Examples with SelfLoopOrderingStrategy org.eclipse.elk.alg.layered.options.SelfLoopOrderingStrategy used on opensource projects

Example 1 with SelfLoopOrderingStrategy

use of org.eclipse.elk.alg.layered.options.SelfLoopOrderingStrategy in project elk by eclipse.

the class LabelPlacer method assignSideAndAlignment.

// ///////////////////////////////////////////////////////////////////////////////////////////////////////////////
// Side and Alignment
private void assignSideAndAlignment(final SelfLoopHolder slHolder) {
    // Most loops are straightforward, but the one-sides northern and southern ones may not be. If the loops are
    // stacked, we can simply center their labels. If they are sequenced, we want to go from the outer loops to the
    // inner loops in pairs, and align their labels away from each other. To do so, we need to collect all of them
    // first.
    List<SelfHyperLoop> northernOneSidedSLLoops = null;
    List<SelfHyperLoop> southernOneSidedSLLoops = null;
    SelfLoopOrderingStrategy orderingStrategy = slHolder.getLNode().getProperty(LayeredOptions.EDGE_ROUTING_SELF_LOOP_ORDERING);
    if (orderingStrategy == SelfLoopOrderingStrategy.SEQUENCED) {
        northernOneSidedSLLoops = new ArrayList<>();
        southernOneSidedSLLoops = new ArrayList<>();
    }
    // Assign sides and alignments; how this works differs for the different kinds of labels
    for (SelfHyperLoop slLoop : slHolder.getSLHyperLoops()) {
        // If this loop doesn't have any labels, don't bother
        SelfHyperLoopLabels slLabels = slLoop.getSLLabels();
        if (slLabels == null) {
            continue;
        }
        assert !slLabels.getLLabels().isEmpty();
        // How we place labels largely depends on the self loop type
        switch(slLoop.getSelfLoopType()) {
            case ONE_SIDE:
                PortSide loopSide = slLoop.getOccupiedPortSides().iterator().next();
                if (orderingStrategy == SelfLoopOrderingStrategy.SEQUENCED && (loopSide == PortSide.NORTH)) {
                    // Collect for deferred processing
                    northernOneSidedSLLoops.add(slLoop);
                } else if (orderingStrategy == SelfLoopOrderingStrategy.SEQUENCED && (loopSide == PortSide.SOUTH)) {
                    // Collect for deferred processing
                    southernOneSidedSLLoops.add(slLoop);
                } else {
                    assignOneSidedSimpleSideAndAlignment(slLoop, loopSide);
                }
                break;
            case TWO_SIDES_CORNER:
                assignTwoSidesCornerSideAndAlignment(slLoop);
                break;
            case TWO_SIDES_OPPOSING:
            case THREE_SIDES:
                assignTwoSidesOpposingAndThreeSidesSideAndAlignment(slLoop);
                break;
            case FOUR_SIDES:
                assignFourSidesSideAndAlignment(slLoop);
                break;
            default:
                assert false;
        }
    }
    // Process deferred loops
    if (northernOneSidedSLLoops != null) {
        if (!northernOneSidedSLLoops.isEmpty()) {
            assignOneSidedSequencedSideAndAlignment(northernOneSidedSLLoops, PortSide.NORTH);
        }
        if (!southernOneSidedSLLoops.isEmpty()) {
            assignOneSidedSequencedSideAndAlignment(southernOneSidedSLLoops, PortSide.SOUTH);
        }
    }
}