1 files changed, 91 insertions, 0 deletions
diff --git a/Source/WebCore/rendering/SelectionSubtreeRoot.cpp b/Source/WebCore/rendering/SelectionSubtreeRoot.cpp
new file mode 100644
index 000000000..181e6b527
--- /dev/null
+++ b/Source/WebCore/rendering/SelectionSubtreeRoot.cpp
@@ -0,0 +1,91 @@
+/*
+ * Copyright (C) 2014 Igalia S.L.
+ * Copyright (C) 2015 Apple 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:
+ *
+ * 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 THE COPYRIGHT HOLDER “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 HOLDER 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 "SelectionSubtreeRoot.h"
+
+#include "Document.h"
+#include "Position.h"
+#include "Range.h"
+#include "VisibleSelection.h"
+
+namespace WebCore {
+
+SelectionSubtreeRoot::SelectionSubtreeRoot()
+{
+}
+
+void SelectionSubtreeRoot::adjustForVisibleSelection(Document& document)
+{
+    if (m_selectionSubtreeData.selectionClear())
+        return;
+
+    // Create a range based on the cached end points
+    auto selectionStart = m_selectionSubtreeData.selectionStartPos().value();
+    auto selectionEnd = m_selectionSubtreeData.selectionEndPos().value();
+    Position startPosition = createLegacyEditingPosition(m_selectionSubtreeData.selectionStart()->node(), selectionStart);
+    Position endPosition = createLegacyEditingPosition(m_selectionSubtreeData.selectionEnd()->node(), selectionEnd);
+
+    RefPtr<Range> range = Range::create(document, startPosition.parentAnchoredEquivalent(), endPosition.parentAnchoredEquivalent());
+    VisibleSelection selection(*range);
+    Position startPos = selection.start();
+    Position candidate = startPos.downstream();
+    if (candidate.isCandidate())
+        startPos = candidate;
+
+    Position endPos = selection.end();
+    candidate = endPos.upstream();
+    if (candidate.isCandidate())
+        endPos = candidate;
+
+    m_selectionSubtreeData.clearSelection();
+
+    if (startPos.isNull() || endPos.isNull())
+        return;
+
+    if (selection.visibleStart() == selection.visibleEnd())
+        return;
+
+    if (startPos.deprecatedNode()->renderer()->flowThreadContainingBlock() != endPos.deprecatedNode()->renderer()->flowThreadContainingBlock())
+        return;
+
+    if (&startPos.deprecatedNode()->renderer()->selectionRoot() != this)
+        return;
+
+    auto newStartPos = startPos.deprecatedEditingOffset();
+    auto newEndPos = endPos.deprecatedEditingOffset();
+    ASSERT(newStartPos >= 0 && newEndPos >= 0);
+    m_selectionSubtreeData.setSelectionStart(startPos.deprecatedNode()->renderer());
+    m_selectionSubtreeData.setSelectionStartPos(newStartPos);
+    m_selectionSubtreeData.setSelectionEnd(endPos.deprecatedNode()->renderer());
+    m_selectionSubtreeData.setSelectionEndPos(newEndPos);
+}
+
+} // namespace WebCore