From e5ea208d71e38620c934043f072a68b3edd45ff4 Mon Sep 17 00:00:00 2001
From: Ingo Weinhold <ingo_weinhold@gmx.de>
Date: Sat, 17 Jul 2010 02:04:32 +0000
Subject: [PATCH] Patch by Alex Wilson: * Added archiving/unarchiving support.
 * Coding style cleanup (some by myself).

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@37549 a95241bf-73f2-0310-859d-f6bbb57e9c96
---
 src/kits/interface/ViewLayoutItem.cpp | 105 +++++++++++++++++++++-----
 src/kits/interface/ViewLayoutItem.h   |   8 +-
 2 files changed, 93 insertions(+), 20 deletions(-)

diff --git a/src/kits/interface/ViewLayoutItem.cpp b/src/kits/interface/ViewLayoutItem.cpp
index 47ed990790..8ce7696355 100644
--- a/src/kits/interface/ViewLayoutItem.cpp
+++ b/src/kits/interface/ViewLayoutItem.cpp
@@ -1,88 +1,109 @@
 /*
+ * Copyright 2010, Haiku, Inc.
  * Copyright 2006, Ingo Weinhold <bonefish@cs.tu-berlin.de>.
  * All rights reserved. Distributed under the terms of the MIT License.
  */
 
+
 #include "ViewLayoutItem.h"
 
+#include <new>
+
+#include <Layout.h>
 #include <View.h>
 
 
-// constructor
+namespace {
+	const char* kViewField = "ViewLayoutItem:view";
+}
+
+
 BViewLayoutItem::BViewLayoutItem(BView* view)
-	: fView(view)
+	:
+	fView(view)
 {
 }
 
-// destructor
+
+BViewLayoutItem::BViewLayoutItem(BMessage* from)
+	:
+	BLayoutItem(BUnarchiver::PrepareArchive(from)),
+	fView(NULL)
+{
+	BUnarchiver unarchiver(from);
+	unarchiver.Finish(unarchiver.FindObject<BView>(kViewField, 0,
+		BUnarchiver::B_DONT_ASSUME_OWNERSHIP, fView));
+}
+
+
 BViewLayoutItem::~BViewLayoutItem()
 {
 }
 
-// MinSize
+
 BSize
 BViewLayoutItem::MinSize()
 {
 	return fView->MinSize();
 }
 
-// MaxSize
+
 BSize
 BViewLayoutItem::MaxSize()
 {
 	return fView->MaxSize();
 }
 
-// PreferredSize
+
 BSize
 BViewLayoutItem::PreferredSize()
 {
 	return fView->PreferredSize();
 }
 
-// Alignment
+
 BAlignment
 BViewLayoutItem::Alignment()
 {
 	return fView->LayoutAlignment();
 }
 
-// SetExplicitMinSize
+
 void
 BViewLayoutItem::SetExplicitMinSize(BSize size)
 {
 	fView->SetExplicitMinSize(size);
 }
 
-// SetExplicitMaxSize
+
 void
 BViewLayoutItem::SetExplicitMaxSize(BSize size)
 {
 	fView->SetExplicitMaxSize(size);
 }
 
-// SetExplicitPreferredSize
+
 void
 BViewLayoutItem::SetExplicitPreferredSize(BSize size)
 {
 	fView->SetExplicitPreferredSize(size);
 }
 
-// SetExplicitAlignment
+
 void
 BViewLayoutItem::SetExplicitAlignment(BAlignment alignment)
 {
 	fView->SetExplicitAlignment(alignment);
 }
 
-// IsVisible
+
 bool
 BViewLayoutItem::IsVisible()
 {
 	return !fView->IsHidden(fView);
 }
 
-// SetVisible
+
 void
 BViewLayoutItem::SetVisible(bool visible)
 {
@@ -94,14 +115,14 @@ BViewLayoutItem::SetVisible(bool visible)
 	}
 }
 
-// Frame
+
 BRect
 BViewLayoutItem::Frame()
 {
 	return fView->Frame();
 }
 
-// SetFrame
+
 void
 BViewLayoutItem::SetFrame(BRect frame)
 {
@@ -109,14 +130,14 @@ BViewLayoutItem::SetFrame(BRect frame)
 	fView->ResizeTo(frame.Width(), frame.Height());
 }
 
-// HasHeightForWidth
+
 bool
 BViewLayoutItem::HasHeightForWidth()
 {
 	return fView->HasHeightForWidth();
 }
 
-// GetHeightForWidth
+
 void
 BViewLayoutItem::GetHeightForWidth(float width, float* min, float* max,
 	float* preferred)
@@ -124,16 +145,62 @@ BViewLayoutItem::GetHeightForWidth(float width, float* min, float* max,
 	fView->GetHeightForWidth(width, min, max, preferred);
 }
 
-// View
+
 BView*
 BViewLayoutItem::View()
 {
 	return fView;
 }
 
-// InvalidateLayout
+
 void
 BViewLayoutItem::InvalidateLayout()
 {
 	fView->InvalidateLayout();
 }
+
+
+status_t
+BViewLayoutItem::Archive(BMessage* into, bool deep) const
+{
+	BArchiver archiver(into);
+	status_t err = BLayoutItem::Archive(into, deep);
+
+	return archiver.Finish(err);
+}
+
+
+status_t
+BViewLayoutItem::AllArchived(BMessage* into) const
+{
+	BArchiver archiver(into);
+	status_t err = BLayoutItem::AllArchived(into);
+
+	if (err == B_OK) {
+		if (archiver.IsArchived(fView))
+			err = archiver.AddArchivable(kViewField, fView);
+		else
+			err = B_NAME_NOT_FOUND;
+	}
+
+	return err;
+}
+
+
+status_t
+BViewLayoutItem::AllUnarchived(const BMessage* from)
+{
+	if (!fView)
+		return B_ERROR;
+
+	return BLayoutItem::AllUnarchived(from);
+}
+
+
+BArchivable*
+BViewLayoutItem::Instantiate(BMessage* from)
+{
+	if (validate_instantiation(from, "BViewLayoutItem"))
+		return new(std::nothrow) BViewLayoutItem(from);
+	return NULL;
+}
diff --git a/src/kits/interface/ViewLayoutItem.h b/src/kits/interface/ViewLayoutItem.h
index 0fe78ff937..ee32b63d1d 100644
--- a/src/kits/interface/ViewLayoutItem.h
+++ b/src/kits/interface/ViewLayoutItem.h
@@ -1,5 +1,5 @@
 /*
- * Copyright 2006, Haiku Inc.
+ * Copyright 2006-2010, Haiku Inc.
  * Distributed under the terms of the MIT License.
  */
 #ifndef	_VIEW_LAYOUT_ITEM_H
@@ -11,6 +11,7 @@
 class BViewLayoutItem : public BLayoutItem {
 public:
 								BViewLayoutItem(BView* view);
+								BViewLayoutItem(BMessage* from);
 	virtual						~BViewLayoutItem();
 
 	virtual	BSize				MinSize();
@@ -37,6 +38,11 @@ public:
 
 	virtual	void				InvalidateLayout();
 
+	virtual	status_t			Archive(BMessage* into, bool deep = true) const;
+	virtual status_t			AllArchived(BMessage* into) const;
+	virtual status_t			AllUnarchived(const BMessage* from);
+	static	BArchivable*		Instantiate(BMessage* from);
+
 private:
 			BView*				fView;
 };