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-rw-r--r--layout/xul/tree/nsTreeUtils.cpp135
1 files changed, 135 insertions, 0 deletions
diff --git a/layout/xul/tree/nsTreeUtils.cpp b/layout/xul/tree/nsTreeUtils.cpp
new file mode 100644
index 0000000000..10767e22d2
--- /dev/null
+++ b/layout/xul/tree/nsTreeUtils.cpp
@@ -0,0 +1,135 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "nsReadableUtils.h"
+#include "nsTreeUtils.h"
+#include "ChildIterator.h"
+#include "nsCRT.h"
+#include "nsAtom.h"
+#include "nsNameSpaceManager.h"
+#include "nsGkAtoms.h"
+#include "nsIContent.h"
+
+using namespace mozilla;
+
+nsresult nsTreeUtils::TokenizeProperties(const nsAString& aProperties,
+ AtomArray& aPropertiesArray) {
+ nsAString::const_iterator end;
+ aProperties.EndReading(end);
+
+ nsAString::const_iterator iter;
+ aProperties.BeginReading(iter);
+
+ do {
+ // Skip whitespace
+ while (iter != end && nsCRT::IsAsciiSpace(*iter)) ++iter;
+
+ // If only whitespace, we're done
+ if (iter == end) break;
+
+ // Note the first non-whitespace character
+ nsAString::const_iterator first = iter;
+
+ // Advance to the next whitespace character
+ while (iter != end && !nsCRT::IsAsciiSpace(*iter)) ++iter;
+
+ // XXX this would be nonsensical
+ NS_ASSERTION(iter != first, "eh? something's wrong here");
+ if (iter == first) break;
+
+ RefPtr<nsAtom> atom = NS_Atomize(Substring(first, iter));
+ aPropertiesArray.AppendElement(atom);
+ } while (iter != end);
+
+ return NS_OK;
+}
+
+nsIContent* nsTreeUtils::GetImmediateChild(nsIContent* aContainer,
+ nsAtom* aTag) {
+ dom::FlattenedChildIterator iter(aContainer);
+ for (nsIContent* child = iter.GetNextChild(); child;
+ child = iter.GetNextChild()) {
+ if (child->IsXULElement(aTag)) {
+ return child;
+ }
+ // <slot> is in the flattened tree, but <tree> code is used to work with
+ // <xbl:children> which is not, so recurse in <slot> here.
+ if (child->IsHTMLElement(nsGkAtoms::slot)) {
+ if (nsIContent* c = GetImmediateChild(child, aTag)) {
+ return c;
+ }
+ }
+ }
+
+ return nullptr;
+}
+
+nsIContent* nsTreeUtils::GetDescendantChild(nsIContent* aContainer,
+ nsAtom* aTag) {
+ dom::FlattenedChildIterator iter(aContainer);
+ for (nsIContent* child = iter.GetNextChild(); child;
+ child = iter.GetNextChild()) {
+ if (child->IsXULElement(aTag)) {
+ return child;
+ }
+
+ child = GetDescendantChild(child, aTag);
+ if (child) {
+ return child;
+ }
+ }
+
+ return nullptr;
+}
+
+nsresult nsTreeUtils::UpdateSortIndicators(dom::Element* aColumn,
+ const nsAString& aDirection) {
+ aColumn->SetAttr(kNameSpaceID_None, nsGkAtoms::sortDirection, aDirection,
+ true);
+ aColumn->SetAttr(kNameSpaceID_None, nsGkAtoms::sortActive, u"true"_ns, true);
+
+ // Unset sort attribute(s) on the other columns
+ nsCOMPtr<nsIContent> parentContent = aColumn->GetParent();
+ if (parentContent && parentContent->NodeInfo()->Equals(nsGkAtoms::treecols,
+ kNameSpaceID_XUL)) {
+ for (nsINode* childContent = parentContent->GetFirstChild(); childContent;
+ childContent = childContent->GetNextSibling()) {
+ if (childContent != aColumn &&
+ childContent->NodeInfo()->Equals(nsGkAtoms::treecol,
+ kNameSpaceID_XUL)) {
+ childContent->AsElement()->UnsetAttr(kNameSpaceID_None,
+ nsGkAtoms::sortDirection, true);
+ childContent->AsElement()->UnsetAttr(kNameSpaceID_None,
+ nsGkAtoms::sortActive, true);
+ }
+ }
+ }
+
+ return NS_OK;
+}
+
+nsresult nsTreeUtils::GetColumnIndex(dom::Element* aColumn, int32_t* aResult) {
+ nsIContent* parentContent = aColumn->GetParent();
+ if (parentContent && parentContent->NodeInfo()->Equals(nsGkAtoms::treecols,
+ kNameSpaceID_XUL)) {
+ int32_t colIndex = 0;
+
+ for (nsINode* childContent = parentContent->GetFirstChild(); childContent;
+ childContent = childContent->GetNextSibling()) {
+ if (childContent->NodeInfo()->Equals(nsGkAtoms::treecol,
+ kNameSpaceID_XUL)) {
+ if (childContent == aColumn) {
+ *aResult = colIndex;
+ return NS_OK;
+ }
+ ++colIndex;
+ }
+ }
+ }
+
+ *aResult = -1;
+ return NS_OK;
+}