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An Open Source JavaFX PDF Viewer
/*
* ===========================================
* 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
*
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* ---------------
* SingleDisplayFX.java
* ---------------
*/
package org.jpedal.display.javafx;
import javafx.application.Platform;
import javafx.geometry.Bounds;
import javafx.scene.Group;
import javafx.scene.Node;
import javafx.scene.control.ScrollPane;
import javafx.scene.layout.Pane;
import javafx.scene.paint.Color;
import javafx.scene.shape.*;
import javafx.scene.transform.Transform;
import org.jpedal.PdfDecoderFX;
import org.jpedal.display.Display;
import org.jpedal.display.GUIDisplay;
import org.jpedal.examples.viewer.commands.javafx.JavaFXPreferences;
import org.jpedal.examples.viewer.gui.JavaFxGUI;
import org.jpedal.external.Options;
import org.jpedal.objects.acroforms.AcroRenderer;
import org.jpedal.parser.DecoderOptions;
import org.jpedal.render.DynamicVectorRenderer;
import org.jpedal.render.FXDisplay;
public class SingleDisplayFX extends GUIDisplay {
final PdfDecoderFX pdf;
// Rectangle drawn on screen by user
private int[] cursorBoxOnScreen;
final Pane cursorBoxPane = new Pane();
public SingleDisplayFX(int pageNumber, final DynamicVectorRenderer currentDisplay, final PdfDecoderFX pdf, final DecoderOptions options) {
if(pageNumber<1) {
pageNumber = 1;
}
this.pageNumber=pageNumber;
this.currentDisplay=currentDisplay;
this.pdf=pdf;
this.options=options;
displayOffsets=pdf.getDisplayOffsets();
pageData=pdf.getPdfPageData();
}
public SingleDisplayFX(final PdfDecoderFX pdf, final DecoderOptions options) {
this.pdf=pdf;
this.options=options;
displayOffsets=pdf.getDisplayOffsets();
pageData=pdf.getPdfPageData();
}
@Override
public void refreshDisplay(){
if(Platform.isFxApplicationThread()){
if(displayScalingDbl!=null){
pdf.getTransforms().setAll(Transform.affine(displayScalingDbl[0],displayScalingDbl[1],displayScalingDbl[2],displayScalingDbl[3],displayScalingDbl[4],displayScalingDbl[5]));
}
if(currentDisplay!=null){
paintPage(pdf.highlightsPane, pdf.getFormRenderer());
}
}else{
// Ensure dialog is handled on FX thread
Platform.runLater(new Runnable() {
@Override
public void run() {
if(displayScalingDbl!=null){
pdf.getTransforms().setAll(Transform.affine(displayScalingDbl[0],displayScalingDbl[1],displayScalingDbl[2],displayScalingDbl[3],displayScalingDbl[4],displayScalingDbl[5]));
}
if(currentDisplay!=null){
paintPage(pdf.highlightsPane, pdf.getFormRenderer());
}
}
});
}
}
/**
* initialise panel and set size to display during updates and update the AffineTransform to new values
* @param newRotation int value to specify the rotation for the page
*/
@Override
public void setPageRotation(final int newRotation) {
super.setPageRotation(newRotation);
// force redraw if screen being cached
refreshDisplay();
}
static Path getBorder(final int crw, final int crh) {
final Path border=new Path();
border.getElements().add(new MoveTo(-1,-1));
border.getElements().add(new LineTo(crw+2,-1));
border.getElements().add(new LineTo(crw+2,crh+2));
border.getElements().add(new LineTo(-1,crh+2));
border.getElements().add(new ClosePath());
border.setStroke(Color.rgb(0,0,0));
return border;
}
/**
* Resets the FXPane when we open a new PDF
*/
@Override
public void disableScreen() {
if (currentDisplay != null) {
final Group FXpane = ((FXDisplay) currentDisplay).getFXPane();
if (pdf.getChildren().contains(FXpane)) {
final int count = pdf.getChildren().size();
for (int i = 0; i < count; i++) {
pdf.getChildren().remove(0);
}
}
}
}
private void paintPage(final Object rawBox, final AcroRenderer formRenderer) {
final boolean debugPane=false;
final Pane box=(Pane)rawBox;
final Group fxPane=((FXDisplay)currentDisplay).getFXPane();
final String pageNumberStr = String.valueOf(pageNumber);
final Rectangle clip = new Rectangle(crx,cry,crw,crh);
clip.setFill(Color.WHITE);
// Remove box from the current node it belongs to - avoids duplication errors
if(box != null && box.getParent() != null) {
((Group) box.getParent()).getChildren().remove(box);
}
fxPane.getChildren().addAll(box);
pdf.setPrefSize(crw, crh);
if(displayView==SINGLE_PAGE){
pdf.getChildren().clear();
if(formRenderer.isXFA()){
// Draw wihte background border on xfa contents
final Path border = getBorder(crw, crh);
border.setFill(Color.WHITE);
pdf.getChildren().addAll(border);
border.setLayoutX(crx);
border.setLayoutY(cry);
}
if(!pdf.getChildren().contains(fxPane)){
pdf.getChildren().addAll(fxPane);
}
fxPane.setLayoutX(-crx);
fxPane.setLayoutY(-cry);
}else{
Node pagePath = null;
for (final Node child : pdf.getChildren()) {
if(child.getId()!=null && child.getId().equals(pageNumberStr)){
if(child instanceof Path){
pagePath = child;
}
}
}
if(pagePath!=null){
pdf.getChildren().remove(pagePath);
}
fxPane.setId(pageNumberStr);
if(!pdf.getChildren().contains(fxPane)){
pdf.getChildren().addAll(fxPane);
}
final int[] xReached= multiDisplayOptions.getxReached();
final int[] yReached= multiDisplayOptions.getyReached();
int cx;
final int cy;
final int j=pageNumber;
cx=(int)(xReached[j]/scaling);
cy=(int)(yReached[j]/scaling);
// Code works differently in Swing and FX so needs reversing
if(displayView==CONTINUOUS_FACING){
cx=currentOffset.getWidestPageR()-cx;
}
fxPane.setLayoutX(-cx);
fxPane.setLayoutY(pdf.getHeight()-cy);
}
if(!debugPane){
clip.setFill(Color.WHITE);
fxPane.setClip(clip);
}else{
// Debug Different GUI Display Panes
clip.setFill(Color.BLUE);
clip.setOpacity(0.5);
fxPane.getChildren().add(clip);
pdf.setStyle("-fx-background-color: red;");
pdf.getParent().setStyle("-fx-background-color: yellow;");
fxPane.setStyle("-fx-background-color: green;");
}
addForms(formRenderer);
}
private void addForms(final AcroRenderer formRenderer) {
int start=pageNumber,end=pageNumber;
// Control if we display forms on multiple pages
if(displayView!=Display.SINGLE_PAGE){
start= getStartPage();
end= getEndPage();
if(start==0 || end==0 || lastEnd!=end || lastStart!=start) {
lastFormPage = -1;
}
lastEnd=end;
lastStart=start;
}
if((lastFormPage!=pageNumber) && (formRenderer != null)){
formRenderer.displayComponentsOnscreen(start,end);
// Switch off if forms for this page found
if(formRenderer.getCompData().hasformsOnPageDecoded(pageNumber)) {
lastFormPage = pageNumber; //ensure not called too early
}
}
// Add the forms to the Pane
if(formRenderer!=null && currentOffset !=null){ // If all forms flattened, we can get a null value for currentOffset so avoid this case
formRenderer.getCompData().setPageValues(scaling,displayRotation,(int)indent,displayOffsets.getUserOffsetX(), displayOffsets.getUserOffsetY(),displayView,currentOffset.getWidestPageNR(), currentOffset.getWidestPageR());
formRenderer.getCompData().resetScaledLocation(scaling,displayRotation,(int)indent); // Indent here does nothing.
}
}
@Override
public void init(final float scaling, final int displayRotation, final int pageNumber, final DynamicVectorRenderer currentDisplay, final boolean isInit){
this.pageData=pdf.getPdfPageData();
super.init(scaling, displayRotation, pageNumber, currentDisplay, isInit);
setPageSize(pageNumber, scaling);
lastFormPage = -1;
}
/**
* Set the page size for the given page and scaling.
* The scaling is not actually applied here. It is instead passed along to
* used by FX transformations.
* @param pageNumber int value representing the page number
* @param scaling float value representing the scaling for the page
*/
@Override
public void setPageSize(final int pageNumber, final float scaling) {
// Handle clip - crop box values
pageData.setScalingValue(scaling); //ensure aligned
topW=pageData.getCropBoxWidth(pageNumber);
topH=pageData.getCropBoxHeight(pageNumber);
final double mediaH=pageData.getMediaBoxHeight(pageNumber);
cropX=pageData.getCropBoxX(pageNumber);
cropY=pageData.getCropBoxY(pageNumber);
cropW=topW;
cropH=topH;
// Actual clip values - for flipped page
if(displayView==Display.SINGLE_PAGE){
crx =(int)(insetW+cropX);
cry =(int)(insetH-cropY);
}else{
crx =insetW;
cry =insetH;
}
// Amount needed to move cropped page into correct position
int offsetY=(int) (mediaH-cropH);
// Adjust the offset more in cases like costena
if(!pageData.getMediaValue(pageNumber).isEmpty()){
offsetY -= pageData.getMediaBoxHeight(pageNumber) - (int)(cropY + cropH) - pageData.getCropBoxY(pageNumber);
}
crw =(int)(cropW);
crh =(int)(cropH);
cry += offsetY;
}
@Override
public int[] getCursorBoxOnScreenAsArray(){
return cursorBoxOnScreen;
}
@Override
public void updateCursorBoxOnScreen(final int[] newOutlineRectangle, final int outlineColor, final int pageNumber, final int x_size, final int y_size) {
if (displayView != Display.SINGLE_PAGE && getPageSize(displayView)[0] == 0 && getPageSize(displayView)[1] == 0) {
return;
}
if (newOutlineRectangle != null) {
final int x = newOutlineRectangle[0] - pageData.getCropBoxX(pageNumber);
final int y = newOutlineRectangle[1] - pageData.getCropBoxY(pageNumber);
final int w = newOutlineRectangle[2];
final int h = newOutlineRectangle[3];
cursorBoxOnScreen = new int[]{x, y, w, h};
if(DecoderOptions.showMouseBox){
//Setup Cursor box.
final Rectangle cursorRect = new Rectangle(x, y, w, h);
cursorRect.setStroke(JavaFXPreferences.shiftColorSpaceToFX(outlineColor));
cursorRect.setFill(Color.TRANSPARENT);
//Draw Cursor box.
if(pdf.getChildren().contains(cursorBoxPane)){
cursorBoxPane.getChildren().clear();
cursorBoxPane.getChildren().add(cursorRect);
pdf.getChildren().remove(cursorBoxPane);
}
pdf.getChildren().add(cursorBoxPane);
}
} else {
cursorBoxOnScreen = null;
if (pdf.getChildren().contains(cursorBoxPane)) {
cursorBoxPane.getChildren().clear();
pdf.getChildren().remove(cursorBoxPane);
}
}
}
@Override
public java.awt.Rectangle getDisplayedRectangle() {
final ScrollPane customFXHandle= ((JavaFxGUI)pdf.getExternalHandler(Options.MultiPageUpdate)).getPageContainer();
if(customFXHandle==null){
return new java.awt.Rectangle(0,0,0,0);
}
final Bounds bounds = customFXHandle.getViewportBounds();
return getDisplayedRectangle(true,new java.awt.Rectangle((int)bounds.getMinX(),(int)-bounds.getMinY(),(int)bounds.getWidth(),(int)bounds.getHeight()));
}
}