--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/webengine/osswebengine/WebKit/WebInspector/WebNodeHighlightView.m	Mon Mar 30 12:54:55 2009 +0300
@@ -0,0 +1,175 @@
+/*
+ * Copyright (C) 2006 Apple Computer, 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. 
+ * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
+ *     its contributors may be used to endorse or promote products derived
+ *     from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE 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 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 "WebNodeHighlightView.h"
+#import "WebNodeHighlight.h"
+#import "WebNSViewExtras.h"
+
+#import <WebKit/DOMCore.h>
+#import <WebKit/DOMExtensions.h>
+
+#import <JavaScriptCore/Assertions.h>
+
+#define OVERLAY_MAX_ALPHA 0.7
+#define OVERLAY_WHITE_VALUE 0.1
+
+#define WHITE_FRAME_THICKNESS 1.0
+
+@interface WebNodeHighlightView (FileInternal)
+- (NSArray *)_holes;
+@end
+
+@implementation WebNodeHighlightView
+
+- (id)initWithWebNodeHighlight:(WebNodeHighlight *)webNodeHighlight
+{
+    self = [self initWithFrame:NSZeroRect];
+    if (!self)
+        return nil;
+
+    _webNodeHighlight = [webNodeHighlight retain];
+
+    return self;
+}
+
+- (void)dealloc
+{
+    [self detachFromWebNodeHighlight];
+    [super dealloc];
+}
+
+- (void)detachFromWebNodeHighlight
+{
+    [_webNodeHighlight release];
+    _webNodeHighlight = nil;
+}
+
+- (void)drawRect:(NSRect)rect 
+{
+    [NSGraphicsContext saveGraphicsState];
+
+    // draw translucent gray fill, out of which we will cut holes
+    [[NSColor colorWithCalibratedWhite:OVERLAY_WHITE_VALUE alpha:(_fractionFadedIn * OVERLAY_MAX_ALPHA)] set];
+    NSRectFill(rect);
+
+    // determine set of holes
+    NSArray *holes = [self _holes];
+    int holeCount = [holes count];
+    int holeIndex;
+
+    // Draw white frames around holes in first pass, so they will be erased in
+    // places where holes overlap or abut.
+    [[NSColor colorWithCalibratedWhite:1.0 alpha:_fractionFadedIn] set];
+
+    // white frame is just outside of the hole that the delegate returned
+    for (holeIndex = 0; holeIndex < holeCount; ++holeIndex) {
+        NSRect hole = [[holes objectAtIndex:holeIndex] rectValue];
+        hole = NSInsetRect(hole, -WHITE_FRAME_THICKNESS, -WHITE_FRAME_THICKNESS);
+        NSRectFill(hole);
+    }
+
+    [[NSColor clearColor] set];
+
+    // Erase holes in second pass.
+    for (holeIndex = 0; holeIndex < holeCount; ++holeIndex)
+        NSRectFill([[holes objectAtIndex:holeIndex] rectValue]);
+
+    [NSGraphicsContext restoreGraphicsState];
+}
+
+- (WebNodeHighlight *)webNodeHighlight
+{
+    return _webNodeHighlight;
+}
+
+- (float)fractionFadedIn
+{
+    return _fractionFadedIn;
+}
+
+- (void)setFractionFadedIn:(float)fraction
+{
+    ASSERT_ARG(fraction, fraction >= 0.0 && fraction <= 1.0);
+
+    if (_fractionFadedIn == fraction)
+        return;
+    
+    _fractionFadedIn = fraction;
+    [self setNeedsDisplay:YES];
+}
+
+- (void)setHolesNeedUpdateInRect:(NSRect)rect
+{
+    // Redisplay a slightly larger rect to account for white border around holes
+    rect = NSInsetRect(rect, -1 * WHITE_FRAME_THICKNESS, 
+                             -1 * WHITE_FRAME_THICKNESS);
+
+    [self setNeedsDisplayInRect:rect];
+}
+
+@end
+
+@implementation WebNodeHighlightView (FileInternal)
+
+- (NSArray *)_holes
+{
+    DOMNode *node = [_webNodeHighlight highlightedNode];
+
+    // FIXME: node view needs to be the correct frame document view, it isn't always the main frame
+    NSView *nodeView = [_webNodeHighlight targetView];
+
+    NSArray *lineBoxRects = nil;
+    if ([node isKindOfClass:[DOMElement class]]) {
+        DOMCSSStyleDeclaration *style = [[node ownerDocument] getComputedStyle:(DOMElement *)node pseudoElement:@""];
+        if ([[style getPropertyValue:@"display"] isEqualToString:@"inline"])
+            lineBoxRects = [node lineBoxRects];
+    } else if ([node isKindOfClass:[DOMText class]]) {
+#if ENABLE(SVG)
+        if (![[node parentNode] isKindOfClass:NSClassFromString(@"DOMSVGElement")])
+#endif
+            lineBoxRects = [node lineBoxRects];
+    }
+
+    if (![lineBoxRects count]) {
+        NSRect boundingBox = [nodeView _web_convertRect:[node boundingBox] toView:self];
+        return [NSArray arrayWithObject:[NSValue valueWithRect:boundingBox]];
+    }
+
+    NSMutableArray *rects = [[NSMutableArray alloc] initWithCapacity:[lineBoxRects count]];
+
+    unsigned lineBoxRectCount = [lineBoxRects count];
+    for (unsigned lineBoxRectIndex = 0; lineBoxRectIndex < lineBoxRectCount; ++lineBoxRectIndex) {
+        NSRect r = [[lineBoxRects objectAtIndex:lineBoxRectIndex] rectValue];
+        NSRect overlayViewRect = [nodeView _web_convertRect:r toView:self];
+        [rects addObject:[NSValue valueWithRect:overlayViewRect]];
+    }
+
+    return [rects autorelease];
+}
+
+@end