iPad PageList parsing using Javascript.

Oh.Danny.Boy · 05-17-2012, 05:24 PM

I understand this is not specifically a development forum, but I have a question regarding PageList parsing in an iOS environment. (I only see Development area for Kindle/Nook).

PageList and supporting targets are fairly straightforward. A list of anchors referring to their respective file (src), and a playOrder for well, ordering. My question is how do eReaders actually detect when anchors are in view?

For example, a document at 768px wide by 10,000px height may have 20 PageTargets (pg i, pg ii, pg 1, pg 2, pg 3 ... so on). What mechanism are ePub rendering engines on the web, desktop, and specifically iOS using to detect the closest anchor relative to a users position (XY coordinates)?

There seems to be nothing in Javascript or Objective-C which does this. Voodoo functionality.

05-17-2012, 05:24 PM	#1
Oh.Danny.Boy Junior Member Posts: 1 Karma: 10 Join Date: May 2012 Device: none	PageList parsing using Javascript. I understand this is not specifically a development forum, but I have a question regarding PageList parsing in an iOS environment. (I only see Development area for Kindle/Nook). PageList and supporting targets are fairly straightforward. A list of anchors referring to their respective file (src), and a playOrder for well, ordering. My question is how do eReaders actually detect when anchors are in view? For example, a document at 768px wide by 10,000px height may have 20 PageTargets (pg i, pg ii, pg 1, pg 2, pg 3 ... so on). What mechanism are ePub rendering engines on the web, desktop, and specifically iOS using to detect the closest anchor relative to a users position (XY coordinates)? There seems to be nothing in Javascript or Objective-C which does this. Voodoo functionality.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Changing Format Without Parsing	Sidetrack	Conversion	10	04-01-2011 12:47 AM
NCX-pageList: What should it do?	hpstricker	ePub	2	01-25-2011 05:35 AM
iPad Which difference does it make whether I use NCX-pageList or not?	hpstricker	Apple Devices	2	01-24-2011 06:59 PM
Parsing Titles	cgraving	Calibre	3	01-17-2011 02:52 AM
Error parsing attribute name?	seagull	Calibre	1	01-01-2010 11:30 AM