parser/htmlparser/nsElementTable.cpp

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #include "nsElementTable.h"
   8
   9 struct HTMLElement {
  10 #ifdef DEBUG
  11   nsHTMLTag mTagID;
  12 #endif
  13   bool mIsBlock;
  14   bool mIsContainer;
  15 };
  16
  17 #ifdef DEBUG
  18 #  define ELEM(tag, block, container) {eHTMLTag_##tag, block, container},
  19 #else
  20 #  define ELEM(tag, block, container) {block, container},
  21 #endif
  22
  23 #define ____ false  // This makes the table easier to read.
  24
  25 // Note that the mIsBlock field disagrees with
  26 // https://developer.mozilla.org/en-US/docs/Web/HTML/Block-level_elements for
  27 // the following elements: center, details, dialog, dir, dt, figcaption,
  28 // listing, menu, multicol, noscript, output, summary, tfoot, video.
  29 //
  30 // mrbkap thinks that the field values were pulled from the old HTML4 DTD and
  31 // then got modified in mostly random ways to make the old parser's behavior
  32 // compatible with the web. So it might make sense to change the mIsBlock
  33 // values for the abovementioned tags at some point.
  34 //
  35 static const HTMLElement gHTMLElements[] = {
  36     // clang-format off
  37   ELEM(unknown,     ____, ____)
  38   ELEM(a,           ____, true)
  39   ELEM(abbr,        ____, true)
  40   ELEM(acronym,     ____, true)
  41   ELEM(address,     true, true)
  42   ELEM(applet,      ____, true)
  43   ELEM(area,        ____, ____)
  44   ELEM(article,     true, true)
  45   ELEM(aside,       true, true)
  46   ELEM(audio,       ____, true)
  47   ELEM(b,           ____, true)
  48   ELEM(base,        ____, ____)
  49   ELEM(basefont,    ____, ____)
  50   ELEM(bdi,         ____, true)
  51   ELEM(bdo,         ____, true)
  52   ELEM(bgsound,     ____, ____)
  53   ELEM(big,         ____, true)
  54   ELEM(blockquote,  true, true)
  55   ELEM(body,        ____, true)
  56   ELEM(br,          ____, ____)
  57   ELEM(button,      ____, true)
  58   ELEM(canvas,      ____, true)
  59   ELEM(caption,     ____, true)
  60   ELEM(center,      true, true)
  61   ELEM(cite,        ____, true)
  62   ELEM(code,        ____, true)
  63   ELEM(col,         ____, ____)
  64   ELEM(colgroup,    ____, true)
  65   ELEM(data,        ____, true)
  66   ELEM(datalist,    ____, true)
  67   ELEM(dd,          ____, true)
  68   ELEM(del,         ____, true)
  69   ELEM(details,     true, true)
  70   ELEM(dfn,         ____, true)
  71   ELEM(dialog,      true, true)
  72   ELEM(dir,         true, true)
  73   ELEM(div,         true, true)
  74   ELEM(dl,          true, true)
  75   ELEM(dt,          ____, true)
  76   ELEM(em,          ____, true)
  77   ELEM(embed,       ____, ____)
  78   ELEM(fieldset,    true, true)
  79   ELEM(figcaption,  ____, true)
  80   ELEM(figure,      true, true)
  81   ELEM(font,        ____, true)
  82   ELEM(footer,      true, true)
  83   ELEM(form,        true, true)
  84   ELEM(frame,       ____, ____)
  85   ELEM(frameset,    ____, true)
  86   ELEM(h1,          true, true)
  87   ELEM(h2,          true, true)
  88   ELEM(h3,          true, true)
  89   ELEM(h4,          true, true)
  90   ELEM(h5,          true, true)
  91   ELEM(h6,          true, true)
  92   ELEM(head,        ____, true)
  93   ELEM(header,      true, true)
  94   ELEM(hgroup,      true, true)
  95   ELEM(hr,          true, ____)
  96   ELEM(html,        ____, true)
  97   ELEM(i,           ____, true)
  98   ELEM(iframe,      ____, true)
  99   ELEM(image,       ____, ____)
 100   ELEM(img,         ____, ____)
 101   ELEM(input,       ____, ____)
 102   ELEM(ins,         ____, true)
 103   ELEM(kbd,         ____, true)
 104   ELEM(keygen,      ____, ____)
 105   ELEM(label,       ____, true)
 106   ELEM(legend,      ____, true)
 107   ELEM(li,          true, true)
 108   ELEM(link,        ____, ____)
 109   ELEM(listing,     true, true)
 110   ELEM(main,        true, true)
 111   ELEM(map,         ____, true)
 112   ELEM(mark,        ____, true)
 113   ELEM(marquee,     ____, true)
 114   ELEM(menu,        true, true)
 115   ELEM(menuitem,    ____, true)
 116   ELEM(meta,        ____, ____)
 117   ELEM(meter,       ____, true)
 118   ELEM(multicol,    true, true)
 119   ELEM(nav,         true, true)
 120   ELEM(nobr,        ____, true)
 121   ELEM(noembed,     ____, true)
 122   ELEM(noframes,    ____, true)
 123   ELEM(noscript,    ____, true)
 124   ELEM(object,      ____, true)
 125   ELEM(ol,          true, true)
 126   ELEM(optgroup,    ____, true)
 127   ELEM(option,      ____, true)
 128   ELEM(output,      ____, true)
 129   ELEM(p,           true, true)
 130   ELEM(param,       ____, ____)
 131   ELEM(picture,     ____, true)
 132   ELEM(plaintext,   ____, true)
 133   ELEM(pre,         true, true)
 134   ELEM(progress,    ____, true)
 135   ELEM(q,           ____, true)
 136   ELEM(rb,          ____, true)
 137   ELEM(rp,          ____, true)
 138   ELEM(rt,          ____, true)
 139   ELEM(rtc,         ____, true)
 140   ELEM(ruby,        ____, true)
 141   ELEM(s,           ____, true)
 142   ELEM(samp,        ____, true)
 143   ELEM(script,      ____, true)
 144   ELEM(section,     true, true)
 145   ELEM(select,      ____, true)
 146   ELEM(small,       ____, true)
 147   ELEM(slot,        ____, true)
 148   ELEM(source,      ____, ____)
 149   ELEM(span,        ____, true)
 150   ELEM(strike,      ____, true)
 151   ELEM(strong,      ____, true)
 152   ELEM(style,       ____, true)
 153   ELEM(sub,         ____, true)
 154   ELEM(summary,     true, true)
 155   ELEM(sup,         ____, true)
 156   ELEM(table,       true, true)
 157   ELEM(tbody,       ____, true)
 158   ELEM(td,          ____, true)
 159   ELEM(textarea,    ____, true)
 160   ELEM(tfoot,       ____, true)
 161   ELEM(th,          ____, true)
 162   ELEM(thead,       ____, true)
 163   ELEM(template,    ____, true)
 164   ELEM(time,        ____, true)
 165   ELEM(title,       ____, true)
 166   ELEM(tr,          ____, true)
 167   ELEM(track,       ____, ____)
 168   ELEM(tt,          ____, true)
 169   ELEM(u,           ____, true)
 170   ELEM(ul,          true, true)
 171   ELEM(var,         ____, true)
 172   ELEM(video,       ____, true)
 173   ELEM(wbr,         ____, ____)
 174   ELEM(xmp,         ____, true)
 175   ELEM(text,        ____, ____)
 176   ELEM(whitespace,  ____, ____)
 177   ELEM(newline,     ____, ____)
 178   ELEM(comment,     ____, true)
 179   ELEM(entity,      ____, true)
 180   ELEM(doctypeDecl, ____, true)
 181   ELEM(markupDecl,  ____, true)
 182   ELEM(instruction, ____, true)
 183   ELEM(userdefined, ____, true)
 184     // clang-format on
 185 };
 186
 187 #undef ELEM
 188 #undef ____
 189
 190 bool nsHTMLElement::IsContainer(nsHTMLTag aId) {
 191   return gHTMLElements[aId].mIsContainer;
 192 }
 193
 194 bool nsHTMLElement::IsBlock(nsHTMLTag aId) {
 195   return gHTMLElements[aId].mIsBlock;
 196 }
 197
 198 #ifdef DEBUG
 199 void CheckElementTable() {
 200   for (nsHTMLTag t = eHTMLTag_unknown; t <= eHTMLTag_userdefined;
 201        t = nsHTMLTag(t + 1)) {
 202     MOZ_ASSERT(gHTMLElements[t].mTagID == t,
 203                "gHTMLElements entries does match tag list.");
 204   }
 205 }
 206 #endif