458 lines
15 KiB
C++
458 lines
15 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 "mozilla/ArrayUtils.h"
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#include "mozilla/MouseEvents.h"
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#include "mozilla/dom/Selection.h"
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#include "nsAString.h"
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#include "nsCOMPtr.h"
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#include "nsCRT.h"
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#include "nsComponentManagerUtils.h"
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#include "nsContentUtils.h"
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#include "nsDebug.h"
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#include "nsEditor.h"
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#include "nsEditorUtils.h"
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#include "nsError.h"
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#include "nsIClipboard.h"
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#include "nsIContent.h"
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#include "nsIDOMDataTransfer.h"
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#include "nsIDOMDocument.h"
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#include "nsIDOMDragEvent.h"
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#include "nsIDOMEvent.h"
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#include "nsIDOMNode.h"
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#include "nsIDOMUIEvent.h"
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#include "nsIDocument.h"
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#include "nsIDragService.h"
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#include "nsIDragSession.h"
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#include "nsIEditor.h"
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#include "nsIEditorIMESupport.h"
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#include "nsIDocShell.h"
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#include "nsIDocShellTreeItem.h"
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#include "nsIPrincipal.h"
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#include "nsIFormControl.h"
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#include "nsIPlaintextEditor.h"
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#include "nsISupportsPrimitives.h"
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#include "nsITransferable.h"
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#include "nsIVariant.h"
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#include "nsLiteralString.h"
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#include "nsPlaintextEditor.h"
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#include "nsRange.h"
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#include "nsSelectionState.h"
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#include "nsServiceManagerUtils.h"
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#include "nsString.h"
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#include "nsXPCOM.h"
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#include "nscore.h"
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class nsILoadContext;
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class nsISupports;
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using namespace mozilla;
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using namespace mozilla::dom;
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NS_IMETHODIMP nsPlaintextEditor::PrepareTransferable(nsITransferable **transferable)
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{
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// Create generic Transferable for getting the data
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nsresult rv = CallCreateInstance("@mozilla.org/widget/transferable;1", transferable);
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NS_ENSURE_SUCCESS(rv, rv);
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// Get the nsITransferable interface for getting the data from the clipboard
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if (transferable) {
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nsCOMPtr<nsIDocument> destdoc = GetDocument();
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nsILoadContext* loadContext = destdoc ? destdoc->GetLoadContext() : nullptr;
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(*transferable)->Init(loadContext);
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(*transferable)->AddDataFlavor(kUnicodeMime);
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(*transferable)->AddDataFlavor(kMozTextInternal);
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};
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return NS_OK;
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}
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nsresult nsPlaintextEditor::InsertTextAt(const nsAString &aStringToInsert,
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nsIDOMNode *aDestinationNode,
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int32_t aDestOffset,
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bool aDoDeleteSelection)
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{
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if (aDestinationNode)
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{
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nsresult res;
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RefPtr<Selection> selection = GetSelection();
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NS_ENSURE_STATE(selection);
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nsCOMPtr<nsIDOMNode> targetNode = aDestinationNode;
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int32_t targetOffset = aDestOffset;
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if (aDoDeleteSelection)
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{
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// Use an auto tracker so that our drop point is correctly
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// positioned after the delete.
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nsAutoTrackDOMPoint tracker(mRangeUpdater, &targetNode, &targetOffset);
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res = DeleteSelection(eNone, eStrip);
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NS_ENSURE_SUCCESS(res, res);
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}
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res = selection->Collapse(targetNode, targetOffset);
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NS_ENSURE_SUCCESS(res, res);
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}
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return InsertText(aStringToInsert);
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}
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NS_IMETHODIMP nsPlaintextEditor::InsertTextFromTransferable(nsITransferable *aTransferable,
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nsIDOMNode *aDestinationNode,
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int32_t aDestOffset,
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bool aDoDeleteSelection)
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{
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nsresult rv = NS_OK;
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char* bestFlavor = nullptr;
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nsCOMPtr<nsISupports> genericDataObj;
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uint32_t len = 0;
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if (NS_SUCCEEDED(aTransferable->GetAnyTransferData(&bestFlavor, getter_AddRefs(genericDataObj), &len))
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&& bestFlavor && (0 == nsCRT::strcmp(bestFlavor, kUnicodeMime) ||
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0 == nsCRT::strcmp(bestFlavor, kMozTextInternal)))
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{
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nsAutoTxnsConserveSelection dontSpazMySelection(this);
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nsCOMPtr<nsISupportsString> textDataObj ( do_QueryInterface(genericDataObj) );
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if (textDataObj && len > 0)
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{
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nsAutoString stuffToPaste;
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textDataObj->GetData(stuffToPaste);
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NS_ASSERTION(stuffToPaste.Length() <= (len/2), "Invalid length!");
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// Sanitize possible carriage returns in the string to be inserted
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nsContentUtils::PlatformToDOMLineBreaks(stuffToPaste);
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nsAutoEditBatch beginBatching(this);
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rv = InsertTextAt(stuffToPaste, aDestinationNode, aDestOffset, aDoDeleteSelection);
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}
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}
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free(bestFlavor);
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// Try to scroll the selection into view if the paste/drop succeeded
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if (NS_SUCCEEDED(rv))
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ScrollSelectionIntoView(false);
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return rv;
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}
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nsresult nsPlaintextEditor::InsertFromDataTransfer(DataTransfer *aDataTransfer,
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int32_t aIndex,
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nsIDOMDocument *aSourceDoc,
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nsIDOMNode *aDestinationNode,
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int32_t aDestOffset,
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bool aDoDeleteSelection)
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{
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nsCOMPtr<nsIVariant> data;
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DataTransfer::Cast(aDataTransfer)->GetDataAtNoSecurityCheck(NS_LITERAL_STRING("text/plain"), aIndex,
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getter_AddRefs(data));
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if (data) {
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nsAutoString insertText;
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data->GetAsAString(insertText);
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nsContentUtils::PlatformToDOMLineBreaks(insertText);
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nsAutoEditBatch beginBatching(this);
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return InsertTextAt(insertText, aDestinationNode, aDestOffset, aDoDeleteSelection);
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}
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return NS_OK;
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}
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nsresult nsPlaintextEditor::InsertFromDrop(nsIDOMEvent* aDropEvent)
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{
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ForceCompositionEnd();
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nsCOMPtr<nsIDOMDragEvent> dragEvent(do_QueryInterface(aDropEvent));
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NS_ENSURE_TRUE(dragEvent, NS_ERROR_FAILURE);
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nsCOMPtr<nsIDOMDataTransfer> domDataTransfer;
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dragEvent->GetDataTransfer(getter_AddRefs(domDataTransfer));
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nsCOMPtr<DataTransfer> dataTransfer = do_QueryInterface(domDataTransfer);
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NS_ENSURE_TRUE(dataTransfer, NS_ERROR_FAILURE);
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nsCOMPtr<nsIDragSession> dragSession = nsContentUtils::GetDragSession();
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NS_ASSERTION(dragSession, "No drag session");
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nsCOMPtr<nsIDOMNode> sourceNode;
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dataTransfer->GetMozSourceNode(getter_AddRefs(sourceNode));
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nsCOMPtr<nsIDOMDocument> srcdomdoc;
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if (sourceNode) {
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sourceNode->GetOwnerDocument(getter_AddRefs(srcdomdoc));
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NS_ENSURE_TRUE(sourceNode, NS_ERROR_FAILURE);
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}
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if (nsContentUtils::CheckForSubFrameDrop(dragSession,
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aDropEvent->GetInternalNSEvent()->AsDragEvent())) {
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// Don't allow drags from subframe documents with different origins than
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// the drop destination.
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if (srcdomdoc && !IsSafeToInsertData(srcdomdoc))
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return NS_OK;
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}
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// Current doc is destination
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nsCOMPtr<nsIDOMDocument> destdomdoc = GetDOMDocument();
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NS_ENSURE_TRUE(destdomdoc, NS_ERROR_NOT_INITIALIZED);
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uint32_t numItems = 0;
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nsresult rv = dataTransfer->GetMozItemCount(&numItems);
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NS_ENSURE_SUCCESS(rv, rv);
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if (numItems < 1) return NS_ERROR_FAILURE; // nothing to drop?
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// Combine any deletion and drop insertion into one transaction
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nsAutoEditBatch beginBatching(this);
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bool deleteSelection = false;
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// We have to figure out whether to delete and relocate caret only once
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// Parent and offset are under the mouse cursor
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nsCOMPtr<nsIDOMUIEvent> uiEvent = do_QueryInterface(aDropEvent);
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NS_ENSURE_TRUE(uiEvent, NS_ERROR_FAILURE);
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nsCOMPtr<nsIDOMNode> newSelectionParent;
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rv = uiEvent->GetRangeParent(getter_AddRefs(newSelectionParent));
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NS_ENSURE_SUCCESS(rv, rv);
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NS_ENSURE_TRUE(newSelectionParent, NS_ERROR_FAILURE);
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int32_t newSelectionOffset;
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rv = uiEvent->GetRangeOffset(&newSelectionOffset);
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NS_ENSURE_SUCCESS(rv, rv);
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RefPtr<Selection> selection = GetSelection();
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NS_ENSURE_TRUE(selection, NS_ERROR_FAILURE);
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bool isCollapsed = selection->Collapsed();
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// Only the nsHTMLEditor::FindUserSelectAllNode returns a node.
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nsCOMPtr<nsIDOMNode> userSelectNode = FindUserSelectAllNode(newSelectionParent);
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if (userSelectNode)
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{
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// The drop is happening over a "-moz-user-select: all"
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// subtree so make sure the content we insert goes before
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// the root of the subtree.
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//
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// XXX: Note that inserting before the subtree matches the
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// current behavior when dropping on top of an image.
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// The decision for dropping before or after the
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// subtree should really be done based on coordinates.
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newSelectionParent = GetNodeLocation(userSelectNode, &newSelectionOffset);
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NS_ENSURE_TRUE(newSelectionParent, NS_ERROR_FAILURE);
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}
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// Check if mouse is in the selection
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// if so, jump through some hoops to determine if mouse is over selection (bail)
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// and whether user wants to copy selection or delete it
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if (!isCollapsed)
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{
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// We never have to delete if selection is already collapsed
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bool cursorIsInSelection = false;
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int32_t rangeCount;
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rv = selection->GetRangeCount(&rangeCount);
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NS_ENSURE_SUCCESS(rv, rv);
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for (int32_t j = 0; j < rangeCount; j++)
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{
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RefPtr<nsRange> range = selection->GetRangeAt(j);
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if (!range) {
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// don't bail yet, iterate through them all
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continue;
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}
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rv = range->IsPointInRange(newSelectionParent, newSelectionOffset, &cursorIsInSelection);
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if (cursorIsInSelection)
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break;
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}
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if (cursorIsInSelection)
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{
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// Dragging within same doc can't drop on itself -- leave!
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if (srcdomdoc == destdomdoc)
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return NS_OK;
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// Dragging from another window onto a selection
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// XXX Decision made to NOT do this,
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// note that 4.x does replace if dropped on
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//deleteSelection = true;
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}
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else
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{
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// We are NOT over the selection
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if (srcdomdoc == destdomdoc)
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{
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// Within the same doc: delete if user doesn't want to copy
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uint32_t dropEffect;
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dataTransfer->GetDropEffectInt(&dropEffect);
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deleteSelection = !(dropEffect & nsIDragService::DRAGDROP_ACTION_COPY);
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}
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else
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{
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// Different source doc: Don't delete
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deleteSelection = false;
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}
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}
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}
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if (IsPlaintextEditor()) {
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nsCOMPtr<nsIContent> content = do_QueryInterface(newSelectionParent);
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while (content) {
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nsCOMPtr<nsIFormControl> formControl(do_QueryInterface(content));
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if (formControl && !formControl->AllowDrop()) {
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// Don't allow dropping into a form control that doesn't allow being
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// dropped into.
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return NS_OK;
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}
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content = content->GetParent();
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}
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}
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for (uint32_t i = 0; i < numItems; ++i) {
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InsertFromDataTransfer(dataTransfer, i, srcdomdoc, newSelectionParent,
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newSelectionOffset, deleteSelection);
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}
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if (NS_SUCCEEDED(rv))
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ScrollSelectionIntoView(false);
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return rv;
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}
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NS_IMETHODIMP nsPlaintextEditor::Paste(int32_t aSelectionType)
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{
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if (!FireClipboardEvent(ePaste, aSelectionType)) {
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return NS_OK;
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}
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// Get Clipboard Service
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nsresult rv;
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nsCOMPtr<nsIClipboard> clipboard(do_GetService("@mozilla.org/widget/clipboard;1", &rv));
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if ( NS_FAILED(rv) )
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return rv;
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// Get the nsITransferable interface for getting the data from the clipboard
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nsCOMPtr<nsITransferable> trans;
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rv = PrepareTransferable(getter_AddRefs(trans));
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if (NS_SUCCEEDED(rv) && trans)
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{
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// Get the Data from the clipboard
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if (NS_SUCCEEDED(clipboard->GetData(trans, aSelectionType)) && IsModifiable())
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{
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// handle transferable hooks
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nsCOMPtr<nsIDOMDocument> domdoc = GetDOMDocument();
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if (!nsEditorHookUtils::DoInsertionHook(domdoc, nullptr, trans))
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return NS_OK;
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rv = InsertTextFromTransferable(trans, nullptr, 0, true);
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}
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}
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return rv;
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}
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NS_IMETHODIMP nsPlaintextEditor::PasteTransferable(nsITransferable *aTransferable)
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{
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// Use an invalid value for the clipboard type as data comes from aTransferable
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// and we don't currently implement a way to put that in the data transfer yet.
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if (!FireClipboardEvent(ePaste, -1)) {
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return NS_OK;
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}
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if (!IsModifiable())
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return NS_OK;
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// handle transferable hooks
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nsCOMPtr<nsIDOMDocument> domdoc = GetDOMDocument();
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if (!nsEditorHookUtils::DoInsertionHook(domdoc, nullptr, aTransferable))
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return NS_OK;
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return InsertTextFromTransferable(aTransferable, nullptr, 0, true);
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}
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NS_IMETHODIMP nsPlaintextEditor::CanPaste(int32_t aSelectionType, bool *aCanPaste)
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{
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NS_ENSURE_ARG_POINTER(aCanPaste);
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*aCanPaste = false;
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// can't paste if readonly
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if (!IsModifiable())
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return NS_OK;
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nsresult rv;
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nsCOMPtr<nsIClipboard> clipboard(do_GetService("@mozilla.org/widget/clipboard;1", &rv));
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NS_ENSURE_SUCCESS(rv, rv);
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// the flavors that we can deal with
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const char* textEditorFlavors[] = { kUnicodeMime };
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bool haveFlavors;
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rv = clipboard->HasDataMatchingFlavors(textEditorFlavors,
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ArrayLength(textEditorFlavors),
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aSelectionType, &haveFlavors);
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NS_ENSURE_SUCCESS(rv, rv);
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*aCanPaste = haveFlavors;
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return NS_OK;
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}
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NS_IMETHODIMP nsPlaintextEditor::CanPasteTransferable(nsITransferable *aTransferable, bool *aCanPaste)
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{
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NS_ENSURE_ARG_POINTER(aCanPaste);
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// can't paste if readonly
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if (!IsModifiable()) {
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*aCanPaste = false;
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return NS_OK;
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}
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// If |aTransferable| is null, assume that a paste will succeed.
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if (!aTransferable) {
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*aCanPaste = true;
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return NS_OK;
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}
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nsCOMPtr<nsISupports> data;
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uint32_t dataLen;
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nsresult rv = aTransferable->GetTransferData(kUnicodeMime,
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getter_AddRefs(data),
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&dataLen);
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if (NS_SUCCEEDED(rv) && data)
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*aCanPaste = true;
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else
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*aCanPaste = false;
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return NS_OK;
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}
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bool nsPlaintextEditor::IsSafeToInsertData(nsIDOMDocument* aSourceDoc)
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{
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// Try to determine whether we should use a sanitizing fragment sink
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bool isSafe = false;
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nsCOMPtr<nsIDocument> destdoc = GetDocument();
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NS_ASSERTION(destdoc, "Where is our destination doc?");
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nsCOMPtr<nsIDocShellTreeItem> dsti = destdoc->GetDocShell();
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nsCOMPtr<nsIDocShellTreeItem> root;
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if (dsti)
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dsti->GetRootTreeItem(getter_AddRefs(root));
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nsCOMPtr<nsIDocShell> docShell = do_QueryInterface(root);
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uint32_t appType;
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if (docShell && NS_SUCCEEDED(docShell->GetAppType(&appType)))
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isSafe = appType == nsIDocShell::APP_TYPE_EDITOR;
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if (!isSafe && aSourceDoc) {
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nsCOMPtr<nsIDocument> srcdoc = do_QueryInterface(aSourceDoc);
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NS_ASSERTION(srcdoc, "Where is our source doc?");
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nsIPrincipal* srcPrincipal = srcdoc->NodePrincipal();
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nsIPrincipal* destPrincipal = destdoc->NodePrincipal();
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NS_ASSERTION(srcPrincipal && destPrincipal, "How come we don't have a principal?");
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srcPrincipal->Subsumes(destPrincipal, &isSafe);
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}
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return isSafe;
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}
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