wez/wezterm
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Add some state to track vertical scroll regions

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However, it doesn't really do very much that is useful yet
This commit is contained in:
Wez Furlong 2018-01-28 21:14:06 -08:00
parent 6ed0e81f02
commit 2e73b937bb
1 changed files with 20 additions and 5 deletions
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25
src/term/mod.rs
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@ -306,7 +306,7 @@ impl Screen {
}
}
fn scroll_up(&mut self, num_rows: usize) {
fn scroll_up(&mut self, scroll_top: usize, scroll_bottom: usize, num_rows: usize) {
let max_allowed = self.physical_rows + self.scrollback_size;
if self.lines.len() + num_rows >= max_allowed {
let lines_to_pop = (self.lines.len() + num_rows) - max_allowed;
@ -343,6 +343,10 @@ pub struct TerminalState {
/// and this is used as the result of the advance_bytes()
/// method.
answerback: Option<Vec<u8>>,
/// The scroll region
scroll_top: usize,
scroll_bottom: usize,
}
impl TerminalState {
@ -363,6 +367,8 @@ impl TerminalState {
cursor_y: 0,
state_changed: true,
answerback: None,
scroll_top: 0,
scroll_bottom: physical_rows-1,
}
}
@ -469,7 +475,9 @@ impl TerminalState {
}
fn scroll_up(&mut self, num_rows: usize) {
self.screen_mut().scroll_up(num_rows)
let top = self.scroll_top;
let bottom = self.scroll_bottom;
self.screen_mut().scroll_up(top, bottom, num_rows)
}
fn new_line(&mut self, move_to_first_column: bool) {
@ -479,8 +487,7 @@ impl TerminalState {
self.cursor_x
};
let y = self.cursor_y;
let num_rows = self.screen().physical_rows;
let y = if y + 1 == num_rows {
let y = if y == self.scroll_bottom {
self.scroll_up(1);
y
} else {
@ -574,6 +581,7 @@ impl vte::Perform for TerminalState {
fn osc_dispatch(&mut self, _: &[&[u8]]) {}
fn csi_dispatch(&mut self, params: &[i64], intermediates: &[u8], ignore: bool, byte: char) {
for act in CSIParser::new(params, intermediates, ignore, byte) {
debug!("{:?}", act);
match act {
CSIAction::SetPen(pen) => {
self.pen = pen;
@ -663,7 +671,14 @@ impl vte::Perform for TerminalState {
self.push_answerback(format!("\x1b[{};{}R", row, col).as_bytes());
}
CSIAction::SetScrollingRegion { top, bottom } => {
println!("unhandled: SetScrollingRegion {}-{}", top, bottom);
// TODO: this isn't respected fully yet
let rows = self.screen().physical_rows;
self.scroll_top = top.min(rows-1);
self.scroll_bottom = bottom.min(rows-1);
if self.scroll_top > self.scroll_bottom {
std::mem::swap(&mut self.scroll_top, &mut self.scroll_bottom);
}
println!("SetScrollingRegion {} - {}", self.scroll_top, self.scroll_bottom);
}
CSIAction::RequestDeviceAttributes => {
self.push_answerback(DEVICE_IDENT);