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RedPanda-CPP/RedPandaIDE/qsynedit/SynEdit.cpp

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#include "SynEdit.h"
#include <QApplication>
#include <QFontMetrics>
#include <algorithm>
SynEdit::SynEdit(QWidget *parent, Qt::WindowFlags f) : QFrame(parent,f)
{
mPaintLock = 0;
mPainting = false;
mLines = std::make_shared<SynEditStringList>();
mOrigLines = mLines;
//fPlugins := TList.Create;
mMouseMoved = false;
mUndoing = false;
mLines->connect(mLines.get(), &SynEditStringList::changed, this, &SynEdit::linesChanged);
mLines->connect(mLines.get(), &SynEditStringList::changing, this, &SynEdit::linesChanging);
mLines->connect(mLines.get(), &SynEditStringList::cleared, this, &SynEdit::linesCleared);
mLines->connect(mLines.get(), &SynEditStringList::deleted, this, &SynEdit::linesDeleted);
mLines->connect(mLines.get(), &SynEditStringList::inserted, this, &SynEdit::linesInserted);
mLines->connect(mLines.get(), &SynEditStringList::putted, this, &SynEdit::linesPutted);
#ifdef Q_OS_WIN
mFontDummy = QFont("Consolas",10);
#elif Q_OS_LINUX
mFontDummy = QFont("terminal",14);
#else
#error "Not supported!"
#endif
mUndoList = std::make_shared<SynEditUndoList>();
mUndoList->connect(mUndoList.get(), &SynEditUndoList::addedUndo, this, &SynEdit::undoAdded);
mOrigUndoList = mUndoList;
mRedoList = std::make_shared<SynEditUndoList>();
mRedoList->connect(mRedoList.get(), &SynEditUndoList::addedUndo, this, &SynEdit::redoAdded);
mOrigRedoList = mRedoList;
//DoubleBuffered = false;
mActiveLineColor = QColor();
mSelectedBackground = QColor();
mSelectedForeground = QColor();
mBookMarkOpt.connect(&mBookMarkOpt, &SynBookMarkOpt::changed, this, &SynEdit::bookMarkOptionsChanged);
// fRightEdge has to be set before FontChanged is called for the first time
mRightEdge = 80;
mGutter.setRightOffset(21);
mGutter.connect(&mGutter, &SynGutter::changed, this, &SynEdit::gutterChanged);
mGutterWidth = mGutter.width();
mTextOffset = mGutterWidth + 2;
//ControlStyle := ControlStyle + [csOpaque, csSetCaption, csNeedsBorderPaint];
//Height := 150;
//Width := 200;
this->setCursor(Qt::CursorShape::IBeamCursor);
//TabStop := True;
mInserting = true;
mMaxScrollWidth = 1024;
mScrollBars = SynScrollStyle::ssBoth;
this->setFrameShape(QFrame::Panel);
this->setFrameShadow(QFrame::Sunken);
this->setLineWidth(1);
mInsertCaret = SynEditCaretType::ctVerticalLine;
mOverwriteCaret = SynEditCaretType::ctBlock;
mSelectionMode = SynSelectionMode::smNormal;
mActiveSelectionMode = SynSelectionMode::smNormal;
//stop qt to auto fill background
setAutoFillBackground(false);
//fFocusList := TList.Create;
//fKbdHandler := TSynEditKbdHandler.Create;
//fMarkList.OnChange := MarkListChange;
setDefaultKeystrokes();
mRightEdgeColor = QColorConstants::Svg::silver;
/* IME input */
mImeCount = 0;
mMBCSStepAside = false;
/* end of IME input */
mWantReturns = true;
mWantTabs = false;
mTabWidth = 4;
mLeftChar = 1;
mTopLine = 1;
mCaretX = 1;
mLastCaretX = 1;
mCaretY = 1;
mBlockBegin.Char = 1;
mBlockBegin.Line = 1;
mBlockEnd = mBlockBegin;
mOptions = eoAutoIndent | eoDragDropEditing | eoEnhanceEndKey |
eoScrollPastEol | eoShowScrollHint | eoSmartTabs | eoTabsToSpaces |
eoSmartTabDelete| eoGroupUndo;
mScrollTimer = new QTimer(this);
mScrollTimer->setInterval(100);
connect(mScrollTimer, &QTimer::timeout,this, &SynEdit::scrollTimerHandler);
mScrollHintColor = QColorConstants::Yellow;
mScrollHintFormat = SynScrollHintFormat::shfTopLineOnly;
synFontChanged();
}
int SynEdit::displayLineCount()
{
return lineToRow(mLines->count());
}
BufferCoord SynEdit::caretXY()
{
BufferCoord result;
result.Char = caretX();
result.Line = caretY();
return result;
}
int SynEdit::caretX()
{
return mCaretX;
}
int SynEdit::caretY()
{
return mCaretY;
}
void SynEdit::setCaretXY(const BufferCoord &value)
{
setCaretXYCentered(false,value);
}
void SynEdit::setCaretXYEx(bool CallEnsureCursorPos, BufferCoord value)
{
bool vTriggerPaint=true; //how to test it?
if (vTriggerPaint)
doOnPaintTransient(SynTransientType::ttBefore);
int nMaxX = maxScrollWidth() + 1;
if (value.Line > mLines->count())
value.Line = mLines->count();
if (value.Line < 1) {
// this is just to make sure if Lines stringlist should be empty
value.Line = 1;
if (!mOptions.testFlag(SynEditorOption::eoScrollPastEol)) {
nMaxX = 1;
}
} else {
if (!mOptions.testFlag(SynEditorOption::eoScrollPastEol))
nMaxX = mLines->getString(value.Line-1).length();
}
if ((value.Char > nMaxX) && (! (mOptions.testFlag(SynEditorOption::eoScrollPastEol)) ||
!(mOptions.testFlag(SynEditorOption::eoAutoSizeMaxScrollWidth))) )
value.Char = nMaxX;
if (value.Char < 1)
value.Char = 1;
if ((value.Char != mCaretX) || (value.Line != mCaretY)) {
incPaintLock();
auto action = finally([this]{
decPaintLock();
});
// simply include the flags, fPaintLock is > 0
if (mCaretX != value.Char) {
mCaretX = value.Char;
mStatusChanges.setFlag(SynStatusChange::scCaretX);
}
if (mCaretY != value.Line) {
if (!mActiveLineColor.isValid()) {
invalidateLine(value.Line);
invalidateLine(mCaretY);
}
mCaretY = value.Line;
mStatusChanges.setFlag(SynStatusChange::scCaretY);
}
// Call UpdateLastCaretX before DecPaintLock because the event handler it
// calls could raise an exception, and we don't want fLastCaretX to be
// left in an undefined state if that happens.
updateLastCaretX();
if (CallEnsureCursorPos)
ensureCursorPosVisible();
mStateFlags.setFlag(SynStateFlag::sfCaretChanged);
mStateFlags.setFlag(SynStateFlag::sfScrollbarChanged);
} else {
// Also call UpdateLastCaretX if the caret didn't move. Apps don't know
// anything about fLastCaretX and they shouldn't need to. So, to avoid any
// unwanted surprises, always update fLastCaretX whenever CaretXY is
// assigned to.
// Note to SynEdit developers: If this is undesirable in some obscure
// case, just save the value of fLastCaretX before assigning to CaretXY and
// restore it afterward as appropriate.
updateLastCaretX();
}
if (vTriggerPaint)
doOnPaintTransient(SynTransientType::ttAfter);
}
void SynEdit::setCaretXYCentered(bool ForceToMiddle, const BufferCoord &value)
{
incPaintLock();
auto action = finally([this] {
decPaintLock();
});
mStatusChanges.setFlag(SynStatusChange::scSelection);
setCaretXYEx(ForceToMiddle,value);
if selAvail() then
invalidateSelection();
mBlockBegin.Char = mCaretX;
mBlockBegin.Line = mCaretY;
mBlockEnd = mBlockBegin;
if (ForceToMiddle)
ensureCursorPosVisibleEx(true); // but here after block has been set
}
void SynEdit::invalidateGutter()
{
invalidateGutterLines(-1, -1);
}
void SynEdit::invalidateGutterLine(int aLine)
{
if ((aLine < 1) || (aLine > mLines->count()))
return;
invalidateGutterLines(aLine, aLine);
}
void SynEdit::invalidateGutterLines(int FirstLine, int LastLine)
{
QRect rcInval;
if (!isVisible())
return;
if (FirstLine == -1 && LastLine == -1) {
rcInval = QRect(clientLeft(), clientTop(), mGutterWidth, clientHeight());
if (mStateFlags.testFlag(SynStateFlag::sfLinesChanging))
mInvalidateRect = mInvalidateRect.united(rcInval);
else
update(rcInval);
} else {
// find the visible lines first
if (LastLine < FirstLine)
std::swap(LastLine, FirstLine);
if (mUseCodeFolding) {
FirstLine = lineToRow(FirstLine);
if (LastLine <= mLines->count())
LastLine = lineToRow(LastLine);
else
LastLine = INT_MAX;
}
FirstLine = std::max(FirstLine, topLine());
LastLine = std::min(LastLine, topLine() + linesInWindow());
// any line visible?
if (LastLine >= FirstLine) {
rcInval = {clientLeft(), clientTop()+mTextHeight * (FirstLine - topLine()),
mGutterWidth, mTextHeight * (LastLine - topLine() + 1)};
if (mStateFlags.testFlag(SynStateFlag::sfLinesChanging)) {
mInvalidateRect = mInvalidateRect.united(rcInval);
} else {
update(rcInval);
}
}
}
}
void SynEdit::clearAreaList(SynEditingAreaList areaList)
{
areaList.clear();
}
void SynEdit::computeCaret(int X, int Y)
{
DisplayCoord vCaretNearestPos = pixelsToNearestRowColumn(X, Y);
vCaretNearestPos.Row = MinMax(vCaretNearestPos.Row, 1, displayLineCount());
setInternalDisplayXY(vCaretNearestPos);
}
void SynEdit::computeScroll(int X, int Y)
{
QRect iScrollBounds; // relative to the client area
// don't scroll if dragging text from other control
// if (not MouseCapture) and (not Dragging) then begin
// fScrollTimer.Enabled := False;
// Exit;
// end;
iScrollBounds = QRect(mGutterWidth+this->frameWidth(), this->frameWidth(), mCharsInWindow * mCharWidth,
mLinesInWindow * mTextHeight);
if (X < iScrollBounds.left())
mScrollDeltaX = (X - iScrollBounds.left()) % mCharWidth - 1;
else if (X >= iScrollBounds.right())
mScrollDeltaX = (X - iScrollBounds.right()) % mCharWidth + 1;
else
mScrollDeltaX = 0;
if (Y < iScrollBounds.top())
mScrollDeltaY = (Y - iScrollBounds.top()) % mTextHeight - 1;
else if (Y >= iScrollBounds.bottom())
mScrollDeltaY = (Y - iScrollBounds.bottom()) % mTextHeight + 1;
else
mScrollDeltaY = 0;
if (mScrollDeltaX!=0 || mScrollDeltaY!=0)
mScrollTimer->start();
}
void SynEdit::doBlockIndent()
{
BufferCoord OrgCaretPos;
BufferCoord BB, BE;
QString StrToInsert;
int Run;
int e,x,i,InsertStrLen;
QString Spaces;
SynSelectionMode OrgSelectionMode;
BufferCoord InsertionPos;
OrgSelectionMode = mActiveSelectionMode;
OrgCaretPos = caretXY();
StrToInsert = nullptr;
if (selAvail()) {
auto action = finally([&,this]{
if (BE.Char > 1)
BE.Char+=Spaces.length();
setCaretAndSelection(OrgCaretPos,
{BB.Char + Spaces.length(), BB.Line}, BE);
setActiveSelectionMode(OrgSelectionMode);
});
// keep current selection detail
BB = blockBegin();
BE = blockEnd();
// build text to insert
if (BE.Char == 1) {
e = BE.Line - 1;
x = 1;
} else {
e = BE.Line;
if (mOptions.testFlag(SynEditorOption::eoTabsToSpaces))
x = caretX() + mTabWidth;
else
x = caretX() + 1;
}
if (mOptions.testFlag(eoTabsToSpaces)) {
InsertStrLen = (mTabWidth + 2) * (e - BB.Line) + mTabWidth + 1;
// chars per line * lines-1 + last line + null char
StrToInsert.resize(InsertStrLen);
Run = 0;
Spaces = QString(mTabWidth,' ') ;
} else {
InsertStrLen = 3 * (e - BB.Line) + 2;
// #9#13#10 * lines-1 + (last line's #9 + null char)
StrToInsert.resize(InsertStrLen);
Run = 0;
Spaces = "\t";
}
for (i = BB.Line; i<e;i++) {
StrToInsert.replace(Run,Spaces.length()+2,Spaces+"\r\n");
Run+=Spaces.length()+2;
}
StrToInsert.replace(Run,Spaces.length(),Spaces);
{
mUndoList->BeginBlock();
auto action2=finally([this]{
mUndoList->EndBlock();
});
InsertionPos.Line = BB.Line;
if (mActiveSelectionMode == SynSelectionMode::smColumn)
InsertionPos.Char = std::min(BB.Char, BE.Char);
else
InsertionPos.Char = 1;
insertBlock(InsertionPos, InsertionPos, StrToInsert, true);
mUndoList->AddChange(SynChangeReason::crIndent, BB, BE, "", SynSelectionMode::smColumn);
//We need to save the position of the end block for redo
mUndoList.AddChange(SynChangeReason::crIndent,
{BB.Char + Spaces.length(), BB.Line},
{BE.Char + Spaces.length(), BE.Line},
"", SynSelectionMode::smColumn);
//adjust the x position of orgcaretpos appropriately
OrgCaretPos.Char = X;
}
}
}
void SynEdit::incPaintLock()
{
mPaintLock ++ ;
}
void SynEdit::decPaintLock()
{
Q_ASSERT(mPaintLock > 0);
mPaintLock--;
if (mPaintLock == 0 ) {
if (mStateFlags.testFlag(SynStateFlag::sfScrollbarChanged))
updateScrollbars();
if (mStateFlags.testFlag(SynStateFlag::sfCaretChanged))
updateCaret();
if (mStatusChanges!=0)
doOnStatusChange(mStatusChanges);
}
}
bool SynEdit::mouseCapture()
{
return hasMouseTracking();
}
int SynEdit::clientWidth()
{
return frameRect().width()-2*frameWidth();
}
int SynEdit::clientHeight()
{
return frameRect().height()-2*frameWidth();
}
int SynEdit::clientTop()
{
return frameRect().top()+frameWidth();
}
int SynEdit::clientLeft()
{
return frameRect().left()+frameWidth();
}
QRect SynEdit::clientRect()
{
return QRect(frameRect().left()+frameWidth(),frameRect().top()+frameWidth(), frameRect().width()-2*frameWidth(), frameRect().height()-2*frameWidth());
}
void SynEdit::bookMarkOptionsChanged()
{
invalidateGutter();
}
void SynEdit::linesChanged()
{
SynSelectionMode vOldMode;
mStateFlags.setFlag(SynStateFlag::sfLinesChanging, false);
if (mUseCodeFolding)
rescan();
updateScrollBars();
vOldMode = mActiveSelectionMode;
setBlockBegin(caretXY());
mActiveSelectionMode = vOldMode;
update(mInvalidateRect);
mInvalidateRect = {0,0,0,0};
if (mGutter.showLineNumbers() && (mGutter.autoSize()))
mGutter.autoSizeDigitCount(mLines->count());
if (!mOptions.testFlag(SynEditorOption::eoScrollPastEof))
setTopLine(mTopLine);
}
void SynEdit::linesChanging()
{
mStateFlags.setFlag(SynStateFlag::sfLinesChanging);
}
void SynEdit::linesCleared()
{
if (mUseCodeFolding)
foldOnListCleared();
clearUndo();
// invalidate the *whole* client area
mInvalidateRect={0,0,0,0};
update();
// set caret and selected block to start of text
setCaretXY({1,1});
// scroll to start of text
setTopLine(1);
setLeftChar(1);
mStatusChanges.setFlag(SynStatusChange::scAll);
}
void SynEdit::linesDeleted(int index, int count)
{
if (mUseCodeFolding)
foldOnListDeleted(index + 1, count);
if (mHighlighter && mLines->count() > 0)
scanFrom(index);
invalidateLines(index + 1, INT_MAX);
invalidateGutterLines(index + 1, INT_MAX);
}
void SynEdit::linesInserted(int index, int count)
{
if (mUseCodeFolding)
foldOnListInserted(index + 1, count);
if (mHighlighter && mLines->count() > 0) {
int vLastScan = index;
do {
vLastScan = scanFrom(vLastScan);
vLastScan++;
} while (vLastScan < index + count) ;
}
invalidateLines(index + 1, INT_MAX);
invalidateGutterLines(index + 1, INT_MAX);
if (mOptions.setFlag(SynEditorOption::eoAutoSizeMaxScrollWidth)) {
int L = mLines->expandedStringLength(index);
if (L > mMaxScrollWidth)
setMaxScrollWidth(L);
}
}
void SynEdit::linesPutted(int index, int count)
{
int vEndLine = index + 1;
if (mHighlighter) {
vEndLine = std::max(vEndLine, scanFrom(index) + 1);
// If this editor is chained then the real owner of text buffer will probably
// have already parsed the changes, so ScanFrom will return immediately.
if (mLines != mOrigLines)
vEndLine = INT_MAX;
}
invalidateLines(index + 1, vEndLine);
if (mOptions.setFlag(SynEditorOption::eoAutoSizeMaxScrollWidth)) {
int L = mLines->expandedStringLength(index);
if (L > mMaxScrollWidth)
setMaxScrollWidth(L);
}
}
void SynEdit::undoAdded()
{
updateModifiedStatus();
// we have to clear the redo information, since adding undo info removes
// the necessary context to undo earlier edit actions
if (! mUndoList->insideRedo() &&
mUndoList->PeekItem() && (mUndoList->PeekItem()->changeReason()!=SynChangeReason::crGroupBreak))
mRedoList->Clear();
if (mUndoList->blockCount() == 0 )
doChange();
}
void SynEdit::redoAdded()
{
updateModifiedStatus();
if (mRedoList->blockCount() == 0 )
doChange();
}
void SynEdit::gutterChanged()
{
if (mGutter.showLineNumbers() && mGutter.autoSize())
mGutter.autoSizeDigitCount(mLines->count());
int nW;
if (mGutter.useFontStyle()) {
QFontMetrics fm=QFontMetrics(mGutter.font());
nW = mGutter.realGutterWidth(fm.averageCharWidth());
} else {
nW = mGutter.realGutterWidth(mCharWidth);
}
if (nW == mGutterWidth)
invalidateGutter();
else
setGutterWidth(nW);
}
void SynEdit::scrollTimerHandler()
{
QPoint iMousePos;
DisplayCoord C;
int X, Y;
iMousePos = QCursor::pos();
iMousePos = mapFromGlobal(iMousePos);
C = pixelsToRowColumn(iMousePos.x(), iMousePos.y());
C.Row = MinMax(C.Row, 1, displayLineCount());
if (mScrollDeltaX != 0) {
setLeftChar(leftChar() + mScrollDeltaX);
X = leftChar();
if (mScrollDeltaX > 0) // scrolling right?
X+=charsInWindow();
C.Column = X;
}
if (mScrollDeltaY != 0) {
if (QApplication::queryKeyboardModifiers().testFlag(Qt::ShiftModifier))
setTopLine(topLine() + mScrollDeltaY * linesInWindow());
else
setTopLine(topLine()) + mScrollDeltaY);
Y = topLine();
if (mScrollDeltaY > 0) // scrolling down?
Y+=linesInWindow() - 1;
C.Row = MinMax(Y, 1, displayLineCount());
}
BufferCoord vCaret = displayToBufferPos(C);
if ((caretX() <> vCaret.Char) || (caretY() != vCaret.Line)) {
// changes to line / column in one go
incPaintLock();
auto action = finally([this]{
decPaintLock();
});
setInternalCaretXY(vCaret);
// if MouseCapture is True we're changing selection. otherwise we're dragging
if (mouseCapture())
setBlockEnd(caretXY());
}
computeScroll(iMousePos.x(), iMousePos.y());
}
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