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import { autocompletion, completionKeymap } from '@codemirror/autocomplete';
import { closeBrackets, closeBracketsKeymap } from '@codemirror/closebrackets';
import { defaultKeymap, indentWithTab } from '@codemirror/commands';
import { commentKeymap } from '@codemirror/comment';
import { foldGutter, foldKeymap } from '@codemirror/fold';
import { highlightActiveLineGutter, lineNumbers } from '@codemirror/gutter';
import { classHighlightStyle } from '@codemirror/highlight';
import {
history,
historyKeymap,
redo,
redoDepth,
undo,
undoDepth,
} from '@codemirror/history';
import { indentOnInput } from '@codemirror/language';
import { lintKeymap } from '@codemirror/lint';
import { bracketMatching } from '@codemirror/matchbrackets';
import { rectangularSelection } from '@codemirror/rectangular-selection';
import { searchConfig, searchKeymap } from '@codemirror/search';
import {
EditorState,
StateCommand,
StateEffect,
Transaction,
TransactionSpec,
} from '@codemirror/state';
import {
drawSelection,
EditorView,
highlightActiveLine,
highlightSpecialChars,
keymap,
} from '@codemirror/view';
import {
makeAutoObservable,
observable,
reaction,
} from 'mobx';
import { getLogger } from '../logging';
import { problemLanguageSupport } from './problemLanguageSupport';
import type { ThemeStore } from '../theme/ThemeStore';
const log = getLogger('EditorStore');
export class EditorStore {
themeStore;
state: EditorState;
emptyHistory: unknown;
showLineNumbers = false;
showSearchPanel = false;
showLintPanel = false;
readonly defaultDispatcher = (tr: Transaction): void => {
this.onTransaction(tr);
};
dispatcher = this.defaultDispatcher;
constructor(initialValue: string, themeStore: ThemeStore) {
this.themeStore = themeStore;
this.state = EditorState.create({
doc: initialValue,
extensions: [
autocompletion(),
classHighlightStyle.extension,
closeBrackets(),
bracketMatching(),
drawSelection(),
EditorState.allowMultipleSelections.of(true),
EditorView.theme({}, {
dark: this.themeStore.darkMode,
}),
highlightActiveLine(),
highlightActiveLineGutter(),
highlightSpecialChars(),
history(),
indentOnInput(),
rectangularSelection(),
searchConfig({
top: true,
matchCase: true,
}),
// We add the gutters to `extensions` in the order we want them to appear.
foldGutter(),
lineNumbers(),
keymap.of([
...closeBracketsKeymap,
...commentKeymap,
...completionKeymap,
...foldKeymap,
...historyKeymap,
indentWithTab,
// Override keys in `lintKeymap` to go through the `EditorStore`.
{ key: 'Mod-Shift-m', run: () => this.setLintPanelOpen(true) },
...lintKeymap,
// Override keys in `searchKeymap` to go through the `EditorStore`.
{ key: 'Mod-f', run: () => this.setSearchPanelOpen(true), scope: 'editor search-panel' },
{ key: 'Escape', run: () => this.setSearchPanelOpen(false), scope: 'editor search-panel' },
...searchKeymap,
...defaultKeymap,
]),
problemLanguageSupport(),
],
});
reaction(
() => this.themeStore.darkMode,
(darkMode) => {
log.debug('Update editor dark mode', darkMode);
this.dispatch({
effects: [
StateEffect.appendConfig.of(EditorView.theme({}, {
dark: darkMode,
})),
],
});
},
);
makeAutoObservable(this, {
themeStore: false,
state: observable.ref,
defaultDispatcher: false,
dispatcher: false,
});
}
updateDispatcher(newDispatcher: ((tr: Transaction) => void) | null): void {
this.dispatcher = newDispatcher || this.defaultDispatcher;
}
onTransaction(tr: Transaction): void {
log.trace('Editor transaction', tr);
this.state = tr.state;
}
dispatch(...specs: readonly TransactionSpec[]): void {
this.dispatcher(this.state.update(...specs));
}
doStateCommand(command: StateCommand): boolean {
return command({
state: this.state,
dispatch: this.dispatcher,
});
}
/**
* @returns `true` if there is history to undo
*/
get canUndo(): boolean {
return undoDepth(this.state) > 0;
}
// eslint-disable-next-line class-methods-use-this
undo(): void {
log.debug('Undo', this.doStateCommand(undo));
}
/**
* @returns `true` if there is history to redo
*/
get canRedo(): boolean {
return redoDepth(this.state) > 0;
}
// eslint-disable-next-line class-methods-use-this
redo(): void {
log.debug('Redo', this.doStateCommand(redo));
}
toggleLineNumbers(): void {
this.showLineNumbers = !this.showLineNumbers;
log.debug('Show line numbers', this.showLineNumbers);
}
/**
* Sets whether the CodeMirror search panel should be open.
*
* This method can be used as a CodeMirror command,
* because it returns `false` if it didn't execute,
* allowing other commands for the same keybind to run instead.
* This matches the behavior of the `openSearchPanel` and `closeSearchPanel`
* commands from `'@codemirror/search'`.
*
* @param newShosSearchPanel whether we should show the search panel
* @returns `true` if the state was changed, `false` otherwise
*/
setSearchPanelOpen(newShowSearchPanel: boolean): boolean {
if (this.showSearchPanel === newShowSearchPanel) {
return false;
}
this.showSearchPanel = newShowSearchPanel;
log.debug('Show search panel', this.showSearchPanel);
return true;
}
toggleSearchPanel(): void {
this.setSearchPanelOpen(!this.showSearchPanel);
}
setLintPanelOpen(newShowLintPanel: boolean): boolean {
if (this.showLintPanel === newShowLintPanel) {
return false;
}
this.showLintPanel = newShowLintPanel;
log.debug('Show lint panel', this.showLintPanel);
return true;
}
toggleLintPanel(): void {
this.setLintPanelOpen(!this.showLintPanel);
}
}
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