зеркало из https://github.com/mozilla/gecko-dev.git
2104 строки
68 KiB
C++
2104 строки
68 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/*
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* Object that can be used to serialize selections, ranges, or nodes
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* to strings in a gazillion different ways.
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*/
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#include "nsIDocumentEncoder.h"
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#include <utility>
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#include "nscore.h"
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#include "nsISupports.h"
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#include "mozilla/dom/Document.h"
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#include "nsCOMPtr.h"
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#include "nsIContentSerializer.h"
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#include "mozilla/Encoding.h"
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#include "nsIOutputStream.h"
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#include "nsRange.h"
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#include "nsGkAtoms.h"
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#include "nsHTMLDocument.h"
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#include "nsIContent.h"
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#include "nsIScriptContext.h"
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#include "nsIScriptGlobalObject.h"
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#include "mozilla/dom/Selection.h"
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#include "nsContentUtils.h"
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#include "nsElementTable.h"
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#include "nsUnicharUtils.h"
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#include "nsReadableUtils.h"
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#include "nsTArray.h"
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#include "nsIFrame.h"
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#include "nsStringBuffer.h"
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#include "mozilla/dom/Comment.h"
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#include "mozilla/dom/DocumentType.h"
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#include "mozilla/dom/Element.h"
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#include "mozilla/dom/HTMLBRElement.h"
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#include "mozilla/dom/ProcessingInstruction.h"
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#include "mozilla/dom/ShadowRoot.h"
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#include "mozilla/dom/Text.h"
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#include "nsLayoutUtils.h"
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#include "mozilla/Maybe.h"
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#include "mozilla/ScopeExit.h"
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#include "mozilla/UniquePtr.h"
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using namespace mozilla;
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using namespace mozilla::dom;
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enum nsRangeIterationDirection { kDirectionOut = -1, kDirectionIn = 1 };
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class TextStreamer {
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public:
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/**
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* @param aStream Will be kept alive by the TextStreamer.
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* @param aUnicodeEncoder Needs to be non-nullptr.
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*/
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TextStreamer(nsIOutputStream& aStream, UniquePtr<Encoder> aUnicodeEncoder,
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bool aIsPlainText, nsAString& aOutputBuffer);
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/**
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* String will be truncated if it is written to stream.
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*/
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nsresult FlushIfStringLongEnough();
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/**
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* String will be truncated.
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*/
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nsresult ForceFlush();
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private:
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const static uint32_t kMaxLengthBeforeFlush = 1024;
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const static uint32_t kEncoderBufferSizeInBytes = 4096;
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nsresult EncodeAndWrite();
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nsresult EncodeAndWriteAndTruncate();
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const nsCOMPtr<nsIOutputStream> mStream;
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const UniquePtr<Encoder> mUnicodeEncoder;
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const bool mIsPlainText;
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nsAString& mOutputBuffer;
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};
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TextStreamer::TextStreamer(nsIOutputStream& aStream,
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UniquePtr<Encoder> aUnicodeEncoder,
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bool aIsPlainText, nsAString& aOutputBuffer)
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: mStream{&aStream},
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mUnicodeEncoder(std::move(aUnicodeEncoder)),
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mIsPlainText(aIsPlainText),
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mOutputBuffer(aOutputBuffer) {
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MOZ_ASSERT(mUnicodeEncoder);
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}
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nsresult TextStreamer::FlushIfStringLongEnough() {
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nsresult rv = NS_OK;
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if (mOutputBuffer.Length() > kMaxLengthBeforeFlush) {
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rv = EncodeAndWriteAndTruncate();
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}
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return rv;
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}
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nsresult TextStreamer::ForceFlush() { return EncodeAndWriteAndTruncate(); }
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nsresult TextStreamer::EncodeAndWrite() {
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if (mOutputBuffer.IsEmpty()) {
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return NS_OK;
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}
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uint8_t buffer[kEncoderBufferSizeInBytes];
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auto src = Span(mOutputBuffer);
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auto bufferSpan = Span(buffer);
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// Reserve space for terminator
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auto dst = bufferSpan.To(bufferSpan.Length() - 1);
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for (;;) {
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uint32_t result;
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size_t read;
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size_t written;
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bool hadErrors;
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if (mIsPlainText) {
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Tie(result, read, written) =
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mUnicodeEncoder->EncodeFromUTF16WithoutReplacement(src, dst, false);
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if (result != kInputEmpty && result != kOutputFull) {
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// There's always room for one byte in the case of
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// an unmappable character, because otherwise
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// we'd have gotten `kOutputFull`.
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dst[written++] = '?';
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}
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} else {
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Tie(result, read, written, hadErrors) =
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mUnicodeEncoder->EncodeFromUTF16(src, dst, false);
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}
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Unused << hadErrors;
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src = src.From(read);
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// Sadly, we still have test cases that implement nsIOutputStream in JS, so
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// the buffer needs to be zero-terminated for XPConnect to do its thing.
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// See bug 170416.
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bufferSpan[written] = 0;
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uint32_t streamWritten;
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nsresult rv = mStream->Write(reinterpret_cast<char*>(dst.Elements()),
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written, &streamWritten);
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if (NS_FAILED(rv)) {
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return rv;
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}
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if (result == kInputEmpty) {
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return NS_OK;
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}
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}
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}
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nsresult TextStreamer::EncodeAndWriteAndTruncate() {
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const nsresult rv = EncodeAndWrite();
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mOutputBuffer.Truncate();
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return rv;
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}
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/**
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* The scope may be limited to either a selection, range, or node.
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*/
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class EncodingScope {
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public:
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/**
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* @return true, iff the scope is limited to a selection, range or node.
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*/
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bool IsLimited() const;
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RefPtr<Selection> mSelection;
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RefPtr<nsRange> mRange;
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nsCOMPtr<nsINode> mNode;
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bool mNodeIsContainer = false;
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};
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bool EncodingScope::IsLimited() const { return mSelection || mRange || mNode; }
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struct RangeBoundariesInclusiveAncestorsAndOffsets {
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/**
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* https://dom.spec.whatwg.org/#concept-tree-inclusive-ancestor.
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*/
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using InclusiveAncestors = AutoTArray<nsIContent*, 8>;
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/**
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* https://dom.spec.whatwg.org/#concept-tree-inclusive-ancestor.
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*/
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using InclusiveAncestorsOffsets = AutoTArray<int32_t, 8>;
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// The first node is the range's boundary node, the following ones the
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// ancestors.
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InclusiveAncestors mInclusiveAncestorsOfStart;
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// The first offset represents where at the boundary node the range starts.
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// Each other offset is the index of the child relative to its parent.
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InclusiveAncestorsOffsets mInclusiveAncestorsOffsetsOfStart;
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// The first node is the range's boundary node, the following one the
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// ancestors.
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InclusiveAncestors mInclusiveAncestorsOfEnd;
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// The first offset represents where at the boundary node the range ends.
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// Each other offset is the index of the child relative to its parent.
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InclusiveAncestorsOffsets mInclusiveAncestorsOffsetsOfEnd;
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};
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struct ContextInfoDepth {
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uint32_t mStart = 0;
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uint32_t mEnd = 0;
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};
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class nsDocumentEncoder : public nsIDocumentEncoder {
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protected:
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class RangeNodeContext {
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public:
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virtual ~RangeNodeContext() = default;
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virtual bool IncludeInContext(nsINode& aNode) const { return false; }
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virtual int32_t GetImmediateContextCount(
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const nsTArray<nsINode*>& aAncestorArray) const {
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return -1;
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}
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};
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public:
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nsDocumentEncoder();
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protected:
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/**
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* @param aRangeNodeContext has to be non-null.
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*/
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explicit nsDocumentEncoder(UniquePtr<RangeNodeContext> aRangeNodeContext);
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public:
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NS_DECL_CYCLE_COLLECTING_ISUPPORTS
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NS_DECL_CYCLE_COLLECTION_CLASS(nsDocumentEncoder)
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NS_DECL_NSIDOCUMENTENCODER
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protected:
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virtual ~nsDocumentEncoder();
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void Initialize(bool aClearCachedSerializer = true);
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/**
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* @param aMaxLength As described at
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* `nsIDocumentEncodder.encodeToStringWithMaxLength`.
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*/
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nsresult SerializeDependingOnScope(uint32_t aMaxLength);
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nsresult SerializeSelection();
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nsresult SerializeNode();
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/**
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* @param aMaxLength As described at
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* `nsIDocumentEncodder.encodeToStringWithMaxLength`.
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*/
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nsresult SerializeWholeDocument(uint32_t aMaxLength);
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/**
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* @param aFlags multiple of the flags defined in nsIDocumentEncoder.idl.o
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*/
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static bool IsInvisibleNodeAndShouldBeSkipped(const nsINode& aNode,
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const uint32_t aFlags) {
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if (aFlags & SkipInvisibleContent) {
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// Treat the visibility of the ShadowRoot as if it were
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// the host content.
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//
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// FIXME(emilio): I suspect instead of this a bunch of the GetParent()
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// calls here should be doing GetFlattenedTreeParent, then this condition
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// should be unreachable...
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const nsINode* node{&aNode};
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if (const ShadowRoot* shadowRoot = ShadowRoot::FromNode(node)) {
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node = shadowRoot->GetHost();
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}
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if (node->IsContent()) {
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nsIFrame* frame = node->AsContent()->GetPrimaryFrame();
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if (!frame) {
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if (node->IsElement() && node->AsElement()->IsDisplayContents()) {
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return false;
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}
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if (node->IsText()) {
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// We have already checked that our parent is visible.
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//
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// FIXME(emilio): Text not assigned to a <slot> in Shadow DOM should
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// probably return false...
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return false;
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}
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if (node->IsHTMLElement(nsGkAtoms::rp)) {
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// Ruby parentheses are part of ruby structure, hence
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// shouldn't be stripped out even if it is not displayed.
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return false;
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}
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return true;
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}
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bool isVisible = frame->StyleVisibility()->IsVisible();
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if (!isVisible && node->IsText()) {
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return true;
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}
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}
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}
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return false;
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}
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void ReleaseDocumentReferenceAndInitialize(bool aClearCachedSerializer);
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class MOZ_STACK_CLASS AutoReleaseDocumentIfNeeded final {
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public:
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explicit AutoReleaseDocumentIfNeeded(nsDocumentEncoder* aEncoder)
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: mEncoder(aEncoder) {}
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~AutoReleaseDocumentIfNeeded() {
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if (mEncoder->mFlags & RequiresReinitAfterOutput) {
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const bool clearCachedSerializer = false;
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mEncoder->ReleaseDocumentReferenceAndInitialize(clearCachedSerializer);
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}
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}
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private:
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nsDocumentEncoder* mEncoder;
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};
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nsCOMPtr<Document> mDocument;
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EncodingScope mEncodingScope;
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nsCOMPtr<nsIContentSerializer> mSerializer;
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Maybe<TextStreamer> mTextStreamer;
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nsCOMPtr<nsIDocumentEncoderNodeFixup> mNodeFixup;
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nsString mMimeType;
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const Encoding* mEncoding;
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// Multiple of the flags defined in nsIDocumentEncoder.idl.
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uint32_t mFlags;
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uint32_t mWrapColumn;
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// Whether the serializer cares about being notified to scan elements to
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// keep track of whether they are preformatted. This stores the out
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// argument of nsIContentSerializer::Init().
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bool mNeedsPreformatScanning;
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bool mIsCopying; // Set to true only while copying
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nsStringBuffer* mCachedBuffer;
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class NodeSerializer {
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public:
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/**
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* @param aFlags multiple of the flags defined in nsIDocumentEncoder.idl.
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*/
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NodeSerializer(const bool& aNeedsPreformatScanning,
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const nsCOMPtr<nsIContentSerializer>& aSerializer,
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const uint32_t& aFlags,
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const nsCOMPtr<nsIDocumentEncoderNodeFixup>& aNodeFixup,
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Maybe<TextStreamer>& aTextStreamer)
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: mNeedsPreformatScanning{aNeedsPreformatScanning},
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mSerializer{aSerializer},
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mFlags{aFlags},
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mNodeFixup{aNodeFixup},
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mTextStreamer{aTextStreamer} {}
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nsresult SerializeNodeStart(nsINode& aOriginalNode, int32_t aStartOffset,
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int32_t aEndOffset,
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nsINode* aFixupNode = nullptr) const;
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enum class SerializeRoot { eYes, eNo };
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nsresult SerializeToStringRecursive(nsINode* aNode,
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SerializeRoot aSerializeRoot,
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uint32_t aMaxLength = 0) const;
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nsresult SerializeNodeEnd(nsINode& aOriginalNode,
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nsINode* aFixupNode = nullptr) const;
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[[nodiscard]] nsresult SerializeTextNode(nsINode& aNode,
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int32_t aStartOffset,
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int32_t aEndOffset) const;
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nsresult SerializeToStringIterative(nsINode* aNode) const;
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private:
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const bool& mNeedsPreformatScanning;
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const nsCOMPtr<nsIContentSerializer>& mSerializer;
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// Multiple of the flags defined in nsIDocumentEncoder.idl.
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const uint32_t& mFlags;
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const nsCOMPtr<nsIDocumentEncoderNodeFixup>& mNodeFixup;
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Maybe<TextStreamer>& mTextStreamer;
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};
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NodeSerializer mNodeSerializer;
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const UniquePtr<RangeNodeContext> mRangeNodeContext;
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struct RangeContextSerializer final {
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RangeContextSerializer(const RangeNodeContext& aRangeNodeContext,
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const NodeSerializer& aNodeSerializer)
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: mDisableContextSerialize{false},
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mRangeNodeContext{aRangeNodeContext},
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mNodeSerializer{aNodeSerializer} {}
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nsresult SerializeRangeContextStart(
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const nsTArray<nsINode*>& aAncestorArray);
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nsresult SerializeRangeContextEnd();
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// Used when context has already been serialized for
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// table cell selections (where parent is <tr>)
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bool mDisableContextSerialize;
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AutoTArray<AutoTArray<nsINode*, 8>, 8> mRangeContexts;
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const RangeNodeContext& mRangeNodeContext;
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private:
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const NodeSerializer& mNodeSerializer;
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};
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RangeContextSerializer mRangeContextSerializer;
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struct RangeSerializer {
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// @param aFlags multiple of the flags defined in nsIDocumentEncoder.idl.
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RangeSerializer(const uint32_t& aFlags,
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const NodeSerializer& aNodeSerializer,
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RangeContextSerializer& aRangeContextSerializer)
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: mStartRootIndex{0},
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mEndRootIndex{0},
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mHaltRangeHint{false},
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mFlags{aFlags},
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mNodeSerializer{aNodeSerializer},
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mRangeContextSerializer{aRangeContextSerializer} {}
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void Initialize();
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/**
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* @param aDepth the distance (number of `GetParent` calls) from aNode to
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* aRange's closest common inclusive ancestor.
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*/
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nsresult SerializeRangeNodes(const nsRange* aRange, nsINode* aNode,
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int32_t aDepth);
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/**
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* Serialize aContent's children from aStartOffset to aEndOffset.
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*
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* @param aDepth the distance (number of `GetParent` calls) from aContent to
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* aRange's closest common inclusive ancestor.
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*/
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[[nodiscard]] nsresult SerializeChildrenOfContent(nsIContent& aContent,
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int32_t aStartOffset,
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int32_t aEndOffset,
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const nsRange* aRange,
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int32_t aDepth);
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nsresult SerializeRangeToString(const nsRange* aRange);
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/**
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* https://dom.spec.whatwg.org/#concept-tree-inclusive-ancestor.
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*/
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nsCOMPtr<nsINode> mClosestCommonInclusiveAncestorOfRange;
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/**
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* https://dom.spec.whatwg.org/#concept-tree-inclusive-ancestor.
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*/
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AutoTArray<nsINode*, 8> mCommonInclusiveAncestors;
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ContextInfoDepth mContextInfoDepth;
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private:
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struct StartAndEndContent {
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nsCOMPtr<nsIContent> mStart;
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nsCOMPtr<nsIContent> mEnd;
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};
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StartAndEndContent GetStartAndEndContentForRecursionLevel(
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int32_t aDepth) const;
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bool HasInvisibleParentAndShouldBeSkipped(nsINode& aNode) const;
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nsresult SerializeNodePartiallyContainedInRange(
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nsINode& aNode, nsIContent& aContent,
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const StartAndEndContent& aStartAndEndContent, const nsRange& aRange,
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int32_t aDepth);
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nsresult SerializeTextNode(nsINode& aNode, const nsIContent& aContent,
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const StartAndEndContent& aStartAndEndContent,
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const nsRange& aRange) const;
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RangeBoundariesInclusiveAncestorsAndOffsets
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mRangeBoundariesInclusiveAncestorsAndOffsets;
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int32_t mStartRootIndex;
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int32_t mEndRootIndex;
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bool mHaltRangeHint;
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// Multiple of the flags defined in nsIDocumentEncoder.idl.
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const uint32_t& mFlags;
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const NodeSerializer& mNodeSerializer;
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RangeContextSerializer& mRangeContextSerializer;
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};
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RangeSerializer mRangeSerializer;
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};
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void nsDocumentEncoder::RangeSerializer::Initialize() {
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mContextInfoDepth = {};
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mStartRootIndex = 0;
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mEndRootIndex = 0;
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mHaltRangeHint = false;
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mClosestCommonInclusiveAncestorOfRange = nullptr;
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mRangeBoundariesInclusiveAncestorsAndOffsets = {};
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}
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NS_IMPL_CYCLE_COLLECTING_ADDREF(nsDocumentEncoder)
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NS_IMPL_CYCLE_COLLECTING_RELEASE_WITH_LAST_RELEASE(
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nsDocumentEncoder, ReleaseDocumentReferenceAndInitialize(true))
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsDocumentEncoder)
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NS_INTERFACE_MAP_ENTRY(nsIDocumentEncoder)
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NS_INTERFACE_MAP_ENTRY(nsISupports)
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NS_INTERFACE_MAP_END
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NS_IMPL_CYCLE_COLLECTION(
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nsDocumentEncoder, mDocument, mEncodingScope.mSelection,
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mEncodingScope.mRange, mEncodingScope.mNode, mSerializer,
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mRangeSerializer.mClosestCommonInclusiveAncestorOfRange)
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nsDocumentEncoder::nsDocumentEncoder(
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UniquePtr<RangeNodeContext> aRangeNodeContext)
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: mEncoding(nullptr),
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mIsCopying(false),
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|
mCachedBuffer(nullptr),
|
|
mNodeSerializer(mNeedsPreformatScanning, mSerializer, mFlags, mNodeFixup,
|
|
mTextStreamer),
|
|
mRangeNodeContext(std::move(aRangeNodeContext)),
|
|
mRangeContextSerializer(*mRangeNodeContext, mNodeSerializer),
|
|
mRangeSerializer(mFlags, mNodeSerializer, mRangeContextSerializer) {
|
|
MOZ_ASSERT(mRangeNodeContext);
|
|
|
|
Initialize();
|
|
mMimeType.AssignLiteral("text/plain");
|
|
}
|
|
|
|
nsDocumentEncoder::nsDocumentEncoder()
|
|
: nsDocumentEncoder(MakeUnique<RangeNodeContext>()) {}
|
|
|
|
void nsDocumentEncoder::Initialize(bool aClearCachedSerializer) {
|
|
mFlags = 0;
|
|
mWrapColumn = 72;
|
|
mRangeSerializer.Initialize();
|
|
mNeedsPreformatScanning = false;
|
|
mRangeContextSerializer.mDisableContextSerialize = false;
|
|
mEncodingScope = {};
|
|
mNodeFixup = nullptr;
|
|
if (aClearCachedSerializer) {
|
|
mSerializer = nullptr;
|
|
}
|
|
}
|
|
|
|
static bool ParentIsTR(nsIContent* aContent) {
|
|
mozilla::dom::Element* parent = aContent->GetParentElement();
|
|
if (!parent) {
|
|
return false;
|
|
}
|
|
return parent->IsHTMLElement(nsGkAtoms::tr);
|
|
}
|
|
|
|
nsresult nsDocumentEncoder::SerializeDependingOnScope(uint32_t aMaxLength) {
|
|
nsresult rv = NS_OK;
|
|
if (mEncodingScope.mSelection) {
|
|
rv = SerializeSelection();
|
|
} else if (nsRange* range = mEncodingScope.mRange) {
|
|
rv = mRangeSerializer.SerializeRangeToString(range);
|
|
} else if (mEncodingScope.mNode) {
|
|
rv = SerializeNode();
|
|
} else {
|
|
rv = SerializeWholeDocument(aMaxLength);
|
|
}
|
|
|
|
mEncodingScope = {};
|
|
|
|
return rv;
|
|
}
|
|
|
|
nsresult nsDocumentEncoder::SerializeSelection() {
|
|
NS_ENSURE_TRUE(mEncodingScope.mSelection, NS_ERROR_FAILURE);
|
|
|
|
nsresult rv = NS_OK;
|
|
const Selection* selection = mEncodingScope.mSelection;
|
|
uint32_t count = selection->RangeCount();
|
|
|
|
nsCOMPtr<nsINode> node;
|
|
nsCOMPtr<nsINode> prevNode;
|
|
uint32_t firstRangeStartDepth = 0;
|
|
for (uint32_t i = 0; i < count; ++i) {
|
|
RefPtr<const nsRange> range = selection->GetRangeAt(i);
|
|
|
|
// Bug 236546: newlines not added when copying table cells into clipboard
|
|
// Each selected cell shows up as a range containing a row with a single
|
|
// cell get the row, compare it to previous row and emit </tr><tr> as
|
|
// needed Bug 137450: Problem copying/pasting a table from a web page to
|
|
// Excel. Each separate block of <tr></tr> produced above will be wrapped
|
|
// by the immediate context. This assumes that you can't select cells that
|
|
// are multiple selections from two tables simultaneously.
|
|
node = range->GetStartContainer();
|
|
NS_ENSURE_TRUE(node, NS_ERROR_FAILURE);
|
|
if (node != prevNode) {
|
|
if (prevNode) {
|
|
rv = mNodeSerializer.SerializeNodeEnd(*prevNode);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
}
|
|
nsCOMPtr<nsIContent> content = nsIContent::FromNodeOrNull(node);
|
|
if (content && content->IsHTMLElement(nsGkAtoms::tr) &&
|
|
!ParentIsTR(content)) {
|
|
if (!prevNode) {
|
|
// Went from a non-<tr> to a <tr>
|
|
mRangeSerializer.mCommonInclusiveAncestors.Clear();
|
|
nsContentUtils::GetInclusiveAncestors(
|
|
node->GetParentNode(),
|
|
mRangeSerializer.mCommonInclusiveAncestors);
|
|
rv = mRangeContextSerializer.SerializeRangeContextStart(
|
|
mRangeSerializer.mCommonInclusiveAncestors);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
// Don't let SerializeRangeToString serialize the context again
|
|
mRangeContextSerializer.mDisableContextSerialize = true;
|
|
}
|
|
|
|
rv = mNodeSerializer.SerializeNodeStart(*node, 0, -1);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
prevNode = node;
|
|
} else if (prevNode) {
|
|
// Went from a <tr> to a non-<tr>
|
|
mRangeContextSerializer.mDisableContextSerialize = false;
|
|
|
|
// `mCommonInclusiveAncestors` is used in `EncodeToStringWithContext`
|
|
// too. Update it here to mimic the old behavior.
|
|
mRangeSerializer.mCommonInclusiveAncestors.Clear();
|
|
nsContentUtils::GetInclusiveAncestors(
|
|
prevNode->GetParentNode(),
|
|
mRangeSerializer.mCommonInclusiveAncestors);
|
|
|
|
rv = mRangeContextSerializer.SerializeRangeContextEnd();
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
prevNode = nullptr;
|
|
}
|
|
}
|
|
|
|
rv = mRangeSerializer.SerializeRangeToString(range);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
if (i == 0) {
|
|
firstRangeStartDepth = mRangeSerializer.mContextInfoDepth.mStart;
|
|
}
|
|
}
|
|
mRangeSerializer.mContextInfoDepth.mStart = firstRangeStartDepth;
|
|
|
|
if (prevNode) {
|
|
rv = mNodeSerializer.SerializeNodeEnd(*prevNode);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
mRangeContextSerializer.mDisableContextSerialize = false;
|
|
|
|
// `mCommonInclusiveAncestors` is used in `EncodeToStringWithContext`
|
|
// too. Update it here to mimic the old behavior.
|
|
mRangeSerializer.mCommonInclusiveAncestors.Clear();
|
|
nsContentUtils::GetInclusiveAncestors(
|
|
prevNode->GetParentNode(), mRangeSerializer.mCommonInclusiveAncestors);
|
|
|
|
rv = mRangeContextSerializer.SerializeRangeContextEnd();
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
}
|
|
|
|
// Just to be safe
|
|
mRangeContextSerializer.mDisableContextSerialize = false;
|
|
|
|
return rv;
|
|
}
|
|
|
|
nsresult nsDocumentEncoder::SerializeNode() {
|
|
NS_ENSURE_TRUE(mEncodingScope.mNode, NS_ERROR_FAILURE);
|
|
|
|
nsresult rv = NS_OK;
|
|
nsINode* node = mEncodingScope.mNode;
|
|
const bool nodeIsContainer = mEncodingScope.mNodeIsContainer;
|
|
if (!mNodeFixup && !(mFlags & SkipInvisibleContent) && !mTextStreamer &&
|
|
nodeIsContainer) {
|
|
rv = mNodeSerializer.SerializeToStringIterative(node);
|
|
} else {
|
|
rv = mNodeSerializer.SerializeToStringRecursive(
|
|
node, nodeIsContainer ? NodeSerializer::SerializeRoot::eNo
|
|
: NodeSerializer::SerializeRoot::eYes);
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
nsresult nsDocumentEncoder::SerializeWholeDocument(uint32_t aMaxLength) {
|
|
NS_ENSURE_FALSE(mEncodingScope.mSelection, NS_ERROR_FAILURE);
|
|
NS_ENSURE_FALSE(mEncodingScope.mRange, NS_ERROR_FAILURE);
|
|
NS_ENSURE_FALSE(mEncodingScope.mNode, NS_ERROR_FAILURE);
|
|
|
|
nsresult rv = mSerializer->AppendDocumentStart(mDocument);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
rv = mNodeSerializer.SerializeToStringRecursive(
|
|
mDocument, NodeSerializer::SerializeRoot::eYes, aMaxLength);
|
|
return rv;
|
|
}
|
|
|
|
nsDocumentEncoder::~nsDocumentEncoder() {
|
|
if (mCachedBuffer) {
|
|
mCachedBuffer->Release();
|
|
}
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsDocumentEncoder::Init(Document* aDocument, const nsAString& aMimeType,
|
|
uint32_t aFlags) {
|
|
return NativeInit(aDocument, aMimeType, aFlags);
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsDocumentEncoder::NativeInit(Document* aDocument, const nsAString& aMimeType,
|
|
uint32_t aFlags) {
|
|
if (!aDocument) return NS_ERROR_INVALID_ARG;
|
|
|
|
Initialize(!mMimeType.Equals(aMimeType));
|
|
|
|
mDocument = aDocument;
|
|
|
|
mMimeType = aMimeType;
|
|
|
|
mFlags = aFlags;
|
|
mIsCopying = false;
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsDocumentEncoder::SetWrapColumn(uint32_t aWC) {
|
|
mWrapColumn = aWC;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsDocumentEncoder::SetSelection(Selection* aSelection) {
|
|
mEncodingScope.mSelection = aSelection;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsDocumentEncoder::SetRange(nsRange* aRange) {
|
|
mEncodingScope.mRange = aRange;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsDocumentEncoder::SetNode(nsINode* aNode) {
|
|
mEncodingScope.mNodeIsContainer = false;
|
|
mEncodingScope.mNode = aNode;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsDocumentEncoder::SetContainerNode(nsINode* aContainer) {
|
|
mEncodingScope.mNodeIsContainer = true;
|
|
mEncodingScope.mNode = aContainer;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsDocumentEncoder::SetCharset(const nsACString& aCharset) {
|
|
const Encoding* encoding = Encoding::ForLabel(aCharset);
|
|
if (!encoding) {
|
|
return NS_ERROR_UCONV_NOCONV;
|
|
}
|
|
mEncoding = encoding->OutputEncoding();
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsDocumentEncoder::GetMimeType(nsAString& aMimeType) {
|
|
aMimeType = mMimeType;
|
|
return NS_OK;
|
|
}
|
|
|
|
class FixupNodeDeterminer {
|
|
public:
|
|
FixupNodeDeterminer(nsIDocumentEncoderNodeFixup* aNodeFixup,
|
|
nsINode* aFixupNode, nsINode& aOriginalNode)
|
|
: mIsSerializationOfFixupChildrenNeeded{false},
|
|
mNodeFixup(aNodeFixup),
|
|
mOriginalNode(aOriginalNode) {
|
|
if (mNodeFixup) {
|
|
if (aFixupNode) {
|
|
mFixupNode = aFixupNode;
|
|
} else {
|
|
mNodeFixup->FixupNode(&mOriginalNode,
|
|
&mIsSerializationOfFixupChildrenNeeded,
|
|
getter_AddRefs(mFixupNode));
|
|
}
|
|
}
|
|
}
|
|
|
|
bool IsSerializationOfFixupChildrenNeeded() const {
|
|
return mIsSerializationOfFixupChildrenNeeded;
|
|
}
|
|
|
|
/**
|
|
* @return The fixup node, if available, otherwise the original node. The
|
|
* former is kept alive by this object.
|
|
*/
|
|
nsINode& GetFixupNodeFallBackToOriginalNode() const {
|
|
return mFixupNode ? *mFixupNode : mOriginalNode;
|
|
}
|
|
|
|
private:
|
|
bool mIsSerializationOfFixupChildrenNeeded;
|
|
nsIDocumentEncoderNodeFixup* mNodeFixup;
|
|
nsCOMPtr<nsINode> mFixupNode;
|
|
nsINode& mOriginalNode;
|
|
};
|
|
|
|
nsresult nsDocumentEncoder::NodeSerializer::SerializeNodeStart(
|
|
nsINode& aOriginalNode, int32_t aStartOffset, int32_t aEndOffset,
|
|
nsINode* aFixupNode) const {
|
|
if (mNeedsPreformatScanning) {
|
|
if (aOriginalNode.IsElement()) {
|
|
mSerializer->ScanElementForPreformat(aOriginalNode.AsElement());
|
|
} else if (aOriginalNode.IsText()) {
|
|
const nsCOMPtr<nsINode> parent = aOriginalNode.GetParent();
|
|
if (parent && parent->IsElement()) {
|
|
mSerializer->ScanElementForPreformat(parent->AsElement());
|
|
}
|
|
}
|
|
}
|
|
|
|
if (IsInvisibleNodeAndShouldBeSkipped(aOriginalNode, mFlags)) {
|
|
return NS_OK;
|
|
}
|
|
|
|
FixupNodeDeterminer fixupNodeDeterminer{mNodeFixup, aFixupNode,
|
|
aOriginalNode};
|
|
nsINode* node = &fixupNodeDeterminer.GetFixupNodeFallBackToOriginalNode();
|
|
|
|
nsresult rv = NS_OK;
|
|
|
|
if (node->IsElement()) {
|
|
if ((mFlags & (nsIDocumentEncoder::OutputPreformatted |
|
|
nsIDocumentEncoder::OutputDropInvisibleBreak)) &&
|
|
nsLayoutUtils::IsInvisibleBreak(node)) {
|
|
return rv;
|
|
}
|
|
rv = mSerializer->AppendElementStart(node->AsElement(),
|
|
aOriginalNode.AsElement());
|
|
return rv;
|
|
}
|
|
|
|
switch (node->NodeType()) {
|
|
case nsINode::TEXT_NODE: {
|
|
rv = mSerializer->AppendText(static_cast<nsIContent*>(node), aStartOffset,
|
|
aEndOffset);
|
|
break;
|
|
}
|
|
case nsINode::CDATA_SECTION_NODE: {
|
|
rv = mSerializer->AppendCDATASection(static_cast<nsIContent*>(node),
|
|
aStartOffset, aEndOffset);
|
|
break;
|
|
}
|
|
case nsINode::PROCESSING_INSTRUCTION_NODE: {
|
|
rv = mSerializer->AppendProcessingInstruction(
|
|
static_cast<ProcessingInstruction*>(node), aStartOffset, aEndOffset);
|
|
break;
|
|
}
|
|
case nsINode::COMMENT_NODE: {
|
|
rv = mSerializer->AppendComment(static_cast<Comment*>(node), aStartOffset,
|
|
aEndOffset);
|
|
break;
|
|
}
|
|
case nsINode::DOCUMENT_TYPE_NODE: {
|
|
rv = mSerializer->AppendDoctype(static_cast<DocumentType*>(node));
|
|
break;
|
|
}
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
nsresult nsDocumentEncoder::NodeSerializer::SerializeNodeEnd(
|
|
nsINode& aOriginalNode, nsINode* aFixupNode) const {
|
|
if (mNeedsPreformatScanning) {
|
|
if (aOriginalNode.IsElement()) {
|
|
mSerializer->ForgetElementForPreformat(aOriginalNode.AsElement());
|
|
} else if (aOriginalNode.IsText()) {
|
|
const nsCOMPtr<nsINode> parent = aOriginalNode.GetParent();
|
|
if (parent && parent->IsElement()) {
|
|
mSerializer->ForgetElementForPreformat(parent->AsElement());
|
|
}
|
|
}
|
|
}
|
|
|
|
if (IsInvisibleNodeAndShouldBeSkipped(aOriginalNode, mFlags)) {
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult rv = NS_OK;
|
|
|
|
FixupNodeDeterminer fixupNodeDeterminer{mNodeFixup, aFixupNode,
|
|
aOriginalNode};
|
|
nsINode* node = &fixupNodeDeterminer.GetFixupNodeFallBackToOriginalNode();
|
|
|
|
if (node->IsElement()) {
|
|
rv = mSerializer->AppendElementEnd(node->AsElement(),
|
|
aOriginalNode.AsElement());
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
nsresult nsDocumentEncoder::NodeSerializer::SerializeToStringRecursive(
|
|
nsINode* aNode, SerializeRoot aSerializeRoot, uint32_t aMaxLength) const {
|
|
uint32_t outputLength{0};
|
|
nsresult rv = mSerializer->GetOutputLength(outputLength);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
if (aMaxLength > 0 && outputLength >= aMaxLength) {
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_ENSURE_TRUE(aNode, NS_ERROR_NULL_POINTER);
|
|
|
|
if (IsInvisibleNodeAndShouldBeSkipped(*aNode, mFlags)) {
|
|
return NS_OK;
|
|
}
|
|
|
|
FixupNodeDeterminer fixupNodeDeterminer{mNodeFixup, nullptr, *aNode};
|
|
nsINode* maybeFixedNode =
|
|
&fixupNodeDeterminer.GetFixupNodeFallBackToOriginalNode();
|
|
|
|
if (mFlags & SkipInvisibleContent) {
|
|
if (aNode->IsContent()) {
|
|
if (nsIFrame* frame = aNode->AsContent()->GetPrimaryFrame()) {
|
|
if (!frame->IsSelectable(nullptr)) {
|
|
aSerializeRoot = SerializeRoot::eNo;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (aSerializeRoot == SerializeRoot::eYes) {
|
|
int32_t endOffset = -1;
|
|
if (aMaxLength > 0) {
|
|
MOZ_ASSERT(aMaxLength >= outputLength);
|
|
endOffset = aMaxLength - outputLength;
|
|
}
|
|
rv = SerializeNodeStart(*aNode, 0, endOffset, maybeFixedNode);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
}
|
|
|
|
nsINode* node = fixupNodeDeterminer.IsSerializationOfFixupChildrenNeeded()
|
|
? maybeFixedNode
|
|
: aNode;
|
|
|
|
for (nsINode* child = node->GetFirstChildOfTemplateOrNode(); child;
|
|
child = child->GetNextSibling()) {
|
|
rv = SerializeToStringRecursive(child, SerializeRoot::eYes, aMaxLength);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
}
|
|
|
|
if (aSerializeRoot == SerializeRoot::eYes) {
|
|
rv = SerializeNodeEnd(*aNode, maybeFixedNode);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
}
|
|
|
|
if (mTextStreamer) {
|
|
rv = mTextStreamer->FlushIfStringLongEnough();
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
nsresult nsDocumentEncoder::NodeSerializer::SerializeToStringIterative(
|
|
nsINode* aNode) const {
|
|
nsresult rv;
|
|
|
|
nsINode* node = aNode->GetFirstChildOfTemplateOrNode();
|
|
while (node) {
|
|
nsINode* current = node;
|
|
rv = SerializeNodeStart(*current, 0, -1, current);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
node = current->GetFirstChildOfTemplateOrNode();
|
|
while (!node && current && current != aNode) {
|
|
rv = SerializeNodeEnd(*current);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
// Check if we have siblings.
|
|
node = current->GetNextSibling();
|
|
if (!node) {
|
|
// Perhaps parent node has siblings.
|
|
current = current->GetParentNode();
|
|
|
|
// Handle template element. If the parent is a template's content,
|
|
// then adjust the parent to be the template element.
|
|
if (current && current != aNode && current->IsDocumentFragment()) {
|
|
nsIContent* host = current->AsDocumentFragment()->GetHost();
|
|
if (host && host->IsHTMLElement(nsGkAtoms::_template)) {
|
|
current = host;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
static bool IsTextNode(nsINode* aNode) { return aNode && aNode->IsText(); }
|
|
|
|
nsresult nsDocumentEncoder::NodeSerializer::SerializeTextNode(
|
|
nsINode& aNode, int32_t aStartOffset, int32_t aEndOffset) const {
|
|
MOZ_ASSERT(IsTextNode(&aNode));
|
|
|
|
nsresult rv = SerializeNodeStart(aNode, aStartOffset, aEndOffset);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
rv = SerializeNodeEnd(aNode);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
return rv;
|
|
}
|
|
|
|
nsDocumentEncoder::RangeSerializer::StartAndEndContent
|
|
nsDocumentEncoder::RangeSerializer::GetStartAndEndContentForRecursionLevel(
|
|
const int32_t aDepth) const {
|
|
StartAndEndContent result;
|
|
|
|
const auto& inclusiveAncestorsOfStart =
|
|
mRangeBoundariesInclusiveAncestorsAndOffsets.mInclusiveAncestorsOfStart;
|
|
const auto& inclusiveAncestorsOfEnd =
|
|
mRangeBoundariesInclusiveAncestorsAndOffsets.mInclusiveAncestorsOfEnd;
|
|
int32_t start = mStartRootIndex - aDepth;
|
|
if (start >= 0 && (uint32_t)start <= inclusiveAncestorsOfStart.Length()) {
|
|
result.mStart = inclusiveAncestorsOfStart[start];
|
|
}
|
|
|
|
int32_t end = mEndRootIndex - aDepth;
|
|
if (end >= 0 && (uint32_t)end <= inclusiveAncestorsOfEnd.Length()) {
|
|
result.mEnd = inclusiveAncestorsOfEnd[end];
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
nsresult nsDocumentEncoder::RangeSerializer::SerializeTextNode(
|
|
nsINode& aNode, const nsIContent& aContent,
|
|
const StartAndEndContent& aStartAndEndContent,
|
|
const nsRange& aRange) const {
|
|
const int32_t startOffset =
|
|
(aStartAndEndContent.mStart == &aContent) ? aRange.StartOffset() : 0;
|
|
const int32_t endOffset =
|
|
(aStartAndEndContent.mEnd == &aContent) ? aRange.EndOffset() : -1;
|
|
return mNodeSerializer.SerializeTextNode(aNode, startOffset, endOffset);
|
|
}
|
|
|
|
nsresult nsDocumentEncoder::RangeSerializer::SerializeRangeNodes(
|
|
const nsRange* const aRange, nsINode* const aNode, const int32_t aDepth) {
|
|
MOZ_ASSERT(aDepth >= 0);
|
|
MOZ_ASSERT(aRange);
|
|
|
|
nsCOMPtr<nsIContent> content = nsIContent::FromNodeOrNull(aNode);
|
|
NS_ENSURE_TRUE(content, NS_ERROR_FAILURE);
|
|
|
|
if (nsDocumentEncoder::IsInvisibleNodeAndShouldBeSkipped(*aNode, mFlags)) {
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult rv = NS_OK;
|
|
|
|
StartAndEndContent startAndEndContent =
|
|
GetStartAndEndContentForRecursionLevel(aDepth);
|
|
|
|
if (startAndEndContent.mStart != content &&
|
|
startAndEndContent.mEnd != content) {
|
|
// node is completely contained in range. Serialize the whole subtree
|
|
// rooted by this node.
|
|
rv = mNodeSerializer.SerializeToStringRecursive(
|
|
aNode, NodeSerializer::SerializeRoot::eYes);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
} else {
|
|
rv = SerializeNodePartiallyContainedInRange(
|
|
*aNode, *content, startAndEndContent, *aRange, aDepth);
|
|
if (NS_WARN_IF(NS_FAILED(rv))) {
|
|
return rv;
|
|
}
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult
|
|
nsDocumentEncoder::RangeSerializer::SerializeNodePartiallyContainedInRange(
|
|
nsINode& aNode, nsIContent& aContent,
|
|
const StartAndEndContent& aStartAndEndContent, const nsRange& aRange,
|
|
const int32_t aDepth) {
|
|
// due to implementation it is impossible for text node to be both start and
|
|
// end of range. We would have handled that case without getting here.
|
|
// XXXsmaug What does this all mean?
|
|
if (IsTextNode(&aNode)) {
|
|
nsresult rv =
|
|
SerializeTextNode(aNode, aContent, aStartAndEndContent, aRange);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
} else {
|
|
if (&aNode != mClosestCommonInclusiveAncestorOfRange) {
|
|
if (mRangeContextSerializer.mRangeNodeContext.IncludeInContext(aNode)) {
|
|
// halt the incrementing of mContextInfoDepth. This
|
|
// is so paste client will include this node in paste.
|
|
mHaltRangeHint = true;
|
|
}
|
|
if ((aStartAndEndContent.mStart == &aContent) && !mHaltRangeHint) {
|
|
++mContextInfoDepth.mStart;
|
|
}
|
|
if ((aStartAndEndContent.mEnd == &aContent) && !mHaltRangeHint) {
|
|
++mContextInfoDepth.mEnd;
|
|
}
|
|
|
|
// serialize the start of this node
|
|
nsresult rv = mNodeSerializer.SerializeNodeStart(aNode, 0, -1);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
}
|
|
|
|
const auto& inclusiveAncestorsOffsetsOfStart =
|
|
mRangeBoundariesInclusiveAncestorsAndOffsets
|
|
.mInclusiveAncestorsOffsetsOfStart;
|
|
const auto& inclusiveAncestorsOffsetsOfEnd =
|
|
mRangeBoundariesInclusiveAncestorsAndOffsets
|
|
.mInclusiveAncestorsOffsetsOfEnd;
|
|
// do some calculations that will tell us which children of this
|
|
// node are in the range.
|
|
int32_t startOffset = 0, endOffset = -1;
|
|
if (aStartAndEndContent.mStart == &aContent && mStartRootIndex >= aDepth) {
|
|
startOffset = inclusiveAncestorsOffsetsOfStart[mStartRootIndex - aDepth];
|
|
}
|
|
if (aStartAndEndContent.mEnd == &aContent && mEndRootIndex >= aDepth) {
|
|
endOffset = inclusiveAncestorsOffsetsOfEnd[mEndRootIndex - aDepth];
|
|
}
|
|
// generated aContent will cause offset values of -1 to be returned.
|
|
uint32_t childCount = aContent.GetChildCount();
|
|
|
|
if (startOffset == -1) startOffset = 0;
|
|
if (endOffset == -1)
|
|
endOffset = childCount;
|
|
else {
|
|
// if we are at the "tip" of the selection, endOffset is fine.
|
|
// otherwise, we need to add one. This is because of the semantics
|
|
// of the offset list created by GetInclusiveAncestorsAndOffsets(). The
|
|
// intermediate points on the list use the endOffset of the
|
|
// location of the ancestor, rather than just past it. So we need
|
|
// to add one here in order to include it in the children we serialize.
|
|
if (&aNode != aRange.GetEndContainer()) {
|
|
endOffset++;
|
|
}
|
|
}
|
|
|
|
if (endOffset) {
|
|
nsresult rv = SerializeChildrenOfContent(aContent, startOffset, endOffset,
|
|
&aRange, aDepth);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
}
|
|
// serialize the end of this node
|
|
if (&aNode != mClosestCommonInclusiveAncestorOfRange) {
|
|
nsresult rv = mNodeSerializer.SerializeNodeEnd(aNode);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
}
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult nsDocumentEncoder::RangeSerializer::SerializeChildrenOfContent(
|
|
nsIContent& aContent, int32_t aStartOffset, int32_t aEndOffset,
|
|
const nsRange* aRange, int32_t aDepth) {
|
|
// serialize the children of this node that are in the range
|
|
nsIContent* childAsNode = aContent.GetFirstChild();
|
|
int32_t j = 0;
|
|
|
|
for (; j < aStartOffset && childAsNode; ++j) {
|
|
childAsNode = childAsNode->GetNextSibling();
|
|
}
|
|
|
|
MOZ_ASSERT(j == aStartOffset);
|
|
|
|
for (; childAsNode && j < aEndOffset; ++j) {
|
|
nsresult rv{NS_OK};
|
|
if ((j == aStartOffset) || (j == aEndOffset - 1)) {
|
|
rv = SerializeRangeNodes(aRange, childAsNode, aDepth + 1);
|
|
} else {
|
|
rv = mNodeSerializer.SerializeToStringRecursive(
|
|
childAsNode, NodeSerializer::SerializeRoot::eYes);
|
|
}
|
|
|
|
if (NS_FAILED(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
childAsNode = childAsNode->GetNextSibling();
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult nsDocumentEncoder::RangeContextSerializer::SerializeRangeContextStart(
|
|
const nsTArray<nsINode*>& aAncestorArray) {
|
|
if (mDisableContextSerialize) {
|
|
return NS_OK;
|
|
}
|
|
|
|
AutoTArray<nsINode*, 8>* serializedContext = mRangeContexts.AppendElement();
|
|
|
|
int32_t i = aAncestorArray.Length(), j;
|
|
nsresult rv = NS_OK;
|
|
|
|
// currently only for table-related elements; see Bug 137450
|
|
j = mRangeNodeContext.GetImmediateContextCount(aAncestorArray);
|
|
|
|
while (i > 0) {
|
|
nsINode* node = aAncestorArray.ElementAt(--i);
|
|
if (!node) break;
|
|
|
|
// Either a general inclusion or as immediate context
|
|
if (mRangeNodeContext.IncludeInContext(*node) || i < j) {
|
|
rv = mNodeSerializer.SerializeNodeStart(*node, 0, -1);
|
|
serializedContext->AppendElement(node);
|
|
if (NS_FAILED(rv)) break;
|
|
}
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
nsresult nsDocumentEncoder::RangeContextSerializer::SerializeRangeContextEnd() {
|
|
if (mDisableContextSerialize) {
|
|
return NS_OK;
|
|
}
|
|
|
|
MOZ_RELEASE_ASSERT(!mRangeContexts.IsEmpty(),
|
|
"Tried to end context without starting one.");
|
|
AutoTArray<nsINode*, 8>& serializedContext = mRangeContexts.LastElement();
|
|
|
|
nsresult rv = NS_OK;
|
|
for (nsINode* node : Reversed(serializedContext)) {
|
|
rv = mNodeSerializer.SerializeNodeEnd(*node);
|
|
|
|
if (NS_FAILED(rv)) break;
|
|
}
|
|
|
|
mRangeContexts.RemoveLastElement();
|
|
return rv;
|
|
}
|
|
|
|
bool nsDocumentEncoder::RangeSerializer::HasInvisibleParentAndShouldBeSkipped(
|
|
nsINode& aNode) const {
|
|
if (!(mFlags & SkipInvisibleContent)) {
|
|
return false;
|
|
}
|
|
|
|
// Check that the parent is visible if we don't a frame.
|
|
// IsInvisibleNodeAndShouldBeSkipped() will do it when there's a frame.
|
|
nsCOMPtr<nsIContent> content = nsIContent::FromNode(aNode);
|
|
if (content && !content->GetPrimaryFrame()) {
|
|
nsIContent* parent = content->GetParent();
|
|
return !parent || IsInvisibleNodeAndShouldBeSkipped(*parent, mFlags);
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
nsresult nsDocumentEncoder::RangeSerializer::SerializeRangeToString(
|
|
const nsRange* aRange) {
|
|
if (!aRange || aRange->Collapsed()) return NS_OK;
|
|
|
|
mClosestCommonInclusiveAncestorOfRange =
|
|
aRange->GetClosestCommonInclusiveAncestor();
|
|
|
|
if (!mClosestCommonInclusiveAncestorOfRange) {
|
|
return NS_OK;
|
|
}
|
|
|
|
nsINode* startContainer = aRange->GetStartContainer();
|
|
NS_ENSURE_TRUE(startContainer, NS_ERROR_FAILURE);
|
|
int32_t startOffset = aRange->StartOffset();
|
|
|
|
nsINode* endContainer = aRange->GetEndContainer();
|
|
NS_ENSURE_TRUE(endContainer, NS_ERROR_FAILURE);
|
|
int32_t endOffset = aRange->EndOffset();
|
|
|
|
mContextInfoDepth = {};
|
|
mCommonInclusiveAncestors.Clear();
|
|
|
|
mRangeBoundariesInclusiveAncestorsAndOffsets = {};
|
|
auto& inclusiveAncestorsOfStart =
|
|
mRangeBoundariesInclusiveAncestorsAndOffsets.mInclusiveAncestorsOfStart;
|
|
auto& inclusiveAncestorsOffsetsOfStart =
|
|
mRangeBoundariesInclusiveAncestorsAndOffsets
|
|
.mInclusiveAncestorsOffsetsOfStart;
|
|
auto& inclusiveAncestorsOfEnd =
|
|
mRangeBoundariesInclusiveAncestorsAndOffsets.mInclusiveAncestorsOfEnd;
|
|
auto& inclusiveAncestorsOffsetsOfEnd =
|
|
mRangeBoundariesInclusiveAncestorsAndOffsets
|
|
.mInclusiveAncestorsOffsetsOfEnd;
|
|
|
|
nsContentUtils::GetInclusiveAncestors(mClosestCommonInclusiveAncestorOfRange,
|
|
mCommonInclusiveAncestors);
|
|
nsContentUtils::GetInclusiveAncestorsAndOffsets(
|
|
startContainer, startOffset, &inclusiveAncestorsOfStart,
|
|
&inclusiveAncestorsOffsetsOfStart);
|
|
nsContentUtils::GetInclusiveAncestorsAndOffsets(
|
|
endContainer, endOffset, &inclusiveAncestorsOfEnd,
|
|
&inclusiveAncestorsOffsetsOfEnd);
|
|
|
|
nsCOMPtr<nsIContent> commonContent =
|
|
nsIContent::FromNodeOrNull(mClosestCommonInclusiveAncestorOfRange);
|
|
mStartRootIndex = inclusiveAncestorsOfStart.IndexOf(commonContent);
|
|
mEndRootIndex = inclusiveAncestorsOfEnd.IndexOf(commonContent);
|
|
|
|
nsresult rv = NS_OK;
|
|
|
|
rv = mRangeContextSerializer.SerializeRangeContextStart(
|
|
mCommonInclusiveAncestors);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
if (startContainer == endContainer && IsTextNode(startContainer)) {
|
|
if (HasInvisibleParentAndShouldBeSkipped(*startContainer)) {
|
|
return NS_OK;
|
|
}
|
|
rv = mNodeSerializer.SerializeTextNode(*startContainer, startOffset,
|
|
endOffset);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
} else {
|
|
rv = SerializeRangeNodes(aRange, mClosestCommonInclusiveAncestorOfRange, 0);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
}
|
|
rv = mRangeContextSerializer.SerializeRangeContextEnd();
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
return rv;
|
|
}
|
|
|
|
void nsDocumentEncoder::ReleaseDocumentReferenceAndInitialize(
|
|
bool aClearCachedSerializer) {
|
|
mDocument = nullptr;
|
|
|
|
Initialize(aClearCachedSerializer);
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsDocumentEncoder::EncodeToString(nsAString& aOutputString) {
|
|
return EncodeToStringWithMaxLength(0, aOutputString);
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsDocumentEncoder::EncodeToStringWithMaxLength(uint32_t aMaxLength,
|
|
nsAString& aOutputString) {
|
|
MOZ_ASSERT(mRangeContextSerializer.mRangeContexts.IsEmpty(),
|
|
"Re-entrant call to nsDocumentEncoder.");
|
|
auto rangeContextGuard =
|
|
MakeScopeExit([&] { mRangeContextSerializer.mRangeContexts.Clear(); });
|
|
|
|
if (!mDocument) return NS_ERROR_NOT_INITIALIZED;
|
|
|
|
AutoReleaseDocumentIfNeeded autoReleaseDocument(this);
|
|
|
|
aOutputString.Truncate();
|
|
|
|
nsString output;
|
|
static const size_t kStringBufferSizeInBytes = 2048;
|
|
if (!mCachedBuffer) {
|
|
mCachedBuffer = nsStringBuffer::Alloc(kStringBufferSizeInBytes).take();
|
|
if (NS_WARN_IF(!mCachedBuffer)) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
}
|
|
NS_ASSERTION(
|
|
!mCachedBuffer->IsReadonly(),
|
|
"nsIDocumentEncoder shouldn't keep reference to non-readonly buffer!");
|
|
static_cast<char16_t*>(mCachedBuffer->Data())[0] = char16_t(0);
|
|
mCachedBuffer->ToString(0, output, true);
|
|
// output owns the buffer now!
|
|
mCachedBuffer = nullptr;
|
|
|
|
if (!mSerializer) {
|
|
nsAutoCString progId(NS_CONTENTSERIALIZER_CONTRACTID_PREFIX);
|
|
AppendUTF16toUTF8(mMimeType, progId);
|
|
|
|
mSerializer = do_CreateInstance(progId.get());
|
|
NS_ENSURE_TRUE(mSerializer, NS_ERROR_NOT_IMPLEMENTED);
|
|
}
|
|
|
|
nsresult rv = NS_OK;
|
|
|
|
bool rewriteEncodingDeclaration =
|
|
!mEncodingScope.IsLimited() &&
|
|
!(mFlags & OutputDontRewriteEncodingDeclaration);
|
|
mSerializer->Init(mFlags, mWrapColumn, mEncoding, mIsCopying,
|
|
rewriteEncodingDeclaration, &mNeedsPreformatScanning,
|
|
output);
|
|
|
|
rv = SerializeDependingOnScope(aMaxLength);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
rv = mSerializer->FlushAndFinish();
|
|
|
|
mCachedBuffer = nsStringBuffer::FromString(output);
|
|
// We have to be careful how we set aOutputString, because we don't
|
|
// want it to end up sharing mCachedBuffer if we plan to reuse it.
|
|
bool setOutput = false;
|
|
// Try to cache the buffer.
|
|
if (mCachedBuffer) {
|
|
if ((mCachedBuffer->StorageSize() == kStringBufferSizeInBytes) &&
|
|
!mCachedBuffer->IsReadonly()) {
|
|
mCachedBuffer->AddRef();
|
|
} else {
|
|
if (NS_SUCCEEDED(rv)) {
|
|
mCachedBuffer->ToString(output.Length(), aOutputString);
|
|
setOutput = true;
|
|
}
|
|
mCachedBuffer = nullptr;
|
|
}
|
|
}
|
|
|
|
if (!setOutput && NS_SUCCEEDED(rv)) {
|
|
aOutputString.Append(output.get(), output.Length());
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsDocumentEncoder::EncodeToStream(nsIOutputStream* aStream) {
|
|
MOZ_ASSERT(mRangeContextSerializer.mRangeContexts.IsEmpty(),
|
|
"Re-entrant call to nsDocumentEncoder.");
|
|
auto rangeContextGuard =
|
|
MakeScopeExit([&] { mRangeContextSerializer.mRangeContexts.Clear(); });
|
|
NS_ENSURE_ARG_POINTER(aStream);
|
|
|
|
nsresult rv = NS_OK;
|
|
|
|
if (!mDocument) return NS_ERROR_NOT_INITIALIZED;
|
|
|
|
if (!mEncoding) {
|
|
return NS_ERROR_UCONV_NOCONV;
|
|
}
|
|
|
|
nsAutoString buf;
|
|
const bool isPlainText = mMimeType.LowerCaseEqualsLiteral(kTextMime);
|
|
mTextStreamer.emplace(*aStream, mEncoding->NewEncoder(), isPlainText, buf);
|
|
|
|
rv = EncodeToString(buf);
|
|
|
|
// Force a flush of the last chunk of data.
|
|
rv = mTextStreamer->ForceFlush();
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
mTextStreamer.reset();
|
|
|
|
return rv;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsDocumentEncoder::EncodeToStringWithContext(nsAString& aContextString,
|
|
nsAString& aInfoString,
|
|
nsAString& aEncodedString) {
|
|
return NS_ERROR_NOT_IMPLEMENTED;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsDocumentEncoder::SetNodeFixup(nsIDocumentEncoderNodeFixup* aFixup) {
|
|
mNodeFixup = aFixup;
|
|
return NS_OK;
|
|
}
|
|
|
|
bool do_getDocumentTypeSupportedForEncoding(const char* aContentType) {
|
|
if (!nsCRT::strcmp(aContentType, "text/xml") ||
|
|
!nsCRT::strcmp(aContentType, "application/xml") ||
|
|
!nsCRT::strcmp(aContentType, "application/xhtml+xml") ||
|
|
!nsCRT::strcmp(aContentType, "image/svg+xml") ||
|
|
!nsCRT::strcmp(aContentType, "text/html") ||
|
|
!nsCRT::strcmp(aContentType, "text/plain")) {
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
already_AddRefed<nsIDocumentEncoder> do_createDocumentEncoder(
|
|
const char* aContentType) {
|
|
if (do_getDocumentTypeSupportedForEncoding(aContentType)) {
|
|
return do_AddRef(new nsDocumentEncoder);
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
class nsHTMLCopyEncoder : public nsDocumentEncoder {
|
|
private:
|
|
class RangeNodeContext final : public nsDocumentEncoder::RangeNodeContext {
|
|
bool IncludeInContext(nsINode& aNode) const final;
|
|
|
|
int32_t GetImmediateContextCount(
|
|
const nsTArray<nsINode*>& aAncestorArray) const final;
|
|
};
|
|
|
|
public:
|
|
nsHTMLCopyEncoder();
|
|
~nsHTMLCopyEncoder();
|
|
|
|
NS_IMETHOD Init(Document* aDocument, const nsAString& aMimeType,
|
|
uint32_t aFlags) override;
|
|
|
|
// overridden methods from nsDocumentEncoder
|
|
MOZ_CAN_RUN_SCRIPT_BOUNDARY
|
|
NS_IMETHOD SetSelection(Selection* aSelection) override;
|
|
NS_IMETHOD EncodeToStringWithContext(nsAString& aContextString,
|
|
nsAString& aInfoString,
|
|
nsAString& aEncodedString) override;
|
|
NS_IMETHOD EncodeToString(nsAString& aOutputString) override;
|
|
|
|
protected:
|
|
enum Endpoint { kStart, kEnd };
|
|
|
|
nsresult PromoteRange(nsRange* inRange);
|
|
nsresult PromoteAncestorChain(nsCOMPtr<nsINode>* ioNode,
|
|
int32_t* ioStartOffset, int32_t* ioEndOffset);
|
|
nsresult GetPromotedPoint(Endpoint aWhere, nsINode* aNode, int32_t aOffset,
|
|
nsCOMPtr<nsINode>* outNode, int32_t* outOffset,
|
|
nsINode* aCommon);
|
|
static nsCOMPtr<nsINode> GetChildAt(nsINode* aParent, int32_t aOffset);
|
|
static bool IsMozBR(Element* aNode);
|
|
static nsresult GetNodeLocation(nsINode* inChild,
|
|
nsCOMPtr<nsINode>* outParent,
|
|
int32_t* outOffset);
|
|
bool IsRoot(nsINode* aNode);
|
|
static bool IsFirstNode(nsINode* aNode);
|
|
static bool IsLastNode(nsINode* aNode);
|
|
|
|
bool mIsTextWidget;
|
|
};
|
|
|
|
nsHTMLCopyEncoder::nsHTMLCopyEncoder()
|
|
: nsDocumentEncoder{MakeUnique<nsHTMLCopyEncoder::RangeNodeContext>()} {
|
|
mIsTextWidget = false;
|
|
}
|
|
|
|
nsHTMLCopyEncoder::~nsHTMLCopyEncoder() = default;
|
|
|
|
NS_IMETHODIMP
|
|
nsHTMLCopyEncoder::Init(Document* aDocument, const nsAString& aMimeType,
|
|
uint32_t aFlags) {
|
|
if (!aDocument) return NS_ERROR_INVALID_ARG;
|
|
|
|
mIsTextWidget = false;
|
|
Initialize();
|
|
|
|
mIsCopying = true;
|
|
mDocument = aDocument;
|
|
|
|
// Hack, hack! Traditionally, the caller passes text/unicode, which is
|
|
// treated as "guess text/html or text/plain" in this context. (It has a
|
|
// different meaning in other contexts. Sigh.) From now on, "text/plain"
|
|
// means forcing text/plain instead of guessing.
|
|
if (aMimeType.EqualsLiteral("text/plain")) {
|
|
mMimeType.AssignLiteral("text/plain");
|
|
} else {
|
|
mMimeType.AssignLiteral("text/html");
|
|
}
|
|
|
|
// Make all links absolute when copying
|
|
// (see related bugs #57296, #41924, #58646, #32768)
|
|
mFlags = aFlags | OutputAbsoluteLinks;
|
|
|
|
if (!mDocument->IsScriptEnabled()) mFlags |= OutputNoScriptContent;
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsHTMLCopyEncoder::SetSelection(Selection* aSelection) {
|
|
// check for text widgets: we need to recognize these so that
|
|
// we don't tweak the selection to be outside of the magic
|
|
// div that ender-lite text widgets are embedded in.
|
|
|
|
if (!aSelection) return NS_ERROR_NULL_POINTER;
|
|
|
|
uint32_t rangeCount = aSelection->RangeCount();
|
|
|
|
// if selection is uninitialized return
|
|
if (!rangeCount) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
// we'll just use the common parent of the first range. Implicit assumption
|
|
// here that multi-range selections are table cell selections, in which case
|
|
// the common parent is somewhere in the table and we don't really care where.
|
|
//
|
|
// FIXME(emilio, bug 1455894): This assumption is already wrong, and will
|
|
// probably be more wrong in a Shadow DOM world...
|
|
//
|
|
// We should be able to write this as "Find the common ancestor of the
|
|
// selection, then go through the flattened tree and serialize the selected
|
|
// nodes", effectively serializing the composed tree.
|
|
RefPtr<nsRange> range = aSelection->GetRangeAt(0);
|
|
nsINode* commonParent = range->GetClosestCommonInclusiveAncestor();
|
|
|
|
for (nsCOMPtr<nsIContent> selContent(
|
|
nsIContent::FromNodeOrNull(commonParent));
|
|
selContent; selContent = selContent->GetParent()) {
|
|
// checking for selection inside a plaintext form widget
|
|
if (selContent->IsAnyOfHTMLElements(nsGkAtoms::input,
|
|
nsGkAtoms::textarea)) {
|
|
mIsTextWidget = true;
|
|
break;
|
|
}
|
|
}
|
|
|
|
// normalize selection if we are not in a widget
|
|
if (mIsTextWidget) {
|
|
mEncodingScope.mSelection = aSelection;
|
|
mMimeType.AssignLiteral("text/plain");
|
|
return NS_OK;
|
|
}
|
|
|
|
// XXX We should try to get rid of the Selection object here.
|
|
// XXX bug 1245883
|
|
|
|
// also consider ourselves in a text widget if we can't find an html document
|
|
if (!(mDocument && mDocument->IsHTMLDocument())) {
|
|
mIsTextWidget = true;
|
|
mEncodingScope.mSelection = aSelection;
|
|
// mMimeType is set to text/plain when encoding starts.
|
|
return NS_OK;
|
|
}
|
|
|
|
// there's no Clone() for selection! fix...
|
|
// nsresult rv = aSelection->Clone(getter_AddRefs(mSelection);
|
|
// NS_ENSURE_SUCCESS(rv, rv);
|
|
mEncodingScope.mSelection = new Selection(SelectionType::eNormal, nullptr);
|
|
|
|
// loop thru the ranges in the selection
|
|
for (uint32_t rangeIdx = 0; rangeIdx < rangeCount; ++rangeIdx) {
|
|
range = aSelection->GetRangeAt(rangeIdx);
|
|
NS_ENSURE_TRUE(range, NS_ERROR_FAILURE);
|
|
RefPtr<nsRange> myRange = range->CloneRange();
|
|
MOZ_ASSERT(myRange);
|
|
|
|
// adjust range to include any ancestors who's children are entirely
|
|
// selected
|
|
nsresult rv = PromoteRange(myRange);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
ErrorResult result;
|
|
RefPtr<Selection> selection(mEncodingScope.mSelection);
|
|
RefPtr<Document> document(mDocument);
|
|
selection->AddRangeAndSelectFramesAndNotifyListeners(*myRange, document,
|
|
result);
|
|
rv = result.StealNSResult();
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsHTMLCopyEncoder::EncodeToString(nsAString& aOutputString) {
|
|
if (mIsTextWidget) {
|
|
mMimeType.AssignLiteral("text/plain");
|
|
}
|
|
return nsDocumentEncoder::EncodeToString(aOutputString);
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsHTMLCopyEncoder::EncodeToStringWithContext(nsAString& aContextString,
|
|
nsAString& aInfoString,
|
|
nsAString& aEncodedString) {
|
|
nsresult rv = EncodeToString(aEncodedString);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
// do not encode any context info or range hints if we are in a text widget.
|
|
if (mIsTextWidget) return NS_OK;
|
|
|
|
// now encode common ancestors into aContextString. Note that the common
|
|
// ancestors will be for the last range in the selection in the case of
|
|
// multirange selections. encoding ancestors every range in a multirange
|
|
// selection in a way that could be understood by the paste code would be a
|
|
// lot more work to do. As a practical matter, selections are single range,
|
|
// and the ones that aren't are table cell selections where all the cells are
|
|
// in the same table.
|
|
|
|
mSerializer->Init(mFlags, mWrapColumn, mEncoding, mIsCopying, false,
|
|
&mNeedsPreformatScanning, aContextString);
|
|
|
|
// leaf of ancestors might be text node. If so discard it.
|
|
int32_t count = mRangeSerializer.mCommonInclusiveAncestors.Length();
|
|
int32_t i;
|
|
nsCOMPtr<nsINode> node;
|
|
if (count > 0) {
|
|
node = mRangeSerializer.mCommonInclusiveAncestors.ElementAt(0);
|
|
}
|
|
|
|
if (node && IsTextNode(node)) {
|
|
mRangeSerializer.mCommonInclusiveAncestors.RemoveElementAt(0);
|
|
if (mRangeSerializer.mContextInfoDepth.mStart) {
|
|
--mRangeSerializer.mContextInfoDepth.mStart;
|
|
}
|
|
if (mRangeSerializer.mContextInfoDepth.mEnd) {
|
|
--mRangeSerializer.mContextInfoDepth.mEnd;
|
|
}
|
|
count--;
|
|
}
|
|
|
|
i = count;
|
|
while (i > 0) {
|
|
node = mRangeSerializer.mCommonInclusiveAncestors.ElementAt(--i);
|
|
rv = mNodeSerializer.SerializeNodeStart(*node, 0, -1);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
}
|
|
// i = 0; guaranteed by above
|
|
while (i < count) {
|
|
node = mRangeSerializer.mCommonInclusiveAncestors.ElementAt(i++);
|
|
rv = mNodeSerializer.SerializeNodeEnd(*node);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
}
|
|
|
|
mSerializer->Finish();
|
|
|
|
// encode range info : the start and end depth of the selection, where the
|
|
// depth is distance down in the parent hierarchy. Later we will need to add
|
|
// leading/trailing whitespace info to this.
|
|
nsAutoString infoString;
|
|
infoString.AppendInt(mRangeSerializer.mContextInfoDepth.mStart);
|
|
infoString.Append(char16_t(','));
|
|
infoString.AppendInt(mRangeSerializer.mContextInfoDepth.mEnd);
|
|
aInfoString = infoString;
|
|
|
|
return rv;
|
|
}
|
|
|
|
bool nsHTMLCopyEncoder::RangeNodeContext::IncludeInContext(
|
|
nsINode& aNode) const {
|
|
nsCOMPtr<nsIContent> content(nsIContent::FromNodeOrNull(&aNode));
|
|
|
|
if (!content) return false;
|
|
|
|
return content->IsAnyOfHTMLElements(
|
|
nsGkAtoms::b, nsGkAtoms::i, nsGkAtoms::u, nsGkAtoms::a, nsGkAtoms::tt,
|
|
nsGkAtoms::s, nsGkAtoms::big, nsGkAtoms::small, nsGkAtoms::strike,
|
|
nsGkAtoms::em, nsGkAtoms::strong, nsGkAtoms::dfn, nsGkAtoms::code,
|
|
nsGkAtoms::cite, nsGkAtoms::var, nsGkAtoms::abbr, nsGkAtoms::font,
|
|
nsGkAtoms::script, nsGkAtoms::span, nsGkAtoms::pre, nsGkAtoms::h1,
|
|
nsGkAtoms::h2, nsGkAtoms::h3, nsGkAtoms::h4, nsGkAtoms::h5,
|
|
nsGkAtoms::h6);
|
|
}
|
|
|
|
nsresult nsHTMLCopyEncoder::PromoteRange(nsRange* inRange) {
|
|
if (!inRange->IsPositioned()) {
|
|
return NS_ERROR_UNEXPECTED;
|
|
}
|
|
nsCOMPtr<nsINode> startNode = inRange->GetStartContainer();
|
|
uint32_t startOffset = inRange->StartOffset();
|
|
nsCOMPtr<nsINode> endNode = inRange->GetEndContainer();
|
|
uint32_t endOffset = inRange->EndOffset();
|
|
nsCOMPtr<nsINode> common = inRange->GetClosestCommonInclusiveAncestor();
|
|
|
|
nsCOMPtr<nsINode> opStartNode;
|
|
nsCOMPtr<nsINode> opEndNode;
|
|
int32_t opStartOffset, opEndOffset;
|
|
|
|
// examine range endpoints.
|
|
nsresult rv =
|
|
GetPromotedPoint(kStart, startNode, static_cast<int32_t>(startOffset),
|
|
address_of(opStartNode), &opStartOffset, common);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
rv = GetPromotedPoint(kEnd, endNode, static_cast<int32_t>(endOffset),
|
|
address_of(opEndNode), &opEndOffset, common);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
// if both range endpoints are at the common ancestor, check for possible
|
|
// inclusion of ancestors
|
|
if (opStartNode == common && opEndNode == common) {
|
|
rv = PromoteAncestorChain(address_of(opStartNode), &opStartOffset,
|
|
&opEndOffset);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
opEndNode = opStartNode;
|
|
}
|
|
|
|
// set the range to the new values
|
|
ErrorResult err;
|
|
inRange->SetStart(*opStartNode, static_cast<uint32_t>(opStartOffset), err);
|
|
if (NS_WARN_IF(err.Failed())) {
|
|
return err.StealNSResult();
|
|
}
|
|
inRange->SetEnd(*opEndNode, static_cast<uint32_t>(opEndOffset), err);
|
|
if (NS_WARN_IF(err.Failed())) {
|
|
return err.StealNSResult();
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
// PromoteAncestorChain will promote a range represented by
|
|
// [{*ioNode,*ioStartOffset} , {*ioNode,*ioEndOffset}] The promotion is
|
|
// different from that found in getPromotedPoint: it will only promote one
|
|
// endpoint if it can promote the other. Thus, instead of having a
|
|
// startnode/endNode, there is just the one ioNode.
|
|
nsresult nsHTMLCopyEncoder::PromoteAncestorChain(nsCOMPtr<nsINode>* ioNode,
|
|
int32_t* ioStartOffset,
|
|
int32_t* ioEndOffset) {
|
|
if (!ioNode || !ioStartOffset || !ioEndOffset) return NS_ERROR_NULL_POINTER;
|
|
|
|
nsresult rv = NS_OK;
|
|
bool done = false;
|
|
|
|
nsCOMPtr<nsINode> frontNode, endNode, parent;
|
|
int32_t frontOffset, endOffset;
|
|
|
|
// save the editable state of the ioNode, so we don't promote an ancestor if
|
|
// it has different editable state
|
|
nsCOMPtr<nsINode> node = *ioNode;
|
|
bool isEditable = node->IsEditable();
|
|
|
|
// loop for as long as we can promote both endpoints
|
|
while (!done) {
|
|
node = *ioNode;
|
|
parent = node->GetParentNode();
|
|
if (!parent) {
|
|
done = true;
|
|
} else {
|
|
// passing parent as last param to GetPromotedPoint() allows it to promote
|
|
// only one level up the hierarchy.
|
|
rv = GetPromotedPoint(kStart, *ioNode, *ioStartOffset,
|
|
address_of(frontNode), &frontOffset, parent);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
// then we make the same attempt with the endpoint
|
|
rv = GetPromotedPoint(kEnd, *ioNode, *ioEndOffset, address_of(endNode),
|
|
&endOffset, parent);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
// if both endpoints were promoted one level and isEditable is the same as
|
|
// the original node, keep looping - otherwise we are done.
|
|
if ((frontNode != parent) || (endNode != parent) ||
|
|
(frontNode->IsEditable() != isEditable))
|
|
done = true;
|
|
else {
|
|
*ioNode = frontNode;
|
|
*ioStartOffset = frontOffset;
|
|
*ioEndOffset = endOffset;
|
|
}
|
|
}
|
|
}
|
|
return rv;
|
|
}
|
|
|
|
nsresult nsHTMLCopyEncoder::GetPromotedPoint(Endpoint aWhere, nsINode* aNode,
|
|
int32_t aOffset,
|
|
nsCOMPtr<nsINode>* outNode,
|
|
int32_t* outOffset,
|
|
nsINode* common) {
|
|
nsresult rv = NS_OK;
|
|
nsCOMPtr<nsINode> node = aNode;
|
|
nsCOMPtr<nsINode> parent = aNode;
|
|
int32_t offset = aOffset;
|
|
bool bResetPromotion = false;
|
|
|
|
// default values
|
|
*outNode = node;
|
|
*outOffset = offset;
|
|
|
|
if (common == node) return NS_OK;
|
|
|
|
if (aWhere == kStart) {
|
|
// some special casing for text nodes
|
|
if (auto nodeAsText = aNode->GetAsText()) {
|
|
// if not at beginning of text node, we are done
|
|
if (offset > 0) {
|
|
// unless everything before us in just whitespace. NOTE: we need a more
|
|
// general solution that truly detects all cases of non-significant
|
|
// whitesace with no false alarms.
|
|
nsAutoString text;
|
|
nodeAsText->SubstringData(0, offset, text, IgnoreErrors());
|
|
text.CompressWhitespace();
|
|
if (!text.IsEmpty()) return NS_OK;
|
|
bResetPromotion = true;
|
|
}
|
|
// else
|
|
rv = GetNodeLocation(aNode, address_of(parent), &offset);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
} else {
|
|
node = GetChildAt(parent, offset);
|
|
}
|
|
if (!node) node = parent;
|
|
|
|
// finding the real start for this point. look up the tree for as long as
|
|
// we are the first node in the container, and as long as we haven't hit the
|
|
// body node.
|
|
if (!IsRoot(node) && (parent != common)) {
|
|
rv = GetNodeLocation(node, address_of(parent), &offset);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
if (offset == -1) return NS_OK; // we hit generated content; STOP
|
|
while ((IsFirstNode(node)) && (!IsRoot(parent)) && (parent != common)) {
|
|
if (bResetPromotion) {
|
|
nsCOMPtr<nsIContent> content = nsIContent::FromNodeOrNull(parent);
|
|
if (content && content->IsHTMLElement()) {
|
|
if (nsHTMLElement::IsBlock(
|
|
nsHTMLTags::AtomTagToId(content->NodeInfo()->NameAtom()))) {
|
|
bResetPromotion = false;
|
|
}
|
|
}
|
|
}
|
|
|
|
node = parent;
|
|
rv = GetNodeLocation(node, address_of(parent), &offset);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
if (offset == -1) // we hit generated content; STOP
|
|
{
|
|
// back up a bit
|
|
parent = node;
|
|
offset = 0;
|
|
break;
|
|
}
|
|
}
|
|
if (bResetPromotion) {
|
|
*outNode = aNode;
|
|
*outOffset = aOffset;
|
|
} else {
|
|
*outNode = parent;
|
|
*outOffset = offset;
|
|
}
|
|
return rv;
|
|
}
|
|
}
|
|
|
|
if (aWhere == kEnd) {
|
|
// some special casing for text nodes
|
|
if (auto nodeAsText = aNode->GetAsText()) {
|
|
// if not at end of text node, we are done
|
|
uint32_t len = aNode->Length();
|
|
if (offset < (int32_t)len) {
|
|
// unless everything after us in just whitespace. NOTE: we need a more
|
|
// general solution that truly detects all cases of non-significant
|
|
// whitespace with no false alarms.
|
|
nsAutoString text;
|
|
nodeAsText->SubstringData(offset, len - offset, text, IgnoreErrors());
|
|
text.CompressWhitespace();
|
|
if (!text.IsEmpty()) return NS_OK;
|
|
bResetPromotion = true;
|
|
}
|
|
rv = GetNodeLocation(aNode, address_of(parent), &offset);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
} else {
|
|
if (offset) offset--; // we want node _before_ offset
|
|
node = GetChildAt(parent, offset);
|
|
}
|
|
if (!node) node = parent;
|
|
|
|
// finding the real end for this point. look up the tree for as long as we
|
|
// are the last node in the container, and as long as we haven't hit the
|
|
// body node.
|
|
if (!IsRoot(node) && (parent != common)) {
|
|
rv = GetNodeLocation(node, address_of(parent), &offset);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
if (offset == -1) return NS_OK; // we hit generated content; STOP
|
|
while ((IsLastNode(node)) && (!IsRoot(parent)) && (parent != common)) {
|
|
if (bResetPromotion) {
|
|
nsCOMPtr<nsIContent> content = nsIContent::FromNodeOrNull(parent);
|
|
if (content && content->IsHTMLElement()) {
|
|
if (nsHTMLElement::IsBlock(
|
|
nsHTMLTags::AtomTagToId(content->NodeInfo()->NameAtom()))) {
|
|
bResetPromotion = false;
|
|
}
|
|
}
|
|
}
|
|
|
|
node = parent;
|
|
rv = GetNodeLocation(node, address_of(parent), &offset);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
if (offset == -1) // we hit generated content; STOP
|
|
{
|
|
// back up a bit
|
|
parent = node;
|
|
offset = 0;
|
|
break;
|
|
}
|
|
}
|
|
if (bResetPromotion) {
|
|
*outNode = aNode;
|
|
*outOffset = aOffset;
|
|
} else {
|
|
*outNode = parent;
|
|
offset++; // add one since this in an endpoint - want to be AFTER node.
|
|
*outOffset = offset;
|
|
}
|
|
return rv;
|
|
}
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
nsCOMPtr<nsINode> nsHTMLCopyEncoder::GetChildAt(nsINode* aParent,
|
|
int32_t aOffset) {
|
|
nsCOMPtr<nsINode> resultNode;
|
|
|
|
if (!aParent) return resultNode;
|
|
|
|
nsCOMPtr<nsIContent> content = nsIContent::FromNodeOrNull(aParent);
|
|
MOZ_ASSERT(content, "null content in nsHTMLCopyEncoder::GetChildAt");
|
|
|
|
resultNode = content->GetChildAt_Deprecated(aOffset);
|
|
|
|
return resultNode;
|
|
}
|
|
|
|
bool nsHTMLCopyEncoder::IsMozBR(Element* aElement) {
|
|
HTMLBRElement* brElement = HTMLBRElement::FromNodeOrNull(aElement);
|
|
return brElement && brElement->IsPaddingForEmptyLastLine();
|
|
}
|
|
|
|
nsresult nsHTMLCopyEncoder::GetNodeLocation(nsINode* inChild,
|
|
nsCOMPtr<nsINode>* outParent,
|
|
int32_t* outOffset) {
|
|
NS_ASSERTION((inChild && outParent && outOffset), "bad args");
|
|
if (inChild && outParent && outOffset) {
|
|
nsCOMPtr<nsIContent> child = nsIContent::FromNodeOrNull(inChild);
|
|
if (!child) {
|
|
return NS_ERROR_NULL_POINTER;
|
|
}
|
|
|
|
nsIContent* parent = child->GetParent();
|
|
if (!parent) {
|
|
return NS_ERROR_NULL_POINTER;
|
|
}
|
|
|
|
*outParent = parent;
|
|
*outOffset = parent->ComputeIndexOf(child);
|
|
return NS_OK;
|
|
}
|
|
return NS_ERROR_NULL_POINTER;
|
|
}
|
|
|
|
bool nsHTMLCopyEncoder::IsRoot(nsINode* aNode) {
|
|
nsCOMPtr<nsIContent> content = nsIContent::FromNodeOrNull(aNode);
|
|
if (!content) {
|
|
return false;
|
|
}
|
|
|
|
if (mIsTextWidget) {
|
|
return content->IsHTMLElement(nsGkAtoms::div);
|
|
}
|
|
|
|
return content->IsAnyOfHTMLElements(nsGkAtoms::body, nsGkAtoms::td,
|
|
nsGkAtoms::th);
|
|
}
|
|
|
|
bool nsHTMLCopyEncoder::IsFirstNode(nsINode* aNode) {
|
|
// need to check if any nodes before us are really visible.
|
|
// Mike wrote something for me along these lines in nsSelectionController,
|
|
// but I don't think it's ready for use yet - revisit.
|
|
// HACK: for now, simply consider all whitespace text nodes to be
|
|
// invisible formatting nodes.
|
|
for (nsIContent* sibling = aNode->GetPreviousSibling(); sibling;
|
|
sibling = sibling->GetPreviousSibling()) {
|
|
if (!sibling->TextIsOnlyWhitespace()) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
bool nsHTMLCopyEncoder::IsLastNode(nsINode* aNode) {
|
|
// need to check if any nodes after us are really visible.
|
|
// Mike wrote something for me along these lines in nsSelectionController,
|
|
// but I don't think it's ready for use yet - revisit.
|
|
// HACK: for now, simply consider all whitespace text nodes to be
|
|
// invisible formatting nodes.
|
|
for (nsIContent* sibling = aNode->GetNextSibling(); sibling;
|
|
sibling = sibling->GetNextSibling()) {
|
|
if (sibling->IsElement() && IsMozBR(sibling->AsElement())) {
|
|
// we ignore trailing moz BRs.
|
|
continue;
|
|
}
|
|
if (!sibling->TextIsOnlyWhitespace()) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
already_AddRefed<nsIDocumentEncoder> do_createHTMLCopyEncoder() {
|
|
return do_AddRef(new nsHTMLCopyEncoder);
|
|
}
|
|
|
|
int32_t nsHTMLCopyEncoder::RangeNodeContext::GetImmediateContextCount(
|
|
const nsTArray<nsINode*>& aAncestorArray) const {
|
|
int32_t i = aAncestorArray.Length(), j = 0;
|
|
while (j < i) {
|
|
nsINode* node = aAncestorArray.ElementAt(j);
|
|
if (!node) {
|
|
break;
|
|
}
|
|
nsCOMPtr<nsIContent> content(nsIContent::FromNodeOrNull(node));
|
|
if (!content || !content->IsAnyOfHTMLElements(
|
|
nsGkAtoms::tr, nsGkAtoms::thead, nsGkAtoms::tbody,
|
|
nsGkAtoms::tfoot, nsGkAtoms::table)) {
|
|
break;
|
|
}
|
|
++j;
|
|
}
|
|
return j;
|
|
}
|