Add Option for Simplified Layout

* the simplified layout omits the Nerdfonts characters that are not
  found in every Fontset

* add an optional config option to opt into the simplified ui
  `simplified_ui: bool`

* add a config flag that allows opting into the simplified ui
  `zellij options --simplified-ui`

* move the `clean` flag to the `setup` subcommand

5 files changed, 37 insertions, 9 deletions

diff --git a/src/common/input/config.rs b/src/common/input/config.rs
index 3263b571..019d1c4c 100644
--- a/src/common/input/config.rs
+++ b/src/common/input/config.rs
@@ -6,10 +6,11 @@ use std::io::{self, Read};
 use std::path::{Path, PathBuf};
 
 use super::keybinds::{Keybinds, KeybindsFromYaml};
+use super::options::Options;
 use crate::cli::{CliArgs, ConfigCli};
 use crate::common::setup;
 
-use serde::Deserialize;
+use serde::{Deserialize, Serialize};
 use std::convert::TryFrom;
 
 const DEFAULT_CONFIG_FILE_NAME: &str = "config.yaml";
@@ -19,13 +20,16 @@ type ConfigResult = Result<Config, ConfigError>;
 /// Intermediate deserialization config struct
 #[derive(Debug, Deserialize)]
 pub struct ConfigFromYaml {
+    #[serde(flatten)]
+    pub options: Option<Options>,
     pub keybinds: Option<KeybindsFromYaml>,
 }
 
 /// Main configuration.
-#[derive(Debug, Clone, PartialEq)]
+#[derive(Debug, Clone, PartialEq, Deserialize, Serialize)]
 pub struct Config {
     pub keybinds: Keybinds,
+    pub options: Options,
 }
 
 #[derive(Debug)]
@@ -43,7 +47,8 @@ pub enum ConfigError {
 impl Default for Config {
     fn default() -> Self {
         let keybinds = Keybinds::default();
-        Config { keybinds }
+        let options = Options::default();
+        Config { keybinds, options }
     }
 }
 
@@ -55,7 +60,7 @@ impl TryFrom<&CliArgs> for Config {
             return Config::new(&path);
         }
 
-        if let Some(ConfigCli::Config { clean, .. }) = opts.option {
+        if let Some(ConfigCli::Setup { clean, .. }) = opts.option {
             if clean {
                 return Config::from_default_assets();
             }
@@ -84,7 +89,8 @@ impl Config {
     pub fn from_yaml(yaml_config: &str) -> ConfigResult {
         let config_from_yaml: ConfigFromYaml = serde_yaml::from_str(&yaml_config)?;
         let keybinds = Keybinds::get_default_keybinds_with_config(config_from_yaml.keybinds);
-        Ok(Config { keybinds })
+        let options = Options::from_yaml(config_from_yaml.options);
+        Ok(Config { keybinds, options })
     }
 
     /// Deserializes from given path.
diff --git a/src/common/input/handler.rs b/src/common/input/handler.rs
index a4293220..6238a3ee 100644
--- a/src/common/input/handler.rs
+++ b/src/common/input/handler.rs
@@ -11,7 +11,7 @@ use crate::server::ServerInstruction;
 use crate::CommandIsExecuting;
 
 use termion::input::{TermRead, TermReadEventsAndRaw};
-use zellij_tile::data::{InputMode, Key, ModeInfo, Palette};
+use zellij_tile::data::{InputMode, Key, ModeInfo, Palette, PluginCapabilities};
 
 /// Handles the dispatching of [`Action`]s according to the current
 /// [`InputMode`], and keep tracks of the current [`InputMode`].
@@ -148,6 +148,7 @@ impl InputHandler {
 // TODO this should probably be automatically generated in some way
 pub fn get_mode_info(mode: InputMode, palette: Palette) -> ModeInfo {
     let mut keybinds: Vec<(String, String)> = vec![];
+    let capabilities = PluginCapabilities { arrow_fonts: true };
     match mode {
         InputMode::Normal | InputMode::Locked => {}
         InputMode::Resize => {
@@ -181,6 +182,7 @@ pub fn get_mode_info(mode: InputMode, palette: Palette) -> ModeInfo {
         mode,
         keybinds,
         palette,
+        capabilities,
     }
 }
 
diff --git a/src/common/input/keybinds.rs b/src/common/input/keybinds.rs
index 823ca264..8bef47fd 100644
--- a/src/common/input/keybinds.rs
+++ b/src/common/input/keybinds.rs
@@ -4,14 +4,14 @@ use std::collections::HashMap;
 use super::actions::Action;
 use super::config;
 
-use serde::Deserialize;
+use serde::{Deserialize, Serialize};
 use strum::IntoEnumIterator;
 use zellij_tile::data::*;
 
 /// Used in the config struct
-#[derive(Clone, Debug, PartialEq)]
+#[derive(Clone, Debug, PartialEq, Deserialize, Serialize)]
 pub struct Keybinds(HashMap<InputMode, ModeKeybinds>);
-#[derive(Clone, Debug, Default, PartialEq)]
+#[derive(Clone, Debug, PartialEq, Deserialize, Serialize)]
 pub struct ModeKeybinds(HashMap<Key, Vec<Action>>);
 
 /// Intermediate struct used for deserialisation
diff --git a/src/common/input/mod.rs b/src/common/input/mod.rs
index 6589cac2..f30ccf23 100644
--- a/src/common/input/mod.rs
+++ b/src/common/input/mod.rs
@@ -4,3 +4,4 @@ pub mod actions;
 pub mod config;
 pub mod handler;
 pub mod keybinds;
+pub mod options;
diff --git a/src/common/input/options.rs b/src/common/input/options.rs
new file mode 100644
index 00000000..4c2dd861
--- /dev/null
+++ b/src/common/input/options.rs
@@ -0,0 +1,19 @@
+use serde::{Deserialize, Serialize};
+
+#[derive(Clone, Default, Debug, PartialEq, Deserialize, Serialize)]
+/// Options that can be set either through the config file,
+/// or cli flags
+pub struct Options {
+    /// Allow plugins to use a more compatible font type
+    pub simplified_ui: bool,
+}
+
+impl Options {
+    pub fn from_yaml(from_yaml: Option<Options>) -> Options {
+        if let Some(opts) = from_yaml {
+            opts
+        } else {
+            Options::default()
+        }
+    }
+}