Remove the concept of document.documentElement

sky/engine/core/editing/SurroundingText.cpp

Index: sky/engine/core/editing/SurroundingText.cpp
diff --git a/sky/engine/core/editing/SurroundingText.cpp b/sky/engine/core/editing/SurroundingText.cpp
deleted file mode 100644
index dd23f2e355abfa4ee0719cc23bd1f334376c1e17..0000000000000000000000000000000000000000
--- a/sky/engine/core/editing/SurroundingText.cpp
+++ /dev/null
@@ -1,142 +0,0 @@
-/*
- * Copyright (C) 2012 Google Inc. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include "sky/engine/config.h"
-#include "sky/engine/core/editing/SurroundingText.h"
-
-#include "sky/engine/core/dom/Document.h"
-#include "sky/engine/core/dom/Element.h"
-#include "sky/engine/core/dom/Position.h"
-#include "sky/engine/core/dom/Range.h"
-#include "sky/engine/core/editing/TextIterator.h"
-
-namespace blink {
-
-SurroundingText::SurroundingText(const Range& range, unsigned maxLength)
-    : m_startOffsetInContent(0)
-    , m_endOffsetInContent(0)
-{
-    initialize(range.startPosition(), range.endPosition(), maxLength);
-}
-
-SurroundingText::SurroundingText(const Position& position, unsigned maxLength)
-    : m_startOffsetInContent(0)
-    , m_endOffsetInContent(0)
-{
-    initialize(position, position, maxLength);
-}
-
-void SurroundingText::initialize(const Position& startPosition, const Position& endPosition, unsigned maxLength)
-{
-    ASSERT(startPosition.document() == endPosition.document());
-
-    const unsigned halfMaxLength = maxLength / 2;
-
-    Document* document = startPosition.document();
-    // The position will have no document if it is null (as in no position).
-    if (!document)
-        return;
-
-    // The forward range starts at the selection end and ends at the document's
-    // end. It will then be updated to only contain the text in the text in the
-    // right range around the selection.
-    RefPtr<Range> forwardRange = Range::create(*document, endPosition, lastPositionInNode(document->documentElement()).parentAnchoredEquivalent());
-    CharacterIterator forwardIterator(forwardRange.get());
-    // FIXME: why do we stop going trough the text if we were not able to select something on the right?
-    if (!forwardIterator.atEnd())
-        forwardIterator.advance(maxLength - halfMaxLength);
-
-    forwardRange = forwardIterator.range();
-    if (!forwardRange || !Range::create(*document, endPosition, forwardRange->startPosition())->text().length()) {
-        ASSERT(forwardRange);
-        return;
-    }
-
-    // Same as with the forward range but with the backward range. The range
-    // starts at the document's start and ends at the selection start and will
-    // be updated.
-    RefPtr<Range> backwardsRange = Range::create(*document, firstPositionInNode(document->documentElement()).parentAnchoredEquivalent(), startPosition);
-    BackwardsCharacterIterator backwardsIterator(backwardsRange.get());
-    if (!backwardsIterator.atEnd())
-        backwardsIterator.advance(halfMaxLength);
-
-    backwardsRange = backwardsIterator.range();
-    if (!backwardsRange) {
-        ASSERT(backwardsRange);
-        return;
-    }
-
-    m_startOffsetInContent = Range::create(*document, backwardsRange->endPosition(), startPosition)->text().length();
-    m_endOffsetInContent = Range::create(*document, backwardsRange->endPosition(), endPosition)->text().length();
-    m_contentRange = Range::create(*document, backwardsRange->endPosition(), forwardRange->startPosition());
-    ASSERT(m_contentRange);
-}
-
-PassRefPtr<Range> SurroundingText::rangeFromContentOffsets(unsigned startOffsetInContent, unsigned endOffsetInContent)
-{
-    if (startOffsetInContent >= endOffsetInContent || endOffsetInContent > content().length())
-        return nullptr;
-
-    CharacterIterator iterator(m_contentRange.get());
-
-    ASSERT(!iterator.atEnd());
-    iterator.advance(startOffsetInContent);
-
-    ASSERT(iterator.range());
-    Position start = iterator.range()->startPosition();
-
-    ASSERT(!iterator.atEnd());
-    iterator.advance(endOffsetInContent - startOffsetInContent);
-
-    ASSERT(iterator.range());
-    Position end = iterator.range()->startPosition();
-
-    ASSERT(start.document());
-    return Range::create(*start.document(), start, end);
-}
-
-String SurroundingText::content() const
-{
-    if (m_contentRange)
-        return m_contentRange->text();
-    return String();
-}
-
-unsigned SurroundingText::startOffsetInContent() const
-{
-    return m_startOffsetInContent;
-}
-
-unsigned SurroundingText::endOffsetInContent() const
-{
-    return m_endOffsetInContent;
-}
-
-} // namespace blink