SVGhandling.md

XMLStarlet test

Generic script

#!/bin/bash

# Input SVG file
input_svg="$1"
if [ ! -f "$input_svg" ]; then
    echo "Error: Input file '$input_svg' not found." >&2
    exit 1
fi

# Get total number of symbols
num_symbols=$(xmlstarlet sel -t -m "//symbol" -v "count()" "$input_svg")
if [ "$num_symbols" -eq 0 ]; then
    echo "No symbols found in '$input_svg'." >&2
    exit 0
fi

# Process each symbol
for i in $(seq 1 "$num_symbols"); do
    # Extract symbol attributes and content
    symbol_id=$(xmlstarlet sel -t -m "//symbol[$i]" -v "@id" "$input_svg")
    viewBox=$(xmlstarlet sel -t -m "//symbol[$i]" -v "@viewBox" "$input_svg")
    width_attr=$(xmlstarlet sel -t -m "//symbol[$i]" -v "@width" "$input_svg")
    height_attr=$(xmlstarlet sel -t -m "//symbol[$i]" -v "@height" "$input_svg")
    preserveAspectRatio=$(xmlstarlet sel -t -m "//symbol[$i]" -v "@preserveAspectRatio" "$input_svg")
    symbol_element=$(xmlstarlet sel -t -m "//symbol[$i]" -c . -n "$input_svg")

    # Determine root SVG attributes
    svg_viewBox="$viewBox"
    svg_width="$width_attr"
    svg_height="$height_attr"

    # Handle missing viewBox
    if [ -z "$svg_viewBox" ]; then
        if [ -n "$svg_width" ] && [ -n "$svg_height" ]; then
            svg_viewBox="0 0 $svg_width $svg_height"
        else
            svg_viewBox="0 0 100 100"
            [ -z "$svg_width" ] && svg_width="100"
            [ -z "$svg_height" ] && svg_height="100"
        fi
    elif [ -z "$svg_width" ] || [ -z "$svg_height" ]; then
        # Extract viewBox dimensions if missing width/height
        viewBox_width=$(echo "$svg_viewBox" | awk '{print $3}')
        viewBox_height=$(echo "$svg_viewBox" | awk '{print $4}')
        [ -z "$svg_width" ] && svg_width="$viewBox_width"
        [ -z "$svg_height" ] && svg_height="$viewBox_height"
    fi

    # Create output file
    output_file="${symbol_id}.svg"
    cat > "$output_file" << EOF
<?xml version="1.0" encoding="UTF-8"?>
<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"
EOF

    # Add SVG attributes if present
    [ -n "$svg_viewBox" ] && echo "  viewBox=\"$svg_viewBox\"" >> "$output_file"
    [ -n "$svg_width" ] && echo "  width=\"$svg_width\"" >> "$output_file"
    [ -n "$svg_height" ] && echo "  height=\"$svg_height\"" >> "$output_file"
    [ -n "$preserveAspectRatio" ] && echo "  preserveAspectRatio=\"$preserveAspectRatio\"" >> "$output_file"

    # Complete SVG structure
    cat >> "$output_file" << EOF
>
$symbol_element
<use xlink:href="#${symbol_id}" x="0" y="0" width="100%" height="100%" />
</svg>
EOF

    echo "Created '$output_file'"
done

echo "Processed $num_symbols symbols."

Maybe dasel?

#!/bin/bash

# Check if input file is provided
if [ $# -ne 1 ]; then
    echo "Usage: $0 <svg_file>"
    exit 1
fi

input_file="$1"
i=0

while true; do
    # Get symbol XML for current index
    symbol_xml=$(dasel select -r -f xml "svg.symbol[$i]" "$input_file")
    
    # Break if no more symbols
    if [ -z "$symbol_xml" ]; then
        break
    fi

    # Extract symbol ID
    symbol_id=$(echo "$symbol_xml" | dasel select -r -f yaml 'id')
    
    # Skip if no ID found
    if [ -z "$symbol_id" ]; then
        echo "Warning: Symbol at index $i has no ID, skipping"
        i=$((i + 1))
        continue
    fi

    # Extract viewBox (with default fallback)
    symbol_viewBox=$(echo "$symbol_xml" | dasel select -r -f yaml 'viewBox')
    : "${symbol_viewBox:='0 0 100 100'}"

    # Create new SVG content
    new_svg="<svg xmlns='http://www.w3.org/2000/svg' viewBox='$symbol_viewBox'>
$(echo "$symbol_xml" | sed 's/^/  /')
  <use href='#$symbol_id' />
</svg>"

    # Write to output file
    echo "$new_svg" > "${symbol_id}.svg"
    echo "Created ${symbol_id}.svg"
    
    i=$((i + 1))
done

echo "Extraction complete"