Initial checkin of AreaLink

git-svn-id: file:///srv/svn/repos/haiku/trunk/current@2977 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/kits/app/AreaLink.cpp

@@ -0,0 +1,212 @@
+//------------------------------------------------------------------------------
+//	Copyright (c) 2001-2002, OpenBeOS
+//
+//	Permission is hereby granted, free of charge, to any person obtaining a
+//	copy of this software and associated documentation files (the "Software"),
+//	to deal in the Software without restriction, including without limitation
+//	the rights to use, copy, modify, merge, publish, distribute, sublicense,
+//	and/or sell copies of the Software, and to permit persons to whom the
+//	Software is furnished to do so, subject to the following conditions:
+//
+//	The above copyright notice and this permission notice shall be included in
+//	all copies or substantial portions of the Software.
+//
+//	THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//	IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//	FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//	AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//	LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+//	FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+//	DEALINGS IN THE SOFTWARE.
+//
+//	File Name:		AreaLink.cpp
+//	Author:			DarkWyrm <bpmagic@columbus.rr.com>
+//	Description:	Helper class for managing chunks of small data in an area
+//  
+//------------------------------------------------------------------------------
+#include <Rect.h>
+#include "AreaLink.h"
+
+//#define AL_DEBUG
+ 
+#ifdef AL_DEBUG
+#include <stdio.h>
+#endif
+
+class AreaLinkHeader
+{
+public:
+	AreaLinkHeader(void) { MakeEmpty(); lock=B_NAME_NOT_FOUND; }
+
+	void SetAttachmentCount(uint32 size) { attachmentcount=size; }
+	uint32 GetAttachmentCount(void) { return attachmentcount; }
+
+	void SetAttachmentSize(uint32 size) { attachmentsize=size; }
+	uint32 GetAttachmentSize(void) { return attachmentsize; }
+	
+	void AddAttachment(uint32 size) { attachmentsize+=size; attachmentcount++; }
+	
+	void SetLockSem(sem_id sem) { lock=sem; }
+	sem_id GetLockSem(void) { return lock; }
+
+	void MakeEmpty(void) { attachmentcount=0; attachmentsize=0; }
+	area_info GetInfo(void) { return info; }
+	void SetInfo(const area_info &newinfo) { info=newinfo; }
+private:
+	uint32 attachmentcount;
+	uint32 attachmentsize;
+	sem_id lock;
+	area_info info;
+};
+
+AreaLink::AreaLink(area_id area, bool is_arealink_area)
+{
+	attachlist=new BList(0);
+	have_lock=false;
+	SetTarget(area,is_arealink_area);
+}
+
+AreaLink::AreaLink(void)
+{
+	attachlist=new BList(0);
+	area_ok=false;
+	have_lock=false;
+	target=B_NAME_NOT_FOUND;
+}
+
+AreaLink::~AreaLink(void)
+{
+	delete attachlist;
+}
+
+void AreaLink::SetTarget(area_id area,bool is_arealink_area)
+{
+	area_info targetinfo;
+
+	if(get_area_info(area,&targetinfo)==B_OK)
+	{
+		target=area;
+		area_ok=true;
+		header=(AreaLinkHeader *)targetinfo.address;
+
+		if(is_arealink_area)
+			_ReadAttachments();
+		else
+		{
+			header->MakeEmpty();
+			header->SetInfo(targetinfo);
+		}
+
+		baseaddress=(int8*)targetinfo.address;
+		baseaddress+=sizeof(AreaLinkHeader);
+	}
+	else
+	{
+		target=B_NAME_NOT_FOUND;
+		area_ok=false;
+	}
+}
+
+void AreaLink::Attach(const void *data, size_t size)
+{
+	if(!data || size==0)
+		return;
+	
+	Lock();
+	
+	// Will the attachment fit?
+	if(header->GetAttachmentSize()+size>header->GetInfo().size)
+	{
+		// Being it won't fit, resize the area to fit the thing
+		int32 pagenum=int32(header->GetInfo().size/B_PAGE_SIZE);
+		resize_area(target,pagenum+1);
+	}
+	
+	// Our attachment will fit, so copy the data into the current location
+	// and increment the appropriate header values
+	int8 *currentpointer=(int8*)BaseAddress();
+	currentpointer+=header->GetAttachmentSize();
+	memcpy(currentpointer,data,size);
+
+	attachlist->AddItem(currentpointer);
+	header->AddAttachment(size);
+	
+	Unlock();
+}
+
+void AreaLink::Attach(const int32 &data)
+{
+	Attach(&data,sizeof(int32));
+}
+
+void AreaLink::Attach(const int16 &data)
+{
+	Attach(&data,sizeof(int16));
+}
+
+void AreaLink::Attach(const int8 &data)
+{
+	Attach(&data,sizeof(int8));
+}
+
+void AreaLink::Attach(const float &data)
+{
+	Attach(&data,sizeof(float));
+}
+
+void AreaLink::Attach(const bool &data)
+{
+	Attach(&data,sizeof(bool));
+}
+
+void AreaLink::Attach(const rgb_color &data)
+{
+	Attach(&data,sizeof(rgb_color));
+}
+
+void AreaLink::Attach(const BRect &data)
+{
+	Attach(&data,sizeof(BRect));
+}
+
+void AreaLink::Attach(const BPoint &data)
+{
+	Attach(&data,sizeof(BPoint));
+}
+
+void AreaLink::MakeEmpty(void)
+{
+	attachlist->MakeEmpty();
+	header->MakeEmpty();
+}
+
+void AreaLink::_ReadAttachments(void)
+{
+	int8 *index=baseaddress;
+	uint16 size;
+	
+	for(uint32 i=0; i<header->GetAttachmentCount();i++)
+	{
+		size=*((int16*)index);
+		baseaddress+=SIZE_SIZE;
+		attachlist->AddItem(baseaddress);
+		baseaddress+=size;
+	}
+}
+
+void AreaLink::Lock(void)
+{
+	if(!have_lock)
+		acquire_sem(header->GetLockSem());
+}
+
+void AreaLink::Unlock(void)
+{
+	if(have_lock)
+		release_sem(header->GetLockSem());
+}
+
+bool AreaLink::IsLocked(void)
+{
+	return have_lock;
+}

src/kits/app/app.src

@@ -2,6 +2,7 @@ APP_KIT_SOURCE =
 	Application.cpp
 	AppMisc.cpp
 	AppServerLink.cpp
+	AreaLink.cpp
 	Cursor.cpp
 	DataBuffer.cpp
 	Clipboard.cpp