405 lines
10 KiB
Rust
405 lines
10 KiB
Rust
/*
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* meli - ui crate.
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*
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* Copyright 2017-2018 Manos Pitsidianakis
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*
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* This file is part of meli.
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*
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* meli is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* meli is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with meli. If not, see <http://www.gnu.org/licenses/>.
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*/
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/*!
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Components are ways to handle application data. They can draw on the terminal and receive events, but also do other stuff as well. (For example, see the `notifications` module.)
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See the `Component` Trait for more details.
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*/
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use super::*;
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pub mod mail;
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pub use crate::mail::*;
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pub mod notifications;
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pub mod indexer;
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pub use self::indexer::*;
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pub mod utilities;
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pub use self::utilities::*;
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pub mod contacts;
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pub use crate::contacts::*;
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use std::fmt;
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use std::fmt::{Debug, Display};
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use fnv::FnvHashMap;
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use uuid::Uuid;
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use super::{Key, StatusEvent, UIEvent};
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/// The upper and lower boundary char.
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const HORZ_BOUNDARY: char = '─';
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/// The left and right boundary char.
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const VERT_BOUNDARY: char = '│';
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/// The top-left corner
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const _TOP_LEFT_CORNER: char = '┌';
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/// The top-right corner
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const _TOP_RIGHT_CORNER: char = '┐';
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/// The bottom-left corner
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const _BOTTOM_LEFT_CORNER: char = '└';
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/// The bottom-right corner
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const _BOTTOM_RIGHT_CORNER: char = '┘';
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const LIGHT_VERTICAL_AND_RIGHT: char = '├';
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const _LIGHT_VERTICAL_AND_LEFT: char = '┤';
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const LIGHT_DOWN_AND_HORIZONTAL: char = '┬';
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const LIGHT_UP_AND_HORIZONTAL: char = '┴';
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const _DOUBLE_DOWN_AND_RIGHT: char = '╔';
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const _DOUBLE_DOWN_AND_LEFT: char = '╗';
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const _DOUBLE_UP_AND_LEFT: char = '╝';
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const _DOUBLE_UP_AND_RIGHT: char = '╚';
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type ComponentId = Uuid;
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pub type ShortcutMap = FnvHashMap<&'static str, Key>;
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pub type ShortcutMaps = FnvHashMap<String, ShortcutMap>;
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/// Types implementing this Trait can draw on the terminal and receive events.
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/// If a type wants to skip drawing if it has not changed anything, it can hold some flag in its
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/// fields (eg self.dirty = false) and act upon that in their `draw` implementation.
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pub trait Component: Display + Debug + Send {
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fn draw(&mut self, grid: &mut CellBuffer, area: Area, context: &mut Context);
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fn process_event(&mut self, event: &mut UIEvent, context: &mut Context) -> bool;
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fn is_dirty(&self) -> bool {
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true
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}
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fn is_visible(&self) -> bool {
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true
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}
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fn set_dirty(&mut self);
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fn kill(&mut self, _id: ComponentId) {}
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fn set_id(&mut self, _id: ComponentId) {}
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fn id(&self) -> ComponentId;
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fn get_shortcuts(&self, _context: &Context) -> ShortcutMaps {
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Default::default()
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}
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}
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/*
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pub(crate) fn is_box_char(ch: char) -> bool {
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match ch {
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HORZ_BOUNDARY | VERT_BOUNDARY => true,
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_ => false,
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}
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}
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* pub(crate) fn is_box_char(ch: char) -> bool {
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* match ch {
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* '└' | '─' | '┘' | '┴' | '┌' | '│' | '├' | '┐' | '┬' | '┤' | '┼' | '╷' | '╵' | '╴' | '╶' => true,
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* _ => false,
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* }
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* }
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*/
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fn bin_to_ch(b: u32) -> char {
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match b {
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0b0001 => '╶',
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0b0010 => '╵',
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0b0011 => '└',
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0b0100 => '╴',
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0b0101 => '─',
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0b0110 => '┘',
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0b0111 => '┴',
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0b1000 => '╷',
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0b1001 => '┌',
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0b1010 => '│',
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0b1011 => '├',
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0b1100 => '┐',
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0b1101 => '┬',
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0b1110 => '┤',
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0b1111 => '┼',
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x => unreachable!(format!("unreachable bin_to_ch(x), x = {:b}", x)),
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}
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}
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fn ch_to_bin(ch: char) -> Option<u32> {
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match ch {
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'└' => Some(0b0011),
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'─' => Some(0b0101),
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'┘' => Some(0b0110),
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'┴' => Some(0b0111),
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'┌' => Some(0b1001),
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'│' => Some(0b1010),
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'├' => Some(0b1011),
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'┐' => Some(0b1100),
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'┬' => Some(0b1101),
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'┤' => Some(0b1110),
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'┼' => Some(0b1111),
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'╷' => Some(0b1000),
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'╵' => Some(0b0010),
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'╴' => Some(0b0100),
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'╶' => Some(0b0001),
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_ => None,
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}
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}
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#[allow(clippy::never_loop)]
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fn set_and_join_vert(grid: &mut CellBuffer, idx: Pos) -> u32 {
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let (x, y) = idx;
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let mut bin_set = 0b1010;
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/* Check left side
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*
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* 1
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* -> 2 │ 0
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* 3
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*/
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loop {
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if x > 0 {
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if let Some(cell) = grid.get_mut(x - 1, y) {
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if let Some(adj) = ch_to_bin(cell.ch()) {
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if (adj & 0b0001) > 0 {
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bin_set |= 0b0100;
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break;
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} else if adj == 0b0100 {
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cell.set_ch(bin_to_ch(0b0101));
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cell.set_fg(Color::Byte(240));
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bin_set |= 0b0100;
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break;
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}
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}
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}
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}
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bin_set &= 0b1011;
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break;
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}
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/* Check right side
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*
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* 1
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* 2 │ 0 <-
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* 3
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*/
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loop {
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if let Some(cell) = grid.get_mut(x + 1, y) {
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if let Some(adj) = ch_to_bin(cell.ch()) {
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if (adj & 0b0100) > 0 {
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bin_set |= 0b0001;
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break;
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}
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}
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}
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bin_set &= 0b1110;
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break;
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}
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/* Set upper side
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*
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* 1 <-
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* 2 │ 0
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* 3
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*/
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loop {
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if y > 0 {
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if let Some(cell) = grid.get_mut(x, y - 1) {
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if let Some(adj) = ch_to_bin(cell.ch()) {
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cell.set_ch(bin_to_ch(adj | 0b1000));
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cell.set_fg(Color::Byte(240));
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} else {
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bin_set &= 0b1101;
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}
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}
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}
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break;
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}
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/* Set bottom side
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*
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* 1
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* 2 │ 0
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* 3 <-
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*/
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loop {
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if let Some(cell) = grid.get_mut(x, y + 1) {
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if let Some(adj) = ch_to_bin(cell.ch()) {
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cell.set_ch(bin_to_ch(adj | 0b0010));
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cell.set_fg(Color::Byte(240));
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} else {
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bin_set &= 0b0111;
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}
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}
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break;
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}
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if bin_set == 0 {
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bin_set = 0b1010;
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}
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bin_set
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}
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#[allow(clippy::never_loop)]
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fn set_and_join_horz(grid: &mut CellBuffer, idx: Pos) -> u32 {
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let (x, y) = idx;
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let mut bin_set = 0b0101;
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/* Check upper side
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*
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* 1 <-
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* 2 ─ 0
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* 3
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*/
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loop {
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if y > 0 {
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if let Some(cell) = grid.get_mut(x, y - 1) {
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if let Some(adj) = ch_to_bin(cell.ch()) {
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if (adj & 0b1000) > 0 {
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bin_set |= 0b0010;
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break;
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} else if adj == 0b0010 {
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bin_set |= 0b0010;
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cell.set_ch(bin_to_ch(0b1010));
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cell.set_fg(Color::Byte(240));
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break;
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}
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}
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}
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}
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bin_set &= 0b1101;
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break;
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}
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/* Check bottom side
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*
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* 1
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* 2 ─ 0
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* 3 <-
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*/
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loop {
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if let Some(cell) = grid.get_mut(x, y + 1) {
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if let Some(adj) = ch_to_bin(cell.ch()) {
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if (adj & 0b0010) > 0 {
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bin_set |= 0b1000;
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break;
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} else if adj == 0b1000 {
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bin_set |= 0b1000;
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cell.set_ch(bin_to_ch(0b1010));
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cell.set_fg(Color::Byte(240));
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break;
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}
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}
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}
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bin_set &= 0b0111;
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break;
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}
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/* Set left side
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*
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* 1
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* -> 2 ─ 0
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* 3
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*/
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loop {
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if x > 0 {
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if let Some(cell) = grid.get_mut(x - 1, y) {
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if let Some(adj) = ch_to_bin(cell.ch()) {
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cell.set_ch(bin_to_ch(adj | 0b0001));
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cell.set_fg(Color::Byte(240));
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} else {
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bin_set &= 0b1011;
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}
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}
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}
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break;
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}
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/* Set right side
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*
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* 1
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* 2 ─ 0 <-
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* 3
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*/
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loop {
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if let Some(cell) = grid.get_mut(x + 1, y) {
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if let Some(adj) = ch_to_bin(cell.ch()) {
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cell.set_ch(bin_to_ch(adj | 0b0100));
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cell.set_fg(Color::Byte(240));
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} else {
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bin_set &= 0b1110;
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}
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}
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break;
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}
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if bin_set == 0 {
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bin_set = 0b0101;
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}
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bin_set
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}
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pub(crate) fn set_and_join_box(grid: &mut CellBuffer, idx: Pos, ch: char) {
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/* Connected sides:
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*
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* 1
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* 2 c 0
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* 3
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*
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* #3210
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* 0b____
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*/
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let bin_set = match ch {
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'│' => set_and_join_vert(grid, idx),
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'─' => set_and_join_horz(grid, idx),
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_ => unreachable!(),
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};
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grid[idx].set_ch(bin_to_ch(bin_set));
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grid[idx].set_fg(Color::Byte(240));
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}
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pub fn create_box(grid: &mut CellBuffer, area: Area) {
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if !is_valid_area!(area) {
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return;
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}
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let upper_left = upper_left!(area);
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let bottom_right = bottom_right!(area);
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for x in get_x(upper_left)..get_x(bottom_right) {
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grid[(x, get_y(upper_left))].set_ch(HORZ_BOUNDARY);
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grid[(x, get_y(bottom_right))].set_ch(HORZ_BOUNDARY);
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grid[(x, get_y(bottom_right))].set_fg(Color::Byte(240));
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}
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for y in get_y(upper_left)..get_y(bottom_right) {
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grid[(get_x(upper_left), y)].set_ch(VERT_BOUNDARY);
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grid[(get_x(bottom_right), y)].set_ch(VERT_BOUNDARY);
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grid[(get_x(bottom_right), y)].set_fg(Color::Byte(240));
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}
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set_and_join_box(grid, upper_left, HORZ_BOUNDARY);
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set_and_join_box(grid, set_x(upper_left, get_x(bottom_right)), HORZ_BOUNDARY);
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set_and_join_box(grid, set_y(upper_left, get_y(bottom_right)), VERT_BOUNDARY);
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set_and_join_box(grid, bottom_right, VERT_BOUNDARY);
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}
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