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Code Issues Releases Wiki Activity

Handle switching the bound tiddler (#7868)

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yaisog 2023-11-30 19:26:26 +01:00 committed by GitHub
parent f7359671aa
commit e60ddf0b0a
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 32 additions and 21 deletions
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53
core/modules/widgets/scrollable.js
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@ -177,28 +177,28 @@ ScrollableWidget.prototype.render = function(parent,nextSibling) {
if(this.scrollableBind) {
// After a delay for rendering, scroll to the bound position
setTimeout(this.updateScrollPositionFromBoundTiddler.bind(this),50);
// Save scroll position on DOM scroll event
var timeout;
this.outerDomNode.addEventListener("scroll",function(event) {
if(timeout) {
clearTimeout(timeout);
timeout = null;
}
timeout = setTimeout(function() {
var existingTiddler = self.wiki.getTiddler(self.scrollableBind),
newTiddlerFields = {
title: self.scrollableBind,
"scroll-left": self.outerDomNode.scrollLeft.toString(),
"scroll-top": self.outerDomNode.scrollTop.toString()
};
if(!existingTiddler || (existingTiddler.fields["title"] !== newTiddlerFields["title"]) || (existingTiddler.fields["scroll-left"] !== newTiddlerFields["scroll-left"] || existingTiddler.fields["scroll-top"] !== newTiddlerFields["scroll-top"])) {
self.wiki.addTiddler(new $tw.Tiddler(existingTiddler,newTiddlerFields));
}
},DEBOUNCE_INTERVAL);
});
// Set up event listener
this.currentListener = this.listenerFunction.bind(this);
this.outerDomNode.addEventListener("scroll", this.currentListener);
}
};
ScrollableWidget.prototype.listenerFunction = function(event) {
self = this;
clearTimeout(this.timeout);
this.timeout = setTimeout(function() {
var existingTiddler = self.wiki.getTiddler(self.scrollableBind),
newTiddlerFields = {
title: self.scrollableBind,
"scroll-left": self.outerDomNode.scrollLeft.toString(),
"scroll-top": self.outerDomNode.scrollTop.toString()
};
if(!existingTiddler || (existingTiddler.fields["title"] !== newTiddlerFields["title"]) || (existingTiddler.fields["scroll-left"] !== newTiddlerFields["scroll-left"] || existingTiddler.fields["scroll-top"] !== newTiddlerFields["scroll-top"])) {
self.wiki.addTiddler(new $tw.Tiddler(existingTiddler,newTiddlerFields));
}
}, DEBOUNCE_INTERVAL);
}
ScrollableWidget.prototype.updateScrollPositionFromBoundTiddler = function() {
// Bail if we're running on the fakedom
if(!this.outerDomNode.scrollTo) {
@ -243,8 +243,19 @@ ScrollableWidget.prototype.refresh = function(changedTiddlers) {
this.refreshSelf();
return true;
}
if(changedAttributes.bind || changedTiddlers[this.getAttribute("bind")]) {
this.updateScrollPositionFromBoundTiddler();
// If the bound tiddler has changed, update the eventListener and update scroll position
if(changedAttributes["bind"]) {
if(this.currentListener) {
this.outerDomNode.removeEventListener("scroll", this.currentListener, false);
}
this.scrollableBind = this.getAttribute("bind");
this.currentListener = this.listenerFunction.bind(this);
this.outerDomNode.addEventListener("scroll", this.currentListener);
setTimeout(this.updateScrollPositionFromBoundTiddler.bind(this),50);
}
// If a new scroll position was written into the tiddler, update scroll position
if(changedTiddlers[this.getAttribute("bind")]) {
setTimeout(this.updateScrollPositionFromBoundTiddler.bind(this),50);
}
return this.refreshChildren(changedTiddlers);
};