2016-06-30 03:56:12 +00:00
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// Copyright 2016 Joe Wilm, The Alacritty Project Contributors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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2016-06-23 16:48:31 +00:00
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//! Handle input from glutin
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//!
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//! Certain key combinations should send some escape sequence back to the pty.
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//! In order to figure that out, state about which modifier keys are pressed
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//! needs to be tracked. Additionally, we need a bit of a state machine to
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//! determine what to do when a non-modifier key is pressed.
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//!
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//! TODO would be nice to generalize this so it could work with other windowing
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//! APIs
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//!
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//! TODO handling xmodmap would be good
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2016-07-02 15:32:28 +00:00
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use std::io::Write;
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2016-06-23 16:48:31 +00:00
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use glutin::{ElementState, VirtualKeyCode};
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use term::mode::{self, TermMode};
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/// Modifier keys
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///
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/// Contains a bitflags for modifier keys which are now namespaced thanks to
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/// this module wrapper.
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mod modifier {
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use glutin::ElementState;
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bitflags! {
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/// Flags indicating active modifier keys
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pub flags Keys: u8 {
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/// Left shift
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const SHIFT_LEFT = 0b00000001,
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/// Right shift
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const SHIFT_RIGHT = 0b00000010,
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/// Left meta
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const META_LEFT = 0b00000100,
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/// Right meta
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const META_RIGHT = 0b00001000,
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/// Left control
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const CONTROL_LEFT = 0b00010000,
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/// Right control
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const CONTROL_RIGHT = 0b00100000,
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/// Left alt
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const ALT_LEFT = 0b01000000,
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/// Right alt
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const ALT_RIGHT = 0b10000000,
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/// Any shift key
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const SHIFT = SHIFT_LEFT.bits
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| SHIFT_RIGHT.bits,
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/// Any control key
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const CONTROL = CONTROL_LEFT.bits
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| CONTROL_RIGHT.bits,
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/// Any alt key
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const ALT = ALT_LEFT.bits
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| ALT_RIGHT.bits,
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/// Any meta key
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const META = META_LEFT.bits
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| META_RIGHT.bits,
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/// Any mod
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const ANY = 0b11111111,
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/// No mod
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const NONE = 0b00000000,
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}
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}
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impl Default for Keys {
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fn default() -> Keys {
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Keys::empty()
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}
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}
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impl Keys {
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/// Take appropriate action given a modifier key and its state
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#[inline]
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pub fn update(&mut self, state: ElementState, key: Keys) {
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match state {
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ElementState::Pressed => self.insert(key),
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ElementState::Released => self.remove(key),
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}
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}
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}
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}
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/// Processes input from glutin.
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///
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/// An escape sequence may be emitted in case specific keys or key combinations
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/// are activated.
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///
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/// TODO also need terminal state when processing input
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#[derive(Default)]
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pub struct Processor {
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/// Active modifier keys
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mods: modifier::Keys,
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}
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/// Types that are notified of escape sequences from the input::Processor.
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pub trait Notify {
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/// Notify that an escape sequence should be written to the pty
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fn notify(&mut self, &str);
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}
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2016-07-02 15:32:28 +00:00
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/// A notifier type that simply writes bytes to the provided `Write` type
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pub struct WriteNotifier<'a, W: Write + 'a>(pub &'a mut W);
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impl<'a, W: Write> Notify for WriteNotifier<'a, W> {
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fn notify(&mut self, message: &str) {
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2016-07-30 01:26:51 +00:00
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self.0.write_all(message.as_bytes()).unwrap();
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2016-07-02 15:32:28 +00:00
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}
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}
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2016-06-23 16:48:31 +00:00
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/// Describes a key combination that should emit a control sequence
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///
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/// The actual triggering key is omitted here since bindings are grouped by the trigger key.
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#[derive(Debug)]
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pub struct Binding {
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/// Modifier keys required to activate binding
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mods: modifier::Keys,
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/// String to send to pty if mods and mode match
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send: &'static str,
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/// Terminal mode required to activate binding
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mode: TermMode,
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/// excluded terminal modes where the binding won't be activated
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notmode: TermMode,
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}
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/// Bindings for the LEFT key.
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static LEFT_BINDINGS: &'static [Binding] = &[
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Binding { mods: modifier::SHIFT, send: "\x1b[1;2D", mode: mode::ANY, notmode: mode::NONE },
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Binding { mods: modifier::CONTROL, send: "\x1b[1;5D", mode: mode::ANY, notmode: mode::NONE },
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Binding { mods: modifier::ALT, send: "\x1b[1;3D", mode: mode::ANY, notmode: mode::NONE },
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Binding { mods: modifier::ANY, send: "\x1b[D", mode: mode::ANY, notmode: mode::APP_CURSOR },
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Binding { mods: modifier::ANY, send: "\x1bOD", mode: mode::APP_CURSOR, notmode: mode::NONE },
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];
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/// Bindings for the RIGHT key
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static RIGHT_BINDINGS: &'static [Binding] = &[
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Binding { mods: modifier::SHIFT, send: "\x1b[1;2C", mode: mode::ANY, notmode: mode::NONE },
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Binding { mods: modifier::CONTROL, send: "\x1b[1;5C", mode: mode::ANY, notmode: mode::NONE },
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Binding { mods: modifier::ALT, send: "\x1b[1;3C", mode: mode::ANY, notmode: mode::NONE },
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Binding { mods: modifier::ANY, send: "\x1b[C", mode: mode::ANY, notmode: mode::APP_CURSOR },
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Binding { mods: modifier::ANY, send: "\x1bOC", mode: mode::APP_CURSOR, notmode: mode::NONE },
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];
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/// Bindings for the UP key
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static UP_BINDINGS: &'static [Binding] = &[
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Binding { mods: modifier::SHIFT, send: "\x1b[1;2A", mode: mode::ANY, notmode: mode::NONE },
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Binding { mods: modifier::CONTROL, send: "\x1b[1;5A", mode: mode::ANY, notmode: mode::NONE },
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Binding { mods: modifier::ALT, send: "\x1b[1;3A", mode: mode::ANY, notmode: mode::NONE },
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Binding { mods: modifier::ANY, send: "\x1b[A", mode: mode::ANY, notmode: mode::APP_CURSOR },
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Binding { mods: modifier::ANY, send: "\x1bOA", mode: mode::APP_CURSOR, notmode: mode::NONE },
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];
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/// Bindings for the DOWN key
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static DOWN_BINDINGS: &'static [Binding] = &[
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Binding { mods: modifier::SHIFT, send: "\x1b[1;2B", mode: mode::ANY, notmode: mode::NONE },
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Binding { mods: modifier::CONTROL, send: "\x1b[1;5B", mode: mode::ANY, notmode: mode::NONE },
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Binding { mods: modifier::ALT, send: "\x1b[1;3B", mode: mode::ANY, notmode: mode::NONE },
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Binding { mods: modifier::ANY, send: "\x1b[B", mode: mode::ANY, notmode: mode::APP_CURSOR },
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Binding { mods: modifier::ANY, send: "\x1bOB", mode: mode::APP_CURSOR, notmode: mode::NONE },
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];
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2016-06-24 04:24:08 +00:00
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/// Bindings for the F1 key
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static F1_BINDINGS: &'static [Binding] = &[
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Binding { mods: modifier::ANY, send: "\x1bOP", mode: mode::ANY, notmode: mode::NONE },
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];
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/// Bindings for the F2 key
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static F2_BINDINGS: &'static [Binding] = &[
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Binding { mods: modifier::ANY, send: "\x1bOQ", mode: mode::ANY, notmode: mode::NONE },
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];
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/// Bindings for the F3 key
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static F3_BINDINGS: &'static [Binding] = &[
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Binding { mods: modifier::ANY, send: "\x1bOR", mode: mode::ANY, notmode: mode::NONE },
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];
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/// Bindings for the F4 key
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static F4_BINDINGS: &'static [Binding] = &[
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Binding { mods: modifier::ANY, send: "\x1bOS", mode: mode::ANY, notmode: mode::NONE },
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];
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/// Bindings for the F5 key
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static F5_BINDINGS: &'static [Binding] = &[
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Binding { mods: modifier::ANY, send: "\x1b[15~", mode: mode::ANY, notmode: mode::NONE },
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];
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/// Bindings for the F6 key
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static F6_BINDINGS: &'static [Binding] = &[
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Binding { mods: modifier::ANY, send: "\x1b[17~", mode: mode::ANY, notmode: mode::NONE },
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];
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/// Bindings for the F7 key
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static F7_BINDINGS: &'static [Binding] = &[
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Binding { mods: modifier::ANY, send: "\x1b[18~", mode: mode::ANY, notmode: mode::NONE },
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];
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/// Bindings for the F8 key
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static F8_BINDINGS: &'static [Binding] = &[
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Binding { mods: modifier::ANY, send: "\x1b[19~", mode: mode::ANY, notmode: mode::NONE },
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];
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/// Bindings for the F9 key
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static F9_BINDINGS: &'static [Binding] = &[
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Binding { mods: modifier::ANY, send: "\x1b[20~", mode: mode::ANY, notmode: mode::NONE },
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];
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/// Bindings for the F10 key
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static F10_BINDINGS: &'static [Binding] = &[
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Binding { mods: modifier::ANY, send: "\x1b[21~", mode: mode::ANY, notmode: mode::NONE },
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];
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/// Bindings for the F11 key
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static F11_BINDINGS: &'static [Binding] = &[
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Binding { mods: modifier::ANY, send: "\x1b[23~", mode: mode::ANY, notmode: mode::NONE },
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];
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/// Bindings for the F11 key
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static F12_BINDINGS: &'static [Binding] = &[
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Binding { mods: modifier::ANY, send: "\x1b[24~", mode: mode::ANY, notmode: mode::NONE },
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];
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2016-07-16 19:25:57 +00:00
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/// Bindings for the H key
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///
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/// Control-H sends 0x08 normally, but we capture that in ReceivedCharacter
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/// since DEL and BACKSPACE are inverted. This binding is a work around to that
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/// capture.
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static H_BINDINGS: &'static [Binding] = &[
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Binding { mods: modifier::CONTROL, send: "\x08", mode: mode::ANY, notmode: mode::NONE },
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];
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2016-07-04 16:24:51 +00:00
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/// Bindings for the Backspace key
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static BACKSPACE_BINDINGS: &'static [Binding] = &[
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Binding { mods: modifier::ANY, send: "\x7f", mode: mode::ANY, notmode: mode::NONE },
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];
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/// Bindings for the Delete key
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static DELETE_BINDINGS: &'static [Binding] = &[
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Binding { mods: modifier::ANY, send: "\x1b[3~", mode: mode::APP_KEYPAD, notmode: mode::NONE },
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Binding { mods: modifier::ANY, send: "\x1b[P", mode: mode::ANY, notmode: mode::APP_KEYPAD },
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];
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2016-06-23 16:48:31 +00:00
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// key mods escape appkey appcursor crlf
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//
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// notes: appkey = DECPAM (application keypad mode); not enabled is "normal keypad"
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// appcursor = DECCKM (application cursor mode);
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// crlf = LNM (Linefeed/new line); wtf is this
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impl Processor {
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pub fn new() -> Processor {
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Default::default()
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}
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pub fn process<N>(&mut self,
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state: ElementState,
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key: Option<VirtualKeyCode>,
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notifier: &mut N,
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mode: TermMode)
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where N: Notify
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{
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if let Some(key) = key {
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// Handle state updates
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match key {
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VirtualKeyCode::LAlt => self.mods.update(state, modifier::ALT_LEFT),
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VirtualKeyCode::RAlt => self.mods.update(state, modifier::ALT_RIGHT),
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VirtualKeyCode::LShift => self.mods.update(state, modifier::SHIFT_LEFT),
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VirtualKeyCode::RShift => self.mods.update(state, modifier::SHIFT_RIGHT),
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VirtualKeyCode::LControl => self.mods.update(state, modifier::CONTROL_LEFT),
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VirtualKeyCode::RControl => self.mods.update(state, modifier::CONTROL_RIGHT),
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VirtualKeyCode::LWin => self.mods.update(state, modifier::META_LEFT),
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VirtualKeyCode::RWin => self.mods.update(state, modifier::META_RIGHT),
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_ => ()
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}
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// Ignore release events
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if state == ElementState::Released {
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return;
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}
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let bindings = match key {
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2016-06-24 04:24:08 +00:00
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// Arrows
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2016-06-23 16:48:31 +00:00
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VirtualKeyCode::Left => LEFT_BINDINGS,
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VirtualKeyCode::Up => UP_BINDINGS,
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VirtualKeyCode::Down => DOWN_BINDINGS,
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VirtualKeyCode::Right => RIGHT_BINDINGS,
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2016-06-24 04:24:08 +00:00
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// Function keys
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VirtualKeyCode::F1 => F1_BINDINGS,
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VirtualKeyCode::F2 => F2_BINDINGS,
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VirtualKeyCode::F3 => F3_BINDINGS,
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VirtualKeyCode::F4 => F4_BINDINGS,
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VirtualKeyCode::F5 => F5_BINDINGS,
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VirtualKeyCode::F6 => F6_BINDINGS,
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VirtualKeyCode::F7 => F7_BINDINGS,
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VirtualKeyCode::F8 => F8_BINDINGS,
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VirtualKeyCode::F9 => F9_BINDINGS,
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VirtualKeyCode::F10 => F10_BINDINGS,
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VirtualKeyCode::F11 => F11_BINDINGS,
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VirtualKeyCode::F12 => F12_BINDINGS,
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2016-07-04 16:24:51 +00:00
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VirtualKeyCode::Back => BACKSPACE_BINDINGS,
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VirtualKeyCode::Delete => DELETE_BINDINGS,
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2016-07-16 19:25:57 +00:00
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VirtualKeyCode::H => H_BINDINGS,
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2016-06-23 16:48:31 +00:00
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// Mode keys ignored now
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VirtualKeyCode::LAlt | VirtualKeyCode::RAlt | VirtualKeyCode::LShift |
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VirtualKeyCode::RShift | VirtualKeyCode::LControl | VirtualKeyCode::RControl |
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VirtualKeyCode::LWin | VirtualKeyCode::RWin => return,
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// All of the alphanumeric keys get passed through here as well, but there's no work
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// to be done for them.
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VirtualKeyCode::A | VirtualKeyCode::B | VirtualKeyCode::C | VirtualKeyCode::D |
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2016-07-16 19:25:57 +00:00
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VirtualKeyCode::E | VirtualKeyCode::F | VirtualKeyCode::G |
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2016-06-23 16:48:31 +00:00
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VirtualKeyCode::I | VirtualKeyCode::J | VirtualKeyCode::K | VirtualKeyCode::L |
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VirtualKeyCode::M | VirtualKeyCode::N | VirtualKeyCode::O | VirtualKeyCode::P |
|
|
|
|
VirtualKeyCode::Q | VirtualKeyCode::R | VirtualKeyCode::S | VirtualKeyCode::T |
|
|
|
|
VirtualKeyCode::U | VirtualKeyCode::V | VirtualKeyCode::W | VirtualKeyCode::X |
|
|
|
|
VirtualKeyCode::Y | VirtualKeyCode::Z => return,
|
|
|
|
VirtualKeyCode::Key1 | VirtualKeyCode::Key2 | VirtualKeyCode::Key3 |
|
|
|
|
VirtualKeyCode::Key4 | VirtualKeyCode::Key5 | VirtualKeyCode::Key6 |
|
|
|
|
VirtualKeyCode::Key7 | VirtualKeyCode::Key8 | VirtualKeyCode::Key9 |
|
|
|
|
VirtualKeyCode::Key0 => return,
|
|
|
|
// Log something by default
|
|
|
|
_ => {
|
|
|
|
println!("Unhandled key: {:?}; state: {:?}; mods: {:?}",
|
|
|
|
key, state, self.mods);
|
|
|
|
return;
|
|
|
|
},
|
|
|
|
};
|
|
|
|
|
|
|
|
self.process_bindings(bindings, mode, notifier);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
fn process_bindings<N>(&self, bindings: &[Binding], mode: TermMode, notifier: &mut N)
|
|
|
|
where N: Notify
|
|
|
|
{
|
|
|
|
// Check each binding
|
|
|
|
for binding in bindings {
|
|
|
|
// TermMode positive
|
|
|
|
if binding.mode.is_all() || mode.intersects(binding.mode) {
|
|
|
|
// TermMode negative
|
|
|
|
if binding.notmode.is_empty() || !mode.intersects(binding.notmode) {
|
|
|
|
// Modifier keys
|
|
|
|
if binding.mods.is_all() || self.mods.intersects(binding.mods) {
|
|
|
|
// everything matches
|
|
|
|
notifier.notify(binding.send);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
#[cfg(test)]
|
|
|
|
mod tests {
|
|
|
|
use term::mode::{self, TermMode};
|
|
|
|
|
|
|
|
use super::Processor;
|
|
|
|
use super::modifier;
|
|
|
|
use super::Binding;
|
|
|
|
|
|
|
|
/// Receiver that keeps a copy of any strings it is notified with
|
|
|
|
#[derive(Default)]
|
|
|
|
struct Receiver {
|
|
|
|
pub got: Option<String>
|
|
|
|
}
|
|
|
|
|
|
|
|
impl super::Notify for Receiver {
|
|
|
|
fn notify(&mut self, s: &str) {
|
|
|
|
self.got = Some(String::from(s));
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
macro_rules! test_process_binding {
|
|
|
|
{
|
|
|
|
name: $name:ident,
|
|
|
|
binding: $binding:expr,
|
|
|
|
expect: $expect:expr,
|
|
|
|
mode: $mode:expr,
|
|
|
|
mods: $mods:expr
|
|
|
|
} => {
|
|
|
|
#[test]
|
|
|
|
fn $name() {
|
|
|
|
let bindings = &[$binding];
|
|
|
|
|
|
|
|
let mut processor = Processor::new();
|
|
|
|
processor.mods.insert($mods);
|
|
|
|
let mut receiver = Receiver::default();
|
|
|
|
|
|
|
|
processor.process_bindings(bindings, $mode, &mut receiver);
|
|
|
|
assert_eq!(receiver.got, $expect);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
test_process_binding! {
|
|
|
|
name: process_binding_nomode_shiftmod_require_shift,
|
|
|
|
binding: Binding { mods: modifier::SHIFT, send: "\x1b[1;2D", mode: mode::ANY, notmode: mode::NONE },
|
|
|
|
expect: Some(String::from("\x1b[1;2D")),
|
|
|
|
mode: mode::NONE,
|
|
|
|
mods: modifier::SHIFT
|
|
|
|
}
|
|
|
|
|
|
|
|
test_process_binding! {
|
|
|
|
name: process_binding_nomode_nomod_require_shift,
|
|
|
|
binding: Binding { mods: modifier::SHIFT, send: "\x1b[1;2D", mode: mode::ANY, notmode: mode::NONE },
|
|
|
|
expect: None,
|
|
|
|
mode: mode::NONE,
|
|
|
|
mods: modifier::NONE
|
|
|
|
}
|
|
|
|
|
|
|
|
test_process_binding! {
|
|
|
|
name: process_binding_nomode_controlmod,
|
|
|
|
binding: Binding { mods: modifier::CONTROL, send: "\x1b[1;5D", mode: mode::ANY, notmode: mode::NONE },
|
|
|
|
expect: Some(String::from("\x1b[1;5D")),
|
|
|
|
mode: mode::NONE,
|
|
|
|
mods: modifier::CONTROL
|
|
|
|
}
|
|
|
|
|
|
|
|
test_process_binding! {
|
|
|
|
name: process_binding_nomode_nomod_require_not_appcursor,
|
|
|
|
binding: Binding { mods: modifier::ANY, send: "\x1b[D", mode: mode::ANY, notmode: mode::APP_CURSOR },
|
|
|
|
expect: Some(String::from("\x1b[D")),
|
|
|
|
mode: mode::NONE,
|
|
|
|
mods: modifier::NONE
|
|
|
|
}
|
|
|
|
|
|
|
|
test_process_binding! {
|
|
|
|
name: process_binding_appcursormode_nomod_require_appcursor,
|
|
|
|
binding: Binding { mods: modifier::ANY, send: "\x1bOD", mode: mode::APP_CURSOR, notmode: mode::NONE },
|
|
|
|
expect: Some(String::from("\x1bOD")),
|
|
|
|
mode: mode::APP_CURSOR,
|
|
|
|
mods: modifier::NONE
|
|
|
|
}
|
|
|
|
|
|
|
|
test_process_binding! {
|
|
|
|
name: process_binding_nomode_nomod_require_appcursor,
|
|
|
|
binding: Binding { mods: modifier::ANY, send: "\x1bOD", mode: mode::APP_CURSOR, notmode: mode::NONE },
|
|
|
|
expect: None,
|
|
|
|
mode: mode::NONE,
|
|
|
|
mods: modifier::NONE
|
|
|
|
}
|
|
|
|
}
|