/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
 *
 * The contents of this file are subject to the Netscape Public License
 * Version 1.0 (the "NPL"); you may not use this file except in
 * compliance with the NPL.  You may obtain a copy of the NPL at
 * http://www.mozilla.org/NPL/
 *
 * Software distributed under the NPL is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
 * for the specific language governing rights and limitations under the
 * NPL.
 *
 * The Initial Developer of this code under the NPL is Netscape
 * Communications Corporation.  Portions created by Netscape are
 * Copyright (C) 1998 Netscape Communications Corporation.  All Rights
 * Reserved.
 */

// ===========================================================================
//	CNavigationButtonPopup.cp
//
// ===========================================================================

#include "CNavigationButtonPopup.h"
		
#include "prefapi.h"		
#include "xp_mem.h"
#include "shist.h"
#include "Netscape_Constants.h"
#include "CWindowMediator.h"
#include "CBrowserContext.h"
#include "CBrowserWindow.h"
#include "UMenuUtils.h"
#include "CAutoPtr.h"
#include "macutil.h"
#include "net.h"

#include <string>
		
// ---------------------------------------------------------------------------
//		¥ CNavigationButtonPopup
// ---------------------------------------------------------------------------

CNavigationButtonPopup::CNavigationButtonPopup(
	LStream* inStream)

	:	mBrowserContext(nil),
		mHistory(nil),
		mCurrentEntry(nil),
		mCurrentEntryIndex(0),
		mNumItemsInHistory(0),
	
		super(inStream)
{
}

// ---------------------------------------------------------------------------
//		¥ ~CNavigationButtonPopup
// ---------------------------------------------------------------------------

CNavigationButtonPopup::~CNavigationButtonPopup()
{
}
	
#pragma mark -

// ---------------------------------------------------------------------------
//		¥ AdjustMenuContents
// ---------------------------------------------------------------------------

void
CNavigationButtonPopup::AdjustMenuContents()
{
	if (!GetMenu() || !GetMenu()->GetMacMenuH())
	{
		return;
	}
	
	if (!AssertPreconditions())
	{
		return;
	}
		
	// Purge the menu

	UMenuUtils::PurgeMenuItems(GetMenu()->GetMacMenuH());
	
	// Fill the menu
	
	if (GetQuickClickValueOrCommand() == cmd_GoBack)
	{
		for (int insertAfterItem = 0, i = mCurrentEntryIndex - 1; i >= 1; i--, insertAfterItem++)
		{
			InsertHistoryItemIntoMenu(i, insertAfterItem);
		}
	}
	else if (GetQuickClickValueOrCommand() == cmd_GoForward)
	{
		for (int insertAfterItem = 0, i = mCurrentEntryIndex + 1; i <= mNumItemsInHistory; i++, insertAfterItem++)
		{
			InsertHistoryItemIntoMenu(i, insertAfterItem);
		}
	}
	
	// Set the min/max values of the control since we populated the menu
	
	SetPopupMinMaxValues();
}

// ---------------------------------------------------------------------------
//		¥ InsertHistoryItemIntoMenu
// ---------------------------------------------------------------------------

void
CNavigationButtonPopup::InsertHistoryItemIntoMenu(
	Int32				inHistoryItemIndex,
	Int16				inAfterItem)
{
	Assert_(GetMenu() && GetMenu()->GetMacMenuH());
	Assert_(mBrowserContext);

	CAutoPtr<cstring> theTitle = mBrowserContext->GetHistoryEntryTitleByIndex(inHistoryItemIndex);
	
	if (!theTitle.get() || !theTitle->length())
	{
		theTitle.reset(new cstring);
		mBrowserContext->GetHistoryURLByIndex(*theTitle, inHistoryItemIndex);
	}
	
	UMenuUtils::AdjustStringForMenuTitle(*theTitle);
	
	LStr255 thePString(*theTitle);

	// Insert a "blank" item first...
	
	::InsertMenuItem(GetMenu()->GetMacMenuH(), "\p ", inAfterItem + 1);
	
	// Then change it. We do this so that no interpretation of metacharacters will occur.
	
	::SetMenuItemText(GetMenu()->GetMacMenuH(), inAfterItem + 1, thePString);
}
	
#pragma mark -

// ---------------------------------------------------------------------------
//		¥ HandleNewValue
// ---------------------------------------------------------------------------

Boolean
CNavigationButtonPopup::HandleNewValue(
	Int32	inNewValue)
{
	if (AssertPreconditions() && inNewValue)
	{
		Int32 historyIndex = 0;

		if (GetQuickClickValueOrCommand() == cmd_GoBack)
		{
			historyIndex = SHIST_GetIndex(mHistory, mCurrentEntry) - inNewValue;
		}
		else if (GetQuickClickValueOrCommand() == cmd_GoForward)
		{
			historyIndex = SHIST_GetIndex(mHistory, mCurrentEntry) + inNewValue;
		}

		if (historyIndex)
		{
			mBrowserContext->LoadHistoryEntry(historyIndex);
		}
	}
	
	return true;
}

// ---------------------------------------------------------------------------
//		¥ AssertPreconditions
// ---------------------------------------------------------------------------
//	Assert preconditions and fill in interesting member data

Boolean
CNavigationButtonPopup::AssertPreconditions()
{	
	CMediatedWindow* topWindow = CWindowMediator::GetWindowMediator()->FetchTopWindow(WindowType_Any, regularLayerType);
	
	if (!topWindow || topWindow->GetWindowType() != WindowType_Browser)
	{
		return false;
	}
	
	CBrowserWindow* browserWindow = dynamic_cast<CBrowserWindow*>(topWindow);

	if (!browserWindow)
	{
		return false;
	}
	
	if (!(mBrowserContext = (CBrowserContext*)browserWindow->GetWindowContext()))
	{
		return false;
	}

	if (!(mHistory = &((MWContext*)(*mBrowserContext))->hist))
	{
		return false;
	}
	
	if (!(mCurrentEntry = mBrowserContext->GetCurrentHistoryEntry()))
	{
		return false;
	}

	mCurrentEntryIndex = SHIST_GetIndex(mHistory, mCurrentEntry);
	
	mNumItemsInHistory = mBrowserContext->GetHistoryListCount();
	
	return true;
}