Move assets
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7 changed files with 10 additions and 6 deletions
public
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//==========================================================
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// head-support.js
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//
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// An extension to htmx 1.0 to add head tag merging.
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//==========================================================
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(function(){
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var api = null;
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function log() {
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//console.log(arguments);
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}
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function mergeHead(newContent, defaultMergeStrategy) {
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if (newContent && newContent.indexOf('<head') > -1) {
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const htmlDoc = document.createElement("html");
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// remove svgs to avoid conflicts
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var contentWithSvgsRemoved = newContent.replace(/<svg(\s[^>]*>|>)([\s\S]*?)<\/svg>/gim, '');
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// extract head tag
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var headTag = contentWithSvgsRemoved.match(/(<head(\s[^>]*>|>)([\s\S]*?)<\/head>)/im);
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// if the head tag exists...
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if (headTag) {
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var added = []
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var removed = []
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var preserved = []
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var nodesToAppend = []
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htmlDoc.innerHTML = headTag;
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var newHeadTag = htmlDoc.querySelector("head");
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var currentHead = document.head;
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if (newHeadTag == null) {
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return;
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} else {
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// put all new head elements into a Map, by their outerHTML
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var srcToNewHeadNodes = new Map();
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for (const newHeadChild of newHeadTag.children) {
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srcToNewHeadNodes.set(newHeadChild.outerHTML, newHeadChild);
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}
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}
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// determine merge strategy
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var mergeStrategy = api.getAttributeValue(newHeadTag, "hx-head") || defaultMergeStrategy;
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// get the current head
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for (const currentHeadElt of currentHead.children) {
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// If the current head element is in the map
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var inNewContent = srcToNewHeadNodes.has(currentHeadElt.outerHTML);
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var isReAppended = currentHeadElt.getAttribute("hx-head") === "re-eval";
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var isPreserved = api.getAttributeValue(currentHeadElt, "hx-preserve") === "true";
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if (inNewContent || isPreserved) {
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if (isReAppended) {
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// remove the current version and let the new version replace it and re-execute
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removed.push(currentHeadElt);
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} else {
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// this element already exists and should not be re-appended, so remove it from
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// the new content map, preserving it in the DOM
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srcToNewHeadNodes.delete(currentHeadElt.outerHTML);
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preserved.push(currentHeadElt);
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}
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} else {
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if (mergeStrategy === "append") {
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// we are appending and this existing element is not new content
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// so if and only if it is marked for re-append do we do anything
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if (isReAppended) {
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removed.push(currentHeadElt);
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nodesToAppend.push(currentHeadElt);
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}
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} else {
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// if this is a merge, we remove this content since it is not in the new head
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if (api.triggerEvent(document.body, "htmx:removingHeadElement", {headElement: currentHeadElt}) !== false) {
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removed.push(currentHeadElt);
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}
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}
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}
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}
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// Push the tremaining new head elements in the Map into the
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// nodes to append to the head tag
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nodesToAppend.push(...srcToNewHeadNodes.values());
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log("to append: ", nodesToAppend);
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for (const newNode of nodesToAppend) {
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log("adding: ", newNode);
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var newElt = document.createRange().createContextualFragment(newNode.outerHTML);
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log(newElt);
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if (api.triggerEvent(document.body, "htmx:addingHeadElement", {headElement: newElt}) !== false) {
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currentHead.appendChild(newElt);
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added.push(newElt);
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}
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}
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// remove all removed elements, after we have appended the new elements to avoid
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// additional network requests for things like style sheets
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for (const removedElement of removed) {
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if (api.triggerEvent(document.body, "htmx:removingHeadElement", {headElement: removedElement}) !== false) {
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currentHead.removeChild(removedElement);
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}
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}
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api.triggerEvent(document.body, "htmx:afterHeadMerge", {added: added, kept: preserved, removed: removed});
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}
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}
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}
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htmx.defineExtension("head-support", {
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init: function(apiRef) {
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// store a reference to the internal API.
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api = apiRef;
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htmx.on('htmx:afterSwap', function(evt){
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var serverResponse = evt.detail.xhr.response;
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if (api.triggerEvent(document.body, "htmx:beforeHeadMerge", evt.detail)) {
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mergeHead(serverResponse, evt.detail.boosted ? "merge" : "append");
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}
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})
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htmx.on('htmx:historyRestore', function(evt){
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if (api.triggerEvent(document.body, "htmx:beforeHeadMerge", evt.detail)) {
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if (evt.detail.cacheMiss) {
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mergeHead(evt.detail.serverResponse, "merge");
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} else {
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mergeHead(evt.detail.item.head, "merge");
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}
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}
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})
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htmx.on('htmx:historyItemCreated', function(evt){
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var historyItem = evt.detail.item;
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historyItem.head = document.head.outerHTML;
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})
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}
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});
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})()
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@charset "utf-8";
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body {
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font-family: "Noto Sans JP", sans-serif;
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font-optical-sizing: auto;
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font-weight: 400;
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font-style: normal;
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}
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html{-webkit-text-size-adjust:100%;box-sizing:border-box;-moz-tab-size:4;tab-size:4;word-break:normal}*,:after,:before{background-repeat:no-repeat;box-sizing:inherit}:after,:before{text-decoration:inherit;vertical-align:inherit}*{margin:0;padding:0}hr{color:inherit;height:0;overflow:visible}details,main{display:block}summary{display:list-item}small{font-size:80%}[hidden]{display:none}abbr[title]{border-bottom:none;text-decoration:underline;text-decoration:underline dotted}a{background-color:transparent}a:active,a:hover{outline-width:0}code,kbd,pre,samp{font-family:monospace,monospace}pre{font-size:1em}b,strong{font-weight:bolder}sub,sup{font-size:75%;line-height:0;position:relative;vertical-align:baseline}sub{bottom:-.25em}sup{top:-.5em}table{border-color:inherit;text-indent:0}iframe{border-style:none}input{border-radius:0}[type=number]::-webkit-inner-spin-button,[type=number]::-webkit-outer-spin-button{height:auto}[type=search]{-webkit-appearance:textfield;outline-offset:-2px}[type=search]::-webkit-search-decoration{-webkit-appearance:none}textarea{overflow:auto;resize:vertical}button,input,optgroup,select,textarea{font:inherit}optgroup{font-weight:700}button{overflow:visible}button,select{text-transform:none}[role=button],[type=button],[type=reset],[type=submit],button{cursor:pointer}[type=button]::-moz-focus-inner,[type=reset]::-moz-focus-inner,[type=submit]::-moz-focus-inner,button::-moz-focus-inner{border-style:none;padding:0}[type=button]::-moz-focus-inner,[type=reset]::-moz-focus-inner,[type=submit]::-moz-focus-inner,button:-moz-focusring{outline:1px dotted ButtonText}[type=reset],[type=submit],button,html [type=button]{-webkit-appearance:button}button,input,select,textarea{background-color:transparent;border-style:none}a:focus,button:focus,input:focus,select:focus,textarea:focus{outline-width:0}select{-moz-appearance:none;-webkit-appearance:none}select::-ms-expand{display:none}select::-ms-value{color:currentColor}legend{border:0;color:inherit;display:table;max-width:100%;white-space:normal}::-webkit-file-upload-button{-webkit-appearance:button;color:inherit;font:inherit}[disabled]{cursor:default}img{border-style:none}progress{vertical-align:baseline}[aria-busy=true]{cursor:progress}[aria-controls]{cursor:pointer}[aria-disabled=true]{cursor:default}
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