Move most key handling to the update() + event system

8 files changed, 82 insertions, 126 deletions

diff --git a/default-tiles/strider/src/main.rs b/default-tiles/strider/src/main.rs
index 08f44707..c2867fe4 100644
--- a/default-tiles/strider/src/main.rs
+++ b/default-tiles/strider/src/main.rs
@@ -10,6 +10,41 @@ register_tile!(State);
 impl ZellijTile for State {
     fn load(&mut self) {
         refresh_directory(self);
+        subscribe(&[EventType::KeyPress]);
+    }
+
+    fn update(&mut self, event: Event) {
+        if let Event::KeyPress(key) = event {
+            match key {
+                Key::Up | Key::Char('k') => {
+                    *self.selected_mut() = self.selected().saturating_sub(1);
+                }
+                Key::Down | Key::Char('j') => {
+                    let next = self.selected().saturating_add(1);
+                    *self.selected_mut() = min(self.files.len() - 1, next);
+                }
+                Key::Right | Key::Char('\n') | Key::Char('l') => {
+                    match self.files[self.selected()].clone() {
+                        FsEntry::Dir(p, _) => {
+                            self.path = p;
+                            refresh_directory(self);
+                        }
+                        FsEntry::File(p, _) => open_file(&p),
+                    }
+                }
+                Key::Left | Key::Char('h') => {
+                    self.path.pop();
+                    refresh_directory(self);
+                }
+
+                Key::Char('.') => {
+                    self.toggle_hidden_files();
+                    refresh_directory(self);
+                }
+
+                _ => (),
+            };
+        }
     }
 
     fn render(&mut self, rows: usize, cols: usize) {
@@ -38,38 +73,6 @@ impl ZellijTile for State {
             }
         }
     }
-
-    fn handle_key(&mut self, key: Key) {
-        match key {
-            Key::Up | Key::Char('k') => {
-                *self.selected_mut() = self.selected().saturating_sub(1);
-            }
-            Key::Down | Key::Char('j') => {
-                let next = self.selected().saturating_add(1);
-                *self.selected_mut() = min(self.files.len() - 1, next);
-            }
-            Key::Right | Key::Char('\n') | Key::Char('l') => {
-                match self.files[self.selected()].clone() {
-                    FsEntry::Dir(p, _) => {
-                        self.path = p;
-                        refresh_directory(self);
-                    }
-                    FsEntry::File(p, _) => open_file(&p),
-                }
-            }
-            Key::Left | Key::Char('h') => {
-                self.path.pop();
-                refresh_directory(self);
-            }
-
-            Key::Char('.') => {
-                self.toggle_hidden_files();
-                refresh_directory(self);
-            }
-
-            _ => (),
-        };
-    }
 }
 
 fn refresh_directory(state: &mut State) {
diff --git a/src/client/tab.rs b/src/client/tab.rs
index 1818672b..1a3f411d 100644
--- a/src/client/tab.rs
+++ b/src/client/tab.rs
@@ -1,11 +1,11 @@
 //! `Tab`s holds multiple panes. It tracks their coordinates (x/y) and size,
 //! as well as how they should be resized
 
-use crate::common::{AppInstruction, SenderWithContext};
+use crate::common::{input::handler::parse_keys, AppInstruction, SenderWithContext};
 use crate::layout::Layout;
 use crate::panes::{PaneId, PositionAndSize, TerminalPane};
 use crate::pty_bus::{PtyInstruction, VteEvent};
-use crate::wasm_vm::{PluginInputType, PluginInstruction};
+use crate::wasm_vm::PluginInstruction;
 use crate::{boundaries::Boundaries, panes::PluginPane};
 use crate::{os_input_output::OsApi, utils::shared::pad_to_size};
 use std::os::unix::io::RawFd;
@@ -14,6 +14,7 @@ use std::{
     collections::{BTreeMap, HashSet},
 };
 use std::{io::Write, sync::mpsc::channel};
+use zellij_tile::data::Event;
 
 const CURSOR_HEIGHT_WIDTH_RATIO: usize = 4; // this is not accurate and kind of a magic number, TODO: look into this
 const MIN_TERMINAL_HEIGHT: usize = 2;
@@ -553,12 +554,11 @@ impl Tab {
                     .expect("failed to drain terminal");
             }
             Some(PaneId::Plugin(pid)) => {
-                self.send_plugin_instructions
-                    .send(PluginInstruction::Input(
-                        PluginInputType::Normal(pid),
-                        input_bytes,
-                    ))
-                    .unwrap();
+                for key in parse_keys(&input_bytes) {
+                    self.send_plugin_instructions
+                        .send(PluginInstruction::Update(Some(pid), Event::KeyPress(key)))
+                        .unwrap()
+                }
             }
             _ => {}
         }
diff --git a/src/common/errors.rs b/src/common/errors.rs
index 11d13c7e..b12a57a1 100644
--- a/src/common/errors.rs
+++ b/src/common/errors.rs
@@ -281,7 +281,6 @@ pub enum PluginContext {
     Update,
     Render,
     Input,
-    GlobalInput,
     Unload,
     Quit,
     Tabs,
@@ -291,10 +290,9 @@ impl From<&PluginInstruction> for PluginContext {
     fn from(plugin_instruction: &PluginInstruction) -> Self {
         match *plugin_instruction {
             PluginInstruction::Load(..) => PluginContext::Load,
-            PluginInstruction::Update(_) => PluginContext::Update,
+            PluginInstruction::Update(..) => PluginContext::Update,
             PluginInstruction::Render(..) => PluginContext::Render,
             PluginInstruction::Input(..) => PluginContext::Input,
-            PluginInstruction::GlobalInput(_) => PluginContext::GlobalInput,
             PluginInstruction::Unload(_) => PluginContext::Unload,
             PluginInstruction::Quit => PluginContext::Quit,
             PluginInstruction::UpdateTabs(..) => PluginContext::Tabs,
diff --git a/src/common/input/handler.rs b/src/common/input/handler.rs
index 90afb64c..4b948cbf 100644
--- a/src/common/input/handler.rs
+++ b/src/common/input/handler.rs
@@ -10,8 +10,8 @@ use crate::screen::ScreenInstruction;
 use crate::wasm_vm::{NaughtyEventType, PluginInputType, PluginInstruction};
 use crate::CommandIsExecuting;
 
-use termion::input::TermReadEventsAndRaw;
-use zellij_tile::data::{Event, Help, InputMode, Key};
+use termion::input::{TermRead, TermReadEventsAndRaw};
+use zellij_tile::data::{Help, InputMode, Key};
 
 use super::keybinds::key_to_actions;
 
@@ -61,19 +61,15 @@ impl InputHandler {
             'input_loop: loop {
                 //@@@ I think this should actually just iterate over stdin directly
                 let stdin_buffer = self.os_input.read_from_stdin();
-                // FIXME: Kill me someday (soon)
-                drop(
-                    self.send_plugin_instructions
-                        .send(PluginInstruction::GlobalInput(stdin_buffer.clone())),
-                );
                 for key_result in stdin_buffer.events_and_raw() {
                     match key_result {
                         Ok((event, raw_bytes)) => match event {
                             termion::event::Event::Key(key) => {
                                 let key = cast_termion_key(key);
+                                // FIXME: This is a bit of a hack to get resizing to work!
                                 drop(
-                                    self.send_plugin_instructions
-                                        .send(PluginInstruction::Update(Event::KeyPress(key))),
+                                    self.send_screen_instructions
+                                        .send(ScreenInstruction::Render),
                                 );
                                 // FIXME this explicit break is needed because the current test
                                 // framework relies on it to not create dead threads that loop
@@ -327,6 +323,10 @@ pub fn input_loop(
     .handle_input();
 }
 
+pub fn parse_keys(input_bytes: &[u8]) -> Vec<Key> {
+    input_bytes.keys().flatten().map(cast_termion_key).collect()
+}
+
 // FIXME: This is an absolutely cursed function that should be destroyed as soon
 // as an alternative that doesn't touch zellij-tile can be developed...
 fn cast_termion_key(event: termion::event::Key) -> Key {
diff --git a/src/common/mod.rs b/src/common/mod.rs
index 70edcea8..b8a4c671 100644
--- a/src/common/mod.rs
+++ b/src/common/mod.rs
@@ -17,6 +17,7 @@ use std::{collections::HashMap, fs};
 use std::{
     collections::HashSet,
     io::Write,
+    str::FromStr,
     sync::{Arc, Mutex},
 };
 
@@ -40,7 +41,7 @@ use wasm_vm::{
 };
 use wasmer::{ChainableNamedResolver, Instance, Module, Store, Value};
 use wasmer_wasi::{Pipe, WasiState};
-use zellij_tile::data::{InputMode, Key};
+use zellij_tile::data::{EventType, InputMode, Key};
 
 #[derive(Serialize, Deserialize, Debug)]
 pub enum ApiCommand {
@@ -549,16 +550,21 @@ pub fn start(mut os_input: Box<dyn OsApi>, opts: CliArgs) {
                         pid_tx.send(plugin_id).unwrap();
                         plugin_id += 1;
                     }
-                    PluginInstruction::Update(event) => {
-                        for (instance, plugin_env) in plugin_map.values() {
-                            let update = instance.exports.get_function("update").unwrap();
-
-                            wasi_write_string(
-                                &plugin_env.wasi_env,
-                                &serde_json::to_string(&event).unwrap(),
-                            );
-                            update.call(&[]).unwrap();
+                    PluginInstruction::Update(pid, event) => {
+                        for (&i, (instance, plugin_env)) in &plugin_map {
+                            let subs = plugin_env.subscriptions.lock().unwrap();
+                            // FIXME: This is very janky... Maybe I should write my own macro for Event -> EventType?
+                            let event_type = EventType::from_str(&event.to_string()).unwrap();
+                            if pid.is_none() || pid == Some(i) && subs.contains(&event_type) {
+                                let update = instance.exports.get_function("update").unwrap();
+                                wasi_write_string(
+                                    &plugin_env.wasi_env,
+                                    &serde_json::to_string(&event).unwrap(),
+                                );
+                                update.call(&[]).unwrap();
+                            }
                         }
+                        drop(send_screen_instructions.send(ScreenInstruction::Render));
                     }
                     PluginInstruction::Render(buf_tx, pid, rows, cols) => {
                         let (instance, plugin_env) = plugin_map.get(&pid).unwrap();
@@ -587,11 +593,15 @@ pub fn start(mut os_input: Box<dyn OsApi>, opts: CliArgs) {
                     }
                     // FIXME: Deduplicate this with the callback below!
                     PluginInstruction::Input(input_type, input_bytes) => {
-                        match input_type {
-                            PluginInputType::Normal(pid) => {
-                                let (instance, plugin_env) = plugin_map.get(&pid).unwrap();
-                                let handle_key =
-                                    instance.exports.get_function("handle_key").unwrap();
+                        if let PluginInputType::Event(event) = input_type {
+                            for (instance, plugin_env) in plugin_map.values() {
+                                if !plugin_env.events.contains(&event) {
+                                    continue;
+                                }
+                                let handle_key = instance
+                                    .exports
+                                    .get_function(handler_map.get(&event).unwrap())
+                                    .unwrap();
                                 for key in input_bytes.keys().flatten() {
                                     let key = cast_termion_key(key);
                                     wasi_write_string(
@@ -601,45 +611,9 @@ pub fn start(mut os_input: Box<dyn OsApi>, opts: CliArgs) {
                                     handle_key.call(&[]).unwrap();
                                 }
                             }
-                            PluginInputType::Event(event) => {
-                                for (instance, plugin_env) in plugin_map.values() {
-                                    if !plugin_env.events.contains(&event) {
-                                        continue;
-                                    }
-                                    let handle_key = instance
-                                        .exports
-                                        .get_function(handler_map.get(&event).unwrap())
-                                        .unwrap();
-                                    for key in input_bytes.keys().flatten() {
-                                        let key = cast_termion_key(key);
-                                        wasi_write_string(
-                                            &plugin_env.wasi_env,
-                                            &serde_json::to_string(&key).unwrap(),
-                                        );
-                                        handle_key.call(&[]).unwrap();
-                                    }
-                                }
-                            }
                         }
                         drop(send_screen_instructions.send(ScreenInstruction::Render));
                     }
-                    PluginInstruction::GlobalInput(input_bytes) => {
-                        // FIXME: Set up an event subscription system, and timed callbacks
-                        for (instance, plugin_env) in plugin_map.values() {
-                            let handler =
-                                instance.exports.get_function("handle_global_key").unwrap();
-                            for key in input_bytes.keys().flatten() {
-                                let key = cast_termion_key(key);
-                                wasi_write_string(
-                                    &plugin_env.wasi_env,
-                                    &serde_json::to_string(&key).unwrap(),
-                                );
-                                handler.call(&[]).unwrap();
-                            }
-                        }
-
-                        drop(send_screen_instructions.send(ScreenInstruction::Render));
-                    }
                     PluginInstruction::Unload(pid) => drop(plugin_map.remove(&pid)),
                     PluginInstruction::Quit => break,
                 }
diff --git a/src/common/wasm_vm.rs b/src/common/wasm_vm.rs
index 2f2a0cf6..24b947d6 100644
--- a/src/common/wasm_vm.rs
+++ b/src/common/wasm_vm.rs
@@ -30,10 +30,9 @@ pub enum PluginInputType {
 #[derive(Clone, Debug)]
 pub enum PluginInstruction {
     Load(Sender<u32>, PathBuf, Vec<NaughtyEventType>),
-    Update(Event),
+    Update(Option<u32>, Event), // Focused plugin / broadcast, event data
     Render(Sender<String>, u32, usize, usize), // String buffer, plugin id, rows, cols
-    Input(PluginInputType, Vec<u8>),           // plugin id, input bytes
-    GlobalInput(Vec<u8>),                      // input bytes
+    Input(PluginInputType, Vec<u8>), // plugin id, input bytes
     Unload(u32),
     UpdateTabs(Vec<TabInfo>), // num tabs, active tab
     Quit,
diff --git a/zellij-tile/src/data.rs b/zellij-tile/src/data.rs
index abca9994..a6e07983 100644
--- a/zellij-tile/src/data.rs
+++ b/zellij-tile/src/data.rs
@@ -1,5 +1,5 @@
 use serde::{Deserialize, Serialize};
-use strum_macros::{EnumDiscriminants, EnumIter, ToString};
+use strum_macros::{EnumDiscriminants, EnumIter, EnumString, ToString};
 
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash, Serialize, Deserialize)]
 pub enum Key {
@@ -24,7 +24,7 @@ pub enum Key {
 }
 
 #[derive(Debug, Clone, EnumDiscriminants, ToString, Serialize, Deserialize)]
-#[strum_discriminants(derive(Hash, Serialize, Deserialize))]
+#[strum_discriminants(derive(EnumString, Hash, Serialize, Deserialize))]
 #[strum_discriminants(name(EventType))]
 pub enum Event {
     ModeUpdate(Help), // FIXME: Rename the `Help` struct
diff --git a/zellij-tile/src/lib.rs b/zellij-tile/src/lib.rs
index eb1b08fb..771edb2d 100644
--- a/zellij-tile/src/lib.rs
+++ b/zellij-tile/src/lib.rs
@@ -10,8 +10,6 @@ pub trait ZellijTile {
     fn update(&mut self, event: Event) {}
     fn render(&mut self, rows: usize, cols: usize) {}
     // FIXME: Everything below this line should be purged
-    fn handle_key(&mut self, key: Key) {}
-    fn handle_global_key(&mut self, key: Key) {}
     fn update_tabs(&mut self) {}
     fn handle_tab_rename_keypress(&mut self, key: Key) {}
 }
@@ -46,22 +44,6 @@ macro_rules! register_tile {
         }
 
         #[no_mangle]
-        pub fn handle_key() {
-            STATE.with(|state| {
-                state.borrow_mut().handle_key($crate::shim::get_key());
-            });
-        }
-
-        #[no_mangle]
-        pub fn handle_global_key() {
-            STATE.with(|state| {
-                state
-                    .borrow_mut()
-                    .handle_global_key($crate::shim::get_key());
-            });
-        }
-
-        #[no_mangle]
         pub fn update_tabs() {
             STATE.with(|state| {
                 state.borrow_mut().update_tabs();