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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=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 "xpcAccessiblePivot.h"
#include "xpcAccessibleDocument.h"
#include "Pivot.h"
using namespace mozilla::a11y;
using mozilla::DebugOnly;
/**
* An object that stores a given traversal rule during the pivot movement.
*/
class xpcPivotRule : public PivotRule {
public:
explicit xpcPivotRule(nsIAccessibleTraversalRule* aRule) : mRule(aRule) {}
~xpcPivotRule() {}
virtual uint16_t Match(Accessible* aAcc) override;
private:
nsCOMPtr<nsIAccessibleTraversalRule> mRule;
};
////////////////////////////////////////////////////////////////////////////////
// xpcAccessiblePivot
xpcAccessiblePivot::xpcAccessiblePivot(nsIAccessible* aRoot) : mRoot(aRoot) {
NS_ASSERTION(aRoot, "A root accessible is required");
}
xpcAccessiblePivot::~xpcAccessiblePivot() {}
////////////////////////////////////////////////////////////////////////////////
// nsISupports
NS_IMPL_CYCLE_COLLECTION(xpcAccessiblePivot, mRoot)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(xpcAccessiblePivot)
NS_INTERFACE_MAP_ENTRY(nsIAccessiblePivot)
NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIAccessiblePivot)
NS_INTERFACE_MAP_END
NS_IMPL_CYCLE_COLLECTING_ADDREF(xpcAccessiblePivot)
NS_IMPL_CYCLE_COLLECTING_RELEASE(xpcAccessiblePivot)
////////////////////////////////////////////////////////////////////////////////
// nsIAccessiblePivot
NS_IMETHODIMP
xpcAccessiblePivot::Next(nsIAccessible* aAnchor,
nsIAccessibleTraversalRule* aRule, bool aIncludeStart,
uint8_t aArgc, nsIAccessible** aResult) {
NS_ENSURE_ARG(aResult);
NS_ENSURE_ARG(aRule);
Accessible* root = Root();
Accessible* anchor = aAnchor->ToInternalGeneric();
NS_ENSURE_TRUE(root && anchor, NS_ERROR_NOT_IN_TREE);
Pivot pivot(Root());
xpcPivotRule rule(aRule);
Accessible* result =
pivot.Next(anchor, rule, (aArgc > 0) ? aIncludeStart : false);
NS_IF_ADDREF(*aResult = ToXPC(result));
return NS_OK;
}
NS_IMETHODIMP
xpcAccessiblePivot::Prev(nsIAccessible* aAnchor,
nsIAccessibleTraversalRule* aRule, bool aIncludeStart,
uint8_t aArgc, nsIAccessible** aResult) {
NS_ENSURE_ARG(aResult);
NS_ENSURE_ARG(aRule);
Accessible* root = Root();
Accessible* anchor = aAnchor->ToInternalGeneric();
NS_ENSURE_TRUE(root && anchor, NS_ERROR_NOT_IN_TREE);
Pivot pivot(Root());
xpcPivotRule rule(aRule);
Accessible* result =
pivot.Prev(anchor, rule, (aArgc > 0) ? aIncludeStart : false);
NS_IF_ADDREF(*aResult = ToXPC(result));
return NS_OK;
}
NS_IMETHODIMP
xpcAccessiblePivot::First(nsIAccessibleTraversalRule* aRule,
nsIAccessible** aResult) {
NS_ENSURE_ARG(aResult);
NS_ENSURE_ARG(aRule);
Accessible* root = Root();
NS_ENSURE_TRUE(root, NS_ERROR_NOT_IN_TREE);
Pivot pivot(root);
xpcPivotRule rule(aRule);
Accessible* result = pivot.First(rule);
NS_IF_ADDREF(*aResult = ToXPC(result));
return NS_OK;
}
NS_IMETHODIMP
xpcAccessiblePivot::Last(nsIAccessibleTraversalRule* aRule,
nsIAccessible** aResult) {
NS_ENSURE_ARG(aResult);
NS_ENSURE_ARG(aRule);
Accessible* root = Root();
NS_ENSURE_TRUE(root, NS_ERROR_NOT_IN_TREE);
Pivot pivot(root);
xpcPivotRule rule(aRule);
Accessible* result = pivot.Last(rule);
NS_IF_ADDREF(*aResult = ToXPC(result));
return NS_OK;
}
NS_IMETHODIMP
xpcAccessiblePivot::AtPoint(int32_t aX, int32_t aY,
nsIAccessibleTraversalRule* aRule,
nsIAccessible** aResult) {
NS_ENSURE_ARG_POINTER(aResult);
NS_ENSURE_ARG_POINTER(aRule);
Accessible* root = Root();
NS_ENSURE_TRUE(root, NS_ERROR_NOT_IN_TREE);
xpcPivotRule rule(aRule);
Pivot pivot(root);
Accessible* result = pivot.AtPoint(aX, aY, rule);
NS_IF_ADDREF(*aResult = ToXPC(result));
return NS_OK;
}
uint16_t xpcPivotRule::Match(Accessible* aAcc) {
uint16_t matchResult = nsIAccessibleTraversalRule::FILTER_IGNORE;
DebugOnly<nsresult> rv = mRule->Match(ToXPC(aAcc), &matchResult);
MOZ_ASSERT(NS_SUCCEEDED(rv));
return matchResult;
}
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