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/*
* Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012 Apple Inc. All rights reserved.
* Copyright (C) 2005 Alexey Proskuryakov.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
*
* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``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 APPLE COMPUTER, INC. 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 "config.h"
#include "core/editing/PlainTextRange.h"
#include "core/dom/ContainerNode.h"
#include "core/dom/Document.h"
#include "core/dom/Range.h"
#include "core/editing/TextIterator.h"
#include "core/editing/VisiblePosition.h"
namespace blink {
PlainTextRange::PlainTextRange()
: m_start(kNotFound)
, m_end(kNotFound)
{
}
PlainTextRange::PlainTextRange(int location)
: m_start(location)
, m_end(location)
{
ASSERT(location >= 0);
}
PlainTextRange::PlainTextRange(int start, int end)
: m_start(start)
, m_end(end)
{
ASSERT(start >= 0);
ASSERT(end >= 0);
ASSERT(start <= end);
}
PassRefPtrWillBeRawPtr<Range> PlainTextRange::createRange(const ContainerNode& scope) const
{
return createRangeFor(scope, ForGeneric);
}
PassRefPtrWillBeRawPtr<Range> PlainTextRange::createRangeForSelection(const ContainerNode& scope) const
{
return createRangeFor(scope, ForSelection);
}
PassRefPtrWillBeRawPtr<Range> PlainTextRange::createRangeFor(const ContainerNode& scope, GetRangeFor getRangeFor) const
{
ASSERT(isNotNull());
RefPtrWillBeRawPtr<Range> resultRange = scope.document().createRange();
size_t docTextPosition = 0;
bool startRangeFound = false;
Position textRunStartPosition;
Position textRunEndPosition;
TextIteratorBehaviorFlags behaviorFlags = TextIteratorEmitsObjectReplacementCharacter;
if (getRangeFor == ForSelection)
behaviorFlags |= TextIteratorEmitsCharactersBetweenAllVisiblePositions;
TextIterator it(rangeOfContents(const_cast<ContainerNode*>(&scope)).get(), behaviorFlags);
// FIXME: the atEnd() check shouldn't be necessary, workaround for <http://bugs.webkit.org/show_bug.cgi?id=6289>.
if (!start() && !length() && it.atEnd()) {
resultRange->setStart(it.startContainer(), 0, ASSERT_NO_EXCEPTION);
resultRange->setEnd(it.startContainer(), 0, ASSERT_NO_EXCEPTION);
return resultRange.release();
}
for (; !it.atEnd(); it.advance()) {
int len = it.length();
textRunStartPosition = it.startPosition();
textRunEndPosition = it.endPosition();
bool foundStart = start() >= docTextPosition && start() <= docTextPosition + len;
bool foundEnd = end() >= docTextPosition && end() <= docTextPosition + len;
// Fix textRunRange->endPosition(), but only if foundStart || foundEnd, because it is only
// in those cases that textRunRange is used.
if (foundEnd) {
// FIXME: This is a workaround for the fact that the end of a run
// is often at the wrong position for emitted '\n's or if the
// renderer of the current node is a replaced element.
if (len == 1 && (it.characterAt(0) == '\n' || it.isInsideReplacedElement())) {
it.advance();
if (!it.atEnd()) {
textRunEndPosition = it.startPosition();
} else {
Position runEnd = VisiblePosition(textRunStartPosition).next().deepEquivalent();
if (runEnd.isNotNull())
textRunEndPosition = createLegacyEditingPosition(runEnd.containerNode(), runEnd.computeOffsetInContainerNode());
}
}
}
if (foundStart) {
startRangeFound = true;
if (textRunStartPosition.containerNode()->isTextNode()) {
int offset = start() - docTextPosition;
resultRange->setStart(textRunStartPosition.containerNode(), offset + textRunStartPosition.offsetInContainerNode(), IGNORE_EXCEPTION);
} else {
if (start() == docTextPosition)
resultRange->setStart(textRunStartPosition.containerNode(), textRunStartPosition.offsetInContainerNode(), IGNORE_EXCEPTION);
else
resultRange->setStart(textRunEndPosition.containerNode(), textRunEndPosition.offsetInContainerNode(), IGNORE_EXCEPTION);
}
}
if (foundEnd) {
if (textRunStartPosition.containerNode()->isTextNode()) {
int offset = end() - docTextPosition;
resultRange->setEnd(textRunStartPosition.containerNode(), offset + textRunStartPosition.offsetInContainerNode(), IGNORE_EXCEPTION);
} else {
if (end() == docTextPosition)
resultRange->setEnd(textRunStartPosition.containerNode(), textRunStartPosition.offsetInContainerNode(), IGNORE_EXCEPTION);
else
resultRange->setEnd(textRunEndPosition.containerNode(), textRunEndPosition.offsetInContainerNode(), IGNORE_EXCEPTION);
}
docTextPosition += len;
break;
}
docTextPosition += len;
}
if (!startRangeFound)
return nullptr;
if (length() && end() > docTextPosition) { // end() is out of bounds
resultRange->setEnd(textRunEndPosition.containerNode(), textRunEndPosition.offsetInContainerNode(), IGNORE_EXCEPTION);
}
return resultRange.release();
}
PlainTextRange PlainTextRange::create(const ContainerNode& scope, const Range& range)
{
if (!range.startContainer())
return PlainTextRange();
// The critical assumption is that this only gets called with ranges that
// concentrate on a given area containing the selection root. This is done
// because of text fields and textareas. The DOM for those is not
// directly in the document DOM, so ensure that the range does not cross a
// boundary of one of those.
if (range.startContainer() != &scope && !range.startContainer()->isDescendantOf(&scope))
return PlainTextRange();
if (range.endContainer() != scope && !range.endContainer()->isDescendantOf(&scope))
return PlainTextRange();
RefPtrWillBeRawPtr<Range> testRange = Range::create(scope.document(), const_cast<ContainerNode*>(&scope), 0, range.startContainer(), range.startOffset());
ASSERT(testRange->startContainer() == &scope);
size_t start = TextIterator::rangeLength(testRange.get());
testRange->setEnd(range.endContainer(), range.endOffset(), IGNORE_EXCEPTION);
ASSERT(testRange->startContainer() == &scope);
size_t end = TextIterator::rangeLength(testRange.get());
return PlainTextRange(start, end);
}
}
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