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Diffstat (limited to '')
| -rw-r--r-- | accessible/xpcom/xpcAccessibleMacInterface.mm | 581 |
1 files changed, 581 insertions, 0 deletions
diff --git a/accessible/xpcom/xpcAccessibleMacInterface.mm b/accessible/xpcom/xpcAccessibleMacInterface.mm new file mode 100644 index 0000000000..e05937360b --- /dev/null +++ b/accessible/xpcom/xpcAccessibleMacInterface.mm @@ -0,0 +1,581 @@ +/* clang-format off */ +/* -*- Mode: Objective-C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* clang-format on */ +/* 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 "xpcAccessibleMacInterface.h" + +#include "nsCocoaUtils.h" +#include "nsContentUtils.h" +#include "nsIObserverService.h" +#include "nsISimpleEnumerator.h" +#include "nsIXPConnect.h" +#include "mozilla/dom/ToJSValue.h" +#include "mozilla/Services.h" +#include "nsString.h" +#include "js/PropertyAndElement.h" // JS_Enumerate, JS_GetElement, JS_GetProperty, JS_GetPropertyById, JS_HasOwnProperty, JS_SetUCProperty + +#import "mozAccessible.h" + +using namespace mozilla::a11y; + +// xpcAccessibleMacNSObjectWrapper + +NS_IMPL_ISUPPORTS(xpcAccessibleMacNSObjectWrapper, + nsIAccessibleMacNSObjectWrapper) + +xpcAccessibleMacNSObjectWrapper::xpcAccessibleMacNSObjectWrapper(id aNativeObj) + : mNativeObject(aNativeObj) { + [mNativeObject retain]; +} + +xpcAccessibleMacNSObjectWrapper::~xpcAccessibleMacNSObjectWrapper() { + [mNativeObject release]; +} + +id xpcAccessibleMacNSObjectWrapper::GetNativeObject() { return mNativeObject; } + +// xpcAccessibleMacInterface + +NS_IMPL_ISUPPORTS_INHERITED(xpcAccessibleMacInterface, + xpcAccessibleMacNSObjectWrapper, + nsIAccessibleMacInterface) + +xpcAccessibleMacInterface::xpcAccessibleMacInterface(Accessible* aObj) + : xpcAccessibleMacNSObjectWrapper(GetNativeFromGeckoAccessible(aObj)) {} + +NS_IMETHODIMP +xpcAccessibleMacInterface::GetAttributeNames( + nsTArray<nsString>& aAttributeNames) { + NS_OBJC_BEGIN_TRY_BLOCK_RETURN + + if (!mNativeObject || [mNativeObject isExpired]) { + return NS_ERROR_NOT_AVAILABLE; + } + + for (NSString* name in [mNativeObject accessibilityAttributeNames]) { + nsAutoString attribName; + nsCocoaUtils::GetStringForNSString(name, attribName); + aAttributeNames.AppendElement(attribName); + } + + return NS_OK; + + NS_OBJC_END_TRY_BLOCK_RETURN(NS_ERROR_FAILURE) +} + +NS_IMETHODIMP +xpcAccessibleMacInterface::GetParameterizedAttributeNames( + nsTArray<nsString>& aAttributeNames) { + NS_OBJC_BEGIN_TRY_BLOCK_RETURN + + if (!mNativeObject || [mNativeObject isExpired]) { + return NS_ERROR_NOT_AVAILABLE; + } + + for (NSString* name in + [mNativeObject accessibilityParameterizedAttributeNames]) { + nsAutoString attribName; + nsCocoaUtils::GetStringForNSString(name, attribName); + aAttributeNames.AppendElement(attribName); + } + + return NS_OK; + + NS_OBJC_END_TRY_BLOCK_RETURN(NS_ERROR_FAILURE) +} + +NS_IMETHODIMP +xpcAccessibleMacInterface::GetActionNames(nsTArray<nsString>& aActionNames) { + NS_OBJC_BEGIN_TRY_BLOCK_RETURN + + if (!mNativeObject || [mNativeObject isExpired]) { + return NS_ERROR_NOT_AVAILABLE; + } + + for (NSString* name in [mNativeObject accessibilityActionNames]) { + nsAutoString actionName; + nsCocoaUtils::GetStringForNSString(name, actionName); + aActionNames.AppendElement(actionName); + } + + return NS_OK; + + NS_OBJC_END_TRY_BLOCK_RETURN(NS_ERROR_FAILURE) +} + +NS_IMETHODIMP +xpcAccessibleMacInterface::PerformAction(const nsAString& aActionName) { + NS_OBJC_BEGIN_TRY_BLOCK_RETURN + + if (!mNativeObject || [mNativeObject isExpired]) { + return NS_ERROR_NOT_AVAILABLE; + } + + NSString* actionName = nsCocoaUtils::ToNSString(aActionName); + [mNativeObject accessibilityPerformAction:actionName]; + + return NS_OK; + + NS_OBJC_END_TRY_BLOCK_RETURN(NS_ERROR_FAILURE) +} + +NS_IMETHODIMP +xpcAccessibleMacInterface::GetAttributeValue(const nsAString& aAttributeName, + JSContext* aCx, + JS::MutableHandleValue aResult) { + NS_OBJC_BEGIN_TRY_BLOCK_RETURN + + if (!mNativeObject || [mNativeObject isExpired]) { + return NS_ERROR_NOT_AVAILABLE; + } + + NSString* attribName = nsCocoaUtils::ToNSString(aAttributeName); + return NSObjectToJsValue( + [mNativeObject accessibilityAttributeValue:attribName], aCx, aResult); + + NS_OBJC_END_TRY_BLOCK_RETURN(NS_ERROR_FAILURE) +} + +NS_IMETHODIMP +xpcAccessibleMacInterface::IsAttributeSettable(const nsAString& aAttributeName, + bool* aIsSettable) { + NS_ENSURE_ARG_POINTER(aIsSettable); + + NSString* attribName = nsCocoaUtils::ToNSString(aAttributeName); + if ([mNativeObject + respondsToSelector:@selector(accessibilityIsAttributeSettable:)]) { + *aIsSettable = [mNativeObject accessibilityIsAttributeSettable:attribName]; + return NS_OK; + } + + return NS_ERROR_NOT_IMPLEMENTED; +} + +NS_IMETHODIMP +xpcAccessibleMacInterface::SetAttributeValue(const nsAString& aAttributeName, + JS::HandleValue aAttributeValue, + JSContext* aCx) { + nsresult rv = NS_OK; + id obj = JsValueToNSObject(aAttributeValue, aCx, &rv); + NS_ENSURE_SUCCESS(rv, rv); + + NSString* attribName = nsCocoaUtils::ToNSString(aAttributeName); + if ([mNativeObject respondsToSelector:@selector(accessibilitySetValue: + forAttribute:)]) { + // The NSObject has an attribute setter, call that. + [mNativeObject accessibilitySetValue:obj forAttribute:attribName]; + return NS_OK; + } + + return NS_ERROR_NOT_IMPLEMENTED; +} + +NS_IMETHODIMP +xpcAccessibleMacInterface::GetParameterizedAttributeValue( + const nsAString& aAttributeName, JS::HandleValue aParameter, JSContext* aCx, + JS::MutableHandleValue aResult) { + nsresult rv = NS_OK; + id paramObj = JsValueToNSObject(aParameter, aCx, &rv); + NS_ENSURE_SUCCESS(rv, rv); + + NSString* attribName = nsCocoaUtils::ToNSString(aAttributeName); + return NSObjectToJsValue([mNativeObject accessibilityAttributeValue:attribName + forParameter:paramObj], + aCx, aResult); +} + +bool xpcAccessibleMacInterface::SupportsSelector(SEL aSelector) { + // return true if we have this selector, and if isAccessibilitySelectorAllowed + // is implemented too whether it is "allowed". + return [mNativeObject respondsToSelector:aSelector] && + (![mNativeObject respondsToSelector:@selector + (isAccessibilitySelectorAllowed:selector:)] || + [mNativeObject isAccessibilitySelectorAllowed:aSelector]); +} + +nsresult xpcAccessibleMacInterface::NSObjectToJsValue( + id aObj, JSContext* aCx, JS::MutableHandleValue aResult) { + if (!aObj) { + aResult.set(JS::NullValue()); + } else if ([aObj isKindOfClass:[NSString class]]) { + nsAutoString strVal; + nsCocoaUtils::GetStringForNSString((NSString*)aObj, strVal); + if (!mozilla::dom::ToJSValue(aCx, strVal, aResult)) { + return NS_ERROR_FAILURE; + } + } else if ([aObj isKindOfClass:[NSNumber class]]) { + // If the type being held by the NSNumber is a BOOL set js value + // to boolean. Otherwise use a double value. + if (strcmp([(NSNumber*)aObj objCType], @encode(BOOL)) == 0) { + if (!mozilla::dom::ToJSValue(aCx, [(NSNumber*)aObj boolValue], aResult)) { + return NS_ERROR_FAILURE; + } + } else { + if (!mozilla::dom::ToJSValue(aCx, [(NSNumber*)aObj doubleValue], + aResult)) { + return NS_ERROR_FAILURE; + } + } + } else if ([aObj isKindOfClass:[NSValue class]] && + strcmp([(NSValue*)aObj objCType], @encode(NSPoint)) == 0) { + NSPoint point = [(NSValue*)aObj pointValue]; + return NSObjectToJsValue( + @[ + [NSNumber numberWithDouble:point.x], + [NSNumber numberWithDouble:point.y] + ], + aCx, aResult); + } else if ([aObj isKindOfClass:[NSValue class]] && + strcmp([(NSValue*)aObj objCType], @encode(NSSize)) == 0) { + NSSize size = [(NSValue*)aObj sizeValue]; + return NSObjectToJsValue( + @[ + [NSNumber numberWithDouble:size.width], + [NSNumber numberWithDouble:size.height] + ], + aCx, aResult); + } else if ([aObj isKindOfClass:[NSValue class]] && + strcmp([(NSValue*)aObj objCType], @encode(NSRange)) == 0) { + NSRange range = [(NSValue*)aObj rangeValue]; + return NSObjectToJsValue(@[ @(range.location), @(range.length) ], aCx, + aResult); + } else if ([aObj isKindOfClass:[NSValue class]] && + strcmp([(NSValue*)aObj objCType], @encode(NSRect)) == 0) { + NSRect rect = [(NSValue*)aObj rectValue]; + return NSObjectToJsValue(@{ + @"origin" : [NSValue valueWithPoint:rect.origin], + @"size" : [NSValue valueWithSize:rect.size] + }, + aCx, aResult); + } else if ([aObj isKindOfClass:[NSArray class]]) { + NSArray* objArr = (NSArray*)aObj; + + JS::RootedVector<JS::Value> v(aCx); + if (!v.resize([objArr count])) { + return NS_ERROR_FAILURE; + } + for (size_t i = 0; i < [objArr count]; ++i) { + nsresult rv = NSObjectToJsValue(objArr[i], aCx, v[i]); + NS_ENSURE_SUCCESS(rv, rv); + } + + JSObject* arrayObj = JS::NewArrayObject(aCx, v); + if (!arrayObj) { + return NS_ERROR_FAILURE; + } + aResult.setObject(*arrayObj); + } else if ([aObj isKindOfClass:[NSDictionary class]]) { + JS::RootedObject obj(aCx, JS_NewPlainObject(aCx)); + for (NSString* key in aObj) { + nsAutoString strKey; + nsCocoaUtils::GetStringForNSString(key, strKey); + JS::RootedValue value(aCx); + nsresult rv = NSObjectToJsValue(aObj[key], aCx, &value); + NS_ENSURE_SUCCESS(rv, rv); + JS_SetUCProperty(aCx, obj, strKey.get(), strKey.Length(), value); + } + aResult.setObject(*obj); + } else if ([aObj isKindOfClass:[NSAttributedString class]]) { + NSAttributedString* attrStr = (NSAttributedString*)aObj; + __block NSMutableArray* attrRunArray = [[NSMutableArray alloc] init]; + + [attrStr + enumerateAttributesInRange:NSMakeRange(0, [attrStr length]) + options: + NSAttributedStringEnumerationLongestEffectiveRangeNotRequired + usingBlock:^(NSDictionary* attributes, NSRange range, + BOOL* stop) { + NSString* str = + [[attrStr string] substringWithRange:range]; + if (!str || !attributes) { + return; + } + + NSMutableDictionary* attrRun = + [attributes mutableCopy]; + attrRun[@"string"] = str; + + [attrRunArray addObject:attrRun]; + }]; + + // The attributed string is represented in js as an array of objects. + // Each object represents a run of text where the "string" property is the + // string value and all the AX* properties are the attributes. + return NSObjectToJsValue(attrRunArray, aCx, aResult); + } else if (CFGetTypeID(aObj) == CGColorGetTypeID()) { + const CGFloat* components = CGColorGetComponents((CGColorRef)aObj); + NSString* hexString = [NSString + stringWithFormat:@"#%02x%02x%02x", (int)(components[0] * 0xff), + (int)(components[1] * 0xff), + (int)(components[2] * 0xff)]; + return NSObjectToJsValue(hexString, aCx, aResult); + } else if ([aObj respondsToSelector:@selector(isAccessibilityElement)]) { + // We expect all of our accessibility objects to implement + // isAccessibilityElement at the very least. If it is implemented we will + // assume its an accessibility object. + nsCOMPtr<nsIAccessibleMacInterface> obj = + new xpcAccessibleMacInterface(aObj); + return nsContentUtils::WrapNative( + aCx, obj, &NS_GET_IID(nsIAccessibleMacInterface), aResult); + } else { + // If this is any other kind of NSObject, just wrap it and return it. + // It will be opaque and immutable on the JS side, but it can be + // brought back to us in an argument. + nsCOMPtr<nsIAccessibleMacNSObjectWrapper> obj = + new xpcAccessibleMacNSObjectWrapper(aObj); + return nsContentUtils::WrapNative( + aCx, obj, &NS_GET_IID(nsIAccessibleMacNSObjectWrapper), aResult); + } + + return NS_OK; +} + +id xpcAccessibleMacInterface::JsValueToNSObject(JS::HandleValue aValue, + JSContext* aCx, + nsresult* aResult) { + *aResult = NS_OK; + if (aValue.isInt32()) { + return [NSNumber numberWithInteger:aValue.toInt32()]; + } else if (aValue.isBoolean()) { + return [NSNumber numberWithBool:aValue.toBoolean()]; + } else if (aValue.isString()) { + nsAutoJSString temp; + if (!temp.init(aCx, aValue)) { + NS_WARNING("cannot init string with given value"); + *aResult = NS_ERROR_FAILURE; + return nil; + } + return nsCocoaUtils::ToNSString(temp); + } else if (aValue.isObject()) { + JS::Rooted<JSObject*> obj(aCx, aValue.toObjectOrNull()); + + bool isArray; + JS::IsArrayObject(aCx, obj, &isArray); + if (isArray) { + // If this is an array, we construct an NSArray and insert the js + // array's elements by recursively calling this function. + uint32_t len; + JS::GetArrayLength(aCx, obj, &len); + NSMutableArray* array = [NSMutableArray arrayWithCapacity:len]; + for (uint32_t i = 0; i < len; i++) { + JS::RootedValue v(aCx); + JS_GetElement(aCx, obj, i, &v); + [array addObject:JsValueToNSObject(v, aCx, aResult)]; + NS_ENSURE_SUCCESS(*aResult, nil); + } + return array; + } + + bool hasValueType; + bool hasValue; + JS_HasOwnProperty(aCx, obj, "valueType", &hasValueType); + JS_HasOwnProperty(aCx, obj, "value", &hasValue); + if (hasValueType && hasValue) { + // A js object representin an NSValue looks like this: + // { valueType: "NSRange", value: [1, 3] } + return JsValueToNSValue(obj, aCx, aResult); + } + + bool hasObjectType; + bool hasObject; + JS_HasOwnProperty(aCx, obj, "objectType", &hasObjectType); + JS_HasOwnProperty(aCx, obj, "object", &hasObject); + if (hasObjectType && hasObject) { + // A js object representing an NSDictionary looks like this: + // { objectType: "NSDictionary", value: {k: v, k: v, ...} } + return JsValueToSpecifiedNSObject(obj, aCx, aResult); + } + + // This may be another nsIAccessibleMacInterface instance. + // If so, return the wrapped NSObject. + nsCOMPtr<nsIXPConnect> xpc = nsIXPConnect::XPConnect(); + + nsCOMPtr<nsIXPConnectWrappedNative> wrappedObj; + nsresult rv = + xpc->GetWrappedNativeOfJSObject(aCx, obj, getter_AddRefs(wrappedObj)); + NS_ENSURE_SUCCESS(rv, nil); + nsCOMPtr<nsIAccessibleMacNSObjectWrapper> macObjIface = + do_QueryInterface(wrappedObj->Native()); + return macObjIface->GetNativeObject(); + } + + *aResult = NS_ERROR_FAILURE; + return nil; +} + +id xpcAccessibleMacInterface::JsValueToNSValue(JS::HandleObject aObject, + JSContext* aCx, + nsresult* aResult) { + *aResult = NS_ERROR_FAILURE; + JS::RootedValue valueTypeValue(aCx); + if (!JS_GetProperty(aCx, aObject, "valueType", &valueTypeValue)) { + NS_WARNING("Could not get valueType"); + return nil; + } + + JS::RootedValue valueValue(aCx); + if (!JS_GetProperty(aCx, aObject, "value", &valueValue)) { + NS_WARNING("Could not get value"); + return nil; + } + + nsAutoJSString valueType; + if (!valueTypeValue.isString() || !valueType.init(aCx, valueTypeValue)) { + NS_WARNING("valueType is not a string"); + return nil; + } + + bool isArray; + JS::IsArrayObject(aCx, valueValue, &isArray); + if (!isArray) { + NS_WARNING("value is not an array"); + return nil; + } + + JS::Rooted<JSObject*> value(aCx, valueValue.toObjectOrNull()); + + if (valueType.EqualsLiteral("NSRange")) { + uint32_t len; + JS::GetArrayLength(aCx, value, &len); + if (len != 2) { + NS_WARNING("Expected a 2 member array"); + return nil; + } + + JS::RootedValue locationValue(aCx); + JS_GetElement(aCx, value, 0, &locationValue); + JS::RootedValue lengthValue(aCx); + JS_GetElement(aCx, value, 1, &lengthValue); + if (!locationValue.isInt32() || !lengthValue.isInt32()) { + NS_WARNING("Expected an array of integers"); + return nil; + } + + *aResult = NS_OK; + return [NSValue valueWithRange:NSMakeRange(locationValue.toInt32(), + lengthValue.toInt32())]; + } + + return nil; +} + +id xpcAccessibleMacInterface::JsValueToSpecifiedNSObject( + JS::HandleObject aObject, JSContext* aCx, nsresult* aResult) { + *aResult = NS_ERROR_FAILURE; + JS::RootedValue objectTypeValue(aCx); + if (!JS_GetProperty(aCx, aObject, "objectType", &objectTypeValue)) { + NS_WARNING("Could not get objectType"); + return nil; + } + + JS::RootedValue objectValue(aCx); + if (!JS_GetProperty(aCx, aObject, "object", &objectValue)) { + NS_WARNING("Could not get object"); + return nil; + } + + nsAutoJSString objectType; + if (!objectTypeValue.isString()) { + NS_WARNING("objectType is not a string"); + return nil; + } + + if (!objectType.init(aCx, objectTypeValue)) { + NS_WARNING("cannot init string with object type"); + return nil; + } + + bool isObject = objectValue.isObjectOrNull(); + if (!isObject) { + NS_WARNING("object is not a JSON object"); + return nil; + } + + JS::Rooted<JSObject*> object(aCx, objectValue.toObjectOrNull()); + + if (objectType.EqualsLiteral("NSDictionary")) { + JS::Rooted<JS::IdVector> ids(aCx, JS::IdVector(aCx)); + if (!JS_Enumerate(aCx, object, &ids)) { + NS_WARNING("Unable to get keys from dictionary object"); + return nil; + } + + NSMutableDictionary* dict = [[NSMutableDictionary alloc] init]; + + for (size_t i = 0, n = ids.length(); i < n; i++) { + nsresult rv = NS_OK; + // get current key + JS::RootedValue currentKey(aCx); + JS_IdToValue(aCx, ids[i], ¤tKey); + id unwrappedKey = JsValueToNSObject(currentKey, aCx, &rv); + NS_ENSURE_SUCCESS(rv, nil); + MOZ_ASSERT([unwrappedKey isKindOfClass:[NSString class]]); + + // get associated value for current key + JS::RootedValue currentValue(aCx); + JS_GetPropertyById(aCx, object, ids[i], ¤tValue); + id unwrappedValue = JsValueToNSObject(currentValue, aCx, &rv); + NS_ENSURE_SUCCESS(rv, nil); + dict[unwrappedKey] = unwrappedValue; + } + + *aResult = NS_OK; + return dict; + } + + return nil; +} + +NS_IMPL_ISUPPORTS(xpcAccessibleMacEvent, nsIAccessibleMacEvent) + +xpcAccessibleMacEvent::xpcAccessibleMacEvent(id aNativeObj, id aData) + : mNativeObject(aNativeObj), mData(aData) { + [mNativeObject retain]; + [mData retain]; +} + +xpcAccessibleMacEvent::~xpcAccessibleMacEvent() { + [mNativeObject release]; + [mData release]; +} + +NS_IMETHODIMP +xpcAccessibleMacEvent::GetMacIface(nsIAccessibleMacInterface** aMacIface) { + RefPtr<xpcAccessibleMacInterface> macIface = + new xpcAccessibleMacInterface(mNativeObject); + macIface.forget(aMacIface); + return NS_OK; +} + +NS_IMETHODIMP +xpcAccessibleMacEvent::GetData(JSContext* aCx, JS::MutableHandleValue aData) { + return xpcAccessibleMacInterface::NSObjectToJsValue(mData, aCx, aData); +} + +void xpcAccessibleMacEvent::FireEvent(id aNativeObj, id aNotification, + id aUserInfo) { + if (nsCOMPtr<nsIObserverService> obsService = + services::GetObserverService()) { + nsCOMPtr<nsISimpleEnumerator> observers; + // Get all observers for the mac event topic. + obsService->EnumerateObservers(NS_ACCESSIBLE_MAC_EVENT_TOPIC, + getter_AddRefs(observers)); + if (observers) { + bool hasObservers = false; + observers->HasMoreElements(&hasObservers); + // If we have observers, notify them. + if (hasObservers) { + nsCOMPtr<nsIAccessibleMacEvent> xpcIface = + new xpcAccessibleMacEvent(aNativeObj, aUserInfo); + nsAutoString notificationStr; + nsCocoaUtils::GetStringForNSString(aNotification, notificationStr); + obsService->NotifyObservers(xpcIface, NS_ACCESSIBLE_MAC_EVENT_TOPIC, + notificationStr.get()); + } + } + } +} |