Speed read PDFs with jetzt

## pdf-speedread-convert.sh
#!/bin/bash
# Convert a pdf to html, add Javascript for speed reading

#READPDFLOC="./readPDF"		# Use this if you want to use a local version
READPDFLOC="https://cdn.rawgit.com/mm--/b47c2700b6c63f1598e4/raw/a96388cb3cf89b7a041a63f06a91c2953ee5731c/readPDF.js"

FILE="$1"
HTML="$(basename "$FILE" .pdf).html"

SAVEDDIR=`pwd`
echo SAVEDDIR IS $SAVEDDIR
TMPDIR=`mktemp -d pdfconvert-XXXXXX`

function finish {
    cd "$SAVEDDIR"
    rm -rf "$TMPDIR"
}
trap finish EXIT

cp "$FILE" "$TMPDIR"
cd "$TMPDIR"

SCRIPTFILE="script.txt"
cat > "$SCRIPTFILE" <<EOF
<script data-main="$READPDFLOC" src="https://cdnjs.cloudflare.com/ajax/libs/require.js/2.1.22/require.min.js"></script>
EOF
pdf2htmlEX --zoom 1.5 --process-outline 0 "$FILE"
sed -i "/X-UA-Compatible/ r $SCRIPTFILE" "$HTML"

cp "$HTML" "$SAVEDDIR"

## readPDF.js
// Speed read PDF pages with pdf2htmlEX and jetzt
// Press "n" to go to next page
// Press "p" to go to previous page
// Press "r" to RSVP read the current page
require.config({
    paths: {
	jetzt: 'https://cdn.rawgit.com/ds300/jetzt/master/jetzt-solid.min'
        , jquery: 'https://code.jquery.com/jquery-2.1.4.min'
    },
    shim: {
	    'jetzt': { deps: [ 'css!https://cdn.rawgit.com/ds300/jetzt/master/jetzt.css' ], exports : 'jetzt' }
	  },
  map: {
      '*': {
	  'css': 'https://cdnjs.cloudflare.com/ajax/libs/require-css/0.1.8/css.min.js'
    }
  }
});


define(['jquery', 'jetzt'], function($, jetzt) {
    function quitJetzt() {
	if(jetzt.isOpen())
	    jetzt.quit();
    }

    function highlightNode(node) {
	var sel = window.getSelection();
	var range = document.createRange();
	range.setStartBefore(node);
	range.setEndAfter(node);
	sel.removeAllRanges();
	sel.addRange(range);
    }

    function unhighlight() {
	var sel = window.getSelection();
	sel.removeAllRanges();
    }

    function scrollMe(selector, callback) {
	var st = $("#page-container").scrollTop();
	var newSt = st + $(selector).position().top;
	$("#page-container").animate({ scrollTop: newSt }, 1000, callback);
    };

    var currentPage = function() {
	return window.pdf2htmlEX.defaultViewer.cur_page_idx + 1;
    };

    function scrollTo(pageNum, callback) {
	quitJetzt();
	console.log(pageNum);
	scrollMe("#pf" + pageNum.toString(16), callback);
    }
    var scrollNext = function(callback) {
	scrollTo(currentPage() + 1, callback);
    };

    var scrollPrev = function(callback) {
	scrollTo(Math.max(currentPage() - 1, 1), callback);
    };

    var readNext = function() {
	var cur = currentPage() + 1;
	read("#pf" + cur.toString(16));
    };

    function doRead(place) {
	window.setTimeout(function() {
	    highlightNode($(place + " .opened")[0]);
	    window.setTimeout(function () {
		jetzt.select();
	    }, 500);
	}, 500);
    }
    var readCurrent = function() {
	var cur = currentPage();
	doRead("#pf" + cur.toString(16));
    };

    function getSelectionText() {
	var text = "";
	if (window.getSelection) {
            text = window.getSelection().toString();
	} else if (document.selection && document.selection.type != "Control") {
            text = document.selection.createRange().text;
	}
	return text;
    }

    var read = function(place) {
	if(!place)
	    place = "#pf1";
	quitJetzt();
	scrollMe($(place), function() {
	    doRead(place);
	});
    };

    $( document ).on("keypress", function(e) {
	console.log(e.which);
	switch(e.which) {
	case 110:		// 'n'
	case 78:
	    scrollNext();
	    break;
	case 112:		// 'p'
	case 80:
	    scrollPrev();
	    break;
	case 114:		// 'r'
	case 82:
	    readCurrent();
	    break;
	default:
	    return;
	}
	e.preventDefault();
    });
    window.readPDF = {
	read: read,
	readNext: readNext,
	readCurrent: readCurrent,
	scrollPrev: scrollPrev,
	scrollNext: scrollNext
    };
});