/*

    Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies)

    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., 51 Franklin Street, Fifth Floor,

    Boston, MA 02110-1301, USA.

*/

#include "config.h"

#include "PluginView.h"

#include "Document.h"

#include "DocumentLoader.h"

#include "Element.h"

#include "FocusController.h"

#include "Frame.h"

#include "FrameLoadRequest.h"

#include "FrameLoader.h"

#include "FrameTree.h"

#include "FrameView.h"

#include "GraphicsContext.h"

#include "HTMLNames.h"

#include "HTMLPlugInElement.h"

#include "Image.h"

#include "JSDOMBinding.h"

#include "KeyboardEvent.h"

#include "MouseEvent.h"

#include "NotImplemented.h"

#include "npfunctions.h"

#include "npinterface.h"

#include "Page.h"

#include "PlatformKeyboardEvent.h"

#include "PlatformMouseEvent.h"

#include "PluginContainerSymbian.h"

#include "PluginDebug.h"

#include "PluginMainThreadScheduler.h"

#include "PluginPackage.h"

#include "RenderLayer.h"

#include "ScriptController.h"

#include "Settings.h"

#include "npruntime_impl.h"

#include "runtime.h"

#include "runtime_root.h"

#include "QWebPageClient.h"

#include <QKeyEvent>

#include <QPixmap>

#include <QRegion>

#include <QVector>

#include <QWidget>

#include <runtime/JSLock.h>

#include <runtime/JSValue.h>

using JSC::ExecState;

using JSC::Interpreter;

using JSC::JSLock;

using JSC::JSObject;

using JSC::UString;

using namespace std;

using namespace WTF;

namespace WebCore {

using namespace HTMLNames;

void PluginView::updatePluginWidget()

{

    if (!parent())

        return;

    ASSERT(parent()->isFrameView());

    FrameView* frameView = static_cast<FrameView*>(parent());

    IntRect oldWindowRect = m_windowRect;

    IntRect oldClipRect = m_clipRect;

    m_windowRect = IntRect(frameView->contentsToWindow(frameRect().location()), frameRect().size());

    m_clipRect = windowClipRect();

    m_clipRect.move(-m_windowRect.x(), -m_windowRect.y());

    if (m_windowRect == oldWindowRect && m_clipRect == oldClipRect)

        return;

    // in order to move/resize the plugin window at the same time as the rest of frame

    // during e.g. scrolling, we set the mask and geometry in the paint() function, but

    // as paint() isn't called when the plugin window is outside the frame which can

    // be caused by a scroll, we need to move/resize immediately.

    if (!m_windowRect.intersects(frameView->frameRect()))

        setNPWindowIfNeeded();

}

void PluginView::setFocus()

{

    if (platformPluginWidget())

        platformPluginWidget()->setFocus(Qt::OtherFocusReason);

    else

        Widget::setFocus();

}

void PluginView::show()

{

    setSelfVisible(true);

    if (isParentVisible() && platformPluginWidget())

        platformPluginWidget()->setVisible(true);

}

void PluginView::hide()

{

    setSelfVisible(false);

    if (isParentVisible() && platformPluginWidget())

        platformPluginWidget()->setVisible(false);

}

void PluginView::paint(GraphicsContext* context, const IntRect& rect)

{

    if (!m_isStarted) {

        paintMissingPluginIcon(context, rect);

        return;

    }

    if (context->paintingDisabled())

        return;

    m_npWindow.ws_info = (void*)(context->platformContext());

    setNPWindowIfNeeded();

    if (m_isWindowed && platformPluginWidget())

        static_cast<PluginContainerSymbian*>(platformPluginWidget())->adjustGeometry();

    if (m_isWindowed)

        return;

    context->save();

    IntRect clipRect(rect);

    clipRect.intersect(frameRect());

    context->clip(clipRect);

    context->translate(frameRect().location().x(), frameRect().location().y());

    QPaintEvent ev(rect);

    QEvent& npEvent = ev;

    dispatchNPEvent(npEvent);

    context->restore();

}

// TODO: Unify across ports.

bool PluginView::dispatchNPEvent(NPEvent& event)

{

    if (!m_plugin->pluginFuncs()->event)

        return false;

    PluginView::setCurrentPluginView(this);

    JSC::JSLock::DropAllLocks dropAllLocks(JSC::SilenceAssertionsOnly);

    setCallingPlugin(true);

    bool accepted = m_plugin->pluginFuncs()->event(m_instance, &event);

    setCallingPlugin(false);

    PluginView::setCurrentPluginView(0);

    return accepted;

}

void PluginView::handleKeyboardEvent(KeyboardEvent* event)

{

    if (m_isWindowed)

        return;

    QEvent& npEvent = *(event->keyEvent()->qtEvent());

    if (!dispatchNPEvent(npEvent))

        event->setDefaultHandled();

}

void PluginView::handleMouseEvent(MouseEvent* event)

{

    if (m_isWindowed)

        return;

    if (event->type() == eventNames().mousedownEvent) {

        // Give focus to the plugin on click

        if (Page* page = m_parentFrame->page())

            page->focusController()->setActive(true);

        focusPluginElement();

    }

    QEvent::Type type;

    if (event->type() == eventNames().mousedownEvent)

        type = QEvent::MouseButtonPress;

    else if (event->type() == eventNames().mousemoveEvent)

        type = QEvent::MouseMove;

    else if (event->type() == eventNames().mouseupEvent)

        type = QEvent::MouseButtonRelease;

    else

        return;

    QPoint position(event->offsetX(), event->offsetY());

    Qt::MouseButton button;

    switch (event->which()) {

    case 1:

        button = Qt::LeftButton;

        break;

    case 2:

        button = Qt::MidButton;

        break;

    case 3:

        button = Qt::RightButton;

        break;

    default:

        button = Qt::NoButton;

    }

    Qt::KeyboardModifiers modifiers = 0;

    if (event->ctrlKey())

        modifiers |= Qt::ControlModifier;

    if (event->altKey())

        modifiers |= Qt::AltModifier;

    if (event->shiftKey())

        modifiers |= Qt::ShiftModifier;

    if (event->metaKey())

        modifiers |= Qt::MetaModifier;

    QMouseEvent mouseEvent(type, position, button, button, modifiers); 

    QEvent& npEvent = mouseEvent;

    if (!dispatchNPEvent(npEvent))

        event->setDefaultHandled();

}

void PluginView::setParent(ScrollView* parent)

{

    Widget::setParent(parent);

    if (parent)

        init();

}

void PluginView::setNPWindowRect(const IntRect&)

{

    if (!m_isWindowed)

        setNPWindowIfNeeded();

}

void PluginView::setNPWindowIfNeeded()

{

    if (!m_isStarted || !parent() || !m_plugin->pluginFuncs()->setwindow)

        return;

    if (m_isWindowed) {

        ASSERT(platformPluginWidget());

        platformPluginWidget()->setGeometry(m_windowRect);

        // if setMask is set with an empty QRegion, no clipping will

        // be performed, so in that case we hide the plugin view

        platformPluginWidget()->setVisible(!m_clipRect.isEmpty());

        platformPluginWidget()->setMask(QRegion(m_clipRect));

        m_npWindow.x = m_windowRect.x();

        m_npWindow.y = m_windowRect.y();

        m_npWindow.clipRect.left = m_clipRect.x();

        m_npWindow.clipRect.top = m_clipRect.y();

        m_npWindow.clipRect.right = m_clipRect.width();

        m_npWindow.clipRect.bottom = m_clipRect.height();

    } else {

        // always call this method before painting.

        m_npWindow.x = 0;

        m_npWindow.y = 0;

        m_npWindow.clipRect.left = 0;

        m_npWindow.clipRect.top = 0;

        m_npWindow.clipRect.right = m_windowRect.width();

        m_npWindow.clipRect.bottom = m_windowRect.height();

        m_npWindow.window = 0;

    }

    m_npWindow.width = m_windowRect.width();

    m_npWindow.height = m_windowRect.height();

    PluginView::setCurrentPluginView(this);

    JSC::JSLock::DropAllLocks dropAllLocks(JSC::SilenceAssertionsOnly);

    setCallingPlugin(true);

    m_plugin->pluginFuncs()->setwindow(m_instance, &m_npWindow);

    setCallingPlugin(false);

    PluginView::setCurrentPluginView(0);

}

void PluginView::setParentVisible(bool visible)

{

    if (isParentVisible() == visible)

        return;

    Widget::setParentVisible(visible);

    if (isSelfVisible() && platformPluginWidget())

        platformPluginWidget()->setVisible(visible);

}

NPError PluginView::handlePostReadFile(Vector<char>& buffer, uint32 len, const char* buf)

{

    notImplemented();

    return NPERR_NO_ERROR;

}

NPError PluginView::getValueStatic(NPNVariable variable, void* value)

{

    LOG(Plugins, "PluginView::getValueStatic(%s)", prettyNameForNPNVariable(variable).data());

    switch (variable) {

    case NPNVjavascriptEnabledBool:

        *static_cast<NPBool*>(value) = true;

        return NPERR_NO_ERROR;

    case NPNVSupportsWindowless:

        *static_cast<NPBool*>(value) = true;

        return NPERR_NO_ERROR;

    default:

        return NPERR_GENERIC_ERROR;

    }

}

NPError PluginView::getValue(NPNVariable variable, void* value)

{

    LOG(Plugins, "PluginView::getValue(%s)", prettyNameForNPNVariable(variable).data());

    switch (variable) {

    case NPNVWindowNPObject: {

        if (m_isJavaScriptPaused)

            return NPERR_GENERIC_ERROR;

        NPObject* windowScriptObject = m_parentFrame->script()->windowScriptNPObject();

        // Return value is expected to be retained, as described here: <http://www.mozilla.org/projects/plugin/npruntime.html>

        if (windowScriptObject)

            _NPN_RetainObject(windowScriptObject);

        void** v = (void**)value;

        *v = windowScriptObject;

        return NPERR_NO_ERROR;

    }

    case NPNVPluginElementNPObject: {

        if (m_isJavaScriptPaused)

            return NPERR_GENERIC_ERROR;

        NPObject* pluginScriptObject = 0;

        if (m_element->hasTagName(appletTag) || m_element->hasTagName(embedTag) || m_element->hasTagName(objectTag))

            pluginScriptObject = static_cast<HTMLPlugInElement*>(m_element)->getNPObject();

        // Return value is expected to be retained, as described here: <http://www.mozilla.org/projects/plugin/npruntime.html>

        if (pluginScriptObject)

            _NPN_RetainObject(pluginScriptObject);

        void** v = (void**)value;

        *v = pluginScriptObject;

        return NPERR_NO_ERROR;

    }        

    default:

        return getValueStatic(variable, value);

    }

}

void PluginView::invalidateRect(const IntRect& rect)

{

    if (m_isWindowed) {

        platformWidget()->update(rect);

        return;

    }

    invalidateWindowlessPluginRect(rect);

}

void PluginView::invalidateRect(NPRect* rect)

{

    if (m_isWindowed)

        return;

    if (!rect) {

        invalidate();

        return;

    }

    IntRect r(rect->left, rect->top, rect->right - rect->left, rect->bottom - rect->top);

    m_invalidRects.append(r);

    if (!m_invalidateTimer.isActive())

        m_invalidateTimer.startOneShot(0.001);

}

void PluginView::invalidateRegion(NPRegion region)

{

    if (m_isWindowed)

        return;

    if (!region) 

        return;

    QVector<QRect> rects = region->rects();

    for (int i = 0; i < rects.size(); ++i) {

        const QRect& qRect = rects.at(i);

        m_invalidRects.append(qRect);

        if (!m_invalidateTimer.isActive())

            m_invalidateTimer.startOneShot(0.001);

    }

}

void PluginView::forceRedraw()

{

    if (m_isWindowed)

        return;

    invalidate();

}

bool PluginView::platformStart()

{

    ASSERT(m_isStarted);

    ASSERT(m_status == PluginStatusLoadedSuccessfully);

    show();

    if (m_isWindowed) {

        QWebPageClient* client = m_parentFrame->view()->hostWindow()->platformPageClient();

        m_npWindow.type = NPWindowTypeWindow;

        m_npWindow.window = (void*)platformPluginWidget();

    } else {

        setPlatformWidget(0);

        m_npWindow.type = NPWindowTypeDrawable;

        m_npWindow.window = 0; // Not used?

    }    

    setNPWindowIfNeeded();

    return true;

}

void PluginView::platformDestroy()

{

}

void PluginView::halt()

{

}

void PluginView::restart()

{

}

} // namespace WebCore