File drop UI fixes and improvements

res/css/structures/_MainSplit.scss

@@ -18,6 +18,7 @@ limitations under the License.
     display: flex;
     flex-direction: row;
     min-width: 0;
+    min-height: 0;
     height: 100%;
 }
 

res/css/structures/_RoomView.scss

@@ -20,35 +20,54 @@ limitations under the License.
     flex-direction: column;
 }
 
+
+@keyframes mx_RoomView_fileDropTarget_animation {
+    from {
+        opacity: 0;
+    }
+    to {
+        opacity: 0.95;
+    }
+}
+
 .mx_RoomView_fileDropTarget {
     min-width: 0px;
     width: 100%;
+    height: 100%;
+
     font-size: $font-18px;
     text-align: center;
 
     pointer-events: none;
 
-    padding-left: 12px;
-    padding-right: 12px;
-    margin-left: -12px;
-
-    border-top-left-radius: 10px;
-    border-top-right-radius: 10px;
+    background-color: $primary-bg-color;
+    opacity: 0.95;
 
-    background-color: $droptarget-bg-color;
-    border: 2px #e1dddd solid;
-    border-bottom: none;
     position: absolute;
-    top: 52px;
-    bottom: 0px;
     z-index: 3000;
+
+    display: flex;
+    flex-direction: column;
+    justify-content: center;
+    align-items: center;
+
+    animation: mx_RoomView_fileDropTarget_animation;
+    animation-duration: 0.5s;
 }
 
-.mx_RoomView_fileDropTargetLabel {
-    top: 50%;
-    width: 100%;
-    margin-top: -50px;
-    position: absolute;
+@keyframes mx_RoomView_fileDropTarget_image_animation {
+    from {
+        width: 0px;
+    }
+    to {
+        width: 32px;
+    }
+}
+
+.mx_RoomView_fileDropTarget_image {
+    animation: mx_RoomView_fileDropTarget_image_animation;
+    animation-duration: 0.5s;
+    margin-bottom: 16px;
 }
 
 .mx_RoomView_auxPanel {
@@ -117,7 +136,6 @@ limitations under the License.
 }
 
 .mx_RoomView_body {
-    position: relative; //for .mx_RoomView_auxPanel_fullHeight
     display: flex;
     flex-direction: column;
     flex: 1;

res/themes/light/css/_light.scss

@@ -67,9 +67,6 @@ $groupFilterPanel-bg-color: rgba(232, 232, 232, 0.77);
 // used by RoomDirectory permissions
 $plinth-bg-color: $secondary-accent-color;
 
-// used by RoomDropTarget
-$droptarget-bg-color: rgba(255,255,255,0.5);
-
 // used by AddressSelector
 $selected-color: $secondary-accent-color;
 

src/components/structures/RoomView.tsx

@@ -189,6 +189,7 @@ export interface IState {
     rejecting?: boolean;
     rejectError?: Error;
     hasPinnedWidgets?: boolean;
+    dragCounter: number;
 }
 
 export default class RoomView extends React.Component<IProps, IState> {
@@ -239,6 +240,7 @@ export default class RoomView extends React.Component<IProps, IState> {
             canReply: false,
             layout: SettingsStore.getValue("layout"),
             matrixClientIsReady: this.context && this.context.isInitialSyncComplete(),
+            dragCounter: 0,
         };
 
         this.dispatcherRef = dis.register(this.onAction);
@@ -533,8 +535,8 @@ export default class RoomView extends React.Component<IProps, IState> {
             if (!roomView.ondrop) {
                 roomView.addEventListener('drop', this.onDrop);
                 roomView.addEventListener('dragover', this.onDragOver);
-                roomView.addEventListener('dragleave', this.onDragLeaveOrEnd);
-                roomView.addEventListener('dragend', this.onDragLeaveOrEnd);
+                roomView.addEventListener('dragenter', this.onDragEnter);
+                roomView.addEventListener('dragleave', this.onDragLeave);
             }
         }
 
@@ -578,8 +580,8 @@ export default class RoomView extends React.Component<IProps, IState> {
             const roomView = this.roomView.current;
             roomView.removeEventListener('drop', this.onDrop);
             roomView.removeEventListener('dragover', this.onDragOver);
-            roomView.removeEventListener('dragleave', this.onDragLeaveOrEnd);
-            roomView.removeEventListener('dragend', this.onDragLeaveOrEnd);
+            roomView.removeEventListener('dragenter', this.onDragEnter);
+            roomView.removeEventListener('dragleave', this.onDragLeave);
         }
         dis.unregister(this.dispatcherRef);
         if (this.context) {
@@ -1139,14 +1141,38 @@ export default class RoomView extends React.Component<IProps, IState> {
         this.updateTopUnreadMessagesBar();
     };
 
+    private onDragEnter = ev => {
+        ev.stopPropagation();
+        ev.preventDefault();
+
+        this.setState({
+            dragCounter: this.state.dragCounter + 1,
+            draggingFile: true,
+        });
+    };
+
+    private onDragLeave = ev => {
+        ev.stopPropagation();
+        ev.preventDefault();
+
+        this.setState({
+            dragCounter: this.state.dragCounter - 1,
+        });
+
+        if (this.state.dragCounter === 0) {
+            this.setState({
+                draggingFile: false,
+            });
+        }
+    };
+
     private onDragOver = ev => {
         ev.stopPropagation();
         ev.preventDefault();
 
         ev.dataTransfer.dropEffect = 'none';
 
         if (ev.dataTransfer.types.includes("Files") || ev.dataTransfer.types.includes("application/x-moz-file")) {
-            this.setState({ draggingFile: true });
             ev.dataTransfer.dropEffect = 'copy';
         }
     };
@@ -1157,14 +1183,12 @@ export default class RoomView extends React.Component<IProps, IState> {
         ContentMessages.sharedInstance().sendContentListToRoom(
             ev.dataTransfer.files, this.state.room.roomId, this.context,
         );
-        this.setState({ draggingFile: false });
         dis.fire(Action.FocusComposer);
-    };
 
-    private onDragLeaveOrEnd = ev => {
-        ev.stopPropagation();
-        ev.preventDefault();
-        this.setState({ draggingFile: false });
+        this.setState({
+            draggingFile: false,
+            dragCounter: this.state.dragCounter - 1,
+        });
     };
 
     private injectSticker(url, info, text) {
@@ -1758,6 +1782,19 @@ export default class RoomView extends React.Component<IProps, IState> {
             }
         }
 
+        let fileDropTarget = null;
+        if (this.state.draggingFile) {
+            fileDropTarget = (
+                <div className="mx_RoomView_fileDropTarget">
+                    <img
+                        src={require("../../../res/img/upload-big.svg")}
+                        className="mx_RoomView_fileDropTarget_image"
+                    />
+                    { _t("Drop file here to upload") }
+                </div>
+            );
+        }
+
         // We have successfully loaded this room, and are not previewing.
         // Display the "normal" room view.
 
@@ -1869,7 +1906,6 @@ export default class RoomView extends React.Component<IProps, IState> {
                 room={this.state.room}
                 fullHeight={false}
                 userId={this.context.credentials.userId}
-                draggingFile={this.state.draggingFile}
                 maxHeight={this.state.auxPanelMaxHeight}
                 showApps={this.state.showApps}
                 onResize={this.onResize}
@@ -2037,6 +2073,7 @@ export default class RoomView extends React.Component<IProps, IState> {
                             <div className="mx_RoomView_body">
                                 {auxPanel}
                                 <div className={timelineClasses}>
+                                    {fileDropTarget}
                                     {topUnreadMessagesBar}
                                     {jumpToBottom}
                                     {messagePanel}

src/components/views/rooms/AuxPanel.tsx

@@ -17,11 +17,9 @@ limitations under the License.
 import React from 'react';
 import {MatrixClientPeg} from "../../../MatrixClientPeg";
 import { Room } from 'matrix-js-sdk/src/models/room'
-import * as sdk from '../../../index';
 import dis from "../../../dispatcher/dispatcher";
 import * as ObjectUtils from '../../../ObjectUtils';
 import AppsDrawer from './AppsDrawer';
-import { _t } from '../../../languageHandler';
 import classNames from 'classnames';
 import RateLimitedFunc from '../../../ratelimitedfunc';
 import SettingsStore from "../../../settings/SettingsStore";
@@ -36,9 +34,6 @@ interface IProps {
     userId: string,
     showApps: boolean, // Render apps
 
-    // set to true to show the file drop target
-    draggingFile: boolean,
-
     // maxHeight attribute for the aux panel and the video
     // therein
     maxHeight: number,
@@ -150,21 +145,6 @@ export default class AuxPanel extends React.Component<IProps, IState> {
     }
 
     render() {
-        const TintableSvg = sdk.getComponent("elements.TintableSvg");
-
-        let fileDropTarget = null;
-        if (this.props.draggingFile) {
-            fileDropTarget = (
-                <div className="mx_RoomView_fileDropTarget">
-                    <div className="mx_RoomView_fileDropTargetLabel" title={_t("Drop File Here")}>
-                        <TintableSvg src={require("../../../../res/img/upload-big.svg")} width="45" height="59" />
-                        <br />
-                        { _t("Drop file here to upload") }
-                    </div>
-                </div>
-            );
-        }
-
         const callView = (
             <CallViewForRoom
                 roomId={this.props.room.roomId}
@@ -247,7 +227,6 @@ export default class AuxPanel extends React.Component<IProps, IState> {
             <AutoHideScrollbar className={classes} style={style} >
                 { stateViews }
                 { appsDrawer }
-                { fileDropTarget }
                 { callView }
                 { this.props.children }
             </AutoHideScrollbar>

src/contexts/RoomContext.ts

@@ -43,6 +43,7 @@ const RoomContext = createContext<IState>({
     canReply: false,
     layout: Layout.Group,
     matrixClientIsReady: false,
+    dragCounter: 0,
 });
 RoomContext.displayName = "RoomContext";
 export default RoomContext;

src/i18n/strings/en_EN.json

@@ -1381,8 +1381,6 @@
     "Remove %(phone)s?": "Remove %(phone)s?",
     "A text message has been sent to +%(msisdn)s. Please enter the verification code it contains.": "A text message has been sent to +%(msisdn)s. Please enter the verification code it contains.",
     "Phone Number": "Phone Number",
-    "Drop File Here": "Drop File Here",
-    "Drop file here to upload": "Drop file here to upload",
     "This user has not verified all of their sessions.": "This user has not verified all of their sessions.",
     "You have not verified this user.": "You have not verified this user.",
     "You have verified this user. This user has verified all of their sessions.": "You have verified this user. This user has verified all of their sessions.",
@@ -2514,6 +2512,7 @@
     "No more results": "No more results",
     "Room": "Room",
     "Failed to reject invite": "Failed to reject invite",
+    "Drop file here to upload": "Drop file here to upload",
     "You have %(count)s unread notifications in a prior version of this room.|other": "You have %(count)s unread notifications in a prior version of this room.",
     "You have %(count)s unread notifications in a prior version of this room.|one": "You have %(count)s unread notification in a prior version of this room.",
     "Tried to load a specific point in this room's timeline, but you do not have permission to view the message in question.": "Tried to load a specific point in this room's timeline, but you do not have permission to view the message in question.",