sw/inc/ndtxt.hxx | 2
sw/source/core/doc/DocumentContentOperationsManager.cxx | 55 ++++++++++++++--
sw/source/core/txtnode/txtedt.cxx | 6 -
3 files changed, 54 insertions(+), 9 deletions(-)
New commits:
commit e463d239555d3a4dc61797eeb8c638b6442112a3
Author: Balazs Santha <santha.bal...@simonyi.bme.hu>
AuthorDate: Fri Feb 26 08:06:03 2021 -0500
Commit: László Németh <nem...@numbertext.org>
CommitDate: Wed Mar 24 15:08:18 2021 +0100
tdf#140731: sw transliteration: avoid too many redlines
As a workaround for the performance regression
from commit 2d3c77e9b10f20091ef338e262ba7756eb280ce9
(tdf#109266 sw change tracking: track transliteration),
switch off redlining to avoid ~freezing, if a single
transliteration could result too many (>~500) redlines.
A single transliteration creates n redlines
for n paragraphs of the selected text, except in
the case of transliterating to title case, where it
creates n redlines for n words. It's very easy
to freeze Writer, because Writer's slowing down with
n redlines is described by an O(n²) (quadratic) time
complexity. Eg. in an experiment, title casing
~660 words was 6 sec, but ~3000 words was 85 sec,
regarding to creating 660 vs 3000 redlines.
Note: this is a partial revert of commit
2d3c77e9b10f20091ef338e262ba7756eb280ce9, if the
selection contains more than 500 paragraphs (or in the
case transliterating to title case, ~500 words).
Change-Id: Iad98943cc9e1ed64aa9779e49ee3e941abad02ac
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/111637
Tested-by: Jenkins
Tested-by: László Németh <nem...@numbertext.org>
Reviewed-by: László Németh <nem...@numbertext.org>
diff --git a/sw/inc/ndtxt.hxx b/sw/inc/ndtxt.hxx
index 5dbbbc721f37..50986f3daca7 100644
--- a/sw/inc/ndtxt.hxx
+++ b/sw/inc/ndtxt.hxx
@@ -746,7 +746,7 @@ public:
/// change text to Upper/Lower/Hiragana/Katakana/...
void TransliterateText( utl::TransliterationWrapper& rTrans,
sal_Int32 nStart, sal_Int32 nEnd,
- SwUndoTransliterate* pUndo );
+ SwUndoTransliterate* pUndo, bool bUseRedlining =
false );
/// count words in given range - returns true if we refreshed out count
bool CountWords( SwDocStat& rStat, sal_Int32 nStart, sal_Int32 nEnd )
const;
diff --git a/sw/source/core/doc/DocumentContentOperationsManager.cxx
b/sw/source/core/doc/DocumentContentOperationsManager.cxx
index b9846d852a2a..e66ed8e4a673 100644
--- a/sw/source/core/doc/DocumentContentOperationsManager.cxx
+++ b/sw/source/core/doc/DocumentContentOperationsManager.cxx
@@ -74,6 +74,8 @@
#include <sal/log.hxx>
#include <unotools/charclass.hxx>
#include <unotools/configmgr.hxx>
+#include <unotools/transliterationwrapper.hxx>
+#include <i18nutil/transliteration.hxx>
#include <sfx2/Metadatable.hxx>
#include <sot/exchange.hxx>
#include <svl/stritem.hxx>
@@ -2821,6 +2823,44 @@ void DocumentContentOperationsManager::TransliterateText(
}
}
+ bool bUseRedlining = m_rDoc.getIDocumentRedlineAccess().IsRedlineOn();
+ // as a workaround for a known performance problem, switch off redlining
+ // to avoid freezing, if transliteration could result too many redlines
+ if ( bUseRedlining )
+ {
+ const sal_uLong nMaxRedlines = 500;
+ const bool bIsTitleCase = rTrans.getType() ==
TransliterationFlags::TITLE_CASE;
+ sal_uLong nAffectedNodes = 0;
+ sal_uLong nAffectedChars = nEndCnt;
+ SwNodeIndex aIdx( pStt->nNode );
+ for( ; aIdx.GetIndex() <= nEndNd; ++aIdx )
+ {
+ SwTextNode* pAffectedNode = aIdx.GetNode().GetTextNode();
+
+ // don't count not text nodes or empty text nodes
+ if( !pAffectedNode || pAffectedNode->GetText().isEmpty() )
+ continue;
+
+ nAffectedNodes++;
+
+ // count characters of the node (the last - maybe partially
+ // selected - node was counted at initialization of nAffectedChars)
+ if( aIdx.GetIndex() < nEndNd )
+ nAffectedChars += pAffectedNode->GetText().getLength();
+
+ // transliteration creates n redlines for n nodes, except in the
+ // case of title case, where it creates n redlines for n words
+ if( nAffectedNodes > nMaxRedlines ||
+ // estimate word count based on the character count, where
+ // 6 = average English word length is ~5 letters + space
+ ( bIsTitleCase && (nAffectedChars - nSttCnt)/6 >
nMaxRedlines ) )
+ {
+ bUseRedlining = false;
+ break;
+ }
+ }
+ }
+
if( nSttNd != nEndNd ) // is more than one text node involved?
{
// iterate over all effected text nodes, the first and the last one
@@ -2831,8 +2871,10 @@ void DocumentContentOperationsManager::TransliterateText(
{
++aIdx;
if( pTNd )
+ {
pTNd->TransliterateText(
- rTrans, nSttCnt, pTNd->GetText().getLength(),
pUndo.get());
+ rTrans, nSttCnt, pTNd->GetText().getLength(),
pUndo.get(), bUseRedlining);
+ }
}
for( ; aIdx.GetIndex() < nEndNd; ++aIdx )
@@ -2841,16 +2883,19 @@ void
DocumentContentOperationsManager::TransliterateText(
if (pTNd)
{
pTNd->TransliterateText(
- rTrans, 0, pTNd->GetText().getLength(), pUndo.get());
+ rTrans, 0, pTNd->GetText().getLength(), pUndo.get(),
bUseRedlining);
}
}
if( nEndCnt && nullptr != ( pTNd = pEnd->nNode.GetNode().GetTextNode()
))
- pTNd->TransliterateText( rTrans, 0, nEndCnt, pUndo.get() );
+ {
+ pTNd->TransliterateText( rTrans, 0, nEndCnt, pUndo.get(),
bUseRedlining );
+ }
}
else if( pTNd && nSttCnt < nEndCnt )
- pTNd->TransliterateText( rTrans, nSttCnt, nEndCnt, pUndo.get() );
-
+ {
+ pTNd->TransliterateText( rTrans, nSttCnt, nEndCnt, pUndo.get(),
bUseRedlining );
+ }
if( pUndo && pUndo->HasData() )
{
m_rDoc.GetIDocumentUndoRedo().AppendUndo(std::move(pUndo));
diff --git a/sw/source/core/txtnode/txtedt.cxx
b/sw/source/core/txtnode/txtedt.cxx
index ba25c5fccba1..e734e471060b 100644
--- a/sw/source/core/txtnode/txtedt.cxx
+++ b/sw/source/core/txtnode/txtedt.cxx
@@ -1684,7 +1684,7 @@ namespace
void SwTextNode::TransliterateText(
utl::TransliterationWrapper& rTrans,
sal_Int32 nStt, sal_Int32 nEnd,
- SwUndoTransliterate* pUndo )
+ SwUndoTransliterate* pUndo, bool bUseRedlining )
{
if (nStt >= nEnd)
return;
@@ -1908,7 +1908,7 @@ void SwTextNode::TransliterateText(
// now apply the changes from end to start to leave the offsets of the
// yet unchanged text parts remain the same.
size_t nSum(0);
- bool bIsRedlineOn(GetDoc().getIDocumentRedlineAccess().IsRedlineOn());
+
for (size_t i = 0; i < aChanges.size(); ++i)
{ // check this here since AddChanges cannot be moved below
// call to ReplaceTextOnly
@@ -1922,7 +1922,7 @@ void SwTextNode::TransliterateText(
return;
}
- if ( bIsRedlineOn )
+ if ( bUseRedlining )
{
// create SwPaM with mark & point spanning the attributed text
//SwPaM aCurPaM( *this, *this, nBegin, nBegin + nLen ); <-- wrong
c-tor, does sth different
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