usvg 0.4.0

An SVG simplification library.
Documentation 
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// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.

use super::prelude::*;


/// Removes invalid FuncIRI links.
///
/// `svgdom` will store unresolved links as strings.
/// So we have to remove attributes that should be FuncIRI and not string.
pub fn rm_invalid_links(doc: &mut Document) {
    for mut node in doc.root().descendants() {
        if !is_valid_func_link(&node, AId::ClipPath) {
            node.remove_attribute(AId::ClipPath);
        }

        if !is_valid_func_link(&node, AId::Mask) {
            node.remove_attribute(AId::Mask);
        }
    }

    // Unlike `clip-path` and `mask`, when `filter` is invalid
    // than the whole element should be removed.
    let root = doc.root().clone();
    doc.drain(root, |n| !is_valid_func_link(n, AId::Filter));
}

fn is_valid_func_link(node: &Node, aid: AId) -> bool {
    match node.attributes().get_value(aid) {
        Some(AValue::FuncLink(_)) | None => true,
        _ => false,
    }
}