inject-viewerjs-style

Stylesheet for Viewer.js
Este script no debería instalarse directamente. Es una biblioteca que utilizan otros scripts mediante la meta-directiva de inclusión // @require https://update.greasyfork.org/scripts/512576/1464552/inject-viewerjs-style.js
Pregunta tus dudas, ponle nota o notifica una posible infracción de las normas.
Ajuste de línea
(async function() {
  // wait until document is ready
  await new Promise(resolve => {
    const timer = setInterval(() => {
      if (document && document.createElement && document.head && document.head.appendChild) { clearInterval(timer); resolve(); }
    }, 100);
  });

  // inject stylesheet
  const styleElement = document.createElement('style');
  styleElement.textContent = `
.viewer-zoom-in::before,
.viewer-zoom-out::before,
.viewer-one-to-one::before,
.viewer-reset::before,
.viewer-prev::before,
.viewer-play::before,
.viewer-next::before,
.viewer-rotate-left::before,
.viewer-rotate-right::before,
.viewer-flip-horizontal::before,
.viewer-flip-vertical::before,
.viewer-fullscreen::before,
.viewer-fullscreen-exit::before,
.viewer-close::before {
  background-image: url('data:image/png;base64,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');
  background-repeat: no-repeat;
  background-size: 280px;
  color: transparent;
  display: block;
  font-size: 0;
  height: 20px;
  line-height: 0;
  width: 20px;
}

.viewer-zoom-in::before {
  background-position: 0 0;
  content: 'Zoom In';
}

.viewer-zoom-out::before {
  background-position: -20px 0;
  content: 'Zoom Out';
}

.viewer-one-to-one::before {
  background-position: -40px 0;
  content: 'One to One';
}

.viewer-reset::before {
  background-position: -60px 0;
  content: 'Reset';
}

.viewer-prev::before {
  background-position: -80px 0;
  content: 'Previous';
}

.viewer-play::before {
  background-position: -100px 0;
  content: 'Play';
}

.viewer-next::before {
  background-position: -120px 0;
  content: 'Next';
}

.viewer-rotate-left::before {
  background-position: -140px 0;
  content: 'Rotate Left';
}

.viewer-rotate-right::before {
  background-position: -160px 0;
  content: 'Rotate Right';
}

.viewer-flip-horizontal::before {
  background-position: -180px 0;
  content: 'Flip Horizontal';
}

.viewer-flip-vertical::before {
  background-position: -200px 0;
  content: 'Flip Vertical';
}

.viewer-fullscreen::before {
  background-position: -220px 0;
  content: 'Enter Full Screen';
}

.viewer-fullscreen-exit::before {
  background-position: -240px 0;
  content: 'Exit Full Screen';
}

.viewer-close::before {
  background-position: -260px 0;
  content: 'Close';
}

.viewer-container {
  bottom: 0;
  direction: ltr;
  font-size: 0;
  left: 0;
  line-height: 0;
  overflow: hidden;
  position: absolute;
  right: 0;
  -webkit-tap-highlight-color: transparent;
  top: 0;
  -ms-touch-action: none;
  touch-action: none;
  -webkit-touch-callout: none;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}

.viewer-container::-moz-selection,
.viewer-container *::-moz-selection {
  background-color: transparent;
}

.viewer-container::selection,
.viewer-container *::selection {
  background-color: transparent;
}

.viewer-container:focus {
  outline: 0;
}

.viewer-container img {
  display: block;
  height: auto;
  max-height: none !important;
  max-width: none !important;
  min-height: 0 !important;
  min-width: 0 !important;
  width: 100%;
}

.viewer-canvas {
  bottom: 0;
  left: 0;
  overflow: hidden;
  position: absolute;
  right: 0;
  top: 0;
}

.viewer-canvas>img {
  height: auto;
  margin: 15px auto;
  max-width: 90% !important;
  width: auto;
}

.viewer-footer {
  bottom: 0;
  left: 0;
  overflow: hidden;
  position: absolute;
  right: 0;
  text-align: center;
}

.viewer-navbar {
  background-color: rgba(0, 0, 0, 0.5);
  overflow: hidden;
}

.viewer-list {
  box-sizing: content-box;
  height: 50px;
  margin: 0;
  overflow: hidden;
  padding: 1px 0;
}

.viewer-list>li {
  color: transparent;
  cursor: pointer;
  float: left;
  font-size: 0;
  height: 50px;
  line-height: 0;
  opacity: 0.5;
  overflow: hidden;
  transition: opacity 0.15s;
  width: 30px;
}

.viewer-list>li:focus,
.viewer-list>li:hover {
  opacity: 0.75;
}

.viewer-list>li:focus {
  outline: 0;
}

.viewer-list>li+li {
  margin-left: 1px;
}

.viewer-list>.viewer-loading {
  position: relative;
}

.viewer-list>.viewer-loading::after {
  border-width: 2px;
  height: 20px;
  margin-left: -10px;
  margin-top: -10px;
  width: 20px;
}

.viewer-list>.viewer-active,
.viewer-list>.viewer-active:focus,
.viewer-list>.viewer-active:hover {
  opacity: 1;
}

.viewer-player {
  background-color: #000;
  bottom: 0;
  cursor: none;
  display: none;
  left: 0;
  position: absolute;
  right: 0;
  top: 0;
  z-index: 1;
}

.viewer-player>img {
  left: 0;
  position: absolute;
  top: 0;
}

.viewer-toolbar>ul {
  display: inline-block;
  margin: 0 auto 5px;
  overflow: hidden;
  padding: 6px 3px;
}

.viewer-toolbar>ul>li {
  background-color: rgba(0, 0, 0, 0.5);
  border-radius: 50%;
  cursor: pointer;
  float: left;
  height: 24px;
  overflow: hidden;
  transition: background-color 0.15s;
  width: 24px;
}

.viewer-toolbar>ul>li:focus,
.viewer-toolbar>ul>li:hover {
  background-color: rgba(0, 0, 0, 0.8);
}

.viewer-toolbar>ul>li:focus {
  box-shadow: 0 0 3px #fff;
  outline: 0;
  position: relative;
  z-index: 1;
}

.viewer-toolbar>ul>li::before {
  margin: 2px;
}

.viewer-toolbar>ul>li+li {
  margin-left: 1px;
}

.viewer-toolbar>ul>.viewer-small {
  height: 18px;
  margin-bottom: 3px;
  margin-top: 3px;
  width: 18px;
}

.viewer-toolbar>ul>.viewer-small::before {
  margin: -1px;
}

.viewer-toolbar>ul>.viewer-large {
  height: 30px;
  margin-bottom: -3px;
  margin-top: -3px;
  width: 30px;
}

.viewer-toolbar>ul>.viewer-large::before {
  margin: 5px;
}

.viewer-tooltip {
  background-color: rgba(0, 0, 0, 0.8);
  border-radius: 10px;
  color: #fff;
  display: none;
  font-size: 12px;
  height: 20px;
  left: 50%;
  line-height: 20px;
  margin-left: -25px;
  margin-top: -10px;
  position: absolute;
  text-align: center;
  top: 50%;
  width: 50px;
}

.viewer-title {
  color: #ccc;
  display: inline-block;
  font-size: 12px;
  line-height: 1.2;
  margin: 5px 5%;
  max-width: 90%;
  min-height: 14px;
  opacity: 0.8;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: opacity 0.15s;
  white-space: nowrap;
}

.viewer-title:hover {
  opacity: 1;
}

.viewer-button {
  -webkit-app-region: no-drag;
  background-color: rgba(0, 0, 0, 0.5);
  border-radius: 50%;
  cursor: pointer;
  height: 80px;
  overflow: hidden;
  position: absolute;
  right: -40px;
  top: -40px;
  transition: background-color 0.15s;
  width: 80px;
}

.viewer-button:focus,
.viewer-button:hover {
  background-color: rgba(0, 0, 0, 0.8);
}

.viewer-button:focus {
  box-shadow: 0 0 3px #fff;
  outline: 0;
}

.viewer-button::before {
  bottom: 15px;
  left: 15px;
  position: absolute;
}

.viewer-fixed {
  position: fixed;
}

.viewer-open {
  overflow: hidden;
}

.viewer-show {
  display: block;
}

.viewer-hide {
  display: none;
}

.viewer-backdrop {
  background-color: rgba(0, 0, 0, 0.5);
}

.viewer-invisible {
  visibility: hidden;
}

.viewer-move {
  cursor: move;
  cursor: grab;
}

.viewer-fade {
  opacity: 0;
}

.viewer-in {
  opacity: 1;
}

.viewer-transition {
  transition: all 0.3s;
}

@keyframes viewer-spinner {
  0% {
    transform: rotate(0deg);
  }

  100% {
    transform: rotate(360deg);
  }
}

.viewer-loading::after {
  animation: viewer-spinner 1s linear infinite;
  border: 4px solid rgba(255, 255, 255, 0.1);
  border-left-color: rgba(255, 255, 255, 0.5);
  border-radius: 50%;
  content: '';
  display: inline-block;
  height: 40px;
  left: 50%;
  margin-left: -20px;
  margin-top: -20px;
  position: absolute;
  top: 50%;
  width: 40px;
  z-index: 1;
}

@media (max-width: 767px) {
  .viewer-hide-xs-down {
    display: none;
  }
}

@media (max-width: 991px) {
  .viewer-hide-sm-down {
    display: none;
  }
}

@media (max-width: 1199px) {
  .viewer-hide-md-down {
    display: none;
  }
}
  `;
  document.head.appendChild(styleElement);
})();