forked from mirrors/gecko-dev
5b09a02d3f
Differential Revision: https://phabricator.services.mozilla.com/D48321 --HG-- extra : moz-landing-system : lando
1926 lines
62 KiB
C++
1926 lines
62 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/*
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* nsIContentSerializer implementation that can be used with an
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* nsIDocumentEncoder to convert a DOM into plaintext in a nice way
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* (eg for copy/paste as plaintext).
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*/
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#include "nsPlainTextSerializer.h"
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#include <limits>
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#include "nsPrintfCString.h"
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#include "nsIServiceManager.h"
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#include "nsDebug.h"
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#include "nsGkAtoms.h"
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#include "nsNameSpaceManager.h"
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#include "nsTextFragment.h"
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#include "nsContentUtils.h"
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#include "nsReadableUtils.h"
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#include "nsUnicharUtils.h"
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#include "nsCRT.h"
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#include "mozilla/EditorUtils.h"
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#include "mozilla/dom/CharacterData.h"
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#include "mozilla/dom/Element.h"
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#include "mozilla/dom/HTMLBRElement.h"
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#include "mozilla/dom/Text.h"
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#include "mozilla/Preferences.h"
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#include "mozilla/BinarySearch.h"
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#include "nsComputedDOMStyle.h"
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namespace mozilla {
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class Encoding;
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}
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using namespace mozilla;
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using namespace mozilla::dom;
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#define PREF_STRUCTS "converter.html2txt.structs"
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#define PREF_HEADER_STRATEGY "converter.html2txt.header_strategy"
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#define PREF_ALWAYS_INCLUDE_RUBY "converter.html2txt.always_include_ruby"
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static const int32_t kTabSize = 4;
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static const int32_t kIndentSizeHeaders =
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2; /* Indention of h1, if
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mHeaderStrategy = kIndentIncreasedWithHeaderLevel
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or = kNumberHeadingsAndIndentSlightly. Indention of
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other headers is derived from that. */
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static const int32_t kIndentIncrementHeaders =
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2; /* If mHeaderStrategy = kIndentIncreasedWithHeaderLevel,
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indent h(x+1) this many
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columns more than h(x) */
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static const int32_t kIndentSizeList = kTabSize;
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// Indention of non-first lines of ul and ol
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static const int32_t kIndentSizeDD = kTabSize; // Indention of <dd>
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static const char16_t kNBSP = 160;
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static const char16_t kSPACE = ' ';
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constexpr int32_t kNoFlags = 0;
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static int32_t HeaderLevel(const nsAtom* aTag);
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static int32_t GetUnicharWidth(char16_t ucs);
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static int32_t GetUnicharStringWidth(const nsString& aString);
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// Someday may want to make this non-const:
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static const uint32_t TagStackSize = 500;
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static bool gPreferenceInitialized = false;
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static bool gAlwaysIncludeRuby = false;
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NS_IMPL_CYCLE_COLLECTING_ADDREF(nsPlainTextSerializer)
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NS_IMPL_CYCLE_COLLECTING_RELEASE(nsPlainTextSerializer)
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsPlainTextSerializer)
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NS_INTERFACE_MAP_ENTRY(nsIContentSerializer)
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NS_INTERFACE_MAP_ENTRY(nsISupports)
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NS_INTERFACE_MAP_END
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NS_IMPL_CYCLE_COLLECTION(nsPlainTextSerializer, mElement)
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nsresult NS_NewPlainTextSerializer(nsIContentSerializer** aSerializer) {
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RefPtr<nsPlainTextSerializer> it = new nsPlainTextSerializer();
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it.forget(aSerializer);
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return NS_OK;
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}
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// @param aFlags As defined in nsIDocumentEncoder.idl.
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static void DetermineLineBreak(const int32_t aFlags, nsAString& aLineBreak) {
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// Set the line break character:
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if ((aFlags & nsIDocumentEncoder::OutputCRLineBreak) &&
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(aFlags & nsIDocumentEncoder::OutputLFLineBreak)) {
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// Windows
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aLineBreak.AssignLiteral(u"\r\n");
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} else if (aFlags & nsIDocumentEncoder::OutputCRLineBreak) {
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// Mac
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aLineBreak.AssignLiteral(u"\r");
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} else if (aFlags & nsIDocumentEncoder::OutputLFLineBreak) {
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// Unix/DOM
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aLineBreak.AssignLiteral(u"\n");
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} else {
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// Platform/default
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aLineBreak.AssignLiteral(NS_ULINEBREAK);
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}
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}
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void nsPlainTextSerializer::CurrentLine::MaybeReplaceNbspsInContent(
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const int32_t aFlags) {
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if (!(aFlags & nsIDocumentEncoder::OutputPersistNBSP)) {
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// First, replace all nbsp characters with spaces,
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// which the unicode encoder won't do for us.
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mContent.ReplaceChar(kNBSP, kSPACE);
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}
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}
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void nsPlainTextSerializer::CurrentLine::ResetContentAndIndentationHeader() {
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mContent.Truncate();
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mIndentation.mHeader.Truncate();
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}
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int32_t nsPlainTextSerializer::CurrentLine::FindWrapIndexForContent(
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const uint32_t aWrapColumn, const uint32_t aContentWidth,
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mozilla::intl::LineBreaker* aLineBreaker) const {
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MOZ_ASSERT(aContentWidth < std::numeric_limits<int32_t>::max());
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MOZ_ASSERT(static_cast<int32_t>(aContentWidth) ==
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GetUnicharStringWidth(mContent));
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const uint32_t prefixwidth = DeterminePrefixWidth();
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int32_t goodSpace = mContent.Length();
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if (aLineBreaker) {
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// We go from the end removing one letter at a time until
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// we have a reasonable width
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uint32_t width = aContentWidth;
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while (goodSpace > 0 && (width + prefixwidth > aWrapColumn)) {
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goodSpace--;
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width -= GetUnicharWidth(mContent[goodSpace]);
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}
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goodSpace++;
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goodSpace =
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aLineBreaker->Prev(mContent.get(), mContent.Length(), goodSpace);
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if (goodSpace != NS_LINEBREAKER_NEED_MORE_TEXT &&
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nsCRT::IsAsciiSpace(mContent.CharAt(goodSpace - 1))) {
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--goodSpace; // adjust the position since line breaker returns a
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// position next to space
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}
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} else {
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// In this case we don't want strings, especially CJK-ones, to be split.
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// See
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// https://bugzilla.mozilla.org/show_bug.cgi?id=333064 for more
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// information.
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if (mContent.IsEmpty() || aWrapColumn < prefixwidth) {
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goodSpace = NS_LINEBREAKER_NEED_MORE_TEXT;
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} else {
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goodSpace = std::min(aWrapColumn - prefixwidth, mContent.Length() - 1);
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while (goodSpace >= 0 &&
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!nsCRT::IsAsciiSpace(mContent.CharAt(goodSpace))) {
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goodSpace--;
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}
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}
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}
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if (goodSpace == NS_LINEBREAKER_NEED_MORE_TEXT) {
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// If we didn't find a good place to break, accept long line and
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// try to find another place to break
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goodSpace =
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(prefixwidth > aWrapColumn + 1) ? 1 : aWrapColumn - prefixwidth + 1;
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if (aLineBreaker) {
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if ((uint32_t)goodSpace < mContent.Length())
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goodSpace =
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aLineBreaker->Next(mContent.get(), mContent.Length(), goodSpace);
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if (goodSpace == NS_LINEBREAKER_NEED_MORE_TEXT)
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goodSpace = mContent.Length();
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} else {
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// In this case we don't want strings, especially CJK-ones, to be
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// split. See
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// https://bugzilla.mozilla.org/show_bug.cgi?id=333064 for more
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// information.
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goodSpace = (prefixwidth > aWrapColumn) ? 1 : aWrapColumn - prefixwidth;
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const int32_t contentLength = mContent.Length();
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while (goodSpace < contentLength &&
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!nsCRT::IsAsciiSpace(mContent.CharAt(goodSpace))) {
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goodSpace++;
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}
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}
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}
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return goodSpace;
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}
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nsPlainTextSerializer::OutputManager::OutputManager(const int32_t aFlags,
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nsAString& aOutput)
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: mFlags{aFlags}, mOutput{aOutput}, mAtFirstColumn{true} {
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MOZ_ASSERT(aOutput.IsEmpty());
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DetermineLineBreak(mFlags, mLineBreak);
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}
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void nsPlainTextSerializer::OutputManager::Append(
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const CurrentLine& aCurrentLine,
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const StripTrailingWhitespaces aStripTrailingWhitespaces) {
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if (IsAtFirstColumn()) {
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nsAutoString quotesAndIndent;
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aCurrentLine.CreateQuotesAndIndent(quotesAndIndent);
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if ((aStripTrailingWhitespaces == StripTrailingWhitespaces::kMaybe)) {
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const bool stripTrailingSpaces = aCurrentLine.mContent.IsEmpty();
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if (stripTrailingSpaces) {
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quotesAndIndent.Trim(" ", false, true, false);
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}
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}
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Append(quotesAndIndent);
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}
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Append(aCurrentLine.mContent);
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}
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void nsPlainTextSerializer::OutputManager::Append(const nsAString& aString) {
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if (!aString.IsEmpty()) {
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mOutput.Append(aString);
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mAtFirstColumn = false;
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}
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}
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void nsPlainTextSerializer::OutputManager::AppendLineBreak() {
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mOutput.Append(mLineBreak);
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mAtFirstColumn = true;
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}
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uint32_t nsPlainTextSerializer::OutputManager::GetOutputLength() const {
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return mOutput.Length();
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}
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nsPlainTextSerializer::nsPlainTextSerializer()
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: mFloatingLines(-1),
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mLineBreakDue(false),
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kSpace(NS_LITERAL_STRING(" ")) // Init of "constant"
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{
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mHeadLevel = 0;
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mHasWrittenCiteBlockquote = false;
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mSpanLevel = 0;
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for (int32_t i = 0; i <= 6; i++) {
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mHeaderCounter[i] = 0;
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}
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// Flow
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mEmptyLines = 1; // The start of the document is an "empty line" in itself,
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mInWhitespace = false;
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mPreFormattedMail = false;
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mPreformattedBlockBoundary = false;
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// initialize the tag stack to zero:
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// The stack only ever contains pointers to static atoms, so they don't
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// need refcounting.
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mTagStack = new const nsAtom*[TagStackSize];
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mTagStackIndex = 0;
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mIgnoreAboveIndex = (uint32_t)kNotFound;
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mULCount = 0;
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mIgnoredChildNodeLevel = 0;
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if (!gPreferenceInitialized) {
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Preferences::AddBoolVarCache(&gAlwaysIncludeRuby, PREF_ALWAYS_INCLUDE_RUBY,
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true);
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gPreferenceInitialized = true;
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}
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}
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nsPlainTextSerializer::~nsPlainTextSerializer() {
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delete[] mTagStack;
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NS_WARNING_ASSERTION(mHeadLevel == 0, "Wrong head level!");
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}
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nsPlainTextSerializer::Settings::HeaderStrategy
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nsPlainTextSerializer::Settings::Convert(const int32_t aPrefHeaderStrategy) {
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HeaderStrategy result{HeaderStrategy::kIndentIncreasedWithHeaderLevel};
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switch (aPrefHeaderStrategy) {
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case 0: {
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result = HeaderStrategy::kNoIndentation;
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break;
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}
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case 1: {
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result = HeaderStrategy::kIndentIncreasedWithHeaderLevel;
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break;
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}
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case 2: {
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result = HeaderStrategy::kNumberHeadingsAndIndentSlightly;
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break;
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}
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default: {
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NS_WARNING(
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nsPrintfCString("Header strategy pref contains undefined value: %i",
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aPrefHeaderStrategy)
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.get());
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}
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}
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return result;
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}
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const int32_t kDefaultHeaderStrategy = 1;
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void nsPlainTextSerializer::Settings::Init(const int32_t aFlags,
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const uint32_t aWrapColumn) {
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mFlags = aFlags;
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if (mFlags & nsIDocumentEncoder::OutputFormatted) {
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// Get some prefs that controls how we do formatted output
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mStructs = Preferences::GetBool(PREF_STRUCTS, mStructs);
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int32_t headerStrategy =
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Preferences::GetInt(PREF_HEADER_STRATEGY, kDefaultHeaderStrategy);
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mHeaderStrategy = Convert(headerStrategy);
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}
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// The pref is default inited to false in libpref, but we use true
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// as fallback value because we don't want to affect behavior in
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// other places which use this serializer currently.
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mWithRubyAnnotation =
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gAlwaysIncludeRuby || (mFlags & nsIDocumentEncoder::OutputRubyAnnotation);
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// XXX We should let the caller decide whether to do this or not
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mFlags &= ~nsIDocumentEncoder::OutputNoFramesContent;
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mWrapColumn = aWrapColumn;
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}
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NS_IMETHODIMP
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nsPlainTextSerializer::Init(const uint32_t aFlags, uint32_t aWrapColumn,
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const Encoding* aEncoding, bool aIsCopying,
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bool aIsWholeDocument,
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bool* aNeedsPreformatScanning, nsAString& aOutput) {
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#ifdef DEBUG
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// Check if the major control flags are set correctly.
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if (aFlags & nsIDocumentEncoder::OutputFormatFlowed) {
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NS_ASSERTION(aFlags & nsIDocumentEncoder::OutputFormatted,
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"If you want format=flowed, you must combine it with "
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"nsIDocumentEncoder::OutputFormatted");
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}
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if (aFlags & nsIDocumentEncoder::OutputFormatted) {
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NS_ASSERTION(
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!(aFlags & nsIDocumentEncoder::OutputPreformatted),
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"Can't do formatted and preformatted output at the same time!");
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}
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#endif
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MOZ_ASSERT(!(aFlags & nsIDocumentEncoder::OutputFormatDelSp) ||
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(aFlags & nsIDocumentEncoder::OutputFormatFlowed));
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*aNeedsPreformatScanning = true;
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mSettings.Init(aFlags, aWrapColumn);
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mOutputManager.emplace(mSettings.GetFlags(), aOutput);
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if (mSettings.MayWrap() && mSettings.MayBreakLines()) {
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mLineBreaker = nsContentUtils::LineBreaker();
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}
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mLineBreakDue = false;
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mFloatingLines = -1;
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mPreformattedBlockBoundary = false;
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MOZ_ASSERT(mOLStack.IsEmpty());
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return NS_OK;
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}
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bool nsPlainTextSerializer::GetLastBool(const nsTArray<bool>& aStack) {
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uint32_t size = aStack.Length();
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if (size == 0) {
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return false;
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}
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return aStack.ElementAt(size - 1);
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}
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void nsPlainTextSerializer::SetLastBool(nsTArray<bool>& aStack, bool aValue) {
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uint32_t size = aStack.Length();
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if (size > 0) {
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aStack.ElementAt(size - 1) = aValue;
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} else {
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NS_ERROR("There is no \"Last\" value");
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}
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}
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void nsPlainTextSerializer::PushBool(nsTArray<bool>& aStack, bool aValue) {
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aStack.AppendElement(bool(aValue));
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}
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bool nsPlainTextSerializer::PopBool(nsTArray<bool>& aStack) {
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bool returnValue = false;
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uint32_t size = aStack.Length();
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if (size > 0) {
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returnValue = aStack.ElementAt(size - 1);
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aStack.RemoveElementAt(size - 1);
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}
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return returnValue;
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}
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bool nsPlainTextSerializer::IsIgnorableRubyAnnotation(
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const nsAtom* aTag) const {
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if (mSettings.GetWithRubyAnnotation()) {
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return false;
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}
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return aTag == nsGkAtoms::rp || aTag == nsGkAtoms::rt ||
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aTag == nsGkAtoms::rtc;
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}
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// Return true if aElement has 'display:none' or if we just don't know.
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static bool IsDisplayNone(Element* aElement) {
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RefPtr<ComputedStyle> computedStyle =
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nsComputedDOMStyle::GetComputedStyleNoFlush(aElement, nullptr);
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return !computedStyle ||
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computedStyle->StyleDisplay()->mDisplay == StyleDisplay::None;
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}
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static bool IsIgnorableScriptOrStyle(Element* aElement) {
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return aElement->IsAnyOfHTMLElements(nsGkAtoms::script, nsGkAtoms::style) &&
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IsDisplayNone(aElement);
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}
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NS_IMETHODIMP
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nsPlainTextSerializer::AppendText(nsIContent* aText, int32_t aStartOffset,
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int32_t aEndOffset) {
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if (mIgnoreAboveIndex != (uint32_t)kNotFound) {
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return NS_OK;
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}
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NS_ASSERTION(aStartOffset >= 0, "Negative start offset for text fragment!");
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if (aStartOffset < 0) return NS_ERROR_INVALID_ARG;
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NS_ENSURE_ARG(aText);
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nsresult rv = NS_OK;
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nsIContent* content = aText;
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const nsTextFragment* frag;
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if (!content || !(frag = content->GetText())) {
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return NS_ERROR_FAILURE;
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}
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int32_t fragLength = frag->GetLength();
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int32_t endoffset =
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(aEndOffset == -1) ? fragLength : std::min(aEndOffset, fragLength);
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NS_ASSERTION(aStartOffset <= endoffset,
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"A start offset is beyond the end of the text fragment!");
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int32_t length = endoffset - aStartOffset;
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if (length <= 0) {
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return NS_OK;
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}
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nsAutoString textstr;
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if (frag->Is2b()) {
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textstr.Assign(frag->Get2b() + aStartOffset, length);
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} else {
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// AssignASCII is for 7-bit character only, so don't use it
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const char* data = frag->Get1b();
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CopyASCIItoUTF16(Substring(data + aStartOffset, data + endoffset), textstr);
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}
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// Mask the text if the text node is in a password field.
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if (content->HasFlag(NS_MAYBE_MASKED)) {
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EditorUtils::MaskString(textstr, content->AsText(), 0, aStartOffset);
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}
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// We have to split the string across newlines
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// to match parser behavior
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int32_t start = 0;
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int32_t offset = textstr.FindCharInSet("\n\r");
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while (offset != kNotFound) {
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if (offset > start) {
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// Pass in the line
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DoAddText(false, Substring(textstr, start, offset - start));
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}
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// Pass in a newline
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DoAddText();
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start = offset + 1;
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offset = textstr.FindCharInSet("\n\r", start);
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}
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// Consume the last bit of the string if there's any left
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if (start < length) {
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if (start) {
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DoAddText(false, Substring(textstr, start, length - start));
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} else {
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DoAddText(false, textstr);
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|
}
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsPlainTextSerializer::AppendCDATASection(nsIContent* aCDATASection,
|
|
int32_t aStartOffset,
|
|
int32_t aEndOffset) {
|
|
return AppendText(aCDATASection, aStartOffset, aEndOffset);
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsPlainTextSerializer::ScanElementForPreformat(Element* aElement) {
|
|
mPreformatStack.push(IsElementPreformatted(aElement));
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsPlainTextSerializer::ForgetElementForPreformat(Element* aElement) {
|
|
MOZ_RELEASE_ASSERT(!mPreformatStack.empty(),
|
|
"Tried to pop without previous push.");
|
|
mPreformatStack.pop();
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsPlainTextSerializer::AppendElementStart(Element* aElement,
|
|
Element* aOriginalElement) {
|
|
NS_ENSURE_ARG(aElement);
|
|
|
|
mElement = aElement;
|
|
|
|
nsresult rv;
|
|
nsAtom* id = GetIdForContent(mElement);
|
|
|
|
bool isContainer = !FragmentOrElement::IsHTMLVoid(id);
|
|
|
|
if (isContainer) {
|
|
rv = DoOpenContainer(id);
|
|
} else {
|
|
rv = DoAddLeaf(id);
|
|
}
|
|
|
|
mElement = nullptr;
|
|
|
|
if (id == nsGkAtoms::head) {
|
|
++mHeadLevel;
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsPlainTextSerializer::AppendElementEnd(Element* aElement,
|
|
Element* aOriginalElement) {
|
|
NS_ENSURE_ARG(aElement);
|
|
|
|
mElement = aElement;
|
|
|
|
nsresult rv;
|
|
nsAtom* id = GetIdForContent(mElement);
|
|
|
|
bool isContainer = !FragmentOrElement::IsHTMLVoid(id);
|
|
|
|
rv = NS_OK;
|
|
if (isContainer) {
|
|
rv = DoCloseContainer(id);
|
|
}
|
|
|
|
mElement = nullptr;
|
|
|
|
if (id == nsGkAtoms::head) {
|
|
NS_ASSERTION(mHeadLevel != 0, "mHeadLevel being decremented below 0");
|
|
--mHeadLevel;
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsPlainTextSerializer::FlushAndFinish() {
|
|
MOZ_ASSERT(mOutputManager);
|
|
|
|
mOutputManager->Flush(mCurrentLine);
|
|
return Finish();
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsPlainTextSerializer::Finish() {
|
|
mOutputManager.reset();
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsPlainTextSerializer::GetOutputLength(uint32_t& aLength) const {
|
|
MOZ_ASSERT(mOutputManager);
|
|
|
|
aLength = mOutputManager->GetOutputLength();
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsPlainTextSerializer::AppendDocumentStart(Document* aDocument) {
|
|
return NS_OK;
|
|
}
|
|
|
|
constexpr int32_t kOlStackDummyValue = 0;
|
|
|
|
nsresult nsPlainTextSerializer::DoOpenContainer(const nsAtom* aTag) {
|
|
if (IsIgnorableRubyAnnotation(aTag)) {
|
|
// Ignorable ruby annotation shouldn't be replaced by a placeholder
|
|
// character, neither any of its descendants.
|
|
mIgnoredChildNodeLevel++;
|
|
return NS_OK;
|
|
}
|
|
if (IsIgnorableScriptOrStyle(mElement)) {
|
|
mIgnoredChildNodeLevel++;
|
|
return NS_OK;
|
|
}
|
|
|
|
if (mSettings.HasFlag(nsIDocumentEncoder::OutputForPlainTextClipboardCopy)) {
|
|
if (mPreformattedBlockBoundary && DoOutput()) {
|
|
// Should always end a line, but get no more whitespace
|
|
if (mFloatingLines < 0) mFloatingLines = 0;
|
|
mLineBreakDue = true;
|
|
}
|
|
mPreformattedBlockBoundary = false;
|
|
}
|
|
|
|
if (mSettings.HasFlag(nsIDocumentEncoder::OutputRaw)) {
|
|
// Raw means raw. Don't even think about doing anything fancy
|
|
// here like indenting, adding line breaks or any other
|
|
// characters such as list item bullets, quote characters
|
|
// around <q>, etc.
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
if (mTagStackIndex < TagStackSize) {
|
|
mTagStack[mTagStackIndex++] = aTag;
|
|
}
|
|
|
|
if (mIgnoreAboveIndex != (uint32_t)kNotFound) {
|
|
return NS_OK;
|
|
}
|
|
|
|
// Reset this so that <blockquote type=cite> doesn't affect the whitespace
|
|
// above random <pre>s below it.
|
|
mHasWrittenCiteBlockquote =
|
|
mHasWrittenCiteBlockquote && aTag == nsGkAtoms::pre;
|
|
|
|
bool isInCiteBlockquote = false;
|
|
|
|
// XXX special-case <blockquote type=cite> so that we don't add additional
|
|
// newlines before the text.
|
|
if (aTag == nsGkAtoms::blockquote) {
|
|
nsAutoString value;
|
|
nsresult rv = GetAttributeValue(nsGkAtoms::type, value);
|
|
isInCiteBlockquote = NS_SUCCEEDED(rv) && value.EqualsIgnoreCase("cite");
|
|
}
|
|
|
|
if (mLineBreakDue && !isInCiteBlockquote) EnsureVerticalSpace(mFloatingLines);
|
|
|
|
// Check if this tag's content that should not be output
|
|
if ((aTag == nsGkAtoms::noscript &&
|
|
!mSettings.HasFlag(nsIDocumentEncoder::OutputNoScriptContent)) ||
|
|
((aTag == nsGkAtoms::iframe || aTag == nsGkAtoms::noframes) &&
|
|
!mSettings.HasFlag(nsIDocumentEncoder::OutputNoFramesContent))) {
|
|
// Ignore everything that follows the current tag in
|
|
// question until a matching end tag is encountered.
|
|
mIgnoreAboveIndex = mTagStackIndex - 1;
|
|
return NS_OK;
|
|
}
|
|
|
|
if (aTag == nsGkAtoms::body) {
|
|
// Try to figure out here whether we have a
|
|
// preformatted style attribute set by Thunderbird.
|
|
//
|
|
// Trigger on the presence of a "pre-wrap" in the
|
|
// style attribute. That's a very simplistic way to do
|
|
// it, but better than nothing.
|
|
nsAutoString style;
|
|
int32_t whitespace;
|
|
if (NS_SUCCEEDED(GetAttributeValue(nsGkAtoms::style, style)) &&
|
|
(kNotFound != (whitespace = style.Find("white-space:")))) {
|
|
if (kNotFound != style.Find("pre-wrap", true, whitespace)) {
|
|
#ifdef DEBUG_preformatted
|
|
printf("Set mPreFormattedMail based on style pre-wrap\n");
|
|
#endif
|
|
mPreFormattedMail = true;
|
|
} else if (kNotFound != style.Find("pre", true, whitespace)) {
|
|
#ifdef DEBUG_preformatted
|
|
printf("Set mPreFormattedMail based on style pre\n");
|
|
#endif
|
|
mPreFormattedMail = true;
|
|
}
|
|
} else {
|
|
/* See comment at end of function. */
|
|
mInWhitespace = true;
|
|
mPreFormattedMail = false;
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
// Keep this in sync with DoCloseContainer!
|
|
if (!DoOutput()) {
|
|
return NS_OK;
|
|
}
|
|
|
|
if (aTag == nsGkAtoms::p)
|
|
EnsureVerticalSpace(1);
|
|
else if (aTag == nsGkAtoms::pre) {
|
|
if (GetLastBool(mIsInCiteBlockquote))
|
|
EnsureVerticalSpace(0);
|
|
else if (mHasWrittenCiteBlockquote) {
|
|
EnsureVerticalSpace(0);
|
|
mHasWrittenCiteBlockquote = false;
|
|
} else
|
|
EnsureVerticalSpace(1);
|
|
} else if (aTag == nsGkAtoms::tr) {
|
|
PushBool(mHasWrittenCellsForRow, false);
|
|
} else if (aTag == nsGkAtoms::td || aTag == nsGkAtoms::th) {
|
|
// We must make sure that the content of two table cells get a
|
|
// space between them.
|
|
|
|
// To make the separation between cells most obvious and
|
|
// importable, we use a TAB.
|
|
if (mHasWrittenCellsForRow.IsEmpty()) {
|
|
// We don't always see a <tr> (nor a <table>) before the <td> if we're
|
|
// copying part of a table
|
|
PushBool(mHasWrittenCellsForRow, true); // will never be popped
|
|
} else if (GetLastBool(mHasWrittenCellsForRow)) {
|
|
// Bypass |Write| so that the TAB isn't compressed away.
|
|
AddToLine(u"\t", 1);
|
|
mInWhitespace = true;
|
|
} else {
|
|
SetLastBool(mHasWrittenCellsForRow, true);
|
|
}
|
|
} else if (aTag == nsGkAtoms::ul) {
|
|
// Indent here to support nested lists, which aren't included in li :-(
|
|
EnsureVerticalSpace(IsInOlOrUl() ? 0 : 1);
|
|
// Must end the current line before we change indention
|
|
mCurrentLine.mIndentation.mLength += kIndentSizeList;
|
|
mULCount++;
|
|
} else if (aTag == nsGkAtoms::ol) {
|
|
EnsureVerticalSpace(IsInOlOrUl() ? 0 : 1);
|
|
if (mSettings.HasFlag(nsIDocumentEncoder::OutputFormatted)) {
|
|
// Must end the current line before we change indention
|
|
nsAutoString startAttr;
|
|
int32_t startVal = 1;
|
|
if (NS_SUCCEEDED(GetAttributeValue(nsGkAtoms::start, startAttr))) {
|
|
nsresult rv = NS_OK;
|
|
startVal = startAttr.ToInteger(&rv);
|
|
if (NS_FAILED(rv)) {
|
|
startVal = 1;
|
|
}
|
|
}
|
|
mOLStack.AppendElement(startVal);
|
|
} else {
|
|
mOLStack.AppendElement(kOlStackDummyValue);
|
|
}
|
|
mCurrentLine.mIndentation.mLength += kIndentSizeList; // see ul
|
|
} else if (aTag == nsGkAtoms::li &&
|
|
mSettings.HasFlag(nsIDocumentEncoder::OutputFormatted)) {
|
|
if (mTagStackIndex > 1 && IsInOL()) {
|
|
if (!mOLStack.IsEmpty()) {
|
|
nsAutoString valueAttr;
|
|
if (NS_SUCCEEDED(GetAttributeValue(nsGkAtoms::value, valueAttr))) {
|
|
nsresult rv = NS_OK;
|
|
int32_t valueAttrVal = valueAttr.ToInteger(&rv);
|
|
if (NS_SUCCEEDED(rv)) {
|
|
mOLStack.LastElement() = valueAttrVal;
|
|
}
|
|
}
|
|
// This is what nsBulletFrame does for OLs:
|
|
mCurrentLine.mIndentation.mHeader.AppendInt(mOLStack.LastElement(), 10);
|
|
mOLStack.LastElement()++;
|
|
} else {
|
|
mCurrentLine.mIndentation.mHeader.Append(char16_t('#'));
|
|
}
|
|
|
|
mCurrentLine.mIndentation.mHeader.Append(char16_t('.'));
|
|
|
|
} else {
|
|
static const char bulletCharArray[] = "*o+#";
|
|
uint32_t index = mULCount > 0 ? (mULCount - 1) : 3;
|
|
char bulletChar = bulletCharArray[index % 4];
|
|
mCurrentLine.mIndentation.mHeader.Append(char16_t(bulletChar));
|
|
}
|
|
|
|
mCurrentLine.mIndentation.mHeader.Append(char16_t(' '));
|
|
} else if (aTag == nsGkAtoms::dl) {
|
|
EnsureVerticalSpace(1);
|
|
} else if (aTag == nsGkAtoms::dt) {
|
|
EnsureVerticalSpace(0);
|
|
} else if (aTag == nsGkAtoms::dd) {
|
|
EnsureVerticalSpace(0);
|
|
mCurrentLine.mIndentation.mLength += kIndentSizeDD;
|
|
} else if (aTag == nsGkAtoms::span) {
|
|
++mSpanLevel;
|
|
} else if (aTag == nsGkAtoms::blockquote) {
|
|
// Push
|
|
PushBool(mIsInCiteBlockquote, isInCiteBlockquote);
|
|
if (isInCiteBlockquote) {
|
|
EnsureVerticalSpace(0);
|
|
mCurrentLine.mCiteQuoteLevel++;
|
|
} else {
|
|
EnsureVerticalSpace(1);
|
|
mCurrentLine.mIndentation.mLength +=
|
|
kTabSize; // Check for some maximum value?
|
|
}
|
|
} else if (aTag == nsGkAtoms::q) {
|
|
Write(NS_LITERAL_STRING("\""));
|
|
}
|
|
|
|
// Else make sure we'll separate block level tags,
|
|
// even if we're about to leave, before doing any other formatting.
|
|
else if (IsCssBlockLevelElement(mElement)) {
|
|
EnsureVerticalSpace(0);
|
|
}
|
|
|
|
if (mSettings.HasFlag(nsIDocumentEncoder::OutputFormatted)) {
|
|
OpenContainerForOutputFormatted(aTag);
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
void nsPlainTextSerializer::OpenContainerForOutputFormatted(
|
|
const nsAtom* aTag) {
|
|
const bool currentNodeIsConverted = IsCurrentNodeConverted();
|
|
|
|
if (aTag == nsGkAtoms::h1 || aTag == nsGkAtoms::h2 || aTag == nsGkAtoms::h3 ||
|
|
aTag == nsGkAtoms::h4 || aTag == nsGkAtoms::h5 || aTag == nsGkAtoms::h6) {
|
|
EnsureVerticalSpace(2);
|
|
if (mSettings.GetHeaderStrategy() ==
|
|
Settings::HeaderStrategy::kNumberHeadingsAndIndentSlightly) {
|
|
mCurrentLine.mIndentation.mLength += kIndentSizeHeaders;
|
|
// Caching
|
|
int32_t level = HeaderLevel(aTag);
|
|
// Increase counter for current level
|
|
mHeaderCounter[level]++;
|
|
// Reset all lower levels
|
|
int32_t i;
|
|
|
|
for (i = level + 1; i <= 6; i++) {
|
|
mHeaderCounter[i] = 0;
|
|
}
|
|
|
|
// Construct numbers
|
|
nsAutoString leadup;
|
|
for (i = 1; i <= level; i++) {
|
|
leadup.AppendInt(mHeaderCounter[i]);
|
|
leadup.Append(char16_t('.'));
|
|
}
|
|
leadup.Append(char16_t(' '));
|
|
Write(leadup);
|
|
} else if (mSettings.GetHeaderStrategy() ==
|
|
Settings::HeaderStrategy::kIndentIncreasedWithHeaderLevel) {
|
|
mCurrentLine.mIndentation.mLength += kIndentSizeHeaders;
|
|
for (int32_t i = HeaderLevel(aTag); i > 1; i--) {
|
|
// for h(x), run x-1 times
|
|
mCurrentLine.mIndentation.mLength += kIndentIncrementHeaders;
|
|
}
|
|
}
|
|
} else if (aTag == nsGkAtoms::sup && mSettings.GetStructs() &&
|
|
!currentNodeIsConverted) {
|
|
Write(NS_LITERAL_STRING("^"));
|
|
} else if (aTag == nsGkAtoms::sub && mSettings.GetStructs() &&
|
|
!currentNodeIsConverted) {
|
|
Write(NS_LITERAL_STRING("_"));
|
|
} else if (aTag == nsGkAtoms::code && mSettings.GetStructs() &&
|
|
!currentNodeIsConverted) {
|
|
Write(NS_LITERAL_STRING("|"));
|
|
} else if ((aTag == nsGkAtoms::strong || aTag == nsGkAtoms::b) &&
|
|
mSettings.GetStructs() && !currentNodeIsConverted) {
|
|
Write(NS_LITERAL_STRING("*"));
|
|
} else if ((aTag == nsGkAtoms::em || aTag == nsGkAtoms::i) &&
|
|
mSettings.GetStructs() && !currentNodeIsConverted) {
|
|
Write(NS_LITERAL_STRING("/"));
|
|
} else if (aTag == nsGkAtoms::u && mSettings.GetStructs() &&
|
|
!currentNodeIsConverted) {
|
|
Write(NS_LITERAL_STRING("_"));
|
|
}
|
|
|
|
/* Container elements are always block elements, so we shouldn't
|
|
output any whitespace immediately after the container tag even if
|
|
there's extra whitespace there because the HTML is pretty-printed
|
|
or something. To ensure that happens, tell the serializer we're
|
|
already in whitespace so it won't output more. */
|
|
mInWhitespace = true;
|
|
}
|
|
|
|
nsresult nsPlainTextSerializer::DoCloseContainer(const nsAtom* aTag) {
|
|
if (IsIgnorableRubyAnnotation(aTag)) {
|
|
mIgnoredChildNodeLevel--;
|
|
return NS_OK;
|
|
}
|
|
if (IsIgnorableScriptOrStyle(mElement)) {
|
|
mIgnoredChildNodeLevel--;
|
|
return NS_OK;
|
|
}
|
|
|
|
if (mSettings.HasFlag(nsIDocumentEncoder::OutputForPlainTextClipboardCopy)) {
|
|
if (DoOutput() && IsElementPreformatted() &&
|
|
IsCssBlockLevelElement(mElement)) {
|
|
// If we're closing a preformatted block element, output a line break
|
|
// when we find a new container.
|
|
mPreformattedBlockBoundary = true;
|
|
}
|
|
}
|
|
|
|
if (mSettings.HasFlag(nsIDocumentEncoder::OutputRaw)) {
|
|
// Raw means raw. Don't even think about doing anything fancy
|
|
// here like indenting, adding line breaks or any other
|
|
// characters such as list item bullets, quote characters
|
|
// around <q>, etc.
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
if (mTagStackIndex > 0) {
|
|
--mTagStackIndex;
|
|
}
|
|
|
|
if (mTagStackIndex >= mIgnoreAboveIndex) {
|
|
if (mTagStackIndex == mIgnoreAboveIndex) {
|
|
// We're dealing with the close tag whose matching
|
|
// open tag had set the mIgnoreAboveIndex value.
|
|
// Reset mIgnoreAboveIndex before discarding this tag.
|
|
mIgnoreAboveIndex = (uint32_t)kNotFound;
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
MOZ_ASSERT(mOutputManager);
|
|
|
|
// End current line if we're ending a block level tag
|
|
if ((aTag == nsGkAtoms::body) || (aTag == nsGkAtoms::html)) {
|
|
// We want the output to end with a new line,
|
|
// but in preformatted areas like text fields,
|
|
// we can't emit newlines that weren't there.
|
|
// So add the newline only in the case of formatted output.
|
|
if (mSettings.HasFlag(nsIDocumentEncoder::OutputFormatted)) {
|
|
EnsureVerticalSpace(0);
|
|
} else {
|
|
mOutputManager->Flush(mCurrentLine);
|
|
}
|
|
// We won't want to do anything with these in formatted mode either,
|
|
// so just return now:
|
|
return NS_OK;
|
|
}
|
|
|
|
// Keep this in sync with DoOpenContainer!
|
|
if (!DoOutput()) {
|
|
return NS_OK;
|
|
}
|
|
|
|
if (aTag == nsGkAtoms::tr) {
|
|
PopBool(mHasWrittenCellsForRow);
|
|
// Should always end a line, but get no more whitespace
|
|
if (mFloatingLines < 0) mFloatingLines = 0;
|
|
mLineBreakDue = true;
|
|
} else if (((aTag == nsGkAtoms::li) || (aTag == nsGkAtoms::dt)) &&
|
|
mSettings.HasFlag(nsIDocumentEncoder::OutputFormatted)) {
|
|
// Items that should always end a line, but get no more whitespace
|
|
if (mFloatingLines < 0) mFloatingLines = 0;
|
|
mLineBreakDue = true;
|
|
} else if (aTag == nsGkAtoms::pre) {
|
|
mFloatingLines = GetLastBool(mIsInCiteBlockquote) ? 0 : 1;
|
|
mLineBreakDue = true;
|
|
} else if (aTag == nsGkAtoms::ul) {
|
|
mOutputManager->Flush(mCurrentLine);
|
|
mCurrentLine.mIndentation.mLength -= kIndentSizeList;
|
|
--mULCount;
|
|
if (!IsInOlOrUl()) {
|
|
mFloatingLines = 1;
|
|
mLineBreakDue = true;
|
|
}
|
|
} else if (aTag == nsGkAtoms::ol) {
|
|
mOutputManager->Flush(mCurrentLine); // Doing this after decreasing
|
|
// OLStackIndex would be wrong.
|
|
mCurrentLine.mIndentation.mLength -= kIndentSizeList;
|
|
MOZ_ASSERT(!mOLStack.IsEmpty(), "Wrong OLStack level!");
|
|
mOLStack.RemoveLastElement();
|
|
if (!IsInOlOrUl()) {
|
|
mFloatingLines = 1;
|
|
mLineBreakDue = true;
|
|
}
|
|
} else if (aTag == nsGkAtoms::dl) {
|
|
mFloatingLines = 1;
|
|
mLineBreakDue = true;
|
|
} else if (aTag == nsGkAtoms::dd) {
|
|
mOutputManager->Flush(mCurrentLine);
|
|
mCurrentLine.mIndentation.mLength -= kIndentSizeDD;
|
|
} else if (aTag == nsGkAtoms::span) {
|
|
NS_ASSERTION(mSpanLevel, "Span level will be negative!");
|
|
--mSpanLevel;
|
|
} else if (aTag == nsGkAtoms::div) {
|
|
if (mFloatingLines < 0) mFloatingLines = 0;
|
|
mLineBreakDue = true;
|
|
} else if (aTag == nsGkAtoms::blockquote) {
|
|
mOutputManager->Flush(mCurrentLine); // Is this needed?
|
|
|
|
// Pop
|
|
bool isInCiteBlockquote = PopBool(mIsInCiteBlockquote);
|
|
|
|
if (isInCiteBlockquote) {
|
|
NS_ASSERTION(mCurrentLine.mCiteQuoteLevel,
|
|
"CiteQuote level will be negative!");
|
|
mCurrentLine.mCiteQuoteLevel--;
|
|
mFloatingLines = 0;
|
|
mHasWrittenCiteBlockquote = true;
|
|
} else {
|
|
mCurrentLine.mIndentation.mLength -= kTabSize;
|
|
mFloatingLines = 1;
|
|
}
|
|
mLineBreakDue = true;
|
|
} else if (aTag == nsGkAtoms::q) {
|
|
Write(NS_LITERAL_STRING("\""));
|
|
} else if (IsCssBlockLevelElement(mElement)) {
|
|
// All other blocks get 1 vertical space after them
|
|
// in formatted mode, otherwise 0.
|
|
// This is hard. Sometimes 0 is a better number, but
|
|
// how to know?
|
|
if (mSettings.HasFlag(nsIDocumentEncoder::OutputFormatted)) {
|
|
EnsureVerticalSpace(1);
|
|
} else {
|
|
if (mFloatingLines < 0) mFloatingLines = 0;
|
|
mLineBreakDue = true;
|
|
}
|
|
}
|
|
|
|
if (mSettings.HasFlag(nsIDocumentEncoder::OutputFormatted)) {
|
|
CloseContainerForOutputFormatted(aTag);
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
void nsPlainTextSerializer::CloseContainerForOutputFormatted(
|
|
const nsAtom* aTag) {
|
|
const bool currentNodeIsConverted = IsCurrentNodeConverted();
|
|
|
|
if (aTag == nsGkAtoms::h1 || aTag == nsGkAtoms::h2 || aTag == nsGkAtoms::h3 ||
|
|
aTag == nsGkAtoms::h4 || aTag == nsGkAtoms::h5 || aTag == nsGkAtoms::h6) {
|
|
using HeaderStrategy = Settings::HeaderStrategy;
|
|
if ((mSettings.GetHeaderStrategy() ==
|
|
HeaderStrategy::kIndentIncreasedWithHeaderLevel) ||
|
|
(mSettings.GetHeaderStrategy() ==
|
|
HeaderStrategy::kNumberHeadingsAndIndentSlightly)) {
|
|
mCurrentLine.mIndentation.mLength -= kIndentSizeHeaders;
|
|
}
|
|
if (mSettings.GetHeaderStrategy() ==
|
|
HeaderStrategy::kIndentIncreasedWithHeaderLevel) {
|
|
for (int32_t i = HeaderLevel(aTag); i > 1; i--) {
|
|
// for h(x), run x-1 times
|
|
mCurrentLine.mIndentation.mLength -= kIndentIncrementHeaders;
|
|
}
|
|
}
|
|
EnsureVerticalSpace(1);
|
|
} else if (aTag == nsGkAtoms::a && !currentNodeIsConverted) {
|
|
nsAutoString url;
|
|
if (NS_SUCCEEDED(GetAttributeValue(nsGkAtoms::href, url)) &&
|
|
!url.IsEmpty()) {
|
|
nsAutoString temp;
|
|
temp.AssignLiteral(" <");
|
|
temp += url;
|
|
temp.Append(char16_t('>'));
|
|
Write(temp);
|
|
}
|
|
} else if ((aTag == nsGkAtoms::sup || aTag == nsGkAtoms::sub) &&
|
|
mSettings.GetStructs() && !currentNodeIsConverted) {
|
|
Write(kSpace);
|
|
} else if (aTag == nsGkAtoms::code && mSettings.GetStructs() &&
|
|
!currentNodeIsConverted) {
|
|
Write(NS_LITERAL_STRING("|"));
|
|
} else if ((aTag == nsGkAtoms::strong || aTag == nsGkAtoms::b) &&
|
|
mSettings.GetStructs() && !currentNodeIsConverted) {
|
|
Write(NS_LITERAL_STRING("*"));
|
|
} else if ((aTag == nsGkAtoms::em || aTag == nsGkAtoms::i) &&
|
|
mSettings.GetStructs() && !currentNodeIsConverted) {
|
|
Write(NS_LITERAL_STRING("/"));
|
|
} else if (aTag == nsGkAtoms::u && mSettings.GetStructs() &&
|
|
!currentNodeIsConverted) {
|
|
Write(NS_LITERAL_STRING("_"));
|
|
}
|
|
}
|
|
|
|
bool nsPlainTextSerializer::MustSuppressLeaf() const {
|
|
if (mIgnoredChildNodeLevel > 0) {
|
|
return true;
|
|
}
|
|
|
|
if ((mTagStackIndex > 1 &&
|
|
mTagStack[mTagStackIndex - 2] == nsGkAtoms::select) ||
|
|
(mTagStackIndex > 0 &&
|
|
mTagStack[mTagStackIndex - 1] == nsGkAtoms::select)) {
|
|
// Don't output the contents of SELECT elements;
|
|
// Might be nice, eventually, to output just the selected element.
|
|
// Read more in bug 31994.
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
void nsPlainTextSerializer::DoAddText() { DoAddText(true, EmptyString()); }
|
|
|
|
void nsPlainTextSerializer::DoAddText(bool aIsLineBreak,
|
|
const nsAString& aText) {
|
|
// If we don't want any output, just return
|
|
if (!DoOutput()) {
|
|
return;
|
|
}
|
|
|
|
if (!aIsLineBreak) {
|
|
// Make sure to reset this, since it's no longer true.
|
|
mHasWrittenCiteBlockquote = false;
|
|
}
|
|
|
|
if (mLineBreakDue) EnsureVerticalSpace(mFloatingLines);
|
|
|
|
if (MustSuppressLeaf()) {
|
|
return;
|
|
}
|
|
|
|
if (aIsLineBreak) {
|
|
// The only times we want to pass along whitespace from the original
|
|
// html source are if we're forced into preformatted mode via flags,
|
|
// or if we're prettyprinting and we're inside a <pre>.
|
|
// Otherwise, either we're collapsing to minimal text, or we're
|
|
// prettyprinting to mimic the html format, and in neither case
|
|
// does the formatting of the html source help us.
|
|
if (mSettings.HasFlag(nsIDocumentEncoder::OutputPreformatted) ||
|
|
(mPreFormattedMail && !mSettings.GetWrapColumn()) ||
|
|
IsElementPreformatted()) {
|
|
EnsureVerticalSpace(mEmptyLines + 1);
|
|
} else if (!mInWhitespace) {
|
|
Write(kSpace);
|
|
mInWhitespace = true;
|
|
}
|
|
return;
|
|
}
|
|
|
|
Write(aText);
|
|
}
|
|
|
|
void CreateLineOfDashes(nsAString& aResult, const uint32_t aWrapColumn) {
|
|
MOZ_ASSERT(aResult.IsEmpty());
|
|
|
|
const uint32_t width = (aWrapColumn > 0 ? aWrapColumn : 25);
|
|
while (aResult.Length() < width) {
|
|
aResult.Append(char16_t('-'));
|
|
}
|
|
}
|
|
|
|
nsresult nsPlainTextSerializer::DoAddLeaf(const nsAtom* aTag) {
|
|
mPreformattedBlockBoundary = false;
|
|
|
|
if (!DoOutput()) {
|
|
return NS_OK;
|
|
}
|
|
|
|
if (mLineBreakDue) EnsureVerticalSpace(mFloatingLines);
|
|
|
|
if (MustSuppressLeaf()) {
|
|
return NS_OK;
|
|
}
|
|
|
|
if (aTag == nsGkAtoms::br) {
|
|
// Another egregious editor workaround, see bug 38194:
|
|
// ignore the bogus br tags that the editor sticks here and there.
|
|
// FYI: `brElement` may be `nullptr` if the element is <br> element
|
|
// of non-HTML element.
|
|
// XXX Do we need to call `EnsureVerticalSpace()` when the <br> element
|
|
// is not an HTML element?
|
|
HTMLBRElement* brElement = HTMLBRElement::FromNodeOrNull(mElement);
|
|
if (!brElement || !brElement->IsPaddingForEmptyLastLine()) {
|
|
EnsureVerticalSpace(mEmptyLines + 1);
|
|
}
|
|
} else if (aTag == nsGkAtoms::hr &&
|
|
mSettings.HasFlag(nsIDocumentEncoder::OutputFormatted)) {
|
|
EnsureVerticalSpace(0);
|
|
|
|
// Make a line of dashes as wide as the wrap width
|
|
// XXX honoring percentage would be nice
|
|
nsAutoString line;
|
|
CreateLineOfDashes(line, mSettings.GetWrapColumn());
|
|
Write(line);
|
|
|
|
EnsureVerticalSpace(0);
|
|
} else if (aTag == nsGkAtoms::img) {
|
|
/* Output (in decreasing order of preference)
|
|
alt, title or nothing */
|
|
// See <http://www.w3.org/TR/REC-html40/struct/objects.html#edef-IMG>
|
|
nsAutoString imageDescription;
|
|
if (NS_SUCCEEDED(GetAttributeValue(nsGkAtoms::alt, imageDescription))) {
|
|
// If the alt attribute has an empty value (|alt=""|), output nothing
|
|
} else if (NS_SUCCEEDED(
|
|
GetAttributeValue(nsGkAtoms::title, imageDescription)) &&
|
|
!imageDescription.IsEmpty()) {
|
|
imageDescription =
|
|
NS_LITERAL_STRING(" [") + imageDescription + NS_LITERAL_STRING("] ");
|
|
}
|
|
|
|
Write(imageDescription);
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
/**
|
|
* Adds as many newline as necessary to get |aNumberOfRows| empty lines
|
|
*
|
|
* aNumberOfRows = -1 : Being in the middle of some line of text
|
|
* aNumberOfRows = 0 : Being at the start of a line
|
|
* aNumberOfRows = n>0 : Having n empty lines before the current line.
|
|
*/
|
|
void nsPlainTextSerializer::EnsureVerticalSpace(const int32_t aNumberOfRows) {
|
|
// If we have something in the indent we probably want to output
|
|
// it and it's not included in the count for empty lines so we don't
|
|
// realize that we should start a new line.
|
|
if (aNumberOfRows >= 0 && !mCurrentLine.mIndentation.mHeader.IsEmpty()) {
|
|
EndLine(false);
|
|
mInWhitespace = true;
|
|
}
|
|
|
|
while (mEmptyLines < aNumberOfRows) {
|
|
EndLine(false);
|
|
mInWhitespace = true;
|
|
}
|
|
mLineBreakDue = false;
|
|
mFloatingLines = -1;
|
|
}
|
|
|
|
void nsPlainTextSerializer::OutputManager::Flush(CurrentLine& aCurrentLine) {
|
|
if (!aCurrentLine.mContent.IsEmpty()) {
|
|
aCurrentLine.MaybeReplaceNbspsInContent(mFlags);
|
|
|
|
Append(aCurrentLine, StripTrailingWhitespaces::kNo);
|
|
|
|
aCurrentLine.ResetContentAndIndentationHeader();
|
|
}
|
|
}
|
|
|
|
static bool IsSpaceStuffable(const char16_t* s) {
|
|
return (s[0] == '>' || s[0] == ' ' || s[0] == kNBSP ||
|
|
NS_strncmp(s, u"From ", 5) == 0);
|
|
}
|
|
|
|
void nsPlainTextSerializer::MaybeWrapAndOutputCompleteLines() {
|
|
if (!mSettings.MayWrap()) {
|
|
return;
|
|
}
|
|
|
|
const uint32_t prefixwidth = mCurrentLine.DeterminePrefixWidth();
|
|
|
|
// The width of the line as it will appear on the screen (approx.).
|
|
uint32_t currentLineContentWidth =
|
|
GetUnicharStringWidth(mCurrentLine.mContent);
|
|
|
|
// Yes, wrap!
|
|
// The "+4" is to avoid wrap lines that only would be a couple
|
|
// of letters too long. We give this bonus only if the
|
|
// wrapcolumn is more than 20.
|
|
const uint32_t wrapColumn = mSettings.GetWrapColumn();
|
|
uint32_t bonuswidth = (wrapColumn > 20) ? 4 : 0;
|
|
|
|
while (currentLineContentWidth + prefixwidth > wrapColumn + bonuswidth) {
|
|
const int32_t goodSpace = mCurrentLine.FindWrapIndexForContent(
|
|
wrapColumn, currentLineContentWidth, mLineBreaker);
|
|
|
|
const int32_t contentLength = mCurrentLine.mContent.Length();
|
|
if ((goodSpace < contentLength) && (goodSpace > 0)) {
|
|
// Found a place to break
|
|
|
|
// -1 (trim a char at the break position)
|
|
// only if the line break was a space.
|
|
nsAutoString restOfContent;
|
|
if (nsCRT::IsAsciiSpace(mCurrentLine.mContent.CharAt(goodSpace))) {
|
|
mCurrentLine.mContent.Right(restOfContent,
|
|
contentLength - goodSpace - 1);
|
|
} else {
|
|
mCurrentLine.mContent.Right(restOfContent, contentLength - goodSpace);
|
|
}
|
|
// if breaker was U+0020, it has to consider for delsp=yes support
|
|
const bool breakBySpace = mCurrentLine.mContent.CharAt(goodSpace) == ' ';
|
|
mCurrentLine.mContent.Truncate(goodSpace);
|
|
EndLine(true, breakBySpace);
|
|
mCurrentLine.mContent.Truncate();
|
|
// Space stuff new line?
|
|
if (mSettings.HasFlag(nsIDocumentEncoder::OutputFormatFlowed)) {
|
|
if (!restOfContent.IsEmpty() && IsSpaceStuffable(restOfContent.get()) &&
|
|
mCurrentLine.mCiteQuoteLevel ==
|
|
0 // We space-stuff quoted lines anyway
|
|
) {
|
|
// Space stuffing a la RFC 2646 (format=flowed).
|
|
mCurrentLine.mContent.Append(char16_t(' '));
|
|
// XXX doesn't seem to work correctly for ' '
|
|
}
|
|
}
|
|
mCurrentLine.mContent.Append(restOfContent);
|
|
currentLineContentWidth = GetUnicharStringWidth(mCurrentLine.mContent);
|
|
mEmptyLines = -1;
|
|
} else {
|
|
// Nothing to do. Hopefully we get more data later
|
|
// to use for a place to break line
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* This function adds a piece of text to the current stored line. If we are
|
|
* wrapping text and the stored line will become too long, a suitable
|
|
* location to wrap will be found and the line that's complete will be
|
|
* output.
|
|
*/
|
|
void nsPlainTextSerializer::AddToLine(const char16_t* aLineFragment,
|
|
int32_t aLineFragmentLength) {
|
|
if (mLineBreakDue) EnsureVerticalSpace(mFloatingLines);
|
|
|
|
if (mCurrentLine.mContent.IsEmpty()) {
|
|
if (0 == aLineFragmentLength) {
|
|
return;
|
|
}
|
|
|
|
if (mSettings.HasFlag(nsIDocumentEncoder::OutputFormatFlowed)) {
|
|
if (IsSpaceStuffable(aLineFragment) &&
|
|
mCurrentLine.mCiteQuoteLevel ==
|
|
0 // We space-stuff quoted lines anyway
|
|
) {
|
|
// Space stuffing a la RFC 2646 (format=flowed).
|
|
mCurrentLine.mContent.Append(char16_t(' '));
|
|
}
|
|
}
|
|
mEmptyLines = -1;
|
|
}
|
|
|
|
mCurrentLine.mContent.Append(aLineFragment, aLineFragmentLength);
|
|
|
|
MaybeWrapAndOutputCompleteLines();
|
|
}
|
|
|
|
// The signature separator (RFC 2646).
|
|
const char kSignatureSeparator[] = "-- ";
|
|
|
|
// The OpenPGP dash-escaped signature separator in inline
|
|
// signed messages according to the OpenPGP standard (RFC 2440).
|
|
const char kDashEscapedSignatureSeparator[] = "- -- ";
|
|
|
|
static bool IsSignatureSeparator(const nsAString& aString) {
|
|
return aString.EqualsLiteral(kSignatureSeparator) ||
|
|
aString.EqualsLiteral(kDashEscapedSignatureSeparator);
|
|
}
|
|
|
|
/**
|
|
* Outputs the contents of mCurrentLine.mContent, and resets line
|
|
* specific variables. Also adds an indentation and prefix if there is one
|
|
* specified. Strips ending spaces from the line if it isn't preformatted.
|
|
*/
|
|
void nsPlainTextSerializer::EndLine(bool aSoftLineBreak, bool aBreakBySpace) {
|
|
if (aSoftLineBreak && mCurrentLine.mContent.IsEmpty()) {
|
|
// No meaning
|
|
return;
|
|
}
|
|
|
|
/* In non-preformatted mode, remove spaces from the end of the line for
|
|
* format=flowed compatibility. Don't do this for these special cases:
|
|
* "-- ", the signature separator (RFC 2646) shouldn't be touched and
|
|
* "- -- ", the OpenPGP dash-escaped signature separator in inline
|
|
* signed messages according to the OpenPGP standard (RFC 2440).
|
|
*/
|
|
if (!mSettings.HasFlag(nsIDocumentEncoder::OutputPreformatted) &&
|
|
(aSoftLineBreak || !IsSignatureSeparator(mCurrentLine.mContent))) {
|
|
mCurrentLine.mContent.Trim(" ", false, true, false);
|
|
}
|
|
|
|
if (aSoftLineBreak &&
|
|
mSettings.HasFlag(nsIDocumentEncoder::OutputFormatFlowed) &&
|
|
(mCurrentLine.mIndentation.mLength == 0)) {
|
|
// Add the soft part of the soft linebreak (RFC 2646 4.1)
|
|
// We only do this when there is no indentation since format=flowed
|
|
// lines and indentation doesn't work well together.
|
|
|
|
// If breaker character is ASCII space with RFC 3676 support (delsp=yes),
|
|
// add twice space.
|
|
if (mSettings.HasFlag(nsIDocumentEncoder::OutputFormatDelSp) &&
|
|
aBreakBySpace) {
|
|
mCurrentLine.mContent.AppendLiteral(" ");
|
|
} else {
|
|
mCurrentLine.mContent.Append(char16_t(' '));
|
|
}
|
|
}
|
|
|
|
if (aSoftLineBreak) {
|
|
mEmptyLines = 0;
|
|
} else {
|
|
// Hard break
|
|
if (mCurrentLine.HasContentOrIndentationHeader()) {
|
|
mEmptyLines = 0;
|
|
} else {
|
|
mEmptyLines++;
|
|
}
|
|
}
|
|
|
|
MOZ_ASSERT(mOutputManager);
|
|
|
|
mCurrentLine.MaybeReplaceNbspsInContent(mSettings.GetFlags());
|
|
|
|
// If we don't have anything "real" to output we have to
|
|
// make sure the indent doesn't end in a space since that
|
|
// would trick a format=flowed-aware receiver.
|
|
mOutputManager->Append(mCurrentLine,
|
|
OutputManager::StripTrailingWhitespaces::kMaybe);
|
|
mOutputManager->AppendLineBreak();
|
|
mCurrentLine.ResetContentAndIndentationHeader();
|
|
mInWhitespace = true;
|
|
mLineBreakDue = false;
|
|
mFloatingLines = -1;
|
|
}
|
|
|
|
/**
|
|
* Creates the calculated and stored indent and text in the indentation. That is
|
|
* quote chars and numbers for numbered lists and such.
|
|
*/
|
|
void nsPlainTextSerializer::CurrentLine::CreateQuotesAndIndent(
|
|
nsAString& aResult) const {
|
|
// Put the mail quote "> " chars in, if appropriate:
|
|
if (mCiteQuoteLevel > 0) {
|
|
nsAutoString quotes;
|
|
for (int i = 0; i < mCiteQuoteLevel; i++) {
|
|
quotes.Append(char16_t('>'));
|
|
}
|
|
if (!mContent.IsEmpty()) {
|
|
/* Better don't output a space here, if the line is empty,
|
|
in case a receiving format=flowed-aware UA thinks, this were a flowed
|
|
line, which it isn't - it's just empty. (Flowed lines may be joined
|
|
with the following one, so the empty line may be lost completely.) */
|
|
quotes.Append(char16_t(' '));
|
|
}
|
|
aResult = quotes;
|
|
}
|
|
|
|
// Indent if necessary
|
|
int32_t indentwidth = mIndentation.mLength - mIndentation.mHeader.Length();
|
|
if (indentwidth > 0 && HasContentOrIndentationHeader()
|
|
// Don't make empty lines look flowed
|
|
) {
|
|
nsAutoString spaces;
|
|
for (int i = 0; i < indentwidth; ++i) spaces.Append(char16_t(' '));
|
|
aResult += spaces;
|
|
}
|
|
|
|
if (!mIndentation.mHeader.IsEmpty()) {
|
|
aResult += mIndentation.mHeader;
|
|
}
|
|
}
|
|
|
|
static bool IsLineFeedCarriageReturnBlankOrTab(char16_t c) {
|
|
return ('\n' == c || '\r' == c || ' ' == c || '\t' == c);
|
|
}
|
|
|
|
static void ReplaceVisiblyTrailingNbsps(nsAString& aString) {
|
|
const int32_t totLen = aString.Length();
|
|
for (int32_t i = totLen - 1; i >= 0; i--) {
|
|
char16_t c = aString[i];
|
|
if (IsLineFeedCarriageReturnBlankOrTab(c)) {
|
|
continue;
|
|
}
|
|
if (kNBSP == c) {
|
|
aString.Replace(i, 1, ' ');
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
void nsPlainTextSerializer::ConvertToLinesAndOutput(const nsAString& aString) {
|
|
const int32_t totLen = aString.Length();
|
|
int32_t newline{0};
|
|
|
|
// Put the mail quote "> " chars in, if appropriate.
|
|
// Have to put it in before every line.
|
|
int32_t bol = 0;
|
|
while (bol < totLen) {
|
|
bool outputLineBreak = false;
|
|
bool spacesOnly = true;
|
|
|
|
// Find one of '\n' or '\r' using iterators since nsAString
|
|
// doesn't have the old FindCharInSet function.
|
|
nsAString::const_iterator iter;
|
|
aString.BeginReading(iter);
|
|
nsAString::const_iterator done_searching;
|
|
aString.EndReading(done_searching);
|
|
iter.advance(bol);
|
|
int32_t new_newline = bol;
|
|
newline = kNotFound;
|
|
while (iter != done_searching) {
|
|
if ('\n' == *iter || '\r' == *iter) {
|
|
newline = new_newline;
|
|
break;
|
|
}
|
|
if (' ' != *iter) {
|
|
spacesOnly = false;
|
|
}
|
|
++new_newline;
|
|
++iter;
|
|
}
|
|
|
|
// Done searching
|
|
nsAutoString stringpart;
|
|
if (newline == kNotFound) {
|
|
// No new lines.
|
|
stringpart.Assign(Substring(aString, bol, totLen - bol));
|
|
if (!stringpart.IsEmpty()) {
|
|
char16_t lastchar = stringpart.Last();
|
|
mInWhitespace = IsLineFeedCarriageReturnBlankOrTab(lastchar);
|
|
}
|
|
mEmptyLines = -1;
|
|
bol = totLen;
|
|
} else {
|
|
// There is a newline
|
|
stringpart.Assign(Substring(aString, bol, newline - bol));
|
|
mInWhitespace = true;
|
|
outputLineBreak = true;
|
|
mEmptyLines = 0;
|
|
bol = newline + 1;
|
|
if ('\r' == *iter && bol < totLen && '\n' == *++iter) {
|
|
// There was a CRLF in the input. This used to be illegal and
|
|
// stripped by the parser. Apparently not anymore. Let's skip
|
|
// over the LF.
|
|
bol++;
|
|
}
|
|
}
|
|
|
|
if (mSettings.HasFlag(nsIDocumentEncoder::OutputFormatFlowed)) {
|
|
if ((outputLineBreak || !spacesOnly) && // bugs 261467,125928
|
|
!IsQuotedLine(stringpart) && !IsSignatureSeparator(stringpart)) {
|
|
stringpart.Trim(" ", false, true, true);
|
|
}
|
|
if (IsSpaceStuffable(stringpart.get()) && !IsQuotedLine(stringpart)) {
|
|
mCurrentLine.mContent.Append(char16_t(' '));
|
|
}
|
|
}
|
|
mCurrentLine.mContent.Append(stringpart);
|
|
|
|
mCurrentLine.MaybeReplaceNbspsInContent(mSettings.GetFlags());
|
|
|
|
mOutputManager->Append(mCurrentLine,
|
|
OutputManager::StripTrailingWhitespaces::kNo);
|
|
if (outputLineBreak) {
|
|
mOutputManager->AppendLineBreak();
|
|
}
|
|
|
|
mCurrentLine.ResetContentAndIndentationHeader();
|
|
}
|
|
|
|
#ifdef DEBUG_wrapping
|
|
printf("No wrapping: newline is %d, totLen is %d\n", newline, totLen);
|
|
#endif
|
|
}
|
|
|
|
/**
|
|
* Write a string. This is the highlevel function to use to get text output.
|
|
* By using AddToLine, Output, EndLine and other functions it handles quotation,
|
|
* line wrapping, indentation, whitespace compression and other things.
|
|
*/
|
|
void nsPlainTextSerializer::Write(const nsAString& aStr) {
|
|
// XXX Copy necessary to use nsString methods and gain
|
|
// access to underlying buffer
|
|
nsAutoString str(aStr);
|
|
|
|
#ifdef DEBUG_wrapping
|
|
printf("Write(%s): wrap col = %d\n", NS_ConvertUTF16toUTF8(str).get(),
|
|
mSettings.GetWrapColumn());
|
|
#endif
|
|
|
|
const int32_t totLen = str.Length();
|
|
|
|
// If the string is empty, do nothing:
|
|
if (totLen <= 0) return;
|
|
|
|
// For Flowed text change nbsp-ses to spaces at end of lines to allow them
|
|
// to be cut off along with usual spaces if required. (bug #125928)
|
|
if (mSettings.HasFlag(nsIDocumentEncoder::OutputFormatFlowed)) {
|
|
ReplaceVisiblyTrailingNbsps(str);
|
|
}
|
|
|
|
// We have two major codepaths here. One that does preformatted text and one
|
|
// that does normal formatted text. The one for preformatted text calls
|
|
// Output directly while the other code path goes through AddToLine.
|
|
if ((mPreFormattedMail && !mSettings.GetWrapColumn()) ||
|
|
(IsElementPreformatted() && !mPreFormattedMail) ||
|
|
(mSpanLevel > 0 && mEmptyLines >= 0 && IsQuotedLine(str))) {
|
|
// No intelligent wrapping.
|
|
|
|
// This mustn't be mixed with intelligent wrapping without clearing
|
|
// the mCurrentLine.mContent buffer before!!!
|
|
NS_ASSERTION(mCurrentLine.mContent.IsEmpty() ||
|
|
(IsElementPreformatted() && !mPreFormattedMail),
|
|
"Mixed wrapping data and nonwrapping data on the same line");
|
|
MOZ_ASSERT(mOutputManager);
|
|
|
|
if (!mCurrentLine.mContent.IsEmpty()) {
|
|
mOutputManager->Flush(mCurrentLine);
|
|
}
|
|
|
|
ConvertToLinesAndOutput(str);
|
|
return;
|
|
}
|
|
|
|
// Intelligent handling of text
|
|
// If needed, strip out all "end of lines"
|
|
// and multiple whitespace between words
|
|
int32_t nextpos;
|
|
const char16_t* offsetIntoBuffer = nullptr;
|
|
|
|
int32_t bol = 0;
|
|
while (bol < totLen) { // Loop over lines
|
|
// Find a place where we may have to do whitespace compression
|
|
nextpos = str.FindCharInSet(" \t\n\r", bol);
|
|
#ifdef DEBUG_wrapping
|
|
nsAutoString remaining;
|
|
str.Right(remaining, totLen - bol);
|
|
foo = ToNewCString(remaining);
|
|
// printf("Next line: bol = %d, newlinepos = %d, totLen = %d, "
|
|
// "string = '%s'\n", bol, nextpos, totLen, foo);
|
|
free(foo);
|
|
#endif
|
|
|
|
if (nextpos == kNotFound) {
|
|
// The rest of the string
|
|
offsetIntoBuffer = str.get() + bol;
|
|
AddToLine(offsetIntoBuffer, totLen - bol);
|
|
bol = totLen;
|
|
mInWhitespace = false;
|
|
} else {
|
|
// There's still whitespace left in the string
|
|
if (nextpos != 0 && (nextpos + 1) < totLen) {
|
|
offsetIntoBuffer = str.get() + nextpos;
|
|
// skip '\n' if it is between CJ chars
|
|
if (offsetIntoBuffer[0] == '\n' && IS_CJ_CHAR(offsetIntoBuffer[-1]) &&
|
|
IS_CJ_CHAR(offsetIntoBuffer[1])) {
|
|
offsetIntoBuffer = str.get() + bol;
|
|
AddToLine(offsetIntoBuffer, nextpos - bol);
|
|
bol = nextpos + 1;
|
|
continue;
|
|
}
|
|
}
|
|
// If we're already in whitespace and not preformatted, just skip it:
|
|
if (mInWhitespace && (nextpos == bol) && !mPreFormattedMail &&
|
|
!mSettings.HasFlag(nsIDocumentEncoder::OutputPreformatted)) {
|
|
// Skip whitespace
|
|
bol++;
|
|
continue;
|
|
}
|
|
|
|
if (nextpos == bol) {
|
|
// Note that we are in whitespace.
|
|
mInWhitespace = true;
|
|
offsetIntoBuffer = str.get() + nextpos;
|
|
AddToLine(offsetIntoBuffer, 1);
|
|
bol++;
|
|
continue;
|
|
}
|
|
|
|
mInWhitespace = true;
|
|
|
|
offsetIntoBuffer = str.get() + bol;
|
|
if (mPreFormattedMail ||
|
|
mSettings.HasFlag(nsIDocumentEncoder::OutputPreformatted)) {
|
|
// Preserve the real whitespace character
|
|
nextpos++;
|
|
AddToLine(offsetIntoBuffer, nextpos - bol);
|
|
bol = nextpos;
|
|
} else {
|
|
// Replace the whitespace with a space
|
|
AddToLine(offsetIntoBuffer, nextpos - bol);
|
|
AddToLine(kSpace.get(), 1);
|
|
bol = nextpos + 1; // Let's eat the whitespace
|
|
}
|
|
}
|
|
} // Continue looping over the string
|
|
}
|
|
|
|
/**
|
|
* Gets the value of an attribute in a string. If the function returns
|
|
* NS_ERROR_NOT_AVAILABLE, there was none such attribute specified.
|
|
*/
|
|
nsresult nsPlainTextSerializer::GetAttributeValue(const nsAtom* aName,
|
|
nsString& aValueRet) const {
|
|
if (mElement) {
|
|
if (mElement->GetAttr(kNameSpaceID_None, aName, aValueRet)) {
|
|
return NS_OK;
|
|
}
|
|
}
|
|
|
|
return NS_ERROR_NOT_AVAILABLE;
|
|
}
|
|
|
|
/**
|
|
* Returns true, if the element was inserted by Moz' TXT->HTML converter.
|
|
* In this case, we should ignore it.
|
|
*/
|
|
bool nsPlainTextSerializer::IsCurrentNodeConverted() const {
|
|
nsAutoString value;
|
|
nsresult rv = GetAttributeValue(nsGkAtoms::_class, value);
|
|
return (NS_SUCCEEDED(rv) && (value.EqualsIgnoreCase("moz-txt", 7) ||
|
|
value.EqualsIgnoreCase("\"moz-txt", 8)));
|
|
}
|
|
|
|
// static
|
|
nsAtom* nsPlainTextSerializer::GetIdForContent(nsIContent* aContent) {
|
|
if (!aContent->IsHTMLElement()) {
|
|
return nullptr;
|
|
}
|
|
|
|
nsAtom* localName = aContent->NodeInfo()->NameAtom();
|
|
return localName->IsStatic() ? localName : nullptr;
|
|
}
|
|
|
|
bool nsPlainTextSerializer::IsElementPreformatted() const {
|
|
return !mPreformatStack.empty() && mPreformatStack.top();
|
|
}
|
|
|
|
bool nsPlainTextSerializer::IsElementPreformatted(Element* aElement) {
|
|
RefPtr<ComputedStyle> computedStyle =
|
|
nsComputedDOMStyle::GetComputedStyleNoFlush(aElement, nullptr);
|
|
if (computedStyle) {
|
|
const nsStyleText* textStyle = computedStyle->StyleText();
|
|
return textStyle->WhiteSpaceOrNewlineIsSignificant();
|
|
}
|
|
// Fall back to looking at the tag, in case there is no style information.
|
|
return GetIdForContent(aElement) == nsGkAtoms::pre;
|
|
}
|
|
|
|
bool nsPlainTextSerializer::IsCssBlockLevelElement(Element* aElement) {
|
|
RefPtr<ComputedStyle> computedStyle =
|
|
nsComputedDOMStyle::GetComputedStyleNoFlush(aElement, nullptr);
|
|
if (computedStyle) {
|
|
const nsStyleDisplay* displayStyle = computedStyle->StyleDisplay();
|
|
return displayStyle->IsBlockOutsideStyle();
|
|
}
|
|
// Fall back to looking at the tag, in case there is no style information.
|
|
return nsContentUtils::IsHTMLBlockLevelElement(aElement);
|
|
}
|
|
|
|
/**
|
|
* This method is required only to identify LI's inside OL.
|
|
* Returns TRUE if we are inside an OL tag and FALSE otherwise.
|
|
*/
|
|
bool nsPlainTextSerializer::IsInOL() const {
|
|
int32_t i = mTagStackIndex;
|
|
while (--i >= 0) {
|
|
if (mTagStack[i] == nsGkAtoms::ol) return true;
|
|
if (mTagStack[i] == nsGkAtoms::ul) {
|
|
// If a UL is reached first, LI belongs the UL nested in OL.
|
|
return false;
|
|
}
|
|
}
|
|
// We may reach here for orphan LI's.
|
|
return false;
|
|
}
|
|
|
|
bool nsPlainTextSerializer::IsInOlOrUl() const {
|
|
return (mULCount > 0) || !mOLStack.IsEmpty();
|
|
}
|
|
|
|
/*
|
|
@return 0 = no header, 1 = h1, ..., 6 = h6
|
|
*/
|
|
int32_t HeaderLevel(const nsAtom* aTag) {
|
|
if (aTag == nsGkAtoms::h1) {
|
|
return 1;
|
|
}
|
|
if (aTag == nsGkAtoms::h2) {
|
|
return 2;
|
|
}
|
|
if (aTag == nsGkAtoms::h3) {
|
|
return 3;
|
|
}
|
|
if (aTag == nsGkAtoms::h4) {
|
|
return 4;
|
|
}
|
|
if (aTag == nsGkAtoms::h5) {
|
|
return 5;
|
|
}
|
|
if (aTag == nsGkAtoms::h6) {
|
|
return 6;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* This is an implementation of GetUnicharWidth() and
|
|
* GetUnicharStringWidth() as defined in
|
|
* "The Single UNIX Specification, Version 2, The Open Group, 1997"
|
|
* <http://www.UNIX-systems.org/online.html>
|
|
*
|
|
* Markus Kuhn -- 2000-02-08 -- public domain
|
|
*
|
|
* Minor alterations to fit Mozilla's data types by Daniel Bratell
|
|
*/
|
|
|
|
/* These functions define the column width of an ISO 10646 character
|
|
* as follows:
|
|
*
|
|
* - The null character (U+0000) has a column width of 0.
|
|
*
|
|
* - Other C0/C1 control characters and DEL will lead to a return
|
|
* value of -1.
|
|
*
|
|
* - Non-spacing and enclosing combining characters (general
|
|
* category code Mn or Me in the Unicode database) have a
|
|
* column width of 0.
|
|
*
|
|
* - Spacing characters in the East Asian Wide (W) or East Asian
|
|
* FullWidth (F) category as defined in Unicode Technical
|
|
* Report #11 have a column width of 2.
|
|
*
|
|
* - All remaining characters (including all printable
|
|
* ISO 8859-1 and WGL4 characters, Unicode control characters,
|
|
* etc.) have a column width of 1.
|
|
*
|
|
* This implementation assumes that wchar_t characters are encoded
|
|
* in ISO 10646.
|
|
*/
|
|
|
|
namespace {
|
|
|
|
struct interval {
|
|
uint16_t first;
|
|
uint16_t last;
|
|
};
|
|
|
|
struct CombiningComparator {
|
|
const char16_t mUcs;
|
|
explicit CombiningComparator(char16_t aUcs) : mUcs(aUcs) {}
|
|
int operator()(const interval& combining) const {
|
|
if (mUcs > combining.last) return 1;
|
|
if (mUcs < combining.first) return -1;
|
|
|
|
MOZ_ASSERT(combining.first <= mUcs);
|
|
MOZ_ASSERT(mUcs <= combining.last);
|
|
return 0;
|
|
}
|
|
};
|
|
|
|
} // namespace
|
|
|
|
int32_t GetUnicharWidth(char16_t ucs) {
|
|
/* sorted list of non-overlapping intervals of non-spacing characters */
|
|
static const interval combining[] = {
|
|
{0x0300, 0x034E}, {0x0360, 0x0362}, {0x0483, 0x0486}, {0x0488, 0x0489},
|
|
{0x0591, 0x05A1}, {0x05A3, 0x05B9}, {0x05BB, 0x05BD}, {0x05BF, 0x05BF},
|
|
{0x05C1, 0x05C2}, {0x05C4, 0x05C4}, {0x064B, 0x0655}, {0x0670, 0x0670},
|
|
{0x06D6, 0x06E4}, {0x06E7, 0x06E8}, {0x06EA, 0x06ED}, {0x0711, 0x0711},
|
|
{0x0730, 0x074A}, {0x07A6, 0x07B0}, {0x0901, 0x0902}, {0x093C, 0x093C},
|
|
{0x0941, 0x0948}, {0x094D, 0x094D}, {0x0951, 0x0954}, {0x0962, 0x0963},
|
|
{0x0981, 0x0981}, {0x09BC, 0x09BC}, {0x09C1, 0x09C4}, {0x09CD, 0x09CD},
|
|
{0x09E2, 0x09E3}, {0x0A02, 0x0A02}, {0x0A3C, 0x0A3C}, {0x0A41, 0x0A42},
|
|
{0x0A47, 0x0A48}, {0x0A4B, 0x0A4D}, {0x0A70, 0x0A71}, {0x0A81, 0x0A82},
|
|
{0x0ABC, 0x0ABC}, {0x0AC1, 0x0AC5}, {0x0AC7, 0x0AC8}, {0x0ACD, 0x0ACD},
|
|
{0x0B01, 0x0B01}, {0x0B3C, 0x0B3C}, {0x0B3F, 0x0B3F}, {0x0B41, 0x0B43},
|
|
{0x0B4D, 0x0B4D}, {0x0B56, 0x0B56}, {0x0B82, 0x0B82}, {0x0BC0, 0x0BC0},
|
|
{0x0BCD, 0x0BCD}, {0x0C3E, 0x0C40}, {0x0C46, 0x0C48}, {0x0C4A, 0x0C4D},
|
|
{0x0C55, 0x0C56}, {0x0CBF, 0x0CBF}, {0x0CC6, 0x0CC6}, {0x0CCC, 0x0CCD},
|
|
{0x0D41, 0x0D43}, {0x0D4D, 0x0D4D}, {0x0DCA, 0x0DCA}, {0x0DD2, 0x0DD4},
|
|
{0x0DD6, 0x0DD6}, {0x0E31, 0x0E31}, {0x0E34, 0x0E3A}, {0x0E47, 0x0E4E},
|
|
{0x0EB1, 0x0EB1}, {0x0EB4, 0x0EB9}, {0x0EBB, 0x0EBC}, {0x0EC8, 0x0ECD},
|
|
{0x0F18, 0x0F19}, {0x0F35, 0x0F35}, {0x0F37, 0x0F37}, {0x0F39, 0x0F39},
|
|
{0x0F71, 0x0F7E}, {0x0F80, 0x0F84}, {0x0F86, 0x0F87}, {0x0F90, 0x0F97},
|
|
{0x0F99, 0x0FBC}, {0x0FC6, 0x0FC6}, {0x102D, 0x1030}, {0x1032, 0x1032},
|
|
{0x1036, 0x1037}, {0x1039, 0x1039}, {0x1058, 0x1059}, {0x17B7, 0x17BD},
|
|
{0x17C6, 0x17C6}, {0x17C9, 0x17D3}, {0x18A9, 0x18A9}, {0x20D0, 0x20E3},
|
|
{0x302A, 0x302F}, {0x3099, 0x309A}, {0xFB1E, 0xFB1E}, {0xFE20, 0xFE23}};
|
|
|
|
/* test for 8-bit control characters */
|
|
if (ucs == 0) return 0;
|
|
if (ucs < 32 || (ucs >= 0x7f && ucs < 0xa0)) return -1;
|
|
|
|
/* first quick check for Latin-1 etc. characters */
|
|
if (ucs < combining[0].first) return 1;
|
|
|
|
/* binary search in table of non-spacing characters */
|
|
size_t idx;
|
|
if (BinarySearchIf(combining, 0, ArrayLength(combining),
|
|
CombiningComparator(ucs), &idx)) {
|
|
return 0;
|
|
}
|
|
|
|
/* if we arrive here, ucs is not a combining or C0/C1 control character */
|
|
|
|
/* fast test for majority of non-wide scripts */
|
|
if (ucs < 0x1100) return 1;
|
|
|
|
return 1 +
|
|
((ucs >= 0x1100 && ucs <= 0x115f) || /* Hangul Jamo */
|
|
(ucs >= 0x2e80 && ucs <= 0xa4cf && (ucs & ~0x0011) != 0x300a &&
|
|
ucs != 0x303f) || /* CJK ... Yi */
|
|
(ucs >= 0xac00 && ucs <= 0xd7a3) || /* Hangul Syllables */
|
|
(ucs >= 0xf900 && ucs <= 0xfaff) || /* CJK Compatibility Ideographs */
|
|
(ucs >= 0xfe30 && ucs <= 0xfe6f) || /* CJK Compatibility Forms */
|
|
(ucs >= 0xff00 && ucs <= 0xff5f) || /* Fullwidth Forms */
|
|
(ucs >= 0xffe0 && ucs <= 0xffe6));
|
|
}
|
|
|
|
int32_t GetUnicharStringWidth(const nsString& aString) {
|
|
const char16_t* pwcs = aString.get();
|
|
int32_t n = aString.Length();
|
|
|
|
int32_t w, width = 0;
|
|
|
|
for (; *pwcs && n-- > 0; pwcs++)
|
|
if ((w = GetUnicharWidth(*pwcs)) < 0)
|
|
++width; // Taking 1 as the width of non-printable character, for bug#
|
|
// 94475.
|
|
else
|
|
width += w;
|
|
|
|
return width;
|
|
}
|