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gecko-dev/widget/os2/nsDragService.cpp

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/* 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/. */
#define INCL_DOSMISC
#define INCL_DOSERRORS
#include "nsDragService.h"
#include "nsXPCOM.h"
#include "nsISupportsPrimitives.h"
#include "nsString.h"
#include "nsXPIDLString.h"
#include "nsReadableUtils.h"
#include "nsIWebBrowserPersist.h"
#include "nsIFile.h"
#include "nsIURI.h"
#include "nsIURL.h"
#include "nsNetUtil.h"
#include "nsOS2Uni.h"
#include "wdgtos2rc.h"
#include "nsILocalFileOS2.h"
#include "nsIDocument.h"
#include "nsGUIEvent.h"
#include "nsISelection.h"
// --------------------------------------------------------------------------
// Local defines
// undocumented(?)
#ifndef DC_PREPAREITEM
#define DC_PREPAREITEM 0x0040
#endif
// limit URL object titles to a reasonable length
#define MAXTITLELTH 31
#define TITLESEPARATOR (L' ')
#define DTSHARE_NAME "\\SHAREMEM\\MOZ_DND"
#define DTSHARE_RMF "<DRM_DTSHARE, DRF_TEXT>"
#define OS2FILE_NAME "MOZ_TGT.TMP"
#define OS2FILE_TXTRMF "<DRM_OS2FILE, DRF_TEXT>"
#define OS2FILE_UNKRMF "<DRM_OS2FILE, DRF_UNKNOWN>"
// not defined in the OS/2 toolkit headers
extern "C" {
APIRET APIENTRY DosQueryModFromEIP(HMODULE *phMod, ULONG *pObjNum,
ULONG BuffLen, PCHAR pBuff,
ULONG *pOffset, ULONG Address);
}
// --------------------------------------------------------------------------
// Helper functions
nsresult RenderToOS2File( PDRAGITEM pditem, HWND hwnd);
nsresult RenderToOS2FileComplete(PDRAGTRANSFER pdxfer, USHORT usResult,
bool content, char** outText);
nsresult RenderToDTShare( PDRAGITEM pditem, HWND hwnd);
nsresult RenderToDTShareComplete(PDRAGTRANSFER pdxfer, USHORT usResult,
char** outText);
nsresult RequestRendering( PDRAGITEM pditem, HWND hwnd, PCSZ pRMF, PCSZ pName);
nsresult GetAtom( ATOM aAtom, char** outText);
nsresult GetFileName(PDRAGITEM pditem, char** outText);
nsresult GetFileContents(PCSZ pszPath, char** outText);
nsresult GetTempFileName(char** outText);
void SaveTypeAndSource(nsIFile *file, nsIDOMDocument *domDoc,
PCSZ pszType);
int UnicodeToCodepage( const nsAString& inString, char **outText);
int CodepageToUnicode( const nsACString& inString, PRUnichar **outText);
void RemoveCarriageReturns(char * pszText);
MRESULT EXPENTRY nsDragWindowProc(HWND hWnd, ULONG msg, MPARAM mp1, MPARAM mp2);
// --------------------------------------------------------------------------
// Global data
static HPOINTER gPtrArray[IDC_DNDCOUNT];
static char * gTempFile = 0;
// --------------------------------------------------------------------------
// --------------------------------------------------------------------------
nsDragService::nsDragService()
{
// member initializers and constructor code
mDragWnd = WinCreateWindow( HWND_DESKTOP, WC_STATIC, 0, 0, 0, 0, 0, 0,
HWND_DESKTOP, HWND_BOTTOM, 0, 0, 0);
WinSubclassWindow( mDragWnd, nsDragWindowProc);
HMODULE hModResources = NULLHANDLE;
DosQueryModFromEIP(&hModResources, NULL, 0, NULL, NULL, (ULONG) &gPtrArray);
for (int i = 0; i < IDC_DNDCOUNT; i++)
gPtrArray[i] = ::WinLoadPointer(HWND_DESKTOP, hModResources, i+IDC_DNDBASE);
}
// --------------------------------------------------------------------------
nsDragService::~nsDragService()
{
// destructor code
WinDestroyWindow(mDragWnd);
for (int i = 0; i < IDC_DNDCOUNT; i++) {
WinDestroyPointer(gPtrArray[i]);
gPtrArray[i] = 0;
}
}
NS_IMPL_ISUPPORTS_INHERITED1(nsDragService, nsBaseDragService, nsIDragSessionOS2)
// --------------------------------------------------------------------------
NS_IMETHODIMP nsDragService::InvokeDragSession(nsIDOMNode *aDOMNode,
nsISupportsArray *aTransferables,
nsIScriptableRegion *aRegion,
uint32_t aActionType)
{
if (mDoingDrag)
return NS_ERROR_UNEXPECTED;
nsresult rv = nsBaseDragService::InvokeDragSession(aDOMNode, aTransferables,
aRegion, aActionType);
NS_ENSURE_SUCCESS(rv, rv);
mSourceDataItems = aTransferables;
WinSetCapture(HWND_DESKTOP, NULLHANDLE);
// Assume we are only dragging one thing for now
PDRAGINFO pDragInfo = DrgAllocDraginfo(1);
if (!pDragInfo)
return NS_ERROR_UNEXPECTED;
pDragInfo->usOperation = DO_DEFAULT;
DRAGITEM dragitem;
dragitem.hwndItem = mDragWnd;
dragitem.ulItemID = (ULONG)this;
dragitem.fsControl = DC_OPEN;
dragitem.cxOffset = 2;
dragitem.cyOffset = 2;
dragitem.fsSupportedOps = DO_COPYABLE|DO_MOVEABLE|DO_LINKABLE;
// since there is no source file, leave these "blank"
dragitem.hstrContainerName = NULLHANDLE;
dragitem.hstrSourceName = NULLHANDLE;
rv = NS_ERROR_FAILURE;
ULONG idIcon = 0;
// bracket this to reduce our footprint before the drag begins
{
nsCOMPtr<nsISupports> genericItem;
mSourceDataItems->GetElementAt(0, getter_AddRefs(genericItem));
nsCOMPtr<nsITransferable> transItem (do_QueryInterface(genericItem));
nsCOMPtr<nsISupports> genericData;
uint32_t len = 0;
// see if we have a URL or text; if so, the title method
// will save the data and mimetype for use with a native drop
if (NS_SUCCEEDED(transItem->GetTransferData(kURLMime,
getter_AddRefs(genericData), &len))) {
nsXPIDLCString targetName;
rv = GetUrlAndTitle( genericData, getter_Copies(targetName));
if (NS_SUCCEEDED(rv)) {
// advise PM that we need a DM_RENDERPREPARE msg
// *before* it composes a render-to filename
dragitem.fsControl |= DC_PREPAREITEM;
dragitem.hstrType = DrgAddStrHandle("UniformResourceLocator");
dragitem.hstrRMF = DrgAddStrHandle("<DRM_OS2FILE,DRF_TEXT>");
dragitem.hstrTargetName = DrgAddStrHandle(targetName.get());
idIcon = IDC_DNDURL;
}
}
else
if (NS_SUCCEEDED(transItem->GetTransferData(kUnicodeMime,
getter_AddRefs(genericData), &len))) {
nsXPIDLCString targetName;
rv = GetUniTextTitle( genericData, getter_Copies(targetName));
if (NS_SUCCEEDED(rv)) {
dragitem.hstrType = DrgAddStrHandle("Plain Text");
dragitem.hstrRMF = DrgAddStrHandle("<DRM_OS2FILE,DRF_TEXT>");
dragitem.hstrTargetName = DrgAddStrHandle(targetName.get());
idIcon = IDC_DNDTEXT;
}
}
}
// if neither URL nor text are available, make this a Moz-only drag
// by making it unidentifiable to native apps
if (NS_FAILED(rv)) {
mMimeType = 0;
dragitem.hstrType = DrgAddStrHandle("Unknown");
dragitem.hstrRMF = DrgAddStrHandle("<DRM_UNKNOWN,DRF_UNKNOWN>");
dragitem.hstrTargetName = NULLHANDLE;
}
DrgSetDragitem(pDragInfo, &dragitem, sizeof(DRAGITEM), 0);
DRAGIMAGE dragimage;
memset(&dragimage, 0, sizeof(DRAGIMAGE));
dragimage.cb = sizeof(DRAGIMAGE);
dragimage.fl = DRG_ICON;
if (idIcon)
dragimage.hImage = gPtrArray[idIcon-IDC_DNDBASE];
if (dragimage.hImage) {
dragimage.cyOffset = 8;
dragimage.cxOffset = 2;
}
else
dragimage.hImage = WinQuerySysPointer(HWND_DESKTOP, SPTR_FILE, FALSE);
mDoingDrag = true;
LONG escState = WinGetKeyState(HWND_DESKTOP, VK_ESC) & 0x01;
HWND hwndDest = DrgDrag(mDragWnd, pDragInfo, &dragimage, 1, VK_BUTTON2,
(void*)0x80000000L); // Don't lock the desktop PS
// determine whether the drag ended because Escape was pressed
if (hwndDest == 0 && (WinGetKeyState(HWND_DESKTOP, VK_ESC) & 0x01) != escState)
mUserCancelled = true;
FireDragEventAtSource(NS_DRAGDROP_END);
mDoingDrag = false;
// do clean up; if the drop completed,
// the target will delete the string handles
if (hwndDest == 0)
DrgDeleteDraginfoStrHandles(pDragInfo);
DrgFreeDraginfo(pDragInfo);
// reset nsDragService's members
mSourceDataItems = 0;
mSourceData = 0;
mMimeType = 0;
// reset nsBaseDragService's members
mSourceDocument = nullptr;
mSourceNode = nullptr;
mSelection = nullptr;
mDataTransfer = nullptr;
mUserCancelled = false;
mHasImage = false;
mImage = nullptr;
mImageX = 0;
mImageY = 0;
mScreenX = -1;
mScreenY = -1;
return NS_OK;
}
// --------------------------------------------------------------------------
MRESULT EXPENTRY nsDragWindowProc(HWND hWnd, ULONG msg, MPARAM mp1, MPARAM mp2)
{
switch (msg) {
// if the user requests the contents of a URL be rendered (vs the URL
// itself), change the suggested target name from the URL's title to
// the name of the file that will be retrieved
case DM_RENDERPREPARE: {
PDRAGTRANSFER pdxfer = (PDRAGTRANSFER)mp1;
nsDragService* dragservice = (nsDragService*)pdxfer->pditem->ulItemID;
if (pdxfer->usOperation == DO_COPY &&
(WinGetKeyState(HWND_DESKTOP, VK_CTRL) & 0x8000) &&
!strcmp(dragservice->mMimeType, kURLMime)) {
// QI'ing nsIURL will fail for mailto: and the like
nsCOMPtr<nsIURL> urlObject(do_QueryInterface(dragservice->mSourceData));
if (urlObject) {
nsAutoCString filename;
urlObject->GetFileName(filename);
if (filename.IsEmpty()) {
urlObject->GetHost(filename);
filename.Append("/file");
}
DrgDeleteStrHandle(pdxfer->pditem->hstrTargetName);
pdxfer->pditem->hstrTargetName = DrgAddStrHandle(filename.get());
}
}
return (MRESULT)TRUE;
}
case DM_RENDER: {
nsresult rv = NS_ERROR_FAILURE;
PDRAGTRANSFER pdxfer = (PDRAGTRANSFER)mp1;
nsDragService* dragservice = (nsDragService*)pdxfer->pditem->ulItemID;
char chPath[CCHMAXPATH];
DrgQueryStrName(pdxfer->hstrRenderToName, CCHMAXPATH, chPath);
// if the user Ctrl-dropped a URL, use the nsIURL interface
// to determine if it points to content (i.e. a file); if so,
// fetch its contents; if not (e.g. a 'mailto:' url), drop into
// the code that uses nsIURI to render a URL object
if (!strcmp(dragservice->mMimeType, kURLMime)) {
if (pdxfer->usOperation == DO_COPY &&
(WinGetKeyState(HWND_DESKTOP, VK_CTRL) & 0x8000)) {
nsCOMPtr<nsIURL> urlObject(do_QueryInterface(dragservice->mSourceData));
if (urlObject)
rv = dragservice->SaveAsContents(chPath, urlObject);
}
if (!NS_SUCCEEDED(rv)) {
nsCOMPtr<nsIURI> uriObject(do_QueryInterface(dragservice->mSourceData));
if (uriObject)
rv = dragservice->SaveAsURL(chPath, uriObject);
}
}
else
// if we're dragging text, do NLS conversion then write it to file
if (!strcmp(dragservice->mMimeType, kUnicodeMime)) {
nsCOMPtr<nsISupportsString> strObject(
do_QueryInterface(dragservice->mSourceData));
if (strObject)
rv = dragservice->SaveAsText(chPath, strObject);
}
DrgPostTransferMsg(pdxfer->hwndClient, DM_RENDERCOMPLETE, pdxfer,
(NS_SUCCEEDED(rv) ? DMFL_RENDEROK : DMFL_RENDERFAIL),
0, TRUE);
DrgFreeDragtransfer(pdxfer);
return (MRESULT)TRUE;
}
// we don't use these msgs but neither does WinDefWindowProc()
case DM_DRAGOVERNOTIFY:
case DM_ENDCONVERSATION:
return 0;
default:
break;
}
return ::WinDefWindowProc(hWnd, msg, mp1, mp2);
}
//-------------------------------------------------------------------------
// if the versions of Start & EndDragSession in nsBaseDragService
// were called (and they shouldn't be), they'd break nsIDragSessionOS2;
// they're overridden here and turned into no-ops to prevent this
NS_IMETHODIMP nsDragService::StartDragSession()
{
NS_ERROR("OS/2 version of StartDragSession() should never be called!");
return NS_OK;
}
NS_IMETHODIMP nsDragService::EndDragSession(bool aDragDone)
{
NS_ERROR("OS/2 version of EndDragSession() should never be called!");
return NS_OK;
}
// --------------------------------------------------------------------------
NS_IMETHODIMP nsDragService::GetNumDropItems(uint32_t *aNumDropItems)
{
if (mSourceDataItems)
mSourceDataItems->Count(aNumDropItems);
else
*aNumDropItems = 0;
return NS_OK;
}
// --------------------------------------------------------------------------
NS_IMETHODIMP nsDragService::GetData(nsITransferable *aTransferable,
uint32_t aItemIndex)
{
// make sure that we have a transferable
if (!aTransferable)
return NS_ERROR_INVALID_ARG;
// get flavor list that includes all acceptable flavors (including
// ones obtained through conversion). Flavors are nsISupportsCStrings
// so that they can be seen from JS.
nsresult rv = NS_ERROR_FAILURE;
nsCOMPtr<nsISupportsArray> flavorList;
rv = aTransferable->FlavorsTransferableCanImport(getter_AddRefs(flavorList));
if (NS_FAILED(rv))
return rv;
// count the number of flavors
uint32_t cnt;
flavorList->Count (&cnt);
for (unsigned int i= 0; i < cnt; ++i ) {
nsCOMPtr<nsISupports> genericWrapper;
flavorList->GetElementAt(i, getter_AddRefs(genericWrapper));
nsCOMPtr<nsISupportsCString> currentFlavor;
currentFlavor = do_QueryInterface(genericWrapper);
if (currentFlavor) {
nsXPIDLCString flavorStr;
currentFlavor->ToString(getter_Copies(flavorStr));
nsCOMPtr<nsISupports> genericItem;
mSourceDataItems->GetElementAt(aItemIndex, getter_AddRefs(genericItem));
nsCOMPtr<nsITransferable> item (do_QueryInterface(genericItem));
if (item) {
nsCOMPtr<nsISupports> data;
uint32_t tmpDataLen = 0;
rv = item->GetTransferData(flavorStr, getter_AddRefs(data),
&tmpDataLen);
if (NS_SUCCEEDED(rv)) {
rv = aTransferable->SetTransferData(flavorStr, data, tmpDataLen);
break;
}
}
}
}
return rv;
}
// --------------------------------------------------------------------------
// This returns true if any of the dragged items support a specified data
// flavor. This doesn't make a lot of sense when dragging multiple items:
// all of them ought to match. OTOH, Moz doesn't support multiple drag
// items so no problems arise. If they do, use the commented-out code to
// switch from "any" to "all".
NS_IMETHODIMP nsDragService::IsDataFlavorSupported(const char *aDataFlavor,
bool *_retval)
{
if (!_retval)
return NS_ERROR_INVALID_ARG;
*_retval = false;
uint32_t numDragItems = 0;
if (mSourceDataItems)
mSourceDataItems->Count(&numDragItems);
if (!numDragItems)
return NS_OK;
// return true if all items support this flavor
// for (uint32_t itemIndex = 0, *_retval = true;
// itemIndex < numDragItems && *_retval; ++itemIndex) {
// *_retval = false;
// return true if any item supports this flavor
for (uint32_t itemIndex = 0;
itemIndex < numDragItems && !(*_retval); ++itemIndex) {
nsCOMPtr<nsISupports> genericItem;
mSourceDataItems->GetElementAt(itemIndex, getter_AddRefs(genericItem));
nsCOMPtr<nsITransferable> currItem (do_QueryInterface(genericItem));
if (currItem) {
nsCOMPtr <nsISupportsArray> flavorList;
currItem->FlavorsTransferableCanExport(getter_AddRefs(flavorList));
if (flavorList) {
uint32_t numFlavors;
flavorList->Count( &numFlavors );
for (uint32_t flavorIndex=0; flavorIndex < numFlavors; ++flavorIndex) {
nsCOMPtr<nsISupports> genericWrapper;
flavorList->GetElementAt(flavorIndex, getter_AddRefs(genericWrapper));
nsCOMPtr<nsISupportsCString> currentFlavor;
currentFlavor = do_QueryInterface(genericWrapper);
if (currentFlavor) {
nsXPIDLCString flavorStr;
currentFlavor->ToString ( getter_Copies(flavorStr) );
if (strcmp(flavorStr, aDataFlavor) == 0) {
*_retval = true;
break;
}
}
} // for each flavor
}
}
}
return NS_OK;
}
// --------------------------------------------------------------------------
// use nsIWebBrowserPersist to fetch the contents of a URL
nsresult nsDragService::SaveAsContents(PCSZ pszDest, nsIURL* aURL)
{
nsCOMPtr<nsIURI> linkURI(do_QueryInterface(aURL));
if (!linkURI)
return NS_ERROR_FAILURE;
nsCOMPtr<nsIWebBrowserPersist> webPersist(
do_CreateInstance("@mozilla.org/embedding/browser/nsWebBrowserPersist;1"));
if (!webPersist)
return NS_ERROR_FAILURE;
nsCOMPtr<nsIFile> file;
NS_NewNativeLocalFile(nsDependentCString(pszDest), true,
getter_AddRefs(file));
if (!file)
return NS_ERROR_FAILURE;
FILE* fp;
if (NS_FAILED(file->OpenANSIFileDesc("wb+", &fp)))
return NS_ERROR_FAILURE;
nsCOMPtr<nsIDOMDocument> domDoc;
GetSourceDocument(getter_AddRefs(domDoc));
nsCOMPtr<nsIDocument> document = do_QueryInterface(domDoc);
fwrite("", 0, 1, fp);
fclose(fp);
webPersist->SaveURI(linkURI, nullptr, nullptr, nullptr, nullptr, file,
document->GetLoadContext());
return NS_OK;
}
// --------------------------------------------------------------------------
// save this URL in a file that the WPS will identify as a WPUrl object
nsresult nsDragService::SaveAsURL(PCSZ pszDest, nsIURI* aURI)
{
nsAutoCString strUri;
aURI->GetSpec(strUri);
if (strUri.IsEmpty())
return NS_ERROR_FAILURE;
nsCOMPtr<nsIFile> file;
NS_NewNativeLocalFile(nsDependentCString(pszDest), true,
getter_AddRefs(file));
if (!file)
return NS_ERROR_FAILURE;
FILE* fp;
if (NS_FAILED(file->OpenANSIFileDesc("wb+", &fp)))
return NS_ERROR_FAILURE;
fwrite(strUri.get(), strUri.Length(), 1, fp);
fclose(fp);
nsCOMPtr<nsIDOMDocument> domDoc;
GetSourceDocument(getter_AddRefs(domDoc));
SaveTypeAndSource(file, domDoc, "UniformResourceLocator");
return NS_OK;
}
// --------------------------------------------------------------------------
// save this text to file after conversion to the current codepage
nsresult nsDragService::SaveAsText(PCSZ pszDest, nsISupportsString* aString)
{
nsAutoString strData;
aString->GetData(strData);
if (strData.IsEmpty())
return NS_ERROR_FAILURE;
nsCOMPtr<nsIFile> file;
NS_NewNativeLocalFile(nsDependentCString(pszDest), true,
getter_AddRefs(file));
if (!file)
return NS_ERROR_FAILURE;
nsXPIDLCString textStr;
int cnt = UnicodeToCodepage(strData, getter_Copies(textStr));
if (!cnt)
return NS_ERROR_FAILURE;
FILE* fp;
if (NS_FAILED(file->OpenANSIFileDesc("wb+", &fp)))
return NS_ERROR_FAILURE;
fwrite(textStr.get(), cnt, 1, fp);
fclose(fp);
nsCOMPtr<nsIDOMDocument> domDoc;
GetSourceDocument(getter_AddRefs(domDoc));
SaveTypeAndSource(file, domDoc, "Plain Text");
return NS_OK;
}
// --------------------------------------------------------------------------
// Split a Moz Url/Title into its components, save the Url for use by
// a native drop, then compose a title.
nsresult nsDragService::GetUrlAndTitle(nsISupports *aGenericData,
char **aTargetName)
{
// get the URL/title string
nsCOMPtr<nsISupportsString> strObject ( do_QueryInterface(aGenericData));
if (!strObject)
return NS_ERROR_FAILURE;
nsAutoString strData;
strObject->GetData(strData);
// split string into URL and Title -
// if there's a title but no URL, there's no reason to continue
int32_t lineIndex = strData.FindChar ('\n');
if (lineIndex == 0)
return NS_ERROR_FAILURE;
// get the URL portion of the text
nsAutoString strUrl;
if (lineIndex == -1)
strUrl = strData;
else
strData.Left(strUrl, lineIndex);
// save the URL for later use
nsCOMPtr<nsIURI> saveURI;
NS_NewURI(getter_AddRefs(saveURI), strUrl);
if (!saveURI)
return NS_ERROR_FAILURE;
// if there's a bona-fide title & it isn't just a copy of the URL,
// limit it to a reasonable length, perform NLS conversion, then return
if (++lineIndex && lineIndex != (int)strData.Length() &&
!strUrl.Equals(Substring(strData, lineIndex, strData.Length()))) {
uint32_t strLth = NS_MIN((int)strData.Length()-lineIndex, MAXTITLELTH);
nsAutoString strTitle;
strData.Mid(strTitle, lineIndex, strLth);
if (!UnicodeToCodepage(strTitle, aTargetName))
return NS_ERROR_FAILURE;
mSourceData = do_QueryInterface(saveURI);
mMimeType = kURLMime;
return NS_OK;
}
// if the URI can be handled as a URL, construct a title from
// the hostname & filename; if not, use the first MAXTITLELTH
// characters that appear after the scheme name
nsAutoCString strTitle;
nsCOMPtr<nsIURL> urlObj( do_QueryInterface(saveURI));
if (urlObj) {
nsAutoCString strFile;
urlObj->GetHost(strTitle);
urlObj->GetFileName(strFile);
if (!strFile.IsEmpty()) {
strTitle.AppendLiteral("/");
strTitle.Append(strFile);
}
else {
urlObj->GetDirectory(strFile);
if (strFile.Length() > 1) {
nsAutoCString::const_iterator start, end, curr;
strFile.BeginReading(start);
strFile.EndReading(end);
strFile.EndReading(curr);
for (curr.advance(-2); curr != start; --curr)
if (*curr == '/')
break;
strTitle.Append(Substring(curr, end));
}
}
}
else {
saveURI->GetSpec(strTitle);
int32_t index = strTitle.FindChar (':');
if (index != -1) {
if ((strTitle.get())[++index] == '/')
if ((strTitle.get())[++index] == '/')
++index;
strTitle.Cut(0, index);
}
if (strTitle.Length() > MAXTITLELTH)
strTitle.Truncate(MAXTITLELTH);
}
*aTargetName = ToNewCString(strTitle);
mSourceData = do_QueryInterface(saveURI);
mMimeType = kURLMime;
return NS_OK;
}
// --------------------------------------------------------------------------
// Construct a title for text drops from the leading words of the text.
// Alphanumeric characters are copied to the title; sequences of
// non-alphanums are replaced by a single space
nsresult nsDragService::GetUniTextTitle(nsISupports *aGenericData,
char **aTargetName)
{
// get the string
nsCOMPtr<nsISupportsString> strObject ( do_QueryInterface(aGenericData));
if (!strObject)
return NS_ERROR_FAILURE;
// alloc a buffer to hold the unicode title text
int bufsize = (MAXTITLELTH+1)*2;
PRUnichar * buffer = (PRUnichar*)nsMemory::Alloc(bufsize);
if (!buffer)
return NS_ERROR_FAILURE;
nsAutoString strData;
strObject->GetData(strData);
nsAutoString::const_iterator start, end;
strData.BeginReading(start);
strData.EndReading(end);
// skip over leading non-alphanumerics
for( ; start != end; ++start)
if (UniQueryChar( *start, CT_ALNUM))
break;
// move alphanumerics into the buffer & replace contiguous
// non-alnums with a single separator character
int ctr, sep;
for (ctr=0, sep=0; start != end && ctr < MAXTITLELTH; ++start) {
if (UniQueryChar( *start, CT_ALNUM)) {
buffer[ctr] = *start;
ctr++;
sep = 0;
}
else
if (!sep) {
buffer[ctr] = TITLESEPARATOR;
ctr++;
sep = 1;
}
}
// eliminate trailing separators & lone characters
// orphaned when the title is truncated
if (sep)
ctr--;
if (ctr >= MAXTITLELTH - sep && buffer[ctr-2] == TITLESEPARATOR)
ctr -= 2;
buffer[ctr] = 0;
// if we ended up with no alnums, call the result "text";
// otherwise, do NLS conversion
if (!ctr) {
*aTargetName = ToNewCString(NS_LITERAL_CSTRING("text"));
ctr = 1;
}
else
ctr = UnicodeToCodepage( nsDependentString(buffer), aTargetName);
// free our buffer, then exit
nsMemory::Free(buffer);
if (!ctr)
return NS_ERROR_FAILURE;
mSourceData = aGenericData;
mMimeType = kUnicodeMime;
return NS_OK;
}
// --------------------------------------------------------------------------
// nsIDragSessionOS2
// --------------------------------------------------------------------------
// DragOverMsg() provides minimal handling if a drag session is already
// in progress. If not, it assumes this is a native drag that has just
// entered the window and calls NativeDragEnter() to start a session.
NS_IMETHODIMP nsDragService::DragOverMsg(PDRAGINFO pdinfo, MRESULT &mr,
uint32_t* dragFlags)
{
nsresult rv = NS_ERROR_FAILURE;
if (!&mr || !dragFlags || !pdinfo || !DrgAccessDraginfo(pdinfo))
return rv;
*dragFlags = 0;
mr = MRFROM2SHORT(DOR_NEVERDROP, 0);
// examine the dragged item & "start" a drag session if OK;
// also, signal the need for a dragenter event
if (!mDoingDrag)
if (NS_SUCCEEDED(NativeDragEnter(pdinfo)))
*dragFlags |= DND_DISPATCHENTEREVENT;
// if we're in a drag, set it up to be dispatched
if (mDoingDrag) {
SetCanDrop(false);
switch (pdinfo->usOperation) {
case DO_COPY:
SetDragAction(DRAGDROP_ACTION_COPY);
break;
case DO_LINK:
SetDragAction(DRAGDROP_ACTION_LINK);
break;
default:
SetDragAction(DRAGDROP_ACTION_MOVE);
break;
}
if (mSourceNode)
*dragFlags |= DND_DISPATCHEVENT | DND_GETDRAGOVERRESULT | DND_MOZDRAG;
else
*dragFlags |= DND_DISPATCHEVENT | DND_GETDRAGOVERRESULT | DND_NATIVEDRAG;
rv = NS_OK;
}
DrgFreeDraginfo(pdinfo);
return rv;
}
// --------------------------------------------------------------------------
// Evaluates native drag data, and if acceptable, creates & stores
// a transferable with the available flavors (but not the data);
// if successful, it "starts" the session.
NS_IMETHODIMP nsDragService::NativeDragEnter(PDRAGINFO pdinfo)
{
nsresult rv = NS_ERROR_FAILURE;
bool isFQFile = FALSE;
bool isAtom = FALSE;
PDRAGITEM pditem = 0;
if (pdinfo->cditem != 1)
return rv;
pditem = DrgQueryDragitemPtr(pdinfo, 0);
if (pditem) {
if (DrgVerifyRMF(pditem, "DRM_ATOM", 0)) {
isAtom = TRUE;
rv = NS_OK;
}
else
if (DrgVerifyRMF(pditem, "DRM_DTSHARE", 0))
rv = NS_OK;
else
if (DrgVerifyRMF(pditem, "DRM_OS2FILE", 0)) {
rv = NS_OK;
if (pditem->hstrContainerName && pditem->hstrSourceName)
isFQFile = TRUE;
}
}
if (NS_SUCCEEDED(rv)) {
rv = NS_ERROR_FAILURE;
nsCOMPtr<nsITransferable> trans(
do_CreateInstance("@mozilla.org/widget/transferable;1", &rv));
if (trans) {
trans->Init(nullptr);
bool isUrl = DrgVerifyType(pditem, "UniformResourceLocator");
bool isAlt = (WinGetKeyState(HWND_DESKTOP, VK_ALT) & 0x8000);
// if this is a fully-qualified file or the item claims to be
// a Url, identify it as a Url & also offer it as html
if ((isFQFile && !isAlt) || isUrl) {
trans->AddDataFlavor(kURLMime);
trans->AddDataFlavor(kHTMLMime);
}
// everything is always "text"
trans->AddDataFlavor(kUnicodeMime);
// if we can create the array, initialize the session
nsCOMPtr<nsISupportsArray> transArray(
do_CreateInstance("@mozilla.org/supports-array;1", &rv));
if (transArray) {
transArray->InsertElementAt(trans, 0);
mSourceDataItems = transArray;
// add the dragged data to the transferable if we have easy access
// to it (i.e. no need to read a file or request rendering); for
// URLs, we'll skip creating a title until the drop occurs
nsXPIDLCString someText;
if (isAtom) {
if (NS_SUCCEEDED(GetAtom(pditem->ulItemID, getter_Copies(someText))))
NativeDataToTransferable( someText.get(), 0, isUrl);
}
else
if (isFQFile && !isAlt &&
NS_SUCCEEDED(GetFileName(pditem, getter_Copies(someText)))) {
nsCOMPtr<nsIFile> file;
if (NS_SUCCEEDED(NS_NewNativeLocalFile(someText, true,
getter_AddRefs(file)))) {
nsAutoCString textStr;
NS_GetURLSpecFromFile(file, textStr);
if (!textStr.IsEmpty()) {
someText.Assign(ToNewCString(textStr));
NativeDataToTransferable( someText.get(), 0, TRUE);
}
}
}
mSourceNode = 0;
mSourceDocument = 0;
mDoingDrag = TRUE;
rv = NS_OK;
}
}
}
return rv;
}
// --------------------------------------------------------------------------
// Invoked after a dragover event has been dispatched, this constructs
// a reply to DM_DRAGOVER based on the canDrop & dragAction attributes.
NS_IMETHODIMP nsDragService::GetDragoverResult(MRESULT& mr)
{
nsresult rv = NS_ERROR_FAILURE;
if (!&mr)
return rv;
if (mDoingDrag) {
bool canDrop = false;
USHORT usDrop;
GetCanDrop(&canDrop);
if (canDrop)
usDrop = DOR_DROP;
else
usDrop = DOR_NODROP;
uint32_t action;
USHORT usOp;
GetDragAction(&action);
if (action & DRAGDROP_ACTION_COPY)
usOp = DO_COPY;
else
if (action & DRAGDROP_ACTION_LINK)
usOp = DO_LINK;
else {
if (mSourceNode)
usOp = DO_MOVE;
else
usOp = DO_UNKNOWN+1;
if (action == DRAGDROP_ACTION_NONE)
usDrop = DOR_NODROP;
}
mr = MRFROM2SHORT(usDrop, usOp);
rv = NS_OK;
}
else
mr = MRFROM2SHORT(DOR_NEVERDROP, 0);
return rv;
}
// --------------------------------------------------------------------------
// have the client dispatch the event, then call ExitSession()
NS_IMETHODIMP nsDragService::DragLeaveMsg(PDRAGINFO pdinfo, uint32_t* dragFlags)
{
if (!mDoingDrag || !dragFlags)
return NS_ERROR_FAILURE;
if (mSourceNode)
*dragFlags = DND_DISPATCHEVENT | DND_EXITSESSION | DND_MOZDRAG;
else
*dragFlags = DND_DISPATCHEVENT | DND_EXITSESSION | DND_NATIVEDRAG;
return NS_OK;
}
// --------------------------------------------------------------------------
// DropHelp occurs when you press F1 during a drag; apparently,
// it's like a regular drop in that the target has to do clean up
NS_IMETHODIMP nsDragService::DropHelpMsg(PDRAGINFO pdinfo, uint32_t* dragFlags)
{
if (!mDoingDrag)
return NS_ERROR_FAILURE;
if (pdinfo && DrgAccessDraginfo(pdinfo)) {
DrgDeleteDraginfoStrHandles(pdinfo);
DrgFreeDraginfo(pdinfo);
}
if (!dragFlags)
return NS_ERROR_FAILURE;
if (mSourceNode)
*dragFlags = DND_DISPATCHEVENT | DND_EXITSESSION | DND_MOZDRAG;
else
*dragFlags = DND_DISPATCHEVENT | DND_EXITSESSION | DND_NATIVEDRAG;
return NS_OK;
}
// --------------------------------------------------------------------------
// for native drags, clean up;
// for all drags, signal that Moz is no longer in d&d mode
NS_IMETHODIMP nsDragService::ExitSession(uint32_t* dragFlags)
{
if (!mDoingDrag)
return NS_ERROR_FAILURE;
if (!mSourceNode) {
mSourceDataItems = 0;
mDataTransfer = 0;
mDoingDrag = FALSE;
// if we created a temp file, delete it
if (gTempFile) {
DosDelete(gTempFile);
nsMemory::Free(gTempFile);
gTempFile = 0;
}
}
if (!dragFlags)
return NS_ERROR_FAILURE;
*dragFlags = 0;
return NS_OK;
}
// --------------------------------------------------------------------------
// If DropMsg() is presented with native data that has to be rendered,
// the drop event & cleanup will be defered until the client's window
// has received a render-complete msg.
NS_IMETHODIMP nsDragService::DropMsg(PDRAGINFO pdinfo, HWND hwnd,
uint32_t* dragFlags)
{
if (!mDoingDrag || !dragFlags || !pdinfo || !DrgAccessDraginfo(pdinfo))
return NS_ERROR_FAILURE;
switch (pdinfo->usOperation) {
case DO_MOVE:
SetDragAction(DRAGDROP_ACTION_MOVE);
break;
case DO_COPY:
SetDragAction(DRAGDROP_ACTION_COPY);
break;
case DO_LINK:
SetDragAction(DRAGDROP_ACTION_LINK);
break;
default: // avoid "moving" (i.e. deleting) native text/objects
if (mSourceNode)
SetDragAction(DRAGDROP_ACTION_MOVE);
else
SetDragAction(DRAGDROP_ACTION_COPY);
break;
}
// if this is a native drag, move the source data to a transferable;
// request rendering if needed
nsresult rv = NS_OK;
bool rendering = false;
if (!mSourceNode)
rv = NativeDrop( pdinfo, hwnd, &rendering);
// note: NativeDrop() sends an end-conversation msg to native
// sources but nothing sends them to Mozilla - however, Mozilla
// (i.e. nsDragService) doesn't need them, so...
// if rendering, the action flags are off because we don't want
// the client to do anything yet; the status flags are off because
// we'll be exiting d&d mode before the next screen update occurs
if (rendering)
*dragFlags = 0;
else {
// otherwise, set the flags & free the native drag structures
*dragFlags = DND_EXITSESSION;
if (NS_SUCCEEDED(rv)) {
if (mSourceNode)
*dragFlags |= DND_DISPATCHEVENT | DND_INDROP | DND_MOZDRAG;
else
*dragFlags |= DND_DISPATCHEVENT | DND_INDROP | DND_NATIVEDRAG;
}
DrgDeleteDraginfoStrHandles(pdinfo);
DrgFreeDraginfo(pdinfo);
rv = NS_OK;
}
return rv;
}
// --------------------------------------------------------------------------
// Invoked by DropMsg to fill a transferable with native data;
// if necessary, requests the source to render it.
NS_IMETHODIMP nsDragService::NativeDrop(PDRAGINFO pdinfo, HWND hwnd,
bool* rendering)
{
*rendering = false;
nsresult rv = NS_ERROR_FAILURE;
PDRAGITEM pditem = DrgQueryDragitemPtr(pdinfo, 0);
if (!pditem)
return rv;
nsXPIDLCString dropText;
bool isUrl = DrgVerifyType(pditem, "UniformResourceLocator");
// identify format; the order of evaluation here is important
// DRM_ATOM - DragText stores up to 255 chars in a Drg API atom
// DRM_DTSHARE - DragText renders up to 1mb to named shared mem
if (DrgVerifyRMF(pditem, "DRM_ATOM", 0))
rv = GetAtom(pditem->ulItemID, getter_Copies(dropText));
else
if (DrgVerifyRMF(pditem, "DRM_DTSHARE", 0)) {
rv = RenderToDTShare( pditem, hwnd);
if (NS_SUCCEEDED(rv))
*rendering = true;
}
// DRM_OS2FILE - get the file's path or contents if it exists;
// request rendering if it doesn't
else
if (DrgVerifyRMF(pditem, "DRM_OS2FILE", 0)) {
bool isAlt = (WinGetKeyState(HWND_DESKTOP, VK_ALT) & 0x8000);
// the file has to be rendered - currently, we only present
// its content, not its name, to Moz to avoid conflicts
if (!pditem->hstrContainerName || !pditem->hstrSourceName) {
rv = RenderToOS2File( pditem, hwnd);
if (NS_SUCCEEDED(rv))
*rendering = true;
}
// for Url objects and 'Alt+Drop', get the file's contents;
// otherwise, convert it's path to a Url
else {
nsXPIDLCString fileName;
if (NS_SUCCEEDED(GetFileName(pditem, getter_Copies(fileName)))) {
if (isUrl || isAlt)
rv = GetFileContents(fileName.get(), getter_Copies(dropText));
else {
isUrl = true;
nsCOMPtr<nsIFile> file;
if (NS_SUCCEEDED(NS_NewNativeLocalFile(fileName,
true, getter_AddRefs(file)))) {
nsAutoCString textStr;
NS_GetURLSpecFromFile(file, textStr);
if (!textStr.IsEmpty()) {
dropText.Assign(ToNewCString(textStr));
rv = NS_OK;
}
}
} // filename as Url
} // got filename
} // existing files
} // DRM_OS2FILE
// if OK, put what data there is in the transferable; this could be
// everything needed or just the title of a Url that needs rendering
if (NS_SUCCEEDED(rv)) {
// for Urls, get the title & remove any linefeeds
nsXPIDLCString titleText;
if (isUrl &&
pditem->hstrTargetName &&
NS_SUCCEEDED(GetAtom(pditem->hstrTargetName, getter_Copies(titleText))))
for (char* ptr=strchr(titleText.BeginWriting(),'\n'); ptr; ptr=strchr(ptr, '\n'))
*ptr = ' ';
rv = NativeDataToTransferable( dropText.get(), titleText.get(), isUrl);
}
// except for renderings, tell the source we're done with the data
if (!*rendering)
DrgSendTransferMsg( pditem->hwndItem, DM_ENDCONVERSATION,
(MPARAM)pditem->ulItemID,
(MPARAM)DMFL_TARGETSUCCESSFUL);
return (rv);
}
// --------------------------------------------------------------------------
// Because RenderCompleteMsg() is called after the native (PM) drag
// session has ended, all of the drag status flags should be off.
//
// FYI... PM's asynchronous rendering mechanism is not compatible with
// nsIDataFlavorProvider which expects data to be rendered synchronously
NS_IMETHODIMP nsDragService::RenderCompleteMsg(PDRAGTRANSFER pdxfer,
USHORT usResult, uint32_t* dragFlags)
{
nsresult rv = NS_ERROR_FAILURE;
if (!mDoingDrag || !pdxfer)
return rv;
// this msg should never come from Moz - if it does, fail
if (!mSourceNode)
rv = NativeRenderComplete(pdxfer, usResult);
// DrgQueryDraginfoPtrFromDragitem() doesn't work - this does
PDRAGINFO pdinfo = (PDRAGINFO)MAKEULONG(0x2c, HIUSHORT(pdxfer->pditem));
DrgDeleteStrHandle(pdxfer->hstrSelectedRMF);
DrgDeleteStrHandle(pdxfer->hstrRenderToName);
DrgFreeDragtransfer(pdxfer);
// if the source is Moz, don't touch pdinfo - it's been freed already
if (pdinfo && !mSourceNode) {
DrgDeleteDraginfoStrHandles(pdinfo);
DrgFreeDraginfo(pdinfo);
}
// this shouldn't happen
if (!dragFlags)
return (ExitSession(dragFlags));
// d&d is over, so the DND_DragStatus flags should all be off
*dragFlags = DND_EXITSESSION;
if (NS_SUCCEEDED(rv))
*dragFlags |= DND_DISPATCHEVENT;
// lie so the client will honor the exit-session flag
return NS_OK;
}
// --------------------------------------------------------------------------
// this is here to provide a false sense of symmetry with the other
// method-pairs - rendered data always comes from a native source
NS_IMETHODIMP nsDragService::NativeRenderComplete(PDRAGTRANSFER pdxfer,
USHORT usResult)
{
nsresult rv = NS_ERROR_FAILURE;
nsXPIDLCString rmf;
// identify the rendering mechanism, then get the data
if (NS_SUCCEEDED(GetAtom(pdxfer->hstrSelectedRMF, getter_Copies(rmf)))) {
nsXPIDLCString dropText;
if (!strcmp(rmf.get(), DTSHARE_RMF))
rv = RenderToDTShareComplete(pdxfer, usResult, getter_Copies(dropText));
else
if (!strcmp(rmf.get(), OS2FILE_TXTRMF) ||
!strcmp(rmf.get(), OS2FILE_UNKRMF))
rv = RenderToOS2FileComplete(pdxfer, usResult, true,
getter_Copies(dropText));
if (NS_SUCCEEDED(rv)) {
bool isUrl = false;
IsDataFlavorSupported(kURLMime, &isUrl);
rv = NativeDataToTransferable( dropText.get(), 0, isUrl);
}
}
DrgSendTransferMsg(pdxfer->hwndClient, DM_ENDCONVERSATION,
(MPARAM)pdxfer->ulTargetInfo,
(MPARAM)DMFL_TARGETSUCCESSFUL);
return rv;
}
// --------------------------------------------------------------------------
// fills the transferable created by NativeDragEnter with
// the set of flavors and data the target will see onDrop
NS_IMETHODIMP nsDragService::NativeDataToTransferable( PCSZ pszText,
PCSZ pszTitle, bool isUrl)
{
nsresult rv = NS_ERROR_FAILURE;
// the transferable should have been created on DragEnter
if (!mSourceDataItems)
return rv;
nsCOMPtr<nsISupports> genericItem;
mSourceDataItems->GetElementAt(0, getter_AddRefs(genericItem));
nsCOMPtr<nsITransferable> trans (do_QueryInterface(genericItem));
if (!trans)
return rv;
// remove invalid flavors
if (!isUrl) {
trans->RemoveDataFlavor(kURLMime);
trans->RemoveDataFlavor(kHTMLMime);
}
// if there's no text, exit - but first see if we have the title of
// a Url that needs to be rendered; if so, stash it for later use
if (!pszText || !*pszText) {
if (isUrl && pszTitle && *pszTitle) {
nsXPIDLString outTitle;
if (CodepageToUnicode(nsDependentCString(pszTitle),
getter_Copies(outTitle))) {
nsCOMPtr<nsISupportsString> urlPrimitive(
do_CreateInstance(NS_SUPPORTS_STRING_CONTRACTID));
if (urlPrimitive ) {
urlPrimitive->SetData(outTitle);
trans->SetTransferData(kURLDescriptionMime, urlPrimitive,
2*outTitle.Length());
}
}
}
return NS_OK;
}
nsXPIDLString outText;
if (!CodepageToUnicode(nsDependentCString(pszText), getter_Copies(outText)))
return rv;
if (isUrl) {
// if no title was supplied, see if it was stored in the transferable
nsXPIDLString outTitle;
if (pszTitle && *pszTitle) {
if (!CodepageToUnicode(nsDependentCString(pszTitle),
getter_Copies(outTitle)))
return rv;
}
else {
uint32_t len;
nsCOMPtr<nsISupports> genericData;
if (NS_SUCCEEDED(trans->GetTransferData(kURLDescriptionMime,
getter_AddRefs(genericData), &len))) {
nsCOMPtr<nsISupportsString> strObject(do_QueryInterface(genericData));
if (strObject)
strObject->GetData(outTitle);
}
}
// construct the Url flavor
nsCOMPtr<nsISupportsString> urlPrimitive(
do_CreateInstance(NS_SUPPORTS_STRING_CONTRACTID));
if (urlPrimitive ) {
if (outTitle.IsEmpty()) {
urlPrimitive->SetData(outText);
trans->SetTransferData(kURLMime, urlPrimitive, 2*outText.Length());
}
else {
nsString urlStr( outText + NS_LITERAL_STRING("\n") + outTitle);
urlPrimitive->SetData(urlStr);
trans->SetTransferData(kURLMime, urlPrimitive, 2*urlStr.Length());
}
rv = NS_OK;
}
// construct the HTML flavor - for supported graphics,
// use an IMG tag, for all others create a link
nsCOMPtr<nsISupportsString> htmlPrimitive(
do_CreateInstance(NS_SUPPORTS_STRING_CONTRACTID));
if (htmlPrimitive ) {
nsString htmlStr;
nsCOMPtr<nsIURI> uri;
rv = NS_ERROR_FAILURE;
if (NS_SUCCEEDED(NS_NewURI(getter_AddRefs(uri), pszText))) {
nsCOMPtr<nsIURL> url (do_QueryInterface(uri));
if (url) {
nsAutoCString extension;
url->GetFileExtension(extension);
if (!extension.IsEmpty()) {
if (extension.LowerCaseEqualsLiteral("gif") ||
extension.LowerCaseEqualsLiteral("jpg") ||
extension.LowerCaseEqualsLiteral("png") ||
extension.LowerCaseEqualsLiteral("jpeg"))
rv = NS_OK;
}
}
}
if (NS_SUCCEEDED(rv))
htmlStr.Assign(NS_LITERAL_STRING("<img src=\"") +
outText +
NS_LITERAL_STRING("\" alt=\"") +
outTitle +
NS_LITERAL_STRING("\"/>") );
else
htmlStr.Assign(NS_LITERAL_STRING("<a href=\"") +
outText +
NS_LITERAL_STRING("\">") +
(outTitle.IsEmpty() ? outText : outTitle) +
NS_LITERAL_STRING("</a>") );
htmlPrimitive->SetData(htmlStr);
trans->SetTransferData(kHTMLMime, htmlPrimitive, 2*htmlStr.Length());
rv = NS_OK;
}
}
// add the Text flavor
nsCOMPtr<nsISupportsString> textPrimitive(
do_CreateInstance(NS_SUPPORTS_STRING_CONTRACTID));
if (textPrimitive ) {
textPrimitive->SetData(nsDependentString(outText));
trans->SetTransferData(kUnicodeMime, textPrimitive, 2*outText.Length());
rv = NS_OK;
}
// return OK if we put anything in the transferable
return rv;
}
// --------------------------------------------------------------------------
// Helper functions
// --------------------------------------------------------------------------
// currently, the same filename is used for every render request;
// it is deleted when the drag session ends
nsresult RenderToOS2File( PDRAGITEM pditem, HWND hwnd)
{
nsresult rv = NS_ERROR_FAILURE;
nsXPIDLCString fileName;
if (NS_SUCCEEDED(GetTempFileName(getter_Copies(fileName)))) {
const char * pszRMF;
if (DrgVerifyRMF(pditem, "DRM_OS2FILE", "DRF_TEXT"))
pszRMF = OS2FILE_TXTRMF;
else
pszRMF = OS2FILE_UNKRMF;
rv = RequestRendering( pditem, hwnd, pszRMF, fileName.get());
}
return rv;
}
// --------------------------------------------------------------------------
// return a buffer with the rendered file's Url or contents
nsresult RenderToOS2FileComplete(PDRAGTRANSFER pdxfer, USHORT usResult,
bool content, char** outText)
{
nsresult rv = NS_ERROR_FAILURE;
// for now, override content flag & always return content
content = true;
if (usResult & DMFL_RENDEROK) {
if (NS_SUCCEEDED(GetAtom( pdxfer->hstrRenderToName, &gTempFile))) {
if (content)
rv = GetFileContents(gTempFile, outText);
else {
nsCOMPtr<nsIFile> file;
if (NS_SUCCEEDED(NS_NewNativeLocalFile(nsDependentCString(gTempFile),
true, getter_AddRefs(file)))) {
nsAutoCString textStr;
NS_GetURLSpecFromFile(file, textStr);
if (!textStr.IsEmpty()) {
*outText = ToNewCString(textStr);
rv = NS_OK;
}
}
}
}
}
// gTempFile will be deleted when ExitSession() is called
return rv;
}
// --------------------------------------------------------------------------
// DTShare uses 1mb of uncommitted named-shared memory
// (next time I'll do it differently - rw)
nsresult RenderToDTShare( PDRAGITEM pditem, HWND hwnd)
{
nsresult rv;
void * pMem;
#ifdef MOZ_OS2_HIGH_MEMORY
APIRET rc = DosAllocSharedMem( &pMem, DTSHARE_NAME, 0x100000,
PAG_WRITE | PAG_READ | OBJ_ANY);
if (rc != NO_ERROR &&
rc != ERROR_ALREADY_EXISTS) { // Did the kernel handle OBJ_ANY?
// Try again without OBJ_ANY and if the first failure was not caused
// by OBJ_ANY then we will get the same failure, else we have taken
// care of pre-FP13 systems where the kernel couldn't handle it.
rc = DosAllocSharedMem( &pMem, DTSHARE_NAME, 0x100000,
PAG_WRITE | PAG_READ);
}
#else
APIRET rc = DosAllocSharedMem( &pMem, DTSHARE_NAME, 0x100000,
PAG_WRITE | PAG_READ);
#endif
if (rc == ERROR_ALREADY_EXISTS)
rc = DosGetNamedSharedMem( &pMem, DTSHARE_NAME,
PAG_WRITE | PAG_READ);
if (rc)
rv = NS_ERROR_FAILURE;
else
rv = RequestRendering( pditem, hwnd, DTSHARE_RMF, DTSHARE_NAME);
return rv;
}
// --------------------------------------------------------------------------
// return a buffer with the rendered text
nsresult RenderToDTShareComplete(PDRAGTRANSFER pdxfer, USHORT usResult,
char** outText)
{
nsresult rv = NS_ERROR_FAILURE;
void * pMem;
char * pszText = 0;
APIRET rc = DosGetNamedSharedMem( &pMem, DTSHARE_NAME, PAG_WRITE | PAG_READ);
if (!rc) {
if (usResult & DMFL_RENDEROK) {
pszText = (char*)nsMemory::Alloc( ((ULONG*)pMem)[0] + 1);
if (pszText) {
strcpy(pszText, &((char*)pMem)[sizeof(ULONG)] );
RemoveCarriageReturns(pszText);
*outText = pszText;
rv = NS_OK;
}
}
// using DosGetNamedSharedMem() on memory we allocated appears
// to increment its usage ctr, so we have to free it 2x
DosFreeMem(pMem);
DosFreeMem(pMem);
}
return rv;
}
// --------------------------------------------------------------------------
// a generic request dispatcher
nsresult RequestRendering( PDRAGITEM pditem, HWND hwnd, PCSZ pRMF, PCSZ pName)
{
PDRAGTRANSFER pdxfer = DrgAllocDragtransfer( 1);
if (!pdxfer)
return NS_ERROR_FAILURE;
pdxfer->cb = sizeof(DRAGTRANSFER);
pdxfer->hwndClient = hwnd;
pdxfer->pditem = pditem;
pdxfer->hstrSelectedRMF = DrgAddStrHandle( pRMF);
pdxfer->hstrRenderToName = 0;
pdxfer->ulTargetInfo = pditem->ulItemID;
pdxfer->usOperation = (USHORT)DO_COPY;
pdxfer->fsReply = 0;
// send the msg before setting a render-to name
if (pditem->fsControl & DC_PREPAREITEM)
DrgSendTransferMsg( pditem->hwndItem, DM_RENDERPREPARE, (MPARAM)pdxfer, 0);
pdxfer->hstrRenderToName = DrgAddStrHandle( pName);
// send the msg after setting a render-to name
if ((pditem->fsControl & (DC_PREPARE | DC_PREPAREITEM)) == DC_PREPARE)
DrgSendTransferMsg( pditem->hwndItem, DM_RENDERPREPARE, (MPARAM)pdxfer, 0);
// ask the source to render the selected item
if (!DrgSendTransferMsg( pditem->hwndItem, DM_RENDER, (MPARAM)pdxfer, 0))
return NS_ERROR_FAILURE;
return NS_OK;
}
// --------------------------------------------------------------------------
// return a ptr to a buffer containing the text associated
// with a drag atom; the caller frees the buffer
nsresult GetAtom( ATOM aAtom, char** outText)
{
nsresult rv = NS_ERROR_FAILURE;
ULONG ulInLength = DrgQueryStrNameLen(aAtom);
if (ulInLength) {
char* pszText = (char*)nsMemory::Alloc(++ulInLength);
if (pszText) {
DrgQueryStrName(aAtom, ulInLength, pszText);
RemoveCarriageReturns(pszText);
*outText = pszText;
rv = NS_OK;
}
}
return rv;
}
// --------------------------------------------------------------------------
// return a ptr to a buffer containing the file path specified
// in the dragitem; the caller frees the buffer
nsresult GetFileName(PDRAGITEM pditem, char** outText)
{
nsresult rv = NS_ERROR_FAILURE;
ULONG cntCnr = DrgQueryStrNameLen(pditem->hstrContainerName);
ULONG cntSrc = DrgQueryStrNameLen(pditem->hstrSourceName);
char* pszText = (char*)nsMemory::Alloc(cntCnr+cntSrc+1);
if (pszText) {
DrgQueryStrName(pditem->hstrContainerName, cntCnr+1, pszText);
DrgQueryStrName(pditem->hstrSourceName, cntSrc+1, &pszText[cntCnr]);
pszText[cntCnr+cntSrc] = 0;
*outText = pszText;
rv = NS_OK;
}
return rv;
}
// --------------------------------------------------------------------------
// read the file; if successful, return a ptr to its contents;
// the caller frees the buffer
nsresult GetFileContents(PCSZ pszPath, char** outText)
{
nsresult rv = NS_ERROR_FAILURE;
char* pszText = 0;
if (pszPath) {
FILE *fp = fopen(pszPath, "r");
if (fp) {
fseek(fp, 0, SEEK_END);
ULONG filesize = ftell(fp);
fseek(fp, 0, SEEK_SET);
if (filesize > 0) {
size_t readsize = (size_t)filesize;
pszText = (char*)nsMemory::Alloc(readsize+1);
if (pszText) {
readsize = fread((void *)pszText, 1, readsize, fp);
if (readsize) {
pszText[readsize] = '\0';
RemoveCarriageReturns(pszText);
*outText = pszText;
rv = NS_OK;
}
else {
nsMemory::Free(pszText);
pszText = 0;
}
}
}
fclose(fp);
}
}
return rv;
}
// --------------------------------------------------------------------------
// currently, this returns the same path & filename every time
nsresult GetTempFileName(char** outText)
{
char * pszText = (char*)nsMemory::Alloc(CCHMAXPATH);
if (!pszText)
return NS_ERROR_FAILURE;
const char * pszPath;
if (!DosScanEnv("TEMP", &pszPath) || !DosScanEnv("TMP", &pszPath))
strcpy(pszText, pszPath);
else
if (DosQueryPathInfo(".\\.", FIL_QUERYFULLNAME, pszText, CCHMAXPATH))
pszText[0] = 0;
strcat(pszText, "\\");
strcat(pszText, OS2FILE_NAME);
*outText = pszText;
return NS_OK;
}
// --------------------------------------------------------------------------
// --------------------------------------------------------------------------
// set the file's .TYPE and .SUBJECT EAs; since this is non-critical
// (though highly desirable), errors aren't reported
void SaveTypeAndSource(nsIFile *file, nsIDOMDocument *domDoc,
PCSZ pszType)
{
if (!file)
return;
nsCOMPtr<nsILocalFileOS2> os2file(do_QueryInterface(file));
if (!os2file ||
NS_FAILED(os2file->SetFileTypes(nsDependentCString(pszType))))
return;
// since the filetype has to be saved, this function
// may be called even if there isn't any document
if (!domDoc)
return;
nsCOMPtr<nsIDocument> doc(do_QueryInterface(domDoc));
if (!doc)
return;
// this gets the top-level content URL when frames are used;
// when nextDoc is zero, currDoc is the browser window, and
// prevDoc points to the content;
// note: neither GetParentDocument() nor GetDocumentURI()
// refcount the pointers they return, so nsCOMPtr isn't needed
nsIDocument *prevDoc;
nsIDocument *currDoc = doc;
nsIDocument *nextDoc = doc;
do {
prevDoc = currDoc;
currDoc = nextDoc;
nextDoc = currDoc->GetParentDocument();
} while (nextDoc);
nsIURI* srcUri = prevDoc->GetDocumentURI();
if (!srcUri)
return;
// identifying content as coming from chrome is none too useful...
bool ignore = false;
srcUri->SchemeIs("chrome", &ignore);
if (ignore)
return;
nsAutoCString url;
srcUri->GetSpec(url);
os2file->SetFileSource(url);
return;
}
// --------------------------------------------------------------------------
// to do: this needs to take into account the current page's encoding
// if it is different than the PM codepage
int UnicodeToCodepage(const nsAString& aString, char **aResult)
{
nsAutoCharBuffer buffer;
int32_t bufLength;
WideCharToMultiByte(0, PromiseFlatString(aString).get(), aString.Length(),
buffer, bufLength);
*aResult = ToNewCString(nsDependentCString(buffer.Elements()));
return bufLength;
}
// --------------------------------------------------------------------------
int CodepageToUnicode(const nsACString& aString, PRUnichar **aResult)
{
nsAutoChar16Buffer buffer;
int32_t bufLength;
MultiByteToWideChar(0, PromiseFlatCString(aString).get(),
aString.Length(), buffer, bufLength);
*aResult = ToNewUnicode(nsDependentString(buffer.Elements()));
return bufLength;
}
// --------------------------------------------------------------------------
// removes carriage returns in-place; it should only be used on
// raw text buffers that haven't been assigned to a string object
void RemoveCarriageReturns(char * pszText)
{
ULONG cnt;
char * next;
char * source;
char * target;
target = strchr(pszText, 0x0d);
if (!target)
return;
source = target + 1;
while ((next = strchr(source, 0x0d)) != 0) {
cnt = next - source;
memcpy(target, source, cnt);
target += cnt;
source = next + 1;
}
strcpy(target, source);
return;
}
// --------------------------------------------------------------------------
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