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//! Navigation-related reducer helper functions
//!
//! Provides the `apply_scroll` helper for scroll handling.
//! The main reducer in mod.rs handles the actual event dispatch.
use super::super::events::ScrollDirection;
use super::super::state::{Mode, PanelId, StudioState};
/// Apply scroll to the current focused panel
#[allow(clippy::cognitive_complexity)]
pub fn apply_scroll(state: &mut StudioState, direction: ScrollDirection, amount: usize) {
match state.active_mode {
Mode::Explore => match state.focused_panel {
PanelId::Left => {
// File tree navigation
match direction {
ScrollDirection::Up => {
for _ in 0..amount {
state.modes.explore.file_tree.select_prev();
}
}
ScrollDirection::Down => {
for _ in 0..amount {
state.modes.explore.file_tree.select_next();
}
}
ScrollDirection::PageUp => {
state.modes.explore.file_tree.page_up(amount);
}
ScrollDirection::PageDown => {
state.modes.explore.file_tree.page_down(amount);
}
ScrollDirection::Top => {
state.modes.explore.file_tree.select_first();
}
ScrollDirection::Bottom => {
state.modes.explore.file_tree.select_last();
}
}
}
PanelId::Center => {
// Code view scroll
match direction {
ScrollDirection::Up => {
state.modes.explore.code_view.scroll_up(amount);
}
ScrollDirection::Down => {
state.modes.explore.code_view.scroll_down(amount);
}
_ => {}
}
}
PanelId::Right => {
// Context/blame panel scroll - no scroll state yet
}
},
Mode::Commit => match state.focused_panel {
PanelId::Left => {
// File tree navigation
match direction {
ScrollDirection::Up => {
for _ in 0..amount {
state.modes.commit.file_tree.select_prev();
}
}
ScrollDirection::Down => {
for _ in 0..amount {
state.modes.commit.file_tree.select_next();
}
}
ScrollDirection::PageUp => {
state.modes.commit.file_tree.page_up(amount);
}
ScrollDirection::PageDown => {
state.modes.commit.file_tree.page_down(amount);
}
ScrollDirection::Top => {
state.modes.commit.file_tree.select_first();
}
ScrollDirection::Bottom => {
state.modes.commit.file_tree.select_last();
}
}
}
PanelId::Center => {
// Message editor scroll - handled by component
}
PanelId::Right => {
// Diff view scroll
match direction {
ScrollDirection::Up => {
state.modes.commit.diff_view.scroll_up(amount);
}
ScrollDirection::Down => {
state.modes.commit.diff_view.scroll_down(amount);
}
_ => {}
}
}
},
Mode::Review => match state.focused_panel {
PanelId::Left => {
// File tree navigation
match direction {
ScrollDirection::Up => {
for _ in 0..amount {
state.modes.review.file_tree.select_prev();
}
}
ScrollDirection::Down => {
for _ in 0..amount {
state.modes.review.file_tree.select_next();
}
}
_ => {}
}
}
PanelId::Center => {
// Review content scroll (center panel shows review, not diff)
let max_scroll = state
.modes
.review
.review_content
.lines()
.count()
.saturating_sub(1);
match direction {
ScrollDirection::Up => {
state.modes.review.review_scroll =
state.modes.review.review_scroll.saturating_sub(amount);
}
ScrollDirection::Down => {
state.modes.review.review_scroll =
(state.modes.review.review_scroll + amount).min(max_scroll);
}
_ => {}
}
}
PanelId::Right => {
// Diff view scroll (right panel shows diff)
match direction {
ScrollDirection::Up => {
state.modes.review.diff_view.scroll_up(amount);
}
ScrollDirection::Down => {
state.modes.review.diff_view.scroll_down(amount);
}
_ => {}
}
}
},
Mode::PR => match state.focused_panel {
PanelId::Left => {
// Commits list navigation
match direction {
ScrollDirection::Up => {
if state.modes.pr.selected_commit > 0 {
state.modes.pr.selected_commit =
state.modes.pr.selected_commit.saturating_sub(amount);
if state.modes.pr.selected_commit < state.modes.pr.commit_scroll {
state.modes.pr.commit_scroll = state.modes.pr.selected_commit;
}
}
}
ScrollDirection::Down => {
let max_idx = state.modes.pr.commits.len().saturating_sub(1);
state.modes.pr.selected_commit =
(state.modes.pr.selected_commit + amount).min(max_idx);
}
_ => {}
}
}
PanelId::Center => {
// PR content scroll (center panel shows PR description)
let max_scroll = state.modes.pr.pr_content.lines().count().saturating_sub(1);
match direction {
ScrollDirection::Up => {
state.modes.pr.pr_scroll = state.modes.pr.pr_scroll.saturating_sub(amount);
}
ScrollDirection::Down => {
state.modes.pr.pr_scroll =
(state.modes.pr.pr_scroll + amount).min(max_scroll);
}
_ => {}
}
}
PanelId::Right => {
// Diff view scroll (right panel shows diff)
match direction {
ScrollDirection::Up => {
state.modes.pr.diff_view.scroll_up(amount);
}
ScrollDirection::Down => {
state.modes.pr.diff_view.scroll_down(amount);
}
_ => {}
}
}
},
Mode::Changelog => match state.focused_panel {
PanelId::Left => {
// Commits list navigation
match direction {
ScrollDirection::Up => {
if state.modes.changelog.selected_commit > 0 {
state.modes.changelog.selected_commit =
state.modes.changelog.selected_commit.saturating_sub(amount);
if state.modes.changelog.selected_commit
< state.modes.changelog.commit_scroll
{
state.modes.changelog.commit_scroll =
state.modes.changelog.selected_commit;
}
}
}
ScrollDirection::Down => {
let max_idx = state.modes.changelog.commits.len().saturating_sub(1);
state.modes.changelog.selected_commit =
(state.modes.changelog.selected_commit + amount).min(max_idx);
}
_ => {}
}
}
PanelId::Center => {
// Changelog content scroll
let max_scroll = state
.modes
.changelog
.changelog_content
.lines()
.count()
.saturating_sub(1);
match direction {
ScrollDirection::Up => {
state.modes.changelog.changelog_scroll = state
.modes
.changelog
.changelog_scroll
.saturating_sub(amount);
}
ScrollDirection::Down => {
state.modes.changelog.changelog_scroll =
(state.modes.changelog.changelog_scroll + amount).min(max_scroll);
}
_ => {}
}
}
PanelId::Right => {
// Diff view scroll
match direction {
ScrollDirection::Up => {
state.modes.changelog.diff_view.scroll_up(amount);
}
ScrollDirection::Down => {
state.modes.changelog.diff_view.scroll_down(amount);
}
_ => {}
}
}
},
Mode::ReleaseNotes => match state.focused_panel {
PanelId::Left => {
// Commits list navigation
match direction {
ScrollDirection::Up => {
if state.modes.release_notes.selected_commit > 0 {
state.modes.release_notes.selected_commit = state
.modes
.release_notes
.selected_commit
.saturating_sub(amount);
if state.modes.release_notes.selected_commit
< state.modes.release_notes.commit_scroll
{
state.modes.release_notes.commit_scroll =
state.modes.release_notes.selected_commit;
}
}
}
ScrollDirection::Down => {
let max_idx = state.modes.release_notes.commits.len().saturating_sub(1);
state.modes.release_notes.selected_commit =
(state.modes.release_notes.selected_commit + amount).min(max_idx);
}
_ => {}
}
}
PanelId::Center => {
// Release notes content scroll
let max_scroll = state
.modes
.release_notes
.release_notes_content
.lines()
.count()
.saturating_sub(1);
match direction {
ScrollDirection::Up => {
state.modes.release_notes.release_notes_scroll = state
.modes
.release_notes
.release_notes_scroll
.saturating_sub(amount);
}
ScrollDirection::Down => {
state.modes.release_notes.release_notes_scroll =
(state.modes.release_notes.release_notes_scroll + amount)
.min(max_scroll);
}
_ => {}
}
}
PanelId::Right => {
// Diff view scroll
match direction {
ScrollDirection::Up => {
state.modes.release_notes.diff_view.scroll_up(amount);
}
ScrollDirection::Down => {
state.modes.release_notes.diff_view.scroll_down(amount);
}
_ => {}
}
}
},
}
state.mark_dirty();
}