Layout Loop in NotificationItem.qml

[renato-chagas]

I finally tracked down the random freezes happening on the right sidebar.

At first I thought it was something related to Hyprland binds or Quickshell IPC, but after running Quickshell directly from the terminal and checking the logs, the actual issue turned out to be a QML layout loop inside NotificationItem.qml.

The logs constantly spammed:

possible QQuickItem::polish() loop
ColumnLayout called polish() inside updatePolish() of ColumnLayout

After digging into it, I found two main causes.

The first one was this binding:

Layout.fillWidth: summaryTextMetrics.width >= summaryRow.implicitWidth * root.summaryElideRatio

summaryText was deciding whether to fill width based on the parent's implicit width, while the parent width itself depended on the child geometry. So it created a circular layout dependency.

The second issue was this:

text: {
    return `<style>img{max-width:${expandedContentColumn.width}px;}</style>` + ...
}

Because the HTML string depended on expandedContentColumn.width, the text was being rebuilt every time the layout changed slightly, which triggered another layout recalculation again and again.

After replacing the conditional width logic with:

Layout.fillWidth: true

and removing the dynamic HTML width injection (using Layout.preferredWidth instead), the freezes completely disappeared.

The sidebar now opens instantly and the topbar no longer becomes unresponsive after notifications arrive.

Maybe this helps someone else debugging similar random UI freezes in Quickshell/QML layouts.