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use std::path::PathBuf;
use crate::context::AppContext;
use crate::error::AppResult;
use crate::preview::preview_file::PreviewFileState;
fn preview_cursor_move(context: &mut AppContext, new_index: usize) -> AppResult {
let file_path: Option<PathBuf> = {
let curr_tab = context.tab_context_ref().curr_tab_ref();
let curr_list = curr_tab.curr_list_ref();
let curr_entry = curr_list.and_then(|c| c.curr_entry_ref());
curr_entry.map(|e| e.file_path().to_path_buf())
};
let preview_context = context.preview_context_mut();
if let Some(file_path) = file_path {
if let Some(PreviewFileState::Success(data)) =
preview_context.previews_mut().get_mut(&file_path)
{
data.index = new_index;
}
}
Ok(())
}
pub fn preview_up(context: &mut AppContext, u: usize) -> AppResult {
let new_index = {
let curr_tab = context.tab_context_ref().curr_tab_ref();
let curr_list = curr_tab.curr_list_ref();
let curr_entry = curr_list.and_then(|c| c.curr_entry_ref());
let file_path = curr_entry.map(|e| e.file_path());
let preview_context = context.preview_context_ref();
if let Some(file_path) = file_path {
if let Some(PreviewFileState::Success(data)) =
preview_context.previews_ref().get(file_path)
{
if data.index < u {
Some(0)
} else {
Some(data.index - u)
}
} else {
None
}
} else {
None
}
};
if let Some(new_index) = new_index {
preview_cursor_move(context, new_index)?;
}
Ok(())
}
pub fn preview_down(context: &mut AppContext, u: usize) -> AppResult {
let new_index = {
let curr_tab = context.tab_context_ref().curr_tab_ref();
let curr_list = curr_tab.curr_list_ref();
let curr_entry = curr_list.and_then(|c| c.curr_entry_ref());
let file_path = curr_entry.map(|e| e.file_path());
let preview_context = context.preview_context_ref();
if let Some(file_path) = file_path {
if let Some(PreviewFileState::Success(data)) =
preview_context.previews_ref().get(file_path)
{
Some(data.index + u)
} else {
None
}
} else {
None
}
};
if let Some(new_index) = new_index {
preview_cursor_move(context, new_index)?;
}
Ok(())
}
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