/**
 * @class Ext.window.Window
 */

/**
 * @var {color}
 * The base color of Windows
 */
$window-base-color: dynamic($base-color);

/**
 * @var {number}
 * The padding of Windows.
 * 
 * The padding value must be equal to or greater than value specified in the 
 * {@link #$window-border-radius} variable (or the maximum value if corner values 
 * are specified individually).  
 * See also: {@link #$window-ignore-frame-padding}
 */
$window-padding: dynamic($panel-frame-padding);

/**
 * @var {number}
 * The border-radius of Windows
 */
$window-border-radius: dynamic($panel-frame-border-radius);

/**
 * @var {number}
 * The border-width of Windows
 */
$window-border-width: dynamic(1px);

/**
 * @var {color}
 * The border-color of Windows
 */
$window-border-color: dynamic($window-base-color);

/**
 * @var {color}
 * The inner border-color of Windows
 */
$window-inner-border-color: dynamic(#fff);

/**
 * @var {number}
 * The inner border-width of Windows
 */
$window-inner-border-width: dynamic(0);

/**
 * @var {color}
 * The background-color of Windows
 */
$window-background-color: dynamic(#fff);

/**
 * @var {number}
 * The body border-width of Windows
 */
$window-body-border-width: dynamic(1px);

/**
 * @var {string}
 * The body border-style of Windows
 */
$window-body-border-style: dynamic(solid);

/**
 * @var {color}
 * The body border-color of Windows
 */
$window-body-border-color: dynamic($window-base-color);

/**
 * @var {color}
 * The body background-color of Windows
 */
$window-body-background-color: dynamic(#fff);

/**
 * @var {color}
 * The body text color of Windows
 */
$window-body-color: dynamic(#000);

/**
 * @var {number/list}
 * The padding of Window Headers
 */
$window-header-padding: dynamic($panel-frame-header-padding);

/**
 * @var {number}
 * The font-size of Window Headers
 */
$window-header-font-size: dynamic($panel-header-font-size);

/**
 * @var {number}
 * The line-height of Window Headers
 */
$window-header-line-height: dynamic($panel-header-line-height);

/**
 * @var {color}
 * The text color of Window Headers
 */
$window-header-color: dynamic($panel-header-color);

/**
 * @var {color}
 * The background-color of Window Headers
 */
$window-header-background-color: dynamic($window-base-color);

/**
 * @var {string}
 * The font-weight of Window Headers
 */
$window-header-font-weight: dynamic($panel-header-font-weight);

/**
 * @var {number}
 * The space between the Window {@link Ext.panel.Tool Tools}
 */
$window-tool-spacing: dynamic($panel-tool-spacing);

/**
 * @var {string}
 * The background sprite to use for Window {@link Ext.panel.Tool Tools}
 */
$window-tool-background-image: dynamic('tools/tool-sprites');

/**
 * @var {color}
 * The color of the outline around Window {@link Ext.panel.Tool Tools} when focused
 */
$window-tool-focus-outline-color: dynamic($panel-tool-focus-outline-color);

/**
 * @var {string}
 * The outline-style of Window {@link Ext.panel.Tool Tools} when focused
 */
$window-tool-focus-outline-style: dynamic($panel-tool-focus-outline-style);

/**
 * @var {number}
 * The outline-width of Window {@link Ext.panel.Tool Tools} when focused
 */
$window-tool-focus-outline-width: dynamic($panel-tool-focus-outline-width);

/**
 * @var {number}
 * The outline-offset of Window {@link Ext.panel.Tool Tools} when focused
 */
$window-tool-focus-outline-offset: dynamic($panel-tool-focus-outline-offset);

/**
 * @var {string}
 * The font-family of Window Headers
 */
$window-header-font-family: dynamic($panel-header-font-family);

/**
 * @var {number/list}
 * The padding of the Window Header's text element
 */
$window-header-text-padding: dynamic($panel-header-text-padding);

/**
 * @var {string}
 * The text-transform of Window Headers
 */
$window-header-text-transform: dynamic($panel-header-text-transform);

/**
 * @var {number}
 * The width of the Window Header icon
 */
$window-header-icon-width: dynamic($panel-header-icon-width);

/**
 * @var {number}
 * The height of the Window Header icon
 */
$window-header-icon-height: dynamic($panel-header-icon-height);

/**
 * @var {number}
 * The space between the Window Header icon and text
 */
$window-header-icon-spacing: dynamic($panel-header-icon-spacing);

/**
 * @var {list}
 * The background-position of  the Window Header icon
 */
$window-header-icon-background-position: dynamic($panel-header-icon-background-position);

/**
 * @var {color}
 * The color of the Window Header glyph icon
 */
$window-header-glyph-color: dynamic($window-header-color);

/**
 * @var {number}
 * The opacity of the Window Header glyph icon
 */
$window-header-glyph-opacity: dynamic($panel-header-glyph-opacity);

/**
 * @var {number}
 * The border-width of Window Headers
 */
$window-header-border-width: dynamic(1px);

/**
 * @var {color}
 * The inner border-color of Window Headers
 */
$window-header-inner-border-color: dynamic(#fff);

/**
 * @var {number}
 * The inner border-width of Window Headers
 */
$window-header-inner-border-width: dynamic(0);

/**
 * @var {boolean} $window-force-header-border
 * True to force the window header to have a border on the side facing the window body.
 * Overrides dock layout's border management border removal rules.
 */
$window-force-header-border: dynamic(true);

/**
 * @var {number}
 * The opacity of ghost Windows while dragging
 */
$window-ghost-opacity: dynamic($panel-ghost-opacity);

/**
 * @var {boolean}
 * True to include neptune style border management rules.
 */
$window-include-border-management-rules: dynamic(false);

/**
 * @var {color}
 * The color to apply to the border that wraps the body and docked items. The presence of
 * the wrap border is controlled by the {@link #border} config. Only applicable when
 * `$window-include-border-management-rules` is `true`.
 */
$window-wrap-border-color: dynamic($window-border-color);

/**
 * @var {number}
 * The width to apply to the border that wraps the body and docked items. The presence of
 * the wrap border is controlled by the {@link #border} config. Only applicable when
 * `$window-include-border-management-rules` is `true`.
 */
$window-wrap-border-width: dynamic(1px);

/**
 * @var {boolean}
 * True to include the "default" window UI
 */
$include-window-default-ui: dynamic($include-default-uis);

/**
 * @var {boolean}
 * True to ignore the frame padding.  By default, the frame mixin adds extra padding when
 * border radius is larger than border width.  This is intended to prevent the content
 * from colliding with the rounded corners of the frame.  Set this to true to prevent
 * the panel frame from adding this extra padding.
 *
 * **Note:** This var is not applicable to IE8 & IE9.
 */
$window-ignore-frame-padding: dynamic($panel-ignore-frame-padding);

/**
 * @var {number}
 * The default font-size of the Window body
 */
$window-body-font-size: dynamic($panel-body-font-size);

/**
 * @var {string}
 * The default font-weight of the Window body
 */
$window-body-font-weight: dynamic($panel-body-font-weight);

/**
 * @var {string}
 * The default font-family of the Window body
 */
$window-body-font-family: dynamic($panel-body-font-family);


// private
$window-use-classic-header-padding: dynamic(false);

/**
 * Creates a visual theme for a Window
 *
 * @param {string} $ui
 * The name of the UI being created. Can not included spaces or special punctuation
 * (used in CSS class names).
 *
 * @param {number} [$ui-padding=$window-padding]
 * The padding of the Window
 *
 * @param {number} [$ui-border-radius=$window-border-radius]
 * The border-radius of the Window
 *
 * @param {color} [$ui-border-color=$window-border-color]
 * The border-color of the Window
 *
 * @param {number} [$ui-border-width=$window-border-width]
 * The border-width of the Window
 *
 * @param {color} [$ui-inner-border-color=$window-inner-border-color]
 * The inner border-color of the Window
 *
 * @param {number} [$ui-inner-border-width=$window-inner-border-width]
 * The inner border-width of the Window
 *
 * @param {color} [$ui-header-color=$window-header-color]
 * The text color of the Header
 *
 * @param {color} [$ui-header-background-color=$window-header-background-color]
 * The background-color of the Header
 *
 * @param {number/list} [$ui-header-padding=$window-header-padding]
 * The padding of the Header
 *
 * @param {string} [$ui-header-font-family=$window-header-font-family]
 * The font-family of the Header
 *
 * @param {number} [$ui-header-font-size=$window-header-font-size]
 * The font-size of the Header
 *
 * @param {string} [$ui-header-font-weight=$window-header-font-weight]
 * The font-weight of the Header
 *
 * @param {number} [$ui-header-line-height=$window-header-line-height]
 * The line-height of the Header
 *
 * @param {number/list} [$ui-header-text-padding=$window-header-text-padding]
 * The padding of the Header's text element
 *
 * @param {string} [$ui-header-text-transform=$window-header-text-transform]
 * The text-transform of the Header
 *
 * @param {color} [$ui-header-border-color=$ui-border-color]
 * The border-color of the Header
 *
 * @param {number} [$ui-header-border-width=$window-header-border-width]
 * The border-width of the Header
 *
 * @param {color} [$ui-header-inner-border-color=$window-header-inner-border-color]
 * The inner border-color of the Header
 *
 * @param {number} [$ui-header-inner-border-width=$window-header-inner-border-width]
 * The inner border-width of the Header
 *
 * @param {number} [$ui-header-icon-width=$window-header-icon-width]
 * The width of the Header icon
 *
 * @param {number} [$ui-header-icon-height=$window-header-icon-height]
 * The height of the Header icon
 *
 * @param {number} [$ui-header-icon-spacing=$window-header-icon-spacing]
 * The space between the Header icon and text
 *
 * @param {list} [$ui-header-icon-background-position=$window-header-icon-background-position]
 * The background-position of the Header icon
 *
 * @param {color} [$ui-header-glyph-color=$window-header-glyph-color]
 * The color of the Header glyph icon
 *
 * @param {number} [$ui-header-glyph-opacity=$window-header-glyph-opacity]
 * The opacity of the Header glyph icon
 *
 * @param {number} [$ui-tool-spacing=$window-tool-spacing]
 * The space between the {@link Ext.panel.Tool Tools}
 *
 * @param {string} [$ui-tool-background-image=$window-tool-background-image]
 * The background sprite to use for {@link Ext.panel.Tool Tools}
 *
 * @param {color} [$ui-tool-focus-outline-color=$window-tool-focus-outline-color]
 * The color of the outline around {@link Ext.panel.Tool Tools} when focused
 *
 * @param {string} [$ui-tool-focus-outline-style=$window-tool-focus-outline-style]
 * The outline-style of {@link Ext.panel.Tool Tools} when focused
 *
 * @param {number} [$ui-tool-focus-outline-width=$window-tool-focus-outline-width]
 * The outline-width of {@link Ext.panel.Tool Tools} when focused
 *
 * @param {number} [$ui-tool-focus-outline-offset=$window-tool-focus-outline-offset]
 * The outline-offset of {@link Ext.panel.Tool Tools} when focused
 *
 * @param {color} [$ui-body-border-color=$window-body-border-color]
 * The border-color of the Window body
 *
 * @param {color} [$ui-body-background-color=$window-body-background-color]
 * The background-color of the Window body
 *
 * @param {number} [$ui-body-border-width=$window-body-border-width]
 * The border-width of the Window body
 *
 * @param {string} [$ui-body-border-style=$window-body-border-style]
 * The border-style of the Window body
 *
 * @param {color} [$ui-body-color=$window-body-color]
 * The color of text inside the Window body
 *
 * @param {Number} [$ui-body-font-size=$window-body-font-size]
 * The body font size
 *
 * @param {Number} [$ui-body-font-weight=$window-body-font-weight]
 * The body font weight
 *
 * @param {String} [$ui-body-font-family=$window-body-font-family]
 * The body font family
 *
 * @param {color} [$ui-background-color=$window-background-color]
 * The background color
 *
 * @param {boolean} [$ui-force-header-border=$window-force-header-border]
 * True to force the window header to have a border on the side facing
 * the window body.  Overrides dock layout's border management border
 * removal rules.
 *
 * @param {boolean} [$ui-include-border-management-rules=$window-include-border-management-rules]
 * True to include neptune style border management rules.
 *
 * @param {color} [$ui-wrap-border-color=$window-wrap-border-color]
 * The color to apply to the border that wraps the body and docked items. The presence of
 * the wrap border is controlled by the {@link #border} config. Only applicable when
 * `$ui-include-border-management-rules` is `true`.
 *
 * @param {color} [$ui-wrap-border-width=$window-wrap-border-width]
 * The width to apply to the border that wraps the body and docked items. The presence of
 * the wrap border is controlled by the {@link #border} config. Only applicable when
 * `$ui-include-border-management-rules` is `true`.
 *
 * @param {boolean} [$ui-ignore-frame-padding=$window-ignore-frame-padding]
 * True to ignore the frame padding.  By default, the frame mixin adds extra padding when
 * border radius is larger than border width.  This is intended to prevent the content
 * from colliding with the rounded corners of the frame.  Set this to true to prevent
 * the window frame from adding this extra padding.
 *
 * @param {string} $ui-label
 * This is deprecated, please use $ui instead.
 *
 * @member Ext.window.Window
 */
@mixin extjs-window-ui(
    $ui: null,

    $ui-padding: $window-padding,
    $ui-border-radius: $window-border-radius,
    $ui-border-color: $window-border-color,
    $ui-border-width: $window-border-width,
    $ui-inner-border-color: $window-inner-border-color,
    $ui-inner-border-width: $window-inner-border-width,

    $ui-header-color: $window-header-color,
    $ui-header-background-color: $window-header-background-color,
    $ui-header-padding: $window-header-padding,
    $ui-header-font-family: $window-header-font-family,
    $ui-header-font-size: $window-header-font-size,
    $ui-header-font-weight: $window-header-font-weight,
    $ui-header-line-height: $window-header-line-height,
    $ui-header-text-padding: $window-header-text-padding,
    $ui-header-text-transform: $window-header-text-transform,
    $ui-header-border-color: $ui-border-color,
    $ui-header-border-width: $window-header-border-width,
    $ui-header-inner-border-color: $window-header-inner-border-color,
    $ui-header-inner-border-width: $window-header-inner-border-width,
    $ui-header-icon-width: $window-header-icon-width,
    $ui-header-icon-height: $window-header-icon-height,
    $ui-header-icon-spacing: $window-header-icon-spacing,
    $ui-header-icon-background-position: $window-header-icon-background-position,
    $ui-header-glyph-color: $window-header-glyph-color,
    $ui-header-glyph-opacity: $window-header-glyph-opacity,

    $ui-tool-spacing: $window-tool-spacing,
    $ui-tool-background-image: $window-tool-background-image,
    $ui-tool-focus-outline-color: $window-tool-focus-outline-color,
    $ui-tool-focus-outline-style: $window-tool-focus-outline-style,
    $ui-tool-focus-outline-width: $window-tool-focus-outline-width,
    $ui-tool-focus-outline-offset: $window-tool-focus-outline-offset,

    $ui-body-border-color: $window-body-border-color,
    $ui-body-background-color: $window-body-background-color,
    $ui-body-border-width: $window-body-border-width,
    $ui-body-border-style: $window-body-border-style,
    $ui-body-color: $window-body-color,
    $ui-body-font-size: $window-body-font-size,
    $ui-body-font-weight: $window-body-font-weight,
    $ui-body-font-family: $window-body-font-family,

    $ui-background-color: $window-background-color,

    // See the docs above
    $ui-force-header-border: $window-force-header-border,
    $ui-include-border-management-rules: $window-include-border-management-rules,
    $ui-wrap-border-color: null,
    $ui-wrap-border-width: null,
    $ui-ignore-frame-padding: $window-ignore-frame-padding,

    // deprecated - use $ui instead
    $ui-label: null
){
    @if $ui == null {
        @if $ui-label != null {
            @warn '$ui-label is deprecated.  Use $ui instead';
            $ui: $ui-label;
        } @else {
            @warn "#{error('$ui is required')}";
        }
    }

    @if is-null($ui-wrap-border-color) {
        @if $ui == 'default' {
            $ui-wrap-border-color: $window-wrap-border-color;
        } @else {
            $ui-wrap-border-color: $ui-border-color;
        }
    }

    @if is-null($ui-wrap-border-width) {
        @if $ui == 'default' {
            $ui-wrap-border-width: $window-wrap-border-width;
        } @else {
            $ui-wrap-border-width: $ui-border-width;
        }
    }

    .#{$prefix}window-#{$ui} {
        @if not is-null($ui-border-color) { border-color: $ui-border-color; }
        @if not is-null($ui-border-radius) { @include border-radius($ui-border-radius); }

        @if $ui-inner-border-width != 0 {
            @include inner-border($ui-inner-border-width, $ui-inner-border-color);
        }
    }

    @if not is-null($ui-border-radius) and $ui-border-radius != 0{
        @include x-frame(
            'window',
            $ui,

            $border-radius: $ui-border-radius,
            $border-width: $ui-border-width,
            $padding: $ui-padding,
            $background-color: $ui-background-color,
            $ignore-frame-padding: $ui-ignore-frame-padding
        );
    }

    .#{$prefix}window-body-#{$ui} {
        @if not is-null($ui-body-border-color) {
            border-color: $ui-body-border-color;
            border-width: $ui-body-border-width;
            border-style: $ui-body-border-style;
        }

        @if not is-null($ui-body-background-color) { background: $ui-body-background-color; }
        @if not is-null($ui-body-color) { color: $ui-body-color; }
        @if not is-null($ui-body-font-size) {        font-size: $ui-body-font-size; }
        @if not is-null($ui-body-font-weight) {      font-weight: $ui-body-font-weight; }
        @if not is-null($ui-body-font-family) {      font-family: $ui-body-font-family; }
    }

    .#{$prefix}window-header-#{$ui} {
        @if not is-null($ui-header-font-size) { font-size: $ui-header-font-size; }
        @if not is-null($ui-border-color) { border-color: $ui-border-color; }
        background-color: $ui-header-background-color;

        .#{$prefix}tool-img {
            @if $ui-tool-background-image != $tool-background-image {
                background-image: theme-background-image($ui-tool-background-image);
            }
            // EXTJSIV-8846: partially transparent png images do not display correctly
            // in winXP/IE8m when the image element has a transparent background.
            // to fix this, we give the element the same background-color as the header.
            background-color: $ui-header-background-color;
        }
    }

    @if $include-ext-tab-bar {
        .#{$prefix}window-header-#{$ui}-horizontal {
            .#{$prefix}window-header-#{$ui}-tab-bar {
                margin-top: -(top($ui-header-padding));
                margin-bottom: -(bottom($ui-header-padding));
            }
        }

        .#{$prefix}window-header-#{$ui}-vertical {
            .#{$prefix}window-header-#{$ui}-tab-bar {
                margin-right: -(top($ui-header-padding));
                margin-left: -(bottom($ui-header-padding));
            }
        }

        @if $include-rtl {
            .#{$prefix}rtl.#{$prefix}window-header-#{$ui}-vertical {
                .#{$prefix}window-header-#{$ui}-tab-bar {
                    margin-left: -(top($ui-header-padding));
                    margin-right: -(bottom($ui-header-padding));
                }
            }
        }
    }

    .#{$prefix}window-header-title-#{$ui} {
        @if not is-null($ui-header-color) { color: $ui-header-color; }

        @if not is-null($ui-header-font-size) {   font-size: $ui-header-font-size; }
        @if not is-null($ui-header-font-weight) { font-weight: $ui-header-font-weight; }
        @if not is-null($ui-header-font-family) { font-family: $ui-header-font-family; }
        @if not is-null($ui-header-line-height) { line-height: $ui-header-line-height; }

        > {
            .#{$prefix}title-text-#{$ui} {
                padding: $ui-header-text-padding;
                text-transform: $ui-header-text-transform;

                @if $ext-trial {
                    &:after {
                        font-family: ext-watermark;
                        font-size: ($ui-header-line-height + vertical($ui-header-padding)) * 0.75;
                        content: 'd';
                        position: absolute;
                        top: 0;
                        right: 0;
                        // since IE8 does not support opacity on pseudo elements we simulate it by
                        // mixing the text color with the background color
                        color: mix($ui-header-color, $ui-header-background-color, 40%);
                    }

                    @if $include-rtl {
                        &.#{$prefix}rtl:after {
                            right: auto;
                            left: 0;
                        }
                    }
                }
                @if $ext-beta {
                    &:after {
                        font-family: ext-watermark;
                        font-size: ($ui-header-line-height + vertical($ui-header-padding)) * 0.75;
                        content: 'b';
                        position: absolute;
                        top: 0;
                        right: 0;
                        // since IE8 does not support opacity on pseudo elements we simulate it by
                        // mixing the text color with the background color
                        color: mix($ui-header-color, $ui-header-background-color, 40%);
                    }

                    @if $include-rtl {
                        &.#{$prefix}rtl:after {
                            right: auto;
                            left: 0;
                        }
                    }
                }
            }

            .#{$prefix}title-icon-wrap-#{$ui} {
                &.#{$prefix}title-icon-top {
                    height: $ui-header-icon-height + $ui-header-icon-spacing;
                    padding-bottom: $ui-header-icon-spacing;
                }

                &.#{$prefix}title-icon-right {
                    width: $ui-header-icon-width + $ui-header-icon-spacing;
                    padding-left: $ui-header-icon-spacing;

                    @if $include-rtl {
                        &.#{$prefix}rtl {
                            padding-left: 0;
                            padding-right: $ui-header-icon-spacing;
                        }
                    }
                }

                &.#{$prefix}title-icon-bottom {
                    height: $ui-header-icon-height + $ui-header-icon-spacing;
                    padding-top: $ui-header-icon-spacing;
                }

                &.#{$prefix}title-icon-left {
                    width: $ui-header-icon-width + $ui-header-icon-spacing;
                    padding-right: $ui-header-icon-spacing;

                    @if $include-rtl {
                        &.#{$prefix}rtl {
                            padding-right: 0;
                            padding-left: $ui-header-icon-spacing;
                        }
                    }
                }

                > .#{$prefix}title-icon-#{$ui} {
                    width: $ui-header-icon-width;
                    height: $ui-header-icon-height;
                    font-size: $ui-header-icon-height;
                    color: $ui-header-glyph-color;
                    background-position: $ui-header-icon-background-position;

                    &.#{$prefix}title-glyph {
                        @if $ui-header-glyph-opacity != 1 {
                            // do not use the opacity mixin because we do not want IE's filter version of
                            // opacity to be included.  We emulate the opacity setting in IE8m by mixing
                            // the icon color into the background color. (see below)
                            opacity: $ui-header-glyph-opacity;
                        }
                        // In IE8 and below when a glyph contains partially transparent pixels, we
                        // can't apply an opacity filter to the glyph element, because IE8m will render
                        // the partially transparent pixels of the glyph as black. To work around this,
                        // we emulate the approximate color that the glyph would have if it had opacity
                        // applied by mixing the glyph color with the header's background-color.
                        @if $include-ie {
                            .#{$prefix}ie8 & {
                                color: mix($ui-header-glyph-color, $ui-header-background-color, $ui-header-glyph-opacity * 100);
                            }
                        }
                    }
                }
            }
        }
    }

    $header-border-bottom-width: 0;
    @if $ui-force-header-border {
        $header-border-bottom-width: bottom($ui-header-border-width);
    }

    $header-expanded-padding: $ui-header-padding;

    @if $window-use-classic-header-padding {
        $frame-top: max(top($ui-border-width), max(top($ui-border-radius), right($ui-border-radius)));
        $header-bottom-padding-adjust: $frame-top - top($ui-border-width);

        $header-expanded-padding:
            top($ui-header-padding),
            right($ui-header-padding),
            bottom($ui-header-padding) - $header-bottom-padding-adjust,
            left($ui-header-padding);
    }

    @if not is-null($ui-border-radius) and $ui-border-radius != 0 {
        @include x-frame(
            $cls: 'window-header',
            $ui: '#{$ui}-top',
            $border-radius: top($ui-border-radius) right($ui-border-radius) 0 0,
            $border-width: top($ui-header-border-width) right($ui-header-border-width) $header-border-bottom-width left($ui-header-border-width),
            $padding: $header-expanded-padding,
            $background-color: $ui-header-background-color
        );

        @include x-frame(
            $cls: 'window-header',
            $ui: '#{$ui}-right',
            $border-radius: 0 top($ui-border-radius) right($ui-border-radius) 0,
            $border-width: left($ui-header-border-width) top($ui-header-border-width) right($ui-header-border-width) $header-border-bottom-width,
            $padding: rotate90($header-expanded-padding),
            $background-color: $ui-header-background-color,
            $include-frame-rtl: $include-rtl
        );

        @include x-frame(
            $cls: 'window-header',
            $ui: '#{$ui}-bottom',
            $border-radius: 0 0 top($ui-border-radius) left($ui-border-radius),
            $border-width: $header-border-bottom-width right($ui-header-border-width) top($ui-header-border-width) left($ui-header-border-width),
            $padding: rotate180($header-expanded-padding),
            $background-color: $ui-header-background-color
        );

        @include x-frame(
            $cls: 'window-header',
            $ui: '#{$ui}-left',
            $border-radius: right($ui-border-radius) 0 0 top($ui-border-radius),
            $border-width: right($ui-header-border-width) $header-border-bottom-width left($ui-header-border-width) top($ui-header-border-width),
            $padding: rotate270($header-expanded-padding),
            $background-color: $ui-header-background-color,
            $include-frame-rtl: $include-rtl
        );

        @include x-frame(
            $cls: 'window-header',
            $ui: '#{$ui}-collapsed-top',
            $border-radius: $ui-border-radius,
            $border-width: $ui-header-border-width,
            $padding: $ui-header-padding,
            $background-color: $ui-header-background-color
        );

        @include x-frame(
            $cls: 'window-header',
            $ui: '#{$ui}-collapsed-right',
            $border-radius: $ui-border-radius,
            $border-width: $ui-header-border-width,
            $padding: rotate90($ui-header-padding),
            $background-color: $ui-header-background-color,
            $include-frame-rtl: $include-rtl
        );

        @include x-frame(
            $cls: 'window-header',
            $ui: '#{$ui}-collapsed-bottom',
            $border-radius: $ui-border-radius,
            $border-width: $ui-header-border-width,
            $padding: rotate180($ui-header-padding),
            $background-color: $ui-header-background-color
        );

        @include x-frame(
            $cls: 'window-header',
            $ui: '#{$ui}-collapsed-left',
            $border-radius: $ui-border-radius,
            $border-width: $ui-header-border-width,
            $padding: rotate270($ui-header-padding),
            $background-color: $ui-header-background-color,
            $include-frame-rtl: $include-rtl
        );
    }

    @if $ui-header-inner-border-width != 0 {
        .#{$prefix}window-header-#{$ui}-top {
            @include inner-border($ui-header-inner-border-width, $ui-header-inner-border-color);
        }

        .#{$prefix}window-header-#{$ui}-right {
            @include inner-border(rotate90($ui-header-inner-border-width), $ui-inner-border-color);
        }

        .#{$prefix}window-header-#{$ui}-bottom {
            @include inner-border(rotate180($ui-header-inner-border-width), $ui-inner-border-color);
        }

        .#{$prefix}window-header-#{$ui}-left {
            @include inner-border(rotate270($ui-header-inner-border-width), $ui-inner-border-color);
        }
    }

    .#{$prefix}window-header-#{$ui} {
        .#{$prefix}window-header-icon {
            width: $ui-header-icon-width;
            height: $ui-header-icon-height;
            // color, font-size, and line-height are needed for glyph icons
            color: $ui-header-glyph-color;
            font-size: $ui-header-icon-height;
            line-height: $ui-header-icon-height;
            background-position: $window-header-icon-background-position;
        }
        .#{$prefix}window-header-glyph {
            color: $ui-header-glyph-color;
            font-size: $ui-header-icon-height;
            line-height: $ui-header-icon-height;

            @if $ui-header-glyph-opacity != 1 {
                // do not use the opacity mixin because we do not want IE's filter version of
                // opacity to be included.  We emulate the opacity setting in IE8m by mixing
                // the icon color into the background color. (see below)
                opacity: $ui-header-glyph-opacity;
            }
            // In IE8 and below when a glyph contains partially transparent pixels, we 
            // can't apply an opacity filter to the glyph element, because IE8m will render
            // the partially transparent pixels of the glyph as black. To work around this,
            // we emulate the approximate color that the glyph would have if it had opacity
            // applied by mixing the glyph color with the header's background-color.
            @if $include-ie {
                .#{$prefix}ie8 & {
                    color: mix($ui-header-glyph-color, $ui-header-background-color, $ui-header-glyph-opacity * 100);
                }
            }
        }
    }

    $ui-tool-margin: 0 0 0 $ui-tool-spacing;
    .#{$prefix}window-header-#{$ui}-horizontal {
        .#{$prefix}tool-after-title {
            margin: $ui-tool-margin;
        }

        @if $include-rtl {
            .#{$prefix}rtl.#{$prefix}tool-after-title {
                margin: rtl($ui-tool-margin);
            }
        }

        .#{$prefix}tool-before-title {
            margin: rtl($ui-tool-margin);
        }

        @if $include-rtl {
            .#{$prefix}rtl.#{$prefix}tool-before-title {
                margin: $ui-tool-margin;
            }
        }
    }

    .#{$prefix}window-header-#{$ui}-vertical {
        .#{$prefix}tool-after-title {
            margin: rotate90($ui-tool-margin);
        }

        @if $include-rtl {
            .#{$prefix}rtl.#{$prefix}tool-after-title {
                margin: rotate270(rtl($ui-tool-margin));
            }
        }

        .#{$prefix}tool-before-title {
            margin: rotate90(rtl($ui-tool-margin));
        }

        @if $include-rtl {
            .#{$prefix}rtl.#{$prefix}tool-before-title {
                margin: rotate270($ui-tool-margin);
            }
        }
    }

    .#{$prefix}window-header-#{$ui} {
        .#{$prefix}tool-focus {
            .#{$prefix}keyboard-mode & {
                @include css-outline(
                    $width: $ui-tool-focus-outline-width,
                    $style: $ui-tool-focus-outline-style,
                    $color: $ui-tool-focus-outline-color,
                    $offset: $ui-tool-focus-outline-offset
                );
            }
        }
    }

    // !important is needed in the following rules to override dock layout's border
    // management rules.
    @if $ui-force-header-border {
        .#{$prefix}window-header-#{$ui} {
            border-width: $ui-header-border-width !important;
        }
    } @else {
        .#{$prefix}window-#{$ui}-collapsed .#{$prefix}window-header {
            border-width: $ui-header-border-width !important;
        }
    }

    @if $include-slicer-border-radius {
        .#{$prefix}nbr .#{$prefix}window-#{$ui}-collapsed .#{$prefix}window-header {
            border-width: 0 !important;
        }
    }

    // Window resizing.
    // If there's a border that's wider than the specified threshold (Sencha default is 2) then
    // embed the handles in the borders using -ve position and make resizable windows show overflow.
    // The dock layout should ensure that all constituent elements fit within the element.
    // The only exception is during animated resizing. Overflow inline style is set hidden during animation (AbstractComponent.animate)
    @if $ui-border-width > $border-width-threshold {
        .#{$prefix}window-#{$ui}-resizable {

            // Resizable Window element overflow must be visible for embedded handles to accept mouseovers.
            overflow: visible;

            .#{$prefix}window-handle-north-br {
                top: -($ui-border-width);
            }
            .#{$prefix}window-handle-south-br {
                bottom: -($ui-border-width);
            }
            .#{$prefix}window-handle-east-br {
                right: -($ui-border-width);
            }
            .#{$prefix}window-handle-west-br {
                left: -($ui-border-width);
            }
            .#{$prefix}window-handle-northwest-br {
                left: -($ui-border-width);
                top: -($ui-border-width);
            }
            .#{$prefix}window-handle-northeast-br {
                right: -($ui-border-width);
                top: -($ui-border-width);
            }
            .#{$prefix}window-handle-southeast-br {
                right: -($ui-border-width);
                bottom: -($ui-border-width);
            }
            .#{$prefix}window-handle-southwest-br {
                left: -($ui-border-width);
                bottom: -($ui-border-width);
            }
        }
    }

    @if $ui-include-border-management-rules {
        @include border-management(
            $parent-cls: window-#{$ui},
            $border-width: $ui-wrap-border-width,
            $border-color: $ui-wrap-border-color
        );
    }
}