flxzt/rnote · warning

failed to parse `style` attribute in XoppBackground with…

Error message

failed to parse `style` attribute in XoppBackground with node id {:?}, could not find attribute

What it means

When the <background> type is "solid", XoppBackground::load_from_xml requires a 'style' attribute to build a XoppBackgroundSolidStyle. Missing style triggers this error, which is then logged and the style silently falls back to Plain.

Solutions

1. Add style="plain" (or ruled/lined/staves/graph/dotted/isodotted/isograph) to the solid background element
2. Re-save the file in Xournal++ to restore the attribute
3. If the fallback to Plain is acceptable, ignore the log but expect visual differences
4. Validate background attributes when generating xopp XML

Example fix

// before
<background type="solid" color="#ffffffff"/>
// after
<background type="solid" style="plain" color="#ffffffff"/>

fn solid_bg_has_style(node: &roxmltree::Node) -> bool {
    node.attribute("style").is_some()
}

// engine already falls back to Plain; mirror that defensively
match XoppBackgroundSolidStyle::from_xml_attr_value(
    node.attribute("style").unwrap_or("plain")) {
    Ok(s) => s,
    Err(_) => XoppBackgroundSolidStyle::Plain,
}

When it happens

Trigger: load_from_xml on a <background type="solid"> node lacking a 'style' attribute. The error is recorded via tracing error! and processing continues with XoppBackgroundSolidStyle::Plain.

Common situations: Hand-edited .xopp files; third-party generators emitting solid backgrounds without style; partial copy of a background element.

Understand the failure class

Background: "missing required argument" and "the following required arguments were not provided": what required-argument errors mean and how to fix them — this error's family across 20 libraries.

• Parsing and encoding errors: unexpected token, malformed input — why parsers reject input and how to find the real culprit.

Related errors

• failed to parse width attribute of XoppPage for node with id
• failed to parse height attribute of XoppPage with node id
• failed to parse `type` attribute of XoppBackground with…
• Failed to parse `domain` attribute in XoppBackground with…
• Failed to parse `filename` attribute in XoppBackground with…

AI-assisted analysis of flxzt/rnote@bbc5354502 (2026-09-08). Data as JSON: /api/errors/6549e8a3447998e5. Report an issue: GitHub.

Appendix: source

Thrown at crates/rnote-engine/src/fileformats/xoppformat.rs:371

    /// Optional background name.
    pub name: Option<String>,
    /// The background type.
    pub bg_type: XoppBackgroundType,
}

impl XmlLoadable for XoppBackground {
    fn load_from_xml(&mut self, node: Node) -> anyhow::Result<()> {
        self.name = node.attribute("name").map(|name| name.to_string());

        match node.attribute("type").ok_or_else(|| {
            anyhow::anyhow!(
                "failed to parse `type` attribute of XoppBackground with node id {:?}, could not find attribute",
                node.id()
            )
        })? {
            "solid" => {
                let style = match XoppBackgroundSolidStyle::from_xml_attr_value(node.attribute("style").ok_or_else(|| {
                    anyhow::anyhow!("failed to parse `style` attribute in XoppBackground with node id {:?}, could not find attribute", node.id())
                })?) {
                    Ok(s) => s,
                    Err(e) => {
                        error!("Failed to retrieve the XoppBackgroundSolidStyle from `style` attribute, Err: {e:?}");
                        XoppBackgroundSolidStyle::Plain
                    }
                };

                let color = XoppColor::from_backgroundcolor_attr_value(
                    node.attribute("color").ok_or_else(|| {
                        anyhow::anyhow!(
                            "Failed to parse `color` attribute in XoppBackground with id {:?}",
                            node.id()
                        )
                    })?,
                )?;
                self.bg_type = XoppBackgroundType::Solid { color, style };
            }

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