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      1 /*
      2  * Copyright (C) 2007 Apple Inc. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions
      6  * are met:
      7  * 1. Redistributions of source code must retain the above copyright
      8  *    notice, this list of conditions and the following disclaimer.
      9  * 2. Redistributions in binary form must reproduce the above copyright
     10  *    notice, this list of conditions and the following disclaimer in the
     11  *    documentation and/or other materials provided with the distribution.
     12  *
     13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
     14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
     17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
     21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     24  */
     25 
     26 #import "config.h"
     27 #import "SelectionController.h"
     28 
     29 #import "AXObjectCache.h"
     30 #import "Frame.h"
     31 #import "RenderView.h"
     32 #import "WebCoreViewFactory.h"
     33 
     34 namespace WebCore {
     35 
     36 static CGRect accessibilityConvertScreenRect(CGRect bounds)
     37 {
     38     NSArray *screens = [NSScreen screens];
     39     if ([screens count]) {
     40         CGFloat screenHeight = NSHeight([[screens objectAtIndex:0] frame]);
     41         bounds.origin.y = (screenHeight - (bounds.origin.y + bounds.size.height));
     42     } else
     43         bounds = CGRectZero;
     44 
     45     return bounds;
     46 }
     47 
     48 
     49 void SelectionController::notifyAccessibilityForSelectionChange()
     50 {
     51     Document* document = m_frame->document();
     52 
     53     if (AXObjectCache::accessibilityEnabled() && m_selection.start().isNotNull() && m_selection.end().isNotNull())
     54         document->axObjectCache()->postNotification(m_selection.start().deprecatedNode()->renderer(), AXObjectCache::AXSelectedTextChanged, false);
     55 
     56     // if zoom feature is enabled, insertion point changes should update the zoom
     57     if (!UAZoomEnabled() || !m_selection.isCaret())
     58         return;
     59 
     60     RenderView* renderView = document->renderView();
     61     if (!renderView)
     62         return;
     63     FrameView* frameView = m_frame->view();
     64     if (!frameView)
     65         return;
     66 
     67     IntRect selectionRect = absoluteCaretBounds();
     68     IntRect viewRect = renderView->viewRect();
     69 
     70     selectionRect = frameView->contentsToScreen(selectionRect);
     71     viewRect = frameView->contentsToScreen(viewRect);
     72     CGRect cgCaretRect = CGRectMake(selectionRect.x(), selectionRect.y(), selectionRect.width(), selectionRect.height());
     73     CGRect cgViewRect = CGRectMake(viewRect.x(), viewRect.y(), viewRect.width(), viewRect.height());
     74     cgCaretRect = accessibilityConvertScreenRect(cgCaretRect);
     75     cgViewRect = accessibilityConvertScreenRect(cgViewRect);
     76 
     77     UAZoomChangeFocus(&cgViewRect, &cgCaretRect, kUAZoomFocusTypeInsertionPoint);
     78 }
     79 
     80 } // namespace WebCore
     81