Implement support for settings

Settings are a flat "dictionary" containing
paths to settings on the format:

<category>.<sub-category>.<setting>.

1 files changed, 11 insertions, 2 deletions

diff --git a/src/buffer.c b/src/buffer.c
index 60ef0f4..2decdea 100644
--- a/src/buffer.c
+++ b/src/buffer.c
@@ -4,6 +4,7 @@
 #include "errno.h"
 #include "minibuffer.h"
 #include "reactor.h"
+#include "settings.h"
 #include "utf8.h"
 
 #include <fcntl.h>
@@ -149,6 +150,12 @@ void buffer_clear(struct buffer *buffer) {
   buffer->dot.col = buffer->dot.line = 0;
 }
 
+void buffer_static_init() {
+  settings_register_setting(
+      "editor.tab-width",
+      (struct setting_value){.type = Setting_Number, .number_value = 4});
+}
+
 void buffer_static_teardown() {
   for (uint32_t i = 0; i < KILL_RING_SZ; ++i) {
     if (g_kill_ring.buffer[i].allocated) {
@@ -585,8 +592,10 @@ void buffer_newline(struct buffer *buffer) {
 }
 
 void buffer_indent(struct buffer *buffer) {
-  // TODO: config
-  buffer_add_text(buffer, (uint8_t *)"    ", 4);
+  struct setting *setting = settings_get("editor.tab-width");
+  buffer_add_text(
+      buffer, (uint8_t *)"                ",
+      setting->value.number_value > 16 ? 16 : setting->value.number_value);
 }
 
 uint32_t buffer_add_update_hook(struct buffer *buffer, update_hook_cb hook,