I have implemented an iPad application which is actually read the PDF file(using quartz). Now I want to implement the Search Feature and for this I have checked some tutorial some where mentioned using quartz and some where mentioned FastPdfKit. But I don't know which one will be better. I have seen the quartz ( https://developer.apple.com/library/mac/#documentation/GraphicsImaging/Conceptual/drawingwithquartz2d/dq_pdf_scan/dq_pdf_scan.html ).
I have some doubt in this.
the "Callbacks for Operators" what and why we use this?
"Operators Table" what is the purpose of this? and
Where we will put the search text.
Please suggest me in this regards or provide any other open source which I can use.
Thanks in advance.
CGPDFScanner is a fairly low-level API which allows you to selectively scan for various PDF operators and invoke callbacks on each operator. It does require you to have some knowledge of PDF structure, but it will do the job. A PDF operator is a command in a PDF file which does some operation (usually manipulating the drawing state, e.g. writing text, drawing lines, changing graphics state, etc.).
Essentially, you tell the scanner what PDF operators you are interested in, and tell it what callback you want to invoke. In your case, you are interested in the text operators TJ, Tj; see this page for a working text search example using this API, and this question for some other answers on text search.
You may get your answer at FastPdfKit. Please let me know if you still more information. I think this will solve your purpose.
#Subodh S: At the momment, PDFKitten does not support multi-words query. Therefore, your keyword is not searched and highlighted. You must handle yourself in source code and even change some points in PDFKitten.
Related
Is there a good way to implement Rich Text using the existing CCLabel class or another class? I'ma ttempting to render something like the image below
I wasn't able to find any information in the guides on rich text, the wiki entry on CCLabel doesn't mention anything about it, and the documentation doesn't seem to indicate support of rich text. I also didn't find anything searching on these forums for "rich text".
My main problem with concatenating multiple CCLabels together is it makes the word wrapping a challenge. I'm sure if that's the only way to implement this in CocosSharp I can figure it out, but it'd be much nicer to use any built-in support for rich text if it exists.
I know cocos2d-x has support for rich text through their UIRichText class. Does anything like that exist in CocosSharp? Is there a different term I should be searching for, or is there support somewhere in there that I just missed?
With the iOS support for Quartz 2D and its support for the PDF format; should adding a signature image to a pdf be a little easier. I have looked all over and saw people are using the PDFKit, UIView or Core Graphic Library. Which is the easiest and the recommended library for the effort? Also, are there simple examples of the recommend library. When I tried to see how Quartz 2D worked, all I could find are narrative explanations about how it worked and specific method you may use but no complete examples. You know the hello world one. Anyway, I am new to iOS development but been writing code for over 20 years so I might be able to pick this OS up as well.
Can some poor soul have pity on me and please point me in the right direction?
I have done this by loading the old pdf file on view and then add signature on that view and then render the view. check the following post
Add a signature image to a pdf without showing the pdf data to user in iOS
But not able create the pdf which contain existing pdf with signature "without showing on view" .
It's too late to answer this question now. But let me just provide some pointers for people who may bump into this question in future.
This one summarizes PDF handling in iOS pretty well. Good for starters.
http://www.ioslearner.com/generate-pdf-programmatically-iphoneipad/#more-242
This one is also similar, but not very exhaustive. http://www.absoluteripple.com/1/post/2012/03/generating-pdf-in-ios.html
The above links do not talk about handling existing PDFs. I found this stackoverflow answer really useful for that.
Add pdf page to an existing pdf objective-c
Just a note, if you want manipulate existing PDFs, Quartz 2d is the way to go.
Also look at reference pages of CGPDFDocument, CGPDFPage, CGPDFContext and CGContext.
I think I am going to ask very stupid Question here. In my current project i want to give search feature. I have an big image tutorial with lot of information about on a topic and i want to search feature in the image. Suppose use type like "Apple" it will show the Apple occurred how many times in the image and after clicking on of that the image scroll and go to the position where "Apple" is occurred.
Thanks for reading my stupid question but if it is possible let me know and put some sample code??
Here is a broad overview of the approach I would take:
Find a C/C++ based OCR library
Get it to compile on the iPhone
Create a UI to feed images to the OCR library
Store output of OCR, including words found and their location in the image.
Create a UI to allow users to enter a search.
Search OCR output for matches and highlight the location of matches on the image.
I imagine step 2 is going to be the most difficult. Tesseract may work, it is C++ based but I don't know what dependencies it has.
UPDATE: Someone on GitHub has posted a demo iPhone App that uses Tesseract.
Please try to do use WebView or Core Text to render you tutorial, in which search functionality comes pretty much for free. Use OCR for search is just not practical for your need.
I'm currently using Solr with Terms Component and Jquery Autosuggest which works quiet good. However, this construct is limited to one autosuggest word (it autocompletes only the first word). Is it possible to implement a Google like autosuggest with multiple words/terms so i can autocomplete multiple words?
I just wrote a blog post about different ways to make auto complete suggestions with Solr. It's basically a comparison of some different strategies, check it out, it might help.
If you want to make multiple terms suggestions, it turns out you should use, as already mentioned in the other answer you got, the Suggester component available in Solr starting from the 3.1 version. Since it has some limitations, you can also have a look at the ShingleFilterFactory, which generates token NGrams. It creates combination of tokens as a single token, that's useful to suggest multiple words.
You can also use SpellCheckComponent for better auto complete suggests.
See http://wiki.apache.org/solr/Suggester for details.
Edit:
Refer here for solr5 and above
Check this out, it might help
http://www.lucidimagination.com/blog/2009/09/08/auto-suggest-from-popular-queries-using-edgengrams/
I worked out the same task, finally got solved using TermsComponent with multiple fields. check this link. http://lucene.472066.n3.nabble.com/auto-completion-search-with-solr-using-NGrams-in-SOLR-td3998559i20.html
I have several copies of the same PDF file. These copies have annotations in it (Rect type with pop-up comments).
I want to know if I can get all these annotations from these copies and aggregate them into a single master copy using CAM::PDF (or another free tool).
an example to illustrate:
I have file1_userA.pdf and file1_userB.pdf. They are both annotated.
I want to generate file1_allusers.pdf aggregating annotations from both files file1_userA.pdf and file1_userB.pdf.
ps: I have the original un-annotated copy.
-- EDIT (Aug, 4):
I have developed an extension for CAM::PDF, namely CAM::PDF::Annot. It 'use base's CAM::PDF and adds extra functionality regarding Drawing Markup Annotations.
I am in the process of tidying up the code so I can post it to CPAN.
-- EDIT (Aug, 19)
I have finally submitted it to PAUSE, but I am running into some world writable related problems...
In any case, if anyone is interested in taking a look at the code, I will try and make it available somewhere... until then, just PM me and I will mail it to you.
geez, i'm getting such a thrill posting a module to cpan... i found the joy of working in working with Perl...
best regards,
Donato Azevedo
I'm the author of CAM::PDF. I have built only very limited support for annotations to date, specifically just for form field filling. So, no, that's not a supported feature today. The feature you describe is very interesting, though, and I can imagine that others would use it too, so I'd be interested in discussing it further with you offline.