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[UXTHEME] -ThemeDrawCaptionText: Try to avoid a heap allocation when getting the window caption.

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svn path=/trunk/; revision=74552
This commit is contained in:
Giannis Adamopoulos
2017-05-15 16:05:14 +00:00
parent 98917d7d98
commit 6ac34f176c
1 changed files with 27 additions and 20 deletions
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reactos/dll/win32/uxtheme/nonclient.c
+27 -20
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@@ -100,16 +100,7 @@ UserGetWindowIcon(PDRAW_CONTEXT pcontext)
return hIcon;
}
WCHAR *UserGetWindowCaption(HWND hwnd)
{
INT len = 512;
WCHAR *text;
text = (WCHAR*)HeapAlloc(GetProcessHeap(), 0, len * sizeof(WCHAR));
if (text) InternalGetWindowText(hwnd, text, len);
return text;
}
HRESULT WINAPI ThemeDrawCaptionText(PDRAW_CONTEXT pcontext, RECT* pRect, int iPartId, int iStateId, LPCWSTR pszText)
HRESULT WINAPI ThemeDrawCaptionText(PDRAW_CONTEXT pcontext, RECT* pRect, int iPartId, int iStateId)
{
HRESULT hr;
HFONT hFont = NULL;
@@ -118,6 +109,25 @@ HRESULT WINAPI ThemeDrawCaptionText(PDRAW_CONTEXT pcontext, RECT* pRect, int iPa
COLORREF textColor;
COLORREF oldTextColor;
WCHAR buffer[50];
WCHAR *pszText = buffer;
INT len;
len = InternalGetWindowText(pcontext->hWnd, NULL, 0);
if (!len)
return S_OK;
len++; /* From now on this is the size of the buffer so include the null */
if (len > 50)
{
pszText = (WCHAR*)HeapAlloc(GetProcessHeap(), 0, len * sizeof(WCHAR));
if (!pszText)
return E_FAIL;
}
InternalGetWindowText(pcontext->hWnd, pszText, len);
hr = GetThemeSysFont(0,TMT_CAPTIONFONT,&logfont);
if(SUCCEEDED(hr))
hFont = CreateFontIndirectW(&logfont);
@@ -136,17 +146,21 @@ HRESULT WINAPI ThemeDrawCaptionText(PDRAW_CONTEXT pcontext, RECT* pRect, int iPa
iPartId,
iStateId,
pszText,
lstrlenW(pszText),
len - 1,
DT_VCENTER | DT_SINGLELINE | DT_END_ELLIPSIS,
0,
pRect);
SetTextColor(pcontext->hDC, oldTextColor);
if(hFont)
if (hFont)
{
SelectObject(pcontext->hDC, oldFont);
DeleteObject(hFont);
}
if (pszText != buffer)
{
HeapFree(GetProcessHeap(), 0, pszText);
}
return S_OK;
}
@@ -320,7 +334,6 @@ ThemeDrawCaption(PDRAW_CONTEXT pcontext, RECT* prcCurrent)
RECT rcPart;
int iPart, iState;
HICON hIcon;
WCHAR *CaptionText;
// See also win32ss/user/ntuser/nonclient.c!UserDrawCaptionBar
// and win32ss/user/ntuser/nonclient.c!UserDrawCaption
@@ -329,8 +342,6 @@ ThemeDrawCaption(PDRAW_CONTEXT pcontext, RECT* prcCurrent)
else
hIcon = NULL;
CaptionText = UserGetWindowCaption(pcontext->hWnd);
/* Get the caption part and state id */
if (pcontext->wi.dwStyle & WS_MINIMIZE)
iPart = WP_MINCAPTION;
@@ -378,11 +389,7 @@ ThemeDrawCaption(PDRAW_CONTEXT pcontext, RECT* prcCurrent)
rcPart.right -= 4;
/* Draw the caption */
if (CaptionText)
{
ThemeDrawCaptionText(pcontext, &rcPart, iPart, iState, CaptionText);
HeapFree(GetProcessHeap(), 0, CaptionText);
}
ThemeDrawCaptionText(pcontext, &rcPart, iPart, iState);
}
static void