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Diffstat (limited to 'Source/WebKit2/WebProcess/WebPage/mac/AccessibilityWebPageObject.mm')
| -rw-r--r-- | Source/WebKit2/WebProcess/WebPage/mac/AccessibilityWebPageObject.mm | 190 |
1 files changed, 190 insertions, 0 deletions
diff --git a/Source/WebKit2/WebProcess/WebPage/mac/AccessibilityWebPageObject.mm b/Source/WebKit2/WebProcess/WebPage/mac/AccessibilityWebPageObject.mm new file mode 100644 index 0000000..fa4aa1a --- /dev/null +++ b/Source/WebKit2/WebProcess/WebPage/mac/AccessibilityWebPageObject.mm @@ -0,0 +1,190 @@ +/* + * Copyright (C) 2011 Apple Inc. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, + * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS + * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF + * THE POSSIBILITY OF SUCH DAMAGE. + */ + +#import "AccessibilityWebPageObject.h" + +#import "WebFrame.h" +#import "WebPage.h" +#import <WebCore/AXObjectCache.h> +#import <WebCore/Frame.h> +#import <WebCore/FrameView.h> +#import <WebCore/ScrollView.h> +#import <WebCore/Scrollbar.h> + +using namespace WebCore; +using namespace WebKit; + +@implementation AccessibilityWebPageObject + +- (id)accessibilityRootObjectWrapper +{ + WebCore::Page* page = m_page->corePage(); + if (!page) + return nil; + + WebCore::Frame* core = page->mainFrame(); + if (!core || !core->document()) + return nil; + + AccessibilityObject* root = core->document()->axObjectCache()->rootObject(); + if (!root) + return nil; + + return root->wrapper(); +} + +- (void)setWebPage:(WebPage*)page +{ + m_page = page; +} + +- (void)setRemoteParent:(id)parent +{ + if (parent != m_parent) { + [m_parent release]; + m_parent = [parent retain]; + } +} + +- (void)dealloc +{ + [m_accessibilityChildren release]; + [m_attributeNames release]; + [m_parent release]; + [super dealloc]; +} + +- (BOOL)accessibilityIsIgnored +{ + return NO; +} + +- (NSArray *)accessibilityAttributeNames +{ + if (!m_attributeNames) + m_attributeNames = [[NSArray alloc] initWithObjects: + NSAccessibilityRoleAttribute, NSAccessibilityRoleDescriptionAttribute, NSAccessibilityFocusedAttribute, + NSAccessibilityParentAttribute, NSAccessibilityWindowAttribute, NSAccessibilityTopLevelUIElementAttribute, + NSAccessibilityPositionAttribute, NSAccessibilitySizeAttribute, NSAccessibilityChildrenAttribute, nil]; + + return m_attributeNames; +} + +- (BOOL)accessibilityIsAttributeSettable:(NSString *)attribute +{ + return NO; +} + +- (void)accessibilitySetValue:(id)value forAttribute:(NSString *)attribute +{ + return; +} + +- (NSArray *)accessibilityActionNames +{ + return [NSArray array]; +} + +- (NSArray *)accessibilityChildren +{ + id wrapper = [self accessibilityRootObjectWrapper]; + if (!wrapper) + return [NSArray array]; + + return [NSArray arrayWithObject:wrapper]; +} + +- (id)accessibilityAttributeValue:(NSString *)attribute +{ + if (!WebCore::AXObjectCache::accessibilityEnabled()) + WebCore::AXObjectCache::enableAccessibility(); + + if ([attribute isEqualToString:NSAccessibilityParentAttribute]) + return m_parent; + if ([attribute isEqualToString:NSAccessibilityWindowAttribute]) + return [m_parent accessibilityAttributeValue:NSAccessibilityWindowAttribute]; + if ([attribute isEqualToString:NSAccessibilityTopLevelUIElementAttribute]) + return [m_parent accessibilityAttributeValue:NSAccessibilityTopLevelUIElementAttribute]; + if ([attribute isEqualToString:NSAccessibilityRoleAttribute]) + return NSAccessibilityGroupRole; + if ([attribute isEqualToString:NSAccessibilityRoleDescriptionAttribute]) + return NSAccessibilityRoleDescription(NSAccessibilityGroupRole, nil); + if ([attribute isEqualToString:NSAccessibilityFocusedAttribute]) + return [NSNumber numberWithBool:NO]; + + if (!m_page) + return nil; + + if ([attribute isEqualToString:NSAccessibilityPositionAttribute]) { + WebCore::IntPoint point = m_page->accessibilityPosition(); + return [NSValue valueWithPoint:NSMakePoint(point.x(), point.y())]; + } + if ([attribute isEqualToString:NSAccessibilitySizeAttribute]) { + const IntSize& s = m_page->size(); + return [NSValue valueWithSize:NSMakeSize(s.width(), s.height())]; + } + if ([attribute isEqualToString:NSAccessibilityChildrenAttribute]) + return [self accessibilityChildren]; + + return [super accessibilityAttributeValue:attribute]; +} + +- (BOOL)accessibilityShouldUseUniqueId +{ + return YES; +} + +- (id)accessibilityHitTest:(NSPoint)point +{ + // Hit-test point comes in as bottom-screen coordinates. Needs to be normalized to the frame of the web page. + NSPoint remotePosition = [[self accessibilityAttributeValue:NSAccessibilityPositionAttribute] pointValue]; + NSSize remoteSize = [[self accessibilityAttributeValue:NSAccessibilitySizeAttribute] sizeValue]; + + // Get the y position of the WKView (we have to screen-flip and go from bottom left to top left). + CGFloat screenHeight = [[[NSScreen screens] objectAtIndex:0] frame].size.height; + remotePosition.y = (screenHeight - remotePosition.y) - remoteSize.height; + + point.y = screenHeight - point.y; + + // Re-center point into the web page's frame. + point.y -= remotePosition.y; + point.x -= remotePosition.x; + + WebCore::FrameView* fv = m_page->mainFrame()->coreFrame()->view(); + if (fv) { + point.y += fv->scrollPosition().y(); + point.x += fv->scrollPosition().x(); + } + + return [[self accessibilityRootObjectWrapper] accessibilityHitTest:point]; +} + +- (id)accessibilityFocusedUIElement +{ + return NSAccessibilityUnignoredDescendant(self); +} + + +@end |