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28
29 #include "sourcecodeview.h"
30
31 #include <QtCore/QFile>
32 #include <QtCore/QFileInfo>
33 #include <QtCore/QTextStream>
34
35 #include <QtGui/QTextCharFormat>
36 #include <QtGui/QTextBlock>
37 #include <QtGui/QTextCursor>
38
39 QT_BEGIN_NAMESPACE
40
SourceCodeView(QWidget * parent)41 SourceCodeView::SourceCodeView(QWidget *parent)
42 : QPlainTextEdit(parent),
43 m_isActive(true),
44 m_lineNumToLoad(0)
45 {
46 setReadOnly(true);
47 }
48
setSourceContext(const QString & fileName,const int lineNum)49 void SourceCodeView::setSourceContext(const QString &fileName, const int lineNum)
50 {
51 m_fileToLoad.clear();
52 setToolTip(fileName);
53
54 if (fileName.isEmpty()) {
55 clear();
56 m_currentFileName.clear();
57 appendHtml(tr("<i>Source code not available</i>"));
58 return;
59 }
60
61 if (m_isActive) {
62 showSourceCode(fileName, lineNum);
63 } else {
64 m_fileToLoad = fileName;
65 m_lineNumToLoad = lineNum;
66 }
67 }
68
setActivated(bool activated)69 void SourceCodeView::setActivated(bool activated)
70 {
71 m_isActive = activated;
72 if (activated && !m_fileToLoad.isEmpty()) {
73 showSourceCode(m_fileToLoad, m_lineNumToLoad);
74 m_fileToLoad.clear();
75 }
76 }
77
showSourceCode(const QString & absFileName,const int lineNum)78 void SourceCodeView::showSourceCode(const QString &absFileName, const int lineNum)
79 {
80 QString fileText = fileHash.value(absFileName);
81
82 if (fileText.isNull()) { // File not in hash
83 m_currentFileName.clear();
84
85 // Assume fileName is relative to directory
86 QFile file(absFileName);
87
88 if (!file.exists()) {
89 clear();
90 appendHtml(tr("<i>File %1 not available</i>").arg(absFileName));
91 return;
92 }
93 if (!file.open(QIODevice::ReadOnly | QIODevice::Text)) {
94 clear();
95 appendHtml(tr("<i>File %1 not readable</i>").arg(absFileName));
96 return;
97 }
98 fileText = QString::fromUtf8(file.readAll());
99 fileHash.insert(absFileName, fileText);
100 }
101
102
103 if (m_currentFileName != absFileName) {
104 setPlainText(fileText);
105 m_currentFileName = absFileName;
106 }
107
108 QTextCursor cursor = textCursor();
109 cursor.setPosition(document()->findBlockByNumber(lineNum - 1).position());
110 setTextCursor(cursor);
111 centerCursor();
112 cursor.movePosition(QTextCursor::EndOfBlock, QTextCursor::KeepAnchor);
113 cursor.movePosition(QTextCursor::Right, QTextCursor::KeepAnchor);
114
115 QTextEdit::ExtraSelection selectedLine;
116 selectedLine.cursor = cursor;
117
118 // Define custom color for line selection
119 const QColor fg = palette().color(QPalette::Highlight);
120 const QColor bg = palette().color(QPalette::Base);
121 QColor col;
122 const qreal ratio = 0.25;
123 col.setRedF(fg.redF() * ratio + bg.redF() * (1 - ratio));
124 col.setGreenF(fg.greenF() * ratio + bg.greenF() * (1 - ratio));
125 col.setBlueF(fg.blueF() * ratio + bg.blueF() * (1 - ratio));
126
127 selectedLine.format.setBackground(col);
128 selectedLine.format.setProperty(QTextFormat::FullWidthSelection, true);
129 setExtraSelections(QList<QTextEdit::ExtraSelection>() << selectedLine);
130 }
131
132 QT_END_NAMESPACE
133