// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
 
//
// Description: Content formatter associated with FlowDocument.
//
 
using System.Windows.Documents;     // ITextPointer
 
namespace MS.Internal.Documents
{
    /// <summary>
    /// Bottomless content formatter associated with FlowDocument.
    /// </summary>
    internal interface IFlowDocumentFormatter
    {
        /// <summary>
        /// Responds to change affecting entire content of associated FlowDocument.
        /// </summary>
        /// <param name="affectsLayout">Whether change affects layout.</param>
        void OnContentInvalidated(bool affectsLayout);
 
        /// <summary>
        /// Responds to change affecting entire content of associated FlowDocument.
        /// </summary>
        /// <param name="affectsLayout">Whether change affects layout.</param>
        /// <param name="start">Start of the affected content range.</param>
        /// <param name="end">End of the affected content range.</param>
        void OnContentInvalidated(bool affectsLayout, ITextPointer start, ITextPointer end);
 
        /// <summary>
        /// Suspend formatting.
        /// </summary>
        void Suspend();
 
        /// <summary>
        /// Is layout data in a valid state.
        /// </summary>
        bool IsLayoutDataValid { get; }
    }
}