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/*
Copyright © 2019 by The qTox Project Contributors
This file is part of qTox, a Qt-based graphical interface for Tox.
qTox is libre software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
qTox is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with qTox. If not, see <http://www.gnu.org/licenses/>.
*/
#include "genericchatitemlayout.h"
#include "genericchatitemwidget.h"
#include <QBoxLayout>
#include <QCollator>
#include <cassert>
// As this layout sorts widget, extra care must be taken when inserting widgets.
// Prefer using the build in add and remove functions for modifying widgets.
// Inserting widgets other ways would cause this layout to be unable to sort.
// As such, they are protected using asserts.
GenericChatItemLayout::GenericChatItemLayout()
: layout(new QVBoxLayout())
{
}
GenericChatItemLayout::~GenericChatItemLayout()
{
delete layout;
}
void GenericChatItemLayout::addSortedWidget(GenericChatItemWidget* widget, int stretch,
Qt::Alignment alignment)
{
int closest = indexOfClosestSortedWidget(widget);
layout->insertWidget(closest, widget, stretch, alignment);
}
int GenericChatItemLayout::indexOfSortedWidget(GenericChatItemWidget* widget) const
{
if (layout->isEmpty())
return -1;
int index = indexOfClosestSortedWidget(widget);
if (index >= layout->count())
return -1;
GenericChatItemWidget* atMid =
qobject_cast<GenericChatItemWidget*>(layout->itemAt(index)->widget());
assert(atMid != nullptr);
if (atMid == widget)
return index;
return -1;
}
bool GenericChatItemLayout::existsSortedWidget(GenericChatItemWidget* widget) const
{
return indexOfSortedWidget(widget) != -1;
}
void GenericChatItemLayout::removeSortedWidget(GenericChatItemWidget* widget)
{
if (layout->isEmpty())
return;
int index = indexOfClosestSortedWidget(widget);
if (layout->itemAt(index) == nullptr)
return;
GenericChatItemWidget* atMid =
qobject_cast<GenericChatItemWidget*>(layout->itemAt(index)->widget());
assert(atMid != nullptr);
if (atMid == widget)
layout->removeWidget(widget);
}
void GenericChatItemLayout::search(const QString& searchString, bool hideAll)
{
for (int index = 0; index < layout->count(); ++index) {
GenericChatItemWidget* widgetAt =
qobject_cast<GenericChatItemWidget*>(layout->itemAt(index)->widget());
assert(widgetAt != nullptr);
widgetAt->searchName(searchString, hideAll);
}
}
QLayout* GenericChatItemLayout::getLayout() const
{
return layout;
}
int GenericChatItemLayout::indexOfClosestSortedWidget(GenericChatItemWidget* widget) const
{
// Binary search: Deferred test of equality.
int min = 0, max = layout->count();
while (min < max) {
int mid = (max - min) / 2 + min;
GenericChatItemWidget* atMid =
qobject_cast<GenericChatItemWidget*>(layout->itemAt(mid)->widget());
assert(atMid != nullptr);
bool lessThan = false;
QCollator collator;
collator.setNumericMode(true);
int compareValue = collator.compare(atMid->getName(), widget->getName());
if (compareValue < 0)
lessThan = true;
else if (compareValue == 0)
lessThan = atMid < widget; // Consistent ordering.
if (lessThan)
min = mid + 1;
else
max = mid;
}
return min;
}
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