reactos/dll/win32/riched20/string.c

253 lines
6.3 KiB
C
Raw Normal View History

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