C++ Row::endpos方法代码示例

bool ParagraphMetrics::hfillExpansion(Row const & row, pos_type pos) const
{
	if (!par_->isHfill(pos))
		return false;

	LASSERT(pos >= row.pos() && pos < row.endpos(), return false);

	// expand at the end of a row only if there is another hfill on the same row
	if (pos == row.endpos() - 1) {
		for (pos_type i = row.pos(); i < pos; i++) {
			if (par_->isHfill(i))
				return true;
		}
		return false;
	}

	// expand at the beginning of a row only if it is the first row of a paragraph
	if (pos == row.pos())
		return pos == 0;

	// do not expand in some labels
	if (par_->layout().margintype != MARGIN_MANUAL && pos < par_->beginOfBody())
		return false;

	// if there is anything between the first char of the row and
	// the specified position that is neither a newline nor an hfill,
	// the hfill will be expanded, otherwise it won't
	for (pos_type i = row.pos(); i < pos; i++) {
		if (!par_->isNewline(i) && !par_->isHfill(i))
			return true;
	}
	return false;
}

size_t ParagraphMetrics::computeRowSignature(Row const & row,
		BufferParams const & bparams) const
{
	boost::crc_32_type crc;
	for (pos_type i = row.pos(); i < row.endpos(); ++i) {
		char_type const b[] = { par_->getChar(i) };
		crc.process_bytes(b, sizeof(char_type));
		if (bparams.trackChanges) {
			Change change = par_->lookupChange(i);
			char_type const b[] = { static_cast<char_type>(change.type) };
			// 1 byte is enough to encode Change::Type
			crc.process_bytes(b, 1);
		}			
	}

	Dimension const & d = row.dimension();
	char_type const b[] = { static_cast<char_type>(row.sel_beg),
				static_cast<char_type>(row.sel_end),
		row.begin_margin_sel, row.end_margin_sel, d.wid, d.asc, d.des};
	crc.process_bytes(b, sizeof(b));

	return crc.checksum();
}

void Bidi::computeTables(Paragraph const & par,
	Buffer const & buf, Row const & row)
{
	same_direction_ = true;
	if (!lyxrc.rtl_support) {
		start_ = -1;
		return;
	}

	if (par.inInset().forceLTR()) {
		start_ = -1;
		return;
	}

	start_ = row.pos();
	end_ = row.endpos() - 1;

	if (start_ > end_) {
		start_ = -1;
		return;
	}

	if (end_ + 2 - start_ >
	    static_cast<pos_type>(log2vis_list_.size())) {
		pos_type new_size =
			(end_ + 2 - start_ < 500) ?
			500 : 2 * (end_ + 2 - start_);
		log2vis_list_.resize(new_size);
		vis2log_list_.resize(new_size);
		levels_.resize(new_size);
	}

	vis2log_list_[end_ + 1 - start_] = -1;
	log2vis_list_[end_ + 1 - start_] = -1;

	BufferParams const & bufparams = buf.params();
	pos_type stack[2];
	bool const rtl_par = par.isRTL(bufparams);
	int lev = 0;
	bool rtl = false;
	bool rtl0 = false;
	pos_type const body_pos = par.beginOfBody();

	for (pos_type lpos = start_; lpos <= end_; ++lpos) {
		bool is_space = false;
		// We do not handle spaces around an RTL segment in a special way anymore.
		// Neither do we do so when generating the LaTeX, so setting is_space
		// to false makes the view in the GUI consistent with the output of LaTeX 
		// later. The old setting was:
		//bool is_space = par.isLineSeparator(lpos);
		// FIXME: once we're sure that this is what we really want, we should just
		// get rid of this variable...
		pos_type const pos =
			(is_space && lpos + 1 <= end_ &&
			 !par.isLineSeparator(lpos + 1) &&
			 !par.isNewline(lpos + 1))
			? lpos + 1 : lpos;

		Font const * font = &(par.getFontSettings(bufparams, pos));
		if (pos != lpos && 0 < lpos && rtl0 && font->isRightToLeft() &&
		    font->fontInfo().number() == FONT_ON &&
		    par.getFontSettings(bufparams, lpos - 1).fontInfo().number()
		    == FONT_ON) {
			font = &(par.getFontSettings(bufparams, lpos));
			is_space = false;
		}
		bool new_rtl = font->isVisibleRightToLeft();
		bool new_rtl0 = font->isRightToLeft();

		int new_level;

		if (lpos == body_pos - 1
		    && row.pos() < body_pos - 1
		    && is_space) {
			new_level = rtl_par ? 1 : 0;
			new_rtl0 = rtl_par;
			new_rtl = rtl_par;
		} else if (new_rtl0) {
			new_level = new_rtl ? 1 : 2;
		} else {
			new_level = rtl_par ? 2 : 0;
		}

		if (is_space && new_level >= lev) {
			new_level = lev;
			new_rtl = rtl;
			new_rtl0 = rtl0;
		}

		int new_level2 = new_level;

		if (lev == new_level && rtl0 != new_rtl0) {
			--new_level2;
			log2vis_list_[lpos - start_] = rtl ? 1 : -1;
		} else if (lev < new_level) {
			log2vis_list_[lpos - start_] = rtl ? -1 : 1;
			if (new_level > 0 && !rtl_par)
				same_direction_ = false;
		} else {
			log2vis_list_[lpos - start_] = new_rtl ? -1 : 1;
//.........这里部分代码省略.........