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- Support right-aligned text in TabbedTextOut.

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- Add documentation.
This commit is contained in:
Robert Shearman 2005-07-12 18:11:26 +00:00 committed by Alexandre Julliard
parent 88f73c4f33
commit ff93df6e0f
1 changed files with 68 additions and 16 deletions
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84
dlls/user/text.c
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@ -1214,8 +1214,9 @@ static LONG TEXT_TabbedTextOut( HDC hdc, INT x, INT y, LPCWSTR lpstr,
{
INT defWidth;
SIZE extent;
int i, tabPos = x;
int i;
int start = x;
BOOL first = TRUE;
extent.cx = 0;
extent.cy = 0;
@ -1239,43 +1240,69 @@ static LONG TEXT_TabbedTextOut( HDC hdc, INT x, INT y, LPCWSTR lpstr,
while (count > 0)
{
/* tokenize string by tabs */
for (i = 0; i < count; i++)
if (lpstr[i] == '\t') break;
GetTextExtentPointW( hdc, lpstr, i, &extent );
while ((cTabStops > 0) &&
(nTabOrg + *lpTabPos <= x + extent.cx))
/* the first time round the loop we should use the value of x
* passed into the function.
* all other times, we calculate it here */
if (!first)
{
lpTabPos++;
cTabStops--;
/* get x coordinate for the drawing of this string */
for (; cTabStops > 0; lpTabPos++, cTabStops--)
{
if (*lpTabPos >= 0)
{
if (nTabOrg + *lpTabPos >= x)
{
x = nTabOrg + *lpTabPos;
break;
}
}
else
{
/* if tab pos is negative then text is right-aligned to tab
* stop meaning that the string extends to the left, so we
* must subtract the width of the string */
if (nTabOrg + -*lpTabPos -extent.cx >= x)
{
x = nTabOrg + -*lpTabPos - extent.cx;
break;
}
}
}
/* if we have run out of tab stops and we have a valid default tab
* stop width then round x up to that width */
if ((cTabStops <= 0) && (defWidth > 0))
x = nTabOrg + ((x - nTabOrg) / defWidth + 1) * defWidth;
}
if (i == count)
tabPos = x + extent.cx;
else if (cTabStops > 0)
tabPos = nTabOrg + *lpTabPos;
else if (defWidth <= 0)
tabPos = x + extent.cx;
else
tabPos = nTabOrg + ((x + extent.cx - nTabOrg) / defWidth + 1) * defWidth;
else first = FALSE;
if (fDisplayText)
{
RECT r;
r.left = x;
r.top = y;
r.right = tabPos;
r.right = x + extent.cx;
r.bottom = y + extent.cy;
ExtTextOutW( hdc, x, y, GetBkMode(hdc) == OPAQUE ? ETO_OPAQUE : 0,
&r, lpstr, i, NULL );
}
x = tabPos;
x += extent.cx;
count -= i+1;
lpstr += i+1;
}
return MAKELONG(tabPos - start, extent.cy);
return MAKELONG(x - start, extent.cy);
}
/***********************************************************************
* TabbedTextOutA (USER32.@)
*
* See TabbedTextOutW.
*/
LONG WINAPI TabbedTextOutA( HDC hdc, INT x, INT y, LPCSTR lpstr, INT count,
INT cTabStops, const INT *lpTabPos, INT nTabOrg )
@ -1293,6 +1320,31 @@ LONG WINAPI TabbedTextOutA( HDC hdc, INT x, INT y, LPCSTR lpstr, INT count,
/***********************************************************************
* TabbedTextOutW (USER32.@)
*
* Draws tabbed text aligned using the specified tab stops.
*
* PARAMS
* hdc [I] Handle to device context to draw to.
* x [I] X co-ordinate to start drawing the text at in logical units.
* y [I] Y co-ordinate to start drawing the text at in logical units.
* str [I] Pointer to the characters to draw.
* count [I] Number of WCHARs pointed to by str.
* cTabStops [I] Number of tab stops pointed to by lpTabPos.
* lpTabPos [I] Tab stops in logical units. Should be sorted in ascending order.
* nTabOrg [I] Starting position to expand tabs from in logical units.
*
* RETURNS
* The dimensions of the string drawn. The height is in the high-order word
* and the width is in the low-order word.
*
* NOTES
* The tabs stops can be negative, in which case the text is right aligned to
* that tab stop and, despite what MSDN says, this is supported on
* Windows XP SP2.
*
* BUGS
* MSDN says that the TA_UPDATECP from GetTextAlign causes this function to
* ignore the x and y co-ordinates, but this is unimplemented at the moment.
*/
LONG WINAPI TabbedTextOutW( HDC hdc, INT x, INT y, LPCWSTR str, INT count,
INT cTabStops, const INT *lpTabPos, INT nTabOrg )