WebNodeHighlighter.mm   [plain text]

/*
* Copyright (C) 2006, 2007 Apple 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 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 "WebNodeHighlighter.h"

#import "DOMNodeInternal.h"
#import "WebFrameView.h"
#import "WebNodeHighlight.h"
#import "WebNodeHighlightView.h"
#import "WebViewInternal.h"
#import <WebCore/Page.h>

@implementation WebNodeHighlighter

- (id)initWithInspectedWebView:(WebView *)webView
{
if (!(self = [super init]))
return nil;

// Don't retain to avoid a circular reference.
_inspectedWebView = webView;

return self;
}

- (void)dealloc
{
ASSERT(!_currentHighlight);
[super dealloc];
}

// MARK: -

- (void)highlight
{
#if !PLATFORM(IOS_FAMILY)
// The scrollview's content view stays around between page navigations, so target it.
NSView *view = [[[[[_inspectedWebView mainFrame] frameView] documentView] enclosingScrollView] contentView];
#else
NSView *view = _inspectedWebView;
#endif
if (![view window])
return; // Skip the highlight if we have no window (e.g. hidden tab).

if (!_currentHighlight) {
_currentHighlight = [[WebNodeHighlight alloc] initWithTargetView:view inspectorController:&[_inspectedWebView page]->inspectorController()];
[_currentHighlight setDelegate:self];
[_currentHighlight attach];
} else {
#if !PLATFORM(IOS_FAMILY)
[[_currentHighlight highlightView] setNeedsDisplay:YES];
#else
[_currentHighlight setNeedsDisplay];
#endif
}
}

- (void)hideHighlight
{
[_currentHighlight detach];
[_currentHighlight setDelegate:nil];
[_currentHighlight release];
_currentHighlight = nil;
}

// MARK: -
// MARK: WebNodeHighlight delegate

- (void)didAttachWebNodeHighlight:(WebNodeHighlight *)highlight
{
[_inspectedWebView setCurrentNodeHighlight:highlight];
}

- (void)willDetachWebNodeHighlight:(WebNodeHighlight *)highlight
{
[_inspectedWebView setCurrentNodeHighlight:nil];
}

@end