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193 lines
7.3 KiB
193 lines
7.3 KiB
/* -*- mode: c++ -*-
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* Kaleidoscope-LeaderPrefix -- Prefix arg for Leader plugin
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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.h>
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#include <Kaleidoscope-Leader.h>
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#include <Kaleidoscope-Macros.h>
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#include <Kaleidoscope-Ranges.h>
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#include "kaleidoscope/KeyEventTracker.h"
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#include "kaleidoscope/LiveKeys.h"
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#include "kaleidoscope/plugin.h"
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// clang-format off
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KEYMAPS(
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[0] = KEYMAP_STACKED
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(Key_NoKey, Key_1, Key_2, Key_3, Key_4, Key_5, Key_NoKey,
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Key_Backtick, Key_Q, Key_W, Key_E, Key_R, Key_T, Key_Tab,
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Key_PageUp, Key_A, Key_S, Key_D, Key_F, Key_G,
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Key_PageDown, Key_Z, Key_X, Key_C, Key_V, Key_B, Key_Escape,
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Key_LeftControl, Key_Backspace, Key_LeftGui, Key_LeftShift,
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LEAD(0),
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Key_skip, Key_6, Key_7, Key_8, Key_9, Key_0, Key_skip,
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Key_Enter, Key_Y, Key_U, Key_I, Key_O, Key_P, Key_Equals,
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Key_H, Key_J, Key_K, Key_L, Key_Semicolon, Key_Quote,
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Key_skip, Key_N, Key_M, Key_Comma, Key_Period, Key_Slash, Key_Minus,
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Key_RightShift, Key_RightAlt, Key_Spacebar, Key_RightControl,
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LEAD(0)),
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)
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// clang-format on
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namespace kaleidoscope {
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namespace plugin {
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// =============================================================================
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/// Plugin to supply a numeric prefix argument to Leader key functions
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///
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/// This plugin lets the user type a numeric prefix after a Leader key is
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/// pressed, but before the rest of the Leader sequence is begun, storing the
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/// "prefix argument" and making it available to functions called from the
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/// leader dictionary. LeaderPrefix allows us to define keys other than the
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/// ones on the number row to be interpreted as the "digit" keys, because
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/// whatever we use will need to be accessed without a layer change.
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class LeaderPrefix : public Plugin {
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public:
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// We need to define `onKeyswitchEvent()` instead of `onKeyEvent()` because we
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// need to intercept events before Leader sees them, and the Leader plugin
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// uses the former.
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EventHandlerResult onKeyswitchEvent(KeyEvent &event) {
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// Every `onKeyswitchEvent()` function should begin with this to prevent
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// re-processing events that it has already seen.
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if (event_tracker_.shouldIgnore(event))
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return EventHandlerResult::OK;
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// `Active` means that we're actively building the prefix argument. If the
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// plugin is not active, we're looking for a Leader key toggling on.
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if (!active_) {
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if (keyToggledOn(event.state) && isLeaderKey(event.key)) {
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// A Leader key toggled on, so we set our state to "active", and set the
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// arg value to zero.
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active_ = true;
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leader_arg_ = 0;
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}
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// Whether or not the plugin just became active, there's nothing more to
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// do for this event.
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return EventHandlerResult::OK;
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}
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// The plugin is "active", so we're looking for a "digit" key that just
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// toggled on.
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if (keyToggledOn(event.state)) {
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// We search our array of digit keys to find one that matches the event.
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// These "digit keys" are defined by their `KeyAddr` because they're
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// probably independent of keymap and layer, and because a `KeyAddr` only
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// takes one byte, whereas a `Key` takes two.
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for (uint8_t i{0}; i < 10; ++i) {
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if (digit_addrs_[i] == event.addr) {
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// We found a match, which means that one of our "digit keys" toggled
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// on. If this happens more than once, the user is typing a number
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// with multiple digits, so we multiply the current value by ten
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// before adding the new digit to the total.
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leader_arg_ *= 10;
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leader_arg_ += i;
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// Next, we mask the key that was just pressed, so that nothing will
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// happen when it is released.
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live_keys.mask(event.addr);
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// We return `ABORT` so that no other plugins (i.e. Leader) will see
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// this keypress event.
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return EventHandlerResult::ABORT;
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}
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}
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}
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// No match was found, so the key that toggled on was not one of our "digit
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// keys". Presumably, this is the first key in the Leader sequence that is
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// being typed. We leave the prefix argument at its current value so that
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// it will still be set when the sequence is finished, and allow the event
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// to pass through to the next plugin (i.e. Leader).
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active_ = false;
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return EventHandlerResult::OK;
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}
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uint16_t arg() const {
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return leader_arg_;
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}
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private:
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// The "digit keys": these are the keys on the number row of the Model01.
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KeyAddr digit_addrs_[10] = {
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KeyAddr(0, 14), KeyAddr(0, 1), KeyAddr(0, 2), KeyAddr(0, 3), KeyAddr(0, 4),
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KeyAddr(0, 5), KeyAddr(0, 10), KeyAddr(0, 11), KeyAddr(0, 12), KeyAddr(0, 13),
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};
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// This event tracker is necessary to prevent re-processing events. Any
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// plugin that defines `onKeyswitchEvent()` should use one.
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KeyEventTracker event_tracker_;
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// The current state of the plugin. It determines whether we're looking for a
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// Leader keypress or building a prefix argument.
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bool active_{false};
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// The prefix argument itself.
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uint16_t leader_arg_{0};
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// Leader should probably provide this test, but since it doesn't, we add it
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// here to determine if a key is a Leader key.
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bool isLeaderKey(Key key) {
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return (key >= ranges::LEAD_FIRST && key <= ranges::LEAD_LAST);
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}
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};
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} // namespace plugin
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} // namespace kaleidoscope
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// This creates our plugin object.
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kaleidoscope::plugin::LeaderPrefix LeaderPrefix;
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auto &serial_port = Kaleidoscope.serialPort();
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static void leaderTestX(uint8_t seq_index) {
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serial_port.println(F("leaderTestX"));
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}
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static void leaderTestXX(uint8_t seq_index) {
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serial_port.println(F("leaderTestXX"));
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}
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// This demonstrates how to use the prefix argument in a Leader function. In
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// this case, our function just types as many `x` characters as specified by the
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// prefix arg.
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void leaderTestPrefix(uint8_t seq_index) {
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// Read the prefix argument into a temporary variable:
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uint8_t prefix_arg = LeaderPrefix.arg();
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// Use a Macros helper function to tap the `X` key repeatedly.
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while (prefix_arg-- > 0)
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Macros.tap(Key_X);
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}
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static const kaleidoscope::plugin::Leader::dictionary_t leader_dictionary[] PROGMEM =
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LEADER_DICT({LEADER_SEQ(LEAD(0), Key_X), leaderTestX},
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{LEADER_SEQ(LEAD(0), Key_X, Key_X), leaderTestXX},
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{LEADER_SEQ(LEAD(0), Key_Z), leaderTestPrefix});
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// The order matters here; LeaderPrefix won't work unless it precedes Leader in
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// this list. If there are other plugins in the list, these two should ideally
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// be next to each other, but that's not necessary.
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KALEIDOSCOPE_INIT_PLUGINS(LeaderPrefix, Leader);
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void setup() {
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Kaleidoscope.setup();
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Leader.dictionary = leader_dictionary;
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}
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void loop() {
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Kaleidoscope.loop();
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}
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