tools/triage: updated codeeditor

tools/triage/codeeditor.cpp

@@ -3,19 +3,124 @@
 #include "codeeditor.h"
 
 
+Highlighter::Highlighter(QTextDocument *parent)
+    : QSyntaxHighlighter(parent)
+{
+    HighlightingRule rule;
+
+    keywordFormat.setForeground(Qt::darkBlue);
+    keywordFormat.setFontWeight(QFont::Bold);
+    QStringList keywordPatterns;
+    keywordPatterns << "\\bchar\\b" << "\\bclass\\b" << "\\bconst\\b"
+                    << "\\bdouble\\b" << "\\benum\\b" << "\\bexplicit\\b"
+                    << "\\bfriend\\b" << "\\binline\\b" << "\\bint\\b"
+                    << "\\blong\\b" << "\\bnamespace\\b" << "\\boperator\\b"
+                    << "\\bprivate\\b" << "\\bprotected\\b" << "\\bpublic\\b"
+                    << "\\bshort\\b" << "\\bsignals\\b" << "\\bsigned\\b"
+                    << "\\bslots\\b" << "\\bstatic\\b" << "\\bstruct\\b"
+                    << "\\btemplate\\b" << "\\btypedef\\b" << "\\btypename\\b"
+                    << "\\bunion\\b" << "\\bunsigned\\b" << "\\bvirtual\\b"
+                    << "\\bvoid\\b" << "\\bvolatile\\b" << "\\bbool\\b";
+    foreach (const QString &pattern, keywordPatterns) {
+        rule.pattern = QRegularExpression(pattern);
+        rule.format = keywordFormat;
+        highlightingRules.append(rule);
+    }
+
+    classFormat.setFontWeight(QFont::Bold);
+    classFormat.setForeground(Qt::darkMagenta);
+    rule.pattern = QRegularExpression("\\bQ[A-Za-z]+\\b");
+    rule.format = classFormat;
+    highlightingRules.append(rule);
+
+    quotationFormat.setForeground(Qt::darkGreen);
+    rule.pattern = QRegularExpression("\".*\"");
+    rule.format = quotationFormat;
+    highlightingRules.append(rule);
+
+    functionFormat.setFontItalic(true);
+    functionFormat.setForeground(Qt::blue);
+    rule.pattern = QRegularExpression("\\b[A-Za-z0-9_]+(?=\\()");
+    rule.format = functionFormat;
+    highlightingRules.append(rule);
+
+    singleLineCommentFormat.setForeground(Qt::gray);
+    rule.pattern = QRegularExpression("//[^\n]*");
+    rule.format = singleLineCommentFormat;
+    highlightingRules.append(rule);
+
+    multiLineCommentFormat.setForeground(Qt::gray);
+
+    commentStartExpression = QRegularExpression("/\\*");
+    commentEndExpression = QRegularExpression("\\*/");
+}
+
+void Highlighter::highlightBlock(const QString &text)
+{
+    foreach (const HighlightingRule &rule, highlightingRules) {
+        QRegularExpressionMatchIterator matchIterator = rule.pattern.globalMatch(text);
+        while (matchIterator.hasNext()) {
+            QRegularExpressionMatch match = matchIterator.next();
+            setFormat(match.capturedStart(), match.capturedLength(), rule.format);
+        }
+    }
+
+    setCurrentBlockState(0);
+
+    int startIndex = 0;
+    if (previousBlockState() != 1)
+        startIndex = text.indexOf(commentStartExpression);
+
+    while (startIndex >= 0) {
+        QRegularExpressionMatch match = commentEndExpression.match(text, startIndex);
+        int endIndex = match.capturedStart();
+        int commentLength = 0;
+        if (endIndex == -1) {
+            setCurrentBlockState(1);
+            commentLength = text.length() - startIndex;
+        } else {
+            commentLength = endIndex - startIndex
+                            + match.capturedLength();
+        }
+        setFormat(startIndex, commentLength, multiLineCommentFormat);
+        startIndex = text.indexOf(commentStartExpression, startIndex + commentLength);
+    }
+}
+
+
 CodeEditor::CodeEditor(QWidget *parent) : QPlainTextEdit(parent)
 {
     lineNumberArea = new LineNumberArea(this);
+    highlighter = new Highlighter(this->document());
+    mErrorPosition = -1;
 
     connect(this, SIGNAL(blockCountChanged(int)), this, SLOT(updateLineNumberAreaWidth(int)));
     connect(this, SIGNAL(updateRequest(QRect,int)), this, SLOT(updateLineNumberArea(QRect,int)));
     connect(this, SIGNAL(cursorPositionChanged()), this, SLOT(highlightCurrentLine()));
 
     updateLineNumberAreaWidth(0);
-    highlightCurrentLine();
 }
 
+static int getPos(const QString &fileData, int lineNumber)
+{
+    for (int pos = 0, line = 1; pos < fileData.size(); ++pos) {
+        if (fileData[pos] != '\n')
+            continue;
+        ++line;
+        if (line == lineNumber)
+            return pos + 1;
+    }
+    return fileData.size();
+}
 
+void CodeEditor::setErrorLine(int errorLine)
+{
+    mErrorPosition = getPos(toPlainText(), errorLine);
+    QTextCursor tc = textCursor();
+    tc.setPosition(mErrorPosition);
+    setTextCursor(tc);
+    centerCursor();
+}
 
 int CodeEditor::lineNumberAreaWidth()
 {
@@ -27,19 +132,14 @@ int CodeEditor::lineNumberAreaWidth()
     }
 
     int space = 3 + fontMetrics().width(QLatin1Char('9')) * digits;
-
     return space;
 }
 
-
-
 void CodeEditor::updateLineNumberAreaWidth(int /* newBlockCount */)
 {
     setViewportMargins(lineNumberAreaWidth(), 0, 0, 0);
 }
 
-
-
 void CodeEditor::updateLineNumberArea(const QRect &rect, int dy)
 {
     if (dy)
@@ -51,44 +151,38 @@ void CodeEditor::updateLineNumberArea(const QRect &rect, int dy)
         updateLineNumberAreaWidth(0);
 }
 
-
-
-void CodeEditor::resizeEvent(QResizeEvent *e)
+void CodeEditor::resizeEvent(QResizeEvent *event)
 {
-    QPlainTextEdit::resizeEvent(e);
-
+    QPlainTextEdit::resizeEvent(event);
     QRect cr = contentsRect();
     lineNumberArea->setGeometry(QRect(cr.left(), cr.top(), lineNumberAreaWidth(), cr.height()));
 }
 
-
-
 void CodeEditor::highlightCurrentLine()
 {
+    QTextCursor tc = textCursor();
+    tc.setPosition(mErrorPosition);
+    setTextCursor(tc);
+
     QList<QTextEdit::ExtraSelection> extraSelections;
 
-    if (!isReadOnly()) {
-        QTextEdit::ExtraSelection selection;
+    QTextEdit::ExtraSelection selection;
 
-        QColor lineColor = QColor(Qt::yellow).lighter(160);
+    QColor lineColor = QColor(255,220,220);
 
-        selection.format.setBackground(lineColor);
-        selection.format.setProperty(QTextFormat::FullWidthSelection, true);
-        selection.cursor = textCursor();
-        selection.cursor.clearSelection();
-        extraSelections.append(selection);
-    }
+    selection.format.setBackground(lineColor);
+    selection.format.setProperty(QTextFormat::FullWidthSelection, true);
+    selection.cursor = textCursor();
+    selection.cursor.clearSelection();
+    extraSelections.append(selection);
 
     setExtraSelections(extraSelections);
 }
 
-
-
 void CodeEditor::lineNumberAreaPaintEvent(QPaintEvent *event)
 {
     QPainter painter(lineNumberArea);
-    painter.fillRect(event->rect(), Qt::lightGray);
-
+    painter.fillRect(event->rect(), QColor(240,240,240));
 
     QTextBlock block = firstVisibleBlock();
     int blockNumber = block.blockNumber();

tools/triage/codeeditor.h

@@ -1,8 +1,10 @@
 #ifndef CODEEDITOR_H
 #define CODEEDITOR_H
 
+#include <QSyntaxHighlighter>
 #include <QPlainTextEdit>
 #include <QObject>
+#include <QRegularExpression>
 
 class QPaintEvent;
 class QResizeEvent;
@@ -12,15 +14,44 @@ class QWidget;
 class LineNumberArea;
 
 
+class Highlighter : public QSyntaxHighlighter {
+    Q_OBJECT
+
+public:
+    explicit Highlighter(QTextDocument *parent);
+
+protected:
+    void highlightBlock(const QString &text) override;
+
+private:
+    struct HighlightingRule {
+        QRegularExpression pattern;
+        QTextCharFormat format;
+    };
+    QVector<HighlightingRule> highlightingRules;
+
+    QRegularExpression commentStartExpression;
+    QRegularExpression commentEndExpression;
+
+    QTextCharFormat keywordFormat;
+    QTextCharFormat classFormat;
+    QTextCharFormat singleLineCommentFormat;
+    QTextCharFormat multiLineCommentFormat;
+    QTextCharFormat quotationFormat;
+    QTextCharFormat functionFormat;
+};
+
 class CodeEditor : public QPlainTextEdit {
     Q_OBJECT
 
 public:
-    explicit CodeEditor(QWidget *parent = 0);
+    explicit CodeEditor(QWidget *parent);
 
     void lineNumberAreaPaintEvent(QPaintEvent *event);
     int lineNumberAreaWidth();
 
+    void setErrorLine(int errorLine);
+
 protected:
     void resizeEvent(QResizeEvent *event) override;
 
@@ -31,6 +62,8 @@ private slots:
 
 private:
     QWidget *lineNumberArea;
+    Highlighter *highlighter;
+    int mErrorPosition;
 };