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bug#2569: marked as done (Emacs-CVS Win32 MS-IME will lost some input)


From: Emacs bug Tracking System
Subject: bug#2569: marked as done (Emacs-CVS Win32 MS-IME will lost some input)
Date: Wed, 04 Mar 2009 14:00:03 +0000

Your message dated Wed, 04 Mar 2009 21:51:11 +0800
with message-id <address@hidden>
and subject line Re: Emacs-CVS Win32 MS-IME  will lost some input
has caused the Emacs bug report #2569,
regarding Emacs-CVS Win32 MS-IME  will lost some input
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
bug report if necessary, and/or fix the problem forthwith.

(NB: If you are a system administrator and have no idea what this
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-- 
2569: http://emacsbugs.donarmstrong.com/cgi-bin/bugreport.cgi?bug=2569
Emacs Bug Tracking System
Contact address@hidden with problems
--- Begin Message --- Subject: Emacs-CVS Win32 MS-IME will lost some input Date: Thu, 13 Nov 2008 22:02:43 -0800 (PST) User-agent: G2/1.0
Hi

I am using japanese input method .If I input continuously I will lost
some word.
Because Emacs handles  WM_IME_CHAR.When first WM_IME_CHAR arrived  It
read whole string and ignore the other WM_IME_CHAR messages.So it use
a ignore_ime_char flag.

The flag is reseted after a WM_IME_ENDCOMPOSITION message.I think when
I input continuously the IME haven't send some WM_IME_ENDCOMPOSITION
message, Because it has not ENDed.

And the composition window is not followed the cursor.

This is my patch.
------BEGIN-----
Index: src/w32fns.c
===================================================================
RCS file: /sources/emacs/emacs/src/w32fns.c,v
retrieving revision 1.349
diff -U 3 -r1.349 w32fns.c
--- src/w32fns.c        30 Oct 2008 01:27:07 -0000      1.349
+++ src/w32fns.c        14 Nov 2008 05:49:34 -0000
@@ -255,6 +255,9 @@
 typedef HMONITOR (WINAPI * MonitorFromPoint_Proc) (IN POINT pt, IN
DWORD flags);
 typedef BOOL (WINAPI * GetMonitorInfo_Proc)
   (IN HMONITOR monitor, OUT struct MONITOR_INFO* info);
+typedef HWND (WINAPI * ImmReleaseContext_Proc) (IN HWND hWnd, IN HIMC
himc);
+typedef HWND (WINAPI * ImmSetCompositionWindow_Proc)
+  (IN HIMC himc, IN LPCOMPOSITIONFORM compform);

 TrackMouseEvent_Proc track_mouse_event_fn = NULL;
 ClipboardSequence_Proc clipboard_sequence_fn = NULL;
@@ -262,11 +265,11 @@
 ImmGetContext_Proc get_ime_context_fn = NULL;
 MonitorFromPoint_Proc monitor_from_point_fn = NULL;
 GetMonitorInfo_Proc get_monitor_info_fn = NULL;
+ImmReleaseContext_Proc release_ime_context_fn = NULL;
+ImmSetCompositionWindow_Proc set_ime_composition_window_fn = NULL;

 extern AppendMenuW_Proc unicode_append_menu;

-/* Flag to selectively ignore WM_IME_CHAR messages.  */
-static int ignore_ime_char = 0;

 /* W95 mousewheel handler */
 unsigned int msh_mousewheel = 0;
@@ -3134,15 +3137,14 @@
       }
       break;

-    case WM_IME_CHAR:
+    case WM_IME_COMPOSITION:
       /* If we can't get the IME result as unicode, use default
processing,
          which will at least allow characters decodable in the system
locale
          get through.  */
       if (!get_composition_string_fn)
         goto dflt;
-
-      else if (!ignore_ime_char)
-        {
+         if (lParam & GCS_RESULTSTR)
+               {
           wchar_t * buffer;
           int size, i;
           W32Msg wmsg;
@@ -3159,14 +3161,47 @@
               my_post_msg (&wmsg, hwnd, WM_UNICHAR, (WPARAM) buffer
[i],
                            lParam);
             }
-          /* We output the whole string above, so ignore following
ones
-             until we are notified of the end of composition.  */
-          ignore_ime_char = 1;
+                 release_ime_context_fn (hwnd, context);
         }
+         else
+               {
+                 goto dflt;
+               }
       break;
-
+       case WM_IME_STARTCOMPOSITION:
+      if (!set_ime_composition_window_fn)
+        goto dflt;
+         HIMC context = get_ime_context_fn (hwnd);
+         if (!context)
+               {
+                 break;
+               }
+         f = x_window_to_frame (dpyinfo, hwnd);
+         COMPOSITIONFORM compform;
+         struct window *w = XWINDOW (FRAME_SELECTED_WINDOW (f));
+         compform.dwStyle = CFS_RECT;
+         compform.ptCurrentPos.x =     WINDOW_TEXT_TO_FRAME_PIXEL_X (w, w-
>phys_cursor.x);
+
+         compform.ptCurrentPos.y = WINDOW_TO_FRAME_PIXEL_Y (w, w-
>phys_cursor.y);
+
+         compform.rcArea.left = (WINDOW_BOX_LEFT_EDGE_X (w)
+                                                         + 
WINDOW_LEFT_MARGIN_WIDTH (w)
+                                                         + 
WINDOW_LEFT_FRINGE_WIDTH (w));
+
+         compform.rcArea.top = (WINDOW_TOP_EDGE_Y (w)
+                                                        + 
WINDOW_HEADER_LINE_HEIGHT (w));
+
+         compform.rcArea.right = (WINDOW_BOX_RIGHT_EDGE_X (w)
+                                                          - 
WINDOW_RIGHT_MARGIN_WIDTH (w)
+                                                          - 
WINDOW_RIGHT_FRINGE_WIDTH (w));
+
+         compform.rcArea.bottom = (WINDOW_BOTTOM_EDGE_Y (w)
+                                                               - 
WINDOW_MODE_LINE_HEIGHT (w));
+         set_ime_composition_window_fn(context, &compform);
+         release_ime_context_fn (hwnd, context);
+
+         break;
     case WM_IME_ENDCOMPOSITION:
-      ignore_ime_char = 0;
       goto dflt;

       /* Simulate middle mouse button events when left and right
buttons
@@ -7258,6 +7293,10 @@
       GetProcAddress (imm32_lib, "ImmGetCompositionStringW");
     get_ime_context_fn = (ImmGetContext_Proc)
       GetProcAddress (imm32_lib, "ImmGetContext");
+       release_ime_context_fn = (ImmReleaseContext_Proc)
+         GetProcAddress (imm32_lib, "ImmReleaseContext");
+       set_ime_composition_window_fn = (ImmSetCompositionWindow_Proc)
+         GetProcAddress (imm32_lib, "ImmSetCompositionWindow");
   }
   DEFVAR_INT ("w32-ansi-code-page",
              &w32_ansi_code_page,
Index: src/w32term.c
===================================================================
RCS file: /sources/emacs/emacs/src/w32term.c,v
retrieving revision 1.309
diff -U 3 -r1.309 w32term.c
--- src/w32term.c       12 Nov 2008 15:51:11 -0000      1.309
+++ src/w32term.c       14 Nov 2008 05:53:00 -0000
@@ -33,6 +33,7 @@
 #include <errno.h>
 #include <setjmp.h>
 #include <sys/stat.h>
+#include <imm.h>

 #include "charset.h"
 #include "character.h"
@@ -5061,7 +5062,11 @@
        {
          struct frame *f = XFRAME (WINDOW_FRAME (w));
          HWND hwnd = FRAME_W32_WINDOW (f);
-
+         if (f == FRAME_W32_DISPLAY_INFO (f)->x_highlight_frame)
+               {
+                 PostMessage (hwnd,
+                                          WM_IME_STARTCOMPOSITION, 0, 0);
+               }
          w32_system_caret_x
            = WINDOW_TEXT_TO_FRAME_PIXEL_X (w, w->phys_cursor.x);
          w32_system_caret_y
------END--------




--- End Message ---
--- Begin Message --- Subject: Re: Emacs-CVS Win32 MS-IME will lost some input Date: Wed, 04 Mar 2009 21:51:11 +0800 User-agent: Thunderbird 2.0.0.19 (Windows/20081209)
Yao wrote:
Hi

I am using japanese input method .If I input continuously I will lost
some word.
Because Emacs handles  WM_IME_CHAR.When first WM_IME_CHAR arrived  It
read whole string and ignore the other WM_IME_CHAR messages.So it use
a ignore_ime_char flag.

The flag is reseted after a WM_IME_ENDCOMPOSITION message.I think when
I input continuously the IME haven't send some WM_IME_ENDCOMPOSITION
message, Because it has not ENDed.

And the composition window is not followed the cursor.

Thank you for your analysis and patch. I found a simpler patch that fixes the bug, and installed that for now. But it seems that your patch also improves the way the composition phase appears to the user, so I would like to revisit this after the 23.1 release.




--- End Message ---

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