layout/xul/nsDocElementBoxFrame.cpp

   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/. */
   5 #include "nsHTMLParts.h"
   6 #include "nsContainerFrame.h"
   7 #include "nsCSSRendering.h"
   8 #include "nsIDocument.h"
   9 #include "nsPageFrame.h"
  10 #include "nsIDOMEvent.h"
  11 #include "nsStyleConsts.h"
  12 #include "nsGkAtoms.h"
  13 #include "nsIPresShell.h"
  14 #include "nsBoxFrame.h"
  15 #include "nsStackLayout.h"
  16 #include "nsIAnonymousContentCreator.h"
  17 #include "mozilla/dom/NodeInfo.h"
  18 #include "nsIServiceManager.h"
  19 #include "nsNodeInfoManager.h"
  20 #include "nsContentCreatorFunctions.h"
  21 #include "nsContentUtils.h"
  22 #include "nsContentList.h"
  23 #include "mozilla/dom/Element.h"
  24
  25 //#define DEBUG_REFLOW
  26
  27 using namespace mozilla::dom;
  28
  29 class nsDocElementBoxFrame : public nsBoxFrame,
  30                              public nsIAnonymousContentCreator
  31 {
  32 public:
  33   virtual void DestroyFrom(nsIFrame* aDestructRoot) MOZ_OVERRIDE;
  34
  35   friend nsIFrame* NS_NewBoxFrame(nsIPresShell* aPresShell,
  36                                   nsStyleContext* aContext);
  37
  38   explicit nsDocElementBoxFrame(nsStyleContext* aContext)
  39     :nsBoxFrame(aContext, true) {}
  40
  41   NS_DECL_QUERYFRAME
  42   NS_DECL_FRAMEARENA_HELPERS
  43
  44   // nsIAnonymousContentCreator
  45   virtual nsresult CreateAnonymousContent(nsTArray<ContentInfo>& aElements) MOZ_OVERRIDE;
  46   virtual void AppendAnonymousContentTo(nsTArray<nsIContent*>& aElements,
  47                                         uint32_t aFilter) MOZ_OVERRIDE;
  48
  49   virtual bool IsFrameOfType(uint32_t aFlags) const MOZ_OVERRIDE
  50   {
  51     // Override nsBoxFrame.
  52     if (aFlags & (nsIFrame::eReplacedContainsBlock | nsIFrame::eReplaced))
  53       return false;
  54     return nsBoxFrame::IsFrameOfType(aFlags);
  55   }
  56
  57 #ifdef DEBUG_FRAME_DUMP
  58   virtual nsresult GetFrameName(nsAString& aResult) const MOZ_OVERRIDE;
  59 #endif
  60 private:
  61   nsCOMPtr<Element> mPopupgroupContent;
  62   nsCOMPtr<Element> mTooltipContent;
  63 };
  64
  65 //----------------------------------------------------------------------
  66
  67 nsContainerFrame*
  68 NS_NewDocElementBoxFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
  69 {
  70   return new (aPresShell) nsDocElementBoxFrame(aContext);
  71 }
  72
  73 NS_IMPL_FRAMEARENA_HELPERS(nsDocElementBoxFrame)
  74
  75 void
  76 nsDocElementBoxFrame::DestroyFrom(nsIFrame* aDestructRoot)
  77 {
  78   nsContentUtils::DestroyAnonymousContent(&mPopupgroupContent);
  79   nsContentUtils::DestroyAnonymousContent(&mTooltipContent);
  80   nsBoxFrame::DestroyFrom(aDestructRoot);
  81 }
  82
  83 nsresult
  84 nsDocElementBoxFrame::CreateAnonymousContent(nsTArray<ContentInfo>& aElements)
  85 {
  86   nsIDocument* doc = mContent->GetComposedDoc();
  87   if (!doc) {
  88     // The page is currently being torn down.  Why bother.
  89     return NS_ERROR_FAILURE;
  90   }
  91   nsNodeInfoManager *nodeInfoManager = doc->NodeInfoManager();
  92
  93   // create the top-secret popupgroup node. shhhhh!
  94   nsRefPtr<NodeInfo> nodeInfo;
  95   nodeInfo = nodeInfoManager->GetNodeInfo(nsGkAtoms::popupgroup,
  96                                           nullptr, kNameSpaceID_XUL,
  97                                           nsIDOMNode::ELEMENT_NODE);
  98   NS_ENSURE_TRUE(nodeInfo, NS_ERROR_OUT_OF_MEMORY);
  99
 100   nsresult rv = NS_NewXULElement(getter_AddRefs(mPopupgroupContent),
 101                                  nodeInfo.forget());
 102   NS_ENSURE_SUCCESS(rv, rv);
 103
 104   if (!aElements.AppendElement(mPopupgroupContent))
 105     return NS_ERROR_OUT_OF_MEMORY;
 106
 107   // create the top-secret default tooltip node. shhhhh!
 108   nodeInfo = nodeInfoManager->GetNodeInfo(nsGkAtoms::tooltip, nullptr,
 109                                           kNameSpaceID_XUL,
 110                                           nsIDOMNode::ELEMENT_NODE);
 111   NS_ENSURE_TRUE(nodeInfo, NS_ERROR_OUT_OF_MEMORY);
 112
 113   rv = NS_NewXULElement(getter_AddRefs(mTooltipContent), nodeInfo.forget());
 114   NS_ENSURE_SUCCESS(rv, rv);
 115
 116   mTooltipContent->SetAttr(kNameSpaceID_None, nsGkAtoms::_default,
 117                            NS_LITERAL_STRING("true"), false);
 118
 119   if (!aElements.AppendElement(mTooltipContent))
 120     return NS_ERROR_OUT_OF_MEMORY;
 121
 122   return NS_OK;
 123 }
 124
 125 void
 126 nsDocElementBoxFrame::AppendAnonymousContentTo(nsTArray<nsIContent*>& aElements,
 127                                                uint32_t aFilter)
 128 {
 129   if (mPopupgroupContent) {
 130     aElements.AppendElement(mPopupgroupContent);
 131   }
 132
 133   if (mTooltipContent) {
 134     aElements.AppendElement(mTooltipContent);
 135   }
 136 }
 137
 138 NS_QUERYFRAME_HEAD(nsDocElementBoxFrame)
 139   NS_QUERYFRAME_ENTRY(nsIAnonymousContentCreator)
 140 NS_QUERYFRAME_TAIL_INHERITING(nsBoxFrame)
 141
 142 #ifdef DEBUG_FRAME_DUMP
 143 nsresult
 144 nsDocElementBoxFrame::GetFrameName(nsAString& aResult) const
 145 {
 146   return MakeFrameName(NS_LITERAL_STRING("DocElementBox"), aResult);
 147 }
 148 #endif