riched20: Implement EM_EXLIMITTEXT, EM_GETLIMITTEXT and tests.

dlls/riched20/caret.c

@@ -383,6 +383,9 @@ void ME_InsertTextFromCursor(ME_TextEditor *editor, int nCursor,
 {
   const WCHAR *pos;
   ME_Cursor *p = NULL;
+  /* FIXME: is this too slow? */
+  /* Didn't affect performance for WM_SETTEXT (around 50sec/30K) */
+  int freeSpace = editor->nTextLimit - ME_GetTextLength(editor);
 
   assert(style);
 
@@ -393,6 +396,7 @@ void ME_InsertTextFromCursor(ME_TextEditor *editor, int nCursor,
   assert(nCursor>=0 && nCursor<editor->nCursors);
   if (len == -1)
     len = lstrlenW(str);
+  len = min(len, freeSpace);
   while (len)
   {
     pos = str;

dlls/riched20/editor.c

@@ -32,7 +32,7 @@
   - EM_DISPLAYBAND
   + EM_EMPTYUNDOBUFFER
   + EM_EXGETSEL
-  - EM_EXLIMITTEXT
+  + EM_EXLIMITTEXT
   + EM_EXLINEFROMCHAR
   + EM_EXSETSEL
   + EM_FINDTEXT (only FR_DOWN flag implemented)
@@ -51,7 +51,7 @@
   - EM_GETIMEOPTIONS 1.0asian
   - EM_GETIMESTATUS
   - EM_GETLANGOPTIONS 2.0
-  - EM_GETLIMITTEXT
+  + EM_GETLIMITTEXT
   + EM_GETLINE
   + EM_GETLINECOUNT   returns number of rows, not of paragraphs
   + EM_GETMODIFY
@@ -232,6 +232,8 @@
 
 #define STACK_SIZE_DEFAULT  100
 #define STACK_SIZE_MAX     1000
+
+#define TEXT_LIMIT_DEFAULT 32767
  
 WINE_DEFAULT_DEBUG_CHANNEL(richedit);
 
@@ -1124,6 +1126,7 @@ ME_TextEditor *ME_MakeEditor(HWND hWnd) {
   ed->bCaretAtEnd = FALSE;
   ed->nEventMask = 0;
   ed->nModifyStep = 0;
+  ed->nTextLimit = TEXT_LIMIT_DEFAULT;
   ed->pUndoStack = ed->pRedoStack = ed->pUndoStackBottom = NULL;
   ed->nUndoStackSize = 0;
   ed->nUndoLimit = STACK_SIZE_DEFAULT;
@@ -1420,7 +1423,6 @@ LRESULT WINAPI RichEditANSIWndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lP
   switch(msg) {
   
   UNSUPPORTED_MSG(EM_DISPLAYBAND)
-  UNSUPPORTED_MSG(EM_EXLIMITTEXT)
   UNSUPPORTED_MSG(EM_FINDWORDBREAK)
   UNSUPPORTED_MSG(EM_FMTLINES)
   UNSUPPORTED_MSG(EM_FORMATRANGE)
@@ -1429,7 +1431,6 @@ LRESULT WINAPI RichEditANSIWndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lP
   UNSUPPORTED_MSG(EM_GETIMECOMPMODE)
   /* UNSUPPORTED_MSG(EM_GETIMESTATUS) missing in Wine headers */
   UNSUPPORTED_MSG(EM_GETLANGOPTIONS)
-  UNSUPPORTED_MSG(EM_GETLIMITTEXT)
   /* UNSUPPORTED_MSG(EM_GETOLEINTERFACE) separate stub */
   UNSUPPORTED_MSG(EM_GETREDONAME)
   UNSUPPORTED_MSG(EM_GETTEXTMODE)
@@ -2194,6 +2195,20 @@ LRESULT WINAPI RichEditANSIWndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lP
     TRACE("EM_LINELENGTH(%d)==%d\n",wParam, nChars);
     return nChars;
   }
+  case EM_EXLIMITTEXT:
+  {
+    if (wParam != 0 || lParam < 0)
+     return 0;
+    if (lParam == 0)
+      editor->nTextLimit = 65536;
+    else
+      editor->nTextLimit = (int) lParam;
+    return 0;
+  }
+  case EM_GETLIMITTEXT:
+  {
+    return editor->nTextLimit;
+  }
   case EM_FINDTEXT:
   {
     FINDTEXTA *ft = (FINDTEXTA *)lParam;

dlls/riched20/editstr.h

@@ -312,6 +312,7 @@ typedef struct tagME_TextEditor
   RECT rcFormat;
   BOOL bRedraw;
   int nInvalidOfs;
+  int nTextLimit;
   EDITWORDBREAKPROCW pfnWordBreak;
   LPRICHEDITOLECALLBACK lpOleCallback;
   /*TEXTMODE variable; contains only one of each of the following options:

dlls/riched20/tests/editor.c

@@ -972,6 +972,96 @@ static void test_EM_SETTEXTEX()
 }
 
 
+static void test_EM_EXLIMITTEXT(void)
+{
+  int i, selBegin, selEnd, len1, len2;
+  int BUFSIZE = 1024;
+  char text[BUFSIZE+1];
+  int textlimit = 0; /* multiple of 100 */
+  HWND hwndRichEdit = new_richedit(NULL);
+  
+  i = SendMessage(hwndRichEdit, EM_GETLIMITTEXT, 0, 0);
+  ok(32767 == i, "EM_EXLIMITTEXT: expected: %d, actual: %d\n", 32767, i); /* default */
+  
+  textlimit = 256000;
+  SendMessage(hwndRichEdit, EM_EXLIMITTEXT, 0, textlimit);
+  i = SendMessage(hwndRichEdit, EM_GETLIMITTEXT, 0, 0);
+  /* set higher */
+  ok(textlimit == i, "EM_EXLIMITTEXT: expected: %d, actual: %d\n", textlimit, i);
+  
+  textlimit = 1000;
+  SendMessage(hwndRichEdit, EM_EXLIMITTEXT, 0, textlimit);
+  i = SendMessage(hwndRichEdit, EM_GETLIMITTEXT, 0, 0);
+  /* set lower */
+  ok(textlimit == i, "EM_EXLIMITTEXT: expected: %d, actual: %d\n", textlimit, i);
+ 
+  SendMessage(hwndRichEdit, EM_EXLIMITTEXT, 0, 0);
+  i = SendMessage(hwndRichEdit, EM_GETLIMITTEXT, 0, 0);
+  /* default for WParam = 0 */
+  ok(65536 == i, "EM_EXLIMITTEXT: expected: %d, actual: %d\n", 65536, i);
+ 
+  textlimit = BUFSIZE;
+  memset(text, 'W', textlimit);
+  text[BUFSIZE] = 0;
+  SendMessage(hwndRichEdit, EM_EXLIMITTEXT, 0, textlimit);
+  /* maxed out text */
+  SendMessage(hwndRichEdit, WM_SETTEXT, 0, (LPARAM) text);
+  
+  SendMessage(hwndRichEdit, EM_SETSEL, 0, -1);  /* select everything */
+  SendMessage(hwndRichEdit, EM_GETSEL, (WPARAM)&selBegin, (LPARAM)&selEnd);
+  len1 = selEnd - selBegin;
+  
+  SendMessage(hwndRichEdit, WM_KEYDOWN, VK_BACK, 1);
+  SendMessage(hwndRichEdit, WM_CHAR, VK_BACK, 1);
+  SendMessage(hwndRichEdit, WM_KEYUP, VK_BACK, 1);
+  SendMessage(hwndRichEdit, EM_SETSEL, 0, -1);
+  SendMessage(hwndRichEdit, EM_GETSEL, (WPARAM)&selBegin, (LPARAM)&selEnd);
+  len2 = selEnd - selBegin;
+  
+  ok(len1 != len2,
+    "EM_EXLIMITTEXT: Change Expected\nOld Length: %d, New Length: %d, Limit: %d\n",
+    len1,len2,i);
+  
+  SendMessage(hwndRichEdit, WM_KEYDOWN, 'A', 1);
+  SendMessage(hwndRichEdit, WM_CHAR, 'A', 1);
+  SendMessage(hwndRichEdit, WM_KEYUP, 'A', 1);
+  SendMessage(hwndRichEdit, EM_SETSEL, 0, -1);
+  SendMessage(hwndRichEdit, EM_GETSEL, (WPARAM)&selBegin, (LPARAM)&selEnd);
+  len1 = selEnd - selBegin;
+  
+  ok(len1 != len2,
+    "EM_EXLIMITTEXT: Change Expected\nOld Length: %d, New Length: %d, Limit: %d\n",
+    len1,len2,i);
+  
+  SendMessage(hwndRichEdit, WM_KEYDOWN, 'A', 1);
+  SendMessage(hwndRichEdit, WM_CHAR, 'A', 1);
+  SendMessage(hwndRichEdit, WM_KEYUP, 'A', 1);  /* full; should be no effect */
+  SendMessage(hwndRichEdit, EM_SETSEL, 0, -1);
+  SendMessage(hwndRichEdit, EM_GETSEL, (WPARAM)&selBegin, (LPARAM)&selEnd);
+  len2 = selEnd - selBegin;
+  
+  ok(len1 == len2, 
+    "EM_EXLIMITTEXT: No Change Expected\nOld Length: %d, New Length: %d, Limit: %d\n",
+    len1,len2,i);
+
+  DestroyWindow(hwndRichEdit);
+}
+
+static void test_EM_GETLIMITTEXT(void)
+{
+  int i;
+  HWND hwndRichEdit = new_richedit(NULL);
+
+  i = SendMessage(hwndRichEdit, EM_GETLIMITTEXT, 0, 0);
+  ok(32767 == i, "expected: %d, actual: %d\n", 32767, i); /* default value */
+
+  SendMessage(hwndRichEdit, EM_EXLIMITTEXT, 0, 50000);
+  i = SendMessage(hwndRichEdit, EM_GETLIMITTEXT, 0, 0);
+  ok(50000 == i, "expected: %d, actual: %d\n", 50000, i);
+
+  DestroyWindow(hwndRichEdit);
+}
+
 START_TEST( editor )
 {
   MSG msg;
@@ -993,6 +1083,8 @@ START_TEST( editor )
   test_EM_SETUNDOLIMIT();
   test_ES_PASSWORD();
   test_EM_SETTEXTEX();
+  test_EM_EXLIMITTEXT();
+  test_EM_GETLIMITTEXT();
 
   /* Set the environment variable WINETEST_RICHED20 to keep windows
    * responsive and open for 30 seconds. This is useful for debugging.