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/*
* meli
*
* Copyright 2017-2018 Manos Pitsidianakis
*
* This file is part of meli.
*
* meli is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* meli is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with meli. If not, see <http://www.gnu.org/licenses/>.
*/
use super::*;
use crate::components::utilities::PageMovement;
use std::cmp;
const INDENTATION_COLORS: &'static [u8] = &[
69, // CornflowerBlue
196, // Red1
175, // Pink3
220, // Gold1
172, // Orange3
072, // CadetBlue
];
#[derive(Debug, Clone)]
struct ThreadEntry {
index: (usize, ThreadNodeHash, usize),
/// (indentation, thread_node index, line number in listing)
indentation: usize,
msg_hash: EnvelopeHash,
seen: bool,
dirty: bool,
hidden: bool,
heading: String,
}
#[derive(Debug, Default, Clone)]
pub struct ThreadView {
new_cursor_pos: usize,
cursor_pos: usize,
expanded_pos: usize,
new_expanded_pos: usize,
reversed: bool,
coordinates: (usize, usize, usize),
thread_group: ThreadHash,
mailview: MailView,
show_mailview: bool,
show_thread: bool,
entries: Vec<ThreadEntry>,
visible_entries: Vec<Vec<usize>>,
movement: Option<PageMovement>,
dirty: bool,
content: CellBuffer,
initiated: bool,
id: ComponentId,
}
impl ThreadView {
const DESCRIPTION: &'static str = "thread view";
/*
* coordinates: (account index, mailbox index, root set thread_node index)
* expanded_hash: optional position of expanded entry when we render the threadview. Default
* expanded message is the last one.
* context: current context
*/
pub fn new(
coordinates: (usize, usize, usize),
thread_group: ThreadHash,
expanded_hash: Option<ThreadNodeHash>,
context: &Context,
) -> Self {
let mut view = ThreadView {
reversed: false,
initiated: false,
coordinates,
thread_group,
mailview: MailView::default(),
show_mailview: true,
show_thread: true,
entries: Vec::new(),
cursor_pos: 1,
new_cursor_pos: 0,
dirty: true,
id: ComponentId::new_v4(),
..Default::default()
};
view.initiate(expanded_hash, context);
view.new_cursor_pos = view.new_expanded_pos;
view
}
pub fn update(&mut self, context: &Context) {
if self.entries.is_empty() {
return;
}
let old_entries = self.entries.clone();
let old_focused_entry = if self.entries.len() > self.cursor_pos {
Some(self.entries.remove(self.cursor_pos))
} else {
None
};
let old_expanded_entry = if self.entries.len() > self.expanded_pos {
Some(self.entries.remove(self.expanded_pos))
} else {
None
};
let expanded_hash = old_expanded_entry.as_ref().map(|e| e.index.1);
self.initiate(expanded_hash, context);
let mut old_cursor = 0;
let mut new_cursor = 0;
loop {
if old_cursor >= old_entries.len() || new_cursor >= self.entries.len() {
break;
}
if old_entries[old_cursor].msg_hash == self.entries[new_cursor].msg_hash
|| old_entries[old_cursor].index == self.entries[new_cursor].index
|| old_entries[old_cursor].heading == self.entries[new_cursor].heading
{
self.entries[new_cursor].hidden = old_entries[old_cursor].hidden;
old_cursor += 1;
new_cursor += 1;
} else {
new_cursor += 1;
}
self.recalc_visible_entries();
}
if let Some(old_focused_entry) = old_focused_entry {
if let Some(new_entry_idx) = self.entries.iter().position(|e| {
e.msg_hash == old_focused_entry.msg_hash
|| (e.index.1 == old_focused_entry.index.1
&& e.index.2 == old_focused_entry.index.2)
}) {
self.cursor_pos = new_entry_idx;
}
}
if let Some(old_expanded_entry) = old_expanded_entry {
if let Some(new_entry_idx) = self.entries.iter().position(|e| {
e.msg_hash == old_expanded_entry.msg_hash
|| (e.index.1 == old_expanded_entry.index.1
&& e.index.2 == old_expanded_entry.index.2)
}) {
self.expanded_pos = new_entry_idx;
}
}
self.set_dirty(true);
}
fn initiate(&mut self, expanded_hash: Option<ThreadNodeHash>, context: &Context) {
/* stack to push thread messages in order in order to pop and print them later */
let account = &context.accounts[self.coordinates.0];
let mailbox = &account[self.coordinates.1].unwrap();
let threads = &account.collection.threads[&mailbox.folder.hash()];
let thread_iter = threads.thread_group_iter(self.thread_group);
self.entries.clear();
for (line, (ind, thread_node_hash)) in thread_iter.enumerate() {
let entry = if let Some(msg_hash) = threads.thread_nodes()[&thread_node_hash].message()
{
let seen: bool = account.collection.get_env(msg_hash).is_seen();
self.make_entry((ind, thread_node_hash, line), msg_hash, seen)
} else {
continue;
};
self.entries.push(entry);
match expanded_hash {
Some(expanded_hash) if expanded_hash == thread_node_hash => {
self.new_expanded_pos = self.entries.len().saturating_sub(1);
self.expanded_pos = self.new_expanded_pos + 1;
}
_ => {}
}
}
if expanded_hash.is_none() {
self.new_expanded_pos = self.entries.len().saturating_sub(1);
self.expanded_pos = self.new_expanded_pos + 1;
}
let height = 2 * self.entries.len() + 1;
let mut width = 0;
let mut highlight_reply_subjects: Vec<Option<usize>> =
Vec::with_capacity(self.entries.len());
for e in &mut self.entries {
let envelope: EnvelopeRef = context.accounts[self.coordinates.0]
.collection
.get_env(e.msg_hash);
let thread_node = &threads.thread_nodes()[&e.index.1];
let string = if thread_node.show_subject() {
let subject = envelope.subject();
highlight_reply_subjects.push(Some(subject.grapheme_width()));
format!(
" {} - {} {}{}",
envelope.date_as_str(),
envelope.field_from_to_string(),
envelope.subject(),
if envelope.has_attachments() {
" 📎"
} else {
""
},
)
} else {
highlight_reply_subjects.push(None);
format!(
" {} - {}{}",
envelope.date_as_str(),
envelope.field_from_to_string(),
if envelope.has_attachments() {
" 📎"
} else {
""
},
)
};
e.heading = string;
width = cmp::max(width, e.index.0 * 4 + e.heading.grapheme_width() + 2);
}
let mut content = CellBuffer::new_with_context(width, height, Cell::default(), context);
if self.reversed {
for (y, e) in self.entries.iter().rev().enumerate() {
/* Box character drawing stuff */
if y > 0 && content.get_mut(e.index.0 * 4, 2 * y - 1).is_some() {
let index = (e.index.0 * 4, 2 * y - 1);
if content[index].ch() == ' ' {
let mut ctr = 1;
while content.get(e.index.0 * 4 + ctr, 2 * y - 1).is_some() {
if content[(e.index.0 * 4 + ctr, 2 * y - 1)].ch() != ' ' {
break;
}
set_and_join_box(
&mut content,
(e.index.0 * 4 + ctr, 2 * y - 1),
BoxBoundary::Horizontal,
);
ctr += 1;
}
set_and_join_box(&mut content, index, BoxBoundary::Horizontal);
}
}
write_string_to_grid(
&e.heading,
&mut content,
if e.seen {
Color::Default
} else {
Color::Byte(0)
},
if e.seen {
Color::Default
} else {
Color::Byte(251)
},
Attr::Default,
(
(e.index.0 * 4 + 1, 2 * y),
(e.index.0 * 4 + e.heading.grapheme_width() + 1, height - 1),
),
None,
);
{
let envelope: EnvelopeRef = context.accounts[self.coordinates.0]
.collection
.get_env(e.msg_hash);
if envelope.has_attachments() {
content[(e.index.0 * 4 + e.heading.grapheme_width(), 2 * y)]
.set_fg(Color::Byte(103));
}
}
if let Some(len) = highlight_reply_subjects[y] {
let index = e.index.0 * 4 + 1 + e.heading.grapheme_width() - len;
let area = ((index, 2 * y), (width - 2, 2 * y));
let fg_color = Color::Byte(33);
let bg_color = Color::Default;
change_colors(&mut content, area, fg_color, bg_color);
}
set_and_join_box(&mut content, (e.index.0 * 4, 2 * y), BoxBoundary::Vertical);
set_and_join_box(
&mut content,
(e.index.0 * 4, 2 * y + 1),
BoxBoundary::Vertical,
);
for i in ((e.index.0 * 4) + 1)..width - 1 {
set_and_join_box(&mut content, (i, 2 * y + 1), BoxBoundary::Horizontal);
}
set_and_join_box(&mut content, (width - 1, 2 * y), BoxBoundary::Vertical);
set_and_join_box(&mut content, (width - 1, 2 * y + 1), BoxBoundary::Vertical);
}
} else {
for (y, e) in self.entries.iter().enumerate() {
/* Box character drawing stuff */
let mut x = 0;
for i in 0..e.index.0 {
let color = INDENTATION_COLORS[(i).wrapping_rem(INDENTATION_COLORS.len())];
change_colors(
&mut content,
((x, 2 * y), (x + 3, 2 * y + 1)),
Color::Default,
Color::Byte(color),
);
x += 4;
}
if y > 0 && content.get_mut(e.index.0 * 4, 2 * y - 1).is_some() {
let index = (e.index.0 * 4, 2 * y - 1);
if content[index].ch() == ' ' {
let mut ctr = 1;
content[(e.index.0 * 4, 2 * y - 1)].set_bg(Color::Default);
while content.get(e.index.0 * 4 + ctr, 2 * y - 1).is_some() {
content[(e.index.0 * 4 + ctr, 2 * y - 1)].set_bg(Color::Default);
if content[(e.index.0 * 4 + ctr, 2 * y - 1)].ch() != ' ' {
break;
}
set_and_join_box(
&mut content,
(e.index.0 * 4 + ctr, 2 * y - 1),
BoxBoundary::Horizontal,
);
ctr += 1;
}
set_and_join_box(&mut content, index, BoxBoundary::Horizontal);
}
}
write_string_to_grid(
&e.heading,
&mut content,
if e.seen {
Color::Default
} else {
Color::Byte(0)
},
if e.seen {
Color::Default
} else {
Color::Byte(251)
},
Attr::Default,
(
(e.index.0 * 4 + 1, 2 * y),
(e.index.0 * 4 + e.heading.grapheme_width() + 1, height - 1),
),
None,
);
{
let envelope: EnvelopeRef = context.accounts[self.coordinates.0]
.collection
.get_env(e.msg_hash);
if envelope.has_attachments() {
content[(e.index.0 * 4 + e.heading.grapheme_width(), 2 * y)]
.set_fg(Color::Byte(103));
}
}
if let Some(_len) = highlight_reply_subjects[y] {
let index = e.index.0 * 4 + 1;
let area = ((index, 2 * y), (width - 2, 2 * y));
let fg_color = Color::Byte(33);
let bg_color = Color::Default;
change_colors(&mut content, area, fg_color, bg_color);
}
set_and_join_box(&mut content, (e.index.0 * 4, 2 * y), BoxBoundary::Vertical);
set_and_join_box(
&mut content,
(e.index.0 * 4, 2 * y + 1),
BoxBoundary::Vertical,
);
for i in ((e.index.0 * 4) + 1)..width - 1 {
set_and_join_box(&mut content, (i, 2 * y + 1), BoxBoundary::Horizontal);
}
set_and_join_box(&mut content, (width - 1, 2 * y), BoxBoundary::Vertical);
set_and_join_box(&mut content, (width - 1, 2 * y + 1), BoxBoundary::Vertical);
}
for y in 0..height - 1 {
set_and_join_box(&mut content, (width - 1, y), BoxBoundary::Vertical);
}
}
self.content = content;
self.visible_entries = vec![(0..self.entries.len()).collect()];
}
fn make_entry(
&mut self,
i: (usize, ThreadNodeHash, usize),
msg_hash: EnvelopeHash,
seen: bool,
) -> ThreadEntry {
let (ind, _, _) = i;
ThreadEntry {
index: i,
indentation: ind,
msg_hash,
seen,
dirty: true,
hidden: false,
heading: String::new(),
}
}
fn highlight_line(&self, grid: &mut CellBuffer, dest_area: Area, src_area: Area, idx: usize) {
let visibles: Vec<&usize> = self
.visible_entries
.iter()
.flat_map(|ref v| v.iter())
.collect();
if idx == *visibles[self.cursor_pos] {
let fg_color = Color::Default;
let bg_color = Color::Byte(246);
change_colors(grid, dest_area, fg_color, bg_color);
return;
}
copy_area(grid, &self.content, dest_area, src_area);
}
/// draw the list
fn draw_list(&mut self, grid: &mut CellBuffer, area: Area, context: &mut Context) {
/* Make space on the left for the scrollbar */
let mut upper_left = pos_inc(upper_left!(area), (1, 0));
let bottom_right = bottom_right!(area);
let (width, height) = self.content.size();
if height == 0 {
context.dirty_areas.push_back(area);
return;
}
let rows = (get_y(bottom_right) - get_y(upper_left)).wrapping_div(2);
if rows == 0 {
context.dirty_areas.push_back(area);
return;
}
if let Some(mvm) = self.movement.take() {
match mvm {
PageMovement::Up(amount) => {
self.new_cursor_pos = self.new_cursor_pos.saturating_sub(amount);
}
PageMovement::PageUp(multiplier) => {
self.new_cursor_pos = self.new_cursor_pos.saturating_sub(rows * multiplier);
}
PageMovement::Down(amount) => {
if self.new_cursor_pos + amount + 1 < height {
self.new_cursor_pos += amount;
} else if self.new_cursor_pos + amount > height {
self.new_cursor_pos = height - 1;
} else {
self.new_cursor_pos = (height / rows) * rows;
}
}
PageMovement::PageDown(multiplier) => {
if self.new_cursor_pos + rows * multiplier + 1 < height {
self.new_cursor_pos += rows * multiplier;
} else {
self.new_cursor_pos = (height / rows) * rows;
}
}
PageMovement::Right(_) | PageMovement::Left(_) => {}
PageMovement::Home => {
self.new_cursor_pos = 0;
}
PageMovement::End => {
self.new_cursor_pos = (height / rows) * rows;
}
}
}
if self.new_cursor_pos >= self.entries.len() {
self.new_cursor_pos = self.entries.len().saturating_sub(1);
}
let prev_page_no = (self.cursor_pos).wrapping_div(rows);
let page_no = (self.new_cursor_pos).wrapping_div(rows);
let top_idx = page_no * rows;
/* This closure (written for code clarity, should be inlined by the compiler) returns the
* **line** of an entry in the ThreadView grid. */
let get_entry_area = |idx: usize, entries: &[ThreadEntry]| {
let entries = &entries;
let visual_indentation = entries[idx].index.0 * 4;
(
(visual_indentation, 2 * idx),
(
visual_indentation + entries[idx].heading.grapheme_width() + 1,
2 * idx,
),
)
};
if self.dirty || (page_no != prev_page_no) {
if page_no != prev_page_no {
clear_area(grid, area);
}
let visibles: Vec<&usize> = self
.visible_entries
.iter()
.flat_map(|ref v| v.iter())
.collect();
if rows >= visibles.len() {
upper_left = pos_dec(upper_left!(area), (1, 0));
}
for (visible_entry_counter, v) in visibles.iter().skip(top_idx).take(rows).enumerate() {
if visible_entry_counter >= rows {
break;
}
let idx = *v;
copy_area(
grid,
&self.content,
(
pos_inc(upper_left, (0, 2 * visible_entry_counter)), // dest_area
bottom_right,
),
(
(0, 2 * idx), //src_area
(width - 1, 2 * idx + 1),
),
);
}
/* If cursor position has changed, remove the highlight from the previous position and
* apply it in the new one. */
self.cursor_pos = self.new_cursor_pos;
if self.cursor_pos + 1 > visibles.len() {
self.cursor_pos = visibles.len().saturating_sub(1);
}
let idx = *visibles[self.cursor_pos];
let src_area = { get_entry_area(idx, &self.entries) };
let visual_indentation = self.entries[idx].indentation * 4;
let dest_area = (
pos_inc(
upper_left,
(visual_indentation, 2 * (self.cursor_pos - top_idx)),
),
(
cmp::min(
get_x(bottom_right),
get_x(upper_left)
+ visual_indentation
+ self.entries[idx].heading.grapheme_width()
+ 1,
),
cmp::min(
get_y(bottom_right),
get_y(upper_left) + 2 * (self.cursor_pos - top_idx),
),
),
);
self.highlight_line(grid, dest_area, src_area, idx);
if rows < visibles.len() {
ScrollBar::draw(
ScrollBar::default(),
grid,
(
upper_left!(area),
set_x(bottom_right, get_x(upper_left!(area)) + 1),
),
self.cursor_pos,
rows,
visibles.len(),
);
}
self.dirty = false;
context.dirty_areas.push_back(area);
} else {
let old_cursor_pos = self.cursor_pos;
self.cursor_pos = self.new_cursor_pos;
/* If cursor position has changed, remove the highlight from the previous position and
* apply it in the new one. */
let visibles: Vec<&usize> = self
.visible_entries
.iter()
.flat_map(|ref v| v.iter())
.collect();
if rows >= visibles.len() {
upper_left = pos_dec(upper_left!(area), (1, 0));
}
for &idx in &[old_cursor_pos, self.cursor_pos] {
let entry_idx = *visibles[idx];
let src_area = { get_entry_area(entry_idx, &self.entries) };
let visual_indentation = self.entries[entry_idx].indentation * 4;
let dest_area = (
pos_inc(
upper_left,
(visual_indentation, 2 * (visibles[..idx].len() - top_idx)),
),
(
cmp::min(
get_x(bottom_right),
get_x(upper_left)
+ visual_indentation
+ self.entries[entry_idx].heading.grapheme_width()
+ 1,
),
cmp::min(
get_y(bottom_right),
get_y(upper_left) + 2 * (visibles[..idx].len() - top_idx),
),
),
);
self.highlight_line(grid, dest_area, src_area, entry_idx);
if rows < visibles.len() {
ScrollBar::draw(
ScrollBar::default(),
grid,
(
upper_left!(area),
set_x(bottom_right, get_x(upper_left!(area)) + 1),
),
self.cursor_pos,
rows,
visibles.len(),
);
context.dirty_areas.push_back((
upper_left!(area),
set_x(bottom_right, get_x(upper_left!(area)) + 1),
));
}
let (upper_left, bottom_right) = dest_area;
context
.dirty_areas
.push_back((upper_left, (get_x(bottom_right), get_y(upper_left) + 1)));
}
}
}
fn draw_vert(&mut self, grid: &mut CellBuffer, area: Area, context: &mut Context) {
let upper_left = upper_left!(area);
let bottom_right = bottom_right!(area);
let mid = get_x(upper_left) + self.content.size().0;
/* First draw the thread subject on the first row */
let y = if self.dirty {
let account = &context.accounts[self.coordinates.0];
let mailbox = &account[self.coordinates.1].unwrap();
let threads = &account.collection.threads[&mailbox.folder.hash()];
let thread_root = threads
.thread_group_iter(self.thread_group)
.next()
.unwrap()
.1;
let thread_node = &threads.thread_nodes()[&thread_root];
let i = thread_node.message().unwrap_or_else(|| {
let mut iter_ptr = thread_node.children()[0];
while threads.thread_nodes()[&iter_ptr].message().is_none() {
iter_ptr = threads.thread_nodes()[&iter_ptr].children()[0];
}
threads.thread_nodes()[&iter_ptr].message().unwrap()
});
let envelope: EnvelopeRef = account.collection.get_env(i);
let (x, y) = write_string_to_grid(
&envelope.subject(),
grid,
Color::Byte(33),
Color::Default,
Attr::Default,
area,
Some(get_x(upper_left)),
);
for x in x..=get_x(bottom_right) {
grid[(x, y)].set_ch(' ');
grid[(x, y)].set_bg(Color::Default);
grid[(x, y)].set_fg(Color::Default);
}
context
.dirty_areas
.push_back((upper_left, set_y(bottom_right, y + 1)));
context
.dirty_areas
.push_back(((mid, y + 1), set_x(bottom_right, mid)));
clear_area(grid, ((mid, y + 1), set_x(bottom_right, mid)));
y + 2
} else {
get_y(upper_left) + 2
};
let (width, height) = self.content.size();
if height == 0 || width == 0 {
return;
}
for x in get_x(upper_left)..=get_x(bottom_right) {
set_and_join_box(grid, (x, y - 1), BoxBoundary::Horizontal);
grid[(x, y - 1)].set_fg(Color::Byte(33));
grid[(x, y - 1)].set_bg(Color::Default);
}
match (self.show_mailview, self.show_thread) {
(true, true) => {
self.draw_list(
grid,
(set_y(upper_left, y), set_x(bottom_right, mid - 1)),
context,
);
let upper_left = (mid + 1, get_y(upper_left) + y - 1);
self.mailview
.draw(grid, (upper_left, bottom_right), context);
}
(false, true) => {
clear_area(grid, ((mid + 1, get_y(upper_left) + y - 1), bottom_right));
self.draw_list(grid, (set_y(upper_left, y), bottom_right), context);
}
(_, false) => {
self.mailview.draw(grid, area, context);
}
}
}
fn draw_horz(&mut self, grid: &mut CellBuffer, area: Area, context: &mut Context) {
let upper_left = upper_left!(area);
let bottom_right = bottom_right!(area);
let total_rows = height!(area);
let pager_ratio = context.runtime_settings.pager.pager_ratio;
let bottom_entity_rows = (pager_ratio * total_rows) / 100;
if bottom_entity_rows > total_rows {
clear_area(grid, area);
context.dirty_areas.push_back(area);
return;
}
let mut mid = get_y(upper_left) + total_rows - bottom_entity_rows;
if mid >= get_y(bottom_right) {
mid = get_y(bottom_right) / 2;
}
let mid = mid;
/* First draw the thread subject on the first row */
let y = {
let account = &context.accounts[self.coordinates.0];
let mailbox = &account[self.coordinates.1].unwrap();
let threads = &account.collection.threads[&mailbox.folder.hash()];
let thread_root = threads
.thread_group_iter(self.thread_group)
.next()
.unwrap()
.1;
let thread_node = &threads.thread_nodes()[&thread_root];
let i = thread_node.message().unwrap_or_else(|| {
let mut iter_ptr = thread_node.children()[0];
while threads.thread_nodes()[&iter_ptr].message().is_none() {
iter_ptr = threads.thread_nodes()[&iter_ptr].children()[0];
}
threads.thread_nodes()[&iter_ptr].message().unwrap()
});
let envelope: EnvelopeRef = account.collection.get_env(i);
let (x, y) = write_string_to_grid(
&envelope.subject(),
grid,
Color::Byte(33),
Color::Default,
Attr::Default,
area,
Some(get_x(upper_left)),
);
for x in x..=get_x(bottom_right) {
grid[(x, y)].set_ch(' ');
grid[(x, y)].set_bg(Color::Default);
grid[(x, y)].set_fg(Color::Default);
}
context
.dirty_areas
.push_back((upper_left, set_y(bottom_right, y + 2)));
y + 2
};
for x in get_x(upper_left)..=get_x(bottom_right) {
set_and_join_box(grid, (x, y - 1), BoxBoundary::Horizontal);
grid[(x, y - 1)].set_fg(Color::Default);
grid[(x, y - 1)].set_bg(Color::Default);
}
let (width, height) = self.content.size();
if height == 0 || height == self.cursor_pos || width == 0 {
return;
}
/* if this is the first ever draw, there is nothing on the grid to update so populate it
* first */
if !self.initiated {
clear_area(grid, (set_y(upper_left, y), bottom_right));
let (width, height) = self.content.size();
match (self.show_mailview, self.show_thread) {
(true, true) => {
let area = (set_y(upper_left, y), set_y(bottom_right, mid));
let upper_left = upper_left!(area);
let bottom_right = bottom_right!(area);
let rows = (get_y(bottom_right).saturating_sub(get_y(upper_left) + 1)) / 2;
if rows == 0 {
return;
}
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)),
);
}
(false, true) => {
let area = (set_y(upper_left, y), bottom_right);
let upper_left = upper_left!(area);
let rows = (get_y(bottom_right).saturating_sub(get_y(upper_left) + 1)) / 2;
if rows == 0 {
return;
}
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)),
);
}
(_, false) => { /* show only envelope */ }
}
context.dirty_areas.push_back(area);
self.initiated = true;
}
match (self.show_mailview, self.show_thread) {
(true, true) => {
let area = (set_y(upper_left, mid), set_y(bottom_right, mid));
context.dirty_areas.push_back(area);
for x in get_x(upper_left)..=get_x(bottom_right) {
set_and_join_box(grid, (x, mid), BoxBoundary::Horizontal);
grid[(x, mid)].set_fg(Color::Default);
grid[(x, mid)].set_bg(Color::Default);
}
let area = (set_y(upper_left, y), set_y(bottom_right, mid - 1));
self.draw_list(grid, area, context);
self.mailview
.draw(grid, (set_y(upper_left, mid + 1), bottom_right), context);
}
(false, true) => {
self.dirty = true;
self.draw_list(grid, (set_y(upper_left, y), bottom_right), context);
}
(_, false) => {
self.mailview.draw(grid, area, context);
}
}
}
fn recalc_visible_entries(&mut self) {
if self
.entries
.iter_mut()
.fold(false, |flag, e| e.dirty || flag)
{
self.visible_entries = self
.entries
.iter()
.enumerate()
.fold(
(vec![Vec::new()], SmallVec::<[_; 8]>::new(), false),
|(mut visies, mut stack, is_prev_hidden), (idx, e)| {
match (e.hidden, is_prev_hidden) {
(true, false) => {
visies.last_mut().unwrap().push(idx);
stack.push(e.indentation);
(visies, stack, e.hidden)
}
(true, true)
if !stack.is_empty() && stack[stack.len() - 1] == e.indentation =>
{
visies.push(vec![idx]);
(visies, stack, e.hidden)
}
(true, true) => (visies, stack, e.hidden),
(false, true)
if stack[stack.len() - 1] >= e.indentation
&& stack.len() > 1
&& stack[stack.len() - 2] >= e.indentation =>
{
//FIXME pop all until e.indentation
visies.push(vec![idx]);
stack.pop();
(visies, stack, e.hidden)
}
(false, true) if stack[stack.len() - 1] >= e.indentation => {
visies.push(vec![idx]);
stack.pop();
(visies, stack, e.hidden)
}
(false, true) => (visies, stack, is_prev_hidden),
(false, false) => {
visies.last_mut().unwrap().push(idx);
(visies, stack, e.hidden)
}
}
},
)
.0;
}
if self.reversed {
self.visible_entries.reverse()
}
}
/// Current position in self.entries (not in drawn entries which might exclude nonvisible ones)
fn current_pos(&self) -> usize {
let visibles: Vec<&usize> = self
.visible_entries
.iter()
.flat_map(|ref v| v.iter())
.collect();
*visibles[self.new_cursor_pos]
}
}
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_cols = width!(area);
if self.entries.is_empty() {
self.dirty = false;
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;
let coordinates = (
self.coordinates.0,
self.coordinates.1,
self.entries[self.current_pos()].msg_hash,
);
self.mailview.update(coordinates);
}
if self.entries.len() == 1 {
self.mailview.draw(grid, area, context);
self.dirty = false;
return;
}
if total_cols >= self.content.size().0 + 74 {
self.draw_vert(grid, area, context);
} else {
self.draw_horz(grid, area, context);
}
self.dirty = false;
}
fn process_event(&mut self, event: &mut UIEvent, context: &mut Context) -> bool {
match event {
UIEvent::Action(Listing(OpenInNewTab)) => {
/* Handle this before self.mailview does */
context
.replies
.push_back(UIEvent::Action(Tab(New(Some(Box::new(Self {
initiated: false,
..self.clone()
}))))));
return true;
}
_ => {}
}
if self.show_mailview && self.mailview.process_event(event, context) {
return true;
}
let shortcuts = self.get_shortcuts(context);
match *event {
UIEvent::Input(ref key)
if shortcut!(key == shortcuts[ThreadView::DESCRIPTION]["scroll_up"]) =>
{
if self.cursor_pos > 0 {
self.new_cursor_pos = self.new_cursor_pos.saturating_sub(1);
self.dirty = true;
}
return true;
}
UIEvent::Input(ref key)
if shortcut!(key == shortcuts[ThreadView::DESCRIPTION]["scroll_down"]) =>
{
let height = self.visible_entries.iter().flat_map(|v| v.iter()).count();
if height > 0 && self.new_cursor_pos + 1 < height {
self.new_cursor_pos += 1;
self.dirty = true;
}
return true;
}
UIEvent::Input(ref key)
if shortcut!(key == shortcuts[ThreadView::DESCRIPTION]["prev_page"]) =>
{
self.movement = Some(PageMovement::PageUp(1));
self.dirty = true;
}
UIEvent::Input(ref key)
if shortcut!(key == shortcuts[ThreadView::DESCRIPTION]["next_page"]) =>
{
self.movement = Some(PageMovement::PageDown(1));
self.dirty = true;
}
UIEvent::Input(ref key) if *key == Key::Home => {
self.movement = Some(PageMovement::Home);
self.dirty = true;
}
UIEvent::Input(ref key) if *key == Key::End => {
self.movement = Some(PageMovement::End);
self.dirty = true;
}
UIEvent::Input(Key::Char('\n')) => {
if self.entries.len() < 2 {
return true;
}
self.new_expanded_pos = self.current_pos();
self.show_mailview = true;
//self.initiated = false;
self.set_dirty(true);
return true;
}
UIEvent::Input(ref key)
if shortcut!(key == shortcuts[ThreadView::DESCRIPTION]["toggle_mailview"]) =>
{
self.show_mailview = !self.show_mailview;
self.initiated = false;
self.set_dirty(true);
return true;
}
UIEvent::Input(ref key)
if shortcut!(key == shortcuts[ThreadView::DESCRIPTION]["toggle_threadview"]) =>
{
self.show_thread = !self.show_thread;
self.initiated = false;
self.set_dirty(true);
return true;
}
UIEvent::Input(ref key)
if shortcut!(key == shortcuts[ThreadView::DESCRIPTION]["reverse_thread_order"]) =>
{
self.reversed = !self.reversed;
let expanded_hash = self.entries[self.expanded_pos].index.1;
self.initiate(Some(expanded_hash), context);
self.initiated = false;
self.dirty = true;
return true;
}
UIEvent::Input(ref key)
if shortcut!(key == shortcuts[ThreadView::DESCRIPTION]["collapse_subtree"]) =>
{
let current_pos = self.current_pos();
self.entries[current_pos].hidden = !self.entries[current_pos].hidden;
self.entries[current_pos].dirty = true;
{
let visible_entries: Vec<&usize> =
self.visible_entries.iter().flat_map(|v| v.iter()).collect();
let search_old_cursor_pos = |entries: Vec<&usize>, x: usize| {
let mut low = 0;
let mut high = entries.len() - 1;
while low <= high {
let mid = low + (high - low) / 2;
if *entries[mid] == x {
return mid;
}
if x > *entries[mid] {
low = mid + 1;
} else {
high = mid - 1;
}
}
return high + 1; //mid
};
self.new_cursor_pos = search_old_cursor_pos(visible_entries, self.cursor_pos);
}
self.cursor_pos = self.new_cursor_pos;
self.recalc_visible_entries();
self.dirty = true;
return true;
}
UIEvent::Resize => {
self.set_dirty(true);
}
UIEvent::EnvelopeRename(ref old_hash, ref new_hash) => {
let account = &context.accounts[self.coordinates.0];
for e in self.entries.iter_mut() {
if e.msg_hash == *old_hash {
e.msg_hash = *new_hash;
let seen: bool = account.collection.get_env(*new_hash).is_seen();
if seen != e.seen {
self.dirty = true;
}
e.seen = seen;
}
}
self.mailview
.process_event(&mut UIEvent::EnvelopeRename(*old_hash, *new_hash), context);
}
_ => {
if self.mailview.process_event(event, context) {
return true;
}
}
}
false
}
fn is_dirty(&self) -> bool {
self.dirty || (self.show_mailview && self.mailview.is_dirty())
}
fn set_dirty(&mut self, value: bool) {
self.dirty = value;
self.mailview.set_dirty(value);
}
fn get_shortcuts(&self, context: &Context) -> ShortcutMaps {
let mut map = self.mailview.get_shortcuts(context);
let config_map = context.settings.shortcuts.thread_view.key_values();
map.insert(ThreadView::DESCRIPTION, config_map);
map
}
fn id(&self) -> ComponentId {
self.id
}
fn set_id(&mut self, id: ComponentId) {
self.id = id;
}
fn kill(&mut self, id: ComponentId, context: &mut Context) {
debug_assert!(self.id == id);
context
.replies
.push_back(UIEvent::Action(Tab(Kill(self.id))));
}
}