Merged in strider

Cargo.toml

@@ -0,0 +1,16 @@
+[package]
+name = "module"
+version = "0.2.0"
+authors = ["Brooks J Rady <b.j.rady@gmail.com>"]
+edition = "2018"
+description = "A simplified ranger clone written as a mosaic tile"
+repository = "https://github.com/mosaic-org/strider"
+license = "MIT"
+
+[dependencies]
+colored = "2"
+mosaic-tile = "0.4"
+pretty-bytes = "0.2"
+
+[profile.release]
+lto = true

LICENSE.md

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2020 Mosaic contributors
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

build-optimised.sh

@@ -0,0 +1,6 @@
+#!/bin/sh
+
+# Build a release WASM from Rust with lto on
+cargo build --release
+# Further optimise for speed (and size)
+wasm-opt -O target/wasm32-wasi/release/module.wasm -o target/strider.wasm

src/main.rs

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+mod state;
+
+use colored::*;
+use mosaic_tile::*;
+use state::{FsEntry, State};
+use std::{cmp::min, fs::read_dir};
+
+register_tile!(State);
+
+impl MosaicTile for State {
+    fn init(&mut self) {
+        refresh_directory(self);
+    }
+
+    fn draw(&mut self, rows: usize, cols: usize) {
+        for i in 0..rows {
+            if self.selected() < self.scroll() {
+                *self.scroll_mut() = self.selected();
+            }
+            if self.selected() - self.scroll() + 2 > rows {
+                *self.scroll_mut() = self.selected() + 2 - rows;
+            }
+            let i = self.scroll() + i;
+            if let Some(entry) = self.files.get(i) {
+                let mut path = entry.as_line(cols).normal();
+
+                if let FsEntry::Dir(..) = entry {
+                    path = path.dimmed().bold();
+                }
+
+                if i == self.selected() {
+                    println!("{}", path.reversed());
+                } else {
+                    println!("{}", path);
+                }
+            } else {
+                println!();
+            }
+        }
+    }
+
+    fn handle_key(&mut self, key: Key) {
+        match key {
+            Key::Up => {
+                *self.selected_mut() = self.selected().saturating_sub(1);
+            }
+            Key::Down => {
+                let next = self.selected().saturating_add(1);
+                *self.selected_mut() = min(self.files.len() - 1, next);
+            }
+            Key::Right | Key::Char('\n') => match self.files[self.selected()].clone() {
+                FsEntry::Dir(p, _) => {
+                    self.path = p;
+                    refresh_directory(self);
+                }
+                FsEntry::File(p, _) => open_file(&p),
+            },
+            Key::Left => {
+                self.path.pop();
+                refresh_directory(self);
+            }
+            _ => (),
+        };
+    }
+}
+
+fn refresh_directory(state: &mut State) {
+    state.files = read_dir(&state.path)
+        .unwrap()
+        .filter_map(|res| {
+            res.and_then(|d| {
+                if d.metadata()?.is_dir() {
+                    let children = read_dir(d.path())?.count();
+                    Ok(FsEntry::Dir(d.path(), children))
+                } else {
+                    let size = d.metadata()?.len();
+                    Ok(FsEntry::File(d.path(), size))
+                }
+            })
+            .ok()
+        })
+        .collect();
+
+    state.files.sort_unstable();
+}

src/state.rs

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+use pretty_bytes::converter as pb;
+use std::{collections::HashMap, path::PathBuf};
+
+#[derive(Default)]
+pub struct State {
+    pub path: PathBuf,
+    pub files: Vec<FsEntry>,
+    pub cursor_hist: HashMap<PathBuf, (usize, usize)>,
+}
+
+impl State {
+    pub fn selected_mut(&mut self) -> &mut usize {
+        &mut self.cursor_hist.entry(self.path.clone()).or_default().0
+    }
+    pub fn selected(&self) -> usize {
+        self.cursor_hist.get(&self.path).unwrap_or(&(0, 0)).0
+    }
+    pub fn scroll_mut(&mut self) -> &mut usize {
+        &mut self.cursor_hist.entry(self.path.clone()).or_default().1
+    }
+    pub fn scroll(&self) -> usize {
+        self.cursor_hist.get(&self.path).unwrap_or(&(0, 0)).1
+    }
+}
+
+#[derive(PartialEq, Eq, PartialOrd, Ord, Clone)]
+pub enum FsEntry {
+    Dir(PathBuf, usize),
+    File(PathBuf, u64),
+}
+
+impl FsEntry {
+    pub fn name(&self) -> String {
+        let path = match self {
+            FsEntry::Dir(p, _) => p,
+            FsEntry::File(p, _) => p,
+        };
+        path.file_name().unwrap().to_string_lossy().into_owned()
+    }
+
+    pub fn as_line(&self, width: usize) -> String {
+        let info = match self {
+            FsEntry::Dir(_, s) => s.to_string(),
+            FsEntry::File(_, s) => pb::convert(*s as f64),
+        };
+        let space = width - info.len();
+        let name = self.name();
+        if space - 1 < name.len() {
+            [&name[..space - 2], &info].join("~ ")
+        } else {
+            let padding = " ".repeat(space - name.len());
+            [name, padding, info].concat()
+        }
+    }
+}