Include C language syntax highlighter for alternative sources editing.

Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>

4 files changed, 264 insertions, 0 deletions

diff --git a/qtmips_gui/highlighterc.cpp b/qtmips_gui/highlighterc.cpp
new file mode 100644
index 0000000..abac62f
--- /dev/null
+++ b/qtmips_gui/highlighterc.cpp
@@ -0,0 +1,160 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** BSD License Usage
+** Alternatively, you may use this file under the terms of the BSD license
+** as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of The Qt Company Ltd nor the names of its
+**     contributors may be used to endorse or promote products derived
+**     from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "highlighterc.h"
+
+//! [0]
+HighlighterC::HighlighterC(QTextDocument *parent)
+    : QSyntaxHighlighter(parent)
+{
+    HighlightingRule rule;
+
+    keywordFormat.setForeground(Qt::darkBlue);
+    keywordFormat.setFontWeight(QFont::Bold);
+    const QString keywordPatterns[] = {
+        QStringLiteral("\\bchar\\b"), QStringLiteral("\\bclass\\b"), QStringLiteral("\\bconst\\b"),
+        QStringLiteral("\\bdouble\\b"), QStringLiteral("\\benum\\b"), QStringLiteral("\\bexplicit\\b"),
+        QStringLiteral("\\bfriend\\b"), QStringLiteral("\\binline\\b"), QStringLiteral("\\bint\\b"),
+        QStringLiteral("\\blong\\b"), QStringLiteral("\\bnamespace\\b"), QStringLiteral("\\boperator\\b"),
+        QStringLiteral("\\bprivate\\b"), QStringLiteral("\\bprotected\\b"), QStringLiteral("\\bpublic\\b"),
+        QStringLiteral("\\bshort\\b"), QStringLiteral("\\bsignals\\b"), QStringLiteral("\\bsigned\\b"),
+        QStringLiteral("\\bslots\\b"), QStringLiteral("\\bstatic\\b"), QStringLiteral("\\bstruct\\b"),
+        QStringLiteral("\\btemplate\\b"), QStringLiteral("\\btypedef\\b"), QStringLiteral("\\btypename\\b"),
+        QStringLiteral("\\bunion\\b"), QStringLiteral("\\bunsigned\\b"), QStringLiteral("\\bvirtual\\b"),
+        QStringLiteral("\\bvoid\\b"), QStringLiteral("\\bvolatile\\b"), QStringLiteral("\\bbool\\b")
+    };
+    for (const QString &pattern : keywordPatterns) {
+        rule.pattern = QRegularExpression(pattern);
+        rule.format = keywordFormat;
+        highlightingRules.append(rule);
+//! [0] //! [1]
+    }
+//! [1]
+
+//! [2]
+    classFormat.setFontWeight(QFont::Bold);
+    classFormat.setForeground(Qt::darkMagenta);
+    rule.pattern = QRegularExpression(QStringLiteral("\\bQ[A-Za-z]+\\b"));
+    rule.format = classFormat;
+    highlightingRules.append(rule);
+//! [2]
+
+//! [3]
+    singleLineCommentFormat.setForeground(Qt::red);
+    rule.pattern = QRegularExpression(QStringLiteral("//[^\n]*"));
+    rule.format = singleLineCommentFormat;
+    highlightingRules.append(rule);
+
+    multiLineCommentFormat.setForeground(Qt::red);
+//! [3]
+
+//! [4]
+    quotationFormat.setForeground(Qt::darkGreen);
+    rule.pattern = QRegularExpression(QStringLiteral("\".*\""));
+    rule.format = quotationFormat;
+    highlightingRules.append(rule);
+//! [4]
+
+//! [5]
+    functionFormat.setFontItalic(true);
+    functionFormat.setForeground(Qt::blue);
+    rule.pattern = QRegularExpression(QStringLiteral("\\b[A-Za-z0-9_]+(?=\\()"));
+    rule.format = functionFormat;
+    highlightingRules.append(rule);
+//! [5]
+
+//! [6]
+    commentStartExpression = QRegularExpression(QStringLiteral("/\\*"));
+    commentEndExpression = QRegularExpression(QStringLiteral("\\*/"));
+}
+//! [6]
+
+//! [7]
+void HighlighterC::highlightBlock(const QString &text)
+{
+#if QT_VERSION < QT_VERSION_CHECK(5, 7, 0)
+    foreach(const HighlightingRule &rule, highlightingRules)
+#else
+    for (const HighlightingRule &rule : qAsConst(highlightingRules))
+#endif
+    {
+        QRegularExpressionMatchIterator matchIterator = rule.pattern.globalMatch(text);
+        while (matchIterator.hasNext()) {
+            QRegularExpressionMatch match = matchIterator.next();
+            setFormat(match.capturedStart(), match.capturedLength(), rule.format);
+        }
+    }
+//! [7] //! [8]
+    setCurrentBlockState(0);
+//! [8]
+
+//! [9]
+    int startIndex = 0;
+    if (previousBlockState() != 1)
+        startIndex = text.indexOf(commentStartExpression);
+
+//! [9] //! [10]
+    while (startIndex >= 0) {
+//! [10] //! [11]
+        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);
+    }
+}
+//! [11]
diff --git a/qtmips_gui/highlighterc.h b/qtmips_gui/highlighterc.h
new file mode 100644
index 0000000..933c95d
--- /dev/null
+++ b/qtmips_gui/highlighterc.h
@@ -0,0 +1,93 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** BSD License Usage
+** Alternatively, you may use this file under the terms of the BSD license
+** as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of The Qt Company Ltd nor the names of its
+**     contributors may be used to endorse or promote products derived
+**     from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef HIGHLIGHTERC_H
+#define HIGHLIGHTERC_H
+
+#include <QSyntaxHighlighter>
+#include <QTextCharFormat>
+#include <QRegularExpression>
+
+QT_BEGIN_NAMESPACE
+class QTextDocument;
+QT_END_NAMESPACE
+
+//! [0]
+class HighlighterC : public QSyntaxHighlighter
+{
+    Q_OBJECT
+
+public:
+    HighlighterC(QTextDocument *parent = 0);
+
+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;
+};
+//! [0]
+
+#endif // HIGHLIGHTERC_H
diff --git a/qtmips_gui/qtmips_gui.pro b/qtmips_gui/qtmips_gui.pro
index 1be139e..6cf1c06 100644
--- a/qtmips_gui/qtmips_gui.pro
+++ b/qtmips_gui/qtmips_gui.pro
@@ -77,6 +77,7 @@ SOURCES += \
     coreview/minimux.cpp \
     srceditor.cpp \
     highlighterasm.cpp \
+    highlighterc.cpp \
     messagesdock.cpp \
     messagesmodel.cpp \
     messagesview.cpp
@@ -125,6 +126,7 @@ HEADERS += \
     coreview/minimux.h \
     srceditor.h \
     highlighterasm.h \
+    highlighterc.h \
     messagesdock.h \
     messagesmodel.h \
     messagesview.h
diff --git a/qtmips_gui/srceditor.cpp b/qtmips_gui/srceditor.cpp
index e7502ac..8b0000d 100644
--- a/qtmips_gui/srceditor.cpp
+++ b/qtmips_gui/srceditor.cpp
@@ -41,6 +41,7 @@
 
 #include "srceditor.h"
 #include "highlighterasm.h"
+#include "highlighterc.h"
 
 void SrcEditor::setup_common() {
     QFont font;
@@ -76,6 +77,14 @@ void SrcEditor::setFileName(QString filename) {
     QFileInfo fi(filename);
     fname = filename;
     tname = fi.fileName();
+    delete highlighter;
+    highlighter = nullptr;
+    if ((fi.suffix() == "c") || (fi.suffix() == "C") ||
+        (fi.suffix() == "cpp") || ((fi.suffix() == "c++"))) {
+        highlighter = new HighlighterC(document());
+    } else {
+        highlighter = new HighlighterAsm(document());
+    }
 }