mozilla
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gecko-dev
зеркало из https://github.com/mozilla/gecko-dev.git
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gecko-dev/accessible/android/SessionAccessibility.cpp

320 строки
9.9 KiB
C++
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/* -*- Mode: c++; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-
* 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 "SessionAccessibility.h"
#include "AndroidUiThread.h"
#include "nsThreadUtils.h"
#include "AccessibilityEvent.h"
#include "HyperTextAccessible.h"
#include "JavaBuiltins.h"
#include "RootAccessibleWrap.h"
#include "nsAccessibilityService.h"
#include "nsViewManager.h"
#ifdef DEBUG
#include <android/log.h>
#define AALOG(args...) \
__android_log_print(ANDROID_LOG_INFO, "GeckoAccessibilityNative", ##args)
#else
#define AALOG(args...) \
do { \
} while (0)
#endif
template<>
const char nsWindow::NativePtr<mozilla::a11y::SessionAccessibility>::sName[] =
"SessionAccessibility";
using namespace mozilla::a11y;
class Settings final
: public mozilla::java::SessionAccessibility::Settings::Natives<Settings>
{
public:
static void ToggleNativeAccessibility(bool aEnable)
{
if (aEnable) {
GetOrCreateAccService();
} else {
MaybeShutdownAccService(nsAccessibilityService::ePlatformAPI);
}
}
};
void
SessionAccessibility::SetAttached(bool aAttached,
already_AddRefed<Runnable> aRunnable)
{
if (RefPtr<nsThread> uiThread = GetAndroidUiThread()) {
uiThread->Dispatch(NS_NewRunnableFunction(
"SessionAccessibility::Attach",
[aAttached,
sa = java::SessionAccessibility::NativeProvider::GlobalRef(
mSessionAccessibility),
runnable = RefPtr<Runnable>(aRunnable)] {
sa->SetAttached(aAttached);
if (runnable) {
runnable->Run();
}
}));
}
}
void
SessionAccessibility::Init()
{
java::SessionAccessibility::NativeProvider::Natives<
SessionAccessibility>::Init();
Settings::Init();
}
mozilla::jni::Object::LocalRef
SessionAccessibility::GetNodeInfo(int32_t aID)
{
java::GeckoBundle::GlobalRef ret = nullptr;
RefPtr<SessionAccessibility> self(this);
nsAppShell::SyncRunEvent([this, self, aID, &ret] {
if (RootAccessibleWrap* rootAcc = GetRoot()) {
AccessibleWrap* acc = rootAcc->FindAccessibleById(aID);
if (acc) {
ret = acc->ToBundle();
} else {
AALOG("oops, nothing for %d", aID);
}
}
});
return mozilla::jni::Object::Ref::From(ret);
}
RootAccessibleWrap*
SessionAccessibility::GetRoot()
{
if (!mWindow) {
return nullptr;
}
return static_cast<RootAccessibleWrap*>(mWindow->GetRootAccessible());
}
void
SessionAccessibility::SetText(int32_t aID, jni::String::Param aText)
{
if (RootAccessibleWrap* rootAcc = GetRoot()) {
AccessibleWrap* acc = rootAcc->FindAccessibleById(aID);
if (!acc) {
return;
}
acc->SetTextContents(aText->ToString());
}
}
SessionAccessibility*
SessionAccessibility::GetInstanceFor(ProxyAccessible* aAccessible)
{
Accessible* outerDoc = aAccessible->OuterDocOfRemoteBrowser();
if (!outerDoc) {
return nullptr;
}
return GetInstanceFor(outerDoc);
}
SessionAccessibility*
SessionAccessibility::GetInstanceFor(Accessible* aAccessible)
{
RootAccessible* rootAcc = aAccessible->RootAccessible();
nsIPresShell* shell = rootAcc->PresShell();
nsViewManager* vm = shell->GetViewManager();
if (!vm) {
return nullptr;
}
nsCOMPtr<nsIWidget> rootWidget;
vm->GetRootWidget(getter_AddRefs(rootWidget));
// `rootWidget` can be one of several types. Here we make sure it is an
// android nsWindow that implemented NS_NATIVE_WIDGET to return itself.
if (rootWidget &&
rootWidget->WindowType() == nsWindowType::eWindowType_toplevel &&
rootWidget->GetNativeData(NS_NATIVE_WIDGET) == rootWidget) {
return static_cast<nsWindow*>(rootWidget.get())->GetSessionAccessibility();
}
return nullptr;
}
void
SessionAccessibility::SendAccessibilityFocusedEvent(AccessibleWrap* aAccessible)
{
mSessionAccessibility->SendEvent(
java::sdk::AccessibilityEvent::TYPE_VIEW_ACCESSIBILITY_FOCUSED,
aAccessible->VirtualViewID(), nullptr, aAccessible->ToBundle());
aAccessible->ScrollTo(nsIAccessibleScrollType::SCROLL_TYPE_ANYWHERE);
}
void
SessionAccessibility::SendHoverEnterEvent(AccessibleWrap* aAccessible)
{
mSessionAccessibility->SendEvent(
java::sdk::AccessibilityEvent::TYPE_VIEW_HOVER_ENTER,
aAccessible->VirtualViewID(), nullptr, aAccessible->ToBundle());
}
void
SessionAccessibility::SendFocusEvent(AccessibleWrap* aAccessible)
{
// Suppress focus events from about:blank pages.
// This is important for tests.
if (aAccessible->IsDoc() && aAccessible->ChildCount() == 0) {
return;
}
mSessionAccessibility->SendEvent(
java::sdk::AccessibilityEvent::TYPE_VIEW_FOCUSED,
aAccessible->VirtualViewID(), nullptr, aAccessible->ToBundle());
}
void
SessionAccessibility::SendScrollingEvent(AccessibleWrap* aAccessible,
int32_t aScrollX,
int32_t aScrollY,
int32_t aMaxScrollX,
int32_t aMaxScrollY)
{
int32_t virtualViewId = aAccessible->VirtualViewID();
if (virtualViewId != AccessibleWrap::kNoID) {
// XXX: Support scrolling in subframes
return;
}
GECKOBUNDLE_START(eventInfo);
GECKOBUNDLE_PUT(eventInfo, "scrollX", java::sdk::Integer::ValueOf(aScrollX));
GECKOBUNDLE_PUT(eventInfo, "scrollY", java::sdk::Integer::ValueOf(aScrollY));
GECKOBUNDLE_PUT(eventInfo, "maxScrollX", java::sdk::Integer::ValueOf(aMaxScrollX));
GECKOBUNDLE_PUT(eventInfo, "maxScrollY", java::sdk::Integer::ValueOf(aMaxScrollY));
GECKOBUNDLE_FINISH(eventInfo);
mSessionAccessibility->SendEvent(
java::sdk::AccessibilityEvent::TYPE_VIEW_SCROLLED, virtualViewId,
eventInfo, aAccessible->ToBundle());
SendWindowContentChangedEvent(aAccessible);
}
void
SessionAccessibility::SendWindowContentChangedEvent(AccessibleWrap* aAccessible)
{
mSessionAccessibility->SendEvent(
java::sdk::AccessibilityEvent::TYPE_WINDOW_CONTENT_CHANGED,
aAccessible->VirtualViewID(), nullptr, aAccessible->ToBundle());
}
void
SessionAccessibility::SendWindowStateChangedEvent(AccessibleWrap* aAccessible)
{
// Suppress window state changed events from about:blank pages.
// This is important for tests.
if (aAccessible->IsDoc() && aAccessible->ChildCount() == 0) {
return;
}
mSessionAccessibility->SendEvent(
java::sdk::AccessibilityEvent::TYPE_WINDOW_STATE_CHANGED,
aAccessible->VirtualViewID(), nullptr, aAccessible->ToBundle());
}
void
SessionAccessibility::SendTextSelectionChangedEvent(AccessibleWrap* aAccessible,
int32_t aCaretOffset)
{
int32_t fromIndex = aCaretOffset;
int32_t startSel = -1;
int32_t endSel = -1;
if (aAccessible->GetSelectionBounds(&startSel, &endSel)) {
fromIndex = startSel == aCaretOffset ? endSel : startSel;
}
GECKOBUNDLE_START(eventInfo);
GECKOBUNDLE_PUT(eventInfo, "fromIndex", java::sdk::Integer::ValueOf(fromIndex));
GECKOBUNDLE_PUT(eventInfo, "toIndex", java::sdk::Integer::ValueOf(aCaretOffset));
GECKOBUNDLE_FINISH(eventInfo);
mSessionAccessibility->SendEvent(
java::sdk::AccessibilityEvent::TYPE_VIEW_TEXT_SELECTION_CHANGED,
aAccessible->VirtualViewID(), eventInfo, aAccessible->ToBundle());
}
void
SessionAccessibility::SendTextChangedEvent(AccessibleWrap* aAccessible,
const nsString& aStr,
int32_t aStart,
uint32_t aLen,
bool aIsInsert,
bool aFromUser)
{
if (!aFromUser) {
// Only dispatch text change events from users, for now.
return;
}
nsAutoString text;
aAccessible->GetTextContents(text);
nsAutoString beforeText(text);
if (aIsInsert) {
beforeText.Cut(aStart, aLen);
} else {
beforeText.Insert(aStr, aStart);
}
GECKOBUNDLE_START(eventInfo);
GECKOBUNDLE_PUT(eventInfo, "text", jni::StringParam(text));
GECKOBUNDLE_PUT(eventInfo, "beforeText", jni::StringParam(beforeText));
GECKOBUNDLE_PUT(eventInfo, "addedCount", java::sdk::Integer::ValueOf(aIsInsert ? aLen : 0));
GECKOBUNDLE_PUT(eventInfo, "removedCount", java::sdk::Integer::ValueOf(aIsInsert ? 0 : aLen));
GECKOBUNDLE_FINISH(eventInfo);
mSessionAccessibility->SendEvent(
java::sdk::AccessibilityEvent::TYPE_VIEW_TEXT_CHANGED,
aAccessible->VirtualViewID(), eventInfo, aAccessible->ToBundle());
}
void
SessionAccessibility::SendTextTraversedEvent(AccessibleWrap* aAccessible,
int32_t aStartOffset,
int32_t aEndOffset)
{
nsAutoString text;
aAccessible->GetTextContents(text);
GECKOBUNDLE_START(eventInfo);
GECKOBUNDLE_PUT(eventInfo, "text", jni::StringParam(text));
GECKOBUNDLE_PUT(eventInfo, "fromIndex", java::sdk::Integer::ValueOf(aStartOffset));
GECKOBUNDLE_PUT(eventInfo, "toIndex", java::sdk::Integer::ValueOf(aEndOffset));
GECKOBUNDLE_FINISH(eventInfo);
mSessionAccessibility->SendEvent(
java::sdk::AccessibilityEvent::
TYPE_VIEW_TEXT_TRAVERSED_AT_MOVEMENT_GRANULARITY,
aAccessible->VirtualViewID(), eventInfo, aAccessible->ToBundle());
}
void
SessionAccessibility::SendClickedEvent(AccessibleWrap* aAccessible)
{
mSessionAccessibility->SendEvent(
java::sdk::AccessibilityEvent::TYPE_VIEW_CLICKED,
aAccessible->VirtualViewID(), nullptr, aAccessible->ToBundle());
}
void
SessionAccessibility::SendSelectedEvent(AccessibleWrap* aAccessible)
{
mSessionAccessibility->SendEvent(
java::sdk::AccessibilityEvent::TYPE_VIEW_SELECTED,
aAccessible->VirtualViewID(), nullptr, aAccessible->ToBundle());
}
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