c9-core/plugins/c9.ide.ui/widgets.less

.custom-tree.ace_tree {
    background: transparent;
    border: none;
    // font: @general-font-size @general-font-family;
    .font-smoothing(@tree-font-smoothing)
}

.custom-tree.ace_tree .tree-row {
    background : transparent;
    color : @color;
    border-radius: 3px;
    margin: 0px 0px 0px 0px;
    padding-left: 6px;
    height: @tree-row-height;
}
.custom-tree.ace_tree.ace-tree-list .tree-row {
    margin: 1px 0px 0px 0px;
    padding-left: 0;
}
.custom-tree.ace_tree .tree-row.heading {
    color: @tree-heading-color;
    text-shadow: @tree-heading-text-shadow;
}

.custom-tree.ace_tree .tree-row.selected {
    background: @selected-background;
    border-color: transparent;
    color : @selected-color;
}

.custom-tree.ace_tree_focus .tree-row.selected {
    background: @selected-focus-background;
    color: @selected-focus-color;
}

.custom-tree.ace_tree .message {
    border : 0;
    padding : 3px;
    text-align : center;
    background : transparent;
    font-size: 11px;
    
    margin: 20px 10px 0 10px;
    word-wrap: break-word;
    white-space: normal;
    color: #BBB;
    line-height: 1.5em;
}

.ace_tree .tree-row .checkbox{
    outline: 1px solid rgba(255, 255, 255, 0.35);
    background: #2D2D2D;
    width: 13px;
    height: 13px;
    margin: 1px 5px 0 0px;
    display: inline-block;
    vertical-align: middle;
    pointer-events: auto;
}
.ace_tree .tree-row .checkbox.checked{
    background-image: url("@{image-path}/@{menu-check}");
    background-position: -2px -18px;
}
.ace_tree .tree-row .checkbox.half-checked{
    background-color: #565656;
    background-position: -2px -18px;
}

.custom-tree.ace_tree .tree-row .toggler{
    .image-2x("@{tree-arrow}", 20px, 10px);
    margin: 0 1px 0 0;
}

.custom-tree.ace_tree_focus .tree-row.selected .toggler{
    .image-2x("@{tree-arrow-focus-selected}", 20px, 10px);
}

.custom-tree.ace_tree .tree-row > span {    
    vertical-align: middle;
    padding: @tree-row-padding;
    line-height: 20px;
    display: inline-block;
}

.custom-tree .ace_tree-icon {
    width: 16px;
    height: 16px;
    padding: 0px;
    margin: 0px 3px 0 1px;
    background-repeat: no-repeat;
}

.loading .ace_tree-icon,
.loading-icon {
    .image-2x("@{tree-spinner}", @tree-spinner-width, @tree-spinner-height);
}

.loading.selected .ace_tree-icon,
.selected .loading-icon {
    .image-2x("@{tree-focus-spinner}", @tree-spinner-width, @tree-spinner-height);
}
        
.custom-tree.ace_tree_focus .loading.selected .ace_tree-icon,
.custom-tree.ace_tree_focus .selected .loading-icon {
    .image-2x("@{tree-selected-focus-spinner}", @tree-spinner-width, @tree-spinner-height);
}

.tree-row.dragAppendUpload -icon {
    background-image : url("@{image-path}/@{tree-upload}");
    background-position: -5px -1px;
}

.ace_treeDragImage.copy:after {
    content: "+";
    background: fade(@selected-focus-background, 92%);
    border: 1px @selected-focus-background solid;
    position: absolute;
    right: -6px;
    bottom: -6px;
    color: @selected-focus-color;
    font-size: 14px;
    border-radius: 8px;
    width: 14px;
    height: 13px;
    text-align: center;
    line-height: 13px;
    font-weight: bold;
    font-family: monospace;
    background: -webkit-radial-gradient(5px 5px, circle, rgb(126, 143, 28), rgb(76, 93, 0));
    background: radial-gradient(5px 5px, circle,  rgb(126, 143, 28), rgb(76, 93, 0));
    box-shadow: 0px 0px 7px 0px #000;
}
.ace_treeDragImage .toggler {
    pointer-events: none;
}

.custom-tree.ace_tree_DragOver .tree-row.selected {
    background: fade(@selected-background, 60%);
}
.custom-tree.ace_tree_DragOver .tree-row.dropTarget {
    background: @selected-focus-background;
    box-shadow: 1px 1px fade(@selected-focus-background, 60%) inset;
    color: @selected-color;
    border-radius: 3px;
    .box-sizing(border-box);
    margin-right: 5px;
}

.dragHighlight {
    position: absolute;
    border: solid 1px fade(@selected-focus-background, 60%);    
    border-right: rgba(0, 0, 0, 0);
    border-top: rgba(0, 0, 0, 0);
    background: fade(@selected-focus-background, 10%);
}

.dragArrow {
    position: absolute;
    border: 1px solid @selected-focus-background;
    margin-top: 2px;
}
.dragArrow::before {
    content:"";
    background: @selected-focus-background;
    position: absolute;
    top: -3px;
    left: -3px;
    width: 6px;
    height: 6px;
    border-radius: 4px;
}

.custom-tree.ace_tree-editor {
    color: @tree-editor-color;
    background-color: @tree-editor-background;
    border: 1px solid @tree-editor-border-color;
    height: @tree-editor-height !important;
    margin-top: @tree-editor-margin-top !important;
}