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use serde_derive::Deserialize;
use std::collections::{hash_map::Entry, HashMap};
use std::convert::From;
use std::str::FromStr;
use termion::event::Event;
use crate::config::{parse_config_or_default, TomlConfigFile};
use crate::error::JoshutoResult;
use crate::key_command::{AppCommand, Command, CommandKeybind};
use crate::traits::ToString;
use crate::util::keyparse::str_to_event;
use super::DEFAULT_CONFIG_FILE_PATH;
enum KeymapError {
Conflict,
}
#[derive(Clone, Debug, Deserialize)]
struct CommandKeymap {
pub command: String,
pub description: Option<String>,
pub keys: Vec<String>,
}
#[derive(Clone, Debug, Deserialize)]
struct AppModeKeyMapping {
#[serde(default)]
pub keymap: Vec<CommandKeymap>,
}
#[derive(Clone, Debug, Deserialize)]
struct AppKeyMappingRaw {
pub default_view: AppModeKeyMapping,
pub task_view: AppModeKeyMapping,
pub help_view: AppModeKeyMapping,
}
pub type KeyMapping = HashMap<Event, CommandKeybind>;
#[derive(Debug)]
pub struct AppKeyMapping {
pub default_view: KeyMapping,
pub task_view: KeyMapping,
pub help_view: KeyMapping,
}
impl AppKeyMapping {
pub fn new() -> Self {
Self {
default_view: KeyMapping::new(),
task_view: KeyMapping::new(),
help_view: KeyMapping::new(),
}
}
pub fn default_res() -> JoshutoResult<Self> {
let crude: AppKeyMappingRaw = toml::from_str(DEFAULT_CONFIG_FILE_PATH)?;
let keymapping: Self = Self::from(crude);
Ok(keymapping)
}
}
fn vec_to_map(vec: &[CommandKeymap]) -> HashMap<Event, CommandKeybind> {
let mut hashmap = HashMap::new();
for m in vec {
match Command::from_str(m.command.as_str()) {
Ok(command) => {
let events: Vec<Event> = m
.keys
.iter()
.filter_map(|s| str_to_event(s.as_str()))
.collect();
if events.len() != m.keys.len() {
eprintln!("Failed to parse events: {:?}", m.keys);
continue;
}
let command_str = command.command();
let command_description = m.description.to_owned();
let result = insert_keycommand(&mut hashmap, command, command_description, &events);
match result {
Ok(_) => {}
Err(e) => match e {
KeymapError::Conflict => {
let events_str: Vec<String> =
events.iter().map(|e| e.to_string()).collect();
eprintln!("Error: Ambiguous Keymapping: Multiple commands mapped to key sequence {:?} {}", events_str, command_str);
}
},
}
}
Err(e) => eprintln!("Keymap error: {}", e),
}
}
hashmap
}
impl From<AppKeyMappingRaw> for AppKeyMapping {
fn from(raw: AppKeyMappingRaw) -> Self {
let mut keymaps = Self::new();
keymaps.default_view = vec_to_map(&raw.default_view.keymap);
keymaps.task_view = vec_to_map(&raw.task_view.keymap);
keymaps.help_view = vec_to_map(&raw.help_view.keymap);
keymaps
}
}
impl TomlConfigFile for AppKeyMapping {
fn get_config(file_name: &str) -> Self {
parse_config_or_default::<AppKeyMappingRaw, AppKeyMapping>(file_name)
}
}
impl std::default::Default for AppKeyMapping {
fn default() -> Self {
// This should not fail.
// If it fails then there is a (syntax) error in the default config file
AppKeyMapping::default_res().unwrap()
}
}
fn insert_keycommand(
keymap: &mut KeyMapping,
keycommand: Command,
description: Option<String>,
events: &[Event],
) -> Result<(), KeymapError> {
let num_events = events.len();
if num_events == 0 {
return Ok(());
}
let event = events[0].clone();
if num_events == 1 {
match keymap.entry(event) {
Entry::Occupied(_) => return Err(KeymapError::Conflict),
Entry::Vacant(entry) => entry.insert(CommandKeybind::SimpleKeybind {
command: keycommand,
description,
}),
};
return Ok(());
}
match keymap.entry(event) {
Entry::Occupied(mut entry) => match entry.get_mut() {
CommandKeybind::CompositeKeybind(ref mut m) => {
insert_keycommand(m, keycommand, description, &events[1..])
}
_ => Err(KeymapError::Conflict),
},
Entry::Vacant(entry) => {
let mut new_map = KeyMapping::new();
let result = insert_keycommand(&mut new_map, keycommand, description, &events[1..]);
if result.is_ok() {
let composite_command = CommandKeybind::CompositeKeybind(new_map);
entry.insert(composite_command);
}
result
}
}
}
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