Add initial PhoshMountOperation

This implements GMountOperation's ask-password to handle th UI bits for
e.g. encrypted volumes. We can add other methods like `ask_question`
later on.
Signed-off-by: Guido Günther <guido.gunther@puri.sm>

src/meson.build

@@ -97,6 +97,8 @@ libphosh_tool_sources = files(
   'mode-manager.h',
   'mount-manager.c',
   'mount-manager.h',
+  'mount-operation.c',
+  'mount-operation.h',
   'overview.c',
   'overview.h',
   'osd-window.c',

src/mount-operation.c

+/*
+ * Copyright (C) 2021 Purism SPC
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ *
+ * Author: Guido Günther <agx@sigxcpu.org>
+ */
+
+#define G_LOG_DOMAIN "phosh-mount-operation"
+
+#include "config.h"
+
+#include "gtk-mount-prompt.h"
+#include "mount-operation.h"
+#include "util.h"
+
+/**
+ * SECTION:mount-operation
+ * @short_description: #GMountOperation using UI
+ * @Title: PhoshMountOperation
+ *
+ * A #GMountOperation that uses system modal dialogs for input.
+ */
+
+struct _PhoshMountOperation {
+  GMountOperation      parent;
+
+  PhoshGtkMountPrompt *prompt;
+};
+G_DEFINE_TYPE (PhoshMountOperation, phosh_mount_operation, G_TYPE_MOUNT_OPERATION)
+
+
+static void
+on_prompt_done (PhoshMountOperation *self, PhoshGtkMountPrompt *prompt)
+{
+  gboolean cancelled;
+  GMountOperationResult result = G_MOUNT_OPERATION_ABORTED;
+
+  g_return_if_fail (PHOSH_IS_MOUNT_OPERATION (self));
+  g_return_if_fail (PHOSH_IS_GTK_MOUNT_PROMPT (prompt));
+
+  cancelled = phosh_gtk_mount_prompt_get_cancelled (prompt);
+  g_debug ("Prompt done, cancelled: %d", cancelled);
+
+  if (!cancelled) {
+    GAskPasswordFlags flags = phosh_gtk_mount_prompt_get_ask_flags (prompt);
+
+    if (flags & G_ASK_PASSWORD_NEED_PASSWORD) {
+      const char *password;
+
+      password = phosh_gtk_mount_prompt_get_password (prompt);
+      g_mount_operation_set_password (G_MOUNT_OPERATION (self), password);
+      result = G_MOUNT_OPERATION_HANDLED;
+    }
+  }
+
+  g_mount_operation_reply (G_MOUNT_OPERATION (self), result);
+  g_clear_pointer (&self->prompt, phosh_cp_widget_destroy);
+}
+
+
+static void
+new_prompt (PhoshMountOperation *self,
+            const char          *message,
+            const char          *icon_name,
+            const char          *default_user,
+            const char          *default_domain,
+            GVariant            *pids,
+            const char *const   *choices,
+            GAskPasswordFlags    ask_flags)
+{
+  g_debug ("New prompt for '%s'", message);
+
+  g_clear_pointer (&self->prompt, phosh_cp_widget_destroy);
+
+  self->prompt = PHOSH_GTK_MOUNT_PROMPT (phosh_gtk_mount_prompt_new (
+                                           message,
+                                           icon_name,
+                                           default_user,
+                                           default_domain,
+                                           pids,
+                                           choices,
+                                           ask_flags));
+  g_signal_connect_swapped (self->prompt,
+                            "closed",
+                            G_CALLBACK (on_prompt_done),
+                            self);
+
+  gtk_widget_show (GTK_WIDGET (self->prompt));
+}
+
+
+static void
+phosh_mount_operation_ask_password (GMountOperation  *op,
+                                    const char       *message,
+                                    const char       *default_user,
+                                    const char       *default_domain,
+                                    GAskPasswordFlags flags)
+{
+  PhoshMountOperation *self = PHOSH_MOUNT_OPERATION (op);
+
+  new_prompt (self, message,
+              NULL,             /* icon */
+              default_user,
+              default_domain,
+              NULL,             /* default_user */
+              NULL,             /* choices */
+              flags);
+}
+
+
+static void
+phosh_mount_operation_dispose (GObject *object)
+{
+  PhoshMountOperation *self = PHOSH_MOUNT_OPERATION (object);
+
+  g_clear_pointer (&self->prompt, phosh_cp_widget_destroy);
+
+  G_OBJECT_CLASS (phosh_mount_operation_parent_class)->dispose (object);
+}
+
+
+static void
+phosh_mount_operation_class_init (PhoshMountOperationClass *klass)
+{
+  GMountOperationClass *mount_op_class = G_MOUNT_OPERATION_CLASS (klass);
+  GObjectClass *object_class = G_OBJECT_CLASS (klass);
+
+  object_class->dispose = phosh_mount_operation_dispose;
+
+  mount_op_class->ask_password = phosh_mount_operation_ask_password;
+}
+
+
+static void
+phosh_mount_operation_init (PhoshMountOperation *self)
+{
+}
+
+
+PhoshMountOperation *
+phosh_mount_operation_new (void)
+{
+  return PHOSH_MOUNT_OPERATION (g_object_new (PHOSH_TYPE_MOUNT_OPERATION, NULL));
+}

src/mount-operation.h

+/*
+ * Copyright (C) 2021 Purism SPC
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+#pragma once
+
+#include <gio/gio.h>
+
+G_BEGIN_DECLS
+
+#define PHOSH_TYPE_MOUNT_OPERATION (phosh_mount_operation_get_type ())
+
+G_DECLARE_FINAL_TYPE (PhoshMountOperation, phosh_mount_operation, PHOSH, MOUNT_OPERATION, GMountOperation)
+
+PhoshMountOperation *phosh_mount_operation_new (void);
+
+G_END_DECLS