990 lines
23 KiB
HTML
990 lines
23 KiB
HTML
<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
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<meta name="generator" content="AsciiDoc 10.2.0">
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<meta name="keywords" content="LADI, canvas, LANV, lacanvas, flowcanvas, Ganv, HoustonPatchbay, GooCanvas, Cairographics">
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<title>LANV, lacanvas, LADI Canvas</title>
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<style type="text/css">
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/*
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* AsciiDoc 'ladi' theme, based on 'volnitsky' theme for xhtml11 and html5 backends.
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* Based on css from http://volnitsky.com, which was in turn based on default
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* theme from AsciiDoc
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*
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* FIXME: The styling is still a bit rough in places.
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*
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*/
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/* Default font. */
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body {
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font-family: Georgia,"Times New Roman",Times,serif;
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font-size: 16pt;
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}
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/* Title font. */
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h1, h2, h3, h4, h5, h6,
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div.title, caption.title,
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thead, p.table.header,
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#toctitle,
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#author, #revnumber, #revdate, #revremark,
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#footer {
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font-family: Candara,Arial,sans-serif;
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}
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a.image { border-bottom: 0; }
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#toc a {
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border-bottom: 1px dotted #999999;
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color: #3A3A4D !important;
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text-decoration: none !important;
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}
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#toc a:hover {
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border-bottom: 1px solid #6D4100;
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color: #6D4100 !important;
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text-decoration: none !important;
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}
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a { color: #666688; text-decoration: none; border-bottom: 1px dotted #666688; }
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a:visited { color: #615FA0; border-bottom: 1px dotted #615FA0; }
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a:hover { color: #6D4100; border-bottom: 1px solid #6D4100; }
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em {
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font-style: italic;
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color: #444466;
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}
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strong {
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font-weight: bold;
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color: #444466;
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}
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h1, h2, h3, h4, h5, h6 {
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color: #666688;
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margin-bottom: 0.5em;
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margin-right: 1em;
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line-height: 1.3;
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letter-spacing:+0.15em;
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}
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h1, h2, h3, h4, h5, h6 {
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margin-left: 0em;
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}
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/* h1 { margin-left: 2em; } */
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h2 { margin-left: 2em; }
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/* h3 { margin-left: 4em; } */
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/* h4 { margin-left: 5em; } */
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/* h5 { margin-left: 6em; } */
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/* h6 { margin-left: 7em; } */
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h2 { border-bottom: 4px solid #ccd; }
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h3 { border-bottom: 2px dotted #ccd; }
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/* h2, h3 { border-bottom: 2px solid #ccd; } */
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/* h2 { padding-top: 0.5em; } */
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/* h3 { float: left; } */
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/* h3 + * { clear: left; } */
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div.banner {
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background: #004455;
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text-align: center;
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color: #C6E9AF;
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padding: 0;
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margin: 0;
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}
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div.sectionbody {
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margin-top: 0;
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margin-left: 3em;
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margin-right: 1em;
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margin-bottom: 1em;
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}
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hr {
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border: 1px solid #444466;
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}
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p {
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margin-left: 0.5em;
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margin-right: 0.5em;
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margin-top: 0.5em;
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margin-bottom: 0.5em;
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}
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ul, ol, li > p {
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margin-top: 0;
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}
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pre {
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padding: 0;
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margin: 0;
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}
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#author {
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color: #444466;
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font-weight: bold;
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font-size: 1.1em;
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}
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#footer {
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font-size: small;
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border-top: 2px solid silver;
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margin: 0;
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}
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#footer-text {
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/* float: left; */
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padding: 1em;
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text-align: center;
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}
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#footer-badges {
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float: right;
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padding: 0.5em;
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}
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#preamble {
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margin-top: 1.5em;
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margin-bottom: 1.5em;
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}
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div.tableblock, div.imageblock, div.exampleblock, div.verseblock,
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div.quoteblock, div.literalblock, div.listingblock, div.sidebarblock,
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div.admonitionblock {
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margin-top: 1.5em;
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margin-bottom: 1.5em;
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}
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div.admonitionblock {
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margin-top: 2.5em;
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margin-bottom: 2.5em;
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}
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#content { /* Block element content. */
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margin: 2em;
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}
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/* Block element titles. */
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div.title, caption.title {
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color: #444466;
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font-weight: bold;
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text-align: left;
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margin-top: 1.0em;
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margin-bottom: 0.5em;
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}
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div.title + * {
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margin-top: 0;
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}
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td div.title:first-child {
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margin-top: 0.0em;
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}
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div.content div.title:first-child {
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margin-top: 0.0em;
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}
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div.content + div.title {
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margin-top: 0.0em;
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}
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div.sidebarblock > div.content {
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background: #ffffee;
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border: 1px solid silver;
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padding: 0.5em;
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}
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div.listingblock > div.content {
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border: 1px solid silver;
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background: #f4f4f4;
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padding: 0.5em;
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}
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div.quoteblock {
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padding-left: 2.0em;
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margin-right: 10%;
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}
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div.quoteblock > div.attribution {
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padding-top: 0.5em;
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text-align: right;
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}
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div.verseblock {
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padding-left: 2.0em;
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margin-right: 10%;
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}
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div.verseblock > pre.content {
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font-family: inherit;
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}
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div.verseblock > div.attribution {
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padding-top: 0.75em;
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text-align: left;
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}
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/* DEPRECATED: Pre version 8.2.7 verse style literal block. */
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div.verseblock + div.attribution {
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text-align: left;
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}
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div.admonitionblock .icon {
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vertical-align: top;
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font-size: 1.1em;
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font-weight: bold;
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text-decoration: underline;
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color: #444466;
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padding-right: 0.5em;
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}
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div.admonitionblock td.content {
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padding-left: 0.5em;
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border-left: 2px solid silver;
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}
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div.exampleblock > div.content {
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border-left: 2px solid silver;
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padding: 0.5em;
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}
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div.imageblock div.content { padding-left: 0; }
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span.image img { border-style: none; }
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a.image:visited { color: white; }
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dl {
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margin-top: 0.8em;
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margin-bottom: 0.8em;
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}
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dt {
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margin-top: 0.5em;
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margin-bottom: 0;
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font-style: normal;
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color: #444466;
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}
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dd > *:first-child {
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margin-top: 0.1em;
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}
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ul, ol {
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list-style-position: outside;
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}
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ol.arabic {
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list-style-type: decimal;
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}
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ol.loweralpha {
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list-style-type: lower-alpha;
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}
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ol.upperalpha {
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list-style-type: upper-alpha;
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}
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ol.lowerroman {
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list-style-type: lower-roman;
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}
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ol.upperroman {
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list-style-type: upper-roman;
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}
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div.compact ul, div.compact ol,
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div.compact p, div.compact p,
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div.compact div, div.compact div {
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margin-top: 0.1em;
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margin-bottom: 0.1em;
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}
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div.tableblock > table {
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border: 3px solid #444466;
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}
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thead {
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font-weight: bold;
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color: #444466;
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}
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tfoot {
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font-weight: bold;
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}
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td > div.verse {
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white-space: pre;
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}
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p.table {
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margin-top: 0;
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}
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/* Because the table frame attribute is overridden by CSS in most browsers. */
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div.tableblock > table[frame="void"] {
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border-style: none;
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}
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div.tableblock > table[frame="hsides"] {
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border-left-style: none;
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border-right-style: none;
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}
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div.tableblock > table[frame="vsides"] {
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border-top-style: none;
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border-bottom-style: none;
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}
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div.hdlist {
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margin-top: 0.8em;
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margin-bottom: 0.8em;
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}
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div.hdlist tr {
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padding-bottom: 15px;
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}
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dt.hdlist1.strong, td.hdlist1.strong {
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font-weight: bold;
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}
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td.hdlist1 {
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vertical-align: top;
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font-style: normal;
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padding-right: 0.8em;
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color: #444466;
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}
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td.hdlist2 {
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vertical-align: top;
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}
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div.hdlist.compact tr {
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margin: 0;
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padding-bottom: 0;
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}
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.comment {
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background: yellow;
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}
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@media print {
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#footer-badges { display: none; }
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}
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#toctitle {
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color: #666688;
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font-size: 1.2em;
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font-weight: bold;
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margin-top: 1.0em;
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margin-bottom: 0.1em;
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}
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div.toclevel1, div.toclevel2, div.toclevel3, div.toclevel4 { margin-top: 0; margin-bottom: 0; }
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div.toclevel1 { margin-top: 0.3em; margin-left: 0; font-size: 1.0em; }
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div.toclevel2 { margin-top: 0.25em; margin-left: 2em; font-size: 0.9em; }
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div.toclevel3 { margin-left: 4em; font-size: 0.8em; }
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div.toclevel4 { margin-left: 6em; font-size: 0.8em; }
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body {
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margin: 0;
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padding: 0;
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}
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.monospaced, tt, div.listingblock > div.content {
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font-family: Consolas, "Andale Mono", "Courier New", monospace;
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color: #004400;
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background: #f4f4f4;
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max-width: 80em;
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line-height: 1.2em;
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}
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#header {
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text-align: center;
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margin: 2em;
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}
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#toc {
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text-align: left;
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margin-left: 3em;
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max-width: 80%;
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}
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.paragraph p {
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line-height: 1.5em;
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/* margin: 1em; */
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}
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.paragraph p, li, dd, .content { max-width: 80em; }
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.admonitionblock { max-width: 35em; }
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div.sectionbody div.ulist > ul > li {
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list-style-type: square;
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color: #aaa;
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}
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div.sectionbody div.ulist > ul > li > * {
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color: black;
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/*font-size: 50%;*/
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}
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div.sectionbody div.ulist > ul > li div.ulist > ul > li {
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color: #ccd ;
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}
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div.sectionbody div.ulist > ul > li div.ulist > ul > li > * {
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color: black ;
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}
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em {
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font-style: normal ! important;
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font-weight: bold ! important;
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color: #662222 ! important;
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letter-spacing:+0.08em ! important;
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}
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span.underline { text-decoration: underline; }
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span.overline { text-decoration: overline; }
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span.line-through { text-decoration: line-through; }
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/*
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* html5 specific
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*
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* */
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table.tableblock {
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margin-top: 1.0em;
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margin-bottom: 1.5em;
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}
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thead, p.tableblock.header {
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font-weight: bold;
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color: #666688;
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}
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p.tableblock {
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margin-top: 0;
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}
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table.tableblock {
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border-width: 3px;
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border-spacing: 0px;
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border-style: solid;
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border-color: #444466;
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border-collapse: collapse;
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}
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th.tableblock, td.tableblock {
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border-width: 1px;
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padding: 4px;
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border-style: solid;
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border-color: #444466;
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}
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table.tableblock.frame-topbot {
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border-left-style: hidden;
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border-right-style: hidden;
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}
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table.tableblock.frame-sides {
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border-top-style: hidden;
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border-bottom-style: hidden;
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}
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table.tableblock.frame-none {
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border-style: hidden;
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}
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th.tableblock.halign-left, td.tableblock.halign-left {
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text-align: left;
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}
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th.tableblock.halign-center, td.tableblock.halign-center {
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text-align: center;
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}
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th.tableblock.halign-right, td.tableblock.halign-right {
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text-align: right;
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}
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th.tableblock.valign-top, td.tableblock.valign-top {
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vertical-align: top;
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}
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th.tableblock.valign-middle, td.tableblock.valign-middle {
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vertical-align: middle;
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}
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th.tableblock.valign-bottom, td.tableblock.valign-bottom {
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vertical-align: bottom;
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}
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</style>
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<script type="text/javascript">
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/*<![CDATA[*/
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var asciidoc = { // Namespace.
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/////////////////////////////////////////////////////////////////////
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// Table Of Contents generator
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/////////////////////////////////////////////////////////////////////
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/* Author: Mihai Bazon, September 2002
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* http://students.infoiasi.ro/~mishoo
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*
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* Table Of Content generator
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* Version: 0.4
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*
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* Feel free to use this script under the terms of the GNU General Public
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* License, as long as you do not remove or alter this notice.
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*/
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/* modified by Troy D. Hanson, September 2006. License: GPL */
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/* modified by Stuart Rackham, 2006, 2009. License: GPL */
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// toclevels = 1..4.
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toc: function (toclevels) {
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function getText(el) {
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var text = "";
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for (var i = el.firstChild; i != null; i = i.nextSibling) {
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if (i.nodeType == 3 /* Node.TEXT_NODE */) // IE doesn't speak constants.
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text += i.data;
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else if (i.firstChild != null)
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text += getText(i);
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}
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return text;
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}
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function TocEntry(el, text, toclevel) {
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this.element = el;
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this.text = text;
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this.toclevel = toclevel;
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}
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function tocEntries(el, toclevels) {
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var result = new Array;
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var re = new RegExp('[hH]([1-'+(toclevels+1)+'])');
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// Function that scans the DOM tree for header elements (the DOM2
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// nodeIterator API would be a better technique but not supported by all
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// browsers).
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var iterate = function (el) {
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for (var i = el.firstChild; i != null; i = i.nextSibling) {
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if (i.nodeType == 1 /* Node.ELEMENT_NODE */) {
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var mo = re.exec(i.tagName);
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if (mo && (i.getAttribute("class") || i.getAttribute("className")) != "float") {
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result[result.length] = new TocEntry(i, getText(i), mo[1]-1);
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}
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iterate(i);
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}
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}
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}
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iterate(el);
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return result;
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}
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var toc = document.getElementById("toc");
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if (!toc) {
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return;
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}
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// Delete existing TOC entries in case we're reloading the TOC.
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var tocEntriesToRemove = [];
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var i;
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for (i = 0; i < toc.childNodes.length; i++) {
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var entry = toc.childNodes[i];
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if (entry.nodeName.toLowerCase() == 'div'
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&& entry.getAttribute("class")
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&& entry.getAttribute("class").match(/^toclevel/))
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tocEntriesToRemove.push(entry);
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}
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for (i = 0; i < tocEntriesToRemove.length; i++) {
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toc.removeChild(tocEntriesToRemove[i]);
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}
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// Rebuild TOC entries.
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var entries = tocEntries(document.getElementById("content"), toclevels);
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for (var i = 0; i < entries.length; ++i) {
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var entry = entries[i];
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/////////////////////////////////////////////////////////////////////
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|
|
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|
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|
/*]]>*/
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|
</script>
|
|
</head>
|
|
<body class="article">
|
|
<div id="header">
|
|
<h1>LANV, lacanvas, LADI Canvas</h1>
|
|
</div>
|
|
<div id="content">
|
|
<div id="preamble">
|
|
<div class="sectionbody">
|
|
<div class="admonitionblock">
|
|
<table><tr>
|
|
<td class="icon">
|
|
<img alt="Note" src="data:image/png;base64,
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|
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|
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|
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GqpKCIE8z5mdnUVVqVarbN++nba2Nvbu3csDDzyAqrJ8+atb+zjn6e/vZ/Xq1axatYq1a9fS29tL
|
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lmUMDQ1RKpXOm9EXvV6v1+tWr9eZnp5mZmaGWq1GjLHF62aiNZ+bnPfe45xrvTZzxMyYmZk56+LX
|
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|
|
PAr9L8j/96+U/w3yCoCXW14B8HLLvwDd67nwZIEPdgAAAABJRU5ErkJggg==">
|
|
</td>
|
|
<td class="content">
|
|
<div class="title">WORK IN PROGRESS</div>This is Work In Progress for adapting
|
|
<a href="https://drobilla.net/software/flowcanvas.html">flowcanvas</a> plus
|
|
<a href="https://ladish.org/">gladish</a> augmentations into new C library
|
|
along with adding new features, like port grouping.
|
|
Beware that in this WIP version of the text,
|
|
present tense may be used for not yet implemented things.</td>
|
|
</tr></table>
|
|
</div>
|
|
<div class="paragraph"><p><a href="https://ladish.org/lanv.html">LANV</a> is project to provide set of
|
|
libraries useful when creating visual representation of graphs on
|
|
raster display.</p></div>
|
|
<div class="paragraph"><p>Canvas drawing of modular DSP/Audio/MIDI flow and
|
|
finite-state machine graphs like:</p></div>
|
|
<div class="ulist"><ul>
|
|
<li>
|
|
<p>
|
|
<a href="https://jackaudio.org/">JACK Audio Connection Kit</a> graphs
|
|
</p>
|
|
</li>
|
|
<li>
|
|
<p>
|
|
graphs of <a href="https://lv2plug.in/">LV2 plugins</a>
|
|
</p>
|
|
</li>
|
|
<li>
|
|
<p>
|
|
graphs of DSP modules in kernel-mode
|
|
</p>
|
|
</li>
|
|
<li>
|
|
<p>
|
|
graphs of DSP modules in FPGA
|
|
</p>
|
|
</li>
|
|
</ul></div>
|
|
<div class="paragraph"><p>API with domain specific semantics at level similar to
|
|
<a href="https://drobilla.net/software/flowcanvas.html">flowcanvas</a>,
|
|
<a href="https://drobilla.net/software/ganv.html">Ganv</a> and
|
|
<a href="https://github.com/Houston4444/HoustonPatchbay">HoustonPatchbay</a>.</p></div>
|
|
<div class="paragraph"><p>Operates on top of lower level canvas library like
|
|
<a href="https://wiki.gnome.org/Projects/GooCanvas">GooCanvas</a>,
|
|
<a href="https://www.freshports.org/graphics/libgnomecanvas/">gnomecanvas</a>
|
|
or <a href="https://www.cairographics.org/">Cairo</a>.</p></div>
|
|
<div class="paragraph"><p>Features:</p></div>
|
|
<div class="ulist"><ul>
|
|
<li>
|
|
<p>
|
|
Minimal dependencies, plain C implementation.
|
|
In particular, C++ runtime library is to be pulled as dependency only
|
|
if C++ bindings are actually used.
|
|
</p>
|
|
</li>
|
|
<li>
|
|
<p>
|
|
flowcanvas/gladish-canvas/ganv/HoustonPatchbay-like domain level API
|
|
</p>
|
|
</li>
|
|
<li>
|
|
<p>
|
|
Libraries that target diverse set of raster UI environments:
|
|
</p>
|
|
<div class="ulist"><ul>
|
|
<li>
|
|
<p>
|
|
X11, especially via libxcb
|
|
</p>
|
|
</li>
|
|
<li>
|
|
<p>
|
|
libnsfb
|
|
</p>
|
|
</li>
|
|
<li>
|
|
<p>
|
|
linux framebuffer
|
|
</p>
|
|
</li>
|
|
<li>
|
|
<p>
|
|
sixel over tty
|
|
</p>
|
|
</li>
|
|
<li>
|
|
<p>
|
|
Hardware accelerated 2D rendering via:
|
|
</p>
|
|
<div class="olist arabic"><ol class="arabic">
|
|
<li>
|
|
<p>
|
|
OpenVG
|
|
</p>
|
|
</li>
|
|
</ol></div>
|
|
</li>
|
|
<li>
|
|
<p>
|
|
Hardware accelerated 3D rendering via:
|
|
</p>
|
|
<div class="olist arabic"><ol class="arabic">
|
|
<li>
|
|
<p>
|
|
OpenGL and GLX
|
|
</p>
|
|
</li>
|
|
<li>
|
|
<p>
|
|
OpenGL ES and EGL
|
|
</p>
|
|
</li>
|
|
</ol></div>
|
|
</li>
|
|
<li>
|
|
<p>
|
|
Widgets for diverse set of GUI toolkits:
|
|
</p>
|
|
<div class="olist arabic"><ol class="arabic">
|
|
<li>
|
|
<p>
|
|
GNOME2/GTK2 (liblanv-gtk2)
|
|
</p>
|
|
</li>
|
|
<li>
|
|
<p>
|
|
GNOME3/GTK3 (liblanv-gtk3)
|
|
</p>
|
|
</li>
|
|
<li>
|
|
<p>
|
|
GNOME40/GTK4
|
|
</p>
|
|
</li>
|
|
<li>
|
|
<p>
|
|
KDE/Qt
|
|
</p>
|
|
</li>
|
|
</ol></div>
|
|
</li>
|
|
</ul></div>
|
|
</li>
|
|
<li>
|
|
<p>
|
|
Usable over range of lower level canvas layers, e.g.:
|
|
</p>
|
|
<div class="ulist"><ul>
|
|
<li>
|
|
<p>
|
|
GooCanvas (liblacanvas-goo-gtk3)
|
|
</p>
|
|
</li>
|
|
<li>
|
|
<p>
|
|
GnomeCanvas2, flowcanvas style (liblacanvas-gnome2)
|
|
</p>
|
|
</li>
|
|
<li>
|
|
<p>
|
|
Cairo, ganv style, but without GTK requirement. (liblacanvas-cairo)
|
|
</p>
|
|
</li>
|
|
</ul></div>
|
|
</li>
|
|
<li>
|
|
<p>
|
|
Port grouping (along with group-connect and group-disconnect)
|
|
</p>
|
|
</li>
|
|
<li>
|
|
<p>
|
|
Native Language Support (via gettext)
|
|
</p>
|
|
</li>
|
|
<li>
|
|
<p>
|
|
Colour theme support, including system-wide theme and custom themes.
|
|
</p>
|
|
</li>
|
|
<li>
|
|
<p>
|
|
Runtime customizable canvas background (liblanv-kilim)
|
|
via wallpaper-like raster or vector images in scaled or pattern mode.
|
|
</p>
|
|
</li>
|
|
<li>
|
|
<p>
|
|
Photo-realistic renderings (liblanv-photo):
|
|
</p>
|
|
<div class="ulist"><ul>
|
|
<li>
|
|
<p>
|
|
rack-mountable (liblanv-rack)
|
|
</p>
|
|
</li>
|
|
<li>
|
|
<p>
|
|
stage-floor (liblanv-floor)
|
|
</p>
|
|
</li>
|
|
</ul></div>
|
|
</li>
|
|
<li>
|
|
<p>
|
|
Language bindings:
|
|
</p>
|
|
<div class="ulist"><ul>
|
|
<li>
|
|
<p>
|
|
Python
|
|
</p>
|
|
</li>
|
|
<li>
|
|
<p>
|
|
Lua
|
|
</p>
|
|
</li>
|
|
<li>
|
|
<p>
|
|
C#
|
|
</p>
|
|
</li>
|
|
<li>
|
|
<p>
|
|
C++
|
|
</p>
|
|
</li>
|
|
<li>
|
|
<p>
|
|
Rust
|
|
</p>
|
|
</li>
|
|
<li>
|
|
<p>
|
|
Vala
|
|
</p>
|
|
</li>
|
|
</ul></div>
|
|
</li>
|
|
</ul></div>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
<div id="footnotes"><hr></div>
|
|
<div id="footer">
|
|
<div id="footer-text">
|
|
Last updated
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2022-09-16 12:17:29 EEST
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