// -*- c-basic-offset: 4 -*-
/*
 * Copyright (C) 2006 Apple Computer, Inc.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public License
 * along with this library; see the file COPYING.LIB.  If not, write to
 * the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */

#include "config.h"
#include "Page.h"

#include "Frame.h"
#include "FrameTree.h"
#include "StringHash.h"
#include "Widget.h"
#include <kjs/collector.h>
#include <kjs/JSLock.h>
#include <wtf/HashMap.h>

using namespace KJS;

namespace WebCore {

static HashSet<Page*>* allPages;
static HashMap<String, HashSet<Page*>*>* frameNamespaces;

void Page::init()
{
    if (!allPages) {
        allPages = new HashSet<Page*>;
        setFocusRingColorChangeFunction(setNeedsReapplyStyles);
    }
    ASSERT(!allPages->contains(this));
    allPages->add(this);
}

Page::~Page()
{
    m_mainFrame->setView(0);
    setGroupName(String());
    allPages->remove(this);
    
    for (Frame* frame = mainFrame(); frame; frame = frame->tree()->traverseNext())
        frame->pageDestroyed();
    
#ifndef NDEBUG
    // Cancel keepAlive timers, to ensure we release all Frames before exiting.
    // It's safe to do this because we prohibit closing a Page while JavaScript
    // is executing.
    Frame::cancelAllKeepAlive();
#endif
}

void Page::setMainFrame(PassRefPtr<Frame> mainFrame)
{
    ASSERT(!m_mainFrame);
    m_mainFrame = mainFrame;
}

void Page::setGroupName(const String& name)
{
    if (frameNamespaces && !m_groupName.isEmpty()) {
        HashSet<Page*>* oldNamespace = frameNamespaces->get(m_groupName);
        if (oldNamespace) {
            oldNamespace->remove(this);
            if (oldNamespace->isEmpty()) {
                frameNamespaces->remove(m_groupName);
                delete oldNamespace;
            }
        }
    }
    m_groupName = name;
    if (!name.isEmpty()) {
        if (!frameNamespaces)
            frameNamespaces = new HashMap<String, HashSet<Page*>*>;
        HashSet<Page*>* newNamespace = frameNamespaces->get(name);
        if (!newNamespace) {
            newNamespace = new HashSet<Page*>;
            frameNamespaces->add(name, newNamespace);
        }
        newNamespace->add(this);
    }
}

const HashSet<Page*>* Page::frameNamespace() const
{
    return (frameNamespaces && !m_groupName.isEmpty()) ? frameNamespaces->get(m_groupName) : 0;
}

const HashSet<Page*>* Page::frameNamespace(const String& groupName)
{
    return (frameNamespaces && !groupName.isEmpty()) ? frameNamespaces->get(groupName) : 0;
}

void Page::setNeedsReapplyStyles()
{
    if (!allPages)
        return;
    HashSet<Page*>::iterator end = allPages->end();
    for (HashSet<Page*>::iterator it = allPages->begin(); it != end; ++it)
        for (Frame* frame = (*it)->mainFrame(); frame; frame = frame->tree()->traverseNext())
            frame->setNeedsReapplyStyles();
}

void Page::setNeedsReapplyStylesForSettingsChange(Settings* settings)
{
    if (!allPages)
        return;
    HashSet<Page*>::iterator end = allPages->end();
    for (HashSet<Page*>::iterator it = allPages->begin(); it != end; ++it)
        for (Frame* frame = (*it)->mainFrame(); frame; frame = frame->tree()->traverseNext())
            if (frame->settings() == settings)
                frame->setNeedsReapplyStyles();
}

SelectionController& Page::dragCaret() const
{
    return m_dragCaret;
}

void Page::setDragCaret(const SelectionController& dragCaret)
{
    if (m_dragCaret != dragCaret) {
        m_dragCaret.needsCaretRepaint();
        m_dragCaret = dragCaret;
        m_dragCaret.needsCaretRepaint();
    }
}

}