Miniflux.Nav = (function() { function scrollPageTo(item) { var clientHeight = pageYOffset + document.documentElement.clientHeight; var itemPosition = item.offsetTop + item.offsetHeight; if (clientHeight - itemPosition < 0 || clientHeight - item.offsetTop > document.documentElement.clientHeight) { window.scrollTo(0, item.offsetTop - 10); } } function findNextItem() { var items = document.getElementsByTagName("article"); if (! document.getElementById("current-item")) { items[0].id = "current-item"; scrollPageTo(items[0]); } else { for (var i = 0, ilen = items.length; i < ilen; i++) { if (items[i].id === "current-item") { if (i + 1 < ilen) { items[i].id = "item-" + items[i].getAttribute("data-item-id"); items[i + 1].id = "current-item"; scrollPageTo(items[i + 1]); } break; } } } } function findPreviousItem() { var items = document.getElementsByTagName("article"); if (! document.getElementById("current-item")) { items[items.length - 1].id = "current-item"; scrollPageTo(items[items.length - 1]); } else { for (var i = items.length - 1; i >= 0; i--) { if (items[i].id === "current-item") { if (i - 1 >= 0) { items[i].id = "item-" + items[i].getAttribute("data-item-id"); items[i - 1].id = "current-item"; scrollPageTo(items[i - 1]); } break; } } } } function isListing() { if (document.getElementById("listing")) return true; return false; } return { OpenNextPage: function() { var link = document.getElementById("next-page"); if (link) link.click(); }, OpenPreviousPage: function() { var link = document.getElementById("previous-page"); if (link) link.click(); }, SelectNextItem: function() { var link = document.getElementById("next-item"); if (link) { link.click(); } else if (isListing()) { findNextItem(); } }, SelectPreviousItem: function() { var link = document.getElementById("previous-item"); if (link) { link.click(); } else if (isListing()) { findPreviousItem(); } }, ShowHelp: function() { var help_layer = document.getElementById("help-layer"); help_layer.removeAttribute("class"); }, CloseHelp: function() { var help_layer = document.getElementById("help-layer"); help_layer.setAttribute("class", "hide"); }, IsListing: isListing }; })();