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// gomuks - A terminal Matrix client written in Go.
// Copyright (C) 2019 Tulir Asokan
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>.
package messages
import (
"bytes"
"fmt"
"image"
"image/color"
"maunium.net/go/gomuks/matrix/event"
"maunium.net/go/mauview"
"maunium.net/go/tcell"
"maunium.net/go/gomuks/config"
"maunium.net/go/gomuks/debug"
"maunium.net/go/gomuks/interface"
"maunium.net/go/gomuks/lib/ansimage"
"maunium.net/go/gomuks/ui/messages/tstring"
)
type ImageMessage struct {
Body string
Homeserver string
FileID string
data []byte
buffer []tstring.TString
matrix ifc.MatrixContainer
}
// NewImageMessage creates a new ImageMessage object with the provided values and the default state.
func NewImageMessage(matrix ifc.MatrixContainer, evt *event.Event, displayname string, body, homeserver, fileID string, data []byte) *UIMessage {
return newUIMessage(evt, displayname, &ImageMessage{
Body: body,
Homeserver: homeserver,
FileID: fileID,
data: data,
matrix: matrix,
})
}
func (msg *ImageMessage) Clone() MessageRenderer {
data := make([]byte, len(msg.data))
copy(data, msg.data)
return &ImageMessage{
Body: msg.Body,
Homeserver: msg.Homeserver,
FileID: msg.FileID,
data: data,
matrix: msg.matrix,
}
}
func (msg *ImageMessage) RegisterMatrix(matrix ifc.MatrixContainer) {
msg.matrix = matrix
if len(msg.data) == 0 {
go msg.updateData()
}
}
func (msg *ImageMessage) NotificationContent() string {
return "Sent an image"
}
func (msg *ImageMessage) PlainText() string {
return fmt.Sprintf("%s: %s", msg.Body, msg.matrix.GetDownloadURL(msg.Homeserver, msg.FileID))
}
func (msg *ImageMessage) String() string {
return fmt.Sprintf(`&messages.ImageMessage{Body="%s", Homeserver="%s", FileID="%s"}`, msg.Body, msg.Homeserver, msg.FileID)
}
func (msg *ImageMessage) updateData() {
defer debug.Recover()
debug.Print("Loading image:", msg.Homeserver, msg.FileID)
data, _, _, err := msg.matrix.Download(fmt.Sprintf("mxc://%s/%s", msg.Homeserver, msg.FileID))
if err != nil {
debug.Printf("Failed to download image %s/%s: %v", msg.Homeserver, msg.FileID, err)
return
}
debug.Print("Image", msg.Homeserver, msg.FileID, "loaded.")
msg.data = data
}
func (msg *ImageMessage) Path() string {
return msg.matrix.GetCachePath(msg.Homeserver, msg.FileID)
}
// CalculateBuffer generates the internal buffer for this message that consists
// of the text of this message split into lines at most as wide as the width
// parameter. If the message width is larger than the width of the buffer
// the message is scaled to one third the buffer width.
func (msg *ImageMessage) CalculateBuffer(prefs config.UserPreferences, width int, uiMsg *UIMessage) {
if width < 2 {
return
}
if prefs.BareMessageView || prefs.DisableImages {
msg.buffer = calculateBufferWithText(prefs, tstring.NewTString(msg.PlainText()), width, uiMsg)
return
}
img, _, err := image.DecodeConfig(bytes.NewReader(msg.data))
if err != nil {
debug.Print("Image could not be decoded:", err)
}
imgWidth := img.Width
if img.Width > width {
imgWidth = width / 3
}
ansImage, err := ansimage.NewScaledFromReader(bytes.NewReader(msg.data), 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)
return
}
msg.buffer = ansImage.Render()
}
func (msg *ImageMessage) Height() int {
return len(msg.buffer)
}
func (msg *ImageMessage) Draw(screen mauview.Screen) {
for y, line := range msg.buffer {
line.Draw(screen, 0, y)
}
}
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