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afe92e8e8a
wine/dlls/user/text.c
Bill Medland afe92e8e8a Split the path and word/end ellipsification out of the main function 
and do them thoroughly. The existing method would be incorrect where
tabs were involved and in some kerning situations.
2002-02-05 18:07:04 +00:00

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/*
* USER text functions
*
* Copyright 1993, 1994 Alexandre Julliard
*
* Contains
* 1. DrawText functions
* 2. GrayString functions
* 3. TabbedText functions
*/
#include <string.h>
#include <assert.h>
#include "windef.h"
#include "wingdi.h"
#include "wine/winuser16.h"
#include "wine/unicode.h"
#include "winbase.h"
#include "winerror.h"
#include "winnls.h"
#include "user.h"
#include "debugtools.h"
DEFAULT_DEBUG_CHANNEL(text);
#define countof(a) (sizeof(a)/sizeof(a[0]))
/*********************************************************************
*
* DrawText functions
*
* Design issues
* How many buffers to use
* While processing in DrawText there are potentially three different forms
* of the text that need to be held. How are they best held?
* 1. The original text is needed, of course, to see what to display.
* 2. The text that will be returned to the user if the DT_MODIFYSTRING is
* in effect.
* 3. The buffered text that is about to be displayed e.g. the current line.
* Typically this will exclude the ampersands used for prefixing etc.
*
* Complications.
* a. If the buffered text to be displayed includes the ampersands then
* we will need special measurement and draw functions that will ignore
* the ampersands (e.g. by copying to a buffer without the prefix and
* then using the normal forms). This may involve less space but may
* require more processing. e.g. since a line containing tabs may
* contain several underlined characters either we need to carry around
* a list of prefix locations or we may need to locate them several
* times.
* b. If we actually directly modify the "original text" as we go then we
* will need some special "caching" to handle the fact that when we
* ellipsify the text the ellipsis may modify the next line of text,
* which we have not yet processed. (e.g. ellipsification of a W at the
* end of a line will overwrite the W, the \n and the first character of
* the next line, and a \0 will overwrite the second. Try it!!)
*
* Option 1. Three separate storages. (To be implemented)
* If DT_MODIFYSTRING is in effect then allocate an extra buffer to hold
* the edited string in some form, either as the string itself or as some
* sort of "edit list" to be applied just before returning.
* Use a buffer that holds the ellipsified current line sans ampersands
* and accept the need occasionally to recalculate the prefixes (if
* DT_EXPANDTABS and not DT_NOPREFIX and not DT_HIDEPREFIX)
*/
#define TAB 9
#define LF 10
#define CR 13
#define SPACE 32
#define PREFIX 38
#define ELLIPSIS "..."
#define FORWARD_SLASH '/'
#define BACK_SLASH '\\'
static const WCHAR SPACEW[] = {' ', 0};
static const WCHAR oW[] = {'o', 0};
static const WCHAR ELLIPSISW[] = {'.','.','.', 0};
static const WCHAR FORWARD_SLASHW[] = {'/', 0};
static const WCHAR BACK_SLASHW[] = {'\\', 0};
static int tabstop;
static int tabwidth;
static int spacewidth;
static int prefix_offset;
/*********************************************************************
* TEXT_Ellipsify (static)
*
* Add an ellipsis to the end of the given string whilst ensuring it fits.
*
* If the ellipsis alone doesn't fit then it will be returned anyway.
*
* See Also TEXT_PathEllipsify
*
* Arguments
* hdc [in] The handle to the DC that defines the font.
* str [in/out] The string that needs to be modified.
* max_str [in] The dimension of str (number of WCHAR).
* len_str [in/out] The number of characters in str
* width [in] The maximum width permitted (in logical coordinates)
* size [out] The dimensions of the text
* modstr [out] The modified form of the string, to be returned to the
* calling program. It is assumed that the caller has
* made sufficient space available so we don't need to
* know the size of the space. This pointer may be NULL if
* the modified string is not required.
* len_before [out] The number of characters before the ellipsis.
* len_ellip [out] The number of characters in the ellipsis.
*
* See for example Microsoft article Q249678.
*
* For now we will simply use three dots rather than worrying about whether
* the font contains an explicit ellipsis character.
*/
static void TEXT_Ellipsify (HDC hdc, WCHAR *str, unsigned int max_len,
unsigned int *len_str, int width, SIZE *size,
WCHAR *modstr,
int *len_before, int *len_ellip)
{
unsigned int len_ellipsis;
len_ellipsis = strlenW (ELLIPSISW);
if (len_ellipsis > max_len) len_ellipsis = max_len;
if (*len_str > max_len - len_ellipsis)
*len_str = max_len - len_ellipsis;
for ( ; ; )
{
strncpyW (str + *len_str, ELLIPSISW, len_ellipsis);
if (!GetTextExtentExPointW (hdc, str, *len_str + len_ellipsis, width,
NULL, NULL, size)) break;
if (!*len_str || size->cx <= width) break;
(*len_str)--;
}
*len_ellip = len_ellipsis;
*len_before = *len_str;
*len_str += len_ellipsis;
if (modstr)
{
strncpyW (modstr, str, *len_str);
*(str+*len_str) = '\0';
}
}
/*********************************************************************
* TEXT_PathElllipsify (static)
*
* Add an ellipsis to the provided string in order to make it fit within
* the width. The ellipsis is added as specified for the DT_PATH_ELLIPSIS
* flag.
*
* See Also TEXT_Ellipsify
*
* Arguments
* hdc [in] The handle to the DC that defines the font.
* str [in/out] The string that needs to be modified
* max_str [in] The dimension of str (number of WCHAR).
* len_str [in/out] The number of characters in str
* width [in] The maximum width permitted (in logical coordinates)
* size [out] The dimensions of the text
* modstr [out] The modified form of the string, to be returned to the
* calling program. It is assumed that the caller has
* made sufficient space available so we don't need to
* know the size of the space. This pointer may be NULL if
* the modified string is not required.
* len_before [out] The number of characters before the ellipsis.
* len_ellip [out] The number of characters in the ellipsis.
* len_after [out] The number of characters after the ellipsis.
*
* For now we will simply use three dots rather than worrying about whether
* the font contains an explicit ellipsis character.
*
* The following applies, I think to Win95. We will need to extend it for
* Win98 which can have both path and end ellipsis at the same time (e.g.
* C:\MyLongFileName.Txt becomes ...\MyLongFileN...)
*
* The resulting string consists of as much as possible of the following:
* 1. The ellipsis itself
* 2. The last \ or / of the string (if any)
* 3. Everything after the last \ or / of the string (if any) or the whole
* string if there is no / or \. I believe that under Win95 this would
* include everything even though some might be clipped off the end whereas
* under Win98 that might be ellipsified too. (Not yet implemented). Yet
* to be investigated is whether this would include wordbreaking if the
* filename is more than 1 word and splitting if DT_EDITCONTROL was in
* effect. (If DT_EDITCONTROL is in effect then on occasions text will be
* broken within words).
* 4. All the stuff before the / or \, which is placed before the ellipsis.
*/
static void TEXT_PathEllipsify (HDC hdc, WCHAR *str, unsigned int max_len,
unsigned int *len_str, int width, SIZE *size,
WCHAR *modstr,
int *len_before, int *len_ellip, int *len_after)
{
int len_ellipsis;
int len_trailing;
WCHAR *lastBkSlash, *lastFwdSlash, *lastSlash;
len_ellipsis = strlenW (ELLIPSISW);
if (!max_len) return;
if (len_ellipsis >= max_len) len_ellipsis = max_len - 1;
if (*len_str + len_ellipsis >= max_len)
*len_str = max_len - len_ellipsis-1;
/* Hopefully this will never happen, otherwise it would probably lose
* the wrong character
*/
str[*len_str] = '\0'; /* to simplify things */
lastBkSlash = strrchrW (str, BACK_SLASH);
lastFwdSlash = strrchrW (str, FORWARD_SLASH);
lastSlash = lastBkSlash > lastFwdSlash ? lastBkSlash : lastFwdSlash;
if (!lastSlash) lastSlash = str;
len_trailing = *len_str - (lastSlash - str);
/* overlap-safe movement to the right */
memmove (lastSlash+len_ellipsis, lastSlash, len_trailing * sizeof(WCHAR));
strncpyW (lastSlash, ELLIPSISW, len_ellipsis);
len_trailing += len_ellipsis;
/* From this point on lastSlash actually points to the ellipsis in front
* of the last slash and len_trailing includes the ellipsis
*/
for ( ; ; )
{
if (!GetTextExtentExPointW (hdc, str, *len_str + len_ellipsis, width,
NULL, NULL, size)) break;
if (lastSlash == str || size->cx <= width) break;
/* overlap-safe movement to the left */
memmove (lastSlash-1, lastSlash, len_trailing * sizeof(WCHAR));
lastSlash--;
assert (*len_str);
(*len_str)--;
}
*len_before = lastSlash-str;
*len_ellip = len_ellipsis;
*len_after = len_trailing - len_ellipsis;
*len_str += len_ellipsis;
if (modstr)
{
strncpyW (modstr, str, *len_str);
*(str+*len_str) = '\0';
}
}
void TEXT_CopySansPrefix (int noprefix, WCHAR *d, int *len_d, const WCHAR *s, int len_s)
{
if (noprefix)
{
strncpyW (d, s, len_s);
*len_d = len_s;
}
else
{
*len_d = 0;
while (len_s--)
{
if (*s == PREFIX && len_s)
{
len_s--;
s++;
}
*d++ = *s++;
(*len_d)++;
}
}
}
/*********************************************************************
* TEXT_Reprefix
*
* Reanalyse the text to find the prefixed character. This is called when
* wordbreaking or ellipsification has shortened the string such that the
* previously noted prefixed character is no longer visible.
*
* Parameters
* str [in] The original string segment (including all characters)
* n1 [in] The number of characters visible before the path ellipsis
* n2 [in] The number of characters replaced by the path ellipsis
* ne [in] The number of characters in the path ellipsis, ignored if
* n2 is zero
* n3 [in] The number of characters visible after the path ellipsis
*
* Return Values
* The prefix offset within the new string segment (the one that contains the
* ellipses and does not contain the prefix characters) (-1 if none)
*
* Remarks
* We know that n1+n2+n3 must be strictly less than the length of the segment
* (because otherwise there would be no need to call this function)
*/
static int TEXT_Reprefix (const WCHAR *str, unsigned int n1, unsigned int n2,
unsigned int ne, unsigned int n3)
{
int result = -1;
unsigned int i = 0;
unsigned int n = n1 + n2 + n3;
if (!n2) ne = 0;
while (i < n)
{
if (i == n1)
{
/* Reached the path ellipsis; jump over it */
str += n2;
i += n2;
if (!n3) break; /* Nothing after the path ellipsis */
}
if (*str++ == PREFIX)
{
result = (i < n1) ? i : i - n2 + ne;
str++;
}
else;
i++;
}
return result;
}
/*********************************************************************
* Return next line of text from a string.
*
* hdc - handle to DC.
* str - string to parse into lines.
* count - length of str.
* dest - destination in which to return line.
* len - dest buffer size in chars on input, copied length into dest on output.
* width - maximum width of line in pixels.
* format - format type passed to DrawText.
*
* Returns pointer to next char in str after end of the line
* or NULL if end of str reached.
*
* FIXME:
* GetTextExtentPoint is used to get the width of each character,
* rather than GetCharABCWidth... So the whitespace between
* characters is ignored, and the reported len is too great.
*/
static const WCHAR *TEXT_NextLineW( HDC hdc, const WCHAR *str, int *count,
WCHAR *dest, int *len, int width, WORD format)
{
int i = 0, j = 0, k;
int plen = 0;
int numspaces;
SIZE size;
int lasttab = 0;
int wb_i = 0, wb_j = 0, wb_count = 0;
int maxl = *len;
while (*count && j < maxl)
{
switch (str[i])
{
case CR:
case LF:
if (!(format & DT_SINGLELINE))
{
if ((*count > 1) && (str[i] == CR) && (str[i+1] == LF))
{
(*count)--;
i++;
}
i++;
*len = j;
(*count)--;
return (&str[i]);
}
dest[j++] = str[i++];
if (!(format & DT_NOCLIP) || !(format & DT_NOPREFIX) ||
(format & DT_WORDBREAK))
{
if (!GetTextExtentPointW(hdc, &dest[j-1], 1, &size))
return NULL;
plen += size.cx;
}
break;
case PREFIX:
if (!(format & DT_NOPREFIX) && *count > 1)
{
if (str[++i] == PREFIX)
(*count)--;
else {
prefix_offset = j;
break;
}
}
dest[j++] = str[i++];
if (!(format & DT_NOCLIP) || !(format & DT_NOPREFIX) ||
(format & DT_WORDBREAK))
{
if (!GetTextExtentPointW(hdc, &dest[j-1], 1, &size))
return NULL;
plen += size.cx;
}
break;
case TAB:
if (format & DT_EXPANDTABS)
{
wb_i = ++i;
wb_j = j;
wb_count = *count;
if (!GetTextExtentPointW(hdc, &dest[lasttab], j - lasttab, &size))
return NULL;
numspaces = (tabwidth - size.cx) / spacewidth;
for (k = 0; k < numspaces; k++)
dest[j++] = SPACE;
plen += tabwidth - size.cx;
lasttab = wb_j + numspaces;
}
else
{
dest[j++] = str[i++];
if (!(format & DT_NOCLIP) || !(format & DT_NOPREFIX) ||
(format & DT_WORDBREAK))
{
if (!GetTextExtentPointW(hdc, &dest[j-1], 1, &size))
return NULL;
plen += size.cx;
}
}
break;
case SPACE:
dest[j++] = str[i++];
if (!(format & DT_NOCLIP) || !(format & DT_NOPREFIX) ||
(format & DT_WORDBREAK))
{
wb_i = i;
wb_j = j - 1;
wb_count = *count;
if (!GetTextExtentPointW(hdc, &dest[j-1], 1, &size))
return NULL;
plen += size.cx;
}
break;
default:
dest[j++] = str[i++];
if (!(format & DT_NOCLIP) || !(format & DT_NOPREFIX) ||
(format & DT_WORDBREAK))
{
if (!GetTextExtentPointW(hdc, &dest[j-1], 1, &size))
return NULL;
plen += size.cx;
}
}
(*count)--;
if (!(format & DT_NOCLIP) || (format & DT_WORDBREAK))
{
if (plen > width)
{
if (format & DT_WORDBREAK)
{
if (wb_j)
{
*len = wb_j;
*count = wb_count - 1;
return (&str[wb_i]);
}
}
else
{
*len = j;
return (&str[i]);
}
}
}
}
*len = j;
return NULL;
}
/***********************************************************************
* TEXT_DrawUnderscore
*
* Draw the underline under the prefixed character
*
* Parameters
* hdc [in] The handle of the DC for drawing
* x [in] The x location of the line segment (logical coordinates)
* y [in] The y location of where the underscore should appear
* (logical coordinates)
* str [in] The text of the line segment
* offset [in] The offset of the underscored character within str
*/
static void TEXT_DrawUnderscore (HDC hdc, int x, int y, const WCHAR *str, int offset)
{
int prefix_x;
int prefix_end;
SIZE size;
HPEN hpen;
HPEN oldPen;
GetTextExtentPointW (hdc, str, offset, &size);
prefix_x = x + size.cx;
GetTextExtentPointW (hdc, str, offset+1, &size);
prefix_end = x + size.cx - 1;
/* The above method may eventually be slightly wrong due to kerning etc. */
hpen = CreatePen (PS_SOLID, 1, GetTextColor (hdc));
oldPen = SelectObject (hdc, hpen);
MoveToEx (hdc, prefix_x, y, NULL);
LineTo (hdc, prefix_end, y);
SelectObject (hdc, oldPen);
DeleteObject (hpen);
}
/***********************************************************************
* DrawTextExW (USER32.@)
*
* The documentation on the extra space required for DT_MODIFYSTRING at MSDN
* is not quite complete, especially with regard to \0. We will assume that
* the returned string could have a length of up to i_count+3 and also have
* a trailing \0 (which would be 4 more than a not-null-terminated string but
* 3 more than a null-terminated string). If this is not so then increase
* the allowance in DrawTextExA.
*/
#define MAX_STATIC_BUFFER 1024
INT WINAPI DrawTextExW( HDC hdc, LPWSTR str, INT i_count,
LPRECT rect, UINT flags, LPDRAWTEXTPARAMS dtp )
{
SIZE size;
const WCHAR *strPtr;
static WCHAR line[MAX_STATIC_BUFFER];
int len, lh, count=i_count;
TEXTMETRICW tm;
int lmargin = 0, rmargin = 0;
int x = rect->left, y = rect->top;
int width = rect->right - rect->left;
int max_width = 0;
TRACE("%s, %d , [(%d,%d),(%d,%d)]\n", debugstr_wn (str, count), count,
rect->left, rect->top, rect->right, rect->bottom);
if (dtp) TRACE("Params: iTabLength=%d, iLeftMargin=%d, iRightMargin=%d\n",
dtp->iTabLength, dtp->iLeftMargin, dtp->iRightMargin);
if (!str) return 0;
if (count == -1) count = strlenW(str);
if (count == 0) return 0;
strPtr = str;
GetTextMetricsW(hdc, &tm);
if (flags & DT_EXTERNALLEADING)
lh = tm.tmHeight + tm.tmExternalLeading;
else
lh = tm.tmHeight;
if (dtp)
{
lmargin = dtp->iLeftMargin * tm.tmAveCharWidth;
rmargin = dtp->iRightMargin * tm.tmAveCharWidth;
if (!(flags & (DT_CENTER | DT_RIGHT)))
x += lmargin;
dtp->uiLengthDrawn = 0; /* This param RECEIVES number of chars processed */
}
tabstop = ((flags & DT_TABSTOP) && dtp) ? dtp->iTabLength : 8;
if (flags & DT_EXPANDTABS)
{
GetTextExtentPointW(hdc, SPACEW, 1, &size);
spacewidth = size.cx;
GetTextExtentPointW(hdc, oW, 1, &size);
tabwidth = size.cx * tabstop;
}
if (flags & DT_CALCRECT) flags |= DT_NOCLIP;
do
{
prefix_offset = -1;
len = MAX_STATIC_BUFFER;
strPtr = TEXT_NextLineW(hdc, strPtr, &count, line, &len, width, flags);
if (!GetTextExtentPointW(hdc, line, len, &size)) return 0;
if (flags & DT_CENTER) x = (rect->left + rect->right -
size.cx) / 2;
else if (flags & DT_RIGHT) x = rect->right - size.cx;
if (flags & DT_SINGLELINE)
{
if (flags & DT_VCENTER) y = rect->top +
(rect->bottom - rect->top) / 2 - size.cy / 2;
else if (flags & DT_BOTTOM) y = rect->bottom - size.cy;
}
if ((flags & DT_SINGLELINE) && size.cx > width &&
(flags & (DT_PATH_ELLIPSIS | DT_END_ELLIPSIS | DT_WORD_ELLIPSIS)))
{
WCHAR tmpstr[countof(line)];
int len_before_ellipsis;
int len_ellipsis;
int len_after_ellipsis;
if (flags & DT_PATH_ELLIPSIS)
{
/* We may need to remeasure the string because it was clipped */
if ((flags & DT_WORDBREAK) || !(flags & DT_NOCLIP))
TEXT_CopySansPrefix ((flags & DT_NOPREFIX), line, &len, str, i_count >= 0 ? i_count : strlenW(str));
TEXT_PathEllipsify (hdc, line, countof(line), &len, width, &size, tmpstr, &len_before_ellipsis, &len_ellipsis, &len_after_ellipsis);
}
else
{
TEXT_Ellipsify (hdc, line, countof(line), &len, width, &size, tmpstr, &len_before_ellipsis, &len_ellipsis);
len_after_ellipsis = 0;
}
strPtr = NULL;
if (prefix_offset >= 0 &&
prefix_offset >= len_before_ellipsis)
prefix_offset = TEXT_Reprefix (str, len_before_ellipsis, strlenW(str)-len_ellipsis-len_before_ellipsis-len_after_ellipsis, len_ellipsis, len_after_ellipsis);
if (flags & DT_MODIFYSTRING)
strcpyW(str, tmpstr);
}
if (!(flags & DT_CALCRECT))
{
if (!ExtTextOutW( hdc, x, y,
((flags & DT_NOCLIP) ? 0 : ETO_CLIPPED) |
((flags & DT_RTLREADING) ? ETO_RTLREADING : 0),
rect, line, len, NULL )) return 0;
if (prefix_offset != -1)
TEXT_DrawUnderscore (hdc, x, y + tm.tmAscent + 1, line, prefix_offset);
}
else if (size.cx > max_width)
max_width = size.cx;
y += lh;
if (strPtr)
{
if (!(flags & DT_NOCLIP))
{
if (y > rect->bottom - lh)
break;
}
}
if (dtp)
dtp->uiLengthDrawn += len;
}
while (strPtr);
if (flags & DT_CALCRECT)
{
rect->right = rect->left + max_width;
rect->bottom = y;
if (dtp)
rect->right += lmargin + rmargin;
}
return y - rect->top;
}
/***********************************************************************
* DrawTextExA (USER32.@)
*
* If DT_MODIFYSTRING is specified then there must be room for up to
* 4 extra characters. We take great care about just how much modified
* string we return.
*/
INT WINAPI DrawTextExA( HDC hdc, LPSTR str, INT count,
LPRECT rect, UINT flags, LPDRAWTEXTPARAMS dtp )
{
WCHAR *wstr;
WCHAR *p;
INT ret = 0;
int i;
DWORD wcount;
DWORD wmax;
DWORD amax;
if (count == -1) count = strlen(str);
if (!count) return 0;
wcount = MultiByteToWideChar( CP_ACP, 0, str, count, NULL, 0 );
wmax = wcount;
amax = count;
if (flags & DT_MODIFYSTRING)
{
wmax += 4;
amax += 4;
}
wstr = HeapAlloc(GetProcessHeap(), 0, wmax * sizeof(WCHAR));
if (wstr)
{
MultiByteToWideChar( CP_ACP, 0, str, count, wstr, wcount );
if (flags & DT_MODIFYSTRING)
for (i=4, p=wstr+wcount; i--; p++) *p=0xFFFE;
/* Initialise the extra characters so that we can see which ones
* change. U+FFFE is guaranteed to be not a unicode character and
* so will not be generated by DrawTextEx itself.
*/
ret = DrawTextExW( hdc, wstr, wcount, rect, flags, NULL );
if (flags & DT_MODIFYSTRING)
{
/* Unfortunately the returned string may contain multiple \0s
* and so we need to measure it ourselves.
*/
for (i=4, p=wstr+wcount; i-- && *p != 0xFFFE; p++) wcount++;
WideCharToMultiByte( CP_ACP, 0, wstr, wcount, str, amax, NULL, NULL );
}
HeapFree(GetProcessHeap(), 0, wstr);
}
return ret;
}
/***********************************************************************
* DrawTextW (USER32.@)
*/
INT WINAPI DrawTextW( HDC hdc, LPCWSTR str, INT count, LPRECT rect, UINT flags )
{
DRAWTEXTPARAMS dtp;
memset (&dtp, 0, sizeof(dtp));
if (flags & DT_TABSTOP)
{
dtp.iTabLength = (flags >> 8) && 0xff;
flags &= 0xffff00ff;
}
return DrawTextExW(hdc, (LPWSTR)str, count, rect, flags, &dtp);
}
/***********************************************************************
* DrawTextA (USER32.@)
*/
INT WINAPI DrawTextA( HDC hdc, LPCSTR str, INT count, LPRECT rect, UINT flags )
{
DRAWTEXTPARAMS dtp;
memset (&dtp, 0, sizeof(dtp));
if (flags & DT_TABSTOP)
{
dtp.iTabLength = (flags >> 8) && 0xff;
flags &= 0xffff00ff;
}
return DrawTextExA( hdc, (LPSTR)str, count, rect, flags, &dtp );
}
/***********************************************************************
* DrawText (USER.85)
*/
INT16 WINAPI DrawText16( HDC16 hdc, LPCSTR str, INT16 count, LPRECT16 rect, UINT16 flags )
{
INT16 ret;
if (rect)
{
RECT rect32;
CONV_RECT16TO32( rect, &rect32 );
ret = DrawTextA( hdc, str, count, &rect32, flags );
CONV_RECT32TO16( &rect32, rect );
}
else ret = DrawTextA( hdc, str, count, NULL, flags);
return ret;
}
/***********************************************************************
*
* GrayString functions
*/
/* ### start build ### */
extern WORD CALLBACK TEXT_CallTo16_word_wlw(GRAYSTRINGPROC16,WORD,LONG,WORD);
/* ### stop build ### */
struct gray_string_info
{
GRAYSTRINGPROC16 proc;
LPARAM param;
};
/* callback for 16-bit gray string proc */
static BOOL CALLBACK gray_string_callback( HDC hdc, LPARAM param, INT len )
{
const struct gray_string_info *info = (struct gray_string_info *)param;
return TEXT_CallTo16_word_wlw( info->proc, hdc, info->param, len );
}
/***********************************************************************
* TEXT_GrayString
*
* FIXME: The call to 16-bit code only works because the wine GDI is a 16-bit
* heap and we can guarantee that the handles fit in an INT16. We have to
* rethink the strategy once the migration to NT handles is complete.
* We are going to get a lot of code-duplication once this migration is
* completed...
*
*/
static BOOL TEXT_GrayString(HDC hdc, HBRUSH hb, GRAYSTRINGPROC fn, LPARAM lp, INT len,
INT x, INT y, INT cx, INT cy, BOOL unicode, BOOL _32bit)
{
HBITMAP hbm, hbmsave;
HBRUSH hbsave;
HFONT hfsave;
HDC memdc;
int slen = len;
BOOL retval = TRUE;
COLORREF fg, bg;
if(!hdc) return FALSE;
if (!(memdc = CreateCompatibleDC(hdc))) return FALSE;
if(len == 0)
{
if(unicode)
slen = lstrlenW((LPCWSTR)lp);
else if(_32bit)
slen = strlen((LPCSTR)lp);
else
slen = strlen(MapSL(lp));
}
if((cx == 0 || cy == 0) && slen != -1)
{
SIZE s;
if(unicode)
GetTextExtentPoint32W(hdc, (LPCWSTR)lp, slen, &s);
else if(_32bit)
GetTextExtentPoint32A(hdc, (LPCSTR)lp, slen, &s);
else
GetTextExtentPoint32A(hdc, MapSL(lp), slen, &s);
if(cx == 0) cx = s.cx;
if(cy == 0) cy = s.cy;
}
hbm = CreateBitmap(cx, cy, 1, 1, NULL);
hbmsave = (HBITMAP)SelectObject(memdc, hbm);
hbsave = SelectObject( memdc, GetStockObject(BLACK_BRUSH) );
PatBlt( memdc, 0, 0, cx, cy, PATCOPY );
SelectObject( memdc, hbsave );
SetTextColor(memdc, RGB(255, 255, 255));
SetBkColor(memdc, RGB(0, 0, 0));
hfsave = (HFONT)SelectObject(memdc, GetCurrentObject(hdc, OBJ_FONT));
if(fn)
{
if(_32bit)
retval = fn(memdc, lp, slen);
else
retval = (BOOL)((BOOL16)((GRAYSTRINGPROC16)fn)((HDC16)memdc, lp, (INT16)slen));
}
else
{
if(unicode)
TextOutW(memdc, 0, 0, (LPCWSTR)lp, slen);
else if(_32bit)
TextOutA(memdc, 0, 0, (LPCSTR)lp, slen);
else
TextOutA(memdc, 0, 0, MapSL(lp), slen);
}
SelectObject(memdc, hfsave);
/*
* Windows doc says that the bitmap isn't grayed when len == -1 and
* the callback function returns FALSE. However, testing this on
* win95 showed otherwise...
*/
#ifdef GRAYSTRING_USING_DOCUMENTED_BEHAVIOUR
if(retval || len != -1)
#endif
{
hbsave = (HBRUSH)SelectObject(memdc, CACHE_GetPattern55AABrush());
PatBlt(memdc, 0, 0, cx, cy, 0x000A0329);
SelectObject(memdc, hbsave);
}
if(hb) hbsave = (HBRUSH)SelectObject(hdc, hb);
fg = SetTextColor(hdc, RGB(0, 0, 0));
bg = SetBkColor(hdc, RGB(255, 255, 255));
BitBlt(hdc, x, y, cx, cy, memdc, 0, 0, 0x00E20746);
SetTextColor(hdc, fg);
SetBkColor(hdc, bg);
if(hb) SelectObject(hdc, hbsave);
SelectObject(memdc, hbmsave);
DeleteObject(hbm);
DeleteDC(memdc);
return retval;
}
/***********************************************************************
* GrayString (USER.185)
*/
BOOL16 WINAPI GrayString16( HDC16 hdc, HBRUSH16 hbr, GRAYSTRINGPROC16 gsprc,
LPARAM lParam, INT16 cch, INT16 x, INT16 y,
INT16 cx, INT16 cy )
{
struct gray_string_info info;
if (!gsprc) return TEXT_GrayString(hdc, hbr, NULL, lParam, cch, x, y, cx, cy, FALSE, FALSE);
info.proc = gsprc;
info.param = lParam;
return TEXT_GrayString( hdc, hbr, gray_string_callback, (LPARAM)&info,
cch, x, y, cx, cy, FALSE, FALSE);
}
/***********************************************************************
* GrayStringA (USER32.@)
*/
BOOL WINAPI GrayStringA( HDC hdc, HBRUSH hbr, GRAYSTRINGPROC gsprc,
LPARAM lParam, INT cch, INT x, INT y,
INT cx, INT cy )
{
return TEXT_GrayString(hdc, hbr, gsprc, lParam, cch, x, y, cx, cy,
FALSE, TRUE);
}
/***********************************************************************
* GrayStringW (USER32.@)
*/
BOOL WINAPI GrayStringW( HDC hdc, HBRUSH hbr, GRAYSTRINGPROC gsprc,
LPARAM lParam, INT cch, INT x, INT y,
INT cx, INT cy )
{
return TEXT_GrayString(hdc, hbr, gsprc, lParam, cch, x, y, cx, cy,
TRUE, TRUE);
}
/***********************************************************************
*
* TabbedText functions
*/
/***********************************************************************
* TEXT_TabbedTextOut
*
* Helper function for TabbedTextOut() and GetTabbedTextExtent().
* Note: this doesn't work too well for text-alignment modes other
* than TA_LEFT|TA_TOP. But we want bug-for-bug compatibility :-)
*/
static LONG TEXT_TabbedTextOut( HDC hdc, INT x, INT y, LPCSTR lpstr,
INT count, INT cTabStops, const INT16 *lpTabPos16,
const INT *lpTabPos32, INT nTabOrg,
BOOL fDisplayText )
{
INT defWidth;
SIZE extent;
int i, tabPos = x;
int start = x;
extent.cx = 0;
extent.cy = 0;
if (cTabStops == 1)
{
defWidth = lpTabPos32 ? *lpTabPos32 : *lpTabPos16;
cTabStops = 0;
}
else
{
TEXTMETRICA tm;
GetTextMetricsA( hdc, &tm );
defWidth = 8 * tm.tmAveCharWidth;
}
while (count > 0)
{
for (i = 0; i < count; i++)
if (lpstr[i] == '\t') break;
GetTextExtentPointA( hdc, lpstr, i, &extent );
if (lpTabPos32)
{
while ((cTabStops > 0) &&
(nTabOrg + *lpTabPos32 <= x + extent.cx))
{
lpTabPos32++;
cTabStops--;
}
}
else
{
while ((cTabStops > 0) &&
(nTabOrg + *lpTabPos16 <= x + extent.cx))
{
lpTabPos16++;
cTabStops--;
}
}
if (i == count)
tabPos = x + extent.cx;
else if (cTabStops > 0)
tabPos = nTabOrg + (lpTabPos32 ? *lpTabPos32 : *lpTabPos16);
else
tabPos = nTabOrg + ((x + extent.cx - nTabOrg) / defWidth + 1) * defWidth;
if (fDisplayText)
{
RECT r;
r.left = x;
r.top = y;
r.right = tabPos;
r.bottom = y + extent.cy;
ExtTextOutA( hdc, x, y,
GetBkMode(hdc) == OPAQUE ? ETO_OPAQUE : 0,
&r, lpstr, i, NULL );
}
x = tabPos;
count -= i+1;
lpstr += i+1;
}
return MAKELONG(tabPos - start, extent.cy);
}
/***********************************************************************
* TabbedTextOut (USER.196)
*/
LONG WINAPI TabbedTextOut16( HDC16 hdc, INT16 x, INT16 y, LPCSTR lpstr,
INT16 count, INT16 cTabStops,
const INT16 *lpTabPos, INT16 nTabOrg )
{
TRACE("%04x %d,%d %s %d\n", hdc, x, y, debugstr_an(lpstr,count), count );
return TEXT_TabbedTextOut( hdc, x, y, lpstr, count, cTabStops,
lpTabPos, NULL, nTabOrg, TRUE );
}
/***********************************************************************
* TabbedTextOutA (USER32.@)
*/
LONG WINAPI TabbedTextOutA( HDC hdc, INT x, INT y, LPCSTR lpstr, INT count,
INT cTabStops, const INT *lpTabPos, INT nTabOrg )
{
TRACE("%04x %d,%d %s %d\n", hdc, x, y, debugstr_an(lpstr,count), count );
return TEXT_TabbedTextOut( hdc, x, y, lpstr, count, cTabStops,
NULL, lpTabPos, nTabOrg, TRUE );
}
/***********************************************************************
* TabbedTextOutW (USER32.@)
*/
LONG WINAPI TabbedTextOutW( HDC hdc, INT x, INT y, LPCWSTR str, INT count,
INT cTabStops, const INT *lpTabPos, INT nTabOrg )
{
LONG ret;
LPSTR p;
INT acount;
UINT codepage = CP_ACP; /* FIXME: get codepage of font charset */
acount = WideCharToMultiByte(codepage,0,str,count,NULL,0,NULL,NULL);
p = HeapAlloc( GetProcessHeap(), 0, acount );
if(p == NULL) return 0; /* FIXME: is this the correct return on failure */
acount = WideCharToMultiByte(codepage,0,str,count,p,acount,NULL,NULL);
ret = TabbedTextOutA( hdc, x, y, p, acount, cTabStops, lpTabPos, nTabOrg );
HeapFree( GetProcessHeap(), 0, p );
return ret;
}
/***********************************************************************
* GetTabbedTextExtent (USER.197)
*/
DWORD WINAPI GetTabbedTextExtent16( HDC16 hdc, LPCSTR lpstr, INT16 count,
INT16 cTabStops, const INT16 *lpTabPos )
{
TRACE("%04x %s %d\n", hdc, debugstr_an(lpstr,count), count );
return TEXT_TabbedTextOut( hdc, 0, 0, lpstr, count, cTabStops,
lpTabPos, NULL, 0, FALSE );
}
/***********************************************************************
* GetTabbedTextExtentA (USER32.@)
*/
DWORD WINAPI GetTabbedTextExtentA( HDC hdc, LPCSTR lpstr, INT count,
INT cTabStops, const INT *lpTabPos )
{
TRACE("%04x %s %d\n", hdc, debugstr_an(lpstr,count), count );
return TEXT_TabbedTextOut( hdc, 0, 0, lpstr, count, cTabStops,
NULL, lpTabPos, 0, FALSE );
}
/***********************************************************************
* GetTabbedTextExtentW (USER32.@)
*/
DWORD WINAPI GetTabbedTextExtentW( HDC hdc, LPCWSTR lpstr, INT count,
INT cTabStops, const INT *lpTabPos )
{
LONG ret;
LPSTR p;
INT acount;
UINT codepage = CP_ACP; /* FIXME: get codepage of font charset */
acount = WideCharToMultiByte(codepage,0,lpstr,count,NULL,0,NULL,NULL);
p = HeapAlloc( GetProcessHeap(), 0, acount );
if(p == NULL) return 0; /* FIXME: is this the correct failure value? */
acount = WideCharToMultiByte(codepage,0,lpstr,count,p,acount,NULL,NULL);
ret = GetTabbedTextExtentA( hdc, p, acount, cTabStops, lpTabPos );
HeapFree( GetProcessHeap(), 0, p );
return ret;
}
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