/**
 * Copyright 2015 Google Inc. All Rights Reserved. 
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License. 
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
 * See the License for the specific language governing permissions and
 * limitations under the License. 
 */

/* Typography */

@mixin typo-preferred-font($usePreferred: true) {
  @if $usePreferred {
    font-family: $preferred_font;
  }
}

@mixin typo-display-4($colorContrast: false, $usePreferred: true) {
  @include typo-preferred-font($usePreferred);
  font-size: 112px;
  font-weight: 300;
  line-height: 1;
  letter-spacing: -0.04em;

  @if $colorContrast {
    opacity: 0.54;
  }
}

@mixin typo-display-3($colorContrast: false, $usePreferred: true) {
  @include typo-preferred-font($usePreferred);
  font-size: 56px;
  font-weight: 400;
  line-height: 1.35;
  letter-spacing: -0.02em;

  @if $colorContrast {
    opacity: 0.54;
  }
}

@mixin typo-display-2($colorContrast: false, $usePreferred: true) {
  @include typo-preferred-font($usePreferred);
  font-size: 45px;
  font-weight: 400;
  line-height: 48px;

  @if $colorContrast {
    opacity: 0.54;
  }
}

@mixin typo-display-1($colorContrast: false, $usePreferred: true) {
  @include typo-preferred-font($usePreferred);
  font-size: 34px;
  font-weight: 400;
  line-height: 40px;

  @if $colorContrast {
    opacity: 0.54;
  }
}

@mixin typo-headline($colorContrast: false, $usePreferred: true) {
  @include typo-preferred-font($usePreferred);
  font-size: 24px;
  font-weight: 400;
  line-height: 32px;
  -moz-osx-font-smoothing: grayscale;

  @if $colorContrast {
    opacity: 0.87;
  }
}

@mixin typo-title($colorContrast: false, $usePreferred: true) {
  @include typo-preferred-font($usePreferred);
  font-size: 20px;
  font-weight: 500;
  line-height: 1;
  letter-spacing: 0.02em;

  @if $colorContrast {
    opacity: 0.87;
  }
}

@mixin typo-subhead($colorContrast: false, $usePreferred: true) {
  @include typo-preferred-font($usePreferred);
  font-size: 16px;
  font-weight: 400;
  line-height: 24px;
  letter-spacing: 0.04em;

  @if $colorContrast {
    opacity: 0.87;
  }
}

@mixin typo-subhead-2($colorContrast: false, $usePreferred: true) {
  @include typo-preferred-font($usePreferred);
  font-size: 16px;
  font-weight: 400;
  line-height: 28px;
  letter-spacing: 0.04em;

  @if $colorContrast {
    opacity: 0.87;
  }
}

@mixin typo-body-2($colorContrast: false, $usePreferred: false) {
  @include typo-preferred-font($usePreferred);
  font-size: 14px;
  @if $usePreferred {
    font-weight: 500;
  } @else {
    font-weight: bold;
  }
  line-height: 24px;
  letter-spacing: 0;

  @if $colorContrast {
    opacity: 0.87;
  }
}

@mixin typo-body-1($colorContrast: false, $usePreferred: false) {
  @include typo-preferred-font($usePreferred);
  font-size: 14px;
  font-weight: 400;
  line-height: 24px;
  letter-spacing: 0;

  @if $colorContrast {
    opacity: 0.87;
  }
}

@mixin typo-caption($colorContrast: false, $usePreferred: false) {
  @include typo-preferred-font($usePreferred);
  font-size: 12px;
  font-weight: 400;
  line-height: 1;
  letter-spacing: 0;

  @if $colorContrast {
    opacity: 0.54;
  }
}

@mixin typo-blockquote($colorContrast: false, $usePreferred: true) {
  @include typo-preferred-font($usePreferred);
  position: relative;
  font-size: 24px;
  font-weight: 300;
  font-style: italic;
  line-height: 1.35;
  letter-spacing: 0.08em;

  &:before {
    position: absolute;
    left: -0.5em;
    content: '“';
  }

  &:after {
    content: '”';
    margin-left: -0.05em;
  }

  @if $colorContrast {
    opacity: 0.54;
  }
}

@mixin typo-menu($colorContrast: false, $usePreferred: true) {
  @include typo-preferred-font($usePreferred);
  font-size: 14px;
  font-weight: 500;
  line-height: 1;
  letter-spacing: 0;

  @if $colorContrast {
    opacity: 0.87;
  }
}

@mixin typo-button($colorContrast: false, $usePreferred: true) {
  @include typo-preferred-font($usePreferred);
  font-size: 14px;
  font-weight: 500;
  text-transform: uppercase;
  line-height: 1;
  letter-spacing: 0;

  @if $colorContrast {
    opacity: 0.87;
  }
}

@mixin typo-icon() {
  font-family: 'Material Icons';
  font-weight: normal;
  font-style: normal;
  font-size: 24px;
  line-height: 1;
  letter-spacing: normal;
  text-transform: none;
  display: inline-block;
  word-wrap: normal;
  font-feature-settings: 'liga';
  -webkit-font-feature-settings: 'liga';
  -webkit-font-smoothing: antialiased;
}

/* Shadows */

// Focus shadow mixin. 
@mixin focus-shadow() {
  box-shadow: 0 0 8px rgba(0,0,0,.18),0 8px 16px rgba(0,0,0,.36);
}

@mixin shadow-2dp() {
  box-shadow: 0 2px 2px 0 rgba(0, 0, 0, $shadow-key-penumbra-opacity),
              0 3px 1px -2px rgba(0, 0, 0, $shadow-key-umbra-opacity),
              0 1px 5px 0 rgba(0, 0, 0, $shadow-ambient-shadow-opacity);
}
@mixin shadow-3dp() {
  box-shadow: 0 3px 4px 0 rgba(0, 0, 0, $shadow-key-penumbra-opacity),
              0 3px 3px -2px rgba(0, 0, 0, $shadow-key-umbra-opacity),
              0 1px 8px 0 rgba(0, 0, 0, $shadow-ambient-shadow-opacity);
}
@mixin shadow-4dp() {
  box-shadow: 0 4px 5px 0 rgba(0, 0, 0, $shadow-key-penumbra-opacity),
              0 1px 10px 0 rgba(0, 0, 0, $shadow-ambient-shadow-opacity),
              0 2px 4px -1px rgba(0, 0, 0, $shadow-key-umbra-opacity);
}
@mixin shadow-6dp() {
  box-shadow: 0 6px 10px 0 rgba(0, 0, 0, $shadow-key-penumbra-opacity),
              0 1px 18px 0 rgba(0, 0, 0, $shadow-ambient-shadow-opacity),
              0 3px 5px -1px rgba(0, 0, 0, $shadow-key-umbra-opacity);
}
@mixin shadow-8dp() {
  box-shadow: 0 8px 10px 1px rgba(0, 0, 0, $shadow-key-penumbra-opacity),
              0 3px 14px 2px rgba(0, 0, 0, $shadow-ambient-shadow-opacity),
              0 5px 5px -3px rgba(0, 0, 0, $shadow-key-umbra-opacity);
}

@mixin shadow-16dp() {
  box-shadow: 0 16px 24px 2px rgba(0, 0, 0, $shadow-key-penumbra-opacity),
              0  6px 30px 5px rgba(0, 0, 0, $shadow-ambient-shadow-opacity),
              0  8px 10px -5px rgba(0, 0, 0, $shadow-key-umbra-opacity);
}

@mixin shadow-24dp() {
  box-shadow: 0  9px 46px  8px rgba(0, 0, 0, $shadow-key-penumbra-opacity),
              0 11px 15px -7px rgba(0, 0, 0, $shadow-ambient-shadow-opacity),
              0 24px 38px  3px rgba(0, 0, 0, $shadow-key-umbra-opacity);
}

/* Animations */

@mixin material-animation-fast-out-slow-in($duration:0.2s) {
  transition-duration: $duration;
  transition-timing-function: $animation-curve-fast-out-slow-in;
}

@mixin material-animation-linear-out-slow-in($duration:0.2s) {
  transition-duration: $duration;
  transition-timing-function: $animation-curve-linear-out-slow-in;
}

@mixin material-animation-fast-out-linear-in($duration:0.2s) {
  transition-duration: $duration;
  transition-timing-function: $animation-curve-fast-out-linear-in;
}

@mixin material-animation-default($duration:0.2s) {
  transition-duration: $duration;
  transition-timing-function: $animation-curve-default;
}

/* Dialog */

@mixin dialog-width($units:5) {
  @if(type_of($units) ! = 'number') {
    @error "The unit given to dialog-width should be a number."; 
  }
  // 56dp is the base unit width for Dialogs. 
  // With 5 units being the number of units for a mobile device. 
  // https://goo.gl/sK2O5o
  width: $units * 56px;
}
