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/*
* Copyright (C) 2006, 2007, 2008 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "core/clipboard/DataTransfer.h"
#include "core/HTMLNames.h"
#include "core/clipboard/DataObject.h"
#include "core/clipboard/DataTransferItem.h"
#include "core/clipboard/DataTransferItemList.h"
#include "core/editing/markup.h"
#include "core/fetch/ImageResource.h"
#include "core/fileapi/FileList.h"
#include "core/frame/LocalFrame.h"
#include "core/html/HTMLImageElement.h"
#include "core/rendering/RenderImage.h"
#include "core/rendering/RenderLayer.h"
#include "core/rendering/RenderObject.h"
#include "platform/DragImage.h"
#include "platform/MIMETypeRegistry.h"
#include "platform/clipboard/ClipboardMimeTypes.h"
#include "platform/clipboard/ClipboardUtilities.h"
namespace blink {
static DragOperation convertEffectAllowedToDragOperation(const String& op)
{
// Values specified in http://www.whatwg.org/specs/web-apps/current-work/multipage/dnd.html#dom-datatransfer-effectallowed
if (op == "uninitialized")
return DragOperationEvery;
if (op == "none")
return DragOperationNone;
if (op == "copy")
return DragOperationCopy;
if (op == "link")
return DragOperationLink;
if (op == "move")
return (DragOperation)(DragOperationGeneric | DragOperationMove);
if (op == "copyLink")
return (DragOperation)(DragOperationCopy | DragOperationLink);
if (op == "copyMove")
return (DragOperation)(DragOperationCopy | DragOperationGeneric | DragOperationMove);
if (op == "linkMove")
return (DragOperation)(DragOperationLink | DragOperationGeneric | DragOperationMove);
if (op == "all")
return DragOperationEvery;
return DragOperationPrivate; // really a marker for "no conversion"
}
static String convertDragOperationToEffectAllowed(DragOperation op)
{
bool moveSet = !!((DragOperationGeneric | DragOperationMove) & op);
if ((moveSet && (op & DragOperationCopy) && (op & DragOperationLink))
|| (op == DragOperationEvery))
return "all";
if (moveSet && (op & DragOperationCopy))
return "copyMove";
if (moveSet && (op & DragOperationLink))
return "linkMove";
if ((op & DragOperationCopy) && (op & DragOperationLink))
return "copyLink";
if (moveSet)
return "move";
if (op & DragOperationCopy)
return "copy";
if (op & DragOperationLink)
return "link";
return "none";
}
// We provide the IE clipboard types (URL and Text), and the clipboard types specified in the WHATWG Web Applications 1.0 draft
// see http://www.whatwg.org/specs/web-apps/current-work/ Section 6.3.5.3
static String normalizeType(const String& type, bool* convertToURL = 0)
{
String cleanType = type.stripWhiteSpace().lower();
if (cleanType == mimeTypeText || cleanType.startsWith(mimeTypeTextPlainEtc))
return mimeTypeTextPlain;
if (cleanType == mimeTypeURL) {
if (convertToURL)
*convertToURL = true;
return mimeTypeTextURIList;
}
return cleanType;
}
PassRefPtrWillBeRawPtr<DataTransfer> DataTransfer::create(DataTransferType type, DataTransferAccessPolicy policy, PassRefPtrWillBeRawPtr<DataObject> dataObject)
{
return adoptRefWillBeNoop(new DataTransfer(type, policy, dataObject));
}
DataTransfer::~DataTransfer()
{
}
void DataTransfer::setDropEffect(const String &effect)
{
if (!isForDragAndDrop())
return;
// The attribute must ignore any attempts to set it to a value other than none, copy, link, and move.
if (effect != "none" && effect != "copy" && effect != "link" && effect != "move")
return;
// FIXME: The spec actually allows this in all circumstances, even though there's no point in
// setting the drop effect when this condition is not true.
if (canReadTypes())
m_dropEffect = effect;
}
void DataTransfer::setEffectAllowed(const String &effect)
{
if (!isForDragAndDrop())
return;
if (convertEffectAllowedToDragOperation(effect) == DragOperationPrivate) {
// This means that there was no conversion, and the effectAllowed that
// we are passed isn't a valid effectAllowed, so we should ignore it,
// and not set m_effectAllowed.
// The attribute must ignore any attempts to set it to a value other than
// none, copy, copyLink, copyMove, link, linkMove, move, all, and uninitialized.
return;
}
if (canWriteData())
m_effectAllowed = effect;
}
void DataTransfer::clearData(const String& type)
{
if (!canWriteData())
return;
if (type.isNull())
m_dataObject->clearAll();
else
m_dataObject->clearData(normalizeType(type));
}
String DataTransfer::getData(const String& type) const
{
if (!canReadData())
return String();
bool convertToURL = false;
String data = m_dataObject->getData(normalizeType(type, &convertToURL));
if (!convertToURL)
return data;
return convertURIListToURL(data);
}
void DataTransfer::setData(const String& type, const String& data)
{
if (!canWriteData())
return;
m_dataObject->setData(normalizeType(type), data);
}
// extensions beyond IE's API
Vector<String> DataTransfer::types() const
{
Vector<String> types;
if (!canReadTypes())
return types;
ListHashSet<String> typesSet = m_dataObject->types();
types.appendRange(typesSet.begin(), typesSet.end());
return types;
}
FileList* DataTransfer::files() const
{
FileList* files = FileList::create();
if (!canReadData())
return files;
for (size_t i = 0; i < m_dataObject->length(); ++i) {
if (m_dataObject->item(i)->kind() == DataObjectItem::FileKind) {
Blob* blob = m_dataObject->item(i)->getAsFile();
if (blob && blob->isFile())
files->append(toFile(blob));
}
}
return files;
}
void DataTransfer::setDragImage(Element* image, int x, int y, ExceptionState& exceptionState)
{
if (!isForDragAndDrop())
return;
if (!image) {
exceptionState.throwTypeError("setDragImage: Invalid first argument");
return;
}
IntPoint location(x, y);
if (isHTMLImageElement(*image) && !image->inDocument())
setDragImageResource(toHTMLImageElement(*image).cachedImage(), location);
else
setDragImageElement(image, location);
}
void DataTransfer::clearDragImage()
{
if (!canSetDragImage())
return;
m_dragImage = 0;
m_dragLoc = IntPoint();
m_dragImageElement = nullptr;
}
void DataTransfer::setDragImageResource(ImageResource* img, const IntPoint& loc)
{
setDragImage(img, 0, loc);
}
void DataTransfer::setDragImageElement(Node* node, const IntPoint& loc)
{
setDragImage(0, node, loc);
}
PassOwnPtr<DragImage> DataTransfer::createDragImage(IntPoint& loc, LocalFrame* frame) const
{
if (m_dragImageElement) {
loc = m_dragLoc;
return frame->nodeImage(*m_dragImageElement);
}
if (m_dragImage) {
loc = m_dragLoc;
return DragImage::create(m_dragImage->image());
}
return nullptr;
}
static ImageResource* getImageResource(Element* element)
{
// Attempt to pull ImageResource from element
ASSERT(element);
RenderObject* renderer = element->renderer();
if (!renderer || !renderer->isImage())
return 0;
RenderImage* image = toRenderImage(renderer);
if (image->cachedImage() && !image->cachedImage()->errorOccurred())
return image->cachedImage();
return 0;
}
static void writeImageToDataObject(DataObject* dataObject, Element* element, const KURL& url)
{
// Shove image data into a DataObject for use as a file
ImageResource* cachedImage = getImageResource(element);
if (!cachedImage || !cachedImage->imageForRenderer(element->renderer()) || !cachedImage->isLoaded())
return;
SharedBuffer* imageBuffer = cachedImage->imageForRenderer(element->renderer())->data();
if (!imageBuffer || !imageBuffer->size())
return;
String imageExtension = cachedImage->image()->filenameExtension();
ASSERT(!imageExtension.isEmpty());
// Determine the filename for the file contents of the image.
String filename = cachedImage->response().suggestedFilename();
if (filename.isEmpty())
filename = url.lastPathComponent();
String fileExtension;
if (filename.isEmpty()) {
filename = element->getAttribute(HTMLNames::altAttr);
} else {
// Strip any existing extension. Assume that alt text is usually not a filename.
int extensionIndex = filename.reverseFind('.');
if (extensionIndex != -1) {
fileExtension = filename.substring(extensionIndex + 1);
filename.truncate(extensionIndex);
}
}
if (!fileExtension.isEmpty() && fileExtension != imageExtension) {
String imageMimeType = MIMETypeRegistry::getMIMETypeForExtension(imageExtension);
ASSERT(imageMimeType.startsWith("image/"));
// Use the file extension only if it has imageMimeType: it's untrustworthy otherwise.
if (imageMimeType == MIMETypeRegistry::getMIMETypeForExtension(fileExtension))
imageExtension = fileExtension;
}
imageExtension = "." + imageExtension;
validateFilename(filename, imageExtension);
dataObject->addSharedBuffer(filename + imageExtension, imageBuffer);
}
void DataTransfer::declareAndWriteDragImage(Element* element, const KURL& url, const String& title)
{
if (!m_dataObject)
return;
m_dataObject->setURLAndTitle(url, title);
// Write the bytes in the image to the file format.
writeImageToDataObject(m_dataObject.get(), element, url);
// Put img tag on the clipboard referencing the image
m_dataObject->setData(mimeTypeTextHTML, createMarkup(element, IncludeNode, ResolveAllURLs));
}
void DataTransfer::writeURL(const KURL& url, const String& title)
{
if (!m_dataObject)
return;
ASSERT(!url.isEmpty());
m_dataObject->setURLAndTitle(url, title);
// The URL can also be used as plain text.
m_dataObject->setData(mimeTypeTextPlain, url.string());
// The URL can also be used as an HTML fragment.
m_dataObject->setHTMLAndBaseURL(urlToMarkup(url, title), url);
}
void DataTransfer::writeRange(Range* selectedRange, LocalFrame* frame)
{
ASSERT(selectedRange);
if (!m_dataObject)
return;
m_dataObject->setHTMLAndBaseURL(createMarkup(selectedRange, AnnotateForInterchange, false, ResolveNonLocalURLs), frame->document()->url());
String str = frame->selectedTextForClipboard();
#if OS(WIN)
replaceNewlinesWithWindowsStyleNewlines(str);
#endif
replaceNBSPWithSpace(str);
m_dataObject->setData(mimeTypeTextPlain, str);
}
void DataTransfer::writePlainText(const String& text)
{
if (!m_dataObject)
return;
String str = text;
#if OS(WIN)
replaceNewlinesWithWindowsStyleNewlines(str);
#endif
replaceNBSPWithSpace(str);
m_dataObject->setData(mimeTypeTextPlain, str);
}
bool DataTransfer::hasData()
{
ASSERT(isForDragAndDrop());
return m_dataObject->length() > 0;
}
void DataTransfer::setAccessPolicy(DataTransferAccessPolicy policy)
{
// once you go numb, can never go back
ASSERT(m_policy != DataTransferNumb || policy == DataTransferNumb);
m_policy = policy;
}
bool DataTransfer::canReadTypes() const
{
return m_policy == DataTransferReadable || m_policy == DataTransferTypesReadable || m_policy == DataTransferWritable;
}
bool DataTransfer::canReadData() const
{
return m_policy == DataTransferReadable || m_policy == DataTransferWritable;
}
bool DataTransfer::canWriteData() const
{
return m_policy == DataTransferWritable;
}
bool DataTransfer::canSetDragImage() const
{
return m_policy == DataTransferImageWritable || m_policy == DataTransferWritable;
}
DragOperation DataTransfer::sourceOperation() const
{
DragOperation op = convertEffectAllowedToDragOperation(m_effectAllowed);
ASSERT(op != DragOperationPrivate);
return op;
}
DragOperation DataTransfer::destinationOperation() const
{
DragOperation op = convertEffectAllowedToDragOperation(m_dropEffect);
ASSERT(op == DragOperationCopy || op == DragOperationNone || op == DragOperationLink || op == (DragOperation)(DragOperationGeneric | DragOperationMove) || op == DragOperationEvery);
return op;
}
void DataTransfer::setSourceOperation(DragOperation op)
{
ASSERT_ARG(op, op != DragOperationPrivate);
m_effectAllowed = convertDragOperationToEffectAllowed(op);
}
void DataTransfer::setDestinationOperation(DragOperation op)
{
ASSERT_ARG(op, op == DragOperationCopy || op == DragOperationNone || op == DragOperationLink || op == DragOperationGeneric || op == DragOperationMove || op == (DragOperation)(DragOperationGeneric | DragOperationMove));
m_dropEffect = convertDragOperationToEffectAllowed(op);
}
bool DataTransfer::hasDropZoneType(const String& keyword)
{
if (keyword.startsWith("file:"))
return hasFileOfType(keyword.substring(5));
if (keyword.startsWith("string:"))
return hasStringOfType(keyword.substring(7));
return false;
}
PassRefPtrWillBeRawPtr<DataTransferItemList> DataTransfer::items()
{
// FIXME: According to the spec, we are supposed to return the same collection of items each
// time. We now return a wrapper that always wraps the *same* set of items, so JS shouldn't be
// able to tell, but we probably still want to fix this.
return DataTransferItemList::create(this, m_dataObject);
}
PassRefPtrWillBeRawPtr<DataObject> DataTransfer::dataObject() const
{
return m_dataObject;
}
DataTransfer::DataTransfer(DataTransferType type, DataTransferAccessPolicy policy, PassRefPtrWillBeRawPtr<DataObject> dataObject)
: m_policy(policy)
, m_dropEffect("uninitialized")
, m_effectAllowed("uninitialized")
, m_transferType(type)
, m_dataObject(dataObject)
{
}
void DataTransfer::setDragImage(ImageResource* image, Node* node, const IntPoint& loc)
{
if (!canSetDragImage())
return;
m_dragImage = image;
m_dragLoc = loc;
m_dragImageElement = node;
}
bool DataTransfer::hasFileOfType(const String& type) const
{
if (!canReadTypes())
return false;
FileList* fileList = files();
if (fileList->isEmpty())
return false;
for (unsigned f = 0; f < fileList->length(); f++) {
if (equalIgnoringCase(fileList->item(f)->type(), type))
return true;
}
return false;
}
bool DataTransfer::hasStringOfType(const String& type) const
{
if (!canReadTypes())
return false;
return types().contains(type);
}
DragOperation convertDropZoneOperationToDragOperation(const String& dragOperation)
{
if (dragOperation == "copy")
return DragOperationCopy;
if (dragOperation == "move")
return DragOperationMove;
if (dragOperation == "link")
return DragOperationLink;
return DragOperationNone;
}
String convertDragOperationToDropZoneOperation(DragOperation operation)
{
switch (operation) {
case DragOperationCopy:
return String("copy");
case DragOperationMove:
return String("move");
case DragOperationLink:
return String("link");
default:
return String("copy");
}
}
void DataTransfer::trace(Visitor* visitor)
{
visitor->trace(m_dataObject);
visitor->trace(m_dragImageElement);
}
} // namespace blink
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