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nsClipboard.mm
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nsClipboard.mm
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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Mozilla Corporation.
* Portions created by the Initial Developer are Copyright (C) 2006
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Josh Aas <josh@mozilla.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#ifdef MOZ_LOGGING
#define FORCE_PR_LOG
#endif
#include "prlog.h"
#include "nsCOMPtr.h"
#include "nsClipboard.h"
#include "nsString.h"
#include "nsISupportsPrimitives.h"
#include "nsXPIDLString.h"
#include "nsPrimitiveHelpers.h"
#include "nsMemory.h"
#include "nsILocalFile.h"
#include "nsStringStream.h"
#include "nsDragService.h"
#include "nsEscape.h"
#include "nsPrintfCString.h"
#include "nsObjCExceptions.h"
#include "imgIContainer.h"
#include "nsCocoaUtils.h"
// Screenshots use the (undocumented) png pasteboard type.
#define IMAGE_PASTEBOARD_TYPES NSTIFFPboardType, @"Apple PNG pasteboard type", nil
#ifdef PR_LOGGING
extern PRLogModuleInfo* sCocoaLog;
#endif
extern void EnsureLogInitialized();
nsClipboard::nsClipboard() : nsBaseClipboard()
{
mChangeCount = 0;
EnsureLogInitialized();
}
nsClipboard::~nsClipboard()
{
}
// We separate this into its own function because after an @try, all local
// variables within that function get marked as volatile, and our C++ type
// system doesn't like volatile things.
static NSData*
GetDataFromPasteboard(NSPasteboard* aPasteboard, NSString* aType)
{
NSData *data = nil;
@try {
data = [aPasteboard dataForType:aType];
} @catch (NSException* e) {
NS_WARNING(nsPrintfCString(256, "Exception raised while getting data from the pasteboard: \"%s - %s\"",
[[e name] UTF8String], [[e reason] UTF8String]).get());
}
return data;
}
NS_IMETHODIMP
nsClipboard::SetNativeClipboardData(PRInt32 aWhichClipboard)
{
NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSRESULT;
if ((aWhichClipboard != kGlobalClipboard) || !mTransferable)
return NS_ERROR_FAILURE;
mIgnoreEmptyNotification = true;
NSDictionary* pasteboardOutputDict = PasteboardDictFromTransferable(mTransferable);
if (!pasteboardOutputDict)
return NS_ERROR_FAILURE;
// write everything out to the general pasteboard
unsigned int outputCount = [pasteboardOutputDict count];
NSArray* outputKeys = [pasteboardOutputDict allKeys];
NSPasteboard* generalPBoard = [NSPasteboard generalPasteboard];
[generalPBoard declareTypes:outputKeys owner:nil];
for (unsigned int i = 0; i < outputCount; i++) {
NSString* currentKey = [outputKeys objectAtIndex:i];
id currentValue = [pasteboardOutputDict valueForKey:currentKey];
if (currentKey == NSStringPboardType ||
currentKey == kCorePboardType_url ||
currentKey == kCorePboardType_urld ||
currentKey == kCorePboardType_urln) {
[generalPBoard setString:currentValue forType:currentKey];
} else if (currentKey == NSHTMLPboardType) {
[generalPBoard setString:(nsClipboard::WrapHtmlForSystemPasteboard(currentValue))
forType:currentKey];
} else {
[generalPBoard setData:currentValue forType:currentKey];
}
}
mChangeCount = [generalPBoard changeCount];
mIgnoreEmptyNotification = false;
return NS_OK;
NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT;
}
nsresult
nsClipboard::TransferableFromPasteboard(nsITransferable *aTransferable, NSPasteboard *cocoaPasteboard)
{
NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSRESULT;
// get flavor list that includes all acceptable flavors (including ones obtained through conversion)
nsCOMPtr<nsISupportsArray> flavorList;
nsresult rv = aTransferable->FlavorsTransferableCanImport(getter_AddRefs(flavorList));
if (NS_FAILED(rv))
return NS_ERROR_FAILURE;
PRUint32 flavorCount;
flavorList->Count(&flavorCount);
for (PRUint32 i = 0; i < flavorCount; i++) {
nsCOMPtr<nsISupports> genericFlavor;
flavorList->GetElementAt(i, getter_AddRefs(genericFlavor));
nsCOMPtr<nsISupportsCString> currentFlavor(do_QueryInterface(genericFlavor));
if (!currentFlavor)
continue;
nsXPIDLCString flavorStr;
currentFlavor->ToString(getter_Copies(flavorStr)); // i has a flavr
// printf("looking for clipboard data of type %s\n", flavorStr.get());
NSString *pboardType = nil;
if (nsClipboard::IsStringType(flavorStr, &pboardType)) {
NSString* pString = [cocoaPasteboard stringForType:pboardType];
if (!pString)
continue;
NSData* stringData = [pString dataUsingEncoding:NSUnicodeStringEncoding];
unsigned int dataLength = [stringData length];
void* clipboardDataPtr = malloc(dataLength);
if (!clipboardDataPtr)
return NS_ERROR_OUT_OF_MEMORY;
[stringData getBytes:clipboardDataPtr];
// The DOM only wants LF, so convert from MacOS line endings to DOM line endings.
PRInt32 signedDataLength = dataLength;
nsLinebreakHelpers::ConvertPlatformToDOMLinebreaks(flavorStr, &clipboardDataPtr, &signedDataLength);
dataLength = signedDataLength;
// skip BOM (Byte Order Mark to distinguish little or big endian)
PRUnichar* clipboardDataPtrNoBOM = (PRUnichar*)clipboardDataPtr;
if ((dataLength > 2) &&
((clipboardDataPtrNoBOM[0] == 0xFEFF) ||
(clipboardDataPtrNoBOM[0] == 0xFFFE))) {
dataLength -= sizeof(PRUnichar);
clipboardDataPtrNoBOM += 1;
}
nsCOMPtr<nsISupports> genericDataWrapper;
nsPrimitiveHelpers::CreatePrimitiveForData(flavorStr, clipboardDataPtrNoBOM, dataLength,
getter_AddRefs(genericDataWrapper));
aTransferable->SetTransferData(flavorStr, genericDataWrapper, dataLength);
free(clipboardDataPtr);
break;
}
else if (flavorStr.EqualsLiteral(kJPEGImageMime) ||
flavorStr.EqualsLiteral(kPNGImageMime) ||
flavorStr.EqualsLiteral(kGIFImageMime)) {
// Figure out if there's data on the pasteboard we can grab (sanity check)
NSString *type = [cocoaPasteboard availableTypeFromArray:[NSArray arrayWithObjects:IMAGE_PASTEBOARD_TYPES]];
if (!type)
continue;
// Read data off the clipboard
NSData *pasteboardData = GetDataFromPasteboard(cocoaPasteboard, type);
if (!pasteboardData)
continue;
// Figure out what type we're converting to
CFStringRef outputType = NULL;
if (flavorStr.EqualsLiteral(kJPEGImageMime))
outputType = CFSTR("public.jpeg");
else if (flavorStr.EqualsLiteral(kPNGImageMime))
outputType = CFSTR("public.png");
else if (flavorStr.EqualsLiteral(kGIFImageMime))
outputType = CFSTR("com.compuserve.gif");
else
continue;
// Use ImageIO to interpret the data on the clipboard and transcode.
// Note that ImageIO, like all CF APIs, allows NULLs to propagate freely
// and safely in most cases (like ObjC). A notable exception is CFRelease.
NSDictionary *options = [NSDictionary dictionaryWithObjectsAndKeys:
(NSNumber*)kCFBooleanTrue, kCGImageSourceShouldAllowFloat,
(type == NSTIFFPboardType ? @"public.tiff" : @"public.png"),
kCGImageSourceTypeIdentifierHint, nil];
CGImageSourceRef source = CGImageSourceCreateWithData((CFDataRef)pasteboardData,
(CFDictionaryRef)options);
NSMutableData *encodedData = [NSMutableData data];
CGImageDestinationRef dest = CGImageDestinationCreateWithData((CFMutableDataRef)encodedData,
outputType,
1, NULL);
CGImageDestinationAddImageFromSource(dest, source, 0, NULL);
bool successfullyConverted = CGImageDestinationFinalize(dest);
if (successfullyConverted) {
// Put the converted data in a form Gecko can understand
nsCOMPtr<nsIInputStream> byteStream;
NS_NewByteInputStream(getter_AddRefs(byteStream), (const char*)[encodedData bytes],
[encodedData length], NS_ASSIGNMENT_COPY);
aTransferable->SetTransferData(flavorStr, byteStream, sizeof(nsIInputStream*));
}
if (dest)
CFRelease(dest);
if (source)
CFRelease(source);
if (successfullyConverted)
break;
else
continue;
}
}
return NS_OK;
NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT;
}
NS_IMETHODIMP
nsClipboard::GetNativeClipboardData(nsITransferable* aTransferable, PRInt32 aWhichClipboard)
{
NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSRESULT;
if ((aWhichClipboard != kGlobalClipboard) || !aTransferable)
return NS_ERROR_FAILURE;
NSPasteboard* cocoaPasteboard = [NSPasteboard generalPasteboard];
if (!cocoaPasteboard)
return NS_ERROR_FAILURE;
// get flavor list that includes all acceptable flavors (including ones obtained through conversion)
nsCOMPtr<nsISupportsArray> flavorList;
nsresult rv = aTransferable->FlavorsTransferableCanImport(getter_AddRefs(flavorList));
if (NS_FAILED(rv))
return NS_ERROR_FAILURE;
PRUint32 flavorCount;
flavorList->Count(&flavorCount);
// If we were the last ones to put something on the pasteboard, then just use the cached
// transferable. Otherwise clear it because it isn't relevant any more.
if (mChangeCount == [cocoaPasteboard changeCount]) {
if (mTransferable) {
for (PRUint32 i = 0; i < flavorCount; i++) {
nsCOMPtr<nsISupports> genericFlavor;
flavorList->GetElementAt(i, getter_AddRefs(genericFlavor));
nsCOMPtr<nsISupportsCString> currentFlavor(do_QueryInterface(genericFlavor));
if (!currentFlavor)
continue;
nsXPIDLCString flavorStr;
currentFlavor->ToString(getter_Copies(flavorStr));
nsCOMPtr<nsISupports> dataSupports;
PRUint32 dataSize = 0;
rv = mTransferable->GetTransferData(flavorStr, getter_AddRefs(dataSupports), &dataSize);
if (NS_SUCCEEDED(rv)) {
aTransferable->SetTransferData(flavorStr, dataSupports, dataSize);
return NS_OK; // maybe try to fill in more types? Is there a point?
}
}
}
}
else {
nsBaseClipboard::EmptyClipboard(kGlobalClipboard);
}
// at this point we can't satisfy the request from cache data so let's look
// for things other people put on the system clipboard
return nsClipboard::TransferableFromPasteboard(aTransferable, cocoaPasteboard);
NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT;
}
// returns true if we have *any* of the passed in flavors available for pasting
NS_IMETHODIMP
nsClipboard::HasDataMatchingFlavors(const char** aFlavorList, PRUint32 aLength,
PRInt32 aWhichClipboard, bool* outResult)
{
NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSRESULT;
*outResult = false;
if ((aWhichClipboard != kGlobalClipboard) || !aFlavorList)
return NS_OK;
// first see if we have data for this in our cached transferable
if (mTransferable) {
nsCOMPtr<nsISupportsArray> transferableFlavorList;
nsresult rv = mTransferable->FlavorsTransferableCanImport(getter_AddRefs(transferableFlavorList));
if (NS_SUCCEEDED(rv)) {
PRUint32 transferableFlavorCount;
transferableFlavorList->Count(&transferableFlavorCount);
for (PRUint32 j = 0; j < transferableFlavorCount; j++) {
nsCOMPtr<nsISupports> transferableFlavorSupports;
transferableFlavorList->GetElementAt(j, getter_AddRefs(transferableFlavorSupports));
nsCOMPtr<nsISupportsCString> currentTransferableFlavor(do_QueryInterface(transferableFlavorSupports));
if (!currentTransferableFlavor)
continue;
nsXPIDLCString transferableFlavorStr;
currentTransferableFlavor->ToString(getter_Copies(transferableFlavorStr));
for (PRUint32 k = 0; k < aLength; k++) {
if (transferableFlavorStr.Equals(aFlavorList[k])) {
*outResult = true;
return NS_OK;
}
}
}
}
}
NSPasteboard* generalPBoard = [NSPasteboard generalPasteboard];
for (PRUint32 i = 0; i < aLength; i++) {
nsDependentCString mimeType(aFlavorList[i]);
NSString *pboardType = nil;
if (nsClipboard::IsStringType(mimeType, &pboardType)) {
NSString* availableType = [generalPBoard availableTypeFromArray:[NSArray arrayWithObject:pboardType]];
if (availableType && [availableType isEqualToString:pboardType]) {
*outResult = true;
break;
}
} else if (!strcmp(aFlavorList[i], kJPEGImageMime) ||
!strcmp(aFlavorList[i], kPNGImageMime) ||
!strcmp(aFlavorList[i], kGIFImageMime)) {
NSString* availableType = [generalPBoard availableTypeFromArray:
[NSArray arrayWithObjects:IMAGE_PASTEBOARD_TYPES]];
if (availableType) {
*outResult = true;
break;
}
}
}
return NS_OK;
NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT;
}
// This function converts anything that other applications might understand into the system format
// and puts it into a dictionary which it returns.
// static
NSDictionary*
nsClipboard::PasteboardDictFromTransferable(nsITransferable* aTransferable)
{
NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NIL;
if (!aTransferable)
return nil;
NSMutableDictionary* pasteboardOutputDict = [NSMutableDictionary dictionary];
nsCOMPtr<nsISupportsArray> flavorList;
nsresult rv = aTransferable->FlavorsTransferableCanExport(getter_AddRefs(flavorList));
if (NS_FAILED(rv))
return nil;
PRUint32 flavorCount;
flavorList->Count(&flavorCount);
for (PRUint32 i = 0; i < flavorCount; i++) {
nsCOMPtr<nsISupports> genericFlavor;
flavorList->GetElementAt(i, getter_AddRefs(genericFlavor));
nsCOMPtr<nsISupportsCString> currentFlavor(do_QueryInterface(genericFlavor));
if (!currentFlavor)
continue;
nsXPIDLCString flavorStr;
currentFlavor->ToString(getter_Copies(flavorStr));
PR_LOG(sCocoaLog, PR_LOG_ALWAYS, ("writing out clipboard data of type %s (%d)\n", flavorStr.get(), i));
NSString *pboardType = nil;
if (nsClipboard::IsStringType(flavorStr, &pboardType)) {
void* data = nsnull;
PRUint32 dataSize = 0;
nsCOMPtr<nsISupports> genericDataWrapper;
rv = aTransferable->GetTransferData(flavorStr, getter_AddRefs(genericDataWrapper), &dataSize);
nsPrimitiveHelpers::CreateDataFromPrimitive(flavorStr, genericDataWrapper, &data, dataSize);
NSString* nativeString;
if (data)
nativeString = [NSString stringWithCharacters:(const unichar*)data length:(dataSize / sizeof(PRUnichar))];
else
nativeString = [NSString string];
// be nice to Carbon apps, normalize the receiver's contents using Form C.
nativeString = [nativeString precomposedStringWithCanonicalMapping];
[pasteboardOutputDict setObject:nativeString forKey:pboardType];
nsMemory::Free(data);
}
else if (flavorStr.EqualsLiteral(kPNGImageMime) || flavorStr.EqualsLiteral(kJPEGImageMime) ||
flavorStr.EqualsLiteral(kGIFImageMime) || flavorStr.EqualsLiteral(kNativeImageMime)) {
PRUint32 dataSize = 0;
nsCOMPtr<nsISupports> transferSupports;
aTransferable->GetTransferData(flavorStr, getter_AddRefs(transferSupports), &dataSize);
nsCOMPtr<nsISupportsInterfacePointer> ptrPrimitive(do_QueryInterface(transferSupports));
if (!ptrPrimitive)
continue;
nsCOMPtr<nsISupports> primitiveData;
ptrPrimitive->GetData(getter_AddRefs(primitiveData));
nsCOMPtr<imgIContainer> image(do_QueryInterface(primitiveData));
if (!image) {
NS_WARNING("Image isn't an imgIContainer in transferable");
continue;
}
nsRefPtr<gfxImageSurface> frame;
rv = image->CopyFrame( imgIContainer::FRAME_CURRENT,
imgIContainer::FLAG_SYNC_DECODE,
getter_AddRefs(frame));
if (NS_FAILED(rv) || !frame) {
continue;
}
CGImageRef imageRef = NULL;
nsresult rv = nsCocoaUtils::CreateCGImageFromSurface(frame, &imageRef);
if (NS_FAILED(rv) || !imageRef) {
continue;
}
// Convert the CGImageRef to TIFF data.
CFMutableDataRef tiffData = CFDataCreateMutable(kCFAllocatorDefault, 0);
CGImageDestinationRef destRef = CGImageDestinationCreateWithData(tiffData,
CFSTR("public.tiff"),
1,
NULL);
CGImageDestinationAddImage(destRef, imageRef, NULL);
bool successfullyConverted = CGImageDestinationFinalize(destRef);
CGImageRelease(imageRef);
if (destRef)
CFRelease(destRef);
if (!successfullyConverted) {
if (tiffData)
CFRelease(tiffData);
continue;
}
[pasteboardOutputDict setObject:(NSMutableData*)tiffData forKey:NSTIFFPboardType];
if (tiffData)
CFRelease(tiffData);
}
else if (flavorStr.EqualsLiteral(kFilePromiseMime)) {
[pasteboardOutputDict setObject:[NSArray arrayWithObject:@""] forKey:NSFilesPromisePboardType];
}
else if (flavorStr.EqualsLiteral(kURLMime)) {
PRUint32 len = 0;
nsCOMPtr<nsISupports> genericURL;
rv = aTransferable->GetTransferData(flavorStr, getter_AddRefs(genericURL), &len);
nsCOMPtr<nsISupportsString> urlObject(do_QueryInterface(genericURL));
nsAutoString url;
urlObject->GetData(url);
// A newline embedded in the URL means that the form is actually URL + title.
PRInt32 newlinePos = url.FindChar(PRUnichar('\n'));
if (newlinePos >= 0) {
url.Truncate(newlinePos);
nsAutoString urlTitle;
urlObject->GetData(urlTitle);
urlTitle.Mid(urlTitle, newlinePos + 1, len - (newlinePos + 1));
NSString *nativeTitle = [[NSString alloc] initWithCharacters:urlTitle.get() length:urlTitle.Length()];
// be nice to Carbon apps, normalize the receiver's contents using Form C.
[pasteboardOutputDict setObject:[nativeTitle precomposedStringWithCanonicalMapping] forKey:kCorePboardType_urln];
// Also put the title out as 'urld', since some recipients will look for that.
[pasteboardOutputDict setObject:[nativeTitle precomposedStringWithCanonicalMapping] forKey:kCorePboardType_urld];
[nativeTitle release];
}
// The Finder doesn't like getting random binary data aka
// Unicode, so change it into an escaped URL containing only
// ASCII.
nsCAutoString utf8Data = NS_ConvertUTF16toUTF8(url.get(), url.Length());
nsCAutoString escData;
NS_EscapeURL(utf8Data.get(), utf8Data.Length(), esc_OnlyNonASCII|esc_AlwaysCopy, escData);
// printf("Escaped url is %s, length %d\n", escData.get(), escData.Length());
NSString *nativeURL = [NSString stringWithUTF8String:escData.get()];
[pasteboardOutputDict setObject:nativeURL forKey:kCorePboardType_url];
}
// If it wasn't a type that we recognize as exportable we don't put it on the system
// clipboard. We'll just access it from our cached transferable when we need it.
}
return pasteboardOutputDict;
NS_OBJC_END_TRY_ABORT_BLOCK_NIL;
}
bool nsClipboard::IsStringType(const nsCString& aMIMEType, NSString** aPasteboardType)
{
if (aMIMEType.EqualsLiteral(kUnicodeMime) ||
aMIMEType.EqualsLiteral(kHTMLMime)) {
if (aMIMEType.EqualsLiteral(kUnicodeMime))
*aPasteboardType = NSStringPboardType;
else
*aPasteboardType = NSHTMLPboardType;
return true;
} else {
return false;
}
}
NSString* nsClipboard::WrapHtmlForSystemPasteboard(NSString* aString)
{
NSString* wrapped =
[NSString stringWithFormat:
@"<html>"
"<head>"
"<meta http-equiv=\"content-type\" content=\"text/html; charset=utf-8\">"
"</head>"
"<body>"
"%@"
"</body>"
"</html>", aString];
return wrapped;
}