ChromeClient.h   [plain text]

/*
 * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple, Inc. All rights reserved.
 * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
 * Copyright (C) 2012 Samsung Electronics. All rights reserved.
 *
 * 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.
 */

#ifndef ChromeClient_h
#define ChromeClient_h

#include "AXObjectCache.h"
#include "ConsoleAPITypes.h"
#include "ConsoleTypes.h"
#include "Cursor.h"
#include "FocusDirection.h"
#include "FrameLoader.h"
#include "GraphicsContext.h"
#include "HostWindow.h"
#include "PopupMenu.h"
#include "PopupMenuClient.h"
#include "RenderEmbeddedObject.h"
#include "ScrollTypes.h"
#include "SearchPopupMenu.h"
#include "WebCoreKeyboardUIMode.h"
#include <wtf/Forward.h>
#include <wtf/PassOwnPtr.h>
#include <wtf/Vector.h>

#if PLATFORM(IOS)
#include "Console.h"
#include "GraphicsLayer.h"
#include <wtf/HashMap.h>

#define NSResponder WAKResponder
#ifndef __OBJC__
class WAKResponder;
#else
@class WAKResponder;
#endif
#endif

#if ENABLE(SQL_DATABASE)
#include "DatabaseDetails.h"
#endif

OBJC_CLASS NSResponder;

namespace WebCore {

class AccessibilityObject;
class ColorChooser;
class ColorChooserClient;
class DateTimeChooser;
class DateTimeChooserClient;
class Element;
class FileChooser;
class FileIconLoader;
class FloatRect;
class Frame;
class Geolocation;
class GraphicsContext3D;
class GraphicsLayer;
class GraphicsLayerFactory;
class HitTestResult;
class HTMLInputElement;
class IntRect;
class NavigationAction;
class Node;
class Page;
class PopupMenuClient;
class SecurityOrigin;
class Widget;

struct DateTimeChooserParameters;
struct FrameLoadRequest;
struct GraphicsDeviceAdapter;
struct ViewportArguments;
struct WindowFeatures;

#if PLATFORM(IOS)
class ViewportConstraints;
#endif

class ChromeClient {
public:
    virtual void chromeDestroyed() = 0;

    virtual void setWindowRect(const FloatRect&) = 0;
    virtual FloatRect windowRect() = 0;

    virtual FloatRect pageRect() = 0;

    virtual void focus() = 0;
    virtual void unfocus() = 0;

    virtual bool canTakeFocus(FocusDirection) = 0;
    virtual void takeFocus(FocusDirection) = 0;

    virtual void focusedNodeChanged(Node*) = 0;
    virtual void focusedFrameChanged(Frame*) = 0;

    // The Frame pointer provides the ChromeClient with context about which
    // Frame wants to create the new Page. Also, the newly created window
    // should not be shown to the user until the ChromeClient of the newly
    // created Page has its show method called.
    // The FrameLoadRequest parameter is only for ChromeClient to check if the
    // request could be fulfilled. The ChromeClient should not load the request.
    virtual Page* createWindow(Frame*, const FrameLoadRequest&, const WindowFeatures&, const NavigationAction&) = 0;
    virtual void show() = 0;

    virtual bool canRunModal() = 0;
    virtual void runModal() = 0;

    virtual void setToolbarsVisible(bool) = 0;
    virtual bool toolbarsVisible() = 0;

    virtual void setStatusbarVisible(bool) = 0;
    virtual bool statusbarVisible() = 0;

    virtual void setScrollbarsVisible(bool) = 0;
    virtual bool scrollbarsVisible() = 0;

    virtual void setMenubarVisible(bool) = 0;
    virtual bool menubarVisible() = 0;

    virtual void setResizable(bool) = 0;

    virtual void addMessageToConsole(MessageSource, MessageLevel, const String& message, unsigned lineNumber, unsigned columnNumber, const String& sourceID) = 0;
    // FIXME: Remove this MessageType variant once all the clients are updated.
    virtual void addMessageToConsole(MessageSource source, MessageType, MessageLevel level, const String& message, unsigned lineNumber, unsigned columnNumber, const String& sourceID)
    {
        addMessageToConsole(source, level, message, lineNumber, columnNumber, sourceID);
    }

    virtual bool canRunBeforeUnloadConfirmPanel() = 0;
    virtual bool runBeforeUnloadConfirmPanel(const String& message, Frame*) = 0;

    virtual void closeWindowSoon() = 0;

    virtual void runJavaScriptAlert(Frame*, const String&) = 0;
    virtual bool runJavaScriptConfirm(Frame*, const String&) = 0;
    virtual bool runJavaScriptPrompt(Frame*, const String& message, const String& defaultValue, String& result) = 0;
    virtual void setStatusbarText(const String&) = 0;
    virtual bool shouldInterruptJavaScript() = 0;
    virtual KeyboardUIMode keyboardUIMode() = 0;

    virtual IntRect windowResizerRect() const = 0;

    // Methods used by HostWindow.
    virtual bool supportsImmediateInvalidation() { return false; }
    virtual void invalidateRootView(const IntRect&, bool immediate) = 0;
    virtual void invalidateContentsAndRootView(const IntRect&, bool immediate) = 0;
    virtual void invalidateContentsForSlowScroll(const IntRect&, bool immediate) = 0;
    virtual void scroll(const IntSize&, const IntRect&, const IntRect&) = 0;
#if USE(TILED_BACKING_STORE)
    virtual void delegatedScrollRequested(const IntPoint&) = 0;
#endif
    virtual IntPoint screenToRootView(const IntPoint&) const = 0;
    virtual IntRect rootViewToScreen(const IntRect&) const = 0;
    virtual PlatformPageClient platformPageClient() const = 0;
    virtual void scrollbarsModeDidChange() const = 0;
#if !PLATFORM(IOS)
    virtual void setCursor(const Cursor&) = 0;
    virtual void setCursorHiddenUntilMouseMoves(bool) = 0;
#endif
#if ENABLE(REQUEST_ANIMATION_FRAME) && !USE(REQUEST_ANIMATION_FRAME_TIMER)
    virtual void scheduleAnimation() = 0;
#endif
    // End methods used by HostWindow.

    virtual void dispatchViewportPropertiesDidChange(const ViewportArguments&) const { }

    virtual void contentsSizeChanged(Frame*, const IntSize&) const = 0;
    virtual void layoutUpdated(Frame*) const { }
    virtual void scrollRectIntoView(const IntRect&) const { }; // Currently only Mac has a non empty implementation.

    virtual bool shouldUnavailablePluginMessageBeButton(RenderEmbeddedObject::PluginUnavailabilityReason) const { return false; }
    virtual void unavailablePluginButtonClicked(Element*, RenderEmbeddedObject::PluginUnavailabilityReason) const { }
    virtual void mouseDidMoveOverElement(const HitTestResult&, unsigned modifierFlags) = 0;

    virtual void setToolTip(const String&, TextDirection) = 0;

    virtual void print(Frame*) = 0;
    virtual bool shouldRubberBandInDirection(ScrollDirection) const = 0;

    virtual Color underlayColor() const { return Color(); }

#if ENABLE(SQL_DATABASE)
    virtual void exceededDatabaseQuota(Frame*, const String& databaseName, DatabaseDetails) = 0;
#endif

    // Callback invoked when the application cache fails to save a cache object
    // because storing it would grow the database file past its defined maximum
    // size or past the amount of free space on the device. 
    // The chrome client would need to take some action such as evicting some
    // old caches.
    virtual void reachedMaxAppCacheSize(int64_t spaceNeeded) = 0;

    // Callback invoked when the application cache origin quota is reached. This
    // means that the resources attempting to be cached via the manifest are
    // more than allowed on this origin. This callback allows the chrome client
    // to take action, such as prompting the user to ask to increase the quota
    // for this origin. The totalSpaceNeeded parameter is the total amount of
    // storage, in bytes, needed to store the new cache along with all of the
    // other existing caches for the origin that would not be replaced by
    // the new cache.
    virtual void reachedApplicationCacheOriginQuota(SecurityOrigin*, int64_t totalSpaceNeeded) = 0;

#if ENABLE(DASHBOARD_SUPPORT) || ENABLE(DRAGGABLE_REGION)
    virtual void annotatedRegionsChanged();
#endif

    virtual void populateVisitedLinks();

    virtual FloatRect customHighlightRect(Node*, const AtomicString& type, const FloatRect& lineRect);
    virtual void paintCustomHighlight(Node*, const AtomicString& type, const FloatRect& boxRect, const FloatRect& lineRect, bool behindText, bool entireLine);
            
    virtual bool shouldReplaceWithGeneratedFileForUpload(const String& path, String& generatedFilename);
    virtual String generateReplacementFile(const String& path);

    virtual bool paintCustomOverhangArea(GraphicsContext*, const IntRect&, const IntRect&, const IntRect&);

#if PLATFORM(IOS)
#if ENABLE(TOUCH_EVENTS)
    virtual void didPreventDefaultForEvent() = 0;
#endif
    virtual void didReceiveDocType(Frame*) = 0;
    virtual void setNeedsScrollNotifications(Frame*, bool) = 0;
    virtual void observedContentChange(Frame*) = 0;
    virtual void clearContentChangeObservers(Frame*) = 0;
    virtual void notifyRevealedSelectionByScrollingFrame(Frame*) = 0;
    virtual bool isStopping() = 0;
    
    enum LayoutType {
        NormalLayout,
        Scroll
    };
    virtual void didLayout(LayoutType = NormalLayout) = 0;
    virtual void didStartOverflowScroll() = 0;
    virtual void didEndOverflowScroll() = 0;
    
    // FIXME: See <rdar://problem/5975559>
    virtual void suppressFormNotifications() = 0;
    virtual void restoreFormNotifications() = 0;

    virtual void didFlushCompositingLayers() { }

    virtual bool fetchCustomFixedPositionLayoutRect(IntRect&) { return false; }

    virtual void updateViewportConstrainedLayers(HashMap<PlatformLayer*, OwnPtr<ViewportConstraints> >&, HashMap<PlatformLayer*, PlatformLayer*>&) { }

    virtual void addOrUpdateScrollingLayer(Node*, PlatformLayer* scrollingLayer, PlatformLayer* contentsLayer, const IntSize& scrollSize, bool allowHorizontalScrollbar, bool allowVerticalScrollbar) = 0;
    virtual void removeScrollingLayer(Node*, PlatformLayer* scrollingLayer, PlatformLayer* contentsLayer) = 0;
    
    virtual void webAppOrientationsUpdated() = 0;
#endif

#if ENABLE(INPUT_TYPE_COLOR)
    virtual PassOwnPtr<ColorChooser> createColorChooser(ColorChooserClient*, const Color&) = 0;
#endif

#if !PLATFORM(IOS) && ENABLE(DATE_AND_TIME_INPUT_TYPES)
    virtual PassRefPtr<DateTimeChooser> openDateTimeChooser(DateTimeChooserClient*, const DateTimeChooserParameters&) = 0;
#endif

    virtual void runOpenPanel(Frame*, PassRefPtr<FileChooser>) = 0;
    // Asynchronous request to load an icon for specified filenames.
    virtual void loadIconForFiles(const Vector<String>&, FileIconLoader*) = 0;

#if ENABLE(DIRECTORY_UPLOAD)
    // Asychronous request to enumerate all files in a directory chosen by the user.
    virtual void enumerateChosenDirectory(FileChooser*) = 0;
#endif

    // Notification that the given form element has changed. This function
    // will be called frequently, so handling should be very fast.
    virtual void formStateDidChange(const Node*) = 0;
        
    virtual void elementDidFocus(const Node*) { };
    virtual void elementDidBlur(const Node*) { };
    
    virtual bool shouldPaintEntireContents() const { return false; }

#if USE(ACCELERATED_COMPOSITING)
    // Allows ports to customize the type of graphics layers created by this page.
    virtual GraphicsLayerFactory* graphicsLayerFactory() const { return 0; }

    // Pass 0 as the GraphicsLayer to detatch the root layer.
    virtual void attachRootGraphicsLayer(Frame*, GraphicsLayer*) = 0;
    // Sets a flag to specify that the next time content is drawn to the window,
    // the changes appear on the screen in synchrony with updates to GraphicsLayers.
    virtual void setNeedsOneShotDrawingSynchronization() = 0;
    // Sets a flag to specify that the view needs to be updated, so we need
    // to do an eager layout before the drawing.
    virtual void scheduleCompositingLayerFlush() = 0;
    // Returns whether or not the client can render the composited layer,
    // regardless of the settings.
    virtual bool allowsAcceleratedCompositing() const { return true; }

    enum CompositingTrigger {
        ThreeDTransformTrigger = 1 << 0,
        VideoTrigger = 1 << 1,
        PluginTrigger = 1 << 2,
        CanvasTrigger = 1 << 3,
        AnimationTrigger = 1 << 4,
        FilterTrigger = 1 << 5,
        ScrollableInnerFrameTrigger = 1 << 6,
        AnimatedOpacityTrigger = 1 << 7,
        AllTriggers = 0xFFFFFFFF
    };
    typedef unsigned CompositingTriggerFlags;

    // Returns a bitfield indicating conditions that can trigger the compositor.
    virtual CompositingTriggerFlags allowedCompositingTriggers() const { return static_cast<CompositingTriggerFlags>(AllTriggers); }
    
    // Returns true if layer tree updates are disabled.
    virtual bool layerTreeStateIsFrozen() const { return false; }
#endif

#if PLATFORM(WIN) && USE(AVFOUNDATION)
    virtual GraphicsDeviceAdapter* graphicsDeviceAdapter() const { return 0; }
#endif

    virtual bool supportsFullscreenForNode(const Node*) { return false; }
    virtual void enterFullscreenForNode(Node*) { }
    virtual void exitFullscreenForNode(Node*) { }
    virtual bool requiresFullscreenForVideoPlayback() { return false; } 

#if ENABLE(FULLSCREEN_API)
    virtual bool supportsFullScreenForElement(const Element*, bool) { return false; }
    virtual void enterFullScreenForElement(Element*) { }
    virtual void exitFullScreenForElement(Element*) { }
    virtual void fullScreenRendererChanged(RenderBox*) { }
    virtual void setRootFullScreenLayer(GraphicsLayer*) { }
#endif

#if USE(TILED_BACKING_STORE)
    virtual IntRect visibleRectForTiledBackingStore() const { return IntRect(); }
#endif

#if PLATFORM(MAC)
    virtual NSResponder *firstResponder() { return 0; }
    virtual void makeFirstResponder(NSResponder *) { }
    // Focuses on the containing view associated with this page.
    virtual void makeFirstResponder() { }
#endif

    virtual void enableSuddenTermination() { }
    virtual void disableSuddenTermination() { }

#if PLATFORM(WIN)
    virtual void setLastSetCursorToCurrentCursor() = 0;
    virtual void AXStartFrameLoad() = 0;
    virtual void AXFinishFrameLoad() = 0;
#endif

#if ENABLE(TOUCH_EVENTS)
    virtual void needTouchEvents(bool) = 0;
#endif

    virtual bool selectItemWritingDirectionIsNatural() = 0;
    virtual bool selectItemAlignmentFollowsMenuWritingDirection() = 0;
    // Checks if there is an opened popup, called by RenderMenuList::showPopup().
    virtual bool hasOpenedPopup() const = 0;
    virtual PassRefPtr<PopupMenu> createPopupMenu(PopupMenuClient*) const = 0;
    virtual PassRefPtr<SearchPopupMenu> createSearchPopupMenu(PopupMenuClient*) const = 0;

    virtual void postAccessibilityNotification(AccessibilityObject*, AXObjectCache::AXNotification) { }

    virtual void notifyScrollerThumbIsVisibleInRect(const IntRect&) { }
    virtual void recommendedScrollbarStyleDidChange(int /*newStyle*/) { }

    enum DialogType {
        AlertDialog = 0,
        ConfirmDialog = 1,
        PromptDialog = 2,
        HTMLDialog = 3
    };
    virtual bool shouldRunModalDialogDuringPageDismissal(const DialogType&, const String& dialogMessage, FrameLoader::PageDismissalType) const { UNUSED_PARAM(dialogMessage); return true; }

    virtual void numWheelEventHandlersChanged(unsigned) = 0;
        
    virtual bool isSVGImageChromeClient() const { return false; }

#if ENABLE(POINTER_LOCK)
    virtual bool requestPointerLock() { return false; }
    virtual void requestPointerUnlock() { }
    virtual bool isPointerLocked() { return false; }
#endif

    virtual void logDiagnosticMessage(const String& message, const String& description, const String& status) { UNUSED_PARAM(message); UNUSED_PARAM(description); UNUSED_PARAM(status); }

    virtual FloatSize minimumWindowSize() const { return FloatSize(100, 100); };

    virtual bool isEmptyChromeClient() const { return false; }

    virtual String plugInStartLabelTitle(const String& mimeType) const { UNUSED_PARAM(mimeType); return String(); }
    virtual String plugInStartLabelSubtitle(const String& mimeType) const { UNUSED_PARAM(mimeType); return String(); }
    virtual String plugInExtraStyleSheet() const { return String(); }
    virtual String plugInExtraScript() const { return String(); }

    // FIXME: Port should return true using heuristic based on scrollable(RenderBox).
    virtual bool shouldAutoscrollForDragAndDrop(RenderBox*) const { return false; }

    virtual void didAssociateFormControls(const Vector<RefPtr<Element> >&) { };
    virtual bool shouldNotifyOnFormChanges() { return false; };

    virtual void didAddHeaderLayer(GraphicsLayer*) { }
    virtual void didAddFooterLayer(GraphicsLayer*) { }

    // These methods are used to report pages that are performing
    // some task that we consider to be "active", and so the user
    // would likely want the page to remain running uninterrupted.
    virtual void incrementActivePageCount() { }
    virtual void decrementActivePageCount() { }

protected:
    virtual ~ChromeClient() { }
};

}
#endif // ChromeClient_h