Display thumbnail for all files and add commands to download and open files

16 files changed, 224 insertions, 100 deletions

diff --git a/config/config.go b/config/config.go
index e8c7b1a..3507833 100644
--- a/config/config.go
+++ b/config/config.go
@@ -66,6 +66,7 @@ type Config struct {
 	HistoryPath  string `yaml:"history_path"`
 	RoomListPath string `yaml:"room_list_path"`
 	MediaDir     string `yaml:"media_dir"`
+	DownloadDir  string `yaml:"download_dir"`
 	StateDir     string `yaml:"state_dir"`
 
 	Preferences UserPreferences        `yaml:"-"`
@@ -78,6 +79,7 @@ type Config struct {
 
 // NewConfig creates a config that loads data from the given directory.
 func NewConfig(configDir, cacheDir string) *Config {
+	home, _ := os.UserHomeDir()
 	return &Config{
 		Dir:          configDir,
 		CacheDir:     cacheDir,
@@ -85,6 +87,7 @@ func NewConfig(configDir, cacheDir string) *Config {
 		RoomListPath: filepath.Join(cacheDir, "rooms.gob.gz"),
 		StateDir:     filepath.Join(cacheDir, "state"),
 		MediaDir:     filepath.Join(cacheDir, "media"),
+		DownloadDir:  home,
 
 		RoomCacheSize: 32,
 		RoomCacheAge:  1 * 60,
diff --git a/go.mod b/go.mod
index 137267a..6daa947 100644
--- a/go.mod
+++ b/go.mod
@@ -21,7 +21,7 @@ require (
 	golang.org/x/net v0.0.0-20200301022130-244492dfa37a
 	gopkg.in/toast.v1 v1.0.0-20180812000517-0a84660828b2
 	gopkg.in/yaml.v2 v2.2.8
-	maunium.net/go/mautrix v0.1.0-beta.2.0.20200403220206-c81fdd9fe68f
+	maunium.net/go/mautrix v0.1.0-beta.2.0.20200408115320-100bcaabf80b
 	maunium.net/go/mauview v0.1.0-beta.1
 	maunium.net/go/tcell v0.1.0
 )
diff --git a/go.sum b/go.sum
index 371b37c..60af87a 100644
--- a/go.sum
+++ b/go.sum
@@ -79,6 +79,8 @@ maunium.net/go/mautrix v0.1.0-beta.1.0.20200320135656-32dd5f172592 h1:WybA4BBUyo
 maunium.net/go/mautrix v0.1.0-beta.1.0.20200320135656-32dd5f172592/go.mod h1:YFMU9DBeXH7cqx7sJLg0DkVxwNPbih8QbpUTYf/IjMM=
 maunium.net/go/mautrix v0.1.0-beta.2.0.20200403220206-c81fdd9fe68f h1:Fg7t2i+AtUX4NDN5Ue9HsHO/Vog0JN9CZsOH3u+hDOc=
 maunium.net/go/mautrix v0.1.0-beta.2.0.20200403220206-c81fdd9fe68f/go.mod h1:YFMU9DBeXH7cqx7sJLg0DkVxwNPbih8QbpUTYf/IjMM=
+maunium.net/go/mautrix v0.1.0-beta.2.0.20200408115320-100bcaabf80b h1:ifTLB2qPUcZmeCeh2/CvlBZz/ddrdXcszdH7H9qFHzE=
+maunium.net/go/mautrix v0.1.0-beta.2.0.20200408115320-100bcaabf80b/go.mod h1:YFMU9DBeXH7cqx7sJLg0DkVxwNPbih8QbpUTYf/IjMM=
 maunium.net/go/mauview v0.1.0-beta.1 h1:hRprD6NTi5Mw7i97DKmgs/TzFQeNpGPytPoswNlU/Ww=
 maunium.net/go/mauview v0.1.0-beta.1/go.mod h1:og9WbzmWe9SNYNyOFlCv8qa9zMcOvG2nzRJ5vYyud9U=
 maunium.net/go/tcell v0.1.0 h1:XzsEoGCvOw5nac+tlkSLzQcliLYTN4PrtA7ar2ptjSM=
diff --git a/interface/matrix.go b/interface/matrix.go
index d4351d7..34d8f7f 100644
--- a/interface/matrix.go
+++ b/interface/matrix.go
@@ -17,6 +17,7 @@
 package ifc
 
 import (
+	"maunium.net/go/gomuks/config"
 	"maunium.net/go/gomuks/matrix/event"
 	"maunium.net/go/mautrix"
 
@@ -24,12 +25,13 @@ import (
 )
 
 type Relation struct {
-	Type mautrix.RelationType
+	Type  mautrix.RelationType
 	Event *event.Event
 }
 
 type MatrixContainer interface {
 	Client() *mautrix.Client
+	Preferences() *config.UserPreferences
 	InitClient() error
 	Initialized() bool
 
@@ -55,7 +57,8 @@ type MatrixContainer interface {
 	GetRoom(roomID string) *rooms.Room
 	GetOrCreateRoom(roomID string) *rooms.Room
 
-	Download(mxcURL string) ([]byte, string, string, error)
-	GetDownloadURL(homeserver, fileID string) string
-	GetCachePath(homeserver, fileID string) string
+	Download(uri mautrix.ContentURI) ([]byte, error)
+	DownloadToDisk(uri mautrix.ContentURI, target string) (string, error)
+	GetDownloadURL(uri mautrix.ContentURI) string
+	GetCachePath(uri mautrix.ContentURI) string
 }
diff --git a/matrix/matrix.go b/matrix/matrix.go
index 852a410..651f6bb 100644
--- a/matrix/matrix.go
+++ b/matrix/matrix.go
@@ -29,7 +29,6 @@ import (
 	"os"
 	"path"
 	"path/filepath"
-	"regexp"
 	"runtime"
 	dbg "runtime/debug"
 	"time"
@@ -389,6 +388,10 @@ func (c *Container) HandlePreferences(source EventSource, evt *mautrix.Event) {
 	}
 }
 
+func (c *Container) Preferences() *config.UserPreferences {
+	return &c.config.Preferences
+}
+
 func (c *Container) SendPreferencesToMatrix() {
 	defer debug.Recover()
 	debug.Print("Sending updated preferences:", c.config.Preferences)
@@ -926,22 +929,73 @@ func (c *Container) GetRoom(roomID string) *rooms.Room {
 	return c.config.Rooms.Get(roomID)
 }
 
-var mxcRegex = regexp.MustCompile("mxc://(.+)/(.+)")
+func cp(src, dst string) error {
+	in, err := os.Open(src)
+	if err != nil {
+		return err
+	}
+	defer in.Close()
 
-// Download fetches the given Matrix content (mxc) URL and returns the data, homeserver, file ID and potential errors.
-//
-// The file will be either read from the media cache (if found) or downloaded from the server.
-func (c *Container) Download(mxcURL string) (data []byte, hs, id string, err error) {
-	parts := mxcRegex.FindStringSubmatch(mxcURL)
-	if parts == nil || len(parts) != 3 {
-		err = fmt.Errorf("invalid matrix content URL")
-		return
+	out, err := os.Create(dst)
+	if err != nil {
+		return err
+	}
+	defer out.Close()
+
+	_, err = io.Copy(out, in)
+	if err != nil {
+		return err
+	}
+	return out.Close()
+}
+
+func (c *Container) DownloadToDisk(uri mautrix.ContentURI, target string) (fullPath string, err error) {
+	cachePath := c.GetCachePath(uri)
+	if target == "" {
+		fullPath = cachePath
+	} else if !path.IsAbs(target) {
+		fullPath = path.Join(c.config.DownloadDir, target)
+	} else {
+		fullPath = target
+	}
+
+	if _, statErr := os.Stat(cachePath); os.IsNotExist(statErr) {
+		var file *os.File
+		file, err = os.OpenFile(cachePath, os.O_CREATE|os.O_WRONLY, 0600)
+		if err != nil {
+			return
+		}
+		defer file.Close()
+
+		var resp *http.Response
+		resp, err = c.client.Client.Get(c.GetDownloadURL(uri))
+		if err != nil {
+			return
+		}
+		defer resp.Body.Close()
+
+		_, err = io.Copy(file, resp.Body)
+		if err != nil {
+			return
+		}
 	}
 
-	hs = parts[1]
-	id = parts[2]
+	if fullPath != cachePath {
+		err = os.MkdirAll(path.Dir(fullPath), 0700)
+		if err != nil {
+			return
+		}
+		err = cp(cachePath, fullPath)
+	}
+
+	return
+}
 
-	cacheFile := c.GetCachePath(hs, id)
+// Download fetches the given Matrix content (mxc) URL and returns the data, homeserver, file ID and potential errors.
+//
+// The file will be either read from the media cache (if found) or downloaded from the server.
+func (c *Container) Download(uri mautrix.ContentURI) (data []byte, err error) {
+	cacheFile := c.GetCachePath(uri)
 	var info os.FileInfo
 	if info, err = os.Stat(cacheFile); err == nil && !info.IsDir() {
 		data, err = ioutil.ReadFile(cacheFile)
@@ -950,22 +1004,22 @@ func (c *Container) Download(mxcURL string) (data []byte, hs, id string, err err
 		}
 	}
 
-	data, err = c.download(hs, id, cacheFile)
+	data, err = c.download(uri, cacheFile)
 	return
 }
 
-func (c *Container) GetDownloadURL(hs, id string) string {
+func (c *Container) GetDownloadURL(uri mautrix.ContentURI) string {
 	dlURL, _ := url.Parse(c.client.HomeserverURL.String())
 	if dlURL.Scheme == "" {
 		dlURL.Scheme = "https"
 	}
-	dlURL.Path = path.Join(dlURL.Path, "/_matrix/media/v1/download", hs, id)
+	dlURL.Path = path.Join(dlURL.Path, "/_matrix/media/v1/download", uri.Homeserver, uri.FileID)
 	return dlURL.String()
 }
 
-func (c *Container) download(hs, id, cacheFile string) (data []byte, err error) {
+func (c *Container) download(uri mautrix.ContentURI, cacheFile string) (data []byte, err error) {
 	var resp *http.Response
-	resp, err = c.client.Client.Get(c.GetDownloadURL(hs, id))
+	resp, err = c.client.Client.Get(c.GetDownloadURL(uri))
 	if err != nil {
 		return
 	}
@@ -985,13 +1039,13 @@ func (c *Container) download(hs, id, cacheFile string) (data []byte, err error)
 
 // GetCachePath gets the path to the cached version of the given homeserver:fileID combination.
 // The file may or may not exist, use Download() to ensure it has been cached.
-func (c *Container) GetCachePath(homeserver, fileID string) string {
-	dir := filepath.Join(c.config.MediaDir, homeserver)
+func (c *Container) GetCachePath(uri mautrix.ContentURI) string {
+	dir := filepath.Join(c.config.MediaDir, uri.Homeserver)
 
 	err := os.MkdirAll(dir, 0700)
 	if err != nil {
 		return ""
 	}
 
-	return filepath.Join(dir, fileID)
+	return filepath.Join(dir, uri.FileID)
 }
diff --git a/ui/command-processor.go b/ui/command-processor.go
index 3212dae..082d157 100644
--- a/ui/command-processor.go
+++ b/ui/command-processor.go
@@ -92,6 +92,8 @@ func NewCommandProcessor(parent *MainView) *CommandProcessor {
 			"remove":     {"redact"},
 			"rm":         {"redact"},
 			"del":        {"redact"},
+			"dl":         {"download"},
+			"o":          {"open"},
 		},
 		commands: map[string]CommandHandler{
 			"unknown-command": cmdUnknownCommand,
@@ -115,6 +117,8 @@ func NewCommandProcessor(parent *MainView) *CommandProcessor {
 			"reply":      cmdReply,
 			"redact":     cmdRedact,
 			"react":      cmdReact,
+			"download":   cmdDownload,
+			"open":       cmdOpen,
 			"sendevent":  cmdSendEvent,
 			"msendevent": cmdMSendEvent,
 			"setstate":   cmdSetState,
diff --git a/ui/commands.go b/ui/commands.go
index a57a78d..a74a164 100644
--- a/ui/commands.go
+++ b/ui/commands.go
@@ -150,9 +150,11 @@ func cmdID(cmd *Command) {
 type SelectReason string
 
 const (
-	SelectReply  SelectReason = "reply to"
-	SelectReact               = "react to"
-	SelectRedact              = "redact"
+	SelectReply    SelectReason = "reply to"
+	SelectReact                 = "react to"
+	SelectRedact                = "redact"
+	SelectDownload              = "download"
+	SelectOpen                  = "open"
 )
 
 func cmdReply(cmd *Command) {
@@ -163,6 +165,14 @@ func cmdRedact(cmd *Command) {
 	cmd.Room.StartSelecting(SelectRedact, strings.Join(cmd.Args, " "))
 }
 
+func cmdDownload(cmd *Command) {
+	cmd.Room.StartSelecting(SelectDownload, strings.Join(cmd.Args, " "))
+}
+
+func cmdOpen(cmd *Command) {
+	cmd.Room.StartSelecting(SelectOpen, strings.Join(cmd.Args, " "))
+}
+
 func cmdReact(cmd *Command) {
 	if len(cmd.Args) == 0 {
 		cmd.Reply("Usage: /react <reaction>")
diff --git a/ui/message-view.go b/ui/message-view.go
index eab7bf6..4f406e1 100644
--- a/ui/message-view.go
+++ b/ui/message-view.go
@@ -349,8 +349,8 @@ func (view *MessageView) SetSelected(message *messages.UIMessage) {
 }
 
 func (view *MessageView) handleMessageClick(message *messages.UIMessage, mod tcell.ModMask) bool {
-	if msg, ok := message.Renderer.(*messages.FileMessage); ok && mod > 0 {
-		open.Open(msg.Path())
+	if msg, ok := message.Renderer.(*messages.FileMessage); ok && mod > 0 && !msg.Thumbnail.IsEmpty() {
+		open.Open(msg.ThumbnailPath())
 		// No need to re-render
 		return false
 	}
diff --git a/ui/messages/base.go b/ui/messages/base.go
index 58d9b6e..745bfcd 100644
--- a/ui/messages/base.go
+++ b/ui/messages/base.go
@@ -27,7 +27,6 @@ import (
 	"maunium.net/go/mauview"
 	"maunium.net/go/tcell"
 
-	"maunium.net/go/gomuks/interface"
 	"maunium.net/go/gomuks/ui/widget"
 )
 
@@ -36,7 +35,6 @@ type MessageRenderer interface {
 	NotificationContent() string
 	PlainText() string
 	CalculateBuffer(prefs config.UserPreferences, width int, msg *UIMessage)
-	RegisterMatrix(matrix ifc.MatrixContainer, prefs config.UserPreferences)
 	Height() int
 	Clone() MessageRenderer
 	String() string
diff --git a/ui/messages/expandedtextmessage.go b/ui/messages/expandedtextmessage.go
index c666613..bd5aba9 100644
--- a/ui/messages/expandedtextmessage.go
+++ b/ui/messages/expandedtextmessage.go
@@ -20,7 +20,6 @@ import (
 	"fmt"
 	"time"
 
-	ifc "maunium.net/go/gomuks/interface"
 	"maunium.net/go/gomuks/matrix/event"
 	"maunium.net/go/mauview"
 	"maunium.net/go/tcell"
@@ -88,5 +87,3 @@ func (msg *ExpandedTextMessage) Draw(screen mauview.Screen) {
 		line.Draw(screen, 0, y)
 	}
 }
-
-func (msg *ExpandedTextMessage) RegisterMatrix(matrix ifc.MatrixContainer, prefs config.UserPreferences) {}
diff --git a/ui/messages/filemessage.go b/ui/messages/filemessage.go
index 9fb3499..daf6c00 100644
--- a/ui/messages/filemessage.go
+++ b/ui/messages/filemessage.go
@@ -23,6 +23,7 @@ import (
 	"image/color"
 
 	"maunium.net/go/gomuks/matrix/event"
+	"maunium.net/go/mautrix"
 	"maunium.net/go/mauview"
 	"maunium.net/go/tcell"
 
@@ -34,72 +35,86 @@ import (
 )
 
 type FileMessage struct {
-	Body       string
-	Homeserver string
-	FileID     string
-	data       []byte
-	buffer     []tstring.TString
+	Type      mautrix.MessageType
+	Body      string
+	URL       mautrix.ContentURI
+	Thumbnail mautrix.ContentURI
+	imageData []byte
+	buffer    []tstring.TString
 
 	matrix ifc.MatrixContainer
 }
 
 // NewFileMessage creates a new FileMessage object with the provided values and the default state.
-func NewFileMessage(matrix ifc.MatrixContainer, evt *event.Event, displayname string, body, homeserver, fileID string, data []byte) *UIMessage {
+func NewFileMessage(matrix ifc.MatrixContainer, evt *event.Event, displayname string) *UIMessage {
+	url, _ := mautrix.ParseContentURI(evt.Content.URL)
+	thumbnail, _ := mautrix.ParseContentURI(evt.Content.GetInfo().ThumbnailURL)
 	return newUIMessage(evt, displayname, &FileMessage{
-		Body:       body,
-		Homeserver: homeserver,
-		FileID:     fileID,
-		data:       data,
-		matrix:     matrix,
+		Type:      evt.Content.MsgType,
+		Body:      evt.Content.Body,
+		URL:       url,
+		Thumbnail: thumbnail,
+		matrix:    matrix,
 	})
 }
 
 func (msg *FileMessage) Clone() MessageRenderer {
-	data := make([]byte, len(msg.data))
-	copy(data, msg.data)
+	data := make([]byte, len(msg.imageData))
+	copy(data, msg.imageData)
 	return &FileMessage{
-		Body:       msg.Body,
-		Homeserver: msg.Homeserver,
-		FileID:     msg.FileID,
-		data:       data,
-		matrix:     msg.matrix,
-	}
-}
-
-func (msg *FileMessage) RegisterMatrix(matrix ifc.MatrixContainer, prefs config.UserPreferences) {
-	msg.matrix = matrix
-
-	if len(msg.data) == 0 && !prefs.DisableDownloads {
-		go msg.updateData()
+		Body:      msg.Body,
+		URL:       msg.URL,
+		Thumbnail: msg.Thumbnail,
+		imageData: data,
+		matrix:    msg.matrix,
 	}
 }
 
 func (msg *FileMessage) NotificationContent() string {
-	return "Sent a file"
+	switch msg.Type {
+	case mautrix.MsgImage:
+		return "Sent an image"
+	case mautrix.MsgAudio:
+		return "Sent an audio file"
+	case mautrix.MsgVideo:
+		return "Sent a video"
+	case mautrix.MsgFile:
+		fallthrough
+	default:
+		return "Sent a file"
+	}
 }
 
 func (msg *FileMessage) PlainText() string {
-	return fmt.Sprintf("%s: %s", msg.Body, msg.matrix.GetDownloadURL(msg.Homeserver, msg.FileID))
+	return fmt.Sprintf("%s: %s", msg.Body, msg.matrix.GetDownloadURL(msg.URL))
 }
 
 func (msg *FileMessage) String() string {
-	return fmt.Sprintf(`&messages.FileMessage{Body="%s", Homeserver="%s", FileID="%s"}`, msg.Body, msg.Homeserver, msg.FileID)
+	return fmt.Sprintf(`&messages.FileMessage{Body="%s", URL="%s", Thumbnail="%s"}`, msg.Body, msg.URL, msg.Thumbnail)
 }
 
-func (msg *FileMessage) updateData() {
-	defer debug.Recover()
-	debug.Print("Loading file:", msg.Homeserver, msg.FileID)
-	data, _, _, err := msg.matrix.Download(fmt.Sprintf("mxc://%s/%s", msg.Homeserver, msg.FileID))
+func (msg *FileMessage) DownloadPreview() {
+	url := msg.Thumbnail
+	if url.IsEmpty() {
+		if msg.Type == mautrix.MsgImage && !msg.URL.IsEmpty() {
+			msg.Thumbnail = msg.URL
+			url = msg.Thumbnail
+		} else {
+			return
+		}
+	}
+	debug.Print("Loading file:", url)
+	data, err := msg.matrix.Download(url)
 	if err != nil {
-		debug.Printf("Failed to download file %s/%s: %v", msg.Homeserver, msg.FileID, err)
+		debug.Printf("Failed to download file %s: %v", url, err)
 		return
 	}
-	debug.Print("File", msg.Homeserver, msg.FileID, "loaded.")
-	msg.data = data
+	debug.Print("File", url, "loaded.")
+	msg.imageData = data
 }
 
-func (msg *FileMessage) Path() string {
-	return msg.matrix.GetCachePath(msg.Homeserver, msg.FileID)
+func (msg *FileMessage) ThumbnailPath() string {
+	return msg.matrix.GetCachePath(msg.Thumbnail)
 }
 
 func (msg *FileMessage) CalculateBuffer(prefs config.UserPreferences, width int, uiMsg *UIMessage) {
@@ -107,12 +122,12 @@ func (msg *FileMessage) CalculateBuffer(prefs config.UserPreferences, width int,
 		return
 	}
 
-	if prefs.BareMessageView || prefs.DisableImages || uiMsg.Type != "m.image" {
+	if prefs.BareMessageView || prefs.DisableImages || len(msg.imageData) == 0 {
 		msg.buffer = calculateBufferWithText(prefs, tstring.NewTString(msg.PlainText()), width, uiMsg)
 		return
 	}
 
-	img, _, err := image.DecodeConfig(bytes.NewReader(msg.data))
+	img, _, err := image.DecodeConfig(bytes.NewReader(msg.imageData))
 	if err != nil {
 		debug.Print("File could not be decoded:", err)
 	}
@@ -121,7 +136,7 @@ func (msg *FileMessage) CalculateBuffer(prefs config.UserPreferences, width int,
 		imgWidth = width / 3
 	}
 
-	ansFile, err := ansimage.NewScaledFromReader(bytes.NewReader(msg.data), 0, imgWidth, color.Black)
+	ansFile, err := ansimage.NewScaledFromReader(bytes.NewReader(msg.imageData), 0, imgWidth, color.Black)
 	if err != nil {
 		msg.buffer = []tstring.TString{tstring.NewColorTString("Failed to display image", tcell.ColorRed)}
 		debug.Print("Failed to display image:", err)
diff --git a/ui/messages/htmlmessage.go b/ui/messages/htmlmessage.go
index ff49e57..af3ce41 100644
--- a/ui/messages/htmlmessage.go
+++ b/ui/messages/htmlmessage.go
@@ -17,7 +17,6 @@
 package messages
 
 import (
-	ifc "maunium.net/go/gomuks/interface"
 	"maunium.net/go/gomuks/matrix/event"
 	"maunium.net/go/mauview"
 	"maunium.net/go/tcell"
@@ -39,8 +38,6 @@ func NewHTMLMessage(evt *event.Event, displayname string, root html.Entity) *UIM
 	})
 }
 
-func (hw *HTMLMessage) RegisterMatrix(matrix ifc.MatrixContainer, prefs config.UserPreferences) {}
-
 func (hw *HTMLMessage) Clone() MessageRenderer {
 	return &HTMLMessage{
 		Root:      hw.Root.Clone(),
diff --git a/ui/messages/parser.go b/ui/messages/parser.go
index 1c145e5..d0bc6e0 100644
--- a/ui/messages/parser.go
+++ b/ui/messages/parser.go
@@ -24,7 +24,6 @@ import (
 	"maunium.net/go/mautrix"
 	"maunium.net/go/tcell"
 
-	"maunium.net/go/gomuks/debug"
 	"maunium.net/go/gomuks/interface"
 	"maunium.net/go/gomuks/matrix/rooms"
 	"maunium.net/go/gomuks/ui/messages/html"
@@ -132,18 +131,19 @@ func ParseMessage(matrix ifc.MatrixContainer, room *rooms.Room, evt *event.Event
 		evt.Content = *evt.Gomuks.Edits[len(evt.Gomuks.Edits)-1].Content.NewContent
 	}
 	switch evt.Content.MsgType {
-	case "m.text", "m.notice", "m.emote":
+	case mautrix.MsgText, mautrix.MsgNotice, mautrix.MsgEmote:
 		if evt.Content.Format == mautrix.FormatHTML {
 			return NewHTMLMessage(evt, displayname, html.Parse(room, evt, displayname))
 		}
 		evt.Content.Body = strings.Replace(evt.Content.Body, "\t", "    ", -1)
 		return NewTextMessage(evt, displayname, evt.Content.Body)
-	case "m.file", "m.video", "m.audio", "m.image":
-		data, hs, id, err := matrix.Download(evt.Content.URL)
-		if err != nil {
-			debug.Printf("Failed to download %s: %v", evt.Content.URL, err)
+	case mautrix.MsgImage, mautrix.MsgVideo, mautrix.MsgAudio, mautrix.MsgFile:
+		msg := NewFileMessage(matrix, evt, displayname)
+		if !matrix.Preferences().DisableDownloads {
+			renderer := msg.Renderer.(*FileMessage)
+			renderer.DownloadPreview()
 		}
-		return NewFileMessage(matrix, evt, displayname, evt.Content.Body, hs, id, data)
+		return msg
 	}
 	return nil
 }
diff --git a/ui/messages/redactedmessage.go b/ui/messages/redactedmessage.go
index 56b4822..34d880b 100644
--- a/ui/messages/redactedmessage.go
+++ b/ui/messages/redactedmessage.go
@@ -17,7 +17,6 @@
 package messages
 
 import (
-	ifc "maunium.net/go/gomuks/interface"
 	"maunium.net/go/gomuks/matrix/event"
 	"maunium.net/go/mauview"
 	"maunium.net/go/tcell"
@@ -64,5 +63,3 @@ func (msg *RedactedMessage) Draw(screen mauview.Screen) {
 		screen.SetContent(x, 0, RedactionChar, nil, RedactionStyle)
 	}
 }
-
-func (msg *RedactedMessage) RegisterMatrix(matrix ifc.MatrixContainer, prefs config.UserPreferences) {}
diff --git a/ui/messages/textmessage.go b/ui/messages/textmessage.go
index 0bfa27b..2e59c8f 100644
--- a/ui/messages/textmessage.go
+++ b/ui/messages/textmessage.go
@@ -20,7 +20,6 @@ import (
 	"fmt"
 	"time"
 
-	ifc "maunium.net/go/gomuks/interface"
 	"maunium.net/go/gomuks/matrix/event"
 	"maunium.net/go/mauview"
 
@@ -101,5 +100,3 @@ func (msg *TextMessage) Draw(screen mauview.Screen) {
 		line.Draw(screen, 0, y)
 	}
 }
-
-func (msg *TextMessage) RegisterMatrix(matrix ifc.MatrixContainer, prefs config.UserPreferences) {}
diff --git a/ui/room-view.go b/ui/room-view.go
index ef19c9d..29c455d 100644
--- a/ui/room-view.go
+++ b/ui/room-view.go
@@ -27,6 +27,7 @@ import (
 	"github.com/mattn/go-runewidth"
 
 	"maunium.net/go/gomuks/debug"
+	"maunium.net/go/gomuks/lib/open"
 	"maunium.net/go/gomuks/matrix/event"
 
 	"maunium.net/go/mauview"
@@ -191,6 +192,17 @@ func (view *RoomView) OnSelect(message *messages.UIMessage) {
 		go view.SendReaction(message.EventID, view.selectContent)
 	case SelectRedact:
 		go view.Redact(message.EventID, view.selectContent)
+	case SelectDownload, SelectOpen:
+		msg, ok := message.Renderer.(*messages.FileMessage)
+		if ok {
+			path := ""
+			if len(view.selectContent) > 0 {
+				path = view.selectContent
+			} else if view.selectReason == SelectDownload {
+				path = msg.Body
+			}
+			go view.Download(msg.URL, path, view.selectReason == SelectOpen)
+		}
 	}
 	view.selecting = false
 	view.selectContent = ""
@@ -465,9 +477,22 @@ func (view *RoomView) SetEditing(evt *event.Event) {
 	view.input.SetCursorOffset(-1)
 }
 
-func (view *RoomView) findMessage(current *event.Event, ownMessage, forward bool) *messages.UIMessage {
+type findFilter func(evt *event.Event) bool
+
+func (view *RoomView) filterOwnOnly(evt *event.Event) bool {
+	return evt.Sender == view.parent.matrix.Client().UserID && evt.Type == mautrix.EventMessage
+}
+
+func (view *RoomView) filterMediaOnly(evt *event.Event) bool {
+	return evt.Type == mautrix.EventMessage && (
+		evt.Content.MsgType == mautrix.MsgFile ||
+			evt.Content.MsgType == mautrix.MsgImage ||
+			evt.Content.MsgType == mautrix.MsgAudio ||
+			evt.Content.MsgType == mautrix.MsgVideo)
+}
+
+func (view *RoomView) findMessage(current *event.Event, forward bool, allow findFilter) *messages.UIMessage {
 	currentFound := current == nil
-	self := view.parent.matrix.Client().UserID
 	msgs := view.MessageView().messages
 	for i := 0; i < len(msgs); i++ {
 		index := i
@@ -478,7 +503,7 @@ func (view *RoomView) findMessage(current *event.Event, ownMessage, forward bool
 		if evt.EventID == "" || evt.EventID == evt.TxnID || evt.IsService {
 			continue
 		} else if currentFound {
-			if !ownMessage || (evt.SenderID == self && evt.Event.Type == mautrix.EventMessage) {
+			if allow == nil || allow(evt.Event) {
 				return evt
 			}
 		} else if evt.EventID == current.ID {
@@ -492,7 +517,7 @@ func (view *RoomView) EditNext() {
 	if view.editing == nil {
 		return
 	}
-	foundMsg := view.findMessage(view.editing, true, true)
+	foundMsg := view.findMessage(view.editing, true, view.filterOwnOnly)
 	view.SetEditing(foundMsg.GetEvent())
 }
 
@@ -500,7 +525,7 @@ func (view *RoomView) EditPrevious() {
 	if view.replying != nil {
 		return
 	}
-	foundMsg := view.findMessage(view.editing, true, false)
+	foundMsg := view.findMessage(view.editing, false, view.filterOwnOnly)
 	if foundMsg != nil {
 		view.SetEditing(foundMsg.GetEvent())
 	}
@@ -511,7 +536,11 @@ func (view *RoomView) SelectNext() {
 	if msgView.selected == nil {
 		return
 	}
-	foundMsg := view.findMessage(msgView.selected.GetEvent(), false, true)
+	var filter findFilter
+	if view.selectReason == SelectDownload || view.selectReason == SelectOpen {
+		filter = view.filterMediaOnly
+	}
+	foundMsg := view.findMessage(msgView.selected.GetEvent(), true, filter)
 	if foundMsg != nil {
 		msgView.SetSelected(foundMsg)
 		// TODO scroll selected message into view
@@ -520,7 +549,11 @@ func (view *RoomView) SelectNext() {
 
 func (view *RoomView) SelectPrevious() {
 	msgView := view.MessageView()
-	foundMsg := view.findMessage(msgView.selected.GetEvent(), false, false)
+	var filter findFilter
+	if view.selectReason == SelectDownload || view.selectReason == SelectOpen {
+		filter = view.filterMediaOnly
+	}
+	foundMsg := view.findMessage(msgView.selected.GetEvent(), false, filter)
 	if foundMsg != nil {
 		msgView.SetSelected(foundMsg)
 		// TODO scroll selected message into view
@@ -578,6 +611,20 @@ func (view *RoomView) InputSubmit(text string) {
 	view.SetInputText("")
 }
 
+func (view *RoomView) Download(url mautrix.ContentURI, filename string, openFile bool) {
+	path, err := view.parent.matrix.DownloadToDisk(url, filename)
+	if err != nil {
+		view.AddServiceMessage(fmt.Sprintf("Failed to download media: %v", err))
+		view.parent.parent.Render()
+		return
+	}
+	view.AddServiceMessage(fmt.Sprintf("File downloaded to %s", path))
+	view.parent.parent.Render()
+	if openFile {
+		open.Open(path)
+	}
+}
+
 func (view *RoomView) Redact(eventID, reason string) {
 	defer debug.Recover()
 	err := view.parent.matrix.Redact(view.Room.ID, eventID, reason)