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import type { Command } from '@codemirror/view';
import { action, makeObservable, observable } from 'mobx';
import getLogger from '../utils/getLogger';
import type EditorStore from './EditorStore';
const log = getLogger('editor.PanelStore');
export default class PanelStore {
state = false;
constructor(
private readonly panelId: string,
private readonly openCommand: Command,
private readonly closeCommand: Command,
private readonly store: EditorStore,
) {
makeObservable(this, {
state: observable,
open: action,
close: action,
toggle: action,
synchronizeStateToView: action,
});
}
open(): boolean {
return this.setState(true);
}
close(): boolean {
return this.setState(false);
}
toggle(): void {
this.setState(!this.state);
}
private setState(newState: boolean): boolean {
if (this.state === newState) {
return false;
}
log.debug('Show', this.panelId, 'panel', newState);
if (newState) {
this.doOpen();
} else {
this.doClose();
}
this.state = newState;
return true;
}
synchronizeStateToView(): void {
this.doClose();
if (this.state) {
this.doOpen();
}
}
private doOpen(): void {
if (!this.store.doCommand(this.openCommand)) {
return;
}
const { view } = this.store;
if (view === undefined) {
return;
}
const buttonQuery = `.cm-${this.panelId}.cm-panel button[name="close"]`;
const closeButton = view.dom.querySelector(buttonQuery);
if (closeButton !== null) {
log.debug('Addig close button callback to', this.panelId, 'panel');
// We must remove the event listener from the button that dispatches a transaction
// without going through `EditorStore`. This listened is added by CodeMirror,
// and we can only remove it by cloning the DOM node: https://stackoverflow.com/a/9251864
const closeButtonWithoutListeners = closeButton.cloneNode(true);
closeButtonWithoutListeners.addEventListener('click', (event) => {
this.close();
event.preventDefault();
});
closeButton.replaceWith(closeButtonWithoutListeners);
} else {
log.error('Opened', this.panelId, 'panel has no close button');
}
}
private doClose(): void {
this.store.doCommand(this.closeCommand);
}
}
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