Make media openable with the openLinks keybind

This involved a refactoring to move all the media handling functions
(downloading, opening externally, etc) out of the Event delegates and
into the EventList, which manage keybinds instead.

This should also be better for performance since all these functions are
no longer duplicated for every Event in view.

Other user-noticable change: clicking on non-image media will
always download and open them no matter if the room is encrypted or not,
instead of opening non-encrypted files in browser like before. It will
be possible to still do that with an "open externally" command later.

src/gui/Pages/Chat/Timeline/EventImage.qml

@@ -1,6 +1,7 @@
 // SPDX-License-Identifier: LGPL-3.0-or-later
 
 import QtQuick 2.12
+import "../../.."
 import "../../../Base"
 
 HMxcImage {
@@ -8,8 +9,6 @@ HMxcImage {
 
     property EventMediaLoader loader
 
-    readonly property bool isEncrypted: ! utils.isEmptyObject(cryptDict)
-
     readonly property real maxHeight:
         eventList.height * theme.chat.message.thumbnailMaxHeightRatio
 
@@ -43,69 +42,13 @@ HMxcImage {
         Math.max(maxHeight, theme.chat.message.thumbnailMinSize.height),
     )
 
-    function getOpenUrl(callback) {
-        if (image.isEncrypted && loader.mediaUrl) {
-            loader.download(callback)
-            return
-        }
-
-        if (image.isEncrypted) {
-            callback(image.cachedPath)
-            return
-        }
-
-        const toOpen = loader.mediaUrl || loader.thumbnailMxc
-        const isMxc  = toOpen.startsWith("mxc://")
-
-        isMxc ?
-        py.callClientCoro(chat.userId, "mxc_to_http", [toOpen], callback) :
-        callback(toOpen)
-    }
-
-    function openUrlExternally() {
-        getOpenUrl(Qt.openUrlExternally)
-    }
-
-    function openImageViewer() {
-        utils.makePopup(
-            "Popups/ImageViewerPopup.qml",
-            {
-                thumbnailTitle: loader.thumbnailTitle,
-                thumbnailMxc: loader.thumbnailMxc,
-                thumbnailPath: image.cachedPath,
-                thumbnailCryptDict:
-                    JSON.parse(loader.singleMediaInfo.thumbnail_crypt_dict),
-
-                fullTitle: loader.title,
-                // The thumbnail/cached path will be the full GIF
-                fullMxc: animated ? "" : loader.mediaUrl,
-                fullCryptDict:
-                    JSON.parse(loader.singleMediaInfo.media_crypt_dict),
-
-                overallSize: Qt.size(
-                    loader.singleMediaInfo.media_width ||
-                    loader.singleMediaInfo.thumbnail_width ||
-                    implicitWidth ||
-                    800,
-
-                    loader.singleMediaInfo.media_height ||
-                    loader.singleMediaInfo.thumbnail_height ||
-                    implicitHeight ||
-                    600,
-                )
-            },
-            obj => { obj.openExternallyRequested.connect(openUrlExternally) },
-        )
-    }
-
 
     width: fitSize.width
     height: fitSize.height
     horizontalAlignment: Image.AlignLeft
 
     title: thumbnail ? loader.thumbnailTitle : loader.title
-    animated: loader.singleMediaInfo.media_mime === "image/gif" ||
-              utils.urlExtension(loader.mediaUrl).toLowerCase() === "gif"
+    animated: eventList.isAnimated(loader.singleMediaInfo)
     thumbnail: ! animated && loader.thumbnailMxc
     mxc: thumbnail ?
          (loader.thumbnailMxc || loader.mediaUrl) :
@@ -116,30 +59,36 @@ HMxcImage {
         loader.singleMediaInfo.media_crypt_dict
     )
 
+    onCachedPathChanged:
+        eventList.thumbnailCachedPaths[loader.singleMediaInfo.id] = cachedPath
+
     TapHandler {
         acceptedButtons: Qt.LeftButton
         acceptedModifiers: Qt.NoModifier
+        gesturePolicy: TapHandler.ReleaseWithinBounds
         onTapped:
             eventList.selectedCount ?
             eventDelegate.toggleChecked() :
-            openImageViewer()
+            eventList.openImageViewer(singleMediaInfo)
 
-        gesturePolicy: TapHandler.ReleaseWithinBounds
     }
 
     TapHandler {
         acceptedButtons: Qt.MiddleButton
         acceptedModifiers: Qt.NoModifier
-        onTapped: getOpenUrl(Qt.openUrlExternally)
         gesturePolicy: TapHandler.ReleaseWithinBounds
+        onTapped: {
+            loader.isMedia ?
+            eventList.openMediaExternally(singleMediaInfo) :
+            Qt.openUrlExternally(loader.mediaUrl)
+        }
     }
 
     TapHandler {
         acceptedModifiers: Qt.ShiftModifier
+        gesturePolicy: TapHandler.ReleaseWithinBounds
         onTapped:
             eventList.checkFromLastToHere(singleMediaInfo.index)
-
-        gesturePolicy: TapHandler.ReleaseWithinBounds
     }
 
     HoverHandler {
@@ -151,8 +100,9 @@ HMxcImage {
             }
 
             eventDelegate.hoveredMediaTypeUrl = [
-                EventDelegate.Media.Image,
-                loader.downloadedPath.replace(/^file:\/\//, "") ||
+                Utils.Media.Image,
+                // XXX
+                // loader.downloadedPath.replace(/^file:\/\//, "") ||
                 loader.mediaUrl
             ]
         }