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/*
* Copyright (C) 2005, 2007, 2008 Apple Inc. All rights reserved.
* Copyright (C) 2011 Google 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:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of Google Inc. 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 THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
* OWNER OR 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.
*/
#include "config.h"
#include "public/web/mac/WebSubstringUtil.h"
#import <Cocoa/Cocoa.h>
#include "bindings/v8/ExceptionStatePlaceholder.h"
#include "core/dom/Document.h"
#include "core/dom/Element.h"
#include "core/dom/Node.h"
#include "core/dom/Range.h"
#include "core/editing/FrameSelection.h"
#include "core/editing/PlainTextRange.h"
#include "core/editing/TextIterator.h"
#include "core/frame/FrameView.h"
#include "core/frame/LocalFrame.h"
#include "core/html/HTMLElement.h"
#include "core/rendering/HitTestResult.h"
#include "core/rendering/RenderObject.h"
#include "core/rendering/style/RenderStyle.h"
#include "platform/fonts/Font.h"
#include "platform/mac/ColorMac.h"
#include "public/platform/WebRect.h"
#include "public/web/WebHitTestResult.h"
#include "public/web/WebRange.h"
#include "public/web/WebView.h"
#include "web/WebLocalFrameImpl.h"
using namespace WebCore;
static NSAttributedString* attributedSubstringFromRange(const Range* range)
{
NSMutableAttributedString* string = [[NSMutableAttributedString alloc] init];
NSMutableDictionary* attrs = [NSMutableDictionary dictionary];
size_t length = range->endOffset() - range->startOffset();
unsigned position = 0;
for (TextIterator it(range); !it.atEnd() && [string length] < length; it.advance()) {
unsigned numCharacters = it.length();
if (!numCharacters)
continue;
Node* container = it.range()->startContainer();
RenderObject* renderer = container->renderer();
ASSERT(renderer);
if (!renderer)
continue;
RenderStyle* style = renderer->style();
NSFont* font = style->font().primaryFont()->getNSFont();
// If the platform font can't be loaded, it's likely that the site is
// using a web font. For now, just use the default font instead.
// TODO(rsesek): Change the font activation flags to allow other processes
// to use the font.
if (!font)
font = [NSFont systemFontOfSize:style->font().fontDescription().computedSize()];
[attrs setObject:font forKey:NSFontAttributeName];
if (style->visitedDependentColor(CSSPropertyColor).alpha())
[attrs setObject:nsColor(style->visitedDependentColor(CSSPropertyColor)) forKey:NSForegroundColorAttributeName];
else
[attrs removeObjectForKey:NSForegroundColorAttributeName];
if (style->visitedDependentColor(CSSPropertyBackgroundColor).alpha())
[attrs setObject:nsColor(style->visitedDependentColor(CSSPropertyBackgroundColor)) forKey:NSBackgroundColorAttributeName];
else
[attrs removeObjectForKey:NSBackgroundColorAttributeName];
Vector<UChar> characters;
it.appendTextTo(characters);
NSString* substring =
[[[NSString alloc] initWithCharacters:characters.data()
length:characters.size()] autorelease];
[string replaceCharactersInRange:NSMakeRange(position, 0)
withString:substring];
[string setAttributes:attrs range:NSMakeRange(position, numCharacters)];
position += numCharacters;
}
return [string autorelease];
}
namespace blink {
NSAttributedString* WebSubstringUtil::attributedWordAtPoint(WebView* view, WebPoint point, WebPoint& baselinePoint)
{
HitTestResult result = view->hitTestResultAt(point);
if (!result.targetNode())
return nil;
LocalFrame* frame = result.targetNode()->document().frame();
FrameView* frameView = frame->view();
RefPtrWillBeRawPtr<Range> range = frame->rangeForPoint(result.roundedPointInInnerNodeFrame());
if (!range)
return nil;
// Expand to word under point.
VisibleSelection selection(range.get());
selection.expandUsingGranularity(WordGranularity);
RefPtrWillBeRawPtr<Range> wordRange = selection.toNormalizedRange();
// Convert to NSAttributedString.
NSAttributedString* string = attributedSubstringFromRange(wordRange.get());
// Compute bottom left corner and convert to AppKit coordinates.
IntRect stringRect = enclosingIntRect(wordRange->boundingRect());
IntPoint stringPoint = stringRect.minXMaxYCorner();
stringPoint.setY(frameView->height() - stringPoint.y());
// Adjust for the font's descender. AppKit wants the baseline point.
if ([string length]) {
NSDictionary* attributes = [string attributesAtIndex:0 effectiveRange:NULL];
NSFont* font = [attributes objectForKey:NSFontAttributeName];
if (font)
stringPoint.move(0, ceil(-[font descender]));
}
baselinePoint = stringPoint;
return string;
}
NSAttributedString* WebSubstringUtil::attributedSubstringInRange(WebLocalFrame* webFrame, size_t location, size_t length)
{
LocalFrame* frame = toWebLocalFrameImpl(webFrame)->frame();
if (frame->view()->needsLayout())
frame->view()->layout();
Element* editable = frame->selection().rootEditableElementOrDocumentElement();
ASSERT(editable);
RefPtrWillBeRawPtr<Range> range(PlainTextRange(location, location + length).createRange(*editable));
if (!range)
return nil;
return attributedSubstringFromRange(range.get());
}
} // namespace blink
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