Add folder tree

src/app.rs

@@ -6,7 +6,7 @@ use std::{
     time::{Duration, Instant},
 };
 
-use crate::{file_editor::FileEditor, preferences::Preferences, util::GuiSender};
+use crate::{file_editor::FileEditor, folder::Folder, preferences::Preferences, util::GuiSender};
 use egui::{
     Align, Button, Color32, Context, FontData, FontDefinitions, Key, Modifiers, PointerButton,
     RichText, ScrollArea, Stroke,
@@ -25,6 +25,9 @@ pub struct App {
     jobs: Jobs,
 
     tabs: Vec<(TabId, Tab)>,
+
+    folders: Vec<Folder>,
+
     open_tab_index: Option<usize>,
 
     next_tab_id: TabId,
@@ -80,6 +83,7 @@ pub type TabId = usize;
 
 pub enum Action {
     OpenFile(FileEditor),
+    OpenFolder(Folder),
     MoveFile(TabId, PathBuf),
     CloseTab(TabId),
     // TODO
@@ -102,6 +106,7 @@ impl Default for App {
             tabs: vec![(1, Tab::File(FileEditor::new("note.md")))],
             open_tab_index: None,
             next_tab_id: 2,
+            folders: vec![],
         }
     }
 }
@@ -194,6 +199,18 @@ impl App {
 
     fn handle_action(&mut self, action: Action) {
         match action {
+            Action::OpenFolder(new_folder) => {
+                if let Some(folder) = self
+                    .folders
+                    .iter_mut()
+                    .find(|folder| folder.path() == new_folder.path())
+                {
+                    *folder = new_folder;
+                } else {
+                    self.folders.push(new_folder);
+                    self.folders.sort_by(|a, b| a.name().cmp(b.name()));
+                }
+            }
             Action::OpenFile(file_editor) => {
                 self.open_tab(Tab::File(file_editor));
             }
@@ -262,7 +279,12 @@ impl eframe::App for App {
                     }
 
                     if ui.button("Open Folder").clicked() {
-                        log::error!("Open Folder not implemented");
+                        self.jobs.start(ui.ctx(), move || {
+                            let path = rfd::FileDialog::new().pick_folder()?;
+                            let name = path.file_name()?.to_string_lossy().to_string();
+                            let folder = Folder::NotLoaded { name, path };
+                            Some(Action::OpenFolder(folder))
+                        });
                     }
 
                     if ui
@@ -277,8 +299,8 @@ impl eframe::App for App {
                     let can_save_file = self
                         .open_tab_index
                         .and_then(|i| self.tabs.get(i))
-                        .and_then(|(id, tab)| match tab {
-                            Tab::File(file_editor) => Some((*id, file_editor)),
+                        .map(|(id, tab)| match tab {
+                            Tab::File(file_editor) => (*id, file_editor),
                         })
                         .and_then(|(_, file_editor)| file_editor.path().zip(Some(file_editor)))
                         .is_some();
@@ -287,12 +309,11 @@ impl eframe::App for App {
                         self.save_active_tab(ui.ctx());
                     }
 
-                    let open_file =
-                        self.open_tab_index
-                            .and_then(|i| self.tabs.get(i))
-                            .and_then(|(id, tab)| match tab {
-                                Tab::File(file_editor) => Some((*id, file_editor)),
-                            });
+                    let open_file = self.open_tab_index.and_then(|i| self.tabs.get(i)).map(
+                        |(id, tab)| match tab {
+                            Tab::File(file_editor) => (*id, file_editor),
+                        },
+                    );
 
                     #[cfg(not(target_arch = "wasm32"))]
                     if ui
@@ -351,6 +372,39 @@ impl eframe::App for App {
             });
         });
 
+        egui::SidePanel::left("file browser")
+            .resizable(true)
+            .show(ctx, |ui| {
+                if ui.button("refresh").clicked() {
+                    for folder in &mut self.folders {
+                        folder.unload();
+                    }
+                }
+
+                ScrollArea::both().auto_shrink(false).show(ui, |ui| {
+                    self.folders.retain_mut(|folder| {
+                        let response = folder.show(ui);
+
+                        if let Some(file_path) = response.open_file {
+                            let file_path = file_path.to_owned();
+                            self.jobs.start(ui.ctx(), move || {
+                                let text = fs::read_to_string(&file_path)
+                                    .inspect_err(|e| {
+                                        log::error!("Failed to read {file_path:?}: {e}")
+                                    })
+                                    .ok()?;
+
+                                let editor = FileEditor::from_file(file_path, &text);
+                                Some(Action::OpenFile(editor))
+                            });
+                        }
+
+                        // delete on right-click
+                        !response.clicked_by(PointerButton::Secondary)
+                    });
+                });
+            });
+
         egui::CentralPanel::default().show(ctx, |ui| {
             if let Some(Tab::File(file_editor)) = self
                 .open_tab_index
@@ -389,8 +443,8 @@ impl App {
         let open_file = self
             .open_tab_index
             .and_then(|i| self.tabs.get_mut(i))
-            .and_then(|(id, tab)| match tab {
-                Tab::File(file_editor) => Some((*id, file_editor)),
+            .map(|(id, tab)| match tab {
+                Tab::File(file_editor) => (*id, file_editor),
             })
             .and_then(|(_, file_editor)| {
                 file_editor

src/folder.rs

@@ -0,0 +1,218 @@
+use std::{
+    fs::read_dir,
+    mem,
+    ops::Deref,
+    path::{Path, PathBuf},
+    sync::mpsc,
+    thread,
+};
+
+use egui::{Response, Ui};
+use eyre::{Context, OptionExt, eyre};
+use serde::{Deserialize, Serialize};
+
+pub enum Folder {
+    NotLoaded {
+        name: String,
+        path: PathBuf,
+    },
+    Loading {
+        name: String,
+        path: PathBuf,
+        recv: mpsc::Receiver<LoadedFolder>,
+    },
+    Loaded(LoadedFolder),
+}
+
+pub struct LoadedFolder {
+    pub name: String,
+    pub path: PathBuf,
+    pub child_folders: Vec<Folder>,
+    pub child_files: Vec<File>,
+}
+
+pub struct File {
+    pub name: String,
+    pub path: PathBuf,
+}
+
+pub struct FolderResponse<'a> {
+    inner: Response,
+    pub open_file: Option<&'a Path>,
+}
+
+impl Deref for FolderResponse<'_> {
+    type Target = Response;
+
+    fn deref(&self) -> &Self::Target {
+        &self.inner
+    }
+}
+
+impl LoadedFolder {
+    pub fn show<'a>(&'a mut self, ui: &mut Ui) -> FolderResponse<'a> {
+        let mut open_file = None;
+        let inner = ui
+            .collapsing(&self.name, |ui| {
+                for folder in &mut self.child_folders {
+                    open_file = open_file.or(folder.show(ui).open_file);
+                }
+
+                for file in &mut self.child_files {
+                    if ui.button(&file.name).clicked() {
+                        open_file = Some(file.path.as_path())
+                    };
+                }
+            })
+            .header_response;
+
+        FolderResponse { inner, open_file }
+    }
+
+    fn load(path: PathBuf) -> eyre::Result<Self> {
+        let name = path
+            .file_name()
+            .ok_or_eyre("Path is missing a file-name")?
+            .to_string_lossy()
+            .to_string();
+
+        let mut child_folders = vec![];
+        let mut child_files = vec![];
+
+        for entry in read_dir(&path).with_context(|| eyre!("Couldn't read dir {path:?}"))? {
+            let entry = entry.with_context(|| eyre!("Couldn't read dir {path:?}"))?;
+            let path = entry.path();
+            let name = path
+                .file_name()
+                .ok_or_eyre("Path is missing a file-name")?
+                .to_string_lossy()
+                .to_string();
+
+            let file_type = entry.file_type()?;
+
+            if file_type.is_symlink() {
+                log::error!("Symlinks not yet supported, skipping {path:?}");
+                continue;
+            } else if file_type.is_file() {
+                child_files.push(File { name, path });
+            } else if file_type.is_dir() {
+                child_folders.push(Folder::NotLoaded { name, path });
+            }
+        }
+
+        let folder = LoadedFolder {
+            name,
+            path,
+            child_folders,
+            child_files,
+        };
+
+        Ok(folder)
+    }
+}
+
+impl Folder {
+    fn load(&mut self, ui: &mut Ui) -> Option<&mut LoadedFolder> {
+        if let Folder::NotLoaded { name, path } = self {
+            let (tx, rx) = mpsc::channel();
+
+            {
+                let path = path.clone();
+                let ctx = ui.ctx().clone();
+                thread::spawn(move || match LoadedFolder::load(path) {
+                    Err(e) => log::error!("Failed to load folder: {e}"),
+                    Ok(folder) => {
+                        let _ = tx.send(folder);
+                        ctx.request_repaint();
+                    }
+                });
+            }
+
+            *self = Folder::Loading {
+                name: mem::take(name),
+                path: mem::take(path),
+                recv: rx,
+            };
+        }
+
+        if let Folder::Loading { recv, .. } = self {
+            match recv.try_recv() {
+                Ok(folder) => *self = Folder::Loaded(folder),
+                Err(_) => return None,
+            }
+        }
+
+        let Folder::Loaded(folder) = self else {
+            unreachable!()
+        };
+
+        Some(folder)
+    }
+
+    pub fn show<'a>(&'a mut self, ui: &mut Ui) -> FolderResponse<'a> {
+        self.load(ui);
+
+        if let Folder::Loaded(folder) = self {
+            return folder.show(ui);
+        }
+
+        FolderResponse {
+            inner: ui.label(self.name()),
+            open_file: None,
+        }
+    }
+
+    pub fn path(&self) -> &Path {
+        match self {
+            Folder::NotLoaded { path, .. } => path,
+            Folder::Loading { path, .. } => path,
+            Folder::Loaded(folder) => &folder.path,
+        }
+    }
+
+    pub fn name(&self) -> &str {
+        match self {
+            Folder::NotLoaded { name, .. } => name,
+            Folder::Loading { name, .. } => name,
+            Folder::Loaded(folder) => &folder.name,
+        }
+    }
+
+    pub fn unload(&mut self) {
+        let (name, path) = match self {
+            Folder::NotLoaded { .. } => return,
+            Folder::Loading { name, path, .. } => (name, path),
+            Folder::Loaded(folder) => (&mut folder.name, &mut folder.path),
+        };
+
+        *self = Folder::NotLoaded {
+            name: mem::take(name),
+            path: mem::take(path),
+        }
+    }
+}
+
+impl Serialize for Folder {
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: serde::Serializer,
+    {
+        self.path().serialize(serializer)
+    }
+}
+
+impl<'de> Deserialize<'de> for Folder {
+    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
+    where
+        D: serde::Deserializer<'de>,
+    {
+        use serde::de::Error;
+        let path = PathBuf::deserialize(deserializer)?;
+        let name = path
+            .file_name()
+            .ok_or(D::Error::custom("Path is missing a file-name"))?
+            .to_string_lossy()
+            .to_string();
+        Ok(Folder::NotLoaded { name, path })
+    }
+}

src/handwriting/mod.rs

@@ -289,11 +289,11 @@ impl Handwriting {
                         _ => Some(next),
                     }
                 })
-                .cloned()
                 .filter(|event| {
                     // FIXME: pinenote: PointerMoved are duplicated after the MouseMoved events
                     cfg!(not(feature = "pinenote")) || !matches!(event, Event::PointerMoved(..))
                 })
+                .cloned()
                 .collect::<Vec<_>>()
             });
 
@@ -459,6 +459,8 @@ impl Handwriting {
         mesh_context: MeshContext,
         ui: &mut Ui,
     ) {
+        // TODO: don't tesselate and rasterize on the GUI thread
+
         self.last_mesh_ctx = Some(mesh_context);
 
         self.refresh_texture = false;
@@ -646,6 +648,7 @@ impl FromStr for Handwriting {
             .wrap_err("Failed to decode painting data from base64")?;
 
         // HACK: first iteration of disk format did not have version header
+        //let mut bytes = bytes;
         //bytes.insert(0, 0);
         //bytes.insert(0, 1);
 

src/lib.rs

@@ -5,6 +5,7 @@ pub mod constants;
 pub mod custom_code_block;
 pub mod easy_mark;
 pub mod file_editor;
+pub mod folder;
 pub mod handwriting;
 pub mod preferences;
 pub mod rasterizer;

src/rasterizer.rs

@@ -165,11 +165,9 @@ fn point_in_triangle(point: Pos2, triangle: [&Vertex; 3]) -> PointInTriangle {
     // Normalize the weights.
     let weights = areas.map(|area| area / triangle_area);
 
-    if cfg!(debug_assertions) {
-        if weights.into_iter().any(f32::is_nan) {
+    if cfg!(debug_assertions) && weights.into_iter().any(f32::is_nan) {
         panic!("weights must not be NaN! {weights:?} {triangle_area:?} {areas:?} {sides:?}");
     }
-    }
 
     PointInTriangle { inside, weights }
 }