accessible/ipc/DocAccessibleChild.h

   1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #ifndef mozilla_a11y_DocAccessibleChild_h
   8 #define mozilla_a11y_DocAccessibleChild_h
   9
  10 #include "mozilla/a11y/DocAccessible.h"
  11 #include "mozilla/a11y/PDocAccessibleChild.h"
  12 #include "mozilla/Unused.h"
  13 #include "nsISupportsImpl.h"
  14
  15 namespace mozilla {
  16 namespace a11y {
  17
  18 class LocalAccessible;
  19 class AccShowEvent;
  20
  21 /**
  22  * These objects handle content side communication for an accessible document,
  23  * and their lifetime is the same as the document they represent.
  24  */
  25 class DocAccessibleChild : public PDocAccessibleChild {
  26  public:
  27   DocAccessibleChild(DocAccessible* aDoc, IProtocol* aManager) : mDoc(aDoc) {
  28     MOZ_COUNT_CTOR(DocAccessibleChild);
  29     SetManager(aManager);
  30   }
  31
  32   ~DocAccessibleChild() {
  33     // Shutdown() should have been called, but maybe it isn't if the process is
  34     // killed?
  35     MOZ_ASSERT(!mDoc);
  36     if (mDoc) {
  37       mDoc->SetIPCDoc(nullptr);
  38     }
  39
  40     MOZ_COUNT_DTOR(DocAccessibleChild);
  41   }
  42
  43   virtual void Shutdown() {
  44     DetachDocument();
  45     SendShutdown();
  46   }
  47
  48   /**
  49    * Serializes a shown tree and sends it to the chrome process.
  50    */
  51   void InsertIntoIpcTree(LocalAccessible* aChild, bool aSuppressShowEvent);
  52   void ShowEvent(AccShowEvent* aShowEvent);
  53
  54   virtual void ActorDestroy(ActorDestroyReason) override {
  55     if (!mDoc) {
  56       return;
  57     }
  58
  59     mDoc->SetIPCDoc(nullptr);
  60     mDoc = nullptr;
  61   }
  62
  63   virtual mozilla::ipc::IPCResult RecvTakeFocus(const uint64_t& aID) override;
  64
  65   MOZ_CAN_RUN_SCRIPT_BOUNDARY
  66   virtual mozilla::ipc::IPCResult RecvScrollTo(
  67       const uint64_t& aID, const uint32_t& aScrollType) override;
  68
  69   virtual mozilla::ipc::IPCResult RecvTakeSelection(
  70       const uint64_t& aID) override;
  71   virtual mozilla::ipc::IPCResult RecvSetSelected(const uint64_t& aID,
  72                                                   const bool& aSelect) override;
  73
  74   virtual mozilla::ipc::IPCResult RecvVerifyCache(
  75       const uint64_t& aID, const uint64_t& aCacheDomain,
  76       AccAttributes* aFields) override;
  77
  78   virtual mozilla::ipc::IPCResult RecvDoActionAsync(
  79       const uint64_t& aID, const uint8_t& aIndex) override;
  80
  81   virtual mozilla::ipc::IPCResult RecvSetCaretOffset(
  82       const uint64_t& aID, const int32_t& aOffset) override;
  83
  84   MOZ_CAN_RUN_SCRIPT_BOUNDARY
  85   virtual mozilla::ipc::IPCResult RecvSetTextSelection(
  86       const uint64_t& aStartID, const int32_t& aStartOffset,
  87       const uint64_t& aEndID, const int32_t& aEndOffset,
  88       const int32_t& aSelectionNum) override;
  89
  90   MOZ_CAN_RUN_SCRIPT_BOUNDARY
  91   virtual mozilla::ipc::IPCResult RecvScrollTextLeafRangeIntoView(
  92       const uint64_t& aStartID, const int32_t& aStartOffset,
  93       const uint64_t& aEndID, const int32_t& aEndOffset,
  94       const uint32_t& aScrollType) override;
  95
  96   virtual mozilla::ipc::IPCResult RecvRemoveTextSelection(
  97       const uint64_t& aID, const int32_t& aSelectionNum) override;
  98
  99   virtual mozilla::ipc::IPCResult RecvSetCurValue(
 100       const uint64_t& aID, const double& aValue) override;
 101
 102   virtual mozilla::ipc::IPCResult RecvReplaceText(
 103       const uint64_t& aID, const nsAString& aText) override;
 104
 105   virtual mozilla::ipc::IPCResult RecvInsertText(
 106       const uint64_t& aID, const nsAString& aText,
 107       const int32_t& aPosition) override;
 108
 109   virtual mozilla::ipc::IPCResult RecvCopyText(const uint64_t& aID,
 110                                                const int32_t& aStartPos,
 111                                                const int32_t& aEndPos) override;
 112
 113   virtual mozilla::ipc::IPCResult RecvCutText(const uint64_t& aID,
 114                                               const int32_t& aStartPos,
 115                                               const int32_t& aEndPos) override;
 116
 117   virtual mozilla::ipc::IPCResult RecvDeleteText(
 118       const uint64_t& aID, const int32_t& aStartPos,
 119       const int32_t& aEndPos) override;
 120
 121   MOZ_CAN_RUN_SCRIPT_BOUNDARY
 122   virtual mozilla::ipc::IPCResult RecvPasteText(
 123       const uint64_t& aID, const int32_t& aPosition) override;
 124
 125   virtual mozilla::ipc::IPCResult RecvRestoreFocus() override;
 126
 127   virtual mozilla::ipc::IPCResult RecvScrollToPoint(const uint64_t& aID,
 128                                                     const uint32_t& aScrollType,
 129                                                     const int32_t& aX,
 130                                                     const int32_t& aY) override;
 131
 132   bool SendCaretMoveEvent(const uint64_t& aID, const int32_t& aOffset,
 133                           const bool& aIsSelectionCollapsed,
 134                           const bool& aIsAtEndOfLine,
 135                           const int32_t& aGranularity);
 136   bool SendFocusEvent(const uint64_t& aID);
 137
 138 #if !defined(XP_WIN)
 139   virtual mozilla::ipc::IPCResult RecvAnnounce(
 140       const uint64_t& aID, const nsAString& aAnnouncement,
 141       const uint16_t& aPriority) override;
 142 #endif  // !defined(XP_WIN)
 143
 144   virtual mozilla::ipc::IPCResult RecvScrollSubstringToPoint(
 145       const uint64_t& aID, const int32_t& aStartOffset,
 146       const int32_t& aEndOffset, const uint32_t& aCoordinateType,
 147       const int32_t& aX, const int32_t& aY) override;
 148
 149  private:
 150   LayoutDeviceIntRect GetCaretRectFor(const uint64_t& aID);
 151
 152  protected:
 153   static void FlattenTree(LocalAccessible* aRoot,
 154                           nsTArray<LocalAccessible*>& aTree);
 155
 156   static AccessibleData SerializeAcc(LocalAccessible* aAcc);
 157
 158   void DetachDocument() {
 159     if (mDoc) {
 160       mDoc->SetIPCDoc(nullptr);
 161       mDoc = nullptr;
 162     }
 163   }
 164
 165   LocalAccessible* IdToAccessible(const uint64_t& aID) const;
 166   HyperTextAccessible* IdToHyperTextAccessible(const uint64_t& aID) const;
 167
 168   DocAccessible* mDoc;
 169
 170   friend void DocAccessible::DoInitialUpdate();
 171 };
 172
 173 }  // namespace a11y
 174 }  // namespace mozilla
 175
 176 #endif  // mozilla_a11y_DocAccessibleChild_h