sway/swaybar/render.c

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17 KiB
C
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#define _POSIX_C_SOURCE 200809L
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#include <limits.h>
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#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"
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#include "swaybar/config.h"
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#include "swaybar/ipc.h"
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#include "swaybar/render.h"
#include "swaybar/status_line.h"
#include "wlr-layer-shell-unstable-v1-client-protocol.h"
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static const int WS_HORIZONTAL_PADDING = 5;
static const double WS_VERTICAL_PADDING = 1.5;
static const double BORDER_WIDTH = 1;
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static uint32_t render_status_line_error(cairo_t *cairo,
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struct swaybar_output *output, struct swaybar_config *config,
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const char *error, double *x, uint32_t surface_height) {
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if (!error) {
return 0;
}
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uint32_t height = surface_height * output->scale;
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cairo_set_source_u32(cairo, 0xFF0000FF);
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int margin = 3 * output->scale;
int ws_vertical_padding = WS_VERTICAL_PADDING * output->scale;
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int text_width, text_height;
get_text_size(cairo, config->font, &text_width, &text_height, NULL,
output->scale, false, "%s", error);
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uint32_t ideal_height = text_height + ws_vertical_padding * 2;
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uint32_t ideal_surface_height = ideal_height / output->scale;
if (surface_height < ideal_surface_height) {
return ideal_surface_height;
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}
*x -= text_width + margin;
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double text_y = height / 2.0 - text_height / 2.0;
cairo_move_to(cairo, *x, (int)floor(text_y));
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pango_printf(cairo, config->font, output->scale, false, "%s", error);
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*x -= margin;
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return surface_height;
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}
static uint32_t render_status_line_text(cairo_t *cairo,
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struct swaybar_output *output, struct swaybar_config *config,
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const char *text, bool focused, double *x, uint32_t surface_height) {
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if (!text) {
return 0;
}
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uint32_t height = surface_height * output->scale;
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cairo_set_source_u32(cairo, focused ?
config->colors.focused_statusline : config->colors.statusline);
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int text_width, text_height;
get_text_size(cairo, config->font, &text_width, &text_height, NULL,
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output->scale, config->pango_markup, "%s", text);
int ws_vertical_padding = WS_VERTICAL_PADDING * output->scale;
int margin = 3 * output->scale;
uint32_t ideal_height = text_height + ws_vertical_padding * 2;
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uint32_t ideal_surface_height = ideal_height / output->scale;
if (surface_height < ideal_surface_height) {
return ideal_surface_height;
}
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*x -= text_width + margin;
double text_y = height / 2.0 - text_height / 2.0;
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cairo_move_to(cairo, *x, (int)floor(text_y));
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pango_printf(cairo, config->font, output->scale,
config->pango_markup, "%s", text);
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*x -= margin;
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return surface_height;
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}
static void render_sharp_line(cairo_t *cairo, uint32_t color,
double x, double y, double width, double height) {
cairo_set_source_u32(cairo, color);
if (width > 1 && height > 1) {
cairo_rectangle(cairo, x, y, width, height);
cairo_fill(cairo);
} else {
if (width == 1) {
x += 0.5;
height += y;
width = x;
}
if (height == 1) {
y += 0.5;
width += x;
height = y;
}
cairo_move_to(cairo, x, y);
cairo_set_line_width(cairo, 1.0);
cairo_line_to(cairo, width, height);
cairo_stroke(cairo);
}
}
static enum hotspot_event_handling block_hotspot_callback(struct swaybar_output *output,
int x, int y, enum x11_button button, void *data) {
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struct i3bar_block *block = data;
struct status_line *status = output->bar->status;
return i3bar_block_send_click(status, block, x, y, button);
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}
static void i3bar_block_unref_callback(void *data) {
i3bar_block_unref(data);
}
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static uint32_t render_status_block(cairo_t *cairo,
struct swaybar_output *output, struct i3bar_block *block, double *x,
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uint32_t surface_height, bool focused, bool edge) {
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if (!block->full_text || !*block->full_text) {
return 0;
}
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uint32_t height = surface_height * output->scale;
struct swaybar_config *config = output->bar->config;
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int text_width, text_height;
get_text_size(cairo, config->font, &text_width, &text_height, NULL,
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output->scale, block->markup, "%s", block->full_text);
int margin = 3 * output->scale;
int ws_vertical_padding = WS_VERTICAL_PADDING * 2;
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int width = text_width;
if (width < block->min_width) {
width = block->min_width;
}
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double block_width = width;
uint32_t ideal_height = text_height + ws_vertical_padding * 2;
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uint32_t ideal_surface_height = ideal_height / output->scale;
if (surface_height < ideal_surface_height) {
return ideal_surface_height;
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}
*x -= width;
if (block->border && block->border_left > 0) {
*x -= (block->border_left + margin);
block_width += block->border_left + margin;
}
if (block->border && block->border_right > 0) {
*x -= (block->border_right + margin);
block_width += block->border_right + margin;
}
int sep_width, sep_height;
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if (!edge) {
if (config->sep_symbol) {
get_text_size(cairo, config->font, &sep_width, &sep_height, NULL,
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output->scale, false, "%s", config->sep_symbol);
uint32_t _ideal_height = sep_height + ws_vertical_padding * 2;
uint32_t _ideal_surface_height = _ideal_height / output->scale;
if (surface_height < _ideal_surface_height) {
return _ideal_surface_height;
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}
if (sep_width > block->separator_block_width) {
block->separator_block_width = sep_width + margin * 2;
}
}
*x -= block->separator_block_width;
} else {
*x -= margin;
}
if (output->bar->status->click_events) {
struct swaybar_hotspot *hotspot = calloc(1, sizeof(struct swaybar_hotspot));
hotspot->x = *x;
hotspot->y = 0;
hotspot->width = width;
hotspot->height = height;
hotspot->callback = block_hotspot_callback;
hotspot->destroy = i3bar_block_unref_callback;
hotspot->data = block;
block->ref_count++;
wl_list_insert(&output->hotspots, &hotspot->link);
}
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double pos = *x;
if (block->background) {
cairo_set_source_u32(cairo, block->background);
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cairo_rectangle(cairo, pos - 0.5 * output->scale,
output->scale, width, height);
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cairo_fill(cairo);
}
if (block->border && block->border_top > 0) {
render_sharp_line(cairo, block->border,
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pos - 0.5 * output->scale, output->scale,
block_width, block->border_top);
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}
if (block->border && block->border_bottom > 0) {
render_sharp_line(cairo, block->border,
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pos - 0.5 * output->scale,
height - output->scale - block->border_bottom,
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block_width, block->border_bottom);
}
if (block->border != 0 && block->border_left > 0) {
render_sharp_line(cairo, block->border,
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pos - 0.5 * output->scale, output->scale,
block->border_left, height);
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pos += block->border_left + margin;
}
double offset = 0;
if (strncmp(block->align, "left", 5) == 0) {
offset = pos;
} else if (strncmp(block->align, "right", 5) == 0) {
offset = pos + width - text_width;
} else if (strncmp(block->align, "center", 6) == 0) {
offset = pos + (width - text_width) / 2;
}
cairo_move_to(cairo, offset, height / 2.0 - text_height / 2.0);
uint32_t color = block->color ? *block->color : config->colors.statusline;
cairo_set_source_u32(cairo, color);
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pango_printf(cairo, config->font, output->scale,
block->markup, "%s", block->full_text);
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pos += width;
if (block->border && block->border_right > 0) {
pos += margin;
render_sharp_line(cairo, block->border,
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pos - 0.5 * output->scale, output->scale,
block->border_right, height);
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pos += block->border_right;
}
if (!edge && block->separator) {
if (focused) {
cairo_set_source_u32(cairo, config->colors.focused_separator);
} else {
cairo_set_source_u32(cairo, config->colors.separator);
}
if (config->sep_symbol) {
offset = pos + (block->separator_block_width - sep_width) / 2;
cairo_move_to(cairo, offset, height / 2.0 - sep_height / 2.0);
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pango_printf(cairo, config->font, output->scale, false,
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"%s", config->sep_symbol);
} else {
cairo_set_line_width(cairo, 1);
cairo_move_to(cairo,
pos + block->separator_block_width / 2, margin);
cairo_line_to(cairo,
pos + block->separator_block_width / 2, height - margin);
cairo_stroke(cairo);
}
}
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return surface_height;
}
static uint32_t render_status_line_i3bar(cairo_t *cairo,
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struct swaybar_config *config, struct swaybar_output *output,
struct status_line *status, bool focused,
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double *x, uint32_t surface_height) {
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uint32_t max_height = 0;
bool edge = true;
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struct i3bar_block *block;
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wl_list_for_each(block, &status->blocks, link) {
uint32_t h = render_status_block(cairo, output,
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block, x, surface_height, focused, edge);
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max_height = h > max_height ? h : max_height;
edge = false;
}
return max_height;
}
static uint32_t render_status_line(cairo_t *cairo,
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struct swaybar_config *config, struct swaybar_output *output,
struct status_line *status, bool focused,
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double *x, uint32_t surface_height) {
switch (status->protocol) {
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case PROTOCOL_ERROR:
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return render_status_line_error(cairo, output, config,
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status->text, x, surface_height);
case PROTOCOL_TEXT:
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return render_status_line_text(cairo, output, config,
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status->text, focused, x, surface_height);
case PROTOCOL_I3BAR:
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return render_status_line_i3bar(cairo, config, output,
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status, focused, x, surface_height);
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case PROTOCOL_UNDEF:
return 0;
}
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return 0;
}
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static uint32_t render_binding_mode_indicator(cairo_t *cairo,
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struct swaybar_output *output, struct swaybar_config *config,
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const char *mode, double x, uint32_t surface_height) {
uint32_t height = surface_height * output->scale;
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int text_width, text_height;
get_text_size(cairo, config->font, &text_width, &text_height, NULL,
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output->scale, config->mode_pango_markup,
"%s", mode);
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int ws_vertical_padding = WS_VERTICAL_PADDING * output->scale;
int ws_horizontal_padding = WS_HORIZONTAL_PADDING * output->scale;
int border_width = BORDER_WIDTH * output->scale;
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uint32_t ideal_height = text_height + ws_vertical_padding * 2
+ border_width * 2;
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uint32_t ideal_surface_height = ideal_height / output->scale;
if (surface_height < ideal_surface_height) {
return ideal_surface_height;
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}
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uint32_t width = text_width + ws_horizontal_padding * 2 + border_width * 2;
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cairo_set_source_u32(cairo, config->colors.binding_mode.background);
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cairo_rectangle(cairo, x, 0, width, height);
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cairo_fill(cairo);
cairo_set_source_u32(cairo, config->colors.binding_mode.border);
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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);
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double text_y = height / 2.0 - text_height / 2.0;
cairo_set_source_u32(cairo, config->colors.binding_mode.text);
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cairo_move_to(cairo, x + width / 2 - text_width / 2, (int)floor(text_y));
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pango_printf(cairo, config->font, output->scale, config->mode_pango_markup,
"%s", mode);
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return surface_height;
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}
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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 enum hotspot_event_handling workspace_hotspot_callback(struct swaybar_output *output,
int x, int y, enum x11_button button, void *data) {
if (button != LEFT) {
return HOTSPOT_PROCESS;
}
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ipc_send_workspace_command(output->bar, (const char *)data);
return HOTSPOT_IGNORE;
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}
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static uint32_t render_workspace_button(cairo_t *cairo,
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struct swaybar_output *output, struct swaybar_config *config,
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struct swaybar_workspace *ws, double *x, uint32_t surface_height) {
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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;
}
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uint32_t height = surface_height * output->scale;
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int text_width, text_height;
get_text_size(cairo, config->font, &text_width, &text_height, NULL,
output->scale, config->pango_markup, "%s", name);
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int ws_vertical_padding = WS_VERTICAL_PADDING * output->scale;
int ws_horizontal_padding = WS_HORIZONTAL_PADDING * output->scale;
int border_width = BORDER_WIDTH * output->scale;
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uint32_t ideal_height = ws_vertical_padding * 2 + text_height
+ border_width * 2;
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uint32_t ideal_surface_height = ideal_height / output->scale;
if (surface_height < ideal_surface_height) {
return ideal_surface_height;
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}
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uint32_t width = ws_horizontal_padding * 2 + text_width + border_width * 2;
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cairo_set_source_u32(cairo, box_colors.background);
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cairo_rectangle(cairo, *x, 0, width, height);
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cairo_fill(cairo);
cairo_set_source_u32(cairo, box_colors.border);
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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);
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double text_y = height / 2.0 - text_height / 2.0;
cairo_set_source_u32(cairo, box_colors.text);
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cairo_move_to(cairo, *x + width / 2 - text_width / 2, (int)floor(text_y));
pango_printf(cairo, config->font, output->scale, config->pango_markup,
"%s", name);
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struct swaybar_hotspot *hotspot = calloc(1, sizeof(struct swaybar_hotspot));
hotspot->x = *x;
hotspot->y = 0;
hotspot->width = width;
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hotspot->height = height;
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hotspot->callback = workspace_hotspot_callback;
hotspot->destroy = free;
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hotspot->data = strdup(ws->name);
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wl_list_insert(&output->hotspots, &hotspot->link);
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*x += width;
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return surface_height;
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}
static uint32_t render_to_cairo(cairo_t *cairo,
struct swaybar *bar, struct swaybar_output *output) {
struct swaybar_config *config = bar->config;
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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);
}
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cairo_paint(cairo);
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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.
*/
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double x = output->width * output->scale;
if (bar->status) {
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uint32_t h = render_status_line(cairo, config, output,
bar->status, output->focused, &x, output->height);
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max_height = h > max_height ? h : max_height;
}
x = 0;
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if (config->workspace_buttons) {
struct swaybar_workspace *ws;
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wl_list_for_each_reverse(ws, &output->workspaces, link) {
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uint32_t h = render_workspace_button(cairo,
output, config, ws, &x, output->height);
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max_height = h > max_height ? h : max_height;
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}
}
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if (config->binding_mode_indicator && config->mode) {
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uint32_t h = render_binding_mode_indicator(cairo,
output, config, config->mode, x, output->height);
max_height = h > max_height ? h : max_height;
}
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return max_height > output->height ? max_height : output->height;
}
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void render_frame(struct swaybar *bar, struct swaybar_output *output) {
struct swaybar_hotspot *hotspot, *tmp;
wl_list_for_each_safe(hotspot, tmp, &output->hotspots, link) {
if (hotspot->destroy) {
hotspot->destroy(hotspot->data);
}
wl_list_remove(&hotspot->link);
free(hotspot);
}
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
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zwlr_layer_surface_v1_set_size(output->layer_surface, 0, height);
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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 if (height > 0) {
// Replay recording into shm and send it off
output->current_buffer = get_next_buffer(bar->shm,
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output->buffers,
output->width * output->scale,
output->height * output->scale);
if (!output->current_buffer) {
return;
}
cairo_t *shm = output->current_buffer->cairo;
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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);
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wl_surface_set_buffer_scale(output->surface, output->scale);
wl_surface_attach(output->surface,
output->current_buffer->buffer, 0, 0);
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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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}