57 lines
2.2 KiB
JavaScript
57 lines
2.2 KiB
JavaScript
// Returns a function, that, as long as it continues to be invoked, will not
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// be triggered. The function will be called after it stops being called for
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// N milliseconds. If `immediate` is passed, trigger the function on the
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// leading edge, instead of the trailing.
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function debounce(func, wait, immediate) {
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var timeout;
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return function () {
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var context = this, args = arguments;
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var later = function () {
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timeout = null;
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if (!immediate) func.apply(context, args);
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};
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var callNow = immediate && !timeout;
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clearTimeout(timeout);
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timeout = setTimeout(later, wait);
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if (callNow) func.apply(context, args);
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};
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}
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let preview = null;
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window.onload = function () {
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const previewButton = document.querySelector("input#_live_preview");
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previewButton.addEventListener("click", event => {
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event.preventDefault();
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const params = "width=800,height=1000,menubar=no,toolbar=no,location=no,status=no,resizable=yes,scrollbars=yes";
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if (preview !== null) {
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preview.close();
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}
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preview = window.open("about:blank", "Preview", params);
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const id = Number(window.location.pathname.match(/\d+/)[0]);
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const loadPreview = debounce(function () {
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const body = new FormData();
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const articleContent = document.getElementById("id_content").value;
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body.set("content", articleContent);
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const csrfToken = document.querySelector("input[name=csrfmiddlewaretoken]").value;
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body.set("csrfmiddlewaretoken", csrfToken);
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fetch(`/api/render/${id}/`, {method: "POST", body: body})
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.then(function (response) {
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response.text().then(value => {
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preview.document.querySelector("html").innerHTML = value
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});
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})
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}, 500);
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preview.onload = loadPreview;
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const content = document.getElementById("id_content");
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content.addEventListener("input", event => {
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event.preventDefault();
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loadPreview();
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});
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})
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};
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window.onbeforeunload = function () {
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if (preview !== null) {
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preview.close();
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}
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};
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