2039 lines
61 KiB
C++
2039 lines
61 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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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 "nsLWBrkCIID.h"
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#include "nsIServiceManager.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/dom/Element.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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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 = 2; /* Indention of h1, if
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mHeaderStrategy = 1 or = 2.
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Indention of other headers
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is derived from that.
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XXX center h1? */
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static const int32_t kIndentIncrementHeaders = 2; /* If mHeaderStrategy = 1,
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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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static int32_t HeaderLevel(nsIAtom* aTag);
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static int32_t GetUnicharWidth(char16_t ucs);
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static int32_t GetUnicharStringWidth(const char16_t* pwcs, int32_t n);
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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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nsresult
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NS_NewPlainTextSerializer(nsIContentSerializer** aSerializer)
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{
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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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nsPlainTextSerializer::nsPlainTextSerializer()
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: kSpace(NS_LITERAL_STRING(" ")) // Init of "constant"
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{
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mOutputString = nullptr;
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mHeadLevel = 0;
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mAtFirstColumn = true;
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mIndent = 0;
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mCiteQuoteLevel = 0;
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mStructs = true; // will be read from prefs later
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mHeaderStrategy = 1 /*indent increasingly*/; // ditto
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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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// Line breaker
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mWrapColumn = 72; // XXX magic number, we expect someone to reset this
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mCurrentLineWidth = 0;
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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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mStartedOutput = false;
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mPreformattedBlockBoundary = false;
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mWithRubyAnnotation = false; // will be read from pref and flag later
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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 nsIAtom*[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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}
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nsPlainTextSerializer::~nsPlainTextSerializer()
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{
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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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NS_IMPL_ISUPPORTS(nsPlainTextSerializer,
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nsIContentSerializer)
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NS_IMETHODIMP
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nsPlainTextSerializer::Init(uint32_t aFlags, uint32_t aWrapColumn,
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const char* aCharSet, bool aIsCopying,
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bool aIsWholeDocument)
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{
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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(!(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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mFlags = aFlags;
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mWrapColumn = aWrapColumn;
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// Only create a linebreaker if we will handle wrapping.
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if (MayWrap() && MayBreakLines()) {
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mLineBreaker = nsContentUtils::LineBreaker();
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}
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// Set the line break character:
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if ((mFlags & nsIDocumentEncoder::OutputCRLineBreak)
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&& (mFlags & nsIDocumentEncoder::OutputLFLineBreak)) {
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// Windows
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mLineBreak.AssignLiteral("\r\n");
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}
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else if (mFlags & nsIDocumentEncoder::OutputCRLineBreak) {
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// Mac
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mLineBreak.Assign(char16_t('\r'));
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}
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else if (mFlags & nsIDocumentEncoder::OutputLFLineBreak) {
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// Unix/DOM
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mLineBreak.Assign(char16_t('\n'));
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}
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else {
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// Platform/default
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mLineBreak.AssignLiteral(NS_LINEBREAK);
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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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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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mHeaderStrategy =
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Preferences::GetInt(PREF_HEADER_STRATEGY, mHeaderStrategy);
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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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Preferences::GetBool(PREF_ALWAYS_INCLUDE_RUBY, true) ||
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(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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MOZ_ASSERT(mOLStack.IsEmpty());
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return NS_OK;
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}
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bool
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nsPlainTextSerializer::GetLastBool(const nsTArray<bool>& aStack)
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{
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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
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nsPlainTextSerializer::SetLastBool(nsTArray<bool>& aStack, bool aValue)
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{
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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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}
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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
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nsPlainTextSerializer::PushBool(nsTArray<bool>& aStack, bool aValue)
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{
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aStack.AppendElement(bool(aValue));
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}
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bool
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nsPlainTextSerializer::PopBool(nsTArray<bool>& aStack)
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{
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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
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nsPlainTextSerializer::ShouldReplaceContainerWithPlaceholder(nsIAtom* aTag)
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{
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// If nsIDocumentEncoder::OutputNonTextContentAsPlaceholder is set,
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// non-textual container element should be serialized as placeholder
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// character and its child nodes should be ignored. See bug 895239.
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if (!(mFlags & nsIDocumentEncoder::OutputNonTextContentAsPlaceholder)) {
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return false;
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}
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return
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(aTag == nsGkAtoms::audio) ||
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(aTag == nsGkAtoms::canvas) ||
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(aTag == nsGkAtoms::iframe) ||
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(aTag == nsGkAtoms::meter) ||
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(aTag == nsGkAtoms::progress) ||
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(aTag == nsGkAtoms::object) ||
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(aTag == nsGkAtoms::svg) ||
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(aTag == nsGkAtoms::video);
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}
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bool
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nsPlainTextSerializer::IsIgnorableRubyAnnotation(nsIAtom* aTag)
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{
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if (mWithRubyAnnotation) {
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return false;
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}
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return
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aTag == nsGkAtoms::rp ||
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aTag == nsGkAtoms::rt ||
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aTag == nsGkAtoms::rtc;
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}
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NS_IMETHODIMP
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nsPlainTextSerializer::AppendText(nsIContent* aText,
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int32_t aStartOffset,
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int32_t aEndOffset,
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nsAString& aStr)
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{
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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 )
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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 = (aEndOffset == -1) ? fragLength : std::min(aEndOffset, fragLength);
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NS_ASSERTION(aStartOffset <= endoffset, "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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}
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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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mOutputString = &aStr;
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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,
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Substring(textstr, start, offset-start));
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}
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// Pass in a newline
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DoAddText(true, mLineBreak);
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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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}
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else {
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DoAddText(false, textstr);
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}
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}
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mOutputString = nullptr;
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return rv;
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}
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NS_IMETHODIMP
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nsPlainTextSerializer::AppendCDATASection(nsIContent* aCDATASection,
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int32_t aStartOffset,
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int32_t aEndOffset,
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nsAString& aStr)
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{
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return AppendText(aCDATASection, aStartOffset, aEndOffset, aStr);
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}
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NS_IMETHODIMP
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nsPlainTextSerializer::AppendElementStart(Element* aElement,
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Element* aOriginalElement,
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nsAString& aStr)
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{
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NS_ENSURE_ARG(aElement);
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mElement = aElement;
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nsresult rv;
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nsIAtom* id = GetIdForContent(mElement);
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bool isContainer = !FragmentOrElement::IsHTMLVoid(id);
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mOutputString = &aStr;
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if (isContainer) {
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rv = DoOpenContainer(id);
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mPreformatStack.push(IsElementPreformatted(mElement));
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}
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else {
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rv = DoAddLeaf(id);
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}
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mElement = nullptr;
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mOutputString = nullptr;
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if (id == nsGkAtoms::head) {
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++mHeadLevel;
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}
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return rv;
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}
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NS_IMETHODIMP
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nsPlainTextSerializer::AppendElementEnd(Element* aElement,
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Element* aOriginalElement /* unused */,
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nsAString& aStr)
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{
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NS_ENSURE_ARG(aElement);
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mElement = aElement;
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nsresult rv;
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nsIAtom* id = GetIdForContent(mElement);
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bool isContainer = !FragmentOrElement::IsHTMLVoid(id);
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mOutputString = &aStr;
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rv = NS_OK;
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if (isContainer) {
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rv = DoCloseContainer(id);
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mPreformatStack.pop();
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}
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mElement = nullptr;
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mOutputString = nullptr;
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if (id == nsGkAtoms::head) {
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NS_ASSERTION(mHeadLevel != 0,
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"mHeadLevel being decremented below 0");
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--mHeadLevel;
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}
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return rv;
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}
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NS_IMETHODIMP
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nsPlainTextSerializer::Flush(nsAString& aStr)
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{
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mOutputString = &aStr;
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FlushLine();
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mOutputString = nullptr;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsPlainTextSerializer::AppendDocumentStart(nsIDocument *aDocument,
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nsAString& aStr)
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{
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return NS_OK;
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}
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int32_t kOlStackDummyValue = 0;
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nsresult
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nsPlainTextSerializer::DoOpenContainer(nsIAtom* aTag)
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{
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// Check if we need output current node as placeholder character and ignore
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// child nodes.
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if (ShouldReplaceContainerWithPlaceholder(mElement->NodeInfo()->NameAtom())) {
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if (mIgnoredChildNodeLevel == 0) {
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// Serialize current node as placeholder character
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Write(NS_LITERAL_STRING(u"\xFFFC"));
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}
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// Ignore child nodes.
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mIgnoredChildNodeLevel++;
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return NS_OK;
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}
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if (IsIgnorableRubyAnnotation(aTag)) {
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// Ignorable ruby annotation shouldn't be replaced by a placeholder
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// character, neither any of its descendants.
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mIgnoredChildNodeLevel++;
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return NS_OK;
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}
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if (mFlags & nsIDocumentEncoder::OutputForPlainTextClipboardCopy) {
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if (mPreformattedBlockBoundary && DoOutput()) {
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// Should always end a line, but get no more whitespace
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if (mFloatingLines < 0)
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mFloatingLines = 0;
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mLineBreakDue = true;
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}
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mPreformattedBlockBoundary = false;
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}
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if (mFlags & nsIDocumentEncoder::OutputRaw) {
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// Raw means raw. Don't even think about doing anything fancy
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// here like indenting, adding line breaks or any other
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// characters such as list item bullets, quote characters
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// around <q>, etc. I mean it! Don't make me smack you!
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return NS_OK;
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}
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if (mTagStackIndex < TagStackSize) {
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mTagStack[mTagStackIndex++] = aTag;
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}
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if (mIgnoreAboveIndex != (uint32_t)kNotFound) {
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return NS_OK;
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}
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// Reset this so that <blockquote type=cite> doesn't affect the whitespace
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// above random <pre>s below it.
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mHasWrittenCiteBlockquote = mHasWrittenCiteBlockquote &&
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aTag == nsGkAtoms::pre;
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bool isInCiteBlockquote = false;
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// XXX special-case <blockquote type=cite> so that we don't add additional
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// newlines before the text.
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if (aTag == nsGkAtoms::blockquote) {
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nsAutoString value;
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nsresult rv = GetAttributeValue(nsGkAtoms::type, value);
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isInCiteBlockquote = NS_SUCCEEDED(rv) && value.EqualsIgnoreCase("cite");
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}
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if (mLineBreakDue && !isInCiteBlockquote)
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EnsureVerticalSpace(mFloatingLines);
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// Check if this tag's content that should not be output
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if ((aTag == nsGkAtoms::noscript &&
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!(mFlags & nsIDocumentEncoder::OutputNoScriptContent)) ||
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((aTag == nsGkAtoms::iframe || aTag == nsGkAtoms::noframes) &&
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!(mFlags & nsIDocumentEncoder::OutputNoFramesContent))) {
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// Ignore everything that follows the current tag in
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// question until a matching end tag is encountered.
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mIgnoreAboveIndex = mTagStackIndex - 1;
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return NS_OK;
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}
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if (aTag == nsGkAtoms::body) {
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// Try to figure out here whether we have a
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// preformatted style attribute set by Thunderbird.
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//
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// Trigger on the presence of a "pre-wrap" in the
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// style attribute. That's a very simplistic way to do
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// it, but better than nothing.
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// Also set mWrapColumn to the value given there
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// (which arguably we should only do if told to do so).
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nsAutoString style;
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int32_t whitespace;
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if (NS_SUCCEEDED(GetAttributeValue(nsGkAtoms::style, style)) &&
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(kNotFound != (whitespace = style.Find("white-space:")))) {
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|
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if (kNotFound != style.Find("pre-wrap", true, whitespace)) {
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#ifdef DEBUG_preformatted
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printf("Set mPreFormattedMail based on style pre-wrap\n");
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#endif
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mPreFormattedMail = true;
|
|
int32_t widthOffset = style.Find("width:");
|
|
if (widthOffset >= 0) {
|
|
// We have to search for the ch before the semicolon,
|
|
// not for the semicolon itself, because nsString::ToInteger()
|
|
// considers 'c' to be a valid numeric char (even if radix=10)
|
|
// but then gets confused if it sees it next to the number
|
|
// when the radix specified was 10, and returns an error code.
|
|
int32_t semiOffset = style.Find("ch", false, widthOffset+6);
|
|
int32_t length = (semiOffset > 0 ? semiOffset - widthOffset - 6
|
|
: style.Length() - widthOffset);
|
|
nsAutoString widthstr;
|
|
style.Mid(widthstr, widthOffset+6, length);
|
|
nsresult err;
|
|
int32_t col = widthstr.ToInteger(&err);
|
|
|
|
if (NS_SUCCEEDED(err)) {
|
|
mWrapColumn = (uint32_t)col;
|
|
#ifdef DEBUG_preformatted
|
|
printf("Set wrap column to %d based on style\n", mWrapColumn);
|
|
#endif
|
|
}
|
|
}
|
|
}
|
|
else if (kNotFound != style.Find("pre", true, whitespace)) {
|
|
#ifdef DEBUG_preformatted
|
|
printf("Set mPreFormattedMail based on style pre\n");
|
|
#endif
|
|
mPreFormattedMail = true;
|
|
mWrapColumn = 0;
|
|
}
|
|
}
|
|
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 (GetLastBool(mHasWrittenCellsForRow)) {
|
|
// Bypass |Write| so that the TAB isn't compressed away.
|
|
AddToLine(u"\t", 1);
|
|
mInWhitespace = true;
|
|
}
|
|
else 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 {
|
|
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
|
|
mIndent += kIndentSizeList;
|
|
mULCount++;
|
|
}
|
|
else if (aTag == nsGkAtoms::ol) {
|
|
EnsureVerticalSpace(IsInOLOrUL() ? 0 : 1);
|
|
if (mFlags & 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);
|
|
}
|
|
mIndent += kIndentSizeList; // see ul
|
|
}
|
|
else if (aTag == nsGkAtoms::li &&
|
|
(mFlags & 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:
|
|
mInIndentString.AppendInt(mOLStack.LastElement(), 10);
|
|
mOLStack.LastElement()++;
|
|
}
|
|
else {
|
|
mInIndentString.Append(char16_t('#'));
|
|
}
|
|
|
|
mInIndentString.Append(char16_t('.'));
|
|
|
|
}
|
|
else {
|
|
static char bulletCharArray[] = "*o+#";
|
|
uint32_t index = mULCount > 0 ? (mULCount - 1) : 3;
|
|
char bulletChar = bulletCharArray[index % 4];
|
|
mInIndentString.Append(char16_t(bulletChar));
|
|
}
|
|
|
|
mInIndentString.Append(char16_t(' '));
|
|
}
|
|
else if (aTag == nsGkAtoms::dl) {
|
|
EnsureVerticalSpace(1);
|
|
}
|
|
else if (aTag == nsGkAtoms::dt) {
|
|
EnsureVerticalSpace(0);
|
|
}
|
|
else if (aTag == nsGkAtoms::dd) {
|
|
EnsureVerticalSpace(0);
|
|
mIndent += kIndentSizeDD;
|
|
}
|
|
else if (aTag == nsGkAtoms::span) {
|
|
++mSpanLevel;
|
|
}
|
|
else if (aTag == nsGkAtoms::blockquote) {
|
|
// Push
|
|
PushBool(mIsInCiteBlockquote, isInCiteBlockquote);
|
|
if (isInCiteBlockquote) {
|
|
EnsureVerticalSpace(0);
|
|
mCiteQuoteLevel++;
|
|
}
|
|
else {
|
|
EnsureVerticalSpace(1);
|
|
mIndent += 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 (IsElementBlock(mElement)) {
|
|
EnsureVerticalSpace(0);
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////
|
|
if (!(mFlags & nsIDocumentEncoder::OutputFormatted)) {
|
|
return NS_OK;
|
|
}
|
|
//////////////////////////////////////////////////////////////
|
|
// The rest of this routine is formatted output stuff,
|
|
// which we should skip if we're not formatted:
|
|
//////////////////////////////////////////////////////////////
|
|
|
|
// Push on stack
|
|
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 (mHeaderStrategy == 2) { // numbered
|
|
mIndent += 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 (mHeaderStrategy == 1) { // indent increasingly
|
|
mIndent += kIndentSizeHeaders;
|
|
for (int32_t i = HeaderLevel(aTag); i > 1; i--) {
|
|
// for h(x), run x-1 times
|
|
mIndent += kIndentIncrementHeaders;
|
|
}
|
|
}
|
|
}
|
|
else if (aTag == nsGkAtoms::a && !currentNodeIsConverted) {
|
|
nsAutoString url;
|
|
if (NS_SUCCEEDED(GetAttributeValue(nsGkAtoms::href, url))
|
|
&& !url.IsEmpty()) {
|
|
mURL = url;
|
|
}
|
|
}
|
|
else if (aTag == nsGkAtoms::sup && mStructs && !currentNodeIsConverted) {
|
|
Write(NS_LITERAL_STRING("^"));
|
|
}
|
|
else if (aTag == nsGkAtoms::sub && mStructs && !currentNodeIsConverted) {
|
|
Write(NS_LITERAL_STRING("_"));
|
|
}
|
|
else if (aTag == nsGkAtoms::code && mStructs && !currentNodeIsConverted) {
|
|
Write(NS_LITERAL_STRING("|"));
|
|
}
|
|
else if ((aTag == nsGkAtoms::strong || aTag == nsGkAtoms::b)
|
|
&& mStructs && !currentNodeIsConverted) {
|
|
Write(NS_LITERAL_STRING("*"));
|
|
}
|
|
else if ((aTag == nsGkAtoms::em || aTag == nsGkAtoms::i)
|
|
&& mStructs && !currentNodeIsConverted) {
|
|
Write(NS_LITERAL_STRING("/"));
|
|
}
|
|
else if (aTag == nsGkAtoms::u && mStructs && !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;
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult
|
|
nsPlainTextSerializer::DoCloseContainer(nsIAtom* aTag)
|
|
{
|
|
if (ShouldReplaceContainerWithPlaceholder(mElement->NodeInfo()->NameAtom())) {
|
|
mIgnoredChildNodeLevel--;
|
|
return NS_OK;
|
|
}
|
|
if (IsIgnorableRubyAnnotation(aTag)) {
|
|
mIgnoredChildNodeLevel--;
|
|
return NS_OK;
|
|
}
|
|
|
|
if (mFlags & nsIDocumentEncoder::OutputForPlainTextClipboardCopy) {
|
|
if (DoOutput() && IsInPre() && IsElementBlock(mElement)) {
|
|
// If we're closing a preformatted block element, output a line break
|
|
// when we find a new container.
|
|
mPreformattedBlockBoundary = true;
|
|
}
|
|
}
|
|
|
|
if (mFlags & 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. I mean it! Don't make me smack you!
|
|
|
|
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;
|
|
}
|
|
|
|
// 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 (mFlags & nsIDocumentEncoder::OutputFormatted) {
|
|
EnsureVerticalSpace(0);
|
|
}
|
|
else {
|
|
FlushLine();
|
|
}
|
|
// 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)) &&
|
|
(mFlags & 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) {
|
|
FlushLine();
|
|
mIndent -= kIndentSizeList;
|
|
--mULCount;
|
|
if (!IsInOLOrUL()) {
|
|
mFloatingLines = 1;
|
|
mLineBreakDue = true;
|
|
}
|
|
}
|
|
else if (aTag == nsGkAtoms::ol) {
|
|
FlushLine(); // Doing this after decreasing OLStackIndex would be wrong.
|
|
mIndent -= kIndentSizeList;
|
|
NS_ASSERTION(!mOLStack.IsEmpty(), "Wrong OLStack level!");
|
|
mOLStack.RemoveElementAt(mOLStack.Length() - 1);
|
|
if (!IsInOLOrUL()) {
|
|
mFloatingLines = 1;
|
|
mLineBreakDue = true;
|
|
}
|
|
}
|
|
else if (aTag == nsGkAtoms::dl) {
|
|
mFloatingLines = 1;
|
|
mLineBreakDue = true;
|
|
}
|
|
else if (aTag == nsGkAtoms::dd) {
|
|
FlushLine();
|
|
mIndent -= 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) {
|
|
FlushLine(); // Is this needed?
|
|
|
|
// Pop
|
|
bool isInCiteBlockquote = PopBool(mIsInCiteBlockquote);
|
|
|
|
if (isInCiteBlockquote) {
|
|
NS_ASSERTION(mCiteQuoteLevel, "CiteQuote level will be negative!");
|
|
mCiteQuoteLevel--;
|
|
mFloatingLines = 0;
|
|
mHasWrittenCiteBlockquote = true;
|
|
}
|
|
else {
|
|
mIndent -= kTabSize;
|
|
mFloatingLines = 1;
|
|
}
|
|
mLineBreakDue = true;
|
|
}
|
|
else if (aTag == nsGkAtoms::q) {
|
|
Write(NS_LITERAL_STRING("\""));
|
|
}
|
|
else if (IsElementBlock(mElement) && aTag != nsGkAtoms::script) {
|
|
// 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 (mFlags & nsIDocumentEncoder::OutputFormatted)
|
|
EnsureVerticalSpace(1);
|
|
else {
|
|
if (mFloatingLines < 0)
|
|
mFloatingLines = 0;
|
|
mLineBreakDue = true;
|
|
}
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////
|
|
if (!(mFlags & nsIDocumentEncoder::OutputFormatted)) {
|
|
return NS_OK;
|
|
}
|
|
//////////////////////////////////////////////////////////////
|
|
// The rest of this routine is formatted output stuff,
|
|
// which we should skip if we're not formatted:
|
|
//////////////////////////////////////////////////////////////
|
|
|
|
// Pop the currentConverted stack
|
|
bool currentNodeIsConverted = IsCurrentNodeConverted();
|
|
|
|
if (aTag == nsGkAtoms::h1 || aTag == nsGkAtoms::h2 ||
|
|
aTag == nsGkAtoms::h3 || aTag == nsGkAtoms::h4 ||
|
|
aTag == nsGkAtoms::h5 || aTag == nsGkAtoms::h6) {
|
|
|
|
if (mHeaderStrategy) { /*numbered or indent increasingly*/
|
|
mIndent -= kIndentSizeHeaders;
|
|
}
|
|
if (mHeaderStrategy == 1 /*indent increasingly*/ ) {
|
|
for (int32_t i = HeaderLevel(aTag); i > 1; i--) {
|
|
// for h(x), run x-1 times
|
|
mIndent -= kIndentIncrementHeaders;
|
|
}
|
|
}
|
|
EnsureVerticalSpace(1);
|
|
}
|
|
else if (aTag == nsGkAtoms::a && !currentNodeIsConverted && !mURL.IsEmpty()) {
|
|
nsAutoString temp;
|
|
temp.AssignLiteral(" <");
|
|
temp += mURL;
|
|
temp.Append(char16_t('>'));
|
|
Write(temp);
|
|
mURL.Truncate();
|
|
}
|
|
else if ((aTag == nsGkAtoms::sup || aTag == nsGkAtoms::sub)
|
|
&& mStructs && !currentNodeIsConverted) {
|
|
Write(kSpace);
|
|
}
|
|
else if (aTag == nsGkAtoms::code && mStructs && !currentNodeIsConverted) {
|
|
Write(NS_LITERAL_STRING("|"));
|
|
}
|
|
else if ((aTag == nsGkAtoms::strong || aTag == nsGkAtoms::b)
|
|
&& mStructs && !currentNodeIsConverted) {
|
|
Write(NS_LITERAL_STRING("*"));
|
|
}
|
|
else if ((aTag == nsGkAtoms::em || aTag == nsGkAtoms::i)
|
|
&& mStructs && !currentNodeIsConverted) {
|
|
Write(NS_LITERAL_STRING("/"));
|
|
}
|
|
else if (aTag == nsGkAtoms::u && mStructs && !currentNodeIsConverted) {
|
|
Write(NS_LITERAL_STRING("_"));
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
bool
|
|
nsPlainTextSerializer::MustSuppressLeaf()
|
|
{
|
|
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;
|
|
}
|
|
|
|
if (mTagStackIndex > 0 &&
|
|
(mTagStack[mTagStackIndex-1] == nsGkAtoms::script ||
|
|
mTagStack[mTagStackIndex-1] == nsGkAtoms::style)) {
|
|
// Don't output the contents of <script> or <style> tags;
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
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 ((mFlags & nsIDocumentEncoder::OutputPreformatted) ||
|
|
(mPreFormattedMail && !mWrapColumn) ||
|
|
IsInPre()) {
|
|
EnsureVerticalSpace(mEmptyLines+1);
|
|
}
|
|
else if (!mInWhitespace) {
|
|
Write(kSpace);
|
|
mInWhitespace = true;
|
|
}
|
|
return;
|
|
}
|
|
|
|
/* Check, if we are in a link (symbolized with mURL containing the URL)
|
|
and the text is equal to the URL. In that case we don't want to output
|
|
the URL twice so we scrap the text in mURL. */
|
|
if (!mURL.IsEmpty() && mURL.Equals(aText)) {
|
|
mURL.Truncate();
|
|
}
|
|
Write(aText);
|
|
}
|
|
|
|
nsresult
|
|
nsPlainTextSerializer::DoAddLeaf(nsIAtom* aTag)
|
|
{
|
|
mPreformattedBlockBoundary = false;
|
|
|
|
// If we don't want any output, just return
|
|
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.
|
|
nsAutoString tagAttr;
|
|
if (NS_FAILED(GetAttributeValue(nsGkAtoms::type, tagAttr))
|
|
|| !tagAttr.EqualsLiteral("_moz")) {
|
|
EnsureVerticalSpace(mEmptyLines+1);
|
|
}
|
|
}
|
|
else if (aTag == nsGkAtoms::hr &&
|
|
(mFlags & nsIDocumentEncoder::OutputFormatted)) {
|
|
EnsureVerticalSpace(0);
|
|
|
|
// Make a line of dashes as wide as the wrap width
|
|
// XXX honoring percentage would be nice
|
|
nsAutoString line;
|
|
uint32_t width = (mWrapColumn > 0 ? mWrapColumn : 25);
|
|
while (line.Length() < width) {
|
|
line.Append(char16_t('-'));
|
|
}
|
|
Write(line);
|
|
|
|
EnsureVerticalSpace(0);
|
|
}
|
|
else if (mFlags & nsIDocumentEncoder::OutputNonTextContentAsPlaceholder) {
|
|
Write(NS_LITERAL_STRING(u"\xFFFC"));
|
|
}
|
|
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 |noOfRows| empty lines
|
|
*
|
|
* noOfRows = -1 : Being in the middle of some line of text
|
|
* noOfRows = 0 : Being at the start of a line
|
|
* noOfRows = n>0 : Having n empty lines before the current line.
|
|
*/
|
|
void
|
|
nsPlainTextSerializer::EnsureVerticalSpace(int32_t noOfRows)
|
|
{
|
|
// 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 (noOfRows >= 0 && !mInIndentString.IsEmpty()) {
|
|
EndLine(false);
|
|
mInWhitespace = true;
|
|
}
|
|
|
|
while(mEmptyLines < noOfRows) {
|
|
EndLine(false);
|
|
mInWhitespace = true;
|
|
}
|
|
mLineBreakDue = false;
|
|
mFloatingLines = -1;
|
|
}
|
|
|
|
/**
|
|
* This empties the current line cache without adding a NEWLINE.
|
|
* Should not be used if line wrapping is of importance since
|
|
* this function destroys the cache information.
|
|
*
|
|
* It will also write indentation and quotes if we believe us to be
|
|
* at the start of the line.
|
|
*/
|
|
void
|
|
nsPlainTextSerializer::FlushLine()
|
|
{
|
|
if (!mCurrentLine.IsEmpty()) {
|
|
if (mAtFirstColumn) {
|
|
OutputQuotesAndIndent(); // XXX: Should we always do this? Bug?
|
|
}
|
|
|
|
Output(mCurrentLine);
|
|
mAtFirstColumn = mAtFirstColumn && mCurrentLine.IsEmpty();
|
|
mCurrentLine.Truncate();
|
|
mCurrentLineWidth = 0;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Prints the text to output to our current output device (the string mOutputString).
|
|
* The only logic here is to replace non breaking spaces with a normal space since
|
|
* most (all?) receivers of the result won't understand the nbsp and even be
|
|
* confused by it.
|
|
*/
|
|
void
|
|
nsPlainTextSerializer::Output(nsString& aString)
|
|
{
|
|
if (!aString.IsEmpty()) {
|
|
mStartedOutput = true;
|
|
}
|
|
|
|
if (!(mFlags & nsIDocumentEncoder::OutputPersistNBSP)) {
|
|
// First, replace all nbsp characters with spaces,
|
|
// which the unicode encoder won't do for us.
|
|
aString.ReplaceChar(kNBSP, kSPACE);
|
|
}
|
|
mOutputString->Append(aString);
|
|
}
|
|
|
|
static bool
|
|
IsSpaceStuffable(const char16_t *s)
|
|
{
|
|
if (s[0] == '>' || s[0] == ' ' || s[0] == kNBSP ||
|
|
nsCRT::strncmp(s, u"From ", 5) == 0)
|
|
return true;
|
|
else
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* 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)
|
|
{
|
|
uint32_t prefixwidth = (mCiteQuoteLevel > 0 ? mCiteQuoteLevel + 1:0)+mIndent;
|
|
|
|
if (mLineBreakDue)
|
|
EnsureVerticalSpace(mFloatingLines);
|
|
|
|
int32_t linelength = mCurrentLine.Length();
|
|
if (0 == linelength) {
|
|
if (0 == aLineFragmentLength) {
|
|
// Nothing at all. Are you kidding me?
|
|
return;
|
|
}
|
|
|
|
if (mFlags & nsIDocumentEncoder::OutputFormatFlowed) {
|
|
if (IsSpaceStuffable(aLineFragment)
|
|
&& mCiteQuoteLevel == 0 // We space-stuff quoted lines anyway
|
|
)
|
|
{
|
|
// Space stuffing a la RFC 2646 (format=flowed).
|
|
mCurrentLine.Append(char16_t(' '));
|
|
|
|
if (MayWrap()) {
|
|
mCurrentLineWidth += GetUnicharWidth(' ');
|
|
#ifdef DEBUG_wrapping
|
|
NS_ASSERTION(GetUnicharStringWidth(mCurrentLine.get(),
|
|
mCurrentLine.Length()) ==
|
|
(int32_t)mCurrentLineWidth,
|
|
"mCurrentLineWidth and reality out of sync!");
|
|
#endif
|
|
}
|
|
}
|
|
}
|
|
mEmptyLines=-1;
|
|
}
|
|
|
|
mCurrentLine.Append(aLineFragment, aLineFragmentLength);
|
|
if (MayWrap()) {
|
|
mCurrentLineWidth += GetUnicharStringWidth(aLineFragment,
|
|
aLineFragmentLength);
|
|
#ifdef DEBUG_wrapping
|
|
NS_ASSERTION(GetUnicharstringWidth(mCurrentLine.get(),
|
|
mCurrentLine.Length()) ==
|
|
(int32_t)mCurrentLineWidth,
|
|
"mCurrentLineWidth and reality out of sync!");
|
|
#endif
|
|
}
|
|
|
|
linelength = mCurrentLine.Length();
|
|
|
|
// Wrap?
|
|
if (MayWrap())
|
|
{
|
|
#ifdef DEBUG_wrapping
|
|
NS_ASSERTION(GetUnicharstringWidth(mCurrentLine.get(),
|
|
mCurrentLine.Length()) ==
|
|
(int32_t)mCurrentLineWidth,
|
|
"mCurrentLineWidth and reality out of sync!");
|
|
#endif
|
|
// 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.
|
|
uint32_t bonuswidth = (mWrapColumn > 20) ? 4 : 0;
|
|
|
|
// XXX: Should calculate prefixwidth with GetUnicharStringWidth
|
|
while(mCurrentLineWidth+prefixwidth > mWrapColumn+bonuswidth) {
|
|
// We go from the end removing one letter at a time until
|
|
// we have a reasonable width
|
|
int32_t goodSpace = mCurrentLine.Length();
|
|
uint32_t width = mCurrentLineWidth;
|
|
while(goodSpace > 0 && (width+prefixwidth > mWrapColumn)) {
|
|
goodSpace--;
|
|
width -= GetUnicharWidth(mCurrentLine[goodSpace]);
|
|
}
|
|
|
|
goodSpace++;
|
|
|
|
if (mLineBreaker) {
|
|
goodSpace = mLineBreaker->Prev(mCurrentLine.get(),
|
|
mCurrentLine.Length(), goodSpace);
|
|
if (goodSpace != NS_LINEBREAKER_NEED_MORE_TEXT &&
|
|
nsCRT::IsAsciiSpace(mCurrentLine.CharAt(goodSpace-1))) {
|
|
--goodSpace; // adjust the position since line breaker returns a position next to space
|
|
}
|
|
}
|
|
// fallback if the line breaker is unavailable or failed
|
|
if (!mLineBreaker) {
|
|
if (mCurrentLine.IsEmpty() || mWrapColumn < prefixwidth) {
|
|
goodSpace = NS_LINEBREAKER_NEED_MORE_TEXT;
|
|
} else {
|
|
goodSpace = std::min(mWrapColumn - prefixwidth, mCurrentLine.Length() - 1);
|
|
while (goodSpace >= 0 &&
|
|
!nsCRT::IsAsciiSpace(mCurrentLine.CharAt(goodSpace))) {
|
|
goodSpace--;
|
|
}
|
|
}
|
|
}
|
|
|
|
nsAutoString restOfLine;
|
|
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>mWrapColumn+1)?1:mWrapColumn-prefixwidth+1;
|
|
if (mLineBreaker) {
|
|
if ((uint32_t)goodSpace < mCurrentLine.Length())
|
|
goodSpace = mLineBreaker->Next(mCurrentLine.get(),
|
|
mCurrentLine.Length(), goodSpace);
|
|
if (goodSpace == NS_LINEBREAKER_NEED_MORE_TEXT)
|
|
goodSpace = mCurrentLine.Length();
|
|
}
|
|
// fallback if the line breaker is unavailable or failed
|
|
if (!mLineBreaker) {
|
|
goodSpace=(prefixwidth>mWrapColumn)?1:mWrapColumn-prefixwidth;
|
|
while (goodSpace < linelength &&
|
|
!nsCRT::IsAsciiSpace(mCurrentLine.CharAt(goodSpace))) {
|
|
goodSpace++;
|
|
}
|
|
}
|
|
}
|
|
|
|
if ((goodSpace < linelength) && (goodSpace > 0)) {
|
|
// Found a place to break
|
|
|
|
// -1 (trim a char at the break position)
|
|
// only if the line break was a space.
|
|
if (nsCRT::IsAsciiSpace(mCurrentLine.CharAt(goodSpace))) {
|
|
mCurrentLine.Right(restOfLine, linelength-goodSpace-1);
|
|
}
|
|
else {
|
|
mCurrentLine.Right(restOfLine, linelength-goodSpace);
|
|
}
|
|
// if breaker was U+0020, it has to consider for delsp=yes support
|
|
bool breakBySpace = mCurrentLine.CharAt(goodSpace) == ' ';
|
|
mCurrentLine.Truncate(goodSpace);
|
|
EndLine(true, breakBySpace);
|
|
mCurrentLine.Truncate();
|
|
// Space stuff new line?
|
|
if (mFlags & nsIDocumentEncoder::OutputFormatFlowed) {
|
|
if (!restOfLine.IsEmpty() && IsSpaceStuffable(restOfLine.get())
|
|
&& mCiteQuoteLevel == 0 // We space-stuff quoted lines anyway
|
|
)
|
|
{
|
|
// Space stuffing a la RFC 2646 (format=flowed).
|
|
mCurrentLine.Append(char16_t(' '));
|
|
//XXX doesn't seem to work correctly for ' '
|
|
}
|
|
}
|
|
mCurrentLine.Append(restOfLine);
|
|
mCurrentLineWidth = GetUnicharStringWidth(mCurrentLine.get(),
|
|
mCurrentLine.Length());
|
|
linelength = mCurrentLine.Length();
|
|
mEmptyLines = -1;
|
|
}
|
|
else {
|
|
// Nothing to do. Hopefully we get more data later
|
|
// to use for a place to break line
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
// No wrapping.
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Outputs the contents of mCurrentLine, 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)
|
|
{
|
|
uint32_t currentlinelength = mCurrentLine.Length();
|
|
|
|
if (aSoftlinebreak && 0 == currentlinelength) {
|
|
// 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 (!(mFlags & nsIDocumentEncoder::OutputPreformatted) &&
|
|
!(mFlags & nsIDocumentEncoder::OutputDontRemoveLineEndingSpaces) &&
|
|
(aSoftlinebreak ||
|
|
!(mCurrentLine.EqualsLiteral("-- ") || mCurrentLine.EqualsLiteral("- -- ")))) {
|
|
// Remove spaces from the end of the line.
|
|
while(currentlinelength > 0 &&
|
|
mCurrentLine[currentlinelength-1] == ' ') {
|
|
--currentlinelength;
|
|
}
|
|
mCurrentLine.SetLength(currentlinelength);
|
|
}
|
|
|
|
if (aSoftlinebreak &&
|
|
(mFlags & nsIDocumentEncoder::OutputFormatFlowed) &&
|
|
(mIndent == 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 ((mFlags & nsIDocumentEncoder::OutputFormatDelSp) && aBreakBySpace)
|
|
mCurrentLine.AppendLiteral(" ");
|
|
else
|
|
mCurrentLine.Append(char16_t(' '));
|
|
}
|
|
|
|
if (aSoftlinebreak) {
|
|
mEmptyLines=0;
|
|
}
|
|
else {
|
|
// Hard break
|
|
if (!mCurrentLine.IsEmpty() || !mInIndentString.IsEmpty()) {
|
|
mEmptyLines=-1;
|
|
}
|
|
|
|
mEmptyLines++;
|
|
}
|
|
|
|
if (mAtFirstColumn) {
|
|
// 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.
|
|
bool stripTrailingSpaces = mCurrentLine.IsEmpty();
|
|
OutputQuotesAndIndent(stripTrailingSpaces);
|
|
}
|
|
|
|
mCurrentLine.Append(mLineBreak);
|
|
Output(mCurrentLine);
|
|
mCurrentLine.Truncate();
|
|
mCurrentLineWidth = 0;
|
|
mAtFirstColumn=true;
|
|
mInWhitespace=true;
|
|
mLineBreakDue = false;
|
|
mFloatingLines = -1;
|
|
}
|
|
|
|
|
|
/**
|
|
* Outputs the calculated and stored indent and text in the indentation. That is
|
|
* quote chars and numbers for numbered lists and such. It will also reset any
|
|
* stored text to put in the indentation after using it.
|
|
*/
|
|
void
|
|
nsPlainTextSerializer::OutputQuotesAndIndent(bool stripTrailingSpaces /* = false */)
|
|
{
|
|
nsAutoString stringToOutput;
|
|
|
|
// 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 (!mCurrentLine.IsEmpty()) {
|
|
/* Better don't output a space here, if the line is empty,
|
|
in case a receiving f=f-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(' '));
|
|
}
|
|
stringToOutput = quotes;
|
|
mAtFirstColumn = false;
|
|
}
|
|
|
|
// Indent if necessary
|
|
int32_t indentwidth = mIndent - mInIndentString.Length();
|
|
if (indentwidth > 0
|
|
&& (!mCurrentLine.IsEmpty() || !mInIndentString.IsEmpty())
|
|
// Don't make empty lines look flowed
|
|
) {
|
|
nsAutoString spaces;
|
|
for (int i=0; i < indentwidth; ++i)
|
|
spaces.Append(char16_t(' '));
|
|
stringToOutput += spaces;
|
|
mAtFirstColumn = false;
|
|
}
|
|
|
|
if (!mInIndentString.IsEmpty()) {
|
|
stringToOutput += mInIndentString;
|
|
mAtFirstColumn = false;
|
|
mInIndentString.Truncate();
|
|
}
|
|
|
|
if (stripTrailingSpaces) {
|
|
int32_t lineLength = stringToOutput.Length();
|
|
while(lineLength > 0 &&
|
|
' ' == stringToOutput[lineLength-1]) {
|
|
--lineLength;
|
|
}
|
|
stringToOutput.SetLength(lineLength);
|
|
}
|
|
|
|
if (!stringToOutput.IsEmpty()) {
|
|
Output(stringToOutput);
|
|
}
|
|
|
|
}
|
|
|
|
/**
|
|
* 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(), mWrapColumn);
|
|
#endif
|
|
|
|
int32_t bol = 0;
|
|
int32_t newline;
|
|
|
|
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 (mFlags & nsIDocumentEncoder::OutputFormatFlowed) {
|
|
for (int32_t i = totLen-1; i >= 0; i--) {
|
|
char16_t c = str[i];
|
|
if ('\n' == c || '\r' == c || ' ' == c || '\t' == c)
|
|
continue;
|
|
if (kNBSP == c)
|
|
str.Replace(i, 1, ' ');
|
|
else
|
|
break;
|
|
}
|
|
}
|
|
|
|
// 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 && !mWrapColumn) || (IsInPre() && !mPreFormattedMail)
|
|
|| (mSpanLevel > 0 && mEmptyLines >= 0 && IsQuotedLine(str))) {
|
|
// No intelligent wrapping.
|
|
|
|
// This mustn't be mixed with intelligent wrapping without clearing
|
|
// the mCurrentLine buffer before!!!
|
|
NS_ASSERTION(mCurrentLine.IsEmpty() || (IsInPre() && !mPreFormattedMail),
|
|
"Mixed wrapping data and nonwrapping data on the same line");
|
|
if (!mCurrentLine.IsEmpty()) {
|
|
FlushLine();
|
|
}
|
|
|
|
// Put the mail quote "> " chars in, if appropriate.
|
|
// Have to put it in before every line.
|
|
while(bol<totLen) {
|
|
bool outputQuotes = mAtFirstColumn;
|
|
bool atFirstColumn = mAtFirstColumn;
|
|
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; str.BeginReading(iter);
|
|
nsAString::const_iterator done_searching; str.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(str, bol, totLen - bol));
|
|
if (!stringpart.IsEmpty()) {
|
|
char16_t lastchar = stringpart[stringpart.Length()-1];
|
|
if ((lastchar == '\t') || (lastchar == ' ') ||
|
|
(lastchar == '\r') ||(lastchar == '\n')) {
|
|
mInWhitespace = true;
|
|
}
|
|
else {
|
|
mInWhitespace = false;
|
|
}
|
|
}
|
|
mEmptyLines=-1;
|
|
atFirstColumn = mAtFirstColumn && (totLen-bol)==0;
|
|
bol = totLen;
|
|
}
|
|
else {
|
|
// There is a newline
|
|
stringpart.Assign(Substring(str, bol, newline-bol));
|
|
mInWhitespace = true;
|
|
outputLineBreak = true;
|
|
mEmptyLines=0;
|
|
atFirstColumn = true;
|
|
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++;
|
|
}
|
|
}
|
|
|
|
mCurrentLine.Truncate();
|
|
if (mFlags & nsIDocumentEncoder::OutputFormatFlowed) {
|
|
if ((outputLineBreak || !spacesOnly) && // bugs 261467,125928
|
|
!IsQuotedLine(stringpart) &&
|
|
!stringpart.EqualsLiteral("-- ") &&
|
|
!stringpart.EqualsLiteral("- -- "))
|
|
stringpart.Trim(" ", false, true, true);
|
|
if (IsSpaceStuffable(stringpart.get()) && !IsQuotedLine(stringpart))
|
|
mCurrentLine.Append(char16_t(' '));
|
|
}
|
|
mCurrentLine.Append(stringpart);
|
|
|
|
if (outputQuotes) {
|
|
// Note: this call messes with mAtFirstColumn
|
|
OutputQuotesAndIndent();
|
|
}
|
|
|
|
Output(mCurrentLine);
|
|
if (outputLineBreak) {
|
|
Output(mLineBreak);
|
|
}
|
|
mAtFirstColumn = atFirstColumn;
|
|
}
|
|
|
|
// Reset mCurrentLine.
|
|
mCurrentLine.Truncate();
|
|
|
|
#ifdef DEBUG_wrapping
|
|
printf("No wrapping: newline is %d, totLen is %d\n",
|
|
newline, totLen);
|
|
#endif
|
|
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;
|
|
|
|
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 &&
|
|
!(mFlags & 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 || (mFlags & 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(nsIAtom* aName,
|
|
nsString& aValueRet)
|
|
{
|
|
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()
|
|
{
|
|
nsAutoString value;
|
|
nsresult rv = GetAttributeValue(nsGkAtoms::_class, value);
|
|
return (NS_SUCCEEDED(rv) &&
|
|
(value.EqualsIgnoreCase("moz-txt", 7) ||
|
|
value.EqualsIgnoreCase("\"moz-txt", 8)));
|
|
}
|
|
|
|
|
|
// static
|
|
nsIAtom*
|
|
nsPlainTextSerializer::GetIdForContent(nsIContent* aContent)
|
|
{
|
|
if (!aContent->IsHTMLElement()) {
|
|
return nullptr;
|
|
}
|
|
|
|
nsIAtom* localName = aContent->NodeInfo()->NameAtom();
|
|
return localName->IsStaticAtom() ? localName : nullptr;
|
|
}
|
|
|
|
bool
|
|
nsPlainTextSerializer::IsInPre()
|
|
{
|
|
return !mPreformatStack.empty() && mPreformatStack.top();
|
|
}
|
|
|
|
bool
|
|
nsPlainTextSerializer::IsElementPreformatted(Element* aElement)
|
|
{
|
|
RefPtr<nsStyleContext> styleContext =
|
|
nsComputedDOMStyle::GetStyleContextForElementNoFlush(aElement, nullptr,
|
|
nullptr);
|
|
if (styleContext) {
|
|
const nsStyleText* textStyle = styleContext->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::IsElementBlock(Element* aElement)
|
|
{
|
|
RefPtr<nsStyleContext> styleContext =
|
|
nsComputedDOMStyle::GetStyleContextForElementNoFlush(aElement, nullptr,
|
|
nullptr);
|
|
if (styleContext) {
|
|
const nsStyleDisplay* displayStyle = styleContext->StyleDisplay();
|
|
return displayStyle->IsBlockOutsideStyle();
|
|
}
|
|
// Fall back to looking at the tag, in case there is no style information.
|
|
return nsContentUtils::IsHTMLBlock(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()
|
|
{
|
|
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(nsIAtom* 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 char16_t* pwcs, int32_t n)
|
|
{
|
|
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;
|
|
}
|