/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
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 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
 *   with this work for additional information regarding copyright
 *   ownership. The ASF licenses this file to you 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 .
 */

#include <controls/table/mousefunction.hxx>
#include <controls/table/TableControl.hxx>
#include <controls/table/tablesort.hxx>

#include <comphelper/diagnose_ex.hxx>
#include <vcl/ptrstyle.hxx>

namespace svt::table
{
//= ColumnResize

FunctionResult ColumnResize::handleMouseMove(TableControl& i_tableControl,
                                             MouseEvent const& i_event)
{
    Point const aPoint = i_event.GetPosPixel();

    if (m_nResizingColumn == COL_INVALID)
    {
        // if we hit a column divider, change the mouse pointer accordingly
        PointerStyle aNewPointer(PointerStyle::Arrow);
        TableCell const tableCell = i_tableControl.hitTest(aPoint);
        if ((tableCell.nRow == ROW_COL_HEADERS) && (tableCell.eArea == ColumnDivider))
        {
            aNewPointer = PointerStyle::HSplit;
        }
        i_tableControl.setPointer(aNewPointer);

        return FunctionResult::SkipFunction; // TODO: is this correct?
    }

    ::Size const tableSize = i_tableControl.getTableSizePixel();

    // set proper pointer
    PointerStyle aNewPointer(PointerStyle::Arrow);
    ColumnMetrics const columnMetrics(i_tableControl.getColumnMetrics(m_nResizingColumn));
    if ((aPoint.X() > tableSize.Width()) || (aPoint.X() < columnMetrics.nStartPixel))
    {
        aNewPointer = PointerStyle::NotAllowed;
    }
    else
    {
        aNewPointer = PointerStyle::HSplit;
    }
    i_tableControl.setPointer(aNewPointer);

    // show tracking line
    i_tableControl.hideTracking();
    i_tableControl.showTracking(tools::Rectangle(Point(aPoint.X(), 0), Size(1, tableSize.Height())),
                                ShowTrackFlags::Split | ShowTrackFlags::TrackWindow);

    return FunctionResult::ContinueFunction;
}

FunctionResult ColumnResize::handleMouseDown(TableControl& i_tableControl,
                                             MouseEvent const& i_event)
{
    if (m_nResizingColumn != COL_INVALID)
    {
        OSL_ENSURE(
            false,
            "ColumnResize::handleMouseDown: suspicious: MouseButtonDown while still tracking?");
        return FunctionResult::ContinueFunction;
    }

    TableCell const tableCell(i_tableControl.hitTest(i_event.GetPosPixel()));
    if (tableCell.nRow == ROW_COL_HEADERS)
    {
        if ((tableCell.nColumn != COL_INVALID) && (tableCell.eArea == ColumnDivider))
        {
            m_nResizingColumn = tableCell.nColumn;
            i_tableControl.captureMouse();
            return FunctionResult::ActivateFunction;
        }
    }

    return FunctionResult::SkipFunction;
}

FunctionResult ColumnResize::handleMouseUp(TableControl& i_tableControl, MouseEvent const& i_event)
{
    if (m_nResizingColumn == COL_INVALID)
        return FunctionResult::SkipFunction;

    Point const aPoint = i_event.GetPosPixel();

    i_tableControl.hideTracking();
    PColumnModel const pColumn = i_tableControl.GetModel()->getColumnModel(m_nResizingColumn);
    tools::Long const maxWidthLogical = pColumn->getMaxWidth();
    tools::Long const minWidthLogical = pColumn->getMinWidth();

    // new position of mouse
    tools::Long const requestedEnd = aPoint.X();

    // old position of right border
    tools::Long const oldEnd = i_tableControl.getColumnMetrics(m_nResizingColumn).nEndPixel;

    // position of left border if cursor in the to-be-resized column
    tools::Long const columnStart = i_tableControl.getColumnMetrics(m_nResizingColumn).nStartPixel;
    tools::Long const requestedWidth = requestedEnd - columnStart;
    // TODO: this is not correct, strictly: It assumes that the mouse was pressed exactly on the "end" pos,
    // but for a while now, we have relaxed this, and allow clicking a few pixels aside, too

    if (requestedEnd >= columnStart)
    {
        tools::Long requestedWidthLogical = i_tableControl.pixelWidthToAppFont(requestedWidth);
        // respect column width limits
        if (oldEnd > requestedEnd)
        {
            // column has become smaller, check against minimum width
            if ((minWidthLogical != 0) && (requestedWidthLogical < minWidthLogical))
                requestedWidthLogical = minWidthLogical;
        }
        else if (oldEnd < requestedEnd)
        {
            // column has become larger, check against max width
            if ((maxWidthLogical != 0) && (requestedWidthLogical >= maxWidthLogical))
                requestedWidthLogical = maxWidthLogical;
        }
        pColumn->setWidth(requestedWidthLogical);
        i_tableControl.invalidate(TableArea::All);
    }

    i_tableControl.setPointer(PointerStyle::Arrow);
    i_tableControl.releaseMouse();

    m_nResizingColumn = COL_INVALID;
    return FunctionResult::DeactivateFunction;
}

//= RowSelection

FunctionResult RowSelection::handleMouseMove(TableControl&, MouseEvent const&)
{
    return FunctionResult::SkipFunction;
}

FunctionResult RowSelection::handleMouseDown(TableControl& i_tableControl,
                                             MouseEvent const& i_event)
{
    bool handled = false;

    TableCell const tableCell(i_tableControl.hitTest(i_event.GetPosPixel()));
    if (tableCell.nRow >= 0)
    {
        if (i_tableControl.getSelEngine()->GetSelectionMode() == SelectionMode::NONE)
        {
            i_tableControl.activateCell(tableCell.nColumn, tableCell.nRow);
            handled = true;
        }
        else
        {
            handled = i_tableControl.getSelEngine()->SelMouseButtonDown(i_event);
        }
    }

    if (handled)
        m_bActive = true;
    return handled ? FunctionResult::ActivateFunction : FunctionResult::SkipFunction;
}

FunctionResult RowSelection::handleMouseUp(TableControl& i_tableControl, MouseEvent const& i_event)
{
    TableCell const tableCell = i_tableControl.hitTest(i_event.GetPosPixel());
    if (tableCell.nRow >= 0)
    {
        if (i_tableControl.getSelEngine()->GetSelectionMode() != SelectionMode::NONE)
        {
            i_tableControl.getSelEngine()->SelMouseButtonUp(i_event);
        }
    }
    if (m_bActive)
    {
        m_bActive = false;
        return FunctionResult::DeactivateFunction;
    }
    return FunctionResult::SkipFunction;
}

//= ColumnSortHandler

FunctionResult ColumnSortHandler::handleMouseMove(TableControl&, MouseEvent const&)
{
    return FunctionResult::SkipFunction;
}

FunctionResult ColumnSortHandler::handleMouseDown(TableControl& i_tableControl,
                                                  MouseEvent const& i_event)
{
    if (m_nActiveColumn != COL_INVALID)
    {
        OSL_ENSURE(false,
                   "ColumnSortHandler::handleMouseDown: called while already active - suspicious!");
        return FunctionResult::ContinueFunction;
    }

    if (i_tableControl.GetModel()->getSortAdapter() == nullptr)
        // no sorting support at the model
        return FunctionResult::SkipFunction;

    TableCell const tableCell(i_tableControl.hitTest(i_event.GetPosPixel()));
    if ((tableCell.nRow != ROW_COL_HEADERS) || (tableCell.nColumn < 0))
        return FunctionResult::SkipFunction;

    // TODO: ensure the column header is rendered in some special way, indicating its current state

    m_nActiveColumn = tableCell.nColumn;
    return FunctionResult::ActivateFunction;
}

FunctionResult ColumnSortHandler::handleMouseUp(TableControl& i_tableControl,
                                                MouseEvent const& i_event)
{
    if (m_nActiveColumn == COL_INVALID)
        return FunctionResult::SkipFunction;

    TableCell const tableCell(i_tableControl.hitTest(i_event.GetPosPixel()));
    if ((tableCell.nRow == ROW_COL_HEADERS) && (tableCell.nColumn == m_nActiveColumn))
    {
        ITableDataSort* pSort = i_tableControl.GetModel()->getSortAdapter();
        ENSURE_OR_RETURN(pSort != nullptr,
                         "ColumnSortHandler::handleMouseUp: somebody is mocking with us!",
                         FunctionResult::DeactivateFunction);
        // in handleMousButtonDown, the model claimed to have sort support ...

        ColumnSortDirection eSortDirection = ColumnSortAscending;
        ColumnSort const aCurrentSort = pSort->getCurrentSortOrder();
        if (aCurrentSort.nColumnPos == m_nActiveColumn)
            // invert existing sort order
            eSortDirection = (aCurrentSort.eSortDirection == ColumnSortAscending)
                                 ? ColumnSortDescending
                                 : ColumnSortAscending;

        pSort->sortByColumn(m_nActiveColumn, eSortDirection);
    }

    m_nActiveColumn = COL_INVALID;
    return FunctionResult::DeactivateFunction;
}

} // namespace svt::table

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