Caching highlights outside of PDF file

Caching highlights outside of PDF file 8 years 10 months ago #10800

ruslan.iskhakov
Topic Author
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Posts: 9
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Hello.

I would like to let user create his own selections in PDF file, then when user opens this PDF file again he can see exactly the same highlights restored from cache.
The PDF file should't be changed, all highlights should be cached outside of the PDF, in SQL DB for example,
Does the SDK provides such feature? Is it possible to modify something to add this functionality? Would it be possible to take a look at some code snippets?

Thanks in advance,
Ruslan

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Caching highlights outside of PDF file 8 years 10 months ago #10802

Davide
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Posts: 814
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Hi,
I suggest you to save the coordinates of first and last character of the highlighted text, the page number and then re-create the highlight when you re-open the pdf.
To calculate the first (m_index1) and last (m_index2) char index :

float pt[] = new float[2];
		pt[0] = m_annot_pos.x;
		pt[1] =  m_annot_pos.y;
		m_index1 = m_page.ObjsGetCharIndex(pt);
		pt[0] = m_annot_page.ToPDFX(event.getX(), m_layout.vGetX());
		pt[1] = m_annot_page.ToPDFY(event.getY(), m_layout.vGetY());
		m_index2 = m_page.ObjsGetCharIndex(pt);

You should look at PDFLayoutView.onTouchSelect to better understand how it works.

I suggest you to check this line of code to re-create the highlight :

m_page.AddAnnotMarkup(m_index1, m_index2, type);

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Caching highlights outside of PDF file 8 years 6 months ago #11260

mrawy
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Junior Member
Posts: 20
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Hi,
Where can i write this code?
I want to implement highlight and underline annotations manually using this method

page.AddAnnotMarkup(index1, index2, TYPE);

Instead of this method

pdfView.vSetSelMarkup(TYPE);

I tried something like that but the

page.ObjsGetCharIndex(pt)

method always return -1:

@Override
    public void OnPDFSelecting(Canvas canvas, int[] rect1, int[] rect2) {

        Paint paint = new Paint();

        paint.setColor(Color.parseColor(mSelectingColor));

        if (rect2[1] > rect1[3]) {

            canvas.drawCircle(rect1[0], rect1[1], 5, paint);

            canvas.drawCircle(rect2[2], rect2[3], 5, paint);

            mTargetPosition = pdfView.vGetPos(rect1[0], rect1[1]);

            mStartSelectedTextX = rect1[0];

            mStartSelectedTextY = rect1[1];

            mEndSelectedTextX = rect2[2];

            mEndSelectedTextY = rect2[3];

        } else {

            canvas.drawCircle(rect2[0], rect2[1], 5, paint);

            canvas.drawCircle(rect1[2], rect1[3], 5, paint);

            mTargetPosition = pdfView.vGetPos(rect2[0], rect2[1]);

            mStartSelectedTextX = rect2[0];

            mStartSelectedTextY = rect2[1];

            mEndSelectedTextX = rect1[2];

            mEndSelectedTextY = rect1[3];

        }

    }

@Override
    public void OnPDFSelectEnd() {

        PDFView.PDFPos pos = pdfView.vGetPos((int) mStartSelectedTextX, (int) mStartSelectedTextY);

        PDFVPage vPage = pdfView.vGetPage(pos.pageno);

        Page page = vPage.GetPage();

        int index1 = -1, index2 = -1;

        if (page != null) {

            float pt[] = new float[2];

            pt[0] = mStartSelectedTextX;

            pt[1] = mStartSelectedTextY;

            index1 = page.ObjsGetCharIndex(pt);

            pt[0] = vPage.ToPDFX(mEndSelectedTextX, pdfView.vGetX());

            pt[1] = vPage.ToPDFY(mEndSelectedTextY, pdfView.vGetY());

            index2 = page.ObjsGetCharIndex(pt);

        }

        if (index1 != -1 && index2 != -1) {

            boolean result = page.AddAnnotMarkup(index1, index2, Constants.HIGHLIGHT_TYPE);

            pdfView.vRenderSync(vPage);

            pdfSave();

            setAnnotationColor(Color.parseColor(mHighlightColor));

            mPdfReaderListener.onHighlightEnd(result,
                    mTargetPosition.pageno + 1,
                    mHighlightColor,
                    mStartSelectedTextX, mStartSelectedTextY,
                    mEndSelectedTextX, mEndSelectedTextY);

        }

    }

Kindly advice

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Last edit: by mrawy.

Caching highlights outside of PDF file 8 years 6 months ago #11266

Davide Offline User is blocked Posts: 814 Thank you received: 65	Hi, you have to call page.ObjsStart(); before using page.ObjsGetCharIndex(pt) For more info check this : www.radaeepdf.com/documentation/javadocs...age.html#ObjsStart--
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Caching highlights outside of PDF file 8 years 6 months ago #11267

mrawy
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Junior Member
Posts: 20
Thank you received: 0

Hi,
I modified the OnPDFSelecting and OnPDFSelectEnd methods in PDFReader class to be like this:

public void OnPDFSelecting(Canvas canvas, int[] rect1, int[] rect2)
	{
		Paint paint = new Paint();
		paint.setARGB(0x80, 0, 0, 0x80);
		if( rect2[1] > rect1[3] )
		{
			canvas.drawCircle( rect1[0], rect1[1], 5, paint);
			canvas.drawCircle( rect2[2], rect2[3], 5, paint);
			float[] rect = new float[3];
			rect[0] = rect1[0];
			rect[1] = rect1[1];
			rect[2] = rect2[2];
			rect[3] = rect2[3];
			myRects = rect;
		}
		else
		{
			canvas.drawCircle( rect2[0], rect2[1], 5, paint);
			canvas.drawCircle( rect1[2], rect1[3], 5, paint);
			float[] rect = new float[4];
			rect[0] = rect2[0];
			rect[1] = rect2[1];
			rect[2] = rect1[2];
			rect[3] = rect1[3];
			myRects = rect;
		}
	}

public void OnPDFSelectEnd()
	{
		PDFPos pos = m_view.vGetPos((int)myRects[0], (int)myRects[1]);
		PDFVPage vpage = m_view.vGetPage(pos.pageno);
		Page page = vpage.GetPage();
		if( page != null )
		{
			page.ObjsStart();
			float pt[] = new float[2];
			pt[0] = pos.x;
			pt[1] = pos.y;
			int m_index1 = page.ObjsGetCharIndex(pt);
			pt[0] = vpage.ToPDFX(myRects[2], m_view.vGetX());
			pt[1] = vpage.ToPDFY(myRects[3], m_view.vGetY());
			int m_index2 = page.ObjsGetCharIndex(pt);
			page.AddAnnotMarkup(m_index1, m_index2, 0);
			m_view.vRenderSync(vpage);
			if( m_listener != null )
				m_listener.OnPageModified(vpage.GetPageNo());
		}

//		if( m_listener != null )
//			m_listener.OnSelectEnd(m_view.vGetSel());
	}

And it's working but i still have a problem. I selected the "Linux Fundamentals" statement but the result is "inux Fundamental"

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Caching highlights outside of PDF file 8 years 6 months ago #11276

nermeen
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Platinum Member
Posts: 962
Thank you received: 87

Dear Mrawy,

You can call the following methods before: page.AddAnnotMarkup(m_index1, m_index2, 0);

m_index1 = m_page.ObjsAlignWord(m_index1, -1);
m_index2 = m_page.ObjsAlignWord(m_index2, 1);

Note:

/**
	 * get index aligned by word. this can be invoked after ObjsStart
	 * @param from 0 based unicode index.
	 * @param dir if dir < 0,  get start index of the word. otherwise get last index of the word.
	 * @return new index value.
	 */
    final public int ObjsAlignWord( int from, int dir )  {}

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TOPIC:

Caching highlights outside of PDF file 8 years 10 months ago #10800

Caching highlights outside of PDF file 8 years 10 months ago #10802

Caching highlights outside of PDF file 8 years 6 months ago #11260

Caching highlights outside of PDF file 8 years 6 months ago #11266

Caching highlights outside of PDF file 8 years 6 months ago #11267

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Caching highlights outside of PDF file 8 years 6 months ago #11276