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import type { Node } from 'prosemirror-model';
import { Plugin, PluginKey } from 'prosemirror-state';
import {
type Decoration,
DecorationSet,
type EditorView,
} from 'prosemirror-view';
import { createRoot } from 'react-dom/client';
import { Suggestion as PreviewSuggestion } from '@/components/suggestion';
import type { Suggestion } from '@/lib/db/schema';
import type { ArtifactKind } from '@/components/artifact';
export interface UISuggestion extends Suggestion {
selectionStart: number;
selectionEnd: number;
}
interface Position {
start: number;
end: number;
}
function findPositionsInDoc(doc: Node, searchText: string): Position | null {
let positions: { start: number; end: number } | null = null;
doc.nodesBetween(0, doc.content.size, (node, pos) => {
if (node.isText && node.text) {
const index = node.text.indexOf(searchText);
if (index !== -1) {
positions = {
start: pos + index,
end: pos + index + searchText.length,
};
return false;
}
}
return true;
});
return positions;
}
export function projectWithPositions(
doc: Node,
suggestions: Array<Suggestion>,
): Array<UISuggestion> {
return suggestions.map((suggestion) => {
const positions = findPositionsInDoc(doc, suggestion.originalText);
if (!positions) {
return {
...suggestion,
selectionStart: 0,
selectionEnd: 0,
};
}
return {
...suggestion,
selectionStart: positions.start,
selectionEnd: positions.end,
};
});
}
export function createSuggestionWidget(
suggestion: UISuggestion,
view: EditorView,
artifactKind: ArtifactKind = 'text',
): { dom: HTMLElement; destroy: () => void } {
const dom = document.createElement('span');
const root = createRoot(dom);
dom.addEventListener('mousedown', (event) => {
event.preventDefault();
view.dom.blur();
});
const onApply = () => {
const { state, dispatch } = view;
const decorationTransaction = state.tr;
const currentState = suggestionsPluginKey.getState(state);
const currentDecorations = currentState?.decorations;
if (currentDecorations) {
const newDecorations = DecorationSet.create(
state.doc,
currentDecorations.find().filter((decoration: Decoration) => {
return decoration.spec.suggestionId !== suggestion.id;
}),
);
decorationTransaction.setMeta(suggestionsPluginKey, {
decorations: newDecorations,
selected: null,
});
dispatch(decorationTransaction);
}
const textTransaction = view.state.tr.replaceWith(
suggestion.selectionStart,
suggestion.selectionEnd,
state.schema.text(suggestion.suggestedText),
);
textTransaction.setMeta('no-debounce', true);
dispatch(textTransaction);
};
root.render(
<PreviewSuggestion
suggestion={suggestion}
onApply={onApply}
artifactKind={artifactKind}
/>,
);
return {
dom,
destroy: () => {
// Wrapping unmount in setTimeout to avoid synchronous unmounting during render
setTimeout(() => {
root.unmount();
}, 0);
},
};
}
export const suggestionsPluginKey = new PluginKey('suggestions');
export const suggestionsPlugin = new Plugin({
key: suggestionsPluginKey,
state: {
init() {
return { decorations: DecorationSet.empty, selected: null };
},
apply(tr, state) {
const newDecorations = tr.getMeta(suggestionsPluginKey);
if (newDecorations) return newDecorations;
return {
decorations: state.decorations.map(tr.mapping, tr.doc),
selected: state.selected,
};
},
},
props: {
decorations(state) {
return this.getState(state)?.decorations ?? DecorationSet.empty;
},
},
});
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