4 files changed, 79 insertions, 0 deletions

diff --git a/src/ui/chat.c b/src/ui/chat.c
index 42ccb9e..5dd11f6 100644
--- a/src/ui/chat.c
+++ b/src/ui/chat.c
@@ -95,6 +95,29 @@ handle_chat_contacts_listbox_row_activated(GtkListBox *listbox,
 }
 
 static void
+handle_chat_messages_listbox_size_allocate(UNUSED GtkWidget *widget,
+                                           UNUSED GdkRectangle *allocation,
+                                           gpointer user_data)
+{
+  UI_CHAT_Handle *handle = (UI_CHAT_Handle*) user_data;
+
+  GtkAdjustment *adjustment = gtk_scrolled_window_get_vadjustment(
+      handle->chat_scrolled_window
+  );
+
+  const gdouble value = gtk_adjustment_get_value(adjustment);
+  const gdouble upper = gtk_adjustment_get_upper(adjustment);
+  const gdouble page_size = gtk_adjustment_get_page_size(adjustment);
+
+  const gdouble edge_value = upper - page_size;
+
+  if (value >= handle->edge_value)
+    gtk_adjustment_set_value(adjustment, edge_value);
+
+  handle->edge_value = upper - page_size;
+}
+
+static void
 handle_back_button_click(UNUSED GtkButton *button,
                          gpointer user_data)
 {
@@ -254,6 +277,7 @@ ui_chat_new(MESSENGER_Application *app)
   UI_MESSENGER_Handle *messenger = &(app->ui.messenger);
 
   handle->messages = NULL;
+  handle->edge_value = 0;
 
   handle->builder = gtk_builder_new_from_file(
       "resources/ui/chat.ui"
@@ -324,6 +348,10 @@ ui_chat_new(MESSENGER_Application *app)
       gtk_builder_get_object(handle->builder, "chat_details_contacts_box")
   );
 
+  handle->chat_scrolled_window = GTK_SCROLLED_WINDOW(
+      gtk_builder_get_object(handle->builder, "chat_scrolled_window")
+  );
+
   handle->chat_contacts_listbox = GTK_LIST_BOX(
       gtk_builder_get_object(handle->builder, "chat_contacts_listbox")
   );
@@ -339,6 +367,13 @@ ui_chat_new(MESSENGER_Application *app)
       gtk_builder_get_object(handle->builder, "messages_listbox")
   );
 
+  g_signal_connect(
+      handle->messages_listbox,
+      "size-allocate",
+      G_CALLBACK(handle_chat_messages_listbox_size_allocate),
+      handle
+  );
+
   handle->attach_file_button = GTK_BUTTON(
       gtk_builder_get_object(handle->builder, "attach_file_button")
   );
diff --git a/src/ui/chat.h b/src/ui/chat.h
index f065f61..6619506 100644
--- a/src/ui/chat.h
+++ b/src/ui/chat.h
@@ -37,6 +37,7 @@ typedef struct UI_PICKER_Handle UI_PICKER_Handle;
 typedef struct UI_CHAT_Handle
 {
   GList *messages;
+  gdouble edge_value;
 
   GtkBuilder *builder;
   GtkWidget *chat_box;
@@ -53,6 +54,8 @@ typedef struct UI_CHAT_Handle
   GtkButton *hide_chat_details_button;
   GtkBox *chat_details_contacts_box;
 
+  GtkScrolledWindow *chat_scrolled_window;
+
   GtkListBox *chat_contacts_listbox;
   GtkListBox *messages_listbox;
 
diff --git a/src/ui/message.c b/src/ui/message.c
index 4c89edb..6f379d7 100644
--- a/src/ui/message.c
+++ b/src/ui/message.c
@@ -106,6 +106,10 @@ ui_message_new(UI_MESSAGE_Type type,
       gtk_builder_get_object(builder, "read_receipt_image")
   );
 
+  handle->content_stack = GTK_STACK(
+      gtk_builder_get_object(builder, "content_stack")
+  );
+
   handle->text_label = GTK_LABEL(
       gtk_builder_get_object(builder, "text_label")
   );
@@ -129,9 +133,26 @@ ui_message_new(UI_MESSAGE_Type type,
 
   switch (content_type)
   {
+    case UI_MESSAGE_CONTENT_TEXT:
+      gtk_stack_set_visible_child(
+          handle->content_stack,
+          GTK_WIDGET(handle->text_label)
+      );
+      break;
     case UI_MESSAGE_CONTENT_FILE:
+      gtk_stack_set_visible_child(
+          handle->content_stack,
+          GTK_WIDGET(handle->file_revealer)
+      );
+
       gtk_revealer_set_reveal_child(handle->file_revealer, TRUE);
       break;
+    case UI_MESSAGE_CONTENT_PREVIEW:
+      gtk_stack_set_visible_child(
+          handle->content_stack,
+          GTK_WIDGET(handle->preview_drawing_area)
+      );
+      break;
     default:
       break;
   }
@@ -145,6 +166,18 @@ ui_message_new(UI_MESSAGE_Type type,
 }
 
 void
+ui_message_update(UI_MESSAGE_Handle *handle,
+                  struct GNUNET_CHAT_Message *msg)
+{
+  struct GNUNET_CHAT_File *file = GNUNET_CHAT_message_get_file(msg);
+
+  if (!file)
+    return;
+
+  // TODO
+}
+
+void
 ui_message_delete(UI_MESSAGE_Handle *handle)
 {
   g_object_unref(handle->builder);
diff --git a/src/ui/message.h b/src/ui/message.h
index b380960..704c33f 100644
--- a/src/ui/message.h
+++ b/src/ui/message.h
@@ -30,6 +30,8 @@
 #include <gtk-3.0/gtk/gtk.h>
 #include <libhandy-1/handy.h>
 
+#include <gnunet/gnunet_chat_lib.h>
+
 typedef struct MESSENGER_Application MESSENGER_Application;
 
 typedef enum UI_MESSAGE_Type
@@ -65,6 +67,8 @@ typedef struct UI_MESSAGE_Handle
   GtkLabel *timestamp_label;
   GtkImage *read_receipt_image;
 
+  GtkStack *content_stack;
+
   GtkLabel *text_label;
   GtkRevealer *file_revealer;
   GtkDrawingArea *preview_drawing_area;
@@ -75,6 +79,10 @@ ui_message_new(UI_MESSAGE_Type type,
                UI_MESSAGE_ContentType content_type);
 
 void
+ui_message_update(UI_MESSAGE_Handle *handle,
+                  struct GNUNET_CHAT_Message *message);
+
+void
 ui_message_delete(UI_MESSAGE_Handle *handle);
 
 #endif /* UI_MESSAGE_H_ */