Am 21.04.2015 um 23:00 schrieb Hesham Gneady:
A sentence could also end with a question mark, exclamation mark, ... Etc.
I think there will be many cases to handle.
I also wonder .. When reading text from the book using PDFTextStripper it
can read the new line characters, right ? TextPosition seems to be reading
the pdf text in a different way.
PDFTextStripper constructs these newline characters from the y positions
of text glyph output, not from existing characters.
PDF isn't something like HTML. It is a complex format for graphic
output. (I wish there was an english translation for "Eierlegende
Wollmilchsau")
Tilman
On Apr 21, 2015 10:40 PM, "Eric Douglas" <[email protected]> wrote:
A proper sentence ends with a period, so text that is one character height
below other text is assumed to be tacked onto the same sentence (with a
space between).
If you have the font, you know the font size, you should be able to
calculate one character height.
If sentences aren't ended with periods, text may be assumed to be a new
sentence on a new line if it's more than a character height down.
ie
A sentence here
Another sentence here
On Tue, Apr 21, 2015 at 4:21 PM, Hesham G. <[email protected]> wrote:
Frank ,
Thanks for explaining this.
What I am trying to do is reading sentences from the PDF using
TextPosition. Your explanation is clear and I can detect the new line
using
X & Y, but what if a sentence is written on 2 lines ? ... Reading the
Y-coordinate for the second line will result with dealing with it as a
new
sentence instead of considering it a completion for the first line of the
sentence.
Best regards ,
Hesham
------------------------------------------------------------------------
Included message :
Hi Hesham,
There is no newline character in a PDF. Only printable characters are
saved, each with its X and Y coordinates.
If you sort the TextPositions by Y and X, you can detect 'newlines' by
finding an increase in Y and a decrease in X. However, this isn't
foolproof, since things like subscripts and superscripts are out of order
when sorted by Y. Where there are multiple columns, this won't work.
Frank
On Wed, Apr 22, 2015 at 7:33 AM, Hesham G. <[email protected]>
wrote:
Hello ,
When reading PDF text using TextPosition, is there a way to know if the
current character is a new line character ?
protected void processTextPosition( TextPosition text ) {
System.out.println( text.getCharacter() ); // Prints space if this
is
a new line character in the PDF file.
}
Best regards ,
Hesham
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