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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 1997-2015 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
*
* ---------------
* JavaFXExtractText.java
* ---------------
*/
package org.jpedal.examples.viewer.commands.javafx;
import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.geometry.Insets;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.RadioButton;
import javafx.scene.control.TextArea;
import javafx.scene.control.Toggle;
import javafx.scene.control.ToggleGroup;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.HBox;
import javafx.scene.layout.Priority;
import javafx.scene.layout.Region;
import javafx.scene.layout.VBox;
import javafx.stage.Modality;
import javafx.stage.Stage;
import org.jpedal.PdfDecoderInt;
import org.jpedal.examples.viewer.Values;
import org.jpedal.examples.viewer.commands.generic.GUICopy;
import org.jpedal.examples.viewer.commands.generic.GUIExtractText;
import org.jpedal.examples.viewer.gui.javafx.dialog.FXDialog;
import org.jpedal.examples.viewer.gui.javafx.dialog.FXMessageDialog;
import org.jpedal.gui.GUIFactory;
import org.jpedal.objects.PdfPageData;
import org.jpedal.utils.Messages;
/**
* Class to Handle the popup dialogs created when user right clicks
* highlighted text and chooses text extraction.
*/
public class JavaFXExtractText extends GUIExtractText {
public static void execute(final Object[] args, final GUIFactory currentGUI, final PdfDecoderInt decode_pdf, final Values commonValues) {
if (args == null) {
extractSelectedText(currentGUI, decode_pdf, commonValues);
} else {
}
}
/**
* routine to link GUI into text extraction functions
*/
private static void extractSelectedText(final GUIFactory currentGUI, final PdfDecoderInt decode_pdf, final Values commonValues) {
if (!decode_pdf.isExtractionAllowed()) {
currentGUI.showMessageDialog("Not allowed");
return;
}
final int[][] highlights = decode_pdf.getTextLines().getHighlightedAreasAs2DArray(commonValues.getCurrentPage());
/**
* ensure co-ords in right order
*/
if (highlights == null) {
//
return;
}
final BorderPane border = new BorderPane();
final FXDialog textExtractionOptions = new FXDialog((Stage)currentGUI.getFrame(), Modality.APPLICATION_MODAL, border, 300, 300);
textExtractionOptions.setTitle("Text Extraction Options");
//Set up Radiobuttons
final HBox radButtons = new HBox();
final RadioButton rectangle = new RadioButton("Rectangle");
rectangle.setId("rectangleExtraction");
final RadioButton table = new RadioButton("Table");
table.setId("tableExtraction");
final RadioButton wordList = new RadioButton("WordList");
wordList.setId("wordListExtraction");
radButtons.getChildren().addAll(rectangle, table, wordList);
table.setPadding(new Insets(0,0,0,20));
wordList.setPadding(new Insets(0,0,0,45));
border.setTop(radButtons);
//Set up Selectedtext Area
final TextArea selection = new TextArea();
border.setCenter(selection);
//Setup bottom Radio Buttons and Bottom Buttons
final VBox allBottom = new VBox();
final HBox bottomButtons = new HBox(15);
final HBox bottomRadioButtons = new HBox();
final RadioButton extractAsXML = new RadioButton("Extract as XML");
final RadioButton extractAsText = new RadioButton("Extract as Text");
final Button help = new Button("Help");
final Button cancel = new Button("Cancel");
cancel.setOnAction(new EventHandler() {
@Override
public void handle(final javafx.event.ActionEvent e) {
textExtractionOptions.close();
}
});
final Button extractButton = new Button("Extract");
extractButton.setVisible(true); //currently disabled button until window is coded.
final Region spacer = new Region();
HBox.setHgrow(spacer, Priority.ALWAYS);
bottomRadioButtons.getChildren().addAll(extractAsXML, spacer, extractAsText);
bottomButtons.setAlignment(Pos.BOTTOM_RIGHT);
bottomButtons.getChildren().addAll(help, cancel, extractButton);
allBottom.getChildren().addAll(bottomRadioButtons, bottomButtons);
extractAsXML.setPadding(new Insets(0,0,0,10));
extractAsText.setPadding(new Insets(0,10,13,0));
bottomButtons.setPadding(new Insets(0,5,10,0));
/**
* Setup button listeners.
*/
help.setOnAction(new EventHandler() {
@Override
public void handle(final ActionEvent t) {
currentGUI.showMessageDialog(Messages.getMessage("PdfViewerGroupingInfo.message"));
}
});
//Add format buttons to a toggle group, so only one be selected.
final ToggleGroup formatGroup = new ToggleGroup();
rectangle.setSelected(true);
formatGroup.getToggles().addAll(rectangle, table, wordList);
final ChangeListener updateSelectionListener = new ChangeListener() {
@Override
public void changed(final ObservableValue ov,
final Toggle old_toggle, final Toggle new_toggle) {
selection.setText(updateSelection(formatGroup.getSelectedToggle(), extractAsXML.isSelected(), decode_pdf, commonValues, currentGUI));
}
};
formatGroup.selectedToggleProperty().addListener(updateSelectionListener);
//Add extraction mode to a toggle group, so only one be selected.
final ToggleGroup extractionGroup = new ToggleGroup();
extractAsText.setSelected(true);
extractionGroup.getToggles().addAll(extractAsXML, extractAsText);
extractionGroup.selectedToggleProperty().addListener(updateSelectionListener);
extractButton.setOnAction(new EventHandler() {
@Override
public void handle(final ActionEvent t) {
createExtractionWindow(formatGroup.getSelectedToggle(), extractAsXML.isSelected(), decode_pdf, commonValues, currentGUI);
}
});
selection.setText(updateSelection(formatGroup.getSelectedToggle(), extractAsXML.isSelected(), decode_pdf, commonValues, currentGUI));
border.setBottom(allBottom);
BorderPane.setMargin(selection, new Insets(10,10,10,10));
BorderPane.setMargin(radButtons, new Insets(10,10,10,10));
BorderPane.setMargin(bottomRadioButtons, new Insets(10,10,10,10));
BorderPane.setMargin(bottomButtons, new Insets(10,10,10,10));
textExtractionOptions.show();
}
private static String updateSelection(final Toggle selected, final boolean isXML, final PdfDecoderInt decode_pdf, final Values commonValues, final GUIFactory currentGUI) {
StringBuilder finalValue = new StringBuilder(""); // Total data extracted so far
try {
final PdfPageData page_data = decode_pdf.getPdfPageData();
final int cropX = page_data.getCropBoxX(commonValues.getCurrentPage());
final int cropY = page_data.getCropBoxY(commonValues.getCurrentPage());
final int cropW = page_data.getCropBoxWidth(commonValues.getCurrentPage());
final int cropH = page_data.getCropBoxHeight(commonValues.getCurrentPage());
final int[][] highlights = decode_pdf.getTextLines().getHighlightedAreasAs2DArray(commonValues.getCurrentPage());
if (highlights != null) {
for (int t = 0; t != highlights.length; t++) {
String extractedText = "";
if (highlights[t] != null) {
highlights[t] = GUICopy.adjustHighlightForExtraction(highlights[t]);
int t_x1 = highlights[t][0];
int t_x2 = highlights[t][0] + highlights[t][2];
int t_y1 = highlights[t][1] + highlights[t][3];
int t_y2 = highlights[t][1];
if (t_y1 < t_y2) {
final int temp = t_y2;
t_y2 = t_y1;
t_y1 = temp;
}
if (t_x1 > t_x2) {
final int temp = t_x2;
t_x2 = t_x1;
t_x1 = temp;
}
if (t_x1 < cropX) {
t_x1 = cropX;
}
if (t_x1 > cropX + cropW) {
t_x1 = cropX + cropW;
}
if (t_x2 < cropX) {
t_x2 = cropX;
}
if (t_x2 > cropX + cropW) {
t_x2 = cropX + cropW;
}
if (t_y1 < cropY) {
t_y1 = cropY;
}
if (t_y1 > cropY + cropH) {
t_y1 = cropY + cropH;
}
if (t_y2 < cropY) {
t_y2 = cropY;
}
if (t_y2 > cropY + cropH) {
t_y2 = cropY + cropH;
}
if ("rectangleExtraction".equals(((RadioButton) selected).getId())) {
//text extraction
extractedText = extractTextRectangle(commonValues, decode_pdf, currentGUI, isXML, t_x1, t_x2, t_y1, t_y2) + ((char) 0x0D) + ((char) 0x0A);
} else if ("tableExtraction".equals(((RadioButton) selected).getId())) {
//text table extraction
extractedText = extractTextTable(commonValues, decode_pdf, isXML, t_x1, t_x2, t_y1, t_y2);
} else if ("wordListExtraction".equals(((RadioButton) selected).getId())) {
//text wordlist extraction
extractedText = extractTextList(decode_pdf, commonValues, currentGUI, isXML, t_x1, t_x2, t_y1, t_y2);
}
finalValue.append(extractedText);
}
}
}
} catch (final Exception e) {
e.printStackTrace();
}
return finalValue.toString();
}
private static void createExtractionWindow(final Toggle selected, final boolean isXML, final PdfDecoderInt decode_pdf, final Values commonValues, final GUIFactory currentGUI) {
/**
* Setup Dialog with Content.
*/
final Stage extractionDialog = new Stage();
final TextArea ta = new TextArea();
final Scene scene = new Scene(ta);
extractionDialog.setTitle("Extracted Text");
extractionDialog.setScene(scene);
ta.setText(updateSelection(selected, isXML, decode_pdf, commonValues, currentGUI));
extractionDialog.show();
}
}