* Icon-O-Matic prepends a magic number when writing native files, this way

we can associate these native files with Icon-O-Matic (they also get their
  own mime type)


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21295 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/apps/icon-o-matic/IconEditorApp.cpp

@@ -18,6 +18,8 @@
 #include <File.h>
 #include <FilePanel.h>
 #include <IconEditorProtocol.h>
+#include <Message.h>
+#include <Mime.h>
 
 #include "support_settings.h"
 
@@ -26,6 +28,7 @@
 #include "BitmapExporter.h"
 #include "BitmapSetSaver.h"
 #include "CommandStack.h"
+#include "Defines.h"
 #include "Document.h"
 #include "FlatIconExporter.h"
 #include "FlatIconFormat.h"
@@ -46,9 +49,11 @@
 
 using std::nothrow;
 
+static const char* kAppSig = "application/x-vnd.haiku-icon_o_matic";
+
 // constructor
 IconEditorApp::IconEditorApp()
-	: BApplication("application/x-vnd.haiku-icon_o_matic"),
+	: BApplication(kAppSig),
 	  fMainWindow(NULL),
 	  fDocument(new Document("test")),
 
@@ -227,6 +232,8 @@ IconEditorApp::ReadyToRun()
 	_RestoreSettings();
 
 	fMainWindow->Show();
+
+	_InstallDocumentMimeType();
 }
 
 // RefsReceived
@@ -571,3 +578,80 @@ IconEditorApp::_RestoreSettings()
 	fMainWindow->RestoreSettings(&settings);
 }
 
+// _InstallDocumentMimeType
+void
+IconEditorApp::_InstallDocumentMimeType()
+{
+	// install mime type of documents
+	BMimeType mime(kNativeIconMimeType);
+	status_t ret = mime.InitCheck();
+	if (ret < B_OK) {
+		fprintf(stderr, "Could not init native document mime type (%s): %s.\n",
+			kNativeIconMimeType, strerror(ret));
+		return;
+	}
+
+	if (mime.IsInstalled() && !(modifiers() & B_SHIFT_KEY)) {
+		// mime is already installed, and the user is not
+		// pressing the shift key to force a re-install
+		return;
+	}
+
+	ret = mime.Install();
+	if (ret < B_OK) {
+		fprintf(stderr, "Could not install native document mime type (%s): %s.\n",
+			kNativeIconMimeType, strerror(ret));
+		return;
+	}
+	// set preferred app
+	ret = mime.SetPreferredApp(kAppSig);
+	if (ret < B_OK)
+		fprintf(stderr, "Could not set native document preferred app: %s\n",
+			strerror(ret));
+
+	// set descriptions
+	ret = mime.SetShortDescription("Haiku Icon");
+	if (ret < B_OK)
+		fprintf(stderr, "Could not set short description of mime type: %s\n",
+			strerror(ret));
+	ret = mime.SetLongDescription("Native Haiku vector icon");
+	if (ret < B_OK)
+		fprintf(stderr, "Could not set long description of mime type: %s\n",
+			strerror(ret));
+
+	// set extensions
+	BMessage message('extn');
+	message.AddString("extensions", "icon");
+	ret = mime.SetFileExtensions(&message);
+	if (ret < B_OK)
+		fprintf(stderr, "Could not set extensions of mime type: %s\n",
+			strerror(ret));
+
+	// set sniffer rule
+	const char* snifferRule = "0.9 ('GSMI')";
+	ret = mime.SetSnifferRule(snifferRule);
+	if (ret < B_OK) {
+		BString parseError;
+		BMimeType::CheckSnifferRule(snifferRule, &parseError);
+		fprintf(stderr, "Could not set sniffer rule of mime type: %s\n",
+			parseError.String());
+	}
+
+// NOTE: Icon-O-Matic writes the icon being saved as icon of the file anyways
+// therefor, the following code is not needed, it is also not tested and I am
+// spotting an error with SetIcon()
+//	// set document icon
+//	BResources* resources = AppResources();
+//		// does not need to be freed (belongs to BApplication base)
+//	if (resources) {
+//		size_t size;
+//		const void* iconData = resources->LoadResource('VICN', "IOM:DOC_ICON", &size);
+//		if (iconData && size > 0) {
+//			memcpy(largeIcon.Bits(), iconData, size);
+//			if (mime.SetIcon(&largeIcon, B_LARGE_ICON) < B_OK)
+//				fprintf(stderr, "Could not set large icon of mime type.\n");
+//		} else
+//			fprintf(stderr, "Could not find icon in app resources (data: %p, size: %ld).\n", iconData, size);
+//	} else
+//		fprintf(stderr, "Could not find app resources.\n");
+}

src/apps/icon-o-matic/IconEditorApp.h

@@ -78,6 +78,7 @@ class IconEditorApp : public BApplication {
 
 			void				_StoreSettings();
 			void				_RestoreSettings();
+			void				_InstallDocumentMimeType();
 
 			MainWindow*			fMainWindow;
 			Document*			fDocument;

src/apps/icon-o-matic/Jamfile

@@ -106,6 +106,7 @@ Application Icon-O-Matic :
 	########  Icon-O-Matic  ########
 
 	# document
+	Defines.cpp
 	Document.cpp
 	IconObject.cpp
 	SetPropertiesCommand.cpp

src/apps/icon-o-matic/document/Defines.cpp

@@ -0,0 +1,13 @@
+/*
+ * Copyright 2007, Haiku. All rights reserved.
+ * Distributed under the terms of the MIT License.
+ *
+ * Authors:
+ *		Stephan Aßmus <superstippi@gmx.de>
+ */
+#include "Defines.h"
+
+const uint32 kNativeIconMagicNumber = 'GSMI';
+const char*	kNativeIconMimeType	= "application/x-vnd.Haiku-icon";
+
+

src/apps/icon-o-matic/document/Defines.h

@@ -0,0 +1,14 @@
+/*
+ * Copyright 2007, Haiku. All rights reserved.
+ * Distributed under the terms of the MIT License.
+ *
+ * Authors:
+ *		Stephan Aßmus <superstippi@gmx.de>
+ */
+#ifndef DEFINES_H
+#define DEFINES_H
+
+extern const uint32 kNativeIconMagicNumber;
+extern const char*	kNativeIconMimeType;
+
+#endif // DEFINES_H

src/apps/icon-o-matic/document/savers/NativeSaver.cpp

@@ -5,7 +5,6 @@
  * Authors:
  *		Stephan Aßmus <superstippi@gmx.de>
  */
-
 #include "NativeSaver.h"
 
 #include "FlatIconFormat.h"

src/apps/icon-o-matic/document/savers/NativeSaver.h

@@ -5,7 +5,6 @@
  * Authors:
  *		Stephan Aßmus <superstippi@gmx.de>
  */
-
 #ifndef NATIVE_SAVER_H
 #define NATIVE_SAVER_H
 

src/apps/icon-o-matic/document/savers/SimpleFileSaver.cpp

@@ -1,11 +1,10 @@
 /*
- * Copyright 2006, Haiku. All rights reserved.
+ * Copyright 2006-2007, Haiku. All rights reserved.
  * Distributed under the terms of the MIT License.
  *
  * Authors:
  *		Stephan Aßmus <superstippi@gmx.de>
  */
-
 #include "SimpleFileSaver.h"
 
 #include "Exporter.h"

src/apps/icon-o-matic/document/savers/SimpleFileSaver.h

@@ -1,11 +1,10 @@
 /*
- * Copyright 2006, Haiku. All rights reserved.
+ * Copyright 2006-2007, Haiku. All rights reserved.
  * Distributed under the terms of the MIT License.
  *
  * Authors:
  *		Stephan Aßmus <superstippi@gmx.de>
  */
-
 #ifndef SIMPLE_FILE_SAVER_H
 #define SIMPLE_FILE_SAVER_H
 

src/apps/icon-o-matic/import_export/message/MessageExporter.cpp

@@ -8,10 +8,12 @@
 
 #include "MessageExporter.h"
 
+#include <ByteOrder.h>
 #include <DataIO.h>
 #include <Message.h>
 #include <TypeConstants.h>
 
+#include "Defines.h"
 #include "Icon.h"
 #include "PathContainer.h"
 #include "Shape.h"
@@ -98,6 +100,20 @@ MessageExporter::Export(const Icon* icon, BPositionIO* stream)
 			ret = archive.AddMessage("shapes", &allShapes);
 	}
 
+	// prepend the magic number to the file which
+	// later tells us that this file is one of us
+	if (ret == B_OK) {
+		ssize_t size = sizeof(uint32);
+		uint32 magic = B_HOST_TO_LENDIAN_INT32(kNativeIconMagicNumber);
+		ssize_t written = stream->Write(&magic, size);
+		if (written != size) {
+			if (written < 0)
+				ret = (status_t)written;
+			else
+				ret = B_IO_ERROR;
+		}
+	}
+
 	if (ret == B_OK)
 		ret = archive.Flatten(stream);
 
@@ -108,8 +124,7 @@ MessageExporter::Export(const Icon* icon, BPositionIO* stream)
 const char*
 MessageExporter::MIMEType()
 {
-	// TODO: come up with a MIME type
-	return NULL;
+	return kNativeIconMimeType;
 }
 
 // #pragma mark -

src/apps/icon-o-matic/import_export/message/MessageImporter.cpp

@@ -1,20 +1,21 @@
 /*
- * Copyright 2006, Haiku. All rights reserved.
+ * Copyright 2006-2007, Haiku. All rights reserved.
  * Distributed under the terms of the MIT License.
  *
  * Authors:
  *		Stephan Aßmus <superstippi@gmx.de>
  */
-
 #include "MessageImporter.h"
 
 #include <new>
 #include <stdio.h>
 
 #include <Archivable.h>
+#include <ByteOrder.h>
 #include <DataIO.h>
 #include <Message.h>
 
+#include "Defines.h"
 #include "Icon.h"
 #include "PathContainer.h"
 #include "Shape.h"
@@ -46,6 +47,28 @@ MessageImporter::Import(Icon* icon, BPositionIO* stream)
 		return ret;
 	}
 
+	uint32 magic = 0;
+	ssize_t size = sizeof(magic);
+	off_t position = stream->Position();
+	ssize_t read = stream->Read(&magic, size);
+	if (read != size) {
+		if (read < 0)
+			ret = (status_t)read;
+		else
+			ret = B_IO_ERROR;
+		return ret;
+	}
+
+	if (B_LENDIAN_TO_HOST_INT32(magic) != kNativeIconMagicNumber) {
+		// this might be an old native icon file, where
+		// we didn't prepend the magic number yet, seek back
+		if (stream->Seek(position, SEEK_SET) != position) {
+			printf("MessageImporter::Import() - "
+				   "failed to seek back to beginning of stream\n");
+			return B_IO_ERROR;
+		}
+	}
+
 	BMessage archive;
 	ret = archive.Unflatten(stream);
 	if (ret < B_OK) {