[geary/wip/765516-gtk-widget-conversation-viewer: 169/187] Add ConversationEmail::message_bodies_loaded prop, hook it up.

[Michael Gratton <mjog src gnome org>]

commit 8b3c8a5e837c2e6d1e8541e1ae1c5124dc79d520
Author: Michael James Gratton <mike vee net>
Date:   Mon Sep 12 15:07:42 2016 +1000

    Add ConversationEmail::message_bodies_loaded prop, hook it up.

 .../conversation-viewer/conversation-email.vala    |   21 ++++++++++++++++++-
 1 files changed, 19 insertions(+), 2 deletions(-)
---
diff --git a/src/client/conversation-viewer/conversation-email.vala 
b/src/client/conversation-viewer/conversation-email.vala
index 12e2f05..c77e911 100644
--- a/src/client/conversation-viewer/conversation-email.vala
+++ b/src/client/conversation-viewer/conversation-email.vala
@@ -257,6 +257,9 @@ public class ConversationEmail : Gtk.Box {
         owned get { return this._attached_messages.read_only_view; }
     }
 
+    /** Determines if all message's web views have finished loading. */
+    public bool message_bodies_loaded { get; private set; default = false; }
+
     /** The embedded composer for this email, if any. */
     public ComposerEmbed composer { get; private set; default = null; }
 
@@ -596,11 +599,25 @@ public class ConversationEmail : Gtk.Box {
     }
 
     private void connect_message_view_signals(ConversationMessage view) {
-        view.flag_remote_images.connect(on_flag_remote_images);
-        view.remember_remote_images.connect(on_remember_remote_images);
         view.attachment_displayed_inline.connect((id) => {
                 inlined_content_ids.add(id);
             });
+        view.flag_remote_images.connect(on_flag_remote_images);
+        view.remember_remote_images.connect(on_remember_remote_images);
+        view.web_view.notify["load-status"].connect(() => {
+                bool all_loaded = true;
+                message_view_iterator().foreach((view) => {
+                        if (view.web_view.load_status !=
+                                WebKit.LoadStatus.FINISHED) {
+                            all_loaded = false;
+                            return false;
+                        }
+                        return true;
+                    });
+                if (all_loaded == true) {
+                    this.message_bodies_loaded = true;
+                }
+            });
         view.web_view.selection_changed.connect(() => {
                 on_message_selection_changed(view);
             });