onGetBoxModel method

void onGetBoxModel(
  1. int? id,
  2. Map<String, dynamic> params
)

Implementation

void onGetBoxModel(int? id, Map<String, dynamic> params) {
  int nodeId = params['nodeId'];
  Element? element = elementManager.getEventTargetByTargetId<Element>(nodeId);

  // BoxModel design to BorderBox in kraken.
  if (element != null && element.renderBoxModel != null && element.renderBoxModel!.hasSize) {
    ui.Offset contentBoxOffset = element.renderBoxModel!.localToGlobal(ui.Offset.zero);

    int widthWithinBorder = element.renderBoxModel!.size.width.toInt();
    int heightWithinBorder = element.renderBoxModel!.size.height.toInt();
    List<double> border = [
      contentBoxOffset.dx, contentBoxOffset.dy,
      contentBoxOffset.dx + widthWithinBorder, contentBoxOffset.dy,
      contentBoxOffset.dx + widthWithinBorder, contentBoxOffset.dy + heightWithinBorder,
      contentBoxOffset.dx, contentBoxOffset.dy + heightWithinBorder,
    ];
    List<double> padding = [
      border[0] + element.renderBoxModel!.renderStyle.borderLeft, border[1] + element.renderBoxModel!.renderStyle.borderTop,
      border[2] - element.renderBoxModel!.renderStyle.borderRight, border[3] + element.renderBoxModel!.renderStyle.borderTop,
      border[4] - element.renderBoxModel!.renderStyle.borderRight, border[5] - element.renderBoxModel!.renderStyle.borderBottom,
      border[6] + element.renderBoxModel!.renderStyle.borderLeft, border[7] - element.renderBoxModel!.renderStyle.borderBottom,
    ];
    List<double> content = [
      padding[0] + element.renderBoxModel!.renderStyle.paddingLeft, padding[1] + element.renderBoxModel!.renderStyle.paddingTop,
      padding[2] - element.renderBoxModel!.renderStyle.paddingRight, padding[3] + element.renderBoxModel!.renderStyle.paddingTop,
      padding[4] - element.renderBoxModel!.renderStyle.paddingRight, padding[5] - element.renderBoxModel!.renderStyle.paddingBottom,
      padding[6] + element.renderBoxModel!.renderStyle.paddingLeft, padding[7] - element.renderBoxModel!.renderStyle.paddingBottom,
    ];
    List<double> margin = [
      border[0] - element.renderBoxModel!.renderStyle.marginLeft.length!, border[1] - element.renderBoxModel!.renderStyle.marginTop.length!,
      border[2] + element.renderBoxModel!.renderStyle.marginRight.length!, border[3] - element.renderBoxModel!.renderStyle.marginTop.length!,
      border[4] + element.renderBoxModel!.renderStyle.marginRight.length!, border[5] + element.renderBoxModel!.renderStyle.marginBottom.length!,
      border[6] - element.renderBoxModel!.renderStyle.marginLeft.length!, border[7] + element.renderBoxModel!.renderStyle.marginBottom.length!,
    ];

    BoxModel boxModel = BoxModel(
      content: content,
      padding: padding,
      border: border,
      margin: margin,
      width: widthWithinBorder,
      height: heightWithinBorder,
    );
    sendToFrontend(id, JSONEncodableMap({
      'model': boxModel,
    }));
  } else {
    sendToFrontend(id, null);
  }
}