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use cursive::event::Event;
use cursive::theme::{BaseColor, Color, Effect, Style};
use cursive::traits::{Nameable, Scrollable};
use cursive::utils::markup::StyledString;
use cursive::utils::span::SpannedString;
use cursive::views::{Dialog, TextView};
use cursive::Cursive;
use cursive::XY;
use std::collections::HashMap;
use std::sync::Arc;
use super::markdown;
use super::markdown::Markdown;
use super::views::{
LayoutView, ListView, MdView, Name, Vimable, NAME_ANSWER_LIST, NAME_ANSWER_VIEW,
NAME_QUESTION_LIST, NAME_QUESTION_VIEW,
};
use crate::config;
use crate::error::Result;
use crate::stackexchange::{Answer, Question};
pub const NAME_HELP_VIEW: &str = "help_view";
pub fn run(qs: Vec<Question<Markdown>>) -> Result<()> {
let mut siv = cursive::default();
siv.load_theme_file(config::theme_file_name()?).unwrap(); // TODO dont unwrap
let question_map: HashMap<u32, Question<Markdown>> =
qs.clone().into_iter().map(|q| (q.id, q)).collect();
let question_map = Arc::new(question_map);
let answer_map: HashMap<u32, Answer<Markdown>> = qs
.clone()
.into_iter()
.map(|q| q.answers.into_iter().map(|a| (a.id, a)))
.flatten()
.collect();
let answer_map = Arc::new(answer_map);
let question_view = MdView::new(Name::QuestionView);
let answer_view = MdView::new(Name::AnswerView);
let question_list_view = ListView::new_with_items(
Name::QuestionList,
qs.into_iter().map(|q| (preview_question(&q), q.id)),
move |s, qid| question_selected_callback(question_map.clone(), s, *qid),
);
let answer_list_view = ListView::new(Name::AnswerList, move |s, aid| {
let a = answer_map.get(aid).unwrap();
s.call_on_name(NAME_ANSWER_VIEW, |v: &mut MdView| v.set_content(&a.body));
});
siv.add_layer(
LayoutView::new(
1,
question_list_view,
question_view,
answer_list_view,
answer_view,
)
.add_vim_bindings(),
);
let cb = siv.call_on_name(NAME_QUESTION_LIST, |v: &mut ListView| v.select(0));
if let Some(cb) = cb {
cb(&mut siv)
}
// Help / View keymappings
siv.add_global_callback('?', |s| {
if let Some(pos) = s.screen_mut().find_layer_from_name(NAME_HELP_VIEW) {
s.screen_mut().remove_layer(pos);
} else {
s.add_layer(help());
}
});
// Reload theme
siv.add_global_callback(Event::CtrlChar('r'), |s| {
s.load_theme_file(config::theme_file_name().unwrap())
.unwrap()
});
siv.run();
Ok(())
}
fn question_selected_callback(
question_map: Arc<HashMap<u32, Question<Markdown>>>,
mut s: &mut Cursive,
qid: u32,
) {
let q = question_map.get(&qid).unwrap();
let body = &q.body;
let XY { x, y: _y } = s.screen_size();
// Update question view
s.call_on_name(NAME_QUESTION_VIEW, |v: &mut MdView| {
v.set_content(body);
})
.expect("Panic: setting question view content failed");
// Update answer list view
let cb = s
.call_on_name(NAME_ANSWER_LIST, |v: &mut ListView| {
v.reset_with_all(q.answers.iter().map(|a| (preview_answer(x, a), a.id)))
})
.expect("Panic: setting answer list content failed");
cb(&mut s)
}
fn preview_question(q: &Question<Markdown>) -> StyledString {
let mut preview = pretty_score(q.score);
preview.append_plain(&q.title);
preview
}
fn preview_answer(screen_width: usize, a: &Answer<Markdown>) -> StyledString {
let md = markdown::preview(screen_width, &a.body);
let mut preview = pretty_score(a.score);
if a.is_accepted {
preview.append_styled(
"\u{2713} ", // "✔ "
Style::merge(&[
Style::from(Color::Light(BaseColor::Green)),
Style::from(Effect::Bold),
]),
);
}
preview.append(md);
preview
}
fn pretty_score(score: i32) -> StyledString {
let color = if score > 0 {
Color::Light(BaseColor::Green)
} else {
Color::Light(BaseColor::Red)
};
SpannedString::styled(
format!("({}) ", score),
Style::merge(&[Style::from(color), Style::from(Effect::Bold)]),
)
}
// This would be a good usecase for brining in termimad tables
// TODO dont parse this at runtime, just hardcode it (or include_str)
pub fn help() -> Dialog {
let bindings = r###"
## Panes
**Tab**: Focus next pane
**Space**: Cycle layout (4 Pane, 2 Pane, FullScreen)
## Scroll
**h,j,k,l**: ←,↓,↑,→
**Ctrl<u>**: ↑ x 5
**Ctrl<d>**: ↓ x 5
**Ctrl<b>**: ↑ x 10
**Ctrl<f>**: ↓ x 10
**gg**: Scroll To Top
**G**: Scroll To Bottom
## Misc
**ZZ, Ctrl<c>**: Exit
**?**: Toggle this help menu
"###;
Dialog::around(
TextView::new(markdown::parse(bindings))
.scrollable()
.with_name(NAME_HELP_VIEW),
)
.dismiss_button("Close")
.title("Help")
}
// TODO see cursive/examples/src/bin/select_test.rs for how to test the interface!
// maybe see if we can conditionally run when --nocapture is passed?
|
