WhiteSur-gtk-theme/src/sass/gtk/apps/_xfce.scss

//
// Xfce4
//
$text_shadow: 0 0 1px rgba(0, 0, 0, 0.26),
              0 1px 2px rgba(0, 0, 0, 0.32),
              0 2px 3px rgba(0, 0, 0, 0.12);

.XfceHeading {
  border: 0 none transparent;
  background-color: $bg_color;
  color: $fg_color;
}

.xfce4-panel {
  background-color: $panel_bg;
  color: $panel_fg;
  font-weight: 700;
  text-shadow: none;
  -gtk-icon-shadow: none;
  box-shadow: none;

  &, // unset borders
  frame > border { border-width: 0; }

  &#XfcePanelWindow { // main panel container >= 4.13.3?
    // FIXME: unneeded 1px borders are reserved by its code itself
    border: none;

    &, &.marching-ants { transition: none; } // unset transitions
  }

  button {
    font-weight: 700;
    @extend %panel_button;
    // -gtk-icon-style: symbolic;

    &#launcher-arrow { // launcher applet
      // FIXME: quite weird pseudo-classe transitions, especially :hover
      // state can't be cleared properly ( -> an upstream issue)
      &, + button.toggle {
        &:hover { box-shadow: none; } // hide indicators
      }

      + button.toggle:checked { // 'arrow' toggle button
        color: $selected_bg_color;
        box-shadow: none;
      }
    }

    &#xfce4-notification-plugin {
      padding: 0 1px; // for 4.12.2
    }
  }

  menu {
    font-weight: 400; // for enforcing regular weight
    text-shadow: none;
  }

  menubar.-vala-panel-appmenu-private { // xfce4 appmenu plugin
    > menuitem {
      font-weight: normal;
    }
  }

  widget.tasklist {
    > button.toggle {
      font-weight: 400;
      @extend %panel_button;
      // -gtk-icon-style: symbolic;
    }
  }
}

XfdesktopIconView.view {
  border-radius: 0;
  background: transparent;
  color: $selected_fg_color;
  text-shadow: $text_shadow;
  transition: none;
  animation: none;

  &:active, &:checked {
    background-color: $selected_bg_color;
    color: $selected_fg_color;
    text-shadow: none;
  }

  .rubberband { @extend %rubberband; }
}

window#whiskermenu-window {
  background-color: $bg_color;

  entry.search:focus { background-color: $base_color; }

  // no CSD class even if the sw compositor was enabled.
  > frame > border {
    border-radius: 0;
  }

  scrolledwindow {
    border-radius: $bt_radius;

    > viewport button.radio {
      padding: 2px 6px;
      margin: 2px;

      &:hover { background-color: if($variant == 'light', rgba(black, 0.12), rgba(white, 0.12)); }

      &:checked, &:active {
        background-color: $selected_bg_color;
        color: $selected_fg_color;

        &:hover { background-image: none; }
      }
    }

    treeview.view {
      &:selected:hover {
        background-color: if($variant == 'light', rgba(black, 0.1), rgba(white, 0.1));
        color: $fg_color;
      }
    }

    // iconview.view { border-radius: 0; }
  }
}

// Thunar
window.background.csd.thunar {
  > grid.horizontal > paned.horizontal > scrolledwindow.frame.sidebar.shortcuts-pane {
    border-bottom-left-radius: $wm_radius;
    background-color: $dark_sidebar_bg;

    treeview.view:not(:hover):not(:selected) {
      background-color: transparent;
    }
  }

  &.maximized, &.tiled, &.fullscreen {
    > grid.horizontal > paned.horizontal > scrolledwindow.frame.sidebar.shortcuts-pane {
      border-bottom-left-radius: $maximized_radius;
    }
  }
}

window.thunar {
  > grid.horizontal > paned.horizontal {
    > scrolledwindow.frame.sidebar.shortcuts-pane {
      border-top: none;
      background-color: $dark_sidebar_bg;

      treeview.view {
        background-color: $dark_sidebar_bg;

        &:hover { background-color: if($variant == 'light', rgba(black, 0.08), rgba(white, 0.08)); }

        &:selected, &:selected:hover, &:active:hover {
          color: $fg_color;
          background-color: $sidebar_theme_color;
        }
      }
    }

    > separator {
      background-image: image($solid_borders_color);
    }
  }

  toolbar#location-toolbar {
    border-bottom: 1px solid $header_border;

    button.path-bar-button,
    button.flat {
      @include button(header-normal);
      margin-left: 0;
      margin-right: 0;
      border-radius: $bt_radius;
      min-height: 28px;

      &:hover { @include button(header-hover); }

      &:checked { @include button(header-checked); }

      &:active { @include button(header-active); }

      &:disabled { @include button(header-insensitive); }

      &:disabled:active, &:disabled:checked { @include button(header-insensitive-active); }
    }

    > toolbutton#open-parent > button.image-button.flat:not(.toggle) {
      margin-left: 10px;
    }

    > toolbutton#open-home > button.image-button.flat:not(.toggle) {
      margin-right: 10px;
    }

    // FIXME: need to unset for weird allocation height
    entry {
      min-height: if($variant == 'light', 22px, 24px);
    }
  }

  > grid > toolbar > toolitem > widget > box > entry {
    min-height: if($variant == 'light', 22px, 24px);
    margin-left: $container_padding / 2; // Not use!
    -gtk-icon-style: symbolic;
  }

  notebook {
    // hide unneeded border
    stack > scrolledwindow.frame.standard-view {
      border-top-width: 0;
      border-right-width: 0;
    }

    // an allocation height of label node affects to close button's
    // image height (it's quite weird).
    header.top tab.reorderable-page > box > label { min-height: 0; }
  }

  > grid > paned > grid > notebook > .standard-view {
    > .view {
      border-radius: $bt_radius;
    }
  }
}


//
// mousepad
//

window.background.csd {
  > box.vertical > notebook > stack > scrolledwindow.frame {
    border: none;

    > textview {
      background-color: $base_color;

      > text {
        background-color: transparent;
        border-radius: 0 0 $wm_radius $wm_radius;
      }
    }
  }
}