gristlabs_grist-core/app/client/components/CellPosition.ts

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import { CursorPos } from "app/client/components/Cursor";
import { DocModel, ViewFieldRec } from "app/client/models/DocModel";
import BaseRowModel = require("app/client/models/BaseRowModel");
/**
* Absolute position of a cell in a document
*/
export abstract class CellPosition {
public static equals(a: CellPosition, b: CellPosition) {
return a && b && a.colRef == b.colRef &&
a.sectionId == b.sectionId &&
a.rowId == b.rowId;
}
public static create(row: BaseRowModel, field: ViewFieldRec): CellPosition {
const rowId = row.id.peek();
const colRef = field.colRef.peek();
const sectionId = field.viewSection.peek().id.peek();
return { rowId, colRef, sectionId };
}
public sectionId: number;
public rowId: number | string;
public colRef: number;
}
/**
* Converts cursor position to cell absolute positions. Return null if the conversion is not
* possible (if cursor position doesn't have enough information)
* @param position Cursor position
* @param docModel Document model
*/
export function fromCursor(position: CursorPos, docModel: DocModel): CellPosition | null {
if (!position.sectionId || !position.rowId || position.fieldIndex == null) {
return null;
}
const section = docModel.viewSections.getRowModel(position.sectionId);
const colRef = section.viewFields().peek()[position.fieldIndex]?.colRef.peek();
const cursorPosition = {
rowId: position.rowId as (string | number), // TODO: cursor position is wrongly typed
colRef,
sectionId: position.sectionId,
};
return cursorPosition;
}
/**
* Converts cell's absolute position to current cursor position.
* @param position Cell's absolute position
* @param docModel DocModel
*/
export function toCursor(position: CellPosition, docModel: DocModel): CursorPos {
// translate colRef to fieldIndex
const fieldIndex = docModel.viewSections.getRowModel(position.sectionId)
.viewFields().peek()
.findIndex(x => x.colRef.peek() == position.colRef);
const cursorPosition = {
rowId: position.rowId as number, // this is hack, as cursor position can accept string
fieldIndex,
sectionId: position.sectionId
};
return cursorPosition;
}