1 /* 2 * Copyright (C) 2005 Apple Computer, 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 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of 14 * its contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY 18 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 20 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY 21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #import "WebClipView.h" 30 31 #import "WebFrameInternal.h" 32 #import "WebFrameView.h" 33 #import "WebViewPrivate.h" 34 #import <WebCore/FrameView.h> 35 36 // WebClipView's entire reason for existing is to set the clip used by focus ring redrawing. 37 // There's no easy way to prevent the focus ring from drawing outside the passed-in clip rectangle 38 // because it expects to have to draw outside the bounds of the view it's being drawn for. 39 // But it looks for the enclosing clip view, which gives us a hook we can use to control it. 40 // The "additional clip" is a clip for focus ring redrawing. 41 42 // FIXME: Change terminology from "additional clip" to "focus ring clip". 43 44 using namespace WebCore; 45 46 @interface NSView (WebViewMethod) 47 - (WebView *)_webView; 48 @end 49 50 @interface NSClipView (WebNSClipViewDetails) 51 - (void)_immediateScrollToPoint:(NSPoint)newOrigin; 52 @end 53 54 #if !defined(BUILDING_ON_TIGER) && !defined(BUILDING_ON_LEOPARD) 55 @interface NSWindow (WebNSWindowDetails) 56 - (void)_disableDelayedWindowDisplay; 57 - (void)_enableDelayedWindowDisplay; 58 @end 59 #endif 60 61 @implementation WebClipView 62 63 - (id)initWithFrame:(NSRect)frame 64 { 65 self = [super initWithFrame:frame]; 66 if (!self) 67 return nil; 68 69 // In WebHTMLView, we set a clip. This is not typical to do in an 70 // NSView, and while correct for any one invocation of drawRect:, 71 // it causes some bad problems if that clip is cached between calls. 72 // The cached graphics state, which clip views keep around, does 73 // cache the clip in this undesirable way. Consequently, we want to 74 // release the GState for all clip views for all views contained in 75 // a WebHTMLView. Here we do it for subframes, which use WebClipView. 76 // See these bugs for more information: 77 // <rdar://problem/3409315>: REGRESSSION (7B58-7B60)?: Safari draws blank frames on macosx.apple.com perf page 78 [self releaseGState]; 79 80 return self; 81 } 82 83 #if USE(ACCELERATED_COMPOSITING) 84 - (NSRect)visibleRect 85 { 86 if (!_isScrolling) 87 return [super visibleRect]; 88 89 WebFrameView *webFrameView = (WebFrameView *)[[self superview] superview]; 90 if (![webFrameView isKindOfClass:[WebFrameView class]]) 91 return [super visibleRect]; 92 93 if (Frame* coreFrame = core([webFrameView webFrame])) { 94 if (FrameView* frameView = coreFrame->view()) { 95 if (frameView->isEnclosedInCompositingLayer()) 96 return [self bounds]; 97 } 98 } 99 100 return [super visibleRect]; 101 } 102 103 - (void)_immediateScrollToPoint:(NSPoint)newOrigin 104 { 105 _isScrolling = YES; 106 107 #if !defined(BUILDING_ON_TIGER) && !defined(BUILDING_ON_LEOPARD) 108 [[self window] _disableDelayedWindowDisplay]; 109 #endif 110 111 [super _immediateScrollToPoint:newOrigin]; 112 113 #if !defined(BUILDING_ON_TIGER) && !defined(BUILDING_ON_LEOPARD) 114 [[self window] _enableDelayedWindowDisplay]; 115 #endif 116 117 _isScrolling = NO; 118 } 119 #endif 120 121 - (void)resetAdditionalClip 122 { 123 ASSERT(_haveAdditionalClip); 124 _haveAdditionalClip = NO; 125 } 126 127 - (void)setAdditionalClip:(NSRect)additionalClip 128 { 129 ASSERT(!_haveAdditionalClip); 130 _haveAdditionalClip = YES; 131 _additionalClip = additionalClip; 132 } 133 134 - (BOOL)hasAdditionalClip 135 { 136 return _haveAdditionalClip; 137 } 138 139 - (NSRect)additionalClip 140 { 141 ASSERT(_haveAdditionalClip); 142 return _additionalClip; 143 } 144 145 - (NSRect)_focusRingVisibleRect 146 { 147 NSRect rect = [self visibleRect]; 148 if (_haveAdditionalClip) { 149 rect = NSIntersectionRect(rect, _additionalClip); 150 } 151 return rect; 152 } 153 154 - (void)scrollWheel:(NSEvent *)event 155 { 156 NSView *docView = [self documentView]; 157 if ([docView respondsToSelector:@selector(_webView)]) { 158 #if ENABLE(DASHBOARD_SUPPORT) 159 WebView *wv = [docView _webView]; 160 if ([wv _dashboardBehavior:WebDashboardBehaviorAllowWheelScrolling]) { 161 [super scrollWheel:event]; 162 } 163 #endif 164 return; 165 } 166 [super scrollWheel:event]; 167 } 168 169 @end 170