276 lines
8.9 KiB
C
276 lines
8.9 KiB
C
#define _POSIX_C_SOURCE 200809L
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#include <limits.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include <string.h>
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#include <wlr/util/log.h>
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#include "cairo.h"
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#include "pango.h"
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#include "pool-buffer.h"
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#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"
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#include "swaybar/status_line.h"
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#include "wlr-layer-shell-unstable-v1-client-protocol.h"
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static const int ws_horizontal_padding = 5;
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static const double ws_vertical_padding = 1.5;
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static const double border_width = 1;
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static uint32_t render_status_line_text(cairo_t *cairo,
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struct swaybar_config *config, struct status_line *status,
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bool focused, uint32_t width, uint32_t height) {
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if (!status->text) {
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return 0;
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}
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cairo_set_source_u32(cairo, focused ?
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config->colors.focused_statusline : config->colors.statusline);
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static const int margin = 3;
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int text_width, text_height;
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get_text_size(cairo, config->font, &text_width, &text_height,
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1, config->pango_markup, "%s", status->text);
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uint32_t ideal_height = text_height + ws_vertical_padding * 2;
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if (height < ideal_height) {
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return ideal_height;
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}
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double text_y = height / 2.0 - text_height / 2.0;
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cairo_move_to(cairo, width - text_width - margin, (int)floor(text_y));
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pango_printf(cairo, config->font, 1, config->pango_markup,
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"%s", status->text);
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return ideal_height;
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}
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static uint32_t render_status_line_i3bar(cairo_t *cairo,
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struct swaybar_config *config, struct status_line *status,
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bool focused, uint32_t width, uint32_t height) {
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// TODO
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return 0;
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}
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static uint32_t render_status_line(cairo_t *cairo,
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struct swaybar_config *config, struct status_line *status,
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bool focused, uint32_t width, uint32_t height) {
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switch (status->protocol) {
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case PROTOCOL_TEXT:
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return render_status_line_text(cairo,
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config, status, focused, width, height);
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case PROTOCOL_I3BAR:
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return render_status_line_i3bar(cairo,
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config, status, focused, width, height);
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default:
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return 0;
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}
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}
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static uint32_t render_binding_mode_indicator(cairo_t *cairo,
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struct swaybar_config *config, const char *mode, double x,
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uint32_t height) {
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int text_width, text_height;
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get_text_size(cairo, config->font, &text_width, &text_height,
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1, true, "%s", mode);
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uint32_t ideal_height = text_height + ws_vertical_padding * 2
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+ border_width * 2;
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if (height < ideal_height) {
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return ideal_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);
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cairo_set_source_u32(cairo, config->colors.binding_mode.border);
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cairo_rectangle(cairo, x, 0, width, border_width);
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cairo_fill(cairo);
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cairo_rectangle(cairo, x, 0, border_width, height);
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cairo_fill(cairo);
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cairo_rectangle(cairo, x + width - border_width, 0, border_width, height);
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cairo_fill(cairo);
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cairo_rectangle(cairo, x, height - border_width, width, border_width);
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cairo_fill(cairo);
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double text_y = height / 2.0 - text_height / 2.0;
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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, 1, true, "%s", mode);
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return ideal_height;
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}
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static const char *strip_workspace_number(const char *ws_name) {
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size_t len = strlen(ws_name);
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for (size_t i = 0; i < len; ++i) {
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if (ws_name[i] < '0' || ws_name[i] > '9') {
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if (':' == ws_name[i] && i < len - 1 && i > 0) {
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return ws_name + i + 1;
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}
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return ws_name;
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}
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}
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return ws_name;
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}
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static void workspace_hotspot_callback(struct swaybar_output *output,
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int x, int y, uint32_t button, void *data) {
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ipc_send_workspace_command(output->bar, (const char *)data);
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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 height) {
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const char *name = ws->name;
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if (config->strip_workspace_numbers) {
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name = strip_workspace_number(ws->name);
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}
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struct box_colors box_colors;
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if (ws->urgent) {
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box_colors = config->colors.urgent_workspace;
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} else if (ws->focused) {
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box_colors = config->colors.focused_workspace;
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} else if (ws->visible) {
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box_colors = config->colors.active_workspace;
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} else {
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box_colors = config->colors.inactive_workspace;
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}
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int text_width, text_height;
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get_text_size(cairo, config->font, &text_width, &text_height,
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1, true, "%s", name);
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uint32_t ideal_height = ws_vertical_padding * 2 + text_height
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+ border_width * 2;
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if (height < ideal_height) {
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return ideal_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);
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cairo_set_source_u32(cairo, box_colors.border);
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cairo_rectangle(cairo, *x, 0, width, border_width);
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cairo_fill(cairo);
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cairo_rectangle(cairo, *x, 0, border_width, height);
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cairo_fill(cairo);
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cairo_rectangle(cairo, *x + width - border_width, 0, border_width, height);
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cairo_fill(cairo);
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cairo_rectangle(cairo, *x, height - border_width, width, border_width);
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cairo_fill(cairo);
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double text_y = height / 2.0 - text_height / 2.0;
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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));
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pango_printf(cairo, config->font, 1, true, "%s", name);
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struct swaybar_hotspot *hotspot = calloc(1, sizeof(struct swaybar_hotspot));
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hotspot->x = *x;
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hotspot->y = 0;
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hotspot->height = height;
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hotspot->width = width;
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hotspot->callback = workspace_hotspot_callback;
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hotspot->destroy = free;
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hotspot->data = strdup(name);
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wl_list_insert(&output->hotspots, &hotspot->link);
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*x += width;
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return height;
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}
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static uint32_t render_to_cairo(cairo_t *cairo,
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struct swaybar *bar, struct swaybar_output *output) {
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struct swaybar_config *config = bar->config;
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cairo_set_operator(cairo, CAIRO_OPERATOR_SOURCE);
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if (output->focused) {
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cairo_set_source_u32(cairo, config->colors.focused_background);
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} else {
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cairo_set_source_u32(cairo, config->colors.background);
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}
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cairo_paint(cairo);
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uint32_t max_height = 0;
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/*
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* Each render_* function takes the actual height of the bar, and returns
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* the ideal height. If the actual height is too short, the render function
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* can do whatever it wants - the buffer won't be committed. If the actual
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* height is too tall, the render function should adapt its drawing to
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* utilize the available space.
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*/
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double x = 0;
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if (config->workspace_buttons) {
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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,
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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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}
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if (config->binding_mode_indicator && config->mode) {
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uint32_t h = render_binding_mode_indicator(
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cairo, config, config->mode, x, output->height);
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max_height = h > max_height ? h : max_height;
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}
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if (bar->status) {
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uint32_t h = render_status_line(cairo, config, bar->status,
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output->focused, output->width, output->height);
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max_height = h > max_height ? h : max_height;
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}
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return max_height > output->height ? max_height : output->height;
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}
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void render_frame(struct swaybar *bar, struct swaybar_output *output) {
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struct swaybar_hotspot *hotspot, *tmp;
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wl_list_for_each_safe(hotspot, tmp, &output->hotspots, link) {
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if (hotspot->destroy) {
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hotspot->destroy(hotspot->data);
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}
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wl_list_remove(&hotspot->link);
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free(hotspot);
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}
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cairo_surface_t *recorder = cairo_recording_surface_create(
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CAIRO_CONTENT_COLOR_ALPHA, NULL);
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cairo_t *cairo = cairo_create(recorder);
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cairo_save(cairo);
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cairo_set_operator(cairo, CAIRO_OPERATOR_CLEAR);
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cairo_paint(cairo);
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cairo_restore(cairo);
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uint32_t height = render_to_cairo(cairo, bar, output);
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if (bar->config->height >= 0 && height < (uint32_t)bar->config->height) {
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height = bar->config->height;
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}
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if (height != output->height) {
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// Reconfigure surface
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zwlr_layer_surface_v1_set_size(
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output->layer_surface, 0, height);
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zwlr_layer_surface_v1_set_exclusive_zone(output->layer_surface, height);
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// TODO: this could infinite loop if the compositor assigns us a
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// different height than what we asked for
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wl_surface_commit(output->surface);
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wl_display_roundtrip(bar->display);
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} else {
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// Replay recording into shm and send it off
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output->current_buffer = get_next_buffer(bar->shm,
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output->buffers, output->width, output->height);
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cairo_t *shm = output->current_buffer->cairo;
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cairo_save(shm);
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cairo_set_operator(shm, CAIRO_OPERATOR_CLEAR);
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cairo_paint(shm);
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cairo_restore(shm);
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cairo_set_source_surface(shm, recorder, 0.0, 0.0);
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cairo_paint(shm);
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wl_surface_attach(output->surface,
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output->current_buffer->buffer, 0, 0);
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wl_surface_damage(output->surface, 0, 0, output->width, output->height);
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wl_surface_commit(output->surface);
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wl_display_roundtrip(bar->display);
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}
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cairo_surface_destroy(recorder);
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cairo_destroy(cairo);
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}
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