The Tor Browser: layout/xul/nsXULTooltipListener.cpp@925c144e1f1f

     1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

     2 /* This Source Code Form is subject to the terms of the Mozilla Public

     3  * License, v. 2.0. If a copy of the MPL was not distributed with this

     4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     6 #include "nsXULTooltipListener.h"

     8 #include "nsIDOMMouseEvent.h"

     9 #include "nsIDOMXULDocument.h"

    10 #include "nsIDOMXULElement.h"

    11 #include "nsIDocument.h"

    12 #include "nsGkAtoms.h"

    13 #include "nsIPopupBoxObject.h"

    14 #include "nsMenuPopupFrame.h"

    15 #include "nsIServiceManager.h"

    16 #include "nsIDragService.h"

    17 #include "nsIDragSession.h"

    18 #ifdef MOZ_XUL

    19 #include "nsITreeView.h"

    20 #endif

    21 #include "nsIScriptContext.h"

    22 #include "nsPIDOMWindow.h"

    23 #ifdef MOZ_XUL

    24 #include "nsXULPopupManager.h"

    25 #endif

    26 #include "nsIRootBox.h"

    27 #include "nsIBoxObject.h"

    28 #include "mozilla/Preferences.h"

    29 #include "mozilla/LookAndFeel.h"

    30 #include "mozilla/dom/Element.h"

    31 #include "mozilla/dom/Event.h" // for nsIDOMEvent::InternalDOMEvent()

    33 using namespace mozilla;

    34 using namespace mozilla::dom;

    36 nsXULTooltipListener* nsXULTooltipListener::mInstance = nullptr;

    38 //////////////////////////////////////////////////////////////////////////

    39 //// nsISupports

    41 nsXULTooltipListener::nsXULTooltipListener()

    42   : mMouseScreenX(0)

    43   , mMouseScreenY(0)

    44   , mTooltipShownOnce(false)

    45 #ifdef MOZ_XUL

    46   , mIsSourceTree(false)

    47   , mNeedTitletip(false)

    48   , mLastTreeRow(-1)

    49 #endif

    50 {

    51   if (sTooltipListenerCount++ == 0) {

    52     // register the callback so we get notified of updates

    53     Preferences::RegisterCallback(ToolbarTipsPrefChanged,

    54                                   "browser.chrome.toolbar_tips");

    56     // Call the pref callback to initialize our state.

    57     ToolbarTipsPrefChanged("browser.chrome.toolbar_tips", nullptr);

    58   }

    59 }

    61 nsXULTooltipListener::~nsXULTooltipListener()

    62 {

    63   if (nsXULTooltipListener::mInstance == this) {

    64     ClearTooltipCache();

    65   }

    66   HideTooltip();

    68   if (--sTooltipListenerCount == 0) {

    69     // Unregister our pref observer

    70     Preferences::UnregisterCallback(ToolbarTipsPrefChanged,

    71                                     "browser.chrome.toolbar_tips");

    72   }

    73 }

    75 NS_IMPL_ISUPPORTS(nsXULTooltipListener, nsIDOMEventListener)

    77 void

    78 nsXULTooltipListener::MouseOut(nsIDOMEvent* aEvent)

    79 {

    80   // reset flag so that tooltip will display on the next MouseMove

    81   mTooltipShownOnce = false;

    83   // if the timer is running and no tooltip is shown, we

    84   // have to cancel the timer here so that it doesn't

    85   // show the tooltip if we move the mouse out of the window

    86   nsCOMPtr<nsIContent> currentTooltip = do_QueryReferent(mCurrentTooltip);

    87   if (mTooltipTimer && !currentTooltip) {

    88     mTooltipTimer->Cancel();

    89     mTooltipTimer = nullptr;

    90     return;

    91   }

    93 #ifdef DEBUG_crap

    94   if (mNeedTitletip)

    95     return;

    96 #endif

    98 #ifdef MOZ_XUL

    99   // check to see if the mouse left the targetNode, and if so,

   100   // hide the tooltip

   101   if (currentTooltip) {

   102     // which node did the mouse leave?

   103     nsCOMPtr<nsIDOMNode> targetNode = do_QueryInterface(

   104       aEvent->InternalDOMEvent()->GetTarget());

   106     nsXULPopupManager* pm = nsXULPopupManager::GetInstance();

   107     if (pm) {

   108       nsCOMPtr<nsIDOMNode> tooltipNode =

   109         pm->GetLastTriggerTooltipNode(currentTooltip->GetCurrentDoc());

   110       if (tooltipNode == targetNode) {

   111         // if the target node is the current tooltip target node, the mouse

   112         // left the node the tooltip appeared on, so close the tooltip.

   113         HideTooltip();

   114         // reset special tree tracking

   115         if (mIsSourceTree) {

   116           mLastTreeRow = -1;

   117           mLastTreeCol = nullptr;

   118         }

   119       }

   120     }

   121   }

   122 #endif

   123 }

   125 void

   126 nsXULTooltipListener::MouseMove(nsIDOMEvent* aEvent)

   127 {

   128   if (!sShowTooltips)

   129     return;

   131   // stash the coordinates of the event so that we can still get back to it from within the

   132   // timer callback. On win32, we'll get a MouseMove event even when a popup goes away --

   133   // even when the mouse doesn't change position! To get around this, we make sure the

   134   // mouse has really moved before proceeding.

   135   nsCOMPtr<nsIDOMMouseEvent> mouseEvent(do_QueryInterface(aEvent));

   136   if (!mouseEvent)

   137     return;

   138   int32_t newMouseX, newMouseY;

   139   mouseEvent->GetScreenX(&newMouseX);

   140   mouseEvent->GetScreenY(&newMouseY);

   142   // filter out false win32 MouseMove event

   143   if (mMouseScreenX == newMouseX && mMouseScreenY == newMouseY)

   144     return;

   146   // filter out minor movements due to crappy optical mice and shaky hands

   147   // to prevent tooltips from hiding prematurely.

   148   nsCOMPtr<nsIContent> currentTooltip = do_QueryReferent(mCurrentTooltip);

   150   if ((currentTooltip) &&

   151       (abs(mMouseScreenX - newMouseX) <= kTooltipMouseMoveTolerance) &&

   152       (abs(mMouseScreenY - newMouseY) <= kTooltipMouseMoveTolerance))

   153     return;

   154   mMouseScreenX = newMouseX;

   155   mMouseScreenY = newMouseY;

   157   nsCOMPtr<nsIContent> sourceContent = do_QueryInterface(

   158     aEvent->InternalDOMEvent()->GetCurrentTarget());

   159   mSourceNode = do_GetWeakReference(sourceContent);

   160 #ifdef MOZ_XUL

   161   mIsSourceTree = sourceContent->Tag() == nsGkAtoms::treechildren;

   162   if (mIsSourceTree)

   163     CheckTreeBodyMove(mouseEvent);

   164 #endif

   166   // as the mouse moves, we want to make sure we reset the timer to show it,

   167   // so that the delay is from when the mouse stops moving, not when it enters

   168   // the node.

   169   KillTooltipTimer();

   171   // If the mouse moves while the tooltip is up, hide it. If nothing is

   172   // showing and the tooltip hasn't been displayed since the mouse entered

   173   // the node, then start the timer to show the tooltip.

   174   if (!currentTooltip && !mTooltipShownOnce) {

   175     nsCOMPtr<EventTarget> eventTarget = aEvent->InternalDOMEvent()->GetTarget();

   177     // don't show tooltips attached to elements outside of a menu popup

   178     // when hovering over an element inside it. The popupsinherittooltip

   179     // attribute may be used to disable this behaviour, which is useful for

   180     // large menu hierarchies such as bookmarks.

   181     if (!sourceContent->AttrValueIs(kNameSpaceID_None, nsGkAtoms::popupsinherittooltip,

   182                                     nsGkAtoms::_true, eCaseMatters)) {

   183       nsCOMPtr<nsIContent> targetContent = do_QueryInterface(eventTarget);

   184       while (targetContent && targetContent != sourceContent) {

   185         nsIAtom* tag = targetContent->Tag();

   186         if (targetContent->GetNameSpaceID() == kNameSpaceID_XUL &&

   187             (tag == nsGkAtoms::menupopup ||

   188              tag == nsGkAtoms::panel ||

   189              tag == nsGkAtoms::tooltip)) {

   190           mSourceNode = nullptr;

   191           return;

   192         }

   194         targetContent = targetContent->GetParent();

   195       }

   196     }

   198     mTooltipTimer = do_CreateInstance("@mozilla.org/timer;1");

   199     if (mTooltipTimer) {

   200       mTargetNode = do_GetWeakReference(eventTarget);

   201       if (mTargetNode) {

   202         nsresult rv =

   203           mTooltipTimer->InitWithFuncCallback(sTooltipCallback, this,

   204             LookAndFeel::GetInt(LookAndFeel::eIntID_TooltipDelay, 500),

   205             nsITimer::TYPE_ONE_SHOT);

   206         if (NS_FAILED(rv)) {

   207           mTargetNode = nullptr;

   208           mSourceNode = nullptr;

   209         }

   210       }

   211     }

   212     return;

   213   }

   215 #ifdef MOZ_XUL

   216   if (mIsSourceTree)

   217     return;

   218 #endif

   220   HideTooltip();

   221   // set a flag so that the tooltip is only displayed once until the mouse

   222   // leaves the node

   223   mTooltipShownOnce = true;

   224 }

   226 NS_IMETHODIMP

   227 nsXULTooltipListener::HandleEvent(nsIDOMEvent* aEvent)

   228 {

   229   nsAutoString type;

   230   aEvent->GetType(type);

   231   if (type.EqualsLiteral("DOMMouseScroll") ||

   232       type.EqualsLiteral("keydown") ||

   233       type.EqualsLiteral("mousedown") ||

   234       type.EqualsLiteral("mouseup") ||

   235       type.EqualsLiteral("dragstart")) {

   236     HideTooltip();

   237     return NS_OK;

   238   }

   240   if (type.EqualsLiteral("popuphiding")) {

   241     DestroyTooltip();

   242     return NS_OK;

   243   }

   245   // Note that mousemove, mouseover and mouseout might be

   246   // fired even during dragging due to widget's bug.

   247   nsCOMPtr<nsIDragService> dragService =

   248     do_GetService("@mozilla.org/widget/dragservice;1");

   249   NS_ENSURE_TRUE(dragService, NS_OK);

   250   nsCOMPtr<nsIDragSession> dragSession;

   251   dragService->GetCurrentSession(getter_AddRefs(dragSession));

   252   if (dragSession) {

   253     return NS_OK;

   254   }

   256   // Not dragging.

   258   if (type.EqualsLiteral("mousemove")) {

   259     MouseMove(aEvent);

   260     return NS_OK;

   261   }

   263   if (type.EqualsLiteral("mouseout")) {

   264     MouseOut(aEvent);

   265     return NS_OK;

   266   }

   268   return NS_OK;

   269 }

   271 //////////////////////////////////////////////////////////////////////////

   272 //// nsXULTooltipListener

   274 // static

   275 void

   276 nsXULTooltipListener::ToolbarTipsPrefChanged(const char *aPref,

   277                                              void *aClosure)

   278 {

   279   sShowTooltips =

   280     Preferences::GetBool("browser.chrome.toolbar_tips", sShowTooltips);

   281 }

   283 //////////////////////////////////////////////////////////////////////////

   284 //// nsXULTooltipListener

   286 bool nsXULTooltipListener::sShowTooltips = false;

   287 uint32_t nsXULTooltipListener::sTooltipListenerCount = 0;

   289 nsresult

   290 nsXULTooltipListener::AddTooltipSupport(nsIContent* aNode)

   291 {

   292   if (!aNode)

   293     return NS_ERROR_NULL_POINTER;

   295   aNode->AddSystemEventListener(NS_LITERAL_STRING("mouseout"), this,

   296                                 false, false);

   297   aNode->AddSystemEventListener(NS_LITERAL_STRING("mousemove"), this,

   298                                 false, false);

   299   aNode->AddSystemEventListener(NS_LITERAL_STRING("mousedown"), this,

   300                                 false, false);

   301   aNode->AddSystemEventListener(NS_LITERAL_STRING("mouseup"), this,

   302                                 false, false);

   303   aNode->AddSystemEventListener(NS_LITERAL_STRING("dragstart"), this,

   304                                 true, false);

   306   return NS_OK;

   307 }

   309 nsresult

   310 nsXULTooltipListener::RemoveTooltipSupport(nsIContent* aNode)

   311 {

   312   if (!aNode)

   313     return NS_ERROR_NULL_POINTER;

   315   aNode->RemoveSystemEventListener(NS_LITERAL_STRING("mouseout"), this, false);

   316   aNode->RemoveSystemEventListener(NS_LITERAL_STRING("mousemove"), this, false);

   317   aNode->RemoveSystemEventListener(NS_LITERAL_STRING("mousedown"), this, false);

   318   aNode->RemoveSystemEventListener(NS_LITERAL_STRING("mouseup"), this, false);

   319   aNode->RemoveSystemEventListener(NS_LITERAL_STRING("dragstart"), this, true);

   321   return NS_OK;

   322 }

   324 #ifdef MOZ_XUL

   325 void

   326 nsXULTooltipListener::CheckTreeBodyMove(nsIDOMMouseEvent* aMouseEvent)

   327 {

   328   nsCOMPtr<nsIContent> sourceNode = do_QueryReferent(mSourceNode);

   329   if (!sourceNode)

   330     return;

   332   // get the boxObject of the documentElement of the document the tree is in

   333   nsCOMPtr<nsIBoxObject> bx;

   334   nsIDocument* doc = sourceNode->GetDocument();

   335   if (doc) {

   336     ErrorResult ignored;

   337     bx = doc->GetBoxObjectFor(doc->GetRootElement(), ignored);

   338   }

   340   nsCOMPtr<nsITreeBoxObject> obx;

   341   GetSourceTreeBoxObject(getter_AddRefs(obx));

   342   if (bx && obx) {

   343     int32_t x, y;

   344     aMouseEvent->GetScreenX(&x);

   345     aMouseEvent->GetScreenY(&y);

   347     int32_t row;

   348     nsCOMPtr<nsITreeColumn> col;

   349     nsAutoCString obj;

   351     // subtract off the documentElement's boxObject

   352     int32_t boxX, boxY;

   353     bx->GetScreenX(&boxX);

   354     bx->GetScreenY(&boxY);

   355     x -= boxX;

   356     y -= boxY;

   358     obx->GetCellAt(x, y, &row, getter_AddRefs(col), obj);

   360     // determine if we are going to need a titletip

   361     // XXX check the disabletitletips attribute on the tree content

   362     mNeedTitletip = false;

   363     if (row >= 0 && obj.EqualsLiteral("text")) {

   364       obx->IsCellCropped(row, col, &mNeedTitletip);

   365     }

   367     nsCOMPtr<nsIContent> currentTooltip = do_QueryReferent(mCurrentTooltip);

   368     if (currentTooltip && (row != mLastTreeRow || col != mLastTreeCol)) {

   369       HideTooltip();

   370     }

   372     mLastTreeRow = row;

   373     mLastTreeCol = col;

   374   }

   375 }

   376 #endif

   378 nsresult

   379 nsXULTooltipListener::ShowTooltip()

   380 {

   381   nsCOMPtr<nsIContent> sourceNode = do_QueryReferent(mSourceNode);

   383   // get the tooltip content designated for the target node

   384   nsCOMPtr<nsIContent> tooltipNode;

   385   GetTooltipFor(sourceNode, getter_AddRefs(tooltipNode));

   386   if (!tooltipNode || sourceNode == tooltipNode)

   387     return NS_ERROR_FAILURE; // the target node doesn't need a tooltip

   389   // set the node in the document that triggered the tooltip and show it

   390   nsCOMPtr<nsIDOMXULDocument> xulDoc(do_QueryInterface(tooltipNode->GetDocument()));

   391   if (xulDoc) {

   392     // Make sure the target node is still attached to some document.

   393     // It might have been deleted.

   394     if (sourceNode->GetDocument()) {

   395 #ifdef MOZ_XUL

   396       if (!mIsSourceTree) {

   397         mLastTreeRow = -1;

   398         mLastTreeCol = nullptr;

   399       }

   400 #endif

   402       mCurrentTooltip = do_GetWeakReference(tooltipNode);

   403       LaunchTooltip();

   404       mTargetNode = nullptr;

   406       nsCOMPtr<nsIContent> currentTooltip = do_QueryReferent(mCurrentTooltip);

   407       if (!currentTooltip)

   408         return NS_OK;

   410       // listen for popuphidden on the tooltip node, so that we can

   411       // be sure DestroyPopup is called even if someone else closes the tooltip

   412       currentTooltip->AddSystemEventListener(NS_LITERAL_STRING("popuphiding"),

   413                                              this, false, false);

   415       // listen for mousedown, mouseup, keydown, and DOMMouseScroll events at document level

   416       nsIDocument* doc = sourceNode->GetDocument();

   417       if (doc) {

   418         // Probably, we should listen to untrusted events for hiding tooltips

   419         // on content since tooltips might disturb something of web

   420         // applications.  If we don't specify the aWantsUntrusted of

   421         // AddSystemEventListener(), the event target sets it to TRUE if the

   422         // target is in content.

   423         doc->AddSystemEventListener(NS_LITERAL_STRING("DOMMouseScroll"),

   424                                     this, true);

   425         doc->AddSystemEventListener(NS_LITERAL_STRING("mousedown"),

   426                                     this, true);

   427         doc->AddSystemEventListener(NS_LITERAL_STRING("mouseup"),

   428                                     this, true);

   429         doc->AddSystemEventListener(NS_LITERAL_STRING("keydown"),

   430                                     this, true);

   431       }

   432       mSourceNode = nullptr;

   433     }

   434   }

   436   return NS_OK;

   437 }

   439 #ifdef MOZ_XUL

   440 // XXX: "This stuff inside DEBUG_crap could be used to make tree tooltips work

   441 //       in the future."

   442 #ifdef DEBUG_crap

   443 static void

   444 GetTreeCellCoords(nsITreeBoxObject* aTreeBox, nsIContent* aSourceNode,

   445                   int32_t aRow, nsITreeColumn* aCol, int32_t* aX, int32_t* aY)

   446 {

   447   int32_t junk;

   448   aTreeBox->GetCoordsForCellItem(aRow, aCol, EmptyCString(), aX, aY, &junk, &junk);

   449   nsCOMPtr<nsIDOMXULElement> xulEl(do_QueryInterface(aSourceNode));

   450   nsCOMPtr<nsIBoxObject> bx;

   451   xulEl->GetBoxObject(getter_AddRefs(bx));

   452   int32_t myX, myY;

   453   bx->GetX(&myX);

   454   bx->GetY(&myY);

   455   *aX += myX;

   456   *aY += myY;

   457 }

   458 #endif

   460 static void

   461 SetTitletipLabel(nsITreeBoxObject* aTreeBox, nsIContent* aTooltip,

   462                  int32_t aRow, nsITreeColumn* aCol)

   463 {

   464   nsCOMPtr<nsITreeView> view;

   465   aTreeBox->GetView(getter_AddRefs(view));

   466   if (view) {

   467     nsAutoString label;

   468 #ifdef DEBUG

   469     nsresult rv =

   470 #endif

   471       view->GetCellText(aRow, aCol, label);

   472     NS_WARN_IF_FALSE(NS_SUCCEEDED(rv), "Couldn't get the cell text!");

   473     aTooltip->SetAttr(kNameSpaceID_None, nsGkAtoms::label, label, true);

   474   }

   475 }

   476 #endif

   478 void

   479 nsXULTooltipListener::LaunchTooltip()

   480 {

   481   nsCOMPtr<nsIContent> currentTooltip = do_QueryReferent(mCurrentTooltip);

   482   if (!currentTooltip)

   483     return;

   485 #ifdef MOZ_XUL

   486   if (mIsSourceTree && mNeedTitletip) {

   487     nsCOMPtr<nsITreeBoxObject> obx;

   488     GetSourceTreeBoxObject(getter_AddRefs(obx));

   490     SetTitletipLabel(obx, currentTooltip, mLastTreeRow, mLastTreeCol);

   491     if (!(currentTooltip = do_QueryReferent(mCurrentTooltip))) {

   492       // Because of mutation events, currentTooltip can be null.

   493       return;

   494     }

   495     currentTooltip->SetAttr(kNameSpaceID_None, nsGkAtoms::titletip, NS_LITERAL_STRING("true"), true);

   496   } else {

   497     currentTooltip->UnsetAttr(kNameSpaceID_None, nsGkAtoms::titletip, true);

   498   }

   499   if (!(currentTooltip = do_QueryReferent(mCurrentTooltip))) {

   500     // Because of mutation events, currentTooltip can be null.

   501     return;

   502   }

   504   nsXULPopupManager* pm = nsXULPopupManager::GetInstance();

   505   if (pm) {

   506     nsCOMPtr<nsIContent> target = do_QueryReferent(mTargetNode);

   507     pm->ShowTooltipAtScreen(currentTooltip, target, mMouseScreenX, mMouseScreenY);

   509     // Clear the current tooltip if the popup was not opened successfully.

   510     if (!pm->IsPopupOpen(currentTooltip))

   511       mCurrentTooltip = nullptr;

   512   }

   513 #endif

   515 }

   517 nsresult

   518 nsXULTooltipListener::HideTooltip()

   519 {

   520 #ifdef MOZ_XUL

   521   nsCOMPtr<nsIContent> currentTooltip = do_QueryReferent(mCurrentTooltip);

   522   if (currentTooltip) {

   523     nsXULPopupManager* pm = nsXULPopupManager::GetInstance();

   524     if (pm)

   525       pm->HidePopup(currentTooltip, false, false, false, false);

   526   }

   527 #endif

   529   DestroyTooltip();

   530   return NS_OK;

   531 }

   533 static void

   534 GetImmediateChild(nsIContent* aContent, nsIAtom *aTag, nsIContent** aResult)

   535 {

   536   *aResult = nullptr;

   537   uint32_t childCount = aContent->GetChildCount();

   538   for (uint32_t i = 0; i < childCount; i++) {

   539     nsIContent *child = aContent->GetChildAt(i);

   541     if (child->Tag() == aTag) {

   542       *aResult = child;

   543       NS_ADDREF(*aResult);

   544       return;

   545     }

   546   }

   548   return;

   549 }

   551 nsresult

   552 nsXULTooltipListener::FindTooltip(nsIContent* aTarget, nsIContent** aTooltip)

   553 {

   554   if (!aTarget)

   555     return NS_ERROR_NULL_POINTER;

   557   // before we go on, make sure that target node still has a window

   558   nsIDocument *document = aTarget->GetDocument();

   559   if (!document) {

   560     NS_WARNING("Unable to retrieve the tooltip node document.");

   561     return NS_ERROR_FAILURE;

   562   }

   563   nsPIDOMWindow *window = document->GetWindow();

   564   if (!window) {

   565     return NS_OK;

   566   }

   568   bool closed;

   569   window->GetClosed(&closed);

   571   if (closed) {

   572     return NS_OK;

   573   }

   575   nsAutoString tooltipText;

   576   aTarget->GetAttr(kNameSpaceID_None, nsGkAtoms::tooltiptext, tooltipText);

   577   if (!tooltipText.IsEmpty()) {

   578     // specifying tooltiptext means we will always use the default tooltip

   579     nsIRootBox* rootBox = nsIRootBox::GetRootBox(document->GetShell());

   580     NS_ENSURE_STATE(rootBox);

   581     *aTooltip = rootBox->GetDefaultTooltip();

   582     if (*aTooltip) {

   583       NS_ADDREF(*aTooltip);

   584       (*aTooltip)->SetAttr(kNameSpaceID_None, nsGkAtoms::label, tooltipText, true);

   585     }

   586     return NS_OK;

   587   }

   589   nsAutoString tooltipId;

   590   aTarget->GetAttr(kNameSpaceID_None, nsGkAtoms::tooltip, tooltipId);

   592   // if tooltip == _child, look for first <tooltip> child

   593   if (tooltipId.EqualsLiteral("_child")) {

   594     GetImmediateChild(aTarget, nsGkAtoms::tooltip, aTooltip);

   595     return NS_OK;

   596   }

   598   if (!tooltipId.IsEmpty()) {

   599     // tooltip must be an id, use getElementById to find it

   600     nsCOMPtr<nsIContent> tooltipEl = document->GetElementById(tooltipId);

   602     if (tooltipEl) {

   603 #ifdef MOZ_XUL

   604       mNeedTitletip = false;

   605 #endif

   606       tooltipEl.forget(aTooltip);

   607       return NS_OK;

   608     }

   609   }

   611 #ifdef MOZ_XUL

   612   // titletips should just use the default tooltip

   613   if (mIsSourceTree && mNeedTitletip) {

   614     nsIRootBox* rootBox = nsIRootBox::GetRootBox(document->GetShell());

   615     NS_ENSURE_STATE(rootBox);

   616     NS_IF_ADDREF(*aTooltip = rootBox->GetDefaultTooltip());

   617   }

   618 #endif

   620   return NS_OK;

   621 }

   624 nsresult

   625 nsXULTooltipListener::GetTooltipFor(nsIContent* aTarget, nsIContent** aTooltip)

   626 {

   627   *aTooltip = nullptr;

   628   nsCOMPtr<nsIContent> tooltip;

   629   nsresult rv = FindTooltip(aTarget, getter_AddRefs(tooltip));

   630   if (NS_FAILED(rv) || !tooltip) {

   631     return rv;

   632   }

   634 #ifdef MOZ_XUL

   635   // Submenus can't be used as tooltips, see bug 288763.

   636   nsIContent* parent = tooltip->GetParent();

   637   if (parent) {

   638     nsMenuFrame* menu = do_QueryFrame(parent->GetPrimaryFrame());

   639     if (menu) {

   640       NS_WARNING("Menu cannot be used as a tooltip");

   641       return NS_ERROR_FAILURE;

   642     }

   643   }

   644 #endif

   646   tooltip.swap(*aTooltip);

   647   return rv;

   648 }

   650 nsresult

   651 nsXULTooltipListener::DestroyTooltip()

   652 {

   653   nsCOMPtr<nsIDOMEventListener> kungFuDeathGrip(this);

   654   nsCOMPtr<nsIContent> currentTooltip = do_QueryReferent(mCurrentTooltip);

   655   if (currentTooltip) {

   656     // release tooltip before removing listener to prevent our destructor from

   657     // being called recursively (bug 120863)

   658     mCurrentTooltip = nullptr;

   660     // clear out the tooltip node on the document

   661     nsCOMPtr<nsIDocument> doc = currentTooltip->GetDocument();

   662     if (doc) {

   663       // remove the mousedown and keydown listener from document

   664       doc->RemoveSystemEventListener(NS_LITERAL_STRING("DOMMouseScroll"), this,

   665                                      true);

   666       doc->RemoveSystemEventListener(NS_LITERAL_STRING("mousedown"), this,

   667                                      true);

   668       doc->RemoveSystemEventListener(NS_LITERAL_STRING("mouseup"), this, true);

   669       doc->RemoveSystemEventListener(NS_LITERAL_STRING("keydown"), this, true);

   670     }

   672     // remove the popuphidden listener from tooltip

   673     currentTooltip->RemoveSystemEventListener(NS_LITERAL_STRING("popuphiding"), this, false);

   674   }

   676   // kill any ongoing timers

   677   KillTooltipTimer();

   678   mSourceNode = nullptr;

   679 #ifdef MOZ_XUL

   680   mLastTreeCol = nullptr;

   681 #endif

   683   return NS_OK;

   684 }

   686 void

   687 nsXULTooltipListener::KillTooltipTimer()

   688 {

   689   if (mTooltipTimer) {

   690     mTooltipTimer->Cancel();

   691     mTooltipTimer = nullptr;

   692     mTargetNode = nullptr;

   693   }

   694 }

   696 void

   697 nsXULTooltipListener::sTooltipCallback(nsITimer *aTimer, void *aListener)

   698 {

   699   nsRefPtr<nsXULTooltipListener> instance = mInstance;

   700   if (instance)

   701     instance->ShowTooltip();

   702 }

   704 #ifdef MOZ_XUL

   705 nsresult

   706 nsXULTooltipListener::GetSourceTreeBoxObject(nsITreeBoxObject** aBoxObject)

   707 {

   708   *aBoxObject = nullptr;

   710   nsCOMPtr<nsIContent> sourceNode = do_QueryReferent(mSourceNode);

   711   if (mIsSourceTree && sourceNode) {

   712     nsCOMPtr<nsIDOMXULElement> xulEl(do_QueryInterface(sourceNode->GetParent()));

   713     if (xulEl) {

   714       nsCOMPtr<nsIBoxObject> bx;

   715       xulEl->GetBoxObject(getter_AddRefs(bx));

   716       nsCOMPtr<nsITreeBoxObject> obx(do_QueryInterface(bx));

   717       if (obx) {

   718         *aBoxObject = obx;

   719         NS_ADDREF(*aBoxObject);

   720         return NS_OK;

   721       }

   722     }

   723   }

   724   return NS_ERROR_FAILURE;

   725 }

   726 #endif

The Tor Browser / file revision

layout/xul/nsXULTooltipListener.cpp@925c144e1f1f

layout/xul/nsXULTooltipListener.cpp