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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 19:33:14 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 19:33:14 +0000
commit36d22d82aa202bb199967e9512281e9a53db42c9 (patch)
tree105e8c98ddea1c1e4784a60a5a6410fa416be2de /widget/gtk/nsDragService.cpp
parentInitial commit. (diff)
downloadfirefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.tar.xz
firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.zip
Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'widget/gtk/nsDragService.cpp')
-rw-r--r--widget/gtk/nsDragService.cpp2658
1 files changed, 2658 insertions, 0 deletions
diff --git a/widget/gtk/nsDragService.cpp b/widget/gtk/nsDragService.cpp
new file mode 100644
index 0000000000..a650799506
--- /dev/null
+++ b/widget/gtk/nsDragService.cpp
@@ -0,0 +1,2658 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=4 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "nsDragService.h"
+#include "nsArrayUtils.h"
+#include "nsIObserverService.h"
+#include "nsWidgetsCID.h"
+#include "nsWindow.h"
+#include "nsSystemInfo.h"
+#include "nsXPCOM.h"
+#include "nsICookieJarSettings.h"
+#include "nsISupportsPrimitives.h"
+#include "nsIIOService.h"
+#include "nsIFileURL.h"
+#include "nsNetUtil.h"
+#include "mozilla/Logging.h"
+#include "nsTArray.h"
+#include "nsPrimitiveHelpers.h"
+#include "prtime.h"
+#include "prthread.h"
+#include <dlfcn.h>
+#include <gtk/gtk.h>
+#include "nsCRT.h"
+#include "mozilla/BasicEvents.h"
+#include "mozilla/Services.h"
+#include "mozilla/ClearOnShutdown.h"
+#include "mozilla/PresShell.h"
+#include "mozilla/ScopeExit.h"
+#include "mozilla/AutoRestore.h"
+#include "mozilla/WidgetUtilsGtk.h"
+#include "GRefPtr.h"
+#include "nsAppShell.h"
+
+#ifdef MOZ_X11
+# include "gfxXlibSurface.h"
+#endif
+#include "gfxContext.h"
+#include "nsImageToPixbuf.h"
+#include "nsPresContext.h"
+#include "nsIContent.h"
+#include "mozilla/dom/Document.h"
+#include "nsViewManager.h"
+#include "nsIFrame.h"
+#include "nsGtkUtils.h"
+#include "nsGtkKeyUtils.h"
+#include "mozilla/gfx/2D.h"
+#include "gfxPlatform.h"
+#include "ScreenHelperGTK.h"
+#include "nsArrayUtils.h"
+#include "nsStringStream.h"
+#include "nsDirectoryService.h"
+#include "nsDirectoryServiceDefs.h"
+#include "nsEscape.h"
+#include "nsString.h"
+
+using namespace mozilla;
+using namespace mozilla::gfx;
+
+// The maximum time to wait for a "drag_received" arrived in microseconds.
+#define NS_DND_TIMEOUT 1000000
+
+// The maximum time to wait before temporary files resulting
+// from drag'n'drop events will be removed in miliseconds.
+// It's set to 5 min as the file has to be present some time after drop
+// event to give target application time to get the data.
+// (A target application can throw a dialog to ask user what to do with
+// the data and will access the tmp file after user action.)
+#define NS_DND_TMP_CLEANUP_TIMEOUT (1000 * 60 * 5)
+
+#define NS_SYSTEMINFO_CONTRACTID "@mozilla.org/system-info;1"
+
+// This sets how opaque the drag image is
+#define DRAG_IMAGE_ALPHA_LEVEL 0.5
+
+#ifdef MOZ_LOGGING
+extern mozilla::LazyLogModule gWidgetDragLog;
+# define LOGDRAGSERVICE(str, ...) \
+ MOZ_LOG(gWidgetDragLog, mozilla::LogLevel::Debug, \
+ ("[Depth %d]: " str, GetLoopDepth(), ##__VA_ARGS__))
+# define LOGDRAGSERVICESTATIC(str, ...) \
+ MOZ_LOG(gWidgetDragLog, mozilla::LogLevel::Debug, (str, ##__VA_ARGS__))
+#else
+# define LOGDRAGSERVICE(...)
+#endif
+
+// Helper class to block native events processing.
+class MOZ_STACK_CLASS AutoSuspendNativeEvents {
+ public:
+ AutoSuspendNativeEvents() {
+ mAppShell = do_GetService(NS_APPSHELL_CID);
+ mAppShell->SuspendNative();
+ }
+ ~AutoSuspendNativeEvents() { mAppShell->ResumeNative(); }
+
+ private:
+ nsCOMPtr<nsIAppShell> mAppShell;
+};
+
+// data used for synthetic periodic motion events sent to the source widget
+// grabbing real events for the drag.
+static guint sMotionEventTimerID;
+
+static GdkEvent* sMotionEvent;
+static GUniquePtr<GdkEvent> TakeMotionEvent() {
+ GUniquePtr<GdkEvent> event(sMotionEvent);
+ sMotionEvent = nullptr;
+ return event;
+}
+static void SetMotionEvent(GUniquePtr<GdkEvent> aEvent) {
+ TakeMotionEvent();
+ sMotionEvent = aEvent.release();
+}
+
+static GtkWidget* sGrabWidget;
+
+static constexpr nsLiteralString kDisallowedExportedSchemes[] = {
+ u"about"_ns, u"blob"_ns, u"chrome"_ns, u"imap"_ns,
+ u"javascript"_ns, u"mailbox"_ns, u"moz-anno"_ns, u"news"_ns,
+ u"page-icon"_ns, u"resource"_ns, u"view-source"_ns, u"moz-extension"_ns,
+};
+
+// _NETSCAPE_URL is similar to text/uri-list type.
+// Format is UTF8: URL + "\n" + title.
+// While text/uri-list tells target application to fetch, copy and store data
+// from URL, _NETSCAPE_URL suggest to create a link to the target.
+// Also _NETSCAPE_URL points to only one item while text/uri-list can point to
+// multiple ones.
+static const char gMozUrlType[] = "_NETSCAPE_URL";
+static const char gMimeListType[] = "application/x-moz-internal-item-list";
+static const char gTextUriListType[] = "text/uri-list";
+static const char gTextPlainUTF8Type[] = "text/plain;charset=utf-8";
+static const char gXdndDirectSaveType[] = "XdndDirectSave0";
+static const char gTabDropType[] = "application/x-moz-tabbrowser-tab";
+
+// See https://docs.gtk.org/gtk3/enum.DragResult.html
+static const char kGtkDragResults[][100]{
+ "GTK_DRAG_RESULT_SUCCESS", "GTK_DRAG_RESULT_NO_TARGET",
+ "GTK_DRAG_RESULT_USER_CANCELLED", "GTK_DRAG_RESULT_TIMEOUT_EXPIRED",
+ "GTK_DRAG_RESULT_GRAB_BROKEN", "GTK_DRAG_RESULT_ERROR"};
+
+static void invisibleSourceDragBegin(GtkWidget* aWidget,
+ GdkDragContext* aContext, gpointer aData);
+
+static void invisibleSourceDragEnd(GtkWidget* aWidget, GdkDragContext* aContext,
+ gpointer aData);
+
+static gboolean invisibleSourceDragFailed(GtkWidget* aWidget,
+ GdkDragContext* aContext,
+ gint aResult, gpointer aData);
+
+static void invisibleSourceDragDataGet(GtkWidget* aWidget,
+ GdkDragContext* aContext,
+ GtkSelectionData* aSelectionData,
+ guint aInfo, guint32 aTime,
+ gpointer aData);
+
+nsDragService::nsDragService()
+ : mScheduledTask(eDragTaskNone),
+ mTaskSource(0),
+ mScheduledTaskIsRunning(false),
+ mCachedDragContext() {
+ // We have to destroy the hidden widget before the event loop stops
+ // running.
+ nsCOMPtr<nsIObserverService> obsServ =
+ mozilla::services::GetObserverService();
+ obsServ->AddObserver(this, "quit-application", false);
+
+ // our hidden source widget
+ // Using an offscreen window works around bug 983843.
+ mHiddenWidget = gtk_offscreen_window_new();
+ // make sure that the widget is realized so that
+ // we can use it as a drag source.
+ gtk_widget_realize(mHiddenWidget);
+ // hook up our internal signals so that we can get some feedback
+ // from our drag source
+ g_signal_connect(mHiddenWidget, "drag_begin",
+ G_CALLBACK(invisibleSourceDragBegin), this);
+ g_signal_connect(mHiddenWidget, "drag_data_get",
+ G_CALLBACK(invisibleSourceDragDataGet), this);
+ g_signal_connect(mHiddenWidget, "drag_end",
+ G_CALLBACK(invisibleSourceDragEnd), this);
+ // drag-failed is available from GTK+ version 2.12
+ guint dragFailedID =
+ g_signal_lookup("drag-failed", G_TYPE_FROM_INSTANCE(mHiddenWidget));
+ if (dragFailedID) {
+ g_signal_connect_closure_by_id(
+ mHiddenWidget, dragFailedID, 0,
+ g_cclosure_new(G_CALLBACK(invisibleSourceDragFailed), this, nullptr),
+ FALSE);
+ }
+
+ // set up our logging module
+ mCanDrop = false;
+ mTargetDragDataReceived = false;
+ mTargetDragData = 0;
+ mTargetDragDataLen = 0;
+ mTempFileTimerID = 0;
+ mEventLoopDepth = 0;
+ LOGDRAGSERVICE("nsDragService::nsDragService");
+}
+
+nsDragService::~nsDragService() {
+ LOGDRAGSERVICE("nsDragService::~nsDragService");
+ if (mTaskSource) g_source_remove(mTaskSource);
+ if (mTempFileTimerID) {
+ g_source_remove(mTempFileTimerID);
+ RemoveTempFiles();
+ }
+}
+
+NS_IMPL_ISUPPORTS_INHERITED(nsDragService, nsBaseDragService, nsIObserver)
+
+mozilla::StaticRefPtr<nsDragService> sDragServiceInstance;
+/* static */
+already_AddRefed<nsDragService> nsDragService::GetInstance() {
+ if (gfxPlatform::IsHeadless()) {
+ return nullptr;
+ }
+ if (!sDragServiceInstance) {
+ sDragServiceInstance = new nsDragService();
+ ClearOnShutdown(&sDragServiceInstance);
+ }
+
+ RefPtr<nsDragService> service = sDragServiceInstance.get();
+ return service.forget();
+}
+
+// nsIObserver
+
+NS_IMETHODIMP
+nsDragService::Observe(nsISupports* aSubject, const char* aTopic,
+ const char16_t* aData) {
+ if (!nsCRT::strcmp(aTopic, "quit-application")) {
+ LOGDRAGSERVICE("nsDragService::Observe(\"quit-application\")");
+ if (mHiddenWidget) {
+ gtk_widget_destroy(mHiddenWidget);
+ mHiddenWidget = 0;
+ }
+ TargetResetData();
+ } else {
+ MOZ_ASSERT_UNREACHABLE("unexpected topic");
+ return NS_ERROR_UNEXPECTED;
+ }
+
+ return NS_OK;
+}
+
+// Support for periodic drag events
+
+// http://www.whatwg.org/specs/web-apps/current-work/multipage/dnd.html#drag-and-drop-processing-model
+// and the Xdnd protocol both recommend that drag events are sent periodically,
+// but GTK does not normally provide this.
+//
+// Here GTK is periodically stimulated by copies of the most recent mouse
+// motion events so as to send drag position messages to the destination when
+// appropriate (after it has received a status event from the previous
+// message).
+//
+// (If events were sent only on the destination side then the destination
+// would have no message to which it could reply with a drag status. Without
+// sending a drag status to the source, the destination would not be able to
+// change its feedback re whether it could accept the drop, and so the
+// source's behavior on drop will not be consistent.)
+
+static gboolean DispatchMotionEventCopy(gpointer aData) {
+ // Clear the timer id before OnSourceGrabEventAfter is called during event
+ // dispatch.
+ sMotionEventTimerID = 0;
+
+ GUniquePtr<GdkEvent> event = TakeMotionEvent();
+ // If there is no longer a grab on the widget, then the drag is over and
+ // there is no need to continue drag motion.
+ if (gtk_widget_has_grab(sGrabWidget)) {
+ gtk_propagate_event(sGrabWidget, event.get());
+ }
+
+ // Cancel this timer;
+ // We've already started another if the motion event was dispatched.
+ return FALSE;
+}
+
+static void OnSourceGrabEventAfter(GtkWidget* widget, GdkEvent* event,
+ gpointer user_data) {
+ // If there is no longer a grab on the widget, then the drag motion is
+ // over (though the data may not be fetched yet).
+ if (!gtk_widget_has_grab(sGrabWidget)) return;
+
+ if (event->type == GDK_MOTION_NOTIFY) {
+ SetMotionEvent(GUniquePtr<GdkEvent>(gdk_event_copy(event)));
+
+ // Update the cursor position. The last of these recorded gets used for
+ // the eDragEnd event.
+ nsDragService* dragService = static_cast<nsDragService*>(user_data);
+ gint scale = mozilla::widget::ScreenHelperGTK::GetGTKMonitorScaleFactor();
+ auto p = LayoutDeviceIntPoint::Round(event->motion.x_root * scale,
+ event->motion.y_root * scale);
+ dragService->SetDragEndPoint(p);
+ } else if (sMotionEvent &&
+ (event->type == GDK_KEY_PRESS || event->type == GDK_KEY_RELEASE)) {
+ // Update modifier state from key events.
+ sMotionEvent->motion.state = event->key.state;
+ } else {
+ return;
+ }
+
+ if (sMotionEventTimerID) {
+ g_source_remove(sMotionEventTimerID);
+ }
+
+ // G_PRIORITY_DEFAULT_IDLE is lower priority than GDK's redraw idle source
+ // and lower than GTK's idle source that sends drag position messages after
+ // motion-notify signals.
+ //
+ // http://www.whatwg.org/specs/web-apps/current-work/multipage/dnd.html#drag-and-drop-processing-model
+ // recommends an interval of 350ms +/- 200ms.
+ sMotionEventTimerID = g_timeout_add_full(
+ G_PRIORITY_DEFAULT_IDLE, 350, DispatchMotionEventCopy, nullptr, nullptr);
+}
+
+static GtkWindow* GetGtkWindow(dom::Document* aDocument) {
+ if (!aDocument) return nullptr;
+
+ PresShell* presShell = aDocument->GetPresShell();
+ if (!presShell) {
+ return nullptr;
+ }
+
+ RefPtr<nsViewManager> vm = presShell->GetViewManager();
+ if (!vm) return nullptr;
+
+ nsCOMPtr<nsIWidget> widget = vm->GetRootWidget();
+ if (!widget) return nullptr;
+
+ GtkWidget* gtkWidget = static_cast<nsWindow*>(widget.get())->GetGtkWidget();
+ if (!gtkWidget) return nullptr;
+
+ GtkWidget* toplevel = nullptr;
+ toplevel = gtk_widget_get_toplevel(gtkWidget);
+ if (!GTK_IS_WINDOW(toplevel)) return nullptr;
+
+ return GTK_WINDOW(toplevel);
+}
+
+// nsIDragService
+
+NS_IMETHODIMP
+nsDragService::InvokeDragSession(
+ nsINode* aDOMNode, nsIPrincipal* aPrincipal, nsIContentSecurityPolicy* aCsp,
+ nsICookieJarSettings* aCookieJarSettings, nsIArray* aArrayTransferables,
+ uint32_t aActionType,
+ nsContentPolicyType aContentPolicyType = nsIContentPolicy::TYPE_OTHER) {
+ LOGDRAGSERVICE("nsDragService::InvokeDragSession");
+
+ // If the previous source drag has not yet completed, signal handlers need
+ // to be removed from sGrabWidget and dragend needs to be dispatched to
+ // the source node, but we can't call EndDragSession yet because we don't
+ // know whether or not the drag succeeded.
+ if (mSourceNode) return NS_ERROR_NOT_AVAILABLE;
+
+ return nsBaseDragService::InvokeDragSession(
+ aDOMNode, aPrincipal, aCsp, aCookieJarSettings, aArrayTransferables,
+ aActionType, aContentPolicyType);
+}
+
+// nsBaseDragService
+nsresult nsDragService::InvokeDragSessionImpl(
+ nsIArray* aArrayTransferables, const Maybe<CSSIntRegion>& aRegion,
+ uint32_t aActionType) {
+ // make sure that we have an array of transferables to use
+ if (!aArrayTransferables) return NS_ERROR_INVALID_ARG;
+ // set our reference to the transferables. this will also addref
+ // the transferables since we're going to hang onto this beyond the
+ // length of this call
+ mSourceDataItems = aArrayTransferables;
+
+ LOGDRAGSERVICE("nsDragService::InvokeDragSessionImpl");
+
+ // get the list of items we offer for drags
+ GtkTargetList* sourceList = GetSourceList();
+
+ if (!sourceList) return NS_OK;
+
+ // save our action type
+ GdkDragAction action = GDK_ACTION_DEFAULT;
+
+ if (aActionType & DRAGDROP_ACTION_COPY)
+ action = (GdkDragAction)(action | GDK_ACTION_COPY);
+ if (aActionType & DRAGDROP_ACTION_MOVE)
+ action = (GdkDragAction)(action | GDK_ACTION_MOVE);
+ if (aActionType & DRAGDROP_ACTION_LINK)
+ action = (GdkDragAction)(action | GDK_ACTION_LINK);
+
+ GdkEvent* existingEvent = widget::GetLastMousePressEvent();
+ GdkEvent fakeEvent;
+ if (!existingEvent) {
+ // Create a fake event for the drag so we can pass the time (so to speak).
+ // If we don't do this, then, when the timestamp for the pending button
+ // release event is used for the ungrab, the ungrab can fail due to the
+ // timestamp being _earlier_ than CurrentTime.
+ memset(&fakeEvent, 0, sizeof(GdkEvent));
+ fakeEvent.type = GDK_BUTTON_PRESS;
+ fakeEvent.button.window = gtk_widget_get_window(mHiddenWidget);
+ fakeEvent.button.time = nsWindow::GetLastUserInputTime();
+ fakeEvent.button.device = widget::GdkGetPointer();
+ }
+
+ // Put the drag widget in the window group of the source node so that the
+ // gtk_grab_add during gtk_drag_begin is effective.
+ // gtk_window_get_group(nullptr) returns the default window group.
+ GtkWindowGroup* window_group =
+ gtk_window_get_group(GetGtkWindow(mSourceDocument));
+ gtk_window_group_add_window(window_group, GTK_WINDOW(mHiddenWidget));
+
+ // start our drag.
+ GdkDragContext* context = gtk_drag_begin_with_coordinates(
+ mHiddenWidget, sourceList, action, 1,
+ existingEvent ? existingEvent : &fakeEvent, -1, -1);
+
+ if (widget::GdkIsWaylandDisplay() || widget::IsXWaylandProtocol()) {
+ GdkDevice* device = gdk_drag_context_get_device(context);
+ GdkWindow* gdkWindow =
+ gdk_device_get_window_at_position(device, nullptr, nullptr);
+ mSourceWindow = nsWindow::GetWindow(gdkWindow);
+ if (mSourceWindow) {
+ mSourceWindow->SetDragSource(context);
+ }
+ }
+
+ LOGDRAGSERVICE(" GdkDragContext [%p] nsWindow [%p]", context,
+ mSourceWindow.get());
+
+ nsresult rv;
+ if (context) {
+ StartDragSession();
+
+ // GTK uses another hidden window for receiving mouse events.
+ sGrabWidget = gtk_window_group_get_current_grab(window_group);
+ if (sGrabWidget) {
+ g_object_ref(sGrabWidget);
+ // Only motion and key events are required but connect to
+ // "event-after" as this is never blocked by other handlers.
+ g_signal_connect(sGrabWidget, "event-after",
+ G_CALLBACK(OnSourceGrabEventAfter), this);
+ }
+ // We don't have a drag end point yet.
+ mEndDragPoint = LayoutDeviceIntPoint(-1, -1);
+ rv = NS_OK;
+ } else {
+ rv = NS_ERROR_FAILURE;
+ }
+
+ gtk_target_list_unref(sourceList);
+
+ return rv;
+}
+
+bool nsDragService::SetAlphaPixmap(SourceSurface* aSurface,
+ GdkDragContext* aContext, int32_t aXOffset,
+ int32_t aYOffset,
+ const LayoutDeviceIntRect& dragRect) {
+ GdkScreen* screen = gtk_widget_get_screen(mHiddenWidget);
+
+ // Transparent drag icons need, like a lot of transparency-related things,
+ // a compositing X window manager
+ if (!gdk_screen_is_composited(screen)) {
+ return false;
+ }
+
+#ifdef cairo_image_surface_create
+# error "Looks like we're including Mozilla's cairo instead of system cairo"
+#endif
+
+ // TODO: grab X11 pixmap or image data instead of expensive readback.
+ cairo_surface_t* surf = cairo_image_surface_create(
+ CAIRO_FORMAT_ARGB32, dragRect.width, dragRect.height);
+ if (!surf) return false;
+
+ RefPtr<DrawTarget> dt = gfxPlatform::CreateDrawTargetForData(
+ cairo_image_surface_get_data(surf),
+ nsIntSize(dragRect.width, dragRect.height),
+ cairo_image_surface_get_stride(surf), SurfaceFormat::B8G8R8A8);
+ if (!dt) return false;
+
+ dt->ClearRect(Rect(0, 0, dragRect.width, dragRect.height));
+ dt->DrawSurface(
+ aSurface, Rect(0, 0, dragRect.width, dragRect.height),
+ Rect(0, 0, dragRect.width, dragRect.height), DrawSurfaceOptions(),
+ DrawOptions(DRAG_IMAGE_ALPHA_LEVEL, CompositionOp::OP_SOURCE));
+
+ cairo_surface_mark_dirty(surf);
+ cairo_surface_set_device_offset(surf, -aXOffset, -aYOffset);
+
+ // Ensure that the surface is drawn at the correct scale on HiDPI displays.
+ static auto sCairoSurfaceSetDeviceScalePtr =
+ (void (*)(cairo_surface_t*, double, double))dlsym(
+ RTLD_DEFAULT, "cairo_surface_set_device_scale");
+ if (sCairoSurfaceSetDeviceScalePtr) {
+ gint scale = mozilla::widget::ScreenHelperGTK::GetGTKMonitorScaleFactor();
+ sCairoSurfaceSetDeviceScalePtr(surf, scale, scale);
+ }
+
+ gtk_drag_set_icon_surface(aContext, surf);
+ cairo_surface_destroy(surf);
+ return true;
+}
+
+NS_IMETHODIMP
+nsDragService::StartDragSession() {
+ LOGDRAGSERVICE("nsDragService::StartDragSession");
+ mTempFileUrls.Clear();
+ return nsBaseDragService::StartDragSession();
+}
+
+bool nsDragService::RemoveTempFiles() {
+ LOGDRAGSERVICE("nsDragService::RemoveTempFiles");
+
+ // We can not delete the temporary files immediately after the
+ // drag has finished, because the target application might have not
+ // copied the temporary file yet. The Qt toolkit does not provide a
+ // way to mark a drop as finished in an asynchronous way, so most
+ // Qt based applications do send the dnd_finished signal before they
+ // have actually accessed the data from the temporary file.
+ // (https://bugreports.qt.io/browse/QTBUG-5441)
+ //
+ // To work also with these applications we collect all temporary
+ // files in mTemporaryFiles array and remove them here in the timer event.
+ auto files = std::move(mTemporaryFiles);
+ for (nsIFile* file : files) {
+#ifdef MOZ_LOGGING
+ if (MOZ_LOG_TEST(gWidgetDragLog, LogLevel::Debug)) {
+ nsAutoCString path;
+ if (NS_SUCCEEDED(file->GetNativePath(path))) {
+ LOGDRAGSERVICE(" removing %s", path.get());
+ }
+ }
+#endif
+ file->Remove(/* recursive = */ true);
+ }
+ MOZ_ASSERT(mTemporaryFiles.IsEmpty());
+ mTempFileTimerID = 0;
+ // Return false to remove the timer added by g_timeout_add_full().
+ return false;
+}
+
+gboolean nsDragService::TaskRemoveTempFiles(gpointer data) {
+ RefPtr<nsDragService> dragService = static_cast<nsDragService*>(data);
+ return dragService->RemoveTempFiles();
+}
+
+NS_IMETHODIMP
+nsDragService::EndDragSession(bool aDoneDrag, uint32_t aKeyModifiers) {
+ LOGDRAGSERVICE("nsDragService::EndDragSession(%p) %d",
+ mTargetDragContext.get(), aDoneDrag);
+
+ if (sGrabWidget) {
+ g_signal_handlers_disconnect_by_func(
+ sGrabWidget, FuncToGpointer(OnSourceGrabEventAfter), this);
+ g_object_unref(sGrabWidget);
+ sGrabWidget = nullptr;
+
+ if (sMotionEventTimerID) {
+ g_source_remove(sMotionEventTimerID);
+ sMotionEventTimerID = 0;
+ }
+ if (sMotionEvent) {
+ TakeMotionEvent();
+ }
+ }
+
+ // unset our drag action
+ SetDragAction(DRAGDROP_ACTION_NONE);
+
+ // start timer to remove temporary files
+ if (mTemporaryFiles.Count() > 0 && !mTempFileTimerID) {
+ LOGDRAGSERVICE(" queue removing of temporary files");
+ // |this| won't be used after nsDragService delete because the timer is
+ // removed in the nsDragService destructor.
+ mTempFileTimerID =
+ g_timeout_add(NS_DND_TMP_CLEANUP_TIMEOUT, TaskRemoveTempFiles, this);
+ mTempFileUrls.Clear();
+ }
+
+ // We're done with the drag context.
+ if (mSourceWindow) {
+ mSourceWindow->SetDragSource(nullptr);
+ mSourceWindow = nullptr;
+ }
+ mTargetDragContextForRemote = nullptr;
+ mTargetWindow = nullptr;
+ mPendingWindow = nullptr;
+ mCachedDragContext = 0;
+
+ return nsBaseDragService::EndDragSession(aDoneDrag, aKeyModifiers);
+}
+
+// nsIDragSession
+NS_IMETHODIMP
+nsDragService::SetCanDrop(bool aCanDrop) {
+ LOGDRAGSERVICE("nsDragService::SetCanDrop %d", aCanDrop);
+ mCanDrop = aCanDrop;
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+nsDragService::GetCanDrop(bool* aCanDrop) {
+ LOGDRAGSERVICE("nsDragService::GetCanDrop");
+ *aCanDrop = mCanDrop;
+ return NS_OK;
+}
+
+static void UTF16ToNewUTF8(const char16_t* aUTF16, uint32_t aUTF16Len,
+ char** aUTF8, uint32_t* aUTF8Len) {
+ nsDependentSubstring utf16(aUTF16, aUTF16Len);
+ *aUTF8 = ToNewUTF8String(utf16, aUTF8Len);
+}
+
+static void UTF8ToNewUTF16(const char* aUTF8, uint32_t aUTF8Len,
+ char16_t** aUTF16, uint32_t* aUTF16Len) {
+ nsDependentCSubstring utf8(aUTF8, aUTF8Len);
+ *aUTF16 = UTF8ToNewUnicode(utf8, aUTF16Len);
+}
+
+// count the number of URIs in some text/uri-list format data.
+static uint32_t CountTextUriListItems(const char* data, uint32_t datalen) {
+ const char* p = data;
+ const char* endPtr = p + datalen;
+ uint32_t count = 0;
+
+ while (p < endPtr) {
+ // skip whitespace (if any)
+ while (p < endPtr && *p != '\0' && isspace(*p)) p++;
+ // if we aren't at the end of the line ...
+ if (p != endPtr && *p != '\0' && *p != '\n' && *p != '\r') count++;
+ // skip to the end of the line
+ while (p < endPtr && *p != '\0' && *p != '\n') p++;
+ p++; // skip the actual newline as well.
+ }
+ return count;
+}
+
+// extract an item from text/uri-list formatted data and convert it to
+// unicode.
+static void GetTextUriListItem(const char* data, uint32_t datalen,
+ uint32_t aItemIndex, char16_t** convertedText,
+ uint32_t* convertedTextLen) {
+ const char* p = data;
+ const char* endPtr = p + datalen;
+ unsigned int count = 0;
+
+ *convertedText = nullptr;
+ while (p < endPtr) {
+ // skip whitespace (if any)
+ while (p < endPtr && *p != '\0' && isspace(*p)) p++;
+ // if we aren't at the end of the line, we have a url
+ if (p != endPtr && *p != '\0' && *p != '\n' && *p != '\r') count++;
+ // this is the item we are after ...
+ if (aItemIndex + 1 == count) {
+ const char* q = p;
+ while (q < endPtr && *q != '\0' && *q != '\n' && *q != '\r') q++;
+ UTF8ToNewUTF16(p, q - p, convertedText, convertedTextLen);
+ break;
+ }
+ // skip to the end of the line
+ while (p < endPtr && *p != '\0' && *p != '\n') p++;
+ p++; // skip the actual newline as well.
+ }
+
+ // didn't find the desired item, so just pass the whole lot
+ if (!*convertedText) {
+ UTF8ToNewUTF16(data, datalen, convertedText, convertedTextLen);
+ }
+}
+
+// Spins event loop, called from JS.
+// Can lead to another round of drag_motion events.
+NS_IMETHODIMP
+nsDragService::GetNumDropItems(uint32_t* aNumItems) {
+ LOGDRAGSERVICE("nsDragService::GetNumDropItems");
+
+ if (!mTargetWidget) {
+ LOGDRAGSERVICE(
+ "*** warning: GetNumDropItems \
+ called without a valid target widget!\n");
+ *aNumItems = 0;
+ return NS_OK;
+ }
+
+ bool isList = IsTargetContextList();
+ if (isList) {
+ if (!mSourceDataItems) {
+ *aNumItems = 0;
+ return NS_OK;
+ }
+ mSourceDataItems->GetLength(aNumItems);
+ } else {
+ GdkAtom gdkFlavor = gdk_atom_intern(gTextUriListType, FALSE);
+ if (!gdkFlavor) {
+ *aNumItems = 0;
+ return NS_OK;
+ }
+
+ nsTArray<nsCString> dragFlavors;
+ GetDragFlavors(dragFlavors);
+ GetTargetDragData(gdkFlavor, dragFlavors);
+
+ if (mTargetDragData) {
+ const char* data = reinterpret_cast<char*>(mTargetDragData);
+ *aNumItems = CountTextUriListItems(data, mTargetDragDataLen);
+ } else
+ *aNumItems = 1;
+ }
+ LOGDRAGSERVICE(" NumOfDropItems %d", *aNumItems);
+ return NS_OK;
+}
+
+void nsDragService::GetDragFlavors(nsTArray<nsCString>& aFlavors) {
+ for (GList* tmp = gdk_drag_context_list_targets(mTargetDragContext); tmp;
+ tmp = tmp->next) {
+ GdkAtom atom = GDK_POINTER_TO_ATOM(tmp->data);
+ GUniquePtr<gchar> name(gdk_atom_name(atom));
+ if (!name) {
+ continue;
+ }
+ aFlavors.AppendElement(nsCString(name.get()));
+ }
+}
+
+// Spins event loop, called from JS.
+// Can lead to another round of drag_motion events.
+NS_IMETHODIMP
+nsDragService::GetData(nsITransferable* aTransferable, uint32_t aItemIndex) {
+ LOGDRAGSERVICE("nsDragService::GetData(), index %d", aItemIndex);
+
+ // make sure that we have a transferable
+ if (!aTransferable) {
+ return NS_ERROR_INVALID_ARG;
+ }
+
+ if (!mTargetWidget) {
+ LOGDRAGSERVICE(
+ "*** failed: GetData called without a valid target widget!\n");
+ return NS_ERROR_FAILURE;
+ }
+
+ // get flavor list that includes all acceptable flavors (including
+ // ones obtained through conversion).
+ nsTArray<nsCString> flavors;
+ nsresult rv = aTransferable->FlavorsTransferableCanImport(flavors);
+ if (NS_FAILED(rv)) {
+ LOGDRAGSERVICE(" failed to get flavors, quit.");
+ return rv;
+ }
+
+ // check to see if this is an internal list
+ bool isList = IsTargetContextList();
+
+ if (isList) {
+ LOGDRAGSERVICE(" Process as a list...");
+ // find a matching flavor
+ for (uint32_t i = 0; i < flavors.Length(); ++i) {
+ nsCString& flavorStr = flavors[i];
+ LOGDRAGSERVICE(" [%d] flavor is %s\n", i, flavorStr.get());
+ // get the item with the right index
+ nsCOMPtr<nsITransferable> item =
+ do_QueryElementAt(mSourceDataItems, aItemIndex);
+ if (!item) continue;
+
+ nsCOMPtr<nsISupports> data;
+ LOGDRAGSERVICE(" trying to get transfer data for %s\n", flavorStr.get());
+ rv = item->GetTransferData(flavorStr.get(), getter_AddRefs(data));
+ if (NS_FAILED(rv)) {
+ LOGDRAGSERVICE(" failed.\n");
+ continue;
+ }
+ rv = aTransferable->SetTransferData(flavorStr.get(), data);
+ if (NS_FAILED(rv)) {
+ LOGDRAGSERVICE(" fail to set transfer data into transferable!\n");
+ continue;
+ }
+ LOGDRAGSERVICE(" succeeded\n");
+ // ok, we got the data
+ return NS_OK;
+ }
+ // if we got this far, we failed
+ LOGDRAGSERVICE(" failed to match flavors\n");
+ return NS_ERROR_FAILURE;
+ }
+
+ nsTArray<nsCString> dragFlavors;
+ GetDragFlavors(dragFlavors);
+
+ // Now walk down the list of flavors. When we find one that is
+ // actually present, copy out the data into the transferable in that
+ // format. SetTransferData() implicitly handles conversions.
+ for (uint32_t i = 0; i < flavors.Length(); ++i) {
+ nsCString& flavorStr = flavors[i];
+
+ GdkAtom gdkFlavor;
+ if (flavorStr.EqualsLiteral(kTextMime)) {
+ gdkFlavor = gdk_atom_intern(gTextPlainUTF8Type, FALSE);
+ } else {
+ gdkFlavor = gdk_atom_intern(flavorStr.get(), FALSE);
+ }
+ LOGDRAGSERVICE(" we're getting data %s (gdk flavor %p)\n", flavorStr.get(),
+ gdkFlavor);
+ bool dataFound = false;
+ if (gdkFlavor) {
+ GetTargetDragData(gdkFlavor, dragFlavors);
+ }
+ if (mTargetDragData) {
+ LOGDRAGSERVICE(" dataFound = true\n");
+ dataFound = true;
+ } else {
+ LOGDRAGSERVICE(" dataFound = false, try conversions\n");
+
+ // Dragging and dropping from the file manager would cause us
+ // to parse the source text as a nsIFile URL.
+ if (flavorStr.EqualsLiteral(kFileMime)) {
+ LOGDRAGSERVICE(" conversion %s => %s", kFileMime, gTextUriListType);
+ gdkFlavor = gdk_atom_intern(gTextUriListType, FALSE);
+ GetTargetDragData(gdkFlavor, dragFlavors);
+ if (mTargetDragData) {
+ const char* text = static_cast<char*>(mTargetDragData);
+ char16_t* convertedText = nullptr;
+ uint32_t convertedTextLen = 0;
+
+ GetTextUriListItem(text, mTargetDragDataLen, aItemIndex,
+ &convertedText, &convertedTextLen);
+
+ if (convertedText) {
+ nsCOMPtr<nsIIOService> ioService = do_GetIOService(&rv);
+ nsCOMPtr<nsIURI> fileURI;
+ rv = ioService->NewURI(NS_ConvertUTF16toUTF8(convertedText),
+ nullptr, nullptr, getter_AddRefs(fileURI));
+ if (NS_SUCCEEDED(rv)) {
+ nsCOMPtr<nsIFileURL> fileURL = do_QueryInterface(fileURI, &rv);
+ if (NS_SUCCEEDED(rv)) {
+ nsCOMPtr<nsIFile> file;
+ rv = fileURL->GetFile(getter_AddRefs(file));
+ if (NS_SUCCEEDED(rv)) {
+ // The common wrapping code at the end of
+ // this function assumes the data is text
+ // and calls text-specific operations.
+ // Make a secret hideout here for nsIFile
+ // objects and return early.
+ LOGDRAGSERVICE(" set as file %s",
+ NS_ConvertUTF16toUTF8(convertedText).get());
+ aTransferable->SetTransferData(flavorStr.get(), file);
+ g_free(convertedText);
+ return NS_OK;
+ }
+ }
+ }
+ g_free(convertedText);
+ }
+ continue;
+ }
+ }
+
+ // If we are looking for text/plain, try again with non utf-8 text.
+ if (flavorStr.EqualsLiteral(kTextMime)) {
+ LOGDRAGSERVICE(" conversion %s => %s", kTextMime, kTextMime);
+ gdkFlavor = gdk_atom_intern(kTextMime, FALSE);
+ GetTargetDragData(gdkFlavor, dragFlavors);
+ if (mTargetDragData) {
+ dataFound = true;
+ } // if plain text flavor present
+ } // if looking for text/plain
+
+ // if we are looking for text/x-moz-url and we failed to find
+ // it on the clipboard, try again with text/uri-list, and then
+ // _NETSCAPE_URL
+ if (flavorStr.EqualsLiteral(kURLMime)) {
+ LOGDRAGSERVICE(" conversion %s => %s", kURLMime, gTextUriListType);
+ gdkFlavor = gdk_atom_intern(gTextUriListType, FALSE);
+ GetTargetDragData(gdkFlavor, dragFlavors);
+ if (mTargetDragData) {
+ const char* data = reinterpret_cast<char*>(mTargetDragData);
+ char16_t* convertedText = nullptr;
+ uint32_t convertedTextLen = 0;
+
+ GetTextUriListItem(data, mTargetDragDataLen, aItemIndex,
+ &convertedText, &convertedTextLen);
+
+ if (convertedText) {
+ // out with the old, in with the new
+ g_free(mTargetDragData);
+ mTargetDragData = convertedText;
+ mTargetDragDataLen = convertedTextLen * 2;
+ dataFound = true;
+ }
+ }
+ if (!dataFound) {
+ LOGDRAGSERVICE(" conversion %s => %s", kURLMime, gMozUrlType);
+ gdkFlavor = gdk_atom_intern(gMozUrlType, FALSE);
+ GetTargetDragData(gdkFlavor, dragFlavors);
+ if (mTargetDragData) {
+ const char* castedText = reinterpret_cast<char*>(mTargetDragData);
+ char16_t* convertedText = nullptr;
+ uint32_t convertedTextLen = 0;
+ UTF8ToNewUTF16(castedText, mTargetDragDataLen, &convertedText,
+ &convertedTextLen);
+ if (convertedText) {
+ // out with the old, in with the new
+ g_free(mTargetDragData);
+ mTargetDragData = convertedText;
+ mTargetDragDataLen = convertedTextLen * 2;
+ dataFound = true;
+ }
+ }
+ }
+ }
+
+ } // else we try one last ditch effort to find our data
+
+ if (dataFound) {
+ LOGDRAGSERVICE(" actual data found %s\n",
+ GUniquePtr<gchar>(gdk_atom_name(gdkFlavor)).get());
+
+ if (flavorStr.EqualsLiteral(kTextMime)) {
+ // The text is in UTF-8, so convert the text into UTF-16
+ const char* text = static_cast<char*>(mTargetDragData);
+ NS_ConvertUTF8toUTF16 ucs2string(text, mTargetDragDataLen);
+ char16_t* convertedText = ToNewUnicode(ucs2string, mozilla::fallible);
+ if (convertedText) {
+ g_free(mTargetDragData);
+ mTargetDragData = convertedText;
+ mTargetDragDataLen = ucs2string.Length() * 2;
+ }
+ }
+
+ if (flavorStr.EqualsLiteral(kJPEGImageMime) ||
+ flavorStr.EqualsLiteral(kJPGImageMime) ||
+ flavorStr.EqualsLiteral(kPNGImageMime) ||
+ flavorStr.EqualsLiteral(kGIFImageMime)) {
+ LOGDRAGSERVICE(" saving as image %s\n", flavorStr.get());
+
+ nsCOMPtr<nsIInputStream> byteStream;
+ NS_NewByteInputStream(getter_AddRefs(byteStream),
+ Span((char*)mTargetDragData, mTargetDragDataLen),
+ NS_ASSIGNMENT_COPY);
+ aTransferable->SetTransferData(flavorStr.get(), byteStream);
+ continue;
+ }
+
+ if (!flavorStr.EqualsLiteral(kCustomTypesMime)) {
+ // the DOM only wants LF, so convert from MacOS line endings
+ // to DOM line endings.
+ nsLinebreakHelpers::ConvertPlatformToDOMLinebreaks(
+ flavorStr.EqualsLiteral(kRTFMime), &mTargetDragData,
+ reinterpret_cast<int*>(&mTargetDragDataLen));
+ }
+
+ // put it into the transferable.
+ nsCOMPtr<nsISupports> genericDataWrapper;
+ nsPrimitiveHelpers::CreatePrimitiveForData(
+ flavorStr, mTargetDragData, mTargetDragDataLen,
+ getter_AddRefs(genericDataWrapper));
+ aTransferable->SetTransferData(flavorStr.get(), genericDataWrapper);
+ // we found one, get out of this loop!
+ break;
+ }
+ }
+
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+nsDragService::IsDataFlavorSupported(const char* aDataFlavor, bool* _retval) {
+ LOGDRAGSERVICE("nsDragService::IsDataFlavorSupported(%p) %s",
+ mTargetDragContext.get(), aDataFlavor);
+ if (!_retval) {
+ return NS_ERROR_INVALID_ARG;
+ }
+
+ // set this to no by default
+ *_retval = false;
+
+ // check to make sure that we have a drag object set, here
+ if (!mTargetWidget) {
+ LOGDRAGSERVICE(
+ "*** warning: IsDataFlavorSupported called without a valid target "
+ "widget!\n");
+ return NS_OK;
+ }
+
+ // check to see if the target context is a list.
+ bool isList = IsTargetContextList();
+ // if it is, just look in the internal data since we are the source
+ // for it.
+ if (isList) {
+ LOGDRAGSERVICE(" It's a list");
+ uint32_t numDragItems = 0;
+ // if we don't have mDataItems we didn't start this drag so it's
+ // an external client trying to fool us.
+ if (!mSourceDataItems) {
+ LOGDRAGSERVICE(" quit");
+ return NS_OK;
+ }
+ mSourceDataItems->GetLength(&numDragItems);
+ LOGDRAGSERVICE(" drag items %d", numDragItems);
+ for (uint32_t itemIndex = 0; itemIndex < numDragItems; ++itemIndex) {
+ nsCOMPtr<nsITransferable> currItem =
+ do_QueryElementAt(mSourceDataItems, itemIndex);
+ if (currItem) {
+ nsTArray<nsCString> flavors;
+ currItem->FlavorsTransferableCanExport(flavors);
+ for (uint32_t i = 0; i < flavors.Length(); ++i) {
+ LOGDRAGSERVICE(" checking %s against %s\n", flavors[i].get(),
+ aDataFlavor);
+ if (flavors[i].Equals(aDataFlavor)) {
+ LOGDRAGSERVICE(" found.\n");
+ *_retval = true;
+ }
+ }
+ }
+ }
+ return NS_OK;
+ }
+
+ // check the target context vs. this flavor, one at a time
+ GList* tmp = nullptr;
+ if (mTargetDragContext) {
+ tmp = gdk_drag_context_list_targets(mTargetDragContext);
+ }
+
+ for (; tmp; tmp = tmp->next) {
+ /* Bug 331198 */
+ GdkAtom atom = GDK_POINTER_TO_ATOM(tmp->data);
+ GUniquePtr<gchar> name(gdk_atom_name(atom));
+ if (!name) {
+ continue;
+ }
+
+ if (strcmp(name.get(), aDataFlavor) == 0) {
+ *_retval = true;
+ }
+ // check for automatic text/uri-list -> text/x-moz-url mapping
+ else if (strcmp(name.get(), gTextUriListType) == 0 &&
+ (strcmp(aDataFlavor, kURLMime) == 0 ||
+ strcmp(aDataFlavor, kFileMime) == 0)) {
+ *_retval = true;
+ }
+ // check for automatic _NETSCAPE_URL -> text/x-moz-url mapping
+ else if (strcmp(name.get(), gMozUrlType) == 0 &&
+ (strcmp(aDataFlavor, kURLMime) == 0)) {
+ *_retval = true;
+ }
+
+ if (*_retval) {
+ LOGDRAGSERVICE(" supported, with converting %s => %s", name.get(),
+ aDataFlavor);
+ }
+ }
+
+ if (!*_retval) {
+ LOGDRAGSERVICE(" %s is not supported", aDataFlavor);
+ }
+
+ return NS_OK;
+}
+
+void nsDragService::ReplyToDragMotion(GdkDragContext* aDragContext,
+ guint aTime) {
+ LOGDRAGSERVICE("nsDragService::ReplyToDragMotion(%p) can drop %d",
+ aDragContext, mCanDrop);
+
+ GdkDragAction action = (GdkDragAction)0;
+ if (mCanDrop) {
+ // notify the dragger if we can drop
+ switch (mDragAction) {
+ case DRAGDROP_ACTION_COPY:
+ LOGDRAGSERVICE(" set explicit action copy");
+ action = GDK_ACTION_COPY;
+ break;
+ case DRAGDROP_ACTION_LINK:
+ LOGDRAGSERVICE(" set explicit action link");
+ action = GDK_ACTION_LINK;
+ break;
+ case DRAGDROP_ACTION_NONE:
+ LOGDRAGSERVICE(" set explicit action none");
+ action = (GdkDragAction)0;
+ break;
+ default:
+ LOGDRAGSERVICE(" set explicit action move");
+ action = GDK_ACTION_MOVE;
+ break;
+ }
+ } else {
+ LOGDRAGSERVICE(" mCanDrop is false, disable drop");
+ }
+
+ // gdk_drag_status() is a kind of red herring here.
+ // It does not control final D&D operation type (copy/move) but controls
+ // drop/no-drop D&D state and default cursor type (copy/move).
+
+ // Actual D&D operation is determined by mDragAction which is set by
+ // SetDragAction() from UpdateDragAction() or gecko/layout.
+
+ // State passed to gdk_drag_status() sets default D&D cursor type
+ // which can be switched by key control (CTRL/SHIFT).
+ // If user changes D&D cursor (and D&D operation) we're notified by
+ // gdk_drag_context_get_selected_action() and update mDragAction.
+
+ // But if we pass mDragAction back to gdk_drag_status() the D&D operation
+ // becames locked and won't be returned when D&D modifiers (CTRL/SHIFT)
+ // are released.
+
+ // This gdk_drag_context_get_selected_action() -> gdk_drag_status() ->
+ // gdk_drag_context_get_selected_action() cycle happens on Wayland.
+ if (widget::GdkIsWaylandDisplay() && action == GDK_ACTION_COPY) {
+ LOGDRAGSERVICE(" Wayland: switch copy to move");
+ action = GDK_ACTION_MOVE;
+ }
+
+ LOGDRAGSERVICE(" gdk_drag_status() action %d", action);
+ gdk_drag_status(aDragContext, action, aTime);
+}
+
+void nsDragService::EnsureCachedDataValidForContext(
+ GdkDragContext* aDragContext) {
+ if (mCachedDragContext != (uintptr_t)aDragContext) {
+ mCachedData.Clear();
+ mCachedDragContext = (uintptr_t)aDragContext;
+ }
+}
+
+void nsDragService::TargetDataReceived(GtkWidget* aWidget,
+ GdkDragContext* aContext, gint aX,
+ gint aY,
+ GtkSelectionData* aSelectionData,
+ guint aInfo, guint32 aTime) {
+ LOGDRAGSERVICE("nsDragService::TargetDataReceived(%p)", aContext);
+ TargetResetData();
+
+ EnsureCachedDataValidForContext(aContext);
+
+ mTargetDragDataReceived = true;
+ gint len = gtk_selection_data_get_length(aSelectionData);
+ const guchar* data = gtk_selection_data_get_data(aSelectionData);
+
+ GdkAtom target = gtk_selection_data_get_target(aSelectionData);
+ GUniquePtr<gchar> name(gdk_atom_name(target));
+ nsDependentCString flavor(name.get());
+
+ LOGDRAGSERVICE(" got data, MIME %s", flavor.get());
+
+ if (len > 0 && data) {
+ mTargetDragDataLen = len;
+ mTargetDragData = g_malloc(mTargetDragDataLen);
+ memcpy(mTargetDragData, data, mTargetDragDataLen);
+
+ LOGDRAGSERVICE(" got data, len = %d", mTargetDragDataLen);
+
+ nsTArray<uint8_t> copy;
+ if (!copy.SetLength(len, fallible)) {
+ return;
+ }
+ memcpy(copy.Elements(), data, len);
+
+ mCachedData.InsertOrUpdate(flavor, std::move(copy));
+ } else {
+ LOGDRAGSERVICE("Failed to get data. selection data len was %d\n",
+ mTargetDragDataLen);
+ mCachedData.InsertOrUpdate(flavor, nsTArray<uint8_t>());
+ }
+}
+
+bool nsDragService::IsTargetContextList(void) {
+ bool retval = false;
+
+ // gMimeListType drags only work for drags within a single process. The
+ // gtk_drag_get_source_widget() function will return nullptr if the source
+ // of the drag is another app, so we use it to check if a gMimeListType
+ // drop will work or not.
+ if (mTargetDragContext &&
+ gtk_drag_get_source_widget(mTargetDragContext) == nullptr) {
+ return retval;
+ }
+
+ GList* tmp = nullptr;
+ if (mTargetDragContext) {
+ tmp = gdk_drag_context_list_targets(mTargetDragContext);
+ }
+
+ // walk the list of context targets and see if one of them is a list
+ // of items.
+ for (; tmp; tmp = tmp->next) {
+ /* Bug 331198 */
+ GdkAtom atom = GDK_POINTER_TO_ATOM(tmp->data);
+ GUniquePtr<gchar> name(gdk_atom_name(atom));
+ if (name && !strcmp(name.get(), gMimeListType)) {
+ return true;
+ }
+ }
+
+ return retval;
+}
+
+// Spins event loop, called from eDragTaskMotion handler by
+// DispatchMotionEvents().
+// Can lead to another round of drag_motion events.
+void nsDragService::GetTargetDragData(GdkAtom aFlavor,
+ nsTArray<nsCString>& aDropFlavors) {
+ LOGDRAGSERVICE("nsDragService::GetTargetDragData(%p) '%s'\n",
+ mTargetDragContext.get(),
+ GUniquePtr<gchar>(gdk_atom_name(aFlavor)).get());
+
+ // reset our target data areas
+ TargetResetData();
+
+ GUniquePtr<gchar> name(gdk_atom_name(aFlavor));
+ nsDependentCString flavor(name.get());
+
+ // Return early when requested MIME is not offered by D&D.
+ if (!aDropFlavors.Contains(flavor)) {
+ LOGDRAGSERVICE(" %s is missing", flavor.get());
+ return;
+ }
+
+ if (mTargetDragContext) {
+ // We keep a copy of the requested data with the same life-time
+ // as mTargetDragContext.
+ // Especially with multiple items the same data is requested
+ // very often.
+ EnsureCachedDataValidForContext(mTargetDragContext);
+ if (auto cached = mCachedData.Lookup(flavor)) {
+ mTargetDragDataLen = cached->Length();
+ LOGDRAGSERVICE(" using cached data for %s, length is %d", flavor.get(),
+ mTargetDragDataLen);
+
+ if (mTargetDragDataLen) {
+ mTargetDragData = g_malloc(mTargetDragDataLen);
+ memcpy(mTargetDragData, cached->Elements(), mTargetDragDataLen);
+ }
+
+ mTargetDragDataReceived = true;
+ LOGDRAGSERVICE(" %s found in cache", flavor.get());
+ return;
+ }
+
+ gtk_drag_get_data(mTargetWidget, mTargetDragContext, aFlavor, mTargetTime);
+
+ LOGDRAGSERVICE(" about to start inner iteration.");
+ gtk_main_iteration();
+
+ PRTime entryTime = PR_Now();
+ while (!mTargetDragDataReceived && mDoingDrag) {
+ // check the number of iterations
+ LOGDRAGSERVICE(" doing iteration...\n");
+ PR_Sleep(PR_MillisecondsToInterval(10)); /* sleep for 10 ms/iteration */
+ if (PR_Now() - entryTime > NS_DND_TIMEOUT) {
+ LOGDRAGSERVICE(" failed to get D&D data in time!\n");
+ break;
+ }
+ gtk_main_iteration();
+ }
+ }
+
+#ifdef MOZ_LOGGING
+ if (mTargetDragDataLen && mTargetDragData) {
+ LOGDRAGSERVICE(" %s got from system", flavor.get());
+ } else {
+ LOGDRAGSERVICE(" %s failed to get from system", flavor.get());
+ }
+#endif
+}
+
+void nsDragService::TargetResetData(void) {
+ mTargetDragDataReceived = false;
+ // make sure to free old data if we have to
+ g_free(mTargetDragData);
+ mTargetDragData = 0;
+ mTargetDragDataLen = 0;
+}
+
+static void TargetArrayAddTarget(nsTArray<GtkTargetEntry*>& aTargetArray,
+ const char* aTarget) {
+ GtkTargetEntry* target = (GtkTargetEntry*)g_malloc(sizeof(GtkTargetEntry));
+ target->target = g_strdup(aTarget);
+ target->flags = 0;
+ aTargetArray.AppendElement(target);
+ LOGDRAGSERVICESTATIC("adding target %s\n", aTarget);
+}
+
+static bool CanExportAsURLTarget(const char16_t* aURLData, uint32_t aURLLen) {
+ for (const nsLiteralString& disallowed : kDisallowedExportedSchemes) {
+ auto len = disallowed.AsString().Length();
+ if (len < aURLLen) {
+ if (!memcmp(disallowed.get(), aURLData,
+ /* len is char16_t char count */ len * 2)) {
+ LOGDRAGSERVICESTATIC("rejected URL scheme %s\n",
+ NS_ConvertUTF16toUTF8(disallowed).get());
+ return false;
+ }
+ }
+ }
+ return true;
+}
+
+GtkTargetList* nsDragService::GetSourceList(void) {
+ if (!mSourceDataItems) {
+ return nullptr;
+ }
+
+ nsTArray<GtkTargetEntry*> targetArray;
+ GtkTargetEntry* targets;
+ GtkTargetList* targetList = 0;
+ uint32_t targetCount = 0;
+ unsigned int numDragItems = 0;
+
+ mSourceDataItems->GetLength(&numDragItems);
+ LOGDRAGSERVICE(" numDragItems = %d", numDragItems);
+
+ // Check to see if we're dragging > 1 item.
+ if (numDragItems > 1) {
+ // as the Xdnd protocol only supports a single item (or is it just
+ // gtk's implementation?), we don't advertise all flavours listed
+ // in the nsITransferable.
+
+ // the application/x-moz-internal-item-list format, which preserves
+ // all information for drags within the same mozilla instance.
+ TargetArrayAddTarget(targetArray, gMimeListType);
+
+ // check what flavours are supported so we can decide what other
+ // targets to advertise.
+ nsCOMPtr<nsITransferable> currItem = do_QueryElementAt(mSourceDataItems, 0);
+
+ if (currItem) {
+ nsTArray<nsCString> flavors;
+ currItem->FlavorsTransferableCanExport(flavors);
+ for (uint32_t i = 0; i < flavors.Length(); ++i) {
+ // check if text/x-moz-url is supported.
+ // If so, advertise
+ // text/uri-list.
+ if (flavors[i].EqualsLiteral(kURLMime)) {
+ TargetArrayAddTarget(targetArray, gTextUriListType);
+ break;
+ }
+ }
+ } // if item is a transferable
+ } else if (numDragItems == 1) {
+ nsCOMPtr<nsITransferable> currItem = do_QueryElementAt(mSourceDataItems, 0);
+ if (currItem) {
+ nsTArray<nsCString> flavors;
+ currItem->FlavorsTransferableCanExport(flavors);
+ for (uint32_t i = 0; i < flavors.Length(); ++i) {
+ nsCString& flavorStr = flavors[i];
+
+ TargetArrayAddTarget(targetArray, flavorStr.get());
+
+ // If there is a file, add the text/uri-list type.
+ if (flavorStr.EqualsLiteral(kFileMime)) {
+ TargetArrayAddTarget(targetArray, gTextUriListType);
+ }
+ // Check to see if this is text/plain.
+ else if (flavorStr.EqualsLiteral(kTextMime)) {
+ TargetArrayAddTarget(targetArray, gTextPlainUTF8Type);
+ }
+ // Check to see if this is the x-moz-url type.
+ // If it is, add _NETSCAPE_URL
+ // this is a type used by everybody.
+ else if (flavorStr.EqualsLiteral(kURLMime)) {
+ nsCOMPtr<nsISupports> data;
+ if (NS_SUCCEEDED(currItem->GetTransferData(flavorStr.get(),
+ getter_AddRefs(data)))) {
+ void* tmpData = nullptr;
+ uint32_t tmpDataLen = 0;
+ nsPrimitiveHelpers::CreateDataFromPrimitive(
+ nsDependentCString(flavorStr.get()), data, &tmpData,
+ &tmpDataLen);
+ if (tmpData) {
+ if (CanExportAsURLTarget(reinterpret_cast<char16_t*>(tmpData),
+ tmpDataLen / 2)) {
+ TargetArrayAddTarget(targetArray, gMozUrlType);
+ }
+ free(tmpData);
+ }
+ }
+ }
+ // check if application/x-moz-file-promise url is supported.
+ // If so, advertise text/uri-list.
+ else if (flavorStr.EqualsLiteral(kFilePromiseURLMime)) {
+ TargetArrayAddTarget(targetArray, gTextUriListType);
+ }
+ // XdndDirectSave, use on X.org only.
+ else if (widget::GdkIsX11Display() && !widget::IsXWaylandProtocol() &&
+ flavorStr.EqualsLiteral(kFilePromiseMime)) {
+ TargetArrayAddTarget(targetArray, gXdndDirectSaveType);
+ }
+ // kNativeImageMime
+ else if (flavorStr.EqualsLiteral(kNativeImageMime)) {
+ TargetArrayAddTarget(targetArray, kPNGImageMime);
+ TargetArrayAddTarget(targetArray, kJPEGImageMime);
+ TargetArrayAddTarget(targetArray, kJPGImageMime);
+ TargetArrayAddTarget(targetArray, kGIFImageMime);
+ }
+ }
+ }
+ }
+
+ // get all the elements that we created.
+ targetCount = targetArray.Length();
+ if (targetCount) {
+ // allocate space to create the list of valid targets
+ targets = (GtkTargetEntry*)g_malloc(sizeof(GtkTargetEntry) * targetCount);
+ uint32_t targetIndex;
+ for (targetIndex = 0; targetIndex < targetCount; ++targetIndex) {
+ GtkTargetEntry* disEntry = targetArray.ElementAt(targetIndex);
+ // this is a string reference but it will be freed later.
+ targets[targetIndex].target = disEntry->target;
+ targets[targetIndex].flags = disEntry->flags;
+ targets[targetIndex].info = 0;
+ }
+ targetList = gtk_target_list_new(targets, targetCount);
+ // clean up the target list
+ for (uint32_t cleanIndex = 0; cleanIndex < targetCount; ++cleanIndex) {
+ GtkTargetEntry* thisTarget = targetArray.ElementAt(cleanIndex);
+ g_free(thisTarget->target);
+ g_free(thisTarget);
+ }
+ g_free(targets);
+ } else {
+ // We need to create a dummy target list to be able initialize dnd.
+ targetList = gtk_target_list_new(nullptr, 0);
+ }
+ return targetList;
+}
+
+void nsDragService::SourceEndDragSession(GdkDragContext* aContext,
+ gint aResult) {
+ LOGDRAGSERVICE("SourceEndDragSession(%p) result %s\n", aContext,
+ kGtkDragResults[aResult]);
+
+ // this just releases the list of data items that we provide
+ mSourceDataItems = nullptr;
+
+ // Remove this property, if it exists, to satisfy the Direct Save Protocol.
+ GdkAtom property = gdk_atom_intern(gXdndDirectSaveType, FALSE);
+ gdk_property_delete(gdk_drag_context_get_source_window(aContext), property);
+
+ if (!mDoingDrag || mScheduledTask == eDragTaskSourceEnd)
+ // EndDragSession() was already called on drop
+ // or SourceEndDragSession on drag-failed
+ return;
+
+ if (mEndDragPoint.x < 0) {
+ // We don't have a drag end point, so guess
+ gint x, y;
+ GdkDisplay* display = gdk_display_get_default();
+ GdkScreen* screen = gdk_display_get_default_screen(display);
+ GtkWindow* window = GetGtkWindow(mSourceDocument);
+ GdkWindow* gdkWindow = window ? gtk_widget_get_window(GTK_WIDGET(window))
+ : gdk_screen_get_root_window(screen);
+ gdk_window_get_device_position(
+ gdkWindow, gdk_drag_context_get_device(aContext), &x, &y, nullptr);
+ gint scale = gdk_window_get_scale_factor(gdkWindow);
+ SetDragEndPoint(LayoutDeviceIntPoint(x * scale, y * scale));
+ LOGDRAGSERVICE(" guess drag end point %d %d\n", x * scale, y * scale);
+ }
+
+ // Either the drag was aborted or the drop occurred outside the app.
+ // The dropEffect of mDataTransfer is not updated for motion outside the
+ // app, but is needed for the dragend event, so set it now.
+
+ uint32_t dropEffect;
+
+ if (aResult == GTK_DRAG_RESULT_SUCCESS) {
+ LOGDRAGSERVICE(" drop is accepted");
+ // With GTK+ versions 2.10.x and prior the drag may have been
+ // cancelled (but no drag-failed signal would have been sent).
+ // aContext->dest_window will be non-nullptr only if the drop was
+ // sent.
+ GdkDragAction action = gdk_drag_context_get_dest_window(aContext)
+ ? gdk_drag_context_get_actions(aContext)
+ : (GdkDragAction)0;
+
+ // Only one bit of action should be set, but, just in case someone
+ // does something funny, erring away from MOVE, and not recording
+ // unusual action combinations as NONE.
+ if (!action) {
+ LOGDRAGSERVICE(" drop action is none");
+ dropEffect = DRAGDROP_ACTION_NONE;
+ } else if (action & GDK_ACTION_COPY) {
+ LOGDRAGSERVICE(" drop action is copy");
+ dropEffect = DRAGDROP_ACTION_COPY;
+ } else if (action & GDK_ACTION_LINK) {
+ LOGDRAGSERVICE(" drop action is link");
+ dropEffect = DRAGDROP_ACTION_LINK;
+ } else if (action & GDK_ACTION_MOVE) {
+ LOGDRAGSERVICE(" drop action is move");
+ dropEffect = DRAGDROP_ACTION_MOVE;
+ } else {
+ LOGDRAGSERVICE(" drop action is copy");
+ dropEffect = DRAGDROP_ACTION_COPY;
+ }
+ } else {
+ LOGDRAGSERVICE(" drop action is none");
+ dropEffect = DRAGDROP_ACTION_NONE;
+ if (aResult != GTK_DRAG_RESULT_NO_TARGET) {
+ LOGDRAGSERVICE(" drop is user chancelled\n");
+ mUserCancelled = true;
+ }
+ }
+
+ if (mDataTransfer) {
+ mDataTransfer->SetDropEffectInt(dropEffect);
+ }
+
+ // Schedule the appropriate drag end dom events.
+ Schedule(eDragTaskSourceEnd, nullptr, nullptr, LayoutDeviceIntPoint(), 0);
+}
+
+static nsresult GetDownloadDetails(nsITransferable* aTransferable,
+ nsIURI** aSourceURI, nsAString& aFilename) {
+ *aSourceURI = nullptr;
+ MOZ_ASSERT(aTransferable != nullptr, "aTransferable must not be null");
+
+ // get the URI from the kFilePromiseURLMime flavor
+ nsCOMPtr<nsISupports> urlPrimitive;
+ nsresult rv = aTransferable->GetTransferData(kFilePromiseURLMime,
+ getter_AddRefs(urlPrimitive));
+ if (NS_FAILED(rv)) {
+ return NS_ERROR_FAILURE;
+ }
+ nsCOMPtr<nsISupportsString> srcUrlPrimitive = do_QueryInterface(urlPrimitive);
+ if (!srcUrlPrimitive) {
+ return NS_ERROR_FAILURE;
+ }
+
+ nsAutoString srcUri;
+ srcUrlPrimitive->GetData(srcUri);
+ if (srcUri.IsEmpty()) {
+ return NS_ERROR_FAILURE;
+ }
+ nsCOMPtr<nsIURI> sourceURI;
+ NS_NewURI(getter_AddRefs(sourceURI), srcUri);
+
+ nsAutoString srcFileName;
+ nsCOMPtr<nsISupports> fileNamePrimitive;
+ rv = aTransferable->GetTransferData(kFilePromiseDestFilename,
+ getter_AddRefs(fileNamePrimitive));
+ if (NS_FAILED(rv)) {
+ return NS_ERROR_FAILURE;
+ }
+ nsCOMPtr<nsISupportsString> srcFileNamePrimitive =
+ do_QueryInterface(fileNamePrimitive);
+ if (srcFileNamePrimitive) {
+ srcFileNamePrimitive->GetData(srcFileName);
+ } else {
+ nsCOMPtr<nsIURL> sourceURL = do_QueryInterface(sourceURI);
+ if (!sourceURL) {
+ return NS_ERROR_FAILURE;
+ }
+ nsAutoCString urlFileName;
+ sourceURL->GetFileName(urlFileName);
+ NS_UnescapeURL(urlFileName);
+ CopyUTF8toUTF16(urlFileName, srcFileName);
+ }
+ if (srcFileName.IsEmpty()) {
+ return NS_ERROR_FAILURE;
+ }
+
+ sourceURI.swap(*aSourceURI);
+ aFilename = srcFileName;
+ return NS_OK;
+}
+
+// See nsContentAreaDragDropDataProvider::GetFlavorData() for reference.
+nsresult nsDragService::CreateTempFile(nsITransferable* aItem,
+ nsACString& aURI) {
+ LOGDRAGSERVICE("nsDragService::CreateTempFile()");
+
+ nsCOMPtr<nsIFile> tmpDir;
+ nsresult rv = NS_GetSpecialDirectory(NS_OS_TEMP_DIR, getter_AddRefs(tmpDir));
+ if (NS_FAILED(rv)) {
+ LOGDRAGSERVICE(" Failed to get temp directory\n");
+ return rv;
+ }
+
+ nsCOMPtr<nsIInputStream> inputStream;
+ nsCOMPtr<nsIChannel> channel;
+
+ // extract the file name and source uri of the promise-file data
+ nsAutoString wideFileName;
+ nsCOMPtr<nsIURI> sourceURI;
+ rv = GetDownloadDetails(aItem, getter_AddRefs(sourceURI), wideFileName);
+ if (NS_FAILED(rv)) {
+ LOGDRAGSERVICE(
+ " Failed to extract file name and source uri from download url");
+ return rv;
+ }
+
+ // Check if the file is already stored at /tmp.
+ // It happens when drop destination is changed and SourceDataGet() is caled
+ // more than once.
+ nsAutoCString fileName;
+ CopyUTF16toUTF8(wideFileName, fileName);
+ auto fileLen = fileName.Length();
+ for (const auto& url : mTempFileUrls) {
+ auto URLLen = url.Length();
+ if (URLLen > fileLen &&
+ fileName.Equals(nsDependentCString(url, URLLen - fileLen))) {
+ aURI = url;
+ LOGDRAGSERVICE(" recycle file %s", PromiseFlatCString(aURI).get());
+ return NS_OK;
+ }
+ }
+
+ // create and open channel for source uri
+ nsCOMPtr<nsIPrincipal> principal = aItem->GetRequestingPrincipal();
+ nsContentPolicyType contentPolicyType = aItem->GetContentPolicyType();
+ nsCOMPtr<nsICookieJarSettings> cookieJarSettings =
+ aItem->GetCookieJarSettings();
+ rv = NS_NewChannel(getter_AddRefs(channel), sourceURI, principal,
+ nsILoadInfo::SEC_ALLOW_CROSS_ORIGIN_SEC_CONTEXT_IS_NULL,
+ contentPolicyType, cookieJarSettings);
+ if (NS_FAILED(rv)) {
+ LOGDRAGSERVICE(" Failed to create new channel for source uri");
+ return rv;
+ }
+
+ rv = channel->Open(getter_AddRefs(inputStream));
+ if (NS_FAILED(rv)) {
+ LOGDRAGSERVICE(" Failed to open channel for source uri");
+ return rv;
+ }
+
+ // build the file:///tmp/dnd_file URL
+ tmpDir->Append(NS_LITERAL_STRING_FROM_CSTRING("dnd_file"));
+ rv = tmpDir->CreateUnique(nsIFile::DIRECTORY_TYPE, 0700);
+ if (NS_FAILED(rv)) {
+ LOGDRAGSERVICE(" Failed create tmp dir");
+ return rv;
+ }
+
+ // store a copy of that temporary directory so we can
+ // clean them up when nsDragService is destructed
+ nsCOMPtr<nsIFile> tempFile;
+ tmpDir->Clone(getter_AddRefs(tempFile));
+ mTemporaryFiles.AppendObject(tempFile);
+ if (mTempFileTimerID) {
+ g_source_remove(mTempFileTimerID);
+ mTempFileTimerID = 0;
+ }
+
+ // extend file:///tmp/dnd_file/<filename> URL
+ tmpDir->Append(wideFileName);
+
+ nsCOMPtr<nsIOutputStream> outputStream;
+ rv = NS_NewLocalFileOutputStream(getter_AddRefs(outputStream), tmpDir);
+ if (NS_FAILED(rv)) {
+ LOGDRAGSERVICE(" Failed to open output stream for temporary file");
+ return rv;
+ }
+
+ char buffer[8192];
+ uint32_t readCount = 0;
+ uint32_t writeCount = 0;
+ while (1) {
+ rv = inputStream->Read(buffer, sizeof(buffer), &readCount);
+ if (NS_FAILED(rv)) {
+ LOGDRAGSERVICE(" Failed to read data from source uri");
+ return rv;
+ }
+
+ if (readCount == 0) break;
+
+ rv = outputStream->Write(buffer, readCount, &writeCount);
+ if (NS_FAILED(rv)) {
+ LOGDRAGSERVICE(" Failed to write data to temporary file");
+ return rv;
+ }
+ }
+
+ inputStream->Close();
+ rv = outputStream->Close();
+ if (NS_FAILED(rv)) {
+ LOGDRAGSERVICE(" Failed to write data to temporary file");
+ return rv;
+ }
+
+ nsCOMPtr<nsIURI> uri;
+ rv = NS_NewFileURI(getter_AddRefs(uri), tmpDir);
+ if (NS_FAILED(rv)) {
+ LOGDRAGSERVICE(" Failed to get file URI");
+ return rv;
+ }
+ nsCOMPtr<nsIURL> fileURL(do_QueryInterface(uri));
+ if (!fileURL) {
+ LOGDRAGSERVICE(" Failed to query file interface");
+ return NS_ERROR_FAILURE;
+ }
+ rv = fileURL->GetSpec(aURI);
+ if (NS_FAILED(rv)) {
+ LOGDRAGSERVICE(" Failed to get filepath");
+ return rv;
+ }
+
+ // store url of temporary file
+ mTempFileUrls.AppendElement()->Assign(aURI);
+ LOGDRAGSERVICE(" storing tmp file as %s", PromiseFlatCString(aURI).get());
+ return NS_OK;
+}
+
+bool nsDragService::SourceDataAppendURLFileItem(nsACString& aURI,
+ nsITransferable* aItem) {
+ // If there is a file available, create a URI from the file.
+ nsCOMPtr<nsISupports> data;
+ nsresult rv = aItem->GetTransferData(kFileMime, getter_AddRefs(data));
+ NS_ENSURE_SUCCESS(rv, false);
+ if (nsCOMPtr<nsIFile> file = do_QueryInterface(data)) {
+ nsCOMPtr<nsIURI> fileURI;
+ NS_NewFileURI(getter_AddRefs(fileURI), file);
+ if (fileURI) {
+ fileURI->GetSpec(aURI);
+ return true;
+ }
+ }
+ return false;
+}
+
+bool nsDragService::SourceDataAppendURLItem(nsITransferable* aItem,
+ bool aExternalDrop,
+ nsACString& aURI) {
+ nsCOMPtr<nsISupports> data;
+ nsresult rv = aItem->GetTransferData(kURLMime, getter_AddRefs(data));
+ if (NS_FAILED(rv)) {
+ return SourceDataAppendURLFileItem(aURI, aItem);
+ }
+
+ nsCOMPtr<nsISupportsString> string = do_QueryInterface(data);
+ if (!string) {
+ return false;
+ }
+
+ nsAutoString text;
+ string->GetData(text);
+ if (!aExternalDrop || CanExportAsURLTarget(text.get(), text.Length())) {
+ AppendUTF16toUTF8(text, aURI);
+ return true;
+ }
+
+ // We're dropping to another application and the URL can't be exported
+ // as it's internal one (mailbox:// etc.)
+ // Try to get file target directly.
+ if (SourceDataAppendURLFileItem(aURI, aItem)) {
+ return true;
+ }
+
+ // We can't get the file directly so try to download it and save to tmp.
+ // The desktop or file manager expects for drags of promise-file data
+ // the text/uri-list flavor set to a temporary file that contains the
+ // promise-file data.
+ // We open a stream on the <protocol>:// url here and save the content
+ // to file:///tmp/dnd_file/<filename> and pass this url
+ // as text/uri-list flavor.
+
+ // check whether transferable contains FilePromiseUrl flavor...
+ nsCOMPtr<nsISupports> promiseData;
+ rv = aItem->GetTransferData(kFilePromiseURLMime, getter_AddRefs(promiseData));
+ NS_ENSURE_SUCCESS(rv, false);
+
+ // ... if so, create a temporary file and pass its url
+ return NS_SUCCEEDED(CreateTempFile(aItem, aURI));
+}
+
+void nsDragService::SourceDataGetUriList(GdkDragContext* aContext,
+ GtkSelectionData* aSelectionData,
+ uint32_t aDragItems) {
+ // Check if we're transfering data to another application.
+ // gdk_drag_context_get_dest_window() on X11 returns GdkWindow even for
+ // different application so use nsWindow::GetWindow() to check if that's
+ // our window.
+ const bool isExternalDrop =
+ widget::GdkIsX11Display()
+ ? !nsWindow::GetWindow(gdk_drag_context_get_dest_window(aContext))
+ : !gdk_drag_context_get_dest_window(aContext);
+
+ LOGDRAGSERVICE("nsDragService::SourceDataGetUriLists() len %d external %d",
+ aDragItems, isExternalDrop);
+
+ // Disable processing of native events until we store all files to /tmp.
+ // Otherwise user can quit drop before we have all files saved
+ // and that cancels whole D&D.
+ AutoSuspendNativeEvents suspend;
+
+ nsAutoCString uriList;
+ for (uint32_t i = 0; i < aDragItems; i++) {
+ nsCOMPtr<nsITransferable> item = do_QueryElementAt(mSourceDataItems, i);
+ if (!item) {
+ continue;
+ }
+ nsAutoCString uri;
+ if (!SourceDataAppendURLItem(item, isExternalDrop, uri)) {
+ continue;
+ }
+ // text/x-moz-url is of form url + "\n" + title.
+ // We just want the url.
+ int32_t separatorPos = uri.FindChar(u'\n');
+ if (separatorPos >= 0) {
+ uri.Truncate(separatorPos);
+ }
+ uriList.Append(uri);
+ uriList.AppendLiteral("\r\n");
+ }
+
+ LOGDRAGSERVICE("URI list\n%s", uriList.get());
+ GdkAtom target = gtk_selection_data_get_target(aSelectionData);
+ gtk_selection_data_set(aSelectionData, target, 8, (guchar*)uriList.get(),
+ uriList.Length());
+}
+
+void nsDragService::SourceDataGetImage(nsITransferable* aItem,
+ GtkSelectionData* aSelectionData) {
+ LOGDRAGSERVICE("nsDragService::SourceDataGetImage()");
+
+ nsresult rv;
+ nsCOMPtr<nsISupports> data;
+ rv = aItem->GetTransferData(kNativeImageMime, getter_AddRefs(data));
+ NS_ENSURE_SUCCESS_VOID(rv);
+
+ LOGDRAGSERVICE(" posting image\n");
+ nsCOMPtr<imgIContainer> image = do_QueryInterface(data);
+ if (!image) {
+ LOGDRAGSERVICE(" do_QueryInterface failed\n");
+ return;
+ }
+ RefPtr<GdkPixbuf> pixbuf = nsImageToPixbuf::ImageToPixbuf(image);
+ if (!pixbuf) {
+ LOGDRAGSERVICE(" ImageToPixbuf failed\n");
+ return;
+ }
+ gtk_selection_data_set_pixbuf(aSelectionData, pixbuf);
+ LOGDRAGSERVICE(" image data set\n");
+ return;
+}
+
+void nsDragService::SourceDataGetXDND(nsITransferable* aItem,
+ GdkDragContext* aContext,
+ GtkSelectionData* aSelectionData) {
+ LOGDRAGSERVICE("nsDragService::SourceDataGetXDND");
+
+ // Indicate failure by default.
+ GdkAtom target = gtk_selection_data_get_target(aSelectionData);
+ gtk_selection_data_set(aSelectionData, target, 8, (guchar*)"E", 1);
+
+ GdkAtom property = gdk_atom_intern(gXdndDirectSaveType, FALSE);
+ GdkAtom type = gdk_atom_intern(kTextMime, FALSE);
+
+ GdkWindow* srcWindow = gdk_drag_context_get_source_window(aContext);
+ if (!srcWindow) {
+ LOGDRAGSERVICE(" failed to get source GdkWindow!");
+ return;
+ }
+
+ // Ensure null termination.
+ nsAutoCString data;
+ {
+ GUniquePtr<guchar> gdata;
+ gint length = 0;
+ if (!gdk_property_get(srcWindow, property, type, 0, INT32_MAX, FALSE,
+ nullptr, nullptr, &length, getter_Transfers(gdata))) {
+ LOGDRAGSERVICE(" failed to get gXdndDirectSaveType GdkWindow property.");
+ return;
+ }
+ data.Assign(nsDependentCSubstring((const char*)gdata.get(), length));
+ }
+
+ GUniquePtr<char> hostname;
+ GUniquePtr<char> fullpath(
+ g_filename_from_uri(data.get(), getter_Transfers(hostname), nullptr));
+ if (!fullpath) {
+ LOGDRAGSERVICE(" failed to get file from uri.");
+ return;
+ }
+
+ // If there is no hostname in the URI, NULL will be stored.
+ // We should not accept uris with from a different host.
+ if (hostname) {
+ nsCOMPtr<nsIPropertyBag2> infoService =
+ do_GetService(NS_SYSTEMINFO_CONTRACTID);
+ if (!infoService) {
+ return;
+ }
+ nsAutoCString host;
+ if (NS_SUCCEEDED(infoService->GetPropertyAsACString(u"host"_ns, host))) {
+ if (!host.Equals(hostname.get())) {
+ LOGDRAGSERVICE(" ignored drag because of different host.");
+ // Special error code "F" for this case.
+ gtk_selection_data_set(aSelectionData, target, 8, (guchar*)"F", 1);
+ return;
+ }
+ }
+ }
+
+ LOGDRAGSERVICE(" XdndDirectSave filepath is %s", fullpath.get());
+
+ nsCOMPtr<nsIFile> file;
+ if (NS_FAILED(NS_NewNativeLocalFile(nsDependentCString(fullpath.get()), false,
+ getter_AddRefs(file)))) {
+ LOGDRAGSERVICE(" failed to get local file");
+ return;
+ }
+
+ // We have to split the path into a directory and filename,
+ // because our internal file-promise API is based on these.
+ nsCOMPtr<nsIFile> directory;
+ file->GetParent(getter_AddRefs(directory));
+
+ aItem->SetTransferData(kFilePromiseDirectoryMime, directory);
+
+ nsCOMPtr<nsISupportsString> filenamePrimitive =
+ do_CreateInstance(NS_SUPPORTS_STRING_CONTRACTID);
+ if (!filenamePrimitive) {
+ return;
+ }
+
+ nsAutoString leafName;
+ file->GetLeafName(leafName);
+ filenamePrimitive->SetData(leafName);
+
+ aItem->SetTransferData(kFilePromiseDestFilename, filenamePrimitive);
+
+ nsCOMPtr<nsISupports> promiseData;
+ nsresult rv =
+ aItem->GetTransferData(kFilePromiseMime, getter_AddRefs(promiseData));
+ NS_ENSURE_SUCCESS_VOID(rv);
+
+ // Indicate success.
+ gtk_selection_data_set(aSelectionData, target, 8, (guchar*)"S", 1);
+ return;
+}
+
+bool nsDragService::SourceDataGetText(nsITransferable* aItem,
+ const nsACString& aMIMEType,
+ bool aNeedToDoConversionToPlainText,
+ GtkSelectionData* aSelectionData) {
+ LOGDRAGSERVICE("nsDragService::SourceDataGetPlain()");
+
+ nsresult rv;
+ nsCOMPtr<nsISupports> data;
+ rv = aItem->GetTransferData(PromiseFlatCString(aMIMEType).get(),
+ getter_AddRefs(data));
+ NS_ENSURE_SUCCESS(rv, false);
+
+ void* tmpData = nullptr;
+ uint32_t tmpDataLen = 0;
+
+ nsPrimitiveHelpers::CreateDataFromPrimitive(aMIMEType, data, &tmpData,
+ &tmpDataLen);
+ // if required, do the extra work to convert unicode to plain
+ // text and replace the output values with the plain text.
+ if (aNeedToDoConversionToPlainText) {
+ char* plainTextData = nullptr;
+ char16_t* castedUnicode = reinterpret_cast<char16_t*>(tmpData);
+ uint32_t plainTextLen = 0;
+ UTF16ToNewUTF8(castedUnicode, tmpDataLen / 2, &plainTextData,
+ &plainTextLen);
+ if (tmpData) {
+ // this was not allocated using glib
+ free(tmpData);
+ tmpData = plainTextData;
+ tmpDataLen = plainTextLen;
+ }
+ }
+ if (tmpData) {
+ // this copies the data
+ GdkAtom target = gtk_selection_data_get_target(aSelectionData);
+ gtk_selection_data_set(aSelectionData, target, 8, (guchar*)tmpData,
+ tmpDataLen);
+ // this wasn't allocated with glib
+ free(tmpData);
+ }
+
+ return true;
+}
+
+// We're asked to get data from mSourceDataItems and pass it to
+// GtkSelectionData (Gtk D&D interface).
+// We need to check mSourceDataItems data type and try to convert it
+// to data type accepted by Gtk.
+void nsDragService::SourceDataGet(GtkWidget* aWidget, GdkDragContext* aContext,
+ GtkSelectionData* aSelectionData,
+ guint32 aTime) {
+ LOGDRAGSERVICE("nsDragService::SourceDataGet(%p)", aContext);
+
+ GdkAtom target = gtk_selection_data_get_target(aSelectionData);
+ GUniquePtr<gchar> requestedTypeName(gdk_atom_name(target));
+ if (!requestedTypeName) {
+ LOGDRAGSERVICE(" failed to get atom name.\n");
+ return;
+ }
+
+ LOGDRAGSERVICE(" Gtk asks us for %s data type\n", requestedTypeName.get());
+ // check to make sure that we have data items to return.
+ if (!mSourceDataItems) {
+ LOGDRAGSERVICE(" Failed to get our data items\n");
+ return;
+ }
+
+ uint32_t dragItems;
+ mSourceDataItems->GetLength(&dragItems);
+ LOGDRAGSERVICE(" source data items %d", dragItems);
+
+ nsDependentCString mimeFlavor(requestedTypeName.get());
+ if (mimeFlavor.EqualsLiteral(gTextUriListType)) {
+ SourceDataGetUriList(aContext, aSelectionData, dragItems);
+ return;
+ }
+
+#ifdef MOZ_LOGGING
+ if (dragItems > 1) {
+ LOGDRAGSERVICE(
+ " There are %d data items but we're asked for %s MIME type. Only "
+ "first data element can be transfered!",
+ dragItems, mimeFlavor.get());
+ }
+#endif
+
+ nsCOMPtr<nsITransferable> item = do_QueryElementAt(mSourceDataItems, 0);
+ if (!item) {
+ LOGDRAGSERVICE(" Failed to get SourceDataItems!");
+ return;
+ }
+
+ if (mimeFlavor.EqualsLiteral(kTextMime) ||
+ mimeFlavor.EqualsLiteral(gTextPlainUTF8Type)) {
+ SourceDataGetText(item, nsDependentCString(kTextMime),
+ /* aNeedToDoConversionToPlainText */ true,
+ aSelectionData);
+ // no fallback for text mime types
+ return;
+ }
+ // Someone is asking for the special Direct Save Protocol type.
+ else if (mimeFlavor.EqualsLiteral(gXdndDirectSaveType)) {
+ SourceDataGetXDND(item, aContext, aSelectionData);
+ // no fallback for XDND mime types
+ return;
+ } else if (mimeFlavor.EqualsLiteral(kPNGImageMime) ||
+ mimeFlavor.EqualsLiteral(kJPEGImageMime) ||
+ mimeFlavor.EqualsLiteral(kJPGImageMime) ||
+ mimeFlavor.EqualsLiteral(kGIFImageMime)) {
+ // no fallback for image mime types
+ SourceDataGetImage(item, aSelectionData);
+ return;
+ } else if (mimeFlavor.EqualsLiteral(gMozUrlType)) {
+ // Someone was asking for _NETSCAPE_URL. We need to get it from
+ // transferable as x-moz-url and convert it to plain text.
+ // No need to check
+ if (SourceDataGetText(item, nsDependentCString(kURLMime),
+ /* aNeedToDoConversionToPlainText */ true,
+ aSelectionData)) {
+ return;
+ }
+ }
+ // Just try to get and set whatever we're asked for.
+ SourceDataGetText(item, mimeFlavor,
+ /* aNeedToDoConversionToPlainText */ false, aSelectionData);
+}
+
+void nsDragService::SourceBeginDrag(GdkDragContext* aContext) {
+ LOGDRAGSERVICE("nsDragService::SourceBeginDrag(%p)\n", aContext);
+
+ nsCOMPtr<nsITransferable> transferable =
+ do_QueryElementAt(mSourceDataItems, 0);
+ if (!transferable) return;
+
+ nsTArray<nsCString> flavors;
+ nsresult rv = transferable->FlavorsTransferableCanImport(flavors);
+ NS_ENSURE_SUCCESS(rv, );
+
+ for (uint32_t i = 0; i < flavors.Length(); ++i) {
+ if (flavors[i].EqualsLiteral(kFilePromiseDestFilename)) {
+ nsCOMPtr<nsISupports> data;
+ rv = transferable->GetTransferData(kFilePromiseDestFilename,
+ getter_AddRefs(data));
+ if (NS_FAILED(rv)) {
+ LOGDRAGSERVICE(" transferable doesn't contain '%s",
+ kFilePromiseDestFilename);
+ return;
+ }
+
+ nsCOMPtr<nsISupportsString> fileName = do_QueryInterface(data);
+ if (!fileName) {
+ LOGDRAGSERVICE(" failed to get file name");
+ return;
+ }
+
+ nsAutoString fileNameStr;
+ fileName->GetData(fileNameStr);
+
+ nsCString fileNameCStr;
+ CopyUTF16toUTF8(fileNameStr, fileNameCStr);
+
+ GdkAtom property = gdk_atom_intern(gXdndDirectSaveType, FALSE);
+ GdkAtom type = gdk_atom_intern(kTextMime, FALSE);
+
+ gdk_property_change(gdk_drag_context_get_source_window(aContext),
+ property, type, 8, GDK_PROP_MODE_REPLACE,
+ (const guchar*)fileNameCStr.get(),
+ fileNameCStr.Length());
+ break;
+ }
+ }
+}
+
+void nsDragService::SetDragIcon(GdkDragContext* aContext) {
+ if (!mHasImage && !mSelection) return;
+
+ LOGDRAGSERVICE("nsDragService::SetDragIcon(%p)", aContext);
+
+ LayoutDeviceIntRect dragRect;
+ nsPresContext* pc;
+ RefPtr<SourceSurface> surface;
+ DrawDrag(mSourceNode, mRegion, mScreenPosition, &dragRect, &surface, &pc);
+ if (!pc) {
+ LOGDRAGSERVICE(" PresContext is missing!");
+ return;
+ }
+
+ const auto screenPoint =
+ LayoutDeviceIntPoint::Round(mScreenPosition * pc->CSSToDevPixelScale());
+ int32_t offsetX = screenPoint.x - dragRect.x;
+ int32_t offsetY = screenPoint.y - dragRect.y;
+
+ // If a popup is set as the drag image, use its widget. Otherwise, use
+ // the surface that DrawDrag created.
+ //
+ // XXX: Disable drag popups on GTK 3.19.4 and above: see bug 1264454.
+ // Fix this once a new GTK version ships that does not destroy our
+ // widget in gtk_drag_set_icon_widget.
+ // This is fixed in GTK 3.24
+ // by
+ // https://gitlab.gnome.org/GNOME/gtk/-/commit/c27c4e2048acb630feb24c31288f802345e99f4c
+ bool gtk_drag_set_icon_widget_is_working =
+ gtk_check_version(3, 19, 4) != nullptr ||
+ gtk_check_version(3, 24, 0) == nullptr;
+ if (mDragPopup && gtk_drag_set_icon_widget_is_working) {
+ GtkWidget* gtkWidget = nullptr;
+ nsIFrame* frame = mDragPopup->GetPrimaryFrame();
+ if (frame) {
+ // DrawDrag ensured that this is a popup frame.
+ nsCOMPtr<nsIWidget> widget = frame->GetNearestWidget();
+ if (widget) {
+ gtkWidget = (GtkWidget*)widget->GetNativeData(NS_NATIVE_SHELLWIDGET);
+ if (gtkWidget) {
+ // When mDragPopup has a parent it's already attached to D&D context.
+ // That may happens when D&D operation is aborted but not finished
+ // on Gtk side yet so let's remove it now.
+ if (GtkWidget* parent = gtk_widget_get_parent(gtkWidget)) {
+ gtk_container_remove(GTK_CONTAINER(parent), gtkWidget);
+ }
+ LOGDRAGSERVICE(" set drag popup [%p]", widget.get());
+ OpenDragPopup();
+ gtk_drag_set_icon_widget(aContext, gtkWidget, offsetX, offsetY);
+ return;
+ } else {
+ LOGDRAGSERVICE(" NS_NATIVE_SHELLWIDGET is missing!");
+ }
+ } else {
+ LOGDRAGSERVICE(" NearestWidget is missing!");
+ }
+ } else {
+ LOGDRAGSERVICE(" PrimaryFrame is missing!");
+ }
+ }
+
+ if (surface) {
+ LOGDRAGSERVICE(" We have a surface");
+ if (!SetAlphaPixmap(surface, aContext, offsetX, offsetY, dragRect)) {
+ RefPtr<GdkPixbuf> dragPixbuf = nsImageToPixbuf::SourceSurfaceToPixbuf(
+ surface, dragRect.width, dragRect.height);
+ if (dragPixbuf) {
+ LOGDRAGSERVICE(" set drag pixbuf");
+ gtk_drag_set_icon_pixbuf(aContext, dragPixbuf, offsetX, offsetY);
+ } else {
+ LOGDRAGSERVICE(" SourceSurfaceToPixbuf failed!");
+ }
+ }
+ } else {
+ LOGDRAGSERVICE(" Surface is missing!");
+ }
+}
+
+static void invisibleSourceDragBegin(GtkWidget* aWidget,
+ GdkDragContext* aContext, gpointer aData) {
+ LOGDRAGSERVICESTATIC("invisibleSourceDragBegin (%p)", aContext);
+ nsDragService* dragService = (nsDragService*)aData;
+
+ dragService->SourceBeginDrag(aContext);
+ dragService->SetDragIcon(aContext);
+}
+
+static void invisibleSourceDragDataGet(GtkWidget* aWidget,
+ GdkDragContext* aContext,
+ GtkSelectionData* aSelectionData,
+ guint aInfo, guint32 aTime,
+ gpointer aData) {
+ LOGDRAGSERVICESTATIC("invisibleSourceDragDataGet (%p)", aContext);
+ nsDragService* dragService = (nsDragService*)aData;
+ dragService->SourceDataGet(aWidget, aContext, aSelectionData, aTime);
+}
+
+static gboolean invisibleSourceDragFailed(GtkWidget* aWidget,
+ GdkDragContext* aContext,
+ gint aResult, gpointer aData) {
+#ifdef MOZ_WAYLAND
+ // Wayland and X11 uses different drag results here. When drag target is
+ // missing X11 passes GDK_DRAG_CANCEL_NO_TARGET
+ // (from gdk_dnd_handle_button_event()/gdkdnd-x11.c)
+ // as backend X11 has info about other application windows.
+ // Wayland does not have such info so it always passes
+ // GDK_DRAG_CANCEL_ERROR error code
+ // (see data_source_cancelled/gdkselection-wayland.c).
+ // Bug 1527976
+ if (widget::GdkIsWaylandDisplay() && aResult == GTK_DRAG_RESULT_ERROR) {
+ for (GList* tmp = gdk_drag_context_list_targets(aContext); tmp;
+ tmp = tmp->next) {
+ GdkAtom atom = GDK_POINTER_TO_ATOM(tmp->data);
+ GUniquePtr<gchar> name(gdk_atom_name(atom));
+ if (name && !strcmp(name.get(), gTabDropType)) {
+ aResult = GTK_DRAG_RESULT_NO_TARGET;
+ LOGDRAGSERVICESTATIC("invisibleSourceDragFailed(%p): Wayland tab drop",
+ aContext);
+ break;
+ }
+ }
+ }
+#endif
+ LOGDRAGSERVICESTATIC("invisibleSourceDragFailed(%p) %s", aContext,
+ kGtkDragResults[aResult]);
+ nsDragService* dragService = (nsDragService*)aData;
+ // End the drag session now (rather than waiting for the drag-end signal)
+ // so that operations performed on dropEffect == none can start immediately
+ // rather than waiting for the drag-failed animation to finish.
+ dragService->SourceEndDragSession(aContext, aResult);
+
+ // We should return TRUE to disable the drag-failed animation iff the
+ // source performed an operation when dropEffect was none, but the handler
+ // of the dragend DOM event doesn't provide this information.
+ return FALSE;
+}
+
+static void invisibleSourceDragEnd(GtkWidget* aWidget, GdkDragContext* aContext,
+ gpointer aData) {
+ LOGDRAGSERVICESTATIC("invisibleSourceDragEnd(%p)", aContext);
+ nsDragService* dragService = (nsDragService*)aData;
+
+ // The drag has ended. Release the hostages!
+ dragService->SourceEndDragSession(aContext, GTK_DRAG_RESULT_SUCCESS);
+}
+
+// The following methods handle responding to GTK drag signals and
+// tracking state between these signals.
+//
+// In general, GTK does not expect us to run the event loop while handling its
+// drag signals, however our drag event handlers may run the
+// event loop, most often to fetch information about the drag data.
+//
+// GTK, for example, uses the return value from drag-motion signals to
+// determine whether drag-leave signals should be sent. If an event loop is
+// run during drag-motion the XdndLeave message can get processed but when GTK
+// receives the message it does not yet know that it needs to send the
+// drag-leave signal to our widget.
+//
+// After a drag-drop signal, we need to reply with gtk_drag_finish().
+// However, gtk_drag_finish should happen after the drag-drop signal handler
+// returns so that when the Motif drag protocol is used, the
+// XmTRANSFER_SUCCESS during gtk_drag_finish is sent after the XmDROP_START
+// reply sent on return from the drag-drop signal handler.
+//
+// Similarly drag-end for a successful drag and drag-failed are not good
+// times to run a nested event loop as gtk_drag_drop_finished() and
+// gtk_drag_source_info_destroy() don't gtk_drag_clear_source_info() or remove
+// drop_timeout until after at least the first of these signals is sent.
+// Processing other events (e.g. a slow GDK_DROP_FINISHED reply, or the drop
+// timeout) could cause gtk_drag_drop_finished to be called again with the
+// same GtkDragSourceInfo, which won't like being destroyed twice.
+//
+// Therefore we reply to the signals immediately and schedule a task to
+// dispatch the Gecko events, which may run the event loop.
+//
+// Action in response to drag-leave signals is also delayed until the event
+// loop runs again so that we find out whether a drag-drop signal follows.
+//
+// A single task is scheduled to manage responses to all three GTK signals.
+// If further signals are received while the task is scheduled, the scheduled
+// response is updated, sometimes effectively compressing successive signals.
+//
+// No Gecko drag events are dispatched (during nested event loops) while other
+// Gecko drag events are in flight. This helps event handlers that may not
+// expect nested events, while accessing an event's dataTransfer for example.
+
+gboolean nsDragService::ScheduleMotionEvent(nsWindow* aWindow,
+ GdkDragContext* aDragContext,
+ LayoutDeviceIntPoint aWindowPoint,
+ guint aTime) {
+ if (aDragContext && mScheduledTask == eDragTaskMotion) {
+ // The drag source has sent another motion message before we've
+ // replied to the previous. That shouldn't happen with Xdnd. The
+ // spec for Motif drags is less clear, but we'll just update the
+ // scheduled task with the new position reply only to the most
+ // recent message.
+ NS_WARNING("Drag Motion message received before previous reply was sent");
+ }
+
+ // Returning TRUE means we'll reply with a status message, unless we first
+ // get a leave.
+ return Schedule(eDragTaskMotion, aWindow, aDragContext, aWindowPoint, aTime);
+}
+
+void nsDragService::ScheduleLeaveEvent() {
+ // We don't know at this stage whether a drop signal will immediately
+ // follow. If the drop signal gets sent it will happen before we return
+ // to the main loop and the scheduled leave task will be replaced.
+ if (!Schedule(eDragTaskLeave, nullptr, nullptr, LayoutDeviceIntPoint(), 0)) {
+ NS_WARNING("Drag leave after drop");
+ }
+}
+
+gboolean nsDragService::ScheduleDropEvent(nsWindow* aWindow,
+ GdkDragContext* aDragContext,
+ LayoutDeviceIntPoint aWindowPoint,
+ guint aTime) {
+ if (!Schedule(eDragTaskDrop, aWindow, aDragContext, aWindowPoint, aTime)) {
+ NS_WARNING("Additional drag drop ignored");
+ return FALSE;
+ }
+
+ SetDragEndPoint(aWindowPoint);
+
+ // We'll reply with gtk_drag_finish().
+ return TRUE;
+}
+
+#ifdef MOZ_LOGGING
+const char* nsDragService::GetDragServiceTaskName(DragTask aTask) {
+ static const char* taskNames[] = {"eDragTaskNone", "eDragTaskMotion",
+ "eDragTaskLeave", "eDragTaskDrop",
+ "eDragTaskSourceEnd"};
+ MOZ_ASSERT(size_t(aTask) < ArrayLength(taskNames));
+ return taskNames[aTask];
+}
+#endif
+
+gboolean nsDragService::Schedule(DragTask aTask, nsWindow* aWindow,
+ GdkDragContext* aDragContext,
+ LayoutDeviceIntPoint aWindowPoint,
+ guint aTime) {
+ // If there is an existing leave or motion task scheduled, then that
+ // will be replaced. When the new task is run, it will dispatch
+ // any necessary leave or motion events.
+
+ // If aTask is eDragTaskSourceEnd, then it will replace even a scheduled
+ // drop event (which could happen if the drop event has not been processed
+ // within the allowed time). Otherwise, if we haven't yet run a scheduled
+ // drop or end task, just say that we are not ready to receive another
+ // drop.
+ LOGDRAGSERVICE("nsDragService::Schedule(%p) task %s window %p\n",
+ aDragContext, GetDragServiceTaskName(aTask), aWindow);
+
+ if (mScheduledTask == eDragTaskSourceEnd ||
+ (mScheduledTask == eDragTaskDrop && aTask != eDragTaskSourceEnd)) {
+ LOGDRAGSERVICE(" task does not fit recent task %s, quit!\n",
+ GetDragServiceTaskName(mScheduledTask));
+ return FALSE;
+ }
+
+ mScheduledTask = aTask;
+ mPendingWindow = aWindow;
+ mPendingDragContext = aDragContext;
+ mPendingWindowPoint = aWindowPoint;
+ mPendingTime = aTime;
+
+ if (!mTaskSource) {
+ // High priority is used here because we want to process motion events
+ // right after drag_motion event handler which is called by Gtk.
+ // An ideal scenario is to call TaskDispatchCallback() directly here
+ // but we can't do that. TaskDispatchCallback() spins gtk event loop
+ // while nsDragService::Schedule() is already called from event loop
+ // (by drag_motion* gtk_widget events) so that direct call will cause
+ // nested recursion.
+ mTaskSource = g_timeout_add_full(G_PRIORITY_HIGH, 0, TaskDispatchCallback,
+ this, nullptr);
+ }
+
+ // We need to reply to drag_motion event on Wayland immediately,
+ // see Bug 1730203.
+ if (widget::GdkIsWaylandDisplay() && mScheduledTask == eDragTaskMotion) {
+ UpdateDragAction(aDragContext);
+ ReplyToDragMotion(aDragContext, aTime);
+ }
+
+ return TRUE;
+}
+
+gboolean nsDragService::TaskDispatchCallback(gpointer data) {
+ RefPtr<nsDragService> dragService = static_cast<nsDragService*>(data);
+ AutoEventLoop loop(dragService);
+ return dragService->RunScheduledTask();
+}
+
+gboolean nsDragService::RunScheduledTask() {
+ LOGDRAGSERVICE(
+ "nsDragService::RunScheduledTask() task %s mTargetWindow %p "
+ "mPendingWindow %p\n",
+ GetDragServiceTaskName(mScheduledTask), mTargetWindow.get(),
+ mPendingWindow.get());
+
+ // Don't run RunScheduledTask() twice. As we use it in main thread only
+ // we don't need to be thread safe here.
+ if (mScheduledTaskIsRunning) {
+ LOGDRAGSERVICE(" sheduled task is already running, quit.");
+ return FALSE;
+ }
+ AutoRestore<bool> guard(mScheduledTaskIsRunning);
+ mScheduledTaskIsRunning = true;
+
+ if (mTargetWindow && mTargetWindow != mPendingWindow) {
+ LOGDRAGSERVICE(" dispatch eDragExit (%p)\n", mTargetWindow.get());
+ mTargetWindow->DispatchDragEvent(eDragExit, mTargetWindowPoint, 0);
+
+ if (!mSourceNode) {
+ // The drag that was initiated in a different app. End the drag
+ // session, since we're done with it for now (until the user drags
+ // back into this app).
+ EndDragSession(false, GetCurrentModifiers());
+ }
+ }
+
+ // It is possible that the pending state has been updated during dispatch
+ // of the leave event. That's fine.
+
+ // Now we collect the pending state because, from this point on, we want
+ // to use the same state for all events dispatched. All state is updated
+ // so that when other tasks are scheduled during dispatch here, this
+ // task is considered to have already been run.
+ bool positionHasChanged = mPendingWindow != mTargetWindow ||
+ mPendingWindowPoint != mTargetWindowPoint;
+ DragTask task = mScheduledTask;
+ mScheduledTask = eDragTaskNone;
+ mTargetWindow = std::move(mPendingWindow);
+ mTargetWindowPoint = mPendingWindowPoint;
+
+ if (task == eDragTaskLeave || task == eDragTaskSourceEnd) {
+ LOGDRAGSERVICE(" quit, selected task %s\n", GetDragServiceTaskName(task));
+ if (task == eDragTaskSourceEnd) {
+ // Dispatch drag end events.
+ EndDragSession(true, GetCurrentModifiers());
+ }
+
+ // Nothing more to do
+ // Returning false removes the task source from the event loop.
+ mTaskSource = 0;
+ return FALSE;
+ }
+
+ // This may be the start of a destination drag session.
+ StartDragSession();
+
+ // mTargetWidget may be nullptr if the window has been destroyed.
+ // (The leave event is not scheduled if a drop task is still scheduled.)
+ // We still reply appropriately to indicate that the drop will or didn't
+ // succeeed.
+ mTargetWidget = mTargetWindow ? mTargetWindow->GetGtkWidget() : nullptr;
+ LOGDRAGSERVICE(" start drag session mTargetWindow %p mTargetWidget %p\n",
+ mTargetWindow.get(), mTargetWidget.get());
+ LOGDRAGSERVICE(" mPendingDragContext %p => mTargetDragContext %p\n",
+ mPendingDragContext.get(), mTargetDragContext.get());
+ mTargetDragContext = std::move(mPendingDragContext);
+ mTargetTime = mPendingTime;
+
+ // http://www.whatwg.org/specs/web-apps/current-work/multipage/dnd.html#drag-and-drop-processing-model
+ // (as at 27 December 2010) indicates that a "drop" event should only be
+ // fired (at the current target element) if the current drag operation is
+ // not none. The current drag operation will only be set to a non-none
+ // value during a "dragover" event.
+ //
+ // If the user has ended the drag before any dragover events have been
+ // sent, then the spec recommends skipping the drop (because the current
+ // drag operation is none). However, here we assume that, by releasing
+ // the mouse button, the user has indicated that they want to drop, so we
+ // proceed with the drop where possible.
+ //
+ // In order to make the events appear to content in the same way as if the
+ // spec is being followed we make sure to dispatch a "dragover" event with
+ // appropriate coordinates and check canDrop before the "drop" event.
+ //
+ // When the Xdnd protocol is used for source/destination communication (as
+ // should be the case with GTK source applications) a dragover event
+ // should have already been sent during the drag-motion signal, which
+ // would have already been received because XdndDrop messages do not
+ // contain a position. However, we can't assume the same when the Motif
+ // protocol is used.
+ if (task == eDragTaskMotion || positionHasChanged) {
+ LOGDRAGSERVICE(" process motion event\n");
+ UpdateDragAction();
+ TakeDragEventDispatchedToChildProcess(); // Clear the old value.
+ DispatchMotionEvents();
+ if (task == eDragTaskMotion) {
+ if (TakeDragEventDispatchedToChildProcess()) {
+ mTargetDragContextForRemote = mTargetDragContext;
+ } else {
+ // Reply to tell the source whether we can drop and what
+ // action would be taken.
+ ReplyToDragMotion();
+ }
+ }
+ }
+
+ if (task == eDragTaskDrop) {
+ LOGDRAGSERVICE(" process drop task\n");
+ gboolean success = DispatchDropEvent();
+
+ // Perhaps we should set the del parameter to TRUE when the drag
+ // action is move, but we don't know whether the data was successfully
+ // transferred.
+ if (mTargetDragContext) {
+ LOGDRAGSERVICE(" drag finished\n");
+ gtk_drag_finish(mTargetDragContext, success,
+ /* del = */ FALSE, mTargetTime);
+ }
+ // Make sure to end the drag session. If this drag started in a
+ // different app, we won't get a drag_end signal to end it from.
+ EndDragSession(true, GetCurrentModifiers());
+ }
+
+ // We're done with the drag context.
+ LOGDRAGSERVICE(" clear mTargetWindow mTargetWidget and other data\n");
+ mTargetWidget = nullptr;
+ mTargetDragContext = nullptr;
+
+ // If we got another drag signal while running the sheduled task, that
+ // must have happened while running a nested event loop. Leave the task
+ // source on the event loop.
+ if (mScheduledTask != eDragTaskNone) return TRUE;
+
+ // We have no task scheduled.
+ // Returning false removes the task source from the event loop.
+ LOGDRAGSERVICE(" remove task source\n");
+ mTaskSource = 0;
+ return FALSE;
+}
+
+// This will update the drag action based on the information in the
+// drag context. Gtk gets this from a combination of the key settings
+// and what the source is offering.
+
+void nsDragService::UpdateDragAction(GdkDragContext* aDragContext) {
+ // This doesn't look right. dragSession.dragAction is used by
+ // nsContentUtils::SetDataTransferInEvent() to set the initial
+ // dataTransfer.dropEffect, so GdkDragContext::suggested_action would be
+ // more appropriate. GdkDragContext::actions should be used to set
+ // dataTransfer.effectAllowed, which doesn't currently happen with
+ // external sources.
+ LOGDRAGSERVICE("nsDragService::UpdateDragAction(%p)", aDragContext);
+
+ // default is to do nothing
+ int action = nsIDragService::DRAGDROP_ACTION_NONE;
+ GdkDragAction gdkAction = GDK_ACTION_DEFAULT;
+ if (aDragContext) {
+ gdkAction = gdk_drag_context_get_actions(aDragContext);
+ LOGDRAGSERVICE(" gdk_drag_context_get_actions() returns 0x%X", gdkAction);
+
+ // When D&D modifiers (CTRL/SHIFT) are involved,
+ // gdk_drag_context_get_actions() on X11 returns selected action but
+ // Wayland returns all allowed actions.
+
+ // So we need to call gdk_drag_context_get_selected_action() on Wayland
+ // to get potential D&D modifier.
+ // gdk_drag_context_get_selected_action() is also affected by
+ // gdk_drag_status(), see nsDragService::ReplyToDragMotion().
+ if (widget::GdkIsWaylandDisplay()) {
+ GdkDragAction gdkActionSelected =
+ gdk_drag_context_get_selected_action(aDragContext);
+ LOGDRAGSERVICE(" gdk_drag_context_get_selected_action() returns 0x%X",
+ gdkActionSelected);
+ if (gdkActionSelected) {
+ gdkAction = gdkActionSelected;
+ }
+ }
+ }
+
+ // set the default just in case nothing matches below
+ if (gdkAction & GDK_ACTION_DEFAULT) {
+ LOGDRAGSERVICE(" set default move");
+ action = nsIDragService::DRAGDROP_ACTION_MOVE;
+ }
+ // first check to see if move is set
+ if (gdkAction & GDK_ACTION_MOVE) {
+ LOGDRAGSERVICE(" set explicit move");
+ action = nsIDragService::DRAGDROP_ACTION_MOVE;
+ } else if (gdkAction & GDK_ACTION_LINK) {
+ // then fall to the others
+ LOGDRAGSERVICE(" set explicit link");
+ action = nsIDragService::DRAGDROP_ACTION_LINK;
+ } else if (gdkAction & GDK_ACTION_COPY) {
+ // copy is ctrl
+ LOGDRAGSERVICE(" set explicit copy");
+ action = nsIDragService::DRAGDROP_ACTION_COPY;
+ }
+
+ // update the drag information
+ SetDragAction(action);
+}
+
+void nsDragService::UpdateDragAction() { UpdateDragAction(mTargetDragContext); }
+
+NS_IMETHODIMP
+nsDragService::UpdateDragEffect() {
+ LOGDRAGSERVICE("nsDragService::UpdateDragEffect() from e10s child process");
+ if (mTargetDragContextForRemote) {
+ ReplyToDragMotion(mTargetDragContextForRemote, mTargetTime);
+ mTargetDragContextForRemote = nullptr;
+ }
+ return NS_OK;
+}
+
+void nsDragService::ReplyToDragMotion() {
+ if (mTargetDragContext) {
+ ReplyToDragMotion(mTargetDragContext, mTargetTime);
+ }
+}
+
+void nsDragService::DispatchMotionEvents() {
+ FireDragEventAtSource(eDrag, GetCurrentModifiers());
+ if (mTargetWindow) {
+ mTargetWindow->DispatchDragEvent(eDragOver, mTargetWindowPoint,
+ mTargetTime);
+ }
+}
+
+// Returns true if the drop was successful
+gboolean nsDragService::DispatchDropEvent() {
+ // We need to check IsDestroyed here because the nsRefPtr
+ // only protects this from being deleted, it does NOT protect
+ // against nsView::~nsView() calling Destroy() on it, bug 378273.
+ if (!mTargetWindow || mTargetWindow->IsDestroyed()) {
+ return FALSE;
+ }
+
+ EventMessage msg = mCanDrop ? eDrop : eDragExit;
+
+ mTargetWindow->DispatchDragEvent(msg, mTargetWindowPoint, mTargetTime);
+
+ return mCanDrop;
+}
+
+/* static */
+uint32_t nsDragService::GetCurrentModifiers() {
+ return mozilla::widget::KeymapWrapper::ComputeCurrentKeyModifiers();
+}
+
+#undef LOGDRAGSERVICE