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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, Modifier, 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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use unicode_width::UnicodeWidthStr;
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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 column_page_start: std::cell::Cell<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: 0,
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column_page_start: std::cell::Cell::new(0),
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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().saturating_sub(1) {
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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 == 0 {
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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 is_row_number_clumn(&self, row_index: usize, column_index: usize) -> bool {
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matches!(self.state.selected(), Some(selected_row_index) if row_index == selected_row_index && 0 == column_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)
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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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self.headers.clone()
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}
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pub fn headers_with_number(&self, left: usize, right: usize) -> Vec<String> {
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let mut headers = self.headers.clone()[left..right].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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self.rows.clone()
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}
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pub fn rows_with_number(&self, left: usize, right: usize) -> 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.to_vec())
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.collect::<Vec<Vec<String>>>();
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let mut new_rows: Vec<Vec<String>> =
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rows.iter().map(|row| row[left..right].to_vec()).collect();
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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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pub fn calculate_widths(
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&self,
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area_width: u16,
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) -> (usize, Vec<String>, Vec<Vec<String>>, Vec<Constraint>) {
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if self.rows.is_empty() {
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return (0, Vec::new(), Vec::new(), Vec::new());
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}
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if self.column_index < self.column_page_start.get() {
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self.column_page_start.set(self.column_index);
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}
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let right_column_index = self.column_index.clone();
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let mut column_index = self.column_index;
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let number_clomn_width = (self.rows.len() + 1).to_string().width() as u16;
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let mut widths = vec![];
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loop {
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let length = self
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.rows()
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.iter()
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.map(|row| {
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row.get(column_index)
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.map_or(String::new(), |cell| cell.to_string())
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.width()
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})
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.collect::<Vec<usize>>()
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.iter()
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.max()
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.map_or(3, |v| {
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*v.max(
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&self
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.headers()
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.get(column_index)
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.map_or(3, |header| header.to_string().width()),
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)
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.clamp(&3, &20) as u16
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});
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if widths.iter().map(|(_, width)| width).sum::<u16>() + length
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> area_width
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.saturating_sub(7)
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.saturating_sub(number_clomn_width)
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{
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column_index += 1;
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break;
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}
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widths.push((self.headers[column_index].clone(), length));
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if column_index == self.column_page_start.get() {
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break;
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}
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column_index -= 1;
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}
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let left_column_index = column_index;
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widths.reverse();
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let selected_column_index = widths.len().saturating_sub(1);
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let mut column_index = right_column_index + 1;
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while widths.iter().map(|(_, width)| width).sum::<u16>()
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<= area_width
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.saturating_sub(7)
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.saturating_sub(number_clomn_width)
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{
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let length = self
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.rows()
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.iter()
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.map(|row| {
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row.get(column_index)
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.map_or(String::new(), |cell| cell.to_string())
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.width()
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})
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.collect::<Vec<usize>>()
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.iter()
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.max()
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.map_or(3, |v| {
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*v.max(
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self.headers()
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.iter()
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.map(|header| header.to_string().width())
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.collect::<Vec<usize>>()
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.get(column_index)
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.unwrap_or(&3),
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)
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.clamp(&3, &20) as u16
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});
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match self.headers.get(column_index) {
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Some(header) => {
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widths.push((header.to_string(), length));
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}
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None => break,
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}
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column_index += 1
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}
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if self.column_index != self.headers.len().saturating_sub(1) {
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widths.pop();
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}
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let right_column_index = column_index;
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let mut constraints = widths
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.iter()
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.map(|(_, width)| Constraint::Length(*width))
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.collect::<Vec<Constraint>>();
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if self.column_index != self.headers.len().saturating_sub(1) {
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constraints.push(Constraint::Min(10));
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}
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constraints.insert(0, Constraint::Length(number_clomn_width));
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self.column_page_start.set(left_column_index);
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(
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selected_column_index + 1,
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self.headers_with_number(left_column_index, right_column_index),
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self.rows_with_number(left_column_index, right_column_index),
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constraints,
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)
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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 block = Block::default().borders(Borders::ALL).title("Records");
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let (selected_column_index, headers, rows, constraints) =
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self.calculate_widths(block.inner(layout[1]).width);
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let header_cells = headers.iter().enumerate().map(|(column_index, h)| {
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Cell::from(h.to_string()).style(if selected_column_index == column_index {
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Style::default().add_modifier(Modifier::BOLD)
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} else {
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Style::default()
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})
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});
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let header = Row::new(header_cells).height(1).bottom_margin(1);
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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 matches!(self.state.selected(), Some(selected_row_index) if row_index == selected_row_index && selected_column_index == column_index) {
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|
|
Style::default().bg(Color::Blue)
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|
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} else if self.is_row_number_clumn(row_index, column_index) {
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|
|
Style::default().add_modifier(Modifier::BOLD)
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|
|
} else {
|
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|
|
Style::default()
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|
|
})
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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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|
|
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let table = Table::new(rows)
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|
|
.header(header)
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|
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.block(block)
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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()
|
|
|
|
} else {
|
|
|
|
Style::default().fg(Color::DarkGray)
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|
|
|
})
|
|
|
|
.widths(&constraints);
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|
|
f.render_stateful_widget(table, layout[1], &mut self.state);
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|
|
|
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|
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self.scroll.draw(f, layout[1]);
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|
|
Ok(())
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|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
impl Component for TableComponent {
|
|
|
|
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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|
|
}
|
|
|
|
Key::Ctrl('d') => {
|
|
|
|
self.next(10);
|
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|
|
return Ok(EventState::NotConsumed);
|
|
|
|
}
|
|
|
|
Key::Char('k') => {
|
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|
|
self.previous(1);
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|
|
return Ok(EventState::Consumed);
|
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|
|
}
|
|
|
|
Key::Ctrl('u') => {
|
|
|
|
self.previous(10);
|
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|
|
return Ok(EventState::Consumed);
|
|
|
|
}
|
|
|
|
Key::Char('g') => {
|
|
|
|
self.scroll_top();
|
|
|
|
return Ok(EventState::Consumed);
|
|
|
|
}
|
|
|
|
Key::Char('r') => {
|
|
|
|
self.select_entire_row = true;
|
|
|
|
return Ok(EventState::Consumed);
|
|
|
|
}
|
|
|
|
Key::Char('G') => {
|
|
|
|
self.scroll_bottom();
|
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|
|
return Ok(EventState::Consumed);
|
|
|
|
}
|
|
|
|
Key::Char('l') => {
|
|
|
|
self.next_column();
|
|
|
|
return Ok(EventState::Consumed);
|
|
|
|
}
|
|
|
|
_ => (),
|
|
|
|
}
|
|
|
|
Ok(EventState::NotConsumed)
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
#[cfg(test)]
|
|
|
|
mod test {
|
|
|
|
use super::TableComponent;
|
|
|
|
use tui::layout::Constraint;
|
|
|
|
|
|
|
|
#[test]
|
|
|
|
fn test_headers() {
|
|
|
|
let mut component = TableComponent::default();
|
|
|
|
component.headers = vec!["a", "b", "c"].iter().map(|h| h.to_string()).collect();
|
|
|
|
assert_eq!(component.headers_with_number(1, 2), vec!["", "b"])
|
|
|
|
}
|
|
|
|
|
|
|
|
#[test]
|
|
|
|
fn test_rows() {
|
|
|
|
let mut component = TableComponent::default();
|
|
|
|
component.rows = vec![
|
|
|
|
vec!["a", "b", "c"].iter().map(|h| h.to_string()).collect(),
|
|
|
|
vec!["d", "e", "f"].iter().map(|h| h.to_string()).collect(),
|
|
|
|
];
|
|
|
|
assert_eq!(
|
|
|
|
component.rows_with_number(1, 2),
|
|
|
|
vec![vec!["1", "b"], vec!["2", "e"]],
|
|
|
|
)
|
|
|
|
}
|
|
|
|
|
|
|
|
#[test]
|
|
|
|
fn test_calculate_widths() {
|
|
|
|
let mut component = TableComponent::default();
|
|
|
|
component.headers = vec!["1", "2", "3"].iter().map(|h| h.to_string()).collect();
|
|
|
|
component.rows = vec![
|
|
|
|
vec!["aaaaa", "bbbbb", "ccccc"]
|
|
|
|
.iter()
|
|
|
|
.map(|h| h.to_string())
|
|
|
|
.collect(),
|
|
|
|
vec!["d", "e", "f"].iter().map(|h| h.to_string()).collect(),
|
|
|
|
];
|
|
|
|
let (selected_column_index, headers, rows, constraints) = component.calculate_widths(17);
|
|
|
|
assert_eq!(selected_column_index, 1);
|
|
|
|
assert_eq!(headers, vec!["", "1", "2"]);
|
|
|
|
assert_eq!(rows, vec![vec!["1", "aaaaa", "bbbbb"], vec!["2", "d", "e"]]);
|
|
|
|
assert_eq!(
|
|
|
|
constraints,
|
|
|
|
vec![
|
|
|
|
Constraint::Length(1),
|
|
|
|
Constraint::Length(5),
|
|
|
|
Constraint::Min(10),
|
|
|
|
]
|
|
|
|
);
|
|
|
|
|
|
|
|
let (selected_column_index, headers, rows, constraints) = component.calculate_widths(27);
|
|
|
|
assert_eq!(selected_column_index, 1);
|
|
|
|
assert_eq!(headers, vec!["", "1", "2", "3"]);
|
|
|
|
assert_eq!(
|
|
|
|
rows,
|
|
|
|
vec![
|
|
|
|
vec!["1", "aaaaa", "bbbbb", "ccccc"],
|
|
|
|
vec!["2", "d", "e", "f"]
|
|
|
|
]
|
|
|
|
);
|
|
|
|
assert_eq!(
|
|
|
|
constraints,
|
|
|
|
vec![
|
|
|
|
Constraint::Length(1),
|
|
|
|
Constraint::Length(5),
|
|
|
|
Constraint::Length(5),
|
|
|
|
Constraint::Min(10),
|
|
|
|
]
|
|
|
|
);
|
|
|
|
}
|
|
|
|
}
|