1 files changed, 145 insertions, 0 deletions
diff --git a/src/linguist/linguist/sourcecodeview.cpp b/src/linguist/linguist/sourcecodeview.cpp
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--- /dev/null
+++ b/src/linguist/linguist/sourcecodeview.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the Qt Linguist of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "sourcecodeview.h"
+
+#include <QtCore/QFile>
+#include <QtCore/QFileInfo>
+#include <QtCore/QTextStream>
+
+#include <QtGui/QTextCharFormat>
+#include <QtGui/QTextBlock>
+#include <QtGui/QTextCursor>
+
+QT_BEGIN_NAMESPACE
+
+SourceCodeView::SourceCodeView(QWidget *parent)
+  : QPlainTextEdit(parent),
+    m_isActive(true),
+    m_lineNumToLoad(0)
+{
+    setReadOnly(true);
+}
+
+void SourceCodeView::setSourceContext(const QString &fileName, const int lineNum)
+{
+    m_fileToLoad.clear();
+    setToolTip(fileName);
+
+    if (fileName.isEmpty()) {
+        clear();
+        m_currentFileName.clear();
+        appendHtml(tr("<i>Source code not available</i>"));
+        return;
+    }
+
+    if (m_isActive) {
+        showSourceCode(fileName, lineNum);
+    } else {
+        m_fileToLoad = fileName;
+        m_lineNumToLoad = lineNum;
+    }
+}
+
+void SourceCodeView::setActivated(bool activated)
+{
+    m_isActive = activated;
+    if (activated && !m_fileToLoad.isEmpty()) {
+        showSourceCode(m_fileToLoad, m_lineNumToLoad);
+        m_fileToLoad.clear();
+    }
+}
+
+void SourceCodeView::showSourceCode(const QString &absFileName, const int lineNum)
+{
+    QString fileText = fileHash.value(absFileName);
+
+    if (fileText.isNull()) { // File not in hash
+        m_currentFileName.clear();
+
+        // Assume fileName is relative to directory
+        QFile file(absFileName);
+
+        if (!file.exists()) {
+            clear();
+            appendHtml(tr("<i>File %1 not available</i>").arg(absFileName));
+            return;
+        }
+        if (!file.open(QIODevice::ReadOnly | QIODevice::Text)) {
+            clear();
+            appendHtml(tr("<i>File %1 not readable</i>").arg(absFileName));
+            return;
+        }
+        fileText = QString::fromLatin1(file.readAll());
+        fileHash.insert(absFileName, fileText);
+    }
+
+
+    if (m_currentFileName != absFileName) {
+        setPlainText(fileText);
+        m_currentFileName = absFileName;
+    }
+
+    QTextCursor cursor = textCursor();
+    cursor.setPosition(document()->findBlockByNumber(lineNum - 1).position());
+    setTextCursor(cursor);
+    centerCursor();
+    cursor.movePosition(QTextCursor::EndOfBlock, QTextCursor::KeepAnchor);
+    cursor.movePosition(QTextCursor::Right, QTextCursor::KeepAnchor);
+
+    QTextEdit::ExtraSelection selectedLine;
+    selectedLine.cursor = cursor;
+
+    // Define custom color for line selection
+    const QColor fg = palette().color(QPalette::Highlight);
+    const QColor bg = palette().color(QPalette::Base);
+    QColor col;
+    const qreal ratio = 0.25;
+    col.setRedF(fg.redF() * ratio + bg.redF() * (1 - ratio));
+    col.setGreenF(fg.greenF() * ratio + bg.greenF() * (1 - ratio));
+    col.setBlueF(fg.blueF() * ratio + bg.blueF() * (1 - ratio));
+
+    selectedLine.format.setBackground(col);
+    selectedLine.format.setProperty(QTextFormat::FullWidthSelection, true);
+    setExtraSelections(QList<QTextEdit::ExtraSelection>() << selectedLine);
+}
+
+QT_END_NAMESPACE