From f39ab43fc0120b7fa97028d40acd7851de8d4a99 Mon Sep 17 00:00:00 2001
From: Jakob Heher <jakob.heher@iaik.tugraz.at>
Date: Thu, 24 Nov 2022 14:14:37 +0100
Subject: Repository moved to GitHub: https://github.com/a-sit/pdf-over

---
 .../pdfover/gui/composites/SignaturePanel.java     | 483 ---------------------
 1 file changed, 483 deletions(-)
 delete mode 100644 pdf-over-gui/src/main/java/at/asit/pdfover/gui/composites/SignaturePanel.java

(limited to 'pdf-over-gui/src/main/java/at/asit/pdfover/gui/composites/SignaturePanel.java')

diff --git a/pdf-over-gui/src/main/java/at/asit/pdfover/gui/composites/SignaturePanel.java b/pdf-over-gui/src/main/java/at/asit/pdfover/gui/composites/SignaturePanel.java
deleted file mode 100644
index df880459..00000000
--- a/pdf-over-gui/src/main/java/at/asit/pdfover/gui/composites/SignaturePanel.java
+++ /dev/null
@@ -1,483 +0,0 @@
-/*
- * Copyright 2012 by A-SIT, Secure Information Technology Center Austria
- *
- * Licensed under the EUPL, Version 1.1 or - as soon they will be approved by
- * the European Commission - subsequent versions of the EUPL (the "Licence");
- * You may not use this work except in compliance with the Licence.
- * You may obtain a copy of the Licence at:
- * http://joinup.ec.europa.eu/software/page/eupl
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the Licence is distributed on an "AS IS" basis,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the Licence for the specific language governing permissions and
- * limitations under the Licence.
- */
-package at.asit.pdfover.gui.composites;
-
-// Imports
-import java.awt.BorderLayout;
-import java.awt.Color;
-import java.awt.Cursor;
-import java.awt.Dimension;
-import java.awt.Graphics;
-import java.awt.Image;
-import java.awt.event.MouseAdapter;
-import java.awt.event.MouseEvent;
-import java.awt.geom.Point2D;
-import java.awt.geom.Rectangle2D;
-import java.awt.image.BufferedImage;
-import java.io.IOException;
-
-import javax.annotation.CheckForNull;
-import javax.swing.JPanel;
-
-import org.apache.pdfbox.pdmodel.PDDocument;
-import org.apache.pdfbox.pdmodel.PDPage;
-import org.apache.pdfbox.pdmodel.common.PDRectangle;
-import org.apache.pdfbox.rendering.PDFRenderer;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
-import at.asit.pdfover.commons.Messages;
-
-/**
- *
- */
-public class SignaturePanel extends JPanel {
-	/**
-	 * SLF4J Logger instance
-	 **/
-	private static final Logger log = LoggerFactory.getLogger(SignaturePanel.class);
-
-	/** Default serial version ID */
-	private static final long serialVersionUID = 1L;
-
-	/** The PDF file being displayed */
-	private PDDocument pdf = null;
-	private PDFRenderer renderer = null;
-
-	/** The image of the rendered PDF page being displayed */
-	Image currentImage = null;
-
-	/** The current scale for rendering pdf to image */
-	private float pageToImageScale;
-	/** The current scale for rendering image to screen */
-	private double imageToScreenScale;
-	/* scaling */
-	private enum U {
-		/* (0,0) is bottom-left of page */
-		PAGE_ABS,
-		/* (0,0) is top-left of page */
-		PAGE_REL,
-		/* pixels, (0,0) is top-left of image */
-		IMAGE,
-		/* pixels, (0,0) is top-left of image */
-		SCREEN_REL,
-		/* pixels, (0,0) is top-left of canvas */
-		SCREEN_ABS };
-	private enum Dim { X, Y };
-	private double scale(double v, U from, U to, Dim d)
-	{
-		if (from == to) return v;
-
-		if (from == U.PAGE_ABS) {
-			return scale((d == Dim.X) ? v : (this.pageHeight - v), U.PAGE_REL, to, d);
-		} else if (from == U.PAGE_REL) {
-			if (to == U.PAGE_ABS)
-				return ((d == Dim.X) ? v : (this.pageHeight - v));
-			else
-				return scale(v * this.pageToImageScale, U.IMAGE, to, d);
-		} else if (from == U.IMAGE) {
-			if ((to == U.PAGE_ABS) || (to == U.PAGE_REL))
-				return scale(v / this.pageToImageScale, U.PAGE_REL, to, d);
-			else
-				return scale(v * this.imageToScreenScale, U.SCREEN_REL, to, d);
-		} else if (from == U.SCREEN_REL) {
-			if (to == U.SCREEN_ABS)
-				return (v + ((d == Dim.X) ? this.offX : this.offY));
-			else
-				return scale(v / this.imageToScreenScale, U.IMAGE, to, d);
-		} else if (from == U.SCREEN_ABS) {
-			return scale(v - ((d == Dim.X) ? this.offX : this.offY), U.SCREEN_REL, to, d);
-		} else throw new RuntimeException("unreachable");
-	}
-
-	private float pageWidth = 0;
-	private float pageHeight = 0;
-	/** The horizontal offset of the image from the left edge of the panel */
-	private int offX = 0;
-	/** The vertical offset of the image from the top of the panel */
-	private int offY = 0;
-	/** The position of the top-left corner of the signature, in absolute page space */
-	private Point2D sigPagePos = null;
-	public @CheckForNull Point2D getSigPagePos() { return this.sigPagePos; }
-	/** The signature placeholder image */
-	private Image sigPlaceholder = null;
-	/** Width of the signature placeholder in page space */
-	private int sigPageWidth = 0;
-	/** Height of the signature placeholder in page space */
-	private int sigPageHeight = 0;
-	/** Color of the signature placeholder border */
-	private Color sigPlaceholderBorderColor = Color.BLUE;
-	/** Current page */
-	private int currentPageNo = 0;
-	/** Number of pages in the document */
-	private int numPages = 0;
-	/** Cursor types */
-	private static enum Cursors {DEFAULT, HAND, MOVE};
-	/** Default arrow cursor */
-	private final Cursor defaultCursor = Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR);
-	/** Hand cursor */
-	private final Cursor handCursor = Cursor.getPredefinedCursor(Cursor.HAND_CURSOR);
-	/** Move cursor */
-	private final Cursor moveCursor = Cursor.getPredefinedCursor(Cursor.MOVE_CURSOR);
-	/** Current cursor */
-	private Cursors currentCursor = Cursors.DEFAULT;
-
-	/**
-	 * Create a new PagePanel.
-	 */
-	public SignaturePanel() {
-		super(new BorderLayout());
-		setDocument(null);
-		setFocusable(true);
-		addMouseListener(this.mouseListener);
-		addMouseMotionListener(this.mouseListener);
-	}
-
-	/**
-	 * Set a new document to be displayed
-	 * @param pdf the PDFFile to be displayed
-	 */
-	public void setDocument(PDDocument pdf) {
-		this.pdf = pdf;
-		this.sigPagePos = null;
-		if (pdf != null)
-		{
-			this.renderer = new PDFRenderer(pdf);
-			this.numPages = pdf.getNumberOfPages();
-			this.currentPageNo = -1;
-			showPage(this.numPages);
-		}
-		else
-		{
-			this.renderer = null;
-			this.currentPageNo = 0;
-			this.numPages = 0;
-			renderPageToImage();
-			repaint();
-		}
-	}
-
-	/**
-	 * Set the signature placeholder image
-	 * @param placeholder signature placeholder
-	 * @param width width of the placeholder in page space
-	 * @param height height of the placeholder in page space
-	 */
-	public void setSignaturePlaceholder(Image placeholder) {
-		this.sigPlaceholder = placeholder;
-		// TODO figure out why this is divided by 4 (factor ported from old code)
-		this.sigPageWidth = placeholder.getWidth(null) / 4;
-		this.sigPageHeight = placeholder.getHeight(null) / 4;
-		renderPageToImage();
-		if (this.sigPagePos != null)
-			setSignaturePosition(this.sigPagePos.getX(), this.sigPagePos.getY());
-		repaint();
-	}
-
-	/**
-	 * Set the color of the signature placeholder border
-	 * @param color new signature placeholder border color
-	 */
-	public void setSignaturePlaceholderBorderColor(Color color) {
-		this.sigPlaceholderBorderColor = color;
-	}
-
-	/**
-	 * Change the currently displayed page
-	 * @param page the number of the page to display
-	 */
-	public void showPage(int page) {
-		if (this.currentPageNo == page) return;
-		this.currentPageNo = page;
-		renderPageToImage();
-		repaint();
-	}
-
-	/**
-	 * Add and display a new page at the end of the document
-	 *
-	 * This page has the same dimensions as the old last page
-	 */
-	public void addNewLastPage() {
-		showPage(this.numPages + 1);
-	}
-
-	/**
-	 * Set the signature placeholder position
-	 * @param x the horizontal signature position
-	 * @param y the vertical signature position
-	 */
-	public void setSignaturePosition(double x, double y)
-	{
-		this.sigPagePos = new Point2D.Double(
-			clamp(x, 0, this.pageWidth - this.sigPageWidth),
-			clamp(y, this.sigPageHeight, this.pageHeight)
-		);
-		repaint();
-	}
-
-	public void translateSignaturePagePosition(float dX, float dY) {
-		setSignaturePosition(this.sigPagePos.getX() + dX, this.sigPagePos.getY() + dY);
-	}
-
-	/**
-	 * Stop the generation of any previous page, and draw the new one.
-	 *
-	 * @param page the PDFPage to draw.
-	 */
-	private synchronized void renderPageToImage() {
-		if (this.pdf == null)
-		{
-			this.currentImage = null;
-			return;
-		}
-
-		boolean newPage = false;
-		PDPage currentPage;
-		// set up the new page
-		if (this.currentPageNo > this.numPages)
-		{
-			// New last page - use old last page as template
-			currentPage = this.pdf.getPage(this.numPages-1);
-			newPage = true;
-		}
-		else
-			currentPage = this.pdf.getPage(this.currentPageNo-1);
-
-
-		if (currentPage == null) {
-			// no page
-			this.currentImage = null;
-			return;
-		}
-		
-		boolean isRotated = ((currentPage.getRotation()%180) == 90);
-		PDRectangle actualPageSize = currentPage.getBBox();
-		this.pageWidth = isRotated ? actualPageSize.getHeight() : actualPageSize.getWidth();
-		this.pageHeight = isRotated ? actualPageSize.getWidth() : actualPageSize.getHeight();
-		this.pageToImageScale = getToolkit().getScreenSize().height / this.pageHeight;
-
-		// get the new image
-		if (newPage)
-		{
-			int renderHeight = (int)(0.5 + this.scale(this.pageHeight, U.PAGE_REL, U.IMAGE, Dim.X));
-			int renderWidth = (int)(0.5 + this.scale(this.pageWidth, U.PAGE_REL, U.IMAGE, Dim.Y));
-			this.currentImage = new BufferedImage(renderWidth, renderHeight, BufferedImage.TYPE_INT_RGB);
-			Graphics g = this.currentImage.getGraphics();
-			g.setColor(Color.WHITE);
-			g.fillRect(0, 0, renderWidth, renderHeight);
-		}
-		else
-		{
-			int whichPage = Math.min(this.currentPageNo, this.numPages);
-
-			try {
-				this.currentImage = renderer.renderImage(whichPage-1, this.pageToImageScale);
-			} catch (IOException e) {
-				log.error(String.format("Failed to render image for page %d of %d", whichPage, this.numPages), e);
-				this.currentImage = null;
-			}
-		}
-
-		if (this.sigPagePos == null)
-		{
-			setSignaturePosition(
-				this.pageWidth * .5,
-				this.pageHeight * .75
-			);
-		}
-	}
-
-	/**
-	 * Draw the image.
-	 */
-	@Override
-	public void paint(Graphics g) {
-		Dimension renderPanelSize = getSize();
-		g.setColor(getBackground());
-		g.fillRect(0, 0, getWidth(), getHeight());
-		if (this.currentImage == null) {
-			g.setColor(Color.black);
-			g.drawString(Messages.getString("common.working"), getWidth() / 2 - 30, getHeight() / 2);
-		} else {
-			this.imageToScreenScale = Math.min(
-				renderPanelSize.getWidth() / this.currentImage.getWidth(null),
-				renderPanelSize.getHeight() / this.currentImage.getHeight(null));
-			// draw the image
-			int actualRenderWidth = (int)(this.currentImage.getWidth(null) * this.imageToScreenScale);
-			int actualRenderHeight = (int)(this.currentImage.getHeight(null) * this.imageToScreenScale);
-
-			// draw it centered within the panel
-			this.offX = (renderPanelSize.width - actualRenderWidth) / 2;
-			this.offY = (renderPanelSize.height - actualRenderHeight) / 2;
-
-			// draw document
-			g.drawImage(this.currentImage, this.offX, this.offY, actualRenderWidth, actualRenderHeight, null);
-			
-
-			// draw signature
-			int sigX = (int) this.scale(this.sigPagePos.getX(), U.PAGE_ABS, U.SCREEN_ABS, Dim.X);
-			int sigY = (int) this.scale(this.sigPagePos.getY(), U.PAGE_ABS, U.SCREEN_ABS, Dim.Y);
-			if (this.sigPlaceholder == null) {
-				g.setColor(Color.red);
-				g.drawRect(sigX, sigY, 100, 40);
-			}
-			else {
-				int sigScreenWidth = (int)this.scale(this.sigPageWidth, U.PAGE_REL, U.SCREEN_REL, Dim.X);
-				int sigScreenHeight = (int)this.scale(this.sigPageHeight, U.PAGE_REL, U.SCREEN_REL, Dim.Y);
-				g.drawImage(this.sigPlaceholder, sigX, sigY, sigScreenWidth, sigScreenHeight, null);
-				g.setColor(this.sigPlaceholderBorderColor);
-				g.drawRect(sigX, sigY, sigScreenWidth-1, sigScreenHeight-1);
-			}
-		}
-	}
-
-	/**
-	 * Handles notification of the fact that some part of the image changed.
-	 * Repaints that portion.
-	 *
-	 * @return true if more updates are desired.
-	 */
-	@Override
-	public boolean imageUpdate(Image img, int infoflags, int x, int y,
-			int width, int height) {
-		if ((infoflags & (SOMEBITS | ALLBITS)) != 0) {
-			repaint(x + this.offX, y + this.offY, width, height);
-		}
-		return ((infoflags & (ALLBITS | ERROR | ABORT)) == 0);
-	}
-
-	private MouseAdapter mouseListener = new MouseAdapter() {
-
-		private boolean doDrag = false;
-		private int dragXOffset = 0;
-		private int dragYOffset = 0;
-
-		private void updateSigPosDrag(MouseEvent evt) {
-			SignaturePanel.this.setSignaturePosition(
-				SignaturePanel.this.scale(evt.getX() - this.dragXOffset, U.SCREEN_ABS, U.PAGE_ABS, Dim.X),
-				SignaturePanel.this.scale(evt.getY() - this.dragYOffset, U.SCREEN_ABS, U.PAGE_ABS, Dim.Y)
-			);
-		}
-
-		/** Handles a mouseMoved event */
-		@Override
-		public void mouseMoved(MouseEvent evt) {
-			try {
-				boolean onSig = isOnSignature(evt);
-				setCursor(onSig ? Cursors.HAND : Cursors.DEFAULT);
-			} catch (NullPointerException e) {
-				// do nothing
-			}
-		}
-
-		/** Handles a mousePressed event */
-		@Override
-		public void mousePressed(MouseEvent evt) {
-			if (evt.getButton() == MouseEvent.BUTTON1)
-			{
-				this.doDrag = true;
-				if (isOnSignature(evt)) {
-					/* offsets (in screen units) from top-left corner of signature to cursor on drag start */
-					this.dragXOffset = (int)(evt.getX() - SignaturePanel.this.scale(SignaturePanel.this.sigPagePos.getX(), U.PAGE_ABS, U.SCREEN_ABS, Dim.X));
-					this.dragYOffset = (int)(evt.getY() - SignaturePanel.this.scale(SignaturePanel.this.sigPagePos.getY(), U.PAGE_ABS, U.SCREEN_ABS, Dim.Y));
-				} else {
-					this.dragXOffset = 0;
-					this.dragYOffset = 0;
-				}
-				updateSigPosDrag(evt);
-				setCursor(Cursors.MOVE);
-			}
-		}
-
-		/** Handles a mouseReleased event */
-		@Override
-		public void mouseReleased(MouseEvent evt) {
-			this.doDrag = false;
-			boolean onSig = isOnSignature(evt);
-			setCursor(onSig ? Cursors.HAND : Cursors.DEFAULT);
-		}
-
-		/**
-		 * Handles a mouseDragged event.
-		 */
-		@Override
-		public void mouseDragged(MouseEvent evt) {
-			if (this.doDrag)
-				updateSigPosDrag(evt);
-		}
-	};
-
-	/**
-	 * Sets the mouse cursor
-	 * @param cursor cursor to set
-	 */
-	void setCursor(Cursors cursor)
-	{
-		if (this.currentCursor == cursor)
-			return;
-		this.currentCursor = cursor;
-		Cursor cur = null;
-		switch (cursor) {
-			case DEFAULT:
-				cur = this.defaultCursor;
-				break;
-			case HAND:
-				cur = this.handCursor;
-				break;
-			case MOVE:
-				cur = this.moveCursor;
-				break;
-		}
-		this.getParent().setCursor(cur);
-	}
-
-	/**
-	 * Check whether given point is on signature placeholder
-	 * @param x x coordinate (screen)
-	 * @param y y coordinate (screen)
-	 * @return true if given point is on signature placeholder
-	 */
-	private boolean isOnSignature(MouseEvent evt)
-	{
-		if (this.sigPagePos == null)
-			return false;
-
-		Rectangle2D sig = new Rectangle2D.Double(
-			this.scale(this.sigPagePos.getX(), U.PAGE_ABS, U.SCREEN_ABS, Dim.X),
-			this.scale(this.sigPagePos.getY(), U.PAGE_ABS, U.SCREEN_ABS, Dim.Y),
-			this.scale(this.sigPageWidth, U.PAGE_REL, U.SCREEN_REL, Dim.X),
-			this.scale(this.sigPageHeight, U.PAGE_REL, U.SCREEN_REL, Dim.Y)
-		);
-		return sig.contains(evt.getX(), evt.getY());
-	}
-
-	/**
-	 * Clamp x to be within [min-max]
-	 * @param x int to clamp
-	 * @param min minimum value
-	 * @param max maximum value
-	 * @return clamped x
-	 */
-	private static double clamp(double x, double min, double max)
-	{
-		if (x < min)
-			x = min;
-		else if (x > max)
-			x = max;
-		return x;
-	}
-}
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