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241 lines
6 KiB
C
241 lines
6 KiB
C
/*
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* RichEdit - string operations
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*
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* Copyright 2004 by Krzysztof Foltman
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include "editor.h"
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WINE_DEFAULT_DEBUG_CHANNEL(richedit);
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static int ME_GetOptimalBuffer(int nLen)
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{
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return ((sizeof(WCHAR) * nLen) + 128) & ~63;
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}
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static ME_String *make_string( void (*free)(ME_String *) )
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{
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ME_String *s = heap_alloc( sizeof(*s) );
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if (s) s->free = free;
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return s;
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}
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/* Create a ME_String using the const string provided.
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* str must exist for the lifetime of the returned ME_String.
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*/
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ME_String *ME_MakeStringConst(const WCHAR *str, int len)
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{
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ME_String *s = make_string( NULL );
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if (!s) return NULL;
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s->szData = (WCHAR *)str;
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s->nLen = len;
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s->nBuffer = 0;
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return s;
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}
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static void heap_string_free(ME_String *s)
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{
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heap_free( s->szData );
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}
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/* Create a buffer (uninitialized string) of size nMaxChars */
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ME_String *ME_MakeStringEmpty(int nMaxChars)
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{
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ME_String *s = make_string( heap_string_free );
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if (!s) return NULL;
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s->nLen = nMaxChars;
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s->nBuffer = ME_GetOptimalBuffer(s->nLen + 1);
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s->szData = heap_alloc( s->nBuffer * sizeof(WCHAR) );
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if (!s->szData)
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{
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heap_free( s );
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return NULL;
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}
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s->szData[s->nLen] = 0;
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return s;
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}
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ME_String *ME_MakeStringN(LPCWSTR szText, int nMaxChars)
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{
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ME_String *s = ME_MakeStringEmpty(nMaxChars);
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if (!s) return NULL;
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memcpy(s->szData, szText, s->nLen * sizeof(WCHAR));
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return s;
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}
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/* Make a string by repeating a char nMaxChars times */
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ME_String *ME_MakeStringR(WCHAR cRepeat, int nMaxChars)
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{
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int i;
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ME_String *s = ME_MakeStringEmpty(nMaxChars);
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if (!s) return NULL;
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for (i = 0; i < nMaxChars; i++)
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s->szData[i] = cRepeat;
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return s;
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}
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void ME_DestroyString(ME_String *s)
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{
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if (!s) return;
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if (s->free) s->free( s );
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heap_free( s );
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}
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BOOL ME_InsertString(ME_String *s, int ofs, const WCHAR *insert, int len)
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{
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DWORD new_len = s->nLen + len + 1;
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WCHAR *new;
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assert( s->nBuffer ); /* Not a const string */
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assert( ofs <= s->nLen );
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if( new_len > s->nBuffer )
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{
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s->nBuffer = ME_GetOptimalBuffer( new_len );
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new = heap_realloc( s->szData, s->nBuffer * sizeof(WCHAR) );
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if (!new) return FALSE;
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s->szData = new;
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}
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memmove( s->szData + ofs + len, s->szData + ofs, (s->nLen - ofs + 1) * sizeof(WCHAR) );
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memcpy( s->szData + ofs, insert, len * sizeof(WCHAR) );
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s->nLen += len;
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return TRUE;
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}
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BOOL ME_AppendString(ME_String *s, const WCHAR *append, int len)
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{
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return ME_InsertString( s, s->nLen, append, len );
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}
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ME_String *ME_VSplitString(ME_String *orig, int charidx)
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{
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ME_String *s;
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assert(orig->nBuffer); /* Not a const string */
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assert(charidx>=0);
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assert(charidx<=orig->nLen);
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s = ME_MakeStringN(orig->szData+charidx, orig->nLen-charidx);
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if (!s) return NULL;
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orig->nLen = charidx;
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orig->szData[charidx] = '\0';
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return s;
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}
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void ME_StrDeleteV(ME_String *s, int nVChar, int nChars)
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{
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int end_ofs = nVChar + nChars;
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assert(s->nBuffer); /* Not a const string */
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assert(nChars >= 0);
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assert(nVChar >= 0);
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assert(end_ofs <= s->nLen);
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memmove(s->szData + nVChar, s->szData + end_ofs,
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(s->nLen - end_ofs + 1) * sizeof(WCHAR));
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s->nLen -= nChars;
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}
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static int
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ME_WordBreakProc(LPWSTR s, INT start, INT len, INT code)
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{
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/* FIXME: Native also knows about punctuation */
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TRACE("s==%s, start==%d, len==%d, code==%d\n",
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debugstr_wn(s, len), start, len, code);
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switch (code)
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{
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case WB_ISDELIMITER:
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return ME_IsWSpace(s[start]);
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case WB_LEFT:
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case WB_MOVEWORDLEFT:
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while (start && ME_IsWSpace(s[start - 1]))
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start--;
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while (start && !ME_IsWSpace(s[start - 1]))
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start--;
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return start;
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case WB_RIGHT:
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case WB_MOVEWORDRIGHT:
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while (start < len && !ME_IsWSpace(s[start]))
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start++;
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while (start < len && ME_IsWSpace(s[start]))
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start++;
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return start;
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}
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return 0;
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}
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int
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ME_CallWordBreakProc(ME_TextEditor *editor, WCHAR *str, INT len, INT start, INT code)
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{
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if (!editor->pfnWordBreak) {
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return ME_WordBreakProc(str, start, len, code);
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} else if (!editor->bEmulateVersion10) {
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/* MSDN lied about the third parameter for EditWordBreakProc being the number
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* of characters, it is actually the number of bytes of the string. */
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return editor->pfnWordBreak(str, start, len * sizeof(WCHAR), code);
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} else {
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int result;
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int buffer_size = WideCharToMultiByte(CP_ACP, 0, str, len,
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NULL, 0, NULL, NULL);
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char *buffer = heap_alloc(buffer_size);
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if (!buffer) return 0;
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WideCharToMultiByte(CP_ACP, 0, str, len,
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buffer, buffer_size, NULL, NULL);
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result = editor->pfnWordBreak((WCHAR*)buffer, start, buffer_size, code);
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heap_free(buffer);
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return result;
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}
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}
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LPWSTR ME_ToUnicode(LONG codepage, LPVOID psz, INT *len)
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{
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*len = 0;
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if (!psz) return NULL;
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if (codepage == CP_UNICODE)
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{
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*len = lstrlenW(psz);
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return psz;
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}
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else {
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WCHAR *tmp;
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int nChars = MultiByteToWideChar(codepage, 0, psz, -1, NULL, 0);
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if(!nChars) return NULL;
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if((tmp = heap_alloc( nChars * sizeof(WCHAR) )) != NULL)
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*len = MultiByteToWideChar(codepage, 0, psz, -1, tmp, nChars) - 1;
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return tmp;
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}
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}
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void ME_EndToUnicode(LONG codepage, LPVOID psz)
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{
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if (codepage != CP_UNICODE)
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heap_free( psz );
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}
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