feat: Make linting color block in the line number are narrower

Now the linting color block in the line number area is of 7px width.

This also changes the name of QLineNumberArea::squiggle to
QLineNumberArea::lint, QLineNumberArea::clearSquiggles to
QLineNumberArea::clearLint.

Author: ouuan

include/internal/QLineNumberArea.hpp

@@ -43,9 +43,9 @@ class QLineNumberArea : public QWidget
      */
     QSyntaxStyle *syntaxStyle() const;
 
-    void squiggle(QCodeEditor::SeverityLevel level, int from, int to);
+    void lint(QCodeEditor::SeverityLevel level, int from, int to);
 
-    void clearSquiggles();
+    void clearLint();
 
   protected:
     void paintEvent(QPaintEvent *event) override;

src/internal/QCodeEditor.cpp

@@ -955,7 +955,7 @@ void QCodeEditor::squiggle(SeverityLevel level, QPair<int, int> start, QPair<int
 
     extra_squiggles.push_back({cursor, newcharfmt});
 
-    m_lineNumberArea->squiggle(level, start.first, stop.first);
+    m_lineNumberArea->lint(level, start.first, stop.first);
 
     setExtraSelections(extra1 + extra2 + extra_squiggles);
 }
@@ -968,7 +968,7 @@ void QCodeEditor::clearSquiggle()
     m_squiggler.clear();
     extra_squiggles.clear();
 
-    m_lineNumberArea->clearSquiggles();
+    m_lineNumberArea->clearLint();
 
     setExtraSelections(extra1 + extra2);
 }

src/internal/QLineNumberArea.cpp

@@ -23,20 +23,17 @@ QSize QLineNumberArea::sizeHint() const
         return QWidget::sizeHint();
     }
 
-    // Calculating width
-    int digits = 1;
-    int max = qMax(1, m_codeEditParent->document()->blockCount());
-    while (max >= 10)
-    {
-        max /= 10;
-        ++digits;
-    }
+    int space = 0;
+    int lineCount = m_codeEditParent->document()->blockCount();
 
+    for (int i = 0; i <= lineCount; ++i)
+    {
 #if QT_VERSION >= 0x050B00
-    int space = 13 + m_codeEditParent->fontMetrics().horizontalAdvance(QLatin1Char('9')) * digits;
+        space = 15 + m_codeEditParent->fontMetrics().horizontalAdvance(QString::number(i));
 #else
-    int space = 13 + m_codeEditParent->fontMetrics().width(QLatin1Char('9')) * digits;
+        space = 15 + m_codeEditParent->fontMetrics().width(QLatin1Char(QString::number(i)));
 #endif
+    }
 
     return {space, 0};
 }
@@ -51,7 +48,7 @@ QSyntaxStyle *QLineNumberArea::syntaxStyle() const
     return m_syntaxStyle;
 }
 
-void QLineNumberArea::squiggle(QCodeEditor::SeverityLevel level, int from, int to)
+void QLineNumberArea::lint(QCodeEditor::SeverityLevel level, int from, int to)
 {
     for (int i = from - 1; i < to; ++i)
     {
@@ -60,7 +57,7 @@ void QLineNumberArea::squiggle(QCodeEditor::SeverityLevel level, int from, int t
     update();
 }
 
-void QLineNumberArea::clearSquiggles()
+void QLineNumberArea::clearLint()
 {
     m_squiggles.clear();
     update();
@@ -114,7 +111,7 @@ void QLineNumberArea::paintEvent(QPaintEvent *event)
                     Q_UNREACHABLE();
                     break;
                 }
-                painter.fillRect(0, top, sizeHint().width(), m_codeEditParent->fontMetrics().height(), squiggleColor);
+                painter.fillRect(0, top, 7, m_codeEditParent->fontMetrics().height(), squiggleColor);
             }
 
             auto isCurrentLine = m_codeEditParent->textCursor().blockNumber() == blockNumber;