Merged most of the recent changes from the Wine edit control.
We now pass all of the Wine edit regression tests.

Vitaliy Margolen <wine-patch@kievinfo.com>
- return "want all keys" for WM_GETDLGCODE when multi-line
- single-line edit control does not want all messages
- additional style combinations are possible for both multi-line and
  single-line edit controls
- tests to confirm it

James Hawkins <truiken@gmail.com>
Limit scrolling of the edit control to the last line of text.

Ulrich Czekalla <ulrich@codeweavers.com>
Handle painting the border if WS_EX_CLIENTEDGE is not set.

Ulrich Czekalla <ulrich@codeweavers.com>
Allow copying selection when control is read only.

reactos/lib/user32/controls

diff -u -r1.28 -r1.29
--- edit.c	28 Nov 2004 16:51:18 -0000	1.28
+++ edit.c	18 Dec 2004 16:06:23 -0000	1.29
@@ -824,16 +824,18 @@

 
 	case WM_GETDLGCODE:
 		result = DLGC_HASSETSEL | DLGC_WANTCHARS | DLGC_WANTARROWS;

+		
+		if (es->style & ES_MULTILINE)
+		{
+		   result |= DLGC_WANTALLKEYS;
+		   break;
+		}

 
 		if (lParam && (((LPMSG)lParam)->message == WM_KEYDOWN))
 		{
 		   int vk = (int)((LPMSG)lParam)->wParam;
 

-		   if (vk == VK_RETURN && (GetWindowLongW( hwnd, GWL_STYLE ) & ES_WANTRETURN))
-		   {
-		      result |= DLGC_WANTMESSAGE;
-		   }
-		   else if (es->hwndListBox && (vk == VK_RETURN || vk == VK_ESCAPE))

+		   if (es->hwndListBox && (vk == VK_RETURN || vk == VK_ESCAPE))

 		   {
 		      if (SendMessageW(GetParent(hwnd), CB_GETDROPPEDSTATE, 0, 0))
 		         result |= DLGC_WANTMESSAGE;

@@ -2907,6 +2909,8 @@

 {
 	INT nyoff;
 	INT x_offset_in_pixels;

+	INT lines_per_page = (es->format_rect.bottom - es->format_rect.top) /
+			      es->line_height;

 
 	if (es->style & ES_MULTILINE)
 	{

@@ -2923,8 +2927,8 @@

 	if (dx > es->text_width - x_offset_in_pixels)
 		dx = es->text_width - x_offset_in_pixels;
 	nyoff = max(0, es->y_offset + dy);

-	if (nyoff >= es->line_count)
-		nyoff = es->line_count - 1;

+	if (nyoff >= es->line_count - lines_per_page)
+		nyoff = es->line_count - lines_per_page;

 	dy = (es->y_offset - nyoff) * es->line_height;
 	if (dx || dy) {
 		RECT rc1;

@@ -3742,10 +3746,6 @@

 {
         BOOL control;
 

-	/* Protect read-only edit control from modification */
-	if(es->style & ES_READONLY)
-	    return;
-

 	control = GetKeyState(VK_CONTROL) & 0x8000;
 
 	switch (c) {

@@ -3787,10 +3787,12 @@

 		SendMessageW(es->hwndSelf, WM_COPY, 0, 0);
 		break;
 	case 0x16: /* ^V */

-		SendMessageW(es->hwndSelf, WM_PASTE, 0, 0);

+	        if (!(es->style & ES_READONLY))
+		    SendMessageW(es->hwndSelf, WM_PASTE, 0, 0);

 		break;
 	case 0x18: /* ^X */

-		SendMessageW(es->hwndSelf, WM_CUT, 0, 0);

+	        if (!(es->style & ES_READONLY))
+		    SendMessageW(es->hwndSelf, WM_CUT, 0, 0);

 		break;
 
 	default:

@@ -4553,7 +4555,6 @@

 			if (es->style & ES_RIGHT)
 				es->style &= ~ES_CENTER;
 			es->style &= ~WS_HSCROLL;

-			es->style &= ~ES_AUTOHSCROLL;

 		}
 
 		/* FIXME: for now, all multi line controls are AUTOVSCROLL */

@@ -4564,8 +4565,6 @@

 		es->style &= ~ES_RIGHT;
 		es->style &= ~WS_HSCROLL;
 		es->style &= ~WS_VSCROLL;

-		es->style &= ~ES_AUTOVSCROLL;
-		es->style &= ~ES_WANTRETURN;

 		if (es->style & ES_PASSWORD)
 			es->password_char = '*';
 

@@ -4590,13 +4589,18 @@

 	/*
 	 * In Win95 look and feel, the WS_BORDER style is replaced by the
 	 * WS_EX_CLIENTEDGE style for the edit control. This gives the edit

-	 * control a non client area.  Not always.  This coordinates in some
-         * way with the window creation code in dialog.c  When making
-         * modifications please ensure that the code still works for edit
-         * controls created directly with style 0x50800000, exStyle 0 (
-         * which should have a single pixel border)

+	 * control a nonclient area so we don't need to draw the border.
+         * If WS_BORDER without WS_EX_CLIENTEDGE is specified we shouldn't have
+         * a nonclient area and we should handle painting the border ourselves.
+         *
+         * When making modifications please ensure that the code still works 
+         * for edit controls created directly with style 0x50800000, exStyle 0
+         * (which should have a single pixel border)

 	 */

-	es->style      &= ~WS_BORDER;

+	if (lpcs->dwExStyle & WS_EX_CLIENTEDGE)
+		es->style &= ~WS_BORDER;
+        else if (es->style & WS_BORDER)
+		SetWindowLongW(hwnd, GWL_STYLE, es->style & ~WS_BORDER);

 
 	return TRUE;
 }