Bug 837242. Part 1: Convert bool parameters to flags. r=mats

--HG--
extra : rebase_source : e59fe41c41f2be6b4f0c78528cf954093f3011bd

content/base/src/nsDocument.cpp

@@ -3137,8 +3137,9 @@ nsDocument::ElementFromPointHelper(float aX, float aY,
     return nullptr; // return null to premature XUL callers as a reminder to wait
   }
 
-  nsIFrame *ptFrame = nsLayoutUtils::GetFrameForPoint(rootFrame, pt, true,
-                                                      aIgnoreRootScrollFrame);
+  nsIFrame *ptFrame = nsLayoutUtils::GetFrameForPoint(rootFrame, pt,
+    nsLayoutUtils::IGNORE_PAINT_SUPPRESSION |
+    (aIgnoreRootScrollFrame ? nsLayoutUtils::IGNORE_ROOT_SCROLL_FRAME : 0));
   if (!ptFrame) {
     return nullptr;
   }
@@ -3192,7 +3193,8 @@ nsDocument::NodesFromRectHelper(float aX, float aY,
 
   nsAutoTArray<nsIFrame*,8> outFrames;
   nsLayoutUtils::GetFramesForArea(rootFrame, rect, outFrames,
-                                  true, aIgnoreRootScrollFrame);
+    nsLayoutUtils::IGNORE_PAINT_SUPPRESSION |
+    (aIgnoreRootScrollFrame ? nsLayoutUtils::IGNORE_ROOT_SCROLL_FRAME : 0));
 
   // Used to filter out repeated elements in sequence.
   nsIContent* lastAdded = nullptr;
@@ -9323,8 +9325,8 @@ nsIDocument::CaretPositionFromPoint(float aX, float aY)
     return nullptr;
   }
 
-  nsIFrame *ptFrame = nsLayoutUtils::GetFrameForPoint(rootFrame, pt, true,
-                                                      false);
+  nsIFrame *ptFrame = nsLayoutUtils::GetFrameForPoint(rootFrame, pt,
+      nsLayoutUtils::IGNORE_PAINT_SUPPRESSION);
   if (!ptFrame) {
     return nullptr;
   }

layout/base/PositionedEventTargeting.cpp

@@ -249,10 +249,10 @@ FindFrameTargetedByInputEvent(const nsGUIEvent *aEvent,
                               const nsPoint& aPointRelativeToRootFrame,
                               uint32_t aFlags)
 {
-  bool ignoreRootScrollFrame = (aFlags & INPUT_IGNORE_ROOT_SCROLL_FRAME) != 0;
+  uint32_t flags = (aFlags & INPUT_IGNORE_ROOT_SCROLL_FRAME) ?
+     nsLayoutUtils::IGNORE_ROOT_SCROLL_FRAME : 0;
   nsIFrame* target =
-    nsLayoutUtils::GetFrameForPoint(aRootFrame, aPointRelativeToRootFrame,
-                                    false, ignoreRootScrollFrame);
+    nsLayoutUtils::GetFrameForPoint(aRootFrame, aPointRelativeToRootFrame, flags);
 
   const EventRadiusPrefs* prefs = GetPrefsFor(aEvent->eventStructType);
   if (!prefs || !prefs->mEnabled || (target && IsElementClickable(target))) {
@@ -271,7 +271,7 @@ FindFrameTargetedByInputEvent(const nsGUIEvent *aEvent,
   nsRect targetRect = GetTargetRect(aRootFrame, aPointRelativeToRootFrame, prefs);
   nsAutoTArray<nsIFrame*,8> candidates;
   nsresult rv = nsLayoutUtils::GetFramesForArea(aRootFrame, targetRect, candidates,
-                                                false, ignoreRootScrollFrame);
+      flags | nsLayoutUtils::EXCLUDE_COVERED_FRAMES);
   if (NS_FAILED(rv)) {
     return target;
   }

layout/base/nsLayoutUtils.cpp

@@ -1802,15 +1802,12 @@ nsLayoutUtils::GetRemoteContentIds(nsIFrame* aFrame,
 }
 
 nsIFrame*
-nsLayoutUtils::GetFrameForPoint(nsIFrame* aFrame, nsPoint aPt,
-                                bool aShouldIgnoreSuppression,
-                                bool aIgnoreRootScrollFrame)
+nsLayoutUtils::GetFrameForPoint(nsIFrame* aFrame, nsPoint aPt, uint32_t aFlags)
 {
   PROFILER_LABEL("nsLayoutUtils", "GetFrameForPoint");
   nsresult rv;
   nsAutoTArray<nsIFrame*,8> outFrames;
-  rv = GetFramesForArea(aFrame, nsRect(aPt, nsSize(1, 1)), outFrames,
-                        aShouldIgnoreSuppression, aIgnoreRootScrollFrame);
+  rv = GetFramesForArea(aFrame, nsRect(aPt, nsSize(1, 1)), outFrames, aFlags);
   NS_ENSURE_SUCCESS(rv, nullptr);
   return outFrames.Length() ? outFrames.ElementAt(0) : nullptr;
 }
@@ -1818,8 +1815,7 @@ nsLayoutUtils::GetFrameForPoint(nsIFrame* aFrame, nsPoint aPt,
 nsresult
 nsLayoutUtils::GetFramesForArea(nsIFrame* aFrame, const nsRect& aRect,
                                 nsTArray<nsIFrame*> &aOutFrames,
-                                bool aShouldIgnoreSuppression,
-                                bool aIgnoreRootScrollFrame)
+                                uint32_t aFlags)
 {
   PROFILER_LABEL("nsLayoutUtils","GetFramesForArea");
   nsDisplayListBuilder builder(aFrame, nsDisplayListBuilder::EVENT_DELIVERY,
@@ -1827,11 +1823,11 @@ nsLayoutUtils::GetFramesForArea(nsIFrame* aFrame, const nsRect& aRect,
   nsDisplayList list;
   nsRect target(aRect);
 
-  if (aShouldIgnoreSuppression) {
+  if (aFlags & IGNORE_PAINT_SUPPRESSION) {
     builder.IgnorePaintSuppression();
   }
 
-  if (aIgnoreRootScrollFrame) {
+  if (aFlags & IGNORE_ROOT_SCROLL_FRAME) {
     nsIFrame* rootScrollFrame =
       aFrame->PresContext()->PresShell()->GetRootScrollFrame();
     if (rootScrollFrame) {

layout/base/nsLayoutUtils.h

@@ -526,19 +526,28 @@ public:
                                      nsTArray<ViewID> &aOutIDs,
                                      bool aIgnoreRootScrollFrame);
 
+  enum FrameForPointFlags {
+    /**
+     * When set, paint suppression is ignored, so we'll return non-root page
+     * elements even if paint suppression is stopping them from painting.
+     */
+    IGNORE_PAINT_SUPPRESSION = 0x01,
+    /**
+     * When set, clipping due to the root scroll frame (and any other viewport-
+     * related clipping) is ignored.
+     */
+    IGNORE_ROOT_SCROLL_FRAME = 0x02
+  };
+
   /**
    * Given aFrame, the root frame of a stacking context, find its descendant
    * frame under the point aPt that receives a mouse event at that location,
    * or nullptr if there is no such frame.
    * @param aPt the point, relative to the frame origin
-   * @param aShouldIgnoreSuppression a boolean to control if the display
-   * list builder should ignore paint suppression or not
-   * @param aIgnoreRootScrollFrame whether or not the display list builder
-   * should ignore the root scroll frame.
+   * @param aFlags some combination of FrameForPointFlags
    */
   static nsIFrame* GetFrameForPoint(nsIFrame* aFrame, nsPoint aPt,
-                                    bool aShouldIgnoreSuppression = false,
-                                    bool aIgnoreRootScrollFrame = false);
+                                    uint32_t aFlags = 0);
 
   /**
    * Given aFrame, the root frame of a stacking context, find all descendant
@@ -546,15 +555,11 @@ public:
    * or nullptr if there is no such frame.
    * @param aRect the rect, relative to the frame origin
    * @param aOutFrames an array to add all the frames found
-   * @param aShouldIgnoreSuppression a boolean to control if the display
-   * list builder should ignore paint suppression or not
-   * @param aIgnoreRootScrollFrame whether or not the display list builder
-   * should ignore the root scroll frame.
+   * @param aFlags some combination of FrameForPointFlags
    */
   static nsresult GetFramesForArea(nsIFrame* aFrame, const nsRect& aRect,
                                    nsTArray<nsIFrame*> &aOutFrames,
-                                   bool aShouldIgnoreSuppression = false,
-                                   bool aIgnoreRootScrollFrame = false);
+                                   uint32_t aFlags = 0);
 
   /**
    * Transform aRect relative to aAncestor down to the coordinate system of