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#include <limits.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <wlr/util/log.h>
#include "cairo.h"
#include "pango.h"
#include "pool-buffer.h"
#include "swaybar/bar.h"
#include "swaybar/config.h"
#include "swaybar/render.h"
#include "swaybar/status_line.h"
#include "wlr-layer-shell-unstable-v1-client-protocol.h"
static const int ws_horizontal_padding = 5;
static const double ws_vertical_padding = 1.5;
static const double border_width = 1;
static uint32_t render_status_line_text(cairo_t *cairo,
struct swaybar_config *config, struct status_line *status,
bool focused, uint32_t width, uint32_t height) {
if (!status->text) {
return 0;
}
//wlr_log(L_DEBUG, "focused %d", focused);
cairo_set_source_u32(cairo, focused ?
config->colors.focused_statusline : config->colors.statusline);
static const int margin = 3;
int text_width, text_height;
get_text_size(cairo, config->font, &text_width, &text_height,
1, config->pango_markup, "%s", status->text);
uint32_t ideal_height = text_height + ws_vertical_padding * 2;
if (height < ideal_height) {
height = ideal_height;
}
double text_y = height / 2.0 - text_height / 2.0;
cairo_move_to(cairo, width - text_width - margin, (int)floor(text_y));
pango_printf(cairo, config->font, 1, config->pango_markup,
"%s", status->text);
return ideal_height;
}
static uint32_t render_status_line_i3bar(cairo_t *cairo,
struct swaybar_config *config, struct status_line *status,
bool focused, uint32_t width, uint32_t height) {
// TODO
return 0;
}
static uint32_t render_status_line(cairo_t *cairo,
struct swaybar_config *config, struct status_line *status,
bool focused, uint32_t width, uint32_t height) {
switch (status->protocol) {
case PROTOCOL_TEXT:
return render_status_line_text(cairo,
config, status, focused, width, height);
case PROTOCOL_I3BAR:
return render_status_line_i3bar(cairo,
config, status, focused, width, height);
default:
return 0;
}
}
static uint32_t render_binding_mode_indicator(cairo_t *cairo,
struct swaybar_config *config, const char *mode, double x,
uint32_t height) {
int text_width, text_height;
get_text_size(cairo, config->font, &text_width, &text_height,
1, true, "%s", mode);
uint32_t ideal_height = text_height + ws_vertical_padding * 2
+ border_width * 2;
if (height < ideal_height) {
height = ideal_height;
}
uint32_t width = text_width + ws_horizontal_padding * 2 + border_width * 2;
cairo_set_source_u32(cairo, config->colors.binding_mode.background);
cairo_rectangle(cairo, x, 0, width, height);
cairo_fill(cairo);
cairo_set_source_u32(cairo, config->colors.binding_mode.border);
cairo_rectangle(cairo, x, 0, width, border_width);
cairo_fill(cairo);
cairo_rectangle(cairo, x, 0, border_width, height);
cairo_fill(cairo);
cairo_rectangle(cairo, x + width - border_width, 0, border_width, height);
cairo_fill(cairo);
cairo_rectangle(cairo, x, height - border_width, width, border_width);
cairo_fill(cairo);
double text_y = height / 2.0 - text_height / 2.0;
cairo_set_source_u32(cairo, config->colors.binding_mode.text);
cairo_move_to(cairo, x + width / 2 - text_width / 2, (int)floor(text_y));
pango_printf(cairo, config->font, 1, true, "%s", mode);
return ideal_height;
}
static const char *strip_workspace_number(const char *ws_name) {
size_t len = strlen(ws_name);
for (size_t i = 0; i < len; ++i) {
if (ws_name[i] < '0' || ws_name[i] > '9') {
if (':' == ws_name[i] && i < len - 1 && i > 0) {
return ws_name + i + 1;
}
return ws_name;
}
}
return ws_name;
}
static uint32_t render_workspace_button(cairo_t *cairo,
struct swaybar_config *config, struct swaybar_workspace *ws,
double *x, uint32_t height) {
const char *name = ws->name;
if (config->strip_workspace_numbers) {
name = strip_workspace_number(ws->name);
}
struct box_colors box_colors;
if (ws->urgent) {
box_colors = config->colors.urgent_workspace;
} else if (ws->focused) {
box_colors = config->colors.focused_workspace;
} else if (ws->visible) {
box_colors = config->colors.active_workspace;
} else {
box_colors = config->colors.inactive_workspace;
}
int text_width, text_height;
get_text_size(cairo, config->font, &text_width, &text_height,
1, true, "%s", name);
uint32_t ideal_height = ws_vertical_padding * 2 + text_height
+ border_width * 2;
if (height < ideal_height) {
height = ideal_height;
}
uint32_t width = ws_horizontal_padding * 2 + text_width + border_width * 2;
cairo_set_source_u32(cairo, box_colors.background);
cairo_rectangle(cairo, *x, 0, width, height);
cairo_fill(cairo);
cairo_set_source_u32(cairo, box_colors.border);
cairo_rectangle(cairo, *x, 0, width, border_width);
cairo_fill(cairo);
cairo_rectangle(cairo, *x, 0, border_width, height);
cairo_fill(cairo);
cairo_rectangle(cairo, *x + width - border_width, 0, border_width, height);
cairo_fill(cairo);
cairo_rectangle(cairo, *x, height - border_width, width, border_width);
cairo_fill(cairo);
double text_y = height / 2.0 - text_height / 2.0;
cairo_set_source_u32(cairo, box_colors.text);
cairo_move_to(cairo, *x + width / 2 - text_width / 2, (int)floor(text_y));
pango_printf(cairo, config->font, 1, true, "%s", name);
*x += width;
return ideal_height;
}
static uint32_t render_to_cairo(cairo_t *cairo,
struct swaybar *bar, struct swaybar_output *output) {
struct swaybar_config *config = bar->config;
cairo_set_operator(cairo, CAIRO_OPERATOR_SOURCE);
if (output->focused) {
cairo_set_source_u32(cairo, config->colors.focused_background);
} else {
cairo_set_source_u32(cairo, config->colors.background);
}
cairo_paint(cairo);
uint32_t max_height = 0;
/*
* Each render_* function takes the actual height of the bar, and returns
* the ideal height. If the actual height is too short, the render function
* can do whatever it wants - the buffer won't be committed. If the actual
* height is too tall, the render function should adapt its drawing to
* utilize the available space.
*/
double x = 0;
if (config->workspace_buttons) {
struct swaybar_workspace *ws;
wl_list_for_each_reverse(ws, &output->workspaces, link) {
uint32_t h = render_workspace_button(
cairo, config, ws, &x, output->height);
max_height = h > max_height ? h : max_height;
}
}
if (config->binding_mode_indicator && config->mode) {
uint32_t h = render_binding_mode_indicator(
cairo, config, config->mode, x, output->height);
max_height = h > max_height ? h : max_height;
}
if (bar->status) {
uint32_t h = render_status_line(cairo, config, bar->status,
output->focused, output->width, output->height);
max_height = h > max_height ? h : max_height;
}
return max_height > output->height ? max_height : output->height;
}
void render_frame(struct swaybar *bar,
struct swaybar_output *output) {
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, bar, output);
if (bar->config->height >= 0 && height < (uint32_t)bar->config->height) {
height = bar->config->height;
}
if (height != output->height) {
// Reconfigure surface
zwlr_layer_surface_v1_set_size(
output->layer_surface, 0, height);
zwlr_layer_surface_v1_set_exclusive_zone(output->layer_surface, height);
// TODO: this could infinite loop if the compositor assigns us a
// different height than what we asked for
wl_surface_commit(output->surface);
wl_display_roundtrip(bar->display);
} else {
// Replay recording into shm and send it off
output->current_buffer = get_next_buffer(bar->shm,
output->buffers, output->width, output->height);
cairo_t *shm = output->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_attach(output->surface,
output->current_buffer->buffer, 0, 0);
wl_surface_damage(output->surface, 0, 0, output->width, output->height);
wl_surface_commit(output->surface);
wl_display_roundtrip(bar->display);
}
cairo_surface_destroy(recorder);
cairo_destroy(cairo);
}
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