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even more performance improvements

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This commit is contained in:
Aram Drevekenin 2020-07-25 19:10:30 +02:00
parent 4d871294d9
commit 0d57a74247
1 changed files with 25 additions and 80 deletions
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105
src/main.rs
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@ -184,14 +184,13 @@ impl Display for TerminalCharacter {
}
struct TerminalOutput {
pub characters: Vec<char>, // we use a vec rather than a string here because one char can take up multiple characters in a string
pub characters: Vec<TerminalCharacter>,
pub display_rows: u16,
pub display_cols: u16,
pub should_render: bool,
cursor_position: usize,
newline_indices: Vec<usize>, // canonical line breaks we get from the vt interpreter
linebreak_indices: Vec<usize>, // linebreaks from line wrapping
unhandled_ansi_codes: HashMap<usize, String>,
pending_ansi_code: Option<String>, // this is used eg. in a carriage return, where we need to preserve the style
}
@ -205,7 +204,6 @@ impl TerminalOutput {
display_rows: 0,
display_cols: 0,
should_render: false,
unhandled_ansi_codes: HashMap::new(),
pending_ansi_code: None,
}
}
@ -253,12 +251,8 @@ impl TerminalOutput {
let linebreak_indices: HashSet<&usize> = HashSet::from_iter(self.linebreak_indices.iter());
loop {
i -= 1;
let character = self.characters.get(i).unwrap();
let mut terminal_character = TerminalCharacter::new(*character);
if let Some(code) = self.unhandled_ansi_codes.get(&i) {
terminal_character.ansi_code = Some(code.clone());
}
current_line.push_front(terminal_character);
let terminal_character = self.characters.get(i).unwrap();
current_line.push_front(terminal_character.clone());
if newline_indices.contains(&i) || linebreak_indices.contains(&i) {
// pad line
for _ in current_line.len()..self.display_cols as usize {
@ -365,6 +359,7 @@ impl TerminalOutput {
self.newline_indices.push(self.characters.len()); // -1?
self.cursor_position = self.characters.len(); // -1?
self.should_render = true;
self.pending_ansi_code = None;
}
fn move_to_beginning_of_line (&mut self) {
let last_newline_index = if self.newline_indices.is_empty() {
@ -384,19 +379,20 @@ impl vte::Perform for TerminalOutput {
if DEBUGGING {
println!("\r[print] {:?}", c);
} else {
let mut terminal_character = TerminalCharacter::new(c);
terminal_character.ansi_code = self.pending_ansi_code.clone();
if self.characters.len() == self.cursor_position {
self.characters.push(c);
self.characters.push(terminal_character);
} else if self.characters.len() > self.cursor_position {
self.characters.splice(self.cursor_position..=self.cursor_position, [c].iter().copied()); // TODO: better
self.characters.remove(self.cursor_position);
self.characters.insert(self.cursor_position, terminal_character);
} else {
let mut space_character = TerminalCharacter::new(' ');
space_character.ansi_code = self.pending_ansi_code.clone();
for _ in self.characters.len()..self.cursor_position {
self.characters.push(' ');
self.characters.push(space_character.clone());
};
self.characters.push(c);
}
if let Some(ansi_code) = &self.pending_ansi_code {
self.unhandled_ansi_codes.insert(self.cursor_position, ansi_code.clone());
self.pending_ansi_code = None;
self.characters.push(terminal_character);
}
let start_of_last_line = self.index_of_beginning_of_line(self.cursor_position);
@ -424,8 +420,7 @@ impl vte::Perform for TerminalOutput {
self.move_to_beginning_of_line();
} else if byte == 08 { // backspace
self.cursor_position -= 1;
self.unhandled_ansi_codes.remove(&self.cursor_position);
// TODO: also remove character
self.characters.remove(self.cursor_position);
} else if byte == 10 { // 0a, newline
self.add_newline();
}
@ -471,20 +466,15 @@ impl vte::Perform for TerminalOutput {
if params.len() == 1 && params[0] == 0 {
// eg. \u{1b}[m
self.pending_ansi_code = Some(String::from("\u{1b}[m"));
self.unhandled_ansi_codes.insert(self.cursor_position, String::from("\u{1b}[m"));
} else {
// eg. \u{1b}[38;5;0m
let param_string = params.iter().map(|p| p.to_string()).collect::<Vec<String>>().join(";");
self.pending_ansi_code = Some(format!("\u{1b}[{}m", param_string));
self.unhandled_ansi_codes.insert(self.cursor_position, format!("\u{1b}[{}m", param_string));
}
} else if c == 'C' { // move cursor
self.cursor_position += params[0] as usize; // TODO: negative value?
} else if c == 'K' { // clear line (0 => right, 1 => left, 2 => all)
if params[0] == 0 {
for i in self.cursor_position + 1..self.characters.len() {
self.unhandled_ansi_codes.remove(&i);
}
if let Some(position_of_first_newline_index_to_delete) = self.newline_indices.iter().position(|&ni| ni > self.cursor_position) {
self.newline_indices.truncate(position_of_first_newline_index_to_delete);
}
@ -496,9 +486,6 @@ impl vte::Perform for TerminalOutput {
// TODO: implement 1 and 2
} else if c == 'J' { // clear all (0 => below, 1 => above, 2 => all, 3 => saved)
if params[0] == 0 {
for i in self.cursor_position + 1..self.characters.len() {
self.unhandled_ansi_codes.remove(&i);
}
if let Some(position_of_first_newline_index_to_delete) = self.newline_indices.iter().position(|&ni| ni > self.cursor_position) {
self.newline_indices.truncate(position_of_first_newline_index_to_delete);
}
@ -557,32 +544,6 @@ fn split_horizontally_with_gap (rect: &Winsize) -> (Winsize, Winsize) {
(first_rect, second_rect)
}
fn get_previous_style (frame: &Vec<TerminalCharacter>, current_index: usize, current_column: usize) -> Option<&str> {
if current_index == 0 || current_column == 0 {
// if true {
return None
};
let mut character_count = current_column; // only check back until line break, styles before that are not relevant
let mut prev_index = current_index;
loop {
character_count -= 1;
prev_index -= 1;
match frame.get(prev_index) {
Some(previous_character) => {
if let Some(previous_ansi_code) = &previous_character.ansi_code {
return Some(previous_ansi_code)
}
},
None => {
return None;
}
};
if prev_index == 0 || character_count == 0 {
return None;
}
}
}
fn character_is_already_onscreen(
last_frame: &Vec<TerminalCharacter>,
current_frame: &Vec<TerminalCharacter>,
@ -593,13 +554,11 @@ fn character_is_already_onscreen(
let current_character = current_frame.get(index).unwrap();
let last_character_style = match &last_character.ansi_code {
Some(ansi_code) => Some(ansi_code.as_str()),
// None => None,
None => get_previous_style(&last_frame, index, *character_column),
None => None,
};
let current_character_style = match &current_character.ansi_code {
Some(ansi_code) => Some(ansi_code.as_str()),
// None => None,
None => get_previous_style(&current_frame, index, *character_column),
None => None,
};
last_character_style == current_character_style && last_character.character == current_character.character
}
@ -650,28 +609,12 @@ impl Screen {
let row = i / full_screen_ws.ws_col as usize + 1;
let col = i % full_screen_ws.ws_col as usize + 1;
if !character_is_already_onscreen(&last_frame, &frame, i, &col) {
// if true {
if !last_character_was_changed {
// goto row/col
data_lines.push_str(&format!("\u{1b}[{};{}H", row, &col));
// copy the last style from the last frame, or reset the style
// this is so that if the first character of the changed string
// has no style, it will get the appropriate one and not the one
// from where the cursor happened to be previously
if i > 0 {
match get_previous_style(&frame, i, col) {
Some(previous_ansi_code) => {
data_lines.push_str("\u{1b}[m"); // reset style
data_lines.push_str(&previous_ansi_code);
},
None => {
data_lines.push_str("\u{1b}[m"); // reset style
}
};
} else {
data_lines.push_str("\u{1b}[m"); // reset style
}
data_lines.push_str(&format!("\u{1b}[{};{}H", row, &col)); // goto row/col
data_lines.push_str("\u{1b}[m"); // reset style
}
// TODO: only render the ansi_code if it is different from the previous
// rendered ansi code (previous char in this loop)
data_lines.push_str(&current_character.to_string());
last_character_was_changed = true;
} else {
@ -762,12 +705,14 @@ fn main() {
}
(Some(first_terminal_read_bytes), None) => {
let mut terminal1_output = terminal1_output.lock().unwrap();
let now = Instant::now();
for byte in first_terminal_read_bytes.iter() {
vte_parser_terminal1.advance(&mut *terminal1_output, *byte);
}
// println!("\rParsed in {:?}", now.elapsed());
}
(None, Some(second_terminal_read_bytes)) => {
let mut terminal1_output = terminal1_output.lock().unwrap();
// let mut terminal1_output = terminal1_output.lock().unwrap();
let mut terminal2_output = terminal2_output.lock().unwrap();
for byte in second_terminal_read_bytes.iter() {
vte_parser_terminal2.advance(&mut *terminal2_output, *byte);
@ -782,9 +727,9 @@ fn main() {
if terminal1_output.should_render || terminal2_output.should_render {
let active_terminal = active_terminal.lock().unwrap();
let mut screen = screen.lock().unwrap();
// let now = Instant::now();
let now = Instant::now();
screen.render(&mut *terminal1_output, &mut *terminal2_output, &full_screen_ws, *active_terminal == first_terminal_pid);
// println!("\r->R rendered in {:?}", now.elapsed());
// println!("\r-------->R rendered in {:?}", now.elapsed());
}
}
}