insertLoopEdges method

void insertLoopEdges(NodeOutput item, State state, List<LoopNode> loopNodes)

Implementation

void insertLoopEdges(NodeOutput item, State state, List<LoopNode> loopNodes) {
  var mtx = state.mtx, initialX = state.x, initialY = state.y;
  loopNodes.forEach((LoopNode income) {
    var id = income.id, node = income.node, renderIncomeId = item.id;
    if (income.isSelfLoop) {
      state.x = initialX + 1;
      state.y = initialY;
      String selfLoopId = "$id-self";
      renderIncomeId = selfLoopId;
      insertNodeOnMatrix(
          NodeOutput(
            id: selfLoopId,
            next: [EdgeInput(outcome: id)],
            anchorType: AnchorType.loop,
            anchorMargin: AnchorMargin.start,
            orientation: AnchorOrientation.bottomRight,
            from: item.id,
            to: id,
            isAnchor: true,
            renderIncomes: [node.id],
            passedIncomes: [item.id],
            childrenOnMatrix: 1,
          ),
          state,
          false);
    }
    state.y = min(income.y, state.y);
    int initialHeight = mtx.height();
    String fromId = "$id-${item.id}-from";
    String toId = "$id-${item.id}-to";
    node.renderIncomes.add(fromId);
    if (state.y == 0 ||
        mtx.hasLoopAnchorCollision(state.x, state.y - 1, income.x, toId)) {
      mtx.insertRowBefore(state.y);
    } else {
      state.y--;
    }
    insertNodeOnMatrix(
      NodeOutput(
        id: toId,
        next: [EdgeInput(outcome: id)],
        anchorMargin: AnchorMargin.start,
        anchorType: AnchorType.loop,
        orientation: AnchorOrientation.topRight,
        from: item.id,
        to: id,
        isAnchor: true,
        renderIncomes: [renderIncomeId],
        passedIncomes: [item.id],
        childrenOnMatrix: 1,
      ),
      state,
      true,
    );
    if (initialHeight != mtx.height()) {
      initialY++;
    }
    state.x = income.x;
    insertNodeOnMatrix(
      NodeOutput(
        id: fromId,
        next: [EdgeInput(outcome: id)],
        anchorType: AnchorType.loop,
        anchorMargin: AnchorMargin.end,
        orientation: AnchorOrientation.topLeft,
        from: item.id,
        to: id,
        isAnchor: true,
        renderIncomes: [toId],
        passedIncomes: [item.id],
        childrenOnMatrix: 1,
      ),
      state,
      false,
    );
    state.x = initialX;
  });
  state.y = initialY;
  return;
}