signature positioning bugfix

git-svn-id: https://joinup.ec.europa.eu/svn/pdf-as/trunk@607 7b5415b0-85f9-ee4d-85bd-d5d0c3b42d1c

1 files changed, 36 insertions, 251 deletions

diff --git a/src/main/java/at/knowcenter/wag/egov/egiz/pdf/PDFPage.java b/src/main/java/at/knowcenter/wag/egov/egiz/pdf/PDFPage.java
index 0bae3d2..cb4e642 100644
--- a/src/main/java/at/knowcenter/wag/egov/egiz/pdf/PDFPage.java
+++ b/src/main/java/at/knowcenter/wag/egov/egiz/pdf/PDFPage.java
@@ -88,248 +88,6 @@ public class PDFPage extends PDFTextStripper
     operators.put("Do", newInvoke);

   }

 

-  // /**

-  // * You should override this method if you want to perform an action when a

-  // * string is being shown.

-  // *

-  // * @param string The string to display.

-  // *

-  // * @throws IOException If there is an error showing the string

-  // */

-  // public void showString( byte[] string ) throws IOException

-  // {

-  // float spaceWidth = 0;

-  // float spacing = 0;

-  // StringBuffer stringResult = new StringBuffer(string.length);

-  //      

-  // float characterDisplacement = 0;

-  // float spaceDisplacement = 0;

-  //      

-  // PDGraphicsState graphicsState = getGraphicsState();

-  // float fontSize = graphicsState.getTextState().getFontSize();

-  // float horizontalScaling =

-  // graphicsState.getTextState().getHorizontalScalingPercent()/100f;

-  // float rise = graphicsState.getTextState().getRise();

-  // final float wordSpacing = graphicsState.getTextState().getWordSpacing();

-  // final float characterSpacing =

-  // graphicsState.getTextState().getCharacterSpacing();

-  // float wordSpacingDisplacement = 0;

-  //      

-  // PDFont font = graphicsState.getTextState().getFont();

-  //      

-  // //This will typically be 1000 but in the case of a type3 font

-  // //this might be a different number

-  // float glyphSpaceToTextSpaceFactor = 1f/font.getFontMatrix().getValue( 0, 0

-  // );

-  // Float averageWidth = (Float)fontToAverageWidths.get( font );

-  // if( averageWidth == null )

-  // {

-  // averageWidth = new Float( font.getAverageFontWidth() );

-  // fontToAverageWidths.put( font, averageWidth );

-  // }

-  //

-  // Matrix initialMatrix = new Matrix();

-  // initialMatrix.setValue(0,0,1);

-  // initialMatrix.setValue(0,1,0);

-  // initialMatrix.setValue(0,2,0);

-  // initialMatrix.setValue(1,0,0);

-  // initialMatrix.setValue(1,1,1);

-  // initialMatrix.setValue(1,2,0);

-  // initialMatrix.setValue(2,0,0);

-  // initialMatrix.setValue(2,1,rise);

-  // initialMatrix.setValue(2,2,1);

-  //

-  //

-  // //this

-  // int codeLength = 1;

-  // Matrix ctm = graphicsState.getCurrentTransformationMatrix();

-  //      

-  // //lets see what the space displacement should be

-  // spaceDisplacement = (font.getFontWidth( SPACE_BYTES, 0, 1

-  // )/glyphSpaceToTextSpaceFactor);

-  // if( spaceDisplacement == 0 )

-  // {

-  // spaceDisplacement =

-  // (averageWidth.floatValue()/glyphSpaceToTextSpaceFactor);

-  // //The average space width appears to be higher than necessary

-  // //so lets make it a little bit smaller.

-  // spaceDisplacement *= .80f;

-  // if( log.isDebugEnabled() )

-  // {

-  // log.debug( "Font: Space From Average=" + spaceDisplacement );

-  // }

-  // }

-  // int pageRotation = page.findRotation();

-  //      

-  // // very strange.... the ctms are multiplied by right, but suddenly the

-  // textM is multiplied from the left.

-  // // but: PDF matrices are multiplied from left ==> ctm is wrong

-  // Matrix trm = initialMatrix.multiply( textMatrix ).multiply( ctm );

-  // float x = trm.getValue(2,0);

-  // float y = trm.getValue(2,1);

-  // float flipped_y = -y + page.findMediaBox().getHeight();

-  // if( pageRotation == 0 )

-  // {

-  // trm.setValue( 2,1, flipped_y );

-  // }

-  // else if( pageRotation == 90 )

-  // {

-  // trm.setValue( 2,0, y );

-  // trm.setValue( 2,1, x );

-  // }

-  // else if( pageRotation == 270 )

-  // {

-  // trm.setValue( 2,0, flipped_y );

-  // trm.setValue( 2,1, x );

-  // }

-  // for( int i=0; i<string.length; i+=codeLength )

-  // {

-  // if( log.isDebugEnabled() )

-  // {

-  // log.debug( "initialMatrix=" + initialMatrix );

-  // log.debug( "textMatrix=" + textMatrix );

-  // log.debug( "initialMatrix.multiply( textMatrix )=" +

-  // initialMatrix.multiply( textMatrix ) );

-  // log.debug( "ctm=" + ctm );

-  // log.debug( "trm=" + initialMatrix.multiply( textMatrix ).multiply( ctm ) );

-  // }

-  // codeLength = 1;

-  //

-  // String c = font.encode( string, i, codeLength );

-  //

-  // if( log.isDebugEnabled() )

-  // {

-  // log.debug( "Character Code=" + string[i] + "='" + c + "'" );

-  // }

-  // if( c == null && i+1<string.length)

-  // {

-  // //maybe a multibyte encoding

-  // codeLength++;

-  // if( log.isDebugEnabled() )

-  // {

-  // log.debug( "Multibyte Character Code=" + string[i] + string[i+1] );

-  // }

-  // c = font.encode( string, i, codeLength );

-  // }

-  // stringResult.append( c );

-  //

-  // //todo, handle horizontal displacement

-  // characterDisplacement += (font.getFontWidth( string, i, codeLength

-  // )/glyphSpaceToTextSpaceFactor);

-  //

-  //

-  // // PDF Spec - 5.5.2 Word Spacing

-  // //

-  // // Word spacing works the same was as character spacing, but applies

-  // // only to the space character, code 32.

-  // //

-  // // Note: Word spacing is applied to every occurrence of the single-byte

-  // // character code 32 in a string. This can occur when using a simple

-  // // font or a composite font that defines code 32 as a single-byte code.

-  // // It does not apply to occurrences of the byte value 32 in multiple-byte

-  // // codes.

-  // //

-  // // RDD - My interpretation of this is that only character code 32's that

-  // // encode to spaces should have word spacing applied. Cases have been

-  // // observed where a font has a space character with a character code

-  // // other than 32, and where word spacing (Tw) was used. In these cases,

-  // // applying word spacing to either the non-32 space or to the character

-  // // code 32 non-space resulted in errors consistent with this

-  // interpretation.

-  // //

-  //          

-  // boolean withCS = false;

-  // if( (string[i] == 0x20) && c.equals( " " ) )

-  // {

-  // spacing += wordSpacing + characterSpacing;

-  // withCS = true;

-  // }

-  // else

-  // {

-  // spacing += characterSpacing;

-  // }

-  //

-  // if( log.isDebugEnabled() )

-  // {

-  // log.debug( "Checking code '" + c + "' font=" +

-  // graphicsState.getTextState().getFont() +

-  // " Tc=" + characterSpacing +

-  // " Tw=" + wordSpacing +

-  // " fontSize=" + fontSize +

-  // " horizontalScaling=" + horizontalScaling +

-  // " totalDisp=" + characterDisplacement +

-  // " spacing=" + spacing + "(" + withCS + ")" );

-  // }

-  // // We want to update the textMatrix using the width, in text space units.

-  // //

-  //          

-  // }

-  //      

-  // //The adjustment will always be zero. The adjustment as shown in the

-  // //TJ operator will be handled separately.

-  // float adjustment=0;

-  // //todo, need to compute the horizontal displacement

-  // float ty = 0;

-  // float tx =

-  // ((characterDisplacement-adjustment/glyphSpaceToTextSpaceFactor)*fontSize +

-  // spacing)

-  // *horizontalScaling;

-  //      

-  // if( log.isDebugEnabled() )

-  // {

-  // log.debug( "disp=" + characterDisplacement + " adj=" + adjustment +

-  // " fSize=" + fontSize + " tx=" + tx );

-  // }

-  //      

-  // float xScale = trm.getXScale();

-  // float yScale = trm.getYScale();

-  // float xPos = trm.getXPosition();

-  // float yPos = trm.getYPosition();

-  // spaceWidth = spaceDisplacement * xScale * fontSize;

-  // wordSpacingDisplacement = wordSpacing*xScale * fontSize;

-  // Matrix td = new Matrix();

-  // td.setValue( 2, 0, tx );

-  // td.setValue( 2, 1, ty );

-  //      

-  // if( log.isDebugEnabled() )

-  // {

-  // log.debug( "TRM=" + trm );

-  // log.debug( "TextMatrix before " + textMatrix );

-  // }

-  // float xPosBefore = textMatrix.getXPosition();

-  // float yPosBefore = textMatrix.getYPosition();

-  // textMatrix = td.multiply( textMatrix );

-  // if( log.isDebugEnabled() )

-  // {

-  // log.debug( "TextMatrix after " + textMatrix );

-  // }

-  // float totalStringDisplacement = 0;

-  // if( pageRotation == 0 )

-  // {

-  // totalStringDisplacement = (textMatrix.getXPosition() - xPosBefore);

-  // }

-  // else if( pageRotation == 90 )

-  // {

-  // totalStringDisplacement = (textMatrix.getYPosition() - yPosBefore);

-  // }

-  // else if( pageRotation == 270 )

-  // {

-  // totalStringDisplacement = (yPosBefore - textMatrix.getYPosition());

-  // }

-  // showCharacter(

-  // new TextPosition(

-  // xPos,

-  // yPos,

-  // xScale,

-  // yScale,

-  // totalStringDisplacement,

-  // spaceWidth,

-  // stringResult.toString(),

-  // graphicsState.getTextState().getFont(),

-  // graphicsState.getTextState().getFontSize(),

-  // wordSpacingDisplacement ));

-  // }

-  //  

 

   protected void processOperator(PDFOperator operator, List arguments) throws IOException

   {

@@ -338,6 +96,7 @@ public class PDFPage extends PDFTextStripper
     super.processOperator(operator, arguments);

   }

 

+  // exthex

   /**

    * A method provided as an event interface to allow a subclass to perform some

    * specific functionality when a character needs to be displayed. This method

@@ -429,7 +188,16 @@ public class PDFPage extends PDFTextStripper
         

         Pos [] transformed_coordinates = transtormCoordinates(coordinates, ctm);

         

+        /**********************************************************

+         * pdf-as fix:

+         * calculating min and max point of an image to look where

+         * the signature should be placed

+         * fix solves problems with footer and images and

+         * placement of the signature in an image only pdf document

+         **********************************************************/

+        

         float actual_lowest_point = Float.NaN;

+        float actual_starting_point = Float.NaN;

         

         int pageRotation = page.findRotation();

         logger_.debug("PageRotation = " + pageRotation);

@@ -439,38 +207,44 @@ public class PDFPage extends PDFTextStripper
           logger_.debug("min_y = " + min_y);

           float page_height = page.findMediaBox().getHeight();

           logger_.debug("page_height = " + page_height);

-

+          

           actual_lowest_point = page_height - min_y;

+          actual_starting_point = page_height - findMaxY(transformed_coordinates);

         }

         if (pageRotation == 90)

         {

           float max_x = findMaxX(transformed_coordinates);

           logger_.debug("max_x = " + max_x);

-//          float page_width = page.findMediaBox().getWidth();

-//          logger_.debug("page_width = " + page_width);

+          float page_width = page.findMediaBox().getWidth();

+          logger_.debug("page_width = " + page_width);

 

           actual_lowest_point = max_x;

+          actual_starting_point = findMinX(transformed_coordinates);   

         }

         if (pageRotation == 180)

         {

           float min_y = findMinY(transformed_coordinates);

           logger_.debug("min_y = " + min_y);

-          actual_lowest_point = min_y;

+          float page_height = page.findMediaBox().getHeight();

+          actual_lowest_point = page_height - findMaxY(transformed_coordinates);

+          actual_starting_point = page_height - min_y;

         }

         if (pageRotation == 270)

         {

           float min_x = findMinX(transformed_coordinates);

           logger_.debug("min_x = " + min_x);

-//          float page_width = page.findMediaBox().getWidth();

-//          logger_.debug("page_width = " + page_width);

-

-          actual_lowest_point = min_x;

+          

+          float page_width = page.findMediaBox().getWidth();

+          logger_.debug("page_width = " + page_width);

+          

+          actual_lowest_point = page_width - min_x;

+          actual_starting_point = page_width - findMaxX(transformed_coordinates);   

         }

 

         

         logger_.debug("actual_lowest_point = " + actual_lowest_point);

         

-        if (actual_lowest_point > PDFPage.this.footer_line)

+        if (actual_lowest_point > PDFPage.this.footer_line && actual_starting_point > PDFPage.this.footer_line)

         {

           logger_.debug("image is below footer_line. footer_line = " + PDFPage.this.footer_line);

           return;

@@ -533,6 +307,17 @@ public class PDFPage extends PDFTextStripper
     }

     return min;

   }

+  

+	public static float findMaxY(Pos[] coordinates) {

+		float max = 0;

+		for (int i = 0; i < coordinates.length; i++) {

+			if (coordinates[i].y > max) {

+				max = coordinates[i].y;

+			}

+		}

+		return max;

+	}

+  

   public static float findMaxX (Pos [] coordinates)

   {

     float max = Float.NEGATIVE_INFINITY;