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// Copyright 2016 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "third_party/blink/renderer/core/dom/static_range.h"
#include "third_party/blink/renderer/bindings/core/v8/v8_static_range_init.h"
#include "third_party/blink/renderer/core/dom/range.h"
#include "third_party/blink/renderer/core/editing/editing_utilities.h"
#include "third_party/blink/renderer/core/editing/ephemeral_range.h"
#include "third_party/blink/renderer/core/frame/local_dom_window.h"
#include "third_party/blink/renderer/core/layout/layout_object.h"
#include "third_party/blink/renderer/platform/bindings/exception_state.h"
#include "third_party/blink/renderer/platform/bindings/script_state.h"
namespace blink {
StaticRange::StaticRange(Document& document,
Node* start_container,
unsigned start_offset,
Node* end_container,
unsigned end_offset)
: owner_document_(document),
start_container_(start_container),
start_offset_(start_offset),
end_container_(end_container),
end_offset_(end_offset) {}
// static
StaticRange* StaticRange::Create(const EphemeralRange& range) {
DCHECK(!range.IsNull());
return MakeGarbageCollected<StaticRange>(
range.GetDocument(), range.StartPosition().ComputeContainerNode(),
range.StartPosition().ComputeOffsetInContainerNode(),
range.EndPosition().ComputeContainerNode(),
range.EndPosition().ComputeOffsetInContainerNode());
}
StaticRange* StaticRange::Create(Document& document,
const StaticRangeInit* static_range_init,
ExceptionState& exception_state) {
DCHECK(static_range_init);
if (static_range_init->startContainer()->IsDocumentTypeNode() ||
static_range_init->startContainer()->IsAttributeNode() ||
static_range_init->endContainer()->IsDocumentTypeNode() ||
static_range_init->endContainer()->IsAttributeNode()) {
exception_state.ThrowDOMException(
DOMExceptionCode::kInvalidNodeTypeError,
"Neither startContainer nor endContainer can be a DocumentType or "
"Attribute node.");
}
return MakeGarbageCollected<StaticRange>(
document, static_range_init->startContainer(),
static_range_init->startOffset(), static_range_init->endContainer(),
static_range_init->endOffset());
}
bool StaticRange::IsValid() const {
if (dom_tree_version_for_is_valid_ == owner_document_->DomTreeVersion())
return is_valid_;
dom_tree_version_for_is_valid_ = owner_document_->DomTreeVersion();
// The full list of checks is:
// 1) The start offset is between 0 and the start container’s node length
// (inclusive).
// 2) The end offset is between 0 and the end container’s node length
// (inclusive).
// 3) The start and end containers of the static range are in the same DOM
// tree.
// 4) The position of the start boundary point is before or equal to the
// position of the end boundary point.
is_valid_ =
start_offset_ <= AbstractRange::LengthOfContents(start_container_) &&
end_offset_ <= AbstractRange::LengthOfContents(end_container_) &&
!HasDifferentRootContainer(start_container_, end_container_) &&
ComparePositionsInDOMTree(start_container_, start_offset_, end_container_,
end_offset_) <= 0;
return is_valid_;
}
Range* StaticRange::toRange(ExceptionState& exception_state) const {
Range* range = Range::Create(*owner_document_.Get());
// Do the offset checking.
range->setStart(start_container_, start_offset_, exception_state);
range->setEnd(end_container_, end_offset_, exception_state);
return range;
}
void StaticRange::Trace(Visitor* visitor) const {
visitor->Trace(owner_document_);
visitor->Trace(start_container_);
visitor->Trace(end_container_);
ScriptWrappable::Trace(visitor);
}
} // namespace blink
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