tabby/tabby-core/src/components/tabHeader.component.scss

$tabs-height: 38px;

:host {
    position: relative;
    cursor: pointer;
    box-sizing: border-box;

    > * { cursor: pointer; }

    flex: 1000 1 200px;
    width: 200px;
    // flex-basis and width are also set through animation on AppRoot

    padding: 0 10px;

    display: flex;
    flex-direction: row;
    min-width: 0;

    overflow: hidden;

    &.flex-width {
        flex: 1000 1 auto;
        width: auto;
    }

    &.vertical {
      flex: none;
      height: $tabs-height;
    }

    .index {
        flex: none;
        font-weight: bold;
        -webkit-app-region: no-drag;
        cursor: -webkit-grab;

        width: calc(22px * var(--spaciness));
        border-radius: 10px;
        text-align: center;
        transition: 0.25s all;
        align-self: center;
        margin-top: 1px;
    }

    profile-icon {
        font-size: 13px;
        margin: 1px 4px 0 0;
    }

    .name {
        flex: auto;
        margin-top: 1px;
        overflow: hidden;
        white-space: nowrap;
        text-overflow: ellipsis;
        min-width: 0;
        align-self: center;
    }

    .index + .name {
        margin-left: 10px;
    }

    .buttons {
        display: flex;
        position: absolute;
        align-items: center;
        height: 100%;
        top: 2px;
        right: 3px;
        opacity: 0;

        button {
            display: flex;
            align-items: center;
            flex: none;
            justify-content: center;

            background: transparent;
            -webkit-app-region: no-drag;

            $button-size: 26px;
            width: $button-size;
            height: $button-size;
            border-radius: $button-size / 6;
            line-height: $button-size;
            align-self: center;

            text-align: center;
            font-size: 20px;

            &:focus {
              outline: 0;
            }
        }
    }

    &:hover .name:not(.no-hover) {
        -webkit-mask-image: linear-gradient(black 0 0), linear-gradient(to left, transparent 0%, transparent 50%, black 100%);
        -webkit-mask-size: calc(100% - 80px) auto, 80px auto;
        -webkit-mask-repeat: no-repeat;
        -webkit-mask-position: left, right;
    }

    &:hover .buttons {
        transition: 0.25s opacity;
        opacity: 1;
    }

    &.drag-region {
        -webkit-app-region: drag;
    }

    &.fully-draggable {
        cursor: -webkit-grab;
    }

    .progressbar {
        position: absolute;
        left: 0;
        top: 0;
        height: 3px;
        z-index: 1;
        transition: 0.25s width;
    }

    .colorbar {
        position: absolute;
        left: 0;
        bottom: 0;
        height: 3px;
        width: 100%;
        z-index: 1;
    }

    &.active .activity-indicator {
        display: none;
    }

    .activity-indicator {
        position: absolute;
        left: 10px;
        right: 10px;
        bottom: 4px;
        height: 2px;
    }
}