[gnome-boxes] Add TransferPopover

[Felipe Borges <felipeborges src gnome org>]

commit 44ae83785f353a0426311ec946bc4ee36c5a8c89
Author: Visarion Alexandru <viorel visarion gmail com>
Date:   Thu Dec 14 19:26:09 2017 +0200

    Add TransferPopover
    
    Add a popover capable of letting users visualize/manage
    ongoing transfers between the host and a guest machine,
    using the previously introduced TransferInfoRow
    
    https://bugzilla.gnome.org/show_bug.cgi?id=762321

 data/gnome-boxes.gresource.xml |  1 +
 data/ui/transfer-popover.ui    | 21 +++++++++
 src/Makefile.am                |  1 +
 src/meson.build                |  1 +
 src/transfer-popover.vala      | 96 ++++++++++++++++++++++++++++++++++++++++++
 5 files changed, 120 insertions(+)
---
diff --git a/data/gnome-boxes.gresource.xml b/data/gnome-boxes.gresource.xml
index df3de724..01c72d59 100644
--- a/data/gnome-boxes.gresource.xml
+++ b/data/gnome-boxes.gresource.xml
@@ -31,6 +31,7 @@
     <file preprocess="xml-stripblanks">ui/snapshot-list-row.ui</file>
     <file preprocess="xml-stripblanks">ui/topbar.ui</file>
     <file preprocess="xml-stripblanks">ui/transfer-info-row.ui</file>
+    <file preprocess="xml-stripblanks">ui/transfer-popover.ui</file>
     <file preprocess="xml-stripblanks">ui/troubleshoot-log.ui</file>
     <file preprocess="xml-stripblanks">ui/troubleshoot-view.ui</file>
     <file preprocess="xml-stripblanks">ui/unattended-setup-box.ui</file>
diff --git a/data/ui/transfer-popover.ui b/data/ui/transfer-popover.ui
new file mode 100644
index 00000000..ddbbc084
--- /dev/null
+++ b/data/ui/transfer-popover.ui
@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<interface>
+  <template class="BoxesTransferPopover" parent="GtkPopover">
+    <child>
+      <object class="GtkScrolledWindow">
+        <property name="visible">True</property>
+        <property name="hscrollbar_policy">GTK_POLICY_NEVER</property>
+        <property name="max-content-height">270</property>
+        <property name="propagate-natural-height">True</property>
+        <child>
+          <object class="GtkBox" id="transfers_container">
+            <property name="orientation">vertical</property>
+            <property name="visible">True</property>
+            <property name="margin">12</property>
+            <property name="spacing">10</property>
+          </object>
+        </child>
+      </object>
+    </child>
+  </template>
+</interface>
diff --git a/src/Makefile.am b/src/Makefile.am
index 7ecb62e9..a6d8eace 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -161,6 +161,7 @@ gnome_boxes_SOURCES =                               \
        empty-boxes.vala                        \
        tracker-iso-query.vala                  \
        transfer-info-row.vala          \
+       transfer-popover.vala           \
        troubleshoot-log.vala                   \
        troubleshoot-view.vala                  \
        shared-folder-popover.vala              \
diff --git a/src/meson.build b/src/meson.build
index 4b9c66ec..7716668d 100644
--- a/src/meson.build
+++ b/src/meson.build
@@ -87,6 +87,7 @@ vala_sources = [
   'shared-folder-popover.vala',
   'spice-display.vala',
   'transfer-info-row.vala',
+  'transfer-popover.vala',
   'troubleshoot-view.vala',
   'topbar.vala',
   'ui.vala',
diff --git a/src/transfer-popover.vala b/src/transfer-popover.vala
new file mode 100644
index 00000000..d9a0d395
--- /dev/null
+++ b/src/transfer-popover.vala
@@ -0,0 +1,96 @@
+// This file is part of GNOME Boxes. License: LGPLv2+
+using Gtk;
+
+[GtkTemplate (ui = "/org/gnome/Boxes/ui/transfer-popover.ui")]
+private class Boxes.TransferPopover: Gtk.Popover {
+    [GtkChild]
+    public Gtk.Box transfers_container;
+
+    public signal void all_finished ();
+    public GLib.List<Spice.FileTransferTask> spice_tasks;
+    public double progress { get; set; }
+
+    private const uint remove_id_timeout = 5000;  // 5 seconds
+    private ulong total_bytes_id = 0;
+    private Boxes.DisplayToolbar display_toolbar;
+
+    public TransferPopover (Boxes.DisplayToolbar toolbar) {
+        display_toolbar = toolbar;
+    }
+
+    public void add_transfer (Object transfer_task) {
+        if (transfer_task is Spice.FileTransferTask) {
+            var spice_transfer_task = transfer_task as Spice.FileTransferTask;
+
+            add_spice_transfer (spice_transfer_task);
+        } else {
+            warning ("File transfer of unsupported type.");
+        }
+    }
+
+    public void add_spice_transfer (Spice.FileTransferTask transfer_task) {
+        spice_tasks.append (transfer_task);
+
+        var row = new Boxes.TransferInfoRow (transfer_task.file.get_basename ());
+        transfer_task.bind_property ("transferred-bytes", row, "transferred-bytes", 
BindingFlags.SYNC_CREATE);
+
+        total_bytes_id = transfer_task.notify["total-bytes"].connect ( (t, p) => {
+            row.total_bytes = transfer_task.total_bytes;
+
+            transfer_task.disconnect (total_bytes_id);
+        });
+
+        transfer_task.notify["progress"].connect ( (t, p) => {
+            row.progress = transfer_task.progress;
+
+            double total = 0;
+            double transferred = 0;
+            foreach (var task in spice_tasks) {
+               total += task.get_total_bytes ();
+               transferred += task.get_transferred_bytes ();
+            }
+
+            progress = transferred/total;
+        });
+        transfer_task.finished.connect ( (transfer_task, error) => {
+            if (error != null)
+                warning (error.message);
+
+            row.finalize_transfer ();
+            spice_tasks.remove (transfer_task);
+
+            if (spice_tasks.length () == 0) {
+                Timeout.add (remove_id_timeout, () => {
+                    all_finished ();
+
+                    return false;
+                });
+            }
+
+        });
+        row.finished.connect (() => {
+            spice_tasks.remove(transfer_task);
+
+            if (spice_tasks.length () == 0) {
+                Timeout.add (remove_id_timeout, () => {
+                        all_finished ();
+
+                        return false;
+                    });
+                }
+        });
+
+        transfers_container.pack_start (row);
+        row.show ();
+    }
+
+    public void clean_up () {
+        foreach (var row in transfers_container.get_children ()) {
+            transfers_container.remove (row);
+        }
+
+        popdown ();
+        display_toolbar.progress = 0;
+        display_toolbar.transfers_button.hide ();
+    }
+}