Tue, 14 May 2013 10:14:54 -0700
8012174: {@literal} and {@code} should use \"new\" Taglet, not old.
Reviewed-by: darcy
1 /*
2 * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
26 package com.sun.tools.doclets.formats.html.markup;
28 import java.io.IOException;
29 import java.io.Writer;
30 import java.util.*;
32 import com.sun.tools.doclets.internal.toolkit.Content;
33 import com.sun.tools.doclets.internal.toolkit.util.*;
35 /**
36 * Class for generating HTML tree for javadoc output.
37 *
38 * <p><b>This is NOT part of any supported API.
39 * If you write code that depends on this, you do so at your own risk.
40 * This code and its internal interfaces are subject to change or
41 * deletion without notice.</b>
42 *
43 * @author Bhavesh Patel
44 */
45 public class HtmlTree extends Content {
47 private HtmlTag htmlTag;
48 private Map<HtmlAttr,String> attrs = Collections.<HtmlAttr,String>emptyMap();
49 private List<Content> content = Collections.<Content>emptyList();
50 public static final Content EMPTY = new StringContent("");
52 /**
53 * Constructor to construct HtmlTree object.
54 *
55 * @param tag HTML tag for the HtmlTree object
56 */
57 public HtmlTree(HtmlTag tag) {
58 htmlTag = nullCheck(tag);
59 }
61 /**
62 * Constructor to construct HtmlTree object.
63 *
64 * @param tag HTML tag for the HtmlTree object
65 * @param contents contents to be added to the tree
66 */
67 public HtmlTree(HtmlTag tag, Content... contents) {
68 this(tag);
69 for (Content content: contents)
70 addContent(content);
71 }
73 /**
74 * Adds an attribute for the HTML tag.
75 *
76 * @param attrName name of the attribute
77 * @param attrValue value of the attribute
78 */
79 public void addAttr(HtmlAttr attrName, String attrValue) {
80 if (attrs.isEmpty())
81 attrs = new LinkedHashMap<HtmlAttr,String>();
82 attrs.put(nullCheck(attrName), nullCheck(attrValue));
83 }
85 /**
86 * Adds a style for the HTML tag.
87 *
88 * @param style style to be added
89 */
90 public void addStyle(HtmlStyle style) {
91 addAttr(HtmlAttr.CLASS, style.toString());
92 }
94 /**
95 * Adds content for the HTML tag.
96 *
97 * @param tagContent tag content to be added
98 */
99 public void addContent(Content tagContent) {
100 if (tagContent == HtmlTree.EMPTY || tagContent.isValid()) {
101 if (content.isEmpty())
102 content = new ArrayList<Content>();
103 content.add(tagContent);
104 }
105 }
107 /**
108 * This method adds a string content to the htmltree. If the last content member
109 * added is a StringContent, append the string to that StringContent or else
110 * create a new StringContent and add it to the html tree.
111 *
112 * @param stringContent string content that needs to be added
113 */
114 public void addContent(String stringContent) {
115 if (!content.isEmpty()) {
116 Content lastContent = content.get(content.size() - 1);
117 if (lastContent instanceof StringContent)
118 lastContent.addContent(stringContent);
119 else
120 addContent(new StringContent(stringContent));
121 }
122 else
123 addContent(new StringContent(stringContent));
124 }
126 public int charCount() {
127 int n = 0;
128 for (Content c : content)
129 n += c.charCount();
130 return n;
131 }
133 /**
134 * Generates an HTML anchor tag.
135 *
136 * @param ref reference url for the anchor tag
137 * @param body content for the anchor tag
138 * @return an HtmlTree object
139 */
140 public static HtmlTree A(String ref, Content body) {
141 HtmlTree htmltree = new HtmlTree(HtmlTag.A, nullCheck(body));
142 htmltree.addAttr(HtmlAttr.HREF, Util.escapeHtmlChars(nullCheck(ref)));
143 return htmltree;
144 }
146 /**
147 * Generates an HTML anchor tag with name attribute and content.
148 *
149 * @param name name for the anchor tag
150 * @param body content for the anchor tag
151 * @return an HtmlTree object
152 */
153 public static HtmlTree A_NAME(String name, Content body) {
154 HtmlTree htmltree = HtmlTree.A_NAME(name);
155 htmltree.addContent(nullCheck(body));
156 return htmltree;
157 }
159 /**
160 * Generates an HTML anchor tag with name attribute.
161 *
162 * @param name name for the anchor tag
163 * @return an HtmlTree object
164 */
165 public static HtmlTree A_NAME(String name) {
166 HtmlTree htmltree = new HtmlTree(HtmlTag.A);
167 htmltree.addAttr(HtmlAttr.NAME, nullCheck(name));
168 return htmltree;
169 }
171 /**
172 * Generates a CAPTION tag with some content.
173 *
174 * @param body content for the tag
175 * @return an HtmlTree object for the CAPTION tag
176 */
177 public static HtmlTree CAPTION(Content body) {
178 HtmlTree htmltree = new HtmlTree(HtmlTag.CAPTION, nullCheck(body));
179 return htmltree;
180 }
182 /**
183 * Generates a CODE tag with some content.
184 *
185 * @param body content for the tag
186 * @return an HtmlTree object for the CODE tag
187 */
188 public static HtmlTree CODE(Content body) {
189 HtmlTree htmltree = new HtmlTree(HtmlTag.CODE, nullCheck(body));
190 return htmltree;
191 }
193 /**
194 * Generates a DD tag with some content.
195 *
196 * @param body content for the tag
197 * @return an HtmlTree object for the DD tag
198 */
199 public static HtmlTree DD(Content body) {
200 HtmlTree htmltree = new HtmlTree(HtmlTag.DD, nullCheck(body));
201 return htmltree;
202 }
204 /**
205 * Generates a DL tag with some content.
206 *
207 * @param body content for the tag
208 * @return an HtmlTree object for the DL tag
209 */
210 public static HtmlTree DL(Content body) {
211 HtmlTree htmltree = new HtmlTree(HtmlTag.DL, nullCheck(body));
212 return htmltree;
213 }
215 /**
216 * Generates a DIV tag with the style class attributes. It also encloses
217 * a content.
218 *
219 * @param styleClass stylesheet class for the tag
220 * @param body content for the tag
221 * @return an HtmlTree object for the DIV tag
222 */
223 public static HtmlTree DIV(HtmlStyle styleClass, Content body) {
224 HtmlTree htmltree = new HtmlTree(HtmlTag.DIV, nullCheck(body));
225 if (styleClass != null)
226 htmltree.addStyle(styleClass);
227 return htmltree;
228 }
230 /**
231 * Generates a DIV tag with some content.
232 *
233 * @param body content for the tag
234 * @return an HtmlTree object for the DIV tag
235 */
236 public static HtmlTree DIV(Content body) {
237 return DIV(null, body);
238 }
240 /**
241 * Generates a DT tag with some content.
242 *
243 * @param body content for the tag
244 * @return an HtmlTree object for the DT tag
245 */
246 public static HtmlTree DT(Content body) {
247 HtmlTree htmltree = new HtmlTree(HtmlTag.DT, nullCheck(body));
248 return htmltree;
249 }
251 /**
252 * Generates a EM tag with some content.
253 *
254 * @param body content to be added to the tag
255 * @return an HtmlTree object for the EM tag
256 */
257 public static HtmlTree EM(Content body) {
258 HtmlTree htmltree = new HtmlTree(HtmlTag.EM, nullCheck(body));
259 return htmltree;
260 }
262 /**
263 * Generates a FRAME tag.
264 *
265 * @param src the url of the document to be shown in the frame
266 * @param name specifies the name of the frame
267 * @param title the title for the frame
268 * @param scrolling specifies whether to display scrollbars in the frame
269 * @return an HtmlTree object for the FRAME tag
270 */
271 public static HtmlTree FRAME(String src, String name, String title, String scrolling) {
272 HtmlTree htmltree = new HtmlTree(HtmlTag.FRAME);
273 htmltree.addAttr(HtmlAttr.SRC, nullCheck(src));
274 htmltree.addAttr(HtmlAttr.NAME, nullCheck(name));
275 htmltree.addAttr(HtmlAttr.TITLE, nullCheck(title));
276 if (scrolling != null)
277 htmltree.addAttr(HtmlAttr.SCROLLING, scrolling);
278 return htmltree;
279 }
281 /**
282 * Generates a Frame tag.
283 *
284 * @param src the url of the document to be shown in the frame
285 * @param name specifies the name of the frame
286 * @param title the title for the frame
287 * @return an HtmlTree object for the SPAN tag
288 */
289 public static HtmlTree FRAME(String src, String name, String title) {
290 return FRAME(src, name, title, null);
291 }
293 /**
294 * Generates a FRAMESET tag.
295 *
296 * @param cols the size of columns in the frameset
297 * @param rows the size of rows in the frameset
298 * @param title the title for the frameset
299 * @param onload the script to run when the document loads
300 * @return an HtmlTree object for the FRAMESET tag
301 */
302 public static HtmlTree FRAMESET(String cols, String rows, String title, String onload) {
303 HtmlTree htmltree = new HtmlTree(HtmlTag.FRAMESET);
304 if (cols != null)
305 htmltree.addAttr(HtmlAttr.COLS, cols);
306 if (rows != null)
307 htmltree.addAttr(HtmlAttr.ROWS, rows);
308 htmltree.addAttr(HtmlAttr.TITLE, nullCheck(title));
309 htmltree.addAttr(HtmlAttr.ONLOAD, nullCheck(onload));
310 return htmltree;
311 }
313 /**
314 * Generates a heading tag (h1 to h6) with the title and style class attributes. It also encloses
315 * a content.
316 *
317 * @param headingTag the heading tag to be generated
318 * @param printTitle true if title for the tag needs to be printed else false
319 * @param styleClass stylesheet class for the tag
320 * @param body content for the tag
321 * @return an HtmlTree object for the tag
322 */
323 public static HtmlTree HEADING(HtmlTag headingTag, boolean printTitle,
324 HtmlStyle styleClass, Content body) {
325 HtmlTree htmltree = new HtmlTree(headingTag, nullCheck(body));
326 if (printTitle)
327 htmltree.addAttr(HtmlAttr.TITLE, Util.stripHtml(body.toString()));
328 if (styleClass != null)
329 htmltree.addStyle(styleClass);
330 return htmltree;
331 }
333 /**
334 * Generates a heading tag (h1 to h6) with style class attribute. It also encloses
335 * a content.
336 *
337 * @param headingTag the heading tag to be generated
338 * @param styleClass stylesheet class for the tag
339 * @param body content for the tag
340 * @return an HtmlTree object for the tag
341 */
342 public static HtmlTree HEADING(HtmlTag headingTag, HtmlStyle styleClass, Content body) {
343 return HEADING(headingTag, false, styleClass, body);
344 }
346 /**
347 * Generates a heading tag (h1 to h6) with the title attribute. It also encloses
348 * a content.
349 *
350 * @param headingTag the heading tag to be generated
351 * @param printTitle true if the title for the tag needs to be printed else false
352 * @param body content for the tag
353 * @return an HtmlTree object for the tag
354 */
355 public static HtmlTree HEADING(HtmlTag headingTag, boolean printTitle, Content body) {
356 return HEADING(headingTag, printTitle, null, body);
357 }
359 /**
360 * Generates a heading tag (h1 to h6) with some content.
361 *
362 * @param headingTag the heading tag to be generated
363 * @param body content for the tag
364 * @return an HtmlTree object for the tag
365 */
366 public static HtmlTree HEADING(HtmlTag headingTag, Content body) {
367 return HEADING(headingTag, false, null, body);
368 }
370 /**
371 * Generates an HTML tag with lang attribute. It also adds head and body
372 * content to the HTML tree.
373 *
374 * @param lang language for the HTML document
375 * @param head head for the HTML tag
376 * @param body body for the HTML tag
377 * @return an HtmlTree object for the HTML tag
378 */
379 public static HtmlTree HTML(String lang, Content head, Content body) {
380 HtmlTree htmltree = new HtmlTree(HtmlTag.HTML, nullCheck(head), nullCheck(body));
381 htmltree.addAttr(HtmlAttr.LANG, nullCheck(lang));
382 return htmltree;
383 }
385 /**
386 * Generates a I tag with some content.
387 *
388 * @param body content for the tag
389 * @return an HtmlTree object for the I tag
390 */
391 public static HtmlTree I(Content body) {
392 HtmlTree htmltree = new HtmlTree(HtmlTag.I, nullCheck(body));
393 return htmltree;
394 }
396 /**
397 * Generates a LI tag with some content.
398 *
399 * @param body content for the tag
400 * @return an HtmlTree object for the LI tag
401 */
402 public static HtmlTree LI(Content body) {
403 return LI(null, body);
404 }
406 /**
407 * Generates a LI tag with some content.
408 *
409 * @param styleClass style for the tag
410 * @param body content for the tag
411 * @return an HtmlTree object for the LI tag
412 */
413 public static HtmlTree LI(HtmlStyle styleClass, Content body) {
414 HtmlTree htmltree = new HtmlTree(HtmlTag.LI, nullCheck(body));
415 if (styleClass != null)
416 htmltree.addStyle(styleClass);
417 return htmltree;
418 }
420 /**
421 * Generates a LINK tag with the rel, type, href and title attributes.
422 *
423 * @param rel relevance of the link
424 * @param type type of link
425 * @param href the path for the link
426 * @param title title for the link
427 * @return an HtmlTree object for the LINK tag
428 */
429 public static HtmlTree LINK(String rel, String type, String href, String title) {
430 HtmlTree htmltree = new HtmlTree(HtmlTag.LINK);
431 htmltree.addAttr(HtmlAttr.REL, nullCheck(rel));
432 htmltree.addAttr(HtmlAttr.TYPE, nullCheck(type));
433 htmltree.addAttr(HtmlAttr.HREF, nullCheck(href));
434 htmltree.addAttr(HtmlAttr.TITLE, nullCheck(title));
435 return htmltree;
436 }
438 /**
439 * Generates a META tag with the http-equiv, content and charset attributes.
440 *
441 * @param httpEquiv http equiv attribute for the META tag
442 * @param content type of content
443 * @param charSet character set used
444 * @return an HtmlTree object for the META tag
445 */
446 public static HtmlTree META(String httpEquiv, String content, String charSet) {
447 HtmlTree htmltree = new HtmlTree(HtmlTag.META);
448 htmltree.addAttr(HtmlAttr.HTTP_EQUIV, nullCheck(httpEquiv));
449 htmltree.addAttr(HtmlAttr.CONTENT, nullCheck(content));
450 htmltree.addAttr(HtmlAttr.CHARSET, nullCheck(charSet));
451 return htmltree;
452 }
454 /**
455 * Generates a META tag with the name and content attributes.
456 *
457 * @param name name attribute
458 * @param content type of content
459 * @return an HtmlTree object for the META tag
460 */
461 public static HtmlTree META(String name, String content) {
462 HtmlTree htmltree = new HtmlTree(HtmlTag.META);
463 htmltree.addAttr(HtmlAttr.NAME, nullCheck(name));
464 htmltree.addAttr(HtmlAttr.CONTENT, nullCheck(content));
465 return htmltree;
466 }
468 /**
469 * Generates a NOSCRIPT tag with some content.
470 *
471 * @param body content of the noscript tag
472 * @return an HtmlTree object for the NOSCRIPT tag
473 */
474 public static HtmlTree NOSCRIPT(Content body) {
475 HtmlTree htmltree = new HtmlTree(HtmlTag.NOSCRIPT, nullCheck(body));
476 return htmltree;
477 }
479 /**
480 * Generates a P tag with some content.
481 *
482 * @param body content of the Paragraph tag
483 * @return an HtmlTree object for the P tag
484 */
485 public static HtmlTree P(Content body) {
486 return P(null, body);
487 }
489 /**
490 * Generates a P tag with some content.
491 *
492 * @param styleClass style of the Paragraph tag
493 * @param body content of the Paragraph tag
494 * @return an HtmlTree object for the P tag
495 */
496 public static HtmlTree P(HtmlStyle styleClass, Content body) {
497 HtmlTree htmltree = new HtmlTree(HtmlTag.P, nullCheck(body));
498 if (styleClass != null)
499 htmltree.addStyle(styleClass);
500 return htmltree;
501 }
503 /**
504 * Generates a SCRIPT tag with the type and src attributes.
505 *
506 * @param type type of link
507 * @param src the path for the script
508 * @return an HtmlTree object for the SCRIPT tag
509 */
510 public static HtmlTree SCRIPT(String type, String src) {
511 HtmlTree htmltree = new HtmlTree(HtmlTag.SCRIPT);
512 htmltree.addAttr(HtmlAttr.TYPE, nullCheck(type));
513 htmltree.addAttr(HtmlAttr.SRC, nullCheck(src));
514 return htmltree;
515 }
517 /**
518 * Generates a SMALL tag with some content.
519 *
520 * @param body content for the tag
521 * @return an HtmlTree object for the SMALL tag
522 */
523 public static HtmlTree SMALL(Content body) {
524 HtmlTree htmltree = new HtmlTree(HtmlTag.SMALL, nullCheck(body));
525 return htmltree;
526 }
528 /**
529 * Generates a STRONG tag with some content.
530 *
531 * @param body content for the tag
532 * @return an HtmlTree object for the STRONG tag
533 */
534 public static HtmlTree STRONG(Content body) {
535 HtmlTree htmltree = new HtmlTree(HtmlTag.STRONG, nullCheck(body));
536 return htmltree;
537 }
539 /**
540 * Generates a SPAN tag with some content.
541 *
542 * @param body content for the tag
543 * @return an HtmlTree object for the SPAN tag
544 */
545 public static HtmlTree SPAN(Content body) {
546 return SPAN(null, body);
547 }
549 /**
550 * Generates a SPAN tag with style class attribute and some content.
551 *
552 * @param styleClass style class for the tag
553 * @param body content for the tag
554 * @return an HtmlTree object for the SPAN tag
555 */
556 public static HtmlTree SPAN(HtmlStyle styleClass, Content body) {
557 HtmlTree htmltree = new HtmlTree(HtmlTag.SPAN, nullCheck(body));
558 if (styleClass != null)
559 htmltree.addStyle(styleClass);
560 return htmltree;
561 }
563 /**
564 * Generates a SPAN tag with id and style class attributes. It also encloses
565 * a content.
566 *
567 * @param id the id for the tag
568 * @param styleClass stylesheet class for the tag
569 * @param body content for the tag
570 * @return an HtmlTree object for the SPAN tag
571 */
572 public static HtmlTree SPAN(String id, HtmlStyle styleClass, Content body) {
573 HtmlTree htmltree = new HtmlTree(HtmlTag.SPAN, nullCheck(body));
574 htmltree.addAttr(HtmlAttr.ID, nullCheck(id));
575 if (styleClass != null)
576 htmltree.addStyle(styleClass);
577 return htmltree;
578 }
580 /**
581 * Generates a Table tag with border, width and summary attributes and
582 * some content.
583 *
584 * @param border border for the table
585 * @param width width of the table
586 * @param summary summary for the table
587 * @param body content for the table
588 * @return an HtmlTree object for the TABLE tag
589 */
590 public static HtmlTree TABLE(int border, int width, String summary,
591 Content body) {
592 HtmlTree htmltree = new HtmlTree(HtmlTag.TABLE, nullCheck(body));
593 htmltree.addAttr(HtmlAttr.BORDER, Integer.toString(border));
594 htmltree.addAttr(HtmlAttr.WIDTH, Integer.toString(width));
595 htmltree.addAttr(HtmlAttr.SUMMARY, nullCheck(summary));
596 return htmltree;
597 }
599 /**
600 * Generates a Table tag with style class, border, cell padding,
601 * cellspacing and summary attributes and some content.
602 *
603 * @param styleClass style of the table
604 * @param border border for the table
605 * @param cellPadding cell padding for the table
606 * @param cellSpacing cell spacing for the table
607 * @param summary summary for the table
608 * @param body content for the table
609 * @return an HtmlTree object for the TABLE tag
610 */
611 public static HtmlTree TABLE(HtmlStyle styleClass, int border, int cellPadding,
612 int cellSpacing, String summary, Content body) {
613 HtmlTree htmltree = new HtmlTree(HtmlTag.TABLE, nullCheck(body));
614 if (styleClass != null)
615 htmltree.addStyle(styleClass);
616 htmltree.addAttr(HtmlAttr.BORDER, Integer.toString(border));
617 htmltree.addAttr(HtmlAttr.CELLPADDING, Integer.toString(cellPadding));
618 htmltree.addAttr(HtmlAttr.CELLSPACING, Integer.toString(cellSpacing));
619 htmltree.addAttr(HtmlAttr.SUMMARY, nullCheck(summary));
620 return htmltree;
621 }
623 /**
624 * Generates a Table tag with border, cell padding,
625 * cellspacing and summary attributes and some content.
626 *
627 * @param border border for the table
628 * @param cellPadding cell padding for the table
629 * @param cellSpacing cell spacing for the table
630 * @param summary summary for the table
631 * @param body content for the table
632 * @return an HtmlTree object for the TABLE tag
633 */
634 public static HtmlTree TABLE(int border, int cellPadding,
635 int cellSpacing, String summary, Content body) {
636 return TABLE(null, border, cellPadding, cellSpacing, summary, body);
637 }
639 /**
640 * Generates a TD tag with style class attribute and some content.
641 *
642 * @param styleClass style for the tag
643 * @param body content for the tag
644 * @return an HtmlTree object for the TD tag
645 */
646 public static HtmlTree TD(HtmlStyle styleClass, Content body) {
647 HtmlTree htmltree = new HtmlTree(HtmlTag.TD, nullCheck(body));
648 if (styleClass != null)
649 htmltree.addStyle(styleClass);
650 return htmltree;
651 }
653 /**
654 * Generates a TD tag for an HTML table with some content.
655 *
656 * @param body content for the tag
657 * @return an HtmlTree object for the TD tag
658 */
659 public static HtmlTree TD(Content body) {
660 return TD(null, body);
661 }
663 /**
664 * Generates a TH tag with style class and scope attributes and some content.
665 *
666 * @param styleClass style for the tag
667 * @param scope scope of the tag
668 * @param body content for the tag
669 * @return an HtmlTree object for the TH tag
670 */
671 public static HtmlTree TH(HtmlStyle styleClass, String scope, Content body) {
672 HtmlTree htmltree = new HtmlTree(HtmlTag.TH, nullCheck(body));
673 if (styleClass != null)
674 htmltree.addStyle(styleClass);
675 htmltree.addAttr(HtmlAttr.SCOPE, nullCheck(scope));
676 return htmltree;
677 }
679 /**
680 * Generates a TH tag with scope attribute and some content.
681 *
682 * @param scope scope of the tag
683 * @param body content for the tag
684 * @return an HtmlTree object for the TH tag
685 */
686 public static HtmlTree TH(String scope, Content body) {
687 return TH(null, scope, body);
688 }
690 /**
691 * Generates a TITLE tag with some content.
692 *
693 * @param body content for the tag
694 * @return an HtmlTree object for the TITLE tag
695 */
696 public static HtmlTree TITLE(Content body) {
697 HtmlTree htmltree = new HtmlTree(HtmlTag.TITLE, nullCheck(body));
698 return htmltree;
699 }
701 /**
702 * Generates a TR tag for an HTML table with some content.
703 *
704 * @param body content for the tag
705 * @return an HtmlTree object for the TR tag
706 */
707 public static HtmlTree TR(Content body) {
708 HtmlTree htmltree = new HtmlTree(HtmlTag.TR, nullCheck(body));
709 return htmltree;
710 }
712 /**
713 * Generates a UL tag with the style class attribute and some content.
714 *
715 * @param styleClass style for the tag
716 * @param body content for the tag
717 * @return an HtmlTree object for the UL tag
718 */
719 public static HtmlTree UL(HtmlStyle styleClass, Content body) {
720 HtmlTree htmltree = new HtmlTree(HtmlTag.UL, nullCheck(body));
721 htmltree.addStyle(nullCheck(styleClass));
722 return htmltree;
723 }
725 /**
726 * {@inheritDoc}
727 */
728 public boolean isEmpty() {
729 return (!hasContent() && !hasAttrs());
730 }
732 /**
733 * Returns true if the HTML tree has content.
734 *
735 * @return true if the HTML tree has content else return false
736 */
737 public boolean hasContent() {
738 return (!content.isEmpty());
739 }
741 /**
742 * Returns true if the HTML tree has attributes.
743 *
744 * @return true if the HTML tree has attributes else return false
745 */
746 public boolean hasAttrs() {
747 return (!attrs.isEmpty());
748 }
750 /**
751 * Returns true if the HTML tree has a specific attribute.
752 *
753 * @param attrName name of the attribute to check within the HTML tree
754 * @return true if the HTML tree has the specified attribute else return false
755 */
756 public boolean hasAttr(HtmlAttr attrName) {
757 return (attrs.containsKey(attrName));
758 }
760 /**
761 * Returns true if the HTML tree is valid. This check is more specific to
762 * standard doclet and not exactly similar to W3C specifications. But it
763 * ensures HTML validation.
764 *
765 * @return true if the HTML tree is valid
766 */
767 public boolean isValid() {
768 switch (htmlTag) {
769 case A :
770 return (hasAttr(HtmlAttr.NAME) || (hasAttr(HtmlAttr.HREF) && hasContent()));
771 case BR :
772 return (!hasContent() && (!hasAttrs() || hasAttr(HtmlAttr.CLEAR)));
773 case FRAME :
774 return (hasAttr(HtmlAttr.SRC) && !hasContent());
775 case HR :
776 return (!hasContent());
777 case IMG :
778 return (hasAttr(HtmlAttr.SRC) && hasAttr(HtmlAttr.ALT) && !hasContent());
779 case LINK :
780 return (hasAttr(HtmlAttr.HREF) && !hasContent());
781 case META :
782 return (hasAttr(HtmlAttr.CONTENT) && !hasContent());
783 case SCRIPT :
784 return ((hasAttr(HtmlAttr.TYPE) && hasAttr(HtmlAttr.SRC) && !hasContent()) ||
785 (hasAttr(HtmlAttr.TYPE) && hasContent()));
786 default :
787 return hasContent();
788 }
789 }
791 /**
792 * Returns true if the element is an inline element.
793 *
794 * @return true if the HTML tag is an inline element
795 */
796 public boolean isInline() {
797 return (htmlTag.blockType == HtmlTag.BlockType.INLINE);
798 }
800 /**
801 * {@inheritDoc}
802 */
803 @Override
804 public boolean write(Writer out, boolean atNewline) throws IOException {
805 if (!isInline() && !atNewline)
806 out.write(DocletConstants.NL);
807 String tagString = htmlTag.toString();
808 out.write("<");
809 out.write(tagString);
810 Iterator<HtmlAttr> iterator = attrs.keySet().iterator();
811 HtmlAttr key;
812 String value = "";
813 while (iterator.hasNext()) {
814 key = iterator.next();
815 value = attrs.get(key);
816 out.write(" ");
817 out.write(key.toString());
818 if (!value.isEmpty()) {
819 out.write("=\"");
820 out.write(value);
821 out.write("\"");
822 }
823 }
824 out.write(">");
825 boolean nl = false;
826 for (Content c : content)
827 nl = c.write(out, nl);
828 if (htmlTag.endTagRequired()) {
829 out.write("</");
830 out.write(tagString);
831 out.write(">");
832 }
833 if (!isInline()) {
834 out.write(DocletConstants.NL);
835 return true;
836 } else {
837 return false;
838 }
839 }
840 }