// SPDX-License-Identifier: MIT
.pragma library

// Task Manager fills unused panel space. Only delegates are task buttons.
function hasTaskAt(item, x, y) {
    if (!item.visible) return false;
    const point = item.mapFromItem(null, x, y);
    if (!item.contains(point)) return false;
    if (item.tasksRoot !== undefined && item.isWindow !== undefined && item.index !== undefined) return true;
    for (const child of item.children) {
        if (hasTaskAt(child, x, y)) return true;
    }
    return false;
}

function appletArea(child, x, y) {
    const applet = child.applet;
    const name = applet?.plasmoid?.pluginName;
    if (!name) return "other";
    if (name === "org.kde.plasma.taskmanager" || name === "org.kde.plasma.icontasks") {
        return hasTaskAt(applet, x, y) ? "tasks" : "empty";
    }
    if (name === "se.ajpanton.panelactions" || name === "org.kde.plasma.panelspacer"
        || name === "org.kde.plasma.marginsseparator") return "empty";
    if (name === "org.kde.plasma.systemtray") return "tray";
    if (name === "org.kde.plasma.digitalclock" || name === "org.kde.plasma.analogclock") return "clock";
    if (name === "org.kde.plasma.kickoff" || name === "org.kde.plasma.kicker"
        || name === "org.kde.plasma.kickerdash") return "launcher";
    return "other";
}

function panelViewFor(item) {
    for (let parent = item.parent; parent; parent = parent.parent) {
        if (parent.containment && parent.leftPadding !== undefined
            && parent.rightPadding !== undefined && parent.topPadding !== undefined
            && parent.bottomPadding !== undefined) return parent;
    }
    return null;
}

function areaAt(panelLayout, x, y, panelView) {
    if (!panelLayout || !panelView?.containment) return "";
    // Match Plasma PanelView's containmentContainsPosition / positionAdjustedForContainment.
    // Read the same live theme padding and containment origin, including floating offsets.
    const containment = panelView.containment;
    const origin = containment.mapToItem(null, 0, 0);
    const left = origin.x + panelView.leftPadding;
    const top = origin.y + panelView.topPadding;
    const right = origin.x + containment.width - panelView.rightPadding;
    const bottom = origin.y + containment.height - panelView.bottomPadding;
    if (right <= left || bottom <= top) return "";
    if (x < left || x >= right || y < top || y >= bottom) {
        // The trailing boundary itself is outside Qt Quick's input area.
        x = Math.max(left, Math.min(x, right - 1));
        y = Math.max(top, Math.min(y, bottom - 1));
    }
    for (const child of panelLayout.children) {
        if (child.visible && child.contains(child.mapFromItem(null, x, y))) {
            return appletArea(child, x, y);
        }
    }
    return "empty";
}