[PATCH 6/7] [Kernel32]: in console edition mode, speed up update of edited line when appending characters

[Eric Pouech]

A+
---

 dlls/kernel32/editline.c |   39 ++++++++++++++++++++++++---------------
 1 file changed, 24 insertions(+), 15 deletions(-)


diff --git a/dlls/kernel32/editline.c b/dlls/kernel32/editline.c
index 2a69f86..c9465ff 100644
--- a/dlls/kernel32/editline.c
+++ b/dlls/kernel32/editline.c
@@ -1002,23 +1002,32 @@ WCHAR* CONSOLE_Readline(HANDLE hConsoleIn)
         }
         else if (!ctx.done && !ctx.error)
         {
-            DWORD last;
-            /* erase previous chars */
-            WCEL_WriteNChars(&ctx, '\b', ctx.last_rub);
-
-            /* write chars up to cursor */
-            ctx.last_rub = WCEL_WriteConsole(&ctx, 0, ctx.ofs);
-            /* write chars past cursor */
-            last = ctx.last_rub + WCEL_WriteConsole(&ctx, ctx.ofs, ctx.len - ctx.ofs);
-            if (last < ctx.last_max) /* ctx.line has been shortened, erase */
+            /* if we've just appended a last character, simply do it */
+            if (ctx.ofs && ctx.ofs == ctx.len && !func && !(ir.Event.KeyEvent.dwControlKeyState & LEFT_ALT_PRESSED))
             {
-                WCEL_WriteNChars(&ctx, ' ', ctx.last_max - last);
-                WCEL_WriteNChars(&ctx, '\b', ctx.last_max - last);
-                ctx.last_max = last;
+                ctx.last_rub += WCEL_WriteConsole(&ctx, ctx.ofs - 1, 1);
+                ctx.last_max = ctx.last_rub;
+            }
+            else
+            {
+                DWORD last;
+                /* erase previous chars */
+                WCEL_WriteNChars(&ctx, '\b', ctx.last_rub);
+
+                /* write chars up to cursor */
+                ctx.last_rub = WCEL_WriteConsole(&ctx, 0, ctx.ofs);
+                /* write chars past cursor */
+                last = ctx.last_rub + WCEL_WriteConsole(&ctx, ctx.ofs, ctx.len - ctx.ofs);
+                if (last < ctx.last_max) /* ctx.line has been shortened, erase */
+                {
+                    WCEL_WriteNChars(&ctx, ' ', ctx.last_max - last);
+                    WCEL_WriteNChars(&ctx, '\b', ctx.last_max - last);
+                    ctx.last_max = last;
+                }
+                else ctx.last_max = last;
+                /* reposition at cursor */
+                WCEL_WriteNChars(&ctx, '\b', last - ctx.last_rub);
             }
-            else ctx.last_max = last;
-            /* reposition at cursor */
-            WCEL_WriteNChars(&ctx, '\b', last - ctx.last_rub);
         }
     }
     if (ctx.error)