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// Copyright 2016 Joe Wilm, The Alacritty Project Contributors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
//! Handle input from glutin
//!
//! Certain key combinations should send some escape sequence back to the pty.
//! In order to figure that out, state about which modifier keys are pressed
//! needs to be tracked. Additionally, we need a bit of a state machine to
//! determine what to do when a non-modifier key is pressed.
use std::mem;
use copypasta::{Clipboard, Load, Store};
use glutin::{ElementState, VirtualKeyCode, MouseButton};
use glutin::{Mods, mods};
use glutin::{TouchPhase, MouseScrollDelta};
use event::{Mouse, Notify};
use index::{Line, Column, Side, Point};
use selection::Selection;
use term::mode::{self, TermMode};
use term::{self, Term};
use util::fmt::Red;
/// Processes input from glutin.
///
/// An escape sequence may be emitted in case specific keys or key combinations
/// are activated.
///
/// TODO also need terminal state when processing input
pub struct Processor<'a, N: 'a> {
pub key_bindings: &'a [KeyBinding],
pub mouse_bindings: &'a [MouseBinding],
pub ctx: ActionContext<'a, N>,
}
pub struct ActionContext<'a, N: 'a> {
pub notifier: &'a mut N,
pub terminal: &'a mut Term,
pub selection: &'a mut Selection,
pub mouse: &'a mut Mouse,
pub size_info: &'a term::SizeInfo,
}
/// Describes a state and action to take in that state
///
/// This is the shared component of `MouseBinding` and `KeyBinding`
#[derive(Debug, Clone)]
pub struct Binding<T> {
/// Modifier keys required to activate binding
pub mods: Mods,
/// String to send to pty if mods and mode match
pub action: Action,
/// Terminal mode required to activate binding
pub mode: TermMode,
/// excluded terminal modes where the binding won't be activated
pub notmode: TermMode,
/// This property is used as part of the trigger detection code.
///
/// For example, this might be a key like "G", or a mouse button.
pub trigger: T,
}
/// Bindings that are triggered by a keyboard key
pub type KeyBinding = Binding<VirtualKeyCode>;
/// Bindings that are triggered by a mouse button
pub type MouseBinding = Binding<MouseButton>;
impl<T: Eq> Binding<T> {
#[inline]
fn is_triggered_by(
&self,
mode: &TermMode,
mods: &Mods,
input: &T
) -> bool {
// Check input first since bindings are stored in one big list. This is
// the most likely item to fail so prioritizing it here allows more
// checks to be short circuited.
self.trigger == *input &&
self.mode_matches(mode) &&
self.not_mode_matches(mode) &&
self.mods_match(mods)
}
}
impl<T> Binding<T> {
/// Execute the action associate with this binding
#[inline]
fn execute<'a, N: Notify>(&self, ctx: &mut ActionContext<'a, N>) {
self.action.execute(ctx)
}
#[inline]
fn mode_matches(&self, mode: &TermMode) -> bool {
self.mode.is_empty() || mode.intersects(self.mode)
}
#[inline]
fn not_mode_matches(&self, mode: &TermMode) -> bool {
self.notmode.is_empty() || !mode.intersects(self.notmode)
}
#[inline]
fn mods_match(&self, mods: &Mods) -> bool {
self.mods.is_all() || *mods == self.mods
}
}
#[derive(Debug, Clone)]
pub enum Action {
/// Write an escape sequence
Esc(String),
/// Paste contents of system clipboard
Paste,
// Store current selection into clipboard
Copy,
/// Paste contents of selection buffer
PasteSelection,
}
impl Action {
#[inline]
fn execute<'a, N: Notify>(&self, ctx: &mut ActionContext<'a, N>) {
match *self {
Action::Esc(ref s) => {
ctx.notifier.notify(s.clone().into_bytes())
},
Action::Copy => {
if let Some(selection) = ctx.selection.span() {
let buf = ctx.terminal.string_from_selection(&selection);
if !buf.is_empty() {
Clipboard::new()
.and_then(|mut clipboard| clipboard.store_primary(buf))
.unwrap_or_else(|err| {
err_println!("Error storing selection to clipboard. {}", Red(err));
});
}
}
},
Action::Paste |
Action::PasteSelection => {
Clipboard::new()
.and_then(|clipboard| clipboard.load_selection())
.map(|contents| {
if ctx.terminal.mode().contains(mode::BRACKETED_PASTE) {
ctx.notifier.notify(&b"\x1b[200~"[..]);
ctx.notifier.notify(contents.into_bytes());
ctx.notifier.notify(&b"\x1b[201~"[..]);
} else {
ctx.notifier.notify(contents.into_bytes());
}
})
.unwrap_or_else(|err| {
err_println!("Error loading data from clipboard. {}", Red(err));
});
},
}
}
}
impl From<&'static str> for Action {
fn from(s: &'static str) -> Action {
Action::Esc(s.into())
}
}
impl<'a, N: Notify + 'a> Processor<'a, N> {
#[inline]
pub fn mouse_moved(&mut self, x: u32, y: u32) {
self.ctx.mouse.x = x;
self.ctx.mouse.y = y;
if let Some(point) = self.ctx.size_info.pixels_to_coords(x as usize, y as usize) {
let prev_line = mem::replace(&mut self.ctx.mouse.line, point.line);
let prev_col = mem::replace(&mut self.ctx.mouse.column, point.col);
let cell_x = x as usize % self.ctx.size_info.cell_width as usize;
let half_cell_width = (self.ctx.size_info.cell_width / 2.0) as usize;
self.ctx.mouse.cell_side = if cell_x > half_cell_width {
Side::Right
} else {
Side::Left
};
if self.ctx.mouse.left_button_state == ElementState::Pressed {
let report_mode = mode::MOUSE_REPORT_CLICK | mode::MOUSE_MOTION;
if !self.ctx.terminal.mode().intersects(report_mode) {
self.ctx.selection.update(Point {
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