C++ DocIterator::text方法代码示例

static bool equal(DocIterator & o, DocIterator & n)
{
	// Explicitly check for this, so we won't call
	// Paragraph::getChar for the last pos.
	bool const o_lastpos = o.pos() == o.lastpos();
	bool const n_lastpos = n.pos() == n.lastpos();
	if (o_lastpos || n_lastpos)
		return o_lastpos && n_lastpos;

	Paragraph const & old_par = o.text()->getPar(o.pit());
	Paragraph const & new_par = n.text()->getPar(n.pit());

	char_type const c_o = old_par.getChar(o.pos());
	char_type const c_n = new_par.getChar(n.pos());
	if (c_o != c_n)
		return false;

	if (old_par.isInset(o.pos())) {
		Inset const * i_o = old_par.getInset(o.pos());
		Inset const * i_n = new_par.getInset(n.pos());

		if (i_o && i_n)
			return equal(i_o, i_n);
	}

	Font fo = old_par.getFontSettings(o.buffer()->params(), o.pos());
	Font fn = new_par.getFontSettings(n.buffer()->params(), n.pos());
	return fo == fn;
}

void Undo::Private::doRecordUndo(UndoKind kind,
	DocIterator const & cell,
	pit_type first_pit, pit_type last_pit,
	CursorData const & cur_before,
	bool isFullBuffer,
	UndoElementStack & stack)
{
	if (!group_level) {
		LYXERR0("There is no group open (creating one)");
		++group_id;
	}

	if (first_pit > last_pit)
		swap(first_pit, last_pit);

	// Undo::ATOMIC are always recorded (no overlapping there).
	// As nobody wants all removed character appear one by one when undoing,
	// we want combine 'similar' non-ATOMIC undo recordings to one.
	pit_type from = first_pit;
	pit_type end = cell.lastpit() - last_pit;
	if (!undo_finished_
	    && kind != ATOMIC_UNDO
	    && !stack.empty()
	    && samePar(stack.top().cell, cell)
	    && stack.top().kind == kind
	    && stack.top().from == from
	    && stack.top().end == end) {
		// reset cur_after; it will be filled correctly by endUndoGroup.
		stack.top().cur_after = CursorData();
		return;
	}

	if (isFullBuffer)
		LYXERR(Debug::UNDO, "Create full buffer undo element of group " << group_id);
	else
		LYXERR(Debug::UNDO, "Create undo element of group " << group_id);
	// create the position information of the Undo entry
	UndoElement undo(kind, cur_before, cell, from, end, 0, 0,
	                 buffer_.params(), isFullBuffer, buffer_.isClean(), group_id);

	// fill in the real data to be saved
	if (cell.inMathed()) {
		// simply use the whole cell
		MathData & ar = cell.cell();
		undo.array = new MathData(ar.buffer(), ar.begin(), ar.end());
	} else {
		// some more effort needed here as 'the whole cell' of the
		// main Text _is_ the whole document.
		// record the relevant paragraphs
		Text const * text = cell.text();
		LBUFERR(text);
		ParagraphList const & plist = text->paragraphs();
		ParagraphList::const_iterator first = plist.begin();
		advance(first, first_pit);
		ParagraphList::const_iterator last = plist.begin();
		advance(last, last_pit + 1);
		undo.pars = new ParagraphList(first, last);
	}

	// push the undo entry to undo stack
	stack.push(undo);
	//lyxerr << "undo record: " << stack.top() << endl;
}