From 94e09c98f3dbef3c041750cc019efbc29e9254e6 Mon Sep 17 00:00:00 2001
From: Leo Tenenbaum <pommicket@gmail.com>
Date: Wed, 24 Feb 2021 11:48:54 -0500
Subject: start split

---
 colors.h  |  2 ++
 command.c | 22 +++++++++++++++++-----
 main.c    |  8 ++++++--
 node.c    | 14 ++++++--------
 ted.cfg   |  2 ++
 5 files changed, 33 insertions(+), 15 deletions(-)

diff --git a/colors.h b/colors.h
index a5139c7..e1f033c 100644
--- a/colors.h
+++ b/colors.h
@@ -21,6 +21,7 @@ ENUM_U16 {
 	COLOR_ERROR_BG,
 	COLOR_ERROR_BORDER,
 	COLOR_ACTIVE_TAB_HL,
+	COLOR_SELECTED_TAB_HL,
 	COLOR_FIND_HL,
 
 	COLOR_YES,
@@ -70,6 +71,7 @@ static ColorName const color_names[COLOR_COUNT] = {
 	{COLOR_ERROR_BG, "error-bg"},
 	{COLOR_ERROR_BORDER, "error-border"},
 	{COLOR_ACTIVE_TAB_HL, "active-tab-hl"},
+	{COLOR_SELECTED_TAB_HL, "selected-tab-hl"},
 	{COLOR_FIND_HL, "find-hl"},
 	{COLOR_KEYWORD, "keyword"},
 	{COLOR_BUILTIN, "builtin"},
diff --git a/command.c b/command.c
index fd6334c..e9ffd75 100644
--- a/command.c
+++ b/command.c
@@ -310,20 +310,32 @@ void command_execute(Ted *ted, Command c, i64 argument) {
 
 	case CMD_SPLIT_HORIZONTAL:
 	case CMD_SPLIT_VERTICAL:
-
-#if 0
 		if (node) {
 			if (arr_len(node->tabs) > 1) { // need at least 2 tabs to split
 				i32 left_idx = ted_new_node(ted);
 				i32 right_idx = ted_new_node(ted);
-				if (left >= 0 && right >= 0) {
+				if (left_idx >= 0 && right_idx >= 0) {
 					Node *left = &ted->nodes[left_idx];
 					Node *right = &ted->nodes[right_idx];
-					arr_add(right->tabs, )
+					u16 active_tab = node->active_tab;
+					// put active tab on the right
+					arr_add(right->tabs, node->tabs[active_tab]);
+					for (u32 i = 0; i < arr_len(node->tabs); ++i) {
+						if (i != active_tab) {
+							// put all other tabs on the left
+							arr_add(left->tabs, node->tabs[i]);
+						}
+					}
+
+					arr_clear(node->tabs);
+					node->split_a = (u16)left_idx;
+					node->split_b = (u16)right_idx;
+					node->split_vertical = c == CMD_SPLIT_VERTICAL;
+					node->split_pos = 0.5f;
+					ted->active_node = &ted->nodes[right_idx];
 				}
 			}
 		}
-		#endif
 		break;
 	}
 }
diff --git a/main.c b/main.c
index 58a98b0..76b17a7 100644
--- a/main.c
+++ b/main.c
@@ -1,5 +1,7 @@
 // @TODO:
-// - split
+// - get ctrl+w to work properly
+// - split depth limit
+// - resize split (i.e. change split_pos)
 
 // - Windows installation
 // - on crash, output backtrace to log
@@ -437,8 +439,10 @@ int main(int argc, char **argv) {
 									BufferPos buffer_pos;
 									if (buffer_pixels_to_pos(buffer, pos, &buffer_pos)) {
 										// user clicked on buffer
-										if (!ted->menu)
+										if (!ted->menu) {
 											ted->active_buffer = buffer;
+											ted->active_node = node;
+										}
 										if (buffer == ted->active_buffer) {
 											add = false;
 											switch (ted->key_modifier) {
diff --git a/node.c b/node.c
index d9e04a1..f30cb42 100644
--- a/node.c
+++ b/node.c
@@ -101,7 +101,9 @@ static void node_frame(Ted *ted, Node *node, Rect r) {
 				for (u16 c = 0; c < ted->nmouse_clicks[SDL_BUTTON_LEFT]; ++c) {
 					v2 click = ted->mouse_clicks[SDL_BUTTON_LEFT][c];
 					if (rect_contains_point(tab_bar_rect, click)) {
+						// click on tab to switch to it
 						u16 tab_index = (u16)((click.x - r.pos.x) / tab_width);
+						ted->active_node = node;
 						node_switch_to_tab(ted, node, tab_index);
 					}
 				}
@@ -156,7 +158,7 @@ static void node_frame(Ted *ted, Node *node, Rect r) {
 
 				if (i == node->active_tab) {
 					// highlight active tab
-					gl_geometry_rect(tab_rect, colors[is_active ? COLOR_ACTIVE_TAB_HL : COLOR_HL]);
+					gl_geometry_rect(tab_rect, colors[is_active ? COLOR_ACTIVE_TAB_HL : COLOR_SELECTED_TAB_HL]);
 					// set window title to active tab's title
 					strbuf_printf(ted->window_title, "ted %s", tab_title);
 				}
@@ -173,14 +175,11 @@ static void node_frame(Ted *ted, Node *node, Rect r) {
 		buffer_rect.size.y -= tab_bar_height;
 		buffer_render(buffer, buffer_rect);
 	} else {
-
-#if 0
-	// @TODO: test this
 		// this node is a split
 		Node *a = &ted->nodes[node->split_a];
 		Node *b = &ted->nodes[node->split_b];
 		Rect r1 = r, r2 = r;
-		if (node->vertical_split) {
+		if (node->split_vertical) {
 			float split_pos = r.size.y * node->split_pos;
 			r1.size.y = split_pos;
 			r2.pos.y += split_pos;
@@ -191,9 +190,8 @@ static void node_frame(Ted *ted, Node *node, Rect r) {
 			r2.pos.x += split_pos;
 			r2.size.x = r.size.x - split_pos;
 		}
-		node_render(ted, a, r1);
-		node_render(ted, b, r2);
-#endif
+		node_frame(ted, a, r1);
+		node_frame(ted, b, r2);
 	}
 }
 
diff --git a/ted.cfg b/ted.cfg
index dd3c365..da4a1a3 100644
--- a/ted.cfg
+++ b/ted.cfg
@@ -129,6 +129,8 @@ Escape = :escape
 [colors]
 border = #a77
 active-tab-hl = #a77a
+# this color is used for tabs which are selected, but not active (because you are on the other side of a split, perhaps)
+selected-tab-hl = #7777
 cursor-line-bg = #222
 cursor = #3ff
 # color to highlight matching brackets with
-- 
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