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#include "sqlcompareview.h"
#include "sqlview.h"
#include "common/utils.h"
#include "diff/diff_match_patch.h"
#include "sqlitesyntaxhighlighter.h"
#include <QHeaderView>
#include <QDebug>
SqlCompareView::SqlCompareView(QWidget *parent) :
QTableWidget(parent)
{
setColumnCount(2);
setVerticalScrollMode(ScrollPerPixel);
horizontalHeader()->setSectionResizeMode(0, QHeaderView::Stretch);
horizontalHeader()->setSectionResizeMode(1, QHeaderView::Stretch);
horizontalHeader()->setVisible(false);
// verticalHeader()->setSectionResizeMode(QHeaderView::ResizeToContents);
diff = new diff_match_patch;
}
void SqlCompareView::setSides(const QList<QPair<QString, QString>>& data)
{
setRowCount(data.size());
int row = 0;
SqlView* leftView = nullptr;
SqlView* rightView = nullptr;
for (const QPair<QString, QString>& rowData : data)
{
leftView = new SqlView();
leftView->setFrameStyle(QFrame::NoFrame);
leftView->setPlainText(rowData.first);
setCellWidget(row, 0, leftView);
rightView = new SqlView();
rightView->setFrameStyle(QFrame::NoFrame);
rightView->setPlainText(rowData.second);
setCellWidget(row, 1, rightView);
setupHighlighting(rowData.first, rowData.second, leftView, rightView);
row++;
}
updateLabels();
updateSizes();
}
void SqlCompareView::setLeftLabel(const QString& label)
{
leftLabel = label;
}
void SqlCompareView::setRightLabel(const QString& label)
{
rightLabel = label;
}
void SqlCompareView::updateSizes()
{
if (rowCount() == 0 || !isVisible())
return;
SqlView* view = dynamic_cast<SqlView*>(cellWidget(0, 0));
if (!view)
{
qCritical() << "Not a SqlView in SqlCompareView::updateSizes():" << cellWidget(0, 0);
return;
}
QFont font = view->font();
QFontMetrics fm(font);
int leftWidth = horizontalHeader()->sectionSize(0);
int rightWidth = horizontalHeader()->sectionSize(1);
SqlView* leftView = nullptr;
SqlView* rightView = nullptr;
QSize leftSize;
QSize rightSize;
for (int row = 0, total = rowCount(); row < total; ++row)
{
leftView = dynamic_cast<SqlView*>(cellWidget(row, 0));
leftView->document()->setTextWidth(leftWidth);
rightView = dynamic_cast<SqlView*>(cellWidget(row, 1));
rightView->document()->setTextWidth(rightWidth);
leftSize = QSize(leftWidth, leftView->document()->size().toSize().height());
rightSize = QSize(rightWidth, rightView->document()->size().toSize().height());
if (leftSize.height() > rightSize.height())
rightSize.setHeight(leftSize.height());
else
leftSize.setHeight(rightSize.height());
leftView->setFixedSize(leftSize);
rightView->setFixedSize(rightSize);
}
verticalHeader()->resizeSections(QHeaderView::ResizeToContents);
}
void SqlCompareView::updateLabels()
{
setHorizontalHeaderLabels({leftLabel, rightLabel});
}
void SqlCompareView::setupHighlighting(const QString& left, const QString& right, SqlView* leftView, SqlView* rightView)
{
QList<Diff> diffs = diff->diff_main(left, right);
int leftPos = 0;
int rightPos = 0;
int lgt = 0;
for (const Diff& d : diffs)
{
lgt = d.text.length();
switch (d.operation)
{
case DELETE:
leftView->setTextBackgroundColor(leftPos, leftPos + lgt - 1, Qt::red);
leftPos += lgt;
break;
case EQUAL:
leftPos += lgt;
rightPos += lgt;
break;
case INSERT:
rightView->setTextBackgroundColor(leftPos, leftPos + lgt - 1, Qt::green);
rightPos += lgt;
break;
}
}
}
void SqlCompareView::resizeEvent(QResizeEvent* e)
{
QTableWidget::resizeEvent(e);
updateSizes();
}
void SqlCompareView::showEvent(QShowEvent* e)
{
QTableWidget::showEvent(e);
updateSizes();
}
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