121 lines
2.4 KiB
C++
121 lines
2.4 KiB
C++
// 9 april 2015
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#include "uipriv_windows.hpp"
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WCHAR *windowTextAndLen(HWND hwnd, LRESULT *len)
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{
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LRESULT n;
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WCHAR *text;
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n = SendMessageW(hwnd, WM_GETTEXTLENGTH, 0, 0);
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if (len != NULL)
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*len = n;
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// WM_GETTEXTLENGTH does not include the null terminator
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text = (WCHAR *) uiprivAlloc((n + 1) * sizeof (WCHAR), "WCHAR[]");
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// note the comparison: the size includes the null terminator, but the return does not
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if (GetWindowTextW(hwnd, text, n + 1) != n) {
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logLastError(L"error getting window text");
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// on error, return an empty string to be safe
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*text = L'\0';
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if (len != NULL)
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*len = 0;
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}
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return text;
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}
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WCHAR *windowText(HWND hwnd)
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{
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return windowTextAndLen(hwnd, NULL);
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}
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void setWindowText(HWND hwnd, WCHAR *wtext)
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{
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if (SetWindowTextW(hwnd, wtext) == 0)
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logLastError(L"error setting window text");
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}
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void uiFreeText(char *text)
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{
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uiprivFree(text);
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}
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int uiWindowsWindowTextWidth(HWND hwnd)
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{
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LRESULT 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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size.cx = 0;
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size.cy = 0;
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text = windowTextAndLen(hwnd, &len);
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if (len == 0) // no text; nothing to do
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goto noTextOrError;
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// now we can do the calculations
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dc = GetDC(hwnd);
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if (dc == NULL) {
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logLastError(L"error getting DC");
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// on any error, assume no text
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goto noTextOrError;
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}
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prevfont = (HFONT) SelectObject(dc, hMessageFont);
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if (prevfont == NULL) {
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logLastError(L"error loading control font into device context");
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ReleaseDC(hwnd, dc);
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goto noTextOrError;
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}
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if (GetTextExtentPoint32W(dc, text, len, &size) == 0) {
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logLastError(L"error getting text extent point");
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// continue anyway, assuming size is 0
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size.cx = 0;
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size.cy = 0;
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}
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// continue on errors; we got what we want
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if (SelectObject(dc, prevfont) != hMessageFont)
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logLastError(L"error restoring previous font into device context");
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if (ReleaseDC(hwnd, dc) == 0)
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logLastError(L"error releasing DC");
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uiprivFree(text);
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return size.cx;
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noTextOrError:
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uiprivFree(text);
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return 0;
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}
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char *uiWindowsWindowText(HWND hwnd)
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{
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WCHAR *wtext;
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char *text;
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wtext = windowText(hwnd);
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text = toUTF8(wtext);
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uiprivFree(wtext);
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return text;
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}
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void uiWindowsSetWindowText(HWND hwnd, const char *text)
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{
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WCHAR *wtext;
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wtext = toUTF16(text);
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setWindowText(hwnd, wtext);
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uiprivFree(wtext);
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}
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int uiprivStricmp(const char *a, const char *b)
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{
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WCHAR *wa, *wb;
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int ret;
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wa = toUTF16(a);
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wb = toUTF16(b);
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ret = _wcsicmp(wa, wb);
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uiprivFree(wb);
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uiprivFree(wa);
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return ret;
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}
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