sgauthier
6e64e138e2
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57 lines
1.4 KiB
JavaScript
57 lines
1.4 KiB
JavaScript
export class DragSourceImpl {
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spec;
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monitor;
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connector;
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constructor(spec, monitor, connector) {
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this.spec = spec;
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this.monitor = monitor;
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this.connector = connector;
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}
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beginDrag() {
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const spec = this.spec;
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const monitor = this.monitor;
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let result = null;
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if (typeof spec.item === 'object') {
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result = spec.item;
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}
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else if (typeof spec.item === 'function') {
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result = spec.item(monitor);
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}
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else {
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result = {};
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}
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return result ?? null;
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}
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canDrag() {
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const spec = this.spec;
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const monitor = this.monitor;
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if (typeof spec.canDrag === 'boolean') {
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return spec.canDrag;
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}
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else if (typeof spec.canDrag === 'function') {
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return spec.canDrag(monitor);
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}
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else {
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return true;
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}
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}
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isDragging(globalMonitor, target) {
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const spec = this.spec;
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const monitor = this.monitor;
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const { isDragging } = spec;
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return isDragging
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? isDragging(monitor)
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: target === globalMonitor.getSourceId();
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}
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endDrag() {
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const spec = this.spec;
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const monitor = this.monitor;
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const connector = this.connector;
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const { end } = spec;
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if (end) {
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end(monitor.getItem(), monitor);
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}
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connector.reconnect();
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}
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}
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