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Allow column resizing from the right edge of any data cell #88

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Allow column resizing from the right edge of any data cell #88

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23 changes: 14 additions & 9 deletions media/main.js
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Original file line number Diff line number Diff line change
Expand Up @@ -556,16 +556,19 @@ const getRowDropTarget = clientY => {
}
return { beforeIndex, indicatorY };
};
const getColumnCell = cell => {
if (!cell || !cell.getAttribute) return null;
const col = parseInt(cell.getAttribute('data-col') || 'NaN', 10);
if (Number.isNaN(col) || col < 0) return null;
return { col, rect: cell.getBoundingClientRect() };
};
const getResizeEdgeInfo = (target, e) => {
if (!target) return null;
if (isColumnHeaderCell(target)) {
const col = parseInt(target.getAttribute('data-col') || 'NaN', 10);
if (!Number.isNaN(col)) {
const rect = target.getBoundingClientRect();
const edgeDelta = rect.right - e.clientX;
if (edgeDelta >= 0 && edgeDelta <= RESIZE_HANDLE_PX) {
return { axis: 'column', index: col, rect };
}
const columnCell = getColumnCell(target);
if (columnCell) {
const rightEdgeDelta = columnCell.rect.right - e.clientX;
if (rightEdgeDelta >= 0 && rightEdgeDelta <= RESIZE_HANDLE_PX) {
return { axis: 'column', index: columnCell.col, rect: columnCell.rect };
}
}
if (isRowIndexCell(target)) {
Expand Down Expand Up @@ -617,7 +620,9 @@ const startResizeDrag = (target, e) => {
const edge = getResizeEdgeInfo(target, e);
if (!edge) return false;
if (edge.axis === 'column') {
resizeState = { axis: 'column', index: edge.index, startPos: e.clientX, startSize: edge.rect.width };
const startCell = table.querySelector(`[data-col="${edge.index}"]`);
const startRect = startCell ? startCell.getBoundingClientRect() : edge.rect;
resizeState = { axis: 'column', index: edge.index, startPos: e.clientX, startSize: startRect.width };
table.style.cursor = 'col-resize';
return true;
}
Expand Down