From 56db8bd8d28bd5e83d3bc33ebfc74b610ceed38a Mon Sep 17 00:00:00 2001
From: Kyle Isom <kyle@imap.cc>
Date: Tue, 25 Nov 2025 00:47:06 -0800
Subject: [PATCH] Indent region, version bump.

---
 CMakeLists.txt |  2 +-
 README.txt     |  3 +++
 default.nix    |  2 +-
 main.c         | 73 +++++++++++++++++++++++++++++++++++++++++---------
 4 files changed, 66 insertions(+), 14 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index b56bd5d..7c37a86 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -2,7 +2,7 @@ cmake_minimum_required(VERSION 3.15)
 project(ke C)  # Specify C language explicitly
 
 set(CMAKE_C_STANDARD 99)
-set(KE_VERSION "1.3.4")
+set(KE_VERSION "1.3.5")
 
 set(CMAKE_C_FLAGS "-Wall -Wextra -pedantic -Wshadow -Werror -std=c99 -g")
 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D_DEFAULT_SOURCE -D_XOPEN_SOURCE")
diff --git a/README.txt b/README.txt
index 799f403..feb54dd 100644
--- a/README.txt
+++ b/README.txt
@@ -16,3 +16,6 @@ To get verbose ASAN messages:
     export LSAN_OPTIONS=verbosity=1:log_threads=1
 
 Released under an ISC license.
+
+Started by following along with kilo:
+    https://viewsourcecode.org/snaptoken/kilo/
diff --git a/default.nix b/default.nix
index 9fef89d..931359c 100644
--- a/default.nix
+++ b/default.nix
@@ -6,7 +6,7 @@
 }:
 stdenv.mkDerivation {
   pname = "ke";
-  version = "1.3.4";
+  version = "1.3.5";
 
   src = lib.cleanSource ./.;
 
diff --git a/main.c b/main.c
index 6d22f0d..67f85cf 100644
--- a/main.c
+++ b/main.c
@@ -2,11 +2,7 @@
  * kyle's editor
  *
  * first version is a run-through of the kilo editor walkthrough as a
- * set of guiderails. I've made a lot of changes and did some things
- * differently. keep an eye for for kte, kyle's text editor - the
- * rewrite that will be coming out... when it comes out.
- *
- * https://viewsourcecode.org/snaptoken/kilo/
+ * set of guiderails. I've made a lot of changes.
  */
 #include <sys/ioctl.h>
 
@@ -156,6 +152,7 @@ void		 killring_append_char(unsigned char ch);
 void		 killring_prepend_char(unsigned char ch);
 void		 toggle_markset(void);
 int		 cursor_after_mark(void);
+void		 indent_region(void);
 
 /* miscellaneous */
 void		 die(const char *s);
@@ -791,6 +788,50 @@ kill_region(void)
 }
 
 
+void
+indent_region(void)
+{
+	int start_row, end_row;
+	int i;
+
+	if (!editor.mark_set) {
+		return;
+	}
+
+	if (editor.mark_cury < editor.cury) {
+		start_row = editor.mark_cury;
+		end_row = editor.cury;
+	} else if (editor.mark_cury > editor.cury) {
+		start_row = editor.cury;
+		end_row = editor.mark_cury;
+	} else {
+		start_row = end_row = editor.cury;
+	}
+
+	/* Ensure bounds are valid */
+	if (start_row < 0) {
+		start_row = 0;
+	}
+
+	if (end_row >= editor.nrows) {
+		end_row = editor.nrows - 1;
+	}
+
+	if (start_row >= editor.nrows || end_row < 0) {
+		return;
+	}
+
+	/* Prepend a tab character to every row in the region */
+	for (i = start_row; i <= end_row; i++) {
+		row_insert_ch(&editor.row[i], 0, '\t');
+	}
+
+	/* Move cursor to beginning of the line it was on */
+	editor.curx = 0;
+	editor.dirty++;
+}
+
+
 /* call after kill_region */
 void
 delete_region(void)
@@ -1741,7 +1782,10 @@ newline(void)
 {
 	struct erow *row = NULL;
 
-	if (editor.curx == 0) {
+	if (editor.cury >= editor.nrows) {
+		/* At or past end of file, insert empty line */
+		erow_insert(editor.cury, "", 0);
+	} else if (editor.curx == 0) {
 		erow_insert(editor.cury, "", 0);
 	} else {
 		row = &editor.row[editor.cury];
@@ -1968,12 +2012,17 @@ process_normal(int16_t c)
 		case ESC_KEY:
 			editor.mode = MODE_ESCAPE;
 			break;
-		default:
-			/* Insert any printable byte: ASCII 0x20–0x7E and all bytes >=0x80. */
-			if ((c == TAB_KEY) || (c >= 0x20 && c != 0x7f)) {
-				insertch(c);
-			}
-			break;
+ 	default:
+ 		if (c == TAB_KEY) {
+ 			if (editor.mark_set) {
+ 				indent_region();
+ 			} else {
+ 				insertch(c);
+ 			}
+ 		} else if (c >= 0x20 && c != 0x7f) {
+ 			insertch(c);
+ 		}
+ 		break;
 	}
 
 	editor.dirtyex = 1;