2 files changed, 27 insertions, 4 deletions

diff --git a/chatty.c b/chatty.c
index 233e8b3..6631ebf 100644
--- a/chatty.c
+++ b/chatty.c
@@ -19,6 +19,8 @@
 #define LOGFILE "chatty.log"
 // enable logging
 #define LOGGING
+// Number of spaces inserted when pressing Tab/Ctrl+I
+#define TAB_WIDTH 4
 
 #define DEBUG
 
@@ -761,12 +763,25 @@ main(int argc, char** argv)
                 }
 
             } break;
+            case TB_KEY_CTRL_I:
+            {
+                for (u32 i = 0;
+                    i < TAB_WIDTH && InputLen < INPUT_LIMIT - 1;
+                    i++)
+                {
+                    Input[InputLen] = L' ';
+                    InputLen++;
+                }
+            } break;
             case TB_KEY_CTRL_D:
             case TB_KEY_CTRL_C:
                 quit = 1;
                 break;
             case TB_KEY_CTRL_M: // send message
-                if (InputLen == 0)
+            {
+                raw_result RawText = markdown_to_raw(0, Input, InputLen);
+
+                if (RawText.Len == 0)
                     // do not send empty message
                     break;
                 if (fds[FDS_UNI].fd == -1)
@@ -796,6 +811,7 @@ main(int argc, char** argv)
 
                 MessagesNum++;
                 // also clear input
+            } // fallthrough
             case TB_KEY_CTRL_U: // clear input
                 bzero(Input, InputLen * sizeof(*Input));
                 InputLen = 0;
diff --git a/ui.c b/ui.c
index ed2aa24..c2e0ac9 100644
--- a/ui.c
+++ b/ui.c
@@ -207,20 +207,27 @@ tb_print_wrapped_with_markdown(u32 XOffset, u32 YOffset, u32 fg, u32 bg,
 
 // Return string without markdown markup characters using `is_markdown()`
 // ScratchArena is used to allocate space for the raw text
+// If ScratchArena is null then it will only return then length of the raw string
 // Len should be characters + null terminator
 // Copies the null terminator as well
 raw_result
 markdown_to_raw(Arena* ScratchArena, u32* Text, u32 Len)
 {
     raw_result Result = {0};
-    Result.Text = ScratchArena->addr;
+    if (ScratchArena)
+    {
+        Result.Text = ScratchArena->addr;
+    }
 
     for (u32 i = 0; i < Len; i++)
     {
         if (!is_markdown(Text[i]))
         {
-            u32* ch = ArenaPush(ScratchArena, sizeof(*ch));
-            *ch = Text[i];
+            if (ScratchArena)
+            {
+                u32* ch = ArenaPush(ScratchArena, sizeof(*ch));
+                *ch = Text[i];
+            }
             Result.Len++;
         }
     }