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Unified Diff: ui/accessibility/platform/ax_platform_node_win.cc

Issue 2806093002: Forward AXPlatformNodeWin calls to the right child. (Closed)
Patch Set: feedback from dmazzoni Created 3 years, 8 months ago
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Index: ui/accessibility/platform/ax_platform_node_win.cc
diff --git a/ui/accessibility/platform/ax_platform_node_win.cc b/ui/accessibility/platform/ax_platform_node_win.cc
index 9a3619ed7ff31aaba10d3a29579dffd7efb776fc..37a54094e4f2646f2def0dc925d9055ce9d0505b 100644
--- a/ui/accessibility/platform/ax_platform_node_win.cc
+++ b/ui/accessibility/platform/ax_platform_node_win.cc
@@ -33,48 +33,100 @@
if (!delegate_) \
return E_FAIL;
#define COM_OBJECT_VALIDATE_1_ARG(arg) \
- if (!delegate_) return E_FAIL; \
- if (!arg) return E_INVALIDARG
+ if (!delegate_) \
+ return E_FAIL; \
+ if (!arg) \
+ return E_INVALIDARG;
#define COM_OBJECT_VALIDATE_2_ARGS(arg1, arg2) \
- if (!delegate_) return E_FAIL; \
- if (!arg1) return E_INVALIDARG; \
- if (!arg2) return E_INVALIDARG
+ if (!delegate_) \
+ return E_FAIL; \
+ if (!arg1) \
+ return E_INVALIDARG; \
+ if (!arg2) \
+ return E_INVALIDARG;
#define COM_OBJECT_VALIDATE_3_ARGS(arg1, arg2, arg3) \
- if (!delegate_) return E_FAIL; \
- if (!arg1) return E_INVALIDARG; \
- if (!arg2) return E_INVALIDARG; \
- if (!arg3) return E_INVALIDARG
+ if (!delegate_) \
+ return E_FAIL; \
+ if (!arg1) \
+ return E_INVALIDARG; \
+ if (!arg2) \
+ return E_INVALIDARG; \
+ if (!arg3) \
+ return E_INVALIDARG;
#define COM_OBJECT_VALIDATE_4_ARGS(arg1, arg2, arg3, arg4) \
- if (!delegate_) return E_FAIL; \
- if (!arg1) return E_INVALIDARG; \
- if (!arg2) return E_INVALIDARG; \
- if (!arg3) return E_INVALIDARG; \
- if (!arg4) return E_INVALIDARG
-#define COM_OBJECT_VALIDATE_VAR_ID(var_id) \
- if (!delegate_) return E_FAIL; \
- if (!IsValidId(var_id)) return E_INVALIDARG
-#define COM_OBJECT_VALIDATE_VAR_ID_1_ARG(var_id, arg) \
- if (!delegate_) return E_FAIL; \
- if (!IsValidId(var_id)) return E_INVALIDARG; \
- if (!arg) return E_INVALIDARG
-#define COM_OBJECT_VALIDATE_VAR_ID_2_ARGS(var_id, arg1, arg2) \
- if (!delegate_) return E_FAIL; \
- if (!IsValidId(var_id)) return E_INVALIDARG; \
- if (!arg1) return E_INVALIDARG; \
- if (!arg2) return E_INVALIDARG
-#define COM_OBJECT_VALIDATE_VAR_ID_3_ARGS(var_id, arg1, arg2, arg3) \
- if (!delegate_) return E_FAIL; \
- if (!IsValidId(var_id)) return E_INVALIDARG; \
- if (!arg1) return E_INVALIDARG; \
- if (!arg2) return E_INVALIDARG; \
- if (!arg3) return E_INVALIDARG
-#define COM_OBJECT_VALIDATE_VAR_ID_4_ARGS(var_id, arg1, arg2, arg3, arg4) \
- if (!delegate_) return E_FAIL; \
- if (!IsValidId(var_id)) return E_INVALIDARG; \
- if (!arg1) return E_INVALIDARG; \
- if (!arg2) return E_INVALIDARG; \
- if (!arg3) return E_INVALIDARG; \
- if (!arg4) return E_INVALIDARG
+ if (!delegate_) \
+ return E_FAIL; \
+ if (!arg1) \
+ return E_INVALIDARG; \
+ if (!arg2) \
+ return E_INVALIDARG; \
+ if (!arg3) \
+ return E_INVALIDARG; \
+ if (!arg4) \
+ return E_INVALIDARG;
+#define COM_OBJECT_VALIDATE_VAR_ID_AND_GET_TARGET(var_id, target) \
+ if (!delegate_) \
+ return E_FAIL; \
+ target = GetTargetFromChildID(var_id); \
+ if (!target) \
+ return E_INVALIDARG; \
+ if (!target->delegate_) \
+ return E_INVALIDARG;
+#define COM_OBJECT_VALIDATE_VAR_ID_1_ARG_AND_GET_TARGET(var_id, arg, target) \
+ if (!delegate_) \
+ return E_FAIL; \
+ if (!arg) \
+ return E_INVALIDARG; \
+ target = GetTargetFromChildID(var_id); \
+ if (!target) \
+ return E_INVALIDARG; \
+ if (!target->delegate_) \
+ return E_INVALIDARG;
+#define COM_OBJECT_VALIDATE_VAR_ID_2_ARGS_AND_GET_TARGET(var_id, arg1, arg2, \
+ target) \
+ if (!delegate_) \
+ return E_FAIL; \
+ if (!arg1) \
+ return E_INVALIDARG; \
+ if (!arg2) \
+ return E_INVALIDARG; \
+ target = GetTargetFromChildID(var_id); \
+ if (!target) \
+ return E_INVALIDARG; \
+ if (!target->delegate_) \
+ return E_INVALIDARG;
+#define COM_OBJECT_VALIDATE_VAR_ID_3_ARGS_AND_GET_TARGET(var_id, arg1, arg2, \
+ arg3, target) \
+ if (!delegate_) \
+ return E_FAIL; \
+ if (!arg1) \
+ return E_INVALIDARG; \
+ if (!arg2) \
+ return E_INVALIDARG; \
+ if (!arg3) \
+ return E_INVALIDARG; \
+ target = GetTargetFromChildID(var_id); \
+ if (!target) \
+ return E_INVALIDARG; \
+ if (!target->delegate_) \
+ return E_INVALIDARG;
+#define COM_OBJECT_VALIDATE_VAR_ID_4_ARGS_AND_GET_TARGET(var_id, arg1, arg2, \
+ arg3, arg4, target) \
+ if (!delegate_) \
+ return E_FAIL; \
+ if (!arg1) \
+ return E_INVALIDARG; \
+ if (!arg2) \
+ return E_INVALIDARG; \
+ if (!arg3) \
+ return E_INVALIDARG; \
+ if (!arg4) \
+ return E_INVALIDARG; \
+ target = GetTargetFromChildID(var_id); \
+ if (!target) \
+ return E_INVALIDARG; \
+ if (!target->delegate_) \
+ return E_INVALIDARG;
namespace ui {
@@ -128,6 +180,8 @@ AXPlatformNode* AXPlatformNode::Create(AXPlatformNodeDelegate* delegate) {
// static
AXPlatformNode* AXPlatformNode::FromNativeViewAccessible(
gfx::NativeViewAccessible accessible) {
+ if (!accessible)
+ return nullptr;
base::win::ScopedComPtr<AXPlatformNodeWin> ax_platform_node;
accessible->QueryInterface(ax_platform_node.Receive());
return ax_platform_node.get();
@@ -252,18 +306,23 @@ STDMETHODIMP AXPlatformNodeWin::accHitTest(
}
HRESULT AXPlatformNodeWin::accDoDefaultAction(VARIANT var_id) {
- COM_OBJECT_VALIDATE_VAR_ID(var_id);
+ AXPlatformNodeWin* target;
+ COM_OBJECT_VALIDATE_VAR_ID_AND_GET_TARGET(var_id, target);
AXActionData data;
data.action = ui::AX_ACTION_DO_DEFAULT;
- if (delegate_->AccessibilityPerformAction(data))
+
+ if (target->delegate_->AccessibilityPerformAction(data))
return S_OK;
return E_FAIL;
}
STDMETHODIMP AXPlatformNodeWin::accLocation(
LONG* x_left, LONG* y_top, LONG* width, LONG* height, VARIANT var_id) {
- COM_OBJECT_VALIDATE_VAR_ID_4_ARGS(var_id, x_left, y_top, width, height);
- gfx::Rect bounds = delegate_->GetScreenBoundsRect();
+ AXPlatformNodeWin* target;
+ COM_OBJECT_VALIDATE_VAR_ID_4_ARGS_AND_GET_TARGET(var_id, x_left, y_top, width,
+ height, target);
+
+ gfx::Rect bounds = target->delegate_->GetScreenBoundsRect();
*x_left = bounds.x();
*y_top = bounds.y();
*width = bounds.width();
@@ -277,7 +336,8 @@ STDMETHODIMP AXPlatformNodeWin::accLocation(
STDMETHODIMP AXPlatformNodeWin::accNavigate(
LONG nav_dir, VARIANT start, VARIANT* end) {
- COM_OBJECT_VALIDATE_VAR_ID_1_ARG(start, end);
+ AXPlatformNodeWin* target;
+ COM_OBJECT_VALIDATE_VAR_ID_1_ARG_AND_GET_TARGET(start, end, target);
IAccessible* result = nullptr;
if ((nav_dir == NAVDIR_LASTCHILD || nav_dir == NAVDIR_FIRSTCHILD) &&
@@ -337,41 +397,13 @@ STDMETHODIMP AXPlatformNodeWin::accNavigate(
STDMETHODIMP AXPlatformNodeWin::get_accChild(VARIANT var_child,
IDispatch** disp_child) {
- COM_OBJECT_VALIDATE_1_ARG(disp_child);
- LONG child_id = V_I4(&var_child);
- if (child_id == CHILDID_SELF) {
- *disp_child = this;
- (*disp_child)->AddRef();
- return S_OK;
- }
-
- if (child_id >= 1 && child_id <= delegate_->GetChildCount()) {
- // Positive child ids are a 1-based child index, used by clients
- // that want to enumerate all immediate children.
- *disp_child = delegate_->ChildAtIndex(child_id - 1);
- if (!(*disp_child))
- return E_INVALIDARG;
- (*disp_child)->AddRef();
- return S_OK;
- }
-
- if (child_id >= 0)
- return E_INVALIDARG;
-
- // Negative child ids can be used to map to any descendant.
- AXPlatformNodeWin* child = static_cast<AXPlatformNodeWin*>(
- GetFromUniqueId(-child_id));
- if (child && !IsDescendant(child))
- child = nullptr;
-
- if (child) {
- *disp_child = child;
- (*disp_child)->AddRef();
- return S_OK;
- }
-
*disp_child = nullptr;
- return E_INVALIDARG;
+ AXPlatformNodeWin* target;
+ COM_OBJECT_VALIDATE_VAR_ID_AND_GET_TARGET(var_child, target);
+
+ *disp_child = target;
+ (*disp_child)->AddRef();
+ return S_OK;
}
STDMETHODIMP AXPlatformNodeWin::get_accChildCount(LONG* child_count) {
@@ -382,9 +414,11 @@ STDMETHODIMP AXPlatformNodeWin::get_accChildCount(LONG* child_count) {
STDMETHODIMP AXPlatformNodeWin::get_accDefaultAction(
VARIANT var_id, BSTR* def_action) {
- COM_OBJECT_VALIDATE_VAR_ID_1_ARG(var_id, def_action);
+ AXPlatformNodeWin* target;
+ COM_OBJECT_VALIDATE_VAR_ID_1_ARG_AND_GET_TARGET(var_id, def_action, target);
+
int action;
- if (!GetIntAttribute(AX_ATTR_ACTION, &action)) {
+ if (!target->GetIntAttribute(AX_ATTR_ACTION, &action)) {
*def_action = nullptr;
return S_FALSE;
}
@@ -403,8 +437,10 @@ STDMETHODIMP AXPlatformNodeWin::get_accDefaultAction(
STDMETHODIMP AXPlatformNodeWin::get_accDescription(
VARIANT var_id, BSTR* desc) {
- COM_OBJECT_VALIDATE_VAR_ID_1_ARG(var_id, desc);
- return GetStringAttributeAsBstr(ui::AX_ATTR_DESCRIPTION, desc);
+ AXPlatformNodeWin* target;
+ COM_OBJECT_VALIDATE_VAR_ID_1_ARG_AND_GET_TARGET(var_id, desc, target);
+
+ return target->GetStringAttributeAsBstr(ui::AX_ATTR_DESCRIPTION, desc);
}
STDMETHODIMP AXPlatformNodeWin::get_accFocus(VARIANT* focus_child) {
@@ -427,14 +463,18 @@ STDMETHODIMP AXPlatformNodeWin::get_accFocus(VARIANT* focus_child) {
STDMETHODIMP AXPlatformNodeWin::get_accKeyboardShortcut(
VARIANT var_id, BSTR* acc_key) {
- COM_OBJECT_VALIDATE_VAR_ID_1_ARG(var_id, acc_key);
- return GetStringAttributeAsBstr(ui::AX_ATTR_SHORTCUT, acc_key);
+ AXPlatformNodeWin* target;
+ COM_OBJECT_VALIDATE_VAR_ID_1_ARG_AND_GET_TARGET(var_id, acc_key, target);
+
+ return target->GetStringAttributeAsBstr(ui::AX_ATTR_SHORTCUT, acc_key);
}
STDMETHODIMP AXPlatformNodeWin::get_accName(
VARIANT var_id, BSTR* name) {
- COM_OBJECT_VALIDATE_VAR_ID_1_ARG(var_id, name);
- return GetStringAttributeAsBstr(ui::AX_ATTR_NAME, name);
+ AXPlatformNodeWin* target;
+ COM_OBJECT_VALIDATE_VAR_ID_1_ARG_AND_GET_TARGET(var_id, name, target);
+
+ return target->GetStringAttributeAsBstr(ui::AX_ATTR_NAME, name);
}
STDMETHODIMP AXPlatformNodeWin::get_accParent(
@@ -451,38 +491,42 @@ STDMETHODIMP AXPlatformNodeWin::get_accParent(
STDMETHODIMP AXPlatformNodeWin::get_accRole(
VARIANT var_id, VARIANT* role) {
- COM_OBJECT_VALIDATE_VAR_ID_1_ARG(var_id, role);
+ AXPlatformNodeWin* target;
+ COM_OBJECT_VALIDATE_VAR_ID_1_ARG_AND_GET_TARGET(var_id, role, target);
role->vt = VT_I4;
- role->lVal = MSAARole();
+ role->lVal = target->MSAARole();
return S_OK;
}
STDMETHODIMP AXPlatformNodeWin::get_accState(
VARIANT var_id, VARIANT* state) {
- COM_OBJECT_VALIDATE_VAR_ID_1_ARG(var_id, state);
+ AXPlatformNodeWin* target;
+ COM_OBJECT_VALIDATE_VAR_ID_1_ARG_AND_GET_TARGET(var_id, state, target);
state->vt = VT_I4;
- state->lVal = MSAAState();
+ state->lVal = target->MSAAState();
return S_OK;
}
STDMETHODIMP AXPlatformNodeWin::get_accHelp(
VARIANT var_id, BSTR* help) {
- COM_OBJECT_VALIDATE_VAR_ID_1_ARG(var_id, help);
return S_FALSE;
}
STDMETHODIMP AXPlatformNodeWin::get_accValue(VARIANT var_id, BSTR* value) {
- COM_OBJECT_VALIDATE_VAR_ID_1_ARG(var_id, value);
- return GetStringAttributeAsBstr(ui::AX_ATTR_VALUE, value);
+ AXPlatformNodeWin* target;
+ COM_OBJECT_VALIDATE_VAR_ID_1_ARG_AND_GET_TARGET(var_id, value, target);
+ return target->GetStringAttributeAsBstr(ui::AX_ATTR_VALUE, value);
}
STDMETHODIMP AXPlatformNodeWin::put_accValue(VARIANT var_id,
BSTR new_value) {
+ AXPlatformNodeWin* target;
+ COM_OBJECT_VALIDATE_VAR_ID_AND_GET_TARGET(var_id, target);
+
AXActionData data;
data.action = ui::AX_ACTION_SET_VALUE;
data.value = new_value;
- COM_OBJECT_VALIDATE_VAR_ID(var_id);
- if (delegate_->AccessibilityPerformAction(data))
+ if (target->delegate_->AccessibilityPerformAction(data))
return S_OK;
return E_FAIL;
}
@@ -498,13 +542,14 @@ STDMETHODIMP AXPlatformNodeWin::get_accSelection(VARIANT* selected) {
STDMETHODIMP AXPlatformNodeWin::accSelect(
LONG flagsSelect, VARIANT var_id) {
- COM_OBJECT_VALIDATE_VAR_ID(var_id);
return E_NOTIMPL;
}
STDMETHODIMP AXPlatformNodeWin::get_accHelpTopic(
BSTR* help_file, VARIANT var_id, LONG* topic_id) {
- COM_OBJECT_VALIDATE_VAR_ID_2_ARGS(var_id, help_file, topic_id);
+ AXPlatformNodeWin* target;
+ COM_OBJECT_VALIDATE_VAR_ID_2_ARGS_AND_GET_TARGET(var_id, help_file, topic_id,
+ target);
if (help_file) {
*help_file = nullptr;
}
@@ -516,7 +561,6 @@ STDMETHODIMP AXPlatformNodeWin::get_accHelpTopic(
STDMETHODIMP AXPlatformNodeWin::put_accName(
VARIANT var_id, BSTR put_name) {
- COM_OBJECT_VALIDATE_VAR_ID(var_id);
// Deprecated.
return E_NOTIMPL;
}
@@ -974,13 +1018,6 @@ STDMETHODIMP AXPlatformNodeWin::QueryService(
//
// Private member functions.
//
-
-bool AXPlatformNodeWin::IsValidId(const VARIANT& child) const {
- // Since we have a separate IAccessible COM object for each node, we only
- // support the CHILDID_SELF id.
- return (VT_I4 == child.vt) && (CHILDID_SELF == child.lVal);
-}
-
int AXPlatformNodeWin::MSAARole() {
switch (GetData().role) {
case ui::AX_ROLE_ALERT:
@@ -1206,4 +1243,35 @@ LONG AXPlatformNodeWin::FindBoundary(
AX_TEXT_AFFINITY_DOWNSTREAM));
}
+AXPlatformNodeWin* AXPlatformNodeWin::GetTargetFromChildID(
+ const VARIANT& var_id) {
+ LONG child_id = V_I4(&var_id);
+ if (child_id == CHILDID_SELF) {
+ return this;
+ }
+
+ if (child_id >= 1 && child_id <= delegate_->GetChildCount()) {
+ // Positive child ids are a 1-based child index, used by clients
+ // that want to enumerate all immediate children.
+ AXPlatformNodeBase* base =
+ FromNativeViewAccessible(delegate_->ChildAtIndex(child_id - 1));
+ return static_cast<AXPlatformNodeWin*>(base);
+ }
+
+ if (child_id >= 0)
+ return nullptr;
+
+ // Negative child ids can be used to map to any descendant.
+ AXPlatformNode* node = GetFromUniqueId(-child_id);
+ if (!node)
+ return nullptr;
+
+ AXPlatformNodeBase* base =
+ FromNativeViewAccessible(node->GetNativeViewAccessible());
+ if (base && !IsDescendant(base))
+ base = nullptr;
+
+ return static_cast<AXPlatformNodeWin*>(base);
+}
+
} // namespace ui
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