use std::time::Instant;
use crossterm::event::{MouseButton, MouseEventKind};
use ratatui::{backend::Backend, layout::Rect, Terminal};
use super::{
copy_interaction::{code_block_copy_target_at, selection_position, selection_position_clamped},
expandable_tool_entry, is_tool_entry,
render::tool_entry_lines,
text_selection::{CopyNotice, TextSelection},
tool_display_line_count, App,
};
impl App {
pub(super) fn handle_mouse_event<B: Backend>(
&mut self,
kind: MouseEventKind,
column: u16,
row: u16,
terminal: &mut Terminal<B>,
) -> Result<(), B::Error> {
let size = terminal.size()?;
let width = size.width as usize;
let height = size.height as usize;
let now = Instant::now();
match kind {
MouseEventKind::ScrollUp => {
self.hovered_code_block_copy = None;
self.reveal_history_scrollbar(now);
self.history_scrollbar_drag = None;
self.scroll_history_lines(width, height, now, -3);
}
MouseEventKind::ScrollDown => {
self.hovered_code_block_copy = None;
self.reveal_history_scrollbar(now);
self.history_scrollbar_drag = None;
self.scroll_history_lines(width, height, now, 3);
}
MouseEventKind::Down(MouseButton::Left) => {
let layout = self.screen_layout(Rect::new(0, 0, size.width, size.height), now);
let history_start =
self.visible_history_start(layout.history_len, layout.history.height as usize);
let targets = self.code_block_copy_targets(width);
let code_target =
code_block_copy_target_at(&targets, layout.history, history_start, column, row);
let scrollbar = layout
.history_scrollbar
.filter(|scrollbar| scrollbar.contains(column, row))
.filter(|_| self.should_render_history_scrollbar(now));
self.update_history_scrollbar_hover(layout.history_scrollbar, column, row);
self.hovered_code_block_copy = code_target.as_ref().map(|target| target.line);
if let Some(scrollbar) = scrollbar {
self.text_selection = None;
self.reveal_history_scrollbar(now);
let drag = scrollbar.begin_drag(row);
self.history_scrollbar_drag = Some(drag);
self.history_scroll = scrollbar.scroll_state_for_pointer(row, drag);
} else if layout.jump_to_bottom.is_some_and(|rect| {
rect.contains(ratatui::layout::Position { x: column, y: row })
}) {
self.text_selection = None;
self.history_scrollbar_drag = None;
self.scroll_history_to_bottom();
} else if let Some(target) = code_target {
self.text_selection = None;
self.copy_text(&target.text, now);
} else if let Some(position) =
selection_position(layout.history, history_start, column, row)
{
self.history_scrollbar_drag = None;
self.text_selection = Some(TextSelection::new(position));
} else {
self.text_selection = None;
}
}
MouseEventKind::Drag(MouseButton::Left) => {
let layout = self.screen_layout(Rect::new(0, 0, size.width, size.height), now);
self.update_history_scrollbar_hover(layout.history_scrollbar, column, row);
if let Some(drag) = self.history_scrollbar_drag {
self.text_selection = None;
self.hovered_code_block_copy = None;
if let Some(scrollbar) = layout.history_scrollbar {
self.history_scroll = scrollbar.scroll_state_for_pointer(row, drag);
}
} else {
let history_start = self
.visible_history_start(layout.history_len, layout.history.height as usize);
let targets = self.code_block_copy_targets(width);
self.hovered_code_block_copy = code_block_copy_target_at(
&targets,
layout.history,
history_start,
column,
row,
)
.map(|target| target.line);
if let (Some(selection), Some(position)) = (
&mut self.text_selection,
selection_position_clamped(layout.history, history_start, column, row),
) {
selection.update(position);
}
}
}
MouseEventKind::Up(MouseButton::Left) => {
let was_scrollbar_drag = self.history_scrollbar_drag.take().is_some();
let layout = self.screen_layout(Rect::new(0, 0, size.width, size.height), now);
self.update_history_scrollbar_hover(layout.history_scrollbar, column, row);
let history_start =
self.visible_history_start(layout.history_len, layout.history.height as usize);
let targets = self.code_block_copy_targets(width);
self.hovered_code_block_copy =
code_block_copy_target_at(&targets, layout.history, history_start, column, row)
.map(|target| target.line);
if was_scrollbar_drag {
self.text_selection = None;
} else if let Some(mut selection) = self.text_selection.take() {
let release_position =
selection_position_clamped(layout.history, history_start, column, row);
if let Some(position) = release_position {
selection.update(position);
}
if selection.has_moved() {
let selected_lines = selection.selected_line_range();
let lines = self.visible_history_lines(
width,
now,
selected_lines.start,
selected_lines.len(),
);
if let Some(text) = selection.selected_text(&lines, selected_lines.start) {
self.copy_text(&text, now);
self.text_selection = Some(selection);
}
} else if release_position.is_some() {
let line = history_start
.saturating_add(row.saturating_sub(layout.history.y) as usize);
self.toggle_tool_output_at_history_line(line, width, terminal)?;
}
}
}
MouseEventKind::Moved if self.last_mouse_position == Some((column, row)) => {}
MouseEventKind::Moved => {
self.last_mouse_position = Some((column, row));
let layout = self.screen_layout(Rect::new(0, 0, size.width, size.height), now);
self.update_history_scrollbar_hover(layout.history_scrollbar, column, row);
let history_start =
self.visible_history_start(layout.history_len, layout.history.height as usize);
self.hovered_code_block_copy = if layout
.history
.contains(ratatui::layout::Position { x: column, y: row })
{
let targets = self.code_block_copy_targets(width);
code_block_copy_target_at(&targets, layout.history, history_start, column, row)
.map(|target| target.line)
} else {
None
};
}
MouseEventKind::Down(MouseButton::Right)
| MouseEventKind::Down(MouseButton::Middle)
| MouseEventKind::Up(MouseButton::Right)
| MouseEventKind::Up(MouseButton::Middle)
| MouseEventKind::Drag(MouseButton::Right)
| MouseEventKind::Drag(MouseButton::Middle)
| MouseEventKind::ScrollLeft
| MouseEventKind::ScrollRight => {}
}
Ok(())
}
fn toggle_tool_output_at_history_line<B: Backend>(
&mut self,
line: usize,
width: usize,
terminal: &mut Terminal<B>,
) -> Result<bool, B::Error> {
let header_len = self.session_header_lines(width).len();
if let Some(transcript_line) = line.checked_sub(header_len) {
let index = self.history_lines.entry_index_at_line(
&self.transcript,
width,
self.info.max_tool_output_lines,
transcript_line,
);
if let Some(index) = index.filter(|&index| {
self.transcript.get(index).is_some_and(|entry| {
expandable_tool_entry(entry, self.info.max_tool_output_lines)
})
}) {
self.toggle_transcript_tool_output(index);
self.clamp_history_scroll_for_terminal(terminal)?;
return Ok(true);
}
}
let static_len = self.history_static_len(width);
let mut pending_start = static_len;
let transcript_ends_with_tool =
self.last_inserted_was_tool || self.transcript.last().is_some_and(is_tool_entry);
for (shell_index, shell) in self.running_inline_shell_entries().enumerate() {
if shell_index > 0 || transcript_ends_with_tool {
pending_start = pending_start.saturating_add(1);
}
pending_start = pending_start.saturating_add(
tool_entry_lines(&shell, width, self.info.max_tool_output_lines).len(),
);
}
if let Some(pending) = self.pending_tool_call.as_ref() {
if transcript_ends_with_tool {
pending_start = pending_start.saturating_add(1);
}
let pending_end = pending_start.saturating_add(
tool_entry_lines(pending, width, self.info.max_tool_output_lines).len(),
);
if (pending_start..pending_end).contains(&line)
&& tool_display_line_count(&pending.display_lines) > self.info.max_tool_output_lines
{
let pending = self
.pending_tool_call
.as_mut()
.expect("pending tool exists");
pending.expanded = !pending.expanded;
self.status = if pending.expanded {
"tool output expanded".into()
} else {
"tool output collapsed".into()
};
self.clamp_history_scroll_for_terminal(terminal)?;
return Ok(true);
}
}
Ok(false)
}
fn copy_text(&mut self, text: &str, now: Instant) {
self.copy_notice = Some(match self.clipboard.copy(text) {
Ok(()) => CopyNotice::copied(text.chars().count(), now),
Err(error) => CopyNotice::failed(&error, now),
});
}
}