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Code Issues Releases Wiki Activity

Extend image widget to support alternate content if a remote image fails to load

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...and use it to add an image for bags/recipes that do not have a $:/favicon.ico
This commit is contained in:
Jeremy Ruston
2024-01-23 22:05:22 +00:00
parent 627c3e20cc
commit d16746ab38
4 changed files with 34 additions and 6 deletions
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18
core/modules/widgets/image.js
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@@ -43,6 +43,7 @@ ImageWidget.prototype = new Widget();
Render this widget into the DOM
*/
ImageWidget.prototype.render = function(parent,nextSibling) {
var self = this;
this.parentDomNode = parent;
this.computeAttributes();
this.execute();
@@ -118,6 +119,14 @@ ImageWidget.prototype.render = function(parent,nextSibling) {
if(this.lazyLoading && tag === "img") {
domNode.setAttribute("loading",this.lazyLoading);
}
// Insert element
parent.insertBefore(domNode,nextSibling);
this.domNodes.push(domNode);
// Render children into a wrapper
this.childWrapper = this.document.createElement("span");
this.childWrapper.style.display = "none" ;
parent.insertBefore(this.childWrapper,nextSibling);
this.renderChildren(this.childWrapper,null);
// Add classes when the image loads or fails
$tw.utils.addClass(domNode,"tc-image-loading");
domNode.addEventListener("load",function() {
@@ -127,10 +136,9 @@ ImageWidget.prototype.render = function(parent,nextSibling) {
domNode.addEventListener("error",function() {
$tw.utils.removeClass(domNode,"tc-image-loading");
$tw.utils.addClass(domNode,"tc-image-error");
self.childWrapper.style.display = "inline" ;
domNode.style.display = "none";
},false);
// Insert element
parent.insertBefore(domNode,nextSibling);
this.domNodes.push(domNode);
};
/*
@@ -142,10 +150,12 @@ ImageWidget.prototype.execute = function() {
this.imageWidth = this.getAttribute("width");
this.imageHeight = this.getAttribute("height");
this.imageClass = this.getAttribute("class");
this.imageUsemap = this.getAttribute("usemap");
this.imageUsemap = this.getAttribute("usemap");
this.imageTooltip = this.getAttribute("tooltip");
this.imageAlt = this.getAttribute("alt");
this.lazyLoading = this.getAttribute("loading");
// Make the child widgets
this.makeChildWidgets();
};
/*