loadopts.c

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/*
 * Copyright 2006 Jacek Caban for CodeWeavers
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
 */
 
#include "mshtml_private.h"
 
typedef struct load_opt {
    DWORD option;
    PVOID buffer;
    DWORD size;
 
    struct load_opt *next;
} load_opt;
 
typedef struct {
    IHtmlLoadOptions IHtmlLoadOptions_iface;
 
    LONG ref;
 
    load_opt *opts;
} HTMLLoadOptions;
 
static inline HTMLLoadOptions *impl_from_IHtmlLoadOptions(IHtmlLoadOptions *iface)
{
    return CONTAINING_RECORD(iface, HTMLLoadOptions, IHtmlLoadOptions_iface);
}
 
static HRESULT WINAPI HtmlLoadOptions_QueryInterface(IHtmlLoadOptions *iface,
        REFIID riid, void **ppv)
{
    HTMLLoadOptions *This = impl_from_IHtmlLoadOptions(iface);
 
    TRACE("(%p)->(%s %p)\n", This, debugstr_mshtml_guid(riid), ppv);
 
    if(IsEqualGUID(&IID_IUnknown, riid)) {
        *ppv = &This->IHtmlLoadOptions_iface;
    }else if(IsEqualGUID(&IID_IOptionArray, riid)) {
        *ppv = &This->IHtmlLoadOptions_iface;
    }else if(IsEqualGUID(&IID_IHtmlLoadOptions, riid)) {
        *ppv = &This->IHtmlLoadOptions_iface;
    }else {
        *ppv = NULL;
        WARN("(%p)->(%s %p)\n", This, debugstr_mshtml_guid(riid), ppv);
        return E_NOINTERFACE;
    }
 
    IUnknown_AddRef((IUnknown*)*ppv);
    return S_OK;
}
 
static ULONG WINAPI HtmlLoadOptions_AddRef(IHtmlLoadOptions *iface)
{
    HTMLLoadOptions *This = impl_from_IHtmlLoadOptions(iface);
    LONG ref = InterlockedIncrement(&This->ref);
 
    TRACE("(%p) ref=%d\n", This, ref);
 
    return ref;
}
 
static ULONG WINAPI HtmlLoadOptions_Release(IHtmlLoadOptions *iface)
{
    HTMLLoadOptions *This = impl_from_IHtmlLoadOptions(iface);
    LONG ref = InterlockedDecrement(&This->ref);
 
    TRACE("(%p) ref=%d\n", This, ref);
 
    if(!ref) {
        load_opt *iter = This->opts, *last;
 
        while(iter) {
            last = iter;
            iter = iter->next;
 
            heap_free(last->buffer);
            heap_free(last);
        }
 
        heap_free(This);
    }
 
    return ref;
}
 
static HRESULT WINAPI HtmlLoadOptions_QueryOption(IHtmlLoadOptions *iface, DWORD dwOption,
        LPVOID pBuffer, ULONG *pcbBuf)
{
    HTMLLoadOptions *This = impl_from_IHtmlLoadOptions(iface);
    load_opt *iter;
 
    TRACE("(%p)->(%d %p %p)\n", This, dwOption, pBuffer, pcbBuf);
 
    for(iter = This->opts; iter; iter = iter->next) {
        if(iter->option == dwOption)
            break;
    }
 
    if(!iter) {
        *pcbBuf = 0;
        return S_OK;
    }
 
    if(*pcbBuf < iter->size) {
        *pcbBuf = iter->size;
        return E_FAIL;
    }
 
    memcpy(pBuffer, iter->buffer, iter->size);
    *pcbBuf = iter->size;
 
    return S_OK;
}
 
static HRESULT WINAPI HtmlLoadOptions_SetOption(IHtmlLoadOptions *iface, DWORD dwOption,
        LPVOID pBuffer, ULONG cbBuf)
{
    HTMLLoadOptions *This = impl_from_IHtmlLoadOptions(iface);
    load_opt *iter = NULL;
 
    TRACE("(%p)->(%d %p %d)\n", This, dwOption, pBuffer, cbBuf);
 
    for(iter = This->opts; iter; iter = iter->next) {
        if(iter->option == dwOption)
            break;
    }
 
    if(!iter) {
        iter = heap_alloc(sizeof(load_opt));
        iter->next = This->opts;
        This->opts = iter;
 
        iter->option = dwOption;
    }else {
        heap_free(iter->buffer);
    }
 
    if(!cbBuf) {
        iter->buffer = NULL;
        iter->size = 0;
 
        return S_OK;
    }
 
    iter->size = cbBuf;
    iter->buffer = heap_alloc(cbBuf);
    memcpy(iter->buffer, pBuffer, iter->size);
 
    return S_OK;
}
 
static const IHtmlLoadOptionsVtbl HtmlLoadOptionsVtbl = {
    HtmlLoadOptions_QueryInterface,
    HtmlLoadOptions_AddRef,
    HtmlLoadOptions_Release,
    HtmlLoadOptions_QueryOption,
    HtmlLoadOptions_SetOption
};
 
HRESULT HTMLLoadOptions_Create(IUnknown *pUnkOuter, REFIID riid, void** ppv)
{
    HTMLLoadOptions *ret;
    HRESULT hres;
 
    TRACE("(%p %s %p)\n", pUnkOuter, debugstr_mshtml_guid(riid), ppv);
 
    ret = heap_alloc(sizeof(HTMLLoadOptions));
    if(!ret)
        return E_OUTOFMEMORY;
 
    ret->IHtmlLoadOptions_iface.lpVtbl = &HtmlLoadOptionsVtbl;
    ret->ref = 1;
    ret->opts = NULL;
 
    hres = IHtmlLoadOptions_QueryInterface(&ret->IHtmlLoadOptions_iface, riid, ppv);
    IHtmlLoadOptions_Release(&ret->IHtmlLoadOptions_iface);
    return hres;
}