51 lines
1.7 KiB
C
51 lines
1.7 KiB
C
// 6 april 2015
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#include "uipriv_windows.h"
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#define MBTWC(str, wstr, bufsiz) MultiByteToWideChar(CP_UTF8, 0, str, -1, wstr, bufsiz)
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WCHAR *toUTF16(const char *str)
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{
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WCHAR *wstr;
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int n;
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n = MBTWC(str, NULL, 0);
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if (n == 0)
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logLastError("error figuring out number of characters to convert to in toUTF16()");
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wstr = (WCHAR *) uiAlloc(n * sizeof (WCHAR));
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if (MBTWC(str, wstr, n) != n)
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logLastError("error converting from UTF-8 to UTF-16 in toUTF16()");
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return wstr;
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}
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// TODO this and resize(): initialize size and other values to avoid garbage on failure
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intmax_t uiWindowsWindowTextWidth(HWND hwnd)
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{
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int len;
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WCHAR *text;
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HDC dc;
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HFONT prevfont;
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SIZE size;
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// TODO check for error
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len = GetWindowTextLengthW(hwnd);
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if (len == 0) // no text; nothing to do
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return 0;
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text = (WCHAR *) uiAlloc((len + 1) * sizeof (WCHAR));
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if (GetWindowText(hwnd, text, len + 1) == 0) // should only happen on error given explicit test for len == 0 above
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logLastError("error getting window text in uiWindowsWindowTextWidth()");
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dc = GetDC(hwnd);
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if (dc == NULL)
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logLastError("error getting DC in uiWindowsWindowTextWidth()");
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prevfont = (HFONT) SelectObject(dc, hMessageFont);
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if (prevfont == NULL)
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logLastError("error loading control font into device context in uiWindowsWindowTextWidth()");
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if (GetTextExtentPoint32W(dc, text, len, &size) == 0)
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logLastError("error getting text extent point in uiWindowsWindowTextWidth()");
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if (SelectObject(dc, prevfont) != hMessageFont)
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logLastError("error restoring previous font into device context in uiWindowsWindowTextWidth()");
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if (ReleaseDC(hwnd, dc) == 0)
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logLastError("error releasing DC in uiWindowsWindowTextWidth()");
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uiFree(text);
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return size.cx;
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}
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