]> git.lyx.org Git - lyx.git/blobdiff - src/Paragraph.cpp
Move <QTimer> from TocWidget.h
[lyx.git] / src / Paragraph.cpp
index 5d1a7fe82041de854a1433a66ddeb0aad066d9d0..d69fa55bb539459b0760adc24d19724a6da75ec3 100644 (file)
@@ -30,7 +30,6 @@
 #include "Language.h"
 #include "LaTeXFeatures.h"
 #include "Layout.h"
-#include "Length.h"
 #include "Font.h"
 #include "FontList.h"
 #include "LyXRC.h"
 #include "support/ExceptionMessage.h"
 #include "support/gettext.h"
 #include "support/lassert.h"
+#include "support/Length.h"
 #include "support/lstrings.h"
 #include "support/textutils.h"
+#include "output_docbook.h"
 
+#include <algorithm>
 #include <atomic>
 #include <sstream>
 #include <vector>
@@ -83,14 +85,6 @@ using namespace lyx::support;
 
 namespace lyx {
 
-namespace {
-
-/// Inset identifier (above 0x10ffff, for ucs-4)
-char_type const META_INSET = 0x200001;
-
-} // namespace
-
-
 /////////////////////////////////////////////////////////////////////
 //
 // SpellResultRange
@@ -273,9 +267,9 @@ private:
        Ranges ranges_;
        /// the area of the paragraph with pending spell check
        FontSpan refresh_;
-       bool needs_refresh_;
        /// spell state cache version number
        SpellChecker::ChangeNumber current_change_number_;
+       bool needs_refresh_;
 
 
        void correctRangesAfterPos(pos_type pos, int offset)
@@ -349,7 +343,10 @@ public:
                                   Change & running_change,
                                   Layout const & style,
                                   pos_type & i,
-                                  unsigned int & column);
+                                  unsigned int & column,
+                                  bool const fontswitch_inset,
+                                  bool const closeLanguage,
+                                  bool const lang_switched_at_inset);
 
        ///
        void latexSpecialChar(
@@ -459,7 +456,7 @@ public:
        {
                int numskips = 0;
                while (it != et && it->first < start) {
-                       int skip = it->last - it->first + 1;
+                       long skip = it->last - it->first + 1;
                        start += skip;
                        numskips += skip;
                        ++it;
@@ -486,9 +483,6 @@ public:
        ///
        FontList fontlist_;
 
-       ///
-       int id_;
-
        ///
        ParagraphParameters params_;
 
@@ -513,11 +507,13 @@ public:
        Layout const * layout_;
        ///
        SpellCheckerState speller_state_;
+       ///
+       int id_;
 };
 
 
 Paragraph::Private::Private(Paragraph * owner, Layout const & layout)
-       : owner_(owner), inset_owner_(nullptr), id_(-1), begin_of_body_(0), layout_(&layout)
+       : owner_(owner), inset_owner_(nullptr), begin_of_body_(0), layout_(&layout), id_(-1)
 {
        text_.reserve(100);
 }
@@ -530,17 +526,16 @@ int Paragraph::Private::make_id()
        // LFUN_PARAGRAPH_GOTO to switch to a different buffer, for instance in the
        // outliner.
        // (thread-safe)
-       static atomic_uint next_id(0);
+       static int next_id(0);
        return next_id++;
 }
 
 
 Paragraph::Private::Private(Private const & p, Paragraph * owner)
        : owner_(owner), inset_owner_(p.inset_owner_), fontlist_(p.fontlist_),
-         id_(make_id()),
          params_(p.params_), changes_(p.changes_), insetlist_(p.insetlist_),
          begin_of_body_(p.begin_of_body_), text_(p.text_), words_(p.words_),
-         layout_(p.layout_)
+         layout_(p.layout_), id_(make_id())
 {
        requestSpellCheck(p.text_.size());
 }
@@ -548,11 +543,11 @@ Paragraph::Private::Private(Private const & p, Paragraph * owner)
 
 Paragraph::Private::Private(Private const & p, Paragraph * owner,
        pos_type beg, pos_type end)
-       : owner_(owner), inset_owner_(p.inset_owner_), id_(make_id()),
+       : owner_(owner), inset_owner_(p.inset_owner_),
          params_(p.params_), changes_(p.changes_),
          insetlist_(p.insetlist_, beg, end),
          begin_of_body_(p.begin_of_body_), words_(p.words_),
-         layout_(p.layout_)
+         layout_(p.layout_), id_(make_id())
 {
        if (beg >= pos_type(p.text_.size()))
                return;
@@ -966,7 +961,10 @@ void Paragraph::Private::latexInset(BufferParams const & bparams,
                                    Change & running_change,
                                    Layout const & style,
                                    pos_type & i,
-                                   unsigned int & column)
+                                   unsigned int & column,
+                                   bool const fontswitch_inset,
+                                   bool const closeLanguage,
+                                   bool const lang_switched_at_inset)
 {
        Inset * inset = owner_->getInset(i);
        LBUFERR(inset);
@@ -1036,41 +1034,64 @@ void Paragraph::Private::latexInset(BufferParams const & bparams,
                close = true;
        }
 
-       // FIXME: 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)
-
-       // Some insets cannot be inside a font change command.
-       // However, even such insets *can* be placed in \L or \R
-       // or their equivalents (for RTL language switches), so we don't
-       // close the language in those cases.
-       // ArabTeX, though, cannot handle this special behavior, it seems.
-       bool arabtex = basefont.language()->lang() == "arabic_arabtex"
-               || running_font.language()->lang() == "arabic_arabtex";
-       if (open_font && !inset->inheritFont()) {
-               bool needPar = false;
-               bool closeLanguage = arabtex
-                       || basefont.isRightToLeft() == running_font.isRightToLeft();
-               unsigned int count = running_font.latexWriteEndChanges(os,
-                                       bparams, runparams, basefont, basefont,
-                                       needPar, closeLanguage);
-               column += count;
-               // if any font properties were closed, update the running_font,
-               // making sure, however, to leave the language as it was
-               if (count > 0) {
-                       // FIXME: probably a better way to keep track of the old
-                       // language, than copying the entire font?
-                       Font const copy_font(running_font);
-                       basefont = owner_->getLayoutFont(bparams, outerfont);
-                       running_font = basefont;
-                       if (!closeLanguage)
-                               running_font.setLanguage(copy_font.language());
-                       // leave font open if language is still open
-                       open_font = (running_font.language() == basefont.language());
-                       if (closeLanguage)
-                               runparams.local_font = &basefont;
+       if (open_font && fontswitch_inset) {
+               bool lang_closed = false;
+               // Close language if needed
+               if (closeLanguage && !lang_switched_at_inset) {
+                       // We need prev_font here as language changes directly at inset
+                       // will only be started inside the inset.
+                       Font const prev_font = (i > 0) ?
+                                               owner_->getFont(bparams, i - 1, outerfont)
+                                             : running_font;
+                       Font tmpfont(basefont);
+                       tmpfont.setLanguage(prev_font.language());
+                       bool needPar = false;
+                       unsigned int count = tmpfont.latexWriteEndChanges(os, bparams, runparams,
+                                                                         basefont, basefont,
+                                                                         needPar, closeLanguage);
+                       column += count;
+                       lang_closed = count > 0;
                }
+               // Update the running_font, making sure, however,
+               // to leave the language as it was.
+               // FIXME: probably a better way to keep track of the old
+               // language, than copying the entire font?
+               Font const copy_font(running_font);
+               basefont = owner_->getLayoutFont(bparams, outerfont);
+               running_font = basefont;
+               if (!closeLanguage)
+                       running_font.setLanguage(copy_font.language());
+               OutputParams rp = runparams;
+               rp.encoding = basefont.language()->encoding();
+               // For these, we use switches, so they should be taken as
+               // base inside the inset.
+               basefont.fontInfo().setSize(copy_font.fontInfo().size());
+               basefont.fontInfo().setFamily(copy_font.fontInfo().family());
+               basefont.fontInfo().setSeries(copy_font.fontInfo().series());
+               // Now re-do font changes in a way needed here
+               // (using switches with multi-par insets)
+               InsetText const * textinset = inset->asInsetText();
+               bool const cprotect = textinset
+                       ? textinset->hasCProtectContent(runparams.moving_arg)
+                         && !textinset->text().isMainText()
+                       : false;
+               unsigned int count2 = basefont.latexWriteStartChanges(os, bparams,
+                                                     rp, running_font,
+                                                     basefont, true,
+                                                     cprotect);
+               open_font = true;
+               column += count2;
+               if (count2 == 0 && (lang_closed || lang_switched_at_inset))
+                       // All fonts closed
+                       open_font = false;
+               if (closeLanguage)
+                       runparams.local_font = &basefont;
+       }
+
+       if (fontswitch_inset && !closeLanguage) {
+               // The directionality has been switched at inset.
+               // Force markup inside.
+               runparams.local_font = &basefont;
        }
 
        size_t const previous_row_count = os.texrow().rows();
@@ -1083,7 +1104,7 @@ void Paragraph::Private::latexInset(BufferParams const & bparams,
                // add location information and throw again.
                e.par_id = id_;
                e.pos = i;
-               throw(e);
+               throw;
        }
 
        if (close)
@@ -2054,13 +2075,6 @@ docstring Paragraph::expandLabel(Layout const & layout,
 }
 
 
-docstring Paragraph::expandDocBookLabel(Layout const & layout,
-               BufferParams const & bparams) const
-{
-       return expandParagraphLabel(layout, bparams, false);
-}
-
-
 docstring Paragraph::expandParagraphLabel(Layout const & layout,
                BufferParams const & bparams, bool process_appendix) const
 {
@@ -2400,6 +2414,11 @@ void Paragraph::latex(BufferParams const & bparams,
        pos_type body_pos = beginOfBody();
        unsigned int column = 0;
 
+       // If we are inside an non inheritFont() inset, the real outerfont is local_font
+       Font const real_outerfont = (!inInset().inheritFont()
+                                    && runparams.local_font != nullptr)
+                       ? Font(runparams.local_font->fontInfo()) : outerfont;
+
        if (body_pos > 0) {
                // the optional argument is kept in curly brackets in
                // case it contains a ']'
@@ -2409,9 +2428,9 @@ void Paragraph::latex(BufferParams const & bparams,
                // braces when it parses \item.
                os << "[{";
                column += 2;
-               basefont = getLabelFont(bparams, outerfont);
+               basefont = getLabelFont(bparams, real_outerfont);
        } else {
-               basefont = getLayoutFont(bparams, outerfont);
+               basefont = getLayoutFont(bparams, real_outerfont);
        }
 
        // Which font is currently active?
@@ -2456,7 +2475,7 @@ void Paragraph::latex(BufferParams const & bparams,
                                                basefont, basefont, needPar);
                                        open_font = false;
                                }
-                               basefont = getLayoutFont(bparams, outerfont);
+                               basefont = getLayoutFont(bparams, real_outerfont);
                                running_font = basefont;
 
                                column += Changes::latexMarkChange(os, bparams,
@@ -2523,8 +2542,8 @@ void Paragraph::latex(BufferParams const & bparams,
                                                basefont, needPar);
                                        open_font = false;
                                }
-                               basefont = (body_pos > i) ? getLabelFont(bparams, outerfont)
-                                                         : getLayoutFont(bparams, outerfont);
+                               basefont = (body_pos > i) ? getLabelFont(bparams, real_outerfont)
+                                                         : getLayoutFont(bparams, real_outerfont);
                                running_font = basefont;
                                column += Changes::latexMarkChange(os, bparams,
                                        Change(Change::INSERTED), change, rp);
@@ -2544,8 +2563,8 @@ void Paragraph::latex(BufferParams const & bparams,
                                                basefont, basefont, needPar);
                                open_font = false;
                        }
-                       basefont = (body_pos > i) ? getLabelFont(bparams, outerfont)
-                                                 : getLayoutFont(bparams, outerfont);
+                       basefont = (body_pos > i) ? getLabelFont(bparams, real_outerfont)
+                                                 : getLayoutFont(bparams, real_outerfont);
                        running_font = basefont;
                        column += Changes::latexMarkChange(os, bparams, runningChange,
                                                           change, runparams);
@@ -2561,18 +2580,48 @@ void Paragraph::latex(BufferParams const & bparams,
                ++column;
 
                // Fully instantiated font
-               Font const current_font = getFont(bparams, i, outerfont);
+               Font current_font = getFont(bparams, i, outerfont);
+               // Previous font
+               Font const prev_font = (i > 0) ?
+                                       getFont(bparams, i - 1, outerfont)
+                                     : current_font;
 
                Font const last_font = running_font;
                bool const in_ct_deletion = (bparams.output_changes
                                             && runningChange == change
                                             && change.type == Change::DELETED
                                             && !os.afterParbreak());
+               // Insets where font switches are used (rather than font commands)
+               bool const fontswitch_inset =
+                               c == META_INSET
+                               && getInset(i)
+                               && getInset(i)->allowMultiPar()
+                               && getInset(i)->lyxCode() != ERT_CODE;
+
+               bool closeLanguage = false;
+               bool lang_switched_at_inset = false;
+               if (fontswitch_inset) {
+                       // Some insets cannot be inside a font change command.
+                       // However, even such insets *can* be placed in \L or \R
+                       // or their equivalents (for RTL language switches),
+                       // so we don't close the language in those cases
+                       // (= differing isRightToLeft()).
+                       // ArabTeX, though, doesn't seem to handle this special behavior.
+                       closeLanguage = basefont.isRightToLeft() == current_font.isRightToLeft()
+                                       || basefont.language()->lang() == "arabic_arabtex"
+                                       || current_font.language()->lang() == "arabic_arabtex";
+                       // We need to check prev_font as language changes directly at inset
+                       // will only be started inside the inset.
+                       lang_switched_at_inset = prev_font.language() != current_font.language();
+               }
 
                // Do we need to close the previous font?
+               bool langClosed = false;
                if (open_font &&
-                   (current_font != running_font ||
-                    current_font.language() != running_font.language()))
+                   ((current_font != running_font
+                     || current_font.language() != running_font.language())
+                    || (fontswitch_inset
+                        && (current_font == prev_font))))
                {
                        // ensure there is no open script-wrapper
                        if (!alien_script.empty()) {
@@ -2587,10 +2636,13 @@ void Paragraph::latex(BufferParams const & bparams,
                                os << '}';
                                column += 1;
                        }
+                       if (closeLanguage)
+                               // Force language closing
+                               current_font.setLanguage(basefont.language());
+                       Font const nextfont = (i == body_pos-1) ? basefont : current_font;
                        column += running_font.latexWriteEndChanges(
                                    os, bparams, runparams, basefont,
-                                   (i == body_pos-1) ? basefont : current_font,
-                                   needPar);
+                                   nextfont, needPar);
                        if (in_ct_deletion) {
                                // We have to close and then reopen \lyxdeleted,
                                // as strikeout needs to be on lowest level.
@@ -2598,8 +2650,12 @@ void Paragraph::latex(BufferParams const & bparams,
                                column += Changes::latexMarkChange(os, bparams,
                                        Change(Change::UNCHANGED), Change(Change::DELETED), rp);
                        }
-                       running_font = basefont;
                        open_font = false;
+                       // Has the language been closed in the latexWriteEndChanges() call above?
+                       langClosed = running_font.language() != basefont.language()
+                                       && running_font.language() != nextfont.language()
+                                       && (running_font.language()->encoding()->package() != Encoding::CJK);
+                       running_font = basefont;
                }
 
                // if necessary, close language environment before opening CJK
@@ -2616,7 +2672,8 @@ void Paragraph::latex(BufferParams const & bparams,
                }
 
                // Switch file encoding if necessary (and allowed)
-               if (!runparams.pass_thru && !style.pass_thru &&
+               if ((!fontswitch_inset || closeLanguage)
+                   && !runparams.pass_thru && !style.pass_thru &&
                    runparams.encoding->package() != Encoding::none &&
                    current_font.language()->encoding()->package() != Encoding::none) {
                        pair<bool, int> const enc_switch =
@@ -2646,51 +2703,59 @@ void Paragraph::latex(BufferParams const & bparams,
                     current_font.language() != running_font.language())
                    && i != body_pos - 1)
                {
-                       if (in_ct_deletion) {
-                               // We have to close and then reopen \lyxdeleted,
-                               // as strikeout needs to be on lowest level.
-                               bool needPar = false;
-                               OutputParams rp = runparams;
-                               column += running_font.latexWriteEndChanges(
-                                       os, bparams, rp, basefont,
-                                       basefont, needPar);
-                               os << '}';
-                               column += 1;
-                       }
-                       odocstringstream ods;
-                       column += current_font.latexWriteStartChanges(ods, bparams,
-                                                             runparams, basefont,
-                                                             last_font);
-                       // Check again for display math in ulem commands as a
-                       // font change may also occur just before a math inset.
-                       if (runparams.inDisplayMath && !deleted_display_math
-                           && runparams.inulemcmd) {
-                               if (os.afterParbreak())
-                                       os << "\\noindent";
-                               else
-                                       os << "\\\\\n";
-                       }
-                       running_font = current_font;
-                       open_font = true;
-                       docstring fontchange = ods.str();
-                       // check whether the fontchange ends with a \\textcolor
-                       // modifier and the text starts with a space (bug 4473)
-                       docstring const last_modifier = rsplit(fontchange, '\\');
-                       if (prefixIs(last_modifier, from_ascii("textcolor")) && c == ' ')
-                               os << fontchange << from_ascii("{}");
-                       // check if the fontchange ends with a trailing blank
-                       // (like "\small " (see bug 3382)
-                       else if (suffixIs(fontchange, ' ') && c == ' ')
-                               os << fontchange.substr(0, fontchange.size() - 1)
-                                  << from_ascii("{}");
-                       else
+                       if (!fontswitch_inset) {
+                               if (in_ct_deletion) {
+                                       // We have to close and then reopen \lyxdeleted,
+                                       // as strikeout needs to be on lowest level.
+                                       bool needPar = false;
+                                       OutputParams rp = runparams;
+                                       column += running_font.latexWriteEndChanges(
+                                               os, bparams, rp, basefont,
+                                               basefont, needPar);
+                                       os << '}';
+                                       column += 1;
+                               }
+                               otexstringstream ots;
+                               InsetText const * textinset = inInset().asInsetText();
+                               bool const cprotect = textinset
+                                       ? textinset->hasCProtectContent(runparams.moving_arg)
+                                         && !textinset->text().isMainText()
+                                       : false;
+                               column += current_font.latexWriteStartChanges(ots, bparams,
+                                                                             runparams, basefont, last_font, false,
+                                                                             cprotect);
+                               // Check again for display math in ulem commands as a
+                               // font change may also occur just before a math inset.
+                               if (runparams.inDisplayMath && !deleted_display_math
+                                   && runparams.inulemcmd) {
+                                       if (os.afterParbreak())
+                                               os << "\\noindent";
+                                       else
+                                               os << "\\\\\n";
+                               }
+                               running_font = current_font;
+                               open_font = true;
+                               docstring fontchange = ots.str();
                                os << fontchange;
-                       if (in_ct_deletion) {
-                               // We have to close and then reopen \lyxdeleted,
-                               // as strikeout needs to be on lowest level.
-                               OutputParams rp = runparams;
-                               column += Changes::latexMarkChange(os, bparams,
-                                       Change(Change::UNCHANGED), change, rp);
+                               // check whether the fontchange ends with a \\textcolor
+                               // modifier and the text starts with a space. If so we
+                               // need to add } in order to prevent \\textcolor from gobbling
+                               // the space (bug 4473).
+                               docstring const last_modifier = rsplit(fontchange, '\\');
+                               if (prefixIs(last_modifier, from_ascii("textcolor")) && c == ' ')
+                                       os << from_ascii("{}");
+                               else if (ots.terminateCommand())
+                                       os << termcmd;
+                               if (in_ct_deletion) {
+                                       // We have to close and then reopen \lyxdeleted,
+                                       // as strikeout needs to be on lowest level.
+                                       OutputParams rp = runparams;
+                                       column += Changes::latexMarkChange(os, bparams,
+                                               Change(Change::UNCHANGED), change, rp);
+                               }
+                       } else {
+                               running_font = current_font;
+                               open_font = !langClosed;
                        }
                }
 
@@ -2743,19 +2808,35 @@ void Paragraph::latex(BufferParams const & bparams,
                                                pit < 0 || pars[pit].empty()
                                                ? pars[pit].getLayoutFont(
                                                                bparams,
-                                                               outerfont)
+                                                               real_outerfont)
                                                : pars[pit].getFont(bparams,
                                                        pars[pit].size() - 1,
-                                                       outerfont);
+                                                       real_outerfont);
                                        if (lastfont.fontInfo().size() !=
                                            basefont.fontInfo().size()) {
                                                ++parInline;
                                                incremented = true;
                                        }
                                }
+                               // We need to restore parts of this after insets with
+                               // allowMultiPar() true
+                               Font const save_basefont = basefont;
                                d->latexInset(bparams, os, rp, running_font,
-                                               basefont, outerfont, open_font,
-                                               runningChange, style, i, column);
+                                               basefont, real_outerfont, open_font,
+                                               runningChange, style, i, column, fontswitch_inset,
+                                               closeLanguage, lang_switched_at_inset);
+                               if (fontswitch_inset) {
+                                       if (open_font) {
+                                               bool needPar = false;
+                                               column += running_font.latexWriteEndChanges(
+                                                       os, bparams, runparams,
+                                                       basefont, basefont, needPar);
+                                               open_font = false;
+                                       }
+                                       basefont.fontInfo().setSize(save_basefont.fontInfo().size());
+                                       basefont.fontInfo().setFamily(save_basefont.fontInfo().family());
+                                       basefont.fontInfo().setSeries(save_basefont.fontInfo().series());
+                               }
                                if (incremented)
                                        --parInline;
 
@@ -2798,7 +2879,7 @@ void Paragraph::latex(BufferParams const & bparams,
                                        // add location information and throw again.
                                        e.par_id = id();
                                        e.pos = i;
-                                       throw(e);
+                                       throw;
                                }
                        }
                }
@@ -2839,8 +2920,8 @@ void Paragraph::latex(BufferParams const & bparams,
                // since this produces unwanted whitespace.
 
                Font const font = empty()
-                       ? getLayoutFont(bparams, outerfont)
-                       : getFont(bparams, size() - 1, outerfont);
+                       ? getLayoutFont(bparams, real_outerfont)
+                       : getFont(bparams, size() - 1, real_outerfont);
 
                InsetText const * textinset = inInset().asInsetText();
 
@@ -2952,18 +3033,17 @@ string Paragraph::getID(Buffer const &, OutputParams const &)
 }
 
 
-pos_type Paragraph::firstWordDocBook(odocstream & os, OutputParams const & runparams)
-       const
+pos_type Paragraph::firstWordDocBook(XMLStream & xs, OutputParams const & runparams) const
 {
        pos_type i;
        for (i = 0; i < size(); ++i) {
                if (Inset const * inset = getInset(i)) {
-                       inset->docbook(os, runparams);
+                       inset->docbook(xs, runparams);
                } else {
                        char_type c = d->text_[i];
                        if (c == ' ')
                                break;
-                       os << xml::escapeChar(c, XMLStream::ESCAPE_ALL);
+                       xs << c;
                }
        }
        return i;
@@ -3005,57 +3085,381 @@ bool Paragraph::Private::onlyText(Buffer const & buf, Font const & outerfont, po
 }
 
 
-void Paragraph::simpleDocBookOnePar(Buffer const & buf,
-                                   odocstream & os,
-                                   OutputParams const & runparams,
-                                   Font const & outerfont,
-                                   pos_type initial) const
+namespace {
+
+void doFontSwitchDocBook(vector<xml::FontTag> & tagsToOpen,
+                  vector<xml::EndFontTag> & tagsToClose,
+                  bool & flag, FontState curstate, xml::FontTypes type)
 {
+       if (curstate == FONT_ON) {
+               tagsToOpen.push_back(docbookStartFontTag(type));
+               flag = true;
+       } else if (flag) {
+               tagsToClose.push_back(docbookEndFontTag(type));
+               flag = false;
+       }
+}
+
+class OptionalFontType {
+public:
+       xml::FontTypes ft;
+       bool has_value;
+
+       OptionalFontType(): ft(xml::FT_EMPH), has_value(false) {} // A possible value at random for ft.
+       OptionalFontType(xml::FontTypes ft): ft(ft), has_value(true) {}
+};
+
+OptionalFontType fontShapeToXml(FontShape fs)
+{
+       switch (fs) {
+       case ITALIC_SHAPE:
+               return {xml::FT_ITALIC};
+       case SLANTED_SHAPE:
+               return {xml::FT_SLANTED};
+       case SMALLCAPS_SHAPE:
+               return {xml::FT_SMALLCAPS};
+       case UP_SHAPE:
+       case INHERIT_SHAPE:
+               return {};
+       default:
+               // the other tags are for internal use
+               LATTEST(false);
+               return {};
+       }
+}
+
+OptionalFontType fontFamilyToXml(FontFamily fm)
+{
+       switch (fm) {
+       case ROMAN_FAMILY:
+               return {xml::FT_ROMAN};
+       case SANS_FAMILY:
+               return {xml::FT_SANS};
+       case TYPEWRITER_FAMILY:
+               return {xml::FT_TYPE};
+       case INHERIT_FAMILY:
+               return {};
+       default:
+               // the other tags are for internal use
+               LATTEST(false);
+               return {};
+       }
+}
+
+OptionalFontType fontSizeToXml(FontSize fs)
+{
+       switch (fs) {
+       case TINY_SIZE:
+               return {xml::FT_SIZE_TINY};
+       case SCRIPT_SIZE:
+               return {xml::FT_SIZE_SCRIPT};
+       case FOOTNOTE_SIZE:
+               return {xml::FT_SIZE_FOOTNOTE};
+       case SMALL_SIZE:
+               return {xml::FT_SIZE_SMALL};
+       case LARGE_SIZE:
+               return {xml::FT_SIZE_LARGE};
+       case LARGER_SIZE:
+               return {xml::FT_SIZE_LARGER};
+       case LARGEST_SIZE:
+               return {xml::FT_SIZE_LARGEST};
+       case HUGE_SIZE:
+               return {xml::FT_SIZE_HUGE};
+       case HUGER_SIZE:
+               return {xml::FT_SIZE_HUGER};
+       case INCREASE_SIZE:
+               return {xml::FT_SIZE_INCREASE};
+       case DECREASE_SIZE:
+               return {xml::FT_SIZE_DECREASE};
+       case INHERIT_SIZE:
+       case NORMAL_SIZE:
+               return {};
+       default:
+               // the other tags are for internal use
+               LATTEST(false);
+               return {};
+       }
+}
+
+struct DocBookFontState
+{
+       FontShape  curr_fs   = INHERIT_SHAPE;
+       FontFamily curr_fam  = INHERIT_FAMILY;
+       FontSize   curr_size = INHERIT_SIZE;
+
+       // track whether we have opened these tags
        bool emph_flag = false;
+       bool bold_flag = false;
+       bool noun_flag = false;
+       bool ubar_flag = false;
+       bool dbar_flag = false;
+       bool sout_flag = false;
+       bool xout_flag = false;
+       bool wave_flag = false;
+       // shape tags
+       bool shap_flag = false;
+       // family tags
+       bool faml_flag = false;
+       // size tags
+       bool size_flag = false;
+};
+
+std::tuple<vector<xml::FontTag>, vector<xml::EndFontTag>> computeDocBookFontSwitch(FontInfo const & font_old,
+                                                                                          Font const & font,
+                                                                                          std::string const & default_family,
+                                                                                          DocBookFontState & fs)
+{
+       vector<xml::FontTag> tagsToOpen;
+       vector<xml::EndFontTag> tagsToClose;
+
+       // emphasis
+       FontState curstate = font.fontInfo().emph();
+       if (font_old.emph() != curstate)
+               doFontSwitchDocBook(tagsToOpen, tagsToClose, fs.emph_flag, curstate, xml::FT_EMPH);
+
+       // noun
+       curstate = font.fontInfo().noun();
+       if (font_old.noun() != curstate)
+               doFontSwitchDocBook(tagsToOpen, tagsToClose, fs.noun_flag, curstate, xml::FT_NOUN);
+
+       // underbar
+       curstate = font.fontInfo().underbar();
+       if (font_old.underbar() != curstate)
+               doFontSwitchDocBook(tagsToOpen, tagsToClose, fs.ubar_flag, curstate, xml::FT_UBAR);
+
+       // strikeout
+       curstate = font.fontInfo().strikeout();
+       if (font_old.strikeout() != curstate)
+               doFontSwitchDocBook(tagsToOpen, tagsToClose, fs.sout_flag, curstate, xml::FT_SOUT);
+
+       // xout
+       curstate = font.fontInfo().xout();
+       if (font_old.xout() != curstate)
+               doFontSwitchDocBook(tagsToOpen, tagsToClose, fs.xout_flag, curstate, xml::FT_XOUT);
+
+       // double underbar
+       curstate = font.fontInfo().uuline();
+       if (font_old.uuline() != curstate)
+               doFontSwitchDocBook(tagsToOpen, tagsToClose, fs.dbar_flag, curstate, xml::FT_DBAR);
+
+       // wavy line
+       curstate = font.fontInfo().uwave();
+       if (font_old.uwave() != curstate)
+               doFontSwitchDocBook(tagsToOpen, tagsToClose, fs.wave_flag, curstate, xml::FT_WAVE);
+
+       // bold
+       // a little hackish, but allows us to reuse what we have.
+       curstate = (font.fontInfo().series() == BOLD_SERIES ? FONT_ON : FONT_OFF);
+       if (font_old.series() != font.fontInfo().series())
+               doFontSwitchDocBook(tagsToOpen, tagsToClose, fs.bold_flag, curstate, xml::FT_BOLD);
+
+       // Font shape
+       fs.curr_fs = font.fontInfo().shape();
+       FontShape old_fs = font_old.shape();
+       if (old_fs != fs.curr_fs) {
+               if (fs.shap_flag) {
+                       OptionalFontType tag = fontShapeToXml(old_fs);
+                       if (tag.has_value)
+                               tagsToClose.push_back(docbookEndFontTag(tag.ft));
+                       fs.shap_flag = false;
+               }
+
+               OptionalFontType tag = fontShapeToXml(fs.curr_fs);
+               if (tag.has_value)
+                       tagsToOpen.push_back(docbookStartFontTag(tag.ft));
+       }
+
+       // Font family
+       fs.curr_fam = font.fontInfo().family();
+       FontFamily old_fam = font_old.family();
+       if (old_fam != fs.curr_fam) {
+               if (fs.faml_flag) {
+                       OptionalFontType tag = fontFamilyToXml(old_fam);
+                       if (tag.has_value)
+                               tagsToClose.push_back(docbookEndFontTag(tag.ft));
+                       fs.faml_flag = false;
+               }
+               switch (fs.curr_fam) {
+                       case ROMAN_FAMILY:
+                               // we will treat a "default" font family as roman, since we have
+                               // no other idea what to do.
+                               if (default_family != "rmdefault" && default_family != "default") {
+                                       tagsToOpen.push_back(docbookStartFontTag(xml::FT_ROMAN));
+                                       fs.faml_flag = true;
+                               }
+                               break;
+                       case SANS_FAMILY:
+                               if (default_family != "sfdefault") {
+                                       tagsToOpen.push_back(docbookStartFontTag(xml::FT_SANS));
+                                       fs.faml_flag = true;
+                               }
+                               break;
+                       case TYPEWRITER_FAMILY:
+                               if (default_family != "ttdefault") {
+                                       tagsToOpen.push_back(docbookStartFontTag(xml::FT_TYPE));
+                                       fs.faml_flag = true;
+                               }
+                               break;
+                       case INHERIT_FAMILY:
+                               break;
+                       default:
+                               // the other tags are for internal use
+                               LATTEST(false);
+                               break;
+               }
+       }
+
+       // Font size
+       fs.curr_size = font.fontInfo().size();
+       FontSize old_size = font_old.size();
+       if (old_size != fs.curr_size) {
+               if (fs.size_flag) {
+                       OptionalFontType tag = fontSizeToXml(old_size);
+                       if (tag.has_value)
+                               tagsToClose.push_back(docbookEndFontTag(tag.ft));
+                       fs.size_flag = false;
+               }
+
+               OptionalFontType tag = fontSizeToXml(fs.curr_size);
+               if (tag.has_value) {
+                       tagsToOpen.push_back(docbookStartFontTag(tag.ft));
+                       fs.size_flag = true;
+               }
+       }
+
+       return std::tuple<vector<xml::FontTag>, vector<xml::EndFontTag>>(tagsToOpen, tagsToClose);
+}
+
+} // anonymous namespace
+
+
+std::vector<docstring> Paragraph::simpleDocBookOnePar(Buffer const & buf,
+                                                      OutputParams const & runparams,
+                                                      Font const & outerfont,
+                                                      pos_type initial,
+                                                      bool is_last_par,
+                                                      bool ignore_fonts) const
+{
+       // Track whether we have opened these tags
+       DocBookFontState fs;
 
        Layout const & style = *d->layout_;
        FontInfo font_old =
-               style.labeltype == LABEL_MANUAL ? style.labelfont : style.font;
+                       style.labeltype == LABEL_MANUAL ? style.labelfont : style.font;
 
-       if (style.pass_thru && !d->onlyText(buf, outerfont, initial))
-               os << "]]>";
+       string const default_family =
+                       buf.masterBuffer()->params().fonts_default_family;
 
-       // parsing main loop
+       vector<xml::FontTag> tagsToOpen;
+       vector<xml::EndFontTag> tagsToClose;
+
+       std::vector<docstring> generatedParagraphs;
+       DocBookFontState old_fs = fs;
+       odocstringstream os;
+       auto * xs = new XMLStream(os); // XMLStream has no copy constructor: to create a new object, the only solution
+       // is to hold a pointer to the XMLStream (xs = XMLStream(os) is not allowed once the first object is built).
+
+       // When a font tag ends with a space, output it after the closing font tag. This requires to store delayed
+       // characters at some point.
+       std::vector<char_type> delayedChars;
+
+       // Parsing main loop.
        for (pos_type i = initial; i < size(); ++i) {
-               Font font = getFont(buf.params(), i, outerfont);
-
-               // handle <emphasis> tag
-               if (font_old.emph() != font.fontInfo().emph()) {
-                       if (font.fontInfo().emph() == FONT_ON) {
-                               os << "<emphasis>";
-                               emph_flag = true;
-                       } else if (i != initial) {
-                               os << "</emphasis>";
-                               emph_flag = false;
+               // Don't show deleted material in the output.
+               if (isDeleted(i))
+                       continue;
+
+               // If this is an InsetNewline, generate a new paragraph. Also reset the fonts, so that tags are closed in
+               // this paragraph.
+               if (getInset(i) != nullptr && getInset(i)->lyxCode() == NEWLINE_CODE) {
+                       if (!ignore_fonts)
+                               xs->closeFontTags();
+
+                       // Output one paragraph (i.e. one string entry in generatedParagraphs).
+                       generatedParagraphs.push_back(os.str());
+
+                       // Create a new XMLStream for the new paragraph, completely independent from the previous one. This implies
+                       // that the string stream must be reset.
+                       os.str(from_ascii(""));
+                       delete xs;
+                       xs = new XMLStream(os);
+
+                       // Restore the fonts for the new paragraph, so that the right tags are opened for the new entry.
+                       if (!ignore_fonts) {
+                               font_old = outerfont.fontInfo();
+                               fs = old_fs;
                        }
                }
 
+               // Determine which tags should be opened or closed regarding fonts.
+               Font const font = getFont(buf.masterBuffer()->params(), i, outerfont);
+               if (!ignore_fonts) {
+                       tie(tagsToOpen, tagsToClose) = computeDocBookFontSwitch(font_old, font, default_family, fs);
+
+                       // FIXME XHTML
+                       // Other such tags? What about the other text ranges?
+
+                       vector<xml::EndFontTag>::const_iterator cit = tagsToClose.begin();
+                       vector<xml::EndFontTag>::const_iterator cen = tagsToClose.end();
+                       for (; cit != cen; ++cit)
+                               *xs << *cit;
+
+                       // Deal with the delayed characters *after* closing font tags.
+                       if (!delayedChars.empty()) {
+                               for (char_type c: delayedChars)
+                                       *xs << c;
+                               delayedChars.clear();
+                       }
+
+                       vector<xml::FontTag>::const_iterator sit = tagsToOpen.begin();
+                       vector<xml::FontTag>::const_iterator sen = tagsToOpen.end();
+                       for (; sit != sen; ++sit)
+                               *xs << *sit;
+
+                       tagsToClose.clear();
+                       tagsToOpen.clear();
+               }
+
                if (Inset const * inset = getInset(i)) {
-                       inset->docbook(os, runparams);
-               } else {
-                       char_type c = d->text_[i];
+                       if (!runparams.for_toc || inset->isInToc()) {
+                               OutputParams np = runparams;
+                               np.local_font = &font;
 
-                       if (style.pass_thru)
-                               os.put(c);
+                               // TODO: special case will bite here.
+                               np.docbook_in_par = true;
+                               inset->docbook(*xs, np);
+                       }
+               } else {
+                       char_type c = getUChar(buf.masterBuffer()->params(), runparams, i);
+                       if (lyx::isSpace(c) && !ignore_fonts)
+                               delayedChars.push_back(c);
                        else
-                               os << xml::escapeChar(c, XMLStream::EscapeSettings::ESCAPE_ALL);
+                               *xs << c;
                }
                font_old = font.fontInfo();
        }
 
-       if (emph_flag) {
-               os << "</emphasis>";
-       }
+       // FIXME, this code is just imported from XHTML
+       // I'm worried about what happens if a branch, say, is itself
+       // wrapped in some font stuff. I think that will not work.
+       if (!ignore_fonts)
+               xs->closeFontTags();
 
-       if (style.free_spacing)
-               os << '\n';
-       if (style.pass_thru && !d->onlyText(buf, outerfont, initial))
-               os << "<![CDATA[";
+       // Deal with the delayed characters *after* closing font tags.
+       if (!delayedChars.empty())
+               for (char_type c: delayedChars)
+                       *xs << c;
+
+       // In listings, new lines (i.e. \n characters in the output) are very important. Avoid generating one for the
+       // last line to get a clean output.
+       if (runparams.docbook_in_listing && !is_last_par)
+               *xs << xml::CR();
+
+       // Finalise the last (and most likely only) paragraph.
+       generatedParagraphs.push_back(os.str());
+       delete xs;
+
+       return generatedParagraphs;
 }
 
 
@@ -3490,8 +3894,8 @@ bool Paragraph::isHardHyphenOrApostrophe(pos_type pos) const
        char_type const c = d->text_[pos];
        if (c != '-' && c != '\'')
                return false;
-       int nextpos = pos + 1;
-       int prevpos = pos > 0 ? pos - 1 : 0;
+       pos_type nextpos = pos + 1;
+       pos_type prevpos = pos > 0 ? pos - 1 : 0;
        if ((nextpos == psize || isSpace(nextpos))
                && (pos == 0 || isSpace(prevpos)))
                return false;
@@ -3532,9 +3936,6 @@ bool Paragraph::needsCProtection(bool const fragile) const
                Inset const * ins = getInset(i);
                if (ins->needsCProtection(maintext, fragile))
                        return true;
-               if (ins->getLayout().latextype() == InsetLayout::ENVIRONMENT)
-                       // Environments need cprotection regardless the content
-                       return true;
                // Now check math environments
                InsetMath const * im = getInset(i)->asInsetMath();
                if (!im || im->cell(0).empty())
@@ -3795,7 +4196,7 @@ bool Paragraph::brokenBiblio() const
 int Paragraph::fixBiblio(Buffer const & buffer)
 {
        // FIXME: when there was already an inset at 0, the return value is 1,
-       // which does not tell whether another inset has been remove; the
+       // which does not tell whether another inset has been removed; the
        // cursor cannot be correctly updated.
 
        bool const track_changes = buffer.params().track_changes;
@@ -3827,6 +4228,8 @@ int Paragraph::fixBiblio(Buffer const & buffer)
                // than keep the first? (JMarc)
                Inset * inset = releaseInset(bibitem_pos);
                d->insetlist_.begin()->inset = inset;
+               // This needs to be done to update the counter (#8499)
+               buffer.updateBuffer();
                return -bibitem_pos;
        }
 
@@ -3966,10 +4369,8 @@ void Paragraph::changeCase(BufferParams const & bparams, pos_type pos,
                }
 
                int erasePos = pos - changes.size();
-               for (size_t i = 0; i < changes.size(); i++) {
-                       insertChar(pos, changes[i].first,
-                                  changes[i].second,
-                                  trackChanges);
+               for (auto const & change : changes) {
+                       insertChar(pos, change.first, change.second, trackChanges);
                        if (!eraseChar(erasePos, trackChanges)) {
                                ++erasePos;
                                ++pos; // advance
@@ -3992,9 +4393,12 @@ int Paragraph::find(docstring const & str, bool cs, bool mw,
                // Ignore "invisible" letters such as ligature breaks
                // and hyphenation chars while searching
                while (pos < parsize - 1 && isInset(pos)) {
+                       Inset const * inset = getInset(pos);
+                       if (!inset->isLetter())
+                               break;
                        odocstringstream os;
-                       getInset(pos)->toString(os);
-                       if (!getInset(pos)->isLetter() || !os.str().empty())
+                       inset->toString(os);
+                       if (!os.str().empty())
                                break;
                        pos++;
                }
@@ -4188,7 +4592,18 @@ Language * Paragraph::Private::locateSpellRange(
        while (last < to && samelang && sameinset) {
                // hop to end of word
                while (last < to && !owner_->isWordSeparator(last)) {
-                       if (owner_->getInset(last)) {
+                       Inset const * inset = owner_->getInset(last);
+                       if (inset && dynamic_cast<const InsetSpecialChar *>(inset)) {
+                               // check for "invisible" letters such as ligature breaks
+                               odocstringstream os;
+                               inset->toString(os);
+                               if (os.str().length() != 0) {
+                                       // avoid spell check of visible special char insets
+                                       // stop the loop in front of the special char inset
+                                       sameinset = false;
+                                       break;
+                               }
+                       } else if (inset) {
                                appendSkipPosition(skips, last);
                        } else if (owner_->isDeleted(last)) {
                                appendSkipPosition(skips, last);
@@ -4414,7 +4829,7 @@ void Paragraph::spellCheck() const
                        // start the spell checker on the unit of meaning
                        docstring word = asString(first, last, AS_STR_INSETS + AS_STR_SKIPDELETE);
                        WordLangTuple wl = WordLangTuple(word, lang);
-                       SpellChecker::Result result = word.size() ?
+                       SpellChecker::Result result = !word.empty() ?
                                speller->check(wl) : SpellChecker::WORD_OK;
                        d->markMisspelledWords(first, last, result, word, skips);
                        first = ++last;