-
-namespace {
- // an illegal tag for internal use
- static html::StartTag const parsep_tag("&LyX_parsep_tag&");
-}
-
-
-bool XHTMLStream::closeFontTags()
-{
- if (isTagPending(parsep_tag))
- // we haven't had any content
- return true;
-
- // this may be a useless check, since we ought at least to have
- // the parsep_tag. but it can't hurt too much to be careful.
- if (tag_stack_.empty())
- return true;
-
- // first, we close any open font tags we can close
- TagPtr curtag = tag_stack_.back();
- while (curtag->asFontTag()) {
- os_ << curtag->writeEndTag();
- tag_stack_.pop_back();
- // this shouldn't happen, since then the font tags
- // weren't in any other tag.
- LBUFERR(!tag_stack_.empty());
- curtag = tag_stack_.back();
- }
-
- if (*curtag == parsep_tag)
- return true;
-
- // so we've hit a non-font tag.
- writeError("Tags still open in closeFontTags(). Probably not a problem,\n"
- "but you might want to check these tags:");
- TagDeque::const_reverse_iterator it = tag_stack_.rbegin();
- TagDeque::const_reverse_iterator const en = tag_stack_.rend();
- for (; it != en; ++it) {
- if (**it == parsep_tag)
- break;
- writeError((*it)->tag_);
- }
- return false;
-}
-
-
-void XHTMLStream::startParagraph(bool keep_empty)
-{
- pending_tags_.push_back(makeTagPtr(html::StartTag(parsep_tag)));
- if (keep_empty)
- clearTagDeque();
-}
-
-
-void XHTMLStream::endParagraph()
-{
- if (isTagPending(parsep_tag)) {
- // this case is normal. it just means we didn't have content,
- // so the parsep_tag never got moved onto the tag stack.
- while (!pending_tags_.empty()) {
- // clear all pending tags up to and including the parsep tag.
- // note that we work from the back, because we want to get rid
- // of everything that hasn't been used.
- TagPtr const cur_tag = pending_tags_.back();
- pending_tags_.pop_back();
- if (*cur_tag == parsep_tag)
- break;
- }
- return;
- }
-
- if (!isTagOpen(parsep_tag)) {
- writeError("No paragraph separation tag found in endParagraph().");
- return;
- }
-
- // this case is also normal, if the parsep tag is the last one
- // on the stack. otherwise, it's an error.
- while (!tag_stack_.empty()) {
- TagPtr const cur_tag = tag_stack_.back();
- tag_stack_.pop_back();
- if (*cur_tag == parsep_tag)
- break;
- writeError("Tag `" + cur_tag->tag_ + "' still open at end of paragraph. Closing.");
- os_ << cur_tag->writeEndTag();
- }
-}
-
-
-void XHTMLStream::clearTagDeque()
-{
- while (!pending_tags_.empty()) {
- TagPtr const tag = pending_tags_.front();
- if (*tag != parsep_tag)
- // tabs?
- os_ << tag->writeTag();
- tag_stack_.push_back(tag);
- pending_tags_.pop_front();
- }
-}
-
-
-XHTMLStream & XHTMLStream::operator<<(docstring const & d)
-{
- clearTagDeque();
- os_ << html::htmlize(d, escape_);
- escape_ = ESCAPE_ALL;
- return *this;
-}
-
-
-XHTMLStream & XHTMLStream::operator<<(const char * s)
-{
- clearTagDeque();
- docstring const d = from_ascii(s);
- os_ << html::htmlize(d, escape_);
- escape_ = ESCAPE_ALL;
- return *this;
-}
-
-
-XHTMLStream & XHTMLStream::operator<<(char_type c)
-{
- clearTagDeque();
- os_ << html::escapeChar(c, escape_);
- escape_ = ESCAPE_ALL;
- return *this;
-}
-
-
-XHTMLStream & XHTMLStream::operator<<(char c)
-{
- clearTagDeque();
- string const d = html::escapeChar(c, escape_);
- escape_ = ESCAPE_ALL;
- return *this;
-}
-
-
-XHTMLStream & XHTMLStream::operator<<(int i)
-{
- clearTagDeque();
- os_ << i;
- escape_ = ESCAPE_ALL;
- return *this;
-}
-
-
-XHTMLStream & XHTMLStream::operator<<(EscapeSettings e)
-{
- escape_ = e;
- return *this;
-}
-
-
-XHTMLStream & XHTMLStream::operator<<(html::StartTag const & tag)
-{
- if (tag.tag_.empty())
- return *this;
- pending_tags_.push_back(makeTagPtr(tag));
- if (tag.keepempty_)
- clearTagDeque();
- return *this;
-}
-
-
-XHTMLStream & XHTMLStream::operator<<(html::ParTag const & tag)
-{
- if (tag.tag_.empty())
- return *this;
- pending_tags_.push_back(makeTagPtr(tag));
- return *this;
-}
-
-
-XHTMLStream & XHTMLStream::operator<<(html::CompTag const & tag)
-{
- if (tag.tag_.empty())
- return *this;
- clearTagDeque();
- os_ << tag.writeTag();
- *this << html::CR();
- return *this;
-}
-
-
-XHTMLStream & XHTMLStream::operator<<(html::FontTag const & tag)
-{
- if (tag.tag_.empty())
- return *this;
- pending_tags_.push_back(makeTagPtr(tag));
- return *this;
-}
-
-
-XHTMLStream & XHTMLStream::operator<<(html::CR const &)
-{
- // tabs?
- os_ << from_ascii("\n");
- return *this;
-}
-
-
-bool XHTMLStream::isTagOpen(html::StartTag const & stag) const
-{
- TagDeque::const_iterator sit = tag_stack_.begin();
- TagDeque::const_iterator const sen = tag_stack_.end();
- for (; sit != sen; ++sit)
- if (**sit == stag)
- return true;
- return false;
-}
-
-
-bool XHTMLStream::isTagOpen(html::EndTag const & etag) const
-{
- TagDeque::const_iterator sit = tag_stack_.begin();
- TagDeque::const_iterator const sen = tag_stack_.end();
- for (; sit != sen; ++sit)
- if (etag == **sit)
- return true;
- return false;
-}
-
-
-bool XHTMLStream::isTagPending(html::StartTag const & stag) const
-{
- TagDeque::const_iterator sit = pending_tags_.begin();
- TagDeque::const_iterator const sen = pending_tags_.end();
- for (; sit != sen; ++sit)
- if (**sit == stag)
- return true;
- return false;
-}
-
-
-// this is complicated, because we want to make sure that
-// everything is properly nested. the code ought to make
-// sure of that, but we won't assert (yet) if we run into
-// a problem. we'll just output error messages and try our
-// best to make things work.
-XHTMLStream & XHTMLStream::operator<<(html::EndTag const & etag)
-{
- if (etag.tag_.empty())
- return *this;
-
- // if this tag is pending, we can simply discard it.
- if (!pending_tags_.empty()) {
-
- if (etag == *pending_tags_.back()) {
- // we have <tag></tag>, so we discard it and remove it
- // from the pending_tags_.
- pending_tags_.pop_back();
- return *this;
- }
-
- // there is a pending tag that isn't the one we are trying
- // to close.
-
- // is this tag itself pending?
- // non-const iterators because we may call erase().
- TagDeque::iterator dit = pending_tags_.begin();
- TagDeque::iterator const den = pending_tags_.end();
- for (; dit != den; ++dit) {
- if (etag == **dit) {
- // it was pending, so we just erase it
- writeError("Tried to close pending tag `" + etag.tag_
- + "' when other tags were pending. Last pending tag is `"
- + to_utf8(pending_tags_.back()->writeTag())
- + "'. Tag discarded.");
- pending_tags_.erase(dit);
- return *this;
- }
- }
- // so etag isn't itself pending. is it even open?
- if (!isTagOpen(etag)) {
- writeError("Tried to close `" + etag.tag_
- + "' when tag was not open. Tag discarded.");
- return *this;
- }
- // ok, so etag is open.
- // our strategy will be as below: we will do what we need to
- // do to close this tag.
- string estr = "Closing tag `" + etag.tag_
- + "' when other tags are pending. Discarded pending tags:\n";
- for (dit = pending_tags_.begin(); dit != den; ++dit)
- estr += to_utf8(html::htmlize((*dit)->writeTag(), XHTMLStream::ESCAPE_ALL)) + "\n";
- writeError(estr);
- // clear the pending tags...
- pending_tags_.clear();
- // ...and then just fall through.
- }
-
- // make sure there are tags to be closed
- if (tag_stack_.empty()) {
- writeError("Tried to close `" + etag.tag_
- + "' when no tags were open!");
- return *this;
- }
-
- // is the tag we are closing the last one we opened?
- if (etag == *tag_stack_.back()) {
- // output it...
- os_ << etag.writeEndTag();
- // ...and forget about it
- tag_stack_.pop_back();
- return *this;
- }
-
- // we are trying to close a tag other than the one last opened.
- // let's first see if this particular tag is still open somehow.
- if (!isTagOpen(etag)) {
- writeError("Tried to close `" + etag.tag_
- + "' when tag was not open. Tag discarded.");
- return *this;
- }
-
- // so the tag was opened, but other tags have been opened since
- // and not yet closed.
- // if it's a font tag, though...
- if (etag.asFontTag()) {
- // it won't be a problem if the other tags open since this one
- // are also font tags.
- TagDeque::const_reverse_iterator rit = tag_stack_.rbegin();
- TagDeque::const_reverse_iterator ren = tag_stack_.rend();
- for (; rit != ren; ++rit) {
- if (etag == **rit)
- break;
- if (!(*rit)->asFontTag()) {
- // we'll just leave it and, presumably, have to close it later.
- writeError("Unable to close font tag `" + etag.tag_
- + "' due to open non-font tag `" + (*rit)->tag_ + "'.");
- return *this;
- }
- }
-
- // so we have e.g.:
- // <em>this is <strong>bold
- // and are being asked to closed em. we want:
- // <em>this is <strong>bold</strong></em><strong>
- // first, we close the intervening tags...
- TagPtr curtag = tag_stack_.back();
- // ...remembering them in a stack.
- TagDeque fontstack;
- while (etag != *curtag) {
- os_ << curtag->writeEndTag();
- fontstack.push_back(curtag);
- tag_stack_.pop_back();
- curtag = tag_stack_.back();
- }
- os_ << etag.writeEndTag();
- tag_stack_.pop_back();
-
- // ...and restore the other tags.
- rit = fontstack.rbegin();
- ren = fontstack.rend();
- for (; rit != ren; ++rit)
- pending_tags_.push_back(*rit);
- return *this;
- }
-
- // it wasn't a font tag.
- // so other tags were opened before this one and not properly closed.
- // so we'll close them, too. that may cause other issues later, but it
- // at least guarantees proper nesting.
- writeError("Closing tag `" + etag.tag_
- + "' when other tags are open, namely:");
- TagPtr curtag = tag_stack_.back();
- while (etag != *curtag) {
- writeError(curtag->tag_);
- if (*curtag != parsep_tag)
- os_ << curtag->writeEndTag();
- tag_stack_.pop_back();
- curtag = tag_stack_.back();
- }
- // curtag is now the one we actually want.
- os_ << curtag->writeEndTag();
- tag_stack_.pop_back();
-
- return *this;
-}
-
-// End code for XHTMLStream
-