org.jpedal.objects.acroforms.overridingImplementations.ReadOnlyTextIcon Maven / Gradle / Ivy
/*
* ===========================================
* Java Pdf Extraction Decoding Access Library
* ===========================================
*
* Project Info: http://www.idrsolutions.com
* Help section for developers at http://www.idrsolutions.com/support/
*
* (C) Copyright 1997-2017 IDRsolutions and Contributors.
*
* This file is part of JPedal/JPDF2HTML5
*
@LICENSE@
*
* ---------------
* ReadOnlyTextIcon.java
* ---------------
*/
package org.jpedal.objects.acroforms.overridingImplementations;
import java.awt.*;
import java.awt.geom.Rectangle2D;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.util.StringTokenizer;
import javax.swing.JTextField;
import javax.swing.SwingConstants;
import org.jpedal.io.PdfObjectReader;
import org.jpedal.objects.acroforms.GUIData;
import org.jpedal.objects.raw.*;
import org.jpedal.utils.LogWriter;
import org.jpedal.utils.StringUtils;
/**
* this class is used to display the text fields in the defined font, but is used for readonly fields only.
*/
public class ReadOnlyTextIcon extends CustomImageIcon implements SwingConstants {
/**
* used to tell the paint method that we need to scale up the image for printing
*/
private boolean currentlyPrinting;
private int printMultiplier = 1;
private int alignment = -1;
private static final long serialVersionUID = 8946195842453749725L;
/**
* stores the root image for selected and unselected icons
*/
private BufferedImage rootImage;
/**
* stores the final image after any icon rotation
*/
private BufferedImage finalImage;
private PdfObject fakeObj;
/**
* tells us if the text for this icon has chnaged and so if we need to redraw the icon
*/
private boolean textChanged;
private String preFontStream = "", betweenFontAndTextStream = "", afterTextStream = "", text = "";
private String fontName = "", fontSize = "12", fontCommand = "";
/**
* our full command Stream
*/
private String fullCommandString;
private final PdfObjectReader currentpdffile;
private int subtype = -1;
private final PdfObject resources;
private final PdfObject form;
/**
* new code to store the data to create the image when needed to the size needed
* offset = if 0 no change, 1 offset image, 2 invert image
*
NOTE if decipherAppObject ios not called this will cause problems.
*/
public ReadOnlyTextIcon(final PdfObject form, final int iconRot, final PdfObjectReader pdfObjectReader, final PdfObject res) {
super(iconRot);
this.form = form;
currentpdffile = pdfObjectReader;
resources = res;
// if(selObj.getObjectRefAsString().equals("128 0 R") || selObj.getObjectRefAsString().equals("130 0 R"))
// debug = true;
}
/**
* returns the currently selected Image
*/
@Override
public Image getImage() {
final Image image;
checkAndCreateimage();
image = finalImage;
return image;
}
/**
* draws the form to a BufferedImage the size of the Icon and returns it,
* uses the paintIcon method for the drawing so future changes should only be in one place
*/
public BufferedImage drawToBufferedImage() {
final BufferedImage bufImg = new BufferedImage(getIconWidth(), getIconHeight(), BufferedImage.TYPE_INT_ARGB);
final Graphics g = bufImg.getGraphics();
paintIcon(null, g, 0, 0);
g.dispose();
return bufImg;
}
@Override
public synchronized void paintIcon(final Component c, final Graphics g, final int x, final int y) {
final BufferedImage image = (BufferedImage) getImage();
if (image == null) {
return;
}
if (c != null && c.isEnabled()) {
g.setColor(c.getBackground());
} else {
g.setColor(Color.gray);
}
final Graphics2D g2 = (Graphics2D) g;
if (iconWidth > 0 && iconHeight > 0) {
int drawWidth = iconWidth;
int drawHeight = iconHeight;
if (displaySingle && (iconRotation == 270 || iconRotation == 90)) {
//swap width and height so that the image is drawn in the corect orientation
//without changing the raw width and height for the icon size
drawWidth = iconHeight;
drawHeight = iconWidth;
}
//only work out scaling if we have a dictionary of an image, as otherwise it could be a blank image (i.e. 1 x 1).
if (currentpdffile != null) {
//work out w,h which we want to draw inside our icon to maintain aspect ratio.
final float ws = drawWidth / (float) image.getWidth(null);
final float hs = drawHeight / (float) image.getHeight(null);
if (ws < hs) {
drawWidth = (int) (ws * image.getWidth(null));
drawHeight = (int) (ws * image.getHeight(null));
} else {
drawWidth = (int) (hs * image.getWidth(null));
drawHeight = (int) (hs * image.getHeight(null));
}
}
//now work out the x,y position to keep the icon in the centre of the icon
int posX = 0, posY = 0;
if (currentpdffile != null) {
if (displaySingle && (iconRotation == 270 || iconRotation == 90)) {
posX = (iconHeight - drawWidth) / 2;
posY = (iconWidth - drawHeight) / 2;
} else {
posX = (iconWidth - drawWidth) / 2;
posY = (iconHeight - drawHeight) / 2;
}
}
if (alignment == JTextField.LEFT) {
posX = 0;
}
final int finalRotation;
if (displaySingle) {
finalRotation = validateRotationValue(pageRotate - iconRotation);
} else {
finalRotation = pageRotate;
}
/* with new decode at needed size code the resize (drawImage) may not be needed. */
switch (finalRotation) {
case 270:
g2.rotate(-Math.PI / 2);
g2.translate(-drawWidth, 0);
g2.drawImage(image, -posX, posY, drawWidth, drawHeight, null);
break;
case 90:
g2.rotate(Math.PI / 2);
g2.translate(0, -drawHeight);
g2.drawImage(image, posX, -posY, drawWidth, drawHeight, null);
break;
case 180:
g2.rotate(Math.PI);
g2.translate(-drawWidth, -drawHeight);
g2.drawImage(image, -posX, -posY, drawWidth, drawHeight, null);
break;
default:
g2.drawImage(image, posX, posY, drawWidth, drawHeight, null);
break;
}
} else {
g2.drawImage(image, 0, 0, null);
}
g2.translate(-x, -y);
}
private void checkAndCreateimage() {
//check if pdf object reader is defined, as we still use opaque images which do NOT need redecoding
if (currentpdffile == null) {
return;
}
/* NOTE the image code may need changing so that we store up to a certain size image
* and not store large images, once the user has rescaled to a more normal size.
* we could store the root width and height for the 100% size and use 200% as the
* highest image size to keep.
*
* if we do this the best way would be to have an object that we move the decode routine to, and
* then when we read the 100% values from the image object we can store them in that size.
*/
//define normal sizes for normal use
int newWidth = iconWidth, newHeight = iconHeight;
//if printing define larger sizes for root image, but dont change icon height and width
if (currentlyPrinting) {
newWidth = iconWidth * printMultiplier;
newHeight = iconHeight * printMultiplier;
}
//decode images at needed size
if (textChanged || rootImage == null
|| newWidth > (rootImage.getWidth(null))
|| newHeight > (rootImage.getHeight(null))
|| newWidth < (rootImage.getWidth(null) / MAXSCALEFACTOR)
|| newHeight < (rootImage.getHeight(null) / MAXSCALEFACTOR)) {
//System.out.println(fakeObj.getObjectRefAsString()+" command="+fullCommandString);
rootImage = FormStream.decode(form, currentpdffile, fakeObj, subtype, newWidth, newHeight, 0, 1);
finalImage = FormStream.rotate(rootImage, iconRotation);
//make text as redrawn
textChanged = false;
} //icon rotation is always defined in the constructor so we dont need to change it
}
public void setText(String str) {
if (str == null) {
str = "";
}
if (str.equals(text)) {
return;
}
textChanged = true;
this.text = str;
//check afterTextStream to try and sto duplicate TJs with same wording
final PdfObject xobj = new PdfObject("1 10 X");
while (true) {
xobj.setDecodedStream(StringUtils.toBytes(afterTextStream));
final String tj = FormStream.decipherTextFromAP(currentpdffile, xobj);
if (tj != null && text.contains(tj)) {
final int endOfTj = afterTextStream.indexOf(" Tj", afterTextStream.indexOf(tj)) + 3;
afterTextStream = afterTextStream.substring(endOfTj);
if (afterTextStream.isEmpty()) {
break;
}
} else {
break;
}
}
try {
if (text.contains("\n")) { //multiline text
final StringTokenizer lines = new StringTokenizer(text, "\n", false);
String nextLine;
//Add 2 to simulate form padding
String textAlignment;
int alignmentX = 2;
int alignmentY = ((FormObject) form).getBoundingRectangle().height;
textAlignment = " " + alignmentX + ' ' + alignmentY + " Td ";
this.fullCommandString = preFontStream + fontName + fontSize + fontCommand +
betweenFontAndTextStream + textAlignment;
// int y = ((FormObject)form).getBoundingRectangle().height;
int xPoint = 0;
while (lines.hasMoreTokens()) {
nextLine = lines.nextToken();
final FontMetrics fm = new Canvas().getFontMetrics(new Font(fontName, Font.PLAIN, (int) Float.parseFloat(fontSize)));
final Rectangle2D r = fm.getStringBounds(nextLine, null);
if (((FormObject) form).getAlignment() != -1) {
switch (((FormObject) form).getAlignment()) {
case SwingConstants.LEFT:
alignmentX = 0;
break;
case SwingConstants.CENTER:
alignmentX = ((int) (((FormObject) form).getBoundingRectangle().width - r.getWidth())) / 2;
alignmentX -= xPoint;
break;
case SwingConstants.RIGHT:
alignmentX = ((int) (((FormObject) form).getBoundingRectangle().width - r.getWidth()));
alignmentX -= xPoint;
break;
}
}
alignmentY = (int) -(r.getHeight() + 2);
//Construction alignment string
textAlignment = " " + alignmentX + ' ' + alignmentY + " Td ";
this.fullCommandString += textAlignment + '(' + nextLine + ")Tj ";
xPoint += alignmentX;
}
this.fullCommandString += afterTextStream;
} else {
//Add 2 to simulate form padding
int alignmentX = 2;
int alignmentY = ((int) (((FormObject) form).getBoundingRectangle().height - Float.parseFloat(fontSize))) + 2;
if (form.getParameterConstant(PdfDictionary.Subtype) != PdfDictionary.FreeText) {
alignmentY = ((int) (((FormObject) form).getBoundingRectangle().height - Float.parseFloat(fontSize))) / 2;
if (alignmentY < 2) {
alignmentY = 2;
}
if (((FormObject) form).getAlignment() != SwingConstants.LEFT) {
final FontMetrics fm = new Canvas().getFontMetrics(new Font(fontName, Font.PLAIN, (int) Float.parseFloat(fontSize)));
final Rectangle2D r = fm.getStringBounds(text, null);
switch (((FormObject) form).getAlignment()) {
case SwingConstants.CENTER:
alignmentX = ((int) (((FormObject) form).getBoundingRectangle().width - r.getWidth())) / 2;
break;
case SwingConstants.RIGHT:
alignmentX = ((int) (((FormObject) form).getBoundingRectangle().width - r.getWidth())) - 2;
break;
}
}
}
//Construction alignment string
final String textAlignment = alignmentX + " " + alignmentY + " Td ";
this.fullCommandString = preFontStream + fontName + fontSize + fontCommand +
betweenFontAndTextStream + textAlignment + '(' + text + ")Tj " + afterTextStream;
}
Color BG = null;
// Color BC = new Color(0, 0, 0, 0);
if (form.getDictionary(PdfDictionary.MK) != null) {
final PdfObject MK = form.getDictionary(PdfDictionary.MK);
// float[] bc = MK.getFloatArray(PdfDictionary.BC);
final float[] bg = MK.getFloatArray(PdfDictionary.BG);
/*
* Some files do not store colour values between 0 and 1.
* Catch these and convert them
*/
//Check BG values
if (bg != null) {
boolean colorOutOfBounds = false;
for (int i = 0; i != bg.length; i++) {
if (bg[i] > 1.0f) {
colorOutOfBounds = true;
break;
}
}
if (colorOutOfBounds) {
for (int i = 0; i != bg.length; i++) {
if (bg[i] > 1.0f) {
bg[i] /= 255;
}
}
}
}
//Check BC values
// if(bc!=null){
// boolean colorOutOfBounds = false;
// for(int i=0; i!=bc.length; i++){
// if(bc[i]>1.0f){
// colorOutOfBounds = true;
// break;
// }
// }
// if(colorOutOfBounds){
// for(int i=0; i!=bc.length; i++){
// if(bg[i]>1.0f)
// bc[i] = bc[i]/255;
// }
// }
// }
//
//
// if(bc != null && bc.length>0){
// switch(bc.length){
// case 1 :
// BC = new Color(bc[0],bc[0],bc[0],1.0f);
// break;
// case 3 :
// BC = new Color(bc[0],bc[1],bc[2],1.0f);
// break;
// case 4 :
//// BC = new Color(bc[0],bc[0],bc[0],1.0f);
// break;
// }
// }
if (bg != null && bg.length > 0) {
switch (bg.length) {
case 1:
BG = new Color(bg[0], bg[0], bg[0], 1.0f);
break;
case 3:
BG = new Color(bg[0], bg[1], bg[2], 1.0f);
break;
case 4:
// BG = new Color(bg[0],bg[0],bg[0],1.0f);
break;
}
}
}
//Fill Background if set
if (BG != null) {
this.fullCommandString = BG.getRed() + " " + BG.getGreen() + ' ' + BG.getBlue() + " rg 0 0 " + (((FormObject) form).getBoundingRectangle().width - 3) + ' ' + (((FormObject) form).getBoundingRectangle().height - 3) + " re f " + fullCommandString;
}
//we may need to actually check encoding on font here rather than assume win
fakeObj.setDecodedStream(fullCommandString.getBytes("Cp1252"));
} catch (final IOException e) {
LogWriter.writeLog("Exception: " + e.getMessage());
}
}
/**
* decodes and saves all information needed to decode the object on the fly,
* the test and font can be altered with specific methods.
*
* @return boolean true if it all worked.
*/
public boolean decipherAppObject(final FormObject form) {
//read the command from file if there is one
String fontStr = "";
final PdfObject appObj = form.getDictionary(PdfDictionary.AP).getDictionary(PdfDictionary.N);
if (appObj != null) {
final byte[] bytes = appObj.getDecodedStream();
if (bytes != null) {
int startTf = -1;
int endTf = -1;
int startTj;
int endTj = -1;
final int end = bytes.length;
//find index of Tf command
for (int i = 0; i < end - 1; i++) {
if ((((char) bytes[i]) == 'T' && ((char) bytes[i + 1]) == 'f') &&
(i + 2 >= end || bytes[i + 2] == 10 || bytes[i + 2] == 13 || bytes[i + 2] == ' ')) {
endTf = i + 2;
break;
}
}
if (endTf == -1) {
startTf = 0;
endTf = 0;
} else {
//find beginning of Tf command
// int strs = 0;
// boolean strFound = false;
for (int i = endTf - 3; i > startTf; i--) {
//this is kept until its passed tests.
// if(bytes[i]==' ' || bytes[i]==10 || bytes[i]==13){
// if(strFound){
// strs++;
// if(strs==2){
// startTj = i+1; //to allow for the gap
// //should give the same index as the '/'
// break;
// }
// }
// continue;
// }else
if (bytes[i] == '/') {
startTf = i;
break;
// }else {
// strFound = true;
}
}
//******startTf and endTf should both have a value, and start should be before end******
}
//find index of Tj command
for (int i = endTf; i < end - 1; i++) {
if ((((char) bytes[i]) == 'T' && ((char) bytes[i + 1]) == 'j') &&
(i + 2 >= end || bytes[i + 2] == 10 || bytes[i + 2] == 13 || bytes[i + 2] == ' ')) {
endTj = i + 2;
break;
}
}
if (endTj == -1) {
startTj = endTf;
endTj = endTf;
} else {
startTj = endTf;
//find the start of the Tj command
int brackets = 0;
boolean strFound = false;
OUTER:
for (int i = endTj - 3; i > startTj; i--) {
switch (bytes[i]) {
case ' ':
case 10:
case 13:
if (strFound && brackets == 0) {
//+1 as we dont want the gap we just found in our text string
startTj = i + 1;
break OUTER;
}
break;
case ')':
brackets++;
break;
case '(':
brackets--;
if (brackets == 0 && strFound) {
startTj = i;
break OUTER;
}
break;
default:
strFound = true;
break;
}
}
}
//find actual end of Tf including any rg or g command after the Tf.
for (int i = endTf; i < startTj; i++) {
if (bytes[i] == ' ' || bytes[i] == 10 || bytes[i] == 13) {
} else if (bytes[i] > 47 && bytes[i] < 58) {
//number
} else {
if (bytes[i] == 'g' && i + 1 < startTj && (bytes[i + 1] == ' ' || bytes[i + 1] == 10 || bytes[i + 1] == 13)) {
endTf = i + 1;
break;
} else if (bytes[i] == 'r' && i + 2 < startTj && bytes[i + 1] == 'g' && (bytes[i + 2] == ' ' || bytes[i + 2] == 10 || bytes[i + 2] == 13)) {
endTf = i + 2;
break;
} else {
//not what we want leave endTf as is.
break;
}
}
}
if (endTj != endTf) {
//there is a Tj (text)
if (endTf == 0) {
//we dont have a font command defined so allow for one
preFontStream = new String(bytes, 0, startTj);
betweenFontAndTextStream = " ";
} else {
//we have a font command
preFontStream = new String(bytes, 0, startTf);
fontStr = new String(bytes, startTf, endTf - startTf);
betweenFontAndTextStream = new String(bytes, endTf, startTj - endTf);
}
//-3 to ignore the Tj command letters at the end as we add that ourselves.
text = new String(bytes, startTj, endTj - 3 - startTj);
afterTextStream = new String(bytes, endTj, bytes.length - endTj);
} else {
//theres no TJ
if (endTf == 0) {
//store as command1, and if not valid we deal with below with default command
preFontStream = new String(bytes);
} else {
//we have a font command
preFontStream = new String(bytes, 0, startTf);
fontStr = new String(bytes, startTf, endTf - startTf);
//add rest to middleCommand so Text can be added to end
betweenFontAndTextStream = new String(bytes, endTf, bytes.length - endTf);
}
}
}
}
//get the forms font string
final String DA = form.getTextStreamValue(PdfDictionary.DA);
//create a fake XObject to make use of the code we already have to generate image
fakeObj = new XObject(form.getObjectRefAsString()); //value does not matter
if (DA == null || DA.isEmpty()) {
if (!fontStr.isEmpty()) {
//set font we have found
form.setTextStreamValue(PdfDictionary.DA, StringUtils.toBytes(fontStr));
FormStream.decodeFontCommandObj(fontStr, form);
}
//use old methods as appropriate info not present.
return false;
} else { //updated by Mark as previous code had bug
//we replace the TF string (ie /FO_0 8 Tf) with the DA value (ie /Helv 8 Tf) to get the font name
//this though assumes that Tm is 1 0 0 1 (scaling is done by fotnsize not matrix)
//on sample file Tf was 1 and Tm was 8 0 0 8 so we ended up with text 8 times too big as we changed
// /Fo_0 1 Tf to /Helv 8 Tf while not altering Tm
//I have fixed by keeping Tf value and using /DA font part
if (fontStr.isEmpty()) //use defined DA and remove any whitespace at front (ORIGINAL version)
{
//first file since we wrote this code in 2004 where the DA stream has contained more than a font and needs rest of data stripped off
int ptr = DA.indexOf('/');
if (ptr < 0) {
ptr = 0;
}
//end of new code
fontStr = DA.substring(ptr).trim();
} else { //get font name from DA but use original fontsize
final String fontname = DA.substring(0, DA.indexOf(' '));
final String fontsize = fontStr.substring(fontStr.indexOf(' '), fontStr.length());
fontStr = fontname + fontsize;
fontStr = fontStr.trim();
}
}
//do not think we need but here for completeness
// XObject.setFloatArray(PdfDictionary.Matrix,new float[]{1,0,0,1,0,0});
//forms can have resources (Fonts, XOBjects, etc) which are in the DR value -
//we store this in AcroRenderer
if (resources != null) {
fakeObj.setDictionary(PdfDictionary.Resources, resources);
}
final Rectangle BBox = form.getBoundingRectangle();
if (BBox != null) {
fakeObj.setFloatArray(PdfDictionary.BBox, new float[]{BBox.width, 0, 0, BBox.height, 0, 0});
}
subtype = -1; //could use PdfDictionary.Highlight for transparency
//if no command in file.
if (preFontStream.isEmpty() || !preFontStream.contains("BT")) {
//build a fake command stream to decode
preFontStream = "BT 0 0 0 RG 1 TFS ";
betweenFontAndTextStream = " 1 0 0 1 0 0 Tm ";
afterTextStream = "";
}
//find the start and end of the size param
final int sizeSt = fontStr.indexOf(' ');
int sizeEn = -1;
boolean strFound = false;
for (int i = sizeSt; i < fontStr.length(); i++) {
final char chr = fontStr.charAt(i);
if (chr == ' ' || chr == 10 || chr == 13) {
if (strFound) {
sizeEn = i;
break;
}
} else {
strFound = true;
}
}
float size = 12;
if (sizeEn != -1) {
//store the name, and command
fontName = fontStr.substring(0, sizeSt);
fontCommand = fontStr.substring(sizeEn);
size = Float.parseFloat(fontStr.substring(sizeSt, sizeEn));
}
//store the seperate font attributes
if (fontName.isEmpty()) {
final Font textFont = form.getTextFont();
fontName = '/' + textFont.getFontName();
fontCommand = "Tf ";
}
//check if font size needs autosizing
if (size == 0 || size == -1) {
//call our calculate routine to work out a good size
size = GUIData.calculateFontSize(BBox.height, BBox.width, false, text);
}
fontSize = " " + size + ' ';
return true;
}
public void setAlignment(final int alignment) {
this.alignment = alignment;
}
/**
* generates higher quality images
*/
public void setPrinting(final boolean print, final int multiplier) {
currentlyPrinting = print;
printMultiplier = multiplier;
checkAndCreateimage();
}
public PdfObject getFakeObject() {
return fakeObj;
}
}
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