2 * RichEdit - string operations
4 * Copyright 2004 by Krzysztof Foltman
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
23 WINE_DEFAULT_DEBUG_CHANNEL(richedit);
25 static int ME_GetOptimalBuffer(int nLen)
27 /* FIXME: This seems wasteful for tabs and end of lines strings,
28 * since they have a small fixed length. */
29 return ((sizeof(WCHAR) * nLen) + 128) & ~63;
32 /* Create a buffer (uninitialized string) of size nMaxChars */
33 static ME_String *ME_MakeStringB(int nMaxChars)
35 ME_String *s = ALLOC_OBJ(ME_String);
38 s->nBuffer = ME_GetOptimalBuffer(s->nLen + 1);
39 s->szData = ALLOC_N_OBJ(WCHAR, s->nBuffer);
40 s->szData[s->nLen] = 0;
44 ME_String *ME_MakeStringN(LPCWSTR szText, int nMaxChars)
46 ME_String *s = ME_MakeStringB(nMaxChars);
47 /* Native allows NULL chars */
48 memcpy(s->szData, szText, s->nLen * sizeof(WCHAR));
52 /* Make a string by repeating a char nMaxChars times */
53 ME_String *ME_MakeStringR(WCHAR cRepeat, int nMaxChars)
56 ME_String *s = ME_MakeStringB(nMaxChars);
57 for (i = 0; i < nMaxChars; i++)
58 s->szData[i] = cRepeat;
62 ME_String *ME_StrDup(const ME_String *s)
64 return ME_MakeStringN(s->szData, s->nLen);
67 void ME_DestroyString(ME_String *s)
74 BOOL ME_InsertString(ME_String *s, int ofs, const WCHAR *insert, int len)
76 DWORD new_len = s->nLen + len + 1;
77 assert( ofs <= s->nLen );
79 if( new_len > s->nBuffer )
81 s->nBuffer = ME_GetOptimalBuffer( new_len );
82 s->szData = heap_realloc( s->szData, s->nBuffer * sizeof(WCHAR) );
83 if (!s->szData) return FALSE;
86 memmove( s->szData + ofs + len, s->szData + ofs, (s->nLen - ofs + 1) * sizeof(WCHAR) );
87 memcpy( s->szData + ofs, insert, len * sizeof(WCHAR) );
93 BOOL ME_AppendString(ME_String *s, const WCHAR *append, int len)
95 return ME_InsertString( s, s->nLen, append, len );
98 ME_String *ME_VSplitString(ME_String *orig, int charidx)
102 /*if (charidx<0) charidx = 0;
103 if (charidx>orig->nLen) charidx = orig->nLen;
106 assert(charidx<=orig->nLen);
108 s = ME_MakeStringN(orig->szData+charidx, orig->nLen-charidx);
109 orig->nLen = charidx;
110 orig->szData[charidx] = '\0';
114 void ME_StrDeleteV(ME_String *s, int nVChar, int nChars)
116 int end_ofs = nVChar + nChars;
120 assert(end_ofs <= s->nLen);
122 memmove(s->szData + nVChar, s->szData + end_ofs,
123 (s->nLen - end_ofs + 1) * sizeof(WCHAR));
128 ME_WordBreakProc(LPWSTR s, INT start, INT len, INT code)
130 /* FIXME: Native also knows about punctuation */
131 TRACE("s==%s, start==%d, len==%d, code==%d\n",
132 debugstr_wn(s, len), start, len, code);
133 /* convert number of bytes to number of characters. */
134 len /= sizeof(WCHAR);
138 return ME_IsWSpace(s[start]);
140 case WB_MOVEWORDLEFT:
141 while (start && ME_IsWSpace(s[start - 1]))
143 while (start && !ME_IsWSpace(s[start - 1]))
147 case WB_MOVEWORDRIGHT:
148 while (start < len && !ME_IsWSpace(s[start]))
150 while (start < len && ME_IsWSpace(s[start]))
159 ME_CallWordBreakProc(ME_TextEditor *editor, WCHAR *str, INT len, INT start, INT code)
161 if (!editor->pfnWordBreak) {
162 return ME_WordBreakProc(str, start, len * sizeof(WCHAR), code);
163 } else if (!editor->bEmulateVersion10) {
164 /* MSDN lied about the third parameter for EditWordBreakProc being the number
165 * of characters, it is actually the number of bytes of the string. */
166 return editor->pfnWordBreak(str, start, len * sizeof(WCHAR), code);
169 int buffer_size = WideCharToMultiByte(CP_ACP, 0, str, len,
170 NULL, 0, NULL, NULL);
171 char *buffer = heap_alloc(buffer_size);
172 WideCharToMultiByte(CP_ACP, 0, str, len,
173 buffer, buffer_size, NULL, NULL);
174 result = editor->pfnWordBreak((WCHAR*)buffer, start, buffer_size, code);
180 LPWSTR ME_ToUnicode(BOOL unicode, LPVOID psz)
188 int nChars = MultiByteToWideChar(CP_ACP, 0, psz, -1, NULL, 0);
189 if((tmp = ALLOC_N_OBJ(WCHAR, nChars)) != NULL)
190 MultiByteToWideChar(CP_ACP, 0, psz, -1, tmp, nChars);
195 void ME_EndToUnicode(BOOL unicode, LPVOID psz)