ZacharyZhang-NY
444a95a854
- a page centers only while it fits the view; a wider one starts in reach - the reveal runs after the pages' prepaint and keys on the hit itself, so a new hit at the same index and a hit current from the first frame come into view - the chapter list scrolls - zen takes focus when turned on from outside, so Escape leaves it, and hands focus back - the gallery keeps a page's due date and tags
247 lines
9.7 KiB
Rust
247 lines
9.7 KiB
Rust
use std::rc::Rc;
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use gpui::{
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App, ElementId, InteractiveElement, IntoElement, MouseButton, ParentElement, RenderOnce,
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ScrollHandle, SharedString, StatefulInteractiveElement, Styled, Window, div, prelude::*,
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};
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use super::{reading::ReadingProgress, render::MarkdownRenderer};
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use crate::{
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buttons::{Button, ButtonVariant, IconButton, ToggleButton, ToggleItem},
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primitives::IconName,
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theme::{ActiveTheme, ContainerSize, ControlSize, Radius, TextSize},
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typography::tabular,
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};
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/// Type sizes a reader steps through.
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const SIZES: [TextSize; 4] = [TextSize::Sm, TextSize::Base, TextSize::Lg, TextSize::Xl];
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/// A chapter of a book the app opened: its title and its text, as markdown.
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#[derive(Clone, Debug, PartialEq)]
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pub struct Chapter {
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pub title: SharedString,
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pub markdown: SharedString,
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}
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/// Where the reader is: the chapter, the type size, whether the chapters show, and the chapter's scroll.
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struct Place {
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chapter: usize,
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size: usize,
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contents: bool,
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scroll: ScrollHandle,
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}
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/// A book read a chapter at a time: the chapter in a column sized for reading with how far through it the reader is, the chapters listed to jump between, the type a step larger or smaller, and the chapters before and after a press away.
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#[derive(IntoElement)]
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pub struct EpubReader {
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id: ElementId,
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title: SharedString,
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chapters: Rc<Vec<Chapter>>,
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}
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impl EpubReader {
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pub fn new(
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id: impl Into<ElementId>,
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title: impl Into<SharedString>,
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chapters: impl Into<Rc<Vec<Chapter>>>,
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) -> Self {
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let chapters = chapters.into();
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assert!(!chapters.is_empty(), "a book holds a chapter");
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Self {
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id: id.into(),
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title: title.into(),
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chapters,
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}
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}
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}
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fn set(place: &gpui::Entity<Place>, cx: &mut App, change: impl FnOnce(&mut Place)) {
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place.update(cx, |place, cx| {
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change(place);
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cx.notify();
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});
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}
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impl RenderOnce for EpubReader {
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fn render(self, window: &mut Window, cx: &mut App) -> impl IntoElement {
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let place = window.use_keyed_state((self.id.clone(), "place"), cx, |_, _| Place {
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chapter: 0,
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size: 1,
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contents: false,
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scroll: ScrollHandle::new(),
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});
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let (chapter, size, contents, scroll) = {
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let place = place.read(cx);
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(
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place.chapter.min(self.chapters.len() - 1),
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place.size,
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place.contents,
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place.scroll.clone(),
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)
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};
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let theme = cx.theme();
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let colors = theme.colors.clone();
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let count = self.chapters.len();
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let turn = |to: usize| {
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let (place, scroll) = (place.clone(), scroll.clone());
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move |_: &gpui::ClickEvent, _: &mut Window, cx: &mut App| {
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log::info!("epub reader: chapter {to}");
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scroll.set_offset(gpui::Point::default());
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set(&place, cx, |place| place.chapter = to);
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}
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};
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let sized = |to: Option<usize>, icon: IconName, tip: &'static str| {
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let place = place.clone();
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IconButton::new((self.id.clone(), tip), icon)
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.variant(ButtonVariant::Ghost)
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.size(ControlSize::Sm)
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.tooltip(tip)
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.disabled(to.is_none())
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.when_some(to, |button, to| {
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button.on_click(move |_, _, cx| set(&place, cx, |place| place.size = to))
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})
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};
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let shown = &self.chapters[chapter];
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let listed = contents.then(|| {
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div()
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.id((self.id.clone(), "chapters"))
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.flex_none()
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.w(theme.sidebar_width(false))
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.overflow_y_scroll()
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.flex()
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.flex_col()
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.gap_0p5()
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.p_2()
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.border_r_1()
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.border_color(colors.border)
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.children(self.chapters.iter().enumerate().map(|(ix, entry)| {
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div()
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.id((self.id.clone(), format!("chapter-{ix}")))
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.px_2()
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.py_1()
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.rounded(theme.radius(Radius::Sm))
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.cursor_pointer()
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.text_color(if ix == chapter {
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colors.fg
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} else {
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colors.fg_muted
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})
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.when(ix == chapter, |row| row.bg(colors.active))
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.hover(|row| row.bg(colors.hover))
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.on_mouse_down(MouseButton::Left, |_, window, _| window.prevent_default())
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.on_click(turn(ix))
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.child(entry.title.clone())
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}))
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});
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let toggle = place.clone();
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div()
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.id(self.id.clone())
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.size_full()
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.flex()
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.flex_col()
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.rounded(theme.radius(Radius::Lg))
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.border_1()
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.border_color(colors.border)
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.overflow_hidden()
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.bg(colors.surface)
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.child(
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div()
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.flex()
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.items_center()
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.gap_2()
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.px_2()
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.h(theme.control_height(ControlSize::Lg))
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.child(
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ToggleButton::new(
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(self.id.clone(), "contents"),
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ToggleItem::new("contents")
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.icon(IconName::List)
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.tooltip("Chapters"),
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contents,
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)
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.size(ControlSize::Sm)
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.on_toggle(move |on, _, cx| set(&toggle, cx, |place| place.contents = on)),
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)
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.child(
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div()
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.flex_1()
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.min_w_0()
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.text_color(colors.fg_muted)
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.child(self.title.clone()),
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)
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.child(
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tabular(
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div()
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.text_size(theme.text_size(TextSize::Sm))
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.text_color(colors.fg_subtle),
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)
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.child(format!("{} of {count}", chapter + 1)),
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)
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.child(sized(
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size.checked_sub(1),
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IconName::AArrowDown,
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"Smaller type",
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))
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.child(sized(
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Some(size + 1).filter(|size| *size < SIZES.len()),
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IconName::AArrowUp,
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"Larger type",
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)),
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)
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.child(ReadingProgress::new(&scroll))
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.child(
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div().flex().flex_1().min_h_0().children(listed).child(
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div()
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.id((self.id.clone(), "page"))
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.flex_1()
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.min_w_0()
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.overflow_y_scroll()
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.track_scroll(&scroll)
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.child(
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div()
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.mx_auto()
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.max_w(theme.container_width(ContainerSize::Sm))
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.px_8()
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.py_8()
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.flex()
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.flex_col()
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.gap_6()
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.child(
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MarkdownRenderer::new(
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(self.id.clone(), format!("text-{chapter}")),
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shown.markdown.clone(),
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)
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.text_size(SIZES[size]),
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)
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.child(
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div()
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.flex()
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.justify_between()
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.pt_4()
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.border_t_1()
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.border_color(colors.border)
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.child(div().children(chapter.checked_sub(1).map(
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|previous| {
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Button::new(
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(self.id.clone(), "previous"),
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format!("← {}", self.chapters[previous].title),
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)
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.variant(ButtonVariant::Ghost)
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.on_click(turn(previous))
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},
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)))
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.child(div().children((chapter + 1 < count).then(|| {
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Button::new(
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(self.id.clone(), "next"),
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format!("{} →", self.chapters[chapter + 1].title),
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)
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.variant(ButtonVariant::Ghost)
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.on_click(turn(chapter + 1))
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}))),
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),
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),
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),
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)
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}
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}
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