/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of Qt Creator.
**
** Commercial License Usage
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** accordance with the commercial license agreement provided with the
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** use the contact form at http://qt.digia.com/contact-us.
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** GNU Lesser General Public License Usage
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** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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****************************************************************************/
#include "diffeditorwidget.h"
#include <QPlainTextEdit>
#include <QSplitter>
#include <QVBoxLayout>
#include <QPlainTextDocumentLayout>
#include <QTextBlock>
#include <QScrollBar>
#include <QPainter>
#include <QDir>
#include <QToolButton>
#include <texteditor/basetexteditor.h>
#include <texteditor/snippets/snippeteditor.h>
#include <texteditor/basetextdocumentlayout.h>
#include <texteditor/syntaxhighlighter.h>
#include <texteditor/basetextdocument.h>
#include <texteditor/texteditorsettings.h>
static const int BASE_LEVEL = 0;
static const int FILE_LEVEL = 1;
static const int CHUNK_LEVEL = 2;
using namespace TextEditor;
namespace DiffEditor {
struct TextLineData {
enum TextLineType {
TextLine,
Separator,
Invalid
};
TextLineData() : textLineType(Invalid) {}
TextLineData(const QString &txt) : textLineType(TextLine), text(txt) {}
TextLineData(TextLineType t) : textLineType(t) {}
TextLineType textLineType;
QString text;
};
struct RowData {
RowData() : equal(true) {}
RowData(const TextLineData &l)
: leftLine(l), rightLine(l), equal(true) {}
RowData(const TextLineData &l, const TextLineData &r, bool e = false)
: leftLine(l), rightLine(r), equal(e) {}
TextLineData leftLine;
TextLineData rightLine;
bool equal; // true if left and right lines are equal, taking whitespaces into account (or both invalid)
};
struct ChunkData {
ChunkData() : contextChunk(false) {}
QList<RowData> rows;
bool contextChunk;
QMap<int, int> changedLeftPositions; // counting from the beginning of the chunk
QMap<int, int> changedRightPositions; // counting from the beginning of the chunk
};
struct FileData {
FileData() {}
FileData(const ChunkData &chunkData) { chunks.append(chunkData); }
QList<ChunkData> chunks;
DiffEditorWidget::DiffFileInfo leftFileInfo;
DiffEditorWidget::DiffFileInfo rightFileInfo;
};
//////////////////////
class DiffViewEditorEditable : public BaseTextEditor
{
Q_OBJECT
public:
DiffViewEditorEditable(BaseTextEditorWidget *editorWidget) : BaseTextEditor(editorWidget) {}
virtual Core::Id id() const { return "DiffViewEditor"; }
virtual bool duplicateSupported() const { return false; }
virtual IEditor *duplicate(QWidget *parent) { Q_UNUSED(parent) return 0; }
virtual bool isTemporary() const { return false; }
};
////////////////////////
class DiffViewEditorWidget : public SnippetEditorWidget
{
Q_OBJECT
public:
DiffViewEditorWidget(QWidget *parent = 0);
void setSyntaxHighlighter(SyntaxHighlighter *sh) {
baseTextDocument()->setSyntaxHighlighter(sh);
}
QTextCodec *codec() const {
return const_cast<QTextCodec *>(baseTextDocument()->codec());
}
QMap<int, int> skippedLines() const { return m_skippedLines; }
void setWorkingDirectory(const QString &workingDirectory) { m_workingDirectory = workingDirectory; }
void setLineNumber(int blockNumber, int lineNumber);
void setFileInfo(int blockNumber, const DiffEditorWidget::DiffFileInfo &fileInfo) { m_fileInfo[blockNumber] = fileInfo; setSeparator(blockNumber, true); }
void setSkippedLines(int blockNumber, int skippedLines) { m_skippedLines[blockNumber] = skippedLines; setSeparator(blockNumber, true); }
void setSeparator(int blockNumber, bool separator) { m_separators[blockNumber] = separator; }
bool isFileLine(int blockNumber) const { return m_fileInfo.contains(blockNumber); }
int blockNumberForFileIndex(int fileIndex) const;
int fileIndexForBlockNumber(int blockNumber) const;
bool isChunkLine(int blockNumber) const { return m_skippedLines.contains(blockNumber); }
void clearAll();
void clearAll(const QString &message);
void clearAllData();
QTextBlock firstVisibleBlock() const { return SnippetEditorWidget::firstVisibleBlock(); }
protected:
virtual int extraAreaWidth(int *markWidthPtr = 0) const { return BaseTextEditorWidget::extraAreaWidth(markWidthPtr); }
BaseTextEditor *createEditor() { return new DiffViewEditorEditable(this); }
virtual QString lineNumber(int blockNumber) const;
virtual int lineNumberDigits() const;
virtual bool selectionVisible(int blockNumber) const;
virtual bool replacementVisible(int blockNumber) const;
virtual QString plainTextFromSelection(const QTextCursor &cursor) const;
virtual void drawCollapsedBlockPopup(QPainter &painter,
const QTextBlock &block,
QPointF offset,
const QRect &clip);
void mouseDoubleClickEvent(QMouseEvent *e);
virtual void paintEvent(QPaintEvent *e);
virtual void scrollContentsBy(int dx, int dy);
private:
void paintCollapsedBlockPopup(QPainter &painter, const QRect &clipRect);
void paintSeparator(QPainter &painter, const QString &text, const QTextBlock &block, int top);
void jumpToOriginalFile(const QTextCursor &cursor);
QString m_workingDirectory;
QMap<int, int> m_lineNumbers;
int m_lineNumberDigits;
// block number, fileInfo
QMap<int, DiffEditorWidget::DiffFileInfo> m_fileInfo;
// block number, skipped lines
QMap<int, int> m_skippedLines;
// block number, separator. Separator used as lines alignment and inside skipped lines
QMap<int, bool> m_separators;
bool m_inPaintEvent;
};
DiffViewEditorWidget::DiffViewEditorWidget(QWidget *parent)
: SnippetEditorWidget(parent), m_lineNumberDigits(1), m_inPaintEvent(false)
{
setLineNumbersVisible(true);
setCodeFoldingSupported(true);
setFrameStyle(QFrame::NoFrame);
}
QString DiffViewEditorWidget::lineNumber(int blockNumber) const
{
if (m_lineNumbers.contains(blockNumber))
return QString::number(m_lineNumbers.value(blockNumber));
return QString();
}
int DiffViewEditorWidget::lineNumberDigits() const
{
return m_lineNumberDigits;
}
bool DiffViewEditorWidget::selectionVisible(int blockNumber) const
{
return !m_separators.value(blockNumber, false);
}
bool DiffViewEditorWidget::replacementVisible(int blockNumber) const
{
return isChunkLine(blockNumber) || (isFileLine(blockNumber)
&& TextEditor::BaseTextDocumentLayout::isFolded(document()->findBlockByNumber(blockNumber)));
}
QString DiffViewEditorWidget::plainTextFromSelection(const QTextCursor &cursor) const
{
const int startPosition = cursor.selectionStart();
const int endPosition = cursor.selectionEnd();
if (startPosition == endPosition)
return QString(); // no selection
QTextBlock startBlock = document()->findBlock(startPosition);
QTextBlock endBlock = document()->findBlock(endPosition);
QTextBlock block = startBlock;
QString text;
bool textInserted = false;
while (block.isValid() && block.blockNumber() <= endBlock.blockNumber()) {
if (selectionVisible(block.blockNumber())) {
if (block == startBlock) {
if (block == endBlock)
text = cursor.selectedText(); // just one line text
else
text = block.text().mid(startPosition - block.position());
} else {
if (textInserted)
text += QLatin1Char('\n');
if (block == endBlock)
text += block.text().left(endPosition - block.position());
else
text += block.text();
}
textInserted = true;
}
block = block.next();
}
return convertToPlainText(text);
}
void DiffViewEditorWidget::setLineNumber(int blockNumber, int lineNumber)
{
const QString lineNumberString = QString::number(lineNumber);
m_lineNumbers.insert(blockNumber, lineNumber);
m_lineNumberDigits = qMax(m_lineNumberDigits, lineNumberString.count());
}
int DiffViewEditorWidget::blockNumberForFileIndex(int fileIndex) const
{
if (fileIndex < 0 || fileIndex >= m_fileInfo.count())
return -1;
QMap<int, DiffEditorWidget::DiffFileInfo>::const_iterator it
= m_fileInfo.constBegin();
for (int i = 0; i < fileIndex; i++)
++it;
return it.key();
}
int DiffViewEditorWidget::fileIndexForBlockNumber(int blockNumber) const
{
QMap<int, DiffEditorWidget::DiffFileInfo>::const_iterator it
= m_fileInfo.constBegin();
QMap<int, DiffEditorWidget::DiffFileInfo>::const_iterator itEnd
= m_fileInfo.constEnd();
int i = -1;
while (it != itEnd) {
if (it.key() > blockNumber)
break;
++it;
++i;
}
return i;
}
void DiffViewEditorWidget::clearAll()
{
clearAll(tr("No difference"));
}
void DiffViewEditorWidget::clearAll(const QString &message)
{
setBlockSelection(false);
clear();
clearAllData();
setPlainText(message);
}
void DiffViewEditorWidget::clearAllData()
{
m_lineNumberDigits = 1;
m_lineNumbers.clear();
m_fileInfo.clear();
m_skippedLines.clear();
m_separators.clear();
}
void DiffViewEditorWidget::scrollContentsBy(int dx, int dy)
{
SnippetEditorWidget::scrollContentsBy(dx, dy);
// TODO: update only chunk lines
viewport()->update();
}
void DiffViewEditorWidget::paintSeparator(QPainter &painter, const QString &text, const QTextBlock &block, int top)
{
QPointF offset = contentOffset();
painter.save();
painter.setPen(palette().foreground().color());
const QString replacementText = QLatin1String(" {")
+ foldReplacementText(block)
+ QLatin1String("}; ");
const int replacementTextWidth = fontMetrics().width(replacementText) + 24;
int x = replacementTextWidth + offset.x();
if (x < document()->documentMargin() || !TextEditor::BaseTextDocumentLayout::isFolded(block))
x = document()->documentMargin();
const QString elidedText = fontMetrics().elidedText(text,
Qt::ElideRight,
viewport()->width() - x);
QTextLayout *layout = block.layout();
QTextLine textLine = layout->lineAt(0);
QRectF lineRect = textLine.naturalTextRect().translated(offset.x(), top);
QRect clipRect = contentsRect();
clipRect.setLeft(x);
painter.setClipRect(clipRect);
painter.drawText(QPointF(x, lineRect.top() + textLine.ascent()),
elidedText);
painter.restore();
}
void DiffViewEditorWidget::mouseDoubleClickEvent(QMouseEvent *e)
{
if (e->button() == Qt::LeftButton && !(e->modifiers() & Qt::ShiftModifier)) {
QTextCursor cursor = cursorForPosition(e->pos());
jumpToOriginalFile(cursor);
}
SnippetEditorWidget::mouseDoubleClickEvent(e);
}
void DiffViewEditorWidget::jumpToOriginalFile(const QTextCursor &cursor)
{
if (m_fileInfo.isEmpty())
return;
const int blockNumber = cursor.blockNumber();
const int position = cursor.positionInBlock();
if (!m_lineNumbers.contains(blockNumber))
return;
const int lineNr = m_lineNumbers.value(blockNumber);
QMap<int, DiffEditorWidget::DiffFileInfo>::const_iterator it = m_fileInfo.upperBound(blockNumber);
if (it != m_fileInfo.constBegin())
--it;
const QDir dir(m_workingDirectory);
const QString fileName = dir.absoluteFilePath(it.value().fileName);
Core::IEditor *ed = Core::EditorManager::openEditor(fileName, Core::Id(), Core::EditorManager::ModeSwitch);
if (TextEditor::ITextEditor *editor = qobject_cast<TextEditor::ITextEditor *>(ed))
editor->gotoLine(lineNr, position);
}
void DiffViewEditorWidget::paintEvent(QPaintEvent *e)
{
m_inPaintEvent = true;
SnippetEditorWidget::paintEvent(e);
m_inPaintEvent = false;
QPainter painter(viewport());
QPointF offset = contentOffset();
QTextBlock firstBlock = firstVisibleBlock();
QTextBlock currentBlock = firstBlock;
while (currentBlock.isValid()) {
if (currentBlock.isVisible()) {
qreal top = blockBoundingGeometry(currentBlock).translated(offset).top();
qreal bottom = top + blockBoundingRect(currentBlock).height();
if (top > e->rect().bottom())
break;
if (bottom >= e->rect().top()) {
const int blockNumber = currentBlock.blockNumber();
const int skippedBefore = m_skippedLines.value(blockNumber);
if (skippedBefore) {
const QString skippedRowsText = tr("Skipped %n lines...", 0, skippedBefore);
paintSeparator(painter, skippedRowsText, currentBlock, top);
}
const DiffEditorWidget::DiffFileInfo fileInfo = m_fileInfo.value(blockNumber);
if (!fileInfo.fileName.isEmpty()) {
const QString fileNameText = fileInfo.typeInfo.isEmpty()
? fileInfo.fileName
: tr("[%1] %2").arg(fileInfo.typeInfo).arg(fileInfo.fileName);
paintSeparator(painter, fileNameText, currentBlock, top);
}
}
}
currentBlock = currentBlock.next();
}
paintCollapsedBlockPopup(painter, e->rect());
}
void DiffViewEditorWidget::paintCollapsedBlockPopup(QPainter &painter, const QRect &clipRect)
{
QPointF offset(contentOffset());
QRect viewportRect = viewport()->rect();
QTextBlock block = firstVisibleBlock();
QTextBlock visibleCollapsedBlock;
QPointF visibleCollapsedBlockOffset;
while (block.isValid()) {
QRectF r = blockBoundingRect(block).translated(offset);
offset.ry() += r.height();
if (offset.y() > viewportRect.height())
break;
block = block.next();
if (!block.isVisible()) {
if (block.blockNumber() == visibleFoldedBlockNumber()) {
visibleCollapsedBlock = block;
visibleCollapsedBlockOffset = offset + QPointF(0,1);
break;
}
// invisible blocks do have zero line count
block = document()->findBlockByLineNumber(block.firstLineNumber());
}
}
if (visibleCollapsedBlock.isValid()) {
drawCollapsedBlockPopup(painter,
visibleCollapsedBlock,
visibleCollapsedBlockOffset,
clipRect);
}
}
void DiffViewEditorWidget::drawCollapsedBlockPopup(QPainter &painter,
const QTextBlock &block,
QPointF offset,
const QRect &clip)
{
// We ignore the call coming from the BaseTextEditorWidget::paintEvent()
// since we will draw it later, after custom drawings of this paintEvent.
// We need to draw it after our custom drawings, otherwise custom
// drawings will appear in front of block popup.
if (m_inPaintEvent)
return;
int margin = block.document()->documentMargin();
qreal maxWidth = 0;
qreal blockHeight = 0;
QTextBlock b = block;
while (!b.isVisible()) {
if (!m_separators.contains(b.blockNumber())) {
b.setVisible(true); // make sure block bounding rect works
QRectF r = blockBoundingRect(b).translated(offset);
QTextLayout *layout = b.layout();
for (int i = layout->lineCount()-1; i >= 0; --i)
maxWidth = qMax(maxWidth, layout->lineAt(i).naturalTextWidth() + 2*margin);
blockHeight += r.height();
b.setVisible(false); // restore previous state
b.setLineCount(0); // restore 0 line count for invisible block
}
b = b.next();
}
painter.save();
painter.setRenderHint(QPainter::Antialiasing, true);
painter.translate(.5, .5);
QBrush brush = palette().base();
painter.setBrush(brush);
painter.drawRoundedRect(QRectF(offset.x(),
offset.y(),
maxWidth, blockHeight).adjusted(0, 0, 0, 0), 3, 3);
painter.restore();
QTextBlock end = b;
b = block;
while (b != end) {
if (!m_separators.contains(b.blockNumber())) {
b.setVisible(true); // make sure block bounding rect works
QRectF r = blockBoundingRect(b).translated(offset);
QTextLayout *layout = b.layout();
QVector<QTextLayout::FormatRange> selections;
layout->draw(&painter, offset, selections, clip);
b.setVisible(false); // restore previous state
b.setLineCount(0); // restore 0 line count for invisible block
offset.ry() += r.height();
}
b = b.next();
}
}
//////////////////
DiffEditorWidget::DiffEditorWidget(QWidget *parent)
: QWidget(parent),
m_contextLinesNumber(3),
m_ignoreWhitespaces(true),
m_syncScrollBars(true),
m_foldingBlocker(false)
{
TextEditor::TextEditorSettings *settings = TextEditorSettings::instance();
QToolButton *toggleSync = new QToolButton();
toggleSync = new QToolButton;
toggleSync->setText(QLatin1String("S"));
toggleSync->setCheckable(true);
toggleSync->setChecked(m_syncScrollBars);
toggleSync->setToolTip(tr("Synchronize Horizontal Scroll Bars"));
toggleSync->setAutoRaise(true);
connect(toggleSync, SIGNAL(clicked(bool)), this, SLOT(toggleScrollBarSynchronization(bool)));
m_leftEditor = new DiffViewEditorWidget(this);
m_leftEditor->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
m_leftEditor->setReadOnly(true);
m_leftEditor->setHighlightCurrentLine(false);
m_leftEditor->setWordWrapMode(QTextOption::NoWrap);
connect(settings, SIGNAL(fontSettingsChanged(TextEditor::FontSettings)),
m_leftEditor, SLOT(setFontSettings(TextEditor::FontSettings)));
m_leftEditor->setFontSettings(settings->fontSettings());
m_leftEditor->setCodeStyle(settings->codeStyle());
m_rightEditor = new DiffViewEditorWidget(this);
m_rightEditor->setCornerWidget(toggleSync);
m_rightEditor->setReadOnly(true);
m_rightEditor->setHighlightCurrentLine(false);
m_rightEditor->setWordWrapMode(QTextOption::NoWrap);
connect(settings, SIGNAL(fontSettingsChanged(TextEditor::FontSettings)),
m_rightEditor, SLOT(setFontSettings(TextEditor::FontSettings)));
m_rightEditor->setFontSettings(settings->fontSettings());
m_rightEditor->setCodeStyle(settings->codeStyle());
connect(m_leftEditor->verticalScrollBar(), SIGNAL(valueChanged(int)),
this, SLOT(leftVSliderChanged()));
connect(m_leftEditor->verticalScrollBar(), SIGNAL(actionTriggered(int)),
this, SLOT(leftVSliderChanged()));
connect(m_leftEditor->horizontalScrollBar(), SIGNAL(valueChanged(int)),
this, SLOT(leftHSliderChanged()));
connect(m_leftEditor->horizontalScrollBar(), SIGNAL(actionTriggered(int)),
this, SLOT(leftHSliderChanged()));
connect(m_leftEditor, SIGNAL(cursorPositionChanged()),
this, SLOT(leftCursorPositionChanged()));
connect(m_leftEditor->document()->documentLayout(), SIGNAL(documentSizeChanged(QSizeF)),
this, SLOT(leftDocumentSizeChanged()));
connect(m_rightEditor->verticalScrollBar(), SIGNAL(valueChanged(int)),
this, SLOT(rightVSliderChanged()));
connect(m_rightEditor->verticalScrollBar(), SIGNAL(actionTriggered(int)),
this, SLOT(rightVSliderChanged()));
connect(m_rightEditor->horizontalScrollBar(), SIGNAL(valueChanged(int)),
this, SLOT(rightHSliderChanged()));
connect(m_rightEditor->horizontalScrollBar(), SIGNAL(actionTriggered(int)),
this, SLOT(rightHSliderChanged()));
connect(m_rightEditor, SIGNAL(cursorPositionChanged()),
this, SLOT(rightCursorPositionChanged()));
connect(m_rightEditor->document()->documentLayout(), SIGNAL(documentSizeChanged(QSizeF)),
this, SLOT(rightDocumentSizeChanged()));
m_splitter = new QSplitter(this);
m_splitter->addWidget(m_leftEditor);
m_splitter->addWidget(m_rightEditor);
QVBoxLayout *l = new QVBoxLayout(this);
l->setMargin(0);
l->addWidget(m_splitter);
clear();
}
DiffEditorWidget::~DiffEditorWidget()
{
}
void DiffEditorWidget::clear()
{
m_leftEditor->clearAll();
m_rightEditor->clearAll();
}
void DiffEditorWidget::clear(const QString &message)
{
m_leftEditor->clearAll(message);
m_rightEditor->clearAll(message);
}
void DiffEditorWidget::setDiff(const QList<DiffFilesContents> &diffFileList, const QString &workingDirectory)
{
m_leftEditor->setWorkingDirectory(workingDirectory);
m_rightEditor->setWorkingDirectory(workingDirectory);
Differ differ;
QList<DiffList> diffList;
for (int i = 0; i < diffFileList.count(); i++) {
DiffFilesContents dfc = diffFileList.at(i);
DiffList dl;
dl.leftFileInfo = dfc.leftFileInfo;
dl.rightFileInfo = dfc.rightFileInfo;
dl.diffList = differ.cleanupSemantics(differ.diff(dfc.leftText, dfc.rightText));
diffList.append(dl);
}
setDiff(diffList);
}
void DiffEditorWidget::setDiff(const QList<DiffList> &diffList)
{
m_diffList = diffList;
m_originalChunkData.clear();
m_contextFileData.clear();
for (int i = 0; i < m_diffList.count(); i++) {
const DiffList &dl = m_diffList.at(i);
ChunkData chunkData = calculateOriginalData(dl.diffList);
m_originalChunkData.append(chunkData);
FileData fileData = calculateContextData(chunkData);
fileData.leftFileInfo = dl.leftFileInfo;
fileData.rightFileInfo = dl.rightFileInfo;
m_contextFileData.append(fileData);
}
showDiff();
}
void DiffEditorWidget::setContextLinesNumber(int lines)
{
if (m_contextLinesNumber == lines)
return;
m_contextLinesNumber = lines;
for (int i = 0; i < m_diffList.count(); i++) {
const FileData oldFileData = m_contextFileData.at(i);
FileData newFileData = calculateContextData(m_originalChunkData.at(i));
newFileData.leftFileInfo = oldFileData.leftFileInfo;
newFileData.rightFileInfo = oldFileData.rightFileInfo;
m_contextFileData[i] = newFileData;
}
showDiff();
}
void DiffEditorWidget::setIgnoreWhitespaces(bool ignore)
{
if (m_ignoreWhitespaces == ignore)
return;
m_ignoreWhitespaces = ignore;
setDiff(m_diffList);
}
void DiffEditorWidget::navigateToDiffFile(int diffFileIndex)
{
const int blockNumber = m_leftEditor->blockNumberForFileIndex(diffFileIndex);
QTextBlock leftBlock = m_leftEditor->document()->findBlockByNumber(blockNumber);
QTextCursor leftCursor = m_leftEditor->textCursor();
leftCursor.setPosition(leftBlock.position());
m_leftEditor->setTextCursor(leftCursor);
QTextBlock rightBlock = m_rightEditor->document()->findBlockByNumber(blockNumber);
QTextCursor rightCursor = m_rightEditor->textCursor();
rightCursor.setPosition(rightBlock.position());
m_rightEditor->setTextCursor(rightCursor);
m_leftEditor->centerCursor();
m_rightEditor->centerCursor();
}
QTextCodec *DiffEditorWidget::codec() const
{
return const_cast<QTextCodec *>(m_leftEditor->codec());
}
SnippetEditorWidget *DiffEditorWidget::leftEditor() const
{
return m_leftEditor;
}
SnippetEditorWidget *DiffEditorWidget::rightEditor() const
{
return m_rightEditor;
}
bool DiffEditorWidget::isWhitespace(const QChar &c) const
{
if (c == QLatin1Char(' ') || c == QLatin1Char('\t'))
return true;
return false;
}
bool DiffEditorWidget::isWhitespace(const Diff &diff) const
{
for (int i = 0; i < diff.text.count(); i++) {
if (!isWhitespace(diff.text.at(i)))
return false;
}
return true;
}
bool DiffEditorWidget::isEqual(const QList<Diff> &diffList, int diffNumber) const
{
const Diff &diff = diffList.at(diffNumber);
if (diff.command == Diff::Equal)
return true;
if (diff.text.count() == 0)
return true;
if (!m_ignoreWhitespaces)
return false;
if (isWhitespace(diff) == false)
return false;
if (diffNumber == 0 || diffNumber == diffList.count() - 1)
return false; // it's a Diff start or end
// Examine previous diff
if (diffNumber > 0) {
const Diff &previousDiff = diffList.at(diffNumber - 1);
if (previousDiff.command == Diff::Equal) {
const int previousDiffCount = previousDiff.text.count();
if (previousDiffCount && isWhitespace(previousDiff.text.at(previousDiffCount - 1)))
return true;
} else if (diff.command != previousDiff.command
&& isWhitespace(previousDiff)) {
return true;
}
}
// Examine next diff
if (diffNumber < diffList.count() - 1) {
const Diff &nextDiff = diffList.at(diffNumber + 1);
if (nextDiff.command == Diff::Equal) {
const int nextDiffCount = nextDiff.text.count();
if (nextDiffCount && isWhitespace(nextDiff.text.at(0)))
return true;
} else if (diff.command != nextDiff.command
&& isWhitespace(nextDiff)) {
return true;
}
}
return false;
}
QList<TextLineData> DiffEditorWidget::assemblyRows(const QStringList &lines,
const QMap<int, int> &lineSpans,
const QMap<int, int> &changedPositions,
QMap<int, int> *outputChangedPositions) const
{
QList<TextLineData> data;
int spanOffset = 0;
int pos = 0;
QMap<int, int>::ConstIterator changedIt = changedPositions.constBegin();
QMap<int, int>::ConstIterator changedEnd = changedPositions.constEnd();
const int lineCount = lines.count();
for (int i = 0; i <= lineCount; i++) {
for (int j = 0; j < lineSpans.value(i); j++) {
data.append(TextLineData(TextLineData::Separator));
spanOffset++;
}
if (i < lineCount) {
const int textLength = lines.at(i).count() + 1;
pos += textLength;
data.append(lines.at(i));
}
while (changedIt != changedEnd) {
if (changedIt.key() >= pos)
break;
const int startPos = changedIt.key() + spanOffset;
const int endPos = changedIt.value() + spanOffset;
if (outputChangedPositions)
outputChangedPositions->insert(startPos, endPos);
++changedIt;
}
}
return data;
}
ChunkData DiffEditorWidget::calculateOriginalData(const QList<Diff> &diffList) const
{
ChunkData chunkData;
QStringList leftLines;
QStringList rightLines;
leftLines.append(QString());
rightLines.append(QString());
QMap<int, int> leftLineSpans;
QMap<int, int> rightLineSpans;
QMap<int, int> leftChangedPositions;
QMap<int, int> rightChangedPositions;
QList<int> leftEqualLines;
QList<int> rightEqualLines;
int currentLeftLine = 0;
int currentLeftPos = 0;
int currentLeftLineOffset = 0;
int currentRightLine = 0;
int currentRightPos = 0;
int currentRightLineOffset = 0;
int lastAlignedLeftLine = -1;
int lastAlignedRightLine = -1;
bool lastLeftLineEqual = true;
bool lastRightLineEqual = true;
for (int i = 0; i < diffList.count(); i++) {
Diff diff = diffList.at(i);
const QStringList lines = diff.text.split(QLatin1Char('\n'));
const bool equal = isEqual(diffList, i);
if (diff.command == Diff::Insert) {
lastRightLineEqual = lastRightLineEqual && equal;
} else if (diff.command == Diff::Delete) {
lastLeftLineEqual = lastLeftLineEqual && equal;
}
const int lastLeftPos = currentLeftPos;
const int lastRightPos = currentRightPos;
for (int j = 0; j < lines.count(); j++) {
const QString line = lines.at(j);
if (j > 0) {
if (diff.command == Diff::Equal) {
if (lastLeftLineEqual && lastRightLineEqual) {
leftEqualLines.append(currentLeftLine);
rightEqualLines.append(currentRightLine);
}
}
if (diff.command != Diff::Insert) {
currentLeftLine++;
currentLeftLineOffset++;
leftLines.append(QString());
currentLeftPos++;
lastLeftLineEqual = !line.count() || equal;
}
if (diff.command != Diff::Delete) {
currentRightLine++;
currentRightLineOffset++;
rightLines.append(QString());
currentRightPos++;
lastRightLineEqual = !line.count() || equal;
}
}
if (diff.command == Diff::Delete) {
leftLines.last() += line;
currentLeftPos += line.count();
}
else if (diff.command == Diff::Insert) {
rightLines.last() += line;
currentRightPos += line.count();
}
else if (diff.command == Diff::Equal) {
if ((line.count() || (j && j < lines.count() - 1)) && // don't treat empty ending line as a line to be aligned unless a line is a one char '/n' only.
currentLeftLine != lastAlignedLeftLine &&
currentRightLine != lastAlignedRightLine) {
// apply line spans before the current lines
if (currentLeftLineOffset < currentRightLineOffset) {
const int spans = currentRightLineOffset - currentLeftLineOffset;
leftLineSpans[currentLeftLine] = spans;
} else if (currentRightLineOffset < currentLeftLineOffset) {
const int spans = currentLeftLineOffset - currentRightLineOffset;
rightLineSpans[currentRightLine] = spans;
}
currentLeftLineOffset = 0;
currentRightLineOffset = 0;
lastAlignedLeftLine = currentLeftLine;
lastAlignedRightLine = currentRightLine;
}
leftLines.last() += line;
rightLines.last() += line;
currentLeftPos += line.count();
currentRightPos += line.count();
}
}
if (!equal) {
if (diff.command == Diff::Delete && lastLeftPos != currentLeftPos)
leftChangedPositions.insert(lastLeftPos, currentLeftPos);
else if (diff.command == Diff::Insert && lastRightPos != currentRightPos)
rightChangedPositions.insert(lastRightPos, currentRightPos);
}
}
if (diffList.count() && diffList.last().command == Diff::Equal) {
if (currentLeftLine != lastAlignedLeftLine &&
currentRightLine != lastAlignedRightLine) {
// apply line spans before the current lines
if (currentLeftLineOffset < currentRightLineOffset) {
const int spans = currentRightLineOffset - currentLeftLineOffset;
leftLineSpans[currentLeftLine] = spans;
} else if (currentRightLineOffset < currentLeftLineOffset) {
const int spans = currentLeftLineOffset - currentRightLineOffset;
rightLineSpans[currentRightLine] = spans;
}
}
if (lastLeftLineEqual && lastRightLineEqual) {
leftEqualLines.append(currentLeftLine);
rightEqualLines.append(currentRightLine);
}
}
QList<TextLineData> leftData = assemblyRows(leftLines,
leftLineSpans,
leftChangedPositions,
&chunkData.changedLeftPositions);
QList<TextLineData> rightData = assemblyRows(rightLines,
rightLineSpans,
rightChangedPositions,
&chunkData.changedRightPositions);
// fill ending separators
for (int i = leftData.count(); i < rightData.count(); i++)
leftData.append(TextLineData(TextLineData::Separator));
for (int i = rightData.count(); i < leftData.count(); i++)
rightData.append(TextLineData(TextLineData::Separator));
const int visualLineCount = leftData.count();
int l = 0;
int r = 0;
for (int i = 0; i < visualLineCount; i++) {
RowData row(leftData.at(i), rightData.at(i));
if (row.leftLine.textLineType == TextLineData::Separator
&& row.rightLine.textLineType == TextLineData::Separator)
row.equal = true;
if (row.leftLine.textLineType == TextLineData::TextLine
&& row.rightLine.textLineType == TextLineData::TextLine
&& leftEqualLines.contains(l)
&& rightEqualLines.contains(r))
row.equal = true;
chunkData.rows.append(row);
if (leftData.at(i).textLineType == TextLineData::TextLine)
l++;
if (rightData.at(i).textLineType == TextLineData::TextLine)
r++;
}
return chunkData;
}
FileData DiffEditorWidget::calculateContextData(const ChunkData &originalData) const
{
if (m_contextLinesNumber < 0)
return FileData(originalData);
const int joinChunkThreshold = 1;
FileData fileData;
QMap<int, bool> hiddenRows;
int i = 0;
while (i < originalData.rows.count()) {
const RowData &row = originalData.rows[i];
if (row.equal) {
// count how many equal
int equalRowStart = i;
i++;
while (i < originalData.rows.count()) {
if (!originalData.rows.at(i).equal)
break;
i++;
}
const bool first = equalRowStart == 0; // includes first line?
const bool last = i == originalData.rows.count(); // includes last line?
const int firstLine = first ? 0 : equalRowStart + m_contextLinesNumber;
const int lastLine = last ? originalData.rows.count() : i - m_contextLinesNumber;
if (firstLine < lastLine - joinChunkThreshold) {
for (int j = firstLine; j < lastLine; j++) {
hiddenRows.insert(j, true);
}
}
} else {
// iterate to the next row
i++;
}
}
i = 0;
int leftCharCounter = 0;
int rightCharCounter = 0;
QMap<int, int>::ConstIterator leftChangedIt = originalData.changedLeftPositions.constBegin();
QMap<int, int>::ConstIterator rightChangedIt = originalData.changedRightPositions.constBegin();
while (i < originalData.rows.count()) {
if (!hiddenRows.contains(i)) {
ChunkData chunkData;
int leftOffset = leftCharCounter;
int rightOffset = rightCharCounter;
chunkData.contextChunk = false;
while (i < originalData.rows.count()) {
if (hiddenRows.contains(i))
break;
RowData rowData = originalData.rows.at(i);
chunkData.rows.append(rowData);
leftCharCounter += rowData.leftLine.text.count() + 1; // +1 for '\n'
rightCharCounter += rowData.rightLine.text.count() + 1; // +1 for '\n'
i++;
}
while (leftChangedIt != originalData.changedLeftPositions.constEnd()) {
if (leftChangedIt.key() < leftOffset
|| leftChangedIt.key() > leftCharCounter)
break;
const int startPos = leftChangedIt.key();
const int endPos = leftChangedIt.value();
chunkData.changedLeftPositions.insert(startPos - leftOffset, endPos - leftOffset);
leftChangedIt++;
}
while (rightChangedIt != originalData.changedRightPositions.constEnd()) {
if (rightChangedIt.key() < rightOffset
|| rightChangedIt.key() > rightCharCounter)
break;
const int startPos = rightChangedIt.key();
const int endPos = rightChangedIt.value();
chunkData.changedRightPositions.insert(startPos - rightOffset, endPos - rightOffset);
rightChangedIt++;
}
fileData.chunks.append(chunkData);
} else {
ChunkData chunkData;
chunkData.contextChunk = true;
while (i < originalData.rows.count()) {
if (!hiddenRows.contains(i))
break;
RowData rowData = originalData.rows.at(i);
chunkData.rows.append(rowData);
leftCharCounter += rowData.leftLine.text.count() + 1; // +1 for '\n'
rightCharCounter += rowData.rightLine.text.count() + 1; // +1 for '\n'
i++;
}
fileData.chunks.append(chunkData);
}
}
return fileData;
}
void DiffEditorWidget::showDiff()
{
// TODO: remember the line number of the line in the middle
const int verticalValue = m_leftEditor->verticalScrollBar()->value();
const int leftHorizontalValue = m_leftEditor->horizontalScrollBar()->value();
const int rightHorizontalValue = m_rightEditor->horizontalScrollBar()->value();
clear();
QString leftText, rightText;
int blockNumber = 0;
QChar separator = QLatin1Char('\n');
for (int i = 0; i < m_contextFileData.count(); i++) {
const FileData &contextFileData = m_contextFileData.at(i);
int leftLineNumber = 0;
int rightLineNumber = 0;
m_leftEditor->setFileInfo(blockNumber, contextFileData.leftFileInfo);
m_rightEditor->setFileInfo(blockNumber, contextFileData.rightFileInfo);
leftText += separator;
rightText += separator;
blockNumber++;
for (int j = 0; j < contextFileData.chunks.count(); j++) {
ChunkData chunkData = contextFileData.chunks.at(j);
if (chunkData.contextChunk) {
const int skippedLines = chunkData.rows.count();
m_leftEditor->setSkippedLines(blockNumber, skippedLines);
m_rightEditor->setSkippedLines(blockNumber, skippedLines);
leftText += separator;
rightText += separator;
blockNumber++;
}
for (int k = 0; k < chunkData.rows.count(); k++) {
RowData rowData = chunkData.rows.at(k);
TextLineData leftLineData = rowData.leftLine;
TextLineData rightLineData = rowData.rightLine;
if (leftLineData.textLineType == TextLineData::TextLine) {
leftText += leftLineData.text;
leftLineNumber++;
m_leftEditor->setLineNumber(blockNumber, leftLineNumber);
} else if (leftLineData.textLineType == TextLineData::Separator) {
m_leftEditor->setSeparator(blockNumber, true);
}
if (rightLineData.textLineType == TextLineData::TextLine) {
rightText += rightLineData.text;
rightLineNumber++;
m_rightEditor->setLineNumber(blockNumber, rightLineNumber);
} else if (rightLineData.textLineType == TextLineData::Separator) {
m_rightEditor->setSeparator(blockNumber, true);
}
leftText += separator;
rightText += separator;
blockNumber++;
}
}
}
if (leftText.isEmpty() && rightText.isEmpty())
return;
m_leftEditor->setPlainText(leftText);
m_rightEditor->setPlainText(rightText);
colorDiff(m_contextFileData);
QTextBlock leftBlock = m_leftEditor->document()->firstBlock();
QTextBlock rightBlock = m_rightEditor->document()->firstBlock();
for (int i = 0; i < m_contextFileData.count(); i++) {
const FileData &contextFileData = m_contextFileData.at(i);
leftBlock = leftBlock.next();
rightBlock = rightBlock.next();
for (int j = 0; j < contextFileData.chunks.count(); j++) {
ChunkData chunkData = contextFileData.chunks.at(j);
if (chunkData.contextChunk) {
TextEditor::BaseTextDocumentLayout::setFoldingIndent(leftBlock, FILE_LEVEL);
TextEditor::BaseTextDocumentLayout::setFoldingIndent(rightBlock, FILE_LEVEL);
leftBlock = leftBlock.next();
rightBlock = rightBlock.next();
}
const int indent = chunkData.contextChunk ? CHUNK_LEVEL : FILE_LEVEL;
for (int k = 0; k < chunkData.rows.count(); k++) {
TextEditor::BaseTextDocumentLayout::setFoldingIndent(leftBlock, indent);
TextEditor::BaseTextDocumentLayout::setFoldingIndent(rightBlock, indent);
leftBlock = leftBlock.next();
rightBlock = rightBlock.next();
}
}
}
blockNumber = 0;
for (int i = 0; i < m_contextFileData.count(); i++) {
const FileData &contextFileData = m_contextFileData.at(i);
blockNumber++;
for (int j = 0; j < contextFileData.chunks.count(); j++) {
ChunkData chunkData = contextFileData.chunks.at(j);
if (chunkData.contextChunk) {
QTextBlock leftBlock = m_leftEditor->document()->findBlockByNumber(blockNumber);
TextEditor::BaseTextDocumentLayout::doFoldOrUnfold(leftBlock, false);
QTextBlock rightBlock = m_rightEditor->document()->findBlockByNumber(blockNumber);
TextEditor::BaseTextDocumentLayout::doFoldOrUnfold(rightBlock, false);
blockNumber++;
}
blockNumber += chunkData.rows.count();
}
}
m_foldingBlocker = true;
BaseTextDocumentLayout *leftLayout = qobject_cast<BaseTextDocumentLayout *>(m_leftEditor->document()->documentLayout());
if (leftLayout) {
leftLayout->requestUpdate();
leftLayout->emitDocumentSizeChanged();
}
BaseTextDocumentLayout *rightLayout = qobject_cast<BaseTextDocumentLayout *>(m_rightEditor->document()->documentLayout());
if (rightLayout) {
rightLayout->requestUpdate();
rightLayout->emitDocumentSizeChanged();
}
m_foldingBlocker = false;
m_leftEditor->verticalScrollBar()->setValue(verticalValue);
m_rightEditor->verticalScrollBar()->setValue(verticalValue);
m_leftEditor->horizontalScrollBar()->setValue(leftHorizontalValue);
m_rightEditor->horizontalScrollBar()->setValue(rightHorizontalValue);
m_leftEditor->updateFoldingHighlight(QPoint(-1, -1));
m_rightEditor->updateFoldingHighlight(QPoint(-1, -1));
}
QList<QTextEdit::ExtraSelection> DiffEditorWidget::colorPositions(
const QTextCharFormat &format,
QTextCursor &cursor,
const QMap<int, int> &positions) const
{
QList<QTextEdit::ExtraSelection> lineSelections;
cursor.setPosition(0);
QMapIterator<int, int> itPositions(positions);
while (itPositions.hasNext()) {
itPositions.next();
cursor.setPosition(itPositions.key());
cursor.setPosition(itPositions.value(), QTextCursor::KeepAnchor);
QTextEdit::ExtraSelection selection;
selection.cursor = cursor;
selection.format = format;
lineSelections.append(selection);
}
return lineSelections;
}
void DiffEditorWidget::colorDiff(const QList<FileData> &fileDataList)
{
QTextCharFormat leftLineFormat;
leftLineFormat.setBackground(QColor(255, 223, 223));
leftLineFormat.setProperty(QTextFormat::FullWidthSelection, true);
QTextCharFormat leftCharFormat;
leftCharFormat.setBackground(QColor(255, 175, 175));
leftCharFormat.setProperty(QTextFormat::FullWidthSelection, true);
QTextCharFormat rightLineFormat;
rightLineFormat.setBackground(QColor(223, 255, 223));
rightLineFormat.setProperty(QTextFormat::FullWidthSelection, true);
QTextCharFormat rightCharFormat;
rightCharFormat.setBackground(QColor(175, 255, 175));
rightCharFormat.setProperty(QTextFormat::FullWidthSelection, true);
QPalette pal = m_leftEditor->extraArea()->palette();
pal.setCurrentColorGroup(QPalette::Active);
QTextCharFormat spanLineFormat;
spanLineFormat.setBackground(pal.color(QPalette::Background));
spanLineFormat.setProperty(QTextFormat::FullWidthSelection, true);
QTextCharFormat chunkLineFormat;
chunkLineFormat.setBackground(QColor(175, 215, 231));
chunkLineFormat.setProperty(QTextFormat::FullWidthSelection, true);
QTextCharFormat fileLineFormat;
fileLineFormat.setBackground(QColor(255, 255, 0));
// fileLineFormat.setBackground(QColor(130, 60, 0));
fileLineFormat.setProperty(QTextFormat::FullWidthSelection, true);
int leftPos = 0;
int rightPos = 0;
QMap<int, int> leftLinePos;
QMap<int, int> rightLinePos;
QMap<int, int> leftCharPos;
QMap<int, int> rightCharPos;
QMap<int, int> leftSkippedPos;
QMap<int, int> rightSkippedPos;
QMap<int, int> leftChunkPos;
QMap<int, int> rightChunkPos;
QMap<int, int> leftFilePos;
QMap<int, int> rightFilePos;
int leftLastDiffBlockStartPos = 0;
int rightLastDiffBlockStartPos = 0;
int leftLastSkippedBlockStartPos = 0;
int rightLastSkippedBlockStartPos = 0;
for (int i = 0; i < fileDataList.count(); i++) {
leftFilePos[leftPos] = leftPos + 1;
rightFilePos[rightPos] = rightPos + 1;
leftPos++; // for file line
rightPos++; // for file line
const FileData &fileData = fileDataList.at(i);
for (int j = 0; j < fileData.chunks.count(); j++) {
ChunkData chunkData = fileData.chunks.at(j);
if (chunkData.contextChunk) {
leftChunkPos[leftPos] = leftPos + 1;
rightChunkPos[rightPos] = rightPos + 1;
leftPos++; // for chunk line
rightPos++; // for chunk line
}
const int leftFileOffset = leftPos;
const int rightFileOffset = rightPos;
leftLastDiffBlockStartPos = leftPos;
rightLastDiffBlockStartPos = rightPos;
leftLastSkippedBlockStartPos = leftPos;
rightLastSkippedBlockStartPos = rightPos;
QMapIterator<int, int> itLeft(chunkData.changedLeftPositions);
while (itLeft.hasNext()) {
itLeft.next();
leftCharPos[itLeft.key() + leftFileOffset] = itLeft.value() + leftFileOffset;
}
QMapIterator<int, int> itRight(chunkData.changedRightPositions);
while (itRight.hasNext()) {
itRight.next();
rightCharPos[itRight.key() + rightFileOffset] = itRight.value() + rightFileOffset;
}
for (int k = 0; k < chunkData.rows.count(); k++) {
RowData rowData = chunkData.rows.at(k);
leftPos += rowData.leftLine.text.count() + 1; // +1 for '\n'
rightPos += rowData.rightLine.text.count() + 1; // +1 for '\n'
if (!rowData.equal) {
if (rowData.leftLine.textLineType == TextLineData::TextLine) {
leftLinePos[leftLastDiffBlockStartPos] = leftPos;
leftLastSkippedBlockStartPos = leftPos;
} else {
leftSkippedPos[leftLastSkippedBlockStartPos] = leftPos;
leftLastDiffBlockStartPos = leftPos;
}
if (rowData.rightLine.textLineType == TextLineData::TextLine) {
rightLinePos[rightLastDiffBlockStartPos] = rightPos;
rightLastSkippedBlockStartPos = rightPos;
} else {
rightSkippedPos[rightLastSkippedBlockStartPos] = rightPos;
rightLastDiffBlockStartPos = rightPos;
}
} else {
leftLastDiffBlockStartPos = leftPos;
rightLastDiffBlockStartPos = rightPos;
leftLastSkippedBlockStartPos = leftPos;
rightLastSkippedBlockStartPos = rightPos;
}
}
}
}
QTextCursor leftCursor = m_leftEditor->textCursor();
QTextCursor rightCursor = m_rightEditor->textCursor();
QList<QTextEdit::ExtraSelection> leftSelections
= colorPositions(leftLineFormat, leftCursor, leftLinePos);
leftSelections
+= colorPositions(spanLineFormat, leftCursor, leftSkippedPos);
leftSelections
+= colorPositions(chunkLineFormat, leftCursor, leftChunkPos);
leftSelections
+= colorPositions(fileLineFormat, leftCursor, leftFilePos);
leftSelections
+= colorPositions(leftCharFormat, leftCursor, leftCharPos);
QList<QTextEdit::ExtraSelection> rightSelections
= colorPositions(rightLineFormat, rightCursor, rightLinePos);
rightSelections
+= colorPositions(spanLineFormat, rightCursor, rightSkippedPos);
rightSelections
+= colorPositions(chunkLineFormat, rightCursor, rightChunkPos);
rightSelections
+= colorPositions(fileLineFormat, rightCursor, rightFilePos);
rightSelections
+= colorPositions(rightCharFormat, rightCursor, rightCharPos);
m_leftEditor->setExtraSelections(BaseTextEditorWidget::OtherSelection,
m_leftEditor->extraSelections(BaseTextEditorWidget::OtherSelection)
+ leftSelections);
m_rightEditor->setExtraSelections(BaseTextEditorWidget::OtherSelection,
m_rightEditor->extraSelections(BaseTextEditorWidget::OtherSelection)
+ rightSelections);
}
void DiffEditorWidget::leftVSliderChanged()
{
m_rightEditor->verticalScrollBar()->setValue(m_leftEditor->verticalScrollBar()->value());
}
void DiffEditorWidget::rightVSliderChanged()
{
m_leftEditor->verticalScrollBar()->setValue(m_rightEditor->verticalScrollBar()->value());
}
void DiffEditorWidget::leftHSliderChanged()
{
if (m_syncScrollBars)
m_rightEditor->horizontalScrollBar()->setValue(m_leftEditor->horizontalScrollBar()->value());
}
void DiffEditorWidget::rightHSliderChanged()
{
if (m_syncScrollBars)
m_leftEditor->horizontalScrollBar()->setValue(m_rightEditor->horizontalScrollBar()->value());
}
void DiffEditorWidget::leftCursorPositionChanged()
{
leftVSliderChanged();
leftHSliderChanged();
emit navigatedToDiffFile(m_leftEditor->fileIndexForBlockNumber(m_leftEditor->textCursor().blockNumber()));
}
void DiffEditorWidget::rightCursorPositionChanged()
{
rightVSliderChanged();
rightHSliderChanged();
emit navigatedToDiffFile(m_rightEditor->fileIndexForBlockNumber(m_rightEditor->textCursor().blockNumber()));
}
void DiffEditorWidget::leftDocumentSizeChanged()
{
synchronizeFoldings(m_leftEditor, m_rightEditor);
}
void DiffEditorWidget::rightDocumentSizeChanged()
{
synchronizeFoldings(m_rightEditor, m_leftEditor);
}
void DiffEditorWidget::toggleScrollBarSynchronization(bool on)
{
m_syncScrollBars = on;
}
/* Special version of that method (original: TextEditor::BaseTextDocumentLayout::doFoldOrUnfold())
The hack lies in fact, that when unfolding all direct sub-blocks are made visible,
while some of them need to stay invisible (i.e. unfolded chunk lines)
*/
static void doFoldOrUnfold(DiffViewEditorWidget *editor, const QTextBlock &block, bool unfold)
{
if (!TextEditor::BaseTextDocumentLayout::canFold(block))
return;
QTextBlock b = block.next();
int indent = TextEditor::BaseTextDocumentLayout::foldingIndent(block);
while (b.isValid() && TextEditor::BaseTextDocumentLayout::foldingIndent(b) > indent && (unfold || b.next().isValid())) {
if (unfold && editor->isChunkLine(b.blockNumber()) && !TextEditor::BaseTextDocumentLayout::isFolded(b)) {
b.setVisible(false);
b.setLineCount(0);
} else {
b.setVisible(unfold);
b.setLineCount(unfold ? qMax(1, b.layout()->lineCount()) : 0);
}
if (unfold) { // do not unfold folded sub-blocks
if (TextEditor::BaseTextDocumentLayout::isFolded(b) && b.next().isValid()) {
int jndent = TextEditor::BaseTextDocumentLayout::foldingIndent(b);
b = b.next();
while (b.isValid() && TextEditor::BaseTextDocumentLayout::foldingIndent(b) > jndent)
b = b.next();
continue;
}
}
b = b.next();
}
TextEditor::BaseTextDocumentLayout::setFolded(block, !unfold);
}
void DiffEditorWidget::synchronizeFoldings(DiffViewEditorWidget *source, DiffViewEditorWidget *destination)
{
if (m_foldingBlocker)
return;
m_foldingBlocker = true;
QTextBlock sourceBlock = source->document()->firstBlock();
QTextBlock destinationBlock = destination->document()->firstBlock();
while (sourceBlock.isValid() && destinationBlock.isValid()) {
if (TextEditor::BaseTextDocumentLayout::canFold(sourceBlock)) {
const bool isSourceFolded = TextEditor::BaseTextDocumentLayout::isFolded(sourceBlock);
const bool isDestinationFolded = TextEditor::BaseTextDocumentLayout::isFolded(destinationBlock);
if (isSourceFolded != isDestinationFolded) {
if (source->isFileLine(sourceBlock.blockNumber())) {
doFoldOrUnfold(source, sourceBlock, !isSourceFolded);
doFoldOrUnfold(destination, destinationBlock, !isSourceFolded);
} else {
if (isSourceFolded) { // we fold the destination (shrinking)
QTextBlock previousSource = sourceBlock.previous(); // skippedLines
QTextBlock previousDestination = destinationBlock.previous(); // skippedLines
if (source->isChunkLine(previousSource.blockNumber())) {
QTextBlock firstVisibleDestinationBlock = destination->firstVisibleBlock();
QTextBlock firstDestinationBlock = destination->document()->firstBlock();
TextEditor::BaseTextDocumentLayout::doFoldOrUnfold(destinationBlock, !isSourceFolded);
TextEditor::BaseTextDocumentLayout::setFoldingIndent(sourceBlock, CHUNK_LEVEL);
TextEditor::BaseTextDocumentLayout::setFoldingIndent(destinationBlock, CHUNK_LEVEL);
previousSource.setVisible(true);
previousSource.setLineCount(1);
previousDestination.setVisible(true);
previousDestination.setLineCount(1);
sourceBlock.setVisible(false);
sourceBlock.setLineCount(0);
destinationBlock.setVisible(false);
destinationBlock.setLineCount(0);
TextEditor::BaseTextDocumentLayout::setFolded(previousSource, true);
TextEditor::BaseTextDocumentLayout::setFolded(previousDestination, true);
if (firstVisibleDestinationBlock == destinationBlock) {
/*
The following hack is completely crazy. That's the only way to scroll 1 line up
in case destinationBlock was the top visible block.
There is no need to scroll the source since this is in sync anyway
(leftSliderChanged(), rightSliderChanged())
*/
destination->verticalScrollBar()->setValue(destination->verticalScrollBar()->value() - 1);
destination->verticalScrollBar()->setValue(destination->verticalScrollBar()->value() + 1);
if (firstVisibleDestinationBlock.previous() == firstDestinationBlock) {
/*
Even more crazy case: the destinationBlock was the first top visible block.
*/
destination->verticalScrollBar()->setValue(0);
}
}
}
} else { // we unfold the destination (expanding)
if (source->isChunkLine(sourceBlock.blockNumber())) {
QTextBlock nextSource = sourceBlock.next();
QTextBlock nextDestination = destinationBlock.next();
TextEditor::BaseTextDocumentLayout::doFoldOrUnfold(destinationBlock, !isSourceFolded);
TextEditor::BaseTextDocumentLayout::setFoldingIndent(nextSource, FILE_LEVEL);
TextEditor::BaseTextDocumentLayout::setFoldingIndent(nextDestination, FILE_LEVEL);
sourceBlock.setVisible(false);
sourceBlock.setLineCount(0);
destinationBlock.setVisible(false);
destinationBlock.setLineCount(0);
TextEditor::BaseTextDocumentLayout::setFolded(nextSource, false);
TextEditor::BaseTextDocumentLayout::setFolded(nextDestination, false);
}
}
}
break; // only one should be synchronized
}
}
sourceBlock = sourceBlock.next();
destinationBlock = destinationBlock.next();
}
BaseTextDocumentLayout *sourceLayout = qobject_cast<BaseTextDocumentLayout *>(source->document()->documentLayout());
if (sourceLayout) {
sourceLayout->requestUpdate();
sourceLayout->emitDocumentSizeChanged();
}
QWidget *ea = source->extraArea();
if (ea->contentsRect().contains(ea->mapFromGlobal(QCursor::pos())))
source->updateFoldingHighlight(source->mapFromGlobal(QCursor::pos()));
BaseTextDocumentLayout *destinationLayout = qobject_cast<BaseTextDocumentLayout *>(destination->document()->documentLayout());
if (destinationLayout) {
destinationLayout->requestUpdate();
destinationLayout->emitDocumentSizeChanged();
}
m_foldingBlocker = false;
}
} // namespace DiffEditor
#include "diffeditorwidget.moc"