Merge remote-tracking branch 'origin/feature/calls'

17 files changed, 1447 insertions, 35 deletions

diff --git a/main/src/ui/application.vala b/main/src/ui/application.vala
index 358097e3..780c37fd 100644
--- a/main/src/ui/application.vala
+++ b/main/src/ui/application.vala
@@ -199,6 +199,24 @@ public class Dino.Ui.Application : Gtk.Application, Dino.Application {
             dialog.present();
         });
         add_action(open_shortcuts_action);
+
+        SimpleAction accept_call_action = new SimpleAction("accept-call", VariantType.INT32);
+        accept_call_action.activate.connect((variant) => {
+            Call? call = stream_interactor.get_module(CallStore.IDENTITY).get_call_by_id(variant.get_int32());
+            stream_interactor.get_module(Calls.IDENTITY).accept_call(call);
+
+            var call_window = new CallWindow();
+            call_window.controller = new CallWindowController(call_window, call, stream_interactor);
+            call_window.present();
+        });
+        add_action(accept_call_action);
+
+        SimpleAction deny_call_action = new SimpleAction("deny-call", VariantType.INT32);
+        deny_call_action.activate.connect((variant) => {
+            Call? call = stream_interactor.get_module(CallStore.IDENTITY).get_call_by_id(variant.get_int32());
+            stream_interactor.get_module(Calls.IDENTITY).reject_call(call);
+        });
+        add_action(deny_call_action);
     }
 
     public bool use_csd() {
diff --git a/main/src/ui/call_window/audio_settings_popover.vala b/main/src/ui/call_window/audio_settings_popover.vala
new file mode 100644
index 00000000..7d1f39b0
--- /dev/null
+++ b/main/src/ui/call_window/audio_settings_popover.vala
@@ -0,0 +1,127 @@
+using Gee;
+using Gtk;
+using Dino.Entities;
+
+public class Dino.Ui.AudioSettingsPopover : Gtk.Popover {
+
+    public signal void microphone_selected(Plugins.MediaDevice device);
+    public signal void speaker_selected(Plugins.MediaDevice device);
+
+    public Plugins.MediaDevice? current_microphone_device { get; set; }
+    public Plugins.MediaDevice? current_speaker_device { get; set; }
+
+    private HashMap<ListBoxRow, Plugins.MediaDevice> row_microphone_device = new HashMap<ListBoxRow, Plugins.MediaDevice>();
+    private HashMap<ListBoxRow, Plugins.MediaDevice> row_speaker_device = new HashMap<ListBoxRow, Plugins.MediaDevice>();
+
+    public AudioSettingsPopover() {
+        Box box = new Box(Orientation.VERTICAL, 15) { margin=18, visible=true };
+        box.add(create_microphone_box());
+        box.add(create_speaker_box());
+
+        this.add(box);
+    }
+
+    private Widget create_microphone_box() {
+        Plugins.VideoCallPlugin call_plugin = Dino.Application.get_default().plugin_registry.video_call_plugin;
+        Gee.List<Plugins.MediaDevice> devices = call_plugin.get_devices("audio", false);
+
+        Box micro_box = new Box(Orientation.VERTICAL, 10) { visible=true };
+        micro_box.add(new Label("<b>" + _("Microphones") + "</b>") { use_markup=true, xalign=0, visible=true, can_focus=true /* grab initial focus*/ });
+
+        if (devices.size == 0) {
+            micro_box.add(new Label("No microphones found."));
+        } else {
+            ListBox micro_list_box = new ListBox() { activate_on_single_click=true, selection_mode=SelectionMode.SINGLE, visible=true };
+            micro_list_box.set_header_func(listbox_header_func);
+            Frame micro_frame = new Frame(null) { visible=true };
+            micro_frame.add(micro_list_box);
+            foreach (Plugins.MediaDevice device in devices) {
+                Label label = new Label(device.display_name) { xalign=0, visible=true };
+                Image image = new Image.from_icon_name("object-select-symbolic", IconSize.BUTTON) { visible=true };
+                if (current_microphone_device == null || current_microphone_device.id != device.id) {
+                    image.opacity = 0;
+                }
+                this.notify["current-microphone-device"].connect(() => {
+                    if (current_microphone_device == null || current_microphone_device.id != device.id) {
+                        image.opacity = 0;
+                    } else {
+                        image.opacity = 1;
+                    }
+                });
+                Box device_box = new Box(Orientation.HORIZONTAL, 0) { spacing=7, margin=7, visible=true };
+                device_box.add(image);
+                device_box.add(label);
+                ListBoxRow list_box_row = new ListBoxRow() { visible=true };
+                list_box_row.add(device_box);
+                micro_list_box.add(list_box_row);
+
+                row_microphone_device[list_box_row] = device;
+            }
+            micro_list_box.row_activated.connect((row) => {
+                if (!row_microphone_device.has_key(row)) return;
+                microphone_selected(row_microphone_device[row]);
+                micro_list_box.unselect_row(row);
+            });
+            micro_box.add(micro_frame);
+        }
+
+        return micro_box;
+    }
+
+    private Widget create_speaker_box() {
+        Plugins.VideoCallPlugin call_plugin = Dino.Application.get_default().plugin_registry.video_call_plugin;
+        Gee.List<Plugins.MediaDevice> devices = call_plugin.get_devices("audio", true);
+
+        Box speaker_box = new Box(Orientation.VERTICAL, 10) { visible=true };
+        speaker_box.add(new Label("<b>" + _("Speakers") +"</b>") { use_markup=true, xalign=0, visible=true });
+
+        if (devices.size == 0) {
+            speaker_box.add(new Label("No speakers found."));
+        } else {
+            ListBox speaker_list_box = new ListBox() { activate_on_single_click=true, selection_mode=SelectionMode.SINGLE, visible=true };
+            speaker_list_box.set_header_func(listbox_header_func);
+            speaker_list_box.row_selected.connect((row) => {
+
+            });
+            Frame speaker_frame = new Frame(null) { visible=true };
+            speaker_frame.add(speaker_list_box);
+            foreach (Plugins.MediaDevice device in devices) {
+                Label label = new Label(device.display_name) { xalign=0, visible=true };
+                Image image = new Image.from_icon_name("object-select-symbolic", IconSize.BUTTON) { visible=true };
+                if (current_speaker_device == null || current_speaker_device.id != device.id) {
+                    image.opacity = 0;
+                }
+                this.notify["current-speaker-device"].connect(() => {
+                    if (current_speaker_device == null || current_speaker_device.id != device.id) {
+                        image.opacity = 0;
+                    } else {
+                        image.opacity = 1;
+                    }
+                });
+                Box device_box = new Box(Orientation.HORIZONTAL, 0) { spacing=7, margin=7, visible=true };
+                device_box.add(image);
+                device_box.add(label);
+                ListBoxRow list_box_row = new ListBoxRow() { visible=true };
+                list_box_row.add(device_box);
+                speaker_list_box.add(list_box_row);
+
+                row_speaker_device[list_box_row] = device;
+            }
+            speaker_list_box.row_activated.connect((row) => {
+                if (!row_speaker_device.has_key(row)) return;
+                speaker_selected(row_speaker_device[row]);
+                speaker_list_box.unselect_row(row);
+            });
+            speaker_box.add(speaker_frame);
+        }
+
+        return speaker_box;
+    }
+
+    private void listbox_header_func(ListBoxRow row, ListBoxRow? before_row) {
+        if (row.get_header() == null && before_row != null) {
+            row.set_header(new Separator(Orientation.HORIZONTAL));
+        }
+    }
+
+}
\ No newline at end of file
diff --git a/main/src/ui/call_window/call_bottom_bar.vala b/main/src/ui/call_window/call_bottom_bar.vala
new file mode 100644
index 00000000..8a0604b3
--- /dev/null
+++ b/main/src/ui/call_window/call_bottom_bar.vala
@@ -0,0 +1,164 @@
+using Dino.Entities;
+using Gtk;
+using Pango;
+
+public class Dino.Ui.CallBottomBar : Gtk.Box {
+
+    public signal void hang_up();
+
+    public bool audio_enabled { get; set; }
+    public bool video_enabled { get; set; }
+
+    public static IconSize ICON_SIZE_MEDIADEVICE_BUTTON = Gtk.icon_size_register("im.dino.Dino.CALL_MEDIADEVICE_BUTTON", 10, 10);
+
+    public string counterpart_display_name { get; set; }
+
+    private Button audio_button = new Button() { height_request=45, width_request=45, halign=Align.START, valign=Align.START, visible=true };
+    private Overlay audio_button_overlay = new Overlay() { visible=true };
+    private Image audio_image = new Image() { visible=true };
+    private MenuButton audio_settings_button = new MenuButton() { halign=Align.END, valign=Align.END };
+    public AudioSettingsPopover? audio_settings_popover;
+
+    private Button video_button = new Button() { height_request=45, width_request=45, halign=Align.START, valign=Align.START, visible=true };
+    private Overlay video_button_overlay = new Overlay() { visible=true };
+    private Image video_image = new Image() { visible=true };
+    private MenuButton video_settings_button = new MenuButton() { halign=Align.END, valign=Align.END };
+    public VideoSettingsPopover? video_settings_popover;
+
+    public CallEntryptionButton encryption_button = new CallEntryptionButton() { relief=ReliefStyle.NONE, height_request=30, width_request=30, margin_start=20, margin_bottom=25, halign=Align.START, valign=Align.END };
+
+    private Label label = new Label("") { margin=20, halign=Align.CENTER, valign=Align.CENTER, wrap=true, wrap_mode=Pango.WrapMode.WORD_CHAR, hexpand=true, visible=true };
+    private Stack stack = new Stack() { visible=true };
+
+    public CallBottomBar() {
+        Object(orientation:Orientation.HORIZONTAL, spacing:0);
+
+        Overlay default_control = new Overlay() { visible=true };
+        default_control.add_overlay(encryption_button);
+
+        Box main_buttons = new Box(Orientation.HORIZONTAL, 20) { margin_start=40, margin_end=40, margin=20, halign=Align.CENTER, hexpand=true, visible=true };
+
+        audio_button.add(audio_image);
+        audio_button.get_style_context().add_class("call-button");
+        audio_button.clicked.connect(() => { audio_enabled = !audio_enabled; });
+        audio_button.margin_end = audio_button.margin_bottom = 5; // space for the small settings button
+        audio_button_overlay.add(audio_button);
+        audio_button_overlay.add_overlay(audio_settings_button);
+        audio_settings_button.set_image(new Image.from_icon_name("go-up-symbolic", ICON_SIZE_MEDIADEVICE_BUTTON) { visible=true });
+        audio_settings_button.get_style_context().add_class("call-mediadevice-settings-button");
+        audio_settings_button.use_popover = true;
+        main_buttons.add(audio_button_overlay);
+
+        video_button.add(video_image);
+        video_button.get_style_context().add_class("call-button");
+        video_button.clicked.connect(() => { video_enabled = !video_enabled; });
+        video_button.margin_end = video_button.margin_bottom = 5;
+        video_button_overlay.add(video_button);
+        video_button_overlay.add_overlay(video_settings_button);
+        video_settings_button.set_image(new Image.from_icon_name("go-up-symbolic", ICON_SIZE_MEDIADEVICE_BUTTON) { visible=true });
+        video_settings_button.get_style_context().add_class("call-mediadevice-settings-button");
+        video_settings_button.use_popover = true;
+        main_buttons.add(video_button_overlay);
+
+        Button button_hang = new Button.from_icon_name("dino-phone-hangup-symbolic", IconSize.LARGE_TOOLBAR) { height_request=45, width_request=45, halign=Align.START, valign=Align.START, visible=true };
+        button_hang.get_style_context().add_class("call-button");
+        button_hang.get_style_context().add_class("destructive-action");
+        button_hang.clicked.connect(() => hang_up());
+        main_buttons.add(button_hang);
+
+        default_control.add(main_buttons);
+
+        label.get_style_context().add_class("text-no-controls");
+
+        stack.add_named(default_control, "control-buttons");
+        stack.add_named(label, "label");
+        this.add(stack);
+
+        this.notify["audio-enabled"].connect(on_audio_enabled_changed);
+        this.notify["video-enabled"].connect(on_video_enabled_changed);
+
+        audio_enabled = true;
+        video_enabled = false;
+
+        on_audio_enabled_changed();
+        on_video_enabled_changed();
+
+        this.get_style_context().add_class("call-bottom-bar");
+    }
+
+    public AudioSettingsPopover? show_audio_device_choices(bool show) {
+        audio_settings_button.visible = show;
+        if (audio_settings_popover != null) audio_settings_popover.visible = false;
+        if (!show) return null;
+
+        audio_settings_popover = new AudioSettingsPopover();
+
+        audio_settings_button.popover = audio_settings_popover;
+
+        audio_settings_popover.set_relative_to(audio_settings_button);
+        audio_settings_popover.microphone_selected.connect(() => { audio_settings_button.active = false; });
+        audio_settings_popover.speaker_selected.connect(() => { audio_settings_button.active = false; });
+
+        return audio_settings_popover;
+    }
+
+    public void show_audio_device_error() {
+        audio_settings_button.set_image(new Image.from_icon_name("dialog-warning-symbolic", IconSize.BUTTON) { visible=true });
+        Util.force_error_color(audio_settings_button);
+    }
+
+    public VideoSettingsPopover? show_video_device_choices(bool show) {
+        video_settings_button.visible = show;
+        if (video_settings_popover != null) video_settings_popover.visible = false;
+        if (!show) return null;
+
+        video_settings_popover = new VideoSettingsPopover();
+
+
+        video_settings_button.popover = video_settings_popover;
+
+        video_settings_popover.set_relative_to(video_settings_button);
+        video_settings_popover.camera_selected.connect(() => { video_settings_button.active = false; });
+
+        return video_settings_popover;
+    }
+
+    public void show_video_device_error() {
+        video_settings_button.set_image(new Image.from_icon_name("dialog-warning-symbolic", IconSize.BUTTON) { visible=true });
+        Util.force_error_color(video_settings_button);
+    }
+
+    public void on_audio_enabled_changed() {
+        if (audio_enabled) {
+            audio_image.set_from_icon_name("dino-microphone-symbolic", IconSize.LARGE_TOOLBAR);
+            audio_button.get_style_context().add_class("white-button");
+            audio_button.get_style_context().remove_class("transparent-white-button");
+        } else {
+            audio_image.set_from_icon_name("dino-microphone-off-symbolic", IconSize.LARGE_TOOLBAR);
+            audio_button.get_style_context().remove_class("white-button");
+            audio_button.get_style_context().add_class("transparent-white-button");
+        }
+    }
+
+    public void on_video_enabled_changed() {
+        if (video_enabled) {
+            video_image.set_from_icon_name("dino-video-symbolic", IconSize.LARGE_TOOLBAR);
+            video_button.get_style_context().add_class("white-button");
+            video_button.get_style_context().remove_class("transparent-white-button");
+
+        } else {
+            video_image.set_from_icon_name("dino-video-off-symbolic", IconSize.LARGE_TOOLBAR);
+            video_button.get_style_context().remove_class("white-button");
+            video_button.get_style_context().add_class("transparent-white-button");
+        }
+    }
+
+    public void show_counterpart_ended(string text) {
+        stack.set_visible_child_name("label");
+        label.label = text;
+    }
+
+    public bool is_menu_active() {
+        return video_settings_button.active || audio_settings_button.active || encryption_button.active;
+    }
+}
\ No newline at end of file
diff --git a/main/src/ui/call_window/call_encryption_button.vala b/main/src/ui/call_window/call_encryption_button.vala
new file mode 100644
index 00000000..1d785d51
--- /dev/null
+++ b/main/src/ui/call_window/call_encryption_button.vala
@@ -0,0 +1,77 @@
+using Dino.Entities;
+using Gtk;
+using Pango;
+
+public class Dino.Ui.CallEntryptionButton : MenuButton {
+
+    private Image encryption_image = new Image.from_icon_name("changes-allow-symbolic", IconSize.BUTTON) { visible=true };
+
+    construct {
+        add(encryption_image);
+        get_style_context().add_class("encryption-box");
+        this.set_popover(popover);
+    }
+
+    public void set_icon(bool encrypted, string? icon_name) {
+        this.visible = true;
+
+        if (encrypted) {
+            encryption_image.set_from_icon_name(icon_name ?? "changes-prevent-symbolic", IconSize.BUTTON);
+            get_style_context().remove_class("unencrypted");
+        } else {
+            encryption_image.set_from_icon_name(icon_name ?? "changes-allow-symbolic", IconSize.BUTTON);
+            get_style_context().add_class("unencrypted");
+        }
+    }
+
+    public void set_info(string? title, bool show_keys, Xmpp.Xep.Jingle.ContentEncryption? audio_encryption, Xmpp.Xep.Jingle.ContentEncryption? video_encryption) {
+        Popover popover = new Popover(this);
+        this.set_popover(popover);
+
+        if (audio_encryption == null) {
+            popover.add(new Label("This call is unencrypted.") { margin=10, visible=true } );
+            return;
+        }
+        if (title != null && !show_keys) {
+            popover.add(new Label(title) { use_markup=true, margin=10, visible=true } );
+            return;
+        }
+
+        Box box = new Box(Orientation.VERTICAL, 10) { margin=10, visible=true };
+        box.add(new Label("<b>%s</b>".printf(title ?? "This call is end-to-end encrypted.")) { use_markup=true, xalign=0, visible=true });
+
+        if (video_encryption == null) {
+            box.add(create_media_encryption_grid(audio_encryption));
+        } else {
+            box.add(new Label("<b>Audio</b>") { use_markup=true, xalign=0, visible=true });
+            box.add(create_media_encryption_grid(audio_encryption));
+            box.add(new Label("<b>Video</b>") { use_markup=true, xalign=0, visible=true });
+            box.add(create_media_encryption_grid(video_encryption));
+        }
+        popover.add(box);
+    }
+
+    private Grid create_media_encryption_grid(Xmpp.Xep.Jingle.ContentEncryption? encryption) {
+        Grid ret = new Grid() { row_spacing=3, column_spacing=5, visible=true };
+        if (encryption.peer_key.length > 0) {
+            ret.attach(new Label("Peer call key") { xalign=0, visible=true }, 1, 2, 1, 1);
+            ret.attach(new Label("<span font_family='monospace'>" + format_fingerprint(encryption.peer_key) + "</span>") { use_markup=true, max_width_chars=25, ellipsize=EllipsizeMode.MIDDLE, xalign=0, hexpand=true, visible=true }, 2, 2, 1, 1);
+        }
+        if (encryption.our_key.length > 0) {
+            ret.attach(new Label("Your call key") { xalign=0, visible=true }, 1, 3, 1, 1);
+            ret.attach(new Label("<span font_family='monospace'>" + format_fingerprint(encryption.our_key) + "</span>") { use_markup=true, max_width_chars=25, ellipsize=EllipsizeMode.MIDDLE, xalign=0, hexpand=true, visible=true }, 2, 3, 1, 1);
+        }
+        return ret;
+    }
+
+    private string format_fingerprint(uint8[] fingerprint) {
+        var sb = new StringBuilder();
+        for (int i = 0; i < fingerprint.length; i++) {
+            sb.append("%02x".printf(fingerprint[i]));
+            if (i < fingerprint.length - 1) {
+                sb.append(":");
+            }
+        }
+        return sb.str;
+    }
+}
\ No newline at end of file
diff --git a/main/src/ui/call_window/call_window.vala b/main/src/ui/call_window/call_window.vala
new file mode 100644
index 00000000..3b3d4dc2
--- /dev/null
+++ b/main/src/ui/call_window/call_window.vala
@@ -0,0 +1,260 @@
+using Dino.Entities;
+using Gtk;
+
+namespace Dino.Ui {
+
+    public class CallWindow : Gtk.Window {
+        public string counterpart_display_name { get; set; }
+
+        // TODO should find another place for this
+        public CallWindowController controller;
+
+        public Overlay overlay = new Overlay() { visible=true };
+        public EventBox event_box = new EventBox() { visible=true };
+        public CallBottomBar bottom_bar = new CallBottomBar() { visible=true };
+        public Revealer bottom_bar_revealer = new Revealer() { valign=Align.END, transition_type=RevealerTransitionType.CROSSFADE, transition_duration=200, visible=true };
+        public HeaderBar header_bar = new HeaderBar() { show_close_button=true, visible=true };
+        public Revealer header_bar_revealer = new Revealer() { valign=Align.START, transition_type=RevealerTransitionType.CROSSFADE, transition_duration=200, visible=true };
+        public Stack stack = new Stack() { visible=true };
+        public Box own_video_box = new Box(Orientation.HORIZONTAL, 0) { expand=true, visible=true };
+        private Widget? own_video = null;
+        private Box? own_video_border = new Box(Orientation.HORIZONTAL, 0) { expand=true }; // hack to draw a border around our own video, since we apparently can't draw a border around the Gst widget
+
+        private int own_video_width = 150;
+        private int own_video_height = 100;
+
+        private bool hide_controll_elements = false;
+        private uint hide_controll_handler = 0;
+        private Widget? main_widget = null;
+
+        construct {
+            header_bar.get_style_context().add_class("call-header-bar");
+            header_bar_revealer.add(header_bar);
+
+            this.get_style_context().add_class("dino-call-window");
+
+            bottom_bar_revealer.add(bottom_bar);
+
+            overlay.add_overlay(own_video_box);
+            overlay.add_overlay(own_video_border);
+            overlay.add_overlay(bottom_bar_revealer);
+            overlay.add_overlay(header_bar_revealer);
+
+            event_box.add(overlay);
+            add(event_box);
+
+            Util.force_css(own_video_border, "* { border: 1px solid #616161; background-color: transparent; }");
+        }
+
+        public CallWindow() {
+            event_box.events |= Gdk.EventMask.POINTER_MOTION_MASK;
+            event_box.events |= Gdk.EventMask.ENTER_NOTIFY_MASK;
+            event_box.events |= Gdk.EventMask.LEAVE_NOTIFY_MASK;
+
+            this.bind_property("counterpart-display-name", header_bar, "title", BindingFlags.SYNC_CREATE);
+            this.bind_property("counterpart-display-name", bottom_bar, "counterpart-display-name", BindingFlags.SYNC_CREATE);
+
+            event_box.motion_notify_event.connect(reveal_control_elements);
+            event_box.enter_notify_event.connect(reveal_control_elements);
+            event_box.leave_notify_event.connect(reveal_control_elements);
+            this.configure_event.connect(reveal_control_elements); // upon resizing
+            this.configure_event.connect(update_own_video_position);
+
+            this.set_titlebar(new OutsideHeaderBar(this.header_bar) { visible=true });
+
+            reveal_control_elements();
+        }
+
+        public void set_video_fallback(StreamInteractor stream_interactor, Conversation conversation) {
+            hide_controll_elements = false;
+
+            Box box = new Box(Orientation.HORIZONTAL, 0) { visible=true };
+            box.get_style_context().add_class("video-placeholder-box");
+            AvatarImage avatar = new AvatarImage() { hexpand=true, vexpand=true, halign=Align.CENTER, valign=Align.CENTER, height=100, width=100, visible=true };
+            avatar.set_conversation(stream_interactor, conversation);
+            box.add(avatar);
+
+            set_new_main_widget(box);
+        }
+
+        public void set_video(Widget widget) {
+            hide_controll_elements = true;
+
+            widget.visible = true;
+            set_new_main_widget(widget);
+        }
+
+        public void set_own_video(Widget? widget_) {
+            own_video_box.foreach((widget) => { own_video_box.remove(widget); });
+
+            own_video = widget_;
+            if (own_video == null) {
+                own_video = new Box(Orientation.HORIZONTAL, 0) { expand=true };
+            }
+            own_video.visible = true;
+            own_video.width_request = 150;
+            own_video.height_request = 100;
+            own_video_box.add(own_video);
+
+            own_video_border.visible = true;
+
+            update_own_video_position();
+        }
+
+        public void set_own_video_ratio(int width, int height) {
+            if (width / height > 150 / 100) {
+                this.own_video_width = 150;
+                this.own_video_height = height * 150 / width;
+            } else {
+                this.own_video_width = width * 100 / height;
+                this.own_video_height = 100;
+            }
+
+            own_video.width_request = own_video_width;
+            own_video.height_request = own_video_height;
+
+            update_own_video_position();
+        }
+
+        public void unset_own_video() {
+            own_video_box.foreach((widget) => { own_video_box.remove(widget); });
+
+            own_video_border.visible = false;
+        }
+
+        public void set_test_video() {
+            hide_controll_elements = true;
+
+            var pipeline = new Gst.Pipeline(null);
+            var src = Gst.ElementFactory.make("videotestsrc", null);
+            pipeline.add(src);
+            Gst.Video.Sink sink = (Gst.Video.Sink) Gst.ElementFactory.make("gtksink", null);
+            Gtk.Widget widget;
+            sink.get("widget", out widget);
+            widget.unparent();
+            pipeline.add(sink);
+            src.link(sink);
+            widget.visible = true;
+
+            pipeline.set_state(Gst.State.PLAYING);
+
+            sink.get_static_pad("sink").notify["caps"].connect(() => {
+                int width, height;
+                sink.get_static_pad("sink").caps.get_structure(0).get_int("width", out width);
+                sink.get_static_pad("sink").caps.get_structure(0).get_int("height", out height);
+                widget.width_request = width;
+                widget.height_request = height;
+            });
+
+            set_new_main_widget(widget);
+        }
+
+        private void set_new_main_widget(Widget widget) {
+            if (main_widget != null) overlay.remove(main_widget);
+            overlay.add(widget);
+            main_widget = widget;
+        }
+
+        public void set_status(string state) {
+            switch (state) {
+                case "requested":
+                    header_bar.subtitle = _("Calling…");
+                    break;
+                case "ringing":
+                    header_bar.subtitle = _("Ringing…");
+                    break;
+                case "establishing":
+                    header_bar.subtitle = _("Connecting…");
+                    break;
+                default:
+                    header_bar.subtitle = null;
+                    break;
+            }
+        }
+
+        public void show_counterpart_ended(string? reason_name, string? reason_text) {
+            hide_controll_elements = false;
+            reveal_control_elements();
+
+            string text = "";
+            if (reason_name == Xmpp.Xep.Jingle.ReasonElement.SUCCESS) {
+                text = _("%s ended the call").printf(counterpart_display_name);
+            } else if (reason_name == Xmpp.Xep.Jingle.ReasonElement.DECLINE || reason_name == Xmpp.Xep.Jingle.ReasonElement.BUSY) {
+                text = _("%s declined the call").printf(counterpart_display_name);
+            } else {
+                text = "The call has been terminated: " + (reason_name ?? "") + " " + (reason_text ?? "");
+            }
+
+            bottom_bar.show_counterpart_ended(text);
+        }
+
+        public bool reveal_control_elements() {
+            if (!bottom_bar_revealer.child_revealed) {
+                bottom_bar_revealer.set_reveal_child(true);
+                header_bar_revealer.set_reveal_child(true);
+            }
+
+            if (hide_controll_handler != 0) {
+                Source.remove(hide_controll_handler);
+                hide_controll_handler = 0;
+            }
+
+            if (!hide_controll_elements) {
+                return false;
+            }
+
+            hide_controll_handler = Timeout.add_seconds(3, () => {
+                if (!hide_controll_elements) {
+                    return false;
+                }
+
+                if (bottom_bar.is_menu_active()) {
+                    return true;
+                }
+
+                header_bar_revealer.set_reveal_child(false);
+                bottom_bar_revealer.set_reveal_child(false);
+                hide_controll_handler = 0;
+                return false;
+            });
+            return false;
+        }
+
+        private bool update_own_video_position() {
+            if (own_video == null) return false;
+
+            int width, height;
+            this.get_size(out width,out height);
+
+            own_video.margin_end = own_video.margin_bottom = own_video_border.margin_end = own_video_border.margin_bottom = 20;
+            own_video.margin_start = own_video_border.margin_start = width - own_video_width - 20;
+            own_video.margin_top = own_video_border.margin_top = height - own_video_height - 20;
+
+            return false;
+        }
+    }
+
+    /* Hack to make the CallHeaderBar feel like a HeaderBar (right click menu, double click, ..) although it isn't set as headerbar.
+     * OutsideHeaderBar is set as a headerbar and it doesn't take any space, but claims to take space (which is actually taken by CallHeaderBar).
+     */
+    public class OutsideHeaderBar : Gtk.Box {
+        HeaderBar header_bar;
+
+        public OutsideHeaderBar(HeaderBar header_bar) {
+            this.header_bar = header_bar;
+
+            size_allocate.connect_after(on_header_bar_size_allocate);
+            header_bar.size_allocate.connect(on_header_bar_size_allocate);
+        }
+
+        public void on_header_bar_size_allocate() {
+            Allocation header_bar_alloc;
+            header_bar.get_allocation(out header_bar_alloc);
+
+            Allocation alloc;
+            get_allocation(out alloc);
+            alloc.height = header_bar_alloc.height;
+            set_allocation(alloc);
+        }
+    }
+}
\ No newline at end of file
diff --git a/main/src/ui/call_window/call_window_controller.vala b/main/src/ui/call_window/call_window_controller.vala
new file mode 100644
index 00000000..b07b41b1
--- /dev/null
+++ b/main/src/ui/call_window/call_window_controller.vala
@@ -0,0 +1,254 @@
+using Dino.Entities;
+using Gtk;
+
+public class Dino.Ui.CallWindowController : Object {
+
+    private CallWindow call_window;
+    private Call call;
+    private Conversation conversation;
+    private StreamInteractor stream_interactor;
+    private Calls calls;
+    private Plugins.VideoCallPlugin call_plugin = Dino.Application.get_default().plugin_registry.video_call_plugin;
+
+    private Plugins.VideoCallWidget? own_video = null;
+    private Plugins.VideoCallWidget? counterpart_video = null;
+    private int window_height = -1;
+    private int window_width = -1;
+    private bool window_size_changed = false;
+
+    public CallWindowController(CallWindow call_window, Call call, StreamInteractor stream_interactor) {
+        this.call_window = call_window;
+        this.call = call;
+        this.stream_interactor = stream_interactor;
+
+        this.calls = stream_interactor.get_module(Calls.IDENTITY);
+        this.conversation = stream_interactor.get_module(ConversationManager.IDENTITY).get_conversation(call.counterpart.bare_jid, call.account, Conversation.Type.CHAT);
+        this.own_video = call_plugin.create_widget(Plugins.WidgetType.GTK);
+        this.counterpart_video = call_plugin.create_widget(Plugins.WidgetType.GTK);
+
+        call_window.counterpart_display_name = Util.get_conversation_display_name(stream_interactor, conversation);
+        call_window.set_default_size(704, 528); // 640x480 * 1.1
+        call_window.set_video_fallback(stream_interactor, conversation);
+
+        this.call_window.bottom_bar.video_enabled = calls.should_we_send_video(call);
+
+        if (call.direction == Call.DIRECTION_INCOMING) {
+            call_window.set_status("establishing");
+        } else {
+            call_window.set_status("requested");
+        }
+
+        call_window.bottom_bar.hang_up.connect(() => {
+            calls.end_call(conversation, call);
+            call_window.close();
+            call_window.destroy();
+            this.dispose();
+        });
+        call_window.destroy.connect(() => {
+            calls.end_call(conversation, call);
+            this.dispose();
+        });
+
+        call_window.bottom_bar.notify["audio-enabled"].connect(() => {
+            calls.mute_own_audio(call, !call_window.bottom_bar.audio_enabled);
+        });
+        call_window.bottom_bar.notify["video-enabled"].connect(() => {
+            calls.mute_own_video(call, !call_window.bottom_bar.video_enabled);
+            update_own_video();
+        });
+
+        calls.counterpart_sends_video_updated.connect((call, mute) => {
+            if (!this.call.equals(call)) return;
+
+            if (mute) {
+                call_window.set_video_fallback(stream_interactor, conversation);
+                counterpart_video.detach();
+            } else {
+                if (!(counterpart_video is Widget)) return;
+                Widget widget = (Widget) counterpart_video;
+                call_window.set_video(widget);
+                counterpart_video.display_stream(calls.get_video_stream(call));
+            }
+        });
+        calls.info_received.connect((call, session_info) => {
+            if (!this.call.equals(call)) return;
+            if (session_info == Xmpp.Xep.JingleRtp.CallSessionInfo.RINGING) {
+                call_window.set_status("ringing");
+            }
+        });
+        calls.encryption_updated.connect((call, audio_encryption, video_encryption, same) => {
+            if (!this.call.equals(call)) return;
+
+            string? title = null;
+            string? icon_name = null;
+            bool show_keys = true;
+            Plugins.Registry registry = Dino.Application.get_default().plugin_registry;
+            Plugins.CallEncryptionEntry? encryption_entry = audio_encryption != null ? registry.call_encryption_entries[audio_encryption.encryption_ns] : null;
+            if (encryption_entry != null) {
+                Plugins.CallEncryptionWidget? encryption_widgets = encryption_entry.get_widget(call.account, audio_encryption);
+                if (encryption_widgets != null) {
+                    title = encryption_widgets.get_title();
+                    icon_name = encryption_widgets.get_icon_name();
+                    show_keys = encryption_widgets.show_keys();
+                }
+            }
+            call_window.bottom_bar.encryption_button.set_info(title, show_keys, audio_encryption, same ? null :video_encryption);
+            call_window.bottom_bar.encryption_button.set_icon(audio_encryption != null, icon_name);
+        });
+
+        own_video.resolution_changed.connect((width, height) => {
+            if (width == 0 || height == 0) return;
+            call_window.set_own_video_ratio((int)width, (int)height);
+        });
+        counterpart_video.resolution_changed.connect((width, height) => {
+            if (window_size_changed) return;
+            if (width == 0 || height == 0) return;
+            if (width > height) {
+                call_window.resize(704, (int) (height * 704 / width));
+            } else {
+                call_window.resize((int) (width * 704 / height), 704);
+            }
+            capture_window_size();
+        });
+        call_window.configure_event.connect((event) => {
+            if (window_width == -1 || window_height == -1) return false;
+            int current_height = this.call_window.get_allocated_height();
+            int current_width = this.call_window.get_allocated_width();
+            if (window_width != current_width || window_height != current_height) {
+                debug("Call window size changed by user. Disabling auto window-to-video size adaptation. %i->%i x %i->%i", window_width, current_width, window_height, current_height);
+                window_size_changed = true;
+            }
+            return false;
+        });
+        call_window.realize.connect(() => {
+            capture_window_size();
+        });
+
+        call.notify["state"].connect(on_call_state_changed);
+        calls.call_terminated.connect(on_call_terminated);
+
+        update_own_video();
+    }
+
+    private void capture_window_size() {
+        Allocation allocation;
+        this.call_window.get_allocation(out allocation);
+        this.window_height = this.call_window.get_allocated_height();
+        this.window_width = this.call_window.get_allocated_width();
+    }
+
+    private void on_call_state_changed() {
+        if (call.state == Call.State.IN_PROGRESS) {
+            call_window.set_status("");
+            call_plugin.devices_changed.connect((media, incoming) => {
+                if (media == "audio") update_audio_device_choices();
+                if (media == "video") update_video_device_choices();
+            });
+
+            update_audio_device_choices();
+            update_video_device_choices();
+        }
+    }
+
+    private void on_call_terminated(Call call, string? reason_name, string? reason_text) {
+        call_window.show_counterpart_ended(reason_name, reason_text);
+        Timeout.add_seconds(3, () => {
+            call.notify["state"].disconnect(on_call_state_changed);
+            calls.call_terminated.disconnect(on_call_terminated);
+
+
+            call_window.close();
+            call_window.destroy();
+
+            return false;
+        });
+    }
+
+    private void update_audio_device_choices() {
+        if (call_plugin.get_devices("audio", true).size == 0 || call_plugin.get_devices("audio", false).size == 0) {
+            call_window.bottom_bar.show_audio_device_error();
+        } /*else if (call_plugin.get_devices("audio", true).size == 1 && call_plugin.get_devices("audio", false).size == 1) {
+            call_window.bottom_bar.show_audio_device_choices(false);
+            return;
+        }
+
+        AudioSettingsPopover? audio_settings_popover = call_window.bottom_bar.show_audio_device_choices(true);
+        update_current_audio_device(audio_settings_popover);
+
+        audio_settings_popover.microphone_selected.connect((device) => {
+            call_plugin.set_device(calls.get_audio_stream(call), device);
+            update_current_audio_device(audio_settings_popover);
+        });
+        audio_settings_popover.speaker_selected.connect((device) => {
+            call_plugin.set_device(calls.get_audio_stream(call), device);
+            update_current_audio_device(audio_settings_popover);
+        });
+        calls.stream_created.connect((call, media) => {
+            if (media == "audio") {
+                update_current_audio_device(audio_settings_popover);
+            }
+        });*/
+    }
+
+    private void update_current_audio_device(AudioSettingsPopover audio_settings_popover) {
+        Xmpp.Xep.JingleRtp.Stream stream = calls.get_audio_stream(call);
+        if (stream != null) {
+            audio_settings_popover.current_microphone_device = call_plugin.get_device(stream, false);
+            audio_settings_popover.current_speaker_device = call_plugin.get_device(stream, true);
+        }
+    }
+
+    private void update_video_device_choices() {
+        int device_count = call_plugin.get_devices("video", false).size;
+
+        if (device_count == 0) {
+            call_window.bottom_bar.show_video_device_error();
+        } /*else if (device_count == 1 || calls.get_video_stream(call) == null) {
+            call_window.bottom_bar.show_video_device_choices(false);
+            return;
+        }
+
+        VideoSettingsPopover? video_settings_popover = call_window.bottom_bar.show_video_device_choices(true);
+        update_current_video_device(video_settings_popover);
+
+        video_settings_popover.camera_selected.connect((device) => {
+            call_plugin.set_device(calls.get_video_stream(call), device);
+            update_current_video_device(video_settings_popover);
+            own_video.display_device(device);
+        });
+        calls.stream_created.connect((call, media) => {
+            if (media == "video") {
+                update_current_video_device(video_settings_popover);
+            }
+        });*/
+    }
+
+    private void update_current_video_device(VideoSettingsPopover video_settings_popover) {
+        Xmpp.Xep.JingleRtp.Stream stream = calls.get_video_stream(call);
+        if (stream != null) {
+            video_settings_popover.current_device = call_plugin.get_device(stream, false);
+        }
+    }
+
+    private void update_own_video() {
+        if (this.call_window.bottom_bar.video_enabled) {
+            Gee.List<Plugins.MediaDevice> devices = call_plugin.get_devices("video", false);
+            if (!(own_video is Widget) || devices.is_empty) {
+                call_window.set_own_video(null);
+            } else {
+                Widget widget = (Widget) own_video;
+                call_window.set_own_video(widget);
+                own_video.display_device(devices.first());
+            }
+        } else {
+            own_video.detach();
+            call_window.unset_own_video();
+        }
+    }
+
+    public override void dispose() {
+        base.dispose();
+        call.notify["state"].disconnect(on_call_state_changed);
+        calls.call_terminated.disconnect(on_call_terminated);
+    }
+}
\ No newline at end of file
diff --git a/main/src/ui/call_window/video_settings_popover.vala b/main/src/ui/call_window/video_settings_popover.vala
new file mode 100644
index 00000000..396c697c
--- /dev/null
+++ b/main/src/ui/call_window/video_settings_popover.vala
@@ -0,0 +1,73 @@
+using Gee;
+using Gtk;
+using Dino.Entities;
+
+public class Dino.Ui.VideoSettingsPopover : Gtk.Popover {
+
+    public signal void camera_selected(Plugins.MediaDevice device);
+
+    public Plugins.MediaDevice? current_device { get; set; }
+
+    private HashMap<ListBoxRow, Plugins.MediaDevice> row_device = new HashMap<ListBoxRow, Plugins.MediaDevice>();
+
+    public VideoSettingsPopover() {
+        Box box = new Box(Orientation.VERTICAL, 15) { margin=18, visible=true };
+        box.add(create_camera_box());
+
+        this.add(box);
+    }
+
+    private Widget create_camera_box() {
+        Plugins.VideoCallPlugin call_plugin = Dino.Application.get_default().plugin_registry.video_call_plugin;
+        Gee.List<Plugins.MediaDevice> devices = call_plugin.get_devices("video", false);
+
+        Box camera_box = new Box(Orientation.VERTICAL, 10) { visible=true };
+        camera_box.add(new Label("<b>" + _("Cameras") + "</b>") { use_markup=true, xalign=0, visible=true, can_focus=true /* grab initial focus*/ });
+
+        if (devices.size == 0) {
+            camera_box.add(new Label("No cameras found.") { visible=true });
+        } else {
+            ListBox list_box = new ListBox() { activate_on_single_click=true, selection_mode=SelectionMode.SINGLE, visible=true };
+            list_box.set_header_func(listbox_header_func);
+            Frame frame = new Frame(null) { visible=true };
+            frame.add(list_box);
+            foreach (Plugins.MediaDevice device in devices) {
+                Label label = new Label(device.display_name) { xalign=0, visible=true };
+                Image image = new Image.from_icon_name("object-select-symbolic", IconSize.BUTTON) { visible=true };
+                if (current_device == null || current_device.id != device.id) {
+                    image.opacity = 0;
+                }
+                this.notify["current-device"].connect(() => {
+                    if (current_device == null || current_device.id != device.id) {
+                        image.opacity = 0;
+                    } else {
+                        image.opacity = 1;
+                    }
+                });
+                Box device_box = new Box(Orientation.HORIZONTAL, 0) { spacing=7, margin=7, visible=true };
+                device_box.add(image);
+                device_box.add(label);
+                ListBoxRow list_box_row = new ListBoxRow() { visible=true };
+                list_box_row.add(device_box);
+                list_box.add(list_box_row);
+
+                row_device[list_box_row] = device;
+            }
+            list_box.row_activated.connect((row) => {
+                if (!row_device.has_key(row)) return;
+                camera_selected(row_device[row]);
+                list_box.unselect_row(row);
+            });
+            camera_box.add(frame);
+        }
+
+        return camera_box;
+    }
+
+    private void listbox_header_func(ListBoxRow row, ListBoxRow? before_row) {
+        if (row.get_header() == null && before_row != null) {
+            row.set_header(new Separator(Orientation.HORIZONTAL));
+        }
+    }
+
+}
\ No newline at end of file
diff --git a/main/src/ui/conversation_content_view/call_widget.vala b/main/src/ui/conversation_content_view/call_widget.vala
new file mode 100644
index 00000000..74525d11
--- /dev/null
+++ b/main/src/ui/conversation_content_view/call_widget.vala
@@ -0,0 +1,215 @@
+using Gee;
+using Gdk;
+using Gtk;
+using Pango;
+
+using Dino.Entities;
+
+namespace Dino.Ui {
+
+    public class CallMetaItem : ConversationSummary.ContentMetaItem {
+
+        private StreamInteractor stream_interactor;
+
+        public CallMetaItem(ContentItem content_item, StreamInteractor stream_interactor) {
+            base(content_item);
+            this.stream_interactor = stream_interactor;
+        }
+
+        public override Object? get_widget(Plugins.WidgetType type) {
+            CallItem call_item = content_item as CallItem;
+            return new CallWidget(stream_interactor, call_item.call, call_item.conversation) { visible=true };
+        }
+
+        public override Gee.List<Plugins.MessageAction>? get_item_actions(Plugins.WidgetType type) { return null; }
+    }
+
+    [GtkTemplate (ui = "/im/dino/Dino/call_widget.ui")]
+    public class CallWidget : SizeRequestBox {
+
+        [GtkChild] public Image image;
+        [GtkChild] public Label title_label;
+        [GtkChild] public Label subtitle_label;
+        [GtkChild] public Revealer incoming_call_revealer;
+        [GtkChild] public Button accept_call_button;
+        [GtkChild] public Button reject_call_button;
+
+        private StreamInteractor stream_interactor;
+        private Call call;
+        private Conversation conversation;
+        public Call.State call_state { get; set; } // needs to be public for binding
+        private uint time_update_handler_id = 0;
+
+        construct {
+            margin_top = 4;
+            size_request_mode = SizeRequestMode.HEIGHT_FOR_WIDTH;
+        }
+
+        public CallWidget(StreamInteractor stream_interactor, Call call, Conversation conversation) {
+            this.stream_interactor = stream_interactor;
+            this.call = call;
+            this.conversation = conversation;
+
+            size_allocate.connect((allocation) => {
+                if (allocation.height > parent.get_allocated_height()) {
+                    Idle.add(() => { parent.queue_resize(); return false; });
+                }
+            });
+
+            call.bind_property("state", this, "call-state");
+            this.notify["call-state"].connect(update_widget);
+
+            accept_call_button.clicked.connect(() => {
+                stream_interactor.get_module(Calls.IDENTITY).accept_call(call);
+
+                var call_window = new CallWindow();
+                call_window.controller = new CallWindowController(call_window, call, stream_interactor);
+                call_window.present();
+            });
+
+            reject_call_button.clicked.connect(() => {
+                stream_interactor.get_module(Calls.IDENTITY).reject_call(call);
+            });
+
+            update_widget();
+        }
+
+        private void update_widget() {
+            incoming_call_revealer.reveal_child = false;
+            incoming_call_revealer.get_style_context().remove_class("incoming");
+
+            switch (call.state) {
+                case Call.State.RINGING:
+                    image.set_from_icon_name("dino-phone-ring-symbolic", IconSize.LARGE_TOOLBAR);
+                    if (call.direction == Call.DIRECTION_INCOMING) {
+                        bool video = stream_interactor.get_module(Calls.IDENTITY).should_we_send_video(call);
+                        title_label.label = video ? _("Video call incoming") : _("Call incoming");
+                        subtitle_label.label = "Ring ring…!";
+                        incoming_call_revealer.reveal_child = true;
+                        incoming_call_revealer.get_style_context().add_class("incoming");
+                    } else {
+                        title_label.label = _("Establishing call");
+                        subtitle_label.label = "Ring ring…?";
+                    }
+                    break;
+                case Call.State.ESTABLISHING:
+                    image.set_from_icon_name("dino-phone-ring-symbolic", IconSize.LARGE_TOOLBAR);
+                    if (call.direction == Call.DIRECTION_INCOMING) {
+                        bool video = stream_interactor.get_module(Calls.IDENTITY).should_we_send_video(call);
+                        title_label.label = video ? _("Video call establishing") : _("Call establishing");
+                        subtitle_label.label = "Connecting…";
+                    }
+                    break;
+                case Call.State.IN_PROGRESS:
+                    image.set_from_icon_name("dino-phone-in-talk-symbolic", IconSize.LARGE_TOOLBAR);
+                    title_label.label = _("Call in progress…");
+                    string duration = get_duration_string((new DateTime.now_utc()).difference(call.local_time));
+                    subtitle_label.label = _("Started %s ago").printf(duration);
+
+                    time_update_handler_id = Timeout.add_seconds(get_next_time_change() + 1, () => {
+                        Source.remove(time_update_handler_id);
+                        time_update_handler_id = 0;
+                        update_widget();
+                        return true;
+                    });
+
+                    break;
+                case Call.State.OTHER_DEVICE_ACCEPTED:
+                    image.set_from_icon_name("dino-phone-hangup-symbolic", IconSize.LARGE_TOOLBAR);
+                    title_label.label = call.direction == Call.DIRECTION_INCOMING ? _("Incoming call") : _("Outgoing call");
+                    subtitle_label.label = _("You handled this call on another device");
+
+                    break;
+                case Call.State.ENDED:
+                    image.set_from_icon_name("dino-phone-hangup-symbolic", IconSize.LARGE_TOOLBAR);
+                    title_label.label = _("Call ended");
+                    string formated_end = Util.format_time(call.end_time, _("%H∶%M"), _("%l∶%M %p"));
+                    string duration = get_duration_string(call.end_time.difference(call.local_time));
+                    subtitle_label.label = _("Ended at %s").printf(formated_end) +
+                            " · " +
+                            _("Lasted for %s").printf(duration);
+                    break;
+                case Call.State.MISSED:
+                    image.set_from_icon_name("dino-phone-missed-symbolic", IconSize.LARGE_TOOLBAR);
+                    title_label.label = _("Call missed");
+                    string who = null;
+                    if (call.direction == Call.DIRECTION_INCOMING) {
+                        who = "You";
+                    } else {
+                        who = Util.get_participant_display_name(stream_interactor, conversation, call.to);
+                    }
+                    subtitle_label.label = "%s missed this call".printf(who);
+                    break;
+                case Call.State.DECLINED:
+                    image.set_from_icon_name("dino-phone-hangup-symbolic", IconSize.LARGE_TOOLBAR);
+                    title_label.label = _("Call declined");
+                    string who = null;
+                    if (call.direction == Call.DIRECTION_INCOMING) {
+                        who = "You";
+                    } else {
+                        who = Util.get_participant_display_name(stream_interactor, conversation, call.to);
+                    }
+                    subtitle_label.label = "%s declined this call".printf(who);
+                    break;
+                case Call.State.FAILED:
+                    image.set_from_icon_name("dino-phone-hangup-symbolic", IconSize.LARGE_TOOLBAR);
+                    title_label.label = _("Call failed");
+                    subtitle_label.label = "Call failed to establish";
+                    break;
+            }
+        }
+
+        private string get_duration_string(TimeSpan duration) {
+            DateTime a = new DateTime.now_utc();
+            DateTime b = new DateTime.now_utc();
+            a.difference(b);
+
+            TimeSpan remainder_duration = duration;
+
+            int hours = (int) Math.floor(remainder_duration / TimeSpan.HOUR);
+            remainder_duration -= hours * TimeSpan.HOUR;
+
+            int minutes = (int) Math.floor(remainder_duration / TimeSpan.MINUTE);
+            remainder_duration -= minutes * TimeSpan.MINUTE;
+
+            string ret = "";
+
+            if (hours > 0) {
+                ret += n("%i hour", "%i hours", hours).printf(hours);
+            }
+
+            if (minutes > 0) {
+                if (ret.length > 0) {
+                    ret += " ";
+                }
+                ret += n("%i minute", "%i minutes", minutes).printf(minutes);
+            }
+
+            if (ret.length > 0) {
+                return ret;
+            }
+
+            return _("seconds");
+        }
+
+        private int get_next_time_change() {
+            DateTime now = new DateTime.now_local();
+            DateTime item_time = call.local_time;
+
+            if (now.get_second() < item_time.get_second()) {
+                return item_time.get_second() - now.get_second();
+            } else {
+                return 60 - (now.get_second() - item_time.get_second());
+            }
+        }
+
+        public override void dispose() {
+            base.dispose();
+
+            if (time_update_handler_id != 0) {
+                Source.remove(time_update_handler_id);
+                time_update_handler_id = 0;
+            }
+        }
+    }
+}
diff --git a/main/src/ui/conversation_content_view/content_populator.vala b/main/src/ui/conversation_content_view/content_populator.vala
index 97f15bf9..ef859bde 100644
--- a/main/src/ui/conversation_content_view/content_populator.vala
+++ b/main/src/ui/conversation_content_view/content_populator.vala
@@ -68,7 +68,10 @@ public class ContentProvider : ContentItemCollection, Object {
             return new MessageMetaItem(content_item, stream_interactor);
         } else if (content_item.type_ == FileItem.TYPE) {
             return new FileMetaItem(content_item, stream_interactor);
+        } else if (content_item.type_ == CallItem.TYPE) {
+            return new CallMetaItem(content_item, stream_interactor);
         }
+        critical("Got unknown content item type %s", content_item.type_);
         return null;
     }
 }
@@ -85,6 +88,7 @@ public abstract class ContentMetaItem : Plugins.MetaConversationItem {
         this.mark = content_item.mark;
 
         content_item.bind_property("mark", this, "mark");
+        content_item.bind_property("encryption", this, "encryption");
 
         this.can_merge = true;
         this.requires_avatar = true;
diff --git a/main/src/ui/conversation_content_view/conversation_item_skeleton.vala b/main/src/ui/conversation_content_view/conversation_item_skeleton.vala
index c0099bf4..bcb6864e 100644
--- a/main/src/ui/conversation_content_view/conversation_item_skeleton.vala
+++ b/main/src/ui/conversation_content_view/conversation_item_skeleton.vala
@@ -104,7 +104,7 @@ public class ItemMetaDataHeader : Box {
     [GtkChild] public Label dot_label;
     [GtkChild] public Label time_label;
     public Image received_image = new Image() { opacity=0.4 };
-    public Image? unencrypted_image = null;
+    public Widget? encryption_image = null;
 
     public static IconSize ICON_SIZE_HEADER = Gtk.icon_size_register("im.dino.Dino.HEADER_ICON", 17, 12);
 
@@ -124,50 +124,66 @@ public class ItemMetaDataHeader : Box {
         update_name_label();
         name_label.style_updated.connect(update_name_label);
 
+        conversation.notify["encryption"].connect(update_unencrypted_icon);
+        item.notify["encryption"].connect(update_encryption_icon);
+        update_encryption_icon();
+
+        this.add(received_image);
+
+        if (item.time != null) {
+            update_time();
+        }
+
+        item.bind_property("mark", this, "item-mark");
+        this.notify["item-mark"].connect_after(update_received_mark);
+        update_received_mark();
+    }
+
+    private void update_encryption_icon() {
         Application app = GLib.Application.get_default() as Application;
 
         ContentMetaItem ci = item as ContentMetaItem;
-        if (ci != null) {
+        if (item.encryption != Encryption.NONE && ci != null) {
+            Widget? widget = null;
             foreach(var e in app.plugin_registry.encryption_list_entries) {
                 if (e.encryption == item.encryption) {
-                    Object? w = e.get_encryption_icon(conversation, ci.content_item);
-                    if (w != null) {
-                        this.add(w as Widget);
-                    } else {
-                        Image image = new Image.from_icon_name("dino-changes-prevent-symbolic", ICON_SIZE_HEADER) { opacity=0.4, visible = true };
-                        this.add(image);
-                    }
+                    widget = e.get_encryption_icon(conversation, ci.content_item) as Widget;
                     break;
                 }
             }
+            if (widget == null) {
+                widget = new Image.from_icon_name("dino-changes-prevent-symbolic", ICON_SIZE_HEADER) { opacity=0.4, visible = true };
+            }
+            update_encryption_image(widget);
         }
         if (item.encryption == Encryption.NONE) {
-            conversation.notify["encryption"].connect(update_unencrypted_icon);
             update_unencrypted_icon();
         }
+    }
 
-        this.add(received_image);
-
-        if (item.time != null) {
-            update_time();
+    private void update_unencrypted_icon() {
+        if (item.encryption != Encryption.NONE) return;
+
+        if (conversation.encryption != Encryption.NONE && encryption_image == null) {
+            Image image = new Image() { opacity=0.4, visible = true };
+            image.set_from_icon_name("dino-changes-allowed-symbolic", ICON_SIZE_HEADER);
+            image.tooltip_text = _("Unencrypted");
+            update_encryption_image(image);
+            Util.force_error_color(image);
+        } else if (conversation.encryption == Encryption.NONE && encryption_image != null) {
+            update_encryption_image(null);
         }
-
-        item.bind_property("mark", this, "item-mark");
-        this.notify["item-mark"].connect_after(update_received_mark);
-        update_received_mark();
     }
 
-    private void update_unencrypted_icon() {
-        if (conversation.encryption != Encryption.NONE && unencrypted_image == null) {
-            unencrypted_image = new Image() { opacity=0.4, visible = true };
-            unencrypted_image.set_from_icon_name("dino-changes-allowed-symbolic", ICON_SIZE_HEADER);
-            unencrypted_image.tooltip_text = _("Unencrypted");
-            this.add(unencrypted_image);
-            this.reorder_child(unencrypted_image, 3);
-            Util.force_error_color(unencrypted_image);
-        } else if (conversation.encryption == Encryption.NONE && unencrypted_image != null) {
-            this.remove(unencrypted_image);
-            unencrypted_image = null;
+    private void update_encryption_image(Widget? widget) {
+        if (encryption_image != null) {
+            this.remove(encryption_image);
+            encryption_image = null;
+        }
+        if (widget != null) {
+            this.add(widget);
+            this.reorder_child(widget, 3);
+            encryption_image = widget;
         }
     }
 
diff --git a/main/src/ui/conversation_content_view/file_widget.vala b/main/src/ui/conversation_content_view/file_widget.vala
index 9b748876..7d77ba11 100644
--- a/main/src/ui/conversation_content_view/file_widget.vala
+++ b/main/src/ui/conversation_content_view/file_widget.vala
@@ -32,9 +32,6 @@ public class FileWidget : SizeRequestBox {
         DEFAULT
     }
 
-    private const int MAX_HEIGHT = 300;
-    private const int MAX_WIDTH = 600;
-
     private StreamInteractor stream_interactor;
     private FileTransfer file_transfer;
     public FileTransfer.State file_transfer_state { get; set; }
diff --git a/main/src/ui/conversation_selector/conversation_selector_row.vala b/main/src/ui/conversation_selector/conversation_selector_row.vala
index cd513d13..6f181a64 100644
--- a/main/src/ui/conversation_selector/conversation_selector_row.vala
+++ b/main/src/ui/conversation_selector/conversation_selector_row.vala
@@ -198,6 +198,14 @@ public class ConversationSelectorRow : ListBoxRow {
                         message_label.label = (file_is_image ? _("Image received") : _("File received") );
                     }
                     break;
+                case CallItem.TYPE:
+                    CallItem call_item = (CallItem) last_content_item;
+                    Call call = call_item.call;
+
+                    nick_label.label = call.direction == Call.DIRECTION_OUTGOING ? _("Me") + ": " : "";
+                    message_label.attributes.insert(attr_style_new(Pango.Style.ITALIC));
+                    message_label.label = call.direction == Call.DIRECTION_OUTGOING ? _("Outgoing call") : _("Incoming call");
+                    break;
             }
             nick_label.visible = true;
             message_label.visible = true;
diff --git a/main/src/ui/conversation_titlebar/call_entry.vala b/main/src/ui/conversation_titlebar/call_entry.vala
new file mode 100644
index 00000000..9353f631
--- /dev/null
+++ b/main/src/ui/conversation_titlebar/call_entry.vala
@@ -0,0 +1,132 @@
+using Xmpp;
+using Gtk;
+using Gee;
+
+using Dino.Entities;
+
+namespace Dino.Ui {
+
+    public class CallTitlebarEntry : Plugins.ConversationTitlebarEntry, Object {
+        public string id { get { return "call"; } }
+
+        public CallButton call_button;
+
+        private StreamInteractor stream_interactor;
+
+        public CallTitlebarEntry(StreamInteractor stream_interactor) {
+            this.stream_interactor = stream_interactor;
+
+            call_button = new CallButton(stream_interactor) { tooltip_text=_("Start call") };
+            call_button.set_image(new Gtk.Image.from_icon_name("dino-phone-symbolic", Gtk.IconSize.MENU) { visible=true });
+        }
+
+        public double order { get { return 4; } }
+        public Plugins.ConversationTitlebarWidget? get_widget(Plugins.WidgetType type) {
+            if (type == Plugins.WidgetType.GTK) {
+                return call_button;
+            }
+            return null;
+        }
+    }
+
+    public class CallButton : Plugins.ConversationTitlebarWidget, Gtk.MenuButton {
+
+        private StreamInteractor stream_interactor;
+        private Conversation conversation;
+
+        private ModelButton audio_button = new ModelButton() { text="Audio call", visible=true };
+        private ModelButton video_button = new ModelButton() { text="Video call", visible=true };
+
+        public CallButton(StreamInteractor stream_interactor) {
+            this.stream_interactor = stream_interactor;
+
+            use_popover = true;
+            image = new Gtk.Image.from_icon_name("dino-phone-symbolic", Gtk.IconSize.MENU) { visible=true };
+
+            Gtk.PopoverMenu popover_menu = new Gtk.PopoverMenu();
+            Box box = new Box(Orientation.VERTICAL, 0) { margin=10, visible=true };
+            audio_button.clicked.connect(() => {
+                stream_interactor.get_module(Calls.IDENTITY).initiate_call.begin(conversation, false, (_, res) => {
+                    Call call = stream_interactor.get_module(Calls.IDENTITY).initiate_call.end(res);
+                    open_call_window(call);
+                });
+            });
+            box.add(audio_button);
+
+            video_button.clicked.connect(() => {
+                stream_interactor.get_module(Calls.IDENTITY).initiate_call.begin(conversation, true, (_, res) => {
+                    Call call = stream_interactor.get_module(Calls.IDENTITY).initiate_call.end(res);
+                    open_call_window(call);
+                });
+            });
+            box.add(video_button);
+            popover_menu.add(box);
+
+            popover = popover_menu;
+
+            clicked.connect(() => {
+                popover_menu.visible = true;
+            });
+
+            stream_interactor.get_module(Calls.IDENTITY).call_incoming.connect((call, conversation) => {
+                update_button_state();
+            });
+
+            stream_interactor.get_module(Calls.IDENTITY).call_terminated.connect((call) => {
+                update_button_state();
+            });
+            stream_interactor.get_module(PresenceManager.IDENTITY).show_received.connect((jid, account) => {
+                if (this.conversation.counterpart.equals_bare(jid) && this.conversation.account.equals(account)) {
+                    update_visibility.begin();
+                }
+            });
+            stream_interactor.connection_manager.connection_state_changed.connect((account, state) => {
+                update_visibility.begin();
+            });
+        }
+
+        private void open_call_window(Call call) {
+            var call_window = new CallWindow();
+            var call_controller = new CallWindowController(call_window, call, stream_interactor);
+            call_window.controller = call_controller;
+            call_window.present();
+
+            update_button_state();
+        }
+
+        public new void set_conversation(Conversation conversation) {
+            this.conversation = conversation;
+
+            update_visibility.begin();
+            update_button_state();
+        }
+
+        private void update_button_state() {
+            Jid? call_counterpart = stream_interactor.get_module(Calls.IDENTITY).is_call_in_progress();
+            this.sensitive = call_counterpart == null;
+
+            if (call_counterpart != null && call_counterpart.equals_bare(conversation.counterpart)) {
+                this.set_image(new Gtk.Image.from_icon_name("dino-phone-in-talk-symbolic", Gtk.IconSize.MENU) { visible=true });
+            } else {
+                this.set_image(new Gtk.Image.from_icon_name("dino-phone-symbolic", Gtk.IconSize.MENU) { visible=true });
+            }
+        }
+
+        private async void update_visibility() {
+            if (conversation.type_ == Conversation.Type.CHAT) {
+                Conversation conv_bak = conversation;
+                bool audio_works = yield stream_interactor.get_module(Calls.IDENTITY).can_do_audio_calls_async(conversation);
+                bool video_works = yield stream_interactor.get_module(Calls.IDENTITY).can_do_video_calls_async(conversation);
+                if (conv_bak != conversation) return;
+
+                visible = audio_works;
+                video_button.visible = video_works;
+            } else {
+                visible = false;
+            }
+        }
+
+        public new void unset_conversation() { }
+    }
+
+}
diff --git a/main/src/ui/conversation_view_controller.vala b/main/src/ui/conversation_view_controller.vala
index dcd3e1c7..a9a94738 100644
--- a/main/src/ui/conversation_view_controller.vala
+++ b/main/src/ui/conversation_view_controller.vala
@@ -87,6 +87,7 @@ public class ConversationViewController : Object {
         app.plugin_registry.register_contact_titlebar_entry(new MenuEntry(stream_interactor));
         app.plugin_registry.register_contact_titlebar_entry(search_menu_entry);
         app.plugin_registry.register_contact_titlebar_entry(new OccupantsEntry(stream_interactor));
+        app.plugin_registry.register_contact_titlebar_entry(new CallTitlebarEntry(stream_interactor));
         foreach(var entry in app.plugin_registry.conversation_titlebar_entries) {
             titlebar.insert_entry(entry);
         }
diff --git a/main/src/ui/notifier_freedesktop.vala b/main/src/ui/notifier_freedesktop.vala
index ecb5dc66..78ed2d1e 100644
--- a/main/src/ui/notifier_freedesktop.vala
+++ b/main/src/ui/notifier_freedesktop.vala
@@ -14,6 +14,7 @@ public class Dino.Ui.FreeDesktopNotifier : NotificationProvider, Object {
     private HashMap<Conversation, uint32> content_notifications = new HashMap<Conversation, uint32>(Conversation.hash_func, Conversation.equals_func);
     private HashMap<Conversation, Gee.List<uint32>> conversation_notifications = new HashMap<Conversation, Gee.List<uint32>>(Conversation.hash_func, Conversation.equals_func);
     private HashMap<uint32, HashMap<string, ListenerFuncWrapper>> action_listeners = new HashMap<uint32, HashMap<string, ListenerFuncWrapper>>();
+    private HashMap<Call, uint32> call_notifications = new HashMap<Call, uint32>(Call.hash_func, Call.equals_func);
 
     private FreeDesktopNotifier(StreamInteractor stream_interactor) {
         this.stream_interactor = stream_interactor;
@@ -110,6 +111,43 @@ public class Dino.Ui.FreeDesktopNotifier : NotificationProvider, Object {
         }
     }
 
+    public async void notify_call(Call call, Conversation conversation, bool video, string conversation_display_name) {
+        string summary = Markup.escape_text(conversation_display_name);
+        string body =  video ? _("Incoming video call") : _("Incoming call");
+
+        HashTable<string, Variant> hash_table = new HashTable<string, Variant>(null, null);
+        hash_table["image-path"] = "call-start-symbolic";
+        hash_table["sound-name"] = new Variant.string("phone-incoming-call");
+        hash_table["urgency"] = new Variant.byte(2);
+        string[] actions = new string[] {"default", "Open conversation", "reject", _("Reject"), "accept", _("Accept")};
+        try {
+            uint32 notification_id = dbus_notifications.notify("Dino", 0, "", summary, body, actions, hash_table, 0);
+            call_notifications[call] = notification_id;
+
+            add_action_listener(notification_id, "default", () => {
+                GLib.Application.get_default().activate_action("open-conversation", new Variant.int32(conversation.id));
+            });
+            add_action_listener(notification_id, "reject", () => {
+                GLib.Application.get_default().activate_action("deny-call", new Variant.int32(call.id));
+            });
+            add_action_listener(notification_id, "accept", () => {
+                GLib.Application.get_default().activate_action("accept-call", new Variant.int32(call.id));
+            });
+        } catch (Error e) {
+            warning("Failed showing subscription request notification: %s", e.message);
+        }
+    }
+
+    public async void retract_call_notification(Call call, Conversation conversation) {
+        if (!call_notifications.has_key(call)) return;
+        uint32 notification_id = call_notifications[call];
+        try {
+            dbus_notifications.close_notification(notification_id);
+            action_listeners.unset(notification_id);
+            call_notifications.unset(call);
+        } catch (Error e) { }
+    }
+
     public async void notify_subscription_request(Conversation conversation) {
         string summary = _("Subscription request");
         string body = Markup.escape_text(conversation.counterpart.to_string());
diff --git a/main/src/ui/notifier_gnotifications.vala b/main/src/ui/notifier_gnotifications.vala
index 31d1ffa3..5fd3be4b 100644
--- a/main/src/ui/notifier_gnotifications.vala
+++ b/main/src/ui/notifier_gnotifications.vala
@@ -65,6 +65,25 @@ namespace Dino.Ui {
             }
         }
 
+        public async void notify_call(Call call, Conversation conversation, bool video, string conversation_display_name) {
+            Notification notification = new Notification(conversation_display_name);
+            string body = _("Incoming call");
+            notification.set_body(body);
+            notification.set_urgent(true);
+
+            notification.set_icon(new ThemedIcon.from_names(new string[] {"call-start-symbolic"}));
+
+            notification.set_default_action_and_target_value("app.open-conversation", new Variant.int32(conversation.id));
+            notification.add_button_with_target_value(_("Deny"), "app.deny-call", new Variant.int32(call.id));
+            notification.add_button_with_target_value(_("Accept"), "app.accept-call", new Variant.int32(call.id));
+
+            GLib.Application.get_default().send_notification(call.id.to_string(), notification);
+        }
+
+        private async void retract_call_notification(Call call, Conversation conversation) {
+            GLib.Application.get_default().withdraw_notification(call.id.to_string());
+        }
+
         public async void notify_subscription_request(Conversation conversation) {
             Notification notification = new Notification(_("Subscription request"));
             notification.set_body(conversation.counterpart.to_string());
diff --git a/main/src/ui/util/helper.vala b/main/src/ui/util/helper.vala
index b6c9cb5a..17dfd334 100644
--- a/main/src/ui/util/helper.vala
+++ b/main/src/ui/util/helper.vala
@@ -122,15 +122,15 @@ public static string get_participant_display_name(StreamInteractor stream_intera
     return Dino.get_participant_display_name(stream_interactor, conversation, participant, me_is_me ? _("Me") : null);
 }
 
-private static string? get_real_display_name(StreamInteractor stream_interactor, Account account, Jid jid, bool me_is_me = false) {
+public static string? get_real_display_name(StreamInteractor stream_interactor, Account account, Jid jid, bool me_is_me = false) {
     return Dino.get_real_display_name(stream_interactor, account, jid, me_is_me ? _("Me") : null);
 }
 
-private static string get_groupchat_display_name(StreamInteractor stream_interactor, Account account, Jid jid) {
+public static string get_groupchat_display_name(StreamInteractor stream_interactor, Account account, Jid jid) {
     return Dino.get_groupchat_display_name(stream_interactor, account, jid);
 }
 
-private static string get_occupant_display_name(StreamInteractor stream_interactor, Conversation conversation, Jid jid, bool me_is_me = false, bool muc_real_name = false) {
+public static string get_occupant_display_name(StreamInteractor stream_interactor, Conversation conversation, Jid jid, bool me_is_me = false, bool muc_real_name = false) {
     return Dino.get_occupant_display_name(stream_interactor, conversation, jid, me_is_me ? _("Me") : null);
 }
 
@@ -194,6 +194,15 @@ public static bool is_24h_format() {
     return is24h == 1;
 }
 
+public static string format_time(DateTime datetime, string format_24h, string format_12h) {
+    string format = Util.is_24h_format() ? format_24h : format_12h;
+    if (!get_charset(null)) {
+        // No UTF-8 support, use simple colon for time instead
+        format = format.replace("∶", ":");
+    }
+    return datetime.format(format);
+}
+
 public static Regex get_url_regex() {
     if (URL_REGEX == null) {
         URL_REGEX = /\b(((http|ftp)s?:\/\/|(ircs?|xmpp|mailto|sms|smsto|mms|tel|geo|openpgp4fpr|im|news|nntp|sip|ssh|bitcoin|sftp|magnet|vnc|urn):)\S+)/;