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461 lines
20 KiB
461 lines
20 KiB
//C- -*- C++ -*-
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//C- -------------------------------------------------------------------
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//C- DjVuLibre-3.5
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//C- Copyright (c) 2002 Leon Bottou and Yann Le Cun.
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//C- Copyright (c) 2001 AT&T
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//C-
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//C- This software is subject to, and may be distributed under, the
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//C- GNU General Public License, Version 2. The license should have
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//C- accompanied the software or you may obtain a copy of the license
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//C- from the Free Software Foundation at http://www.fsf.org .
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//C-
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//C- This program is distributed in the hope that it will be useful,
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//C- but WITHOUT ANY WARRANTY; without even the implied warranty of
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//C- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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//C- GNU General Public License for more details.
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//C-
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//C- DjVuLibre-3.5 is derived from the DjVu(r) Reference Library
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//C- distributed by Lizardtech Software. On July 19th 2002, Lizardtech
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//C- Software authorized us to replace the original DjVu(r) Reference
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//C- Library notice by the following text (see doc/lizard2002.djvu):
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//C-
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//C- ------------------------------------------------------------------
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//C- | DjVu (r) Reference Library (v. 3.5)
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//C- | Copyright (c) 1999-2001 LizardTech, Inc. All Rights Reserved.
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//C- | The DjVu Reference Library is protected by U.S. Pat. No.
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//C- | 6,058,214 and patents pending.
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//C- |
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//C- | This software is subject to, and may be distributed under, the
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//C- | GNU General Public License, Version 2. The license should have
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//C- | accompanied the software or you may obtain a copy of the license
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//C- | from the Free Software Foundation at http://www.fsf.org .
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//C- |
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//C- | The computer code originally released by LizardTech under this
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//C- | license and unmodified by other parties is deemed "the LIZARDTECH
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//C- | ORIGINAL CODE." Subject to any third party intellectual property
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//C- | claims, LizardTech grants recipient a worldwide, royalty-free,
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//C- | non-exclusive license to make, use, sell, or otherwise dispose of
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//C- | the LIZARDTECH ORIGINAL CODE or of programs derived from the
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//C- | LIZARDTECH ORIGINAL CODE in compliance with the terms of the GNU
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//C- | General Public License. This grant only confers the right to
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//C- | infringe patent claims underlying the LIZARDTECH ORIGINAL CODE to
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//C- | the extent such infringement is reasonably necessary to enable
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//C- | recipient to make, have made, practice, sell, or otherwise dispose
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//C- | of the LIZARDTECH ORIGINAL CODE (or portions thereof) and not to
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//C- | any greater extent that may be necessary to utilize further
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//C- | modifications or combinations.
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//C- |
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//C- | The LIZARDTECH ORIGINAL CODE is provided "AS IS" WITHOUT WARRANTY
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//C- | OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
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//C- | TO ANY WARRANTY OF NON-INFRINGEMENT, OR ANY IMPLIED WARRANTY OF
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//C- | MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
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//C- +------------------------------------------------------------------
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//
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// $Id: DjVuDocEditor.h,v 1.9 2005/05/25 20:24:52 leonb Exp $
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// $Name: release_3_5_15 $
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#ifndef _DJVUDOCEDITOR_H
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#define _DJVUDOCEDITOR_H
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#if NEED_GNUG_PRAGMAS
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# pragma interface
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#endif
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#include "DjVuDocument.h"
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#include "DjVmDoc.h"
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#ifdef HAVE_NAMESPACES
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namespace DJVU {
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# ifdef NOT_DEFINED // Just to fool emacs c++ mode
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}
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#endif
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#endif
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/** @name DjVuDocEditor.h
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Files #"DjVuDocEditor.h"# and #"DjVuDocEditor.cpp"# contain extension
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of \Ref{DjVuDocument} class, which can create and modify existing
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DjVu document, generate thumbnails, etc. It does {\bf not} do
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compression though.
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@memo DjVu document editor class.
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@author Andrei Erofeev <eaf@geocities.com>
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@version #$Id: DjVuDocEditor.h,v 1.9 2005/05/25 20:24:52 leonb Exp $#
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*/
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//@{
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/** #DjVuDocEditor# is an extension of \Ref{DjVuDocument} class with
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additional capabilities for editing the document contents.
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It can be used to:
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\begin{enumerate}
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\item Create (compose) new multipage DjVu documents using single
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page DjVu documents. The class does {\bf not} do compression.
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\item Insert and remove different pages of multipage DjVu documents.
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\item Change attributes ({\em names}, {\em IDs} and {\em titles})
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of files composing the DjVu document.
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\item Generate thumbnail images and integrate them into the document.
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\end{enumerate}
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*/
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class DjVuDocEditor : public DjVuDocument
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{
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public:
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static int thumbnails_per_file;
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protected:
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/// Default constructor
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DjVuDocEditor(void);
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/** Initialization function. Initializes an empty document.
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{\bf Note}: You must call either of the two
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available \Ref{init}() function before you start doing
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anything else with the #DjVuDocEditor#. */
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void init(void);
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/** Initialization function. Opens document with name #filename#.
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{\bf Note}: You must call either of the two
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available \Ref{init}() function before you start doing
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anything else with the #DjVuDocEditor#. */
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void init(const GURL &url);
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public:
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/** Creates a DjVuDocEditor class and initializes with #fname#. */
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static GP<DjVuDocEditor> create_wait(const GURL &url);
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/** Creates a DjVuDocEditor class and initializes an empty document. */
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static GP<DjVuDocEditor> create_wait(void);
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/// Destructor
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virtual ~DjVuDocEditor(void);
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/** Returns type of open document. #DjVuDocEditor# silently
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converts any open DjVu document to #BUNDLED# format (see
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\Ref{DjVuDocument}. Thus, \Ref{DjVuDocument::get_doc_type}()
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will always be returning #BUNDLED#. Use this function to
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learn the original format of the document being edited. */
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int get_orig_doc_type(void) const;
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/** Returns #TRUE# if the document can be "saved" (sometimes
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the only possibility is to do a "save as"). The reason why
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we have this function is that #DjVuDocEditor# can save
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documents in new formats only (#BUNDLED# and #INDIRECT#).
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At the same time it recognizes all DjVu formats (#OLD_BUNDLED#,
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#OLD_INDEXED#, #BUNDLED#, and #INDIRECT#).
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#OLD_BUNDLED# and #BUNDLED# documents occupy only one file,
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so in this case "saving" involves the automatic conversion
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to #BUNDLED# format and storing data into the same file.
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#OLD_INDEXED# documents, on the other hand, occupy more
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than one file. They could be converted to #INDIRECT# format
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if these two formats had the same set of files. Unfortunately,
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these formats are too different, and the best thing to do
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is to use "save as" capability. */
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bool can_be_saved(void) const;
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/** Returns type of the document, which can be created by
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\Ref{save}() function. Can be #INDIRECT#, #BUNDLED#,
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#SINGLE_PAGE#, or #UNKNOWN_TYPE#. The latter indicates,
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that \Ref{save}() will fail, and that \Ref{save_as}()
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should be used instead */
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int get_save_doc_type(void) const;
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/** Saves the document. May generate exception if the document
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can not be saved, and \Ref{save_as}() should be used.
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See \Ref{can_be_saved}() for details. */
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void save(void);
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/** Saves the document. */
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virtual void save_as(const GURL &where, bool bundled);
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/** Saves the document in the {\em new bundled} format. All the data
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is "bundled" into one file and this file is written into the
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passed stream.
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If #force_djvm# is #TRUE# then even one page documents will be
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saved in the #DJVM BUNDLED# format (inside a #FORM:DJVM#);
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{\bf Plugin Warning}. This function will read contents of the whole
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document. Thus, if you call it from the main thread (the thread,
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which transfers data from Netscape), the plugin will block. */
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virtual void write(const GP<ByteStream> &str, bool force_djvm=false);
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/** Always save as bundled, renaming any files conflicting with the
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the names in the supplied GMap. */
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virtual void write(const GP<ByteStream> &str,
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const GMap<GUTF8String,void *> &reserved);
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/** Saves the specified pages in DjVu #BUNDLED# multipage document. */
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void save_pages_as(
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const GP<ByteStream> &str, const GList<int> & page_list);
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/** Translates page number #page_num# to ID. If #page_num# is invalid,
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an exception is thrown. */
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GUTF8String page_to_id(int page_num) const;
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GUTF8String insert_file(const GURL &url, const GUTF8String &tqparent_id,
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int chunk_num=1, DjVuPort *source=0);
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/** Inserts the referenced file into this DjVu document.
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@param fname Name of the top-level file containing the image of
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the page to be inserted. This file must be a DjVu file and
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may include one or more other DjVu files.
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If it include other DjVu files, the function will try to
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insert them into the document too. Should this attempt fail,
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the corresponding #INCL# chunk will be removed from the
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referencing file and an exception will be thrown.
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When inserting a file, the function may modify its name
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to be unique in the DjVu document.
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@param page_num Position where the new page should be inserted at.
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Negative value means "append" */
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void insert_page(const GURL &fname, int page_num=-1);
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/** Inserts a new page with data inside the #data_pool# as page
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number #page_num.
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@param data_pool \Ref{DataPool} with data for this page.
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@param file_name Name, which will be assigned to this page.
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If you try to save the document in #INDIRECT# format,
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a file with this name will be created to hold the
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page's data. If there is already a file in the document
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with the same name, the function will derive a new
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unique name from file_name, which will be assigned
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to the page.
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@param page_num Describes where the page should be inserted.
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Negative number means "append". */
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void insert_page(GP<DataPool> & file_pool,
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const GURL &fname, int page_num=-1);
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/** Inserts a group of pages into this DjVu document.
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Like \Ref{insert_page}() it will insert every page into the document.
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The main advantage of calling this function once for the whole
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group instead of calling \Ref{insert_page}() for every page is
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the processing of included files:
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The group of files may include one or more files, which are thus
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shared by them. If you call \Ref{insert_page}() for every page,
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this shared file will be inserted into the document more than once
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though under different names. This is how \Ref{insert_page}() works:
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whenever it inserts something, it checks for duplicate names with
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only one purpose: invent a new name if a given one is already in
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use.
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On the other hand, if you call #insert_group#(), it will insert
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shared included files only once. This is because it can analyze
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the group of files before inserting them and figure out what files
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are shared and thus should be inserted only once.
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@param fname_list List of top-level files for the pages to be inserted
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@param page_num Position where the new pages should be inserted at.
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Negative value means "append" */
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void insert_group(const GList<GURL> & furl_list, int page_num=-1,
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void (* refresh_cb)(void *)=0, void * cl_data=0);
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/** Removes the specified page from the document. If #remove_unref#
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is #TRUE#, the function will also remove from the document any file,
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which became unreferenced due to the page's removal */
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void remove_page(int page_num, bool remove_unref=true);
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/** Removes the specified pages from the document. If #remove_unref#
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is #TRUE#, the function will also remove from the document any file,
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which became unreferenced due to the pages' removal */
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void remove_pages(const GList<int> & page_list, bool remove_unref=true);
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/** Removes a DjVu file with the specified #id#.
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If some other files include this file, the corresponding #INCL#
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chunks will be removed to avoid dead links.
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If #remove_unref# is #TRUE#, the function will also remove every
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file, which will become unreferenced after the removal of this file. */
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void remove_file(const GUTF8String &id, bool remove_unref=true);
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/** Makes page number #page_num# to be #new_page_num#. If #new_page_num#
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is negative or too big, the function will move page #page_num# to
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the end of the document. */
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void move_page(int page_num, int new_page_num);
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/** Shifts all pags from the #page_list# according to the #shift#.
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The #shift# can be positive (shift toward the end of the document)
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or negative (shift toward the beginning of the document).
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It is OK to make #shift# too big in value. Pages will just be
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moved to the end (or to the beginning, depending on the #shift#
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sign) of the document. */
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void move_pages(const GList<int> & page_list, int shift);
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/** Changes the name of the file with ID #id# to #name#.
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Refer to \Ref{DjVmDir} for the explanation of {\em IDs},
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{\em names} and {\em titles}. */
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void set_file_name(const GUTF8String &id, const GUTF8String &name);
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/** Changes the name of the page #page_num# to #name#.
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Refer to \Ref{DjVmDir} for the explanation of {\em IDs},
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{\em names} and {\em titles}. */
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void set_page_name(int page_num, const GUTF8String &name);
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/** Changes the title of the file with ID #id# to #title#.
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Refer to \Ref{DjVmDir} for the explanation of {\em IDs},
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{\em names} and {\em titles}. */
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void set_file_title(const GUTF8String &id, const GUTF8String &title);
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/** Changes the title of the page #page_num# to #title#.
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Refer to \Ref{DjVmDir} for the explanation of {\em IDs},
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{\em names} and {\em titles}. */
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void set_page_title(int page_num, const GUTF8String &title);
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/** @name Thumbnails */
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//@{
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/** Returns the number of thumbnails stored inside this document.
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It may be #ZERO#, which means, that there are no thumbnails at all.
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It may be equal to the number of pages, which is what should
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normally be.
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Finally, it may be greater than #ZERO# and less than the number
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of pages, in which case thumbnails should be regenerated before
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the document can be saved. */
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int get_thumbnails_num(void) const;
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/** Returns the size of the first encountered thumbnail image. Since
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thumbnails can currently be generated by \Ref{generate_thumbnails}()
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only, all thumbnail images should be of the same size. Thus,
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the number returned is actually the size of {\em all}
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document thumbnails.
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The function will return #-1# if there are no thumbnails. */
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int get_thumbnails_size(void) const;
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/** Removes all thumbnails from the document */
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void remove_thumbnails(void);
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/** Generates thumbnails for the specified page, if and only if
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it does not have a thumbnail yet. If you want to regenerate
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thumbnails for all pages, call \Ref{remove_thumbnails}() prior
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to calling this function.
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@param thumb_size The size of the thumbnails in pixels. DjVu viewer
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is able to rescale the thumbnail images if necessary, so this
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parameter affects thumbnails quality only. 128 is a good number.
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@param page_num The page number to genate the thumbnail for. */
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int generate_thumbnails(int thumb_size, int page_num);
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/** Generates thumbnails for those pages, which do not have them yet.
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If you want to regenerate thumbnails for all pages, call
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\Ref{remove_thumbnails}() prior to calling this function.
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@param thumb_size The size of the thumbnails in pixels. DjVu viewer
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is able to rescale the thumbnail images if necessary, so this
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parameter affects thumbnails quality only. 128 is a good number.
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@param cb The callback, which will be called after thumbnail image
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for the next page has been generated. Regardless of if
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the document already has thumbnail images for some of its
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pages, the callback will be called #pages_num# times, where
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#pages_num# is the total number of pages in the document.
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The callback should return #FALSE# if thumbnails generating
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should proceed. #TRUE# will stop it. */
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void generate_thumbnails(int thumb_size,
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bool (* cb)(int page_num, void *)=0,
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void * cl_data=0);
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//@}
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/** Use this function to simplify annotations in the document.
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The "simplified" format is when annotations are only allowed
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either in top-level page files or in a special file with
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#SHARED_ANNO# flag on. This file is supposed to be included into
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every page. */
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void simplify_anno(void (* progress_cb)(float progress, void *)=0,
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void * cl_data=0);
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/** Will create a file that will be included into every page and
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marked with the #SHARED_ANNO# flag. This file can be used
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to store global annotations (annotations applicable to every page).
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{\bf Note:} There may be only one #SHARED_ANNO# file in any
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DjVu multipage document. */
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void create_shared_anno_file(void (* progress_cb)(float progress, void *)=0,
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void * cl_data=0);
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/** Sets bookmark data */
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void set_djvm_nav(GP<DjVmNav> nav);
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/** Returns a pointer to the file with #SHARED_ANNO# flag on.
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This file should be used for storing document-wide annotations.
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{\bf Note:} There may be only one #SHARED_ANNO# file in any
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DjVu multipage document. */
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GP<DjVuFile> get_shared_anno_file(void);
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GURL get_doc_url(void) const;
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/** Returns TRUE if #class_name# is #"DjVuDocEditor"#,
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#"DjVuDocument"# or #"DjVuPort"# */
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virtual bool inherits(const GUTF8String &class_name) const;
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virtual GP<DataPool> request_data(const DjVuPort * source, const GURL & url);
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protected:
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virtual GP<DjVuFile> url_to_file(const GURL & url, bool dont_create) const;
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virtual GP<DataPool> get_thumbnail(int page_num, bool dont_decode);
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friend class CThumbNails;
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public:
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class File;
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private:
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bool initialized;
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GURL doc_url;
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GP<DataPool> doc_pool;
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GURL tmp_doc_url;
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int orig_doc_type;
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int orig_doc_pages;
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GPMap<GUTF8String, File> files_map; // files_map[id]=GP<File>
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GCriticalSection files_lock;
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GPMap<GUTF8String,DataPool> thumb_map;
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GCriticalSection thumb_lock;
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void (* refresh_cb)(void *);
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void * refresh_cl_data;
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void check(void);
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GUTF8String find_unique_id(GUTF8String id);
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GP<DataPool> strip_incl_chunks(const GP<DataPool> & pool);
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void clean_files_map(void);
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bool insert_file_type(const GURL &file_url,
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DjVmDir::File::FILE_TYPE page_type,
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int & file_pos,
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GMap<GUTF8String, GUTF8String> & name2id);
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bool insert_file( const GP<DataPool> &pool,
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const GURL &file_url, bool is_page,
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int & file_pos,
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GMap<GUTF8String,GUTF8String> & name2id,
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DjVuPort *source=0 );
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bool insert_file(
|
|
const GURL &file_url, bool is_page,
|
|
int & file_pos,
|
|
GMap<GUTF8String,GUTF8String> & name2id,
|
|
DjVuPort *source=0 );
|
|
void remove_file(const GUTF8String &id, bool remove_unref,
|
|
GMap<GUTF8String, void *> & ref_map);
|
|
void generate_ref_map(const GP<DjVuFile> & file,
|
|
GMap<GUTF8String, void *> & ref_map,
|
|
GMap<GURL, void *> & visit_map);
|
|
void move_file(const GUTF8String &id, int & file_pos,
|
|
GMap<GUTF8String, void *> & map);
|
|
void unfile_thumbnails(void);
|
|
void file_thumbnails(void);
|
|
void save_file(const GUTF8String &id, const GURL &codebase,
|
|
const bool only_modified, GMap<GUTF8String, GUTF8String> & map);
|
|
void save_file(const GUTF8String &id, const GURL &codebase,
|
|
GMap<GUTF8String, GUTF8String> & map);
|
|
};
|
|
|
|
//@}
|
|
|
|
|
|
#ifdef HAVE_NAMESPACES
|
|
}
|
|
# ifndef NOT_USING_DJVU_NAMESPACE
|
|
using namespace DJVU;
|
|
# endif
|
|
#endif
|
|
#endif
|
|
|