started tab moving

3 files changed, 8 insertions, 3 deletions

diff --git a/main.c b/main.c
index 52e5561..ebec863 100644
--- a/main.c
+++ b/main.c
@@ -323,7 +323,7 @@ int main(int argc, char **argv) {
 
 	{
 		u16 buffer_index = (u16)ted_new_buffer(ted);
-		assert(buffer_index == 0);
+		assert(buffer_index == 1);
 		TextBuffer *buffer = &ted->buffers[buffer_index];
 		buffer_create(buffer, ted);
 		ted->active_buffer = buffer;
@@ -331,7 +331,7 @@ int main(int argc, char **argv) {
 		assert(node_index == 0);
 		Node *node = ted->active_node = &ted->nodes[node_index];
 		node->tabs = NULL;
-		arr_add(node->tabs, 0);
+		arr_add(node->tabs, buffer_index);
 
 
 		char path[TED_PATH_MAX];
diff --git a/ted.c b/ted.c
index 5ad3f82..fcc1bb1 100644
--- a/ted.c
+++ b/ted.c
@@ -94,7 +94,8 @@ static void ted_load_fonts(Ted *ted) {
 // returns the index of an available buffer, or -1 if none are available 
 static i32 ted_new_buffer(Ted *ted) {
 	bool *buffers_used = ted->buffers_used;
-	for (i32 i = 0; i < TED_MAX_BUFFERS; ++i) {
+	for (i32 i = 1; // start from 1, so as not to use the null buffer
+		i < TED_MAX_BUFFERS; ++i) {
 		if (!buffers_used[i]) {
 			buffers_used[i] = true;
 			buffer_create(&ted->buffers[i], ted);
diff --git a/ted.h b/ted.h
index 784001f..f92425f 100644
--- a/ted.h
+++ b/ted.h
@@ -280,6 +280,9 @@ typedef struct Ted {
 	SDL_Cursor *cursor_arrow, *cursor_ibeam, *cursor_resize_h, *cursor_resize_v;
 	SDL_Cursor *cursor; // which cursor to use this frame
 	
+	// index of buffer whose tab user is dragging around, 0 for none.
+	u16 dragging_tab;
+	
 	// if not NULL, points to the node whose split the user is currently resizing.
 	Node *resizing_split;
 	
@@ -304,6 +307,7 @@ typedef struct Ted {
 	char tags_dir[TED_PATH_MAX]; // where we are reading tags from
 	bool nodes_used[TED_MAX_NODES];
 	Node nodes[TED_MAX_NODES];
+	// NOTE: the buffer at index 0 is reserved as a "null buffer" and should not be used.
 	bool buffers_used[TED_MAX_BUFFERS];
 	TextBuffer buffers[TED_MAX_BUFFERS];
 	char window_title[256];