1 files changed, 31 insertions, 0 deletions
diff --git a/src/common/impl/wcwidth.c b/src/common/impl/wcwidth.c
new file mode 100644
index 0000000..4453510
--- /dev/null
+++ b/src/common/impl/wcwidth.c
@@ -0,0 +1,31 @@
+#include "common/wcwidth.h"
+#include "3rdparty/widecharwidth/widechar_width_c.h"
+
+int mk_wcwidth(uint32_t wc) {
+    // // We render U+1F6E1 (🛡) with a width of 2,
+    // // but widechar_width says it has a width of 1 because Unicode classifies it as "neutral".
+    // //
+    // // So we simply decide the width ourselves
+    // if (wc == 0x1F6E1) return 2;
+    //
+    // Well terminals do show it as width 1 after all
+
+    int width = widechar_wcwidth(wc);
+
+    switch (width) {
+        case widechar_ambiguous:
+        case widechar_private_use:
+            return 1;
+        case widechar_widened_in_9:
+            // Our renderer supports Unicode 9
+            return 2;
+        case widechar_nonprint:
+        case widechar_combining:
+        case widechar_unassigned:
+        case widechar_non_character:
+           return 0;
+        default:
+            // Use the width widechar_width gave us.
+            return width;
+    }
+}