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import { DragAndDropHelper } from '../../../pluginUtils/DragAndDrop/DragAndDropHelper';
import { getCMTableFromTable } from '../utils/getTableFromContentModel';
import type { TableEditFeature } from './TableEditFeature';
import {
isElementOfType,
normalizeRect,
MIN_ALLOWED_TABLE_CELL_WIDTH,
mutateBlock,
MIN_ALLOWED_TABLE_CELL_HEIGHT,
parseValueWithUnit,
} from 'roosterjs-content-model-dom';
import type { DragAndDropHandler } from '../../../pluginUtils/DragAndDrop/DragAndDropHandler';
import type { IEditor, ReadonlyContentModelTable } from 'roosterjs-content-model-types';
const CELL_RESIZER_WIDTH = 4;
/**
* @internal
*/
export const HORIZONTAL_RESIZER_ID = 'horizontalResizer';
/**
* @internal
*/
export const VERTICAL_RESIZER_ID = 'verticalResizer';
/**
* @internal
*/
export function createCellResizer(
editor: IEditor,
td: HTMLTableCellElement,
table: HTMLTableElement,
isRTL: boolean,
isHorizontal: boolean,
onStart: () => void,
onEnd: () => false,
anchorContainer?: HTMLElement
): TableEditFeature | null {
const document = td.ownerDocument;
const createElementData = {
tag: 'div',
style: `position: fixed; cursor: ${isHorizontal ? 'row' : 'col'}-resize; user-select: none`,
};
const zoomScale = editor.getDOMHelper().calculateZoomScale();
const div = createElement(createElementData, document) as HTMLDivElement;
(anchorContainer || document.body).appendChild(div);
const context: CellResizerContext = {
editor,
td,
table,
isRTL,
zoomScale,
onStart,
originalWidth: parseValueWithUnit(table.style.width),
};
const setPosition = isHorizontal ? setHorizontalPosition : setVerticalPosition;
setPosition(context, div);
const handler: DragAndDropHandler<CellResizerContext, CellResizerInitValue> = {
onDragStart,
// Horizontal modifies row height, vertical modifies column width
onDragging: isHorizontal ? onDraggingHorizontal : onDraggingVertical,
onDragEnd: onEnd,
};
const featureHandler = new DragAndDropHelper<CellResizerContext, CellResizerInitValue>(
div,
context,
setPosition,
handler,
zoomScale,
editor.getEnvironment().isMobileOrTablet
);
return { node: td, div, featureHandler };
}
/**
* @internal
* Exported for testing
*/
export interface CellResizerContext {
editor: IEditor;
td: HTMLTableCellElement;
table: HTMLTableElement;
isRTL: boolean;
zoomScale: number;
originalWidth: number;
onStart: () => void;
}
/**
* @internal
* Exported for testing
*/
export interface CellResizerInitValue {
cmTable: ReadonlyContentModelTable | undefined;
anchorColumn: number | undefined;
anchorRow: number | undefined;
anchorRowHeight: number;
allWidths: number[];
}
/**
* @internal
* Exported for testing
*/
export function onDragStart(context: CellResizerContext, event: MouseEvent): CellResizerInitValue {
const { td, onStart } = context;
const rect = normalizeRect(td.getBoundingClientRect());
// Get cell coordinates
const columnIndex = td.cellIndex;
const row =
td.parentElement && isElementOfType(td.parentElement, 'tr') ? td.parentElement : undefined;
const rowIndex = row?.rowIndex;
Iif (rowIndex == undefined) {
return {
cmTable: undefined,
anchorColumn: undefined,
anchorRow: undefined,
anchorRowHeight: -1,
allWidths: [],
}; // Just a fallback
}
const { editor, table } = context;
// Get Table block in content model
const cmTable = getCMTableFromTable(editor, table);
Eif (rect && cmTable) {
onStart();
return {
cmTable,
anchorColumn: columnIndex,
anchorRow: rowIndex,
anchorRowHeight: cmTable.rows[rowIndex].height,
allWidths: [...cmTable.widths],
};
} else {
return {
cmTable,
anchorColumn: undefined,
anchorRow: undefined,
anchorRowHeight: -1,
allWidths: [],
}; // Just a fallback
}
}
/**
* @internal
* Exported for testing
*/
export function onDraggingHorizontal(
context: CellResizerContext,
event: MouseEvent,
initValue: CellResizerInitValue,
deltaX: number,
deltaY: number
) {
const { table } = context;
const { cmTable, anchorRow, anchorRowHeight } = initValue;
// Assign new widths and heights to the CM table
Eif (cmTable && anchorRow != undefined && cmTable.rows[anchorRow] != undefined) {
// Modify the CM Table size
mutateBlock(cmTable).rows[anchorRow].height = (anchorRowHeight ?? 0) + deltaY;
// Normalize the new height value
const newHeight = Math.max(cmTable.rows[anchorRow].height, MIN_ALLOWED_TABLE_CELL_HEIGHT);
// Writeback CM Table size changes to DOM Table
const tableRow = table.rows[anchorRow];
for (let col = 0; col < tableRow.cells.length; col++) {
const td = tableRow.cells[col];
td.style.height = newHeight + 'px';
td.style.boxSizing = 'border-box';
}
return true;
} else {
return false;
}
}
/**
* @internal
* Exported for testing
*/
export function onDraggingVertical(
context: CellResizerContext,
event: MouseEvent,
initValue: CellResizerInitValue,
deltaX: number
) {
const { table, isRTL } = context;
const { cmTable, anchorColumn, allWidths } = initValue;
// Assign new widths and heights to the CM table
Eif (cmTable && anchorColumn != undefined) {
const mutableTable = mutateBlock(cmTable);
// Modify the CM Table size
const lastColumn = anchorColumn == cmTable.widths.length - 1;
const change = deltaX * (isRTL ? -1 : 1);
// This is the last column
if (lastColumn) {
// Only the last column changes
// Normalize the new width value
const newWidth = Math.max(
allWidths[anchorColumn] + change,
MIN_ALLOWED_TABLE_CELL_WIDTH
);
mutableTable.widths[anchorColumn] = newWidth;
} else {
// Any other two columns
const anchorChange = allWidths[anchorColumn] + change;
const nextAnchorChange = allWidths[anchorColumn + 1] - change;
Iif (
anchorChange < MIN_ALLOWED_TABLE_CELL_WIDTH ||
nextAnchorChange < MIN_ALLOWED_TABLE_CELL_WIDTH
) {
return false;
}
mutableTable.widths[anchorColumn] = anchorChange;
mutableTable.widths[anchorColumn + 1] = nextAnchorChange;
}
// Writeback CM Table size changes to DOM Table
for (let row = 0; row < table.rows.length; row++) {
const tableRow = table.rows[row];
for (let col = 0; col < tableRow.cells.length; col++) {
const td = tableRow.cells[col];
td.style.width = cmTable.widths[col] + 'px';
td.style.boxSizing = 'border-box';
}
}
Iif (context.originalWidth > 0) {
const newWidth = context.originalWidth + change + 'px';
mutableTable.format.width = newWidth;
table.style.width = newWidth;
}
return true;
} else {
return false;
}
}
function setHorizontalPosition(context: CellResizerContext, trigger: HTMLElement) {
const { td } = context;
const rect = normalizeRect(td.getBoundingClientRect());
Eif (rect) {
trigger.id = HORIZONTAL_RESIZER_ID;
trigger.style.top = rect.bottom - CELL_RESIZER_WIDTH + 'px';
trigger.style.left = rect.left + 'px';
trigger.style.width = rect.right - rect.left + 'px';
trigger.style.height = CELL_RESIZER_WIDTH + 'px';
}
}
function setVerticalPosition(context: CellResizerContext, trigger: HTMLElement) {
const { td, isRTL } = context;
const rect = normalizeRect(td.getBoundingClientRect());
Eif (rect) {
trigger.id = VERTICAL_RESIZER_ID;
trigger.style.top = rect.top + 'px';
trigger.style.left = (isRTL ? rect.left : rect.right) - CELL_RESIZER_WIDTH + 1 + 'px';
trigger.style.width = CELL_RESIZER_WIDTH + 'px';
trigger.style.height = rect.bottom - rect.top + 'px';
}
}
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