private String getSingleLineOfChildren(final List children) {
final StringBuilder result = new StringBuilder();
final Iterator childrenIt = children.iterator();
boolean isFirst = true;
while (childrenIt.hasNext()) {
final Object child = childrenIt.next();
if (!(child instanceof ContentNode)) {
return null;
} else {
String content = child.toString();
// if first item trims it from left
if (isFirst) {
content = Utils.ltrim(content);
}
// if last item trims it from right
if (!childrenIt.hasNext()) {
content = Utils.rtrim(content);
}
if (content.indexOf('\n') >= 0 || content.indexOf('\r') >= 0) {
return null;
}
result.append(content);
}
isFirst = false;
}
return result.toString();
}
protected void serializePrettyHtml(
final TagNode tagNode,
final Writer writer,
final int level,
final boolean isPreserveWhitespaces,
final boolean isLastNewLine)
throws IOException {
final List tagChildren = tagNode.getChildren();
final String tagName = tagNode.getName();
final boolean isHeadlessNode = Utils.isEmptyString(tagName);
final String indent = isHeadlessNode ? "" : getIndent(level);
if (!isPreserveWhitespaces) {
if (!isLastNewLine) {
writer.write("\n");
}
writer.write(indent);
}
serializeOpenTag(tagNode, writer, true);
final boolean preserveWhitespaces = isPreserveWhitespaces || "pre".equalsIgnoreCase(tagName);
boolean lastWasNewLine = false;
if (!isMinimizedTagSyntax(tagNode)) {
final String singleLine = getSingleLineOfChildren(tagChildren);
final boolean dontEscape = dontEscape(tagNode);
if (!preserveWhitespaces && singleLine != null) {
writer.write(!dontEscape(tagNode) ? escapeText(singleLine) : singleLine);
} else {
final Iterator childIterator = tagChildren.iterator();
while (childIterator.hasNext()) {
final Object child = childIterator.next();
if (child instanceof TagNode) {
serializePrettyHtml(
(TagNode) child,
writer,
isHeadlessNode ? level : level + 1,
preserveWhitespaces,
lastWasNewLine);
lastWasNewLine = false;
} else if (child instanceof ContentNode) {
final String content = dontEscape ? child.toString() : escapeText(child.toString());
if (content.length() > 0) {
if (dontEscape || preserveWhitespaces) {
writer.write(content);
} else if (Character.isWhitespace(content.charAt(0))) {
if (!lastWasNewLine) {
writer.write("\n");
lastWasNewLine = false;
}
if (content.trim().length() > 0) {
writer.write(
getIndentedText(Utils.rtrim(content), isHeadlessNode ? level : level + 1));
} else {
lastWasNewLine = true;
}
} else {
if (content.trim().length() > 0) {
writer.write(Utils.rtrim(content));
}
if (!childIterator.hasNext()) {
writer.write("\n");
lastWasNewLine = true;
}
}
}
} else if (child instanceof CommentNode) {
if (!lastWasNewLine && !preserveWhitespaces) {
writer.write("\n");
lastWasNewLine = false;
}
final CommentNode commentNode = (CommentNode) child;
final String content = commentNode.getCommentedContent();
writer.write(
dontEscape
? content
: getIndentedText(content, isHeadlessNode ? level : level + 1));
}
}
}
if (singleLine == null && !preserveWhitespaces) {
if (!lastWasNewLine) {
writer.write("\n");
}
writer.write(indent);
}
serializeEndTag(tagNode, writer, false);
}
}