implemented most of selection backspace

odit.sublime-project

@@ -20,7 +20,9 @@
 	],
 	"folders": [
 		{
-			"path": "."
-		}
+			"path": ".",
+			"folder_exclude_patterns": ["*bin*"],
+			"binary_file_patterns": ["*.bin"]
+		},
 	]
 }

src/main.odin

@@ -45,6 +45,11 @@ Selection :: struct {
 	end:    Position,
 }
 
+Range :: struct {
+	start: int,
+	end:   int,
+}
+
 window_width := 800
 window_height := 600
 font_size: f32 = 20.0
@@ -81,13 +86,22 @@ main :: proc() {
 		for c := r.GetCharPressed(); c != rune(0); c = r.GetCharPressed() {
 			chars, _ := utf8.encode_rune(c)
 			char := chars[0]
+			// TODO: selection
+			if selection.active {
+
+			} else {
 				inject_at(&lines[cursor.line], cursor.char, char)
 				cursor.char += 1
 			}
+		}
 
 		move_cursor()
 
 		if repeatable_key_pressed(.ENTER) {
+			// TODO: selection
+			if selection.active {
+
+			} else {
 				new_line_cap := len(current_line()) - cursor.char
 				bs := make([dynamic]u8, 0, len(current_line()) == 0 ? 1 : new_line_cap * 2)
 				if cursor.char < len(current_line()) {
@@ -100,6 +114,7 @@ main :: proc() {
 				cursor.line += 1
 				cursor.char = 0
 			}
+		}
 
 		if r.IsKeyDown(.LEFT_SUPER) && r.IsKeyPressed(.S) {
 			builder := strings.builder_make()
@@ -114,6 +129,34 @@ main :: proc() {
 
 		skip_backspace: if repeatable_key_pressed(.BACKSPACE) {
 			if cursor.line == 0 && cursor.char == 0 do break skip_backspace
+			// TODO: selection
+			if selection.active {
+				earliest := selection_earliest()
+				latest := selection_latest()
+				earliest_line := &lines[earliest.line]
+				earliest_selection := get_selection_for_line(earliest_line[:], earliest.line)
+				remove_range(earliest_line, earliest_selection.start, earliest_selection.end)
+				if latest.line != earliest.line {
+					latest_line := &lines[latest.line]
+					latest_selection := get_selection_for_line(latest_line[:], latest.line)
+					append(earliest_line, string(latest_line[latest_selection.end:len(latest_line)]))
+					defer delete(latest_line^)
+					ordered_remove(&lines, latest.line)
+					cursor.line -= 1
+					for i := earliest.line + 1; i < latest.line; i += 1 {
+						line_to_remove := lines[i]
+						defer delete(line_to_remove)
+						ordered_remove(&lines, i)
+						// NOTE(grant): Should we do this here?
+						if i < cursor.line {
+							cursor.line -= 1
+						}
+					}
+				} else {
+					cursor.char -= earliest_selection.end - earliest_selection.start
+				}
+				selection.active = false
+			} else {
 				if cursor.char == 0 {
 					// join lines
 					old_len := len(lines[cursor.line - 1])
@@ -141,6 +184,7 @@ main :: proc() {
 					}
 				}
 			}
+		}
 
 		cursor_padding := 3
 		// move viewport up
@@ -257,24 +301,10 @@ render_line_with_selection :: proc(line: []u8, line_index: int, font: r.Font) {
 	earliest := selection_earliest()
 	latest := selection_latest()
 
-	selection_begin: int
-	selection_end: int
-	if line_index == earliest.line && line_index == latest.line {
-		selection_begin = min(selection.start.char, selection.end.char)
-		selection_end = max(selection.start.char, selection.end.char)
-	} else if line_index == earliest.line {
-		selection_begin = earliest.char
-		selection_end = len(line)
-	} else if line_index == latest.line {
-		selection_begin = 0
-		selection_end = latest.char
-	} else if earliest.line < line_index && line_index < latest.line {
-		selection_begin = 0
-		selection_end = len(line)
-	}
+	selection_range := get_selection_for_line(line, line_index)
 
-	prefix := line[:selection_begin]
-	suffix := line[selection_end:] if selection_end < len(line) else []u8{}
+	prefix := line[:selection_range.start]
+	suffix := line[selection_range.end:] if selection_range.end < len(line) else []u8{}
 	// need to copy these into separate buffers for zero value
 	x: f32 = 0.0
 	if len(prefix) != 0 {
@@ -286,10 +316,10 @@ render_line_with_selection :: proc(line: []u8, line_index: int, font: r.Font) {
 	}
 
 	selected_str: string
-	if selection_end < len(line) {
-		selected_str = string(line[selection_begin:selection_end])
+	if selection_range.end < len(line) {
+		selected_str = string(line[selection_range.start:selection_range.end])
 	} else {
-		selected_str = string(line[selection_begin:])
+		selected_str = string(line[selection_range.start:])
 	}
 	cstr :=
 		strings.clone_to_cstring(selected_str, context.temp_allocator) if len(suffix) != 0 else strings.unsafe_string_to_cstring(selected_str)
@@ -436,3 +466,24 @@ selection_latest :: proc() -> Position {
 
 	return latest
 }
+
+get_selection_for_line :: proc(line: []u8, line_index: int) -> Range {
+	earliest := selection_earliest()
+	latest := selection_latest()
+	selection_begin: int
+	selection_end: int
+	if line_index == earliest.line && line_index == latest.line {
+		selection_begin = min(selection.start.char, selection.end.char)
+		selection_end = max(selection.start.char, selection.end.char)
+	} else if line_index == earliest.line {
+		selection_begin = earliest.char
+		selection_end = len(line)
+	} else if line_index == latest.line {
+		selection_begin = 0
+		selection_end = latest.char
+	} else if earliest.line < line_index && line_index < latest.line {
+		selection_begin = 0
+		selection_end = len(line)
+	}
+	return Range{start = selection_begin, end = selection_end}
+}