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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0+ OR GPL-3.0 WITH Qt-GPL-exception-1.0
#include "pathlisteditor.h"
#include "fileutils.h"
#include "hostosinfo.h"
#include <QMimeData>
#include <QPlainTextEdit>
#include <QPushButton>
#include <QSharedPointer>
#include <QTextBlock>
#include <QVBoxLayout>
/*!
\class Utils::PathListEditor
\brief The PathListEditor class is a control that lets the user edit a list
of (directory) paths
using the platform separator (';',':').
Typically used for
path lists controlled by environment variables, such as
PATH. It is based on a QPlainTextEdit as it should
allow for convenient editing and non-directory type elements like
\code
"etc/mydir1:$SPECIAL_SYNTAX:/etc/mydir2".
\endcode
When pasting text into it, the platform separator will be replaced
by new line characters for convenience.
*/
namespace Utils {
const int PathListEditor::lastInsertButtonIndex = 0;
// ------------ PathListPlainTextEdit:
// Replaces the platform separator ';',':' by '\n'
// when inserting, allowing for pasting in paths
// from the terminal or such.
class PathListPlainTextEdit : public QPlainTextEdit {
public:
explicit PathListPlainTextEdit(QWidget *parent = nullptr);
protected:
void insertFromMimeData (const QMimeData *source) override;
};
PathListPlainTextEdit::PathListPlainTextEdit(QWidget *parent) :
QPlainTextEdit(parent)
{
// No wrapping, scroll at all events
setHorizontalScrollBarPolicy(Qt::ScrollBarAsNeeded);
setLineWrapMode(QPlainTextEdit::NoWrap);
}
void PathListPlainTextEdit::insertFromMimeData(const QMimeData *source)
{
if (source->hasText()) {
// replace separator
QString text = source->text().trimmed();
text.replace(HostOsInfo::pathListSeparator(), QLatin1Char('\n'));
QSharedPointer<QMimeData> fixed(new QMimeData);
fixed->setText(text);
QPlainTextEdit::insertFromMimeData(fixed.data());
} else {
QPlainTextEdit::insertFromMimeData(source);
}
}
// ------------ PathListEditorPrivate
struct PathListEditorPrivate {
PathListEditorPrivate();
QHBoxLayout *layout;
QVBoxLayout *buttonLayout;
QPlainTextEdit *edit;
QString fileDialogTitle;
};
PathListEditorPrivate::PathListEditorPrivate() :
layout(new QHBoxLayout),
buttonLayout(new QVBoxLayout),
edit(new PathListPlainTextEdit)
{
layout->setContentsMargins(0, 0, 0, 0);
layout->addWidget(edit);
layout->addLayout(buttonLayout);
buttonLayout->addItem(new QSpacerItem(0, 0, QSizePolicy::Ignored,
QSizePolicy::MinimumExpanding));
}
PathListEditor::PathListEditor(QWidget *parent) :
QWidget(parent),
d(new PathListEditorPrivate)
{
setLayout(d->layout);
addButton(tr("Insert..."), this, [this] {
const FilePath dir = FileUtils::getExistingDirectory(this, d->fileDialogTitle);
if (!dir.isEmpty())
insertPathAtCursor(dir.toUserOutput());
});
addButton(tr("Delete Line"), this, [this] { deletePathAtCursor(); });
addButton(tr("Clear"), this, [this] { d->edit->clear(); });
connect(d->edit, &QPlainTextEdit::textChanged, this, &PathListEditor::changed);
}
PathListEditor::~PathListEditor()
{
delete d;
}
QPushButton *PathListEditor::addButton(const QString &text, QObject *parent,
std::function<void()> slotFunc)
{
return insertButton(d->buttonLayout->count() - 1, text, parent, slotFunc);
}
QPushButton *PathListEditor::insertButton(int index /* -1 */, const QString &text, QObject *parent,
std::function<void()> slotFunc)
{
auto rc = new QPushButton(text, this);
QObject::connect(rc, &QPushButton::pressed, parent, slotFunc);
d->buttonLayout->insertWidget(index, rc);
return rc;
}
QString PathListEditor::pathListString() const
{
return pathList().join(HostOsInfo::pathListSeparator());
}
QStringList PathListEditor::pathList() const
{
const QString text = d->edit->toPlainText().trimmed();
if (text.isEmpty())
return QStringList();
// trim each line
QStringList rc = text.split('\n', Qt::SkipEmptyParts);
const QStringList::iterator end = rc.end();
for (QStringList::iterator it = rc.begin(); it != end; ++it)
*it = it->trimmed();
return rc;
}
void PathListEditor::setPathList(const QStringList &l)
{
d->edit->setPlainText(l.join(QLatin1Char('\n')));
}
void PathListEditor::setPathList(const QString &pathString)
{
if (pathString.isEmpty()) {
clear();
} else {
setPathList(pathString.split(HostOsInfo::pathListSeparator(),
Qt::SkipEmptyParts));
}
}
QString PathListEditor::fileDialogTitle() const
{
return d->fileDialogTitle;
}
void PathListEditor::setFileDialogTitle(const QString &l)
{
d->fileDialogTitle = l;
}
void PathListEditor::setPlaceholderText(const QString &placeholder)
{
d->edit->setPlaceholderText(placeholder);
}
void PathListEditor::clear()
{
d->edit->clear();
}
QString PathListEditor::text() const
{
return d->edit->toPlainText();
}
void PathListEditor::setText(const QString &t)
{
d->edit->setPlainText(t);
}
void PathListEditor::insertPathAtCursor(const QString &path)
{
// If the cursor is at an empty line or at end(),
// just insert. Else insert line before
QTextCursor cursor = d->edit->textCursor();
QTextBlock block = cursor.block();
const bool needNewLine = !block.text().isEmpty();
if (needNewLine) {
cursor.movePosition(QTextCursor::StartOfLine, QTextCursor::MoveAnchor);
cursor.insertBlock();
cursor.movePosition(QTextCursor::PreviousBlock, QTextCursor::MoveAnchor);
}
cursor.insertText(path);
if (needNewLine) {
cursor.movePosition(QTextCursor::StartOfLine, QTextCursor::MoveAnchor);
d->edit->setTextCursor(cursor);
}
}
void PathListEditor::deletePathAtCursor()
{
// Delete current line
QTextCursor cursor = d->edit->textCursor();
if (cursor.block().isValid()) {
cursor.movePosition(QTextCursor::StartOfLine, QTextCursor::MoveAnchor);
// Select down or until end of [last] line
if (!cursor.movePosition(QTextCursor::Down, QTextCursor::KeepAnchor))
cursor.movePosition(QTextCursor::EndOfLine, QTextCursor::KeepAnchor);
cursor.removeSelectedText();
d->edit->setTextCursor(cursor);
}
}
} // namespace Utils
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