accessible/xpcom/xpcAccessibleTextLeafRange.cpp

   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 file,
   5  * You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #include "xpcAccessibleTextLeafRange.h"
   8
   9 #include "nsIAccessible.h"
  10 #include "TextLeafRange.h"
  11 #include "xpcAccessibleDocument.h"
  12
  13 using namespace mozilla;
  14 using namespace mozilla::a11y;
  15
  16 // xpcAccessibleTextLeafPoint
  17
  18 NS_IMPL_ADDREF(xpcAccessibleTextLeafPoint)
  19 NS_IMPL_RELEASE(xpcAccessibleTextLeafPoint)
  20
  21 NS_IMPL_QUERY_INTERFACE(xpcAccessibleTextLeafPoint, nsIAccessibleTextLeafPoint)
  22
  23 xpcAccessibleTextLeafPoint::xpcAccessibleTextLeafPoint(
  24     nsIAccessible* aAccessible, int32_t aOffset)
  25     : mAccessible(nullptr), mOffset(0) {
  26   // When constructing a text point it will actualize the offset
  27   // and adjust the accessible to the appropriate leaf. These
  28   // might differ from the given constructor arguments.
  29   if (aAccessible) {
  30     TextLeafPoint point(aAccessible->ToInternalGeneric(), aOffset);
  31     mAccessible = ToXPC(point.mAcc);
  32     mOffset = point.mOffset;
  33   }
  34 }
  35
  36 NS_IMETHODIMP xpcAccessibleTextLeafPoint::GetAccessible(
  37     nsIAccessible** aAccessible) {
  38   NS_ENSURE_ARG_POINTER(aAccessible);
  39   RefPtr<nsIAccessible> acc = mAccessible;
  40   acc.forget(aAccessible);
  41   return NS_OK;
  42 }
  43
  44 NS_IMETHODIMP xpcAccessibleTextLeafPoint::SetAccessible(
  45     nsIAccessible* aAccessible) {
  46   mAccessible = aAccessible;
  47   return NS_OK;
  48 }
  49
  50 NS_IMETHODIMP xpcAccessibleTextLeafPoint::GetOffset(int32_t* aOffset) {
  51   NS_ENSURE_ARG_POINTER(aOffset);
  52   *aOffset = mOffset;
  53   return NS_OK;
  54 }
  55 NS_IMETHODIMP xpcAccessibleTextLeafPoint::SetOffset(int32_t aOffset) {
  56   mOffset = aOffset;
  57   return NS_OK;
  58 }
  59
  60 NS_IMETHODIMP xpcAccessibleTextLeafPoint::FindBoundary(
  61     AccessibleTextBoundary aBoundaryType, uint32_t aDirection, uint32_t aFlags,
  62     nsIAccessibleTextLeafPoint** aPoint) {
  63   TextLeafPoint thisPoint = ToPoint();
  64   if (!thisPoint) {
  65     return NS_ERROR_FAILURE;
  66   }
  67
  68   TextLeafPoint result = thisPoint.FindBoundary(
  69       aBoundaryType, static_cast<nsDirection>(aDirection),
  70       static_cast<TextLeafPoint::BoundaryFlags>(aFlags));
  71   RefPtr<xpcAccessibleTextLeafPoint> point = new xpcAccessibleTextLeafPoint(
  72       result ? ToXPC(result.mAcc) : nullptr, result ? result.mOffset : 0);
  73   point.forget(aPoint);
  74   return NS_OK;
  75 }
  76
  77 TextLeafPoint xpcAccessibleTextLeafPoint::ToPoint() {
  78   if (mAccessible) {
  79     return TextLeafPoint(mAccessible->ToInternalGeneric(), mOffset);
  80   }
  81
  82   return TextLeafPoint();
  83 }