sw/CppunitTest_sw_core_text.mk      |    1 
 sw/qa/core/text/itrpaint.cxx        |   37 ++++++++++++++++++++-------------
 sw/source/core/inc/drawfont.hxx     |    4 +++
 sw/source/core/text/inftxt.cxx      |    5 ++++
 sw/source/core/text/inftxt.hxx      |    2 +
 sw/source/core/text/itrpaint.cxx    |   40 ++++++++++++++++++++++++++++++++++++
 sw/source/core/txtnode/fntcache.cxx |   19 +++++++++++++++++
 sw/source/uibase/app/swmodul1.cxx   |   31 ++++++---------------------
 8 files changed, 101 insertions(+), 38 deletions(-)

New commits:
commit 45626250f9ca9e51e53a1bfa78c6ebf0f2e101a6
Author:     Miklos Vajna <[email protected]>
AuthorDate: Thu Jan 15 09:27:37 2026 +0100
Commit:     Adolfo Jayme Barrientos <[email protected]>
CommitDate: Thu Jan 15 22:58:01 2026 +0100

    cool#13574 sw redline render mode: avoid coloring, set lightness
    
    User A managed to format a piece of text as red, formatted with
    underline and then user B is now confused why rejecting this tracked
    change doesn't work.
    
    This is working as intended for the normal redline render mode, but we
    can try something different for the 'omit insert/delete' redline render
    mode: when showing the old version, we can render deletes unchanged and
    when showing the new version, we can render inserts unchanged. The rest
    of the redlines can be semi-hidden.
    
    That semi-hidden is a bit tricky to provide. Now that we don't add
    layout-level colors in SwModule::GetInsertAuthorAttr(), we go with
    automatic color, which gets resolved quite late. So first figure out if
    we need to "omit" (semi-hide) the current redline portion in
    SwTextPainter::DrawTextLine(), and then pass around a flag, so that once
    SwFntObj::DrawText() is past ApplyAutoColor(), we can set lightness to a
    medium value.
    
    This is needed, because a typical auto color resolves to either white or
    black, and changing saturation has no effect for those colors. And this
    way we still get readable text in both light and dark mode.
    
    Change-Id: I0ff57cd996fda80fadc315ad0c6c85e5af1ff3e7
    Reviewed-on: https://gerrit.libreoffice.org/c/core/+/197350
    Reviewed-by: Miklos Vajna <[email protected]>
    Tested-by: Jenkins
    (cherry picked from commit a24dd7b1d742ccd59768db8b6b6a522588952108)
    Reviewed-on: https://gerrit.libreoffice.org/c/core/+/197390
    Reviewed-by: Adolfo Jayme Barrientos <[email protected]>

diff --git a/sw/CppunitTest_sw_core_text.mk b/sw/CppunitTest_sw_core_text.mk
index bb6fba294df4..42be7e727b0c 100644
--- a/sw/CppunitTest_sw_core_text.mk
+++ b/sw/CppunitTest_sw_core_text.mk
@@ -34,6 +34,7 @@ $(eval $(call gb_CppunitTest_use_libraries,sw_core_text, \
     sfx \
     subsequenttest \
     svl \
+    svt \
     sw \
        swqahelper \
     test \
diff --git a/sw/qa/core/text/itrpaint.cxx b/sw/qa/core/text/itrpaint.cxx
index 7eaed14187c8..a59960616d68 100644
--- a/sw/qa/core/text/itrpaint.cxx
+++ b/sw/qa/core/text/itrpaint.cxx
@@ -12,10 +12,13 @@
 #include <memory>
 
 #include <o3tl/string_view.hxx>
+#include <svtools/colorcfg.hxx>
 
 #include <docsh.hxx>
 #include <wrtsh.hxx>
 #include <ndtxt.hxx>
+#include <swmodule.hxx>
+#include <swdll.hxx>
 
 namespace
 {
@@ -29,8 +32,8 @@ public:
     }
 };
 
-/// #RRGGBB -> HSL saturation.
-sal_Int16 GetColorSaturation(std::u16string_view rRGB)
+/// #RRGGBB -> HSL lightness.
+sal_Int16 GetColorLightness(std::u16string_view rRGB)
 {
     Color aColor(o3tl::toInt32(rRGB.substr(1, 2), 16), 
o3tl::toInt32(rRGB.substr(3, 2), 16),
                  o3tl::toInt32(rRGB.substr(5, 2), 16));
@@ -38,12 +41,16 @@ sal_Int16 GetColorSaturation(std::u16string_view rRGB)
     sal_uInt16 nSaturation;
     sal_uInt16 nBrightness;
     aColor.RGBtoHSB(nHue, nSaturation, nBrightness);
-    return nSaturation;
+    return nBrightness;
 }
 
 CPPUNIT_TEST_FIXTURE(Test, testRedlineRenderModeOmitInsertDelete)
 {
-    // Default rendering: default, normal saturation, normal saturation.
+    // Reset redline author IDs to a predictable default.
+    SwGlobals::ensure();
+    SwModule::get()->ClearRedlineAuthors();
+
+    // Default rendering: default, normal lightness, normal lightness.
     createSwDoc("redline.docx");
 
     SwDocShell* pDocShell = getSwDocShell();
@@ -64,15 +71,17 @@ CPPUNIT_TEST_FIXTURE(Test, 
testRedlineRenderModeOmitInsertDelete)
     CPPUNIT_ASSERT_EQUAL(u"oldcontent"_ustr, aContent.copy(nIndex2, nLength2));
     OUString aColor2
         = getXPath(pXmlDoc, 
"(//textarray)[2]/preceding-sibling::textcolor[1]", "color");
-    CPPUNIT_ASSERT_GREATER(static_cast<sal_Int16>(50), 
GetColorSaturation(aColor2));
+    Color aRedlineColor = 
SwModule::get()->GetColorConfig().GetColorValue(svtools::AUTHOR1).nColor;
+    OUString aRedlineColorString = u"#"_ustr + aRedlineColor.AsRGBHexString();
+    CPPUNIT_ASSERT_EQUAL(aRedlineColorString, aColor2);
     sal_Int32 nIndex3 = getXPath(pXmlDoc, "(//textarray)[3]", 
"index").toInt32();
     sal_Int32 nLength3 = getXPath(pXmlDoc, "(//textarray)[3]", 
"length").toInt32();
     CPPUNIT_ASSERT_EQUAL(u"newcontent"_ustr, aContent.copy(nIndex3, nLength3));
     OUString aColor3
         = getXPath(pXmlDoc, 
"(//textarray)[3]/preceding-sibling::textcolor[1]", "color");
-    CPPUNIT_ASSERT_GREATER(static_cast<sal_Int16>(50), 
GetColorSaturation(aColor3));
+    CPPUNIT_ASSERT_EQUAL(aRedlineColorString, aColor3);
 
-    // Omit inserts: default, normal saturation, de-saturated.
+    // Omit inserts: default, normal lightness, increased lightness.
     SwWrtShell* pWrtShell = pDocShell->GetWrtShell();
     SwViewOption aOpt(*pWrtShell->GetViewOptions());
     aOpt.SetRedlineRenderMode(SwRedlineRenderMode::OmitInserts);
@@ -91,16 +100,16 @@ CPPUNIT_TEST_FIXTURE(Test, 
testRedlineRenderModeOmitInsertDelete)
     nLength2 = getXPath(pXmlDoc, "(//textarray)[2]", "length").toInt32();
     CPPUNIT_ASSERT_EQUAL(u"oldcontent"_ustr, aContent.copy(nIndex2, nLength2));
     aColor2 = getXPath(pXmlDoc, 
"(//textarray)[2]/preceding-sibling::textcolor[1]", "color");
-    CPPUNIT_ASSERT_GREATER(static_cast<sal_Int16>(50), 
GetColorSaturation(aColor2));
+    CPPUNIT_ASSERT_EQUAL(u"#000000"_ustr, aColor2);
     nIndex3 = getXPath(pXmlDoc, "(//textarray)[3]", "index").toInt32();
     nLength3 = getXPath(pXmlDoc, "(//textarray)[3]", "length").toInt32();
     CPPUNIT_ASSERT_EQUAL(u"newcontent"_ustr, aContent.copy(nIndex3, nLength3));
     aColor3 = getXPath(pXmlDoc, 
"(//textarray)[3]/preceding-sibling::textcolor[1]", "color");
     // Without the accompanying fix in place, this test would have failed with:
-    // - Expected less or equal than: 50
-    // - Actual  : 100
-    // i.e. the 3rd text portion was not de-saturated.
-    CPPUNIT_ASSERT_LESSEQUAL(static_cast<sal_Int16>(50), 
GetColorSaturation(aColor3));
+    // - Expected greater or equal than: 49
+    // - Actual  : 0
+    // i.e. the 3rd text portion had no increased lightness from black.
+    CPPUNIT_ASSERT_GREATEREQUAL(static_cast<sal_Int16>(49), 
GetColorLightness(aColor3));
 
     // Omit deletes: default, de-saturated, normal saturation.
     aOpt.SetRedlineRenderMode(SwRedlineRenderMode::OmitDeletes);
@@ -119,12 +128,12 @@ CPPUNIT_TEST_FIXTURE(Test, 
testRedlineRenderModeOmitInsertDelete)
     nLength2 = getXPath(pXmlDoc, "(//textarray)[2]", "length").toInt32();
     CPPUNIT_ASSERT_EQUAL(u"oldcontent"_ustr, aContent.copy(nIndex2, nLength2));
     aColor2 = getXPath(pXmlDoc, 
"(//textarray)[2]/preceding-sibling::textcolor[1]", "color");
-    CPPUNIT_ASSERT_LESSEQUAL(static_cast<sal_Int16>(50), 
GetColorSaturation(aColor2));
+    CPPUNIT_ASSERT_GREATEREQUAL(static_cast<sal_Int16>(49), 
GetColorLightness(aColor2));
     nIndex3 = getXPath(pXmlDoc, "(//textarray)[3]", "index").toInt32();
     nLength3 = getXPath(pXmlDoc, "(//textarray)[3]", "length").toInt32();
     CPPUNIT_ASSERT_EQUAL(u"newcontent"_ustr, aContent.copy(nIndex3, nLength3));
     aColor3 = getXPath(pXmlDoc, 
"(//textarray)[3]/preceding-sibling::textcolor[1]", "color");
-    CPPUNIT_ASSERT_GREATER(static_cast<sal_Int16>(50), 
GetColorSaturation(aColor3));
+    CPPUNIT_ASSERT_EQUAL(u"#000000"_ustr, aColor3);
 }
 }
 
diff --git a/sw/source/core/inc/drawfont.hxx b/sw/source/core/inc/drawfont.hxx
index 443f47635353..18c7913abf00 100644
--- a/sw/source/core/inc/drawfont.hxx
+++ b/sw/source/core/inc/drawfont.hxx
@@ -91,6 +91,7 @@ class SW_DLLPUBLIC SwDrawTextInfo
     // GetModelPositionForViewPoint should not return the next position if 
screen position is
     // inside second half of bound rect, used for Accessibility
     bool m_bPosMatchesBounds : 1 = false;
+    bool m_bOmitPaint = false;
 
 #ifdef DBG_UTIL
     // These flags should control that the appropriate Set-function has been
@@ -658,6 +659,9 @@ public:
     // as argument, the change if made to the font otherwise the font at the
     // output device is changed returns if the font has been changed
     bool ApplyAutoColor( vcl::Font* pFnt = nullptr );
+
+    void SetOmitPaint(bool bOmitPaint) { m_bOmitPaint = bOmitPaint; }
+    bool GetOmitPaint() const { return m_bOmitPaint; }
 };
 
 #endif
diff --git a/sw/source/core/text/inftxt.cxx b/sw/source/core/text/inftxt.cxx
index 8110a64b95e0..d63102bc4f07 100644
--- a/sw/source/core/text/inftxt.cxx
+++ b/sw/source/core/text/inftxt.cxx
@@ -725,6 +725,11 @@ void SwTextPaintInfo::DrawText_( const OUString &rText, 
const SwLinePortion &rPo
                              rPor.GetNextPortion()->InFixMargGrp() ||
                              rPor.GetNextPortion()->IsHolePortion() );
 
+    if (m_bOmitPaint)
+    {
+        aDrawInf.SetOmitPaint(m_bOmitPaint);
+    }
+
     // Draw text next to the left border
     Point aFontPos(m_aPos);
     if( m_pFnt->GetLeftBorder() && rPor.InTextGrp() && !static_cast<const 
SwTextPortion&>(rPor).GetJoinBorderWithPrev() )
diff --git a/sw/source/core/text/inftxt.hxx b/sw/source/core/text/inftxt.hxx
index d99d93dc248a..1ff88448610d 100644
--- a/sw/source/core/text/inftxt.hxx
+++ b/sw/source/core/text/inftxt.hxx
@@ -370,6 +370,7 @@ class SwTextPaintInfo : public SwTextSizeInfo
 
     sal_uInt16 m_nSpaceIdx;
     SwLineInfo const* m_pLineInfo{nullptr}; // hack: need this to get line 
props
+    bool m_bOmitPaint = false;
 
     void DrawText_(const OUString &rText, const SwLinePortion &rPor,
                    const TextFrameIndex nIdx, const TextFrameIndex nLen,
@@ -494,6 +495,7 @@ public:
     void SetSmartTags(sw::WrongListIterator *const pNew) { m_pSmartTags = 
pNew; }
     sw::WrongListIterator* GetSmartTags() const { return m_pSmartTags; }
     void SetLineInfo(SwLineInfo const*const pLineInfo) { m_pLineInfo = 
pLineInfo; }
+    void SetOmitPaint(bool bOmitPaint) { m_bOmitPaint = bOmitPaint; }
 };
 
 class SwTextFormatInfo : public SwTextPaintInfo
diff --git a/sw/source/core/text/itrpaint.cxx b/sw/source/core/text/itrpaint.cxx
index 14693858cda8..cfbbcd5b62b8 100644
--- a/sw/source/core/text/itrpaint.cxx
+++ b/sw/source/core/text/itrpaint.cxx
@@ -42,6 +42,8 @@
 #include "pormulti.hxx"
 #include <doc.hxx>
 #include <fmturl.hxx>
+#include <IDocumentRedlineAccess.hxx>
+#include <redline.hxx>
 
 // Returns, if we have an underline breaking situation
 // Adding some more conditions here means you also have to change them
@@ -305,6 +307,9 @@ void SwTextPainter::DrawTextLine( const SwRect &rPaint, 
SwSaveClip &rClip,
     // Reference portion for the paragraph end portion
     SwLinePortion* pEndTempl = m_pCurr->GetFirstPortion();
 
+    const SwDoc& rDoc = GetInfo().GetTextFrame()->GetDoc();
+    const IDocumentRedlineAccess& rIDRA = rDoc.getIDocumentRedlineAccess();
+    const SwRedlineTable& rRedlineTable = rIDRA.GetRedlineTable();
     while( pPor )
     {
         bool bSeeked = true;
@@ -422,6 +427,36 @@ void SwTextPainter::DrawTextLine( const SwRect &rPaint, 
SwSaveClip &rClip,
             roTaggedLabel.emplace(nullptr, nullptr, &aPorInfo, *pOut);
         }
 
+        // See if the redline render mode requires to omit the paint of the 
text portion.
+        SwRedlineTable::size_type nRedline = SwRedlineTable::npos;
+        SwRedlineRenderMode eRedlineRenderMode = SwRedlineRenderMode::Standard;
+        if (GetRedln() && GetRedln()->IsOn())
+        {
+            nRedline = GetRedln()->GetAct();
+            eRedlineRenderMode = GetInfo().GetOpt().GetRedlineRenderMode();
+        }
+        bool bOmitPaint = false;
+        if (nRedline != SwRedlineTable::npos)
+        {
+            const SwRangeRedline* pRedline = rRedlineTable[nRedline];
+            RedlineType eType = pRedline->GetType();
+            if (eRedlineRenderMode == SwRedlineRenderMode::OmitInserts
+                && eType == RedlineType::Insert)
+            {
+                bOmitPaint = true;
+            }
+            else if (eRedlineRenderMode == SwRedlineRenderMode::OmitDeletes
+                     && eType == RedlineType::Delete)
+            {
+                bOmitPaint = true;
+            }
+        }
+
+        if (bOmitPaint)
+        {
+            GetInfo().SetOmitPaint(true);
+        }
+
         {
             // #i16816# tagged pdf support
             Por_Info aPorInfo(*pPor, *this, 0);
@@ -444,6 +479,11 @@ void SwTextPainter::DrawTextLine( const SwRect &rPaint, 
SwSaveClip &rClip,
             }
         }
 
+        if (bOmitPaint)
+        {
+            GetInfo().SetOmitPaint(false);
+        }
+
         // lazy open LBody and paragraph tag after num portions have been 
painted to Lbl
         if (pPor->InNumberGrp() // also footnote label
             // note: numbering portion may be split if it has multiple scripts
diff --git a/sw/source/core/txtnode/fntcache.cxx 
b/sw/source/core/txtnode/fntcache.cxx
index 30114327effa..bc270a72d139 100644
--- a/sw/source/core/txtnode/fntcache.cxx
+++ b/sw/source/core/txtnode/fntcache.cxx
@@ -1048,6 +1048,25 @@ void SwFntObj::DrawText( SwDrawTextInfo &rInf )
 
     Color aOldColor( pTmpFont->GetColor() );
     bool bChgColor = rInf.ApplyAutoColor( pTmpFont );
+
+    if (rInf.GetOmitPaint())
+    {
+        Color aColor = pTmpFont->GetColor();
+        sal_uInt16 nHue;
+        sal_uInt16 nSaturation;
+        sal_uInt16 nBrightness;
+        aColor.RGBtoHSB(nHue, nSaturation, nBrightness);
+        // 50% lightness: balance between completely omitting the paint and 
hard-to-notice small
+        // difference.
+        nBrightness = 50;
+        aColor = Color::HSBtoRGB(nHue, nSaturation, nBrightness);
+        if (aColor != pTmpFont->GetColor())
+        {
+            bChgColor = true;
+            pTmpFont->SetColor(aColor);
+        }
+    }
+
     if( !pTmpFont->IsSameInstance( rInf.GetOut().GetFont() ) )
         rInf.GetOut().SetFont( *pTmpFont );
     if ( bChgColor )
diff --git a/sw/source/uibase/app/swmodul1.cxx 
b/sw/source/uibase/app/swmodul1.cxx
index 75d8909559b3..2b6391f8b142 100644
--- a/sw/source/uibase/app/swmodul1.cxx
+++ b/sw/source/uibase/app/swmodul1.cxx
@@ -484,23 +484,16 @@ std::size_t SwModule::InsertRedlineAuthor(const OUString& 
rAuthor)
 static void lcl_FillAuthorAttr( std::size_t nAuthor, SfxItemSet &rSet,
                         const AuthorCharAttr &rAttr, SwRedlineRenderMode 
eRenderMode = SwRedlineRenderMode::Standard )
 {
+    if (eRenderMode != SwRedlineRenderMode::Standard)
+    {
+        return;
+    }
+
     Color aCol( rAttr.m_nColor );
 
     if( rAttr.m_nColor == COL_TRANSPARENT )
     {
         aCol = lcl_GetAuthorColor(nAuthor);
-
-        // See if the redline render mode requires to de-saturize the color of 
the text portion.
-        if (eRenderMode != SwRedlineRenderMode::Standard)
-        {
-            sal_uInt16 nHue;
-            sal_uInt16 nSaturation;
-            sal_uInt16 nBrightness;
-            aCol.RGBtoHSB(nHue, nSaturation, nBrightness);
-            // 25% saturation: balance between complete gray and 
hard-to-notice small difference.
-            nSaturation = nSaturation / 4;
-            aCol = Color::HSBtoRGB(nHue, nSaturation, nBrightness);
-        }
     }
 
     bool bBackGr = rAttr.m_nColor == COL_NONE_COLOR;
@@ -556,22 +549,12 @@ static void lcl_FillAuthorAttr( std::size_t nAuthor, 
SfxItemSet &rSet,
 
 void SwModule::GetInsertAuthorAttr(std::size_t nAuthor, SfxItemSet &rSet, 
SwRedlineRenderMode eRenderMode)
 {
-    SwRedlineRenderMode eMode = SwRedlineRenderMode::Standard;
-    if (eRenderMode == SwRedlineRenderMode::OmitInserts)
-    {
-        eMode = eRenderMode;
-    }
-    lcl_FillAuthorAttr(nAuthor, rSet, m_pModuleConfig->GetInsertAuthorAttr(), 
eMode);
+    lcl_FillAuthorAttr(nAuthor, rSet, m_pModuleConfig->GetInsertAuthorAttr(), 
eRenderMode);
 }
 
 void SwModule::GetDeletedAuthorAttr(std::size_t nAuthor, SfxItemSet &rSet, 
SwRedlineRenderMode eRenderMode)
 {
-    SwRedlineRenderMode eMode = SwRedlineRenderMode::Standard;
-    if (eRenderMode == SwRedlineRenderMode::OmitDeletes)
-    {
-        eMode = eRenderMode;
-    }
-    lcl_FillAuthorAttr(nAuthor, rSet, m_pModuleConfig->GetDeletedAuthorAttr(), 
eMode);
+    lcl_FillAuthorAttr(nAuthor, rSet, m_pModuleConfig->GetDeletedAuthorAttr(), 
eRenderMode);
 }
 
 // For future extension:

Reply via email to