tagsfiltermodel.cpp

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/**********************************************************************
 * LeechCraft - modular cross-platform feature rich internet client.
 * Copyright (C) 2006-2014  Georg Rudoy
 *
 * Distributed under the Boost Software License, Version 1.0.
 * (See accompanying file LICENSE or copy at https://www.boost.org/LICENSE_1_0.txt)
 **********************************************************************/
 
#include "tagsfiltermodel.h"
#include <QRegularExpression>
#include <QStringList>
#include <util/sll/unreachable.h>
#include "util.h"
 
namespace LC::Util
{
    TagsFilterModel::TagsFilterModel (QObject *parent)
    : FixedStringFilterProxyModel { parent }
    , Separator_ { GetDefaultTagsSeparator () }
    {
    }
 
    void TagsFilterModel::SetTagsRole (int role, const ITagsManager& tm)
    {
        beginFilterChange ();
        TagsRole_ = role;
        TagsManager_ = &tm;
        endFilterChange (Direction::Rows);
    }
 
    void TagsFilterModel::SetSeparator (const QString& separator)
    {
        beginFilterChange ();
        Separator_ = separator;
        endFilterChange (Direction::Rows);
    }
 
    void TagsFilterModel::SetTagsInclusionMode (TagsFilterModel::TagsInclusionMode mode)
    {
        beginFilterChange ();
        TagsMode_ = mode;
        endFilterChange (Direction::Rows);
    }
 
    void TagsFilterModel::SetTagsMode (bool tags)
    {
        beginFilterChange ();
        NormalMode_ = !tags;
        endFilterChange (Direction::Rows);
    }
 
    void TagsFilterModel::UpdateDerivedFilter (const QString& string)
    {
        FilterTags_.clear ();
        for (const auto& s : QStringView { string }.split (Separator_, Qt::SkipEmptyParts))
            FilterTags_ << s.trimmed ().toString ();
    }
 
    bool TagsFilterModel::filterAcceptsRow (int sourceRow, const QModelIndex& index) const
    {
        if (NormalMode_)
            return FixedStringFilterProxyModel::filterAcceptsRow (sourceRow, index);
 
        return FilterTagsMode (sourceRow, index);
    }
 
    QStringList TagsFilterModel::GetTagsForIndex (int row) const
    {
        if (TagsRole_ < 0)
            throw std::runtime_error { "no tags role for the default TagsFilterModel::GetTagsForIndex() implementation" };
 
        const auto model = sourceModel ();
        if (!model)
            return {};
 
        return TagsManager_->GetTags (model->index (row, 0).data (TagsRole_).value<QList<TagId>> ());
    }
 
    bool TagsFilterModel::FilterTagsMode (int sourceRow, const QModelIndex&) const
    {
        if (FilterTags_.isEmpty ())
            return true;
 
        const auto& itemTags = GetTagsForIndex (sourceRow);
        const auto hasTag = [&] (const QString& tag) { return itemTags.contains (tag); };
        switch (TagsMode_)
        {
        case TagsInclusionMode::Any:
            return std::ranges::any_of (FilterTags_, hasTag);
        case TagsInclusionMode::All:
            return std::ranges::all_of (FilterTags_, hasTag);
        }
 
        Unreachable ();
    }
}