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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
#include "diffandloghighlighter.h"
#include <texteditor/textdocumentlayout.h>
#include <utils/qtcassert.h>
#include <QDebug>
#include <QRegularExpression>
/*!
\class VcsBase::DiffAndLogHighlighter
\brief The DiffAndLogHighlighter class provides a highlighter for diffs and log editors.
Diff is parametrizable by the file indicator, which is for example '^====' in case of p4:
\code
==== //depot/research/main/qdynamicmainwindow3/qdynamicdockwidgetlayout_p.h#34 (text) ====
\endcode
Or '--- a/|'+++ b/' in case of git:
\code
diff --git a/src/plugins/plugins.pro b/src/plugins/plugins.pro
index 9401ee7..ef35c3b 100644
--- a/src/plugins/plugins.pro
+++ b/src/plugins/plugins.pro
@@ -10,6 +10,7 @@ SUBDIRS = plugin_coreplugin
\endcode
Log is parametrizable by change indicator. For example '^commit ([0-9a-f]{8})[0-9a-f]{32}'
in Git:
\code
commit a3398841a24b24c73b47759c4bffdc8b78a34936 (HEAD, master)
\code
Also highlights trailing blanks.
*/
static const int BASE_LEVEL = 0;
static const int FILE_LEVEL = 1;
static const int LOCATION_LEVEL = 2;
namespace VcsBase {
namespace Internal {
enum FoldingState {
StartOfFile,
Header,
File,
Location
};
} // namespace Internal;
static inline QTextCharFormat invertedColorFormat(const QTextCharFormat &in)
{
QTextCharFormat rc = in;
rc.setForeground(in.background());
rc.setBackground(in.foreground());
return rc;
}
// --- DiffAndLogHighlighterPrivate
class DiffAndLogHighlighterPrivate
{
public:
DiffAndLogHighlighterPrivate(DiffAndLogHighlighter *q_,
const QRegularExpression &filePattern,
const QRegularExpression &changePattern) :
q(q_),
m_filePattern(filePattern),
m_changePattern(changePattern),
m_locationIndicator(QLatin1String("@@")),
m_diffInIndicator(QLatin1Char('+')),
m_diffOutIndicator(QLatin1Char('-')),
m_foldingState(Internal::StartOfFile)
{
QTC_CHECK(filePattern.isValid());
}
TextEditor::TextStyle analyzeLine(const QString &block) const;
void updateOtherFormats();
DiffAndLogHighlighter *const q;
const QRegularExpression m_filePattern;
const QRegularExpression m_changePattern;
const QString m_locationIndicator;
const QChar m_diffInIndicator;
const QChar m_diffOutIndicator;
QTextCharFormat m_addedTrailingWhiteSpaceFormat;
Internal::FoldingState m_foldingState;
bool m_enabled = true;
};
TextEditor::TextStyle DiffAndLogHighlighterPrivate::analyzeLine(const QString &text) const
{
// Do not match on git "--- a/" as a deleted line, check
// file first
if (m_filePattern.match(text).capturedStart() == 0)
return TextEditor::C_DIFF_FILE;
if (m_changePattern.match(text).capturedStart() == 0)
return TextEditor::C_LOG_CHANGE_LINE;
if (text.startsWith(m_diffInIndicator))
return TextEditor::C_ADDED_LINE;
if (text.startsWith(m_diffOutIndicator))
return TextEditor::C_REMOVED_LINE;
if (text.startsWith(m_locationIndicator))
return TextEditor::C_DIFF_LOCATION;
return TextEditor::C_TEXT;
}
void DiffAndLogHighlighterPrivate::updateOtherFormats()
{
m_addedTrailingWhiteSpaceFormat =
invertedColorFormat(q->formatForCategory(TextEditor::C_ADDED_LINE));
}
// --- DiffAndLogHighlighter
DiffAndLogHighlighter::DiffAndLogHighlighter(const QRegularExpression &filePattern,
const QRegularExpression &changePattern) :
TextEditor::SyntaxHighlighter(static_cast<QTextDocument *>(nullptr)),
d(new DiffAndLogHighlighterPrivate(this, filePattern, changePattern))
{
setDefaultTextFormatCategories();
d->updateOtherFormats();
}
DiffAndLogHighlighter::~DiffAndLogHighlighter()
{
delete 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;
}
/*
* This sets the folding indent:
* 0 for the first line of the diff header.
* 1 for all the following lines of the diff header and all @@ lines.
* 2 for everything else
*/
void DiffAndLogHighlighter::highlightBlock(const QString &text)
{
if (text.isEmpty())
return;
const int length = text.length();
const TextEditor::TextStyle format = d->analyzeLine(text);
if (d->m_enabled) {
if (format == TextEditor::C_ADDED_LINE) {
// Mark trailing whitespace.
const int trimmedLen = trimmedLength(text);
setFormatWithSpaces(text, 0, trimmedLen, formatForCategory(format));
if (trimmedLen != length)
setFormat(trimmedLen, length - trimmedLen, d->m_addedTrailingWhiteSpaceFormat);
} else if (format != TextEditor::C_TEXT) {
setFormatWithSpaces(text, 0, length, formatForCategory(format));
} else {
formatSpaces(text);
}
}
// codefolding:
TextEditor::TextBlockUserData *data =
TextEditor::TextDocumentLayout::userData(currentBlock());
QTC_ASSERT(data, return; );
if (!TextEditor::TextDocumentLayout::textUserData(currentBlock().previous()))
d->m_foldingState = Internal::StartOfFile;
switch (d->m_foldingState) {
case Internal::StartOfFile:
case Internal::Header:
if (format == TextEditor::C_DIFF_FILE) {
d->m_foldingState = Internal::File;
TextEditor::TextDocumentLayout::setFoldingIndent(currentBlock(), BASE_LEVEL);
} else if (format == TextEditor::C_DIFF_LOCATION) {
d->m_foldingState = Internal::Location;
TextEditor::TextDocumentLayout::setFoldingIndent(currentBlock(), FILE_LEVEL);
} else {
d->m_foldingState = Internal::Header;
TextEditor::TextDocumentLayout::setFoldingIndent(currentBlock(), BASE_LEVEL);
}
break;
case Internal::File:
if (format == TextEditor::C_DIFF_FILE) {
TextEditor::TextDocumentLayout::setFoldingIndent(currentBlock(), FILE_LEVEL);
} else if (format == TextEditor::C_DIFF_LOCATION) {
d->m_foldingState = Internal::Location;
TextEditor::TextDocumentLayout::setFoldingIndent(currentBlock(), FILE_LEVEL);
} else {
TextEditor::TextDocumentLayout::setFoldingIndent(currentBlock(), FILE_LEVEL);
}
break;
case Internal::Location:
if (format == TextEditor::C_DIFF_FILE) {
d->m_foldingState = Internal::File;
TextEditor::TextDocumentLayout::setFoldingIndent(currentBlock(), BASE_LEVEL);
} else if (format == TextEditor::C_DIFF_LOCATION) {
TextEditor::TextDocumentLayout::setFoldingIndent(currentBlock(), FILE_LEVEL);
} else {
TextEditor::TextDocumentLayout::setFoldingIndent(currentBlock(), LOCATION_LEVEL);
}
break;
}
}
void DiffAndLogHighlighter::setFontSettings(const TextEditor::FontSettings &fontSettings)
{
SyntaxHighlighter::setFontSettings(fontSettings);
d->updateOtherFormats();
}
void DiffAndLogHighlighter::setEnabled(bool enabled)
{
d->m_enabled = enabled;
}
} // namespace VcsBase
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