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/*
 * Copyright (c) 2010-2016 Isode Limited.
 * All rights reserved.
 * See the COPYING file for more information.
 */

#include <Swift/QtUI/ChatList/ChatListDelegate.h>

#include <QColor>
#include <QPainter>
#include <QPen>

#include <Swift/QtUI/ChatList/ChatListGroupItem.h>
#include <Swift/QtUI/ChatList/ChatListItem.h>
#include <Swift/QtUI/ChatList/ChatListMUCItem.h>
#include <Swift/QtUI/ChatList/ChatListRecentItem.h>
#include <Swift/QtUI/ChatList/ChatListWhiteboardItem.h>
#include <Swift/QtUI/Roster/GroupItemDelegate.h>

namespace Swift {

namespace {
    const QColor secondLineColor = QColor(160,160,160);
}

ChatListDelegate::ChatListDelegate(bool compact) : compact_(compact) {
    groupDelegate_ = new GroupItemDelegate();
}

ChatListDelegate::~ChatListDelegate() {
    delete groupDelegate_;
}

void ChatListDelegate::setCompact(bool compact) {
    compact_ = compact;
    emit sizeHintChanged(QModelIndex());
}

QSize ChatListDelegate::sizeHint(const QStyleOptionViewItem& option, const QModelIndex& index ) const {
    ChatListItem* item = static_cast<ChatListItem*>(index.internalPointer());
    if (item && dynamic_cast<ChatListMUCItem*>(item)) {
        return mucSizeHint(option, index);
    }
    else if (item && dynamic_cast<ChatListRecentItem*>(item)) {
        return common_.contactSizeHint(option, index, compact_);
    }
    else if (item && dynamic_cast<ChatListGroupItem*>(item)) {
        return groupDelegate_->sizeHint(option, index);
    }
    else if (item && dynamic_cast<ChatListWhiteboardItem*>(item)) {
        return common_.contactSizeHint(option, index, compact_);
    }
    return QStyledItemDelegate::sizeHint(option, index);
}

QSize ChatListDelegate::mucSizeHint(const QStyleOptionViewItem& /*option*/, const QModelIndex& /*index*/ ) const {
    QFontMetrics nameMetrics(common_.nameFont);
    QFontMetrics statusMetrics(common_.detailFont);
    int sizeByText = 2 * common_.verticalMargin + nameMetrics.height() + statusMetrics.height();
    return QSize(150, sizeByText);
}

QSize ChatListDelegate::recentSizeHint(const QStyleOptionViewItem& option, const QModelIndex& index) const {
    return mucSizeHint(option, index);
}

void ChatListDelegate::paint(QPainter* painter, const QStyleOptionViewItem& option, const QModelIndex& index) const {
    ChatListItem* item = static_cast<ChatListItem*>(index.internalPointer());
    if (item && dynamic_cast<ChatListMUCItem*>(item)) {
        paintMUC(painter, option, dynamic_cast<ChatListMUCItem*>(item));
    }
    else if (item && dynamic_cast<ChatListRecentItem*>(item)) {
        paintRecent(painter, option, dynamic_cast<ChatListRecentItem*>(item));
    }
    else if (item && dynamic_cast<ChatListGroupItem*>(item)) {
        ChatListGroupItem* group = dynamic_cast<ChatListGroupItem*>(item);
        groupDelegate_->paint(painter, option, group->data(Qt::DisplayRole).toString(), group->rowCount(), option.state & QStyle::State_Open);
    }
    else if (item && dynamic_cast<ChatListWhiteboardItem*>(item)) {
        paintWhiteboard(painter, option, dynamic_cast<ChatListWhiteboardItem*>(item));
    }
    else {
        QStyledItemDelegate::paint(painter, option, index);
    }
}

void ChatListDelegate::paintMUC(QPainter* painter, const QStyleOptionViewItem& option, ChatListMUCItem* item) const {
    painter->save();
    QRect fullRegion(option.rect);
    if ( option.state & QStyle::State_Selected ) {
        painter->fillRect(fullRegion, option.palette.highlight());
        painter->setPen(option.palette.highlightedText().color());
    } else {
        QColor nameColor = item->data(Qt::TextColorRole).value<QColor>();
        painter->setPen(QPen(nameColor));
    }

    QFontMetrics nameMetrics(common_.nameFont);
    painter->setFont(common_.nameFont);
    int extraFontWidth = nameMetrics.width("H");
    int leftOffset = common_.horizontalMargin * 2 + extraFontWidth / 2;
    QRect textRegion(fullRegion.adjusted(leftOffset, 0, 0, 0));

    int nameHeight = nameMetrics.height() + common_.verticalMargin;
    QRect nameRegion(textRegion.adjusted(0, common_.verticalMargin, 0, 0));

    DelegateCommons::drawElidedText(painter, nameRegion, item->data(Qt::DisplayRole).toString());

    painter->setFont(common_.detailFont);
    painter->setPen(QPen(secondLineColor));

    QRect detailRegion(textRegion.adjusted(0, nameHeight, 0, 0));
    DelegateCommons::drawElidedText(painter, detailRegion, item->data(ChatListMUCItem::DetailTextRole).toString());

    painter->restore();
}

void ChatListDelegate::paintRecent(QPainter* painter, const QStyleOptionViewItem& option, ChatListRecentItem* item) const {
    QColor nameColor = item->data(Qt::TextColorRole).value<QColor>();
    QString avatarPath;
    if (item->data(ChatListRecentItem::AvatarRole).isValid() && !item->data(ChatListRecentItem::AvatarRole).value<QString>().isNull()) {
        avatarPath = item->data(ChatListRecentItem::AvatarRole).value<QString>();
    }
    QIcon presenceIcon = item->data(ChatListRecentItem::PresenceIconRole).isValid() && !item->data(ChatListRecentItem::PresenceIconRole).value<QIcon>().isNull()
            ? item->data(ChatListRecentItem::PresenceIconRole).value<QIcon>()
            : QIcon(":/icons/offline.png");
    QString name = item->data(Qt::DisplayRole).toString();
    //qDebug() << "Avatar for " << name << " = " << avatarPath;
    QString statusText = item->data(ChatListRecentItem::DetailTextRole).toString();
    common_.paintContact(painter, option, nameColor, avatarPath, presenceIcon, name, statusText, false, item->getChat().unreadCount, compact_);
}

void ChatListDelegate::paintWhiteboard(QPainter* painter, const QStyleOptionViewItem& option, ChatListWhiteboardItem* item) const {
    QColor nameColor = item->data(Qt::TextColorRole).value<QColor>();
    QString avatarPath;
    if (item->data(ChatListWhiteboardItem::AvatarRole).isValid() && !item->data(ChatListWhiteboardItem::AvatarRole).value<QString>().isNull()) {
        avatarPath = item->data(ChatListWhiteboardItem::AvatarRole).value<QString>();
    }
    QIcon presenceIcon;/* = item->data(ChatListWhiteboardItem::PresenceIconRole).isValid() && !item->data(ChatListWhiteboardItem::PresenceIconRole).value<QIcon>().isNull()
            ? item->data(ChatListWhiteboardItem::PresenceIconRole).value<QIcon>()
            : QIcon(":/icons/offline.png");*/
    QString name = item->data(Qt::DisplayRole).toString();
    //qDebug() << "Avatar for " << name << " = " << avatarPath;
    QString statusText = item->data(ChatListWhiteboardItem::DetailTextRole).toString();
    common_.paintContact(painter, option, nameColor, avatarPath, presenceIcon, name, statusText, false, item->getChat().unreadCount, compact_);

}

}