PegHighlighter: support fast parse

src/peghighlighterresult.cpp

@@ -7,6 +7,19 @@
 #include "pegmarkdownhighlighter.h"
 #include "utils/vutils.h"
 
+PegHighlighterFastResult::PegHighlighterFastResult()
+    : m_timeStamp(0)
+{
+}
+
+PegHighlighterFastResult::PegHighlighterFastResult(const PegMarkdownHighlighter *p_peg,
+                                                   const QSharedPointer<PegParseResult> &p_result)
+    : m_timeStamp(p_result->m_timeStamp)
+{
+    PegHighlighterResult::parseBlocksHighlights(m_blocksHighlights, p_peg, p_result);
+}
+
+
 PegHighlighterResult::PegHighlighterResult()
     : m_timeStamp(0),
       m_numOfBlocks(0),
@@ -25,7 +38,7 @@ PegHighlighterResult::PegHighlighterResult(const PegMarkdownHighlighter *p_peg,
     m_codeBlockStartExp = QRegExp(VUtils::c_fencedCodeBlockStartRegExp);
     m_codeBlockEndExp = QRegExp(VUtils::c_fencedCodeBlockEndRegExp);
 
-    parseBlocksHighlights(p_peg, p_result);
+    parseBlocksHighlights(m_blocksHighlights, p_peg, p_result);
 
     // Implicit sharing.
     m_imageRegions = p_result->m_imageRegions;
@@ -47,14 +60,16 @@ static bool compHLUnit(const HLUnit &p_a, const HLUnit &p_b)
     }
 }
 
-void PegHighlighterResult::parseBlocksHighlights(const PegMarkdownHighlighter *p_peg,
+void PegHighlighterResult::parseBlocksHighlights(QVector<QVector<HLUnit>> &p_blocksHighlights,
+                                                 const PegMarkdownHighlighter *p_peg,
                                                  const QSharedPointer<PegParseResult> &p_result)
 {
-    m_blocksHighlights.resize(m_numOfBlocks);
+    p_blocksHighlights.resize(p_result->m_numOfBlocks);
     if (p_result->isEmpty()) {
         return;
     }
 
+    int offset = p_result->m_offset;
     const QTextDocument *doc = p_peg->getDocument();
     const QVector<HighlightingStyle> &styles = p_peg->getStyles();
     auto pmhResult = p_result->m_pmhElements;
@@ -71,20 +86,25 @@ void PegHighlighterResult::parseBlocksHighlights(const PegMarkdownHighlighter *p
                 continue;
             }
 
-            parseBlocksHighlightOne(doc, elem_cursor->pos, elem_cursor->end, i);
+            parseBlocksHighlightOne(p_blocksHighlights,
+                                    doc,
+                                    offset + elem_cursor->pos,
+                                    offset + elem_cursor->end,
+                                    i);
             elem_cursor = elem_cursor->next;
         }
     }
 
-    // Sort m_blocksHighlights.
-    for (int i = 0; i < m_blocksHighlights.size(); ++i) {
-        if (m_blocksHighlights[i].size() > 1) {
-            std::sort(m_blocksHighlights[i].begin(), m_blocksHighlights[i].end(), compHLUnit);
+    // Sort p_blocksHighlights.
+    for (int i = 0; i < p_blocksHighlights.size(); ++i) {
+        if (p_blocksHighlights[i].size() > 1) {
+            std::sort(p_blocksHighlights[i].begin(), p_blocksHighlights[i].end(), compHLUnit);
         }
     }
 }
 
-void PegHighlighterResult::parseBlocksHighlightOne(const QTextDocument *p_doc,
+void PegHighlighterResult::parseBlocksHighlightOne(QVector<QVector<HLUnit>> &p_blocksHighlights,
+                                                   const QTextDocument *p_doc,
                                                    unsigned long p_pos,
                                                    unsigned long p_end,
                                                    int p_styleIndex)
@@ -121,7 +141,7 @@ void PegHighlighterResult::parseBlocksHighlightOne(const QTextDocument *p_doc,
         }
         unit.styleIndex = p_styleIndex;
 
-        m_blocksHighlights[blockNum].append(unit);
+        p_blocksHighlights[blockNum].append(unit);
 
         block = block.next();
     }

src/peghighlighterresult.h

@@ -7,16 +7,41 @@
 class PegMarkdownHighlighter;
 class QTextDocument;
 
+class PegHighlighterFastResult
+{
+public:
+    PegHighlighterFastResult();
+
+    PegHighlighterFastResult(const PegMarkdownHighlighter *p_peg,
+                             const QSharedPointer<PegParseResult> &p_result);
+
+    bool matched(TimeStamp p_timeStamp) const
+    {
+        return m_timeStamp == p_timeStamp;
+    }
+
+    TimeStamp m_timeStamp;
+
+    QVector<QVector<HLUnit>> m_blocksHighlights;
+};
+
+
 class PegHighlighterResult
 {
 public:
     PegHighlighterResult();
 
+    // TODO: handle p_result->m_offset.
     PegHighlighterResult(const PegMarkdownHighlighter *p_peg,
                          const QSharedPointer<PegParseResult> &p_result);
 
     bool matched(TimeStamp p_timeStamp) const;
 
+    // Parse highlight elements for all the blocks from parse results.
+    static void parseBlocksHighlights(QVector<QVector<HLUnit>> &p_blocksHighlights,
+                                      const PegMarkdownHighlighter *p_peg,
+                                      const QSharedPointer<PegParseResult> &p_result);
+
     TimeStamp m_timeStamp;
 
     int m_numOfBlocks;
@@ -48,15 +73,12 @@ public:
     QVector<VMathjaxBlock> m_mathjaxBlocks;
 
 private:
-    // Parse highlight elements for all the blocks from parse results.
-    void parseBlocksHighlights(const PegMarkdownHighlighter *p_peg,
-                               const QSharedPointer<PegParseResult> &p_result);
-
     // Parse highlight elements for blocks from one parse result.
-    void parseBlocksHighlightOne(const QTextDocument *p_doc,
-                                 unsigned long p_pos,
-                                 unsigned long p_end,
-                                 int p_styleIndex);
+    static void parseBlocksHighlightOne(QVector<QVector<HLUnit>> &p_blocksHighlights,
+                                        const QTextDocument *p_doc,
+                                        unsigned long p_pos,
+                                        unsigned long p_end,
+                                        int p_styleIndex);
 
     // Parse fenced code blocks from parse results.
     void parseFencedCodeBlocks(const PegMarkdownHighlighter *p_peg,

src/pegmarkdownhighlighter.cpp

@@ -49,6 +49,7 @@ void PegMarkdownHighlighter::init(const QVector<HighlightingStyle> &p_styles,
     m_colorColumnFormat.setBackground(QColor(g_config->getEditorColorColumnBg()));
 
     m_result.reset(new PegHighlighterResult());
+    m_fastResult.reset(new PegHighlighterFastResult());
 
     m_parser = new PegParser(this);
     connect(m_parser, &PegParser::parseResultReady,
@@ -62,6 +63,24 @@ void PegMarkdownHighlighter::init(const QVector<HighlightingStyle> &p_styles,
                 startParse();
             });
 
+    m_fastParseTimer = new QTimer(this);
+    m_fastParseTimer->setSingleShot(true);
+    m_fastParseTimer->setInterval(50);
+    connect(m_fastParseTimer, &QTimer::timeout,
+            this, [this]() {
+                QSharedPointer<PegHighlighterFastResult> result(m_fastResult);
+                if (!result->matched(m_timeStamp)) {
+                    return;
+                }
+
+                const QVector<QVector<HLUnit>> &hls = result->m_blocksHighlights;
+                for (int i = 0; i < hls.size(); ++i) {
+                    if (!hls[i].isEmpty()) {
+                        rehighlightBlock(m_doc->findBlockByNumber(i));
+                    }
+                }
+            });
+
     connect(m_doc, &QTextDocument::contentsChange,
             this, &PegMarkdownHighlighter::handleContentsChange);
 }
@@ -71,9 +90,31 @@ void PegMarkdownHighlighter::highlightBlock(const QString &p_text)
     QSharedPointer<PegHighlighterResult> result(m_result);
 
     int blockNum = currentBlock().blockNumber();
-    if (result->m_blocksHighlights.size() > blockNum) {
+
+    highlightBlockOne(result->m_blocksHighlights, blockNum);
+
+    highlightBlockOne(m_fastResult->m_blocksHighlights, blockNum);
+
+    // Set current block's user data.
+    updateBlockUserData(blockNum, p_text);
+
+    setCurrentBlockState(HighlightBlockState::Normal);
+
+    updateCodeBlockState(result, blockNum, p_text);
+
+    if (currentBlockState() == HighlightBlockState::CodeBlock) {
+        highlightCodeBlock(result, blockNum, p_text);
+
+        highlightCodeBlockColorColumn(p_text);
+    }
+}
+
+void PegMarkdownHighlighter::highlightBlockOne(const QVector<QVector<HLUnit>> &p_highlights,
+                                               int p_blockNum)
+{
+    if (p_highlights.size() > p_blockNum) {
         // units are sorted by start position and length.
-        const QVector<HLUnit> &units = result->m_blocksHighlights[blockNum];
+        const QVector<HLUnit> &units = p_highlights[p_blockNum];
         if (!units.isEmpty()) {
             for (int i = 0; i < units.size(); ++i) {
                 const HLUnit &unit = units[i];
@@ -102,19 +143,6 @@ void PegMarkdownHighlighter::highlightBlock(const QString &p_text)
             }
         }
     }
-
-    // Set current block's user data.
-    updateBlockUserData(blockNum, p_text);
-
-    setCurrentBlockState(HighlightBlockState::Normal);
-
-    updateCodeBlockState(result, blockNum, p_text);
-
-    if (currentBlockState() == HighlightBlockState::CodeBlock) {
-        highlightCodeBlock(result, blockNum, p_text);
-
-        highlightCodeBlockColorColumn(p_text);
-    }
 }
 
 void PegMarkdownHighlighter::handleContentsChange(int p_position, int p_charsRemoved, int p_charsAdded)
@@ -127,6 +155,8 @@ void PegMarkdownHighlighter::handleContentsChange(int p_position, int p_charsRem
 
     ++m_timeStamp;
 
+    startFastParse(p_position, p_charsRemoved, p_charsAdded);
+
     // We still need a timer to start a complete parse.
     m_timer->start();
 }
@@ -142,6 +172,47 @@ void PegMarkdownHighlighter::startParse()
     m_parser->parseAsync(config);
 }
 
+void PegMarkdownHighlighter::startFastParse(int p_position, int p_charsRemoved, int p_charsAdded)
+{
+    // Get affected block range.
+    int firstBlockNum, lastBlockNum;
+    getFastParseBlockRange(p_position, p_charsRemoved, p_charsAdded, firstBlockNum, lastBlockNum);
+
+    QString text;
+    QTextBlock block = m_doc->findBlockByNumber(firstBlockNum);
+    int offset = block.position();
+    while (block.isValid()) {
+        int blockNum = block.blockNumber();
+        if (blockNum > lastBlockNum) {
+            break;
+        } else if (blockNum == firstBlockNum) {
+            text = block.text();
+        } else {
+            text = text + "\n" + block.text();
+        }
+
+        block = block.next();
+    }
+
+    QSharedPointer<PegParseConfig> config(new PegParseConfig());
+    config->m_timeStamp = m_timeStamp;
+    config->m_data = text.toUtf8();
+    config->m_numOfBlocks = m_doc->blockCount();
+    config->m_offset = offset;
+    config->m_extensions = m_parserExts;
+    config->m_fast = true;
+
+    QSharedPointer<PegParseResult> parseRes = m_parser->parse(config);
+    processFastParseResult(parseRes);
+}
+
+void PegMarkdownHighlighter::processFastParseResult(const QSharedPointer<PegParseResult> &p_result)
+{
+    m_fastParseTimer->stop();
+    m_fastResult.reset(new PegHighlighterFastResult(this, p_result));
+    m_fastParseTimer->start();
+}
+
 static bool compHLUnitStyle(const HLUnitStyle &a, const HLUnitStyle &b)
 {
     if (a.start < b.start) {
@@ -424,3 +495,97 @@ void PegMarkdownHighlighter::completeHighlight(QSharedPointer<PegHighlighterResu
 
     emit highlightCompleted();
 }
+
+void PegMarkdownHighlighter::getFastParseBlockRange(int p_position,
+                                                    int p_charsRemoved,
+                                                    int p_charsAdded,
+                                                    int &p_firstBlock,
+                                                    int &p_lastBlock) const
+{
+    const int maxNumOfBlocks = 50;
+
+    int charsChanged = p_charsRemoved + p_charsAdded;
+    QTextBlock firstBlock = m_doc->findBlock(p_position);
+
+    // May be an invalid block.
+    QTextBlock lastBlock = m_doc->findBlock(qMax(0, p_position + charsChanged));
+    if (!lastBlock.isValid()) {
+        lastBlock = m_doc->lastBlock();
+    }
+
+    int num = lastBlock.blockNumber() - firstBlock.blockNumber() + 1;
+
+    if (num >= maxNumOfBlocks) {
+        p_firstBlock = firstBlock.blockNumber();
+        p_lastBlock = p_firstBlock + maxNumOfBlocks - 1;
+        return;
+    }
+
+    // Look up.
+    // Find empty block.
+    if (!VEditUtils::isEmptyBlock(firstBlock)) {
+        while (firstBlock.isValid() && num < maxNumOfBlocks) {
+            QTextBlock block = firstBlock.previous();
+            if (block.isValid() && !VEditUtils::isEmptyBlock(block)) {
+                firstBlock = block;
+                ++num;
+            } else {
+                break;
+            }
+        }
+    }
+
+    // Cross code block.
+    while (firstBlock.isValid() && num < maxNumOfBlocks) {
+        int state = firstBlock.userState();
+        if (state == HighlightBlockState::CodeBlock
+            || state == HighlightBlockState::CodeBlockEnd) {
+            QTextBlock block = firstBlock.previous();
+            if (block.isValid()) {
+                firstBlock = block;
+                ++num;
+            } else {
+                break;
+            }
+        } else {
+            break;
+        }
+    }
+
+    // Look down.
+    // Find empty block.
+    if (!VEditUtils::isEmptyBlock(lastBlock)) {
+        while (lastBlock.isValid() && num < maxNumOfBlocks) {
+            QTextBlock block = lastBlock.next();
+            if (block.isValid() && !VEditUtils::isEmptyBlock(block)) {
+                lastBlock = block;
+                ++num;
+            } else {
+                break;
+            }
+        }
+    }
+
+    // Cross code block.
+    while (lastBlock.isValid() && num < maxNumOfBlocks) {
+        int state = lastBlock.userState();
+        if (state == HighlightBlockState::CodeBlock
+            || state == HighlightBlockState::CodeBlockStart) {
+            QTextBlock block = lastBlock.next();
+            if (block.isValid()) {
+                lastBlock = block;
+                ++num;
+            } else {
+                break;
+            }
+        } else {
+            break;
+        }
+    }
+
+    p_firstBlock = firstBlock.blockNumber();
+    p_lastBlock = lastBlock.blockNumber();
+    if (p_lastBlock < p_firstBlock) {
+        p_lastBlock = p_firstBlock;
+    }
+}

src/pegmarkdownhighlighter.h

@@ -74,6 +74,8 @@ private slots:
 private:
     void startParse();
 
+    void startFastParse(int p_position, int p_charsRemoved, int p_charsAdded);
+
     void updateCodeBlocks(QSharedPointer<PegHighlighterResult> p_result);
 
     // Set the user data of currentBlock().
@@ -99,6 +101,17 @@ private:
 
     bool isMathJaxEnabled() const;
 
+    void getFastParseBlockRange(int p_position,
+                                int p_charsRemoved,
+                                int p_charsAdded,
+                                int &p_firstBlock,
+                                int &p_lastBlock) const;
+
+    void processFastParseResult(const QSharedPointer<PegParseResult> &p_result);
+
+    void highlightBlockOne(const QVector<QVector<HLUnit>> &p_highlights,
+                           int p_blockNum);
+
     QTextDocument *m_doc;
 
     TimeStamp m_timeStamp;
@@ -113,6 +126,8 @@ private:
 
     QSharedPointer<PegHighlighterResult> m_result;
 
+    QSharedPointer<PegHighlighterFastResult> m_fastResult;
+
     // Block number of those blocks which possible contains previewed image.
     QSet<int> m_possiblePreviewBlocks;
 
@@ -121,6 +136,8 @@ private:
 
     // Timer to trigger parse.
     QTimer *m_timer;
+
+    QTimer *m_fastParseTimer;
 };
 
 inline const QVector<VElementRegion> &PegMarkdownHighlighter::getHeaderRegions() const

src/pegparser.cpp

@@ -8,8 +8,12 @@ enum WorkerState
     Finished
 };
 
-void PegParseResult::parse(QAtomicInt &p_stop)
+void PegParseResult::parse(QAtomicInt &p_stop, bool p_fast)
 {
+    if (p_fast) {
+        return;
+    }
+
     parseImageRegions(p_stop);
 
     parseHeaderRegions(p_stop);
@@ -40,7 +44,7 @@ void PegParseResult::parseImageRegions(QAtomicInt &p_stop)
             return;
         }
 
-        m_imageRegions.push_back(VElementRegion(elem->pos, elem->end));
+        m_imageRegions.push_back(VElementRegion(m_offset + elem->pos, m_offset + elem->end));
         elem = elem->next;
     }
 }
@@ -66,7 +70,7 @@ void PegParseResult::parseHeaderRegions(QAtomicInt &p_stop)
                 return;
             }
 
-            m_headerRegions.push_back(VElementRegion(elem->pos, elem->end));
+            m_headerRegions.push_back(VElementRegion(m_offset + elem->pos, m_offset + elem->end));
             elem = elem->next;
         }
     }
@@ -96,8 +100,9 @@ void PegParseResult::parseFencedCodeBlockRegions(QAtomicInt &p_stop)
             return;
         }
 
-        if (!m_codeBlockRegions.contains(elem->pos)) {
-            m_codeBlockRegions.insert(elem->pos, VElementRegion(elem->pos, elem->end));
+        if (!m_codeBlockRegions.contains(m_offset + elem->pos)) {
+            m_codeBlockRegions.insert(m_offset + elem->pos,
+                                      VElementRegion(m_offset + elem->pos, m_offset + elem->end));
         }
 
         elem = elem->next;
@@ -122,7 +127,7 @@ void PegParseResult::parseInlineEquationRegions(QAtomicInt &p_stop)
             return;
         }
 
-        m_inlineEquationRegions.push_back(VElementRegion(elem->pos, elem->end));
+        m_inlineEquationRegions.push_back(VElementRegion(m_offset + elem->pos, m_offset + elem->end));
         elem = elem->next;
     }
 }
@@ -145,7 +150,7 @@ void PegParseResult::parseDisplayFormulaRegions(QAtomicInt &p_stop)
             return;
         }
 
-        m_displayFormulaRegions.push_back(VElementRegion(elem->pos, elem->end));
+        m_displayFormulaRegions.push_back(VElementRegion(m_offset + elem->pos, m_offset + elem->end));
         elem = elem->next;
     }
 
@@ -214,7 +219,7 @@ QSharedPointer<PegParseResult> PegParserWorker::parseMarkdown(const QSharedPoint
         return result;
     }
 
-    result->parse(p_stop);
+    result->parse(p_stop, p_config->m_fast);
 
     return result;
 }
@@ -228,13 +233,6 @@ PegParser::PegParser(QObject *p_parent)
     init();
 }
 
-void PegParser::parseAsync(const QSharedPointer<PegParseConfig> &p_config)
-{
-    m_pendingWork = p_config;
-
-    pickWorker();
-}
-
 void PegParser::init()
 {
     for (int i = 0; i < NUM_OF_THREADS; ++i) {
@@ -267,6 +265,29 @@ PegParser::~PegParser()
     clear();
 }
 
+void PegParser::parseAsync(const QSharedPointer<PegParseConfig> &p_config)
+{
+    m_pendingWork = p_config;
+
+    pickWorker();
+}
+
+QSharedPointer<PegParseResult> PegParser::parse(const QSharedPointer<PegParseConfig> &p_config)
+{
+    QSharedPointer<PegParseResult> result(new PegParseResult(p_config));
+
+    if (p_config->m_data.isEmpty()) {
+        return result;
+    }
+
+    result->m_pmhElements = PegParser::parseMarkdownToElements(p_config);
+
+    QAtomicInt stop(0);
+    result->parse(stop, p_config->m_fast);
+
+    return result;
+}
+
 void PegParser::handleWorkerFinished(PegParserWorker *p_worker)
 {
     QSharedPointer<PegParseResult> result;
@@ -333,6 +354,7 @@ QVector<VElementRegion> PegParser::parseImageRegions(const QSharedPointer<PegPar
         return regs;
     }
 
+    int offset = p_config->m_offset;
     pmh_element *elem = res[pmh_IMAGE];
     while (elem != NULL) {
         if (elem->end <= elem->pos) {
@@ -340,7 +362,7 @@ QVector<VElementRegion> PegParser::parseImageRegions(const QSharedPointer<PegPar
             continue;
         }
 
-        regs.push_back(VElementRegion(elem->pos, elem->end));
+        regs.push_back(VElementRegion(offset + elem->pos, offset + elem->end));
         elem = elem->next;
     }
 

src/pegparser.h

@@ -16,7 +16,9 @@ struct PegParseConfig
     PegParseConfig()
         : m_timeStamp(0),
           m_numOfBlocks(0),
-          m_extensions(pmh_EXT_NONE)
+          m_offset(0),
+          m_extensions(pmh_EXT_NONE),
+          m_fast(false)
     {
     }
 
@@ -26,8 +28,14 @@ struct PegParseConfig
 
     int m_numOfBlocks;
 
+    // Offset of m_data in the document.
+    int m_offset;
+
     int m_extensions;
 
+    // Fast parse.
+    bool m_fast;
+
     QString toString() const
     {
         return QString("PegParseConfig ts %1 data %2 blocks %3").arg(m_timeStamp)
@@ -41,6 +49,7 @@ struct PegParseResult
     PegParseResult(const QSharedPointer<PegParseConfig> &p_config)
         : m_timeStamp(p_config->m_timeStamp),
           m_numOfBlocks(p_config->m_numOfBlocks),
+          m_offset(p_config->m_offset),
           m_pmhElements(NULL)
     {
     }
@@ -74,12 +83,14 @@ struct PegParseResult
     }
 
     // Parse m_pmhElements.
-    void parse(QAtomicInt &p_stop);
+    void parse(QAtomicInt &p_stop, bool p_fast);
 
     TimeStamp m_timeStamp;
 
     int m_numOfBlocks;
 
+    int m_offset;
+
     pmh_element **m_pmhElements;
 
     // All image link regions.
@@ -178,6 +189,8 @@ public:
 
     ~PegParser();
 
+    QSharedPointer<PegParseResult> parse(const QSharedPointer<PegParseConfig> &p_config);
+
     void parseAsync(const QSharedPointer<PegParseConfig> &p_config);
 
     static QVector<VElementRegion> parseImageRegions(const QSharedPointer<PegParseConfig> &p_config);

src/vcodeblockhighlighthelper.cpp

@@ -290,10 +290,10 @@ void VCodeBlockHighlightHelper::addToHighlightCache(const QString &p_text,
                                                     const QVector<HLUnitPos> &p_units)
 {
     const int c_maxEntries = 100;
-    const int c_maxTimeStampSpan = 3;
+    const TimeStamp c_maxTimeStampSpan = 3;
     if (m_cache.size() >= c_maxEntries) {
         // Remove the oldest one.
-        int ts = p_timeStamp - c_maxTimeStampSpan;
+        TimeStamp ts = p_timeStamp - c_maxTimeStampSpan;
         for (auto it = m_cache.begin(); it != m_cache.end();) {
             if (it.value().m_timeStamp < ts) {
                 it = m_cache.erase(it);

src/vpreviewmanager.cpp

@@ -1,7 +1,6 @@
 #include "vpreviewmanager.h"
 
 #include <QTextDocument>
-#include <QDebug>
 #include <QDir>
 #include <QUrl>
 #include <QVector>
@@ -63,7 +62,6 @@ void VPreviewManager::imageDownloaded(const QByteArray &p_data, const QString &p
 
     if (!image.isNull()) {
         m_editor->addImage(name, image);
-        qDebug() << "downloaded image inserted in resource manager" << p_url << name;
         emit requestUpdateImageLinks();
     }
 }
@@ -172,8 +170,6 @@ void VPreviewManager::fetchImageLinksFromRegions(QVector<VElementRegion> p_image
         }
 
         p_imageLinks.append(info);
-
-        qDebug() << "image region" << i << info.toString();
     }
 }
 
@@ -404,10 +400,6 @@ void VPreviewManager::updateBlockPreviewInfo(TS p_timeStamp,
             affectedBlocks.insert(link.m_blockNumber, QMapDummyValue());
             m_highlighter->addPossiblePreviewBlock(link.m_blockNumber);
         }
-
-        qDebug() << "block" << link.m_blockNumber
-                 << imageCache(PreviewSource::ImageLink).size()
-                 << blockData->toString();
     }
 
     relayoutEditor(affectedBlocks);