/**
 * @license
 * Copyright 2016 Google Inc.
 *
 * 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.
 */

/* General utility mixins and classes with broad applicability. */

/* Make a thing unselectable.  There are currently no cases where we make it
 * selectable again. */
.unselectable() {
  user-select: none;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
}

.hidden() {
  display: none;
}

.fill-container() {
  width: 100%;
  height: 100%;
}

/* For containers which host elements overlaying other things. */
.overlay-parent() {
  /* For a detailed explanation of how this achieves an overlay, please refer
   * to https://developer.mozilla.org/en-US/docs/Web/CSS/position .
   *
   * But you don't have to, because we've encapsulated these high level
   * concepts into classes.
   *
   * This makes it possible for some children of this container to overlay the
   * others using .overlay-child(). */
  position: relative;

  /* Make sure any top or left styles applied from outside don't move this from
   * it's original position, now that it's relative to that original position.
   * This is a defensive move that came out of intensive debugging on IE 11. */
  top: 0;
  left: 0;
}

/* For things which overlay other things. */
.overlay-child() {
  /* For a detailed explanation of how this achieves an overlay, please refer
   * to https://developer.mozilla.org/en-US/docs/Web/CSS/position .
   *
   * But you don't have to, because we've encapsulated these high level
   * concepts into classes.
   *
   * This makes it possible for this child to overlay the other children of a
   * .overlay-parent() object. */
  position: absolute;

  /* Fill the container by default. */
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  margin: 0;
  padding: 0;

  .fill-container();
}

.absolute-position() {
  /* When setting "position: absolute" it uses the left,right,top,bottom
   * properties to determine the positioning.  We should set all these
   * properties to ensure it is positioned properly on all platforms. */
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  bottom: 0;
}

/* For things that should not shrink inside a flex container.
 * This will be used for all controls by default. */
.unshrinkable() {
  flex-shrink: 0;
}

/* Use this to override .unshrinkable() in particular cases that *should* shrink
 * inside a flex container. */
.shrinkable() {
  flex-shrink: 1;
}