Spreadsheet: Add support for multiple sheets

This also refactors the js integration stuff to allow sheets to
reference each other safely.

Applications/Spreadsheet/JSIntegration.h

@@ -0,0 +1,71 @@
+/*
+ * Copyright (c) 2020, the SerenityOS developers.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#pragma once
+
+#include <LibJS/Forward.h>
+#include <LibJS/Runtime/GlobalObject.h>
+
+namespace Spreadsheet {
+
+class Sheet;
+class Workbook;
+
+class SheetGlobalObject : public JS::GlobalObject {
+    JS_OBJECT(SheetGlobalObject, JS::GlobalObject);
+
+public:
+    SheetGlobalObject(Sheet& sheet);
+
+    virtual ~SheetGlobalObject() override;
+
+    virtual JS::Value get(const JS::PropertyName& name, JS::Value receiver = {}) const override;
+    virtual bool put(const JS::PropertyName& name, JS::Value value, JS::Value receiver = {}) override;
+    virtual void initialize() override;
+
+    JS_DECLARE_NATIVE_FUNCTION(parse_cell_name);
+
+private:
+    Sheet& m_sheet;
+};
+
+class WorkbookObject : public JS::Object {
+    JS_OBJECT(WorkbookObject, JS::Object);
+
+public:
+    WorkbookObject(Workbook& workbook);
+
+    virtual ~WorkbookObject() override;
+
+    virtual void initialize(JS::GlobalObject&) override;
+
+    JS_DECLARE_NATIVE_FUNCTION(sheet);
+
+private:
+    Workbook& m_workbook;
+};
+
+}