From fe6f32c7698710eaacff825c20925dba6284408e Mon Sep 17 00:00:00 2001
From: Alessandro Mauri <alemauri001@gmail.com>
Date: Mon, 20 Oct 2025 16:15:57 +0200
Subject: [PATCH] move around with ctrl

---
 lib/ugui.c3l/src/textedit.c3     | 79 ++++++++++++++++++++++++++++++--
 lib/ugui.c3l/src/widgets/text.c3 |  3 +-
 2 files changed, 76 insertions(+), 6 deletions(-)

diff --git a/lib/ugui.c3l/src/textedit.c3 b/lib/ugui.c3l/src/textedit.c3
index 77a707a..00937b1 100644
--- a/lib/ugui.c3l/src/textedit.c3
+++ b/lib/ugui.c3l/src/textedit.c3
@@ -25,24 +25,39 @@ fn bool Ctx.text_edit(&ctx, TextEdit* te)
 
 	// handle backspace and delete
 	if (mod.bkspc) {
-		te.remove_character(false);
+		if (mod & KMOD_CTRL) {
+			te.remove_word(false);
+		} else {
+			te.remove_character(false);
+		}
 	}
 	if (mod.del) {
-		te.remove_character(true);
+		if (mod & KMOD_CTRL) {
+			te.remove_word(true);
+		} else {
+			te.remove_character(true);
+		}
 	}
 
 	// handle arrow keys
 	if (mod.left) {
-		te.move_cursor(false, !!(mod & KMOD_SHIFT));
+		if (mod & KMOD_CTRL) {
+			te.move_cursor_word(false, !!(mod & KMOD_SHIFT));
+		} else {
+			te.move_cursor(false, !!(mod & KMOD_SHIFT));
+		}
 	}
 	if (mod.right) {
-		te.move_cursor(true, !!(mod & KMOD_SHIFT));
+		if (mod & KMOD_CTRL) {
+			te.move_cursor_word(true, !!(mod & KMOD_SHIFT));
+		} else {
+			te.move_cursor(true, !!(mod & KMOD_SHIFT));
+		}
 	}
 
 	// TODO: up, down
 	// TODO: mod.home
 	// TODO: mod.end
-	// TODO: selection with shift+arrows
 
 	return te.chars < te.buffer.len;
 }
@@ -50,6 +65,7 @@ fn bool Ctx.text_edit(&ctx, TextEdit* te)
 module ugui::textedit::te;
 
 import std::core::string;
+import std::ascii;
 
 // returns the offset of the next codepoint in the buffer from the cursor
 fn usz TextEdit.next_char_off(&te)
@@ -118,6 +134,32 @@ fn void TextEdit.set_cursor(&te, usz cur, bool select)
 	}
 }
 
+fn void TextEdit.move_cursor_word(&te, bool forward, bool select)
+{
+	// moving out of selection, snap to the end
+	if (!select && te.sel_len != 0) {
+		te.move_cursor(forward, select);
+		return;
+	}
+
+	usz prev_cur = te.cursor;
+	while (te.cursor <= te.chars) {
+		char c;
+		if (forward) {
+			if (te.cursor == te.chars) break;
+			c = te.buffer[te.cursor];
+		} else {
+			if (te.cursor == 0) break;
+			c = te.buffer[te.cursor-1];
+		}
+		if (ascii::is_space(c) || ascii::is_punct(c)) break;
+		te.move_cursor(forward, select);
+	}
+
+	// move at least one character
+	if (prev_cur == te.cursor) te.move_cursor(forward, select);
+}
+
 fn void TextEdit.delete_selection(&te)
 {
 	if (te.sel_len == 0) return;
@@ -159,6 +201,33 @@ fn void TextEdit.remove_character(&te, bool forward)
 	}
 }
 
+// remove the word before or after the cursor up until the next punctuation or space
+fn void TextEdit.remove_word(&te, bool forward)
+{
+	// if there is a selection active then delete that selection
+	if (te.sel_len) {
+		te.delete_selection();
+		return;
+	}
+
+	usz prev_cur = te.cursor;
+	while (te.chars > 0) {
+		char c;
+		if (forward) {
+			if (te.cursor == te.chars) break;
+			c = te.buffer[te.cursor];
+		} else {
+			if (te.cursor == 0) break;
+			c = te.buffer[te.cursor-1];
+		}
+		if (ascii::is_space(c) || ascii::is_punct(c)) break;
+		te.remove_character(forward);
+	}
+
+	// delete at least one character
+	if (prev_cur == te.cursor) te.remove_character(forward);
+}
+
 // insert a character at the cursor and update the cursor
 fn void TextEdit.insert_character(&te, uint cp)
 {
diff --git a/lib/ugui.c3l/src/widgets/text.c3 b/lib/ugui.c3l/src/widgets/text.c3
index 0fcf278..e0b41c6 100644
--- a/lib/ugui.c3l/src/widgets/text.c3
+++ b/lib/ugui.c3l/src/widgets/text.c3
@@ -86,7 +86,8 @@ fn ElemEvents? Ctx.text_box_id(&ctx, Id id, Size w, Size h, TextEdit* te, Anchor
 	if (elem.events.has_focus) {
 		if (elem.events.mouse_press || elem.events.mouse_hold) {
 			usz cur = ctx.hit_test_string(s, text_bounds, text_alignment, ctx.input.mouse.pos, reflow)!;
-			te.set_cursor(cur, elem.events.mouse_hold & !elem.events.mouse_press);
+			bool select = (elem.events.mouse_hold && !elem.events.mouse_press) || (ctx.get_mod() & KMOD_SHIFT);
+			te.set_cursor(cur, select);
 		}
 		Rect cur = ctx.get_cursor_position(s, text_bounds, text_alignment, te.cursor, reflow)!;
 		cur.w = 2;