1/* 2 * Copyright (C) 2005, 2007, 2008 Apple Inc. All rights reserved. 3 * Copyright (C) 2011 Google Inc. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are 7 * met: 8 * 9 * * Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * * Redistributions in binary form must reproduce the above 12 * copyright notice, this list of conditions and the following disclaimer 13 * in the documentation and/or other materials provided with the 14 * distribution. 15 * * Neither the name of Google Inc. nor the names of its 16 * contributors may be used to endorse or promote products derived from 17 * this software without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32#include "config.h" 33#include "WebSubstringUtil.h" 34 35#import <Cocoa/Cocoa.h> 36 37#include "WebFrameImpl.h" 38#include "bindings/v8/ExceptionStatePlaceholder.h" 39#include "core/dom/Document.h" 40#include "core/dom/Element.h" 41#include "core/dom/Node.h" 42#include "core/dom/Range.h" 43#include "core/editing/FrameSelection.h" 44#include "core/editing/PlainTextRange.h" 45#include "core/editing/TextIterator.h" 46#include "core/html/HTMLElement.h" 47#include "core/frame/Frame.h" 48#include "core/frame/FrameView.h" 49#include "core/rendering/RenderObject.h" 50#include "core/rendering/style/RenderStyle.h" 51#include "platform/fonts/Font.h" 52#include "platform/mac/ColorMac.h" 53#include "public/platform/WebRect.h" 54 55using namespace WebCore; 56 57namespace blink { 58 59NSAttributedString* WebSubstringUtil::attributedSubstringInRange(WebFrame* webFrame, size_t location, size_t length) 60{ 61 Frame* frame = toWebFrameImpl(webFrame)->frame(); 62 if (frame->view()->needsLayout()) 63 frame->view()->layout(); 64 65 Element* editable = frame->selection().rootEditableElementOrDocumentElement(); 66 ASSERT(editable); 67 RefPtr<Range> range(PlainTextRange(location, location + length).createRange(*editable)); 68 if (!range) 69 return nil; 70 71 NSMutableAttributedString* string = [[NSMutableAttributedString alloc] init]; 72 NSMutableDictionary* attrs = [NSMutableDictionary dictionary]; 73 74 unsigned position = 0; 75 for (TextIterator it(range.get()); !it.atEnd() && [string length] < length; it.advance()) { 76 unsigned numCharacters = it.length(); 77 if (!numCharacters) 78 continue; 79 80 Node* container = it.range()->startContainer(IGNORE_EXCEPTION); 81 RenderObject* renderer = container->renderer(); 82 ASSERT(renderer); 83 if (!renderer) 84 continue; 85 86 RenderStyle* style = renderer->style(); 87 NSFont* font = style->font().primaryFont()->getNSFont(); 88 // If the platform font can't be loaded, it's likely that the site is 89 // using a web font. For now, just use the default font instead. 90 // TODO(rsesek): Change the font activation flags to allow other processes 91 // to use the font. 92 if (!font) 93 font = [NSFont systemFontOfSize:style->font().size()]; 94 [attrs setObject:font forKey:NSFontAttributeName]; 95 96 if (style->visitedDependentColor(CSSPropertyColor).alpha()) 97 [attrs setObject:nsColor(style->visitedDependentColor(CSSPropertyColor)) forKey:NSForegroundColorAttributeName]; 98 else 99 [attrs removeObjectForKey:NSForegroundColorAttributeName]; 100 if (style->visitedDependentColor(CSSPropertyBackgroundColor).alpha()) 101 [attrs setObject:nsColor(style->visitedDependentColor(CSSPropertyBackgroundColor)) forKey:NSBackgroundColorAttributeName]; 102 else 103 [attrs removeObjectForKey:NSBackgroundColorAttributeName]; 104 105 Vector<UChar> characters; 106 it.appendTextTo(characters); 107 NSString* substring = 108 [[[NSString alloc] initWithCharacters:characters.data() 109 length:characters.size()] autorelease]; 110 [string replaceCharactersInRange:NSMakeRange(position, 0) 111 withString:substring]; 112 [string setAttributes:attrs range:NSMakeRange(position, numCharacters)]; 113 position += numCharacters; 114 } 115 return [string autorelease]; 116} 117 118} // namespace blink 119