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