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-rw-r--r--dom/serializers/nsPlainTextSerializer.cpp1906
1 files changed, 1906 insertions, 0 deletions
diff --git a/dom/serializers/nsPlainTextSerializer.cpp b/dom/serializers/nsPlainTextSerializer.cpp
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+++ b/dom/serializers/nsPlainTextSerializer.cpp
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+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/*
+ * nsIContentSerializer implementation that can be used with an
+ * nsIDocumentEncoder to convert a DOM into plaintext in a nice way
+ * (eg for copy/paste as plaintext).
+ */
+
+#include "nsPlainTextSerializer.h"
+
+#include <limits>
+
+#include "nsPrintfCString.h"
+#include "nsDebug.h"
+#include "nsGkAtoms.h"
+#include "nsNameSpaceManager.h"
+#include "nsTextFragment.h"
+#include "nsContentUtils.h"
+#include "nsReadableUtils.h"
+#include "nsUnicharUtils.h"
+#include "nsCRT.h"
+#include "mozilla/EditorUtils.h"
+#include "mozilla/dom/CharacterData.h"
+#include "mozilla/dom/Element.h"
+#include "mozilla/dom/HTMLBRElement.h"
+#include "mozilla/dom/Text.h"
+#include "mozilla/Preferences.h"
+#include "mozilla/StaticPrefs_converter.h"
+#include "mozilla/BinarySearch.h"
+#include "nsComputedDOMStyle.h"
+
+namespace mozilla {
+class Encoding;
+}
+
+using namespace mozilla;
+using namespace mozilla::dom;
+
+#define PREF_STRUCTS "converter.html2txt.structs"
+#define PREF_HEADER_STRATEGY "converter.html2txt.header_strategy"
+
+static const int32_t kTabSize = 4;
+static const int32_t kIndentSizeHeaders =
+ 2; /* Indention of h1, if
+ mHeaderStrategy = kIndentIncreasedWithHeaderLevel
+ or = kNumberHeadingsAndIndentSlightly. Indention of
+ other headers is derived from that. */
+static const int32_t kIndentIncrementHeaders =
+ 2; /* If mHeaderStrategy = kIndentIncreasedWithHeaderLevel,
+ indent h(x+1) this many
+ columns more than h(x) */
+static const int32_t kIndentSizeList = kTabSize;
+// Indention of non-first lines of ul and ol
+static const int32_t kIndentSizeDD = kTabSize; // Indention of <dd>
+static const char16_t kNBSP = 160;
+static const char16_t kSPACE = ' ';
+
+constexpr int32_t kNoFlags = 0;
+
+static int32_t HeaderLevel(const nsAtom* aTag);
+static int32_t GetUnicharWidth(char16_t ucs);
+static int32_t GetUnicharStringWidth(const nsString& aString);
+
+// Someday may want to make this non-const:
+static const uint32_t TagStackSize = 500;
+
+NS_IMPL_CYCLE_COLLECTING_ADDREF(nsPlainTextSerializer)
+NS_IMPL_CYCLE_COLLECTING_RELEASE(nsPlainTextSerializer)
+
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsPlainTextSerializer)
+ NS_INTERFACE_MAP_ENTRY(nsIContentSerializer)
+ NS_INTERFACE_MAP_ENTRY(nsISupports)
+NS_INTERFACE_MAP_END
+
+NS_IMPL_CYCLE_COLLECTION(nsPlainTextSerializer, mElement)
+
+nsresult NS_NewPlainTextSerializer(nsIContentSerializer** aSerializer) {
+ RefPtr<nsPlainTextSerializer> it = new nsPlainTextSerializer();
+ it.forget(aSerializer);
+ return NS_OK;
+}
+
+// @param aFlags As defined in nsIDocumentEncoder.idl.
+static void DetermineLineBreak(const int32_t aFlags, nsAString& aLineBreak) {
+ // Set the line break character:
+ if ((aFlags & nsIDocumentEncoder::OutputCRLineBreak) &&
+ (aFlags & nsIDocumentEncoder::OutputLFLineBreak)) {
+ // Windows
+ aLineBreak.AssignLiteral(u"\r\n");
+ } else if (aFlags & nsIDocumentEncoder::OutputCRLineBreak) {
+ // Mac
+ aLineBreak.AssignLiteral(u"\r");
+ } else if (aFlags & nsIDocumentEncoder::OutputLFLineBreak) {
+ // Unix/DOM
+ aLineBreak.AssignLiteral(u"\n");
+ } else {
+ // Platform/default
+ aLineBreak.AssignLiteral(NS_ULINEBREAK);
+ }
+}
+
+void nsPlainTextSerializer::CurrentLine::MaybeReplaceNbspsInContent(
+ const int32_t aFlags) {
+ if (!(aFlags & nsIDocumentEncoder::OutputPersistNBSP)) {
+ // First, replace all nbsp characters with spaces,
+ // which the unicode encoder won't do for us.
+ mContent.ReplaceChar(kNBSP, kSPACE);
+ }
+}
+
+void nsPlainTextSerializer::CurrentLine::ResetContentAndIndentationHeader() {
+ mContent.Truncate();
+ mIndentation.mHeader.Truncate();
+}
+
+int32_t nsPlainTextSerializer::CurrentLine::FindWrapIndexForContent(
+ const uint32_t aWrapColumn, const uint32_t aContentWidth,
+ mozilla::intl::LineBreaker* aLineBreaker) const {
+ MOZ_ASSERT(aContentWidth < std::numeric_limits<int32_t>::max());
+ MOZ_ASSERT(static_cast<int32_t>(aContentWidth) ==
+ GetUnicharStringWidth(mContent));
+
+ const uint32_t prefixwidth = DeterminePrefixWidth();
+ int32_t goodSpace = mContent.Length();
+
+ if (aLineBreaker) {
+ // We go from the end removing one letter at a time until
+ // we have a reasonable width
+ uint32_t width = aContentWidth;
+ while (goodSpace > 0 && (width + prefixwidth > aWrapColumn)) {
+ goodSpace--;
+ width -= GetUnicharWidth(mContent[goodSpace]);
+ }
+
+ goodSpace++;
+
+ goodSpace =
+ aLineBreaker->Prev(mContent.get(), mContent.Length(), goodSpace);
+ if (goodSpace != NS_LINEBREAKER_NEED_MORE_TEXT &&
+ nsCRT::IsAsciiSpace(mContent.CharAt(goodSpace - 1))) {
+ --goodSpace; // adjust the position since line breaker returns a
+ // position next to space
+ }
+ } else {
+ // In this case we don't want strings, especially CJK-ones, to be split.
+ // See
+ // https://bugzilla.mozilla.org/show_bug.cgi?id=333064 for more
+ // information.
+
+ if (mContent.IsEmpty() || aWrapColumn < prefixwidth) {
+ goodSpace = NS_LINEBREAKER_NEED_MORE_TEXT;
+ } else {
+ goodSpace = std::min(aWrapColumn - prefixwidth, mContent.Length() - 1);
+ while (goodSpace >= 0 &&
+ !nsCRT::IsAsciiSpace(mContent.CharAt(goodSpace))) {
+ goodSpace--;
+ }
+ }
+ }
+
+ if (goodSpace == NS_LINEBREAKER_NEED_MORE_TEXT) {
+ // If we didn't find a good place to break, accept long line and
+ // try to find another place to break
+ goodSpace =
+ (prefixwidth > aWrapColumn + 1) ? 1 : aWrapColumn - prefixwidth + 1;
+ if (aLineBreaker) {
+ if ((uint32_t)goodSpace < mContent.Length())
+ goodSpace =
+ aLineBreaker->Next(mContent.get(), mContent.Length(), goodSpace);
+ if (goodSpace == NS_LINEBREAKER_NEED_MORE_TEXT)
+ goodSpace = mContent.Length();
+ } else {
+ // In this case we don't want strings, especially CJK-ones, to be
+ // split. See
+ // https://bugzilla.mozilla.org/show_bug.cgi?id=333064 for more
+ // information.
+ goodSpace = (prefixwidth > aWrapColumn) ? 1 : aWrapColumn - prefixwidth;
+ const int32_t contentLength = mContent.Length();
+ while (goodSpace < contentLength &&
+ !nsCRT::IsAsciiSpace(mContent.CharAt(goodSpace))) {
+ goodSpace++;
+ }
+ }
+ }
+ return goodSpace;
+}
+
+nsPlainTextSerializer::OutputManager::OutputManager(const int32_t aFlags,
+ nsAString& aOutput)
+ : mFlags{aFlags}, mOutput{aOutput}, mAtFirstColumn{true} {
+ MOZ_ASSERT(aOutput.IsEmpty());
+
+ DetermineLineBreak(mFlags, mLineBreak);
+}
+
+void nsPlainTextSerializer::OutputManager::Append(
+ const CurrentLine& aCurrentLine,
+ const StripTrailingWhitespaces aStripTrailingWhitespaces) {
+ if (IsAtFirstColumn()) {
+ nsAutoString quotesAndIndent;
+ aCurrentLine.CreateQuotesAndIndent(quotesAndIndent);
+
+ if ((aStripTrailingWhitespaces == StripTrailingWhitespaces::kMaybe)) {
+ const bool stripTrailingSpaces = aCurrentLine.mContent.IsEmpty();
+ if (stripTrailingSpaces) {
+ quotesAndIndent.Trim(" ", false, true, false);
+ }
+ }
+
+ Append(quotesAndIndent);
+ }
+
+ Append(aCurrentLine.mContent);
+}
+
+void nsPlainTextSerializer::OutputManager::Append(const nsAString& aString) {
+ if (!aString.IsEmpty()) {
+ mOutput.Append(aString);
+ mAtFirstColumn = false;
+ }
+}
+
+void nsPlainTextSerializer::OutputManager::AppendLineBreak() {
+ mOutput.Append(mLineBreak);
+ mAtFirstColumn = true;
+}
+
+uint32_t nsPlainTextSerializer::OutputManager::GetOutputLength() const {
+ return mOutput.Length();
+}
+
+nsPlainTextSerializer::nsPlainTextSerializer()
+ : mFloatingLines(-1),
+ mLineBreakDue(false),
+ kSpace(u" "_ns) // Init of "constant"
+{
+ mHeadLevel = 0;
+ mHasWrittenCiteBlockquote = false;
+ mSpanLevel = 0;
+ for (int32_t i = 0; i <= 6; i++) {
+ mHeaderCounter[i] = 0;
+ }
+
+ // Flow
+ mEmptyLines = 1; // The start of the document is an "empty line" in itself,
+ mInWhitespace = false;
+ mPreFormattedMail = false;
+
+ mPreformattedBlockBoundary = false;
+
+ // initialize the tag stack to zero:
+ // The stack only ever contains pointers to static atoms, so they don't
+ // need refcounting.
+ mTagStack = new const nsAtom*[TagStackSize];
+ mTagStackIndex = 0;
+ mIgnoreAboveIndex = (uint32_t)kNotFound;
+
+ mULCount = 0;
+
+ mIgnoredChildNodeLevel = 0;
+}
+
+nsPlainTextSerializer::~nsPlainTextSerializer() {
+ delete[] mTagStack;
+ NS_WARNING_ASSERTION(mHeadLevel == 0, "Wrong head level!");
+}
+
+nsPlainTextSerializer::Settings::HeaderStrategy
+nsPlainTextSerializer::Settings::Convert(const int32_t aPrefHeaderStrategy) {
+ HeaderStrategy result{HeaderStrategy::kIndentIncreasedWithHeaderLevel};
+
+ switch (aPrefHeaderStrategy) {
+ case 0: {
+ result = HeaderStrategy::kNoIndentation;
+ break;
+ }
+ case 1: {
+ result = HeaderStrategy::kIndentIncreasedWithHeaderLevel;
+ break;
+ }
+ case 2: {
+ result = HeaderStrategy::kNumberHeadingsAndIndentSlightly;
+ break;
+ }
+ default: {
+ NS_WARNING(
+ nsPrintfCString("Header strategy pref contains undefined value: %i",
+ aPrefHeaderStrategy)
+ .get());
+ }
+ }
+
+ return result;
+}
+
+const int32_t kDefaultHeaderStrategy = 1;
+
+void nsPlainTextSerializer::Settings::Init(const int32_t aFlags,
+ const uint32_t aWrapColumn) {
+ mFlags = aFlags;
+
+ if (mFlags & nsIDocumentEncoder::OutputFormatted) {
+ // Get some prefs that controls how we do formatted output
+ mStructs = Preferences::GetBool(PREF_STRUCTS, mStructs);
+
+ int32_t headerStrategy =
+ Preferences::GetInt(PREF_HEADER_STRATEGY, kDefaultHeaderStrategy);
+ mHeaderStrategy = Convert(headerStrategy);
+ }
+
+ mWithRubyAnnotation = StaticPrefs::converter_html2txt_always_include_ruby() ||
+ (mFlags & nsIDocumentEncoder::OutputRubyAnnotation);
+
+ // XXX We should let the caller decide whether to do this or not
+ mFlags &= ~nsIDocumentEncoder::OutputNoFramesContent;
+
+ mWrapColumn = aWrapColumn;
+}
+
+NS_IMETHODIMP
+nsPlainTextSerializer::Init(const uint32_t aFlags, uint32_t aWrapColumn,
+ const Encoding* aEncoding, bool aIsCopying,
+ bool aIsWholeDocument,
+ bool* aNeedsPreformatScanning, nsAString& aOutput) {
+#ifdef DEBUG
+ // Check if the major control flags are set correctly.
+ if (aFlags & nsIDocumentEncoder::OutputFormatFlowed) {
+ NS_ASSERTION(aFlags & nsIDocumentEncoder::OutputFormatted,
+ "If you want format=flowed, you must combine it with "
+ "nsIDocumentEncoder::OutputFormatted");
+ }
+
+ if (aFlags & nsIDocumentEncoder::OutputFormatted) {
+ NS_ASSERTION(
+ !(aFlags & nsIDocumentEncoder::OutputPreformatted),
+ "Can't do formatted and preformatted output at the same time!");
+ }
+#endif
+ MOZ_ASSERT(!(aFlags & nsIDocumentEncoder::OutputFormatDelSp) ||
+ (aFlags & nsIDocumentEncoder::OutputFormatFlowed));
+
+ *aNeedsPreformatScanning = true;
+ mSettings.Init(aFlags, aWrapColumn);
+ mOutputManager.emplace(mSettings.GetFlags(), aOutput);
+
+ if (mSettings.MayWrap() && mSettings.MayBreakLines()) {
+ mLineBreaker = nsContentUtils::LineBreaker();
+ }
+
+ mLineBreakDue = false;
+ mFloatingLines = -1;
+
+ mPreformattedBlockBoundary = false;
+
+ MOZ_ASSERT(mOLStack.IsEmpty());
+
+ return NS_OK;
+}
+
+bool nsPlainTextSerializer::GetLastBool(const nsTArray<bool>& aStack) {
+ uint32_t size = aStack.Length();
+ if (size == 0) {
+ return false;
+ }
+ return aStack.ElementAt(size - 1);
+}
+
+void nsPlainTextSerializer::SetLastBool(nsTArray<bool>& aStack, bool aValue) {
+ uint32_t size = aStack.Length();
+ if (size > 0) {
+ aStack.ElementAt(size - 1) = aValue;
+ } else {
+ NS_ERROR("There is no \"Last\" value");
+ }
+}
+
+void nsPlainTextSerializer::PushBool(nsTArray<bool>& aStack, bool aValue) {
+ aStack.AppendElement(bool(aValue));
+}
+
+bool nsPlainTextSerializer::PopBool(nsTArray<bool>& aStack) {
+ return aStack.Length() ? aStack.PopLastElement() : false;
+}
+
+bool nsPlainTextSerializer::IsIgnorableRubyAnnotation(
+ const nsAtom* aTag) const {
+ if (mSettings.GetWithRubyAnnotation()) {
+ return false;
+ }
+
+ return aTag == nsGkAtoms::rp || aTag == nsGkAtoms::rt ||
+ aTag == nsGkAtoms::rtc;
+}
+
+// Return true if aElement has 'display:none' or if we just don't know.
+static bool IsDisplayNone(Element* aElement) {
+ RefPtr<ComputedStyle> computedStyle =
+ nsComputedDOMStyle::GetComputedStyleNoFlush(aElement, nullptr);
+ return !computedStyle ||
+ computedStyle->StyleDisplay()->mDisplay == StyleDisplay::None;
+}
+
+static bool IsIgnorableScriptOrStyle(Element* aElement) {
+ return aElement->IsAnyOfHTMLElements(nsGkAtoms::script, nsGkAtoms::style) &&
+ IsDisplayNone(aElement);
+}
+
+NS_IMETHODIMP
+nsPlainTextSerializer::AppendText(nsIContent* aText, int32_t aStartOffset,
+ int32_t aEndOffset) {
+ if (mIgnoreAboveIndex != (uint32_t)kNotFound) {
+ return NS_OK;
+ }
+
+ NS_ASSERTION(aStartOffset >= 0, "Negative start offset for text fragment!");
+ if (aStartOffset < 0) return NS_ERROR_INVALID_ARG;
+
+ NS_ENSURE_ARG(aText);
+
+ nsresult rv = NS_OK;
+
+ nsIContent* content = aText;
+ const nsTextFragment* frag;
+ if (!content || !(frag = content->GetText())) {
+ return NS_ERROR_FAILURE;
+ }
+
+ int32_t fragLength = frag->GetLength();
+ int32_t endoffset =
+ (aEndOffset == -1) ? fragLength : std::min(aEndOffset, fragLength);
+ NS_ASSERTION(aStartOffset <= endoffset,
+ "A start offset is beyond the end of the text fragment!");
+
+ int32_t length = endoffset - aStartOffset;
+ if (length <= 0) {
+ return NS_OK;
+ }
+
+ nsAutoString textstr;
+ if (frag->Is2b()) {
+ textstr.Assign(frag->Get2b() + aStartOffset, length);
+ } else {
+ // AssignASCII is for 7-bit character only, so don't use it
+ const char* data = frag->Get1b();
+ CopyASCIItoUTF16(Substring(data + aStartOffset, data + endoffset), textstr);
+ }
+
+ // Mask the text if the text node is in a password field.
+ if (content->HasFlag(NS_MAYBE_MASKED)) {
+ EditorUtils::MaskString(textstr, content->AsText(), 0, aStartOffset);
+ }
+
+ // We have to split the string across newlines
+ // to match parser behavior
+ int32_t start = 0;
+ int32_t offset = textstr.FindCharInSet("\n\r");
+ while (offset != kNotFound) {
+ if (offset > start) {
+ // Pass in the line
+ DoAddText(false, Substring(textstr, start, offset - start));
+ }
+
+ // Pass in a newline
+ DoAddText();
+
+ start = offset + 1;
+ offset = textstr.FindCharInSet("\n\r", start);
+ }
+
+ // Consume the last bit of the string if there's any left
+ if (start < length) {
+ if (start) {
+ DoAddText(false, Substring(textstr, start, length - start));
+ } else {
+ DoAddText(false, textstr);
+ }
+ }
+
+ 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(u"\""_ns);
+ }
+
+ // 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(u"^"_ns);
+ } else if (aTag == nsGkAtoms::sub && mSettings.GetStructs() &&
+ !currentNodeIsConverted) {
+ Write(u"_"_ns);
+ } else if (aTag == nsGkAtoms::code && mSettings.GetStructs() &&
+ !currentNodeIsConverted) {
+ Write(u"|"_ns);
+ } else if ((aTag == nsGkAtoms::strong || aTag == nsGkAtoms::b) &&
+ mSettings.GetStructs() && !currentNodeIsConverted) {
+ Write(u"*"_ns);
+ } else if ((aTag == nsGkAtoms::em || aTag == nsGkAtoms::i) &&
+ mSettings.GetStructs() && !currentNodeIsConverted) {
+ Write(u"/"_ns);
+ } else if (aTag == nsGkAtoms::u && mSettings.GetStructs() &&
+ !currentNodeIsConverted) {
+ Write(u"_"_ns);
+ }
+
+ /* 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(u"\""_ns);
+ } 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(u"|"_ns);
+ } else if ((aTag == nsGkAtoms::strong || aTag == nsGkAtoms::b) &&
+ mSettings.GetStructs() && !currentNodeIsConverted) {
+ Write(u"*"_ns);
+ } else if ((aTag == nsGkAtoms::em || aTag == nsGkAtoms::i) &&
+ mSettings.GetStructs() && !currentNodeIsConverted) {
+ Write(u"/"_ns);
+ } else if (aTag == nsGkAtoms::u && mSettings.GetStructs() &&
+ !currentNodeIsConverted) {
+ Write(u"_"_ns);
+ }
+}
+
+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, u""_ns); }
+
+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 = u" ["_ns + imageDescription + u"] "_ns;
+ }
+
+ 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;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-12 09:13:16 +0000