tabs.css

/*-----------------------------------------------------------------------------
| Variables
|----------------------------------------------------------------------------*/

:root {
  /* These need to be root because tabs get attached to the body during dragging. */
  --theia-private-horizontal-tab-height: 28.5px;
  --theia-private-horizontal-tab-scrollbar-rail-height: 7px;
  --theia-private-horizontal-tab-scrollbar-height: 5px;
}

/*-----------------------------------------------------------------------------
| General tab bar style
|----------------------------------------------------------------------------*/

.p-TabBar {
  color: var(--theia-ui-font-color1);
  background: var(--theia-layout-color1);
  font-size: var(--theia-ui-font-size1);
  cursor: pointer;
}

.p-TabBar[data-orientation='horizontal'].theia-app-bottom {
  background: var(--theia-layout-color0);
}

.p-TabBar[data-orientation='horizontal'].theia-app-bottom .p-TabBar-tab {
  background: var(--theia-layout-color0);
}

.p-TabBar[data-orientation='horizontal'].theia-app-bottom .p-TabBar-tab.p-mod-current {
  background: var(--theia-layout-color0);
  border-top: var(--theia-border-width) solid var(--theia-ui-font-color2);
}

.p-TabBar[data-orientation='horizontal'].theia-app-bottom .p-TabBar-tab.p-mod-current.theia-mod-active {
  border-top-color: var(--theia-accent-color2);
}

.p-TabBar[data-orientation='horizontal'] {
  overflow-x: hidden;
  overflow-y: hidden;
  min-height: calc(var(--theia-private-horizontal-tab-height) + var(--theia-private-horizontal-tab-scrollbar-rail-height) / 2);
}

.p-TabBar[data-orientation='horizontal'] .p-TabBar-content {
  flex: none;
  align-items: flex-end;
  z-index: 1;
}

.p-TabBar[data-orientation='horizontal'] .p-TabBar-tab {
  flex: none;
  height: calc(var(--theia-private-horizontal-tab-height) + var(--theia-private-horizontal-tab-scrollbar-rail-height) / 2);
  min-width: 35px;
  line-height: var(--theia-private-horizontal-tab-height);
  padding: 0px 8px;
  background: var(--theia-layout-color2);
  align-items: center;
}

.p-TabBar[data-orientation='horizontal'] .p-TabBar-tab:last-child {
  border-right: var(--theia-border-width) solid var(--theia-border-color0);
}

.p-TabBar[data-orientation='horizontal'] .p-TabBar-tab:hover:not(.p-mod-current) {
  background: var(--theia-accent-color3);
}


/*-----------------------------------------------------------------------------
| Tabs in the center area (main and bottom)
|----------------------------------------------------------------------------*/

/* This is a current tab of a tab bar: each tab bar has 1. */
.p-TabBar .p-TabBar-tab.p-mod-current {
  min-height: calc(var(--theia-private-horizontal-tab-height) + var(--theia-border-width));
  background: var(--theia-layout-color0);
  color: var(--theia-ui-font-color0);
  border-top: var(--theia-border-width) solid var(--theia-layout-color0);
}

/* This is the main application level active tab: only 1 exists. */
.p-TabBar .p-TabBar-tab.p-mod-current.theia-mod-active {
  border-top-color: var(--theia-accent-color2);
}

.p-TabBar.theia-app-centers .p-TabBar-tabIcon,
.p-TabBar.theia-app-centers .p-TabBar-tabLabel,
.p-TabBar.theia-app-centers .p-TabBar-tabCloseIcon {
  display: inline-block;
}

.p-TabBar-tab-secondary-label {
  color: var(--theia-brand-color2);
  cursor: pointer;
  font-size: var(--theia-ui-font-size0);
  margin-left: 5px;
  text-decoration-line: underline;

  -webkit-appearance: none;
  -moz-appearance: none;
  background-image: linear-gradient(45deg, transparent 50%, var(--theia-ui-font-color1) 50%), linear-gradient(135deg, var(--theia-ui-font-color1) 50%, transparent 50%);
  background-position: calc(100% - 6px) 8px, calc(100% - 2px) 8px, 100% 0;
  background-size: 4px 5px;
  background-repeat: no-repeat;
  padding: 2px 14px 0 0;
}

.p-TabBar .p-TabBar-tabIcon {
    width: 15px;
    line-height: 1.7;
    font-size: 12px;
    text-align: center;
    background-repeat: no-repeat;
}

.p-TabBar.theia-app-centers .p-TabBar-tabIcon {
    height: 15px;
    background-size: 13px;
    background-position-y: 3px;
    background-color: var(--theia-tab-icon-color);
    -webkit-mask-repeat: no-repeat;
    -webkit-mask-size: 13px;
    -webkit-mask-position-y: 1px;
    mask-repeat: no-repeat;
    mask-size: 13px;
    mask-position: 0 1px;
    padding-right: 2px;
}

.p-TabBar[data-orientation='horizontal'] .file-icon.p-TabBar-tabIcon {
    background: none;
    padding-bottom: 0px;
    padding-right: 0;
    min-height: 20px;
}

.p-TabBar[data-orientation='horizontal'] .fa.p-TabBar-tabIcon {
    background: none;
    padding-bottom: 6px;
    min-height: 0;
}

.p-TabBar.theia-app-centers .p-TabBar-tab.p-mod-closable > .p-TabBar-tabCloseIcon {
  padding-left: 10px;
  height: 16px;
  width: 16px;
  background-size: 13px;
  background-position: center;
  background-repeat: no-repeat;
}

.p-TabBar.theia-app-centers .p-TabBar-tab.p-mod-closable {
  padding-right: 2px;
}


.p-TabBar.theia-app-centers .p-TabBar-tab.p-mod-closable:hover > .p-TabBar-tabCloseIcon,
.p-TabBar.theia-app-centers .p-TabBar-tab.p-mod-current > .p-TabBar-tabCloseIcon {
  background-image: var(--theia-icon-close);
}

.p-TabBar.theia-app-centers .p-TabBar-tab.p-mod-closable.theia-mod-dirty > .p-TabBar-tabCloseIcon {
  background-size: 10px;
  background-image: var(--theia-icon-circle);
}

.p-TabBar.theia-app-centers .p-TabBar-tab.p-mod-closable.theia-mod-dirty > .p-TabBar-tabCloseIcon:hover {
  background-size: 13px;
  background-image: var(--theia-icon-close);
}

.p-TabBar.theia-app-centers .p-TabBar-tab > .p-TabBar-tabIcon.no-icon {
  display: none;
}

/*-----------------------------------------------------------------------------
| Perfect scrollbar
|----------------------------------------------------------------------------*/

.p-TabBar[data-orientation='horizontal'] > .p-TabBar-content-container > .ps__rail-x {
  height: var(--theia-private-horizontal-tab-scrollbar-rail-height);
  z-index: 1000;
}

.p-TabBar[data-orientation='horizontal'] > .p-TabBar-content-container > .ps__rail-x  > .ps__thumb-x {
  height: var(--theia-private-horizontal-tab-scrollbar-height) !important;
  bottom: calc((var(--theia-private-horizontal-tab-scrollbar-rail-height) - var(--theia-private-horizontal-tab-scrollbar-height)) / 2);
}

.p-TabBar[data-orientation='horizontal'] > .p-TabBar-content-container > .ps__rail-x:hover,
.p-TabBar[data-orientation='horizontal'] > .p-TabBar-content-container > .ps__rail-x:focus {
  height: var(--theia-private-horizontal-tab-scrollbar-rail-height) !important;
}

.p-TabBar[data-orientation='horizontal'] > .p-TabBar-content-container > .ps__rail-x:hover > .ps__thumb-x,
.p-TabBar[data-orientation='horizontal'] > .p-TabBar-content-container > .ps__rail-x:focus > .ps__thumb-x {
  height: calc(var(--theia-private-horizontal-tab-scrollbar-height) / 2) !important;
  bottom: calc((var(--theia-private-horizontal-tab-scrollbar-rail-height) - var(--theia-private-horizontal-tab-scrollbar-height)) / 2);
}


/*-----------------------------------------------------------------------------
| Dragged tabs
|----------------------------------------------------------------------------*/

.p-TabBar-tab.p-mod-drag-image {
  transform: translateX(-40%) translateY(-58%);
  opacity: 0.8;
  min-height: var(--theia-private-horizontal-tab-height);
  padding: 0px 10px;
  font-size: var(--theia-ui-font-size1);
  line-height: var(--theia-private-horizontal-tab-height);
  color: var(--theia-ui-font-color1);
  background: var(--theia-layout-color4);
  border: var(--theia-border-width) solid var(--theia-border-color1);
  box-shadow: 1px 1px 2px rgba(0, 0, 0, 0.3);
}

.p-TabBar-tab.p-mod-drag-image > .p-TabBar-tabIcon,
.p-TabBar-tab.p-mod-drag-image > .p-TabBar-tabLabel {
  display: inline-block;
}
.p-TabBar-tab.p-mod-drag-image > .p-TabBar-tabIcon.no-icon {
  display: none;
}

.p-TabBar-tab.p-mod-drag-image > .p-TabBar-tabIcon {
  width: 15px;
  line-height: 1.7;
}

/*-----------------------------------------------------------------------------
| Tab-bar toolbar
|----------------------------------------------------------------------------*/

.p-TabBar-toolbar {
  z-index: 1001; /* Due to the scrollbar (`z-index: 1000;`) it has a greater `z-index`. */
  display: flex;
  flex-direction: row-reverse;
  padding: 4px;
  padding-left: 0px;
  margin-right: 4px;
}

.p-TabBar-content-container {
  display: flex;
  flex: 1;
}

.p-TabBar-toolbar .item {
  display: flex;
  align-items: center;
  margin-left: 8px; /* `padding` + `margin-right` from the container toolbar */
  opacity: 0.25;
  cursor: default;
}

.p-TabBar-toolbar .item.enabled {
    opacity: 1.0;
    cursor: pointer;
}

.p-TabBar-toolbar .item > div{
    height: 18px;
    width: 18px;
    background-repeat: no-repeat;
}