swaybar: feactor render, statusline

This commit is contained in:
Mikkel Oscar Lyderik 2016-01-23 20:55:01 +01:00
parent bb986cb336
commit a6349a2444
8 changed files with 968 additions and 840 deletions

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@ -9,6 +9,9 @@ include_directories(
add_executable(swaybar add_executable(swaybar
main.c main.c
config.c config.c
render.c
state.c
status_line.c
) )
target_link_libraries(swaybar target_link_libraries(swaybar

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311
swaybar/render.c Normal file
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@ -0,0 +1,311 @@
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include "client/pango.h"
#include "client/window.h"
#include "config.h"
#include "status_line.h"
#include "render.h"
static void cairo_set_source_u32(cairo_t *cairo, uint32_t color) {
cairo_set_source_rgba(cairo,
((color & 0xFF000000) >> 24) / 256.0,
((color & 0xFF0000) >> 16) / 256.0,
((color & 0xFF00) >> 8) / 256.0,
(color & 0xFF) / 256.0);
}
/**
* Renders a sharp line of any width and height.
*
* The line is drawn from (x,y) to (x+width,y+height) where width/height is 0
* if the line has a width/height of one pixel, respectively.
*/
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 void render_block(struct window *window, struct swaybar_config *config, struct status_block *block, double *x, bool edge) {
int width, height, sep_width;
get_text_size(window, &width, &height, "%s", block->full_text);
int textwidth = width;
double block_width = width;
if (width < block->min_width) {
width = block->min_width;
}
*x -= width;
if (block->border != 0 && block->border_left > 0) {
*x -= (block->border_left + config->margin);
block_width += block->border_left + config->margin;
}
if (block->border != 0 && block->border_right > 0) {
*x -= (block->border_right + config->margin);
block_width += block->border_right + config->margin;
}
// Add separator
if (!edge) {
if (config->sep_symbol) {
get_text_size(window, &sep_width, &height, "%s", config->sep_symbol);
if (sep_width > block->separator_block_width) {
block->separator_block_width = sep_width + config->margin * 2;
}
}
*x -= block->separator_block_width;
} else {
*x -= config->margin;
}
double pos = *x;
// render background
if (block->background != 0x0) {
cairo_set_source_u32(window->cairo, block->background);
cairo_rectangle(window->cairo, pos - 0.5, 1, block_width, window->height - 2);
cairo_fill(window->cairo);
}
// render top border
if (block->border != 0 && block->border_top > 0) {
render_sharp_line(window->cairo, block->border,
pos - 0.5,
1,
block_width,
block->border_top);
}
// render bottom border
if (block->border != 0 && block->border_bottom > 0) {
render_sharp_line(window->cairo, block->border,
pos - 0.5,
window->height - 1 - block->border_bottom,
block_width,
block->border_bottom);
}
// render left border
if (block->border != 0 && block->border_left > 0) {
render_sharp_line(window->cairo, block->border,
pos - 0.5,
1,
block->border_left,
window->height - 2);
pos += block->border_left + config->margin;
}
// render text
double offset = 0;
if (strncmp(block->align, "left", 5) == 0) {
offset = pos;
} else if (strncmp(block->align, "right", 5) == 0) {
offset = pos + width - textwidth;
} else if (strncmp(block->align, "center", 6) == 0) {
offset = pos + (width - textwidth) / 2;
}
cairo_move_to(window->cairo, offset, config->margin);
cairo_set_source_u32(window->cairo, block->color);
pango_printf(window, "%s", block->full_text);
pos += width;
// render right border
if (block->border != 0 && block->border_right > 0) {
pos += config->margin;
render_sharp_line(window->cairo, block->border,
pos - 0.5,
1,
block->border_right,
window->height - 2);
pos += block->border_right;
}
// render separator
if (!edge && block->separator) {
cairo_set_source_u32(window->cairo, config->colors.separator);
if (config->sep_symbol) {
offset = pos + (block->separator_block_width - sep_width) / 2;
cairo_move_to(window->cairo, offset, config->margin);
pango_printf(window, "%s", config->sep_symbol);
} else {
cairo_set_line_width(window->cairo, 1);
cairo_move_to(window->cairo, pos + block->separator_block_width/2,
config->margin);
cairo_line_to(window->cairo, pos + block->separator_block_width/2,
window->height - config->margin);
cairo_stroke(window->cairo);
}
}
}
static char *handle_workspace_number(bool strip_num, const char *ws_name) {
bool strip = false;
int i;
if (strip_num) {
int len = strlen(ws_name);
for (i = 0; i < len; ++i) {
if (!('0' <= ws_name[i] && ws_name[i] <= '9')) {
if (':' == ws_name[i] && i < len-1 && i > 0) {
strip = true;
++i;
}
break;
}
}
}
if (strip) {
return strdup(ws_name + i);
}
return strdup(ws_name);
}
static void render_workspace_button(struct window *window, struct swaybar_config *config, struct workspace *ws, double *x) {
// strip workspace numbers if required
char *name = handle_workspace_number(config->strip_workspace_numbers, ws->name);
int width, height;
get_text_size(window, &width, &height, "%s", 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;
}
// background
cairo_set_source_u32(window->cairo, box_colors.background);
cairo_rectangle(window->cairo, *x, 1.5, width + config->ws_horizontal_padding * 2 - 1,
height + config->ws_vertical_padding * 2);
cairo_fill(window->cairo);
// border
cairo_set_source_u32(window->cairo, box_colors.border);
cairo_rectangle(window->cairo, *x, 1.5, width + config->ws_horizontal_padding * 2 - 1,
height + config->ws_vertical_padding * 2);
cairo_stroke(window->cairo);
// text
cairo_set_source_u32(window->cairo, box_colors.text);
cairo_move_to(window->cairo, (int)*x + config->ws_horizontal_padding, config->margin);
pango_printf(window, "%s", name);
*x += width + config->ws_horizontal_padding * 2 + config->ws_spacing;
free(name);
}
static void render_binding_mode_indicator(struct window *window, struct swaybar_config *config, double pos) {
int width, height;
get_text_size(window, &width, &height, "%s", config->mode);
// background
cairo_set_source_u32(window->cairo, config->colors.binding_mode.background);
cairo_rectangle(window->cairo, pos, 1.5, width + config->ws_horizontal_padding * 2 - 1,
height + config->ws_vertical_padding * 2);
cairo_fill(window->cairo);
// border
cairo_set_source_u32(window->cairo, config->colors.binding_mode.border);
cairo_rectangle(window->cairo, pos, 1.5, width + config->ws_horizontal_padding * 2 - 1,
height + config->ws_vertical_padding * 2);
cairo_stroke(window->cairo);
// text
cairo_set_source_u32(window->cairo, config->colors.binding_mode.text);
cairo_move_to(window->cairo, (int)pos + config->ws_horizontal_padding, config->margin);
pango_printf(window, "%s", config->mode);
}
void render(struct output *output, struct swaybar_config *config, struct status_line *line) {
int i;
struct window *window = output->window;
cairo_t *cairo = window->cairo;
// Clear
cairo_save(cairo);
cairo_set_operator(cairo, CAIRO_OPERATOR_CLEAR);
cairo_paint(cairo);
cairo_restore(cairo);
// Background
cairo_set_source_u32(cairo, config->colors.background);
cairo_paint(cairo);
// Command output
cairo_set_source_u32(cairo, config->colors.statusline);
int width, height;
if (line->protocol == TEXT) {
get_text_size(window, &width, &height, "%s", line->text_line);
cairo_move_to(cairo, window->width - config->margin - width, config->margin);
pango_printf(window, "%s", line);
} else if (line->protocol == I3BAR && line->block_line) {
double pos = window->width - 0.5;
bool edge = true;
for (i = line->block_line->length - 1; i >= 0; --i) {
struct status_block *block = line->block_line->items[i];
if (block->full_text && block->full_text[0]) {
render_block(window, config, block, &pos, edge);
edge = false;
}
}
}
cairo_set_line_width(cairo, 1.0);
double x = 0.5;
// Workspaces
if (config->workspace_buttons) {
for (i = 0; i < output->workspaces->length; ++i) {
struct workspace *ws = output->workspaces->items[i];
render_workspace_button(window, config, ws, &x);
}
}
// binding mode indicator
if (config->mode && config->binding_mode_indicator) {
render_binding_mode_indicator(window, config, x);
}
}

12
swaybar/render.h Normal file
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#ifndef _SWAYBAR_RENDER_H
#define _SWAYBAR_RENDER_H
#include "config.h"
#include "state.h"
/**
* Render swaybar.
*/
void render(struct output *output, struct swaybar_config *config, struct status_line *line);
#endif /* _SWAYBAR_RENDER_H */

29
swaybar/state.c Normal file
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@ -0,0 +1,29 @@
#include <stdlib.h>
#include "list.h"
#include "config.h"
#include "status_line.h"
#include "state.h"
struct swaybar_state *init_state() {
struct swaybar_state *state = calloc(1, sizeof(struct swaybar_state));
state->config = init_config();
state->status = init_status_line();
state->output = malloc(sizeof(struct output));
state->output->window = NULL;
state->output->registry = NULL;
state->output->workspaces = create_list();
return state;
}
void free_workspace(void *item) {
if (!item) {
return;
}
struct workspace *ws = (struct workspace *)item;
if (ws->name) {
free(ws->name);
}
free(ws);
}

43
swaybar/state.h Normal file
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@ -0,0 +1,43 @@
#ifndef _SWAYBAR_STATE_H
#define _SWAYBAR_STATE_H
#include "client/registry.h"
#include "client/window.h"
struct swaybar_state {
struct swaybar_config *config;
struct status_line *status;
struct output *output;
/* list_t *outputs; */
int ipc_event_socketfd;
int ipc_socketfd;
int status_read_fd;
pid_t status_command_pid;
};
struct output {
struct window *window;
struct registry *registry;
list_t *workspaces;
};
struct workspace {
int num;
char *name;
bool focused;
bool visible;
bool urgent;
};
/**
* Initialize state.
*/
struct swaybar_state *init_state();
/**
* free workspace struct.
*/
void free_workspace(void *item);
#endif /* _SWAYBAR_STATE_H */

435
swaybar/status_line.c Normal file
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@ -0,0 +1,435 @@
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <json-c/json.h>
#include "log.h"
#include "config.h"
#include "status_line.h"
#define I3JSON_MAXDEPTH 4
#define I3JSON_UNKNOWN 0
#define I3JSON_ARRAY 1
#define I3JSON_STRING 2
struct {
int bufsize;
char *buffer;
char *line_start;
char *parserpos;
bool escape;
int depth;
int state[I3JSON_MAXDEPTH+1];
} i3json_state = { 0, NULL, NULL, NULL, false, 0, { I3JSON_UNKNOWN } };
static char line[1024];
static char line_rest[1024];
static void free_status_block(void *item) {
if (!item) {
return;
}
struct status_block *sb = (struct status_block*)item;
if (sb->full_text) {
free(sb->full_text);
}
if (sb->short_text) {
free(sb->short_text);
}
if (sb->align) {
free(sb->align);
}
if (sb->name) {
free(sb->name);
}
if (sb->instance) {
free(sb->instance);
}
free(sb);
}
static void parse_json(struct swaybar_state *st, const char *text) {
json_object *results = json_tokener_parse(text);
if (!results) {
sway_log(L_DEBUG, "Failed to parse json");
return;
}
if (json_object_array_length(results) < 1) {
return;
}
if (st->status->block_line) {
list_foreach(st->status->block_line, free_status_block);
list_free(st->status->block_line);
}
st->status->block_line = create_list();
int i;
for (i = 0; i < json_object_array_length(results); ++i) {
json_object *full_text, *short_text, *color, *min_width, *align, *urgent;
json_object *name, *instance, *separator, *separator_block_width;
json_object *background, *border, *border_top, *border_bottom;
json_object *border_left, *border_right;
json_object *json = json_object_array_get_idx(results, i);
if (!json) {
continue;
}
json_object_object_get_ex(json, "full_text", &full_text);
json_object_object_get_ex(json, "short_text", &short_text);
json_object_object_get_ex(json, "color", &color);
json_object_object_get_ex(json, "min_width", &min_width);
json_object_object_get_ex(json, "align", &align);
json_object_object_get_ex(json, "urgent", &urgent);
json_object_object_get_ex(json, "name", &name);
json_object_object_get_ex(json, "instance", &instance);
json_object_object_get_ex(json, "separator", &separator);
json_object_object_get_ex(json, "separator_block_width", &separator_block_width);
json_object_object_get_ex(json, "background", &background);
json_object_object_get_ex(json, "border", &border);
json_object_object_get_ex(json, "border_top", &border_top);
json_object_object_get_ex(json, "border_bottom", &border_bottom);
json_object_object_get_ex(json, "border_left", &border_left);
json_object_object_get_ex(json, "border_right", &border_right);
struct status_block *new = calloc(1, sizeof(struct status_block));
if (full_text) {
new->full_text = strdup(json_object_get_string(full_text));
}
if (short_text) {
new->short_text = strdup(json_object_get_string(short_text));
}
if (color) {
new->color = parse_color(json_object_get_string(color));
} else {
new->color = st->config->colors.statusline;
}
if (min_width) {
json_type type = json_object_get_type(min_width);
if (type == json_type_int) {
new->min_width = json_object_get_int(min_width);
} else if (type == json_type_string) {
/* the width will be calculated when rendering */
new->min_width = 0;
}
}
if (align) {
new->align = strdup(json_object_get_string(align));
} else {
new->align = strdup("left");
}
if (urgent) {
new->urgent = json_object_get_int(urgent);
}
if (name) {
new->name = strdup(json_object_get_string(name));
}
if (instance) {
new->instance = strdup(json_object_get_string(instance));
}
if (separator) {
new->separator = json_object_get_int(separator);
} else {
new->separator = true; // i3bar spec
}
if (separator_block_width) {
new->separator_block_width = json_object_get_int(separator_block_width);
} else {
new->separator_block_width = 9; // i3bar spec
}
// Airblader features
if (background) {
new->background = parse_color(json_object_get_string(background));
} else {
new->background = 0x0; // transparent
}
if (border) {
new->border = parse_color(json_object_get_string(border));
} else {
new->border = 0x0; // transparent
}
if (border_top) {
new->border_top = json_object_get_int(border_top);
} else {
new->border_top = 1;
}
if (border_bottom) {
new->border_bottom = json_object_get_int(border_bottom);
} else {
new->border_bottom = 1;
}
if (border_left) {
new->border_left = json_object_get_int(border_left);
} else {
new->border_left = 1;
}
if (border_right) {
new->border_right = json_object_get_int(border_right);
} else {
new->border_right = 1;
}
list_add(st->status->block_line, new);
}
json_object_put(results);
}
// continue parsing from last parserpos
static int i3json_parse(struct swaybar_state *st) {
char *c = i3json_state.parserpos;
int handled = 0;
while (*c) {
if (i3json_state.state[i3json_state.depth] == I3JSON_STRING) {
if (!i3json_state.escape && *c == '"') {
--i3json_state.depth;
}
i3json_state.escape = !i3json_state.escape && *c == '\\';
} else {
switch (*c) {
case '[':
++i3json_state.depth;
if (i3json_state.depth > I3JSON_MAXDEPTH) {
sway_abort("JSON too deep");
}
i3json_state.state[i3json_state.depth] = I3JSON_ARRAY;
if (i3json_state.depth == 2) {
i3json_state.line_start = c;
}
break;
case ']':
if (i3json_state.state[i3json_state.depth] != I3JSON_ARRAY) {
sway_abort("JSON malformed");
}
--i3json_state.depth;
if (i3json_state.depth == 1) {
// c[1] is valid since c[0] != '\0'
char p = c[1];
c[1] = '\0';
parse_json(st, i3json_state.line_start);
c[1] = p;
++handled;
i3json_state.line_start = c+1;
}
break;
case '"':
++i3json_state.depth;
if (i3json_state.depth > I3JSON_MAXDEPTH) {
sway_abort("JSON too deep");
}
i3json_state.state[i3json_state.depth] = I3JSON_STRING;
break;
}
}
++c;
}
i3json_state.parserpos = c;
return handled;
}
// Read line from file descriptor, only show the line tail if it is too long.
// In non-blocking mode treat "no more data" as a linebreak.
// If data after a line break has been read, return it in rest.
// If rest is non-empty, then use that as the start of the next line.
static int read_line_tail(int fd, char *buf, int nbyte, char *rest) {
if (fd < 0 || !buf || !nbyte) {
return -1;
}
int l;
char *buffer = malloc(nbyte*2+1);
char *readpos = buffer;
char *lf;
// prepend old data to new line if necessary
if (rest) {
l = strlen(rest);
if (l > nbyte) {
strcpy(buffer, rest + l - nbyte);
readpos += nbyte;
} else if (l) {
strcpy(buffer, rest);
readpos += l;
}
}
// read until a linefeed is found or no more data is available
while ((l = read(fd, readpos, nbyte)) > 0) {
readpos[l] = '\0';
lf = strchr(readpos, '\n');
if (lf) {
// linefeed found, replace with \0
*lf = '\0';
// give data from the end of the line, try to fill the buffer
if (lf-buffer > nbyte) {
strcpy(buf, lf - nbyte + 1);
} else {
strcpy(buf, buffer);
}
// we may have read data from the next line, save it to rest
if (rest) {
rest[0] = '\0';
strcpy(rest, lf + 1);
}
free(buffer);
return strlen(buf);
} else {
// no linefeed found, slide data back.
int overflow = readpos - buffer + l - nbyte;
if (overflow > 0) {
memmove(buffer, buffer + overflow , nbyte + 1);
}
}
}
if (l < 0) {
free(buffer);
return l;
}
readpos[l]='\0';
if (rest) {
rest[0] = '\0';
}
if (nbyte < readpos - buffer + l - 1) {
memcpy(buf, readpos - nbyte + l + 1, nbyte);
} else {
strncpy(buf, buffer, nbyte);
}
buf[nbyte-1] = '\0';
free(buffer);
return strlen(buf);
}
// make sure that enough buffer space is available starting from parserpos
static void i3json_ensure_free(int min_free) {
int _step = 10240;
int r = min_free % _step;
if (r) {
min_free += _step - r;
}
if (!i3json_state.buffer) {
i3json_state.buffer = malloc(min_free);
i3json_state.bufsize = min_free;
i3json_state.parserpos = i3json_state.buffer;
} else {
int len = 0;
int pos = 0;
if (i3json_state.line_start) {
len = strlen(i3json_state.line_start);
pos = i3json_state.parserpos - i3json_state.line_start;
if (i3json_state.line_start != i3json_state.buffer) {
memmove(i3json_state.buffer, i3json_state.line_start, len+1);
}
} else {
len = strlen(i3json_state.buffer);
}
if (i3json_state.bufsize < len+min_free) {
i3json_state.bufsize += min_free;
if (i3json_state.bufsize > 1024000) {
sway_abort("Status line json too long or malformed.");
}
i3json_state.buffer = realloc(i3json_state.buffer, i3json_state.bufsize);
if (!i3json_state.buffer) {
sway_abort("Could not allocate json buffer");
}
}
if (i3json_state.line_start) {
i3json_state.line_start = i3json_state.buffer;
i3json_state.parserpos = i3json_state.buffer + pos;
} else {
i3json_state.parserpos = i3json_state.buffer;
}
}
if (!i3json_state.buffer) {
sway_abort("Could not allocate buffer.");
}
}
// append data and parse it.
static int i3json_handle_data(struct swaybar_state *st, char *data) {
int len = strlen(data);
i3json_ensure_free(len);
strcpy(i3json_state.parserpos, data);
return i3json_parse(st);
}
// read data from fd and parse it.
static int i3json_handle_fd(struct swaybar_state *st) {
i3json_ensure_free(10240);
// get fresh data at the end of the buffer
int readlen = read(st->status_read_fd, i3json_state.parserpos, 10239);
if (readlen < 0) {
return readlen;
}
i3json_state.parserpos[readlen] = '\0';
return i3json_parse(st);
}
bool handle_status_line(struct swaybar_state *st) {
bool dirty = false;
switch (st->status->protocol) {
case I3BAR:
sway_log(L_DEBUG, "Got i3bar protocol.");
if (i3json_handle_fd(st) > 0) {
dirty = true;
}
break;
case TEXT:
sway_log(L_DEBUG, "Got text protocol.");
read_line_tail(st->status_read_fd, line, sizeof(line), line_rest);
dirty = true;
st->status->text_line = line;
break;
case UNDEF:
sway_log(L_DEBUG, "Detecting protocol...");
if (read_line_tail(st->status_read_fd, line, sizeof(line), line_rest) < 0) {
break;
}
dirty = true;
st->status->text_line = line;
st->status->protocol = TEXT;
if (line[0] == '{') {
// detect i3bar json protocol
json_object *proto = json_tokener_parse(line);
json_object *version;
if (proto) {
if (json_object_object_get_ex(proto, "version", &version)
&& json_object_get_int(version) == 1
) {
sway_log(L_DEBUG, "Switched to i3bar protocol.");
st->status->protocol = I3BAR;
i3json_handle_data(st, line_rest);
}
json_object_put(proto);
}
}
break;
}
return dirty;
}
struct status_line *init_status_line() {
struct status_line *line = malloc(sizeof(struct status_line));
line->block_line = create_list();
line->text_line = NULL;
line->protocol = UNDEF;
return line;
}

45
swaybar/status_line.h Normal file
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@ -0,0 +1,45 @@
#ifndef _SWAYBAR_STATUS_LINE_H
#define _SWAYBAR_STATUS_LINE_H
#include <stdint.h>
#include <stdbool.h>
#include "list.h"
#include "state.h"
typedef enum {UNDEF, TEXT, I3BAR} command_protocol;
struct status_line {
list_t *block_line;
char *text_line;
command_protocol protocol;
};
struct status_block {
char *full_text, *short_text, *align;
bool urgent;
uint32_t color;
int min_width;
char *name, *instance;
bool separator;
int separator_block_width;
// Airblader features
uint32_t background;
uint32_t border;
int border_top;
int border_bottom;
int border_left;
int border_right;
};
/**
* Initialize status line struct.
*/
struct status_line *init_status_line();
/**
* handle status line activity.
*/
bool handle_status_line(struct swaybar_state *st);
#endif /* _SWAYBAR_STATUS_LINE_H */