/*
* Copyright (c) 2010, 2011, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package com.sun.tools.doclets.formats.html.markup;
import java.util.*;
import com.sun.tools.doclets.internal.toolkit.Content;
import com.sun.tools.doclets.internal.toolkit.util.*;
/**
* Class for generating HTML tree for javadoc output.
*
* @author Bhavesh Patel
*/
public class HtmlTree extends Content {
private HtmlTag htmlTag;
private Map<HtmlAttr,String> attrs = Collections.<HtmlAttr,String>emptyMap();
private List<Content> content = Collections.<Content>emptyList();
public static final Content EMPTY = new StringContent("");
/**
* Constructor to construct HtmlTree object.
*
* @param tag HTML tag for the HtmlTree object
*/
public HtmlTree(HtmlTag tag) {
htmlTag = nullCheck(tag);
}
/**
* Constructor to construct HtmlTree object.
*
* @param tag HTML tag for the HtmlTree object
* @param contents contents to be added to the tree
*/
public HtmlTree(HtmlTag tag, Content... contents) {
this(tag);
for (Content content: contents)
addContent(content);
}
/**
* Adds an attribute for the HTML tag.
*
* @param attrName name of the attribute
* @param attrValue value of the attribute
*/
public void addAttr(HtmlAttr attrName, String attrValue) {
if (attrs.isEmpty())
attrs = new LinkedHashMap<HtmlAttr,String>();
attrs.put(nullCheck(attrName), nullCheck(attrValue));
}
/**
* Adds a style for the HTML tag.
*
* @param style style to be added
*/
public void addStyle(HtmlStyle style) {
addAttr(HtmlAttr.CLASS, style.toString());
}
/**
* Adds content for the HTML tag.
*
* @param tagContent tag content to be added
*/
public void addContent(Content tagContent) {
if (tagContent == HtmlTree.EMPTY || tagContent.isValid()) {
if (content.isEmpty())
content = new ArrayList<Content>();
content.add(tagContent);
}
}
/**
* This method adds a string content to the htmltree. If the last content member
* added is a StringContent, append the string to that StringContent or else
* create a new StringContent and add it to the html tree.
*
* @param stringContent string content that needs to be added
*/
public void addContent(String stringContent) {
if (!content.isEmpty()) {
Content lastContent = content.get(content.size() - 1);
if (lastContent instanceof StringContent)
lastContent.addContent(stringContent);
else
addContent(new StringContent(stringContent));
}
else
addContent(new StringContent(stringContent));
}
/**
* Generates an HTML anchor tag.
*
* @param ref reference url for the anchor tag
* @param body content for the anchor tag
* @return an HtmlTree object
*/
public static HtmlTree A(String ref, Content body) {
HtmlTree htmltree = new HtmlTree(HtmlTag.A, nullCheck(body));
htmltree.addAttr(HtmlAttr.HREF, nullCheck(ref));
return htmltree;
}
/**
* Generates an HTML anchor tag with name attribute and content.
*
* @param name name for the anchor tag
* @param body content for the anchor tag
* @return an HtmlTree object
*/
public static HtmlTree A_NAME(String name, Content body) {
HtmlTree htmltree = HtmlTree.A_NAME(name);
htmltree.addContent(nullCheck(body));
return htmltree;
}
/**
* Generates an HTML anchor tag with name attribute.
*
* @param name name for the anchor tag
* @return an HtmlTree object
*/
public static HtmlTree A_NAME(String name) {
HtmlTree htmltree = new HtmlTree(HtmlTag.A);
htmltree.addAttr(HtmlAttr.NAME, nullCheck(name));
return htmltree;
}
/**
* Generates a CAPTION tag with some content.
*
* @param body content for the tag
* @return an HtmlTree object for the CAPTION tag
*/
public static HtmlTree CAPTION(Content body) {
HtmlTree htmltree = new HtmlTree(HtmlTag.CAPTION, nullCheck(body));
return htmltree;
}
/**
* Generates a CODE tag with some content.
*
* @param body content for the tag
* @return an HtmlTree object for the CODE tag
*/
public static HtmlTree CODE(Content body) {
HtmlTree htmltree = new HtmlTree(HtmlTag.CODE, nullCheck(body));
return htmltree;
}
/**
* Generates a DD tag with some content.
*
* @param body content for the tag
* @return an HtmlTree object for the DD tag
*/
public static HtmlTree DD(Content body) {
HtmlTree htmltree = new HtmlTree(HtmlTag.DD, nullCheck(body));
return htmltree;
}
/**
* Generates a DL tag with some content.
*
* @param body content for the tag
* @return an HtmlTree object for the DL tag
*/
public static HtmlTree DL(Content body) {
HtmlTree htmltree = new HtmlTree(HtmlTag.DL, nullCheck(body));
return htmltree;
}
/**
* Generates a DIV tag with the style class attributes. It also encloses
* a content.
*
* @param styleClass stylesheet class for the tag
* @param body content for the tag
* @return an HtmlTree object for the DIV tag
*/
public static HtmlTree DIV(HtmlStyle styleClass, Content body) {
HtmlTree htmltree = new HtmlTree(HtmlTag.DIV, nullCheck(body));
if (styleClass != null)
htmltree.addStyle(styleClass);
return htmltree;
}
/**
* Generates a DIV tag with some content.
*
* @param body content for the tag
* @return an HtmlTree object for the DIV tag
*/
public static HtmlTree DIV(Content body) {
return DIV(null, body);
}
/**
* Generates a DT tag with some content.
*
* @param body content for the tag
* @return an HtmlTree object for the DT tag
*/
public static HtmlTree DT(Content body) {
HtmlTree htmltree = new HtmlTree(HtmlTag.DT, nullCheck(body));
return htmltree;
}
/**
* Generates a EM tag with some content.
*
* @param body content to be added to the tag
* @return an HtmlTree object for the EM tag
*/
public static HtmlTree EM(Content body) {
HtmlTree htmltree = new HtmlTree(HtmlTag.EM, nullCheck(body));
return htmltree;
}
/**
* Generates a FRAME tag.
*
* @param src the url of the document to be shown in the frame
* @param name specifies the name of the frame
* @param title the title for the frame
* @param scrolling specifies whether to display scrollbars in the frame
* @return an HtmlTree object for the FRAME tag
*/
public static HtmlTree FRAME(String src, String name, String title, String scrolling) {
HtmlTree htmltree = new HtmlTree(HtmlTag.FRAME);
htmltree.addAttr(HtmlAttr.SRC, nullCheck(src));
htmltree.addAttr(HtmlAttr.NAME, nullCheck(name));
htmltree.addAttr(HtmlAttr.TITLE, nullCheck(title));
if (scrolling != null)
htmltree.addAttr(HtmlAttr.SCROLLING, scrolling);
return htmltree;
}
/**
* Generates a Frame tag.
*
* @param src the url of the document to be shown in the frame
* @param name specifies the name of the frame
* @param title the title for the frame
* @return an HtmlTree object for the SPAN tag
*/
public static HtmlTree FRAME(String src, String name, String title) {
return FRAME(src, name, title, null);
}
/**
* Generates a FRAMESET tag.
*
* @param cols the size of columns in the frameset
* @param rows the size of rows in the frameset
* @param title the title for the frameset
* @param onload the script to run when the document loads
* @return an HtmlTree object for the FRAMESET tag
*/
public static HtmlTree FRAMESET(String cols, String rows, String title, String onload) {
HtmlTree htmltree = new HtmlTree(HtmlTag.FRAMESET);
if (cols != null)
htmltree.addAttr(HtmlAttr.COLS, cols);
if (rows != null)
htmltree.addAttr(HtmlAttr.ROWS, rows);
htmltree.addAttr(HtmlAttr.TITLE, nullCheck(title));
htmltree.addAttr(HtmlAttr.ONLOAD, nullCheck(onload));
return htmltree;
}
/**
* Generates a heading tag (h1 to h6) with the title and style class attributes. It also encloses
* a content.
*
* @param headingTag the heading tag to be generated
* @param printTitle true if title for the tag needs to be printed else false
* @param styleClass stylesheet class for the tag
* @param body content for the tag
* @return an HtmlTree object for the tag
*/
public static HtmlTree HEADING(HtmlTag headingTag, boolean printTitle,
HtmlStyle styleClass, Content body) {
HtmlTree htmltree = new HtmlTree(headingTag, nullCheck(body));
if (printTitle)
htmltree.addAttr(HtmlAttr.TITLE, Util.stripHtml(body.toString()));
if (styleClass != null)
htmltree.addStyle(styleClass);
return htmltree;
}
/**
* Generates a heading tag (h1 to h6) with style class attribute. It also encloses
* a content.
*
* @param headingTag the heading tag to be generated
* @param styleClass stylesheet class for the tag
* @param body content for the tag
* @return an HtmlTree object for the tag
*/
public static HtmlTree HEADING(HtmlTag headingTag, HtmlStyle styleClass, Content body) {
return HEADING(headingTag, false, styleClass, body);
}
/**
* Generates a heading tag (h1 to h6) with the title attribute. It also encloses
* a content.
*
* @param headingTag the heading tag to be generated
* @param printTitle true if the title for the tag needs to be printed else false
* @param body content for the tag
* @return an HtmlTree object for the tag
*/
public static HtmlTree HEADING(HtmlTag headingTag, boolean printTitle, Content body) {
return HEADING(headingTag, printTitle, null, body);
}
/**
* Generates a heading tag (h1 to h6) with some content.
*
* @param headingTag the heading tag to be generated
* @param body content for the tag
* @return an HtmlTree object for the tag
*/
public static HtmlTree HEADING(HtmlTag headingTag, Content body) {
return HEADING(headingTag, false, null, body);
}
/**
* Generates an HTML tag with lang attribute. It also adds head and body
* content to the HTML tree.
*
* @param lang language for the HTML document
* @param head head for the HTML tag
* @param body body for the HTML tag
* @return an HtmlTree object for the HTML tag
*/
public static HtmlTree HTML(String lang, Content head, Content body) {
HtmlTree htmltree = new HtmlTree(HtmlTag.HTML, nullCheck(head), nullCheck(body));
htmltree.addAttr(HtmlAttr.LANG, nullCheck(lang));
return htmltree;
}
/**
* Generates a I tag with some content.
*
* @param body content for the tag
* @return an HtmlTree object for the I tag
*/
public static HtmlTree I(Content body) {
HtmlTree htmltree = new HtmlTree(HtmlTag.I, nullCheck(body));
return htmltree;
}
/**
* Generates a LI tag with some content.
*
* @param body content for the tag
* @return an HtmlTree object for the LI tag
*/
public static HtmlTree LI(Content body) {
return LI(null, body);
}
/**
* Generates a LI tag with some content.
*
* @param styleClass style for the tag
* @param body content for the tag
* @return an HtmlTree object for the LI tag
*/
public static HtmlTree LI(HtmlStyle styleClass, Content body) {
HtmlTree htmltree = new HtmlTree(HtmlTag.LI, nullCheck(body));
if (styleClass != null)
htmltree.addStyle(styleClass);
return htmltree;
}
/**
* Generates a LINK tag with the rel, type, href and title attributes.
*
* @param rel relevance of the link
* @param type type of link
* @param href the path for the link
* @param title title for the link
* @return an HtmlTree object for the LINK tag
*/
public static HtmlTree LINK(String rel, String type, String href, String title) {
HtmlTree htmltree = new HtmlTree(HtmlTag.LINK);
htmltree.addAttr(HtmlAttr.REL, nullCheck(rel));
htmltree.addAttr(HtmlAttr.TYPE, nullCheck(type));
htmltree.addAttr(HtmlAttr.HREF, nullCheck(href));
htmltree.addAttr(HtmlAttr.TITLE, nullCheck(title));
return htmltree;
}
/**
* Generates a META tag with the http-equiv, content and charset attributes.
*
* @param http-equiv http equiv attribute for the META tag
* @param content type of content
* @param charset character set used
* @return an HtmlTree object for the META tag
*/
public static HtmlTree META(String httpEquiv, String content, String charSet) {
HtmlTree htmltree = new HtmlTree(HtmlTag.META);
htmltree.addAttr(HtmlAttr.HTTP_EQUIV, nullCheck(httpEquiv));
htmltree.addAttr(HtmlAttr.CONTENT, nullCheck(content));
htmltree.addAttr(HtmlAttr.CHARSET, nullCheck(charSet));
return htmltree;
}
/**
* Generates a META tag with the name and content attributes.
*
* @param name name attribute
* @param content type of content
* @return an HtmlTree object for the META tag
*/
public static HtmlTree META(String name, String content) {
HtmlTree htmltree = new HtmlTree(HtmlTag.META);
htmltree.addAttr(HtmlAttr.NAME, nullCheck(name));
htmltree.addAttr(HtmlAttr.CONTENT, nullCheck(content));
return htmltree;
}
/**
* Generates a NOSCRIPT tag with some content.
*
* @param body content of the noscript tag
* @return an HtmlTree object for the NOSCRIPT tag
*/
public static HtmlTree NOSCRIPT(Content body) {
HtmlTree htmltree = new HtmlTree(HtmlTag.NOSCRIPT, nullCheck(body));
return htmltree;
}
/**
* Generates a P tag with some content.
*
* @param body content of the Paragraph tag
* @return an HtmlTree object for the P tag
*/
public static HtmlTree P(Content body) {
return P(null, body);
}
/**
* Generates a P tag with some content.
*
* @param styleClass style of the Paragraph tag
* @param body content of the Paragraph tag
* @return an HtmlTree object for the P tag
*/
public static HtmlTree P(HtmlStyle styleClass, Content body) {
HtmlTree htmltree = new HtmlTree(HtmlTag.P, nullCheck(body));
if (styleClass != null)
htmltree.addStyle(styleClass);
return htmltree;
}
/**
* Generates a SMALL tag with some content.
*
* @param body content for the tag
* @return an HtmlTree object for the SMALL tag
*/
public static HtmlTree SMALL(Content body) {
HtmlTree htmltree = new HtmlTree(HtmlTag.SMALL, nullCheck(body));
return htmltree;
}
/**
* Generates a STRONG tag with some content.
*
* @param body content for the tag
* @return an HtmlTree object for the STRONG tag
*/
public static HtmlTree STRONG(Content body) {
HtmlTree htmltree = new HtmlTree(HtmlTag.STRONG, nullCheck(body));
return htmltree;
}
/**
* Generates a SPAN tag with some content.
*
* @param body content for the tag
* @return an HtmlTree object for the SPAN tag
*/
public static HtmlTree SPAN(Content body) {
return SPAN(null, body);
}
/**
* Generates a SPAN tag with style class attribute and some content.
*
* @param styleClass style class for the tag
* @param body content for the tag
* @return an HtmlTree object for the SPAN tag
*/
public static HtmlTree SPAN(HtmlStyle styleClass, Content body) {
HtmlTree htmltree = new HtmlTree(HtmlTag.SPAN, nullCheck(body));
if (styleClass != null)
htmltree.addStyle(styleClass);
return htmltree;
}
/**
* Generates a Table tag with border, width and summary attributes and
* some content.
*
* @param border border for the table
* @param width width of the table
* @param summary summary for the table
* @param body content for the table
* @return an HtmlTree object for the TABLE tag
*/
public static HtmlTree TABLE(int border, int width, String summary,
Content body) {
HtmlTree htmltree = new HtmlTree(HtmlTag.TABLE, nullCheck(body));
htmltree.addAttr(HtmlAttr.BORDER, Integer.toString(border));
htmltree.addAttr(HtmlAttr.WIDTH, Integer.toString(width));
htmltree.addAttr(HtmlAttr.SUMMARY, nullCheck(summary));
return htmltree;
}
/**
* Generates a Table tag with style class, border, cell padding,
* cellspacing and summary attributes and some content.
*
* @param styleClass style of the table
* @param border border for the table
* @param cellPadding cell padding for the table
* @param cellSpacing cell spacing for the table
* @param summary summary for the table
* @param body content for the table
* @return an HtmlTree object for the TABLE tag
*/
public static HtmlTree TABLE(HtmlStyle styleClass, int border, int cellPadding,
int cellSpacing, String summary, Content body) {
HtmlTree htmltree = new HtmlTree(HtmlTag.TABLE, nullCheck(body));
if (styleClass != null)
htmltree.addStyle(styleClass);
htmltree.addAttr(HtmlAttr.BORDER, Integer.toString(border));
htmltree.addAttr(HtmlAttr.CELLPADDING, Integer.toString(cellPadding));
htmltree.addAttr(HtmlAttr.CELLSPACING, Integer.toString(cellSpacing));
htmltree.addAttr(HtmlAttr.SUMMARY, nullCheck(summary));
return htmltree;
}
/**
* Generates a Table tag with border, cell padding,
* cellspacing and summary attributes and some content.
*
* @param border border for the table
* @param cellPadding cell padding for the table
* @param cellSpacing cell spacing for the table
* @param summary summary for the table
* @param body content for the table
* @return an HtmlTree object for the TABLE tag
*/
public static HtmlTree TABLE(int border, int cellPadding,
int cellSpacing, String summary, Content body) {
return TABLE(null, border, cellPadding, cellSpacing, summary, body);
}
/**
* Generates a TD tag with style class attribute and some content.
*
* @param styleClass style for the tag
* @param body content for the tag
* @return an HtmlTree object for the TD tag
*/
public static HtmlTree TD(HtmlStyle styleClass, Content body) {
HtmlTree htmltree = new HtmlTree(HtmlTag.TD, nullCheck(body));
if (styleClass != null)
htmltree.addStyle(styleClass);
return htmltree;
}
/**
* Generates a TD tag for an HTML table with some content.
*
* @param body content for the tag
* @return an HtmlTree object for the TD tag
*/
public static HtmlTree TD(Content body) {
return TD(null, body);
}
/**
* Generates a TH tag with style class and scope attributes and some content.
*
* @param styleClass style for the tag
* @param scope scope of the tag
* @param body content for the tag
* @return an HtmlTree object for the TH tag
*/
public static HtmlTree TH(HtmlStyle styleClass, String scope, Content body) {
HtmlTree htmltree = new HtmlTree(HtmlTag.TH, nullCheck(body));
if (styleClass != null)
htmltree.addStyle(styleClass);
htmltree.addAttr(HtmlAttr.SCOPE, nullCheck(scope));
return htmltree;
}
/**
* Generates a TH tag with scope attribute and some content.
*
* @param scope scope of the tag
* @param body content for the tag
* @return an HtmlTree object for the TH tag
*/
public static HtmlTree TH(String scope, Content body) {
return TH(null, scope, body);
}
/**
* Generates a TITLE tag with some content.
*
* @param body content for the tag
* @return an HtmlTree object for the TITLE tag
*/
public static HtmlTree TITLE(Content body) {
HtmlTree htmltree = new HtmlTree(HtmlTag.TITLE, nullCheck(body));
return htmltree;
}
/**
* Generates a TR tag for an HTML table with some content.
*
* @param body content for the tag
* @return an HtmlTree object for the TR tag
*/
public static HtmlTree TR(Content body) {
HtmlTree htmltree = new HtmlTree(HtmlTag.TR, nullCheck(body));
return htmltree;
}
/**
* Generates a UL tag with the style class attribute and some content.
*
* @param styleClass style for the tag
* @param body content for the tag
* @return an HtmlTree object for the UL tag
*/
public static HtmlTree UL(HtmlStyle styleClass, Content body) {
HtmlTree htmltree = new HtmlTree(HtmlTag.UL, nullCheck(body));
htmltree.addStyle(nullCheck(styleClass));
return htmltree;
}
/**
* {@inheritDoc}
*/
public boolean isEmpty() {
return (!hasContent() && !hasAttrs());
}
/**
* Returns true if the HTML tree has content.
*
* @return true if the HTML tree has content else return false
*/
public boolean hasContent() {
return (!content.isEmpty());
}
/**
* Returns true if the HTML tree has attributes.
*
* @return true if the HTML tree has attributes else return false
*/
public boolean hasAttrs() {
return (!attrs.isEmpty());
}
/**
* Returns true if the HTML tree has a specific attribute.
*
* @param attrName name of the attribute to check within the HTML tree
* @return true if the HTML tree has the specified attribute else return false
*/
public boolean hasAttr(HtmlAttr attrName) {
return (attrs.containsKey(attrName));
}
/**
* Returns true if the HTML tree is valid. This check is more specific to
* standard doclet and not exactly similar to W3C specifications. But it
* ensures HTML validation.
*
* @return true if the HTML tree is valid
*/
public boolean isValid() {
switch (htmlTag) {
case A :
return (hasAttr(HtmlAttr.NAME) || (hasAttr(HtmlAttr.HREF) && hasContent()));
case BR :
return (!hasContent() && (!hasAttrs() || hasAttr(HtmlAttr.CLEAR)));
case FRAME :
return (hasAttr(HtmlAttr.SRC) && !hasContent());
case HR :
return (!hasContent());
case IMG :
return (hasAttr(HtmlAttr.SRC) && hasAttr(HtmlAttr.ALT) && !hasContent());
case LINK :
return (hasAttr(HtmlAttr.HREF) && !hasContent());
case META :
return (hasAttr(HtmlAttr.CONTENT) && !hasContent());
default :
return hasContent();
}
}
/**
* Returns true if the element is an inline element.
*
* @return true if the HTML tag is an inline element
*/
public boolean isInline() {
return (htmlTag.blockType == HtmlTag.BlockType.INLINE);
}
/**
* {@inheritDoc}
*/
public void write(StringBuilder contentBuilder) {
if (!isInline() && !endsWithNewLine(contentBuilder))
contentBuilder.append(DocletConstants.NL);
String tagString = htmlTag.toString();
contentBuilder.append("<");
contentBuilder.append(tagString);
Iterator<HtmlAttr> iterator = attrs.keySet().iterator();
HtmlAttr key;
String value = "";
while (iterator.hasNext()) {
key = iterator.next();
value = attrs.get(key);
contentBuilder.append(" ");
contentBuilder.append(key.toString());
if (!value.isEmpty()) {
contentBuilder.append("=\"");
contentBuilder.append(value);
contentBuilder.append("\"");
}
}
contentBuilder.append(">");
for (Content c : content)
c.write(contentBuilder);
if (htmlTag.endTagRequired()) {
contentBuilder.append("</");
contentBuilder.append(tagString);
contentBuilder.append(">");
}
if (!isInline())
contentBuilder.append(DocletConstants.NL);
}
}