forked from mirrors/gecko-dev
405 lines
12 KiB
C++
405 lines
12 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 <shlobj.h>
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#include "nsDataObjCollection.h"
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#include "nsClipboard.h"
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#include "IEnumFE.h"
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#include <ole2.h>
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// {25589C3E-1FAC-47b9-BF43-CAEA89B79533}
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const IID IID_IDataObjCollection =
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{0x25589c3e, 0x1fac, 0x47b9, {0xbf, 0x43, 0xca, 0xea, 0x89, 0xb7, 0x95, 0x33}};
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/*
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* Class nsDataObjCollection
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*/
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nsDataObjCollection::nsDataObjCollection()
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: m_cRef(0)
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{
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}
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nsDataObjCollection::~nsDataObjCollection()
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{
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mDataObjects.Clear();
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}
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// IUnknown interface methods - see iunknown.h for documentation
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STDMETHODIMP nsDataObjCollection::QueryInterface(REFIID riid, void** ppv)
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{
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*ppv=nullptr;
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if ( (IID_IUnknown == riid) || (IID_IDataObject == riid) ) {
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*ppv = static_cast<IDataObject*>(this);
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AddRef();
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return NOERROR;
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}
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if ( IID_IDataObjCollection == riid ) {
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*ppv = static_cast<nsIDataObjCollection*>(this);
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AddRef();
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return NOERROR;
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}
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//offer to operate asynchronously (required by nsDragService)
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if (IID_IAsyncOperation == riid) {
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*ppv = static_cast<IAsyncOperation*>(this);
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AddRef();
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return NOERROR;
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}
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return E_NOINTERFACE;
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}
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STDMETHODIMP_(ULONG) nsDataObjCollection::AddRef()
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{
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return ++m_cRef;
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}
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STDMETHODIMP_(ULONG) nsDataObjCollection::Release()
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{
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if (0 != --m_cRef)
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return m_cRef;
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delete this;
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return 0;
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}
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// IDataObject methods
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STDMETHODIMP nsDataObjCollection::GetData(LPFORMATETC pFE, LPSTGMEDIUM pSTM)
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{
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static CLIPFORMAT fileDescriptorFlavorA =
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::RegisterClipboardFormat(CFSTR_FILEDESCRIPTORA);
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static CLIPFORMAT fileDescriptorFlavorW =
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::RegisterClipboardFormat(CFSTR_FILEDESCRIPTORW);
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static CLIPFORMAT fileFlavor = ::RegisterClipboardFormat(CFSTR_FILECONTENTS);
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switch (pFE->cfFormat) {
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case CF_TEXT:
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case CF_UNICODETEXT:
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return GetText(pFE, pSTM);
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case CF_HDROP:
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return GetFile(pFE, pSTM);
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default:
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if (pFE->cfFormat == fileDescriptorFlavorA ||
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pFE->cfFormat == fileDescriptorFlavorW) {
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return GetFileDescriptors(pFE, pSTM);
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}
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if (pFE->cfFormat == fileFlavor) {
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return GetFileContents(pFE, pSTM);
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}
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}
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return GetFirstSupporting(pFE, pSTM);
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}
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STDMETHODIMP nsDataObjCollection::GetDataHere(LPFORMATETC pFE, LPSTGMEDIUM pSTM)
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{
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return E_FAIL;
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}
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// Other objects querying to see if we support a particular format
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STDMETHODIMP nsDataObjCollection::QueryGetData(LPFORMATETC pFE)
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{
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UINT format = nsClipboard::GetFormat(MULTI_MIME);
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if (format == pFE->cfFormat) {
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return S_OK;
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}
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for (uint32_t i = 0; i < mDataObjects.Length(); ++i) {
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IDataObject * dataObj = mDataObjects.ElementAt(i);
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if (S_OK == dataObj->QueryGetData(pFE)) {
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return S_OK;
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}
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}
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return DV_E_FORMATETC;
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}
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STDMETHODIMP nsDataObjCollection::SetData(LPFORMATETC pFE,
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LPSTGMEDIUM pSTM,
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BOOL fRelease)
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{
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// Set arbitrary data formats on the first object in the collection and let
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// it handle the heavy lifting
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if (mDataObjects.Length() == 0)
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return E_FAIL;
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return mDataObjects.ElementAt(0)->SetData(pFE, pSTM, fRelease);
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}
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// Registers a DataFlavor/FE pair
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void nsDataObjCollection::AddDataFlavor(const char * aDataFlavor,
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LPFORMATETC aFE)
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{
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// Add the FormatEtc to our list if it's not already there. We don't care
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// about the internal aDataFlavor because nsDataObj handles that.
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IEnumFORMATETC * ifEtc;
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FORMATETC fEtc;
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ULONG num;
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if (S_OK != this->EnumFormatEtc(DATADIR_GET, &ifEtc))
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return;
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while (S_OK == ifEtc->Next(1, &fEtc, &num)) {
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NS_ASSERTION(1 == num,
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"Bit off more than we can chew in nsDataObjCollection::AddDataFlavor");
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if (FormatsMatch(fEtc, *aFE)) {
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ifEtc->Release();
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return;
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}
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} // If we didn't find a matching format, add this one
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ifEtc->Release();
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m_enumFE->AddFormatEtc(aFE);
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}
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// We accept ownership of the nsDataObj which we free on destruction
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void nsDataObjCollection::AddDataObject(IDataObject * aDataObj)
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{
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nsDataObj* dataObj = reinterpret_cast<nsDataObj*>(aDataObj);
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mDataObjects.AppendElement(dataObj);
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}
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// Methods for getting data
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HRESULT nsDataObjCollection::GetFile(LPFORMATETC pFE, LPSTGMEDIUM pSTM)
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{
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STGMEDIUM workingmedium;
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FORMATETC fe = *pFE;
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HGLOBAL hGlobalMemory;
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HRESULT hr;
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// Make enough space for the header and the trailing null
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uint32_t buffersize = sizeof(DROPFILES) + sizeof(char16_t);
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uint32_t alloclen = 0;
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char16_t* realbuffer;
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nsAutoString filename;
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hGlobalMemory = GlobalAlloc(GHND, buffersize);
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for (uint32_t i = 0; i < mDataObjects.Length(); ++i) {
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nsDataObj* dataObj = mDataObjects.ElementAt(i);
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hr = dataObj->GetData(&fe, &workingmedium);
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if (hr != S_OK) {
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switch (hr) {
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case DV_E_FORMATETC:
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continue;
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default:
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return hr;
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}
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}
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// Now we need to pull out the filename
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char16_t* buffer = (char16_t*)GlobalLock(workingmedium.hGlobal);
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if (buffer == nullptr)
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return E_FAIL;
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buffer += sizeof(DROPFILES)/sizeof(char16_t);
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filename = buffer;
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GlobalUnlock(workingmedium.hGlobal);
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ReleaseStgMedium(&workingmedium);
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// Now put the filename into our buffer
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alloclen = (filename.Length() + 1) * sizeof(char16_t);
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hGlobalMemory = ::GlobalReAlloc(hGlobalMemory, buffersize + alloclen, GHND);
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if (hGlobalMemory == nullptr)
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return E_FAIL;
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realbuffer = (char16_t*)((char*)GlobalLock(hGlobalMemory) + buffersize);
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if (!realbuffer)
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return E_FAIL;
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realbuffer--; // Overwrite the preceding null
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memcpy(realbuffer, filename.get(), alloclen);
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GlobalUnlock(hGlobalMemory);
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buffersize += alloclen;
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}
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// We get the last null (on the double null terminator) for free since we used
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// the zero memory flag when we allocated. All we need to do is fill the
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// DROPFILES structure
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DROPFILES* df = (DROPFILES*)GlobalLock(hGlobalMemory);
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if (!df)
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return E_FAIL;
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df->pFiles = sizeof(DROPFILES); //Offset to start of file name string
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df->fNC = 0;
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df->pt.x = 0;
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df->pt.y = 0;
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df->fWide = TRUE; // utf-16 chars
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GlobalUnlock(hGlobalMemory);
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// Finally fill out the STGMEDIUM struct
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pSTM->tymed = TYMED_HGLOBAL;
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pSTM->pUnkForRelease = nullptr; // Caller gets to free the data
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pSTM->hGlobal = hGlobalMemory;
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return S_OK;
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}
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HRESULT nsDataObjCollection::GetText(LPFORMATETC pFE, LPSTGMEDIUM pSTM)
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{
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STGMEDIUM workingmedium;
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FORMATETC fe = *pFE;
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HGLOBAL hGlobalMemory;
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HRESULT hr;
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uint32_t buffersize = 1;
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uint32_t alloclen = 0;
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hGlobalMemory = GlobalAlloc(GHND, buffersize);
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if (pFE->cfFormat == CF_TEXT) {
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nsAutoCString text;
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for (uint32_t i = 0; i < mDataObjects.Length(); ++i) {
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nsDataObj* dataObj = mDataObjects.ElementAt(i);
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hr = dataObj->GetData(&fe, &workingmedium);
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if (hr != S_OK) {
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switch (hr) {
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case DV_E_FORMATETC:
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continue;
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default:
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return hr;
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}
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}
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// Now we need to pull out the text
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char* buffer = (char*)GlobalLock(workingmedium.hGlobal);
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if (buffer == nullptr)
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return E_FAIL;
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text = buffer;
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GlobalUnlock(workingmedium.hGlobal);
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ReleaseStgMedium(&workingmedium);
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// Now put the text into our buffer
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alloclen = text.Length();
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hGlobalMemory = ::GlobalReAlloc(hGlobalMemory, buffersize + alloclen,
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GHND);
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if (hGlobalMemory == nullptr)
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return E_FAIL;
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buffer = ((char*)GlobalLock(hGlobalMemory) + buffersize);
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if (!buffer)
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return E_FAIL;
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buffer--; // Overwrite the preceding null
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memcpy(buffer, text.get(), alloclen);
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GlobalUnlock(hGlobalMemory);
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buffersize += alloclen;
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}
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pSTM->tymed = TYMED_HGLOBAL;
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pSTM->pUnkForRelease = nullptr; // Caller gets to free the data
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pSTM->hGlobal = hGlobalMemory;
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return S_OK;
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}
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if (pFE->cfFormat == CF_UNICODETEXT) {
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buffersize = sizeof(char16_t);
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nsAutoString text;
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for (uint32_t i = 0; i < mDataObjects.Length(); ++i) {
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nsDataObj* dataObj = mDataObjects.ElementAt(i);
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hr = dataObj->GetData(&fe, &workingmedium);
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if (hr != S_OK) {
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switch (hr) {
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case DV_E_FORMATETC:
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continue;
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default:
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return hr;
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}
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}
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// Now we need to pull out the text
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char16_t* buffer = (char16_t*)GlobalLock(workingmedium.hGlobal);
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if (buffer == nullptr)
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return E_FAIL;
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text = buffer;
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GlobalUnlock(workingmedium.hGlobal);
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ReleaseStgMedium(&workingmedium);
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// Now put the text into our buffer
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alloclen = text.Length() * sizeof(char16_t);
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hGlobalMemory = ::GlobalReAlloc(hGlobalMemory, buffersize + alloclen,
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GHND);
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if (hGlobalMemory == nullptr)
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return E_FAIL;
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buffer = (char16_t*)((char*)GlobalLock(hGlobalMemory) + buffersize);
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if (!buffer)
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return E_FAIL;
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buffer--; // Overwrite the preceding null
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memcpy(buffer, text.get(), alloclen);
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GlobalUnlock(hGlobalMemory);
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buffersize += alloclen;
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}
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pSTM->tymed = TYMED_HGLOBAL;
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pSTM->pUnkForRelease = nullptr; // Caller gets to free the data
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pSTM->hGlobal = hGlobalMemory;
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return S_OK;
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}
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return E_FAIL;
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}
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HRESULT nsDataObjCollection::GetFileDescriptors(LPFORMATETC pFE,
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LPSTGMEDIUM pSTM)
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{
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STGMEDIUM workingmedium;
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FORMATETC fe = *pFE;
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HGLOBAL hGlobalMemory;
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HRESULT hr;
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uint32_t buffersize = sizeof(UINT);
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uint32_t alloclen = sizeof(FILEDESCRIPTOR);
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hGlobalMemory = GlobalAlloc(GHND, buffersize);
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for (uint32_t i = 0; i < mDataObjects.Length(); ++i) {
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nsDataObj* dataObj = mDataObjects.ElementAt(i);
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hr = dataObj->GetData(&fe, &workingmedium);
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if (hr != S_OK) {
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switch (hr) {
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case DV_E_FORMATETC:
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continue;
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default:
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return hr;
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}
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}
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// Now we need to pull out the filedescriptor
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FILEDESCRIPTOR* buffer =
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(FILEDESCRIPTOR*)((char*)GlobalLock(workingmedium.hGlobal) + sizeof(UINT));
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if (buffer == nullptr)
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return E_FAIL;
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hGlobalMemory = ::GlobalReAlloc(hGlobalMemory, buffersize + alloclen, GHND);
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if (hGlobalMemory == nullptr)
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return E_FAIL;
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FILEGROUPDESCRIPTOR* realbuffer =
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(FILEGROUPDESCRIPTOR*)GlobalLock(hGlobalMemory);
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if (!realbuffer)
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return E_FAIL;
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FILEDESCRIPTOR* copyloc = (FILEDESCRIPTOR*)((char*)realbuffer + buffersize);
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memcpy(copyloc, buffer, alloclen);
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realbuffer->cItems++;
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GlobalUnlock(hGlobalMemory);
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GlobalUnlock(workingmedium.hGlobal);
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ReleaseStgMedium(&workingmedium);
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buffersize += alloclen;
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}
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pSTM->tymed = TYMED_HGLOBAL;
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pSTM->pUnkForRelease = nullptr; // Caller gets to free the data
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pSTM->hGlobal = hGlobalMemory;
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return S_OK;
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}
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HRESULT nsDataObjCollection::GetFileContents(LPFORMATETC pFE, LPSTGMEDIUM pSTM)
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{
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ULONG num = 0;
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ULONG numwanted = (pFE->lindex == -1) ? 0 : pFE->lindex;
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FORMATETC fEtc = *pFE;
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fEtc.lindex = -1; // We're lying to the data object so it thinks it's alone
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// The key for this data type is to figure out which data object the index
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// corresponds to and then just pass it along
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for (uint32_t i = 0; i < mDataObjects.Length(); ++i) {
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nsDataObj* dataObj = mDataObjects.ElementAt(i);
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if (dataObj->QueryGetData(&fEtc) != S_OK)
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continue;
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if (num == numwanted)
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return dataObj->GetData(pFE, pSTM);
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num++;
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}
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return DV_E_LINDEX;
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}
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HRESULT nsDataObjCollection::GetFirstSupporting(LPFORMATETC pFE,
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LPSTGMEDIUM pSTM)
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{
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// There is no way to pass more than one of this, so just find the first data
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// object that supports it and pass it along
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for (uint32_t i = 0; i < mDataObjects.Length(); ++i) {
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if (mDataObjects.ElementAt(i)->QueryGetData(pFE) == S_OK)
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return mDataObjects.ElementAt(i)->GetData(pFE, pSTM);
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}
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return DV_E_FORMATETC;
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}
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