[geary/wip/geary-inspector: 30/38] Append new log records to the inspector and scroll to them

[Michael Gratton <mjog src gnome org>]

commit 955449b7022b65f06c3953e1d860c2f10bcfc17d
Author: Michael Gratton <mike vee net>
Date:   Sun Apr 7 11:32:38 2019 +1000

    Append new log records to the inspector and scroll to them

 src/client/components/components-inspector.vala | 58 ++++++++++++++++++++++---
 src/engine/imap-db/imap-db-attachment.vala      | 12 +++--
 ui/components-inspector.ui                      |  8 ++--
 3 files changed, 62 insertions(+), 16 deletions(-)
---
diff --git a/src/client/components/components-inspector.vala b/src/client/components/components-inspector.vala
index 321176be..bee621b3 100644
--- a/src/client/components/components-inspector.vala
+++ b/src/client/components/components-inspector.vala
@@ -36,6 +36,9 @@ public class Components.Inspector : Gtk.Window {
     [GtkChild]
     private Gtk.SearchEntry search_entry;
 
+    [GtkChild]
+    private Gtk.ScrolledWindow logs_scroller;
+
     [GtkChild]
     private Gtk.TreeView logs_view;
 
@@ -58,6 +61,8 @@ public class Components.Inspector : Gtk.Window {
 
     private string details;
 
+    private bool autoscroll = true;
+
 
     public Inspector(GearyApplication app) {
         this.title = this.header_bar.title = _("Inspector");
@@ -81,15 +86,14 @@ public class Components.Inspector : Gtk.Window {
         }
         this.details = details.str;
 
-        // Log a marker for when the inspector was opened
-        debug("---- 8< ---- %s ---- 8< ----", this.header_bar.title);
+        enable_log_updates(true);
 
         Gtk.ListStore logs_store = this.logs_store;
         Geary.Logging.Record? logs = Geary.Logging.get_logs();
         int index = 0;
         while (logs != null) {
             Gtk.TreeIter iter;
-            logs_store.append(out iter);
+            logs_store.insert(out iter, index++);
             logs_store.set_value(iter, COL_MESSAGE, logs.format());
             logs = logs.get_next();
         }
@@ -117,6 +121,13 @@ public class Components.Inspector : Gtk.Window {
         this.logs_view.set_model(this.logs_filter);
     }
 
+    public override void destroy() {
+        // Don't use enable_log_updates() here because we don't want a
+        // marker logged.
+        Geary.Logging.set_log_listener(null);
+        base.destroy();
+    }
+
     public override bool key_press_event(Gdk.EventKey event) {
         bool ret = this.search_bar.handle_event(event);
         if (ret == Gdk.EVENT_PROPAGATE) {
@@ -125,6 +136,16 @@ public class Components.Inspector : Gtk.Window {
         return ret;
     }
 
+    private void enable_log_updates(bool enabled) {
+        // Log a marker it indicate when it was toggled
+        debug("---- 8< ---- %s ---- 8< ----", this.header_bar.title);
+        if (enabled) {
+            Geary.Logging.set_log_listener(this.on_log_record);
+        } else {
+            Geary.Logging.set_log_listener(null);
+        }
+    }
+
     private async void save(string path,
                             GLib.Cancellable? cancellable)
         throws GLib.Error {
@@ -167,11 +188,22 @@ public class Components.Inspector : Gtk.Window {
         this.search_button.set_visible(logs_visible);
     }
 
+    private void update_scrollbar() {
+        Gtk.Adjustment adj = this.logs_scroller.get_vadjustment();
+        adj.set_value(adj.upper - adj.page_size);
+    }
+
     private void update_logs_filter() {
         this.logs_filter_terms = this.search_entry.text.split(" ");
         this.logs_filter.refilter();
     }
 
+    private void append_record(Geary.Logging.Record record) {
+        Gtk.TreeIter inserted_iter;
+        this.logs_store.append(out inserted_iter);
+        this.logs_store.set_value(inserted_iter, COL_MESSAGE, record.format());
+    }
+
     [GtkCallback]
     private void on_visible_child_changed() {
         update_ui();
@@ -240,6 +272,13 @@ public class Components.Inspector : Gtk.Window {
         this.search_bar.set_search_mode(!this.search_bar.get_search_mode());
     }
 
+    [GtkCallback]
+    private void on_logs_size_allocate() {
+        if (this.autoscroll) {
+            update_scrollbar();
+        }
+    }
+
     [GtkCallback]
     private void on_logs_selection_changed() {
         update_ui();
@@ -250,9 +289,16 @@ public class Components.Inspector : Gtk.Window {
         update_logs_filter();
     }
 
-    [GtkCallback]
-    private void on_destroy() {
-        destroy();
+    private void on_log_record(Geary.Logging.Record record) {
+        if (GLib.MainContext.default() ==
+            GLib.MainContext.get_thread_default()) {
+            append_record(record);
+        } else {
+            GLib.Idle.add(() => {
+                    append_record(record);
+                    return GLib.Source.REMOVE;
+                });
+        }
     }
 
 }
diff --git a/src/engine/imap-db/imap-db-attachment.vala b/src/engine/imap-db/imap-db-attachment.vala
index f840aeb8..60c7028c 100644
--- a/src/engine/imap-db/imap-db-attachment.vala
+++ b/src/engine/imap-db/imap-db-attachment.vala
@@ -95,9 +95,9 @@ private class Geary.ImapDB.Attachment : Geary.Attachment {
             save_file(part, attachments_dir, cancellable);
             update_db(cx, cancellable);
         } catch (Error err) {
-            // Don't honour the cancellable here, we need to delete
-            // it.
-            this.delete(cx, cancellable);
+            // Don't honour the cancellable here, it needs to be
+            // deleted
+            this.delete(cx, null);
             throw err;
         }
     }
@@ -161,10 +161,8 @@ private class Geary.ImapDB.Attachment : Geary.Attachment {
         // create directory, but don't throw exception if already exists
         try {
             target.get_parent().make_directory_with_parents(cancellable);
-        } catch (IOError ioe) {
-            // fall through if already exists
-            if (!(ioe is IOError.EXISTS))
-                throw ioe;
+        } catch (IOError.EXISTS err) {
+            // All good
         }
 
         // Delete any existing file now since we might not be creating
diff --git a/ui/components-inspector.ui b/ui/components-inspector.ui
index d62575b1..732b2845 100644
--- a/ui/components-inspector.ui
+++ b/ui/components-inspector.ui
@@ -18,7 +18,6 @@
     <property name="can_focus">False</property>
     <property name="default_width">750</property>
     <property name="default_height">500</property>
-    <signal name="destroy" handler="on_destroy" swapped="no"/>
     <child type="titlebar">
       <object class="GtkHeaderBar" id="header_bar">
         <property name="visible">True</property>
@@ -50,6 +49,8 @@
           <object class="GtkButton" id="save_as_button">
             <property name="visible">True</property>
             <property name="can_focus">True</property>
+            <property name="tooltip_text" translatable="yes"
+                      comments="Tooltip for inspector button">Save logs and details to a file</property>
             <property name="receives_default">True</property>
             <signal name="clicked" handler="on_save_as_clicked" swapped="no"/>
             <child>
@@ -69,13 +70,13 @@
           <object class="GtkButton" id="copy_button">
             <property name="visible">True</property>
             <property name="can_focus">True</property>
+            <property name="tooltip_text" translatable="yes" comments="Tooltip for inspector button">Copy 
selected rows</property>
             <property name="receives_default">True</property>
             <signal name="clicked" handler="on_copy_clicked" swapped="no"/>
             <child>
               <object class="GtkImage">
                 <property name="visible">True</property>
                 <property name="can_focus">False</property>
-                <property name="tooltip_text" translatable="yes" comments="Tooltip for inspector 
button">Copy selected rows</property>
                 <property name="icon_name">edit-copy-symbolic</property>
               </object>
             </child>
@@ -119,7 +120,7 @@
               </packing>
             </child>
             <child>
-              <object class="GtkScrolledWindow">
+              <object class="GtkScrolledWindow" id="logs_scroller">
                 <property name="visible">True</property>
                 <property name="can_focus">True</property>
                 <property name="vexpand">True</property>
@@ -132,6 +133,7 @@
                     <property name="headers_visible">False</property>
                     <property name="enable_search">False</property>
                     <property name="show_expanders">False</property>
+                    <signal name="size-allocate" handler="on_logs_size_allocate" swapped="no"/>
                     <child internal-child="selection">
                       <object class="GtkTreeSelection">
                         <property name="mode">multiple</property>