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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 "cppqtstyleindenter.h"
#include "cppcodeformatter.h"
#include "cpptoolssettings.h"
#include "cppcodestylepreferences.h"
#include <QChar>
#include <QTextDocument>
#include <QTextBlock>
#include <QTextCursor>
using namespace TextEditor;
namespace CppEditor {
namespace Internal {
class CppQtStyleIndenter final : public TextIndenter
{
public:
explicit CppQtStyleIndenter(QTextDocument *doc)
: TextIndenter(doc)
{
// Just for safety. setCodeStylePreferences should be called when the editor the
// indenter belongs to gets initialized.
m_cppCodeStylePreferences = CppToolsSettings::cppCodeStyle();
}
bool isElectricCharacter(const QChar &ch) const final;
void indentBlock(const QTextBlock &block,
const QChar &typedChar,
const TabSettings &tabSettings,
int cursorPositionInEditor = -1) final;
void indent(const QTextCursor &cursor,
const QChar &typedChar,
const TabSettings &tabSettings,
int cursorPositionInEditor = -1) final;
void setCodeStylePreferences(ICodeStylePreferences *preferences) final;
void invalidateCache() final;
int indentFor(const QTextBlock &block,
const TabSettings &tabSettings,
int cursorPositionInEditor = -1) final;
int visualIndentFor(const QTextBlock &block, const TabSettings &tabSettings) final;
IndentationForBlock indentationForBlocks(const QVector<QTextBlock> &blocks,
const TabSettings &tabSettings,
int cursorPositionInEditor = -1) final;
private:
CppCodeStyleSettings codeStyleSettings() const;
CppCodeStylePreferences *m_cppCodeStylePreferences = nullptr;
};
bool CppQtStyleIndenter::isElectricCharacter(const QChar &ch) const
{
switch (ch.toLatin1()) {
case '{':
case '}':
case ':':
case '#':
case '<':
case '>':
case ';':
return true;
}
return false;
}
static bool isElectricInLine(const QChar ch, const QString &text)
{
switch (ch.toLatin1()) {
case ';':
return text.contains(QLatin1String("break"));
case ':':
// switch cases and access declarations should be reindented
if (text.contains(QLatin1String("case")) || text.contains(QLatin1String("default"))
|| text.contains(QLatin1String("public")) || text.contains(QLatin1String("private"))
|| text.contains(QLatin1String("protected")) || text.contains(QLatin1String("signals"))
|| text.contains(QLatin1String("Q_SIGNALS"))) {
return true;
}
Q_FALLTHROUGH();
// lines that start with : might have a constructor initializer list
case '<':
case '>': {
// Electric if at line beginning (after space indentation)
for (int i = 0, len = text.size(); i < len; ++i) {
if (!text.at(i).isSpace())
return text.at(i) == ch;
}
return false;
}
}
return true;
}
void CppQtStyleIndenter::indentBlock(const QTextBlock &block,
const QChar &typedChar,
const TabSettings &tabSettings,
int /*cursorPositionInEditor*/)
{
QtStyleCodeFormatter codeFormatter(tabSettings, codeStyleSettings());
codeFormatter.updateStateUntil(block);
if (codeFormatter.isInRawStringLiteral(block))
return;
int indent;
int padding;
codeFormatter.indentFor(block, &indent, &padding);
if (isElectricCharacter(typedChar)) {
// : should not be electric for labels
if (!isElectricInLine(typedChar, block.text()))
return;
// only reindent the current line when typing electric characters if the
// indent is the same it would be if the line were empty
int newlineIndent;
int newlinePadding;
codeFormatter.indentForNewLineAfter(block.previous(), &newlineIndent, &newlinePadding);
if (tabSettings.indentationColumn(block.text()) != newlineIndent + newlinePadding)
return;
}
tabSettings.indentLine(block, indent + padding, padding);
}
void CppQtStyleIndenter::indent(const QTextCursor &cursor,
const QChar &typedChar,
const TabSettings &tabSettings,
int /*cursorPositionInEditor*/)
{
if (cursor.hasSelection()) {
QTextBlock block = m_doc->findBlock(cursor.selectionStart());
const QTextBlock end = m_doc->findBlock(cursor.selectionEnd()).next();
QtStyleCodeFormatter codeFormatter(tabSettings, codeStyleSettings());
codeFormatter.updateStateUntil(block);
QTextCursor tc = cursor;
tc.beginEditBlock();
do {
if (!codeFormatter.isInRawStringLiteral(block)) {
int indent;
int padding;
codeFormatter.indentFor(block, &indent, &padding);
tabSettings.indentLine(block, indent + padding, padding);
}
codeFormatter.updateLineStateChange(block);
block = block.next();
} while (block.isValid() && block != end);
tc.endEditBlock();
} else {
indentBlock(cursor.block(), typedChar, tabSettings);
}
}
void CppQtStyleIndenter::setCodeStylePreferences(ICodeStylePreferences *preferences)
{
auto cppCodeStylePreferences = qobject_cast<CppCodeStylePreferences *>(preferences);
if (cppCodeStylePreferences)
m_cppCodeStylePreferences = cppCodeStylePreferences;
}
void CppQtStyleIndenter::invalidateCache()
{
QtStyleCodeFormatter formatter;
formatter.invalidateCache(m_doc);
}
int CppQtStyleIndenter::indentFor(const QTextBlock &block,
const TabSettings &tabSettings,
int /*cursorPositionInEditor*/)
{
QtStyleCodeFormatter codeFormatter(tabSettings, codeStyleSettings());
codeFormatter.updateStateUntil(block);
int indent;
int padding;
codeFormatter.indentFor(block, &indent, &padding);
return indent;
}
int CppQtStyleIndenter::visualIndentFor(const QTextBlock &block,
const TabSettings &tabSettings)
{
return indentFor(block, tabSettings);
}
CppCodeStyleSettings CppQtStyleIndenter::codeStyleSettings() const
{
if (m_cppCodeStylePreferences)
return m_cppCodeStylePreferences->currentCodeStyleSettings();
return {};
}
IndentationForBlock CppQtStyleIndenter::indentationForBlocks(
const QVector<QTextBlock> &blocks,
const TabSettings &tabSettings,
int /*cursorPositionInEditor*/)
{
QtStyleCodeFormatter codeFormatter(tabSettings, codeStyleSettings());
codeFormatter.updateStateUntil(blocks.last());
IndentationForBlock ret;
for (const QTextBlock &block : blocks) {
int indent;
int padding;
codeFormatter.indentFor(block, &indent, &padding);
ret.insert(block.blockNumber(), indent);
}
return ret;
}
} // namespace Internal
Indenter *createCppQtStyleIndenter(QTextDocument *doc)
{
return new Internal::CppQtStyleIndenter(doc);
}
} // namespace CppEditor
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