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iText, a free Java-PDF library
/*
* $Id: PdfViewerPreferencesImp.java 3402 2008-05-19 17:19:27Z blowagie $
*
* Copyright 2006 Bruno Lowagie
*
* The contents of this file are subject to the Mozilla Public License Version 1.1
* (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.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the License.
*
* The Original Code is 'iText, a free JAVA-PDF library'.
*
* The Initial Developer of the Original Code is Bruno Lowagie. Portions created by
* the Initial Developer are Copyright (C) 1999, 2000, 2001, 2002 by Bruno Lowagie.
* All Rights Reserved.
* Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
* are Copyright (C) 2000, 2001, 2002 by Paulo Soares. All Rights Reserved.
*
* Contributor(s): all the names of the contributors are added in the source code
* where applicable.
*
* Alternatively, the contents of this file may be used under the terms of the
* LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the
* provisions of LGPL are applicable instead of those above. If you wish to
* allow use of your version of this file only under the terms of the LGPL
* License and not to allow others to use your version of this file under
* the MPL, indicate your decision by deleting the provisions above and
* replace them with the notice and other provisions required by the LGPL.
* If you do not delete the provisions above, a recipient may use your version
* of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE.
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the MPL as stated above or under the terms of the GNU
* Library General Public License as published by the Free Software Foundation;
* either version 2 of the License, or any later version.
*
* This library is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU Library general Public License for more
* details.
*
* If you didn't download this code from the following link, you should check if
* you aren't using an obsolete version:
* http://www.lowagie.com/iText/
*/
package com.lowagie.text.pdf.internal;
import com.lowagie.text.pdf.PdfArray;
import com.lowagie.text.pdf.PdfBoolean;
import com.lowagie.text.pdf.PdfDictionary;
import com.lowagie.text.pdf.PdfName;
import com.lowagie.text.pdf.PdfNumber;
import com.lowagie.text.pdf.PdfObject;
import com.lowagie.text.pdf.PdfReader;
import com.lowagie.text.pdf.PdfWriter;
import com.lowagie.text.pdf.interfaces.PdfViewerPreferences;
/**
* Stores the information concerning viewer preferences,
* and contains the business logic that allows you to set viewer preferences.
*/
public class PdfViewerPreferencesImp implements PdfViewerPreferences {
public static final PdfName[] VIEWER_PREFERENCES = {
PdfName.HIDETOOLBAR, // 0
PdfName.HIDEMENUBAR, // 1
PdfName.HIDEWINDOWUI, // 2
PdfName.FITWINDOW, // 3
PdfName.CENTERWINDOW, // 4
PdfName.DISPLAYDOCTITLE, // 5
PdfName.NONFULLSCREENPAGEMODE, // 6
PdfName.DIRECTION, // 7
PdfName.VIEWAREA, // 8
PdfName.VIEWCLIP, // 9
PdfName.PRINTAREA, // 10
PdfName.PRINTCLIP, // 11
PdfName.PRINTSCALING, // 12
PdfName.DUPLEX, // 13
PdfName.PICKTRAYBYPDFSIZE, // 14
PdfName.PRINTPAGERANGE, // 15
PdfName.NUMCOPIES // 16
};
/** A series of viewer preferences. */
public static final PdfName NONFULLSCREENPAGEMODE_PREFERENCES[] = {
PdfName.USENONE, PdfName.USEOUTLINES, PdfName.USETHUMBS, PdfName.USEOC
};
/** A series of viewer preferences. */
public static final PdfName DIRECTION_PREFERENCES[] = {
PdfName.L2R, PdfName.R2L
};
/** A series of viewer preferences. */
public static final PdfName PAGE_BOUNDARIES[] = {
PdfName.MEDIABOX, PdfName.CROPBOX, PdfName.BLEEDBOX, PdfName.TRIMBOX, PdfName.ARTBOX
};
/** A series of viewer preferences */
public static final PdfName PRINTSCALING_PREFERENCES[] = {
PdfName.APPDEFAULT, PdfName.NONE
};
/** A series of viewer preferences. */
public static final PdfName DUPLEX_PREFERENCES[] = {
PdfName.SIMPLEX, PdfName.DUPLEXFLIPSHORTEDGE, PdfName.DUPLEXFLIPLONGEDGE
};
/** This value will hold the viewer preferences for the page layout and page mode. */
private int pageLayoutAndMode = 0;
/** This dictionary holds the viewer preferences (other than page layout and page mode). */
private PdfDictionary viewerPreferences = new PdfDictionary();
/** The mask to decide if a ViewerPreferences dictionary is needed */
private static final int viewerPreferencesMask = 0xfff000;
/**
* Returns the page layout and page mode value.
*/
public int getPageLayoutAndMode() {
return pageLayoutAndMode;
}
/**
* Returns the viewer preferences.
*/
public PdfDictionary getViewerPreferences() {
return viewerPreferences;
}
/**
* Sets the viewer preferences as the sum of several constants.
*
* @param preferences
* the viewer preferences
* @see PdfViewerPreferences#setViewerPreferences
*/
public void setViewerPreferences(int preferences) {
this.pageLayoutAndMode |= preferences;
// for backwards compatibility, it is also possible
// to set the following viewer preferences with this method:
if ((preferences & viewerPreferencesMask) != 0) {
pageLayoutAndMode = ~viewerPreferencesMask & pageLayoutAndMode;
if ((preferences & PdfWriter.HideToolbar) != 0)
viewerPreferences.put(PdfName.HIDETOOLBAR, PdfBoolean.PDFTRUE);
if ((preferences & PdfWriter.HideMenubar) != 0)
viewerPreferences.put(PdfName.HIDEMENUBAR, PdfBoolean.PDFTRUE);
if ((preferences & PdfWriter.HideWindowUI) != 0)
viewerPreferences.put(PdfName.HIDEWINDOWUI, PdfBoolean.PDFTRUE);
if ((preferences & PdfWriter.FitWindow) != 0)
viewerPreferences.put(PdfName.FITWINDOW, PdfBoolean.PDFTRUE);
if ((preferences & PdfWriter.CenterWindow) != 0)
viewerPreferences.put(PdfName.CENTERWINDOW, PdfBoolean.PDFTRUE);
if ((preferences & PdfWriter.DisplayDocTitle) != 0)
viewerPreferences.put(PdfName.DISPLAYDOCTITLE, PdfBoolean.PDFTRUE);
if ((preferences & PdfWriter.NonFullScreenPageModeUseNone) != 0)
viewerPreferences.put(PdfName.NONFULLSCREENPAGEMODE, PdfName.USENONE);
else if ((preferences & PdfWriter.NonFullScreenPageModeUseOutlines) != 0)
viewerPreferences.put(PdfName.NONFULLSCREENPAGEMODE, PdfName.USEOUTLINES);
else if ((preferences & PdfWriter.NonFullScreenPageModeUseThumbs) != 0)
viewerPreferences.put(PdfName.NONFULLSCREENPAGEMODE, PdfName.USETHUMBS);
else if ((preferences & PdfWriter.NonFullScreenPageModeUseOC) != 0)
viewerPreferences.put(PdfName.NONFULLSCREENPAGEMODE, PdfName.USEOC);
if ((preferences & PdfWriter.DirectionL2R) != 0)
viewerPreferences.put(PdfName.DIRECTION, PdfName.L2R);
else if ((preferences & PdfWriter.DirectionR2L) != 0)
viewerPreferences.put(PdfName.DIRECTION, PdfName.R2L);
if ((preferences & PdfWriter.PrintScalingNone) != 0)
viewerPreferences.put(PdfName.PRINTSCALING, PdfName.NONE);
}
}
/**
* Given a key for a viewer preference (a PdfName object),
* this method returns the index in the VIEWER_PREFERENCES array.
* @param key a PdfName referring to a viewer preference
* @return an index in the VIEWER_PREFERENCES array
*/
private int getIndex(PdfName key) {
for (int i = 0; i < VIEWER_PREFERENCES.length; i++) {
if (VIEWER_PREFERENCES[i].equals(key))
return i;
}
return -1;
}
/**
* Checks if some value is valid for a certain key.
*/
private boolean isPossibleValue(PdfName value, PdfName[] accepted) {
for (int i = 0; i < accepted.length; i++) {
if (accepted[i].equals(value)) {
return true;
}
}
return false;
}
/**
* Sets the viewer preferences for printing.
*/
public void addViewerPreference(PdfName key, PdfObject value) {
switch(getIndex(key)) {
case 0: // HIDETOOLBAR
case 1: // HIDEMENUBAR
case 2: // HIDEWINDOWUI
case 3: // FITWINDOW
case 4: // CENTERWINDOW
case 5: // DISPLAYDOCTITLE
case 14: // PICKTRAYBYPDFSIZE
if (value instanceof PdfBoolean) {
viewerPreferences.put(key, value);
}
break;
case 6: // NONFULLSCREENPAGEMODE
if (value instanceof PdfName
&& isPossibleValue((PdfName)value, NONFULLSCREENPAGEMODE_PREFERENCES)) {
viewerPreferences.put(key, value);
}
break;
case 7: // DIRECTION
if (value instanceof PdfName
&& isPossibleValue((PdfName)value, DIRECTION_PREFERENCES)) {
viewerPreferences.put(key, value);
}
break;
case 8: // VIEWAREA
case 9: // VIEWCLIP
case 10: // PRINTAREA
case 11: // PRINTCLIP
if (value instanceof PdfName
&& isPossibleValue((PdfName)value, PAGE_BOUNDARIES)) {
viewerPreferences.put(key, value);
}
break;
case 12: // PRINTSCALING
if (value instanceof PdfName
&& isPossibleValue((PdfName)value, PRINTSCALING_PREFERENCES)) {
viewerPreferences.put(key, value);
}
break;
case 13: // DUPLEX
if (value instanceof PdfName
&& isPossibleValue((PdfName)value, DUPLEX_PREFERENCES)) {
viewerPreferences.put(key, value);
}
break;
case 15: // PRINTPAGERANGE
if (value instanceof PdfArray) {
viewerPreferences.put(key, value);
}
break;
case 16: // NUMCOPIES
if (value instanceof PdfNumber) {
viewerPreferences.put(key, value);
}
break;
}
}
/**
* Adds the viewer preferences defined in the preferences parameter to a
* PdfDictionary (more specifically the root or catalog of a PDF file).
*
* @param catalog
*/
public void addToCatalog(PdfDictionary catalog) {
// Page Layout
catalog.remove(PdfName.PAGELAYOUT);
if ((pageLayoutAndMode & PdfWriter.PageLayoutSinglePage) != 0)
catalog.put(PdfName.PAGELAYOUT, PdfName.SINGLEPAGE);
else if ((pageLayoutAndMode & PdfWriter.PageLayoutOneColumn) != 0)
catalog.put(PdfName.PAGELAYOUT, PdfName.ONECOLUMN);
else if ((pageLayoutAndMode & PdfWriter.PageLayoutTwoColumnLeft) != 0)
catalog.put(PdfName.PAGELAYOUT, PdfName.TWOCOLUMNLEFT);
else if ((pageLayoutAndMode & PdfWriter.PageLayoutTwoColumnRight) != 0)
catalog.put(PdfName.PAGELAYOUT, PdfName.TWOCOLUMNRIGHT);
else if ((pageLayoutAndMode & PdfWriter.PageLayoutTwoPageLeft) != 0)
catalog.put(PdfName.PAGELAYOUT, PdfName.TWOPAGELEFT);
else if ((pageLayoutAndMode & PdfWriter.PageLayoutTwoPageRight) != 0)
catalog.put(PdfName.PAGELAYOUT, PdfName.TWOPAGERIGHT);
// Page Mode
catalog.remove(PdfName.PAGEMODE);
if ((pageLayoutAndMode & PdfWriter.PageModeUseNone) != 0)
catalog.put(PdfName.PAGEMODE, PdfName.USENONE);
else if ((pageLayoutAndMode & PdfWriter.PageModeUseOutlines) != 0)
catalog.put(PdfName.PAGEMODE, PdfName.USEOUTLINES);
else if ((pageLayoutAndMode & PdfWriter.PageModeUseThumbs) != 0)
catalog.put(PdfName.PAGEMODE, PdfName.USETHUMBS);
else if ((pageLayoutAndMode & PdfWriter.PageModeFullScreen) != 0)
catalog.put(PdfName.PAGEMODE, PdfName.FULLSCREEN);
else if ((pageLayoutAndMode & PdfWriter.PageModeUseOC) != 0)
catalog.put(PdfName.PAGEMODE, PdfName.USEOC);
else if ((pageLayoutAndMode & PdfWriter.PageModeUseAttachments) != 0)
catalog.put(PdfName.PAGEMODE, PdfName.USEATTACHMENTS);
// viewer preferences (Table 8.1 of the PDF Reference)
catalog.remove(PdfName.VIEWERPREFERENCES);
if (viewerPreferences.size() > 0) {
catalog.put(PdfName.VIEWERPREFERENCES, viewerPreferences);
}
}
public static PdfViewerPreferencesImp getViewerPreferences(PdfDictionary catalog) {
PdfViewerPreferencesImp preferences = new PdfViewerPreferencesImp();
int prefs = 0;
PdfName name = null;
// page layout
PdfObject obj = PdfReader.getPdfObjectRelease(catalog.get(PdfName.PAGELAYOUT));
if (obj != null && obj.isName()) {
name = (PdfName) obj;
if (name.equals(PdfName.SINGLEPAGE))
prefs |= PdfWriter.PageLayoutSinglePage;
else if (name.equals(PdfName.ONECOLUMN))
prefs |= PdfWriter.PageLayoutOneColumn;
else if (name.equals(PdfName.TWOCOLUMNLEFT))
prefs |= PdfWriter.PageLayoutTwoColumnLeft;
else if (name.equals(PdfName.TWOCOLUMNRIGHT))
prefs |= PdfWriter.PageLayoutTwoColumnRight;
else if (name.equals(PdfName.TWOPAGELEFT))
prefs |= PdfWriter.PageLayoutTwoPageLeft;
else if (name.equals(PdfName.TWOPAGERIGHT))
prefs |= PdfWriter.PageLayoutTwoPageRight;
}
// page mode
obj = PdfReader.getPdfObjectRelease(catalog.get(PdfName.PAGEMODE));
if (obj != null && obj.isName()) {
name = (PdfName) obj;
if (name.equals(PdfName.USENONE))
prefs |= PdfWriter.PageModeUseNone;
else if (name.equals(PdfName.USEOUTLINES))
prefs |= PdfWriter.PageModeUseOutlines;
else if (name.equals(PdfName.USETHUMBS))
prefs |= PdfWriter.PageModeUseThumbs;
else if (name.equals(PdfName.USEOC))
prefs |= PdfWriter.PageModeUseOC;
else if (name.equals(PdfName.USEATTACHMENTS))
prefs |= PdfWriter.PageModeUseAttachments;
}
// set page layout and page mode preferences
preferences.setViewerPreferences(prefs);
// other preferences
obj = PdfReader.getPdfObjectRelease(catalog
.get(PdfName.VIEWERPREFERENCES));
if (obj != null && obj.isDictionary()) {
PdfDictionary vp = (PdfDictionary) obj;
for (int i = 0; i < VIEWER_PREFERENCES.length; i++) {
obj = PdfReader.getPdfObjectRelease(vp.get(VIEWER_PREFERENCES[i]));
preferences.addViewerPreference(VIEWER_PREFERENCES[i], obj);
}
}
return preferences;
}
}