From 62584cfddc70af611944a798347a1c01ab68627a Mon Sep 17 00:00:00 2001
From: Integral <integral@murena.io>
Date: Sun, 24 Sep 2023 18:08:24 +0800
Subject: [PATCH] app/src/manager/preview.rs: optimize code readability

---
 app/src/manager/#folder.rs# | 141 ++++++++++++++++++++++++++++++++++++
 app/src/manager/preview.rs  |   2 +-
 2 files changed, 142 insertions(+), 1 deletion(-)
 create mode 100644 app/src/manager/#folder.rs#

diff --git a/app/src/manager/#folder.rs# b/app/src/manager/#folder.rs#
new file mode 100644
index 00000000..f49a5840
--- /dev/null
+++ b/app/src/manager/#folder.rs#
@@ -0,0 +1,141 @@
+use core::files::File;
+
+use config::{MANAGER, THEME};
+use ratatui::{
+	buffer::Buffer,
+	layout::Rect,
+	style::{Color, Modifier, Style},
+	text::{Line, Span},
+	widgets::{List, ListItem, Widget},
+};
+use shared::short_path;
+
+use crate::Ctx;
+
+pub(super) struct Folder<'a> {
+	cx: &'a Ctx,
+	folder: &'a core::manager::Folder,
+	is_preview: bool,
+	is_selection: bool,
+	is_find: bool,
+}
+
+impl<'a> Folder<'a> {
+	pub(super) fn new(cx: &'a Ctx, folder: &'a core::manager::Folder) -> Self {
+		Self { cx, folder, is_preview: false, is_selection: false, is_find: false }
+	}
+
+	#[inline]
+	pub(super) fn with_preview(mut self, state: bool) -> Self {
+		self.is_preview = state;
+		self
+	}
+
+	#[inline]
+	pub(super) fn with_selection(mut self, state: bool) -> Self {
+		self.is_selection = state;
+		self
+	}
+
+	#[inline]
+	pub(super) fn with_find(mut self, state: bool) -> Self {
+		self.is_find = state;
+		self
+	}
+}
+
+impl<'a> Folder<'a> {
+	#[inline]
+	fn icon(file: &File) -> &'static str {
+		THEME
+			.icons
+			.iter()
+			.find(|x| x.name.match_path(file.url(), Some(file.is_dir())))
+			.map(|x| x.display.as_ref())
+			.unwrap_or("")
+	}
+
+	#[inline]
+	fn file_style(&self, file: &File) -> Style {
+		let mimetype = &self.cx.manager.mimetype;
+		THEME
+			.filetypes
+			.iter()
+			.find(|x| x.matches(file.url(), mimetype.get(file.url()), file.is_dir()))
+			.map(|x| x.style.get())
+			.unwrap_or_else(Style::new)
+	}
+}
+
+impl<'a> Widget for Folder<'a> {
+	fn render(self, area: Rect, buf: &mut Buffer) {
+		let active = self.cx.manager.active();
+		let mode = active.mode();
+
+		let window = if self.is_preview {
+			self.folder.window_for(active.preview().skip())
+		} else {
+			self.folder.window()
+		};
+
+		let items: Vec<_> = window
+			.iter()
+			.enumerate()
+			.map(|(i, file)| {
+				let is_selected = self.folder.files.is_selected(file.url());
+				if (!self.is_selection && is_selected)
+					|| (self.is_selection && mode.pending(self.folder.offset() + i, is_selected))
+				{
+					buf.set_style(
+						Rect { x: area.x.saturating_sub(1), y: i as u16 + 1, width: 1, height: 1 },
+						if self.is_selection {
+							THEME.marker.selecting.get()
+						} else {
+							THEME.marker.selected.get()
+						},
+					);
+				}
+
+				let hovered = matches!(self.folder.hovered, Some(ref hover) if hover.url() == file.url());
+
+				let style = match (self.is_preview, hovered) {
+					(true, true) => THEME.preview.hovered.get(),
+					(_, true) => THEME.selection.hovered.get(),
+					_ => self.file_style(file),
+				};
+
+				let mut spans = Vec::with_capacity(10);
+
+				spans.push(Span::raw(format!(" {} ", Self::icon(file))));
+				spans.push(Span::raw(short_path(file.url(), &self.folder.cwd)));
+
+				if let Some(link_to) = file.link_to() {
+					if MANAGER.show_symlink {
+						spans.push(Span::raw(format!(" -> {}", link_to.display())));
+					}
+				}
+
+				if let Some(idx) = active
+					.finder()
+					.filter(|&finder| hovered && self.is_find && finder.has_matched())
+					.and_then(|finder| finder.matched_idx(file.url()))
+				{
+					let len = active.finder().unwrap().matched().len();
+					let style = Style::new().fg(Color::Rgb(255, 255, 50)).add_modifier(Modifier::ITALIC);
+					spans.push(Span::styled(
+						format!(
+							"  [{}/{}]",
+							if idx > 99 { ">99".to_string() } else { (idx + 1).to_string() },
+							if len > 99 { ">99".to_string() } else { len.to_string() }
+						),
+						style,
+					));
+				}
+
+				ListItem::new(Line::from(spans)).style(style)
+			})
+			.collect();
+
+		List::new(items).render(area, buf);
+	}
+}
diff --git a/app/src/manager/preview.rs b/app/src/manager/preview.rs
index c75df174..1943c5fa 100644
--- a/app/src/manager/preview.rs
+++ b/app/src/manager/preview.rs
@@ -17,7 +17,7 @@ impl<'a> Preview<'a> {
 impl<'a> Widget for Preview<'a> {
 	fn render(self, area: Rect, buf: &mut Buffer) {
 		let manager = &self.cx.manager;
-		let Some(hovered) = manager.hovered().map(|h| h.url()) else {
+		let Some(hovered) = manager.hovered().map(|hovered| hovered.url()) else {
 			return;
 		};