C++ DocIterator类代码示例

void InsetText::addToToc(DocIterator const & cdit, bool output_active,
						 UpdateType utype, TocBackend & backend) const
{
	DocIterator dit = cdit;
	dit.push_back(CursorSlice(const_cast<InsetText &>(*this)));
	iterateForToc(dit, output_active, utype, backend);
}

bool SpellcheckerWidget::Private::atLastPos(DocIterator const & cursor) const
{
	bool const valid_end = !end_.empty();
	return cursor.depth() <= 1 && (
		cursor.atEnd() ||
		(valid_end && isCurrentBuffer(cursor) && cursor >= end_));
}

void RowPainter::paintMisspelledMark(Row::Element const & e) const
{
	if (e.font.fontInfo().nospellcheck() == FONT_ON)
		return;
	// if changed the misspelled marker gets placed slightly lower than normal
	// to avoid drawing at the same vertical offset
	FontMetrics const & fm = theFontMetrics(e.font);
	int const thickness = max(fm.lineWidth(), 2);
	int const y = yo_ + pi_.base.solidLineOffset() + pi_.base.solidLineThickness()
		+ (e.change.changed() ? pi_.base.solidLineThickness() + 1 : 0)
		+ 1 + thickness / 2;

	//FIXME: this could be computed only once, it is probably not costly.
	// check for cursor position
	// don't draw misspelled marker for words at cursor position
	// we don't want to disturb the process of text editing
	DocIterator const nw = pi_.base.bv->cursor().newWord();
	pos_type cpos = -1;
	if (!nw.empty() && par_.id() == nw.paragraph().id()) {
		cpos = nw.pos();
		if (cpos > 0 && cpos == par_.size() && !par_.isWordSeparator(cpos-1))
			--cpos;
		else if (cpos > 0 && par_.isWordSeparator(cpos))
			--cpos;
	}

	pos_type pos = e.pos;
	while (pos < e.pos + pos_type(e.str.length())) {
		if (!par_.isMisspelled(pos)) {
			++pos;
			continue;
		}

		FontSpan const & range = par_.getSpellRange(pos);

		// Skip element which are being edited
		if (range.contains(cpos)) {
			// the range includes the last element
			pos = range.last + 1;
			continue;
		}

		int x1 = fm.pos2x(e.str, range.first - e.pos,
		                  e.isRTL(), e.extra);
		int x2 = fm.pos2x(e.str, min(range.last - e.pos + 1,
									 pos_type(e.str.length())),
									 e.isRTL(), e.extra);
		if (x1 > x2)
			swap(x1, x2);

		pi_.pain.line(int(x_ + x1), y, int(x_ + x2), y,
		              Color_error,
		              Painter::line_onoffdash, thickness);
		pos = range.last + 1;
	}
}

void InsetPreview::preparePreview(DocIterator const & pos) const  
{
	TexRow texrow;
	odocstringstream str;  
	otexstream os(str, texrow);
	OutputParams runparams(&pos.buffer()->params().encoding());
	latex(os, runparams);
	docstring const snippet = str.str();
	preview_->addPreview(snippet, *pos.buffer());  
}

void Row::setSelectionAndMargins(DocIterator const & beg, 
		DocIterator const & end) const
{
	setSelection(beg.pos(), end.pos());
	
	if (selection()) {
		end_margin_sel = isMarginSelected(false, beg, end);
		begin_margin_sel = isMarginSelected(true, beg, end);
	}
}

void MacroData::expand(vector<MathData> const & args, MathData & to) const
{
	updateData();

	// Hack. Any inset with a cell would do.
	static InsetMathSqrt inset(0);
	inset.setBuffer(const_cast<Buffer &>(*buffer_));

	// FIXME UNICODE
	asArray(display_.empty() ? definition_ : display_, inset.cell(0));
	//lyxerr << "MathData::expand: args: " << args << endl;
	//lyxerr << "MathData::expand: ar: " << inset.cell(0) << endl;
	for (DocIterator it = doc_iterator_begin(buffer_, &inset); it; it.forwardChar()) {
		if (!it.nextInset())
			continue;
		if (it.nextInset()->lyxCode() != MATH_MACROARG_CODE)
			continue;
		//it.cell().erase(it.pos());
		//it.cell().insert(it.pos(), it.nextInset()->asInsetMath()
		size_t n = static_cast<MathMacroArgument*>(it.nextInset())->number();
		if (n <= args.size()) {
			it.cell().erase(it.pos());
			it.cell().insert(it.pos(), args[n - 1]);
		}
	}
	//lyxerr << "MathData::expand: res: " << inset.cell(0) << endl;
	to = inset.cell(0);
}

void InsetBranch::addToToc(DocIterator const & cpit) const
{
	DocIterator pit = cpit;
	pit.push_back(CursorSlice(const_cast<InsetBranch &>(*this)));

	Toc & toc = buffer().tocBackend().toc("branch");
	docstring str = params_.branch + ": ";
	text().forToc(str, TOC_ENTRY_LENGTH);
	toc.push_back(TocItem(pit, 0, str, toolTipText(docstring(), 3, 60)));
	// Proceed with the rest of the inset.
	InsetCollapsable::addToToc(cpit);
}

void GuiSpellchecker::check()
{
	LYXERR(Debug::GUI, "Check the spelling of a word");

	DocIterator from = bufferview()->cursor();
	DocIterator to;
	WordLangTuple word_lang;
	docstring_list suggestions;

	int progress;
	try {
		progress = buffer().spellCheck(from, to, word_lang, suggestions);
	} catch (ExceptionMessage const & message) {
		if (message.type_ == WarningException) {
			Alert::warning(message.title_, message.details_);
			close();
			return;
		}
		throw message;
	}
	LYXERR(Debug::GUI, "Found word \"" << word_lang.word() << "\"");
	d->count_ += progress;
	d->progress_ += progress;

	// end of document
	if (from == doc_iterator_end(&buffer())) {
		showSummary();
		return;
	}
	if (!isVisible())
		show();

	d->word_ = word_lang;

	int const progress_bar = d->total_
		? int(100.0 * float(d->progress_)/d->total_) : 100;
	LYXERR(Debug::GUI, "Updating spell progress.");
	// set progress bar
	d->ui.spellcheckPR->setValue(progress_bar);
	// set suggestions
	updateSuggestions(suggestions);
	// set language
	int const pos = d->ui.languageCO->findData(toqstr(word_lang.lang()->lang()));
	if (pos != -1)
		d->ui.languageCO->setCurrentIndex(pos);

	// FIXME: if we used a lfun like in find/replace, dispatch would do
	// that for us
	int const size = to.pos() - from.pos();
	BufferView * bv = const_cast<BufferView *>(bufferview());
	bv->putSelectionAt(from, size, false);
}

void InsetText::iterateForToc(DocIterator const & cdit, bool output_active) const
{
	DocIterator dit = cdit;
	Toc & toc = buffer().tocBackend().toc("tableofcontents");

	BufferParams const & bufparams = buffer_->params();
	int const min_toclevel = bufparams.documentClass().min_toclevel();
	// we really should have done this before we got here, but it
	// can't hurt too much to do it again
	bool const doing_output = output_active && producesOutput();

	// For each paragraph, traverse its insets and let them add
	// their toc items
	ParagraphList const & pars = paragraphs();
	pit_type pend = paragraphs().size();
	for (pit_type pit = 0; pit != pend; ++pit) {
		Paragraph const & par = pars[pit];
		dit.pit() = pit;
		// if we find an optarg, we'll save it for use later.
		InsetText const * arginset = 0;
		InsetList::const_iterator it  = par.insetList().begin();
		InsetList::const_iterator end = par.insetList().end();
		for (; it != end; ++it) {
			Inset & inset = *it->inset;
			dit.pos() = it->pos;
			//lyxerr << (void*)&inset << " code: " << inset.lyxCode() << std::endl;
			inset.addToToc(dit, doing_output);
			if (inset.lyxCode() == ARG_CODE)
				arginset = inset.asInsetText();
		}
		// now the toc entry for the paragraph
		int const toclevel = text().getTocLevel(pit);
		if (toclevel != Layout::NOT_IN_TOC && toclevel >= min_toclevel) {
			// insert this into the table of contents
			docstring tocstring;
			int const length = doing_output ? INT_MAX : TOC_ENTRY_LENGTH;
			if (arginset) {
				tocstring = par.labelString();
				if (!tocstring.empty())
					tocstring += ' ';
				arginset->text().forToc(tocstring, length);
			} else
				par.forToc(tocstring, length);
			dit.pos() = 0;
			toc.push_back(TocItem(dit, toclevel - min_toclevel,
				tocstring, doing_output, tocstring));
		}
		
		// And now the list of changes.
		par.addChangesToToc(dit, buffer(), doing_output);
	}
}

void InsetNote::addToToc(DocIterator const & cpit) const
{
	DocIterator pit = cpit;
	pit.push_back(CursorSlice(const_cast<InsetNote &>(*this)));

	Toc & toc = buffer().tocBackend().toc("note");
	InsetLayout const & il = getLayout();
	docstring str = translateIfPossible(il.labelstring()) + from_ascii(": ");
	text().forToc(str, TOC_ENTRY_LENGTH);
	toc.push_back(TocItem(pit, 0, str, toolTipText(docstring(), 3, 60)));
	// Proceed with the rest of the inset.
	InsetCollapsable::addToToc(cpit);
}

bool Row::isMarginSelected(bool left_margin, DocIterator const & beg,
		DocIterator const & end) const
{
	pos_type const sel_pos = left_margin ? sel_beg : sel_end;
	pos_type const margin_pos = left_margin ? pos_ : end_;

	// Is the chosen margin selected ?
	if (sel_pos == margin_pos) {
		if (beg.pos() == end.pos())
			// This is a special case in which the space between after 
			// pos i-1 and before pos i is selected, i.e. the margins
			// (see DocIterator::boundary_).
			return beg.boundary() && !end.boundary();
		else if (end.pos() == margin_pos)
			// If the selection ends around the margin, it is only
			// drawn if the cursor is after the margin.
			return !end.boundary();
		else if (beg.pos() == margin_pos)
			// If the selection begins around the margin, it is 
			// only drawn if the cursor is before the margin.
			return beg.boundary();
		else 
			return true;
	}
	return false;
}

void InsetText::addToToc(DocIterator const & cdit) const
{
	DocIterator dit = cdit;
	dit.push_back(CursorSlice(const_cast<InsetText &>(*this)));
	Toc & toc = buffer().tocBackend().toc("tableofcontents");

	BufferParams const & bufparams = buffer_->params();
	int const min_toclevel = bufparams.documentClass().min_toclevel();

	// For each paragraph, traverse its insets and let them add
	// their toc items
	ParagraphList const & pars = paragraphs();
	pit_type pend = paragraphs().size();
	for (pit_type pit = 0; pit != pend; ++pit) {
		Paragraph const & par = pars[pit];
		dit.pit() = pit;
		// if we find an optarg, we'll save it for use later.
		InsetText const * arginset = 0;
		InsetList::const_iterator it  = par.insetList().begin();
		InsetList::const_iterator end = par.insetList().end();
		for (; it != end; ++it) {
			Inset & inset = *it->inset;
			dit.pos() = it->pos;
			//lyxerr << (void*)&inset << " code: " << inset.lyxCode() << std::endl;
			inset.addToToc(dit);
			if (inset.lyxCode() == ARG_CODE)
				arginset = inset.asInsetText();
		}
		// now the toc entry for the paragraph
		int const toclevel = par.layout().toclevel;
		if (toclevel != Layout::NOT_IN_TOC && toclevel >= min_toclevel) {
			// insert this into the table of contents
			docstring tocstring;
			if (arginset) {
				tocstring = par.labelString();
				if (!tocstring.empty())
					tocstring += ' ';
				arginset->text().forToc(tocstring, TOC_ENTRY_LENGTH);
			} else
				par.forToc(tocstring, TOC_ENTRY_LENGTH);
			dit.pos() = 0;
			toc.push_back(TocItem(dit, toclevel - min_toclevel,
				tocstring, tocstring));
		}
		
		// And now the list of changes.
		par.addChangesToToc(dit, buffer());
	}
}

void DocumentManager::onFileChanged( const QString & path )
{
    DocIterator it;
    for( it = mDocHash.begin(); it != mDocHash.end(); ++it )
    {
        Document *doc = it.value();
        if (doc->mFilePath == path) {
            QFileInfo info(doc->mFilePath);
            if (doc->mSaveTime < info.lastModified()) {
                doc->mDoc->setModified(true);
                emit changedExternally(doc);
            }
        }
    }
}

void DocumentManager::open( const QString & path, int initialCursorPosition, bool toRecent )
{
    QFileInfo info(path);
    QString cpath = info.canonicalFilePath();
    info.setFile(cpath);

    if (cpath.isEmpty()) {
        qWarning() << "DocumentManager: Can not open file: canonical path is empty.";
        return;
    }

    // Check if file already opened

    DocIterator it;
    for( it = mDocHash.begin(); it != mDocHash.end(); ++it )
    {
        Document *doc = it.value();
        if(doc->mFilePath == cpath) {
            Q_EMIT( showRequest(doc, initialCursorPosition) );
            if (toRecent) addToRecent(doc);
            return;
        }
    }

    // Open the file

    QFile file(cpath);
    if(!file.open(QIODevice::ReadOnly)) {
        qWarning() << "DocumentManager: the file" << cpath << "could not be opened for reading.";
        return;
    }
    QByteArray bytes( file.readAll() );
    file.close();

    Document *doc = new Document();
    doc->mDoc->setPlainText( QString::fromUtf8( bytes.data(), bytes.size() ) );
    doc->mDoc->setModified(false);
    doc->mFilePath = cpath;
    doc->mTitle = info.fileName();

    mDocHash.insert( doc->id(), doc );

    mFsWatcher.addPath(cpath);

    Q_EMIT( opened(doc, initialCursorPosition) );

    if (toRecent) this->addToRecent(doc);
}

void InsetCaption::addToToc(DocIterator const & cpit, bool output_active) const
{
	if (floattype_.empty())
		return;

	DocIterator pit = cpit;
	pit.push_back(CursorSlice(const_cast<InsetCaption &>(*this)));

	Toc & toc = buffer().tocBackend().toc(floattype_);
	docstring str = full_label_;
	int length = output_active ? INT_MAX : TOC_ENTRY_LENGTH;
	text().forToc(str, length);
	toc.push_back(TocItem(pit, 0, str, output_active));

	// Proceed with the rest of the inset.
	InsetText::addToToc(cpit, output_active);
}