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      1 /*
      2  * Copyright (C) 2005, 2006 Apple Computer, 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 "WebStringTruncator.h"
     30 
     31 #import "WebSystemInterface.h"
     32 #import <WebCore/Font.h>
     33 #import <WebCore/FontPlatformData.h>
     34 #import <WebCore/PlatformString.h>
     35 #import <WebCore/StringTruncator.h>
     36 #import <wtf/StdLibExtras.h>
     37 
     38 using namespace WebCore;
     39 
     40 static NSFont *defaultMenuFont()
     41 {
     42     static NSFont *defaultMenuFont = nil;
     43     if (!defaultMenuFont) {
     44         defaultMenuFont = [NSFont menuFontOfSize:0];
     45         CFRetain(defaultMenuFont);
     46     }
     47     return defaultMenuFont;
     48 }
     49 
     50 static Font& fontFromNSFont(NSFont *font)
     51 {
     52     static NSFont *currentFont;
     53     DEFINE_STATIC_LOCAL(Font, currentRenderer, ());
     54 
     55     if ([font isEqual:currentFont])
     56         return currentRenderer;
     57     if (currentFont)
     58         CFRelease(currentFont);
     59     currentFont = font;
     60     CFRetain(currentFont);
     61     FontPlatformData f(font, [font pointSize]);
     62     currentRenderer = Font(f, ![[NSGraphicsContext currentContext] isDrawingToScreen]);
     63     return currentRenderer;
     64 }
     65 
     66 @implementation WebStringTruncator
     67 
     68 + (void)initialize
     69 {
     70     InitWebCoreSystemInterface();
     71 }
     72 
     73 + (NSString *)centerTruncateString:(NSString *)string toWidth:(float)maxWidth
     74 {
     75     return StringTruncator::centerTruncate(string, maxWidth, fontFromNSFont(defaultMenuFont()));
     76 }
     77 
     78 + (NSString *)centerTruncateString:(NSString *)string toWidth:(float)maxWidth withFont:(NSFont *)font
     79 {
     80     return StringTruncator::centerTruncate(string, maxWidth, fontFromNSFont(font));
     81 }
     82 
     83 + (NSString *)rightTruncateString:(NSString *)string toWidth:(float)maxWidth withFont:(NSFont *)font
     84 {
     85     return StringTruncator::rightTruncate(string, maxWidth, fontFromNSFont(font));
     86 }
     87 
     88 + (float)widthOfString:(NSString *)string font:(NSFont *)font
     89 {
     90     return StringTruncator::width(string, fontFromNSFont(font));
     91 }
     92 
     93 @end
     94