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Remove gtk_dialog_run() from GtkPrintUnixDialog

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Replace it with an explicit nested main loop, as we need to block the
signal handler currently being emitted depending on the response of the
overwrite confirmation dialog.

This is a bit of a hack, and the only reason we need it is that the
print dialog will load the last used path as the output file name, when
printing to a file; this means that, in theory, it would be possible to
press Print without selecting a file, and accidentally overwriting an
existing file.

It would be much simpler if we did not store the last used path, and
always explicitly asked the user to select a file; this would avoid
destructive actions, and would allow us to rely on the overwrite
confirmation dialog right inside the file chooser.
This commit is contained in:
Emmanuele Bassi 2020-04-30 18:45:01 +01:00
parent b8988be4b5
commit 0a6848d70b
1 changed files with 49 additions and 25 deletions
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74
gtk/gtkprintunixdialog.c
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@ -150,7 +150,7 @@ static void printer_status_cb (GtkPrintBackend *backend,
GtkPrintUnixDialog *dialog);
static void update_collate_icon (GtkToggleButton *toggle_button,
GtkPrintUnixDialog *dialog);
static gboolean error_dialogs (GtkPrintUnixDialog *print_dialog,
static void error_dialogs (GtkPrintUnixDialog *print_dialog,
gint print_dialog_response_id,
gpointer data);
static void emit_ok_response (GtkTreeView *tree_view,
@ -604,31 +604,42 @@ set_busy_cursor (GtkPrintUnixDialog *dialog,
gtk_widget_set_cursor (widget, NULL);
}
typedef struct {
GMainLoop *loop;
int response;
} ConfirmationData;
static void
on_confirmation_dialog_response (GtkWidget *dialog,
int response,
gpointer user_data)
{
ConfirmationData *data = user_data;
data->response = response;
g_main_loop_quit (data->loop);
gtk_window_destroy (GTK_WINDOW (dialog));
}
/* This function handles error messages before printing.
*/
static gboolean
static void
error_dialogs (GtkPrintUnixDialog *dialog,
gint dialog_response_id,
gpointer data)
{
GtkPrinterOption *option = NULL;
GtkPrinter *printer = NULL;
GtkWindow *toplevel = NULL;
GFile *file = NULL;
gchar *basename = NULL;
gchar *dirname = NULL;
int response;
if (dialog != NULL && dialog_response_id == GTK_RESPONSE_OK)
{
printer = gtk_print_unix_dialog_get_selected_printer (dialog);
GtkPrinter *printer = gtk_print_unix_dialog_get_selected_printer (dialog);
if (printer != NULL)
{
if (dialog->request_details_tag || !gtk_printer_is_accepting_jobs (printer))
{
g_signal_stop_emission_by_name (dialog, "response");
return TRUE;
return;
}
/* Shows overwrite confirmation dialog in the case of printing
@ -636,18 +647,22 @@ error_dialogs (GtkPrintUnixDialog *dialog,
*/
if (gtk_printer_is_virtual (printer))
{
option = gtk_printer_option_set_lookup (dialog->options,
"gtk-main-page-custom-input");
GtkPrinterOption *option =
gtk_printer_option_set_lookup (dialog->options,
"gtk-main-page-custom-input");
if (option != NULL &&
option->type == GTK_PRINTER_OPTION_TYPE_FILESAVE)
{
file = g_file_new_for_uri (option->value);
GFile *file = g_file_new_for_uri (option->value);
if (g_file_query_exists (file, NULL))
{
GFile *parent;
GtkWidget *message_dialog;
GtkWindow *toplevel;
char *basename;
char *dirname;
GFile *parent;
toplevel = get_toplevel (GTK_WIDGET (dialog));
@ -682,19 +697,29 @@ error_dialogs (GtkPrintUnixDialog *dialog,
gtk_window_group_add_window (gtk_window_get_group (toplevel),
GTK_WINDOW (message_dialog));
response = gtk_dialog_run (GTK_DIALOG (message_dialog));
gtk_window_present (GTK_WINDOW (message_dialog));
gtk_window_destroy (GTK_WINDOW (message_dialog));
/* Block on the confirmation dialog until we have a response,
* so that we can stop the "response" signal emission on the
* print dialog
*/
ConfirmationData cdata;
cdata.loop = g_main_loop_new (NULL, FALSE);
cdata.response = 0;
g_signal_connect (message_dialog, "response",
G_CALLBACK (on_confirmation_dialog_response),
&cdata);
g_main_loop_run (cdata.loop);
g_main_loop_unref (cdata.loop);
g_free (dirname);
g_free (basename);
if (response != GTK_RESPONSE_ACCEPT)
{
g_signal_stop_emission_by_name (dialog, "response");
g_object_unref (file);
return TRUE;
}
if (cdata.response != GTK_RESPONSE_ACCEPT)
g_signal_stop_emission_by_name (dialog, "response");
}
g_object_unref (file);
@ -702,7 +727,6 @@ error_dialogs (GtkPrintUnixDialog *dialog,
}
}
}
return FALSE;
}
static void