Indent region, version bump.

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 "1.3.3")
+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")

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/

default.nix

@@ -6,7 +6,7 @@
 }:
 stdenv.mkDerivation {
   pname = "ke";
-  version = "1.3.3";
+  version = "1.3.5";
 
   src = lib.cleanSource ./.;
 

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>
 
@@ -21,6 +17,7 @@
 #include <string.h>
 #include <locale.h>
 #include <wchar.h>
+#include <wctype.h>
 #include <termios.h>
 #include <time.h>
 #include <unistd.h>
@@ -155,6 +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);
@@ -790,6 +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)
@@ -874,11 +916,13 @@ goto_line(void)
 	if (lineno < 1 || lineno >= editor.nrows) {
 		editor_set_status("Line number must be between 1 and %d.",
 		                  editor.nrows);
+		free(query);
 		return;
 	}
 
 	editor.cury = lineno - 1;
 	editor.rowoffs = editor.cury - (editor.rows / 2);
+	free(query);
 }
 
 
@@ -1439,17 +1483,17 @@ get_keypress(void)
 char *
 editor_prompt(char *prompt, void (*cb)(char *, int16_t))
 {
-	size_t bufsz 	= 128;
-	char *buf	= malloc(bufsz);
-	size_t buflen	= 0;
-	int16_t		c;
+	size_t bufsz = 128;
+	char *buf = malloc(bufsz);
+	size_t buflen = 0;
+	int16_t c;
 
 	buf[0] = '\0';
 
 	while (1) {
 		editor_set_status(prompt, buf);
 		display_refresh();
-		while ((c = get_keypress()) <= 0) ;
+		while ((c = get_keypress()) <= 0);
 		if (c == DEL_KEY || c == CTRL_KEY('h') || c == BACKSPACE) {
 			if (buflen != 0) {
 				buf[--buflen] = '\0';
@@ -1469,7 +1513,7 @@ editor_prompt(char *prompt, void (*cb)(char *, int16_t))
 				}
 				return buf;
 			}
-		} else if ((c == TAB_KEY) || (c >= 0x20 && c != 0x7f)) {
+		} else if ((c == TAB_KEY) || (c >= 0x20 && c < 0x7f)) {
 			if (buflen == bufsz - 1) {
 				bufsz *= 2;
 				buf = realloc(buf, bufsz);
@@ -1587,6 +1631,41 @@ editor_openfile(void)
 }
 
 
+int
+first_nonwhitespace(struct erow *row)
+{
+	int pos;
+	wchar_t wc;
+	mbstate_t state;
+	size_t len;
+
+	if (row == NULL) {
+		return 0;
+	}
+
+	memset(&state, 0, sizeof(state));
+	pos = 0;
+	while (pos < row->size) {
+		len = mbrtowc(&wc, &row->line[pos], row->size - pos, &state);
+		if (len == (size_t) -1 || len == (size_t) -2) {
+			/* Invalid or incomplete sequence, stop here */
+			break;
+		}
+		if (len == 0) {
+			/* Null character, stop here */
+			break;
+		}
+		if (!iswspace(wc)) {
+			/* Found non-whitespace character */
+			break;
+		}
+		pos += len;
+	}
+
+	return pos;
+}
+
+
 void
 move_cursor(int16_t c)
 {
@@ -1596,86 +1675,97 @@ move_cursor(int16_t c)
 	row = (editor.cury >= editor.nrows) ? NULL : &editor.row[editor.cury];
 
 	switch (c) {
-		case ARROW_UP:
-		case CTRL_KEY('p'):
-			if (editor.cury > 0) {
-				editor.cury--;
-			}
-			break;
-		case ARROW_DOWN:
-		case CTRL_KEY('n'):
-			if (editor.cury < editor.nrows) {
-				editor.cury++;
-			}
-			break;
-		case ARROW_RIGHT:
-		case CTRL_KEY('f'):
-			if (row && editor.curx < row->size) {
+	case ARROW_UP:
+	case CTRL_KEY('p'):
+		if (editor.cury > 0) {
+			editor.cury--;
+			row = (editor.cury >= editor.nrows)
+				      ? NULL
+				      : &editor.row[editor.cury];
+			editor.curx = first_nonwhitespace(row);
+		}
+		break;
+	case ARROW_DOWN:
+	case CTRL_KEY('n'):
+		if (editor.cury < editor.nrows) {
+			editor.cury++;
+			row = (editor.cury >= editor.nrows)
+				      ? NULL
+				      : &editor.row[editor.cury];
+			editor.curx = first_nonwhitespace(row);
+		}
+		break;
+	case ARROW_RIGHT:
+	case CTRL_KEY('f'):
+		if (row && editor.curx < row->size) {
+			editor.curx++;
+			/* skip over UTF-8 continuation bytes */
+			while (row && editor.curx < row->size &&
+			       ((unsigned char) row->line[editor.curx] &
+			        0xC0) == 0x80) {
 				editor.curx++;
-				/* skip over UTF-8 continuation bytes */
-				while (row && editor.curx < row->size &&
-				       ((unsigned char) row->line[editor.curx] &
-				        0xC0) == 0x80) {
-					editor.curx++;
-				}
-			} else if (row && editor.curx == row->size) {
-				editor.cury++;
-				editor.curx = 0;
 			}
-			break;
-		case ARROW_LEFT:
-		case CTRL_KEY('b'):
-			if (editor.curx > 0) {
+		} else if (row && editor.curx == row->size) {
+			editor.cury++;
+			row = (editor.cury >= editor.nrows)
+				      ? NULL
+				      : &editor.row[editor.cury];
+			editor.curx = first_nonwhitespace(row);
+		}
+		break;
+	case ARROW_LEFT:
+	case CTRL_KEY('b'):
+		if (editor.curx > 0) {
+			editor.curx--;
+			/* move to the start byte if we landed on a continuation */
+			while (editor.curx > 0 &&
+			       ((unsigned char) row->line[editor.curx] &
+			        0xC0) == 0x80) {
 				editor.curx--;
-				/* move to the start byte if we landed on a continuation */
-				while (editor.curx > 0 &&
-				       ((unsigned char) row->line[editor.curx] &
-				        0xC0) == 0x80) {
-					editor.curx--;
-				}
-			} else if (editor.cury > 0) {
-				editor.cury--;
-				editor.curx = editor.row[editor.cury].size;
-				/* ensure at a codepoint boundary at end of previous line */
-				row = &editor.row[editor.cury];
-				while (editor.curx > 0 &&
-				       ((unsigned char) row->line[editor.curx] &
-				        0xC0) == 0x80) {
-					editor.curx--;
-				}
-			}
-			break;
-		case PG_UP:
-		case PG_DN:
-			if (c == PG_UP) {
-				editor.cury = editor.rowoffs;
-			} else if (c == PG_DN) {
-				editor.cury = editor.rowoffs + editor.rows - 1;
-				if (editor.cury > editor.nrows) {
-					editor.cury = editor.nrows;
-				}
-			}
-
-			reps = editor.rows;
-			while (--reps) {
-				move_cursor(c == PG_UP ? ARROW_UP : ARROW_DOWN);
-			}
-
-			break;
-
-		case HOME_KEY:
-		case CTRL_KEY('a'):
-			editor.curx = 0;
-			break;
-		case END_KEY:
-		case CTRL_KEY('e'):
-			if (editor.nrows == 0) {
-				break;
 			}
+		} else if (editor.cury > 0) {
+			editor.cury--;
 			editor.curx = editor.row[editor.cury].size;
+			/* ensure at a codepoint boundary at end of previous line */
+			row = &editor.row[editor.cury];
+			while (editor.curx > 0 &&
+			       ((unsigned char) row->line[editor.curx] &
+			        0xC0) == 0x80) {
+				editor.curx--;
+			}
+		}
+		break;
+	case PG_UP:
+	case PG_DN:
+		if (c == PG_UP) {
+			editor.cury = editor.rowoffs;
+		} else if (c == PG_DN) {
+			editor.cury = editor.rowoffs + editor.rows - 1;
+			if (editor.cury > editor.nrows) {
+				editor.cury = editor.nrows;
+			}
+		}
+
+		reps = editor.rows;
+		while (--reps) {
+			move_cursor(c == PG_UP ? ARROW_UP : ARROW_DOWN);
+		}
+
+		break;
+
+	case HOME_KEY:
+	case CTRL_KEY('a'):
+		editor.curx = 0;
+		break;
+	case END_KEY:
+	case CTRL_KEY('e'):
+		if (editor.nrows == 0) {
 			break;
-		default:
-			break;
+		}
+		editor.curx = editor.row[editor.cury].size;
+		break;
+	default:
+		break;
 	}
 
 
@@ -1692,7 +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];
@@ -1919,12 +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;