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/* -*- 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,
#include "UiaText.h"
#include "ia2AccessibleHypertext.h"
#include "mozilla/a11y/States.h"
#include "TextLeafRange.h"
#include "UiaTextRange.h"
using namespace mozilla;
using namespace mozilla::a11y;
// UiaText
Accessible* UiaText::Acc() const {
auto* hyp = static_cast<const ia2AccessibleHypertext*>(this);
return hyp->Acc();
}
// ITextProvider methods
STDMETHODIMP
UiaText::GetSelection(__RPC__deref_out_opt SAFEARRAY** aRetVal) {
if (!aRetVal) {
return E_INVALIDARG;
}
Accessible* acc = Acc();
if (!acc) {
return CO_E_OBJNOTCONNECTED;
}
AutoTArray<TextLeafRange, 1> ranges;
TextLeafRange::GetSelection(acc, ranges);
if (ranges.IsEmpty()) {
// There is no selection. Check if there is a caret.
if (TextLeafPoint caret = TextLeafPoint::GetCaret(acc)) {
ranges.EmplaceBack(caret, caret);
}
}
if (!ranges.IsEmpty()) {
*aRetVal = SafeArrayCreateVector(VT_UNKNOWN, 0, ranges.Length());
LONG indices[1] = {0};
for (TextLeafRange& range : ranges) {
// SafeArrayPutElement calls AddRef on the element, so we use a raw
// pointer here.
UiaTextRange* uiaRange = new UiaTextRange(range);
SafeArrayPutElement(*aRetVal, indices, uiaRange);
++indices[0];
}
}
return S_OK;
}
STDMETHODIMP
UiaText::GetVisibleRanges(__RPC__deref_out_opt SAFEARRAY** aRetVal) {
return E_NOTIMPL;
}
STDMETHODIMP
UiaText::RangeFromChild(__RPC__in_opt IRawElementProviderSimple* aChildElement,
__RPC__deref_out_opt ITextRangeProvider** aRetVal) {
if (!aChildElement || !aRetVal) {
return E_INVALIDARG;
}
*aRetVal = nullptr;
Accessible* acc = Acc();
if (!acc) {
return CO_E_OBJNOTCONNECTED;
}
Accessible* child = MsaaAccessible::GetAccessibleFrom(aChildElement);
if (!child || !acc->IsAncestorOf(child)) {
return E_INVALIDARG;
}
TextLeafRange range = TextLeafRange::FromAccessible(child);
RefPtr uiaRange = new UiaTextRange(range);
uiaRange.forget(aRetVal);
return S_OK;
}
STDMETHODIMP
UiaText::RangeFromPoint(struct UiaPoint aPoint,
__RPC__deref_out_opt ITextRangeProvider** aRetVal) {
if (!aRetVal) {
return E_INVALIDARG;
}
*aRetVal = nullptr;
Accessible* acc = Acc();
if (!acc) {
return CO_E_OBJNOTCONNECTED;
}
// Find the deepest accessible node at the given screen coordinates.
Accessible* child = acc->ChildAtPoint(
aPoint.x, aPoint.y, Accessible::EWhichChildAtPoint::DeepestChild);
if (!child) {
return E_INVALIDARG;
}
// Find the closest point within the entirety of the leaf where the screen
// coordinates lie.
TextLeafRange leafRange = TextLeafRange::FromAccessible(child);
TextLeafPoint closestPoint =
leafRange.TextLeafPointAtScreenPoint(aPoint.x, aPoint.y);
TextLeafRange range{closestPoint, closestPoint};
RefPtr uiaRange = new UiaTextRange(range);
uiaRange.forget(aRetVal);
return S_OK;
}
STDMETHODIMP
UiaText::get_DocumentRange(__RPC__deref_out_opt ITextRangeProvider** aRetVal) {
if (!aRetVal) {
return E_INVALIDARG;
}
Accessible* acc = Acc();
if (!acc) {
return CO_E_OBJNOTCONNECTED;
}
// On the web, the "document range" could either span the entire document or
// just a text input control, depending on the element on which the Text
// pattern was queried. See:
TextLeafRange range = TextLeafRange::FromAccessible(acc);
RefPtr uiaRange = new UiaTextRange(range);
uiaRange.forget(aRetVal);
return S_OK;
}
STDMETHODIMP
UiaText::get_SupportedTextSelection(
__RPC__out enum SupportedTextSelection* aRetVal) {
if (!aRetVal) {
return E_INVALIDARG;
}
Accessible* acc = Acc();
if (!acc) {
return CO_E_OBJNOTCONNECTED;
}
if (acc->State() & states::SELECTABLE_TEXT) {
*aRetVal = SupportedTextSelection_Multiple;
} else {
*aRetVal = SupportedTextSelection_None;
}
return S_OK;
}