/* ----------------------------------------------------------------- */
///
/// GetText
///
/// <summary>
/// Gets the metadata corresponding to the specified name.
/// </summary>
///
/* ----------------------------------------------------------------- */
private static string GetText(PdfiumReader core, string name)
{
var size = core.Invoke(e => PdfiumApi.FPDF_GetMetaText(e, name, null, 0));
if (size <= 2)
{
return(string.Empty);
}
var buffer = new byte[size];
core.Invoke(e => PdfiumApi.FPDF_GetMetaText(e, name, buffer, size));
return(Encoding.Unicode.GetString(buffer, 0, (int)(size - 2)));
}
/* ----------------------------------------------------------------- */
///
/// Create
///
/// <summary>
/// Creates a PdfFile object from the specified arguments.
/// </summary>
///
/// <param name="core">PDFium object.</param>
/// <param name="password">Password of the file.</param>
/// <param name="fullaccess">
/// Value indicating whether the loaded PDF document can be fully
/// accessible.
/// </param>
///
/// <returns>PdfFile object.</returns>
///
/* ----------------------------------------------------------------- */
public static PdfFile Create(PdfiumReader core, string password, bool fullaccess)
{
var dest = core.IO.GetPdfFile(core.Source, password);
dest.Count = core.Invoke(NativeMethods.FPDF_GetPageCount);
dest.FullAccess = fullaccess;
return(dest);
}
/* ----------------------------------------------------------------- */
///
/// Create
///
/// <summary>
/// Creates a new instance of the Encryption class with the
/// specified arguments.
/// </summary>
///
/// <param name="core">PDFium object.</param>
/// <param name="password">Password</param>
///
/// <returns>Encryption object.</returns>
///
/// <remarks>
/// 現在 FPDF_GetDocPermissions の結果で諸々の判定を行っているが
/// 最終的には OwnerPassword で開いた状態でもオリジナルの
/// Permission を取得する事を目指す。それに伴って、各種操作も
/// 修正する必要がある。
/// </remarks>
///
/* ----------------------------------------------------------------- */
public static Encryption Create(PdfiumReader core, string password)
{
var method = core.Invoke(e => PdfiumApi.FPDF_GetSecurityHandlerRevision(e));
var permission = (uint)core.Invoke(e => PdfiumApi.FPDF_GetDocPermissions(e));
var restrict = permission != 0xfffffffc;
return(method == -1 ?
new Encryption() :
new Encryption
{
Enabled = true,
OwnerPassword = restrict ? string.Empty : password,
OpenWithPassword = restrict,
UserPassword = restrict ? password : string.Empty,
Method = CreateMethod(method),
Permission = new Permission(permission),
});
}
/* ----------------------------------------------------------------- */
///
/// Create
///
/// <summary>
/// Creates a new instance of the Metadata class with the core
/// object.
/// </summary>
///
/// <param name="core">PDFium object.</param>
///
/// <returns>Metadata object.</returns>
///
/* ----------------------------------------------------------------- */
public static Metadata Create(PdfiumReader core) => core.Invoke(e => new Metadata
{
Version = GetVersion(e),
Title = GetText(e, nameof(Metadata.Title)),
Author = GetText(e, nameof(Metadata.Author)),
Subject = GetText(e, nameof(Metadata.Subject)),
Keywords = GetText(e, nameof(Metadata.Keywords)),
Creator = GetText(e, nameof(Metadata.Creator)),
Producer = GetText(e, nameof(Metadata.Producer)),
Options = GetPageMode(e),
});
/* ----------------------------------------------------------------- */
///
/// Create
///
/// <summary>
/// Creates a new instance of the Encryption class with the
/// specified arguments.
/// </summary>
///
/// <param name="core">PDFium object.</param>
/// <param name="password">Password</param>
///
/// <returns>Encryption object.</returns>
///
/// <remarks>
/// 現在 FPDF_GetDocPermissions の結果で諸々の判定を行っているが
/// 最終的には OwnerPassword で開いた状態でもオリジナルの
/// Permission を取得する事を目指す。それに伴って、各種操作も
/// 修正する必要がある。
/// </remarks>
///
/* ----------------------------------------------------------------- */
public static Encryption Create(PdfiumReader core, string password) => core.Invoke(e =>
{
var method = NativeMethods.FPDF_GetSecurityHandlerRevision(e);
var value = (uint)NativeMethods.FPDF_GetDocPermissions(e);
var mask = 0xfffffffc;
var limited = (value & mask) != mask;
core.LogDebug($"Permission:0x{value:X}", $"Revision:{method}");
return(method == -1 ?
new Encryption() :
new Encryption
{
Enabled = true,
OwnerPassword = limited ? string.Empty : password,
OpenWithPassword = limited,
UserPassword = limited ? password : string.Empty,
Method = CreateMethod(method),
Permission = new Permission(value),
});
});
/* ----------------------------------------------------------------- */
///
/// Render
///
/// <summary>
/// Executes the rendering with the specified arguments.
/// </summary>
///
/// <param name="src">PDFium object.</param>
/// <param name="dest">Graphics to be rendered.</param>
/// <param name="page">Page object.</param>
/// <param name="point">Starting point.</param>
/// <param name="size">Drawing size.</param>
/// <param name="flags">Drawing flags.</param>
///
/* ----------------------------------------------------------------- */
public static void Render(this PdfiumReader src, Graphics dest, Page page,
PointF point, SizeF size, int flags) =>
src.Invoke(e => Render(e, dest, page, point, size, flags));
