forked from mirrors/gecko-dev
240 lines
8.9 KiB
C++
240 lines
8.9 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/* vim: set ts=4 et sw=4 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef nsDragService_h__
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#define nsDragService_h__
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#include "mozilla/RefPtr.h"
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#include "nsBaseDragService.h"
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#include "nsIObserver.h"
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#include "nsAutoRef.h"
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#include <gtk/gtk.h>
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class nsWindow;
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class nsWaylandDragContext;
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namespace mozilla {
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namespace gfx {
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class SourceSurface;
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}
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}
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#ifndef HAVE_NSGOBJECTREFTRAITS
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#define HAVE_NSGOBJECTREFTRAITS
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template <class T>
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class nsGObjectRefTraits : public nsPointerRefTraits<T> {
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public:
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static void Release(T *aPtr) { g_object_unref(aPtr); }
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static void AddRef(T *aPtr) { g_object_ref(aPtr); }
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};
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#endif
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#ifndef HAVE_NSAUTOREFTRAITS_GTKWIDGET
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#define HAVE_NSAUTOREFTRAITS_GTKWIDGET
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template <>
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class nsAutoRefTraits<GtkWidget> : public nsGObjectRefTraits<GtkWidget> { };
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#endif
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#ifndef HAVE_NSAUTOREFTRAITS_GDKDRAGCONTEXT
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#define HAVE_NSAUTOREFTRAITS_GDKDRAGCONTEXT
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template <>
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class nsAutoRefTraits<GdkDragContext> :
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public nsGObjectRefTraits<GdkDragContext> { };
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#endif
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/**
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* Native GTK DragService wrapper
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*/
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class nsDragService final : public nsBaseDragService,
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public nsIObserver
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{
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public:
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nsDragService();
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NS_DECL_ISUPPORTS_INHERITED
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NS_DECL_NSIOBSERVER
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// nsBaseDragService
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virtual nsresult InvokeDragSessionImpl(nsIArray* anArrayTransferables,
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const mozilla::Maybe<mozilla::CSSIntRegion>& aRegion,
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uint32_t aActionType) override;
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// nsIDragService
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NS_IMETHOD InvokeDragSession (nsINode *aDOMNode,
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const nsACString& aPrincipalURISpec,
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nsIArray * anArrayTransferables,
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uint32_t aActionType,
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nsContentPolicyType aContentPolicyType) override;
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NS_IMETHOD StartDragSession() override;
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NS_IMETHOD EndDragSession(bool aDoneDrag, uint32_t aKeyModifiers) override;
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// nsIDragSession
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NS_IMETHOD SetCanDrop (bool aCanDrop) override;
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NS_IMETHOD GetCanDrop (bool *aCanDrop) override;
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NS_IMETHOD GetNumDropItems (uint32_t * aNumItems) override;
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NS_IMETHOD GetData (nsITransferable * aTransferable,
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uint32_t aItemIndex) override;
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NS_IMETHOD IsDataFlavorSupported (const char *aDataFlavor,
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bool *_retval) override;
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NS_IMETHOD UpdateDragEffect() override;
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// Methods called from nsWindow to handle responding to GTK drag
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// destination signals
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static already_AddRefed<nsDragService> GetInstance();
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void TargetDataReceived (GtkWidget *aWidget,
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GdkDragContext *aContext,
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gint aX,
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gint aY,
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GtkSelectionData *aSelection_data,
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guint aInfo,
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guint32 aTime);
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gboolean ScheduleMotionEvent(nsWindow *aWindow,
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GdkDragContext *aDragContext,
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nsWaylandDragContext* aPendingWaylandDragContext,
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mozilla::LayoutDeviceIntPoint aWindowPoint,
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guint aTime);
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void ScheduleLeaveEvent();
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gboolean ScheduleDropEvent(nsWindow *aWindow,
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GdkDragContext *aDragContext,
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nsWaylandDragContext* aPendingWaylandDragContext,
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mozilla::LayoutDeviceIntPoint aWindowPoint,
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guint aTime);
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nsWindow* GetMostRecentDestWindow()
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{
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return mScheduledTask == eDragTaskNone ? mTargetWindow
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: mPendingWindow;
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}
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// END PUBLIC API
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// These methods are public only so that they can be called from functions
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// with C calling conventions. They are called for drags started with the
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// invisible widget.
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void SourceEndDragSession(GdkDragContext *aContext,
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gint aResult);
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void SourceDataGet(GtkWidget *widget,
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GdkDragContext *context,
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GtkSelectionData *selection_data,
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guint32 aTime);
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// set the drag icon during drag-begin
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void SetDragIcon(GdkDragContext* aContext);
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protected:
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virtual ~nsDragService();
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private:
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// mScheduledTask indicates what signal has been received from GTK and
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// so what needs to be dispatched when the scheduled task is run. It is
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// eDragTaskNone when there is no task scheduled (but the
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// previous task may still not have finished running).
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enum DragTask {
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eDragTaskNone,
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eDragTaskMotion,
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eDragTaskLeave,
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eDragTaskDrop,
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eDragTaskSourceEnd
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};
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DragTask mScheduledTask;
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// mTaskSource is the GSource id for the task that is either scheduled
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// or currently running. It is 0 if no task is scheduled or running.
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guint mTaskSource;
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// target/destination side vars
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// These variables keep track of the state of the current drag.
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// mPendingWindow, mPendingWindowPoint, mPendingDragContext, and
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// mPendingTime, carry information from the GTK signal that will be used
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// when the scheduled task is run. mPendingWindow and mPendingDragContext
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// will be nullptr if the scheduled task is eDragTaskLeave.
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RefPtr<nsWindow> mPendingWindow;
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mozilla::LayoutDeviceIntPoint mPendingWindowPoint;
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nsCountedRef<GdkDragContext> mPendingDragContext;
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#ifdef MOZ_WAYLAND
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RefPtr<nsWaylandDragContext> mPendingWaylandDragContext;
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#endif
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guint mPendingTime;
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// mTargetWindow and mTargetWindowPoint record the position of the last
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// eDragTaskMotion or eDragTaskDrop task that was run or is still running.
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// mTargetWindow is cleared once the drag has completed or left.
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RefPtr<nsWindow> mTargetWindow;
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mozilla::LayoutDeviceIntPoint mTargetWindowPoint;
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// mTargetWidget and mTargetDragContext are set only while dispatching
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// motion or drop events. mTime records the corresponding timestamp.
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nsCountedRef<GtkWidget> mTargetWidget;
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nsCountedRef<GdkDragContext> mTargetDragContext;
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#ifdef MOZ_WAYLAND
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RefPtr<nsWaylandDragContext> mTargetWaylandDragContext;
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#endif
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// mTargetDragContextForRemote is set while waiting for a reply from
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// a child process.
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nsCountedRef<GdkDragContext> mTargetDragContextForRemote;
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#ifdef MOZ_WAYLAND
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RefPtr<nsWaylandDragContext> mTargetWaylandDragContextForRemote;
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#endif
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guint mTargetTime;
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// is it OK to drop on us?
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bool mCanDrop;
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// have we received our drag data?
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bool mTargetDragDataReceived;
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// last data received and its length
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void *mTargetDragData;
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uint32_t mTargetDragDataLen;
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// is the current target drag context contain a list?
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bool IsTargetContextList(void);
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// this will get the native data from the last target given a
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// specific flavor
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void GetTargetDragData(GdkAtom aFlavor);
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// this will reset all of the target vars
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void TargetResetData(void);
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// source side vars
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// the source of our drags
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GtkWidget *mHiddenWidget;
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// our source data items
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nsCOMPtr<nsIArray> mSourceDataItems;
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// get a list of the sources in gtk's format
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GtkTargetList *GetSourceList(void);
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// attempts to create a semi-transparent drag image. Returns TRUE if
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// successful, FALSE if not
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bool SetAlphaPixmap(SourceSurface *aPixbuf,
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GdkDragContext *aContext,
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int32_t aXOffset,
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int32_t aYOffset,
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const mozilla::LayoutDeviceIntRect &dragRect);
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gboolean Schedule(DragTask aTask, nsWindow *aWindow,
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GdkDragContext *aDragContext,
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nsWaylandDragContext* aPendingWaylandDragContext,
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mozilla::LayoutDeviceIntPoint aWindowPoint, guint aTime);
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// Callback for g_idle_add_full() to run mScheduledTask.
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static gboolean TaskDispatchCallback(gpointer data);
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gboolean RunScheduledTask();
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void UpdateDragAction();
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void DispatchMotionEvents();
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void ReplyToDragMotion(GdkDragContext* aDragContext);
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#ifdef MOZ_WAYLAND
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void ReplyToDragMotion(nsWaylandDragContext* aDragContext);
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#endif
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gboolean DispatchDropEvent();
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static uint32_t GetCurrentModifiers();
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};
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#endif // nsDragService_h__
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