[RFC] Improved media modal (#5956)

* Improved media modal

ImageLoader: Impliment pinch zoom by CSS `transform: scale(X)`
ImageLoader: Impliment panning by CSS `overflow: scroll`
ImageLoader: Larger image
MediaModal: Larger close button
MediaModal: Close the modal by swiping vertically
MediaModal: Show/hide close button and right/left navigation on tapping image
MediaModal: Change the `pointer-event` CSS prpp to get more blank space to close the modal
ImageLoader: Zoom/reset zoom on double tap
MediaModal: disable vertical swiping while horizontally swiped
ImageLoader: prevent propagating touchmove event to MediaModal
MediaModal: Adjust size and potision of buttons
ImageLoader: Adjust scroll potision on pinch zoom

* Remove "swipe to close" and "double tap to zoom" features

* remove unused prop and functions

removed `onScroll` prop and `handleScroll` func in ImageLoader

* separate zoom functionary to ZoomableImage component

adjust styling of ImageLoader
add styling for ZoomableImage

* adjust size and potision of close button of media modal

* Fix for gif video

add `onClick` prop to ExtendedVideoPlayer
specify `onClick` prop to video tag for switching nav of `MediaModal`
add `.video-modal` class to scss to separate styling for `VideoModal`

* fix styling for centering

specify height of `ZoomableImage` by pixel
clean styling for `ImageLoader`

* fix lint errors

* small fix

* fixed designated parts

app/javascript/styles/mastodon/components.scss

@@ -1433,36 +1433,29 @@
 
 .image-loader {
   position: relative;
+  width: 100%;
+  height: 100%;
 
   &.image-loader--loading {
+    display: flex;
+    align-content: center;
+
     .image-loader__preview-canvas {
       filter: blur(2px);
     }
   }
 
-  .image-loader__img {
-    position: absolute;
-    top: 0;
-    left: 0;
-    right: 0;
-    max-width: 100%;
-    max-height: 100%;
-    background-image: none;
+  &.image-loader--amorphous .image-loader__preview-canvas {
+    display: none;
   }
+}
 
-  &.image-loader--amorphous {
-    position: static;
-
-    .image-loader__preview-canvas {
-      display: none;
-    }
-
-    .image-loader__img {
-      position: static;
-      width: auto;
-      height: auto;
-    }
-  }
+.zoomable-image {
+  position: relative;
+  width: 100%;
+  height: 100%;
+  display: flex;
+  align-content: center;
 }
 
 .navigation-bar {
@@ -2799,29 +2792,6 @@ a.status-card {
   }
 }
 
-.modal-container__nav {
-  align-items: center;
-  background: rgba($base-overlay-background, 0.5);
-  box-sizing: border-box;
-  border: 0;
-  color: $primary-text-color;
-  cursor: pointer;
-  display: flex;
-  font-size: 24px;
-  height: 100%;
-  padding: 30px 15px;
-  position: absolute;
-  top: 0;
-}
-
-.modal-container__nav--left {
-  left: -61px;
-}
-
-.modal-container__nav--right {
-  right: -61px;
-}
-
 .account--follows-info {
   color: $primary-text-color;
   position: absolute;
@@ -3418,29 +3388,27 @@ a.status-card {
   z-index: 9999;
 }
 
+.video-modal {
+  max-width: 100vw;
+  max-height: 100vh;
+  position: relative;
+}
+
 .media-modal {
-  max-width: 80vw;
-  max-height: 80vh;
+  width: 100%;
+  height: 100%;
   position: relative;
 
-  .extended-video-player,
   img,
   canvas,
   video {
-    max-width: 80vw;
-    max-height: 80vh;
+    max-width: 100vw;
+    max-height: 100vh;
     width: auto;
     height: auto;
     margin: auto;
   }
 
-  .extended-video-player,
-  video {
-    display: flex;
-    width: 80vw;
-    height: 80vh;
-  }
-
   img,
   canvas {
     display: block;
@@ -3449,12 +3417,65 @@ a.status-card {
   }
 
   .react-swipeable-view-container {
-    max-width: 80vw;
+    width: 100vw;
+    height: 100%;
   }
 }
 
-.media-modal__content {
-  background: $base-overlay-background;
+.media-modal__closer {
+  position: absolute;
+  top: 0;
+  left: 0;
+  right: 0;
+  bottom: 0;
+}
+
+.media-modal__navigation {
+  position: absolute;
+  top: 0;
+  left: 0;
+  right: 0;
+  bottom: 0;
+  pointer-events: none;
+  transition: opacity 0.3s linear;
+  will-change: opacity;
+
+  * {
+    pointer-events: auto;
+  }
+
+  &.media-modal__navigation--hidden {
+    opacity: 0;
+
+    * {
+      pointer-events: none;
+    }
+  }
+}
+
+.media-modal__nav {
+  background: rgba($base-overlay-background, 0.5);
+  box-sizing: border-box;
+  border: 0;
+  color: $primary-text-color;
+  cursor: pointer;
+  display: flex;
+  align-items: center;
+  font-size: 24px;
+  height: 20vmax;
+  margin: auto 0;
+  padding: 30px 15px;
+  position: absolute;
+  top: 0;
+  bottom: 0;
+}
+
+.media-modal__nav--left {
+  left: 0;
+}
+
+.media-modal__nav--right {
+  right: 0;
 }
 
 .media-modal__pagination {
@@ -3462,7 +3483,8 @@ a.status-card {
   text-align: center;
   position: absolute;
   left: 0;
-  bottom: -40px;
+  bottom: 20px;
+  pointer-events: none;
 }
 
 .media-modal__page-dot {
@@ -3486,8 +3508,8 @@ a.status-card {
 
 .media-modal__close {
   position: absolute;
-  right: 4px;
-  top: 4px;
+  right: 8px;
+  top: 8px;
   z-index: 100;
 }