Include jsoup library for modifying bootstap page DOM (#9274)

1 files changed, 175 insertions, 0 deletions

diff --git a/src/org/jsoup/nodes/TextNode.java b/src/org/jsoup/nodes/TextNode.java
new file mode 100644
index 0000000000..9fd0feac8f
--- /dev/null
+++ b/src/org/jsoup/nodes/TextNode.java
@@ -0,0 +1,175 @@
+package org.jsoup.nodes;
+
+import org.jsoup.helper.StringUtil;
+import org.jsoup.helper.Validate;
+
+/**
+ A text node.
+
+ @author Jonathan Hedley, jonathan@hedley.net */
+public class TextNode extends Node {
+    /*
+    TextNode is a node, and so by default comes with attributes and children. The attributes are seldom used, but use
+    memory, and the child nodes are never used. So we don't have them, and override accessors to attributes to create
+    them as needed on the fly.
+     */
+    private static final String TEXT_KEY = "text";
+    String text;
+
+    /**
+     Create a new TextNode representing the supplied (unencoded) text).
+
+     @param text raw text
+     @param baseUri base uri
+     @see #createFromEncoded(String, String)
+     */
+    public TextNode(String text, String baseUri) {
+        this.baseUri = baseUri;
+        this.text = text;
+    }
+
+    public String nodeName() {
+        return "#text";
+    }
+    
+    /**
+     * Get the text content of this text node.
+     * @return Unencoded, normalised text.
+     * @see TextNode#getWholeText()
+     */
+    public String text() {
+        return normaliseWhitespace(getWholeText());
+    }
+    
+    /**
+     * Set the text content of this text node.
+     * @param text unencoded text
+     * @return this, for chaining
+     */
+    public TextNode text(String text) {
+        this.text = text;
+        if (attributes != null)
+            attributes.put(TEXT_KEY, text);
+        return this;
+    }
+
+    /**
+     Get the (unencoded) text of this text node, including any newlines and spaces present in the original.
+     @return text
+     */
+    public String getWholeText() {
+        return attributes == null ? text : attributes.get(TEXT_KEY);
+    }
+
+    /**
+     Test if this text node is blank -- that is, empty or only whitespace (including newlines).
+     @return true if this document is empty or only whitespace, false if it contains any text content.
+     */
+    public boolean isBlank() {
+        return StringUtil.isBlank(getWholeText());
+    }
+
+    /**
+     * Split this text node into two nodes at the specified string offset. After splitting, this node will contain the
+     * original text up to the offset, and will have a new text node sibling containing the text after the offset.
+     * @param offset string offset point to split node at.
+     * @return the newly created text node containing the text after the offset.
+     */
+    public TextNode splitText(int offset) {
+        Validate.isTrue(offset >= 0, "Split offset must be not be negative");
+        Validate.isTrue(offset < text.length(), "Split offset must not be greater than current text length");
+
+        String head = getWholeText().substring(0, offset);
+        String tail = getWholeText().substring(offset);
+        text(head);
+        TextNode tailNode = new TextNode(tail, this.baseUri());
+        if (parent() != null)
+            parent().addChildren(siblingIndex()+1, tailNode);
+
+        return tailNode;
+    }
+
+    void outerHtmlHead(StringBuilder accum, int depth, Document.OutputSettings out) {
+        String html = Entities.escape(getWholeText(), out);
+        if (out.prettyPrint() && parent() instanceof Element && !((Element) parent()).preserveWhitespace()) {
+            html = normaliseWhitespace(html);
+        }
+
+        if (out.prettyPrint() && siblingIndex() == 0 && parentNode instanceof Element && ((Element) parentNode).tag().formatAsBlock() && !isBlank())
+            indent(accum, depth, out);
+        accum.append(html);
+    }
+
+    void outerHtmlTail(StringBuilder accum, int depth, Document.OutputSettings out) {}
+
+    public String toString() {
+        return outerHtml();
+    }
+
+    /**
+     * Create a new TextNode from HTML encoded (aka escaped) data.
+     * @param encodedText Text containing encoded HTML (e.g. &amp;lt;)
+     * @return TextNode containing unencoded data (e.g. &lt;)
+     */
+    public static TextNode createFromEncoded(String encodedText, String baseUri) {
+        String text = Entities.unescape(encodedText);
+        return new TextNode(text, baseUri);
+    }
+
+    static String normaliseWhitespace(String text) {
+        text = StringUtil.normaliseWhitespace(text);
+        return text;
+    }
+
+    static String stripLeadingWhitespace(String text) {
+        return text.replaceFirst("^\\s+", "");
+    }
+
+    static boolean lastCharIsWhitespace(StringBuilder sb) {
+        return sb.length() != 0 && sb.charAt(sb.length() - 1) == ' ';
+    }
+
+    // attribute fiddling. create on first access.
+    private void ensureAttributes() {
+        if (attributes == null) {
+            attributes = new Attributes();
+            attributes.put(TEXT_KEY, text);
+        }
+    }
+
+    @Override
+    public String attr(String attributeKey) {
+        ensureAttributes();
+        return super.attr(attributeKey);
+    }
+
+    @Override
+    public Attributes attributes() {
+        ensureAttributes();
+        return super.attributes();
+    }
+
+    @Override
+    public Node attr(String attributeKey, String attributeValue) {
+        ensureAttributes();
+        return super.attr(attributeKey, attributeValue);
+    }
+
+    @Override
+    public boolean hasAttr(String attributeKey) {
+        ensureAttributes();
+        return super.hasAttr(attributeKey);
+    }
+
+    @Override
+    public Node removeAttr(String attributeKey) {
+        ensureAttributes();
+        return super.removeAttr(attributeKey);
+    }
+
+    @Override
+    public String absUrl(String attributeKey) {
+        ensureAttributes();
+        return super.absUrl(attributeKey);
+    }
+}