1 files changed, 144 insertions, 0 deletions
diff --git a/launcher/ui/widgets/LogView.cpp b/launcher/ui/widgets/LogView.cpp
new file mode 100644
index 00000000..26a2a527
--- /dev/null
+++ b/launcher/ui/widgets/LogView.cpp
@@ -0,0 +1,144 @@
+#include "LogView.h"
+#include <QTextBlock>
+#include <QScrollBar>
+
+LogView::LogView(QWidget* parent) : QPlainTextEdit(parent)
+{
+    setWordWrapMode(QTextOption::WrapAtWordBoundaryOrAnywhere);
+    m_defaultFormat = new QTextCharFormat(currentCharFormat());
+}
+
+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::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)
+{
+    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::TextColorRole);
+        if(fg.isValid())
+        {
+            format.setForeground(fg.value<QColor>());
+        }
+        auto bg = m_model->data(idx, Qt::BackgroundRole);
+        if(bg.isValid())
+        {
+            format.setBackground(bg.value<QColor>());
+        }
+        auto workCursor = textCursor();
+        workCursor.movePosition(QTextCursor::End);
+        workCursor.insertText(text, format);
+        workCursor.insertBlock();
+    }
+    if(m_scroll && !m_scrolling)
+    {
+        m_scrolling = true;
+        QMetaObject::invokeMethod( this, "scrollToBottom", Qt::QueuedConnection);
+    }
+}
+
+void LogView::rowsRemoved(const QModelIndex& parent, int first, int last)
+{
+    // TODO: some day... maybe
+    Q_UNUSED(parent)
+    Q_UNUSED(first)
+    Q_UNUSED(last)
+}
+
+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));
+}