1 files changed, 229 insertions, 0 deletions
diff --git a/src/plugins/platforms/wasm/qwasmclipboard.cpp b/src/plugins/platforms/wasm/qwasmclipboard.cpp
new file mode 100644
index 0000000000..d4a1e4dd50
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+++ b/src/plugins/platforms/wasm/qwasmclipboard.cpp
@@ -0,0 +1,229 @@
+/****************************************************************************
+**
+** 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 <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 QByteArray g_clipboardArray;
+static QByteArray g_clipboardFormat;
+
+static val getClipboardData()
+{
+    return val(g_clipboardArray.constData());
+}
+
+static val getClipboardFormat()
+{
+    return val(g_clipboardFormat.constData());
+}
+
+static void pasteClipboardData(emscripten::val format, emscripten::val dataPtr)
+{
+    QString formatString = QString::fromStdString(format.as<std::string>());
+    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", std::string("text"));
+
+    const std::string data = clipdata.as<std::string>();
+    if (data.length() > 0) {
+        QString qstr = QString::fromStdString(data);
+        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_clipboardArray.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).toUtf8();
+        g_clipboardArray = mimeData->text().toUtf8();
+    } else if (mimeData->hasHtml()) {
+        g_clipboardFormat =mimeData->formats().at(0).toUtf8();
+        g_clipboardArray = mimeData->html().toUtf8();
+    }
+
+    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 canvas = val::global(canvasId.toUtf8().constData());
+    canvas.call<void>("addEventListener", std::string("cut"),
+                      val::module_property("qtClipboardCutTo"));
+    canvas.call<void>("addEventListener", std::string("copy"),
+                      val::module_property("qtClipboardCopyTo"));
+    canvas.call<void>("addEventListener", std::string("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.as<std::string>());
+    }
+}