com.itextpdf.text.html.simpleparser.ChainedProperties Maven / Gradle / Ivy
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package com.itextpdf.text.html.simpleparser;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import com.itextpdf.text.html.HtmlTags;
import com.itextpdf.text.html.HtmlUtilities;
/**
* Stores the hierarchy of tags along with the attributes of each tag.
* @since 5.0.6 renamed from ChainedProperties
* @deprecated since 5.5.2
*/
@Deprecated
public class ChainedProperties {
/**
* Class that stores the info about one tag in the chain.
*/
private static final class TagAttributes {
/** A possible tag */
final String tag;
/** The styles corresponding with the tag */
final Map attrs;
/**
* Constructs a chained property.
* @param tag an XML/HTML tag
* @param attrs the tag's attributes
*/
TagAttributes(String tag, Map attrs) {
this.tag = tag;
this.attrs = attrs;
}
}
/** A list of chained properties representing the tag hierarchy. */
public List chain = new ArrayList();
/** Creates a new instance of ChainedProperties */
public ChainedProperties() {
}
/**
* Walks through the hierarchy (bottom-up) looking for
* a property key. Returns a value as soon as a match
* is found or null if the key can't be found.
* @param key the key of the property
* @return the value of the property
*/
public String getProperty(String key) {
for (int k = chain.size() - 1; k >= 0; --k) {
TagAttributes p = chain.get(k);
Map attrs = p.attrs;
String ret = attrs.get(key);
if (ret != null)
return ret;
}
return null;
}
/**
* Walks through the hierarchy (bottom-up) looking for
* a property key. Returns true as soon as a match is
* found or false if the key can't be found.
* @param key the key of the property
* @return true if the key is found
*/
public boolean hasProperty(String key) {
for (int k = chain.size() - 1; k >= 0; --k) {
TagAttributes p = chain.get(k);
Map attrs = p.attrs;
if (attrs.containsKey(key))
return true;
}
return false;
}
/**
* Adds a tag and its corresponding properties to the chain.
* @param tag the tags that needs to be added to the chain
* @param props the tag's attributes
*/
public void addToChain(String tag, Map props) {
this.adjustFontSize(props);
chain.add(new TagAttributes(tag, props));
}
/**
* Walks through the hierarchy (bottom-up) and removes the
* first occurrence of a tag that is encountered.
* @param tag the tag that needs to be removed
*/
public void removeChain(String tag) {
for (int k = chain.size() - 1; k >= 0; --k) {
if (tag.equals(chain.get(k).tag)) {
chain.remove(k);
return;
}
}
}
/**
* If the properties contain a font size, the size may need to
* be adjusted based on font sizes higher in the hierarchy.
* @param attrs the attributes that may have to be updated
* @since 5.0.6 (renamed)
*/
protected void adjustFontSize(Map attrs) {
// fetch the font size
String value = attrs.get(HtmlTags.SIZE);
// do nothing if the font size isn't defined
if (value == null)
return;
// the font is defined as a real size: remove "pt"
if (value.endsWith("pt")) {
attrs.put(HtmlTags.SIZE,
value.substring(0, value.length() - 2));
return;
}
String old = getProperty(HtmlTags.SIZE);
attrs.put(HtmlTags.SIZE, Integer.toString(HtmlUtilities.getIndexedFontSize(value, old)));
}
}