Rdh compute rectangles for svg

[kimtuck]

This pull request is Finalized

Related issue(s) and/or pull request(s)

See #340

Test cases, sample files

Additional information

In some cases, the book may have an image which is surrounded by a svg tag like this: <svg:svg ....><svg:image ....></svg:image></svg:svg> In this case, the containing svg must be used to find the client rectangles. Some epub books have a cover page which is structured like this; with no other content. Without this change, it appears to readium that there is no visible content on the page, because it can't find the first visible cfi.

[danielweck]

Looks good to me. Could you please update the readium-cfi-js repository (as per the latest commit in the develop branch), so that the conflict is resolved? Thanks!

[danielweck]

Let's create / find an EPUB sample to reproduce the associated issue, and let's merge this PR.

• @rkwright

[jccr]

I'm ok with merging this, not sure about the submodule ref update though.

[danielweck]

The cfi_navigation_logic.js file is now in conflict, so we might need to cherry-pick the code change manually (it is quite straight-forward). If so, let's remember to cross-reference this PR and credit @kimtuck for the fix.