ueblueprint/scss/ueb-link.scss

ueb-link {
    --ueb-from-input-coefficient: calc(2 * var(--ueb-from-input) - 1);
    /* when from-y > to-y */
    --ueb-y-opposite            : clamp(0, var(--ueb-from-y) - var(--ueb-to-y) - 1, 1);
    display                     : block;
    min-width                   : calc(var(--ueb-link-min-width) * 1px);
    /*
     * This makes the element transparent to the hover events so that multiple path elements can stand nearby and have
     * their hover behavior correctly firing.
     */
    visibility                  : hidden;
}

ueb-link svg {
    --ueb-y-opposite-coefficient: calc(2* var(--ueb-y-opposite) - 1);
    position                    : absolute;
    top                         : 0;
    left                        : 0;
    width                       : 100%;
    height                      : 100%;
    min-height                  : 1px;
    transform                   : scaleY(calc(var(--ueb-y-opposite-coefficient) * var(--ueb-from-input-coefficient)));
    overflow                    : visible;
}

ueb-link svg path {
    visibility  : visible;
    stroke      : var(--ueb-pin-color);
    stroke-width: 1;
}

ueb-link.ueb-link-dragging svg path,
ueb-link svg g:hover path {
    stroke-width: 5;
    transition  : stroke-width 0.8s;
}

ueb-link-message {
    display   : block;
    visibility: visible;
    position  : absolute;
    top       : calc(100% * (1 - var(--ueb-y-opposite)) + 22px);
    left      : calc(
            /* If originates from an output pin, start with 100% */
            (1 - var(--ueb-from-input)) * 100%
            /* If originates from an input pin, then sum, otherwise subtract */
            + (var(--ueb-from-input-coefficient)) * var(--ueb-start-percentage)
            /* Fixed offset */
            + 15px);
    border       : 1px solid #000;
    padding      : 4px 8px;
    border-radius: 2px;
    background   : linear-gradient(to bottom, #2a2a2a 0, #151515 50%, #2a2a2a 100%);
    color        : var(--ueb-pin-dim-color);
    white-space  : nowrap;
    z-index      : 1000000;
}