mirror of
https://github.com/classilla/tenfourfox.git
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215 lines
5.9 KiB
C++
215 lines
5.9 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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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 "nsEditorUtils.h"
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#include "mozilla/OwningNonNull.h"
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#include "mozilla/dom/Selection.h"
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#include "nsComponentManagerUtils.h"
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#include "nsError.h"
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#include "nsIClipboardDragDropHookList.h"
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// hooks
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#include "nsIClipboardDragDropHooks.h"
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#include "nsIContent.h"
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#include "nsIContentIterator.h"
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#include "nsIDOMDocument.h"
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#include "nsIDocShell.h"
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#include "nsIDocument.h"
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#include "nsIInterfaceRequestorUtils.h"
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#include "nsINode.h"
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#include "nsISimpleEnumerator.h"
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class nsISupports;
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class nsRange;
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using namespace mozilla;
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using namespace mozilla::dom;
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/******************************************************************************
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* nsAutoSelectionReset
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*****************************************************************************/
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nsAutoSelectionReset::nsAutoSelectionReset(Selection* aSel, nsEditor* aEd
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MOZ_GUARD_OBJECT_NOTIFIER_PARAM_IN_IMPL)
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: mSel(nullptr), mEd(nullptr)
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{
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MOZ_GUARD_OBJECT_NOTIFIER_INIT;
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if (!aSel || !aEd) return; // not much we can do, bail.
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if (aEd->ArePreservingSelection()) return; // we already have initted mSavedSel, so this must be nested call.
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mSel = aSel;
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mEd = aEd;
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if (mSel)
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{
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mEd->PreserveSelectionAcrossActions(mSel);
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}
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}
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nsAutoSelectionReset::~nsAutoSelectionReset()
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{
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NS_ASSERTION(!mSel || mEd, "mEd should be non-null when mSel is");
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if (mSel && mEd->ArePreservingSelection()) // mSel will be null if this was nested call
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{
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mEd->RestorePreservedSelection(mSel);
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}
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}
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void
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nsAutoSelectionReset::Abort()
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{
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NS_ASSERTION(!mSel || mEd, "mEd should be non-null when mSel is");
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if (mSel)
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mEd->StopPreservingSelection();
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}
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/******************************************************************************
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* some helper classes for iterating the dom tree
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*****************************************************************************/
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nsDOMIterator::nsDOMIterator(nsINode& aNode MOZ_GUARD_OBJECT_NOTIFIER_PARAM_IN_IMPL)
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{
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MOZ_GUARD_OBJECT_NOTIFIER_INIT;
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mIter = NS_NewContentIterator();
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DebugOnly<nsresult> res = mIter->Init(&aNode);
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MOZ_ASSERT(NS_SUCCEEDED(res));
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}
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nsresult
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nsDOMIterator::Init(nsRange& aRange)
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{
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mIter = NS_NewContentIterator();
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return mIter->Init(&aRange);
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}
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nsDOMIterator::nsDOMIterator(MOZ_GUARD_OBJECT_NOTIFIER_ONLY_PARAM_IN_IMPL)
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{
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MOZ_GUARD_OBJECT_NOTIFIER_INIT;
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}
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nsDOMIterator::~nsDOMIterator()
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{
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}
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void
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nsDOMIterator::AppendList(const nsBoolDomIterFunctor& functor,
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nsTArray<OwningNonNull<nsINode>>& arrayOfNodes) const
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{
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// Iterate through dom and build list
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for (; !mIter->IsDone(); mIter->Next()) {
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nsCOMPtr<nsINode> node = mIter->GetCurrentNode();
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if (functor(node)) {
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arrayOfNodes.AppendElement(*node);
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}
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}
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}
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nsDOMSubtreeIterator::nsDOMSubtreeIterator(MOZ_GUARD_OBJECT_NOTIFIER_ONLY_PARAM_IN_IMPL)
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: nsDOMIterator(MOZ_GUARD_OBJECT_NOTIFIER_ONLY_PARAM_TO_PARENT)
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{
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}
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nsresult
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nsDOMSubtreeIterator::Init(nsRange& aRange)
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{
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mIter = NS_NewContentSubtreeIterator();
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return mIter->Init(&aRange);
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}
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nsDOMSubtreeIterator::~nsDOMSubtreeIterator()
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{
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}
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/******************************************************************************
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* some general purpose editor utils
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*****************************************************************************/
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bool
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nsEditorUtils::IsDescendantOf(nsINode* aNode, nsINode* aParent, int32_t* aOffset)
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{
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MOZ_ASSERT(aNode && aParent);
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if (aNode == aParent) {
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return false;
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}
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for (nsCOMPtr<nsINode> node = aNode; node; node = node->GetParentNode()) {
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if (node->GetParentNode() == aParent) {
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if (aOffset) {
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*aOffset = aParent->IndexOf(node);
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}
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return true;
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}
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}
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return false;
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}
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bool
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nsEditorUtils::IsDescendantOf(nsIDOMNode* aNode, nsIDOMNode* aParent, int32_t* aOffset)
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{
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nsCOMPtr<nsINode> node = do_QueryInterface(aNode);
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nsCOMPtr<nsINode> parent = do_QueryInterface(aParent);
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NS_ENSURE_TRUE(node && parent, false);
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return IsDescendantOf(node, parent, aOffset);
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}
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bool
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nsEditorUtils::IsLeafNode(nsIDOMNode *aNode)
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{
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bool hasChildren = false;
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if (aNode)
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aNode->HasChildNodes(&hasChildren);
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return !hasChildren;
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}
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/******************************************************************************
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* utility methods for drag/drop/copy/paste hooks
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*****************************************************************************/
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nsresult
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nsEditorHookUtils::GetHookEnumeratorFromDocument(nsIDOMDocument *aDoc,
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nsISimpleEnumerator **aResult)
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{
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nsCOMPtr<nsIDocument> doc = do_QueryInterface(aDoc);
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NS_ENSURE_TRUE(doc, NS_ERROR_FAILURE);
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nsCOMPtr<nsIDocShell> docShell = doc->GetDocShell();
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nsCOMPtr<nsIClipboardDragDropHookList> hookObj = do_GetInterface(docShell);
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NS_ENSURE_TRUE(hookObj, NS_ERROR_FAILURE);
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return hookObj->GetHookEnumerator(aResult);
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}
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bool
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nsEditorHookUtils::DoInsertionHook(nsIDOMDocument *aDoc, nsIDOMEvent *aDropEvent,
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nsITransferable *aTrans)
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{
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nsCOMPtr<nsISimpleEnumerator> enumerator;
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GetHookEnumeratorFromDocument(aDoc, getter_AddRefs(enumerator));
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NS_ENSURE_TRUE(enumerator, true);
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bool hasMoreHooks = false;
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while (NS_SUCCEEDED(enumerator->HasMoreElements(&hasMoreHooks)) && hasMoreHooks)
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{
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nsCOMPtr<nsISupports> isupp;
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if (NS_FAILED(enumerator->GetNext(getter_AddRefs(isupp))))
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break;
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nsCOMPtr<nsIClipboardDragDropHooks> override = do_QueryInterface(isupp);
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if (override)
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{
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bool doInsert = true;
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#ifdef DEBUG
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nsresult hookResult =
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#endif
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override->OnPasteOrDrop(aDropEvent, aTrans, &doInsert);
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NS_ASSERTION(NS_SUCCEEDED(hookResult), "hook failure in OnPasteOrDrop");
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NS_ENSURE_TRUE(doInsert, false);
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}
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}
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return true;
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}
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