gecko-dev/accessible/atk/nsMaiInterfaceComponent.cpp

117 строки
3.1 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "InterfaceInitFuncs.h"
#include "AccessibleWrap.h"
#include "nsAccUtils.h"
#include "nsCoreUtils.h"
#include "nsMai.h"
#include "mozilla/Likely.h"
using namespace mozilla::a11y;
extern "C" {
static AtkObject*
refAccessibleAtPointCB(AtkComponent* aComponent, gint aAccX, gint aAccY,
AtkCoordType aCoordType)
{
return refAccessibleAtPointHelper(GetAccessibleWrap(ATK_OBJECT(aComponent)),
aAccX, aAccY, aCoordType);
}
static void
getExtentsCB(AtkComponent* aComponent, gint* aX, gint* aY,
gint* aWidth, gint* aHeight, AtkCoordType aCoordType)
{
getExtentsHelper(GetAccessibleWrap(ATK_OBJECT(aComponent)),
aX, aY, aWidth, aHeight, aCoordType);
}
static gboolean
grabFocusCB(AtkComponent* aComponent)
{
AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aComponent));
if (!accWrap)
return FALSE;
nsresult rv = accWrap->TakeFocus();
return (NS_FAILED(rv)) ? FALSE : TRUE;
}
}
AtkObject*
refAccessibleAtPointHelper(AccessibleWrap* aAccWrap, gint aX, gint aY,
AtkCoordType aCoordType)
{
if (!aAccWrap || aAccWrap->IsDefunct() || nsAccUtils::MustPrune(aAccWrap))
return nullptr;
// Accessible::ChildAtPoint(x,y) is in screen pixels.
if (aCoordType == ATK_XY_WINDOW) {
nsIntPoint winCoords =
nsCoreUtils::GetScreenCoordsForWindow(aAccWrap->GetNode());
aX += winCoords.x;
aY += winCoords.y;
}
Accessible* accAtPoint = aAccWrap->ChildAtPoint(aX, aY,
Accessible::eDirectChild);
if (!accAtPoint)
return nullptr;
AtkObject* atkObj = AccessibleWrap::GetAtkObject(accAtPoint);
if (atkObj)
g_object_ref(atkObj);
return atkObj;
}
void
getExtentsHelper(AccessibleWrap* aAccWrap,
gint* aX, gint* aY, gint* aWidth, gint* aHeight,
AtkCoordType aCoordType)
{
*aX = *aY = *aWidth = *aHeight = 0;
if (!aAccWrap || aAccWrap->IsDefunct())
return;
int32_t x = 0, y = 0, width = 0, height = 0;
// Returned in screen coordinates
nsresult rv = aAccWrap->GetBounds(&x, &y, &width, &height);
if (NS_FAILED(rv))
return;
if (aCoordType == ATK_XY_WINDOW) {
nsIntPoint winCoords =
nsCoreUtils::GetScreenCoordsForWindow(aAccWrap->GetNode());
x -= winCoords.x;
y -= winCoords.y;
}
*aX = x;
*aY = y;
*aWidth = width;
*aHeight = height;
}
void
componentInterfaceInitCB(AtkComponentIface* aIface)
{
NS_ASSERTION(aIface, "Invalid Interface");
if(MOZ_UNLIKELY(!aIface))
return;
/*
* Use default implementation in atk for contains, get_position,
* and get_size
*/
aIface->ref_accessible_at_point = refAccessibleAtPointCB;
aIface->get_extents = getExtentsCB;
aIface->grab_focus = grabFocusCB;
}