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// author: joakimoa
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// keyboard navigation
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// v1.4
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$(document).on("ready", function() { |
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// adding keyboard navigation to options menu
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if (window.Options && Options.get_tab('general')) { |
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Options.extend_tab("general", |
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"<fieldset><legend> Keyboard Navigation </legend>" + |
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("<label class='keyboardnav' id='keyboardnav' style='padding:0px;'><input type='checkbox' /> Enable Keyboard Navigation</label>") + |
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"<table><tr><td>Action</td><td>Key (a-z)</td></tr>" + |
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"<tr><td>Next Reply</td><td><input class='field' name='next-reply-input' spellcheck='false'></td></tr>" + |
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"<tr><td>Previous Reply</td><td><input class='field' name='previous-reply-input' spellcheck='false'></td></tr>" + |
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"<tr><td>Expand File</td><td><input class='field' name='expando-input' spellcheck='false'></td></tr>" + |
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"<tr><td>Refresh Thread</td><td><input class='field' name='refresh-thread-input' spellcheck='false'></td></tr>" + |
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"</table></fieldset>"); |
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} |
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$('.keyboardnav').on('change', function(){ |
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var setting = $(this).attr('id'); |
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localStorage[setting] = $(this).children('input').is(':checked'); |
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}); |
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var nextReplyKeycode = 74; // j
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var previousReplyKeycode = 75; // k
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var expandoKeycode = 69; // e
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var refreshThreadKeycode = 82; // r
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if (!localStorage.keyboardnav) { |
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localStorage.keyboardnav = 'false'; |
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} |
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if (!localStorage["next.reply.key"]) { |
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localStorage["next.reply.key"] = nextReplyKeycode; |
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} |
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if (!localStorage["previous.reply.key"]) { |
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localStorage["previous.reply.key"] = previousReplyKeycode; |
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} |
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if (!localStorage["expando.key"]) { |
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localStorage["expando.key"] = expandoKeycode; |
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} |
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if (!localStorage["refresh.thread.key"]) { |
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localStorage["refresh.thread.key"] = refreshThreadKeycode; |
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} |
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// getting locally stored setting
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function getSetting(key) { |
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return (localStorage[key] == 'true'); |
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} |
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function isKeySet(key) { |
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return (localStorage[key] !== false); |
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} |
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var nextReplyInput = document.getElementsByName("next-reply-input")[0]; |
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var previousReplyInput = document.getElementsByName("previous-reply-input")[0]; |
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var expandoInput = document.getElementsByName("expando-input")[0]; |
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var refreshThreadInput = document.getElementsByName("refresh-thread-input")[0]; |
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if (getSetting('keyboardnav')) $('#keyboardnav>input').prop('checked', 'checked'); |
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if (isKeySet('next.reply.key')) { |
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nextReplyKeycode = localStorage["next.reply.key"]; |
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nextReplyInput.value = nextReplyKeycode; |
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} |
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if (isKeySet('previous.reply.key')) { |
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previousReplyKeycode = localStorage["previous.reply.key"]; |
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previousReplyInput.value = previousReplyKeycode; |
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} |
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if (isKeySet('expando.key')) { |
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expandoKeycode = localStorage["expando.key"]; |
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expandoInput.value = expandoKeycode; |
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} |
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if (isKeySet('refresh.thread.key')) { |
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refreshThreadKeycode = localStorage["refresh.thread.key"]; |
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refreshThreadInput.value = refreshThreadKeycode; |
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} |
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nextReplyInput.value = String.fromCharCode(nextReplyKeycode); |
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previousReplyInput.value = String.fromCharCode(previousReplyKeycode); |
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expandoInput.value = String.fromCharCode(expandoKeycode); |
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refreshThreadInput.value = String.fromCharCode(refreshThreadKeycode); |
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nextReplyInput.addEventListener("keyup", changeNextReplyKey, false); |
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previousReplyInput.addEventListener("keyup", changePreviousReplyKey, false); |
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expandoInput.addEventListener("keyup", changeExpandoKey, false); |
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refreshThreadInput.addEventListener("keyup", changeRefreshThreadKey, false); |
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function changeNextReplyKey(e) { |
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nextReplyInput.value = ""; |
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if (e.keyCode >= 65 && e.keyCode <= 90) { |
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nextReplyInput.value = String.fromCharCode(e.keyCode); |
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localStorage["next.reply.key"] = e.keyCode; |
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} |
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} |
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function changePreviousReplyKey(e) { |
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previousReplyInput.value = ""; |
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if (e.keyCode >= 65 && e.keyCode <= 90) { |
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previousReplyInput.value = String.fromCharCode(e.keyCode); |
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localStorage["previous.reply.key"] = e.keyCode; |
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} |
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} |
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function changeExpandoKey(e) { |
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expandoInput.value = ""; |
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if (e.keyCode >= 65 && e.keyCode <= 90) { |
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expandoInput.value = String.fromCharCode(e.keyCode); |
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localStorage["expando.key"] = e.keyCode; |
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} |
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} |
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function changeRefreshThreadKey(e) { |
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refreshThreadInput.value = ""; |
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if (e.keyCode >= 65 && e.keyCode <= 90) { |
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refreshThreadInput.value = String.fromCharCode(e.keyCode); |
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localStorage["refresh.thread.key"] = e.keyCode; |
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} |
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} |
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// loads the main function
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function loadKeyboardNav() { |
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var replies = document.getElementsByClassName("post reply"); |
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var current_file = null; |
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var default_color = "#333"; |
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var highlight_color = "#555"; |
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// grabs base and highlight colors
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if (replies.length > 0) { |
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if (replies[0].classList.contains("highlighted")) { |
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replies[0].classList.remove('highlighted'); |
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default_color = window.getComputedStyle(replies[0], null).getPropertyValue("background-color"); |
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replies[0].classList.add('highlighted'); |
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highlight_color = window.getComputedStyle(replies[0], null).getPropertyValue("background-color"); |
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} else { |
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default_color = window.getComputedStyle(replies[0], null).getPropertyValue("background-color"); |
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replies[0].classList.add('highlighted'); |
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highlight_color = window.getComputedStyle(replies[0], null).getPropertyValue("background-color"); |
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replies[0].classList.remove('highlighted'); |
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} |
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} |
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// check if user is in textareas where hotkeys needs to be disabled
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var text_input_focused = false; |
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function checkFocused () { |
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var el = document.activeElement; |
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if (el && (el.tagName.toLowerCase() == 'input' && el.type == 'text' || |
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el.tagName.toLowerCase() == 'textarea')) { |
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text_input_focused = true; |
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} else { |
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text_input_focused = false; |
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} |
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} |
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document.addEventListener('focus',function(e){ |
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checkFocused(); |
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}, true); |
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document.addEventListener('blur',function(e){ |
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text_input_focused = false; |
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}, true); |
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// strips out <a href="" class="file"> tags
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function getFileList(e) { |
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var arr = []; |
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var e = e.getElementsByClassName("file"); |
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if (e.length > 0) { |
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for (i = 0; i < e.length; i++) { |
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if (e[i].tagName === "DIV") { |
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arr.push(e[i]); |
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} |
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} |
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} |
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return arr; |
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} |
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var reply_indexx = -1; // might change back to 0
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var image_indexx = -1; |
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function focusNextReply() { |
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if (reply_indexx < replies.length-1) { |
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reply_indexx++; |
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image_indexx = -1; |
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var images = getFileList(replies[reply_indexx]); |
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if (images.length !== 0) { |
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focusNextImage(); |
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} else { |
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scrollTo(replies[reply_indexx], true); |
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} |
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} |
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} |
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function focusNextImage() { |
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var images = getFileList(replies[reply_indexx]); |
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if (images.length === 0) { |
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focusNextReply(); |
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} else { |
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image_indexx++; |
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if (image_indexx > images.length-1) { |
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image_indexx = 0; |
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focusNextReply(); |
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} else { |
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var im = images[image_indexx].getElementsByClassName("full-image"); |
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if (im.length === 0) { |
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im = images[image_indexx].getElementsByClassName("post-image"); |
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} |
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scrollTo(im[0], true); |
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} |
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} |
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} |
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function focusPreviousReply() { |
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if (reply_indexx > 0) { |
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reply_indexx--; |
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var images = getFileList(replies[reply_indexx]); |
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image_indexx = images.length; |
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if (images.length !== 0) { |
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focusPreviousImage(); |
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} else { |
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image_indexx = -1; |
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scrollTo(replies[reply_indexx], false); |
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} |
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} |
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} |
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function focusPreviousImage() { |
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var images = getFileList(replies[reply_indexx]); |
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if (images.length === 0) { |
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focusPreviousReply(); |
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} else { |
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image_indexx--; |
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if (image_indexx < 0) { |
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image_indexx = 0; |
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focusPreviousReply(); |
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} else { |
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var im = images[image_indexx].getElementsByClassName("full-image"); |
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if (im.length === 0) { |
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im = images[image_indexx].getElementsByClassName("post-image") |
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} |
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scrollTo(im[0], false); |
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} |
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} |
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} |
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// from https://gist.github.com/jjmu15/8646226
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function isInViewport(element) { |
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var rect = element.getBoundingClientRect(); |
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var html = document.documentElement; |
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return ( |
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rect.top >= 0 && |
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rect.left >= 0 && |
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rect.bottom <= (window.innerHeight || html.clientHeight) && |
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rect.right <= (window.innerWidth || html.clientWidth) |
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); |
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} |
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function scrollTo(e, direction_down) { |
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if (current_file !== null && !current_file.classList.contains("highlighted")) { |
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current_file.style.backgroundColor = default_color; |
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} |
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current_file = e; |
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if (!isInViewport(e)) { |
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if (direction_down) { |
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e.scrollIntoView(false); |
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window.scrollBy(0, 30); |
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} else { |
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e.scrollIntoView(); |
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window.scrollBy(0, -30); |
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} |
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} |
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e.style.backgroundColor = highlight_color; |
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} |
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function expandFile() { |
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var imgg = replies[reply_indexx].getElementsByClassName("post-image"); |
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if (imgg.length > 0 && image_indexx > -1) { |
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imgg[image_indexx].click(); |
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} |
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} |
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// input
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window.addEventListener("keydown", checkKeyPressed, false); |
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function checkKeyPressed(e) { |
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if (!text_input_focused) { |
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replies = document.getElementsByClassName("post reply"); // if new ones via AJAX
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if (e.keyCode == nextReplyKeycode) { |
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if (reply_indexx === -1) { // needed for initial condition
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focusNextReply(); |
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} else { |
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focusNextImage(); |
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} |
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} else if (e.keyCode == previousReplyKeycode) { |
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focusPreviousImage(); |
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} else if (e.keyCode == expandoKeycode) { |
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expandFile(); |
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} else if (e.keyCode == refreshThreadKeycode) { |
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document.getElementById("update_thread").click(); |
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} |
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} |
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} |
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} |
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// loads main function if checkbox toggled and in a thread with replies
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if (getSetting('keyboardnav') && document.getElementsByClassName("thread").length === 1 && document.getElementsByClassName("post reply").length > 0) { |
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loadKeyboardNav(); |
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} |
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}); |
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