From 038d9ff144d5d2cc6e65368b7e7f6ec6fa8002df Mon Sep 17 00:00:00 2001
From: Kyler Clay <kylerclay@proton.me>
Date: Wed, 28 May 2025 03:21:51 -0400
Subject: [PATCH] early implementation of inserting verbatim with ctrl+v

---
 src/prompt/readline/linebuf.rs | 20 +++++++++-
 src/prompt/readline/mod.rs     | 67 ++++++++++++++++++++++++++++++++++
 src/prompt/readline/mode.rs    |  7 ----
 3 files changed, 86 insertions(+), 8 deletions(-)

diff --git a/src/prompt/readline/linebuf.rs b/src/prompt/readline/linebuf.rs
index a371c93..e3cda72 100644
--- a/src/prompt/readline/linebuf.rs
+++ b/src/prompt/readline/linebuf.rs
@@ -1144,7 +1144,12 @@ impl LineBuf {
 				self.insert(ch);
 				self.apply_motion(motion);
 			}
-			Verb::Insert(_) => todo!(),
+			Verb::Insert(str) => {
+				for ch in str.chars() {
+					self.insert(ch);
+					self.cursor_fwd(1);
+				}
+			}
 			Verb::Breakline(anchor) => todo!(),
 			Verb::Indent => todo!(),
 			Verb::Dedent => todo!(),
@@ -1203,14 +1208,23 @@ impl LineBuf {
 				match n.cmp(&0) {
 					Ordering::Equal => {
 						let (start,_) = self.this_line();
+						if start == 0 {
+							return
+						}
 						self.cursor = start;
 					}
 					Ordering::Less => {
 						let (start,_) = self.select_lines_up(n.unsigned_abs());
+						if start == 0 {
+							return
+						}
 						self.cursor = start;
 					}
 					Ordering::Greater => {
 						let (_,end) = self.select_lines_down(n.unsigned_abs());
+						if end == self.byte_len() {
+							return
+						}
 						self.cursor = end.saturating_sub(1);
 						let (start,_) = self.this_line();
 						self.cursor = start;
@@ -1264,6 +1278,10 @@ impl LineBuf {
 				edit.stop_merge();
 			}
 		}
+		if clear_redos {
+			flog!(DEBUG, "clearing redos");
+			flog!(DEBUG,cmd);
+		}
 
 		let ViCmd { register, verb, motion, .. } = cmd;
 
diff --git a/src/prompt/readline/mod.rs b/src/prompt/readline/mod.rs
index 7c6b278..afd53ee 100644
--- a/src/prompt/readline/mod.rs
+++ b/src/prompt/readline/mod.rs
@@ -1,5 +1,6 @@
 use std::time::Duration;
 
+use keys::{KeyCode, KeyEvent, ModKeys};
 use linebuf::{strip_ansi_codes_and_escapes, LineBuf};
 use mode::{CmdReplay, ViInsert, ViMode, ViNormal, ViReplace};
 use term::Terminal;
@@ -55,6 +56,10 @@ impl Readline for FernVi {
 		loop {
 
 			let key = self.term.read_key();
+			if let KeyEvent(KeyCode::Char('V'), ModKeys::CTRL) = key {
+				self.handle_verbatim();
+				continue
+			}
 			let Some(cmd) = self.mode.handle_key(key) else {
 				continue
 			};
@@ -84,6 +89,68 @@ impl FernVi {
 			last_movement: None,
 		}
 	}
+	pub fn handle_verbatim(&mut self) -> ShResult<()> {
+		let mut buf = [0u8; 8];
+		let mut collected = Vec::new();
+
+		loop {
+			let n = self.term.read_byte(&mut buf[..1]);
+			if n == 0 {
+				continue;
+			}
+			collected.push(buf[0]);
+
+			// If it starts with ESC, treat as escape sequence
+			if collected[0] == 0x1b {
+				loop {
+					let n = self.term.peek_byte(&mut buf[..1]);
+					if n == 0 {
+						break
+					}
+					collected.push(buf[0]);
+					// Ends a CSI sequence
+					if (0x40..=0x7e).contains(&buf[0]) {
+						break;
+					}
+				}
+				let Ok(seq) = std::str::from_utf8(&collected) else {
+					return Ok(())
+				};
+				let cmd = ViCmd {
+					register: Default::default(),
+					verb: Some(VerbCmd(1, Verb::Insert(seq.to_string()))),
+					motion: None,
+					raw_seq: seq.to_string(),
+				};
+				self.line.exec_cmd(cmd)?;
+			}
+
+			// Optional: handle other edge cases, e.g., raw control codes
+			if collected[0] < 0x20 || collected[0] == 0x7F {
+				let ctrl_seq = std::str::from_utf8(&collected).unwrap();
+				let cmd = ViCmd {
+					register: Default::default(),
+					verb: Some(VerbCmd(1, Verb::Insert(ctrl_seq.to_string()))),
+					motion: None,
+					raw_seq: ctrl_seq.to_string(),
+				};
+				self.line.exec_cmd(cmd)?;
+				break;
+			}
+
+			// Try to parse as UTF-8 if it's a valid Unicode sequence
+			if let Ok(s) = std::str::from_utf8(&collected) {
+				if s.chars().count() == 1 {
+					let ch = s.chars().next().unwrap();
+					// You got a literal Unicode char
+					eprintln!("Got char: {:?}", ch);
+					break;
+				}
+			}
+
+		}
+		Ok(())
+	}
 	pub fn print_buf(&mut self, refresh: bool) -> ShResult<()> {
 		let (height,width) = self.term.get_dimensions()?;
 		if refresh {
diff --git a/src/prompt/readline/mode.rs b/src/prompt/readline/mode.rs
index 0f9bd2e..f7f9ff7 100644
--- a/src/prompt/readline/mode.rs
+++ b/src/prompt/readline/mode.rs
@@ -302,7 +302,6 @@ impl ViNormal {
 	}
 	pub fn try_parse(&mut self, ch: char) -> Option<ViCmd> {
 		self.pending_seq.push(ch);
-		flog!(DEBUG, self.pending_seq);
 		let mut chars = self.pending_seq.chars().peekable();
 
 		let register = 'reg_parse: {
@@ -333,7 +332,6 @@ impl ViNormal {
 			let Some(ch) = chars_clone.next() else {
 				break 'verb_parse None
 			};
-			flog!(DEBUG, "parsing verb char '{}'",ch);
 			match ch {
 				'.' => {
 					return Some(
@@ -519,7 +517,6 @@ impl ViNormal {
 			let Some(ch) = chars_clone.next() else {
 				break 'motion_parse None
 			};
-			flog!(DEBUG, "parsing motion char '{}'",ch);
 			match (ch, &verb) {
 				('d', Some(VerbCmd(_,Verb::Delete))) |
 				('c', Some(VerbCmd(_,Verb::Change))) |
@@ -692,15 +689,12 @@ impl ViNormal {
 						raw_seq: std::mem::take(&mut self.pending_seq)
 					}
 				);
-				flog!(DEBUG, cmd);
 				cmd
 			}
 			CmdState::Pending => {
-				flog!(DEBUG, "pending sequence: {}", self.pending_seq);
 				None
 			}
 			CmdState::Invalid => {
-				flog!(DEBUG, "invalid sequence: {}",self.pending_seq);
 				self.pending_seq.clear();
 				None
 			}
@@ -710,7 +704,6 @@ impl ViNormal {
 
 impl ViMode for ViNormal {
 	fn handle_key(&mut self, key: E) -> Option<ViCmd> {
-		flog!(DEBUG, key);
 		match key {
 			E(K::Char(ch), M::NONE) => self.try_parse(ch),
 			E(K::Backspace, M::NONE) => {