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293 lines
10 KiB
C
293 lines
10 KiB
C
#define _POSIX_C_SOURCE 200809L
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#include <json-c/json.h>
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#include <linux/input-event-codes.h>
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#include <ctype.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <wlr/util/log.h>
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#include "swaybar/bar.h"
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#include "swaybar/config.h"
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#include "swaybar/i3bar.h"
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#include "swaybar/input.h"
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#include "swaybar/status_line.h"
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void i3bar_block_unref(struct i3bar_block *block) {
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if (block == NULL) {
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return;
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}
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if (--block->ref_count == 0) {
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free(block->full_text);
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free(block->short_text);
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free(block->align);
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free(block->name);
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free(block->instance);
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free(block->color);
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free(block);
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}
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}
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static void i3bar_parse_json(struct status_line *status,
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struct json_object *json_array) {
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struct i3bar_block *block, *tmp;
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wl_list_for_each_safe(block, tmp, &status->blocks, link) {
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wl_list_remove(&block->link);
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i3bar_block_unref(block);
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}
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for (size_t i = 0; i < json_object_array_length(json_array); ++i) {
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json_object *full_text, *short_text, *color, *min_width, *align, *urgent;
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json_object *name, *instance, *separator, *separator_block_width;
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json_object *background, *border, *border_top, *border_bottom;
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json_object *border_left, *border_right, *markup;
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json_object *json = json_object_array_get_idx(json_array, i);
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if (!json) {
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continue;
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}
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json_object_object_get_ex(json, "full_text", &full_text);
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json_object_object_get_ex(json, "short_text", &short_text);
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json_object_object_get_ex(json, "color", &color);
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json_object_object_get_ex(json, "min_width", &min_width);
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json_object_object_get_ex(json, "align", &align);
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json_object_object_get_ex(json, "urgent", &urgent);
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json_object_object_get_ex(json, "name", &name);
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json_object_object_get_ex(json, "instance", &instance);
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json_object_object_get_ex(json, "markup", &markup);
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json_object_object_get_ex(json, "separator", &separator);
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json_object_object_get_ex(json, "separator_block_width", &separator_block_width);
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json_object_object_get_ex(json, "background", &background);
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json_object_object_get_ex(json, "border", &border);
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json_object_object_get_ex(json, "border_top", &border_top);
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json_object_object_get_ex(json, "border_bottom", &border_bottom);
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json_object_object_get_ex(json, "border_left", &border_left);
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json_object_object_get_ex(json, "border_right", &border_right);
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struct i3bar_block *block = calloc(1, sizeof(struct i3bar_block));
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block->ref_count = 1;
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block->full_text = full_text ?
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strdup(json_object_get_string(full_text)) : NULL;
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block->short_text = short_text ?
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strdup(json_object_get_string(short_text)) : NULL;
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if (color) {
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block->color = malloc(sizeof(uint32_t));
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*block->color = parse_color(json_object_get_string(color));
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}
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if (min_width) {
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json_type type = json_object_get_type(min_width);
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if (type == json_type_int) {
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block->min_width = json_object_get_int(min_width);
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} else if (type == json_type_string) {
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/* the width will be calculated when rendering */
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block->min_width = 0;
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}
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}
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block->align = strdup(align ? json_object_get_string(align) : "left");
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block->urgent = urgent ? json_object_get_int(urgent) : false;
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block->name = name ? strdup(json_object_get_string(name)) : NULL;
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block->instance = instance ?
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strdup(json_object_get_string(instance)) : NULL;
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if (markup) {
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block->markup = false;
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const char *markup_str = json_object_get_string(markup);
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if (strcmp(markup_str, "pango") == 0) {
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block->markup = true;
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}
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}
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block->separator = separator ? json_object_get_int(separator) : true;
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block->separator_block_width = separator_block_width ?
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json_object_get_int(separator_block_width) : 9;
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// Airblader features
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block->background = background ?
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parse_color(json_object_get_string(background)) : 0;
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block->border = border ?
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parse_color(json_object_get_string(border)) : 0;
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block->border_top = border_top ? json_object_get_int(border_top) : 1;
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block->border_bottom = border_bottom ?
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json_object_get_int(border_bottom) : 1;
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block->border_left = border_left ? json_object_get_int(border_left) : 1;
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block->border_right = border_right ?
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json_object_get_int(border_right) : 1;
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wl_list_insert(&status->blocks, &block->link);
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}
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}
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bool i3bar_handle_readable(struct status_line *status) {
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while (!status->started) { // look for opening bracket
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for (size_t c = 0; c < status->buffer_index; ++c) {
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if (status->buffer[c] == '[') {
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status->started = true;
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status->buffer_index -= ++c;
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memmove(status->buffer, &status->buffer[c], status->buffer_index);
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break;
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} else if (!isspace(status->buffer[c])) {
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wlr_log(WLR_DEBUG, "Invalid i3bar json: expected '[' but encountered '%c'",
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status->buffer[c]);
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status_error(status, "[invalid i3bar json]");
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return true;
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}
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}
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if (status->started) {
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break;
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}
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errno = 0;
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ssize_t read_bytes = read(status->read_fd, status->buffer, status->buffer_size);
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if (read_bytes > -1) {
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status->buffer_index = read_bytes;
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} else if (errno == EAGAIN) {
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return false;
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} else {
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status_error(status, "[error reading from status command]");
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return true;
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}
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}
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struct json_object *last_object = NULL;
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struct json_object *test_object;
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size_t buffer_pos = 0;
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while (true) {
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// since the incoming stream is an infinite array
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// parsing is split into two parts
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// first, attempt to parse the current object, reading more if the
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// parser indicates that the current object is incomplete, and failing
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// if the parser fails
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// second, look for separating comma, ignoring whitespace, failing if
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// any other characters are encountered
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if (status->expecting_comma) {
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for (; buffer_pos < status->buffer_index; ++buffer_pos) {
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if (status->buffer[buffer_pos] == ',') {
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status->expecting_comma = false;
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++buffer_pos;
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break;
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} else if (!isspace(status->buffer[buffer_pos])) {
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wlr_log(WLR_DEBUG, "Invalid i3bar json: expected ',' but encountered '%c'",
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status->buffer[buffer_pos]);
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status_error(status, "[invalid i3bar json]");
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return true;
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}
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}
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if (buffer_pos < status->buffer_index) {
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continue; // look for new object without reading more input
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}
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buffer_pos = status->buffer_index = 0;
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} else {
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test_object = json_tokener_parse_ex(status->tokener,
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&status->buffer[buffer_pos], status->buffer_index - buffer_pos);
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enum json_tokener_error err = json_tokener_get_error(status->tokener);
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if (err == json_tokener_success) {
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if (json_object_get_type(test_object) == json_type_array) {
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if (last_object) {
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json_object_put(last_object);
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}
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last_object = test_object;
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} else {
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json_object_put(test_object);
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}
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// in order to print the json for debugging purposes
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// the last character is temporarily replaced with a null character
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// (the last character is used in case the buffer is full)
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char *last_char_pos =
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&status->buffer[buffer_pos + status->tokener->char_offset - 1];
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char last_char = *last_char_pos;
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while (isspace(last_char)) {
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last_char = *--last_char_pos;
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}
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*last_char_pos = '\0';
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size_t offset = strspn(&status->buffer[buffer_pos], " \f\n\r\t\v");
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wlr_log(WLR_DEBUG, "Received i3bar json: '%s%c'",
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&status->buffer[buffer_pos + offset], last_char);
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*last_char_pos = last_char;
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buffer_pos += status->tokener->char_offset;
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status->expecting_comma = true;
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if (buffer_pos < status->buffer_index) {
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continue; // look for comma without reading more input
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}
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buffer_pos = status->buffer_index = 0;
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} else if (err == json_tokener_continue) {
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json_tokener_reset(status->tokener);
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if (status->buffer_index < status->buffer_size) {
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// move the object to the start of the buffer
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status->buffer_index -= buffer_pos;
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memmove(status->buffer, &status->buffer[buffer_pos],
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status->buffer_index);
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buffer_pos = 0;
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} else {
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// expand buffer
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status->buffer_size *= 2;
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char *new_buffer = realloc(status->buffer, status->buffer_size);
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if (new_buffer) {
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status->buffer = new_buffer;
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} else {
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free(status->buffer);
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status_error(status, "[failed to allocate buffer]");
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return true;
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}
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}
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} else {
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char last_char = status->buffer[status->buffer_index - 1];
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status->buffer[status->buffer_index - 1] = '\0';
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wlr_log(WLR_DEBUG, "Failed to parse i3bar json - %s: '%s%c'",
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json_tokener_error_desc(err), &status->buffer[buffer_pos], last_char);
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status_error(status, "[failed to parse i3bar json]");
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return true;
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}
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}
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errno = 0;
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ssize_t read_bytes = read(status->read_fd, &status->buffer[status->buffer_index],
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status->buffer_size - status->buffer_index);
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if (read_bytes > -1) {
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status->buffer_index += read_bytes;
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} else if (errno == EAGAIN) {
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break;
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} else {
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status_error(status, "[error reading from status command]");
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return true;
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}
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}
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if (last_object) {
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wlr_log(WLR_DEBUG, "Rendering last received json");
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i3bar_parse_json(status, last_object);
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json_object_put(last_object);
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return true;
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} else {
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return false;
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}
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}
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enum hotspot_event_handling i3bar_block_send_click(struct status_line *status,
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struct i3bar_block *block, int x, int y, int rx, int ry, int w, int h,
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enum x11_button button) {
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wlr_log(WLR_DEBUG, "block %s clicked", block->name);
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if (!block->name || !status->click_events) {
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return HOTSPOT_PROCESS;
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}
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struct json_object *event_json = json_object_new_object();
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json_object_object_add(event_json, "name",
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json_object_new_string(block->name));
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if (block->instance) {
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json_object_object_add(event_json, "instance",
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json_object_new_string(block->instance));
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}
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json_object_object_add(event_json, "button", json_object_new_int(button));
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json_object_object_add(event_json, "x", json_object_new_int(x));
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json_object_object_add(event_json, "y", json_object_new_int(y));
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json_object_object_add(event_json, "relative_x", json_object_new_int(rx));
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json_object_object_add(event_json, "relative_y", json_object_new_int(ry));
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json_object_object_add(event_json, "width", json_object_new_int(w));
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json_object_object_add(event_json, "height", json_object_new_int(h));
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if (dprintf(status->write_fd, "%s%s\n", status->clicked ? "," : "",
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json_object_to_json_string(event_json)) < 0) {
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status_error(status, "[failed to write click event]");
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}
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status->clicked = true;
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json_object_put(event_json);
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return HOTSPOT_IGNORE;
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}
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