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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 "textindenter.h"
#include <QTextDocument>
#include <QTextCursor>
namespace TextEditor {
TextIndenter::TextIndenter(QTextDocument *doc)
: Indenter(doc)
{}
TextIndenter::~TextIndenter() = default;
// Indent a text block based on previous line.
// Simple text paragraph layout:
// aaaa aaaa
//
// bbb bb
// bbb bb
//
// - list
// list line2
//
// - listn
//
// ccc
//
// @todo{Add formatting to wrap paragraphs. This requires some
// hoops as the current indentation routines are not prepared
// for additional block being inserted. It might be possible
// to do in 2 steps (indenting/wrapping)}
int TextIndenter::indentFor(const QTextBlock &block,
const TabSettings &tabSettings,
int cursorPositionInEditor)
{
Q_UNUSED(tabSettings)
Q_UNUSED(cursorPositionInEditor)
QTextBlock previous = block.previous();
if (!previous.isValid())
return 0;
const QString previousText = previous.text();
// Empty line indicates a start of a new paragraph. Leave as is.
if (previousText.isEmpty() || previousText.trimmed().isEmpty())
return 0;
return tabSettings.indentationColumn(previousText);
}
IndentationForBlock TextIndenter::indentationForBlocks(const QVector<QTextBlock> &blocks,
const TabSettings &tabSettings,
int /*cursorPositionInEditor*/)
{
IndentationForBlock ret;
for (const QTextBlock &block : blocks)
ret.insert(block.blockNumber(), indentFor(block, tabSettings));
return ret;
}
void TextIndenter::indentBlock(const QTextBlock &block,
const QChar &typedChar,
const TabSettings &tabSettings,
int /*cursorPositionInEditor*/)
{
Q_UNUSED(typedChar)
const int indent = indentFor(block, tabSettings);
if (indent < 0)
return;
tabSettings.indentLine(block, indent);
}
void TextIndenter::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();
do {
indentBlock(block, typedChar, tabSettings);
block = block.next();
} while (block.isValid() && block != end);
} else {
indentBlock(cursor.block(), typedChar, tabSettings);
}
}
void TextIndenter::reindent(const QTextCursor &cursor,
const TabSettings &tabSettings,
int /*cursorPositionInEditor*/)
{
if (cursor.hasSelection()) {
QTextBlock block = m_doc->findBlock(cursor.selectionStart());
const QTextBlock end = m_doc->findBlock(cursor.selectionEnd()).next();
// skip empty blocks
while (block.isValid() && block != end) {
QString bt = block.text();
if (TabSettings::firstNonSpace(bt) < bt.size())
break;
indentBlock(block, QChar::Null, tabSettings);
block = block.next();
}
int previousIndentation = tabSettings.indentationColumn(block.text());
indentBlock(block, QChar::Null, tabSettings);
int currentIndentation = tabSettings.indentationColumn(block.text());
int delta = currentIndentation - previousIndentation;
block = block.next();
while (block.isValid() && block != end) {
tabSettings.reindentLine(block, delta);
block = block.next();
}
} else {
indentBlock(cursor.block(), QChar::Null, tabSettings);
}
}
std::optional<TabSettings> TextIndenter::tabSettings() const
{
return std::optional<TabSettings>();
}
void PlainTextIndenter::autoIndent(const QTextCursor &cursor,
const TabSettings &tabSettings,
int cursorPositionInEditor)
{
Q_UNUSED(cursor);
Q_UNUSED(tabSettings);
Q_UNUSED(cursorPositionInEditor);
}
} // namespace TextEditor
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