From 4f2a012a5dbad755bd621a3308a306afd4589fd5 Mon Sep 17 00:00:00 2001
From: Leo Tenenbaum <pommicket@gmail.com>
Date: Wed, 10 Feb 2021 10:17:06 -0500
Subject: make find+replace more convenient

---
 command.c | 13 ++++++++++++-
 command.h |  2 ++
 find.c    | 54 +++++++++++++++++++++++++++---------------------------
 main.c    |  1 +
 ted.cfg   |  1 +
 5 files changed, 43 insertions(+), 28 deletions(-)

diff --git a/command.c b/command.c
index 19c291e..1d628b0 100644
--- a/command.c
+++ b/command.c
@@ -98,7 +98,18 @@ void command_execute(Ted *ted, Command c, i64 argument) {
 		break;
 
 	case CMD_TAB:
-		buffer_insert_char_at_cursor(buffer, '\t');
+		if (ted->replace && ted->active_buffer == &ted->find_buffer) {
+			ted->active_buffer = &ted->replace_buffer;
+			buffer_select_all(ted->active_buffer);
+		} else {
+			buffer_insert_char_at_cursor(buffer, '\t');
+		}
+		break;
+	case CMD_BACKTAB:
+		if (ted->replace && ted->active_buffer == &ted->replace_buffer) {
+			ted->active_buffer = &ted->find_buffer;
+			buffer_select_all(ted->active_buffer);
+		}
 		break;
 	case CMD_NEWLINE:
 	case CMD_NEWLINE_BACK:
diff --git a/command.h b/command.h
index fcdde38..e366f17 100644
--- a/command.h
+++ b/command.h
@@ -26,6 +26,7 @@ ENUM_U16 {
 
 	// insertion
 	CMD_TAB, // insert '\t'
+	CMD_BACKTAB,
 	CMD_NEWLINE, // insert '\n' + autoindent -- also used to submit line buffers
 	CMD_NEWLINE_BACK,
 
@@ -98,6 +99,7 @@ static CommandName const command_names[CMD_COUNT] = {
 	{"page-up", CMD_PAGE_UP},
 	{"page-down", CMD_PAGE_DOWN},
 	{"tab", CMD_TAB},
+	{"backtab", CMD_BACKTAB},
 	{"newline", CMD_NEWLINE},
 	{"newline-back", CMD_NEWLINE_BACK},
 	{"backspace", CMD_BACKSPACE},
diff --git a/find.c b/find.c
index 6b237f2..48a9299 100644
--- a/find.c
+++ b/find.c
@@ -58,25 +58,6 @@ static void find_free_pattern(Ted *ted) {
 	arr_clear(ted->find_results);
 }
 
-static void find_open(Ted *ted, bool replace) {
-	if (!ted->find && ted->active_buffer) {
-		ted->prev_active_buffer = ted->active_buffer;
-		ted->active_buffer = &ted->find_buffer;
-		ted->find = true;
-		buffer_clear(&ted->find_buffer);
-	}
-	if (!ted->replace && replace) {
-		ted->replace = true;
-		buffer_clear(&ted->replace_buffer);
-	}
-}
-
-static void find_close(Ted *ted) {
-	ted->find = false;
-	ted->active_buffer = ted->prev_active_buffer;
-	find_free_pattern(ted);
-}
-
 static float find_menu_height(Ted *ted) {
 	Font *font = ted->font;
 	float char_height = text_font_char_height(font);
@@ -130,10 +111,11 @@ static WarnUnusedResult bool find_match(Ted *ted, BufferPos *pos, u32 *match_sta
 }
 
 // check if the search term needs to be recompiled
-static void find_update(Ted *ted) {
+static void find_update(Ted *ted, bool force) {
 	TextBuffer *find_buffer = &ted->find_buffer;
 	u32 flags = find_compilation_flags(ted);
-	if (!find_buffer->modified // check if buffer has been modified,
+	if (!force
+		&& !find_buffer->modified // check if buffer has been modified,
 		&& ted->find_flags == flags) // or checkboxes have been (un)checked
 		return;
 	ted->find_flags = flags;
@@ -202,6 +184,9 @@ static void find_next_in_direction(Ted *ted, int direction) {
 
 // returns true if successful
 static bool find_replace_match(Ted *ted, u32 match_idx) {
+	find_update(ted, false);
+	if (!ted->find_code) return false;
+	
 	bool success = false;
 	FindResult match = ted->find_results[match_idx];
 	TextBuffer *buffer = ted->prev_active_buffer;
@@ -268,16 +253,12 @@ static void find_replace(Ted *ted) {
 	
 // go to next find result
 static void find_next(Ted *ted) {
-	find_update(ted);
-	if (!ted->find_code) return;
-	
 	if (ted->replace)
 		find_replace(ted);
 	find_next_in_direction(ted, +1);
 }
 
 static void find_prev(Ted *ted) {
-	find_update(ted);
 	find_next_in_direction(ted, -1);
 }
 
@@ -296,7 +277,7 @@ static void find_replace_all(Ted *ted) {
 				if (!find_replace_match(ted, i))
 					break;
 			}
-			find_update(ted);
+			find_update(ted, true);
 		}
 	}
 }
@@ -363,7 +344,7 @@ static void find_menu_frame(Ted *ted) {
 			find_replace_all(ted);
 	}
 	
-	find_update(ted);
+	find_update(ted, false);
 	arr_foreach_ptr(ted->find_results, FindResult, result) {
 		// highlight matches
 		BufferPos p1 = result->start, p2 = result->end;
@@ -450,3 +431,22 @@ static void find_menu_frame(Ted *ted) {
 	gl_geometry_draw();
 
 }
+
+static void find_open(Ted *ted, bool replace) {
+	if (!ted->find && ted->active_buffer) {
+		ted->prev_active_buffer = ted->active_buffer;
+		ted->active_buffer = &ted->find_buffer;
+		ted->find = true;
+		buffer_select_all(ted->active_buffer);
+	}
+	if (!ted->replace && replace) {
+		ted->replace = true;
+	}
+	find_update(ted, true);
+}
+
+static void find_close(Ted *ted) {
+	ted->find = false;
+	ted->active_buffer = ted->prev_active_buffer;
+	find_free_pattern(ted);
+}
diff --git a/main.c b/main.c
index 7d13359..4036a1f 100644
--- a/main.c
+++ b/main.c
@@ -1,6 +1,7 @@
 // @TODO:
 // - chained undos (replace all = one undo action)
 // - highlight matching parentheses
+// - indent/dedent region
 // - split
 // - completion
 // - view-only
diff --git a/ted.cfg b/ted.cfg
index 24d2e56..60b9929 100644
--- a/ted.cfg
+++ b/ted.cfg
@@ -54,6 +54,7 @@ Ctrl+a = :select-all
 
 # insertion
 Tab = :tab
+Shift+Tab = :backtab
 Enter = :newline
 # same as :newline for normal text insertion, but goes to the previous search result instead of the next one
 Shift+Enter = :newline-back
-- 
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