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/TextIterator.h" 45 #include "core/html/HTMLElement.h" 46 #include "core/page/Frame.h" 47 #include "core/page/FrameView.h" 48 #include "core/platform/graphics/Font.h" 49 #include "core/platform/graphics/mac/ColorMac.h" 50 #include "core/rendering/RenderObject.h" 51 #include "core/rendering/style/RenderStyle.h" 52 #include "public/platform/WebRect.h" 53 54 using namespace WebCore; 55 56 namespace WebKit { 57 58 NSAttributedString* WebSubstringUtil::attributedSubstringInRange(WebFrame* webFrame, size_t location, size_t length) 59 { 60 Frame* frame = static_cast<WebFrameImpl*>(webFrame)->frame(); 61 if (frame->view()->needsLayout()) 62 frame->view()->layout(); 63 64 RefPtr<Range> range(TextIterator::rangeFromLocationAndLength(frame->selection()->rootEditableElementOrDocumentElement(), location, length)); 65 if (!range) 66 return nil; 67 68 NSMutableAttributedString* string = [[NSMutableAttributedString alloc] init]; 69 NSMutableDictionary* attrs = [NSMutableDictionary dictionary]; 70 71 unsigned position = 0; 72 for (TextIterator it(range.get()); !it.atEnd() && [string length] < length; it.advance()) { 73 unsigned numCharacters = it.length(); 74 if (!numCharacters) 75 continue; 76 77 Node* container = it.range()->startContainer(IGNORE_EXCEPTION); 78 RenderObject* renderer = container->renderer(); 79 ASSERT(renderer); 80 if (!renderer) 81 continue; 82 83 RenderStyle* style = renderer->style(); 84 NSFont* font = style->font().primaryFont()->getNSFont(); 85 // If the platform font can't be loaded, it's likely that the site is 86 // using a web font. For now, just use the default font instead. 87 // TODO(rsesek): Change the font activation flags to allow other processes 88 // to use the font. 89 if (!font) 90 font = [NSFont systemFontOfSize:style->font().size()]; 91 [attrs setObject:font forKey:NSFontAttributeName]; 92 93 if (style->visitedDependentColor(CSSPropertyColor).alpha()) 94 [attrs setObject:nsColor(renderer->resolveColor(CSSPropertyColor)) forKey:NSForegroundColorAttributeName]; 95 else 96 [attrs removeObjectForKey:NSForegroundColorAttributeName]; 97 if (style->visitedDependentColor(CSSPropertyBackgroundColor).alpha()) 98 [attrs setObject:nsColor(renderer->resolveColor(CSSPropertyBackgroundColor)) forKey:NSBackgroundColorAttributeName]; 99 else 100 [attrs removeObjectForKey:NSBackgroundColorAttributeName]; 101 102 Vector<UChar> characters; 103 it.appendTextTo(characters); 104 NSString* substring = 105 [[[NSString alloc] initWithCharacters:characters.data() 106 length:characters.size()] autorelease]; 107 [string replaceCharactersInRange:NSMakeRange(position, 0) 108 withString:substring]; 109 [string setAttributes:attrs range:NSMakeRange(position, numCharacters)]; 110 position += numCharacters; 111 } 112 return [string autorelease]; 113 } 114 115 } // namespace WebKit 116