621 lines
22 KiB
Rust
621 lines
22 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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use super::*;
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use std::cmp;
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#[derive(Debug, Clone)]
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struct ThreadEntry {
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index: (usize, usize, usize),
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/// (indentation, container index, line number in listing)
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indentation: usize,
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msg_idx: usize,
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}
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#[derive(Debug, Default)]
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pub struct ThreadView {
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new_cursor_pos: usize,
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cursor_pos: usize,
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expanded_pos: usize,
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new_expanded_pos: usize,
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dirty: bool,
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coordinates: (usize, usize, usize),
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mailview: MailView,
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show_mailview: bool,
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entries: Vec<ThreadEntry>,
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content: CellBuffer,
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initiated: bool,
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}
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impl ThreadView {
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/*
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* coordinates: (account index, mailbox index, root set container index)
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* expanded_idx: optional position of expanded entry when we render the threadview. Default
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* expanded message is the last one.
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* context: current context
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*/
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pub fn new(
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coordinates: (usize, usize, usize),
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expanded_idx: Option<usize>,
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context: &Context,
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) -> Self {
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/* stack to push thread messages in order in order to pop and print them later */
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let mut stack: Vec<(usize, usize)> = Vec::with_capacity(32);
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let mailbox = &context.accounts[coordinates.0][coordinates.1]
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.as_ref()
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.unwrap();
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let threads = &mailbox.threads;
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let container = &threads.containers()[threads.root_set()[coordinates.2]];
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if container.message().is_some() {
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stack.push((0, threads.root_set()[coordinates.2]));
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} else {
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stack.push((1, container.first_child().unwrap()));
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}
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let mut view = ThreadView {
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dirty: true,
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initiated: false,
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coordinates,
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mailview: MailView::default(),
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show_mailview: true,
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entries: Vec::new(),
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cursor_pos: 1,
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new_cursor_pos: 0,
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..Default::default()
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};
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let mut line = 0;
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let mut max_ind = 0;
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while let Some((ind, idx)) = stack.pop() {
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max_ind = cmp::max(max_ind, ind);
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let entry = view.make_entry(context, (ind, idx, line));
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view.entries.push(entry);
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line += 1;
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match expanded_idx {
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Some(expanded_idx) if expanded_idx == idx => {
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view.new_expanded_pos = view.entries.len().saturating_sub(1);
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view.expanded_pos = view.new_expanded_pos + 1;
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}
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_ => {}
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}
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let container = &threads.containers()[idx];
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if let Some(i) = container.next_sibling() {
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stack.push((ind, i));
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}
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if let Some(i) = container.first_child() {
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stack.push((ind + 1, i));
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}
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}
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if expanded_idx.is_none() {
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view.new_expanded_pos = view.entries.len().saturating_sub(1);
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view.expanded_pos = view.new_expanded_pos + 1;
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}
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let height = 2 * view.entries.len() + 1;
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let mut width = 0;
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let mut strings: Vec<String> = Vec::with_capacity(view.entries.len());
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let mut highlight_reply_subjects: Vec<Option<usize>> =
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Vec::with_capacity(view.entries.len());
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for e in &view.entries {
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let envelope: &Envelope = &mailbox.collection[e.msg_idx];
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let container = &threads.containers()[e.index.1];
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let string = if container.show_subject() {
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let subject = envelope.subject();
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highlight_reply_subjects.push(Some(subject.len()));
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format!(
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" {}{} - {} {}",
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" ".repeat(e.index.0 * 4),
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envelope.date_as_str(),
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envelope.field_from_to_string(),
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envelope.subject(),
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)
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} else {
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highlight_reply_subjects.push(None);
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format!(
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" {}{} - {}",
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" ".repeat(e.index.0 * 4),
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envelope.date_as_str(),
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envelope.field_from_to_string(),
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)
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};
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strings.push(string);
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width = cmp::max(
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width,
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e.index.0 * 4 + strings.last().as_ref().unwrap().len() + 2,
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);
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}
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let mut content = CellBuffer::new(width, height, Cell::default());
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for (y, e) in view.entries.iter().enumerate() {
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/* Box character drawing stuff */
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if y > 0 && content.get_mut(e.index.0 * 4, 2 * y - 1).is_some() {
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let index = (e.index.0 * 4, 2 * y - 1);
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if content[index].ch() == ' ' {
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let mut ctr = 1;
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while content[(e.index.0 * 4 + ctr, 2 * y - 1)].ch() == ' ' {
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set_and_join_box(
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&mut content,
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(e.index.0 * 4 + ctr, 2 * y - 1),
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HORZ_BOUNDARY,
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);
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ctr += 1;
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}
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set_and_join_box(&mut content, index, HORZ_BOUNDARY);
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}
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}
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write_string_to_grid(
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&strings[y],
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&mut content,
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Color::Default,
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Color::Default,
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((e.index.0 * 4 + 1, 2 * y), (width - 1, height - 1)),
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true,
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);
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if let Some(len) = highlight_reply_subjects[y] {
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let index = e.index.0 * 4 + 1 + strings[y].len() - len;
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let area = ((index, 2 * y), (width - 2, 2 * y));
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let fg_color = Color::Byte(33);
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let bg_color = Color::Default;
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change_colors(&mut content, area, fg_color, bg_color);
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}
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set_and_join_box(&mut content, (e.index.0 * 4, 2 * y), VERT_BOUNDARY);
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set_and_join_box(&mut content, (e.index.0 * 4, 2 * y + 1), VERT_BOUNDARY);
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for i in ((e.index.0 * 4) + 1)..width - 1 {
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set_and_join_box(&mut content, (i, 2 * y + 1), HORZ_BOUNDARY);
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}
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set_and_join_box(&mut content, (width - 1, 2 * y + 1), VERT_BOUNDARY);
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}
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for y in 0..height - 1 {
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set_and_join_box(&mut content, (width - 1, y), VERT_BOUNDARY);
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}
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view.content = content;
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view.new_cursor_pos = view.new_expanded_pos;
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view
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}
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fn make_entry(&mut self, context: &Context, i: (usize, usize, usize)) -> ThreadEntry {
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let (ind, idx, order) = i;
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let mailbox = &context.accounts[self.coordinates.0][self.coordinates.1]
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.as_ref()
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.unwrap();
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let container = &mailbox.threads.containers()[idx];
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let msg_idx = if let Some(i) = container.message() {
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i
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} else {
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mailbox.threads.containers()[container.first_child().unwrap()]
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.message()
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.unwrap()
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};
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ThreadEntry {
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index: (ind, idx, order),
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indentation: ind,
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msg_idx,
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}
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}
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fn highlight_line(&self, grid: &mut CellBuffer, area: Area, idx: usize) {
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if idx == self.cursor_pos {
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let fg_color = Color::Default;
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let bg_color = Color::Byte(246);
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change_colors(grid, area, fg_color, bg_color);
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return;
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}
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let (width, height) = self.content.size();
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copy_area(
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grid,
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&self.content,
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area,
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(
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(self.entries[idx].index.0 * 4 + 1, 2 * idx),
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(width - 1, height - 1),
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),
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);
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}
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/// Draw the list
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fn draw_list(&mut self, grid: &mut CellBuffer, area: Area, context: &mut Context) {
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let upper_left = upper_left!(area);
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let bottom_right = bottom_right!(area);
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let (width, height) = self.content.size();
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if height == 0 {
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clear_area(grid, area);
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context.dirty_areas.push_back(area);
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return;
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}
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let rows = (get_y(bottom_right) - get_y(upper_left) + 1) / 2;
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let prev_page_no = (self.cursor_pos).wrapping_div(rows);
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let page_no = (self.new_cursor_pos).wrapping_div(rows);
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let top_idx = page_no * rows;
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/* This closure (written for code clarity, should be inlined by the compiler) returns the
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* **line** of an entry in the grid. */
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let entries = &self.entries;
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let get_entry_area = |idx: usize| {
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(
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(
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entries[idx].index.0 * 4 + 1 + get_x(upper_left),
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get_y(upper_left) + 2 * (idx % rows),
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),
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(
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cmp::min(get_x(upper_left) + width - 2, get_x(bottom_right)),
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get_y(upper_left) + 2 * (idx % rows),
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),
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)
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};
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/* If cursor position has changed, remove the highlight from the previous position and
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* apply it in the new one. */
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if prev_page_no == page_no {
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let old_cursor_pos = self.cursor_pos;
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self.cursor_pos = self.new_cursor_pos;
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for &idx in &[old_cursor_pos, self.new_cursor_pos] {
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if idx >= self.entries.len() {
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continue;
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}
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let new_area = get_entry_area(idx);
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self.highlight_line(grid, new_area, idx);
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context.dirty_areas.push_back(new_area);
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}
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return;
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}
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self.cursor_pos = self.new_cursor_pos;
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/* Page_no has changed, so draw new page */
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copy_area(
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grid,
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&self.content,
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area,
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((0, 2 * top_idx), (width - 1, height - 1)),
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);
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self.highlight_line(grid, get_entry_area(self.cursor_pos), self.cursor_pos);
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context.dirty_areas.push_back(area);
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}
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fn draw_vert(&mut self, grid: &mut CellBuffer, area: Area, context: &mut Context) {
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let upper_left = upper_left!(area);
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let bottom_right = bottom_right!(area);
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let mid = get_x(upper_left) + self.content.size().0;
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if !self.dirty {
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let upper_left = (mid + 1, get_y(upper_left) + 1);
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if self.show_mailview {
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self.mailview
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.draw(grid, (upper_left, bottom_right), context);
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}
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return;
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}
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self.dirty = false;
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/* First draw the thread subject on the first row */
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let y = {
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let mailbox = &mut context.accounts[self.coordinates.0][self.coordinates.1]
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.as_ref()
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.unwrap();
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let threads = &mailbox.threads;
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let container = &threads.containers()[threads.root_set()[self.coordinates.2]];
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let i = if let Some(i) = container.message() {
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i
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} else {
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threads.containers()[container.first_child().unwrap()]
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.message()
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.unwrap()
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};
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let envelope: &Envelope = &mailbox.collection[i];
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let (x, y) = write_string_to_grid(
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&envelope.subject(),
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grid,
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Color::Byte(33),
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Color::Default,
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area,
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true,
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);
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for x in x..=get_x(bottom_right) {
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grid[(x, y)].set_ch(' ');
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grid[(x, y)].set_bg(Color::Default);
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grid[(x, y)].set_fg(Color::Default);
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}
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//context.dirty_areas.push_back(((0,0), set_y(bottom_right, y)));
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y + 2
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};
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let (width, height) = self.content.size();
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if height == 0 || height == self.cursor_pos || width == 0 {
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return;
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}
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/* if this is the first ever draw, there is nothing on the grid to update so populate it
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* first */
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if !self.initiated {
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clear_area(grid, (set_y(upper_left, y - 1), bottom_right));
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let (width, height) = self.content.size();
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if self.show_mailview {
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let area = (set_y(upper_left, y), set_x(bottom_right, mid - 1));
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let upper_left = upper_left!(area);
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let bottom_right = bottom_right!(area);
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let rows = (get_y(bottom_right) - get_y(upper_left) + 1) / 2;
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let page_no = (self.new_cursor_pos).wrapping_div(rows);
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let top_idx = page_no * rows;
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copy_area(
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grid,
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&self.content,
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area,
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((0, 2 * top_idx), (width - 1, height - 1)),
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);
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for y in get_y(upper_left)..=get_y(bottom_right) {
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set_and_join_box(grid, (mid, y), VERT_BOUNDARY);
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}
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} else {
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let area = (set_y(upper_left, y), bottom_right);
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let upper_left = upper_left!(area);
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let bottom_right = bottom_right!(area);
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let rows = (get_y(bottom_right) - get_y(upper_left) + 1) / 2;
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let page_no = (self.new_cursor_pos).wrapping_div(rows);
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let top_idx = page_no * rows;
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copy_area(
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grid,
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&self.content,
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area,
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((0, 2 * top_idx), (width - 1, height - 1)),
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);
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}
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context.dirty_areas.push_back(area);
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self.initiated = true;
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}
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if self.show_mailview {
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self.draw_list(
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grid,
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(set_y(upper_left, y), set_x(bottom_right, mid - 1)),
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context,
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);
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let upper_left = (mid + 1, get_y(upper_left) + 1);
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self.mailview
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.draw(grid, (upper_left, bottom_right), context);
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} else {
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self.draw_list(grid, (set_y(upper_left, y), bottom_right), context);
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}
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}
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fn draw_horz(&mut self, grid: &mut CellBuffer, area: Area, context: &mut Context) {
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let upper_left = upper_left!(area);
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let bottom_right = bottom_right!(area);
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let total_rows = height!(area);
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let pager_ratio = context.runtime_settings.pager.pager_ratio;
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let bottom_entity_rows = (pager_ratio * total_rows) / 100;
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if bottom_entity_rows > total_rows {
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clear_area(grid, area);
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context.dirty_areas.push_back(area);
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return;
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}
|
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let mid = get_y(upper_left) + total_rows - bottom_entity_rows;
|
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if !self.dirty {
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if self.show_mailview {
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self.mailview
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.draw(grid, (set_y(upper_left, mid + 1), bottom_right), context);
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}
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return;
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}
|
|
|
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self.dirty = false;
|
|
|
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/* First draw the thread subject on the first row */
|
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let y = {
|
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let mailbox = &mut context.accounts[self.coordinates.0][self.coordinates.1]
|
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.as_ref()
|
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.unwrap();
|
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let threads = &mailbox.threads;
|
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let container = &threads.containers()[threads.root_set()[self.coordinates.2]];
|
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let i = if let Some(i) = container.message() {
|
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i
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} else {
|
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threads.containers()[container.first_child().unwrap()]
|
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.message()
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.unwrap()
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};
|
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let envelope: &Envelope = &mailbox.collection[i];
|
|
|
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let (x, y) = write_string_to_grid(
|
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&envelope.subject(),
|
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grid,
|
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Color::Byte(33),
|
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Color::Default,
|
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area,
|
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true,
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);
|
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for x in x..=get_x(bottom_right) {
|
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grid[(x, y)].set_ch(' ');
|
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grid[(x, y)].set_bg(Color::Default);
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grid[(x, y)].set_fg(Color::Default);
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}
|
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//context.dirty_areas.push_back(((0,0), set_y(bottom_right, y)));
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y + 2
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};
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let (width, height) = self.content.size();
|
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if height == 0 || height == self.cursor_pos || width == 0 {
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return;
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}
|
|
|
|
/* if this is the first ever draw, there is nothing on the grid to update so populate it
|
|
* first */
|
|
if !self.initiated {
|
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clear_area(grid, (set_y(upper_left, y - 1), bottom_right));
|
|
let (width, height) = self.content.size();
|
|
|
|
if self.show_mailview {
|
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let area = (set_y(upper_left, y), set_y(bottom_right, mid - 1));
|
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let upper_left = upper_left!(area);
|
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let bottom_right = bottom_right!(area);
|
|
|
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let rows = (get_y(bottom_right) - get_y(upper_left) + 1) / 2;
|
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let page_no = (self.new_cursor_pos).wrapping_div(rows);
|
|
let top_idx = page_no * rows;
|
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|
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copy_area(
|
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grid,
|
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&self.content,
|
|
area,
|
|
((0, 2 * top_idx), (width - 1, height - 1)),
|
|
);
|
|
for x in get_x(upper_left)..=get_x(bottom_right) {
|
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set_and_join_box(grid, (x, mid), HORZ_BOUNDARY);
|
|
}
|
|
} else {
|
|
let area = (set_y(upper_left, y), bottom_right);
|
|
let upper_left = upper_left!(area);
|
|
let bottom_right = bottom_right!(area);
|
|
|
|
let rows = (get_y(bottom_right) - get_y(upper_left) + 1) / 2;
|
|
let page_no = (self.new_cursor_pos).wrapping_div(rows);
|
|
let top_idx = page_no * rows;
|
|
copy_area(
|
|
grid,
|
|
&self.content,
|
|
area,
|
|
((0, 2 * top_idx), (width - 1, height - 1)),
|
|
);
|
|
}
|
|
context.dirty_areas.push_back(area);
|
|
self.initiated = true;
|
|
}
|
|
if self.show_mailview {
|
|
self.draw_list(
|
|
grid,
|
|
(set_y(upper_left, y), set_y(bottom_right, mid - 1)),
|
|
context,
|
|
);
|
|
self.mailview
|
|
.draw(grid, (set_y(upper_left, mid + 1), bottom_right), context);
|
|
} else {
|
|
self.draw_list(grid, (set_y(upper_left, y), bottom_right), context);
|
|
}
|
|
}
|
|
}
|
|
|
|
impl fmt::Display for ThreadView {
|
|
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
|
|
// TODO display subject/info
|
|
write!(f, "view thread")
|
|
}
|
|
}
|
|
|
|
impl Component for ThreadView {
|
|
fn draw(&mut self, grid: &mut CellBuffer, area: Area, context: &mut Context) {
|
|
let total_rows = height!(area);
|
|
let total_cols = width!(area);
|
|
if total_rows < 24 || total_cols < 80 {
|
|
return;
|
|
}
|
|
|
|
/* If user has selected another mail to view, change to it */
|
|
if self.new_expanded_pos != self.expanded_pos {
|
|
self.expanded_pos = self.new_expanded_pos;
|
|
self.mailview = MailView::new(
|
|
(
|
|
self.coordinates.0,
|
|
self.coordinates.1,
|
|
self.entries[self.expanded_pos].msg_idx,
|
|
),
|
|
None,
|
|
None,
|
|
);
|
|
}
|
|
|
|
if total_cols >= self.content.size().0 + 74 {
|
|
self.draw_vert(grid, area, context);
|
|
} else {
|
|
self.draw_horz(grid, area, context);
|
|
}
|
|
}
|
|
fn process_event(&mut self, event: &UIEvent, context: &mut Context) -> bool {
|
|
if self.mailview.process_event(event, context) {
|
|
return true;
|
|
}
|
|
match event.event_type {
|
|
UIEventType::Input(Key::Char('R')) => {
|
|
context.replies.push_back(UIEvent {
|
|
id: 0,
|
|
event_type: UIEventType::Action(Tab(Reply(
|
|
self.coordinates,
|
|
self.entries[self.expanded_pos].index.1,
|
|
))),
|
|
});
|
|
return true;
|
|
}
|
|
UIEventType::Input(Key::Up) => {
|
|
if self.cursor_pos > 0 {
|
|
self.new_cursor_pos = self.new_cursor_pos.saturating_sub(1);
|
|
self.dirty = true;
|
|
}
|
|
return true;
|
|
}
|
|
UIEventType::Input(Key::Down) => {
|
|
let height = self.entries.len();
|
|
if height > 0 && self.cursor_pos + 1 < height {
|
|
self.new_cursor_pos += 1;
|
|
self.dirty = true;
|
|
}
|
|
return true;
|
|
}
|
|
UIEventType::Input(Key::Char('\n')) => {
|
|
self.new_expanded_pos = self.cursor_pos;
|
|
self.show_mailview = true;
|
|
self.initiated = false;
|
|
self.set_dirty();
|
|
return true;
|
|
}
|
|
UIEventType::Input(Key::Char('p')) => {
|
|
self.show_mailview = !self.show_mailview;
|
|
self.initiated = false;
|
|
self.set_dirty();
|
|
return true;
|
|
}
|
|
UIEventType::Resize => {
|
|
self.set_dirty();
|
|
}
|
|
_ => {}
|
|
}
|
|
false
|
|
}
|
|
fn is_dirty(&self) -> bool {
|
|
self.dirty || self.mailview.is_dirty()
|
|
}
|
|
fn set_dirty(&mut self) {
|
|
self.initiated = false;
|
|
self.dirty = true;
|
|
self.mailview.set_dirty();
|
|
}
|
|
}
|