QsciScintilla(parent),

showErrorIndicators(true),

findReplaceDialog(new FindReplaceDialog(this))

{

// This class does not set any lexer, that must be done in the child classes.

// Enable UTF8

setUtf8(true);

// Enable brace matching

setBraceMatching(QsciScintilla::SloppyBraceMatch);

// Enable auto indentation

setAutoIndent(true);

// Enable folding

setFolding(QsciScintilla::BoxedTreeFoldStyle);

// Create error indicator

errorIndicatorNumber = indicatorDefine(QsciScintilla::SquiggleIndicator);

setIndicatorForegroundColor(Qt::red, errorIndicatorNumber);

// Set a sensible scroll width, so the scroll bar is avoided in

// most cases.

setScrollWidth(80);

// Scroll width is adjusted to ensure that all of the lines

// currently displayed can be completely scrolled. This mode never

// adjusts the scroll width to be narrower.

setScrollWidthTracking(true);

// Visual flags for when wrap lines is enabled

setWrapVisualFlags(QsciScintilla::WrapFlagByBorder);

// Connect signals

connect(this, &ExtendedScintilla::linesChanged, this, &ExtendedScintilla::updateLineNumberAreaWidth);

// The shortcuts are constrained to the Widget context so they do not conflict with other SqlTextEdit widgets in the Main Window.

QShortcut* shortcutFindReplace = new QShortcut(QKeySequence(tr("Ctrl+H")), this, nullptr, nullptr, Qt::WidgetShortcut);

connect(shortcutFindReplace, &QShortcut::activated, this, &ExtendedScintilla::openFindReplaceDialog);

shortcutFind = new QShortcut(QKeySequence(tr("Ctrl+F")), this, nullptr, nullptr, Qt::WidgetShortcut);

connect(shortcutFind, &QShortcut::activated, this, &ExtendedScintilla::openFindDialog);

#ifdef Q_OS_MACX

// Alt+Backspace on Mac is expected to delete one word to the left,

// instead of undoing (default Scintilla binding).

QsciCommand * command = standardCommands()->find(QsciCommand::DeleteWordLeft);

command->setKey(Qt::AltModifier+Qt::Key_Backspace);

// And Cmd+Backspace should delete from cursor to the beginning of line

command = standardCommands()->find(QsciCommand::DeleteLineLeft);

command->setKey(Qt::ControlModifier+Qt::Key_Backspace);

#endif

QShortcut* shortcutPrint = new QShortcut(QKeySequence(tr("Ctrl+P")), this, nullptr, nullptr, Qt::WidgetShortcut);

connect(shortcutPrint, &QShortcut::activated, this, &ExtendedScintilla::openPrintDialog);

// Prepare for adding the find/replace option to the QScintilla context menu

setContextMenuPolicy(Qt::CustomContextMenu);

connect(this, &ExtendedScintilla::customContextMenuRequested, this, &ExtendedScintilla::showContextMenu);

{

// Calculate number of digits of the current number of lines

int digits = static_cast<int>(std::log10(lines())) + 1;

// Calculate the width of this number if it was all zeros (this is because a 1 might require less space than a 0 and this could

// cause some flickering depending on the font) and set the new margin width.

#if QT_VERSION < QT_VERSION_CHECK(5, 11, 0)

setMarginWidth(0, QFontMetrics(font()).width(QString("0").repeated(digits)) + 5);

#else

setMarginWidth(0, QFontMetrics(font()).horizontalAdvance(QString("0").repeated(digits)) + 5);

#endif

{

QList<QUrl> urls = e->mimeData()->urls();

if(urls.isEmpty())

return QsciScintilla::dropEvent(e);

QString file = urls.first().toLocalFile();

if(!QFile::exists(file))

return;

QFile f(file);

f.open(QIODevice::ReadOnly);

setText(f.readAll());

f.close();

{

lexer->setColor(QColor(Settings::getValue("syntaxhighlighter", settings_name + "_colour").toString()), style);

QFont font(Settings::getValue("editor", "font").toString());

font.setPointSize(Settings::getValue("editor", "fontsize").toInt());

font.setBold(Settings::getValue("syntaxhighlighter", settings_name + "_bold").toBool());

font.setItalic(Settings::getValue("syntaxhighlighter", settings_name + "_italic").toBool());

font.setUnderline(Settings::getValue("syntaxhighlighter", settings_name + "_underline").toBool());

lexer->setFont(font, style);

{

QsciScintilla::setLexer(lexer);

reloadCommonSettings();

{

// Set margins and default text colours according to settings. setLexer seems to reset these colours.

// Use desktop default colors for margins when following desktop

// style, or the colors matching the dark style-sheet, otherwise.

switch (Settings::getValue("General", "appStyle").toInt()) {

case Settings::FollowDesktopStyle :

setMarginsBackgroundColor(QPalette().color(QPalette::Active, QPalette::Window));

setMarginsForegroundColor(QPalette().color(QPalette::Active, QPalette::WindowText));

break;

case Settings::DarkStyle :

setMarginsBackgroundColor(QColor(0x32, 0x41, 0x4B));

setMarginsForegroundColor(QColor(0xEF, 0xF0, 0xF1));

break;

case Settings::LightStyle :

setMarginsBackgroundColor(QColor("#C9CDD0"));

setMarginsForegroundColor(QColor("#000000"));

break;

}

setPaper(Settings::getValue("syntaxhighlighter", "background_colour").toString());

setColor(Settings::getValue("syntaxhighlighter", "foreground_colour").toString());

setMatchedBraceBackgroundColor(Settings::getValue("syntaxhighlighter", "highlight_colour").toString());

setSelectionBackgroundColor(Settings::getValue("syntaxhighlighter", "selected_bg_colour").toString());

setSelectionForegroundColor(Settings::getValue("syntaxhighlighter", "selected_fg_colour").toString());

{

// Set lexer again to reload the updated keywords list

setLexer(lexer());

{

reloadLexerSettings(lexer());

reloadKeywords();

{

QColor foreground (Settings::getValue("syntaxhighlighter", "foreground_colour").toString());

QColor background (Settings::getValue("syntaxhighlighter", "background_colour").toString());

QFont defaultfont(Settings::getValue("editor", "font").toString());

defaultfont.setStyleHint(QFont::TypeWriter);

defaultfont.setPointSize(Settings::getValue("editor", "fontsize").toInt());

// Set syntax highlighting settings

if(lexer)

{

lexer->setFont(defaultfont);

lexer->setDefaultPaper(background);

lexer->setDefaultColor(foreground);

// This sets the base colors for all the styles

lexer->setPaper(background);

lexer->setColor(foreground);

}

// Set font

setFont(defaultfont);

// Show line numbers

setMarginsFont(defaultfont);

setMarginLineNumbers(0, true);

updateLineNumberAreaWidth();

// Highlight current line

setCaretLineVisible(true);

setCaretLineBackgroundColor(QColor(Settings::getValue("syntaxhighlighter", "currentline_colour").toString()));

setCaretForegroundColor(foreground);

// Set tab settings

setTabWidth(Settings::getValue("editor", "tabsize").toInt());

setIndentationsUseTabs(Settings::getValue("editor", "indentation_use_tabs").toBool());

if(lexer)

lexer->refreshProperties();

// Check if error indicators are enabled and clear them if they just got disabled

showErrorIndicators = Settings::getValue("editor", "error_indicators").toBool();

if(!showErrorIndicators)

clearErrorIndicators();

{

// Clear any error indicators from position (0,0) to the last column of the last line

clearIndicatorRange(0, 0, lines(), lineLength(lines()), errorIndicatorNumber);

{

// Set error indicator for the specified range but only if they're enabled

if(showErrorIndicators)

fillIndicatorRange(fromRow, fromIndex, toRow, toIndex, errorIndicatorNumber);

{

// Set error indicator for the position until end of line, but only if they're enabled

if(showErrorIndicators) {

int column = static_cast<int>(SendScintilla(QsciScintillaBase::SCI_GETCOLUMN, position));

int line = static_cast<int>(SendScintilla(QsciScintillaBase::SCI_LINEFROMPOSITION, position));

fillIndicatorRange(line, column, line+1, 0, errorIndicatorNumber);

}

// For finding the previous occurrence, we need to skip the current

// selection, otherwise we'd always found the same occurrence.

if (!forward && hasSelectedText()) {

int lineFrom, indexFrom;

int lineTo, indexTo;

getSelection(&lineFrom, &indexFrom, &lineTo, &indexTo);

setCursorPosition(lineFrom, indexFrom);

}

return findFirst(text, regexp, caseSensitive, words, wrap, forward,

/* line */ -1, /* index */ -1,

/* show */ true, /* posix */ true, /* cxx11 */ true);

{

findReplaceDialog->setExtendedScintilla(this);

findReplaceDialog->showFindReplaceDialog(true);

{

findReplaceDialog->setExtendedScintilla(this);

findReplaceDialog->showFindReplaceDialog(false);

{

// This has to be created here, otherwise the set of enabled options would not update accordingly.

QMenu* editContextMenu = createStandardContextMenu();

editContextMenu->addSeparator();

if (shortcutFind->isEnabled()) {

QAction* findAction = new QAction(QIcon(":/icons/find"), tr("Find..."), this);

findAction->setShortcut(shortcutFind->key());

connect(findAction, &QAction::triggered, this, &ExtendedScintilla::openFindDialog);

editContextMenu->addAction(findAction);

}

QAction* findReplaceAction = new QAction(QIcon(":/icons/text_replace"), tr("Find and Replace..."), this);

findReplaceAction->setShortcut(QKeySequence(tr("Ctrl+H")));

connect(findReplaceAction, &QAction::triggered, this, &ExtendedScintilla::openFindReplaceDialog);

QAction* printAction = new QAction(QIcon(":/icons/print"), tr("Print..."), this);

printAction->setShortcut(QKeySequence(tr("Ctrl+P")));

connect(printAction, &QAction::triggered, this, &ExtendedScintilla::openPrintDialog);

editContextMenu->addAction(findReplaceAction);

editContextMenu->addSeparator();

editContextMenu->addAction(printAction);

editContextMenu->exec(mapToGlobal(pos));

{

QsciPrinter printer;

QPrintPreviewDialog *dialog = new QPrintPreviewDialog(&printer);

connect(dialog, &QPrintPreviewDialog::paintRequested, this, [&](QPrinter *previewPrinter) {

QsciPrinter* sciPrinter = static_cast<QsciPrinter*>(previewPrinter);

sciPrinter->printRange(this);

});

dialog->exec();

delete dialog;

{

QsciScintilla::setReadOnly(ro);

// Disable or enable caret blinking so it is obvious whether the text can be modified or not. Otherwise there isn't any other hint.

SendScintilla(QsciScintillaBase::SCI_SETCARETPERIOD, ro ? 0 : 500);

{

// Reset scroll width, so the scroll bar is readjusted to the new text.

// Otherwise, it grows always bigger.

setScrollWidth(80);

QsciScintilla::setText(text);