Add basic qrcode functions

configure.ac

@@ -67,6 +67,8 @@ AC_ARG_ENABLE([icons-and-clipboard],
     [AS_HELP_STRING([--enable-icons-and-clipboard], [enable GTK tray icons and clipboard paste support])])
 AC_ARG_ENABLE([gdk-pixbuf],
     [AS_HELP_STRING([--enable-gdk-pixbuf], [enable GDK Pixbuf support to scale avatars before uploading])])
+AC_ARG_ENABLE([omemo-qrcode],
+    [AS_HELP_STRING([--enable-omemo-qrcode], [enable ability to display omemo qr code])])
 
 # Required dependencies
 
@@ -345,6 +347,12 @@ AS_IF([test "x$with_themes" = xno -o "x$with_themes" = xyes -o "x$with_themes" =
 AC_SUBST(THEMES_PATH)
 AM_CONDITIONAL([THEMES_INSTALL], "$THEMES_INSTALL")
 
+dnl feature: omemo qrcode
+AS_IF([test "x$omemo_qrcode" != xno],
+    [PKG_CHECK_MODULES([libqrencode], [libqrencode],
+        [AC_DEFINE([HAVE_QRENCODE], [1], [qrcode module])]
+        [LIBS="-lqrencode $LIBS"]], []))
+
 ## Tests
 
 # cmocka is required only for tests, profanity shouldn't be linked with it

src/command/cmd_ac.c

@@ -700,6 +700,7 @@ cmd_ac_init(void)
     autocomplete_add(omemo_ac, "policy");
     autocomplete_add(omemo_ac, "trustmode");
     autocomplete_add(omemo_ac, "char");
+    autocomplete_add(omemo_ac, "qrcode");
 
     omemo_log_ac = autocomplete_new();
     autocomplete_add(omemo_log_ac, "on");

src/command/cmd_defs.c

@@ -2312,7 +2312,8 @@ static struct cmd_t command_defs[] = {
             { "fingerprint", cmd_omemo_fingerprint },
             { "char", cmd_omemo_char },
             { "policy", cmd_omemo_policy },
-            { "clear_device_list", cmd_omemo_clear_device_list })
+            { "clear_device_list", cmd_omemo_clear_device_list },
+            { "qrcode", cmd_omemo_qrcode })
         CMD_NOMAINFUNC
         CMD_TAGS(
             CMD_TAG_CHAT,

src/command/cmd_funcs.c

@@ -9035,6 +9035,18 @@ cmd_omemo_policy(ProfWin* window, const char* const command, gchar** args)
 #endif
 }
 
+gboolean
+cmd_omemo_qrcode(ProfWin* window, const char* const command, gchar** args)
+{
+#ifdef HAVE_OMEMO
+    cons_show_omemo_qrcode("some text from me");
+    return TRUE;
+#else
+    cons_show("This version of Profanity has not been built with OMEMO support enabled");
+    return TRUE;
+#endif
+}
+
 gboolean
 cmd_save(ProfWin* window, const char* const command, gchar** args)
 {

src/command/cmd_funcs.h

@@ -227,6 +227,7 @@ gboolean cmd_omemo_untrust(ProfWin* window, const char* const command, gchar** a
 gboolean cmd_omemo_trust_mode(ProfWin* window, const char* const command, gchar** args);
 gboolean cmd_omemo_policy(ProfWin* window, const char* const command, gchar** args);
 gboolean cmd_omemo_clear_device_list(ProfWin* window, const char* const command, gchar** args);
+gboolean cmd_omemo_qrcode(ProfWin* window, const char* const command, gchar** args);
 
 gboolean cmd_save(ProfWin* window, const char* const command, gchar** args);
 gboolean cmd_reload(ProfWin* window, const char* const command, gchar** args);

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"
@@ -862,6 +866,36 @@ 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();
+
+    for (size_t y = 0; y < width; y+=ZOOM_SIZE) {
+        //size_t y_index = y * width;
+        for (size_t x = 0; x < width; x+=ZOOM_SIZE) {
+            if (x==0) {
+                win_print(console, THEME_DEFAULT, "", "%s", (*data & 1) ? "A" : "B");
+            } else {
+                win_append(console, THEME_DEFAULT, "", "%s", (*data & 1) ? "A" : "B");
+            }
+
+            data++;
+        }
+        win_println(console, THEME_DEFAULT, "", "");
+    }
+
+    QRcode_free(qrcode);
+#endif
+}
+
 void
 cons_show_status(const char* const barejid)
 {

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);

tests/unittests/ui/stub_ui.c

@@ -923,27 +923,38 @@ 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_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)
 {
 }
+
 void
 cons_show_incoming_room_message(const char* const nick, const char* const room, const int win_index, gboolean mention, GList* triggers, int unread, ProfWin* const window)
 {
 }
+
 void
 cons_show_incoming_message(const char* const short_from, const int win_index, int unread, ProfWin* const window)
 {