本文整理汇总了C++中HTMLInputElement::MozSetDndFilesAndDirectories方法的典型用法代码示例。如果您正苦于以下问题：C++ HTMLInputElement::MozSetDndFilesAndDirectories方法的具体用法？C++ HTMLInputElement::MozSetDndFilesAndDirectories怎么用？C++ HTMLInputElement::MozSetDndFilesAndDirectories使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类HTMLInputElement的用法示例。
在下文中一共展示了HTMLInputElement::MozSetDndFilesAndDirectories方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: GetBlobImplForWebkitDirectory
/**
* This is called when we receive a drop or a dragover.
*/
NS_IMETHODIMP
nsFileControlFrame::DnDListener::HandleEvent(nsIDOMEvent* aEvent)
{
NS_ASSERTION(mFrame, "We should have been unregistered");
bool defaultPrevented = false;
aEvent->GetDefaultPrevented(&defaultPrevented);
if (defaultPrevented) {
return NS_OK;
}
nsCOMPtr<nsIDOMDragEvent> dragEvent = do_QueryInterface(aEvent);
if (!dragEvent) {
return NS_OK;
}
nsCOMPtr<nsIDOMDataTransfer> dataTransfer;
dragEvent->GetDataTransfer(getter_AddRefs(dataTransfer));
if (!IsValidDropData(dataTransfer)) {
return NS_OK;
}
nsCOMPtr<nsIContent> content = mFrame->GetContent();
bool supportsMultiple = content && content->HasAttr(kNameSpaceID_None, nsGkAtoms::multiple);
if (!CanDropTheseFiles(dataTransfer, supportsMultiple)) {
dataTransfer->SetDropEffect(NS_LITERAL_STRING("none"));
aEvent->StopPropagation();
return NS_OK;
}
nsAutoString eventType;
aEvent->GetType(eventType);
if (eventType.EqualsLiteral("dragover")) {
// Prevent default if we can accept this drag data
aEvent->PreventDefault();
return NS_OK;
}
if (eventType.EqualsLiteral("drop")) {
aEvent->StopPropagation();
aEvent->PreventDefault();
NS_ASSERTION(content, "The frame has no content???");
HTMLInputElement* inputElement = HTMLInputElement::FromContent(content);
NS_ASSERTION(inputElement, "No input element for this file upload control frame!");
nsCOMPtr<nsIDOMFileList> fileList;
dataTransfer->GetFiles(getter_AddRefs(fileList));
RefPtr<BlobImpl> webkitDir;
nsresult rv =
GetBlobImplForWebkitDirectory(fileList, getter_AddRefs(webkitDir));
NS_ENSURE_SUCCESS(rv, NS_OK);
nsTArray<OwningFileOrDirectory> array;
if (webkitDir) {
AppendBlobImplAsDirectory(array, webkitDir, content);
inputElement->MozSetDndFilesAndDirectories(array);
} else {
bool blinkFileSystemEnabled =
Preferences::GetBool("dom.webkitBlink.filesystem.enabled", false);
if (blinkFileSystemEnabled) {
FileList* files = static_cast<FileList*>(fileList.get());
if (files) {
for (uint32_t i = 0; i < files->Length(); ++i) {
File* file = files->Item(i);
if (file) {
if (file->Impl() && file->Impl()->IsDirectory()) {
AppendBlobImplAsDirectory(array, file->Impl(), content);
} else {
OwningFileOrDirectory* element = array.AppendElement();
element->SetAsFile() = file;
}
}
}
}
}
// This is rather ugly. Pass the directories as Files using SetFiles,
// but then if blink filesystem API is enabled, it wants
// FileOrDirectory array.
inputElement->SetFiles(fileList, true);
if (blinkFileSystemEnabled) {
inputElement->UpdateEntries(array);
}
nsContentUtils::DispatchTrustedEvent(content->OwnerDoc(), content,
NS_LITERAL_STRING("input"), true,
false);
nsContentUtils::DispatchTrustedEvent(content->OwnerDoc(), content,
NS_LITERAL_STRING("change"), true,
false);
}
}
return NS_OK;
//.........这里部分代码省略.........