tree 9409760733f00f7e799c88b04ae88c24fc84bde4
parent 4eb03205f9ff7baf6e3fca4f07aef38275b44faa
author Marc Kupietz <kupietz@ids-mannheim.de> 1787726487 +0300
committer Marc Kupietz <kupietz@ids-mannheim.de> 1787726487 +0300

add transcript view ('r') for text-to-speech read-aloud extensions

Read-aloud browser extensions cannot walk a reveal.js deck: slides
outside the current one are display:none and the visible page text is
indexed only once at page load, so such extensions stop after the title
slide. Pressing 'r' now toggles a transcript view -- a single scrollable
page containing every slide's content and speaker notes (overview TOC
lists excluded, fragments shown, rebuilt on every open) -- which
extensions can read from start to finish. Styled in the ids theme;
closes on click or Escape.

Change-Id: Ia3df9dfa68b9699d318d747831ac8a0e270c8271