281 lines
9.3 KiB
Rust
281 lines
9.3 KiB
Rust
/*
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* meli - ui module.
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*
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* Copyright 2017 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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extern crate ncurses;
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extern crate maildir;
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extern crate mailparse;
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extern crate chrono;
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use mailbox::*;
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use self::chrono::NaiveDateTime;
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/* Index represents a UI list of mails */
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pub struct Index {
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mailbox: Mailbox,
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win: ncurses::WINDOW,
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pad: ncurses::WINDOW,
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screen_width: i32,
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screen_height: i32,
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threaded: bool,
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cursor_idx: usize,
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}
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impl Index {
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pub fn new(mailbox: Mailbox) -> Index {
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let mut screen_height = 0;
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let mut screen_width = 0;
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/* Get the screen bounds. */
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ncurses::getmaxyx(ncurses::stdscr(), &mut screen_height, &mut screen_width);
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// let win = ncurses::newwin( ncurses::LINES(), ncurses::COLS()-30, 0, 30);
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let win = ncurses::newwin(0, 0, 0, 0);
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ncurses::getmaxyx(win, &mut screen_height, &mut screen_width);
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//eprintln!("length is {}\n", length);
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let pad = ncurses::newpad(mailbox.get_length() as i32, screen_width);
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ncurses::wbkgd(
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pad,
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' ' as ncurses::chtype |
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ncurses::COLOR_PAIR(super::COLOR_PAIR_DEFAULT) as ncurses::chtype,
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);
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Index {
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mailbox: mailbox,
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win: win,
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pad: pad,
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screen_width: 0,
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screen_height: 0,
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threaded: true,
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cursor_idx: 0,
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}
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}
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pub fn draw(&mut self) {
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let mut x = 0;
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let mut y = 0;
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ncurses::getbegyx(self.win, &mut y, &mut x);
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ncurses::wclear(self.pad);
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let mut idx = 0;
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if self.threaded {
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/* Draw threaded view. */
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for i in self.mailbox.threaded_collection.iter() {
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let container = self.mailbox.get_thread(*i);
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assert!(container.has_message(), true);
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let x = &self.mailbox.collection[container.get_message().unwrap()];
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if idx == self.cursor_idx {
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Index::draw_entry(self.pad, x, idx, container.get_indentation(), false, true);
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} else {
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Index::draw_entry(self.pad, x, idx, container.get_indentation(), false, false);
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}
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idx += 1;
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}
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} else {
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for x in self.mailbox.collection.as_mut_slice() {
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if idx == self.cursor_idx {
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Index::draw_entry(self.pad, x, idx, 0, false, true);
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} else {
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Index::draw_entry(self.pad, x, idx, 0, false, false);
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}
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idx += 1;
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}
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}
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ncurses::getmaxyx(self.win, &mut self.screen_height, &mut self.screen_width);
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let pminrow =
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(self.cursor_idx as i32).wrapping_div(self.screen_height) * self.screen_height;
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ncurses::prefresh(
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self.pad,
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pminrow,
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0,
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y,
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x,
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self.screen_height - 1,
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self.screen_width - 1,
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);
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}
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pub fn scroll(&mut self, motion: i32) {
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ncurses::getmaxyx(self.win, &mut self.screen_height, &mut self.screen_width);
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if self.screen_height == 0 {
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return;
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}
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let mut x = 0;
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let mut y = 0;
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ncurses::getbegyx(self.win, &mut y, &mut x);
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let prev_idx = self.cursor_idx;
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match motion {
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ncurses::KEY_UP => {
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if self.cursor_idx > 0 {
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self.cursor_idx -= 1;
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} else {
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return;
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}
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}
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ncurses::KEY_DOWN => {
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if self.cursor_idx < self.mailbox.get_length() - 1 {
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self.cursor_idx += 1;
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} else {
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return;
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}
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}
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_ => {
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return;
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}
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}
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/* Draw newly highlighted entry */
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ncurses::wmove(self.pad, self.cursor_idx as i32, 0);
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/* Borrow x from self.mailbox in separate scopes or else borrow checker complains */
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{
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let i: usize =
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if self.threaded {
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self.mailbox.get_threaded_mail(self.cursor_idx)
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} else {
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self.cursor_idx
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};
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let (ref mut x, thread) = self.mailbox.get_mail_and_thread(i);
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Index::draw_entry(self.pad, x, self.cursor_idx, thread.get_indentation(), false, true);
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}
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/* Draw previous highlighted entry normally */
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ncurses::wmove(self.pad, prev_idx as i32, 0);
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{
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let i: usize =
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if self.threaded {
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self.mailbox.get_threaded_mail(prev_idx)
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} else {
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prev_idx
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};
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let (ref mut x, thread) = self.mailbox.get_mail_and_thread(i);
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Index::draw_entry(self.pad, x, prev_idx, thread.get_indentation(), false, false);
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}
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/* Calculate the pad row of the first entry to be displayed in the window */
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let pminrow =
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(self.cursor_idx as i32).wrapping_div(self.screen_height) * self.screen_height;
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let pminrow_prev = (prev_idx as i32).wrapping_div(self.screen_height) * self.screen_height;
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/*
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* Refresh window if new page has less rows than window rows, ie
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* window rows = r
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* pad rows (total emails) = n
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* pminrow = i
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*
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* ┌- i
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* │ i+1
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* │ i+2
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* r ┤ ...
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* │ n
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* │ .. ┐
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* │ i-2 ├ 'dead' entries (must be cleared)
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* └ i-1 ┘
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*/
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if pminrow != pminrow_prev &&
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pminrow + self.screen_height > self.mailbox.get_length() as i32 {
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/* touch Index window (tell ncurses to redraw the entire window in
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* next refresh) */
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ncurses::touchwin(self.win);
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ncurses::wrefresh(self.win);
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}
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ncurses::prefresh(
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self.pad,
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pminrow,
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0,
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y,
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x,
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self.screen_height - 1,
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self.screen_width - 1,
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);
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}
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fn draw_entry(win: ncurses::WINDOW, mail: &Mail, i: usize, indent: usize,
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has_sibling: bool, highlight: bool) {
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if highlight {
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ncurses::wattron(win,
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ncurses::COLOR_PAIR(super::COLOR_PAIR_CURSOR));
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}
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ncurses::waddstr(win, &format!("{}\t", i));
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let dt = NaiveDateTime::from_timestamp(mail.get_date(), 0);
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ncurses::waddstr(win, &dt.format("%Y-%m-%d %H:%M:%S").to_string());
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ncurses::waddch(win, '\t' as u64);
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for _ in 0..indent {
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ncurses::waddch(win, ' ' as u64);
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}
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if indent > 0 {
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ncurses::wattron(win,
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ncurses::COLOR_PAIR(super::COLOR_PAIR_THREAD_INDENT));
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if has_sibling {
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ncurses::waddstr(win, "│");
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} else {
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ncurses::waddstr(win, "└");
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}
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ncurses::waddstr(win, "->");
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ncurses::wattroff(win,
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ncurses::COLOR_PAIR(super::COLOR_PAIR_THREAD_INDENT));
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}
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if highlight {
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ncurses::wattron(win,
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ncurses::COLOR_PAIR(super::COLOR_PAIR_CURSOR));
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}
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ncurses::waddstr(win, &format!("{:.85}",mail.get_subject()));
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if highlight {
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ncurses::wattroff(win,
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ncurses::COLOR_PAIR(super::COLOR_PAIR_CURSOR));
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}
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ncurses::waddstr(win, "\n");
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}
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pub fn show_pager(&mut self) {
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ncurses::getmaxyx(self.win,
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&mut self.screen_height, &mut self.screen_width);
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let x: &mut Mail;
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if self.threaded {
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let i = self.mailbox.get_threaded_mail(self.cursor_idx);
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x = &mut self.mailbox.collection[i];
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} else {
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x = &mut self.mailbox.collection[self.cursor_idx];
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}
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let mut pager = super::pager::Pager::new(self.win, &mut x.get_entry());
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pager.scroll(ncurses::KEY_DOWN);
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pager.scroll(ncurses::KEY_UP);
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let mut ch = ncurses::getch();
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while ch != ncurses::KEY_F(1) {
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match ch {
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m @ ncurses::KEY_UP |
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m @ ncurses::KEY_DOWN |
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m @ ncurses::KEY_NPAGE |
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m @ ncurses::KEY_PPAGE => {
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pager.scroll(m);
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}
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_ => {}
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}
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ch = ncurses::getch();
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}
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drop(pager); // drop pager before next refresh
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ncurses::wrefresh(self.win);
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}
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}
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impl Drop for Index {
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fn drop(&mut self) {
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ncurses::delwin(self.win);
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ncurses::delwin(self.pad);
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ncurses::endwin();
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}
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}
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