Method ParseOptions

source/script_gui.cpp:4812–5162

ResultType GuiType::ParseOptions(LPTSTR aOptions, bool &aSetLastFoundWindow, ToggleValueType &aOwnDialogs)
// This function is similar to ControlParseOptions() further below, so should be maintained alongside it.
// Caller must have already initialized aSetLastFoundWindow/, bool &aOwnDialogs with desired starting values.
// Caller must ensure that aOptions is a modifiable string, since this method temporarily alters it.
{
	LONG nc_width, nc_height;

	if (mHwnd)
	{
		// Since window already exists, its mStyle and mExStyle members might be out-of-date due to
		// "WinSet Transparent", etc.  So update them:
		mStyle = GetWindowLong(mHwnd, GWL_STYLE);
		mExStyle = GetWindowLong(mHwnd, GWL_EXSTYLE);
	}
	DWORD style_orig = mStyle;
	DWORD exstyle_orig = mExStyle;

	LPTSTR pos_of_the_x, next_option, option_end;
	TCHAR orig_char;
	bool adding; // Whether this option is being added (+) or removed (-).

	for (next_option = aOptions; *next_option; next_option = omit_leading_whitespace(option_end))
	{
		if (*next_option == '-')
		{
			adding = false;
			// omit_leading_whitespace() is not called, which enforces the fact that the option word must
			// immediately follow the +/- sign.  This is done to allow the flexibility to have options
			// omit the plus/minus sign, and also to reserve more flexibility for future option formats.
			++next_option;  // Point it to the option word itself.
		}
		else
		{
			// Assume option is being added in the absence of either sign.  However, when we were
			// called by GuiControl(), the first option in the list must begin with +/- otherwise the cmd
			// would never have been properly detected as GUICONTROL_CMD_OPTIONS in the first place.
			adding = true;
			if (*next_option == '+')
				++next_option;  // Point it to the option word itself.
			//else do not increment, under the assumption that the plus has been omitted from a valid
			// option word and is thus an implicit plus.
		}

		if (!*next_option) // In case the entire option string ends in a naked + or -.
			break;
		// Find the end of this option item:
		if (   !(option_end = StrChrAny(next_option, _T(" \t")))   )  // Space or tab.
			option_end = next_option + _tcslen(next_option); // Set to position of zero terminator instead.
		if (option_end == next_option)
			continue; // i.e. the string contains a + or - with a space or tab after it, which is intentionally ignored.

		// Temporarily terminate to help eliminate ambiguity for words contained inside other words,
		// such as "Checked" inside of "CheckedGray":
		orig_char = *option_end;
		*option_end = '\0';

		// Attributes and option words: