Initial revision

src/file.c

@@ -0,0 +1,203 @@
+// SPDX-FileCopyrightText: 2022 Geoffrey D. Bennett <g@b4.vu>
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#include "alsa.h"
+#include "alsa-sim.h"
+#include "error.h"
+#include "file.h"
+#include "stringhelper.h"
+
+static void run_alsactl(
+  struct alsa_card *card,
+  char             *cmd,
+  char             *fn
+) {
+  GtkWindow *w = GTK_WINDOW(card->window_main);
+
+  gchar *argv[] = {
+    "alsactl", cmd, card->device, "-f", fn, NULL
+  };
+  gchar  *stdout;
+  gchar  *stderr;
+  gint    exit_status;
+  GError *error = NULL;
+
+  gboolean result = g_spawn_sync(
+    NULL,
+    argv,
+    NULL,
+    G_SPAWN_SEARCH_PATH,
+    NULL,
+    NULL,
+    &stdout,
+    &stderr,
+    &exit_status,
+    &error
+  );
+
+  if (result && WIFEXITED(exit_status) && WEXITSTATUS(exit_status) == 0)
+    goto done;
+
+  char *error_message =
+    result
+      ? g_strdup_printf("%s\n%s", stdout, stderr)
+      : g_strdup_printf("%s", error->message);
+
+  char *msg = g_strdup_printf(
+    "Error running “alsactl %s %s -f %s”: %s",
+    cmd, card->device, fn, error_message
+    );
+  show_error(w, msg);
+  g_free(msg);
+  g_free(error_message);
+
+done:
+  g_free(stdout);
+  g_free(stderr);
+  if (error)
+    g_error_free(error);
+}
+
+static void add_state_filter(GtkFileChooserNative *native) {
+  GtkFileFilter *filter = gtk_file_filter_new();
+  gtk_file_filter_set_name(filter, "alsactl state file (.state)");
+  gtk_file_filter_add_pattern(filter, "*.state");
+  gtk_file_chooser_add_filter(GTK_FILE_CHOOSER(native), filter);
+}
+
+static void load_response(
+  GtkNativeDialog *native,
+  int              response,
+  gpointer         data
+) {
+  struct alsa_card *card = data;
+
+  if (response != GTK_RESPONSE_ACCEPT)
+    goto done;
+
+  GFile *file = gtk_file_chooser_get_file(GTK_FILE_CHOOSER(native));
+  char *fn = g_file_get_path(file);
+
+  run_alsactl(card, "restore", fn);
+
+  g_free(fn);
+  g_object_unref(file);
+
+done:
+  g_object_unref(native);
+}
+
+void activate_load(
+  GSimpleAction *action,
+  GVariant      *parameter,
+  gpointer       data
+) {
+  struct alsa_card *card = data;
+
+  GtkFileChooserNative *native = gtk_file_chooser_native_new(
+    "Load Configuration",
+    GTK_WINDOW(card->window_main),
+    GTK_FILE_CHOOSER_ACTION_OPEN,
+    "_Load",
+    "_Cancel"
+  );
+
+  add_state_filter(native);
+
+  g_signal_connect(native, "response", G_CALLBACK(load_response), card);
+  gtk_native_dialog_show(GTK_NATIVE_DIALOG(native));
+}
+
+static void save_response(
+  GtkNativeDialog *native,
+  int              response,
+  gpointer         data
+) {
+  struct alsa_card *card = data;
+
+  if (response != GTK_RESPONSE_ACCEPT)
+    goto done;
+
+  GFile *file = gtk_file_chooser_get_file(GTK_FILE_CHOOSER(native));
+  char *fn = g_file_get_path(file);
+
+  // append .state if not present
+  char *fn_with_ext;
+  if (string_ends_with(fn, ".state"))
+    fn_with_ext = g_strdup_printf("%s", fn);
+  else
+    fn_with_ext = g_strdup_printf("%s.state", fn);
+
+  run_alsactl(card, "store", fn_with_ext);
+
+  g_free(fn);
+  g_free(fn_with_ext);
+  g_object_unref(file);
+
+done:
+  g_object_unref(native);
+}
+
+void activate_save(
+  GSimpleAction *action,
+  GVariant      *parameter,
+  gpointer       data
+) {
+  struct alsa_card *card = data;
+
+  GtkFileChooserNative *native = gtk_file_chooser_native_new(
+    "Save Configuration",
+    GTK_WINDOW(card->window_main),
+    GTK_FILE_CHOOSER_ACTION_SAVE,
+    "_Save",
+    "_Cancel"
+  );
+
+  add_state_filter(native);
+
+  g_signal_connect(native, "response", G_CALLBACK(save_response), card);
+  gtk_native_dialog_show(GTK_NATIVE_DIALOG(native));
+}
+
+static void sim_response(
+  GtkNativeDialog *native,
+  int              response,
+  gpointer         data
+) {
+  GtkWindow *w = data;
+
+  if (response != GTK_RESPONSE_ACCEPT)
+    goto done;
+
+  GFile *file = gtk_file_chooser_get_file(GTK_FILE_CHOOSER(native));
+  char *fn = g_file_get_path(file);
+
+  create_sim_from_file(w, fn);
+
+  g_free(fn);
+  g_object_unref(file);
+
+done:
+  g_object_unref(native);
+}
+
+void activate_sim(
+  GSimpleAction *action,
+  GVariant      *parameter,
+  gpointer       data
+) {
+  GtkWidget *w = data;
+
+  GtkFileChooserNative *native = gtk_file_chooser_native_new(
+    "Load Configuration File for Interface Simulation",
+    GTK_WINDOW(w),
+    GTK_FILE_CHOOSER_ACTION_OPEN,
+    "_Load",
+    "_Cancel"
+  );
+
+  add_state_filter(native);
+
+  g_signal_connect(native, "response", G_CALLBACK(sim_response), w);
+  gtk_native_dialog_show(GTK_NATIVE_DIALOG(native));
+}