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317 lines
9.0 KiB
Rust
317 lines
9.0 KiB
Rust
use super::{
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utils::scroll_vertical::VerticalScroll, Component, DrawableComponent, EventState,
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TableValueComponent,
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};
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use crate::event::Key;
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use anyhow::Result;
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use std::convert::From;
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use tui::{
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backend::Backend,
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layout::{Constraint, Direction, Layout, Rect},
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style::{Color, Style},
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widgets::{Block, Borders, Cell, Row, Table, TableState},
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Frame,
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};
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pub struct TableComponent {
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pub state: TableState,
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pub headers: Vec<String>,
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pub rows: Vec<Vec<String>>,
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pub column_index: usize,
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pub column_page: usize,
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pub scroll: VerticalScroll,
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pub select_entire_row: bool,
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pub eod: bool,
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}
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impl Default for TableComponent {
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fn default() -> Self {
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Self {
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state: TableState::default(),
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headers: vec![],
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rows: vec![],
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column_page: 0,
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column_index: 1,
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scroll: VerticalScroll::new(),
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select_entire_row: false,
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eod: false,
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}
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}
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}
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impl TableComponent {
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pub fn new(rows: Vec<Vec<String>>, headers: Vec<String>) -> Self {
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let mut state = TableState::default();
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if !rows.is_empty() {
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state.select(None);
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state.select(Some(0))
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}
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Self {
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rows,
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headers,
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state,
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..Self::default()
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}
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}
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pub fn end(&mut self) {
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self.eod = true;
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}
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pub fn next(&mut self, lines: usize) {
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let i = match self.state.selected() {
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Some(i) => {
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if i + lines >= self.rows.len() {
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Some(self.rows.len() - 1)
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} else {
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Some(i + lines)
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}
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}
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None => None,
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};
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self.select_entire_row = false;
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self.state.select(i);
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}
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pub fn previous(&mut self, lines: usize) {
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let i = match self.state.selected() {
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Some(i) => {
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if i <= lines {
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Some(0)
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} else {
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Some(i - lines)
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}
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}
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None => None,
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};
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self.select_entire_row = false;
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self.state.select(i);
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}
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pub fn scroll_top(&mut self) {
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if self.rows.is_empty() {
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return;
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}
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self.state.select(None);
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self.state.select(Some(0));
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}
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pub fn scroll_bottom(&mut self) {
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if self.rows.is_empty() {
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return;
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}
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self.state.select(Some(self.rows.len() - 1));
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}
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pub fn next_column(&mut self) {
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if self.rows.is_empty() {
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return;
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}
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if self.column_index == self.headers.len() {
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return;
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}
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if self.column_index == 9 {
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self.next_column_page();
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return;
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}
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self.select_entire_row = false;
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self.column_index += 1;
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}
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pub fn previous_column(&mut self) {
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if self.rows.is_empty() {
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return;
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}
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if self.column_index == 1 {
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self.previous_column_page();
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return;
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}
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self.select_entire_row = false;
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self.column_index -= 1;
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}
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pub fn next_column_page(&mut self) {
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if self.headers.len() > 9 && self.column_page < self.headers.len() - 9 {
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self.column_page += 1
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}
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}
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pub fn previous_column_page(&mut self) {
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if self.column_page > 0 {
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self.column_page -= 1
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}
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}
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pub fn is_selected_cell(&self, row_index: usize, column_index: usize) -> bool {
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if column_index != self.column_index {
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return false;
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}
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matches!(self.state.selected(), Some(selected_row_index) if row_index == selected_row_index)
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}
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pub fn selected_cell(&self) -> Option<String> {
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self.rows
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.get(self.state.selected()?)?
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.get(self.column_index.saturating_sub(1) + self.column_page)
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.map(|cell| cell.to_string())
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}
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pub fn headers(&self) -> Vec<String> {
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let mut headers = self.headers[self.column_page..].to_vec();
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headers.insert(0, "".to_string());
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headers
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}
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pub fn rows(&self) -> Vec<Vec<String>> {
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let rows = self
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.rows
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.iter()
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.map(|row| row[self.column_page..].to_vec())
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.collect::<Vec<Vec<String>>>();
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let mut new_rows = rows;
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for (index, row) in new_rows.iter_mut().enumerate() {
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row.insert(0, (index + 1).to_string())
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}
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new_rows
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}
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}
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impl DrawableComponent for TableComponent {
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fn draw<B: Backend>(&mut self, f: &mut Frame<B>, area: Rect, focused: bool) -> Result<()> {
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let layout = Layout::default()
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.direction(Direction::Vertical)
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.constraints(vec![Constraint::Length(3), Constraint::Length(5)])
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.split(area);
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self.state.selected().map_or_else(
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|| {
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self.scroll.reset();
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},
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|selection| {
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self.scroll.update(
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selection,
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self.rows.len(),
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layout[1].height.saturating_sub(2) as usize,
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);
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},
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);
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TableValueComponent::new(self.selected_cell().unwrap_or_default())
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.draw(f, layout[0], focused)?;
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let headers = self.headers();
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let header_cells = headers
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.iter()
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.map(|h| Cell::from(h.to_string()).style(Style::default()));
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let header = Row::new(header_cells).height(1).bottom_margin(1);
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let rows = self.rows();
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let rows = rows.iter().enumerate().map(|(row_index, item)| {
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let height = item
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.iter()
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.map(|content| content.chars().filter(|c| *c == '\n').count())
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.max()
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.unwrap_or(0)
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+ 1;
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let cells = item.iter().enumerate().map(|(column_index, c)| {
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Cell::from(c.to_string()).style(if self.is_selected_cell(row_index, column_index) {
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Style::default().bg(Color::Blue)
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} else {
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Style::default()
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})
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});
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Row::new(cells).height(height as u16).bottom_margin(1)
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});
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let widths = (0..10)
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.map(|_| Constraint::Percentage(10))
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.collect::<Vec<Constraint>>();
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let table = Table::new(rows)
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.header(header)
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.block(Block::default().borders(Borders::ALL).title("Records"))
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.highlight_style(if self.select_entire_row {
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Style::default().bg(Color::Blue)
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} else {
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Style::default()
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})
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.style(if focused {
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Style::default()
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} else {
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Style::default().fg(Color::DarkGray)
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})
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.widths(&widths);
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f.render_stateful_widget(table, layout[1], &mut self.state);
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self.scroll.draw(f, layout[1]);
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Ok(())
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}
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}
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impl Component for TableComponent {
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fn event(&mut self, key: Key) -> Result<EventState> {
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match key {
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Key::Char('h') => {
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self.previous_column();
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return Ok(EventState::Consumed);
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}
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Key::Char('j') => {
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self.next(1);
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return Ok(EventState::NotConsumed);
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}
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Key::Ctrl('d') => {
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self.next(10);
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return Ok(EventState::NotConsumed);
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}
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Key::Char('k') => {
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self.previous(1);
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return Ok(EventState::Consumed);
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}
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Key::Ctrl('u') => {
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self.previous(10);
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return Ok(EventState::Consumed);
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}
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Key::Char('g') => {
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self.scroll_top();
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return Ok(EventState::Consumed);
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}
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Key::Char('r') => {
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self.select_entire_row = true;
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return Ok(EventState::Consumed);
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}
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Key::Char('G') => {
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self.scroll_bottom();
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return Ok(EventState::Consumed);
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}
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Key::Char('l') => {
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self.next_column();
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return Ok(EventState::Consumed);
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}
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_ => (),
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}
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Ok(EventState::NotConsumed)
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}
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}
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#[cfg(test)]
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mod test {
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use super::TableComponent;
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#[test]
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fn test_headers() {
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let mut component = TableComponent::default();
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component.headers = vec!["a", "b", "c"].iter().map(|h| h.to_string()).collect();
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assert_eq!(component.headers(), vec!["", "a", "b", "c"])
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}
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#[test]
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fn test_rows() {
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let mut component = TableComponent::default();
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component.rows = vec![
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vec!["a", "b", "c"].iter().map(|h| h.to_string()).collect(),
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vec!["d", "e", "f"].iter().map(|h| h.to_string()).collect(),
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];
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assert_eq!(
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component.rows(),
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vec![vec!["1", "a", "b", "c"], vec!["2", "d", "e", "f"]],
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)
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}
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}
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