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// SPDX-License-Identifier: GPL-3.0-only
// SPDX-FileCopyrightText: 2026 Project Tick
// SPDX-FileContributor: Project Tick Team
/*
* ProjT Launcher - Minecraft Launcher
* Copyright (C) 2026 Project Tick
*
* This program is free 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, version 3.
*
* This program 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 this program. If not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* === Upstream License Block (Do Not Modify) ==============================
*
*
*
* Prism Launcher - Minecraft Launcher
* Copyright (C) 2022 Sefa Eyeoglu <contact@scrumplex.net>
*
* This program is free 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, version 3.
*
* This program 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 this program. If not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* This file incorporates work covered by the following copyright and
* permission notice:
*
* Copyright 2013-2021 MultiMC Contributors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* ======================================================================== */
#include "LogView.h"
#include <QScrollBar>
#include <QTextBlock>
#include <QTextDocumentFragment>
LogView::LogView(QWidget* parent) : QPlainTextEdit(parent)
{
setWordWrapMode(QTextOption::WrapAtWordBoundaryOrAnywhere);
m_defaultFormat = new QTextCharFormat(currentCharFormat());
setUndoRedoEnabled(false);
}
LogView::~LogView()
{
delete m_defaultFormat;
}
void LogView::setWordWrap(bool wrapping)
{
if (wrapping)
{
setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
setLineWrapMode(QPlainTextEdit::WidgetWidth);
}
else
{
setHorizontalScrollBarPolicy(Qt::ScrollBarAsNeeded);
setLineWrapMode(QPlainTextEdit::NoWrap);
}
}
void LogView::setColorLines(bool colorLines)
{
if (m_colorLines == colorLines)
return;
m_colorLines = colorLines;
repopulate();
}
void LogView::setModel(QAbstractItemModel* model)
{
if (m_model)
{
disconnect(m_model, &QAbstractItemModel::modelReset, this, &LogView::repopulate);
disconnect(m_model, &QAbstractItemModel::rowsInserted, this, &LogView::rowsInserted);
disconnect(m_model, &QAbstractItemModel::rowsAboutToBeInserted, this, &LogView::rowsAboutToBeInserted);
disconnect(m_model, &QAbstractItemModel::rowsRemoved, this, &LogView::rowsRemoved);
}
m_model = model;
if (m_model)
{
connect(m_model, &QAbstractItemModel::modelReset, this, &LogView::repopulate);
connect(m_model, &QAbstractItemModel::rowsInserted, this, &LogView::rowsInserted);
connect(m_model, &QAbstractItemModel::rowsAboutToBeInserted, this, &LogView::rowsAboutToBeInserted);
connect(m_model, &QAbstractItemModel::rowsRemoved, this, &LogView::rowsRemoved);
connect(m_model, &QAbstractItemModel::destroyed, this, &LogView::modelDestroyed);
}
repopulate();
}
QAbstractItemModel* LogView::model() const
{
return m_model;
}
void LogView::modelDestroyed(QObject* model)
{
if (m_model == model)
{
setModel(nullptr);
}
}
void LogView::repopulate()
{
auto doc = document();
doc->clear();
if (!m_model)
{
return;
}
rowsInserted(QModelIndex(), 0, m_model->rowCount() - 1);
}
void LogView::rowsAboutToBeInserted(const QModelIndex& parent, int first, int last)
{
Q_UNUSED(parent)
Q_UNUSED(first)
Q_UNUSED(last)
QScrollBar* bar = verticalScrollBar();
int max_bar = bar->maximum();
int val_bar = bar->value();
if (m_scroll)
{
m_scroll = (max_bar - val_bar) <= 1;
}
else
{
m_scroll = val_bar == max_bar;
}
}
void LogView::rowsInserted(const QModelIndex& parent, int first, int last)
{
QTextDocument document;
QTextCursor cursor(&document);
cursor.movePosition(QTextCursor::End);
cursor.beginEditBlock();
for (int i = first; i <= last; i++)
{
auto idx = m_model->index(i, 0, parent);
auto text = m_model->data(idx, Qt::DisplayRole).toString();
QTextCharFormat format(*m_defaultFormat);
auto font = m_model->data(idx, Qt::FontRole);
if (font.isValid())
{
format.setFont(font.value<QFont>());
}
auto fg = m_model->data(idx, Qt::ForegroundRole);
if (fg.isValid() && m_colorLines)
{
format.setForeground(fg.value<QColor>());
}
auto bg = m_model->data(idx, Qt::BackgroundRole);
if (bg.isValid() && m_colorLines)
{
format.setBackground(bg.value<QColor>());
}
cursor.insertText(text, format);
cursor.insertBlock();
}
cursor.endEditBlock();
QTextDocumentFragment fragment(&document);
QTextCursor workCursor = textCursor();
workCursor.movePosition(QTextCursor::End);
workCursor.insertFragment(fragment);
if (m_scroll && !m_scrolling)
{
m_scrolling = true;
QMetaObject::invokeMethod(this, "scrollToBottom", Qt::QueuedConnection);
}
}
void LogView::rowsRemoved(const QModelIndex& parent, int first, int last)
{
Q_UNUSED(parent)
Q_UNUSED(first)
Q_UNUSED(last)
// If we were scrolled to the bottom, stay at the bottom after rows are removed
// This ensures the user doesn't lose their position when log lines are removed
if (m_scrolling)
{
QMetaObject::invokeMethod(this, "scrollToBottom", Qt::QueuedConnection);
}
}
void LogView::scrollToBottom()
{
m_scrolling = false;
verticalScrollBar()->setSliderPosition(verticalScrollBar()->maximum());
}
void LogView::findNext(const QString& what, bool reverse)
{
find(what, reverse ? QTextDocument::FindFlag::FindBackward : QTextDocument::FindFlag(0));
}
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