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author | Drew DeVault <sir@cmpwn.com> | 2018-03-31 13:07:22 -0400 |
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committer | Drew DeVault <sir@cmpwn.com> | 2018-04-02 11:09:23 -0400 |
commit | ee85c918317ec6a685a999db46f692c7d13cdf2a (patch) | |
tree | 34afb98bc7fccb8ea6d215c710579e62a459cb62 /swaybar/i3bar.c | |
parent | Merge pull request #1684 from swaywm/follow-warp (diff) | |
download | sway-ee85c918317ec6a685a999db46f692c7d13cdf2a.tar.gz sway-ee85c918317ec6a685a999db46f692c7d13cdf2a.tar.zst sway-ee85c918317ec6a685a999db46f692c7d13cdf2a.zip |
Demarcate i3bar JSON into individual updates
Diffstat (limited to 'swaybar/i3bar.c')
-rw-r--r-- | swaybar/i3bar.c | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/swaybar/i3bar.c b/swaybar/i3bar.c new file mode 100644 index 00000000..5be348b2 --- /dev/null +++ b/swaybar/i3bar.c | |||
@@ -0,0 +1,88 @@ | |||
1 | #include <stdlib.h> | ||
2 | #include <string.h> | ||
3 | #include <unistd.h> | ||
4 | #include <wlr/util/log.h> | ||
5 | #include "swaybar/config.h" | ||
6 | #include "swaybar/status_line.h" | ||
7 | |||
8 | static void i3bar_parse_json(struct status_line *status, const char *text) { | ||
9 | wlr_log(L_DEBUG, "got json: %s", text); | ||
10 | } | ||
11 | |||
12 | int i3bar_readable(struct status_line *status) { | ||
13 | struct i3bar_protocol_state *state = &status->i3bar_state; | ||
14 | |||
15 | char *cur = &state->buffer[state->buffer_index]; | ||
16 | ssize_t n = read(status->read_fd, cur, | ||
17 | state->buffer_size - state->buffer_index); | ||
18 | if (n == 0) { | ||
19 | return 0; | ||
20 | } | ||
21 | |||
22 | if (n == (ssize_t)(state->buffer_size - state->buffer_index)) { | ||
23 | state->buffer_size = state->buffer_size * 2; | ||
24 | char *new_buffer = realloc(state->buffer, state->buffer_size); | ||
25 | if (!new_buffer) { | ||
26 | free(state->buffer); | ||
27 | status_error(status, "[failed to allocate buffer]"); | ||
28 | return -1; | ||
29 | } | ||
30 | state->buffer = new_buffer; | ||
31 | } | ||
32 | |||
33 | int handled = 0; | ||
34 | while (*cur) { | ||
35 | if (state->nodes[state->depth] == JSON_NODE_STRING) { | ||
36 | if (!state->escape && *cur == '"') { | ||
37 | --state->depth; | ||
38 | } | ||
39 | state->escape = !state->escape && *cur == '\\'; | ||
40 | } else { | ||
41 | switch (*cur) { | ||
42 | case '[': | ||
43 | ++state->depth; | ||
44 | if (state->depth > | ||
45 | sizeof(state->nodes) / sizeof(state->nodes[0])) { | ||
46 | status_error(status, "[i3bar json too deep]"); | ||
47 | return -1; | ||
48 | } | ||
49 | state->nodes[state->depth] = JSON_NODE_ARRAY; | ||
50 | if (state->depth == 1) { | ||
51 | state->current_node = cur; | ||
52 | } | ||
53 | break; | ||
54 | case ']': | ||
55 | if (state->nodes[state->depth] != JSON_NODE_ARRAY) { | ||
56 | status_error(status, "[failed to parse i3bar json]"); | ||
57 | return -1; | ||
58 | } | ||
59 | --state->depth; | ||
60 | if (state->depth == 0) { | ||
61 | // cur[1] is valid since cur[0] != '\0' | ||
62 | char p = cur[1]; | ||
63 | cur[1] = '\0'; | ||
64 | i3bar_parse_json(status, state->current_node); | ||
65 | cur[1] = p; | ||
66 | memmove(state->buffer, cur, | ||
67 | state->buffer_size - (cur - state->buffer)); | ||
68 | ++handled; | ||
69 | cur = state->buffer; | ||
70 | state->current_node = cur + 1; | ||
71 | } | ||
72 | break; | ||
73 | case '"': | ||
74 | ++state->depth; | ||
75 | if (state->depth > | ||
76 | sizeof(state->nodes) / sizeof(state->nodes[0])) { | ||
77 | status_error(status, "[i3bar json too deep]"); | ||
78 | return -1; | ||
79 | } | ||
80 | state->nodes[state->depth] = JSON_NODE_STRING; | ||
81 | break; | ||
82 | } | ||
83 | } | ||
84 | ++cur; | ||
85 | } | ||
86 | state->buffer_index = cur - state->buffer; | ||
87 | return handled; | ||
88 | } | ||