Display message delivery error, color text using theme colors

fixes #672

libdino/src/entity/message.vala

@@ -16,9 +16,12 @@ public class Message : Object {
         UNSENT,
         WONTSEND,
         SENDING,
-        SENT
+        SENT,
+        ERROR
     }
 
+    public static Marked[] MARKED_RECEIVED = new Marked[] { Marked.READ, Marked.RECEIVED, Marked.ACKNOWLEDGED };
+
     public enum Type {
         ERROR,
         CHAT,

libdino/src/service/message_processor.vala

@@ -144,6 +144,19 @@ public class MessageProcessor : StreamInteractionModule, Object {
                 hitted_range[query_id] = -2;
             }
         });
+        stream_interactor.module_manager.get_module(account, Xmpp.MessageModule.IDENTITY).received_error.connect((stream, message_stanza, error_stanza) => {
+            Conversation? conversation = stream_interactor.get_module(ConversationManager.IDENTITY).get_conversation(message_stanza.from.bare_jid, account);
+            if (conversation == null) return;
+            Message? message = stream_interactor.get_module(MessageStorage.IDENTITY).get_message_by_stanza_id(message_stanza.id, conversation);
+            if (message == null) return;
+            // We don't care about delivery errors if our counterpart already ACKed the message.
+            if (message.marked in Message.MARKED_RECEIVED) return;
+
+            warning("Message delivery error from %s. Type: %s, Condition: %s, Text: %s", message_stanza.from.to_string(), error_stanza.type_ ?? "-", error_stanza.condition, error_stanza.text ?? "-");
+            if (error_stanza.condition == Xmpp.ErrorStanza.CONDITION_RECIPIENT_UNAVAILABLE && error_stanza.type_ == Xmpp.ErrorStanza.TYPE_CANCEL) return;
+
+            message.marked = Message.Marked.ERROR;
+        });
 
         convert_sending_to_unsent_msgs(account);
     }

main/data/theme.css

@@ -86,6 +86,14 @@ window.dino-main .dino-conversation .message-box.edit-mode:hover {
     background: alpha(@theme_selected_bg_color, 0.12);
 }
 
+window.dino-main .dino-conversation .message-box.error {
+    background: alpha(@error_color, 0.1);
+}
+
+window.dino-main .dino-conversation .message-box.error:hover {
+    background: alpha(@error_color, 0.12);
+}
+
 window.dino-main .file-box-outer,
 window.dino-main .call-box-outer {
     background: @theme_base_color;

main/src/ui/conversation_content_view/conversation_item_skeleton.vala

@@ -16,6 +16,7 @@ public class ConversationItemSkeleton : EventBox {
     public Conversation conversation { get; set; }
     public Plugins.MetaConversationItem item;
     public bool item_in_edit_mode { get; set; }
+    public Entities.Message.Marked item_mark { get; set; }
     public ContentMetaItem? content_meta_item = null;
     public Widget? widget = null;
 
@@ -34,6 +35,10 @@ public class ConversationItemSkeleton : EventBox {
         item.bind_property("in-edit-mode", this, "item-in-edit-mode");
         this.notify["item-in-edit-mode"].connect(update_edit_mode);
 
+        item.bind_property("mark", this, "item-mark", BindingFlags.SYNC_CREATE);
+        this.notify["item-mark"].connect(update_error_mode);
+        update_error_mode();
+
         widget = item.get_widget(Plugins.WidgetType.GTK) as Widget;
         if (widget != null) {
             widget.valign = Align.END;
@@ -96,6 +101,14 @@ public class ConversationItemSkeleton : EventBox {
             this.get_style_context().remove_class("edit-mode");
         }
     }
+
+    private void update_error_mode() {
+        if (item_mark == Message.Marked.ERROR) {
+            this.get_style_context().add_class("error");
+        } else {
+            this.get_style_context().remove_class("error");
+        }
+    }
 }
 
 [GtkTemplate (ui = "/im/dino/Dino/conversation_content_view/item_metadata_header.ui")]

main/src/ui/conversation_content_view/message_widget.vala

@@ -77,6 +77,12 @@ public class MessageItemWidget : SizeRequestBin {
     public signal void edit_cancelled();
     public signal void edit_sent(string text);
 
+    enum AdditionalInfo {
+        NONE,
+        PENDING,
+        DELIVERY_FAILED
+    }
+
     StreamInteractor stream_interactor;
     public ContentItem content_item;
     public Message.Marked marked { get; set; }
@@ -84,6 +90,7 @@ public class MessageItemWidget : SizeRequestBin {
     Label label = new Label("") { use_markup=true, xalign=0, selectable=true, wrap=true, wrap_mode=Pango.WrapMode.WORD_CHAR, vexpand=true, visible=true };
     MessageItemEditMode? edit_mode = null;
     ChatTextViewController? controller = null;
+    AdditionalInfo additional_info = AdditionalInfo.NONE;
 
     ulong realize_id = -1;
     ulong style_updated_id = -1;
@@ -99,6 +106,34 @@ public class MessageItemWidget : SizeRequestBin {
         this.stream_interactor = stream_interactor;
         this.content_item = content_item;
 
+        Message message = ((MessageItem) content_item).message;
+        if (message.direction == Message.DIRECTION_SENT && !(message.marked in Message.MARKED_RECEIVED)) {
+            var binding = message.bind_property("marked", this, "marked");
+            marked_notify_handler_id = this.notify["marked"].connect(() => {
+                // Currently "pending", but not anymore
+                if (additional_info == AdditionalInfo.PENDING &&
+                        message.marked != Message.Marked.SENDING && message.marked != Message.Marked.UNSENT) {
+                    update_label();
+                }
+
+                // Currently "error", but not anymore
+                if (additional_info == AdditionalInfo.DELIVERY_FAILED && message.marked != Message.Marked.ERROR) {
+                    update_label();
+                }
+
+                // Currently not error, but should be
+                if (additional_info != AdditionalInfo.DELIVERY_FAILED && message.marked == Message.Marked.ERROR) {
+                    update_label();
+                }
+
+                // Nothing bad can happen anymore
+                if (message.marked in Message.MARKED_RECEIVED) {
+                    binding.unbind();
+                    this.disconnect(marked_notify_handler_id);
+                }
+            });
+        }
+
         update_label();
     }
 
@@ -181,32 +216,34 @@ public class MessageItemWidget : SizeRequestBin {
             markup_text = @"<span size=\'$size_str\'>" + markup_text + "</span>";
         }
 
-        string gray_color = Util.is_dark_theme(label) ? "#808080" : "#909090";
+        string gray_color = Util.rgba_to_hex(Util.get_label_pango_class_color(label, "dim-label"));
 
         if (message.edit_to != null) {
-            markup_text += " <span size='small' color='%s'>(%s)</span>".printf(gray_color, _("edited"));
+            markup_text += "  <span size='small' color='%s'>(%s)</span>".printf(gray_color, _("edited"));
             theme_dependent = true;
         }
 
-        // Append "pending..." iff message has not been sent yet
+        // Append message status info
+        additional_info = AdditionalInfo.NONE;
         if (message.direction == Message.DIRECTION_SENT && (message.marked == Message.Marked.SENDING || message.marked == Message.Marked.UNSENT)) {
+            // Append "pending..." iff message has not been sent yet
             if (message.time.compare(new DateTime.now_utc().add_seconds(-10)) < 0) {
-                markup_text += " <span size='small' color='%s'>%s</span>".printf(gray_color, "pending…");
+                markup_text += "  <span size='small' color='%s'>%s</span>".printf(gray_color, _("pending…"));
-
+                theme_dependent = true;
-                // Update the label as soon as the sent state changes
+                additional_info = AdditionalInfo.PENDING;
-                var binding = message.bind_property("marked", this, "marked");
-                marked_notify_handler_id = this.notify["marked"].connect(() => {
-                    binding.unbind();
-                    this.disconnect(marked_notify_handler_id);
-                    update_label();
-                });
             } else {
                 int time_diff = (- (int) message.time.difference(new DateTime.now_utc()) / 1000);
                 Timeout.add(10000 - time_diff, () => {
-                   update_label();
+                    update_label();
                     return false;
                 });
             }
+        } else if (message.direction == Message.DIRECTION_SENT && message.marked == Message.Marked.ERROR) {
+            // Append "delivery failed" if there was a server error
+            string error_color = Util.rgba_to_hex(Util.get_label_pango_color(label, "@error_color"));
+            markup_text += "  <span size='small' color='%s'>%s</span>".printf(error_color, _("delivery failed"));
+            theme_dependent = true;
+            additional_info = AdditionalInfo.DELIVERY_FAILED;
         }
 
         if (theme_dependent && realize_id == -1) {

main/src/ui/util/helper.vala

@@ -154,10 +154,33 @@ public static void image_set_from_scaled_pixbuf(Image image, Gdk.Pixbuf pixbuf,
     image.set_from_surface(surface);
 }
 
+public static Gdk.RGBA get_label_pango_color(Label label, string css_color) {
+    Gtk.CssProvider provider = force_color(label, css_color);
+    Gdk.RGBA color_rgba = label.get_style_context().get_color(StateFlags.NORMAL);
+    label.get_style_context().remove_provider(provider);
+    return color_rgba;
+}
+
+public static Gdk.RGBA get_label_pango_class_color(Label label, string css_class) {
+    label.get_style_context().add_class(css_class);
+    Gdk.RGBA color_rgba = label.get_style_context().get_color(StateFlags.NORMAL);
+    label.get_style_context().remove_class(css_class);
+    return color_rgba;
+}
+
+public static string rgba_to_hex(Gdk.RGBA rgba) {
+    return "#%02x%02x%02x%02x".printf(
+            (uint)(Math.round(rgba.red*255)),
+            (uint)(Math.round(rgba.green*255)),
+            (uint)(Math.round(rgba.blue*255)),
+            (uint)(Math.round(rgba.alpha*255)))
+            .up();
+}
+
 private const string force_background_css = "%s { background-color: %s; }";
 private const string force_color_css = "%s { color: %s; }";
 
-public static void force_css(Gtk.Widget widget, string css) {
+public static Gtk.CssProvider force_css(Gtk.Widget widget, string css) {
     var p = new Gtk.CssProvider();
     try {
         p.load_from_data(css);
@@ -165,14 +188,15 @@ public static void force_css(Gtk.Widget widget, string css) {
     } catch (GLib.Error err) {
         // handle err
     }
+    return p;
 }
 
 public static void force_background(Gtk.Widget widget, string color, string selector = "*") {
     force_css(widget, force_background_css.printf(selector, color));
 }
 
-public static void force_color(Gtk.Widget widget, string color, string selector = "*") {
+public static Gtk.CssProvider force_color(Gtk.Widget widget, string color, string selector = "*") {
-    force_css(widget, force_color_css.printf(selector, color));
+    return force_css(widget, force_color_css.printf(selector, color));
 }
 
 public static void force_error_color(Gtk.Widget widget, string selector = "*") {

xmpp-vala/src/module/message/module.vala

@@ -12,6 +12,7 @@ namespace Xmpp {
         public StanzaListenerHolder<MessageStanza> send_pipeline = new StanzaListenerHolder<MessageStanza>();
 
         public signal void received_message(XmppStream stream, MessageStanza message);
+        public signal void received_error(XmppStream stream, MessageStanza message, ErrorStanza error);
         public signal void received_message_unprocessed(XmppStream stream, MessageStanza message);
 
         public async void send_message(XmppStream stream, MessageStanza message) throws IOStreamError {
@@ -24,7 +25,11 @@ namespace Xmpp {
 
             received_message_unprocessed(stream, message);
 
-            if (!message.is_error()) {
+            if (message.is_error()) {
+                ErrorStanza? error_stanza = message.get_error();
+                if (error_stanza == null) return;
+                received_error(stream, message, error_stanza);
+            } else {
                 bool abort = yield received_pipeline.run(stream, message);
                 if (abort) return;
 

xmpp-vala/src/module/stanza.vala

@@ -74,7 +74,7 @@ public class Stanza : Object {
     }
 
     public ErrorStanza? get_error() {
-        return new ErrorStanza.from_stanza(this.stanza);
+        return ErrorStanza.from_stanza(this.stanza);
     }
 }
 

xmpp-vala/src/module/stanza_error.vala

@@ -60,8 +60,11 @@ namespace Xmpp {
 
         public StanzaNode error_node;
 
-        public ErrorStanza.from_stanza(StanzaNode stanza) {
+        public static ErrorStanza? from_stanza(StanzaNode stanza) {
-            error_node = stanza.get_subnode("error");
+            var error_stanza = new ErrorStanza();
+            error_stanza.error_node = stanza.get_subnode("error");
+            if (error_stanza.error_node == null) return null;
+            return error_stanza;
         }
 
         public ErrorStanza.build(string type, string condition, string? human_readable, StanzaNode? application_condition) {