commit 6e81f317229a585e4d74b68af967873acd1f74ae
Author: Jean-Marc Lasgouttes <[email protected]>
Date:   Sun Jul 21 22:09:28 2024 +0200

    Rewrite statistics code
    
    The statistics code is known to be very slow, because it relies on
    DocIterator to go through the buffer.
    
    This commit introduces a new Statistics class that encapsulates the
    main code, along a virtual method Inset::updateStatistics() that
    allows to fine-tune how counting is done inset by inset.
    
    This is a faithful bug-for-bug reimplementation.
    
    The new code appears to be 3x faster than the old one.
    
    See bug #12929 for a discussion about statistics update woes.
---
 src/Buffer.cpp                | 106 +++----------------------------------
 src/Buffer.h                  |  12 ++---
 src/BufferView.cpp            |  34 +++++-------
 src/Makefile.am               |   2 +
 src/Statistics.cpp            | 120 ++++++++++++++++++++++++++++++++++++++++++
 src/Statistics.h              |  64 ++++++++++++++++++++++
 src/Text.cpp                  |  24 ++++-----
 src/frontends/qt/GuiView.cpp  |  23 +++-----
 src/insets/Inset.cpp          |  14 ++++-
 src/insets/Inset.h            |   6 +--
 src/insets/InsetCitation.cpp  |   6 +--
 src/insets/InsetCitation.h    |   2 +-
 src/insets/InsetHyperlink.cpp |   8 +--
 src/insets/InsetHyperlink.h   |   2 +-
 src/insets/InsetQuotes.cpp    |   5 +-
 src/insets/InsetQuotes.h      |   2 +-
 src/insets/InsetTabular.cpp   |   8 +++
 src/insets/InsetTabular.h     |   3 ++
 src/insets/InsetText.cpp      |   7 +++
 src/insets/InsetText.h        |   3 ++
 20 files changed, 275 insertions(+), 176 deletions(-)

diff --git a/src/Buffer.cpp b/src/Buffer.cpp
index e95d0edcc8..6c1619151c 100644
--- a/src/Buffer.cpp
+++ b/src/Buffer.cpp
@@ -56,7 +56,7 @@
 #include "PDFOptions.h"
 #include "Session.h"
 #include "SpellChecker.h"
-#include "xml.h"
+#include "Statistics.h"
 #include "texstream.h"
 #include "TexRow.h"
 #include "Text.h"
@@ -66,6 +66,7 @@
 #include "VCBackend.h"
 #include "version.h"
 #include "WordLangTuple.h"
+#include "xml.h"
 
 #include "insets/InsetBranch.h"
 #include "insets/InsetInclude.h"
@@ -357,10 +358,8 @@ public:
        ///
        mutable bool need_update;
 
-private:
-       int word_count_;
-       int char_count_;
-       int blank_count_;
+       ///
+       Statistics statistics_;
 
 public:
        /// This is here to force the test to be done whenever parent_buffer
@@ -395,22 +394,6 @@ public:
                        parent_buffer->invalidateBibinfoCache();
        }
 
-       /// compute statistics
-       /// \p from initial position
-       /// \p to points to the end position
-       void updateStatistics(DocIterator & from, DocIterator & to,
-                             bool skipNoOutput = true);
-       /// statistics accessor functions
-       int wordCount() const
-       {
-               return word_count_;
-       }
-       int charCount(bool with_blanks) const
-       {
-               return char_count_
-               + (with_blanks ? blank_count_ : 0);
-       }
-
        // Make sure the file monitor monitors the good file.
        void refreshFileMonitor();
 
@@ -462,8 +445,7 @@ Buffer::Impl::Impl(Buffer * owner, FileName const & file, 
bool readonly_,
          have_bibitems_(false), lyx_clean(true), bak_clean(true), 
unnamed(false),
          internal_buffer(false), read_only(readonly_), 
file_fully_loaded(false),
          need_format_backup(false), ignore_parent(false), macro_lock(false),
-         externally_modified_(false), bibinfo_cache_valid_(false),
-         need_update(false), word_count_(0), char_count_(0), blank_count_(0)
+         externally_modified_(false), bibinfo_cache_valid_(false), 
need_update(false)
 {
        refreshFileMonitor();
        if (!cloned_buffer_) {
@@ -5464,83 +5446,9 @@ void Buffer::requestSpellcheck()
 }
 
 
-void Buffer::Impl::updateStatistics(DocIterator & from, DocIterator & to, bool 
skipNoOutput)
-{
-       bool inword = false;
-       word_count_ = 0;
-       char_count_ = 0;
-       blank_count_ = 0;
-
-       for (DocIterator dit = from ; dit != to && !dit.atEnd(); ) {
-               if (!dit.inTexted()) {
-                       dit.forwardPos();
-                       continue;
-               }
-
-               Paragraph const & par = dit.paragraph();
-               pos_type const pos = dit.pos();
-
-               // Copied and adapted from isWordSeparator() in Paragraph
-               if (pos == dit.lastpos()) {
-                       inword = false;
-               } else {
-                       Inset const * ins = par.getInset(pos);
-                       if (ins && skipNoOutput && !ins->producesOutput()) {
-                               // skip this inset
-                               ++dit.top().pos();
-                               // stop if end of range was skipped
-                               if (!to.atEnd() && dit >= to)
-                                       break;
-                               continue;
-                       } else if (!par.isDeleted(pos)) {
-                               if (par.isWordSeparator(pos))
-                                       inword = false;
-                               else if (!inword) {
-                                       ++word_count_;
-                                       inword = true;
-                               }
-                               if (ins && ins->isLetter()) {
-                                       odocstringstream os;
-                                       ins->toString(os);
-                                       char_count_ += os.str().length();
-                               }
-                               else if (ins && ins->isSpace())
-                                       ++blank_count_;
-                               else if (ins) {
-                                       pair<int, int> words = ins->isWords();
-                                       char_count_ += words.first;
-                                       word_count_ += words.second;
-                                       inword = false;
-                               }
-                               else {
-                                       char_type const c = par.getChar(pos);
-                                       if (isPrintableNonspace(c))
-                                               ++char_count_;
-                                       else if (isSpace(c))
-                                               ++blank_count_;
-                               }
-                       }
-               }
-               dit.forwardPos();
-       }
-}
-
-
-void Buffer::updateStatistics(DocIterator & from, DocIterator & to, bool 
skipNoOutput) const
-{
-       d->updateStatistics(from, to, skipNoOutput);
-}
-
-
-int Buffer::wordCount() const
-{
-       return d->wordCount();
-}
-
-
-int Buffer::charCount(bool with_blanks) const
+Statistics & Buffer::statistics()
 {
-       return d->charCount(with_blanks);
+       return d->statistics_;
 }
 
 
diff --git a/src/Buffer.h b/src/Buffer.h
index d9e7e325d4..fd4d8bc8e3 100644
--- a/src/Buffer.h
+++ b/src/Buffer.h
@@ -51,6 +51,7 @@ class otexstream;
 class ParagraphList;
 class ParIterator;
 class ParConstIterator;
+class Statistics;
 class TeXErrors;
 class TexRow;
 class TocBackend;
@@ -784,15 +785,8 @@ public:
        std::string includedFilePath(std::string const & name,
                                std::string const & ext = empty_string()) const;
 
-       /// compute statistics between \p from and \p to
-       /// \p from initial position
-       /// \p to points to the end position
-       /// \p skipNoOutput if notes etc. should be ignored
-       void updateStatistics(DocIterator & from, DocIterator & to,
-                                                 bool skipNoOutput = true) 
const;
-       /// statistics accessor functions
-       int wordCount() const;
-       int charCount(bool with_blanks) const;
+       /// Count of words, characters and blanks
+       Statistics & statistics();
 
        ///
        bool areChangesPresent() const;
diff --git a/src/BufferView.cpp b/src/BufferView.cpp
index ce315a6f49..f754186d07 100644
--- a/src/BufferView.cpp
+++ b/src/BufferView.cpp
@@ -38,6 +38,7 @@
 #include "MetricsInfo.h"
 #include "Paragraph.h"
 #include "Session.h"
+#include "Statistics.h"
 #include "texstream.h"
 #include "Text.h"
 #include "TextMetrics.h"
@@ -78,6 +79,7 @@
 #include "support/Lexer.h"
 #include "support/lstrings.h"
 #include "support/lyxlib.h"
+#include "support/pmprof.h"
 #include "support/types.h"
 
 #include <algorithm>
@@ -2006,18 +2008,11 @@ void BufferView::dispatch(FuncRequest const & cmd, 
DispatchResult & dr)
        }
 
        case LFUN_STATISTICS: {
-               DocIterator from, to;
-               if (cur.selection()) {
-                       from = cur.selectionBegin();
-                       to = cur.selectionEnd();
-               } else {
-                       from = doc_iterator_begin(&buffer_);
-                       to = doc_iterator_end(&buffer_);
-               }
-               buffer_.updateStatistics(from, to);
-               int const words = buffer_.wordCount();
-               int const chars = buffer_.charCount(false);
-               int const chars_blanks = buffer_.charCount(true);
+               Statistics & stats = buffer_.statistics();
+               stats.update(cur);
+               int const words = stats.word_count;
+               int const chars = stats.char_count;
+               int const chars_blanks = chars + stats.blank_count;
                docstring message;
                if (cur.selection())
                        message = _("Statistics for the selection:");
@@ -2040,8 +2035,8 @@ void BufferView::dispatch(FuncRequest const & cmd, 
DispatchResult & dr)
                        message += _("One character (no blanks)");
 
                Alert::information(_("Statistics"), message);
-       }
                break;
+       }
 
        case LFUN_STATISTICS_REFERENCE_CLAMP: {
                d->stats_update_trigger_ = true;
@@ -2050,14 +2045,11 @@ void BufferView::dispatch(FuncRequest const & cmd, 
DispatchResult & dr)
                        break;
                }
 
-               DocIterator from, to;
-               from = doc_iterator_begin(&buffer_);
-               to = doc_iterator_end(&buffer_);
-               buffer_.updateStatistics(from, to);
-
-               d->stats_ref_value_w_ = buffer_.wordCount();
-               d->stats_ref_value_c_ = buffer_.charCount(true);
-               d->stats_ref_value_nb_ = buffer_.charCount(false);
+               Statistics & stats = buffer_.statistics();
+               stats.update(cur);
+               d->stats_ref_value_w_ = stats.word_count;
+               d->stats_ref_value_c_ = stats.char_count; + stats.blank_count;
+               d->stats_ref_value_nb_ = stats.char_count;
                break;
        }
 
diff --git a/src/Makefile.am b/src/Makefile.am
index d6c9a0cb18..fa1161b71a 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -173,6 +173,7 @@ SOURCEFILESCORE = \
        ServerSocket.cpp \
        Session.cpp \
        Spacing.cpp \
+       Statistics.cpp \
        TexRow.cpp \
        texstream.cpp \
        Text.cpp \
@@ -277,6 +278,7 @@ HEADERFILESCORE = \
        Session.h \
        Spacing.h \
        SpellChecker.h \
+       Statistics.h \
        TexRow.h \
        texstream.h \
        Text.h \
diff --git a/src/Statistics.cpp b/src/Statistics.cpp
new file mode 100644
index 0000000000..eabae8f399
--- /dev/null
+++ b/src/Statistics.cpp
@@ -0,0 +1,120 @@
+// -*- C++ -*-
+/**
+ * \file Statistics.cpp
+ * This file is part of LyX, the document processor.
+ * Licence details can be found in the file COPYING.
+ *
+ * \author Jean-Marc Lasgouttes
+ *
+ * Full author contact details are available in file CREDITS.
+ */
+
+#include <config.h>
+
+#include "Statistics.h"
+
+#include "Paragraph.h"
+#include "Text.h"
+#include "Cursor.h"
+
+#include "support/lassert.h"
+#include "support/lstrings.h"
+#include "support/textutils.h"
+
+
+namespace lyx {
+
+using namespace support;
+
+
+void Statistics::update(CursorData const & cur)
+{
+       // reset counts
+       *this = Statistics();
+       if (cur.selection()) {
+               if (cur.inMathed())
+                       return;
+               CursorSlice from, to;
+               from = cur.selBegin();
+               to = cur.selEnd();
+               update(from, to);
+       } else
+               update(*cur.bottom().text());
+}
+
+
+void Statistics::update(docstring const & s)
+{
+       // FIXME: use a stripped-down version of the paragraph code.
+       // This is the original code from InsetCitation::isWords()
+       char_count += s.size();
+       // FIXME: this does not count words properly
+       word_count += wordCount(s);
+       // FIXME: spaces are not counted
+}
+
+
+void Statistics::update(Text const & text)
+{
+       for (Paragraph const & par : text.paragraphs())
+               update(par);
+}
+
+
+void Statistics::update(CursorSlice const & from, CursorSlice & to)
+{
+       LASSERT(from.text() == to.text(), return);
+       if (from.idx() == to.idx()) {
+               if (from.pit() == to.pit()) {
+                       update(from.paragraph(), from.pos(), to.pos());
+               } else {
+                       pos_type frompos = from.pos();
+                       for (pit_type pit = from.pit() ; pit < to.pit() ; 
++pit) {
+                               update(from.text()->getPar(pit), frompos);
+                               frompos = 0;
+                       }
+                       update(to.paragraph(), 0, to.pos());
+               }
+       } else
+               for (idx_type idx = from.idx() ; idx <= to.idx(); ++idx)
+                       update(*from.inset().getText(idx));
+}
+
+
+void Statistics::update(Paragraph const & par, pos_type from, pos_type to)
+{
+       if (to == -1)
+               to = par.size();
+
+       for (pos_type pos = from ; pos < to ; ++pos) {
+               Inset const * ins = par.isInset(pos) ? par.getInset(pos) : 
nullptr;
+               // Stuff that we skip
+               if (par.isDeleted(pos))
+                       continue;
+               if (ins && skip_no_output && !ins->producesOutput())
+                       continue;
+
+               // words
+               if (par.isWordSeparator(pos))
+                       inword = false;
+               else if (!inword) {
+                       ++word_count;
+                       inword = true;
+               }
+
+               if (ins)
+                       ins->updateStatistics(*this);
+               else {
+                       char_type const c = par.getChar(pos);
+                       if (isPrintableNonspace(c))
+                               ++char_count;
+                       else if (lyx::isSpace(c))
+                               ++blank_count;
+               }
+       }
+       inword = false;
+}
+
+
+} // namespace lyx
+
diff --git a/src/Statistics.h b/src/Statistics.h
new file mode 100644
index 0000000000..7439de06cf
--- /dev/null
+++ b/src/Statistics.h
@@ -0,0 +1,64 @@
+// -*- C++ -*-
+/**
+ * \file Statistics.h
+ * This file is part of LyX, the document processor.
+ * Licence details can be found in the file COPYING.
+ *
+ * \author Jean-Marc Lasgouttes
+ *
+ * Full author contact details are available in file CREDITS.
+ */
+
+#ifndef STATISTICS_H
+#define STATISTICS_H
+
+#include "support/strfwd.h"
+#include "support/types.h"
+
+namespace lyx {
+
+class CursorData;
+class CursorSlice;
+class Text;
+class Paragraph;
+
+// Class used to compute letters/words statistics on buffer or selection
+class Statistics {
+public:
+       // Number of words
+       int word_count = 0;
+       // Number of non blank characters
+       int char_count = 0;
+       // Number of blank characters
+       int blank_count = 0;
+       // Indicate whether parts that are not output should be counted.
+       bool skip_no_output = true;
+
+       /// Count characters in the whole document, or in the selection if
+       /// there is one. This is the main entry point.
+       void update(CursorData const & cur);
+       ///  Count chars and words in this string
+       void update(docstring const & s);
+       /// Count chars and words in the paragraphs of \c text
+       void update(Text const & text);
+
+private:
+
+       /// Count chars and words between two positions
+       void update(CursorSlice const & from, CursorSlice & to);
+
+       /** Count chars and words in a paragraph
+        * \param par: the paragraph
+        * \param from: starting position
+        * \param to: end position. If it is equal to -1, then the end is
+        *    the end of the paragraph.
+        */
+       void update(Paragraph const & par, pos_type from = 0, pos_type to = -1);
+
+       // Used in the code to track status
+       bool inword = false;
+};
+
+}
+
+#endif // STATISTICS_H
diff --git a/src/Text.cpp b/src/Text.cpp
index c61bb8f812..2ec8f4905a 100644
--- a/src/Text.cpp
+++ b/src/Text.cpp
@@ -52,6 +52,7 @@
 #include "Paragraph.h"
 #include "ParagraphParameters.h"
 #include "SpellChecker.h"
+#include "Statistics.h"
 #include "TextClass.h"
 #include "TextMetrics.h"
 #include "Thesaurus.h"
@@ -6328,27 +6329,20 @@ void Text::dispatch(Cursor & cur, FuncRequest & cmd)
                break;
 
        case LFUN_SERVER_GET_STATISTICS: {
-               DocIterator from, to;
-               if (cur.selection()) {
-                       from = cur.selectionBegin();
-                       to = cur.selectionEnd();
-               } else {
-                       from = doc_iterator_begin(cur.buffer());
-                       to = doc_iterator_end(cur.buffer());
-               }
+               Statistics & stats = cur.buffer()->statistics();
+               stats.update(cur);
 
-               cur.buffer()->updateStatistics(from, to);
                string const arg0 = cmd.getArg(0);
                if (arg0 == "words") {
-                       
cur.message(convert<docstring>(cur.buffer()->wordCount()));
+                       cur.message(convert<docstring>(stats.word_count));
                } else if (arg0 == "chars") {
-                       
cur.message(convert<docstring>(cur.buffer()->charCount(false)));
+                       cur.message(convert<docstring>(stats.char_count));
                } else if (arg0 == "chars-space") {
-                       
cur.message(convert<docstring>(cur.buffer()->charCount(true)));
+                       cur.message(convert<docstring>(stats.char_count + 
stats.blank_count));
                } else {
-                       
cur.message(convert<docstring>(cur.buffer()->wordCount()) + " "
-                       + convert<docstring>(cur.buffer()->charCount(false)) + 
" "
-                       + convert<docstring>(cur.buffer()->charCount(true)));
+                       cur.message(convert<docstring>(stats.word_count) + " "
+                       + convert<docstring>(stats.char_count) + " "
+                       + convert<docstring>(stats.char_count + 
stats.blank_count));
                }
                break;
        }
diff --git a/src/frontends/qt/GuiView.cpp b/src/frontends/qt/GuiView.cpp
index 3b24846852..a6b48b3053 100644
--- a/src/frontends/qt/GuiView.cpp
+++ b/src/frontends/qt/GuiView.cpp
@@ -60,8 +60,9 @@
 #include "LyXRC.h"
 #include "LyXVC.h"
 #include "Paragraph.h"
-#include "SpellChecker.h"
 #include "Session.h"
+#include "SpellChecker.h"
+#include "Statistics.h"
 #include "TexRow.h"
 #include "Text.h"
 #include "Toolbars.h"
@@ -1478,31 +1479,21 @@ void GuiView::showStats()
        if (d.time_to_update > 0)
                return;
 
-       DocIterator from, to;
-       if (cur.selection()) {
-               from = cur.selectionBegin();
-               to = cur.selectionEnd();
-               d.already_in_selection_ = true;
-       } else {
-               from = doc_iterator_begin(buf);
-               to = doc_iterator_end(buf);
-               d.already_in_selection_ = false;
-       }
-
        // Don't attempt to calculate stats if
        // the buffer is busy as this might crash (#12935)
+       Statistics & statistics = buf->statistics();
        if (!busy() && !bv->busy())
-               buf->updateStatistics(from, to);
+               statistics.update(cur);
 
        QStringList stats;
        if (word_count_enabled_) {
-               int const words = buf->wordCount() - bv->stats_ref_value_w();
+               int const words = statistics.word_count - 
bv->stats_ref_value_w();
                if (words == 1)
                        stats << toqstr(bformat(_("%1$d Word"), words));
                else
                        stats << toqstr(bformat(_("%1$d Words"), words));
        }
-       int const chars_with_blanks = buf->charCount(true);
+       int const chars_with_blanks = statistics.char_count + 
statistics.blank_count;
        if (char_count_enabled_) {
                int const chars_with_blanks_disp = chars_with_blanks - 
bv->stats_ref_value_c();
                if (chars_with_blanks == 1)
@@ -1511,7 +1502,7 @@ void GuiView::showStats()
                        stats << toqstr(bformat(_("%1$d Characters"), 
chars_with_blanks_disp));
        }
        if (char_nb_count_enabled_) {
-               int const chars = buf->charCount(false) - 
bv->stats_ref_value_nb();
+               int const chars = statistics.char_count - 
bv->stats_ref_value_nb();
                if (chars == 1)
                        stats << toqstr(bformat(_("%1$d Character (no 
Blanks)"), chars));
                else
diff --git a/src/insets/Inset.cpp b/src/insets/Inset.cpp
index b949f9c989..c3efc2b5f2 100644
--- a/src/insets/Inset.cpp
+++ b/src/insets/Inset.cpp
@@ -30,10 +30,11 @@
 #include "InsetLayout.h"
 #include "MetricsInfo.h"
 #include "output_xhtml.h"
-#include "xml.h"
+#include "Statistics.h"
 #include "Text.h"
 #include "TextClass.h"
 #include "TocBackend.h"
+#include "xml.h"
 
 #include "frontends/Application.h"
 #include "frontends/Painter.h"
@@ -626,6 +627,17 @@ bool Inset::undefined() const
 }
 
 
+void Inset::updateStatistics(Statistics & stats) const
+{
+       if (isLetter()) {
+               odocstringstream os;
+               toString(os);
+               stats.char_count += os.str().length();
+       } else if (isSpace())
+               ++stats.blank_count;
+}
+
+
 CtObject Inset::getCtObject(OutputParams const &) const
 {
        return CtObject::Normal;
diff --git a/src/insets/Inset.h b/src/insets/Inset.h
index ea8f00e38c..4340c1f2a0 100644
--- a/src/insets/Inset.h
+++ b/src/insets/Inset.h
@@ -60,6 +60,7 @@ class MathAtom;
 class MetricsInfo;
 class PainterInfo;
 class ParIterator;
+class Statistics;
 class Text;
 class TocBackend;
 class XMLStream;
@@ -480,9 +481,8 @@ public:
        /// is this equivalent to a space (which is BTW different from
        /// a line separator)?
        virtual bool isSpace() const { return false; }
-       /// returns chars, words if the inset is equivalent to such, otherwise
-       /// (0,0), which should be interpreted as 'false'
-       virtual std::pair<int, int> isWords() const { return 
std::pair<int,int>(0, 0); }
+       /// Count words, characters and spaces in inset
+       virtual void updateStatistics(Statistics & stats) const;
        /// does this inset try to use all available space (like \\hfill does)?
        virtual bool isHfill() const { return false; }
 
diff --git a/src/insets/InsetCitation.cpp b/src/insets/InsetCitation.cpp
index 87130462e0..8dc71541bb 100644
--- a/src/insets/InsetCitation.cpp
+++ b/src/insets/InsetCitation.cpp
@@ -29,6 +29,7 @@
 #include "output_xhtml.h"
 #include "output_docbook.h"
 #include "ParIterator.h"
+#include "Statistics.h"
 #include "texstream.h"
 #include "TocBackend.h"
 
@@ -791,10 +792,9 @@ void InsetCitation::latex(otexstream & os, OutputParams 
const & runparams) const
 }
 
 
-pair<int, int> InsetCitation::isWords() const
+void InsetCitation::updateStatistics(Statistics & stats) const
 {
-       docstring const label = generateLabel(false);
-       return pair<int, int>(label.size(), wordCount(label));
+       stats.update(generateLabel(false));
 }
 
 
diff --git a/src/insets/InsetCitation.h b/src/insets/InsetCitation.h
index b1b27e0291..30e78013dc 100644
--- a/src/insets/InsetCitation.h
+++ b/src/insets/InsetCitation.h
@@ -104,7 +104,7 @@ public:
        /// search and open citation source
        void openCitation();
        ///
-       std::pair<int, int> isWords() const override;
+       void updateStatistics(Statistics & stats) const override;
 
 private:
        /// tries to make a pretty label and makes a basic one if not
diff --git a/src/insets/InsetHyperlink.cpp b/src/insets/InsetHyperlink.cpp
index dcdcbbb8e1..017845622e 100644
--- a/src/insets/InsetHyperlink.cpp
+++ b/src/insets/InsetHyperlink.cpp
@@ -20,8 +20,9 @@
 #include "LyX.h"
 #include "output_docbook.h"
 #include "output_xhtml.h"
-#include "xml.h"
+#include "Statistics.h"
 #include "texstream.h"
+#include "xml.h"
 
 #include "support/debug.h"
 #include "support/docstream.h"
@@ -299,10 +300,9 @@ void InsetHyperlink::validate(LaTeXFeatures & features) 
const
 }
 
 
-pair<int, int> InsetHyperlink::isWords() const
+void InsetHyperlink::updateStatistics(Statistics & stats) const
 {
-       docstring const label = getParam("name");
-       return pair<int, int>(label.size(), wordCount(label));
+       stats.update(getParam("name"));
 }
 
 
diff --git a/src/insets/InsetHyperlink.h b/src/insets/InsetHyperlink.h
index 36bd249902..cdf1d2e9ca 100644
--- a/src/insets/InsetHyperlink.h
+++ b/src/insets/InsetHyperlink.h
@@ -55,7 +55,7 @@ public:
        ///
        docstring xhtml(XMLStream &, OutputParams const &) const override;
        ///
-       std::pair<int, int> isWords() const override;
+       void updateStatistics(Statistics & stats) const override;
        //@}
 
        /// \name Static public methods obligated for InsetCommand derived 
classes
diff --git a/src/insets/InsetQuotes.cpp b/src/insets/InsetQuotes.cpp
index 8d6caf1e5e..06bace7b25 100644
--- a/src/insets/InsetQuotes.cpp
+++ b/src/insets/InsetQuotes.cpp
@@ -28,6 +28,7 @@
 #include "MetricsInfo.h"
 #include "Paragraph.h"
 #include "ParIterator.h"
+#include "Statistics.h"
 #include "texstream.h"
 #include "xml.h"
 
@@ -1032,7 +1033,7 @@ string InsetQuotes::contextMenuName() const
 }
 
 
-pair<int, int> InsetQuotes::isWords() const
+void InsetQuotes::updateStatistics(Statistics & stats) const
 {
        int length = 1;
        // In PassThru, we use straight quotes otherwise we need to check for 
French
@@ -1052,7 +1053,7 @@ pair<int, int> InsetQuotes::isWords() const
        }
 
        //one or two characters from the statistics perspective
-       return std::pair<int,int>(length, 0);
+       stats.char_count += length;
 }
 
 } // namespace lyx
diff --git a/src/insets/InsetQuotes.h b/src/insets/InsetQuotes.h
index 13bd8ea124..fdf69c1b13 100644
--- a/src/insets/InsetQuotes.h
+++ b/src/insets/InsetQuotes.h
@@ -178,7 +178,7 @@ public:
        /// Returns the current quote type
        std::string getType() const;
        ///
-       std::pair<int, int> isWords() const override;
+       void updateStatistics(Statistics & stats) const override;
 
 private:
        ///
diff --git a/src/insets/InsetTabular.cpp b/src/insets/InsetTabular.cpp
index 74a0060aaf..6f1b470ea7 100644
--- a/src/insets/InsetTabular.cpp
+++ b/src/insets/InsetTabular.cpp
@@ -45,6 +45,7 @@
 #include "output_xhtml.h"
 #include "Paragraph.h"
 #include "ParIterator.h"
+#include "Statistics.h"
 #include "TexRow.h"
 #include "texstream.h"
 #include "TextClass.h"
@@ -5017,6 +5018,13 @@ void InsetTabular::updateBuffer(ParIterator const & it, 
UpdateType utype, bool c
 }
 
 
+void InsetTabular::updateStatistics(Statistics & stats) const
+{
+       for (idx_type idx = 0 ; idx < nargs(); ++idx)
+               stats.update(*getText(idx));
+}
+
+
 void InsetTabular::addToToc(DocIterator const & cpit, bool output_active,
                                                        UpdateType utype, 
TocBackend & backend) const
 {
diff --git a/src/insets/InsetTabular.h b/src/insets/InsetTabular.h
index f6939c6eff..8b052c5d73 100644
--- a/src/insets/InsetTabular.h
+++ b/src/insets/InsetTabular.h
@@ -1113,9 +1113,12 @@ public:
        Inset * editXY(Cursor & cur, int x, int y) override;
        /// can we go further down on mouse click?
        bool descendable(BufferView const &) const override { return true; }
+
        /// Update the counters of this inset and of its contents
        void updateBuffer(ParIterator const &, UpdateType, bool const deleted = 
false) override;
        ///
+       void updateStatistics(Statistics & stats) const;
+       ///
        void addToToc(DocIterator const & di, bool output_active,
                                  UpdateType utype, TocBackend & backend) const 
override;
 
diff --git a/src/insets/InsetText.cpp b/src/insets/InsetText.cpp
index ac3bc8e102..8a3109947f 100644
--- a/src/insets/InsetText.cpp
+++ b/src/insets/InsetText.cpp
@@ -50,6 +50,7 @@
 #include "Paragraph.h"
 #include "ParagraphParameters.h"
 #include "ParIterator.h"
+#include "Statistics.h"
 #include "TexRow.h"
 #include "texstream.h"
 #include "TextClass.h"
@@ -1141,6 +1142,12 @@ void InsetText::updateBuffer(ParIterator const & it, 
UpdateType utype, bool cons
 }
 
 
+void InsetText::updateStatistics(Statistics & stats) const
+{
+               stats.update(text());
+}
+
+
 void InsetText::toString(odocstream & os) const
 {
        os << text().asString(0, 1, AS_STR_LABEL | AS_STR_INSETS);
diff --git a/src/insets/InsetText.h b/src/insets/InsetText.h
index 423735a032..f46bf1bbfe 100644
--- a/src/insets/InsetText.h
+++ b/src/insets/InsetText.h
@@ -177,6 +177,9 @@ public:
 
        /// Update the counters of this inset and of its contents
        void updateBuffer(ParIterator const &, UpdateType, bool const deleted = 
false) override;
+       ///
+       void updateStatistics(Statistics & stats) const override;
+
        ///
        void setMacrocontextPositionRecursive(DocIterator const & pos);
        ///
-- 
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