o3de/Gems/LyShine/Code/Editor/CommandHierarchyItemCreateFromData.cpp

/*
 * Copyright (c) Contributors to the Open 3D Engine Project.
 * For complete copyright and license terms please see the LICENSE at the root of this distribution.
 *
 * SPDX-License-Identifier: Apache-2.0 OR MIT
 *
 */
#include "EditorCommon.h"

CommandHierarchyItemCreateFromData::CommandHierarchyItemCreateFromData(UndoStack* stack,
    HierarchyWidget* hierarchy,
    const EntityHelpers::EntityIdList& parents,
    bool createAsChildOfSelection,
    HierarchyHelpers::Creator creator,
    const QString& dataSource)
    : QUndoCommand()
    , m_stack(stack)
    , m_hierarchy(hierarchy)
    , m_parents(parents)
    , m_createAsChildOfSelection(createAsChildOfSelection)
    , m_creator(creator)
    , m_entries()
{
    setText(QString("create element") + (m_parents.empty() ? "" : "s") + QString(" from ") + dataSource);
}

void CommandHierarchyItemCreateFromData::undo()
{
    UndoStackExecutionScope s(m_stack);

    HierarchyHelpers::Delete(m_hierarchy, m_entries);
}

void CommandHierarchyItemCreateFromData::redo()
{
    UndoStackExecutionScope s(m_stack);

    if (m_entries.empty())
    {
        // This is the first call to redo().
        LyShine::EntityArray completeListOfNewlyCreatedTopLevelElements = HierarchyHelpers::CreateItemsAndElements(m_hierarchy,
                m_hierarchy->selectedItems(),
                m_createAsChildOfSelection,
                m_creator);

        // LyShine::EntityArray -> HierarchyItemRawPtrList.
        HierarchyItemRawPtrList items;
        for (auto e : completeListOfNewlyCreatedTopLevelElements)
        {
            items.push_back(HierarchyItem::RttiCast(HierarchyHelpers::ElementToItem(m_hierarchy, e, false)));
        }

        // true: Put the serialized data in m_undoXml.
        HierarchyClipboard::Serialize(m_hierarchy, m_hierarchy->selectedItems(), &items, m_entries, true);
        AZ_Assert(!m_entries.empty(), "Failed to serialize");
    }
    else
    {
        HierarchyHelpers::CreateItemsAndElements(m_hierarchy, m_entries);
    }

    HierarchyHelpers::ExpandParents(m_hierarchy, m_entries);

    m_hierarchy->clearSelection();
    HierarchyHelpers::SetSelectedItems(m_hierarchy, &m_entries);
}

void CommandHierarchyItemCreateFromData::Push(UndoStack* stack,
    HierarchyWidget* hierarchy,
    const QTreeWidgetItemRawPtrQList& selectedItems,
    bool createAsChildOfSelection,
    HierarchyHelpers::Creator creator,
    const QString& dataSource)
{
    if (stack->GetIsExecuting())
    {
        // This is a redundant Qt notification.
        // Nothing else to do.
        return;
    }

    stack->push(new CommandHierarchyItemCreateFromData(stack,
            hierarchy,
            SelectionHelpers::GetSelectedElementIds(hierarchy,
                selectedItems,
                true),
            createAsChildOfSelection,
            creator,
            dataSource));
}