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// Copyright (C) 2021 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#ifndef QSTDWEB_P_H
#define QSTDWEB_P_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists purely as an
// implementation detail. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
#include <private/qglobal_p.h>
#include <emscripten/val.h>
#include <cstdint>
#include <functional>
#include "initializer_list"
#include <QtCore/qglobal.h>
#include "QtCore/qhash.h"
QT_BEGIN_NAMESPACE
namespace qstdweb {
extern const char makeContextfulPromiseFunctionName[];
// DOM API in C++, implemented using emscripten val.h and bind.h.
// This is private API and can be extended and changed as needed.
// The API mirrors that of the native API, with some extensions
// to ease usage from C++ code.
class ArrayBuffer;
class Blob;
class File;
class FileList;
class FileReader;
class Uint8Array;
class EventCallback;
class Q_CORE_EXPORT ArrayBuffer {
public:
explicit ArrayBuffer(uint32_t size);
explicit ArrayBuffer(const emscripten::val &arrayBuffer);
uint32_t byteLength() const;
emscripten::val val();
private:
friend class Uint8Array;
emscripten::val m_arrayBuffer = emscripten::val::undefined();
};
class Q_CORE_EXPORT Blob {
public:
explicit Blob(const emscripten::val &blob);
uint32_t size() const;
static Blob copyFrom(const char *buffer, uint32_t size);
emscripten::val val();
std::string type() const;
private:
friend class FileReader;
emscripten::val m_blob = emscripten::val::undefined();
};
class Q_CORE_EXPORT File {
public:
File() = default;
explicit File(const emscripten::val &file);
Blob slice(uint64_t begin, uint64_t end) const;
std::string name() const;
uint64_t size() const;
std::string type() const;
void stream(uint32_t offset, uint32_t length, char *buffer, const std::function<void ()> &completed) const;
void stream(char *buffer, const std::function<void ()> &completed) const;
emscripten::val val();
private:
emscripten::val m_file = emscripten::val::undefined();
};
class Q_CORE_EXPORT FileList {
public:
FileList() = default;
explicit FileList(const emscripten::val &fileList);
int length() const;
File item(int index) const;
File operator[](int index) const;
emscripten::val val();
private:
emscripten::val m_fileList = emscripten::val::undefined();
};
class Q_CORE_EXPORT FileReader {
public:
ArrayBuffer result() const;
void readAsArrayBuffer(const Blob &blob) const;
void onLoad(const std::function<void(emscripten::val)> &onLoad);
void onError(const std::function<void(emscripten::val)> &onError);
void onAbort(const std::function<void(emscripten::val)> &onAbort);
emscripten::val val();
private:
emscripten::val m_fileReader = emscripten::val::global("FileReader").new_();
std::unique_ptr<EventCallback> m_onLoad;
std::unique_ptr<EventCallback> m_onError;
std::unique_ptr<EventCallback> m_onAbort;
};
class Q_CORE_EXPORT Uint8Array {
public:
static Uint8Array heap();
explicit Uint8Array(const emscripten::val &uint8Array);
explicit Uint8Array(const ArrayBuffer &buffer);
explicit Uint8Array(uint32_t size);
Uint8Array(const ArrayBuffer &buffer, uint32_t offset, uint32_t length);
Uint8Array(const char *buffer, uint32_t size);
ArrayBuffer buffer() const;
uint32_t length() const;
void set(const Uint8Array &source);
void copyTo(char *destination) const;
static void copy(char *destination, const Uint8Array &source);
static Uint8Array copyFrom(const char *buffer, uint32_t size);
emscripten::val val();
private:
static emscripten::val heap_();
static emscripten::val constructor_();
emscripten::val m_uint8Array = emscripten::val::undefined();
};
class Q_CORE_EXPORT EventCallback
{
public:
EventCallback() = default;
~EventCallback();
EventCallback(EventCallback const&) = delete;
EventCallback& operator=(EventCallback const&) = delete;
EventCallback(emscripten::val element, const std::string &name,
const std::function<void(emscripten::val)> &fn);
static void activate(emscripten::val event);
private:
static std::string contextPropertyName(const std::string &eventName);
emscripten::val m_element = emscripten::val::undefined();
std::string m_eventName;
std::function<void(emscripten::val)> m_fn;
};
struct PromiseCallbacks
{
std::function<void(emscripten::val)> thenFunc;
std::function<void(emscripten::val)> catchFunc;
std::function<void()> finallyFunc;
};
namespace Promise {
void adoptPromise(emscripten::val promise, PromiseCallbacks callbacks);
template<typename... Args>
void make(emscripten::val target,
QString methodName,
PromiseCallbacks callbacks,
Args... args)
{
emscripten::val promiseObject = target.call<emscripten::val>(
methodName.toStdString().c_str(), std::forward<Args>(args)...);
if (promiseObject.isUndefined() || promiseObject["constructor"]["name"].as<std::string>() != "Promise") {
qFatal("This function did not return a promise");
}
adoptPromise(std::move(promiseObject), std::move(callbacks));
}
void all(std::vector<emscripten::val> promises, PromiseCallbacks callbacks);
};
}
QT_END_NAMESPACE
#endif
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