From 99f458dafa10e96c671159b74f9cefa9b795ee34 Mon Sep 17 00:00:00 2001
From: Andrei Prykhodko
Date: Sat, 21 Jul 2018 12:14:03 +0300
Subject: GRAPHICS: MACMENU: added menu parser from Win32 PE executable

---
 graphics/macgui/macmenu.cpp | 55 +++++++++++++++++++++++++++++++++++++++++++++
 graphics/macgui/macmenu.h   |  2 ++
 2 files changed, 57 insertions(+)

diff --git a/graphics/macgui/macmenu.cpp b/graphics/macgui/macmenu.cpp
index 0228798e38..c52a421f81 100644
--- a/graphics/macgui/macmenu.cpp
+++ b/graphics/macgui/macmenu.cpp
@@ -56,6 +56,15 @@ enum {
 	kFontStyleExtended = 64
 };
 
+enum {
+	kGrayed = 1,
+	kInactive = 2,
+	kPopUp = 16,
+	kMenuBarBreak = 32,
+	kMenuBreak = 64,
+	kEndMenu = 128,
+};
+
 struct MacMenuSubItem {
 	Common::String text;
 	Common::U32String unicodeText;
@@ -162,6 +171,52 @@ Common::StringArray *MacMenu::readMenuFromResource(Common::SeekableReadStream *r
 	return result;
 }
 
+static Common::U32String readUnicodeString(Common::SeekableReadStream *stream) {
+	Common::Array<uint32> strData;
+	uint16 wchar;
+	while ((wchar = stream->readUint16LE()) != '\0') {
+		strData.push_back(wchar);
+	}
+	return strData.empty() ? Common::U32String() : Common::U32String(strData.data(), strData.size());
+}
+
+
+MacMenu *MacMenu::createMenuFromPEexe(Common::PEResources &exe, MacWindowManager *wm) {
+	Common::SeekableReadStream *menuData = exe.getResource(Common::kPEMenu, 128);
+	if (!menuData)
+		return nullptr;
+
+	menuData->readUint16LE(); // wVersion
+	menuData->readUint16LE(); // cbHeaderSize
+
+	MacMenu *menu = wm->addMenu();
+
+	int depth = 0;
+	int curMenuItemId = 0;
+	while (depth >= 0) {
+		uint16 flags = menuData->readUint16LE();
+		if (flags & kPopUp) {
+			if (depth == 0) {
+				menu->addMenuItem(readUnicodeString(menuData));
+			} else {
+				// TODO
+				// for now skip
+				readUnicodeString(menuData);
+			}
+			if (!(flags & kEndMenu)) {
+				depth++;
+			}
+		} else {
+			menuData->readUint16LE(); // menu id
+			menu->addMenuSubItem(curMenuItemId, readUnicodeString(menuData), 0);
+			if (flags & kEndMenu) {
+				depth--;
+			}
+		}
+	}
+	return menu;
+}
+
 void MacMenu::addStaticMenus(const MacMenuData *data) {
 	MacMenuItem *about = new MacMenuItem(_wm->_fontMan->hasBuiltInFonts() ? "\xa9" : "\xf0"); // (c) Symbol as the most resembling apple
 	_items.push_back(about);
diff --git a/graphics/macgui/macmenu.h b/graphics/macgui/macmenu.h
index b9d8e0125b..36cd06a2ff 100644
--- a/graphics/macgui/macmenu.h
+++ b/graphics/macgui/macmenu.h
@@ -24,6 +24,7 @@
 #define GRAPHICS_MACGUI_MACMENU_H
 
 #include "common/str-array.h"
+#include "common/winexe_pe.h"
 
 namespace Common {
 class U32String;
@@ -48,6 +49,7 @@ public:
 	~MacMenu();
 
 	static Common::StringArray *readMenuFromResource(Common::SeekableReadStream *res);
+	static MacMenu *createMenuFromPEexe(Common::PEResources &exe, MacWindowManager *wm);
 
 	void setCommandsCallback(void (*callback)(int, Common::String &, void *), void *data) { _ccallback = callback; _cdata = data; }
 	void setCommandsCallback(void (*callback)(int, Common::U32String &, void *), void *data) { _unicodeccallback = callback; _cdata = data; }
-- 
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