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** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
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** This file is part of Qt Creator.
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** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
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#include "linenumberfilter.h"
#include "itexteditor.h"

#include <coreplugin/coreconstants.h>
#include <coreplugin/editormanager/editormanager.h>
#include <coreplugin/icore.h>
#include <coreplugin/modemanager.h>

#include <QMetaType>
#include <QPair>
#include <QVariant>

typedef QPair<int,int> LineColumn;
Q_DECLARE_METATYPE(LineColumn)

using namespace Core;
using namespace Locator;
using namespace TextEditor;
using namespace TextEditor::Internal;

LineNumberFilter::LineNumberFilter(QObject *parent)
  : ILocatorFilter(parent)
{
    setId("Line in current document");
    setDisplayName(tr("Line in Current Document"));
    setPriority(High);
    setShortcutString(QString(QLatin1Char('l')));
    setIncludedByDefault(true);
}

QList<FilterEntry> LineNumberFilter::matchesFor(QFutureInterface<Locator::FilterEntry> &, const QString &entry)
{
    QList<FilterEntry> value;
    QStringList lineAndColumn = entry.split(QLatin1Char(':'));
    int sectionCount = lineAndColumn.size();
    int line = 0;
    int column = 0;
    bool ok = false;
    if (sectionCount > 0)
        line = lineAndColumn.at(0).toInt(&ok);
    if (ok && sectionCount > 1)
        column = lineAndColumn.at(1).toInt(&ok);
    if (!ok)
        return value;
    if (currentTextEditor() && (line > 0 || column > 0)) {
        LineColumn data;
        data.first = line;
        data.second = column - 1;  // column API is 0-based
        QString text;
        if (line > 0 && column > 0)
            text = tr("Line %1, Column %2").arg(line).arg(column);
        else if (line > 0)
            text = tr("Line %1").arg(line);
        else
            text = tr("Column %1").arg(column);
        value.append(FilterEntry(this, text, QVariant::fromValue(data)));
    }
    return value;
}

void LineNumberFilter::accept(FilterEntry selection) const
{
    ITextEditor *editor = currentTextEditor();
    if (editor) {
        EditorManager::addCurrentPositionToNavigationHistory();
        LineColumn data = selection.internalData.value<LineColumn>();
        if (data.first < 1) { // jump to column in same line
            int currLine, currColumn;
            editor->convertPosition(editor->position(), &currLine, &currColumn);
            data.first = currLine;
        }
        editor->gotoLine(data.first, data.second);
        EditorManager::activateEditor(editor);
    }
}

ITextEditor *LineNumberFilter::currentTextEditor() const
{
    return qobject_cast<TextEditor::ITextEditor *>(EditorManager::currentEditor());
}