Highlighter has been added

limereport/scripteditor/lrcodeeditor.cpp

@@ -0,0 +1,193 @@
+#include "lrcodeeditor.h"
+
+#include <QAbstractItemView>
+#include <QWidget>
+#include <QCompleter>
+#include <QKeyEvent>
+#include <QScrollBar>
+#include <QPainter>
+#include <QTextBlock>
+#include <QDebug>
+
+#include "lrscripthighlighter.h"
+
+namespace LimeReport{
+
+CodeEditor::CodeEditor(QWidget *parent)
+    : QPlainTextEdit(parent), m_compleater(0)
+{
+    lineNumberArea = new LineNumberArea(this);
+
+    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();
+    (void) new ScriptHighlighter(document());
+}
+
+void CodeEditor::setCompleter(QCompleter *value)
+{
+    if (value) disconnect(value,0,this,0);
+    m_compleater = value;
+    if (!m_compleater) return;
+    m_compleater->setWidget(this);
+    m_compleater->setCompletionMode(QCompleter::PopupCompletion);
+    m_compleater->setCaseSensitivity(Qt::CaseInsensitive);
+    connect(m_compleater,SIGNAL(activated(QString)),this,SLOT(insertCompletion(QString)));
+}
+
+void CodeEditor::lineNumberAreaPaintEvent(QPaintEvent* event)
+{
+    QPainter painter(lineNumberArea);
+    painter.fillRect(event->rect(), QPalette().background().color());
+
+    QTextBlock block = firstVisibleBlock();
+    int blockNumber = block.blockNumber();
+    int top = (int) blockBoundingGeometry(block).translated(contentOffset()).top();
+    int bottom = top + (int) blockBoundingRect(block).height();
+
+    while (block.isValid() && top <= event->rect().bottom()) {
+        if (block.isVisible() && bottom >= event->rect().top()) {
+            QString number = QString::number(blockNumber + 1);
+            painter.setPen(QPalette().text().color());
+            painter.drawText(0, top, lineNumberArea->width(), fontMetrics().height(),
+                             Qt::AlignCenter, number);
+        }
+
+        block = block.next();
+        top = bottom;
+        bottom = top + (int) blockBoundingRect(block).height();
+        ++blockNumber;
+    }
+}
+
+int CodeEditor::lineNumberAreaWidth()
+{
+    int digits = 1;
+    int max = qMax(1, blockCount());
+    while (max >= 10) {
+        max /= 10;
+        ++digits;
+    }
+
+    int space = fontMetrics().width(QLatin1Char('9'))*2 + fontMetrics().width(QLatin1Char('9')) * digits;
+
+    return space;
+}
+
+void CodeEditor::keyPressEvent(QKeyEvent *e)
+{
+    if (m_compleater && m_compleater->popup()->isVisible()) {
+        switch (e->key()) {
+        case Qt::Key_Enter:
+        case Qt::Key_Return:
+        case Qt::Key_Escape:
+        case Qt::Key_Tab:
+        case Qt::Key_Backtab:
+            e->ignore();
+            return;
+        default:
+            break;
+        }
+    }
+
+    bool isShortcut = ((e->modifiers() & Qt::ControlModifier) && e->key() == Qt::Key_Space);
+    if (!m_compleater || !isShortcut) QPlainTextEdit::keyPressEvent(e);
+
+    const bool ctrlOrShift = e->modifiers() & (Qt::ControlModifier | Qt::ShiftModifier);
+    if (!m_compleater || (ctrlOrShift && e->text().isEmpty()))
+        return;
+
+    static QString eow("~!@#$%^&*()_+{}|:\"<>?,./;'[]\\-="); // end of word
+    bool hasModifier = (e->modifiers() != Qt::NoModifier) && !ctrlOrShift;
+
+    QString completionPrefix = textUnderCursor();
+
+    if (!isShortcut && (hasModifier || e->text().isEmpty()|| completionPrefix.length() < 3
+                        || eow.contains(e->text().right(1)))) {
+        m_compleater->popup()->hide();
+        return;
+    }
+
+    if (completionPrefix != m_compleater->completionPrefix()) {
+        m_compleater->setCompletionPrefix(completionPrefix);
+        m_compleater->popup()->setCurrentIndex(m_compleater->completionModel()->index(0, 0));
+    }
+
+    QRect cr = cursorRect();
+    cr.setWidth(m_compleater->popup()->sizeHintForColumn(0)
+                + m_compleater->popup()->verticalScrollBar()->sizeHint().width());
+    m_compleater->complete(cr);
+
+}
+
+void CodeEditor::focusInEvent(QFocusEvent *e)
+{
+    if (m_compleater) m_compleater->setWidget(this);
+    QPlainTextEdit::focusInEvent(e);
+}
+
+void CodeEditor::resizeEvent(QResizeEvent* event)
+{
+    QPlainTextEdit::resizeEvent(event);
+    QRect cr = contentsRect();
+    lineNumberArea->setGeometry(QRect(cr.left(), cr.top(), lineNumberAreaWidth(), cr.height()));
+}
+
+QString CodeEditor::textUnderCursor() const
+{
+    QTextCursor tc = textCursor();
+    tc.select(QTextCursor::WordUnderCursor);
+    return tc.selectedText();
+}
+
+void CodeEditor::insertCompletion(const QString &completion)
+{
+    if (m_compleater->widget() != this)
+             return;
+    QTextCursor tc = textCursor();
+    int extra = completion.length() - m_compleater->completionPrefix().length();
+    tc.movePosition(QTextCursor::Left);
+    tc.movePosition(QTextCursor::EndOfWord);
+    tc.insertText(completion.right(extra));
+    setTextCursor(tc);
+}
+
+void CodeEditor::updateLineNumberAreaWidth(int newBlockCount)
+{
+    setViewportMargins(lineNumberAreaWidth(), 0, 0, 0);
+}
+
+void CodeEditor::highlightCurrentLine()
+{
+    QList<QTextEdit::ExtraSelection> extraSelections;
+
+    if (!isReadOnly()) {
+        QTextEdit::ExtraSelection selection;
+
+        QColor lineColor = QColor(QPalette().background().color()).darker(160);
+
+        selection.format.setBackground(lineColor);
+        selection.format.setProperty(QTextFormat::FullWidthSelection, true);
+        selection.cursor = textCursor();
+        selection.cursor.clearSelection();
+        extraSelections.append(selection);
+    }
+
+    setExtraSelections(extraSelections);
+}
+
+void CodeEditor::updateLineNumberArea(const QRect& rect, int dy)
+{
+    if (dy)
+        lineNumberArea->scroll(0, dy);
+    else
+        lineNumberArea->update(0, rect.y(), lineNumberArea->width(), rect.height());
+
+    if (rect.contains(viewport()->rect()))
+        updateLineNumberAreaWidth(0);
+}
+
+} //namespace LimeReport