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#include <stdint.h>
#include "cairo.h"
#include "log.h"
#include "pango.h"
#include "pool-buffer.h"
#include "swaynagbar/nagbar.h"
#include "wlr-layer-shell-unstable-v1-client-protocol.h"
static uint32_t render_message(cairo_t *cairo, struct sway_nagbar *nagbar) {
uint32_t height = nagbar->height * nagbar->scale;
height -= NAGBAR_BAR_BORDER_THICKNESS * nagbar->scale;
int text_width, text_height;
get_text_size(cairo, nagbar->font, &text_width, &text_height,
nagbar->scale, true, "%s", nagbar->message);
int padding = NAGBAR_MESSAGE_PADDING * nagbar->scale;
uint32_t ideal_height = text_height + padding * 2;
uint32_t ideal_surface_height = ideal_height / nagbar->scale;
if (nagbar->height < ideal_surface_height) {
return ideal_surface_height;
}
cairo_set_source_u32(cairo, nagbar->colors.text);
cairo_move_to(cairo, padding, (int)(height / 2.0 - text_height / 2.0));
pango_printf(cairo, nagbar->font, nagbar->scale, true, "%s",
nagbar->message);
return nagbar->height;
}
static uint32_t render_button(cairo_t *cairo, struct sway_nagbar *nagbar,
int button_index, int *x) {
uint32_t height = nagbar->height * nagbar->scale;
height -= NAGBAR_BAR_BORDER_THICKNESS * nagbar->scale;
struct sway_nagbar_button *button = nagbar->buttons->items[button_index];
int text_width, text_height;
get_text_size(cairo, nagbar->font, &text_width, &text_height,
nagbar->scale, true, "%s", button->text);
int border = NAGBAR_BUTTON_BORDER_THICKNESS * nagbar->scale;
int padding = NAGBAR_BUTTON_PADDING * nagbar->scale;
uint32_t ideal_height = text_height + padding * 2 + border * 2;
uint32_t ideal_surface_height = ideal_height / nagbar->scale;
if (nagbar->height < ideal_surface_height) {
return ideal_surface_height;
}
button->x = *x - border - text_width - padding * 2;
button->y = (int)(height / 2.0 - text_height / 2.0) - padding;
button->width = text_width + padding * 2;
button->height = text_height + padding * 2;
cairo_set_source_u32(cairo, nagbar->colors.border);
cairo_rectangle(cairo, button->x - border, button->y - border,
button->width + border * 2, button->height + border * 2);
cairo_fill(cairo);
cairo_set_source_u32(cairo, nagbar->colors.button_background);
cairo_rectangle(cairo, button->x, button->y,
button->width, button->height);
cairo_fill(cairo);
cairo_set_source_u32(cairo, nagbar->colors.text);
cairo_move_to(cairo, button->x + padding, button->y + padding);
pango_printf(cairo, nagbar->font, nagbar->scale, true, "%s", button->text);
*x = button->x - border;
return nagbar->height;
}
static uint32_t render_to_cairo(cairo_t *cairo, struct sway_nagbar *nagbar) {
uint32_t max_height = 0;
cairo_set_operator(cairo, CAIRO_OPERATOR_SOURCE);
cairo_set_source_u32(cairo, nagbar->colors.background);
cairo_paint(cairo);
uint32_t h = render_message(cairo, nagbar);
max_height = h > max_height ? h : max_height;
int x = (nagbar->width - NAGBAR_BUTTON_MARGIN_RIGHT) * nagbar->scale;
for (int i = 0; i < nagbar->buttons->length; i++) {
h = render_button(cairo, nagbar, i, &x);
max_height = h > max_height ? h : max_height;
x -= NAGBAR_BUTTON_GAP * nagbar->scale;
if (i == 0) {
x -= NAGBAR_BUTTON_GAP_CLOSE * nagbar->scale;
}
}
int border = NAGBAR_BAR_BORDER_THICKNESS * nagbar->scale;
if (max_height > nagbar->height) {
max_height += border;
}
cairo_set_source_u32(cairo, nagbar->colors.border_bottom);
cairo_rectangle(cairo, 0, nagbar->height * nagbar->scale - border,
nagbar->width * nagbar->scale, border);
cairo_fill(cairo);
return max_height > nagbar->height ? max_height : nagbar->height;
}
void render_frame(struct sway_nagbar *nagbar) {
if (!nagbar->run_display) {
return;
}
cairo_surface_t *recorder = cairo_recording_surface_create(
CAIRO_CONTENT_COLOR_ALPHA, NULL);
cairo_t *cairo = cairo_create(recorder);
cairo_save(cairo);
cairo_set_operator(cairo, CAIRO_OPERATOR_CLEAR);
cairo_paint(cairo);
cairo_restore(cairo);
uint32_t height = render_to_cairo(cairo, nagbar);
if (height != nagbar->height) {
zwlr_layer_surface_v1_set_size(nagbar->layer_surface, 0, height);
zwlr_layer_surface_v1_set_exclusive_zone(nagbar->layer_surface,
height);
wl_surface_commit(nagbar->surface);
wl_display_roundtrip(nagbar->display);
} else {
nagbar->current_buffer = get_next_buffer(nagbar->shm,
nagbar->buffers,
nagbar->width * nagbar->scale,
nagbar->height * nagbar->scale);
cairo_t *shm = nagbar->current_buffer->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, 0.0);
cairo_paint(shm);
wl_surface_set_buffer_scale(nagbar->surface, nagbar->scale);
wl_surface_attach(nagbar->surface,
nagbar->current_buffer->buffer, 0, 0);
wl_surface_damage(nagbar->surface, 0, 0,
nagbar->width, nagbar->height);
wl_surface_commit(nagbar->surface);
wl_display_roundtrip(nagbar->display);
}
cairo_surface_destroy(recorder);
cairo_destroy(cairo);
}
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