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/* -*- C++ -*-

* Cppcheck - A tool for static C/C++ code analysis

* This program is free software: you can redistribute it and/or modify

* it under the terms of the GNU General Public License as published by

* the Free Software Foundation, either version 3 of the License, or

* (at your option) any later version.

* This program is distributed in the hope that it will be useful,

* but WITHOUT ANY WARRANTY; without even the implied warranty of

* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

* GNU General Public License for more details.

* You should have received a copy of the GNU General Public License

* along with this program. If not, see <http://www.gnu.org/licenses/>.

#ifndef CODEEDITOR_H

#define CODEEDITOR_H

#include <cstdint>

#include <QList>

#include <QObject>

#include <QPlainTextEdit>

#include <QRegularExpression>

#include <QSize>

#include <QString>

#include <QStringList>

#include <QSyntaxHighlighter>

#include <QTextCharFormat>

#include <QWidget>

class CodeEditorStyle;

class QPaintEvent;

class QRect;

class QTextDocument;

class Highlighter : public QSyntaxHighlighter {

Q_OBJECT

public:

explicit Highlighter(QTextDocument *parent,

CodeEditorStyle *widgetStyle);

void setSymbols(const QStringList &symbols);

void setStyle(const CodeEditorStyle &newStyle);

protected:

void highlightBlock(const QString &text) override;

private:

enum RuleRole : std::uint8_t {

Keyword = 1,

Class = 2,

Comment = 3,

Quote = 4,

Symbol = 5

};

struct HighlightingRule {

QRegularExpression pattern;

QTextCharFormat format;

RuleRole ruleRole;

};

void applyFormat(HighlightingRule &rule) const;

QList<HighlightingRule> mHighlightingRules;

QList<HighlightingRule> mHighlightingRulesWithSymbols;

QRegularExpression mCommentStartExpression;

QRegularExpression mCommentEndExpression;

QTextCharFormat mKeywordFormat;

QTextCharFormat mClassFormat;

QTextCharFormat mSingleLineCommentFormat;

QTextCharFormat mMultiLineCommentFormat;

QTextCharFormat mQuotationFormat;

QTextCharFormat mSymbolFormat;

CodeEditorStyle *mWidgetStyle;

};

class CodeEditor : public QPlainTextEdit {

Q_OBJECT

public:

explicit CodeEditor(QWidget *parent);

CodeEditor(const CodeEditor &) = delete;

CodeEditor &operator=(const CodeEditor &) = delete;

~CodeEditor() override;

void lineNumberAreaPaintEvent(const QPaintEvent *event);

int lineNumberAreaWidth();

void setStyle(const CodeEditorStyle& newStyle);

/**

* Set source code to show, goto error line and highlight that line.

* \param code The source code.

* \param errorLine line number

* \param symbols the related symbols, these are marked

void setError(const QString &code, int errorLine, const QStringList &symbols);

/**

* Goto another error in existing source file

* \param errorLine line number

* \param symbols the related symbols, these are marked

void setError(int errorLine, const QStringList &symbols);

void setFileName(const QString &fileName) {

mFileName = fileName;

}

const QString& getFileName() const {

return mFileName;

}

// NOLINTNEXTLINE(bugprone-derived-method-shadowing-base-method) - TODO: fix this

void clear() {

mFileName.clear();

setPlainText(QString());

}

protected:

void resizeEvent(QResizeEvent *event) override;

private slots:

void updateLineNumberAreaWidth(int /*newBlockCount*/);

void highlightErrorLine();

void updateLineNumberArea(const QRect& rect, int dy);

private:

QString generateStyleString();

private:

QWidget *mLineNumberArea;

Highlighter *mHighlighter;

CodeEditorStyle *mWidgetStyle;

int mErrorPosition;

QString mFileName;

};

class LineNumberArea : public QWidget {

public:

explicit LineNumberArea(CodeEditor *editor) : QWidget(editor) {

mCodeEditor = editor;

}

QSize sizeHint() const override {

return QSize(mCodeEditor->lineNumberAreaWidth(), 0);

}

protected:

void paintEvent(QPaintEvent *event) override {

mCodeEditor->lineNumberAreaPaintEvent(event);

}

private:

CodeEditor *mCodeEditor;

};

#endif // CODEEDITOR_H