Package com.itextpdf.svg.css.impl

Class SvgStyleResolver

  • All Implemented Interfaces:
    ICssResolver
    public class SvgStyleResolver
extends java.lang.Object
implements ICssResolver
    Default implementation of SVG`s styles and attribute resolver .

    • Field Detail

      • INHERITANCE_RULES

        public static final java.util.Set<IStyleInheritance> INHERITANCE_RULES

      • DEFAULT_FONT_SIZE

        public static final float DEFAULT_FONT_SIZE

      • ELEMENTS_INHERITING_PARENT_STYLES

        private static final java.lang.String[] ELEMENTS_INHERITING_PARENT_STYLES

      • LOGGER

        private static final org.slf4j.Logger LOGGER

      • DEFAULT_CSS_PATH

        private static final java.lang.String DEFAULT_CSS_PATH
        See Also:
        Constant Field Values

      • isFirstSvgElement

        private boolean isFirstSvgElement

      • fonts

        private final java.util.List<CssFontFaceRule> fonts
        The list of fonts.

      • resourceResolver

        private final ResourceResolver resourceResolver
        The resource resolver

    • Constructor Detail

      • SvgStyleResolver

        public SvgStyleResolver​(java.io.InputStream defaultCssStream,
                        SvgProcessorContext context)
                 throws java.io.IOException
        Creates a SvgStyleResolver with a given default CSS.
        Parameters:
        defaultCssStream - the default CSS
        context - the processor context
        Throws:
        java.io.IOException - if any input/output issue occurs

      • SvgStyleResolver

        public SvgStyleResolver​(INode rootNode,
                        SvgProcessorContext context)
        Creates a SvgStyleResolver. This constructor will instantiate its internal style sheet and it will collect the css declarations from the provided node.
        Parameters:
        rootNode - node to collect css from
        context - the processor context

    • Method Detail

      • resolveFontSizeStyle

        public static void resolveFontSizeStyle​(java.util.Map<java.lang.String,​java.lang.String> styles,
                                        SvgCssContext cssContext,
                                        java.lang.String parentFontSizeStr)
        Resolves the font size stored inside the current element.
        Parameters:
        styles - attributes map of the current element
        cssContext - SvgCssContext instance in order to resolve relative font size
        parentFontSizeStr - parent font size value

      • isElementNested

        public static boolean isElementNested​(IElementNode element,
                                      java.lang.String parentElementNameForSearch)
        Checks whether element is nested within the passed parent element. Nesting is checked at several levels (recursively).
        Parameters:
        element - IElementNode element to check
        parentElementNameForSearch - expected parent element name
        Returns:
        true if element is nested within the expected parent, false otherwise

      • resolveStyles

        public java.util.Map<java.lang.String,​java.lang.String> resolveStyles​(INode element,
                                                                            AbstractCssContext context)
        Description copied from interface: ICssResolver
        Resolves the styles of a node given the passed context.
        Specified by:
        resolveStyles in interface ICssResolver
        Parameters:
        element - the node
        context - the CSS context (RootFontSize, etc.)
        Returns:
        the map containing the resolved styles

      • resolveNativeStyles

        public java.util.Map<java.lang.String,​java.lang.String> resolveNativeStyles​(INode node,
                                                                                  AbstractCssContext cssContext)
        Resolves node styles without inheritance of parent element styles.
        Parameters:
        node - the node
        cssContext - the CSS context (RootFontSize, etc.)
        Returns:
        the map containing the resolved styles that are defined in the body of the element

      • onlyNativeStylesShouldBeResolved

        private static boolean onlyNativeStylesShouldBeResolved​(IElementNode element)

      • putMissingVariables

        private static void putMissingVariables​(java.util.Map<java.lang.String,​java.lang.String> styles,
                                        java.util.Map<java.lang.String,​java.lang.String> parentStyles)
        Merge variables from parent node with current one. This is needed for svg elements like <defs>, which do not inherit parent styles, but do inherit css variables.
        Parameters:
        styles - current element styles to put variable in
        parentStyles - styles to search variables for

      • resolveStyles

        private java.util.Map<java.lang.String,​java.lang.String> resolveStyles​(INode element,
                                                                             SvgCssContext context)

      • processXLink

        private void processXLink​(IAttribute attr,
                          java.util.Map<java.lang.String,​java.lang.String> attributesMap)
        Resolves the full path of link href attribute, thanks to the resource resolver.
        Parameters:
        attr - the attribute to process
        attributesMap - the element styles map

      • isStartedWithHash

        private boolean isStartedWithHash​(java.lang.String s)
        Checks if string starts with #.
        Parameters:
        s - the test string
        Returns:
        true if the string starts with #, otherwise false

      • collectCssDeclarations

        private void collectCssDeclarations​(INode rootNode,
                                    ResourceResolver resourceResolver)

      • collectFonts

        private void collectFonts()
        Collects fonts from the style sheet.

      • collectFonts

        private void collectFonts​(CssStatement cssStatement)
        Collects fonts from a CssStatement.
        Parameters:
        cssStatement - the CSS statement

      • processAttribute

        private void processAttribute​(IAttribute attr,
                              java.util.Map<java.lang.String,​java.lang.String> styles)

      • parseStylesFromStyleAttribute

        private java.util.Map<java.lang.String,​java.lang.String> parseStylesFromStyleAttribute​(java.lang.String style)