435 lines
14 KiB
Rust
435 lines
14 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)]
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struct ThreadEntry {
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index: (usize, usize, usize),
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indentation: usize,
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content: CellBuffer,
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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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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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pub fn new(coordinates: (usize, usize, usize), context: &Context) -> Self {
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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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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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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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view.new_expanded_pos = view.entries.len() - 1;
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view.expanded_pos = view.new_expanded_pos + 1;
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let height = 2 * view.entries.len();
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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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for e in &view.entries {
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let envelope: &Envelope = &mailbox.collection[e.msg_idx];
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strings.push(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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width = cmp::max(
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width,
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e.index.0 + strings.last().as_ref().unwrap().len() + 1,
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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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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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content[(e.index.0 * 4 + ctr, 2 * y - 1)].set_ch(HORZ_BOUNDARY);
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ctr += 1;
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}
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content[index].set_ch(_TOP_LEFT_CORNER);
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} else {
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content[index].set_ch(LIGHT_DOWN_AND_HORIZONTAL);
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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 + 1, 2 * y), (width - 1, height - 1)),
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true,
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);
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content[(e.index.0 * 4, 2 * y)].set_ch(VERT_BOUNDARY);
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for i in (e.index.0 * 4)..width {
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content[(i, 2 * y + 1)].set_ch(HORZ_BOUNDARY);
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}
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content[(e.index.0 * 4, 2 * y + 1)].set_ch(LIGHT_UP_AND_HORIZONTAL);
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}
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//view.mailview = MailView::new((view.coordinates.0, view.coordinates.1, view.entries[view.expanded_pos].msg_idx), None, None);
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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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let envelope: &Envelope = &mailbox.collection[msg_idx];
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let op = context.accounts[self.coordinates.0]
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.backend
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.operation(envelope.hash());
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let body = envelope.body(op);
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let mut body_text: String = " \n".repeat(6);
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body_text.push_str(&String::from_utf8_lossy(&decode_rec(&body, None)));
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let mut buf = CellBuffer::from(body_text.as_str()).split_newlines();
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let date = format!("Date: {}\n", envelope.date_as_str());
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let from = format!("From: {}\n", envelope.field_from_to_string());
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let message_id = &format!("Message-ID: <{}>\n\n", envelope.message_id_raw());
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let mut width = [date.len(), from.len(), message_id.len(), buf.size().0]
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.iter()
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.cloned()
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.max()
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.unwrap_or(1);
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let height = buf.size().1;
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if width > buf.size().0 {
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buf.resize(width, height, Cell::default());
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width -= 1;
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} else {
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width = buf.size().0 - 1;
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}
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write_string_to_grid(
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&date,
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&mut buf,
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Color::Byte(33),
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Color::Default,
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((ind, 0), (width, height)),
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true,
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);
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write_string_to_grid(
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&from,
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&mut buf,
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Color::Byte(33),
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Color::Default,
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((ind, 1), (width, height)),
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true,
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);
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write_string_to_grid(
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&message_id,
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&mut buf,
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Color::Byte(33),
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Color::Default,
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((ind, 2), (width, height)),
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true,
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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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content: buf,
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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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let fg_color = Color::Default;
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let bg_color = if self.cursor_pos == idx {
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Color::Byte(246)
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} else {
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Color::Default
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};
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change_colors(grid, area, fg_color, bg_color);
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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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copy_area(grid, &self.content, area, ((0, 0), (width - 1, 0)));
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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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/* 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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let new_area = (
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set_y(upper_left, get_y(upper_left) + 2 * (idx % rows)),
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set_y(bottom_right, get_y(upper_left) + 2 * (idx % rows)),
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);
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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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} else if self.cursor_pos != self.new_cursor_pos {
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self.cursor_pos = self.new_cursor_pos;
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}
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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(
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grid,
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(
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set_y(upper_left, get_y(upper_left) + 2 * (self.cursor_pos % rows)),
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set_y(
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bottom_right,
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get_y(upper_left) + 2 * (self.cursor_pos % rows),
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),
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),
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self.cursor_pos,
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);
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context.dirty_areas.push_back(area);
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}
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}
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impl fmt::Display for ThreadView {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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// TODO display subject/info
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write!(f, "view thread")
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}
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}
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impl Component for ThreadView {
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fn draw(&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 = get_y(bottom_right) - get_y(upper_left);
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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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self.mailview
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.draw(grid, (set_y(upper_left, mid + 1), bottom_right), context);
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return;
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}
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self.dirty = false;
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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 !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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copy_area(
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grid,
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&self.content,
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(set_y(upper_left, y), set_y(bottom_right, mid - 1)),
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((0, 0), (width - 1, height - 1)),
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);
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for x in get_x(upper_left)..=get_x(bottom_right) {
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grid[(x, mid)].set_ch(HORZ_BOUNDARY);
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}
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if let Some(cell) = grid.get_mut(get_x(upper_left).saturating_sub(1), mid) {
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if cell.ch() == VERT_BOUNDARY {
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cell.set_ch(LIGHT_VERTICAL_AND_RIGHT);
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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.new_expanded_pos != self.expanded_pos {
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self.expanded_pos = self.new_expanded_pos;
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self.mailview = MailView::new(
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(
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self.coordinates.0,
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self.coordinates.1,
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self.entries[self.expanded_pos].msg_idx,
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),
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None,
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None,
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);
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}
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self.draw_list(
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grid,
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(set_y(upper_left, y), set_y(bottom_right, mid - 1)),
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context,
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);
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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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fn process_event(&mut self, event: &UIEvent, context: &mut Context) -> bool {
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if self.mailview.process_event(event, context) {
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return true;
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}
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match event.event_type {
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UIEventType::Input(Key::Up) => {
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if self.cursor_pos > 0 {
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self.new_cursor_pos -= 1;
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self.dirty = true;
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}
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return true;
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}
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UIEventType::Input(Key::Down) => {
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let height = self.entries.len();
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if height > 0 && self.cursor_pos + 1 < height {
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self.new_cursor_pos += 1;
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self.dirty = true;
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}
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return true;
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}
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UIEventType::Input(Key::Char('\n')) => {
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self.new_expanded_pos = self.cursor_pos;
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self.dirty = true;
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return true;
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}
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UIEventType::Resize => {
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self.dirty = true;
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}
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_ => {}
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}
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false
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}
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fn is_dirty(&self) -> bool {
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self.dirty || self.mailview.is_dirty()
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}
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fn set_dirty(&mut self) {
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self.dirty = true;
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self.mailview.set_dirty();
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}
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}
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