.#{$prefix}tree-expander {
    cursor: $tree-expander-cursor;
}

//arrows
.#{$prefix}tree-arrows {
    @if $enable-font-icons and ($tree-arrow-glyph != null) {
        .#{$prefix}tree-expander {
            @include font-icon($tree-arrow-glyph, $line-height: null);
            color: $tree-arrow-glyph-color;

            @if $include-rtl {
                &.#{$prefix}rtl {
                    @include font-icon($tree-arrow-glyph-rtl, $line-height: null);
                }
            }
        }
        .#{$prefix}grid-tree-node-expanded .#{$prefix}tree-expander {
            @include font-icon($tree-arrow-expanded-glyph, $line-height: null);
            color: $tree-arrow-expanded-glyph-color;
        }
    } @else {
        .#{$prefix}tree-expander {
            background-image: theme-background-image('tree/arrows');
        }

        .#{$prefix}tree-expander-over .#{$prefix}tree-expander {
            background-position: (-$tree-elbow-width * 2) center;
        }

        .#{$prefix}grid-tree-node-expanded .#{$prefix}tree-expander {
            background-position: (-$tree-elbow-width) center;
        }

        .#{$prefix}grid-tree-node-expanded .#{$prefix}tree-expander-over .#{$prefix}tree-expander {
            background-position: (-$tree-elbow-width * 3) center;
        }

        @if $include-rtl {
            .#{$prefix}rtl.#{$prefix}tree-expander {
                background: theme-background-image('tree/arrows-rtl') no-repeat (-$tree-elbow-width * 3) center;
            }

            .#{$prefix}tree-expander-over .#{$prefix}rtl.#{$prefix}tree-expander {
                background-position: (-$tree-elbow-width) center;
            }

            .#{$prefix}grid-tree-node-expanded .#{$prefix}rtl.#{$prefix}tree-expander {
                background-position: (-$tree-elbow-width * 2) center;
            }

            .#{$prefix}grid-tree-node-expanded .#{$prefix}tree-expander-over .#{$prefix}rtl.#{$prefix}tree-expander {
                background-position: 0 center;
            }
        }
    }
}

//elbows
@if $enable-font-icons and (($tree-expand-glyph != null) or ($tree-collapse-glyph != null)) {
    .#{$prefix}tree-elbow-plus,
    .#{$prefix}tree-elbow-end-plus {
        @if $tree-expand-glyph != null {
            @include font-icon($tree-expand-glyph, $line-height: null);
            color: $tree-expand-glyph-color;
        }

        @if $tree-collapse-glyph != null {
            .#{$prefix}grid-tree-node-expanded & {
                @include font-icon($tree-collapse-glyph, $line-height: null);
                color: $tree-collapse-glyph-color;
            }
        }
    }
} @else {
    .#{$prefix}tree-lines {
        .#{$prefix}tree-elbow {
            background-image: theme-background-image('tree/elbow');
        }

        .#{$prefix}tree-elbow-end {
            background-image: theme-background-image('tree/elbow-end');
        }

        .#{$prefix}tree-elbow-plus {
            background-image: theme-background-image('tree/elbow-plus');
        }

        .#{$prefix}tree-elbow-end-plus {
            background-image: theme-background-image('tree/elbow-end-plus');
        }

        .#{$prefix}grid-tree-node-expanded .#{$prefix}tree-elbow-plus {
            background-image: theme-background-image('tree/elbow-minus');
        }

        .#{$prefix}grid-tree-node-expanded .#{$prefix}tree-elbow-end-plus {
            background-image: theme-background-image('tree/elbow-end-minus');
        }

        .#{$prefix}tree-elbow-line {
            background-image: theme-background-image('tree/elbow-line');
        }

        @if $include-rtl {
            .#{$prefix}rtl.#{$prefix}tree-elbow {
                background-image: theme-background-image('tree/elbow-rtl');
            }

            .#{$prefix}rtl.#{$prefix}tree-elbow-end {
                background-image: theme-background-image('tree/elbow-end-rtl');
            }

            .#{$prefix}rtl.#{$prefix}tree-elbow-plus {
                background-image: theme-background-image('tree/elbow-plus-rtl');
            }

            .#{$prefix}rtl.#{$prefix}tree-elbow-end-plus {
                background-image: theme-background-image('tree/elbow-end-plus-rtl');
            }

            .#{$prefix}grid-tree-node-expanded .#{$prefix}rtl.#{$prefix}tree-elbow-plus {
                background-image: theme-background-image('tree/elbow-minus-rtl');
            }

            .#{$prefix}grid-tree-node-expanded .#{$prefix}rtl.#{$prefix}tree-elbow-end-plus {
                background-image: theme-background-image('tree/elbow-end-minus-rtl');
            }

            .#{$prefix}rtl.#{$prefix}tree-elbow-line {
                background-image: theme-background-image('tree/elbow-line-rtl');
            }
        }
    }

    .#{$prefix}tree-no-lines {
        .#{$prefix}tree-expander {
            background-image: theme-background-image('tree/elbow-plus-nl');
        }

        .#{$prefix}grid-tree-node-expanded .#{$prefix}tree-expander {
            background-image: theme-background-image('tree/elbow-minus-nl');
        }

        @if $include-rtl {
            .#{$prefix}rtl.#{$prefix}tree-expander {
                background-image: theme-background-image('tree/elbow-plus-nl-rtl');
            }

            .#{$prefix}grid-tree-node-expanded .#{$prefix}rtl.#{$prefix}tree-expander {
                background-image: theme-background-image('tree/elbow-minus-nl-rtl');
            }
        }
    }
}

.#{$prefix}tree-icon {
    width: $tree-icon-width;
    height: $grid-row-height;
    line-height: $grid-row-height;
    color: $tree-glyph-color;
    font-size: $tree-glyph-font-size;
}

.#{$prefix}tree-elbow-img {
    width: $tree-elbow-width;
    height: $grid-row-height;
    line-height: $grid-row-height;
    margin-right: $tree-elbow-spacing;
}

@if $include-rtl {
    .#{$prefix}rtl.#{$prefix}tree-elbow-img {
        margin-right: 0;
        margin-left: $tree-elbow-spacing;
    }
}

.#{$prefix}tree-icon,
.#{$prefix}tree-elbow-img,
.#{$prefix}tree-checkbox {
    // negative vertical margins are used to make the images ignore the inner cell's padding
    // this means we don't have to change the padding which ensures that the text is
    // vertically aligned exactly the same as regular grid cells
    margin-top: -(top($grid-cell-inner-padding));
    margin-bottom: -(bottom($grid-cell-inner-padding));
}

.#{$prefix}tree-icon-leaf {
    @if $enable-font-icons and ($tree-leaf-glyph != null) {
        @include font-icon($tree-leaf-glyph, $line-height: null);
        color: $tree-leaf-glyph-color;
    } @else {
        background-image: theme-background-image('tree/leaf');

        @if $include-rtl {
            &.#{$prefix}rtl {
                background-image: theme-background-image('tree/leaf-rtl');
            }
        }
    }
}

.#{$prefix}tree-icon-parent {
    @if $enable-font-icons and ($tree-folder-glyph != null) {
        @include font-icon($tree-folder-glyph, $line-height: null);
        color: $tree-folder-glyph-color;
    } @else {
        background-image: theme-background-image('tree/folder');

        @if $include-rtl {
            &.#{$prefix}rtl {
                background-image: theme-background-image('tree/folder-rtl');
            }
        }
    }
}

@if $enable-font-icons and ($tree-folder-open-glyph != null) {
    .#{$prefix}tree-icon-parent-expanded {
        @include font-icon($tree-folder-open-glyph, $line-height: null);
        color: $tree-folder-open-glyph-color;
    }
} @else {
    .#{$prefix}tree-icon-parent-expanded {
        background-image: theme-background-image('tree/folder-open');

        @if $include-rtl {
            &.#{$prefix}rtl {
                background-image: theme-background-image('tree/folder-open-rtl');
            }
        }
    }
}

.#{$prefix}tree-icon-custom {
    background-image: none;

    @if $enable-font-icons {
        &:before {
            content: '';
        }
    }

    @if $include-rtl {
        &.#{$prefix}rtl {
            background-image: none;
        }
    }
}

.#{$prefix}tree-checkbox {
    margin-right: $tree-checkbox-spacing;
    top: round(($grid-row-height - $form-checkbox-size) / 2);
    width: $form-checkbox-size;
    height: $form-checkbox-size;
    @if $enable-font-icons and ($tree-checkbox-glyph != null) {
        @include font-icon($tree-checkbox-glyph);
        color: $tree-checkbox-glyph-color;
    } @else {
        background-image: theme-background-image($form-checkbox-background-image);
    }
}

@if $include-rtl {
    .#{$prefix}rtl.#{$prefix}tree-checkbox {
        margin-right: 0;
        margin-left: $tree-checkbox-spacing;
    }
}

.#{$prefix}tree-checkbox-checked {
    @if $enable-font-icons and ($tree-checkbox-checked-glyph != null) {
        @include font-icon($tree-checkbox-checked-glyph);
    } @else {
        background-position: 0 (0 - $form-checkbox-size);
    }
}

.#{$prefix}grid-tree-loading .#{$prefix}tree-icon {
    background-image: theme-background-image('tree/loading', 'gif');
}

@if $include-rtl {
    .#{$prefix}grid-tree-loading .#{$prefix}rtl.#{$prefix}tree-icon {
        background-image: theme-background-image('tree/loading', 'gif');
    }
}

.#{$prefix}tree-node-text {
    padding-left: $tree-icon-spacing;
}

@if $include-rtl {
    .#{$prefix}rtl.#{$prefix}tree-node-text {
        padding-left: 0;
        padding-right: $tree-icon-spacing;
    }
}

@if $tree-cell-inner-padding != $grid-cell-inner-padding {
    .#{$prefix}grid-cell-inner-treecolumn {
        padding: $tree-cell-inner-padding;
    }
}