mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
115 lines
2.9 KiB
C++
115 lines
2.9 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "DocAccessibleParent.h"
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#include "nsAutoPtr.h"
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#include "mozilla/a11y/Platform.h"
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namespace mozilla {
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namespace a11y {
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bool
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DocAccessibleParent::RecvShowEvent(const ShowEventData& aData)
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{
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if (aData.NewTree().IsEmpty()) {
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NS_ERROR("no children being added");
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return false;
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}
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ProxyAccessible* parent = nullptr;
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if (aData.ID()) {
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ProxyEntry* e = mAccessibles.GetEntry(aData.ID());
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if (e)
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parent = e->mProxy;
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} else {
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parent = this;
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}
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// XXX This should really never happen, but sometimes we fail to fire the
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// required show events.
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if (!parent) {
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NS_ERROR("adding child to unknown accessible");
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return false;
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}
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uint32_t newChildIdx = aData.Idx();
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if (newChildIdx > parent->ChildrenCount()) {
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NS_ERROR("invalid index to add child at");
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return false;
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}
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uint32_t consumed = AddSubtree(parent, aData.NewTree(), 0, newChildIdx);
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MOZ_ASSERT(consumed == aData.NewTree().Length());
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for (uint32_t i = 0; i < consumed; i++) {
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uint64_t id = aData.NewTree()[i].ID();
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MOZ_ASSERT(mAccessibles.GetEntry(id));
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}
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return consumed;
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}
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uint32_t
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DocAccessibleParent::AddSubtree(ProxyAccessible* aParent,
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const nsTArray<a11y::AccessibleData>& aNewTree,
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uint32_t aIdx, uint32_t aIdxInParent)
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{
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if (aNewTree.Length() <= aIdx) {
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NS_ERROR("bad index in serialized tree!");
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return 0;
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}
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const AccessibleData& newChild = aNewTree[aIdx];
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if (newChild.Role() > roles::LAST_ROLE) {
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NS_ERROR("invalid role");
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return 0;
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}
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auto role = static_cast<a11y::role>(newChild.Role());
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ProxyAccessible* newProxy =
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new ProxyAccessible(newChild.ID(), aParent, this, role);
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aParent->AddChildAt(aIdxInParent, newProxy);
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mAccessibles.PutEntry(newChild.ID())->mProxy = newProxy;
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ProxyCreated(newProxy);
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uint32_t accessibles = 1;
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uint32_t kids = newChild.ChildrenCount();
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for (uint32_t i = 0; i < kids; i++) {
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uint32_t consumed = AddSubtree(newProxy, aNewTree, aIdx + accessibles, i);
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if (!consumed)
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return 0;
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accessibles += consumed;
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}
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MOZ_ASSERT(newProxy->ChildrenCount() == kids);
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return accessibles;
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}
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bool
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DocAccessibleParent::RecvHideEvent(const uint64_t& aRootID)
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{
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ProxyEntry* rootEntry = mAccessibles.GetEntry(aRootID);
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if (!rootEntry) {
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NS_ERROR("invalid root being removed!");
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return true;
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}
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ProxyAccessible* root = rootEntry->mProxy;
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if (!root) {
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NS_ERROR("invalid root being removed!");
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return true;
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}
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ProxyAccessible* parent = root->Parent();
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parent->RemoveChild(root);
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root->Shutdown();
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return true;
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}
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}
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}
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