[ghex/gtk4-port: 71/91] paste-special: Add error dialog

[Logan Rathbone <larathbone src gnome org>]

commit eee9a2555223edd74e1259c6b72df90f721089c6
Author: Logan Rathbone <poprocks gmail com>
Date:   Tue Feb 2 10:16:48 2021 -0500

    paste-special: Add error dialog

 src/paste-special.c | 29 +++++++++++++++++++++++++----
 src/paste-special.h |  1 +
 2 files changed, 26 insertions(+), 4 deletions(-)
---
diff --git a/src/paste-special.c b/src/paste-special.c
index dd754f42..3fa7aa5d 100644
--- a/src/paste-special.c
+++ b/src/paste-special.c
@@ -36,12 +36,21 @@
        g_assert (GTK_IS_WIDGET (X))
 
 /* ENUMS AND DATATYPES */
+
+#define HEX_PASTE_ERROR hex_paste_error_quark ()
+G_DEFINE_QUARK (hex-paste-error-quark, hex_paste_error)
+
+typedef enum {
+       HEX_PASTE_ERROR_INVALID
+
+} HexPasteError;
+
 enum mime_types {
        NO_MIME,
        PLAINTEXT_MIME,
        UTF_PLAINTEXT_MIME,
        LAST_MIME
-} MimeType;
+};
 
 typedef enum {
        NO_SUBTYPE,
@@ -135,7 +144,7 @@ mime_sub_type_label_new (KnownMimeType *known_type)
 /* PRIVATE FUNCTIONS */
 
 static GString *
-delimited_hex_to_gstring (const char *hex_str)
+delimited_hex_to_gstring (const char *hex_str, GError **err)
 {
        char *copy;
        char *cp;
@@ -169,6 +178,13 @@ delimited_hex_to_gstring (const char *hex_str)
 
 fail:
        g_debug ("%s: Invalid hex format detected", __func__);
+       g_set_error (err,
+                       HEX_PASTE_ERROR,
+                       HEX_PASTE_ERROR_INVALID,
+                       "Paste failed; invalid hex format.\n\n"
+                       "The string must be in the format of space-delineated "
+                       "hex byte pairs.\n\n"
+                       "For example: \"FF 3D 99 0A\"");
        g_free (copy);
        return NULL;
 }
@@ -182,17 +198,22 @@ delimited_paste_received_cb (GObject *source_object,
        HexDocument *doc;
        char *text;
        GString *buf = NULL;
+       GError *err = NULL; 
 
        /* Get the resulting text of the read operation */
        text = gdk_clipboard_read_text_finish (GDK_CLIPBOARD(source_object),
                        result,
                        NULL);  /* GError */
 
-       buf = delimited_hex_to_gstring (text);
+       buf = delimited_hex_to_gstring (text, &err);
        if (! buf)
        {
                g_debug ("%s: Received invalid delimeter string. Returning.",
                                __func__);
+               if (err) {
+                       display_error_dialog (GTK_WINDOW(app_window), err->message);
+                       g_error_free (err);
+               }
                return;
        }
 
@@ -417,7 +438,7 @@ init_mime_hash (void)
                                ASCII_PLAINTEXT));
 
        LIST = g_slist_append (LIST, create_known_mime_sub_type (MIME,
-                               _("Plain text (as delimited hex pairs)"),
+                               _("Plain text (as space-delimited hex pairs)"),
                                HEX_PLAINTEXT));
 
        g_hash_table_insert (mime_hash,
diff --git a/src/paste-special.h b/src/paste-special.h
index 4c2d6573..d27811c4 100644
--- a/src/paste-special.h
+++ b/src/paste-special.h
@@ -32,6 +32,7 @@
 #include "gtkhex.h"
 #include "gtkhex-paste-data.h"
 #include "ghex-application-window.h"
+#include "common-ui.h"
 
 G_BEGIN_DECLS