From 846e0fa4f5aca0e75e37c421689d69bc58a2d3f6 Mon Sep 17 00:00:00 2001 From: "Matt A. Tobin" Date: Fri, 17 Apr 2020 06:36:20 -0400 Subject: Bug 1401097 - Simplify gHTMLElements and remove redundant conditions in nsXHTMLContentSerializer::LineBreakAfterClose() Tag #1375 --- parser/htmlparser/nsElementTable.cpp | 369 ++++++++++++++++------------------- 1 file changed, 166 insertions(+), 203 deletions(-) (limited to 'parser') diff --git a/parser/htmlparser/nsElementTable.cpp b/parser/htmlparser/nsElementTable.cpp index f8522c572..b7742e56f 100644 --- a/parser/htmlparser/nsElementTable.cpp +++ b/parser/htmlparser/nsElementTable.cpp @@ -6,233 +6,196 @@ #include "nsElementTable.h" -static const int kNone= 0x0; - -static const int kHTMLContent = 0x0001; // HEAD, (FRAMESET | BODY) -static const int kHeadContent = 0x0002; // Elements that *must* be in the head. -static const int kHeadMisc = 0x0004; // Elements that *can* be in the head. - -static const int kSpecial = 0x0008; // A, IMG, APPLET, OBJECT, FONT, BASEFONT, BR, SCRIPT, - // MAP, Q, SUB, SUP, SPAN, BDO, IFRAME - -static const int kFormControl = 0x0010; // INPUT SELECT TEXTAREA LABEL BUTTON -static const int kPreformatted = 0x0020; // PRE -static const int kPreExclusion = 0x0040; // IMG, OBJECT, APPLET, BIG, SMALL, SUB, SUP, FONT, BASEFONT -static const int kFontStyle = 0x0080; // TT, I, B, U, S, STRIKE, BIG, SMALL -static const int kPhrase = 0x0100; // EM, STRONG, DFN, CODE, SAMP, KBD, VAR, CITE, ABBR, ACRONYM -static const int kHeading = 0x0200; // H1..H6 -static const int kBlockMisc = 0x0400; // OBJECT, SCRIPT -static const int kBlock = 0x0800; // ADDRESS, BLOCKQUOTE, CENTER, DIV, DL, FIELDSET, FORM, - // ISINDEX, HR, NOSCRIPT, NOFRAMES, P, TABLE -static const int kList = 0x1000; // UL, OL, DIR, MENU -static const int kPCDATA = 0x2000; // plain text and entities... -static const int kSelf = 0x4000; // whatever THIS tag is... -static const int kExtensions = 0x8000; // BGSOUND, WBR, NOBR -static const int kTable = 0x10000;// TR,TD,THEAD,TBODY,TFOOT,CAPTION,TH -static const int kDLChild = 0x20000;// DL, DT -static const int kCDATA = 0x40000;// just plain text... - -static const int kInlineEntity = (kPCDATA|kFontStyle|kPhrase|kSpecial|kFormControl|kExtensions); // #PCDATA, %fontstyle, %phrase, %special, %formctrl -static const int kBlockEntity = (kHeading|kList|kPreformatted|kBlock); // %heading, %list, %preformatted, %block -static const int kFlowEntity = (kBlockEntity|kInlineEntity); // %blockentity, %inlineentity -static const int kAllTags = 0xffffff; - -// Is aTest a member of aBitset? -static bool -TestBits(int32_t aBitset, int32_t aTest) -{ - if (aTest) { - int32_t result = aBitset & aTest; - return result == aTest; - } - return false; -} - struct HTMLElement { - bool IsMemberOf(int32_t aBitset) const - { - return TestBits(aBitset, mParentBits); - } - #ifdef DEBUG nsHTMLTag mTagID; #endif - int mParentBits; // defines groups that can contain this element - bool mLeaf; + bool mIsBlock; + bool mIsContainer; }; #ifdef DEBUG -#define ELEM(tag, parent, leaf) { eHTMLTag_##tag, parent, leaf }, +#define ELEM(tag, block, container) { eHTMLTag_##tag, block, container }, #else -#define ELEM(tag, parent, leaf) { parent, leaf }, +#define ELEM(tag, block, container) { block, container }, #endif +#define ____ false // This makes the table easier to read. + +// Note that the mIsBlock field disagrees with +// https://developer.mozilla.org/en-US/docs/Web/HTML/Block-level_elements for +// the following elements: center, details, dialog, dir, dt, figcaption, +// listing, menu, multicol, noscript, output, summary, tfoot, video. +// +// mrbkap thinks that the field values were pulled from the old HTML4 DTD and +// then got modified in mostly random ways to make the old parser's behavior +// compatible with the web. So it might make sense to change the mIsBlock +// values for the abovementioned tags at some point. +// + static const HTMLElement gHTMLElements[] = { - ELEM(unknown, kNone, true) - ELEM(a, kSpecial, false) - ELEM(abbr, kPhrase, false) - ELEM(acronym, kPhrase, false) - ELEM(address, kBlock, false) - ELEM(applet, kSpecial, false) - ELEM(area, kNone, true) - ELEM(article, kBlock, false) - ELEM(aside, kBlock, false) - ELEM(audio, kSpecial, false) - ELEM(b, kFontStyle, false) - ELEM(base, kHeadContent, true) - ELEM(basefont, kSpecial, true) - ELEM(bdo, kSpecial, false) - ELEM(bgsound, (kFlowEntity|kHeadMisc), true) - ELEM(big, kFontStyle, false) - ELEM(blockquote, kBlock, false) - ELEM(body, kHTMLContent, false) - ELEM(br, kSpecial, true) - ELEM(button, kFormControl, false) - ELEM(canvas, kSpecial, false) - ELEM(caption, kNone, false) - ELEM(center, kBlock, false) - ELEM(cite, kPhrase, false) - ELEM(code, kPhrase, false) - ELEM(col, kNone, true) - ELEM(colgroup, kNone, false) - ELEM(content, kNone, false) - ELEM(data, kPhrase, false) - ELEM(datalist, kSpecial, false) - ELEM(dd, kInlineEntity, false) - ELEM(del, kFlowEntity, false) - ELEM(details, kBlock, false) - ELEM(dfn, kPhrase, false) - ELEM(dialog, kBlock, false) - ELEM(dir, kList, false) - ELEM(div, kBlock, false) - ELEM(dl, kBlock, false) - ELEM(dt, kInlineEntity, false) - ELEM(em, kPhrase, false) - ELEM(embed, kSpecial, true) - ELEM(fieldset, kBlock, false) - ELEM(figcaption, kPhrase, false) - ELEM(figure, kBlock, false) - ELEM(font, kFontStyle, false) - ELEM(footer, kBlock, false) - ELEM(form, kBlock, false) - ELEM(frame, kNone, true) - ELEM(frameset, kHTMLContent, false) - ELEM(h1, kHeading, false) - ELEM(h2, kHeading, false) - ELEM(h3, kHeading, false) - ELEM(h4, kHeading, false) - ELEM(h5, kHeading, false) - ELEM(h6, kHeading, false) - ELEM(head, kHTMLContent, false) - ELEM(header, kBlock, false) - ELEM(hgroup, kBlock, false) - ELEM(hr, kBlock, true) - ELEM(html, kNone, false) - ELEM(i, kFontStyle, false) - ELEM(iframe, kSpecial, false) - ELEM(image, kSpecial, true) - ELEM(img, kSpecial, true) - ELEM(input, kFormControl, true) - ELEM(ins, kFlowEntity, false) - ELEM(kbd, kPhrase, false) - ELEM(keygen, kFlowEntity, true) - ELEM(label, kFormControl, false) - ELEM(legend, kNone, false) - ELEM(li, kBlockEntity, false) - ELEM(link, kAllTags - kHeadContent, true) - ELEM(listing, kPreformatted, false) - ELEM(main, kBlock, false) - ELEM(map, kSpecial, false) - ELEM(mark, kSpecial, false) - ELEM(marquee, kSpecial, false) - ELEM(menu, kList, false) - ELEM(menuitem, kFlowEntity, false) - ELEM(meta, kHeadContent, true) - ELEM(meter, kFormControl, false) - ELEM(multicol, kBlock, false) - ELEM(nav, kBlock, false) - ELEM(nobr, kExtensions, false) - ELEM(noembed, kFlowEntity, false) - ELEM(noframes, kFlowEntity, false) - ELEM(noscript, kFlowEntity|kHeadMisc, false) - ELEM(object, kSpecial, false) - ELEM(ol, kList, false) - ELEM(optgroup, kNone, false) - ELEM(option, kNone, false) - ELEM(output, kSpecial, false) - ELEM(p, kBlock, false) - ELEM(param, kSpecial, true) - ELEM(picture, kSpecial, false) - ELEM(plaintext, kExtensions, false) - ELEM(pre, kBlock|kPreformatted, false) - ELEM(progress, kFormControl, false) - ELEM(q, kSpecial, false) - ELEM(rb, kPhrase, false) - ELEM(rp, kPhrase, false) - ELEM(rt, kPhrase, false) - ELEM(rtc, kPhrase, false) - ELEM(ruby, kPhrase, false) - ELEM(s, kFontStyle, false) - ELEM(samp, kPhrase, false) - ELEM(script, (kSpecial|kHeadContent), false) - ELEM(section, kBlock, false) - ELEM(select, kFormControl, false) - ELEM(small, kFontStyle, false) - ELEM(source, kSpecial, true) - ELEM(span, kSpecial, false) - ELEM(strike, kFontStyle, false) - ELEM(strong, kPhrase, false) - ELEM(style, kAllTags - kHeadContent, false) - ELEM(sub, kSpecial, false) - ELEM(summary, kBlock, false) - ELEM(sup, kSpecial, false) - ELEM(table, kBlock, false) - ELEM(tbody, kNone, false) - ELEM(td, kNone, false) - ELEM(textarea, kFormControl, false) - ELEM(tfoot, kNone, false) - ELEM(th, kNone, false) - ELEM(thead, kNone, false) - ELEM(template, kNone, false) - ELEM(time, kPhrase, false) - ELEM(title, kHeadContent, false) - ELEM(tr, kNone, false) - ELEM(track, kSpecial, true) - ELEM(tt, kFontStyle, false) - ELEM(u, kFontStyle, false) - ELEM(ul, kList, false) - ELEM(var, kPhrase, false) - ELEM(video, kSpecial, false) - ELEM(wbr, kExtensions, true) - ELEM(xmp, kInlineEntity|kPreformatted, false) - ELEM(text, kFlowEntity, true) - ELEM(whitespace, kFlowEntity|kHeadMisc, true) - ELEM(newline, kFlowEntity|kHeadMisc, true) - ELEM(comment, kFlowEntity|kHeadMisc, false) - ELEM(entity, kFlowEntity, false) - ELEM(doctypeDecl, kFlowEntity, false) - ELEM(markupDecl, kFlowEntity, false) - ELEM(instruction, kFlowEntity, false) - ELEM(userdefined, (kFlowEntity|kHeadMisc), false) + ELEM(unknown, ____, ____) + ELEM(a, ____, true) + ELEM(abbr, ____, true) + ELEM(acronym, ____, true) + ELEM(address, true, true) + ELEM(applet, ____, true) + ELEM(area, ____, ____) + ELEM(article, true, true) + ELEM(aside, true, true) + ELEM(audio, ____, true) + ELEM(b, ____, true) + ELEM(base, ____, ____) + ELEM(basefont, ____, ____) + ELEM(bdo, ____, true) + ELEM(bgsound, ____, ____) + ELEM(big, ____, true) + ELEM(blockquote, true, true) + ELEM(body, ____, true) + ELEM(br, ____, ____) + ELEM(button, ____, true) + ELEM(canvas, ____, true) + ELEM(caption, ____, true) + ELEM(center, true, true) + ELEM(cite, ____, true) + ELEM(code, ____, true) + ELEM(col, ____, ____) + ELEM(colgroup, ____, true) + ELEM(content, ____, true) + ELEM(data, ____, true) + ELEM(datalist, ____, true) + ELEM(dd, ____, true) + ELEM(del, ____, true) + ELEM(details, true, true) + ELEM(dfn, ____, true) + ELEM(dialog, true, true) + ELEM(dir, true, true) + ELEM(div, true, true) + ELEM(dl, true, true) + ELEM(dt, ____, true) + ELEM(em, ____, true) + ELEM(embed, ____, ____) + ELEM(fieldset, true, true) + ELEM(figcaption, ____, true) + ELEM(figure, true, true) + ELEM(font, ____, true) + ELEM(footer, true, true) + ELEM(form, true, true) + ELEM(frame, ____, ____) + ELEM(frameset, ____, true) + ELEM(h1, true, true) + ELEM(h2, true, true) + ELEM(h3, true, true) + ELEM(h4, true, true) + ELEM(h5, true, true) + ELEM(h6, true, true) + ELEM(head, ____, true) + ELEM(header, true, true) + ELEM(hgroup, true, true) + ELEM(hr, true, ____) + ELEM(html, ____, true) + ELEM(i, ____, true) + ELEM(iframe, ____, true) + ELEM(image, ____, ____) + ELEM(img, ____, ____) + ELEM(input, ____, ____) + ELEM(ins, ____, true) + ELEM(kbd, ____, true) + ELEM(keygen, ____, ____) + ELEM(label, ____, true) + ELEM(legend, ____, true) + ELEM(li, true, true) + ELEM(link, ____, ____) + ELEM(listing, true, true) + ELEM(main, true, true) + ELEM(map, ____, true) + ELEM(mark, ____, true) + ELEM(marquee, ____, true) + ELEM(menu, true, true) + ELEM(menuitem, ____, true) + ELEM(meta, ____, ____) + ELEM(meter, ____, true) + ELEM(multicol, true, true) + ELEM(nav, true, true) + ELEM(nobr, ____, true) + ELEM(noembed, ____, true) + ELEM(noframes, ____, true) + ELEM(noscript, ____, true) + ELEM(object, ____, true) + ELEM(ol, true, true) + ELEM(optgroup, ____, true) + ELEM(option, ____, true) + ELEM(output, ____, true) + ELEM(p, true, true) + ELEM(param, ____, ____) + ELEM(picture, ____, true) + ELEM(plaintext, ____, true) + ELEM(pre, true, true) + ELEM(progress, ____, true) + ELEM(q, ____, true) + ELEM(rb, ____, true) + ELEM(rp, ____, true) + ELEM(rt, ____, true) + ELEM(rtc, ____, true) + ELEM(ruby, ____, true) + ELEM(s, ____, true) + ELEM(samp, ____, true) + ELEM(script, ____, true) + ELEM(section, true, true) + ELEM(select, ____, true) + ELEM(small, ____, true) + ELEM(source, ____, ____) + ELEM(span, ____, true) + ELEM(strike, ____, true) + ELEM(strong, ____, true) + ELEM(style, ____, true) + ELEM(sub, ____, true) + ELEM(summary, true, true) + ELEM(sup, ____, true) + ELEM(table, true, true) + ELEM(tbody, ____, true) + ELEM(td, ____, true) + ELEM(textarea, ____, true) + ELEM(tfoot, ____, true) + ELEM(th, ____, true) + ELEM(thead, ____, true) + ELEM(template, ____, true) + ELEM(time, ____, true) + ELEM(title, ____, true) + ELEM(tr, ____, true) + ELEM(track, ____, ____) + ELEM(tt, ____, true) + ELEM(u, ____, true) + ELEM(ul, true, true) + ELEM(var, ____, true) + ELEM(video, ____, true) + ELEM(wbr, ____, ____) + ELEM(xmp, ____, true) + ELEM(text, ____, ____) + ELEM(whitespace, ____, ____) + ELEM(newline, ____, ____) + ELEM(comment, ____, true) + ELEM(entity, ____, true) + ELEM(doctypeDecl, ____, true) + ELEM(markupDecl, ____, true) + ELEM(instruction, ____, true) + ELEM(userdefined, ____, true) }; #undef ELEM +#undef ____ bool nsHTMLElement::IsContainer(nsHTMLTag aId) { - return !gHTMLElements[aId].mLeaf; + return gHTMLElements[aId].mIsContainer; } bool nsHTMLElement::IsBlock(nsHTMLTag aId) { - return gHTMLElements[aId].IsMemberOf(kBlock) || - gHTMLElements[aId].IsMemberOf(kBlockEntity) || - gHTMLElements[aId].IsMemberOf(kHeading) || - gHTMLElements[aId].IsMemberOf(kPreformatted)|| - gHTMLElements[aId].IsMemberOf(kList); + return gHTMLElements[aId].mIsBlock; } #ifdef DEBUG -- cgit v1.2.3