dotfiles/gnome/.local/share/gnome-shell/extensions/grimble@lmt.github.io/settingsHandlers/keybindingHandler.js

/**
 * © gnome-shell-extension-tiling-assistant
 * Source: https://git.launchpad.net/ubuntu/+source/gnome-shell-extension-tiling-assistant/tree/tiling-assistant@leleat-on-github/src/prefs/shortcutListener.js
 *
 * This code is partially reused from Ubuntu tiling assistant extension (GPL-2.0).
 *
 * enableArrowBinding and disableArrowBinding are new methods.
 * Other methods are modified for our use case.
 */
import * as Main from 'resource:///org/gnome/shell/ui/main.js';
import Meta from 'gi://Meta';
import Shell from 'gi://Shell';
import GLib from 'gi://GLib';
import {Shortcut} from '../common.js';
import {Direction} from '../tileWindowManager.js';
const MAX_RESIZE_GAP = 50;
const MIN_RESIZE_GAP = 10;
/**
 * Class to handle the keyboard shortcuts (on the extension side) except the
 * ones related to the Layouts. For those, see layoutsManager.js.
 */
export default class KeybindingHandler {
    _keyBindings;
    _windowManager;
    _extensionObject = null;
    _settings;
    _waitingAction;
    _enableArrow = false;
    _prevArrowTyped;
    constructor(windowManager, extension) {
        this._extensionObject = extension;
        this._settings = extension.getSettings();
        this._windowManager = windowManager;
        this._prevArrowTyped = [Direction.North, 0];
        this._keyBindings = Shortcut.getShortcuts();
        this._keyBindings.forEach(key => {
            Main.wm.addKeybinding(key, this._settings, Meta.KeyBindingFlags.IGNORE_AUTOREPEAT, Shell.ActionMode.NORMAL, this._onCustomKeybindingPressed.bind(this, key));
        });
    }

    destroy() {
        this._keyBindings.forEach(key => Main.wm.removeKeybinding(key));
        this.disableArrowBinding();
    }

    enableArrowBinding() {
        let bindings = ['arrow-up', 'arrow-down', 'arrow-left', 'arrow-right', 'key-escape'];
        bindings.forEach(key => {
            Main.wm.addKeybinding(key, this._settings, Meta.KeyBindingFlags.IGNORE_AUTOREPEAT, Shell.ActionMode.NORMAL, this._onCustomKeybindingPressed.bind(this, key));
        });
    }

    disableArrowBinding() {
        let bindings = ['arrow-up', 'arrow-down', 'arrow-left', 'arrow-right', 'key-escape'];
        bindings.forEach(key => Main.wm.removeKeybinding(key));
    }

    compute_gap(direction) {
        const t = GLib.get_real_time();
        const dir = this._prevArrowTyped[0];
        const time = Math.min(Math.max(t - this._prevArrowTyped[1], 150000), 300000) - 150000;
        this._prevArrowTyped = [direction, t];
        let gap = dir === direction
            ? MAX_RESIZE_GAP - ((time * (MAX_RESIZE_GAP - MIN_RESIZE_GAP) / 150000))
            : MIN_RESIZE_GAP;
        return gap;
    }

    /**
     * @param {string} shortcutName
     */
    _onCustomKeybindingPressed(shortcutName) {
        switch (shortcutName) {
        case 'keybinding-close':
            global.display.get_focus_window().delete(global.get_current_time());
            break;
        case 'keybinding-open-settings':
            this._extensionObject?.openPreferences();
            break;
        case 'keybinding-rotation':
            this._windowManager.rotateWindow(global.display.get_focus_window());
            break;
        case 'keybinding-maximize':
            this._windowManager.maximizeTile(global.display.get_focus_window());
            break;
        case 'keybinding-search':
            this._windowManager.createSearchBar();
            break;
        case 'keybinding-refresh':
            // Unused
            this._windowManager.refresh();
            break;
        case 'keybinding-move-left':
            this._windowManager.moveTile(Direction.West);
            break;
        case 'keybinding-move-right':
            this._windowManager.moveTile(Direction.East);
            break;
        case 'keybinding-move-top':
            this._windowManager.moveTile(Direction.North);
            break;
        case 'keybinding-move-bottom':
            this._windowManager.moveTile(Direction.South);
            break;
        case 'keybinding-move':
            this._waitingAction = shortcutName;
            this.enableArrowBinding();
            break;
        case 'keybinding-resize':
            this._waitingAction = shortcutName;
            this.enableArrowBinding();
            break;
        case 'keybinding-resize-left':
            this._windowManager.resizeFocusedWindow(Meta.GrabOp.RESIZING_W);
            break;
        case 'keybinding-resize-right':
            this._windowManager.resizeFocusedWindow(Meta.GrabOp.RESIZING_E);
            break;
        case 'keybinding-resize-top':
            this._windowManager.resizeFocusedWindow(Meta.GrabOp.RESIZING_N);
            break;
        case 'keybinding-resize-bottom':
            this._windowManager.resizeFocusedWindow(Meta.GrabOp.RESIZING_S);
            break;
        case 'keybinding-focus':
            this._waitingAction = shortcutName;
            this.enableArrowBinding();
            break;
        case 'keybinding-focus-left':
            this._windowManager.changeFocus(Direction.West);
            break;
        case 'keybinding-focus-right':
            this._windowManager.changeFocus(Direction.East);
            break;
        case 'keybinding-focus-top':
            this._windowManager.changeFocus(Direction.North);
            break;
        case 'keybinding-focus-bottom':
            this._windowManager.changeFocus(Direction.South);
            break;
        case 'keybinding-next-workspace':
            this._windowManager.moveToWorkspace(true);
            break;
        case 'keybinding-previous-workspace':
            this._windowManager.moveToWorkspace(false);
            break;
        case 'keybinding-next-monitor':
            this._windowManager.moveToNextMonitor();
            break;
        case 'arrow-up':
            if (this._waitingAction === 'keybinding-move') {
                this._windowManager.moveTile(Direction.North);
                this.disableArrowBinding();
            } else if (this._waitingAction === 'keybinding-resize') {
                this._windowManager.resizeFocusedWindow(Meta.GrabOp.RESIZING_N, this.compute_gap(Direction.North));
            } else if (this._waitingAction === 'keybinding-focus') {
                this._windowManager.changeFocus(Direction.North);
            }
            break;
        case 'arrow-down':
            if (this._waitingAction === 'keybinding-move') {
                this._windowManager.moveTile(Direction.South);
                this.disableArrowBinding();
            } else if (this._waitingAction === 'keybinding-resize') {
                this._windowManager.resizeFocusedWindow(Meta.GrabOp.RESIZING_S, this.compute_gap(Direction.South));
            } else if (this._waitingAction === 'keybinding-focus') {
                this._windowManager.changeFocus(Direction.South);
            }
            break;
        case 'arrow-left':
            if (this._waitingAction === 'keybinding-move') {
                this._windowManager.moveTile(Direction.West);
                this.disableArrowBinding();
            } else if (this._waitingAction === 'keybinding-resize') {
                this._windowManager.resizeFocusedWindow(Meta.GrabOp.RESIZING_W, this.compute_gap(Direction.West));
            } else if (this._waitingAction === 'keybinding-focus') {
                this._windowManager.changeFocus(Direction.West);
            }
            break;
        case 'arrow-right':
            if (this._waitingAction === 'keybinding-move') {
                this._windowManager.moveTile(Direction.East);
                this.disableArrowBinding();
            } else if (this._waitingAction === 'keybinding-resize') {
                this._windowManager.resizeFocusedWindow(Meta.GrabOp.RESIZING_E, this.compute_gap(Direction.East));
            } else if (this._waitingAction === 'keybinding-focus') {
                this._windowManager.changeFocus(Direction.East);
            }
            break;
        case 'key-escape':
            this.disableArrowBinding();
            break;
        default:
            break;
        }
    }
}