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/****************************************************************************
**
** Copyright (C) 2018 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the plugins of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:GPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 or (at your option) any later version
** approved by the KDE Free Qt Foundation. The licenses are as published by
** the Free Software Foundation and appearing in the file LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qwasmclipboard.h"
#include "qwasmwindow.h"
#include "qwasmstring.h"
#include <emscripten.h>
#include <emscripten/html5.h>
#include <emscripten/bind.h>
#include <QCoreApplication>
#include <qpa/qwindowsysteminterface.h>
using namespace emscripten;
// there has got to be a better way...
static QString g_clipboardText;
static QString g_clipboardFormat;
static val getClipboardData()
{
return QWasmString::fromQString(g_clipboardText);
}
static val getClipboardFormat()
{
return QWasmString::fromQString(g_clipboardFormat);
}
static void pasteClipboardData(emscripten::val format, emscripten::val dataPtr)
{
QString formatString = QWasmString::toQString(format);
QByteArray dataArray = QByteArray::fromStdString(dataPtr.as<std::string>());
QMimeData *mMimeData = new QMimeData;
mMimeData->setData(formatString, dataArray);
QWasmClipboard::qWasmClipboardPaste(mMimeData);
}
static void qClipboardPromiseResolve(emscripten::val something)
{
pasteClipboardData(emscripten::val("text/plain"), something);
}
static void qClipboardCutTo(val event)
{
if (!QWasmIntegration::get()->getWasmClipboard()->hasClipboardApi) {
// Send synthetic Ctrl+X to make the app cut data to Qt's clipboard
QWindowSystemInterface::handleKeyEvent<QWindowSystemInterface::SynchronousDelivery>(
0, QEvent::KeyPress, Qt::Key_X, Qt::ControlModifier, "X");
}
val module = val::global("Module");
val clipdata = module.call<val>("qtGetClipboardData");
val clipFormat = module.call<val>("qtGetClipboardFormat");
event["clipboardData"].call<void>("setData", clipFormat, clipdata);
event.call<void>("preventDefault");
}
static void qClipboardCopyTo(val event)
{
if (!QWasmIntegration::get()->getWasmClipboard()->hasClipboardApi) {
// Send synthetic Ctrl+C to make the app copy data to Qt's clipboard
QWindowSystemInterface::handleKeyEvent<QWindowSystemInterface::SynchronousDelivery>(
0, QEvent::KeyPress, Qt::Key_C, Qt::ControlModifier, "C");
}
val module = val::global("Module");
val clipdata = module.call<val>("qtGetClipboardData");
val clipFormat = module.call<val>("qtGetClipboardFormat");
event["clipboardData"].call<void>("setData", clipFormat, clipdata);
event.call<void>("preventDefault");
}
static void qClipboardPasteTo(val event)
{
bool hasClipboardApi = QWasmIntegration::get()->getWasmClipboard()->hasClipboardApi;
val clipdata = hasClipboardApi ?
val::global("Module").call<val>("qtGetClipboardData") :
event["clipboardData"].call<val>("getData", val("text"));
const QString qstr = QWasmString::toQString(clipdata);
if (qstr.length() > 0) {
QMimeData *mMimeData = new QMimeData;
mMimeData->setText(qstr);
QWasmClipboard::qWasmClipboardPaste(mMimeData);
}
}
EMSCRIPTEN_BINDINGS(qtClipboardModule) {
function("qtGetClipboardData", &getClipboardData);
function("qtGetClipboardFormat", &getClipboardFormat);
function("qtPasteClipboardData", &pasteClipboardData);
function("qtClipboardPromiseResolve", &qClipboardPromiseResolve);
function("qtClipboardCutTo", &qClipboardCutTo);
function("qtClipboardCopyTo", &qClipboardCopyTo);
function("qtClipboardPasteTo", &qClipboardPasteTo);
}
QWasmClipboard::QWasmClipboard()
{
val clipboard = val::global("navigator")["clipboard"];
hasClipboardApi = (!clipboard.isUndefined() && !clipboard["readText"].isUndefined());
initClipboardEvents();
}
QWasmClipboard::~QWasmClipboard()
{
g_clipboardText.clear();
g_clipboardFormat.clear();
}
QMimeData* QWasmClipboard::mimeData(QClipboard::Mode mode)
{
if (mode != QClipboard::Clipboard)
return nullptr;
return QPlatformClipboard::mimeData(mode);
}
void QWasmClipboard::setMimeData(QMimeData* mimeData, QClipboard::Mode mode)
{
if (mimeData->hasText()) {
g_clipboardFormat = mimeData->formats().at(0);
g_clipboardText = mimeData->text();
} else if (mimeData->hasHtml()) {
g_clipboardFormat = mimeData->formats().at(0);
g_clipboardText = mimeData->html();
}
QPlatformClipboard::setMimeData(mimeData, mode);
}
bool QWasmClipboard::supportsMode(QClipboard::Mode mode) const
{
return mode == QClipboard::Clipboard;
}
bool QWasmClipboard::ownsMode(QClipboard::Mode mode) const
{
Q_UNUSED(mode);
return false;
}
void QWasmClipboard::qWasmClipboardPaste(QMimeData *mData)
{
QWasmIntegration::get()->clipboard()->setMimeData(mData, QClipboard::Clipboard);
QWindowSystemInterface::handleKeyEvent<QWindowSystemInterface::SynchronousDelivery>(
0, QEvent::KeyPress, Qt::Key_V, Qt::ControlModifier, "V");
}
void QWasmClipboard::initClipboardEvents()
{
if (!hasClipboardApi)
return;
val permissions = val::global("navigator")["permissions"];
val readPermissionsMap = val::object();
readPermissionsMap.set("name", val("clipboard-read"));
permissions.call<val>("query", readPermissionsMap);
val writePermissionsMap = val::object();
writePermissionsMap.set("name", val("clipboard-write"));
permissions.call<val>("query", writePermissionsMap);
}
void QWasmClipboard::installEventHandlers(const QString &canvasId)
{
if (hasClipboardApi)
return;
// Fallback path for browsers which do not support direct clipboard access
val document = val::global("document");
val canvas = document.call<val>("getElementById", QWasmString::fromQString(canvasId));
canvas.call<void>("addEventListener", val("cut"),
val::module_property("qtClipboardCutTo"));
canvas.call<void>("addEventListener", val("copy"),
val::module_property("qtClipboardCopyTo"));
canvas.call<void>("addEventListener", val("paste"),
val::module_property("qtClipboardPasteTo"));
}
void QWasmClipboard::readTextFromClipboard()
{
if (QWasmIntegration::get()->getWasmClipboard()->hasClipboardApi) {
val navigator = val::global("navigator");
val textPromise = navigator["clipboard"].call<val>("readText");
val readTextResolve = val::global("Module")["qtClipboardPromiseResolve"];
textPromise.call<val>("then", readTextResolve);
}
}
void QWasmClipboard::writeTextToClipboard()
{
if (QWasmIntegration::get()->getWasmClipboard()->hasClipboardApi) {
val module = val::global("Module");
val txt = module.call<val>("qtGetClipboardData");
val format = module.call<val>("qtGetClipboardFormat");
val navigator = val::global("navigator");
navigator["clipboard"].call<void>("writeText", txt);
}
}
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