Fix edit media modal on small screens, touch events (mastodon#11573)

Author: Gargron

app/javascript/mastodon/features/ui/components/focal_point_modal.js

@@ -84,6 +84,14 @@ class FocalPointModal extends ImmutablePureComponent {
     this.setState({ dragging: true });
   }
 
+  handleTouchStart = e => {
+    document.addEventListener('touchmove', this.handleMouseMove);
+    document.addEventListener('touchend', this.handleTouchEnd);
+
+    this.updatePosition(e);
+    this.setState({ dragging: true });
+  }
+
   handleMouseMove = e => {
     this.updatePosition(e);
   }
@@ -95,6 +103,13 @@ class FocalPointModal extends ImmutablePureComponent {
     this.setState({ dragging: false });
   }
 
+  handleTouchEnd = () => {
+    document.removeEventListener('touchmove', this.handleMouseMove);
+    document.removeEventListener('touchend', this.handleTouchEnd);
+
+    this.setState({ dragging: false });
+  }
+
   updatePosition = e => {
     const { x, y } = getPointerPosition(this.node, e);
     const focusX   = (x - .5) *  2;
@@ -225,7 +240,7 @@ class FocalPointModal extends ImmutablePureComponent {
                 </div>
 
                 <div className='focal-point__reticle' style={{ top: `${y * 100}%`, left: `${x * 100}%` }} />
-                <div className='focal-point__overlay' onMouseDown={this.handleMouseDown} />
+                <div className='focal-point__overlay' onMouseDown={this.handleMouseDown} onTouchStart={this.handleTouchStart} />
               </div>
             )}
 

app/javascript/styles/mastodon/basics.scss

@@ -150,7 +150,7 @@ button {
 .layout-single-column .app-holder {
   &,
   & > div {
-    min-height: 100%;
+    min-height: 100vh;
   }
 }
 

app/javascript/styles/mastodon/components.scss

@@ -5757,6 +5757,11 @@ noscript {
   position: relative;
   cursor: move;
   overflow: hidden;
+  height: 100%;
+  display: flex;
+  justify-content: center;
+  align-items: center;
+  background: $base-shadow-color;
 
   img,
   video {
@@ -5807,6 +5812,17 @@ noscript {
       box-shadow: 0 0 14px rgba($base-shadow-color, 0.2);
     }
   }
+
+  @media screen and (max-width: 480px) {
+    img,
+    video {
+      max-height: 100%;
+    }
+
+    &__preview {
+      display: none;
+    }
+  }
 }
 
 .account__header__content {