From 29c0377f07f4942f9957ea87d59c252148dc9e5b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Morten=20Johan=20S=C3=B8rvig?= <morten.sorvig@qt.io>
Date: Fri, 1 Jun 2018 15:13:30 +0200
Subject: WebAssembly for QtBase
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This is the squashed diff from wip/webassembly to dev.

Done-with: Peng Wu <peng.wu@intopalo.com>
Done-with: Sami Enne <sami.enne@intopalo.com>
Done-with: Morten Johan Sørvig <morten.sorvig@qt.io>
Started-by: Andrew Knight <andrew.knight@intopalo.com>
Change-Id: I6562433c0a38d6ec49ab675e0f104f2665f3392d
Reviewed-by: Lorn Potter <lorn.potter@gmail.com>
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@qt.io>
---
 src/plugins/platforms/wasm/qwasmcursor.cpp | 131 +++++++++++++++++++++++++++++
 1 file changed, 131 insertions(+)
 create mode 100644 src/plugins/platforms/wasm/qwasmcursor.cpp

(limited to 'src/plugins/platforms/wasm/qwasmcursor.cpp')

diff --git a/src/plugins/platforms/wasm/qwasmcursor.cpp b/src/plugins/platforms/wasm/qwasmcursor.cpp
new file mode 100644
index 0000000000..54804a55b3
--- /dev/null
+++ b/src/plugins/platforms/wasm/qwasmcursor.cpp
@@ -0,0 +1,131 @@
+/****************************************************************************
+**
+** 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 "qwasmcursor.h"
+
+#include <QtCore/qdebug.h>
+
+#include <emscripten/emscripten.h>
+
+void QWasmCursor::changeCursor(QCursor *windowCursor, QWindow *window)
+{
+    if (windowCursor == nullptr)
+        return;
+
+    // FIXME: The HTML5 plugin sets the cursor on the native canvas; when using multiple windows
+    // multiple cursors need to be managed taking mouse postion and stacking into account.
+    Q_UNUSED(window);
+
+    // Bitmap and custom cursors are not implemented (will fall back to "auto")
+    if (windowCursor->shape() == Qt::BitmapCursor || windowCursor->shape() >= Qt::CustomCursor)
+        qWarning() << "QWasmCursor: bitmap and custom cursors are not supported";
+
+    QByteArray htmlCursorName = cursorShapeToHtml(windowCursor->shape());
+
+    if (htmlCursorName.isEmpty())
+        htmlCursorName = "auto";
+
+    // Set cursor on the main canvas
+    EM_ASM_ARGS({
+        if (Module['canvas']) {
+            Module['canvas'].style['cursor'] = Pointer_stringify($0);
+        }
+    }, htmlCursorName.constData());
+}
+
+QByteArray QWasmCursor::cursorShapeToHtml(Qt::CursorShape shape)
+{
+    QByteArray cursorName;
+
+    switch (shape) {
+    case Qt::ArrowCursor:
+        cursorName = "default";
+        break;
+    case Qt::UpArrowCursor:
+        break;
+    case Qt::CrossCursor:
+        cursorName = "crosshair";
+        break;
+    case Qt::WaitCursor:
+        cursorName = "wait";
+        break;
+    case Qt::IBeamCursor:
+        cursorName = "text";
+        break;
+    case Qt::SizeVerCursor:
+        cursorName = "ns-resize";
+        break;
+    case Qt::SizeHorCursor:
+        cursorName = "ew-resize";
+        break;
+    case Qt::SizeBDiagCursor:
+        cursorName = "nesw-resize";
+        break;
+    case Qt::SizeFDiagCursor:
+        cursorName = "nwse-resize";
+        break;
+    case Qt::SizeAllCursor:
+        break; // no equivalent?
+    case Qt::BlankCursor:
+        cursorName = "none";
+        break;
+    case Qt::SplitVCursor:
+        cursorName = "row-resize";
+        break;
+    case Qt::SplitHCursor:
+        cursorName = "col-resize";
+        break;
+    case Qt::PointingHandCursor:
+        cursorName = "pointer";
+        break;
+    case Qt::ForbiddenCursor:
+        cursorName = "not-allowed";
+        break;
+    case Qt::WhatsThisCursor:
+        cursorName = "help";
+        break;
+    case Qt::BusyCursor:
+        cursorName = "wait";
+        break;
+    case Qt::OpenHandCursor:
+        break; // no equivalent?
+    case Qt::ClosedHandCursor:
+        break; // no equivalent?
+    case Qt::DragCopyCursor:
+        break; // no equivalent?
+    case Qt::DragMoveCursor:
+        break; // no equivalent?
+    case Qt::DragLinkCursor:
+        break; // no equivalent?
+    default:
+        break;
+    }
+
+    return cursorName;
+}
-- 
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