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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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 "mozilla/EditorUtils.h"
#include "mozilla/OwningNonNull.h"
#include "mozilla/dom/Selection.h"
#include "nsComponentManagerUtils.h"
#include "nsError.h"
#include "nsIClipboardDragDropHookList.h"
// hooks
#include "nsIClipboardDragDropHooks.h"
#include "nsIContent.h"
#include "nsIContentIterator.h"
#include "nsIDOMDocument.h"
#include "nsIDocShell.h"
#include "nsIDocument.h"
#include "nsIInterfaceRequestorUtils.h"
#include "nsINode.h"
#include "nsISimpleEnumerator.h"
class nsISupports;
class nsRange;
namespace mozilla {
using namespace dom;
/******************************************************************************
* AutoSelectionRestorer
*****************************************************************************/
AutoSelectionRestorer::AutoSelectionRestorer(
Selection* aSelection,
EditorBase* aEditorBase
MOZ_GUARD_OBJECT_NOTIFIER_PARAM_IN_IMPL)
: mEditorBase(nullptr)
{
MOZ_GUARD_OBJECT_NOTIFIER_INIT;
if (NS_WARN_IF(!aSelection) || NS_WARN_IF(!aEditorBase)) {
return;
}
if (aEditorBase->ArePreservingSelection()) {
// We already have initialized mSavedSel, so this must be nested call.
return;
}
mSelection = aSelection;
mEditorBase = aEditorBase;
mEditorBase->PreserveSelectionAcrossActions(mSelection);
}
AutoSelectionRestorer::~AutoSelectionRestorer()
{
NS_ASSERTION(!mSelection || mEditorBase,
"mEditorBase should be non-null when mSelection is");
// mSelection will be null if this was nested call.
if (mSelection && mEditorBase->ArePreservingSelection()) {
mEditorBase->RestorePreservedSelection(mSelection);
}
}
void
AutoSelectionRestorer::Abort()
{
NS_ASSERTION(!mSelection || mEditorBase,
"mEditorBase should be non-null when mSelection is");
if (mSelection) {
mEditorBase->StopPreservingSelection();
}
}
/******************************************************************************
* some helper classes for iterating the dom tree
*****************************************************************************/
DOMIterator::DOMIterator(nsINode& aNode MOZ_GUARD_OBJECT_NOTIFIER_PARAM_IN_IMPL)
{
MOZ_GUARD_OBJECT_NOTIFIER_INIT;
mIter = NS_NewContentIterator();
DebugOnly<nsresult> rv = mIter->Init(&aNode);
MOZ_ASSERT(NS_SUCCEEDED(rv));
}
nsresult
DOMIterator::Init(nsRange& aRange)
{
mIter = NS_NewContentIterator();
return mIter->Init(&aRange);
}
DOMIterator::DOMIterator(MOZ_GUARD_OBJECT_NOTIFIER_ONLY_PARAM_IN_IMPL)
{
MOZ_GUARD_OBJECT_NOTIFIER_INIT;
}
DOMIterator::~DOMIterator()
{
}
void
DOMIterator::AppendList(const BoolDomIterFunctor& functor,
nsTArray<OwningNonNull<nsINode>>& arrayOfNodes) const
{
// Iterate through dom and build list
for (; !mIter->IsDone(); mIter->Next()) {
nsCOMPtr<nsINode> node = mIter->GetCurrentNode();
if (functor(node)) {
arrayOfNodes.AppendElement(*node);
}
}
}
DOMSubtreeIterator::DOMSubtreeIterator(
MOZ_GUARD_OBJECT_NOTIFIER_ONLY_PARAM_IN_IMPL)
: DOMIterator(MOZ_GUARD_OBJECT_NOTIFIER_ONLY_PARAM_TO_PARENT)
{
}
nsresult
DOMSubtreeIterator::Init(nsRange& aRange)
{
mIter = NS_NewContentSubtreeIterator();
return mIter->Init(&aRange);
}
DOMSubtreeIterator::~DOMSubtreeIterator()
{
}
/******************************************************************************
* some general purpose editor utils
*****************************************************************************/
bool
EditorUtils::IsDescendantOf(nsINode* aNode,
nsINode* aParent,
int32_t* aOffset)
{
MOZ_ASSERT(aNode && aParent);
if (aNode == aParent) {
return false;
}
for (nsCOMPtr<nsINode> node = aNode; node; node = node->GetParentNode()) {
if (node->GetParentNode() == aParent) {
if (aOffset) {
*aOffset = aParent->IndexOf(node);
}
return true;
}
}
return false;
}
bool
EditorUtils::IsDescendantOf(nsIDOMNode* aNode,
nsIDOMNode* aParent,
int32_t* aOffset)
{
nsCOMPtr<nsINode> node = do_QueryInterface(aNode);
nsCOMPtr<nsINode> parent = do_QueryInterface(aParent);
NS_ENSURE_TRUE(node && parent, false);
return IsDescendantOf(node, parent, aOffset);
}
bool
EditorUtils::IsLeafNode(nsIDOMNode* aNode)
{
bool hasChildren = false;
if (aNode)
aNode->HasChildNodes(&hasChildren);
return !hasChildren;
}
/******************************************************************************
* utility methods for drag/drop/copy/paste hooks
*****************************************************************************/
nsresult
EditorHookUtils::GetHookEnumeratorFromDocument(nsIDOMDocument* aDoc,
nsISimpleEnumerator** aResult)
{
nsCOMPtr<nsIDocument> doc = do_QueryInterface(aDoc);
NS_ENSURE_TRUE(doc, NS_ERROR_FAILURE);
nsCOMPtr<nsIDocShell> docShell = doc->GetDocShell();
nsCOMPtr<nsIClipboardDragDropHookList> hookObj = do_GetInterface(docShell);
NS_ENSURE_TRUE(hookObj, NS_ERROR_FAILURE);
return hookObj->GetHookEnumerator(aResult);
}
bool
EditorHookUtils::DoInsertionHook(nsIDOMDocument* aDoc,
nsIDOMEvent* aDropEvent,
nsITransferable *aTrans)
{
nsCOMPtr<nsISimpleEnumerator> enumerator;
GetHookEnumeratorFromDocument(aDoc, getter_AddRefs(enumerator));
NS_ENSURE_TRUE(enumerator, true);
bool hasMoreHooks = false;
while (NS_SUCCEEDED(enumerator->HasMoreElements(&hasMoreHooks)) &&
hasMoreHooks) {
nsCOMPtr<nsISupports> isupp;
if (NS_FAILED(enumerator->GetNext(getter_AddRefs(isupp)))) {
break;
}
nsCOMPtr<nsIClipboardDragDropHooks> override = do_QueryInterface(isupp);
if (override) {
bool doInsert = true;
DebugOnly<nsresult> hookResult =
override->OnPasteOrDrop(aDropEvent, aTrans, &doInsert);
NS_ASSERTION(NS_SUCCEEDED(hookResult), "hook failure in OnPasteOrDrop");
NS_ENSURE_TRUE(doInsert, false);
}
}
return true;
}
} // namespace mozilla
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