Signed-off-by: Michael Richters <gedankenexperimenter@gmail.com>pull/1040/head
Michael Richters
3 years ago
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# CharShift
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CharShift allows you to independently assign symbols to shifted and unshifted
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positions of keymap entries. Either or both symbols can be ones that normally
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requires the `shift` modifier, and either or both symbols can be ones normally
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produced without it.
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For example you can configure your keyboard so that a single key produces `,`
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when pressed unshifted, but `;` when pressed with `shift` held. Or `(`
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unshifted, and `[` shifted. Or `+`/`*` — all without changing your OS keyboard
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layout.
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## Using the plugin
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Using the plugin with its defaults is as simple as including the header, and
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enabling the plugin:
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```c++
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#include <Kaleidoscope.h>
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#include <Kaleidoscope-CharShift.h>
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KALEIDOSCOPE_INIT_PLUGINS(CharShift);
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```
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Further configuration is required, of course; see below.
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Note: CharShift should be registered in `KALEIDOSCOPE_INIT_PLUGINS()` after any
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plugin that changes the event's `Key` value to that of an CharShift key.
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## Configuring CharShift keys
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To use CharShift, we must first define `KeyPair` objects, which can then be
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referenced by entries in the keymap. This is easiest to do by using the
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`UNKEYS()` preprocessor macro in the sketch's `setup()` function, as follows:
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```c++
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void setup() {
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Kaleidoscope.setup();
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UNKEYS(
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kaleidoscope::plugin::KeyPair(Key_Comma, Key_Semicolon), // `,`/`;`
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kaleidoscope::plugin::KeyPair(Key_Period, LSHIFT(Key_Semicolon)), // `.`/`:`
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kaleidoscope::plugin::KeyPair(LSHIFT(Key_9), Key_LeftBracket), // `(`/`[`
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kaleidoscope::plugin::KeyPair(LSHIFT(Key_Comma), LSHIFT(Key_LeftBracket)), // `<`/`{`
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);
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}
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```
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The first argument to the `KeyPair()` constructor is the value for when the key is
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pressed without `shift` held, the second is what you'll get if a `shift`
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modifier is being held when the key toggles on. If that second ("upper") value
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doesn't have the `shift` modifier flag (i.e. `LSHIFT()`) applied to it, the held
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`shift` modifier will be suppressed when the key is pressed, allowing the
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"unshifted" symbol to be produced.
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These `KeyPair`s can be referred to in the sketch's keymap by using the `UK()`
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preprocessor macro, which takes an integer argument, referring to items in the
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`UNKEYS()` array, starting with zero. With the example above, an entry of
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`UK(2)` will output `(` when pressed without `shift`, and `[` if `shift` is
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being held.
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## Further reading
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Starting from the [example][plugin:example] is the recommended way of getting
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started with the plugin.
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[plugin:example]: /examples/Keystrokes/CharShift/CharShift.ino
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name=Kaleidoscope-CharShift
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version=0.0.0
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sentence=Independent assignment of symbols to keys based on shift state
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maintainer=Kaleidoscope's Developers <jesse@keyboard.io>
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url=https://github.com/keyboardio/Kaleidoscope
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author=Michael Richters <gedankenexperimenter@gmail.com>
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paragraph=
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@ -0,0 +1,20 @@
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/* -*- mode: c++ -*-
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* Kaleidoscope-CharShift -- Independently assign shifted and unshifted symbols
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* Copyright (C) 2021 Keyboard.io, Inc
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*
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* This program is free software: you can redistribute it and/or modify it under
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* the terms of the GNU General Public License as published by the Free Software
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* Foundation, version 3.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include <kaleidoscope/plugin/CharShift.h>
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/* -*- mode: c++ -*-
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* Kaleidoscope-CharShift -- Independently assign shifted and unshifted symbols
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* Copyright (C) 2021 Keyboard.io, Inc
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*
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* This program is free software: you can redistribute it and/or modify it under
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* the terms of the GNU General Public License as published by the Free Software
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* Foundation, version 3.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "kaleidoscope/plugin/CharShift.h"
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#include <Kaleidoscope-Ranges.h>
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#include <Kaleidoscope-FocusSerial.h>
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#include "kaleidoscope/KeyAddr.h"
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#include "kaleidoscope/key_defs.h"
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#include "kaleidoscope/KeyEvent.h"
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#include "kaleidoscope/keyswitch_state.h"
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#include "kaleidoscope/progmem_helpers.h"
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#include "kaleidoscope/Runtime.h"
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namespace kaleidoscope {
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namespace plugin {
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// =============================================================================
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// CharShift class variables
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CharShift::KeyPair const * CharShift::progmem_keypairs_{nullptr};
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uint8_t CharShift::num_keypairs_{0};
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bool CharShift::reverse_shift_state_{false};
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// =============================================================================
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// Event handlers
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// -----------------------------------------------------------------------------
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EventHandlerResult CharShift::onNameQuery() {
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return ::Focus.sendName(F("CharShift"));
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}
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// -----------------------------------------------------------------------------
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EventHandlerResult CharShift::onKeyEvent(KeyEvent &event) {
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// If the event is for anything other than an CharShift key, we ignore it.
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if (!isCharShiftKey(event.key)) {
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// If this event is for a Keyboard key, we need to stop
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// `beforeReportingState()` from suppressing `shift` keys.
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if (event.key.isKeyboardKey())
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reverse_shift_state_ = false;
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return EventHandlerResult::OK;
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}
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// Default to not suppressing `shift` modifiers.
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reverse_shift_state_ = false;
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// It shouldn't be possible for an CharShift key to toggle off, because it
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// will get replaced by on of its `KeyPair` values when it toggles on, but just
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// in case, we exit early if that happens.
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if (keyToggledOff(event.state))
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return EventHandlerResult::OK;
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// Next, we get the `KeyPair` values corresponding to the event key.
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KeyPair keypair = decodeCharShiftKey(event.key);
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// Determine if a shift key is being held.
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bool shift_held = false;
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for (Key key : live_keys.all()) {
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if (key.isKeyboardShift()) {
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shift_held = true;
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break;
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}
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}
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if (!shift_held) {
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// No shift key is held; just use the base value of the `KeyPair`.
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event.key = keypair.lower;
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} else {
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// At least one shift key is held; use the shifted value.
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event.key = keypair.upper;
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// Check for a shift modifier flag.
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if (event.key.isKeyboardKey() &&
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(event.key.getFlags() & SHIFT_HELD) == 0) {
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// The upper key doesn't have the `shift` modifier flag; we need to
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// suppress `shift` in `beforeReportingState()`.
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reverse_shift_state_ = true;
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}
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}
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return EventHandlerResult::OK;
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}
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// -----------------------------------------------------------------------------
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EventHandlerResult CharShift::beforeReportingState(const KeyEvent &event) {
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// If `onKeyEvent()` has signalled that `shift` should be suppressed, this is
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// the time to do it. We can't do it in `onKeyEvent()`, because the new
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// Keyboard HID report hasn't been prepared yet there.
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if (reverse_shift_state_) {
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Runtime.hid().keyboard().releaseKey(Key_LeftShift);
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Runtime.hid().keyboard().releaseKey(Key_RightShift);
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}
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return EventHandlerResult::OK;
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}
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// =============================================================================
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// Support functions
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bool CharShift::isCharShiftKey(Key key) {
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return (key >= ranges::CS_FIRST && key <= ranges::CS_LAST);
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}
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CharShift::KeyPair CharShift::decodeCharShiftKey(Key key) {
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uint8_t i = key.getRaw() - ranges::CS_FIRST;
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if (i < numKeyPairs()) {
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return readKeyPair(i);
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}
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return {Key_NoKey, Key_NoKey};
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}
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// This should be overridden if the KeyPairs array is stored in EEPROM
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__attribute__((weak))
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uint8_t CharShift::numKeyPairs() {
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return numProgmemKeyPairs();
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}
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// This should be overridden if the KeyPairs array is stored in EEPROM
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__attribute__((weak))
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CharShift::KeyPair CharShift::readKeyPair(uint8_t n) {
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return readKeyPairFromProgmem(n);
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}
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uint8_t CharShift::numProgmemKeyPairs() {
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return num_keypairs_;
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}
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CharShift::KeyPair CharShift::readKeyPairFromProgmem(uint8_t n) {
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return cloneFromProgmem(progmem_keypairs_[n]);
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}
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} // namespace plugin
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} // namespace kaleidoscope
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kaleidoscope::plugin::CharShift CharShift;
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@ -0,0 +1,137 @@
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/* -*- mode: c++ -*-
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* Kaleidoscope-CharShift -- Independently assign shifted and unshifted symbols
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* Copyright (C) 2021 Keyboard.io, Inc
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*
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* This program is free software: you can redistribute it and/or modify it under
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* the terms of the GNU General Public License as published by the Free Software
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* Foundation, version 3.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include "kaleidoscope/Runtime.h"
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#include <Kaleidoscope-Ranges.h>
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namespace kaleidoscope {
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namespace plugin {
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// =============================================================================
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/// Kaleidoscope plugin for independently assigning shifted symbols
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///
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/// This plugin provides a way to define keys that, when `shift` is held, will
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/// produce different symbols than they normally would. Either, both, or
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/// neither of the symbols assigned to a key in this way can be ones that are
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/// normally produced with the `shift` modifier. Crucially, when `shift` is
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/// held, and the `Key` to be output does not have the `shift` modifier flag
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/// applied to it, the held `shift` modifier will be suppressed.
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class CharShift : public Plugin {
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public:
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EventHandlerResult onNameQuery();
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EventHandlerResult onKeyEvent(KeyEvent &event);
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EventHandlerResult beforeReportingState(const KeyEvent &event);
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// ---------------------------------------------------------------------------
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/// A structure that stores CharShift key pair values
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///
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/// This structure stores two separate `Key` values: `lower` (to be used when
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/// a key is pressed without `shift` held), and `upper` (to be used when
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/// `shift` is held).
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struct KeyPair {
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Key lower;
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Key upper;
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/// Constructor for use in PROGMEM
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///
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/// This constructor is used when defining an array of `KeyPair` objects in
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/// PROGMEM (though it can also be used elsewhere).
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constexpr KeyPair(Key lower, Key upper) : lower(lower), upper(upper) {}
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/// Constructor for reading from PROGMEM
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///
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/// This constructor is used by the helper function that copies values from
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/// PROGMEM so that they can be used normally.
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KeyPair() = default;
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};
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/// Configure the KeyPairs array in PROGMEM
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///
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/// This function configures the PROGMEM array of `KeyPair` objects,
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/// automatically setting the internal count variable from the size of the
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/// `keypairs` array given, which must be a fixed-sized array, not a pointer.
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/// Generally, it will be called via the `KEYPAIRS()` preprocessor macro, not
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/// directly by user code.
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template <uint8_t _num_keypairs>
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static void setProgmemKeyPairs(KeyPair const(&keypairs)[_num_keypairs]) {
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progmem_keypairs_ = keypairs;
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num_keypairs_ = _num_keypairs;
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}
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private:
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// A pointer to an array of `KeyPair` objects in PROGMEM
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static KeyPair const * progmem_keypairs_;
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// The size of the PROGMEM array of `KeyPair` objects
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static uint8_t num_keypairs_;
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// If a `shift` key needs to be suppressed in `beforeReportingState()`
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static bool reverse_shift_state_;
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/// Test for keys that should be handled by CharShift
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static bool isCharShiftKey(Key key);
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/// Look up the `KeyPair` specified by the given keymap entry
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static KeyPair decodeCharShiftKey(Key key);
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/// Get the total number of KeyPairs defined
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///
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/// This function can be overridden in order to store the `KeyPair` array in
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/// EEPROM instead of PROGMEM.
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static uint8_t numKeyPairs();
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/// Get the `KeyPair` at the specified index from the defined `KeyPair` array
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///
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/// This function can be overridden in order to store the `KeyPair` array in
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/// EEPROM instead of PROGMEM.
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static KeyPair readKeyPair(uint8_t n);
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// Default for `keypairsCount()`: size of the PROGMEM array
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static uint8_t numProgmemKeyPairs();
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// Default for `readKeypair(i)`: fetch the value from PROGMEM
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static KeyPair readKeyPairFromProgmem(uint8_t n);
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};
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} // namespace plugin
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} // namespace kaleidoscope
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extern kaleidoscope::plugin::CharShift CharShift;
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/// Define an array of `KeyPair` objects in PROGMEM
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///
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/// This preprocessor macro takes a list of `KeyPair` objects as arguments, and
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/// defines them as an array in PROGMEM, and configures `CharShift` to use that
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/// array, automatically setting the count correctly to prevent out-of-bounds
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/// lookups.
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#define CS_KEYS(keypairs...) { \
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static kaleidoscope::plugin::CharShift::KeyPair const kp_table[] PROGMEM = { \
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keypairs \
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}; \
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CharShift.setProgmemKeyPairs(kp_table); \
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}
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/// Define an `KeyPair` entry in a keymap
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///
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/// This defines a `Key` object that will be handled by the CharShift plugin.
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/// The argument `n` is the index number of the `KeyPair` in the array (starting
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/// at zero).
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constexpr kaleidoscope::Key CS(uint8_t n) {
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return kaleidoscope::Key(kaleidoscope::ranges::CS_FIRST + n);
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}
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Reference in new issue