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Diff-Highlighter: Mark trailing whitespace in added lines.

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... using inverted colors.
This commit is contained in:
Friedemann Kleint
2009-12-04 14:23:34 +01:00
parent c996238d70
commit accc2c6926
1 changed files with 37 additions and 2 deletions
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39
src/plugins/vcsbase/diffhighlighter.cpp
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@@ -34,6 +34,7 @@
#include <QtCore/QDebug>
#include <QtCore/QtAlgorithms>
#include <QtCore/QRegExp>
#include <QtGui/QBrush>
namespace VCSBase {
@@ -57,6 +58,7 @@ struct DiffHighlighterPrivate {
const QChar m_diffInIndicator;
const QChar m_diffOutIndicator;
QTextCharFormat m_formats[NumDiffFormats];
QTextCharFormat m_addedTrailingWhiteSpaceFormat;
};
DiffHighlighterPrivate::DiffHighlighterPrivate(const QRegExp &filePattern) :
@@ -96,20 +98,53 @@ DiffHighlighter::~DiffHighlighter()
delete m_d;
}
// Check trailing spaces
static inline int trimmedLength(const QString &in)
{
for (int pos = in.length() - 1; pos >= 0; pos--)
if (!in.at(pos).isSpace())
return pos + 1;
return 0;
}
void DiffHighlighter::highlightBlock(const QString &text)
{
if (text.isEmpty())
return;
const int length = text.length();
const DiffFormats format = m_d->analyzeLine(text);
if (format != DiffTextFormat)
setFormat(0, text.length(), m_d->m_formats[format]);
switch (format) {
case DiffTextFormat:
break;
case DiffInFormat: {
// Mark trailing whitespace.
const int trimmedLen = trimmedLength(text);
setFormat(0, trimmedLen, m_d->m_formats[format]);
if (trimmedLen != length)
setFormat(trimmedLen, length - trimmedLen, m_d->m_addedTrailingWhiteSpaceFormat);
}
break;
default:
setFormat(0, length, m_d->m_formats[format]);
break;
}
}
static inline QTextCharFormat invertedColorFormat(const QTextCharFormat &in)
{
QTextCharFormat rc = in;
rc.setForeground(in.background());
rc.setBackground(in.foreground());
return rc;
}
void DiffHighlighter::setFormats(const QVector<QTextCharFormat> &s)
{
if (s.size() == NumDiffFormats) {
qCopy(s.constBegin(), s.constEnd(), m_d->m_formats);
// Display trailing blanks with colors swapped
m_d->m_addedTrailingWhiteSpaceFormat = invertedColorFormat(m_d->m_formats[DiffInFormat]);
} else {
qWarning("%s: insufficient setting size: %d", Q_FUNC_INFO, s.size());
}