Merge pull request #1568 from profanity-im/feature/1320-omemo-qrcode

Show OMEMO QR Code

2 files changed, 51 insertions, 0 deletions

diff --git a/src/ui/console.c b/src/ui/console.c
index 3e7a0844..32575a15 100644
--- a/src/ui/console.c
+++ b/src/ui/console.c
@@ -48,6 +48,10 @@
 #include <curses.h>
 #endif
 
+#ifdef HAVE_QRENCODE
+#include <qrencode.h>
+#endif
+
 #include "common.h"
 #include "log.h"
 #include "config/preferences.h"
@@ -863,6 +867,49 @@ cons_show_disco_contact_information(GHashTable* addresses)
 }
 
 void
+cons_show_omemo_qrcode(const char* const text)
+{
+#ifdef HAVE_QRENCODE
+    static const size_t ZOOM_SIZE = 10;
+    QRcode* qrcode = QRcode_encodeString(text, 0, QR_ECLEVEL_L, QR_MODE_8, 1);
+
+    int width = (qrcode->width * ZOOM_SIZE);
+    unsigned char* data = qrcode->data;
+
+    ProfWin* console = wins_get_console();
+
+    char buf[(width * 4) + 1];
+    memset(buf, 0, sizeof buf);
+
+    char tmp[(width * 4) + 5];
+    memset(tmp, 0, sizeof tmp);
+
+    for (int i = 0; i < width + 2 * ZOOM_SIZE; i += ZOOM_SIZE) {
+        strcat(tmp, "\u2588\u2588");
+    }
+
+    win_println(console, THEME_DEFAULT, "", tmp);
+    for (size_t y = 0; y < width; y += ZOOM_SIZE) {
+        for (size_t x = 0; x < width; x += ZOOM_SIZE) {
+            strcat(buf, !(*data & 1) ? "\u2588\u2588" : "\u2800\u2800");
+
+            data++;
+        }
+
+        // The extra squares are for padding, so that the QR code doesn't
+        // "blend in" with the rest of the terminal window.
+        win_println(console, THEME_DEFAULT, "", "\u2588\u2588%s\u2588\u2588", buf);
+        memset(buf, 0, sizeof buf);
+    }
+    win_println(console, THEME_DEFAULT, "", "%s", tmp);
+
+    QRcode_free(qrcode);
+#else
+    cons_show("This version of Profanity has not been built with libqrencode");
+#endif
+}
+
+void
 cons_show_status(const char* const barejid)
 {
     ProfWin* console = wins_get_console();
diff --git a/src/ui/ui.h b/src/ui/ui.h
index 5f31354f..8615045a 100644
--- a/src/ui/ui.h
+++ b/src/ui/ui.h
@@ -277,7 +277,11 @@ void cons_show_bookmarks(const GList* list);
 void cons_show_bookmarks_ignore(gchar** list, gsize len);
 void cons_show_disco_items(GSList* items, const char* const jid);
 void cons_show_disco_info(const char* from, GSList* identities, GSList* features);
+
 void cons_show_disco_contact_information(GHashTable* addresses);
+
+void cons_show_omemo_qrcode(const char* const text);
+
 void cons_show_room_invite(const char* const invitor, const char* const room, const char* const reason);
 void cons_check_version(gboolean not_available_msg);
 void cons_show_typing(const char* const barejid);