//
// Mixins
// --------------------------------------------------


// UTILITY MIXINS
// --------------------------------------------------

// Clearfix
// --------
// For clearing floats like a boss h5bp.com/q
.clearfix {
  &:before,
  &:after {
    display: table;
    content: "";
    // Fixes Opera/contenteditable bug:
    // http://nicolasgallagher.com/micro-clearfix-hack/#comment-36952
    line-height: 0;
  }
  &:after {
    clear: both;
  }
}

// Webkit-style focus
// ------------------
.tab-focus() {
  // Default
  outline: thin dotted @gray-3;
  // Webkit
  outline: 5px auto -webkit-focus-ring-color;
}

// Center-align a block level element
// ----------------------------------
.center-block() {
  display: block;
  margin-left: auto;
  margin-right: auto;
}

// Sizing shortcuts
// -------------------------
.size(@height, @width) {
  width: @width;
  height: @height;
}
.square(@size) {
  .size(@size, @size);
}

// Placeholder text
// -------------------------
.placeholder(@color: @placeholderText) {
  &:-moz-placeholder {
    color: @color;
  }
  &:-ms-input-placeholder {
    color: @color;
  }
  &::-webkit-input-placeholder {
    color: @color;
  }
}

// Text overflow
// -------------------------
// Requires inline-block or block for proper styling
.text-overflow() {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

// CSS image replacement
// -------------------------
// Source: https://github.com/h5bp/html5-boilerplate/commit/aa0396eae757
.hide-text {
  font: 0/0 a;
  color: transparent;
  text-shadow: none;
  background-color: transparent;
  border: 0;
}


// FONTS
// --------------------------------------------------

#font {
  #family {
    .serif() {
      font-family: @serifFontFamily;
    }
    .sans-serif() {
      font-family: @sansFontFamily;
    }
    .monospace() {
      font-family: @monoFontFamily;
    }
  }
  .shorthand(@size: @baseFontSize, @weight: normal, @lineHeight: @baseLineHeight) {
    font-size: @size;
    font-weight: @weight;
    line-height: @lineHeight;
  }
  .serif(@size: @baseFontSize, @weight: normal, @lineHeight: @baseLineHeight) {
    #font > #family > .serif;
    #font > .shorthand(@size, @weight, @lineHeight);
  }
  .sans-serif(@size: @baseFontSize, @weight: normal, @lineHeight: @baseLineHeight) {
    #font > #family > .sans-serif;
    #font > .shorthand(@size, @weight, @lineHeight);
  }
  .monospace(@size: @baseFontSize, @weight: normal, @lineHeight: @baseLineHeight) {
    #font > #family > .monospace;
    #font > .shorthand(@size, @weight, @lineHeight);
  }
}


// FORMS
// --------------------------------------------------

// Block level inputs
.input-block-level {
  display: block;
  width: 100%;
  min-height: @inputHeight; // Make inputs at least the height of their button counterpart (base line-height + padding + border)
  .box-sizing(border-box); // Makes inputs behave like true block-level elements
}



// Mixin for form field states
//SD: I've had to modify this slightly to work nicely with angular validation , note the
// additional targetting of the ng-invalid class.
.formFieldState(@textColor: @gray-4, @borderColor: @gray-7, @backgroundColor: @gray-10) {
  // Set the text color
  > .control-label,
  > .umb-el-wrap > .control-label,
  > .umb-el-wrap > .control-header > .control-label,
  .help-block,
  .help-inline {
    color: @textColor;
  }
  // Style inputs accordingly
  .checkbox.ng-invalid,
  .radio.ng-invalid,
  input.ng-invalid,
  select.ng-invalid,
  textarea.ng-invalid {
    color: @textColor;
  }
  input.ng-invalid,
  select.ng-invalid,
  textarea.ng-invalid {
    border-color: @borderColor;
  }
  // Give a small background color for input-prepend/-append
  .input-prepend .add-on,
  .input-append .add-on {
    color: @textColor;
    background-color: @backgroundColor;
    border-color: @textColor;
  }
}

// CSS3 PROPERTIES
// --------------------------------------------------

// Border Radius
.border-radius(@radius) {
    border-radius: @radius;
}

// Single Corner Border Radius
.border-top-left-radius(@radius) {
    border-top-left-radius: @radius;
}
.border-top-right-radius(@radius) {
    border-top-right-radius: @radius;
}
.border-bottom-right-radius(@radius) {
    border-bottom-right-radius: @radius;
}
.border-bottom-left-radius(@radius) {
    border-bottom-left-radius: @radius;
}

// Single Side Border Radius
.border-top-radius(@radius) {
  .border-top-right-radius(@radius);
  .border-top-left-radius(@radius);
}
.border-right-radius(@radius) {
  .border-top-right-radius(@radius);
  .border-bottom-right-radius(@radius);
}
.border-bottom-radius(@radius) {
  .border-bottom-right-radius(@radius);
  .border-bottom-left-radius(@radius);
}
.border-left-radius(@radius) {
  .border-top-left-radius(@radius);
  .border-bottom-left-radius(@radius);
}

// Drop shadows
.box-shadow(@shadow) {
    box-shadow: @shadow;
}

// Transitions
.transition(@transition) {
    transition: @transition;
}
.transition-delay(@transition-delay) {
    transition-delay: @transition-delay;
}
.transition-duration(@transition-duration) {
    transition-duration: @transition-duration;
}

// Transformations
.rotate(@degrees) {
    transform: rotate(@degrees);
}
.scale(@ratio) {
    transform: scale(@ratio);
}
.translate(@x, @y) {
    transform: translate(@x, @y);
}
.skew(@x, @y) {
    transform: skew(@x, @y);
    -webkit-backface-visibility: hidden; // See https://github.com/twitter/bootstrap/issues/5319
}
.translate3d(@x, @y, @z) {
    transform: translate3d(@x, @y, @z);
}

// Backface visibility
// Prevent browsers from flickering when using CSS 3D transforms.
// Default value is `visible`, but can be changed to `hidden
// See git pull https://github.com/dannykeane/bootstrap.git backface-visibility for examples
.backface-visibility(@visibility){
	-webkit-backface-visibility: @visibility;
	   -moz-backface-visibility: @visibility;
	        backface-visibility: @visibility;
}

// Background clipping
// Heads up: FF 3.6 and under need "padding" instead of "padding-box"
.background-clip(@clip) {
    background-clip: @clip;
}

// Background sizing
.background-size(@size) {
    background-size: @size;
}


// Box sizing
.box-sizing(@boxmodel) {
    box-sizing: @boxmodel;
}

// User select
// For selecting text on the page
.user-select(@select) {
  -webkit-user-select: @select;
     -moz-user-select: @select;
      -ms-user-select: @select;
       -o-user-select: @select;
          user-select: @select;
}

// Resize anything
.resizable(@direction) {
  resize: @direction; // Options: horizontal, vertical, both
  overflow: auto; // Safari fix
}

// CSS3 Content Columns
.content-columns(@columnCount, @columnGap: @gridGutterWidth) {
  -webkit-column-count: @columnCount;
     -moz-column-count: @columnCount;
          column-count: @columnCount;
  -webkit-column-gap: @columnGap;
     -moz-column-gap: @columnGap;
          column-gap: @columnGap;
}

// Optional hyphenation
.hyphens(@mode: auto) {
  word-wrap: break-word;
  -webkit-hyphens: @mode;
     -moz-hyphens: @mode;
      -ms-hyphens: @mode;
       -o-hyphens: @mode;
          hyphens: @mode;
}

// Opacity
.opacity(@opacity) {
  opacity: (@opacity / 100);
}

// Position
.absolute() {
    position:absolute;
    top:0;
    right:0;
    bottom:0;
    left:0;
}

// BACKGROUNDS
// --------------------------------------------------

// Add an alphatransparency value to any background or border color (via Elyse Holladay)
#translucent {
  .background(@color: @white, @alpha: 1) {
    background-color: hsla(hue(@color), saturation(@color), lightness(@color), @alpha);
  }
  .border(@color: @white, @alpha: 1) {
    border-color: hsla(hue(@color), saturation(@color), lightness(@color), @alpha);
    .background-clip(padding-box);
  }
}

// Gradient Bar Colors for buttons and alerts
.gradientBar(@primaryColor, @secondaryColor, @textColor: @white) {
  color: @textColor;
  #gradient > .vertical(@primaryColor, @secondaryColor);
  border-color: @secondaryColor @secondaryColor darken(@secondaryColor, 15%);
  border-color: rgba(0,0,0,.1) rgba(0,0,0,.1) fadein(rgba(0,0,0,.1), 15%);
}

// Gradients
#gradient {
  .horizontal(@startColor: @gray, @endColor: @grayDark) {
    background-color: @endColor;
    background-image: -moz-linear-gradient(left, @startColor, @endColor); // FF 3.6+
    background-image: -webkit-gradient(linear, 0 0, 100% 0, from(@startColor), to(@endColor)); // Safari 4+, Chrome 2+
    background-image: -webkit-linear-gradient(left, @startColor, @endColor); // Safari 5.1+, Chrome 10+
    background-image: -o-linear-gradient(left, @startColor, @endColor); // Opera 11.10
    background-image: linear-gradient(to right, @startColor, @endColor); // Standard, IE10
    background-repeat: repeat-x;
  }
  .vertical(@startColor: @gray, @endColor: @grayDark) {
    background-color: mix(@startColor, @endColor, 60%);
    background-image: -moz-linear-gradient(top, @startColor, @endColor); // FF 3.6+
    background-image: -webkit-gradient(linear, 0 0, 0 100%, from(@startColor), to(@endColor)); // Safari 4+, Chrome 2+
    background-image: -webkit-linear-gradient(top, @startColor, @endColor); // Safari 5.1+, Chrome 10+
    background-image: -o-linear-gradient(top, @startColor, @endColor); // Opera 11.10
    background-image: linear-gradient(to bottom, @startColor, @endColor); // Standard, IE10
    background-repeat: repeat-x;
  }
  .directional(@startColor: @gray, @endColor: @grayDark, @deg: 45deg) {
    background-color: @endColor;
    background-repeat: repeat-x;
    background-image: -moz-linear-gradient(@deg, @startColor, @endColor); // FF 3.6+
    background-image: -webkit-linear-gradient(@deg, @startColor, @endColor); // Safari 5.1+, Chrome 10+
    background-image: -o-linear-gradient(@deg, @startColor, @endColor); // Opera 11.10
    background-image: linear-gradient(@deg, @startColor, @endColor); // Standard, IE10
  }
  .horizontal-three-colors(@startColor: @lightBlueIcon, @midColor: @purple-l1, @colorStop: 50%, @endColor: @pink) {
    background-color: mix(@midColor, @endColor, 80%);
    background-image: -webkit-gradient(left, linear, 0 0, 0 100%, from(@startColor), color-stop(@colorStop, @midColor), to(@endColor));
    background-image: -webkit-linear-gradient(left, @startColor, @midColor @colorStop, @endColor);
    background-image: -moz-linear-gradient(left, @startColor, @midColor @colorStop, @endColor);
    background-image: -o-linear-gradient(left, @startColor, @midColor @colorStop, @endColor);
    background-image: linear-gradient(to right, @startColor, @midColor @colorStop, @endColor);
    background-repeat: no-repeat;
  }

  .vertical-three-colors(@startColor: @lightBlueIcon, @midColor: @deepPurpleIcon, @colorStop: 50%, @endColor: @pink) {
    background-color: mix(@midColor, @endColor, 80%);
    background-image: -webkit-gradient(linear, 0 0, 0 100%, from(@startColor), color-stop(@colorStop, @midColor), to(@endColor));
    background-image: -webkit-linear-gradient(@startColor, @midColor @colorStop, @endColor);
    background-image: -moz-linear-gradient(top, @startColor, @midColor @colorStop, @endColor);
    background-image: -o-linear-gradient(@startColor, @midColor @colorStop, @endColor);
    background-image: linear-gradient(@startColor, @midColor @colorStop, @endColor);
    background-repeat: no-repeat;
  }
  .radial(@innerColor: @gray, @outerColor: @grayDark) {
    background-color: @outerColor;
    background-image: -webkit-gradient(radial, center center, 0, center center, 460, from(@innerColor), to(@outerColor));
    background-image: -webkit-radial-gradient(circle, @innerColor, @outerColor);
    background-image: -moz-radial-gradient(circle, @innerColor, @outerColor);
    background-image: -o-radial-gradient(circle, @innerColor, @outerColor);
    background-repeat: no-repeat;
  }
  .striped(@color: @gray, @angle: 45deg) {
    background-color: @color;
    background-image: -webkit-gradient(linear, 0 100%, 100% 0, color-stop(.25, rgba(255,255,255,.15)), color-stop(.25, transparent), color-stop(.5, transparent), color-stop(.5, rgba(255,255,255,.15)), color-stop(.75, rgba(255,255,255,.15)), color-stop(.75, transparent), to(transparent));
    background-image: -webkit-linear-gradient(@angle, rgba(255,255,255,.15) 25%, transparent 25%, transparent 50%, rgba(255,255,255,.15) 50%, rgba(255,255,255,.15) 75%, transparent 75%, transparent);
    background-image: -moz-linear-gradient(@angle, rgba(255,255,255,.15) 25%, transparent 25%, transparent 50%, rgba(255,255,255,.15) 50%, rgba(255,255,255,.15) 75%, transparent 75%, transparent);
    background-image: -o-linear-gradient(@angle, rgba(255,255,255,.15) 25%, transparent 25%, transparent 50%, rgba(255,255,255,.15) 50%, rgba(255,255,255,.15) 75%, transparent 75%, transparent);
    background-image: linear-gradient(@angle, rgba(255,255,255,.15) 25%, transparent 25%, transparent 50%, rgba(255,255,255,.15) 50%, rgba(255,255,255,.15) 75%, transparent 75%, transparent);
  }
}

.checkeredBackground(@backgroundColor: @white, @fillColor: @black, @fillOpacity: 0.1) {
    background-image: url('data:image/svg+xml;charset=utf-8,\
                        <svg xmlns="http://www.w3.org/2000/svg" width="100" height="100" viewBox="0 0 100 100" fill="@{fillColor}" fill-opacity="@{fillOpacity}" >\
                            <rect x="50" width="50" height="50" />\
                            <rect y="50" width="50" height="50" />\
                        </svg>');
    background-color: @backgroundColor;
    background-size: 10px 10px;
    background-repeat: repeat;
}

// COMPONENT MIXINS
// --------------------------------------------------
// Limit width of specific property editors
.umb-property-editor--limit-width {
    max-width: @propertyEditorLimitedWidth;
}

// Horizontal dividers
// -------------------------
// Dividers (basically an hr) within dropdowns and nav lists
.nav-divider(@top: @gray-8, @bottom: @white) {
  height: 1px;
  margin: ((@baseLineHeight / 2) - 1) 1px; // 8px 1px
  overflow: hidden;
  background-color: @top;
  border-bottom: 1px solid @bottom;
}

// Button backgrounds
// ------------------
.buttonBackground(@startColor, @hoverColor: @startColor, @textColor: @white, @textColorHover: @textColor, @disabledColor: @sand-1, @disabledTextColor: @white) {

  color: @textColor;
  border-color: @startColor @startColor darken(@startColor, 15%);
  border-color: rgba(0,0,0,.1) rgba(0,0,0,.1) fadein(rgba(0,0,0,.1), 15%);

  background-color: @startColor;

  .caret {
      border-top-color: @textColor;
      border-bottom-color: @textColor;
  }

  // in these cases the gradient won't cover the background, so we override
  &:focus,
  &:hover {
    color: @textColorHover;
    background-color: @hoverColor;
    text-decoration: none;
  }

  &.disabled, &[disabled] {
    background-color: @disabledColor;
    color: @disabledTextColor;
  }
}

// Navbar vertical align
// -------------------------
// Vertically center elements in the navbar.
// Example: an element has a height of 30px, so write out `.navbarVerticalAlign(30px);` to calculate the appropriate top margin.
.navbarVerticalAlign(@elementHeight) {
  margin-top: ((@navbarHeight - @elementHeight) / 2);
}



// Grid System
// -----------

// Centered container element
.container-fixed() {
  margin-right: auto;
  margin-left: auto;
  .clearfix();
}

// Table columns
.tableColumns(@columnSpan: 1) {
  float: none; // undo default grid column styles
  width: ((@gridColumnWidth * @columnSpan) + (@gridGutterWidth * (@columnSpan - 1)) - 16); // 16 is total padding on left and right of table cells
  margin-left: 0; // undo default grid column styles
}

// Make a Grid
// Use .makeRow and .makeColumn to assign semantic layouts grid system behavior
.makeRow() {
  margin-left: (@gridGutterWidth * -1);
  .clearfix();
}
.makeColumn(@columns: 1, @offset: 0) {
  float: left;
  margin-left: ((@gridColumnWidth * @offset) + (@gridGutterWidth * (@offset - 1)) + (@gridGutterWidth * 2));
  width: ((@gridColumnWidth * @columns) + (@gridGutterWidth * (@columns - 1)));
}

// The Grid
#grid {

  .core (@gridColumnWidth, @gridGutterWidth) {

    .spanX (@index) when (@index > 0) {
      .span@{index} { .span(@index); }
      .spanX((@index - 1));
    }
    .spanX (0) {}

    .offsetX (@index) when (@index > 0) {
      .offset@{index} { .offset(@index); }
      .offsetX((@index - 1));
    }
    .offsetX (0) {}

    .offset (@columns) {
      margin-left: ((@gridColumnWidth * @columns) + (@gridGutterWidth * (@columns + 1)));
    }

    .span (@columns) {
      width: ((@gridColumnWidth * @columns) + (@gridGutterWidth * (@columns - 1)));
    }

    .row {
      margin-left: (@gridGutterWidth * -1);
      .clearfix();
    }

    [class*="span"] {
      float: left;
      min-height: 1px; // prevent collapsing columns
      margin-left: @gridGutterWidth;
    }

    // Set the container width, and override it for fixed navbars in media queries
    .container,
    .navbar-static-top .container,
    .navbar-fixed-top .container,
    .navbar-fixed-bottom .container { .span(@gridColumns); }

    // generate .spanX and .offsetX
    .spanX (@gridColumns);
    .offsetX (@gridColumns);

  }

  .fluid (@fluidGridColumnWidth, @fluidGridGutterWidth) {

    .spanX (@index) when (@index > 0) {
      .span@{index} { .span(@index); }
      .spanX((@index - 1));
    }
    .spanX (0) {}

    .offsetX (@index) when (@index > 0) {
      .offset@{index} { .offset(@index); }
      .offset@{index}:first-child { .offsetFirstChild(@index); }
      .offsetX((@index - 1));
    }
    .offsetX (0) {}

    .offset (@columns) {
      margin-left: ((@fluidGridColumnWidth * @columns) + (@fluidGridGutterWidth * (@columns - 1)) + (@fluidGridGutterWidth * 2));
    }

    .offsetFirstChild (@columns) {
      margin-left: ((@fluidGridColumnWidth * @columns) + (@fluidGridGutterWidth * (@columns - 1)) + (@fluidGridGutterWidth));
    }

    .span (@columns) {
      width: ((@fluidGridColumnWidth * @columns) + (@fluidGridGutterWidth * (@columns - 1)));
    }

    .row-fluid {
      width: 100%;
      .clearfix();
      [class*="span"] {
        .input-block-level();
        float: left;
        margin-left: @fluidGridGutterWidth;
      }
      [class*="span"]:first-child {
        margin-left: 0;
      }

      // Space grid-sized controls properly if multiple per line
      .controls-row [class*="span"] + [class*="span"] {
        margin-left: @fluidGridGutterWidth;
      }

      // generate .spanX and .offsetX
      .spanX (@gridColumns);
      .offsetX (@gridColumns);
    }

  }

  .input(@gridColumnWidth, @gridGutterWidth) {

    .spanX (@index) when (@index > 0) {
      input.span@{index}, textarea.span@{index}, .uneditable-input.span@{index} { .span(@index); }
      .spanX((@index - 1));
    }
    .spanX (0) {}

    .span(@columns) {
      width: ((@gridColumnWidth * @columns) + (@gridGutterWidth * (@columns - 1)) - 14);
    }

    input,
    textarea,
    .uneditable-input {
      margin-left: 0; // override margin-left from core grid system
    }

    // Space grid-sized controls properly if multiple per line
    .controls-row [class*="span"] + [class*="span"] {
      margin-left: @gridGutterWidth;
    }

    // generate .spanX
    .spanX (@gridColumns);

  }
}
