use crate::app::cmd::effect::Effect;
use crate::app::model::app_state::AppState;
use crate::app::model::shared::inspector_tab::InspectorTab;
use crate::app::model::shared::viewport::{
calculate_next_column_offset, calculate_prev_column_offset,
};
use crate::app::services::AppServices;
use crate::app::update::action::{Action, ScrollAmount, ScrollDirection, ScrollTarget};
use super::inspector_max_scroll;
pub fn reduce(
state: &mut AppState,
action: &Action,
services: &AppServices,
) -> Option<Vec<Effect>> {
match action {
Action::Scroll {
target: ScrollTarget::Inspector,
direction: ScrollDirection::Up,
amount: ScrollAmount::Line,
} => {
state.ui.inspector_scroll_offset = state.ui.inspector_scroll_offset.saturating_sub(1);
Some(vec![])
}
Action::Scroll {
target: ScrollTarget::Inspector,
direction: ScrollDirection::Down,
amount: ScrollAmount::Line,
} => {
let max_offset = inspector_max_scroll(state, services);
if state.ui.inspector_scroll_offset < max_offset {
state.ui.inspector_scroll_offset += 1;
}
Some(vec![])
}
Action::Scroll {
target: ScrollTarget::Inspector,
direction: ScrollDirection::Up,
amount: ScrollAmount::ToStart,
} => {
state.ui.inspector_scroll_offset = 0;
Some(vec![])
}
Action::Scroll {
target: ScrollTarget::Inspector,
direction: ScrollDirection::Down,
amount: ScrollAmount::ToEnd,
} => {
state.ui.inspector_scroll_offset = inspector_max_scroll(state, services);
Some(vec![])
}
Action::Scroll {
target: ScrollTarget::Inspector,
direction: ScrollDirection::Down,
amount: ScrollAmount::HalfPage,
} => {
let visible = match state.ui.inspector_tab {
InspectorTab::Ddl => state.inspector_ddl_visible_rows(),
_ => state.inspector_visible_rows(),
};
let delta = (visible / 2).max(1);
let max = inspector_max_scroll(state, services);
state.ui.inspector_scroll_offset = (state.ui.inspector_scroll_offset + delta).min(max);
Some(vec![])
}
Action::Scroll {
target: ScrollTarget::Inspector,
direction: ScrollDirection::Up,
amount: ScrollAmount::HalfPage,
} => {
let visible = match state.ui.inspector_tab {
InspectorTab::Ddl => state.inspector_ddl_visible_rows(),
_ => state.inspector_visible_rows(),
};
let delta = (visible / 2).max(1);
state.ui.inspector_scroll_offset =
state.ui.inspector_scroll_offset.saturating_sub(delta);
Some(vec![])
}
Action::Scroll {
target: ScrollTarget::Inspector,
direction: ScrollDirection::Down,
amount: ScrollAmount::FullPage,
} => {
let visible = match state.ui.inspector_tab {
InspectorTab::Ddl => state.inspector_ddl_visible_rows(),
_ => state.inspector_visible_rows(),
};
let delta = visible.max(1);
let max = inspector_max_scroll(state, services);
state.ui.inspector_scroll_offset = (state.ui.inspector_scroll_offset + delta).min(max);
Some(vec![])
}
Action::Scroll {
target: ScrollTarget::Inspector,
direction: ScrollDirection::Up,
amount: ScrollAmount::FullPage,
} => {
let visible = match state.ui.inspector_tab {
InspectorTab::Ddl => state.inspector_ddl_visible_rows(),
_ => state.inspector_visible_rows(),
};
let delta = visible.max(1);
state.ui.inspector_scroll_offset =
state.ui.inspector_scroll_offset.saturating_sub(delta);
Some(vec![])
}
Action::Scroll {
target: ScrollTarget::Inspector,
direction: ScrollDirection::Left,
amount: ScrollAmount::Line,
} => {
state.ui.inspector_horizontal_offset =
calculate_prev_column_offset(state.ui.inspector_horizontal_offset);
Some(vec![])
}
Action::Scroll {
target: ScrollTarget::Inspector,
direction: ScrollDirection::Right,
amount: ScrollAmount::Line,
} => {
let plan = &state.ui.inspector_viewport_plan;
let all_widths_len = plan.max_offset + plan.column_count;
state.ui.inspector_horizontal_offset = calculate_next_column_offset(
all_widths_len,
state.ui.inspector_horizontal_offset,
plan.column_count,
);
Some(vec![])
}
_ => None,
}
}
#[cfg(test)]
mod tests {
use super::*;
use crate::app::update::browse::navigation::reduce_navigation;
use crate::domain::{Column, Table};
use std::time::Instant;
mod inspector_scroll_top_bottom {
use super::*;
fn state_with_table_detail(columns: usize) -> AppState {
let mut state = AppState::new("test".to_string());
state.ui.inspector_pane_height = 10;
state.ui.inspector_tab = InspectorTab::Columns;
let cols: Vec<Column> = (0..columns)
.map(|i| Column {
name: format!("col_{i}"),
data_type: "text".to_string(),
nullable: false,
default: None,
is_primary_key: false,
is_unique: false,
comment: None,
ordinal_position: i as i32,
})
.collect();
state.session.set_table_detail_raw(Some(Table {
schema: "public".to_string(),
name: "test_table".to_string(),
owner: None,
columns: cols,
primary_key: None,
indexes: vec![],
foreign_keys: vec![],
rls: None,
triggers: vec![],
row_count_estimate: Some(0),
comment: None,
}));
state
}
#[test]
fn inspector_scroll_top_resets_to_zero() {
let mut state = state_with_table_detail(20);
state.ui.inspector_scroll_offset = 10;
let effects = reduce_navigation(
&mut state,
&Action::Scroll {
target: ScrollTarget::Inspector,
direction: ScrollDirection::Up,
amount: ScrollAmount::ToStart,
},
&AppServices::stub(),
Instant::now(),
);
assert!(effects.is_some());
assert_eq!(state.ui.inspector_scroll_offset, 0);
}
#[test]
fn inspector_scroll_bottom_goes_to_max() {
let mut state = state_with_table_detail(20);
state.ui.inspector_scroll_offset = 0;
let visible = state.inspector_visible_rows();
let expected_max = 20_usize.saturating_sub(visible);
let effects = reduce_navigation(
&mut state,
&Action::Scroll {
target: ScrollTarget::Inspector,
direction: ScrollDirection::Down,
amount: ScrollAmount::ToEnd,
},
&AppServices::stub(),
Instant::now(),
);
assert!(effects.is_some());
assert_eq!(state.ui.inspector_scroll_offset, expected_max);
}
#[test]
fn inspector_scroll_bottom_no_detail_stays_zero() {
let mut state = AppState::new("test".to_string());
state.ui.inspector_pane_height = 10;
let effects = reduce_navigation(
&mut state,
&Action::Scroll {
target: ScrollTarget::Inspector,
direction: ScrollDirection::Down,
amount: ScrollAmount::ToEnd,
},
&AppServices::stub(),
Instant::now(),
);
assert!(effects.is_some());
assert_eq!(state.ui.inspector_scroll_offset, 0);
}
}
}