commit e4ef8ddc0f820290a2fead1149e1e950bd947832
Author: Juergen Spitzmueller <[email protected]>
Date:   Fri Jul 3 16:18:53 2020 +0200

    Properly fix handling of title layouts within insets (#11787)
---
 src/OutputParams.cpp       |    7 ++++---
 src/OutputParams.h         |    9 +++++++++
 src/Paragraph.cpp          |    4 ++++
 src/insets/InsetBranch.cpp |    3 +++
 src/insets/InsetText.cpp   |    3 +++
 src/output_latex.cpp       |   22 +++++++++++-----------
 6 files changed, 34 insertions(+), 14 deletions(-)

diff --git a/src/OutputParams.cpp b/src/OutputParams.cpp
index 9381bd5..0409634 100644
--- a/src/OutputParams.cpp
+++ b/src/OutputParams.cpp
@@ -20,9 +20,10 @@ namespace lyx {
 
 OutputParams::OutputParams(Encoding const * enc)
        : flavor(LATEX), math_flavor(NotApplicable), nice(false), 
is_child(false),
-         moving_arg(false), intitle(false), inbranch(false), inulemcmd(0),
-         local_font(nullptr),master_language(nullptr), encoding(enc), 
free_spacing(false),
-         use_babel(false), use_polyglossia(false), use_hyperref(false), 
use_CJK(false),
+         moving_arg(false), intitle(false), need_maketitle(false), 
have_maketitle(false),
+         inbranch(false), inulemcmd(0), 
local_font(nullptr),master_language(nullptr),
+         encoding(enc), free_spacing(false), use_babel(false), 
use_polyglossia(false),
+         use_hyperref(false), use_CJK(false),
          use_indices(false), use_japanese(false), linelen(0), depth(0),
          exportdata(new ExportData), postpone_fragile_stuff(false), 
inDisplayMath(false),
          wasDisplayMath(false), inComment(false), openbtUnit(false), 
only_childbibs(false),
diff --git a/src/OutputParams.h b/src/OutputParams.h
index 46495fe..1778321 100644
--- a/src/OutputParams.h
+++ b/src/OutputParams.h
@@ -112,6 +112,15 @@ public:
        */
        bool intitle;
 
+       /** need_maketitle == true means that the last layout was a title layout
+        * this is to track when \maketitle needs to be output.
+       */
+       mutable bool need_maketitle;
+
+       /** have_maketitle == true means that \maketitle already hase been 
output.
+       */
+       mutable bool have_maketitle;
+
        /** inbranch == true means that the environment being typeset
            is inside an active branch inset.
        */
diff --git a/src/Paragraph.cpp b/src/Paragraph.cpp
index fa99c1a..5d1a7fe 100644
--- a/src/Paragraph.cpp
+++ b/src/Paragraph.cpp
@@ -2812,6 +2812,10 @@ void Paragraph::latex(BufferParams const & bparams,
                // command is ever executed but its opening was recorded.
                runparams.inulemcmd = rp.inulemcmd;
 
+               // These need to be passed upstream as well
+               runparams.need_maketitle = rp.need_maketitle;
+               runparams.have_maketitle = rp.have_maketitle;
+
                // And finally, pass the post_macros upstream
                runparams.post_macro = rp.post_macro;
        }
diff --git a/src/insets/InsetBranch.cpp b/src/insets/InsetBranch.cpp
index 6d87af7..db987ba 100644
--- a/src/insets/InsetBranch.cpp
+++ b/src/insets/InsetBranch.cpp
@@ -311,6 +311,9 @@ void InsetBranch::latex(otexstream & os, OutputParams const 
& runparams) const
                OutputParams rp = runparams;
                rp.inbranch = true;
                InsetText::latex(os, rp);
+               // These need to be passed upstream
+               runparams.need_maketitle = rp.need_maketitle;
+               runparams.have_maketitle = rp.have_maketitle;
        }
 }
 
diff --git a/src/insets/InsetText.cpp b/src/insets/InsetText.cpp
index ac10443..ba716ae 100644
--- a/src/insets/InsetText.cpp
+++ b/src/insets/InsetText.cpp
@@ -529,6 +529,9 @@ void InsetText::latex(otexstream & os, OutputParams const & 
runparams) const
        runparams.encoding = rp.encoding;
        // Pass the post_macros upstream
        runparams.post_macro = rp.post_macro;
+       // These need to be passed upstream as well
+       runparams.need_maketitle = rp.need_maketitle;
+       runparams.have_maketitle = rp.have_maketitle;
 
        if (!il.rightdelim().empty())
                os << il.rightdelim();
diff --git a/src/output_latex.cpp b/src/output_latex.cpp
index f23fbda..d567ecc 100644
--- a/src/output_latex.cpp
+++ b/src/output_latex.cpp
@@ -1442,6 +1442,9 @@ void TeXOnePar(Buffer const & buf,
 
        // Also pass the post_macros upstream
        runparams_in.post_macro = runparams.post_macro;
+       // These need to be passed upstream as well
+       runparams_in.need_maketitle = runparams.need_maketitle;
+       runparams_in.have_maketitle = runparams.have_maketitle;
 
 
        // we don't need a newline for the last paragraph!!!
@@ -1592,9 +1595,6 @@ void latexParagraphs(Buffer const & buf,
        pit_type pit = runparams.par_begin;
        // lastpit is for the language check after the loop.
        pit_type lastpit = pit;
-       // variables used in the loop:
-       bool was_title = false;
-       bool already_title = false;
        DocumentClass const & tclass = bparams.documentClass();
 
        // Did we already warn about inTitle layout mixing? (we only warn once)
@@ -1609,7 +1609,7 @@ void latexParagraphs(Buffer const & buf,
                                tclass.plainLayout() : par->layout();
 
                if (layout.intitle) {
-                       if (already_title) {
+                       if (runparams.have_maketitle) {
                                if (!gave_layout_warning && !runparams.dryrun) {
                                        gave_layout_warning = true;
                                        frontend::Alert::warning(_("Error in 
latexParagraphs"),
@@ -1619,15 +1619,15 @@ void latexParagraphs(Buffer const & buf,
                                                          "could lead to 
missing or incorrect output."
                                                          ), layout.name()));
                                }
-                       } else if (!was_title) {
-                               was_title = true;
+                       } else if (!runparams.need_maketitle) {
+                               runparams.need_maketitle = true;
                                if (tclass.titletype() == TITLE_ENVIRONMENT) {
                                        os << "\\begin{"
                                                        << 
from_ascii(tclass.titlename())
                                                        << "}\n";
                                }
                        }
-               } else if (was_title && !already_title && !layout.inpreamble) {
+               } else if (runparams.need_maketitle && 
!runparams.have_maketitle && !layout.inpreamble) {
                        if (tclass.titletype() == TITLE_ENVIRONMENT) {
                                os << "\\end{" << from_ascii(tclass.titlename())
                                                << "}\n";
@@ -1636,8 +1636,8 @@ void latexParagraphs(Buffer const & buf,
                                os << "\\" << from_ascii(tclass.titlename())
                                                << "\n";
                        }
-                       already_title = true;
-                       was_title = false;
+                       runparams.have_maketitle = true;
+                       runparams.need_maketitle = false;
                }
 
                if (layout.isCommand() && !layout.latexname().empty()
@@ -1689,10 +1689,10 @@ void latexParagraphs(Buffer const & buf,
        }
 
        // It might be that we only have a title in this document.
-       // But if we're in a branch, this is not the end of
+       // But if we're in an inset, this is not the end of
        // the document. (There may be some other checks of this
        // kind that are needed.)
-       if (was_title && !already_title && !runparams.inbranch) {
+       if (runparams.need_maketitle && !runparams.have_maketitle && maintext) {
                if (tclass.titletype() == TITLE_ENVIRONMENT) {
                        os << "\\end{" << from_ascii(tclass.titlename())
                           << "}\n";
-- 
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