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      1 /*
      2  * Copyright (C) 2006, 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  *
      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 "WebNodeHighlighter.h"
     30 
     31 #import "DOMNodeInternal.h"
     32 #import "WebNodeHighlight.h"
     33 #import "WebViewInternal.h"
     34 #import <WebCore/Page.h>
     35 
     36 @implementation WebNodeHighlighter
     37 
     38 - (id)initWithInspectedWebView:(WebView *)webView
     39 {
     40     if (!(self = [super init]))
     41         return nil;
     42 
     43     // Don't retain to avoid a circular reference.
     44     _inspectedWebView = webView;
     45 
     46     return self;
     47 }
     48 
     49 - (void)dealloc
     50 {
     51     ASSERT(!_currentHighlight);
     52     [super dealloc];
     53 }
     54 
     55 // MARK: -
     56 
     57 - (void)highlightNode:(DOMNode *)node
     58 {
     59     // The scrollview's content view stays around between page navigations, so target it.
     60     NSView *view = [[[[[_inspectedWebView mainFrame] frameView] documentView] enclosingScrollView] contentView];
     61     if (![view window])
     62         return; // Skip the highlight if we have no window (e.g. hidden tab).
     63 
     64     if (!_currentHighlight) {
     65         _currentHighlight = [[WebNodeHighlight alloc] initWithTargetView:view inspectorController:[_inspectedWebView page]->inspectorController()];
     66         [_currentHighlight setDelegate:self];
     67         [_currentHighlight attach];
     68     } else
     69         [[_currentHighlight highlightView] setNeedsDisplay:YES];
     70 }
     71 
     72 - (void)hideHighlight
     73 {
     74     [_currentHighlight detach];
     75     [_currentHighlight setDelegate:nil];
     76     [_currentHighlight release];
     77     _currentHighlight = nil;
     78 }
     79 
     80 // MARK: -
     81 // MARK: WebNodeHighlight delegate
     82 
     83 - (void)didAttachWebNodeHighlight:(WebNodeHighlight *)highlight
     84 {
     85     [_inspectedWebView setCurrentNodeHighlight:highlight];
     86 }
     87 
     88 - (void)willDetachWebNodeHighlight:(WebNodeHighlight *)highlight
     89 {
     90     [_inspectedWebView setCurrentNodeHighlight:nil];
     91 }
     92 
     93 @end
     94