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git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@17828 a592a061-630c-0410-9148-cb99ea01b6c8
838 lines
20 KiB
C
838 lines
20 KiB
C
/**
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* \file paragraph_pimpl.C
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* This file is part of LyX, the document processor.
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* Licence details can be found in the file COPYING.
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*
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* \author Lars Gullik Bjønnes
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* \author Jean-Marc Lasgouttes
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* \author John Levon
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* \author André Pönitz
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*
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* Full author contact details are available in file CREDITS.
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*/
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#include <config.h>
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#include "paragraph_pimpl.h"
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#include "paragraph.h"
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#include "bufferparams.h"
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#include "debug.h"
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#include "encoding.h"
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#include "language.h"
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#include "LaTeXFeatures.h"
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#include "LColor.h"
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#include "lyxlength.h"
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#include "lyxrc.h"
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#include "outputparams.h"
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#include "texrow.h"
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#include <boost/next_prior.hpp>
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namespace lyx {
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using std::endl;
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using std::upper_bound;
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using std::lower_bound;
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using std::string;
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// Initialization of the counter for the paragraph id's,
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unsigned int Paragraph::Pimpl::paragraph_id = 0;
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namespace {
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struct special_phrase {
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string phrase;
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docstring macro;
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bool builtin;
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};
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special_phrase const special_phrases[] = {
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{ "LyX", from_ascii("\\LyX{}"), false },
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{ "TeX", from_ascii("\\TeX{}"), true },
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{ "LaTeX2e", from_ascii("\\LaTeXe{}"), true },
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{ "LaTeX", from_ascii("\\LaTeX{}"), true },
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};
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size_t const phrases_nr = sizeof(special_phrases)/sizeof(special_phrase);
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} // namespace anon
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Paragraph::Pimpl::Pimpl(Paragraph * owner)
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: owner_(owner)
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{
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inset_owner = 0;
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id_ = paragraph_id++;
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}
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Paragraph::Pimpl::Pimpl(Pimpl const & p, Paragraph * owner)
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: params(p.params), changes_(p.changes_), owner_(owner)
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{
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inset_owner = p.inset_owner;
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fontlist = p.fontlist;
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id_ = paragraph_id++;
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}
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bool Paragraph::Pimpl::isChanged(pos_type start, pos_type end) const
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{
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BOOST_ASSERT(start >= 0 && start <= size());
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BOOST_ASSERT(end > start && end <= size() + 1);
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return changes_.isChanged(start, end);
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}
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bool Paragraph::Pimpl::isMergedOnEndOfParDeletion(bool trackChanges) const {
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// keep the logic here in sync with the logic of eraseChars()
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if (!trackChanges) {
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return true;
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}
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Change change = changes_.lookup(size());
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return change.type == Change::INSERTED && change.author == 0;
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}
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void Paragraph::Pimpl::setChange(Change const & change)
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{
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// beware of the imaginary end-of-par character!
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changes_.set(change, 0, size() + 1);
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/*
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* Propagate the change recursively - but not in case of DELETED!
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*
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* Imagine that your co-author makes changes in an existing inset. He
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* sends your document to you and you come to the conclusion that the
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* inset should go completely. If you erase it, LyX must not delete all
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* text within the inset. Otherwise, the change tracked insertions of
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* your co-author get lost and there is no way to restore them later.
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*
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* Conclusion: An inset's content should remain untouched if you delete it
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*/
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if (change.type != Change::DELETED) {
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for (pos_type pos = 0; pos < size(); ++pos) {
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if (owner_->isInset(pos)) {
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owner_->getInset(pos)->setChange(change);
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}
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}
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}
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}
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void Paragraph::Pimpl::setChange(pos_type pos, Change const & change)
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{
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BOOST_ASSERT(pos >= 0 && pos <= size());
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changes_.set(change, pos);
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// see comment in setChange(Change const &) above
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if (change.type != Change::DELETED &&
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pos < size() && owner_->isInset(pos)) {
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owner_->getInset(pos)->setChange(change);
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}
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}
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Change const & Paragraph::Pimpl::lookupChange(pos_type pos) const
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{
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BOOST_ASSERT(pos >= 0 && pos <= size());
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return changes_.lookup(pos);
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}
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void Paragraph::Pimpl::acceptChanges(BufferParams const & bparams, pos_type start, pos_type end)
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{
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BOOST_ASSERT(start >= 0 && start <= size());
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BOOST_ASSERT(end > start && end <= size() + 1);
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for (pos_type pos = start; pos < end; ++pos) {
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switch (lookupChange(pos).type) {
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case Change::UNCHANGED:
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// accept changes in nested inset
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if (pos < size() && owner_->isInset(pos)) {
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owner_->getInset(pos)->acceptChanges(bparams);
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}
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break;
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case Change::INSERTED:
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changes_.set(Change(Change::UNCHANGED), pos);
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// also accept changes in nested inset
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if (pos < size() && owner_->isInset(pos)) {
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owner_->getInset(pos)->acceptChanges(bparams);
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}
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break;
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case Change::DELETED:
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// Suppress access to non-existent
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// "end-of-paragraph char"
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if (pos < size()) {
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eraseChar(pos, false);
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--end;
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--pos;
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}
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break;
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}
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}
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}
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void Paragraph::Pimpl::rejectChanges(BufferParams const & bparams, pos_type start, pos_type end)
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{
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BOOST_ASSERT(start >= 0 && start <= size());
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BOOST_ASSERT(end > start && end <= size() + 1);
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for (pos_type pos = start; pos < end; ++pos) {
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switch (lookupChange(pos).type) {
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case Change::UNCHANGED:
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// reject changes in nested inset
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if (pos < size() && owner_->isInset(pos)) {
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owner_->getInset(pos)->rejectChanges(bparams);
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}
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break;
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case Change::INSERTED:
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// Suppress access to non-existent
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// "end-of-paragraph char"
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if (pos < size()) {
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eraseChar(pos, false);
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--end;
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--pos;
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}
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break;
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case Change::DELETED:
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changes_.set(Change(Change::UNCHANGED), pos);
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// Do NOT reject changes within a deleted inset!
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// There may be insertions of a co-author inside of it!
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break;
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}
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}
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}
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Paragraph::value_type Paragraph::Pimpl::getChar(pos_type pos) const
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{
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BOOST_ASSERT(pos >= 0 && pos <= size());
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return owner_->getChar(pos);
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}
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void Paragraph::Pimpl::insertChar(pos_type pos, value_type c, Change const & change)
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{
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BOOST_ASSERT(pos >= 0 && pos <= size());
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// track change
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changes_.insert(change, pos);
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// This is actually very common when parsing buffers (and
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// maybe inserting ascii text)
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if (pos == size()) {
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// when appending characters, no need to update tables
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owner_->text_.push_back(c);
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return;
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}
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owner_->text_.insert(owner_->text_.begin() + pos, c);
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// Update the font table.
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FontTable search_font(pos, LyXFont());
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for (FontList::iterator it
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= lower_bound(fontlist.begin(), fontlist.end(), search_font, matchFT());
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it != fontlist.end(); ++it)
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{
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it->pos(it->pos() + 1);
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}
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// Update the insets
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owner_->insetlist.increasePosAfterPos(pos);
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}
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void Paragraph::Pimpl::insertInset(pos_type pos, InsetBase * inset,
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Change const & change)
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{
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BOOST_ASSERT(inset);
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BOOST_ASSERT(pos >= 0 && pos <= size());
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insertChar(pos, META_INSET, change);
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BOOST_ASSERT(owner_->text_[pos] == META_INSET);
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// Add a new entry in the insetlist.
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owner_->insetlist.insert(inset, pos);
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}
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bool Paragraph::Pimpl::eraseChar(pos_type pos, bool trackChanges)
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{
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BOOST_ASSERT(pos >= 0 && pos <= size());
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// keep the logic here in sync with the logic of isMergedOnEndOfParDeletion()
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if (trackChanges) {
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Change change = changes_.lookup(pos);
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// set the character to DELETED if
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// a) it was previously unchanged or
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// b) it was inserted by a co-author
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if (change.type == Change::UNCHANGED ||
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(change.type == Change::INSERTED && change.author != 0)) {
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setChange(pos, Change(Change::DELETED));
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return false;
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}
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if (change.type == Change::DELETED)
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return false;
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}
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// Don't physically access the imaginary end-of-paragraph character.
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// eraseChar() can only mark it as DELETED. A physical deletion of
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// end-of-par must be handled externally.
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if (pos == size()) {
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return false;
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}
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// track change
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changes_.erase(pos);
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// if it is an inset, delete the inset entry
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if (owner_->text_[pos] == Paragraph::META_INSET) {
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owner_->insetlist.erase(pos);
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}
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owner_->text_.erase(owner_->text_.begin() + pos);
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// Erase entries in the tables.
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FontTable search_font(pos, LyXFont());
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FontList::iterator it =
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lower_bound(fontlist.begin(),
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fontlist.end(),
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search_font, matchFT());
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if (it != fontlist.end() && it->pos() == pos &&
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(pos == 0 ||
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(it != fontlist.begin()
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&& boost::prior(it)->pos() == pos - 1))) {
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// If it is a multi-character font
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// entry, we just make it smaller
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// (see update below), otherwise we
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// should delete it.
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unsigned int const i = it - fontlist.begin();
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fontlist.erase(fontlist.begin() + i);
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it = fontlist.begin() + i;
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if (i > 0 && i < fontlist.size() &&
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fontlist[i - 1].font() == fontlist[i].font()) {
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fontlist.erase(fontlist.begin() + i - 1);
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it = fontlist.begin() + i - 1;
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}
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}
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// Update all other entries
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FontList::iterator fend = fontlist.end();
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for (; it != fend; ++it)
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it->pos(it->pos() - 1);
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// Update the insetlist
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owner_->insetlist.decreasePosAfterPos(pos);
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return true;
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}
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int Paragraph::Pimpl::eraseChars(pos_type start, pos_type end, bool trackChanges)
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{
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BOOST_ASSERT(start >= 0 && start <= size());
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BOOST_ASSERT(end >= start && end <= size() + 1);
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pos_type i = start;
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for (pos_type count = end - start; count; --count) {
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if (!eraseChar(i, trackChanges))
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++i;
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}
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return end - i;
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}
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int Paragraph::Pimpl::latexSurrogatePair(odocstream & os, value_type c,
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value_type next, Encoding const & encoding)
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{
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// Writing next here may circumvent a possible font change between
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// c and next. Since next is only output if it forms a surrogate pair
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// with c we can ignore this:
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// A font change inside a surrogate pair does not make sense and is
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// hopefully impossible to input.
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// FIXME: change tracking
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// Is this correct WRT change tracking?
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docstring const latex1 = encoding.latexChar(next);
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docstring const latex2 = encoding.latexChar(c);
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os << latex1 << '{' << latex2 << '}';
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return latex1.length() + latex2.length() + 2;
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}
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bool Paragraph::Pimpl::simpleTeXBlanks(Encoding const & encoding,
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odocstream & os, TexRow & texrow,
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pos_type & i,
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unsigned int & column,
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LyXFont const & font,
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LyXLayout const & style)
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{
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if (style.pass_thru)
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return false;
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if (i < size() - 1) {
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char_type next = getChar(i + 1);
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if (Encodings::isCombiningChar(next)) {
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// This space has an accent, so we must always output it.
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column += latexSurrogatePair(os, ' ', next, encoding) - 1;
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++i;
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return true;
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}
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}
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if (lyxrc.plaintext_linelen > 0
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&& column > lyxrc.plaintext_linelen
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&& i
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&& getChar(i - 1) != ' '
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&& (i < size() - 1)
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// same in FreeSpacing mode
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&& !owner_->isFreeSpacing()
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// In typewriter mode, we want to avoid
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// ! . ? : at the end of a line
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&& !(font.family() == LyXFont::TYPEWRITER_FAMILY
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&& (getChar(i - 1) == '.'
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|| getChar(i - 1) == '?'
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|| getChar(i - 1) == ':'
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|| getChar(i - 1) == '!'))) {
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os << '\n';
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texrow.newline();
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texrow.start(owner_->id(), i + 1);
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column = 0;
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} else if (style.free_spacing) {
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os << '~';
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} else {
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os << ' ';
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}
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return false;
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}
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bool Paragraph::Pimpl::isTextAt(string const & str, pos_type pos) const
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{
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pos_type const len = str.length();
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// is the paragraph large enough?
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if (pos + len > size())
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return false;
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// does the wanted text start at point?
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for (string::size_type i = 0; i < str.length(); ++i) {
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// Caution: direct comparison of characters works only
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// because str is pure ASCII.
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if (str[i] != owner_->text_[pos + i])
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return false;
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}
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// is there a font change in middle of the word?
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FontList::const_iterator cit = fontlist.begin();
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FontList::const_iterator end = fontlist.end();
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for (; cit != end; ++cit) {
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if (cit->pos() >= pos)
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break;
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}
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if (cit != end && pos + len - 1 > cit->pos())
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return false;
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return true;
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}
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void Paragraph::Pimpl::simpleTeXSpecialChars(Buffer const & buf,
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BufferParams const & bparams,
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odocstream & os,
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TexRow & texrow,
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OutputParams const & runparams,
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LyXFont & running_font,
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LyXFont & basefont,
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LyXFont const & outerfont,
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bool & open_font,
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Change::Type & running_change,
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LyXLayout const & style,
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pos_type & i,
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unsigned int & column,
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value_type const c)
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{
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if (style.pass_thru) {
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if (c != Paragraph::META_INSET) {
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if (c != '\0')
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// FIXME UNICODE: This can fail if c cannot
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// be encoded in the current encoding.
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os.put(c);
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} else
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owner_->getInset(i)->plaintext(buf, os, runparams);
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return;
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}
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// Two major modes: LaTeX or plain
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// Handle here those cases common to both modes
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// and then split to handle the two modes separately.
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switch (c) {
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case Paragraph::META_INSET: {
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InsetBase * inset = owner_->getInset(i);
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// FIXME: remove this check
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if (!inset)
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break;
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// FIXME: move this to InsetNewline::latex
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if (inset->lyxCode() == InsetBase::NEWLINE_CODE) {
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// newlines are handled differently here than
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// the default in simpleTeXSpecialChars().
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if (!style.newline_allowed) {
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os << '\n';
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} else {
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if (open_font) {
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column += running_font.latexWriteEndChanges(
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os, basefont, basefont);
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open_font = false;
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}
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if (running_font.family() == LyXFont::TYPEWRITER_FAMILY)
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os << '~';
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basefont = owner_->getLayoutFont(bparams, outerfont);
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running_font = basefont;
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if (runparams.moving_arg)
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os << "\\protect ";
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os << "\\\\\n";
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}
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texrow.newline();
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texrow.start(owner_->id(), i + 1);
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column = 0;
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break;
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}
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// output change tracking marks only if desired,
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// if dvipost is installed,
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// and with dvi/ps (other formats don't work)
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LaTeXFeatures features(buf, bparams, runparams);
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bool const output = bparams.outputChanges
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&& runparams.flavor == OutputParams::LATEX
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&& features.isAvailable("dvipost");
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if (inset->canTrackChanges()) {
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column += Changes::latexMarkChange(os, running_change,
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Change::UNCHANGED, output);
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running_change = Change::UNCHANGED;
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}
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bool close = false;
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odocstream::pos_type const len = os.tellp();
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if ((inset->lyxCode() == InsetBase::GRAPHICS_CODE
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|| inset->lyxCode() == InsetBase::MATH_CODE
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|| inset->lyxCode() == InsetBase::URL_CODE)
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&& running_font.isRightToLeft()) {
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os << "\\L{";
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close = true;
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}
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#ifdef WITH_WARNINGS
|
||
#warning Bug: we can have an empty font change here!
|
||
// if there has just been a font change, we are going to close it
|
||
// right now, which means stupid latex code like \textsf{}. AFAIK,
|
||
// this does not harm dvi output. A minor bug, thus (JMarc)
|
||
#endif
|
||
// some insets cannot be inside a font change command
|
||
if (open_font && inset->noFontChange()) {
|
||
column += running_font.latexWriteEndChanges(
|
||
os, basefont, basefont);
|
||
open_font = false;
|
||
basefont = owner_->getLayoutFont(bparams, outerfont);
|
||
running_font = basefont;
|
||
}
|
||
|
||
int tmp = inset->latex(buf, os, runparams);
|
||
|
||
if (close)
|
||
os << '}';
|
||
|
||
if (tmp) {
|
||
for (int j = 0; j < tmp; ++j) {
|
||
texrow.newline();
|
||
}
|
||
texrow.start(owner_->id(), i + 1);
|
||
column = 0;
|
||
} else {
|
||
column += os.tellp() - len;
|
||
}
|
||
}
|
||
break;
|
||
|
||
default:
|
||
// And now for the special cases within each mode
|
||
|
||
switch (c) {
|
||
case '\\':
|
||
os << "\\textbackslash{}";
|
||
column += 15;
|
||
break;
|
||
|
||
// The following characters could be written literally in latin1, but they
|
||
// would be wrongly converted on systems where char is signed, so we give
|
||
// the code points.
|
||
// This also makes us independant from the encoding of this source file.
|
||
case '|': case '<': case '>':
|
||
// In T1 encoding, these characters exist
|
||
if (lyxrc.fontenc == "T1") {
|
||
os.put(c);
|
||
//... but we should avoid ligatures
|
||
if ((c == '>' || c == '<')
|
||
&& i <= size() - 2
|
||
&& getChar(i + 1) == c) {
|
||
//os << "\\textcompwordmark{}";
|
||
//column += 19;
|
||
// Jean-Marc, have a look at
|
||
// this. I think this works
|
||
// equally well:
|
||
os << "\\,{}";
|
||
// Lgb
|
||
column += 3;
|
||
}
|
||
break;
|
||
}
|
||
// Typewriter font also has them
|
||
if (running_font.family() == LyXFont::TYPEWRITER_FAMILY) {
|
||
os.put(c);
|
||
break;
|
||
}
|
||
// Otherwise, we use what LaTeX
|
||
// provides us.
|
||
switch (c) {
|
||
case '<':
|
||
os << "\\textless{}";
|
||
column += 10;
|
||
break;
|
||
case '>':
|
||
os << "\\textgreater{}";
|
||
column += 13;
|
||
break;
|
||
case '|':
|
||
os << "\\textbar{}";
|
||
column += 9;
|
||
break;
|
||
}
|
||
break;
|
||
|
||
case '-': // "--" in Typewriter mode -> "-{}-"
|
||
if (i <= size() - 2 &&
|
||
getChar(i + 1) == '-' &&
|
||
running_font.family() == LyXFont::TYPEWRITER_FAMILY) {
|
||
os << "-{}";
|
||
column += 2;
|
||
} else {
|
||
os << '-';
|
||
}
|
||
break;
|
||
|
||
case '\"':
|
||
os << "\\char`\\\"{}";
|
||
column += 9;
|
||
break;
|
||
|
||
case '$': case '&':
|
||
case '%': case '#': case '{':
|
||
case '}': case '_':
|
||
os << '\\';
|
||
os.put(c);
|
||
column += 1;
|
||
break;
|
||
|
||
case '~':
|
||
os << "\\textasciitilde{}";
|
||
column += 16;
|
||
break;
|
||
|
||
case '^':
|
||
os << "\\textasciicircum{}";
|
||
column += 17;
|
||
break;
|
||
|
||
case '*': case '[':
|
||
// avoid being mistaken for optional arguments
|
||
os << '{';
|
||
os.put(c);
|
||
os << '}';
|
||
column += 2;
|
||
break;
|
||
|
||
case ' ':
|
||
// Blanks are printed before font switching.
|
||
// Sure? I am not! (try nice-latex)
|
||
// I am sure it's correct. LyX might be smarter
|
||
// in the future, but for now, nothing wrong is
|
||
// written. (Asger)
|
||
break;
|
||
|
||
default:
|
||
|
||
// I assume this is hack treating typewriter as verbatim
|
||
// FIXME UNICODE: This can fail if c cannot be encoded
|
||
// in the current encoding.
|
||
if (running_font.family() == LyXFont::TYPEWRITER_FAMILY) {
|
||
if (c != '\0') {
|
||
os.put(c);
|
||
}
|
||
break;
|
||
}
|
||
|
||
// LyX, LaTeX etc.
|
||
|
||
// FIXME: if we have "LaTeX" with a font
|
||
// change in the middle (before the 'T', then
|
||
// the "TeX" part is still special cased.
|
||
// Really we should only operate this on
|
||
// "words" for some definition of word
|
||
|
||
size_t pnr = 0;
|
||
|
||
for (; pnr < phrases_nr; ++pnr) {
|
||
if (isTextAt(special_phrases[pnr].phrase, i)) {
|
||
os << special_phrases[pnr].macro;
|
||
i += special_phrases[pnr].phrase.length() - 1;
|
||
column += special_phrases[pnr].macro.length() - 1;
|
||
break;
|
||
}
|
||
}
|
||
|
||
if (pnr == phrases_nr && c != '\0') {
|
||
Encoding const & encoding = *(runparams.encoding);
|
||
if (i < size() - 1) {
|
||
char_type next = getChar(i + 1);
|
||
if (Encodings::isCombiningChar(next)) {
|
||
column += latexSurrogatePair(os, c, next, encoding) - 1;
|
||
++i;
|
||
break;
|
||
}
|
||
}
|
||
docstring const latex = encoding.latexChar(c);
|
||
if (latex.length() > 1 &&
|
||
latex[latex.length() - 1] != '}') {
|
||
// Prevent eating of a following
|
||
// space or command corruption by
|
||
// following characters
|
||
column += latex.length() + 1;
|
||
os << latex << "{}";
|
||
} else {
|
||
column += latex.length() - 1;
|
||
os << latex;
|
||
}
|
||
}
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
|
||
|
||
void Paragraph::Pimpl::validate(LaTeXFeatures & features,
|
||
LyXLayout const & layout) const
|
||
{
|
||
BufferParams const & bparams = features.bufferParams();
|
||
|
||
// check the params.
|
||
if (!params.spacing().isDefault())
|
||
features.require("setspace");
|
||
|
||
// then the layouts
|
||
features.useLayout(layout.name());
|
||
|
||
// then the fonts
|
||
Language const * doc_language = bparams.language;
|
||
|
||
FontList::const_iterator fcit = fontlist.begin();
|
||
FontList::const_iterator fend = fontlist.end();
|
||
for (; fcit != fend; ++fcit) {
|
||
if (fcit->font().noun() == LyXFont::ON) {
|
||
LYXERR(Debug::LATEX) << "font.noun: "
|
||
<< fcit->font().noun()
|
||
<< endl;
|
||
features.require("noun");
|
||
LYXERR(Debug::LATEX) << "Noun enabled. Font: "
|
||
<< to_utf8(fcit->font().stateText(0))
|
||
<< endl;
|
||
}
|
||
switch (fcit->font().color()) {
|
||
case LColor::none:
|
||
case LColor::inherit:
|
||
case LColor::ignore:
|
||
// probably we should put here all interface colors used for
|
||
// font displaying! For now I just add this ones I know of (Jug)
|
||
case LColor::latex:
|
||
case LColor::note:
|
||
break;
|
||
default:
|
||
features.require("color");
|
||
LYXERR(Debug::LATEX) << "Color enabled. Font: "
|
||
<< to_utf8(fcit->font().stateText(0))
|
||
<< endl;
|
||
}
|
||
|
||
Language const * language = fcit->font().language();
|
||
if (language->babel() != doc_language->babel() &&
|
||
language != ignore_language &&
|
||
language != latex_language)
|
||
{
|
||
features.useLanguage(language);
|
||
LYXERR(Debug::LATEX) << "Found language "
|
||
<< language->babel() << endl;
|
||
}
|
||
}
|
||
|
||
if (!params.leftIndent().zero())
|
||
features.require("ParagraphLeftIndent");
|
||
|
||
// then the insets
|
||
InsetList::const_iterator icit = owner_->insetlist.begin();
|
||
InsetList::const_iterator iend = owner_->insetlist.end();
|
||
for (; icit != iend; ++icit) {
|
||
if (icit->inset) {
|
||
icit->inset->validate(features);
|
||
if (layout.needprotect &&
|
||
icit->inset->lyxCode() == InsetBase::FOOT_CODE)
|
||
features.require("NeedLyXFootnoteCode");
|
||
}
|
||
}
|
||
|
||
// then the contents
|
||
for (pos_type i = 0; i < size() ; ++i) {
|
||
for (size_t pnr = 0; pnr < phrases_nr; ++pnr) {
|
||
if (!special_phrases[pnr].builtin
|
||
&& isTextAt(special_phrases[pnr].phrase, i)) {
|
||
features.require(special_phrases[pnr].phrase);
|
||
break;
|
||
}
|
||
}
|
||
Encodings::validate(getChar(i), features);
|
||
}
|
||
}
|
||
|
||
|
||
} // namespace lyx
|