feat: Add support for block-specific icons

Icons can now be specified on a per-block basis. Closes #64.

README.md

@@ -90,8 +90,8 @@ You can define your status bar blocks in `config.h`:
 ```c
 #define BLOCKS(X) \
     ...
-    X("volume", 0, 5), \
-    X("date", 1800, 1), \
+    X(" ", "wpctl get-volume @DEFAULT_AUDIO_SINK@ | cut -d' ' -f2", 0, 5) \
+    X("󰥔 ", "date '+%H:%M:%S'", 1, 1) \
     ...
 ```
 
@@ -99,6 +99,7 @@ Each block has the following properties:
 
 | Property        | Description                                                                                                                                        |
 | --------------- | -------------------------------------------------------------------------------------------------------------------------------------------------- |
+| Icon            | An icon you wish to prepend to your block output.                                                                                                  |
 | Command         | The command you wish to execute in your block.                                                                                                     |
 | Update interval | Time in seconds, after which you want the block to update. If `0`, the block will never be updated.                                                |
 | Update signal   | Signal to be used for triggering the block. Must be a positive integer. If `0`, a signal won't be set up for the block and it will be unclickable. |

config.h

@@ -16,17 +16,17 @@
 // Control whether a trailing delimiter should be appended to the status.
 #define TRAILING_DELIMITER 0
 
-// Define blocks for the status feed as X(cmd, interval, signal).
+// Define blocks for the status feed as X(icon, cmd, interval, signal).
 #define BLOCKS(X)             \
-    X("sb-mail", 600, 1)  \
-    X("sb-music", 0, 2)   \
-    X("sb-disk", 1800, 3) \
-    X("sb-memory", 10, 4) \
-    X("sb-loadavg", 5, 5) \
-    X("sb-mic", 0, 6)     \
-    X("sb-record", 0, 7)  \
-    X("sb-volume", 0, 8)  \
-    X("sb-battery", 5, 9) \
-    X("sb-date", 1, 10)
+    X("", "sb-mail", 600, 1)  \
+    X("", "sb-music", 0, 2)   \
+    X("", "sb-disk", 1800, 3) \
+    X("", "sb-memory", 10, 4) \
+    X("", "sb-loadavg", 5, 5) \
+    X("", "sb-mic", 0, 6)     \
+    X("", "sb-record", 0, 7)  \
+    X("", "sb-volume", 0, 8)  \
+    X("", "sb-battery", 5, 9) \
+    X("", "sb-date", 1, 10)
 
 #endif  // CONFIG_H

include/block.h

@@ -9,6 +9,7 @@
 #include "util.h"
 
 typedef struct {
+    const char *const icon;
     const char *const command;
     const unsigned int interval;
     const int signal;
@@ -18,8 +19,8 @@ typedef struct {
     pid_t fork_pid;
 } block;
 
-block block_new(const char *const command, const unsigned int interval,
-                const int signal);
+block block_new(const char *const icon, const char *const command,
+                const unsigned int interval, const int signal);
 int block_init(block *const block);
 int block_deinit(block *const block);
 int block_execute(block *const block, const uint8_t button);

src/block.c

@@ -13,9 +13,10 @@
 #include "config.h"
 #include "util.h"
 
-block block_new(const char *const command, const unsigned int interval,
-                const int signal) {
+block block_new(const char *const icon, const char *const command,
+                const unsigned int interval, const int signal) {
     block block = {
+        .icon = icon,
         .command = command,
         .interval = interval,
         .signal = signal,

src/main.c

@@ -128,7 +128,8 @@ int main(const int argc, const char *const argv[]) {
         return 1;
     }
 
-#define BLOCK(command, interval, signal) block_new(command, interval, signal),
+#define BLOCK(icon, command, interval, signal) \
+    block_new(icon, command, interval, signal),
     block blocks[BLOCK_COUNT] = {BLOCKS(BLOCK)};
 #undef BLOCK
     const unsigned short block_count = LEN(blocks);

src/status.c

@@ -49,6 +49,7 @@ bool status_update(status *const status) {
             }
 #endif
 
+            (void)strncat(status->current, block->icon, LEN(block->output));
             (void)strncat(status->current, block->output, LEN(block->output));
         }
     }