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yambar/config.c
Daniel Eklöf 6ac046dec3
config: implement font fallback 
Fonts in the configuration may now be a comma separated list of
fonts (all using the fontconfig format). The first font is the primary
font, and the rest are fallback fonts that will be searched, in order.
2022-02-10 18:34:15 +01:00

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#include "config.h"
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <assert.h>
#include <ctype.h>
#include <dlfcn.h>
#include "bar/bar.h"
#include "color.h"
#include "config-verify.h"
#include "module.h"
#include "plugin.h"
#define LOG_MODULE "config"
#define LOG_ENABLE_DBG 0
#include "log.h"
static uint8_t
hex_nibble(char hex)
{
assert((hex >= '0' && hex <= '9') ||
(hex >= 'a' && hex <= 'f') ||
(hex >= 'A' && hex <= 'F'));
if (hex >= '0' && hex <= '9')
return hex - '0';
else if (hex >= 'a' && hex <= 'f')
return hex - 'a' + 10;
else
return hex - 'A' + 10;
}
static uint8_t
hex_byte(const char hex[2])
{
uint8_t upper = hex_nibble(hex[0]);
uint8_t lower = hex_nibble(hex[1]);
return upper << 4 | lower;
}
pixman_color_t
conf_to_color(const struct yml_node *node)
{
const char *hex = yml_value_as_string(node);
assert(hex != NULL);
assert(strlen(hex) == 8);
uint16_t red = hex_byte(&hex[0]);
uint16_t green = hex_byte(&hex[2]);
uint16_t blue = hex_byte(&hex[4]);
uint16_t alpha = hex_byte(&hex[6]);
alpha |= alpha << 8;
return (pixman_color_t){
.red = (uint32_t)(red << 8 | red) * alpha / 0xffff,
.green = (uint32_t)(green << 8 | green) * alpha / 0xffff,
.blue = (uint32_t)(blue << 8 | blue) * alpha / 0xffff,
.alpha = alpha,
};
}
struct fcft_font *
conf_to_font(const struct yml_node *node)
{
const char *font_spec = yml_value_as_string(node);
size_t count = 0;
size_t size = 0;
const char **fonts = NULL;
char *copy = strdup(font_spec);
for (const char *font = strtok(copy, ",");
font != NULL;
font = strtok(NULL, ","))
{
/* Trim spaces, strictly speaking not necessary, but looks nice :) */
while (isspace(font[0]))
font++;
if (font[0] == '\0')
continue;
if (count + 1 > size) {
size += 4;
fonts = realloc(fonts, size * sizeof(fonts[0]));
}
assert(count + 1 <= size);
fonts[count++] = font;
}
struct fcft_font *ret = fcft_from_name(count, fonts, NULL);
free(fonts);
free(copy);
return ret;
}
struct deco *
conf_to_deco(const struct yml_node *node)
{
struct yml_dict_iter it = yml_dict_iter(node);
const struct yml_node *deco_type = it.key;
const struct yml_node *deco_data = it.value;
const char *type = yml_value_as_string(deco_type);
const struct deco_iface *iface = plugin_load_deco(type);
assert(iface != NULL);
return iface->from_conf(deco_data);
}
static struct particle *
particle_simple_list_from_config(const struct yml_node *node,
struct conf_inherit inherited)
{
size_t count = yml_list_length(node);
struct particle *parts[count];
size_t idx = 0;
for (struct yml_list_iter it = yml_list_iter(node);
it.node != NULL;
yml_list_next(&it), idx++)
{
parts[idx] = conf_to_particle(it.node, inherited);
}
/* Lazy-loaded function pointer to particle_list_new() */
static struct particle *(*particle_list_new)(
struct particle *common,
struct particle *particles[], size_t count,
int left_spacing, int right_spacing) = NULL;
if (particle_list_new == NULL) {
const struct plugin *plug = plugin_load("list", PLUGIN_PARTICLE);
particle_list_new = dlsym(plug->lib, "particle_list_new");
assert(particle_list_new != NULL);
}
struct particle *common = particle_common_new(
0, 0, NULL, fcft_clone(inherited.font), inherited.foreground, NULL);
return particle_list_new(common, parts, count, 0, 2);
}
struct particle *
conf_to_particle(const struct yml_node *node, struct conf_inherit inherited)
{
if (yml_is_list(node))
return particle_simple_list_from_config(node, inherited);
struct yml_dict_iter pair = yml_dict_iter(node);
const char *type = yml_value_as_string(pair.key);
const struct yml_node *margin = yml_get_value(pair.value, "margin");
const struct yml_node *left_margin = yml_get_value(pair.value, "left-margin");
const struct yml_node *right_margin = yml_get_value(pair.value, "right-margin");
const struct yml_node *on_click = yml_get_value(pair.value, "on-click");
const struct yml_node *font_node = yml_get_value(pair.value, "font");
const struct yml_node *foreground_node = yml_get_value(pair.value, "foreground");
const struct yml_node *deco_node = yml_get_value(pair.value, "deco");
int left = margin != NULL ? yml_value_as_int(margin) :
left_margin != NULL ? yml_value_as_int(left_margin) : 0;
int right = margin != NULL ? yml_value_as_int(margin) :
right_margin != NULL ? yml_value_as_int(right_margin) : 0;
const char *on_click_templates[MOUSE_BTN_COUNT] = {NULL};
if (on_click != NULL) {
const char *legacy = yml_value_as_string(on_click);
if (legacy != NULL)
on_click_templates[MOUSE_BTN_LEFT] = legacy;
if (yml_is_dict(on_click)) {
for (struct yml_dict_iter it = yml_dict_iter(on_click);
it.key != NULL;
yml_dict_next(&it))
{
const char *key = yml_value_as_string(it.key);
const char *template = yml_value_as_string(it.value);
if (strcmp(key, "left") == 0)
on_click_templates[MOUSE_BTN_LEFT] = template;
else if (strcmp(key, "middle") == 0)
on_click_templates[MOUSE_BTN_MIDDLE] = template;
else if (strcmp(key, "right") == 0)
on_click_templates[MOUSE_BTN_RIGHT] = template;
else if (strcmp(key, "wheel-up") == 0)
on_click_templates[MOUSE_BTN_WHEEL_UP] = template;
else if (strcmp(key, "wheel-down") == 0)
on_click_templates[MOUSE_BTN_WHEEL_DOWN] = template;
else
assert(false);
}
}
}
struct deco *deco = deco_node != NULL ? conf_to_deco(deco_node) : NULL;
/*
* Font and foreground are inheritable attributes. Each particle
* may specify its own font/foreground values, which will then be
* used by itself, and all its sub-particles. If *not* specified,
* we inherit the values from our parent. Note that since
* particles actually *use* the font/foreground values, we must
* clone the font, since each particle takes ownership of its own
* font.
*/
struct fcft_font *font = font_node != NULL
? conf_to_font(font_node) : fcft_clone(inherited.font);
pixman_color_t foreground = foreground_node != NULL
? conf_to_color(foreground_node) : inherited.foreground;
/* Instantiate base/common particle */
struct particle *common = particle_common_new(
left, right, on_click_templates, font, foreground, deco);
const struct particle_iface *iface = plugin_load_particle(type);
assert(iface != NULL);
return iface->from_conf(pair.value, common);
}
struct bar *
conf_to_bar(const struct yml_node *bar, enum bar_backend backend)
{
if (!conf_verify_bar(bar))
return NULL;
struct bar_config conf = {
.backend = backend,
.layer = BAR_LAYER_BOTTOM,
};
/*
* Required attributes
*/
const struct yml_node *height = yml_get_value(bar, "height");
conf.height = yml_value_as_int(height);
const struct yml_node *location = yml_get_value(bar, "location");
conf.location = strcmp(yml_value_as_string(location), "top") == 0
? BAR_TOP : BAR_BOTTOM;
const struct yml_node *background = yml_get_value(bar, "background");
conf.background = conf_to_color(background);
/*
* Optional attributes
*/
const struct yml_node *monitor = yml_get_value(bar, "monitor");
if (monitor != NULL)
conf.monitor = yml_value_as_string(monitor);
const struct yml_node *layer = yml_get_value(bar, "layer");
if (layer != NULL) {
const char *tmp = yml_value_as_string(layer);
if (strcmp(tmp, "top") == 0)
conf.layer = BAR_LAYER_TOP;
else if (strcmp(tmp, "bottom") == 0)
conf.layer = BAR_LAYER_BOTTOM;
else
assert(false);
}
const struct yml_node *spacing = yml_get_value(bar, "spacing");
if (spacing != NULL)
conf.left_spacing = conf.right_spacing = yml_value_as_int(spacing);
const struct yml_node *left_spacing = yml_get_value(bar, "left-spacing");
if (left_spacing != NULL)
conf.left_spacing = yml_value_as_int(left_spacing);
const struct yml_node *right_spacing = yml_get_value(bar, "right-spacing");
if (right_spacing != NULL)
conf.right_spacing = yml_value_as_int(right_spacing);
const struct yml_node *margin = yml_get_value(bar, "margin");
if (margin != NULL)
conf.left_margin = conf.right_margin = yml_value_as_int(margin);
const struct yml_node *left_margin = yml_get_value(bar, "left-margin");
if (left_margin != NULL)
conf.left_margin = yml_value_as_int(left_margin);
const struct yml_node *right_margin = yml_get_value(bar, "right-margin");
if (right_margin != NULL)
conf.right_margin = yml_value_as_int(right_margin);
const struct yml_node *trackpad_sensitivity =
yml_get_value(bar, "trackpad-sensitivity");
conf.trackpad_sensitivity = trackpad_sensitivity != NULL
? yml_value_as_int(trackpad_sensitivity)
: 30;
const struct yml_node *border = yml_get_value(bar, "border");
if (border != NULL) {
const struct yml_node *width = yml_get_value(border, "width");
const struct yml_node *left_width = yml_get_value(border, "left-width");
const struct yml_node *right_width = yml_get_value(border, "right-width");
const struct yml_node *top_width = yml_get_value(border, "top-width");
const struct yml_node *bottom_width = yml_get_value(border, "bottom-width");
const struct yml_node *color = yml_get_value(border, "color");
const struct yml_node *margin = yml_get_value(border, "margin");
const struct yml_node *left_margin = yml_get_value(border, "left-margin");
const struct yml_node *right_margin = yml_get_value(border, "right-margin");
const struct yml_node *top_margin = yml_get_value(border, "top-margin");
const struct yml_node *bottom_margin = yml_get_value(border, "bottom-margin");
if (width != NULL)
conf.border.left_width =
conf.border.right_width =
conf.border.top_width =
conf.border.bottom_width = yml_value_as_int(width);
if (left_width != NULL)
conf.border.left_width = yml_value_as_int(left_width);
if (right_width != NULL)
conf.border.right_width = yml_value_as_int(right_width);
if (top_width != NULL)
conf.border.top_width = yml_value_as_int(top_width);
if (bottom_width != NULL)
conf.border.bottom_width = yml_value_as_int(bottom_width);
if (color != NULL)
conf.border.color = conf_to_color(color);
if (margin != NULL)
conf.border.left_margin =
conf.border.right_margin =
conf.border.top_margin =
conf.border.bottom_margin = yml_value_as_int(margin);
if (left_margin != NULL)
conf.border.left_margin = yml_value_as_int(left_margin);
if (right_margin != NULL)
conf.border.right_margin = yml_value_as_int(right_margin);
if (top_margin != NULL)
conf.border.top_margin = yml_value_as_int(top_margin);
if (bottom_margin != NULL)
conf.border.bottom_margin = yml_value_as_int(bottom_margin);
}
/*
* Create a default font and foreground
*
* These aren't used by the bar itself, but passed down to modules
* and particles. This allows us to specify a default font and
* foreground color at top-level.
*/
struct fcft_font *font = fcft_from_name(1, &(const char *){"sans"}, NULL);
pixman_color_t foreground = {0xffff, 0xffff, 0xffff, 0xffff}; /* White */
const struct yml_node *font_node = yml_get_value(bar, "font");
if (font_node != NULL) {
fcft_destroy(font);
font = conf_to_font(font_node);
}
const struct yml_node *foreground_node = yml_get_value(bar, "foreground");
if (foreground_node != NULL)
foreground = conf_to_color(foreground_node);
struct conf_inherit inherited = {
.font = font,
.foreground = foreground,
};
const struct yml_node *left = yml_get_value(bar, "left");
const struct yml_node *center = yml_get_value(bar, "center");
const struct yml_node *right = yml_get_value(bar, "right");
for (size_t i = 0; i < 3; i++) {
const struct yml_node *node = i == 0 ? left : i == 1 ? center : right;
if (node != NULL) {
const size_t count = yml_list_length(node);
struct module **mods = calloc(count, sizeof(*mods));
size_t idx = 0;
for (struct yml_list_iter it = yml_list_iter(node);
it.node != NULL;
yml_list_next(&it), idx++)
{
struct yml_dict_iter m = yml_dict_iter(it.node);
const char *mod_name = yml_value_as_string(m.key);
/*
* These aren't used by the modules, but passed down
* to particles. This allows us to specify a default
* font and foreground for each module, and having it
* applied to all its particles.
*/
const struct yml_node *mod_font = yml_get_value(m.value, "font");
const struct yml_node *mod_foreground = yml_get_value(
m.value, "foreground");
struct conf_inherit mod_inherit = {
.font = mod_font != NULL
? conf_to_font(mod_font) : inherited.font,
.foreground = mod_foreground != NULL
? conf_to_color(mod_foreground) : inherited.foreground,
};
const struct module_iface *iface = plugin_load_module(mod_name);
mods[idx] = iface->from_conf(m.value, mod_inherit);
}
if (i == 0) {
conf.left.mods = mods;
conf.left.count = count;
} else if (i == 1) {
conf.center.mods = mods;
conf.center.count = count;
} else {
conf.right.mods = mods;
conf.right.count = count;
}
}
}
struct bar *ret = bar_new(&conf);
free(conf.left.mods);
free(conf.center.mods);
free(conf.right.mods);
fcft_destroy(font);
return ret;
}
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