0;
while (item) {
total_width += item->width + 2 * menu->padding;
if (total_width > max_width) {
break;
}
item->page = page;
page->last = item;
item = item->next_match;
}
append_page(page, &menu->pages, &pages_end);
}
}
}
static const char *fstrstr(struct menu *menu, const char *s, const char *sub) {
for (size_t len = strlen(sub); *s; s++) {
if (!menu->strncmp(s, sub, len)) {
return s;
}
}
return NULL;
}
static void append_item(struct item *item, struct item **first, struct item **last) {
if (*last) {
(*last)->next_match = item;
} else {
*first = item;
}
item->prev_match = *last;
item->next_match = NULL;
*last = item;
}
static void match_items(struct menu *menu) {
struct item *lexact = NULL, *exactend = NULL;
struct item *lprefix = NULL, *prefixend = NULL;
struct item *lsubstr = NULL, *substrend = NULL;
char buf[sizeof menu->input], *tok;
char **tokv = NULL;
int i, tokc = 0;
size_t tok_len;
menu->matches = NULL;
menu->matches_end = NULL;
menu->sel = NULL;
size_t text_len = strlen(menu->input);
/* tokenize text by space for matching the tokens individually */
strcpy(buf, menu->input);
tok = strtok(buf, " ");
while (tok) {
tokv = realloc(tokv, (tokc + 1) * sizeof *tokv);
if (!tokv) {
fprintf(stderr, "could not realloc %zu bytes",
(tokc + 1) * sizeof *tokv);
exit(EXIT_FAILURE);
}
tokv[tokc] = tok;
tokc++;
tok = strtok(NULL, " ");
}
tok_len = tokc ? strlen(tokv[0]) : 0;
struct item *item;
for (item = menu->items; item; item = item->next) {
for (i = 0; i < tokc; i++) {
if (!fstrstr(menu, item->text, tokv[i])) {
/* token does not match */
break;
}
}
if (i != tokc) {
/* not all tokens match */
continue;
}
if (!tokc || !menu->strncmp(menu->input, item->text, text_len + 1)) {
append_item(item, &lexact, &exactend);
} else if (!menu->strncmp(tokv[0], item->text, tok_len)) {
append_item(item, &lprefix, &prefixend);
} else {
append_item(item, &lsubstr, &substrend);
}
}
if (lexact) {
menu->matches = lexact;
menu->matches_end = exactend;
}
if (lprefix) {
if (menu->matches_end) {
menu->matches_end->next_match = lprefix;
lprefix->prev_match = menu->matches_end;
} else {
menu->matches = lprefix;
}
menu->matches_end = prefixend;
}
if (lsubstr) {
if (menu->matches_end) {
menu->matches_end->next_match = lsubstr;
lsubstr->prev_match = menu->matches_end;
} else {
menu->matches = lsubstr;
}
menu->matches_end = substrend;
}
page_items(menu);
if (menu->pages) {
menu->sel = menu->pages->first;
}
}
// Read menu items from standard input.
void read_menu_items(struct menu *menu) {
char buf[sizeof menu->input], *p;
struct item *item, **end;
for(end = &menu->items; fgets(buf, sizeof buf, stdin); *end = item, end = &item->next) {
if((p = strchr(buf, '\n'))) {
*p = '\0';
}
item = malloc(sizeof *item);
if (!item) {
return;
}
item->text = strdup(buf);
item->next = item->prev_match = item->next_match = NULL;
}
calc_widths(menu);
match_items(menu);
}
static void insert(struct menu *menu, const char *s, ssize_t n) {
if (strlen(menu->input) + n > sizeof menu->input - 1) {
return;
}
memmove(menu->input + menu->cursor + n, menu->input + menu->cursor,
sizeof menu->input - menu->cursor - MAX(n, 0));
if (n > 0 && s != NULL) {
memcpy(menu->input + menu->cursor, s, n);
}
menu->cursor += n;
}
static size_t nextrune(struct menu *menu, int incr) {
size_t n, len;
len = strlen(menu->input);
for(n = menu->cursor + incr; n < len && (menu->input[n] & 0xc0) == 0x80; n += incr);
return n;
}
// Move the cursor to the beginning or end of the word, skipping over any preceding whitespace.
static void movewordedge(struct menu *menu, int dir) {
size_t len = strlen(menu->input);
while (menu->cursor > 0 && menu->cursor < len && menu->input[nextrune(menu, dir)] == ' ') {
menu->cursor = nextrune(menu, dir);
}
while (menu->cursor > 0 && menu->cursor < len && menu->input[nextrune(menu, dir)] != ' ') {
menu->cursor = nextrune(menu, dir);
}
}
// Handle a keypress.
void menu_keypress(struct menu *menu, enum wl_keyboard_key_state key_state,
xkb_keysym_t sym) {
if (key_state != WL_KEYBOARD_KEY_STATE_PRESSED) {
return;
}
bool ctrl = xkb_state_mod_name_is_active(menu->keyboard->xkb_state,
XKB_MOD_NAME_CTRL,
XKB_STATE_MODS_DEPRESSED | XKB_STATE_MODS_LATCHED);
bool meta = xkb_state_mod_name_is_active(menu->keyboard->xkb_state,
XKB_MOD_NAME_ALT,
XKB_STATE_MODS_DEPRESSED | XKB_STATE_MODS_LATCHED);
bool shift = xkb_state_mod_name_is_active(menu->keyboard->xkb_state,
XKB_MOD_NAME_SHIFT,
XKB_STATE_MODS_DEPRESSED | XKB_STATE_MODS_LATCHED);
size_t len = strlen(menu->input);
if (ctrl) {
// Emacs-style line editing bindings
switch (sym) {
case XKB_KEY_a:
sym = XKB_KEY_Home;
break;
case XKB_KEY_b:
sym = XKB_KEY_Left;
break;
case XKB_KEY_c:
sym = XKB_KEY_Escape;
break;
case XKB_KEY_d:
sym = XKB_KEY_Delete;
break;
case XKB_KEY_e:
sym = XKB_KEY_End;
break;
case XKB_KEY_f:
sym = XKB_KEY_Right;
break;
case XKB_KEY_g:
sym = XKB_KEY_Escape;
break;
case XKB_KEY_bracketleft:
sym = XKB_KEY_Escape;
break;
case XKB_KEY_h:
sym = XKB_KEY_BackSpace;
break;
case XKB_KEY_i:
sym = XKB_KEY_Tab;
break;
case XKB_KEY_j:
case XKB_KEY_J:
case XKB_KEY_m:
case XKB_KEY_M:
sym = XKB_KEY_Return;
ctrl = false;
break;
case XKB_KEY_n:
sym = XKB_KEY_Down;
break;
case XKB_KEY_p:
sym = XKB_KEY_Up;
break;
case XKB_KEY_k:
// Delete right
menu->input[menu->cursor] = '\0';
match_items(menu);
render_menu(menu);
return;
case XKB_KEY_u:
// Delete left
insert(menu, NULL, 0 - menu->cursor);
match_items(menu);
render_menu(menu);
return;
case XKB_KEY_w:
// Delete word
while (menu->cursor > 0 && menu->input[nextrune(menu, -1)] == ' ') {
insert(menu, NULL, nextrune(menu, -1) - menu->cursor);
}
while (menu->cursor > 0 && menu->input[nextrune(menu, -1)] != ' ') {
insert(menu, NULL, nextrune(menu, -1) - menu->cursor);
}
match_items(menu);
render_menu(menu);
return;
case XKB_KEY_Y:
// Paste clipboard
if (!menu->offer) {
return;
}
int fds[2];
if (pipe(fds) == -1) {
// Pipe failed
return;
}
wl_data_offer_receive(menu->offer, "text/plain", fds[1]);
close(fds[1]);
wl_display_roundtrip(menu->display);
while (true) {
char buf[1024];
ssize_t n = read(fds[0], buf, sizeof(buf));
if (n <= 0) {
break;
}
insert(menu, buf, n);
}
close(fds[0]);
wl_data_offer_destroy(menu->offer);
menu->offer = NULL;
match_items(menu);
render_menu(menu);
return;
case XKB_KEY_Left:
case XKB_KEY_KP_Left:
movewordedge(menu, -1);
render_menu(menu);
return;
case XKB_KEY_Right:
case XKB_KEY_KP_Right:
movewordedge(menu, +1);
render_menu(menu);
return;
case XKB_KEY_Return:
case XKB_KEY_KP_Enter:
break;
default:
return;
}
} else if (meta) {
// Emacs-style line editing bindings
switch (sym) {
case XKB_KEY_b:
movewordedge(menu, -1);
render_menu(menu);
return;
case XKB_KEY_f:
movewordedge(menu, +1);
render_menu(menu);
return;
case XKB_KEY_g:
sym = XKB_KEY_Home;
break;
case XKB_KEY_G:
sym = XKB_KEY_End;
break;
case XKB_KEY_h:
sym = XKB_KEY_Up;
break;
case XKB_KEY_j:
sym = XKB_KEY_Next;
break;
case XKB_KEY_k:
sym = XKB_KEY_Prior;
break;
case XKB_KEY_l:
sym = XKB_KEY_Down;
break;
default:
return;
}
}
char buf[8];
switch (sym) {
case XKB_KEY_Return:
case XKB_KEY_KP_Enter:
if (shift) {
puts(menu->input);
fflush(stdout);
menu->exit = true;
} else {
char *text = menu->sel ? menu->sel->text : menu->input;
puts(text);
fflush(stdout);
if (!ctrl) {
menu->exit = true;
}
}
break;
case XKB_KEY_Left:
case XKB_KEY_KP_Left:
case XKB_KEY_Up:
case XKB_KEY_KP_Up:
if (menu->sel && menu->sel->prev_match) {
menu->sel = menu->sel->prev_match;
render_menu(menu);
} else if (menu->cursor > 0) {
menu->cursor = nextrune(menu, -1);
render_menu(menu);
}
break;
case XKB_KEY_Right:
case XKB_KEY_KP_Right:
case XKB_KEY_Down:
case XKB_KEY_KP_Down:
if (menu->cursor < len) {
menu->cursor = nextrune(menu, +1);
render_menu(menu);
} else if (menu->sel && menu->sel->next_match) {
menu->sel = menu->sel->next_match;
render_menu(menu);
}
break;
case XKB_KEY_Prior:
case XKB_KEY_KP_Prior:
if (menu->sel && menu->sel->page->prev) {
menu->sel = menu->sel->page->prev->first;
render_menu(menu);
}
break;
case XKB_KEY_Next:
case XKB_KEY_KP_Next:
if (menu->sel && menu->sel->page->next) {
menu->sel = menu->sel->page->next->first;
render_menu(menu);
}
break;
case XKB_KEY_Home:
case XKB_KEY_KP_Home:
if (menu->sel == menu->matches) {
menu->cursor = 0;
render_menu(menu);
} else {
menu->sel = menu->matches;
render_menu(menu);
}
break;
case XKB_KEY_End:
case XKB_KEY_KP_End:
if (menu->cursor < len) {
menu->cursor = len;
render_menu(menu);
} else {
menu->sel = menu->matches_end;
render_menu(menu);
}
break;
case XKB_KEY_BackSpace:
if (menu->cursor > 0) {
insert(menu, NULL, nextrune(menu, -1) - menu->cursor);
match_items(menu);
render_menu(menu);
}
break;
case XKB_KEY_Delete:
case XKB_KEY_KP_Delete:
if (menu->cursor == len) {
return;
}
menu->cursor = nextrune(menu, +1);
insert(menu, NULL, nextrune(menu, -1) - menu->cursor);
match_items(menu);
render_menu(menu);
break;
case XKB_KEY_Tab:
if (!menu->sel) {
return;
}
menu->cursor = strnlen(menu->sel->text, sizeof menu->input - 1);
memcpy(menu->input, menu->sel->text, menu->cursor);
menu->input[menu->cursor] = '\0';
match_items(menu);
render_menu(menu);
break;
case XKB_KEY_Escape:
menu->exit = true;
menu->failure = true;
break;
default:
if (xkb_keysym_to_utf8(sym, buf, 8)) {
insert(menu, buf, strnlen(buf, 8));
match_items(menu);
render_menu(menu);
}
}
}

102
menu.h Normal file
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@ -0,0 +1,102 @@
#ifndef WMENU_MENU_H
#define WMENU_MENU_H
#include <xkbcommon/xkbcommon.h>
#include "pool-buffer.h"
// A menu item.
struct item {
char *text;
int width;
struct item *next; // traverses all items
struct item *prev_match; // previous matching item
struct item *next_match; // next matching item
struct page *page; // the page holding this item
};
// A page of menu items.
struct page {
struct item *first; // first item in the page
struct item *last; // last item in the page
struct page *prev; // previous page
struct page *next; // next page
};
// A Wayland output.
struct output {
struct menu *menu;
struct wl_output *output;
int32_t scale;
};
// Keyboard state.
struct keyboard {
struct menu *menu;
struct xkb_context *xkb_context;
struct xkb_state *xkb_state;
int repeat_timer;
int repeat_delay;
int repeat_period;
enum wl_keyboard_key_state repeat_key_state;
xkb_keysym_t repeat_sym;
};
// Menu state.
struct menu {
struct wl_compositor *compositor;
struct wl_shm *shm;
struct wl_seat *seat;
struct wl_data_device_manager *data_device_manager;
struct zwlr_layer_shell_v1 *layer_shell;
struct wl_display *display;
struct wl_surface *surface;
struct wl_data_offer *offer;
struct keyboard *keyboard;
struct output *output;
char *output_name;
struct pool_buffer buffers[2];
struct pool_buffer *current;
int width;
int height;
int line_height;
int padding;
int inputw;
int promptw;
int left_arrow;
int right_arrow;
bool bottom;
int (*strncmp)(const char *, const char *, size_t);
char *font;
int lines;
char *prompt;
uint32_t background, foreground;
uint32_t promptbg, promptfg;
uint32_t selectionbg, selectionfg;
char input[BUFSIZ];
size_t cursor;
struct item *items; // list of all items
struct item *matches; // list of matching items
struct item *matches_end; // last matching item
struct item *sel; // selected item
struct page *pages; // list of pages
bool exit;
bool failure;
};
void menu_init(struct menu *menu, int argc, char *argv[]);
void read_menu_items(struct menu *menu);
void menu_keypress(struct menu *menu, enum wl_keyboard_key_state key_state,
xkb_keysym_t sym);
#endif

View file

@ -37,8 +37,10 @@ executable(
'wmenu', 'wmenu',
files( files(
'main.c', 'main.c',
'menu.c',
'pango.c', 'pango.c',
'pool-buffer.c', 'pool-buffer.c',
'render.c',
), ),
dependencies: [ dependencies: [
cairo, cairo,

View file

@ -5,7 +5,9 @@
#include <stdlib.h> #include <stdlib.h>
#include <string.h> #include <string.h>
int get_font_height(char *fontstr) { #include "pango.h"
int get_font_height(const char *fontstr) {
PangoFontMap *fontmap = pango_cairo_font_map_get_default(); PangoFontMap *fontmap = pango_cairo_font_map_get_default();
PangoContext *context = pango_font_map_create_context(fontmap); PangoContext *context = pango_font_map_create_context(fontmap);
PangoFontDescription *desc = pango_font_description_from_string(fontstr); PangoFontDescription *desc = pango_font_description_from_string(fontstr);

View file

@ -1,5 +1,5 @@
#ifndef DMENU_PANGO_H #ifndef WMENU_PANGO_H
#define DMENU_PANGO_H #define WMENU_PANGO_H
#include <stdbool.h> #include <stdbool.h>
#include <cairo/cairo.h> #include <cairo/cairo.h>
#include <pango/pangocairo.h> #include <pango/pangocairo.h>

View file

@ -11,6 +11,7 @@
#include <time.h> #include <time.h>
#include <unistd.h> #include <unistd.h>
#include <wayland-client.h> #include <wayland-client.h>
#include "pool-buffer.h" #include "pool-buffer.h"
static void randname(char *buf) { static void randname(char *buf) {

View file

@ -1,4 +1,7 @@
/* Taken from sway. MIT licensed */ /* Taken from sway. MIT licensed */
#ifndef WMENU_POOL_BUFFER_H
#define WMENU_POOL_BUFFER_H
#include <cairo.h> #include <cairo.h>
#include <pango/pangocairo.h> #include <pango/pangocairo.h>
#include <stdbool.h> #include <stdbool.h>
@ -19,3 +22,5 @@ struct pool_buffer {
struct pool_buffer *get_next_buffer(struct wl_shm *shm, struct pool_buffer *get_next_buffer(struct wl_shm *shm,
struct pool_buffer pool[static 2], int32_t width, int32_t height, int32_t scale); struct pool_buffer pool[static 2], int32_t width, int32_t height, int32_t scale);
void destroy_buffer(struct pool_buffer *buffer); void destroy_buffer(struct pool_buffer *buffer);
#endif

199
render.c Normal file
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@ -0,0 +1,199 @@
#include <cairo/cairo.h>
#include "render.h"
#include "menu.h"
#include "pango.h"
// Calculate text widths.
void calc_widths(struct menu *menu) {
cairo_t *cairo = menu->current->cairo;
// Calculate prompt width
if (menu->prompt) {
menu->promptw = text_width(cairo, menu->font, menu->prompt) + menu->padding + menu->padding/2;
} else {
menu->promptw = 0;
}
// Calculate scroll indicator widths
menu->left_arrow = text_width(cairo, menu->font, "<") + 2 * menu->padding;
menu->right_arrow = text_width(cairo, menu->font, ">") + 2 * menu->padding;
// Calculate item widths and input area width
for (struct item *item = menu->items; item; item = item->next) {
item->width = text_width(cairo, menu->font, item->text);
if (item->width > menu->inputw) {
menu->inputw = item->width;
}
}
}
static void cairo_set_source_u32(cairo_t *cairo, uint32_t color) {
cairo_set_source_rgba(cairo,
(color >> (3*8) & 0xFF) / 255.0,
(color >> (2*8) & 0xFF) / 255.0,
(color >> (1*8) & 0xFF) / 255.0,
(color >> (0*8) & 0xFF) / 255.0);
}
// Renders text to cairo.
static int render_text(struct menu *menu, cairo_t *cairo, const char *str,
int x, int y, int width, uint32_t bg_color, uint32_t fg_color,
int left_padding, int right_padding) {
int text_width, text_height;
get_text_size(cairo, menu->font, &text_width, &text_height, NULL, 1, str);
int text_y = (menu->line_height / 2.0) - (text_height / 2.0);
if (width == 0) {
width = text_width + left_padding + right_padding;
}
if (bg_color) {
cairo_set_source_u32(cairo, bg_color);
cairo_rectangle(cairo, x, y, width, menu->line_height);
cairo_fill(cairo);
}
cairo_move_to(cairo, x + left_padding, y + text_y);
cairo_set_source_u32(cairo, fg_color);
pango_printf(cairo, menu->font, 1, str);
return width;
}
// Renders the prompt message.
static void render_prompt(struct menu *menu, cairo_t *cairo) {
if (!menu->prompt) {
return;
}
render_text(menu, cairo, menu->prompt, 0, 0, 0,
menu->promptbg, menu->promptfg, menu->padding, menu->padding/2);
}
// Renders the input text.
static void render_input(struct menu *menu, cairo_t *cairo) {
render_text(menu, cairo, menu->input, menu->promptw, 0, 0,
0, menu->foreground, menu->padding, menu->padding);
}
// Renders a cursor for the input field.
static void render_cursor(struct menu *menu, cairo_t *cairo) {
const int cursor_width = 2;
const int cursor_margin = 2;
int cursor_pos = menu->promptw + menu->padding
+ text_width(cairo, menu->font, menu->input)
- text_width(cairo, menu->font, &menu->input[menu->cursor])
- cursor_width / 2;
cairo_rectangle(cairo, cursor_pos, cursor_margin, cursor_width,
menu->line_height - 2 * cursor_margin);
cairo_fill(cairo);
}
// Renders a single menu item horizontally.
static int render_horizontal_item(struct menu *menu, cairo_t *cairo, struct item *item, int x) {
uint32_t bg_color = menu->sel == item ? menu->selectionbg : menu->background;
uint32_t fg_color = menu->sel == item ? menu->selectionfg : menu->foreground;
return render_text(menu, cairo, item->text, x, 0, 0,
bg_color, fg_color, menu->padding, menu->padding);
}
// Renders a single menu item vertically.
static int render_vertical_item(struct menu *menu, cairo_t *cairo, struct item *item, int x, int y) {
uint32_t bg_color = menu->sel == item ? menu->selectionbg : menu->background;
uint32_t fg_color = menu->sel == item ? menu->selectionfg : menu->foreground;
render_text(menu, cairo, item->text, x, y, menu->width - x,
bg_color, fg_color, menu->padding, 0);
return menu->line_height;
}
// Renders a page of menu items horizontally.
static void render_horizontal_page(struct menu *menu, cairo_t *cairo, struct page *page) {
int x = menu->promptw + menu->inputw + menu->left_arrow;
for (struct item *item = page->first; item != page->last->next_match; item = item->next_match) {
x += render_horizontal_item(menu, cairo, item, x);
}
// Draw left and right scroll indicators if necessary
if (page->prev) {
cairo_move_to(cairo, menu->promptw + menu->inputw + menu->padding, 0);
pango_printf(cairo, menu->font, 1, "<");
}
if (page->next) {
cairo_move_to(cairo, menu->width - menu->right_arrow + menu->padding, 0);
pango_printf(cairo, menu->font, 1, ">");
}
}
// Renders a page of menu items vertically.
static void render_vertical_page(struct menu *menu, cairo_t *cairo, struct page *page) {
int x = menu->promptw;
int y = menu->line_height;
for (struct item *item = page->first; item != page->last->next_match; item = item->next_match) {
y += render_vertical_item(menu, cairo, item, x, y);
}
}
// Renders the menu to cairo.
static void render_to_cairo(struct menu *menu, cairo_t *cairo) {
// Render background
cairo_set_operator(cairo, CAIRO_OPERATOR_SOURCE);
cairo_set_source_u32(cairo, menu->background);
cairo_paint(cairo);
// Render prompt and input
render_prompt(menu, cairo);
render_input(menu, cairo);
render_cursor(menu, cairo);
// Render selected page
if (!menu->sel) {
return;
}
if (menu->lines > 0) {
render_vertical_page(menu, cairo, menu->sel->page);
} else {
render_horizontal_page(menu, cairo, menu->sel->page);
}
}
// Renders a single frame of the menu.
void render_menu(struct menu *menu) {
cairo_surface_t *recorder = cairo_recording_surface_create(
CAIRO_CONTENT_COLOR_ALPHA, NULL);
cairo_t *cairo = cairo_create(recorder);
cairo_set_antialias(cairo, CAIRO_ANTIALIAS_BEST);
cairo_font_options_t *fo = cairo_font_options_create();
cairo_set_font_options(cairo, fo);
cairo_font_options_destroy(fo);
cairo_save(cairo);
cairo_set_operator(cairo, CAIRO_OPERATOR_CLEAR);
cairo_paint(cairo);
cairo_restore(cairo);
render_to_cairo(menu, cairo);
int scale = menu->output ? menu->output->scale : 1;
menu->current = get_next_buffer(menu->shm,
menu->buffers, menu->width, menu->height, scale);
if (!menu->current) {
goto cleanup;
}
cairo_t *shm = menu->current->cairo;
cairo_save(shm);
cairo_set_operator(shm, CAIRO_OPERATOR_CLEAR);
cairo_paint(shm);
cairo_restore(shm);
cairo_set_source_surface(shm, recorder, 0, 0);
cairo_paint(shm);
wl_surface_set_buffer_scale(menu->surface, scale);
wl_surface_attach(menu->surface, menu->current->buffer, 0, 0);
wl_surface_damage(menu->surface, 0, 0, menu->width, menu->height);
wl_surface_commit(menu->surface);
cleanup:
cairo_destroy(cairo);
}

9
render.h Normal file
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#ifndef WMENU_RENDER_H
#define WMENU_RENDER_H
#include "menu.h"
void calc_widths(struct menu *menu);
void render_menu(struct menu *menu);
#endif