DenysMedvid/pdf2htmlEX
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Smooth scrolling

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This commit is contained in:
Hongliang TIAN 2012-09-11 21:04:55 +08:00
parent 64a765e90f
commit c2827e2235
4 changed files with 81 additions and 37 deletions
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6
share/all.css
View File

@ -11,9 +11,13 @@
/* for Chrome & Safari */
-webkit-text-stroke-width:0.13px;
}
.pw {
border: 1px solid black;
margin: 13px auto;
overflow: hidden;
}
.p {
position:relative;
margin:13px auto;
background-color:white;
overflow:hidden;
display:block;

37
share/neck.html
View File

@ -1,38 +1,7 @@
<!-- neck.html by WangLu 2012.08.15 -->
<title></title>
<script type="text/javascript">
/* show pages one by one asynchronously */
function show_pages()
{
var pages = document.getElementById('pdf-main').childNodes;
var idx = 0;
var f = function(){
if (idx < pages.length) {
try{
pages[idx].style.display='block';
}catch(e){}
++idx;
setTimeout(f,100);
}
};
f();
};
</script>
<title>pdf2htmlEX</title>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.8.1/jquery.min.js"></script>
</head>
<body onload="show_pages();">
<script type="text/javascript">
/* hide all pages */
(function(){
var s = '.p{display:none;}';
var n = document.createElement("style");
n.type = "text/css";
if (n.styleSheet) {
n.styleSheet.cssText = s;
} else {
n.appendChild(document.createTextNode(s));
}
document.getElementsByTagName("head")[0].appendChild(n);
})();
</script>
<body>
<div id="pdf-main">
<!-- neck.html END -->

68
share/tail.html
View File

@ -1,5 +1,71 @@
<!-- tail.html by WangLu 2012.08.15 -->
<!-- tail.html by Hongliang 2012.09.11 -->
</div>
<script type="text/javascript">
$(function() {
var $pages = $(".p"),
$pageWrappers = $(".pw"),
$main = $("#pdf-main"),
l = $pages.length;
$pages.hide();
function isPageVisible(i, H) {
var $pw = $($pageWrappers[i]),
t = $pw.offset().top,
b = t + $pw.height() ;
return ( ! ( b < 0 || t >= H ) );
}
function setVisibilities(from, to, visible) {
for(var i = from; i <= to; ++i) {
var $p = $($pages[i]);
if(visible) $p.show(); else $p.hide();
}
}
// Selectively rendering of pages that are visible or will be visible
function selectiveRender() {
console.debug('render');
var first = 0, last = l - 1,
H = $main.height();
// Find the first visible page
while(first < l && !isPageVisible(first, H))
first++;
// Find the last visible page
while(last >= 0 && !isPageVisible(last, H))
last--;
console.debug('visible from='+first+", to="+last);
// Set invisible
setVisibilities(first > 0 ? first-1 : first,
last < l -1 ? last + 1 : last, true);
setVisibilities(0, first - 2, false);
setVisibilities(last + 2, l-1, false);
}
// Listen to scrolling events to render proper pages
var scrollTimer = null;
$("#pdf-main").scroll(function() {
// Now
lastScrollTime = Date.now();
// Make sure at most one timer runs
clearInterval(scrollTimer);
// Check when scrolling stops
scrollTimer = setInterval(function() {
// If scrolling pauses 300+ms
if (Date.now() - lastScrollTime > 300) {
clearInterval(scrollTimer);
// Only render pages that are or will be visible
selectiveRender();
}
}, 200);
});
// Trigger the event
$("#pdf-main").scroll();
});
</script>
</body>
</html>
<!-- tail.html END -->

7
src/HTMLRenderer/general.cc
View File

@ -174,6 +174,10 @@ void HTMLRenderer::startPage(int pageNum, GfxState *state)
assert((!line_opened) && "Open line in startPage detected!");
// Add by Hongliang Tian
// wrapper for page
html_fout << "<div class=\"pw\" style=\"width:" << pageWidth << "px;height:" << pageHeight << "px;\">" << endl;
html_fout << "<div id=\"p" << pageNum << "\" class=\"p\" style=\"width:" << pageWidth << "px;height:" << pageHeight << "px;";
html_fout << "background-image:url(";
@ -221,7 +225,8 @@ void HTMLRenderer::startPage(int pageNum, GfxState *state)
void HTMLRenderer::endPage() {
close_line();
// close page
html_fout << "</div>" << endl;
// Modified by Hongliang Tian
html_fout << "</div>" << endl << "</div>" << endl;
}
void HTMLRenderer::process_single_html()