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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/1999/REC-html401-19991224/loose.dtd">
<html>
<head>
<!-- BEGIN META TAG INFO -->
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<link rel="home" href="http://developer.apple.com/">
<link rel="find" href="http://developer.apple.com/search/">
<link rel="stylesheet" type="text/css" href="../../documentation/css/adcstyle.css" title="fonts">
<script language="JavaScript" src="../../documentation/js/adc.js" type="text/javascript"></script>
<!-- END META TAG INFO -->
<!-- BEGIN TITLE -->
<title>TextLinks - /NSTextViewWithLinks.m</title>
<!-- END TITLE -->
<script language="JavaScript">
function JumpToNewPage() {
window.location=document.scpopupmenu.gotop.value;
return true;
}
</script>
</head>
<!-- BEGIN BODY OPEN -->
<body>
<!--END BODY OPEN -->
<!-- START CENTER OPEN -->
<center>
<!-- END CENTER OPEN -->
<!-- BEGIN LOGO AND SEARCH -->
<!--#include virtual="/includes/adcnavbar"-->
<!-- END LOGO AND SEARCH -->
<!-- START BREADCRUMB -->
<div id="breadcrumb">
<table width="680" border="0" cellpadding="0" cellspacing="0">
<tr>
<td scope="row"><img width="340" height="10" src="images/1dot.gif" alt=""></td>
<td><img width="340" height="10" src="images/1dot.gif" alt=""></td>
</tr>
<tr valign="middle">
<td align="left" colspan="2">
<a href="http://developer.apple.com/">ADC Home</a> > <a href="../../referencelibrary/index.html">Reference Library</a> > <a href="../../samplecode/index.html">Sample Code</a> > <a href="../../samplecode/Cocoa/index.html">Cocoa</a> > <a href="../../samplecode/Cocoa/idxNetworking-date.html">Networking</a> > <A HREF="javascript:location.replace('index.html');">TextLinks</A> >
</td>
</tr>
<tr>
<td colspan="2" scope="row"><img width="680" height="35" src="images/1dot.gif" alt=""></td>
</tr>
</table>
</div>
<!-- END BREADCRUMB -->
<!-- START MAIN CONTENT -->
<!-- START TITLE GRAPHIC AND INTRO-->
<table width="680" border="0" cellpadding="0" cellspacing="0">
<tr align="left" valign="top">
<td><h1><div id="pagehead">TextLinks</div></h1></td>
</tr>
</table>
<!-- END TITLE GRAPHIC AND INTRO -->
<!-- START WIDE COLUMN -->
<table width="680" border="0" cellpadding="0" cellspacing="0">
<tr align="left" valign="top">
<td id="scdetails">
<h2>/NSTextViewWithLinks.m</h2>
<form name="scpopupmenu" onSubmit="return false;" method=post>
<p><strong>View Source Code:</strong>
<select name="gotop" onChange="JumpToNewPage();" style="width:340px"><option selected value="ingnore">Select File</option>
<option value="listing1.html">/Controller.h</option>
<option value="listing2.html">/Controller.m</option>
<option value="listing3.html">/main.m</option>
<option value="listing4.html">/NSTextViewWithLinks.h</option>
<option value="listing5.html">/NSTextViewWithLinks.m</option></select>
</p>
</form>
<p><strong><a href="TextLinks.zip">Download Sample</a></strong> (“TextLinks.zip”, 84.8K)<BR>
<strong><a href="TextLinks.dmg">Download Sample</a></strong> (“TextLinks.dmg”, 145.0K)</p>
<!--
<p><strong><a href="#">Download Sample</a></strong> (“filename.sit”, 500K)</p>
-->
</td>
</tr>
<tr>
<td scope="row"><img width="680" height="10" src="images/1dot.gif" alt=""><br>
<img height="1" width="680" src="images/1dot_919699.gif" alt=""><br>
<img width="680" height="20" src="images/1dot.gif" alt=""></td>
</tr>
<tr>
<td scope="row">
<!--googleon: index -->
<pre class="sourcecodebox">// NSTextViewWithLinks.m
// TextLinks
// Copyright (c) 2003 Apple Computer, Inc. All rights reserved.
// See legal notice at end of file.
// This application demonstrates how to programmatically create links in text,
// and optionally handle clicks in those links. See README.rtf for more information.
#import "NSTextViewWithLinks.h"
// Informal protocol for extending NSTextView's delegate
@interface NSObject (NSTextViewWithLinks_Delegate)
- (NSCursor *) cursorForLink: (NSObject *) linkObject
atIndex: (unsigned) charIndex
ofTextView: (NSTextView *) aTextView;
@end
@implementation NSTextViewWithLinks
#pragma mark PRIVATE CLASS METHODS
+ (NSCursor *) fingerCursor; // really should be in a category on NSCursor
{
static NSCursor *fingerCursor = nil;
if (fingerCursor == nil)
{
fingerCursor = [[NSCursor alloc] initWithImage: [NSImage imageNamed: @"fingerCursor"]
hotSpot: NSMakePoint (0, 0)];
}
return fingerCursor;
}
#pragma mark PUBLIC CLASS METHODS -- NSObject OVERRIDES
// Make all NSTextView instances into instances of this class, even if we didn't create them.
// (We could instead selectively make some instances in nib files belong to this class,
// but then it's hard to enter the initial text using Interface Builder.)
+ (void) load
{
[self poseAsClass: [self superclass]];
}
#pragma mark PRIVATE INSTANCE METHODS
- (NSCursor *) cursorForLink: (NSObject *) linkObject
atIndex: (unsigned) charIndex
{
NSCursor *result = nil;
// If the delegate implements the method, consult it.
if ([[self delegate] respondsToSelector: @selector(cursorForLink:atIndex:ofTextView:)])
result = [[self delegate] cursorForLink: linkObject atIndex: charIndex ofTextView: self];
// If the delegate didn't implement it, or it did but returned nil, substitute a guess.
if (result == nil)
result = [[self class] fingerCursor];
return result;
}
#pragma mark PUBLIC INSTANCE METHODS -- NSView OVERRIDES
- (void) resetCursorRects
{
NSAttributedString *attrString;
NSPoint containerOrigin;
NSRect visRect;
NSRange visibleGlyphRange, visibleCharRange, attrsRange;
// Get the attributed text inside us
attrString = [self textStorage];
// Figure what part of us is visible (we're typically inside a scrollview)
containerOrigin = [self textContainerOrigin];
visRect = NSOffsetRect ([self visibleRect], -containerOrigin.x, -containerOrigin.y);
// Figure the range of characters which is visible
visibleGlyphRange = [[self layoutManager] glyphRangeForBoundingRect:visRect inTextContainer:[self textContainer]];
visibleCharRange = [[self layoutManager] characterRangeForGlyphRange:visibleGlyphRange actualGlyphRange:NULL];
// Prime for the loop
attrsRange = NSMakeRange (visibleCharRange.location, 0);
// Loop until we reach the end of the visible range of characters
while (NSMaxRange(attrsRange) < NSMaxRange(visibleCharRange)) // find all visible URLs and set up cursor rects
{
NSString *linkObject;
// Find the next link inside the range
linkObject = [attrString attribute: NSLinkAttributeName
atIndex: NSMaxRange(attrsRange)
effectiveRange: &attrsRange];
if (linkObject != nil)
{
NSCursor *cursor;
NSRectArray rects;
unsigned int rectCount, rectIndex;
NSRect oneRect;
// Figure what cursor to show over this link.
cursor = [self cursorForLink: linkObject atIndex: attrsRange.location];
// Find the rectangles where this range falls. (We could use -boundingRectForGlyphRange:...,
// but that gives a single rectangle, which might be overly large when a link runs
// through more than one line.)
rects = [[self layoutManager] rectArrayForCharacterRange: attrsRange
withinSelectedCharacterRange: NSMakeRange (NSNotFound, 0)
inTextContainer: [self textContainer]
rectCount: &rectCount];
// For each rectangle, find its visible portion and ask for the cursor to appear
// when they're over that rectangle.
for (rectIndex = 0; rectIndex < rectCount; rectIndex++)
{
oneRect = NSIntersectionRect (rects[rectIndex], [self visibleRect]);
[self addCursorRect: oneRect cursor: cursor];
}
}
}
}
@end
/*
IMPORTANT: This Apple software is supplied to you by Apple Computer, Inc. ("Apple") in
consideration of your agreement to the following terms, and your use, installation,
modification or redistribution of this Apple software constitutes acceptance of these
terms. If you do not agree with these terms, please do not use, install, modify or
redistribute this Apple software.
In consideration of your agreement to abide by the following terms, and subject to these
terms, Apple grants you a personal, non-exclusive license, under Apple's copyrights in
this original Apple software (the "Apple Software"), to use, reproduce, modify and
redistribute the Apple Software, with or without modifications, in source and/or binary
forms; provided that if you redistribute the Apple Software in its entirety and without
modifications, you must retain this notice and the following text and disclaimers in all
such redistributions of the Apple Software. Neither the name, trademarks, service marks
or logos of Apple Computer, Inc. may be used to endorse or promote products derived from
the Apple Software without specific prior written permission from Apple. Except as expressly
stated in this notice, no other rights or licenses, express or implied, are granted by Apple
herein, including but not limited to any patent rights that may be infringed by your
derivative works or by other works in which the Apple Software may be incorporated.
The Apple Software is provided by Apple on an "AS IS" basis. APPLE MAKES NO WARRANTIES,
EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED WARRANTIES OF NON-INFRINGEMENT,
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS
USE AND OPERATION ALONE OR IN COMBINATION WITH YOUR PRODUCTS.
IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) ARISING IN ANY WAY OUT OF THE USE,
REPRODUCTION, MODIFICATION AND/OR DISTRIBUTION OF THE APPLE SOFTWARE, HOWEVER CAUSED AND
WHETHER UNDER THEORY OF CONTRACT, TORT (INCLUDING NEGLIGENCE), STRICT LIABILITY OR
OTHERWISE, EVEN IF APPLE HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
</pre>
<!--googleoff: index -->
</td>
</tr>
</table>
<!-- END WIDE COLUMN -->
<!-- END MAIN CONTENT -->
<table width="680" border="0" cellpadding="0" cellspacing="0">
<tr>
<td><div style="width: 100%; height: 1px; background-color: #919699; margin-top: 5px; margin-bottom: 15px"></div></td>
</tr>
<tr>
<td align="center"><br/>
<table border="0" cellpadding="0" cellspacing="0" class="graybox">
<tr>
<th>Did this document help you?</th>
</tr>
<tr>
<td>
<div style="margin-bottom: 8px"><a href="http://developer.apple.com/feedback/?v=1&url=/samplecode/TextLinks/listing5.html%3Fid%3DDTS10000409-1.0&media=dvd" target=_new>Yes</a>: Tell us what works for you.</div>
<div style="margin-bottom: 8px"><a href="http://developer.apple.com/feedback/?v=2&url=/samplecode/TextLinks/listing5.html%3Fid%3DDTS10000409-1.0&media=dvd" target=_new>It’s good, but:</a> Report typos, inaccuracies, and so forth.</div>
<div><a href="http://developer.apple.com/feedback/?v=3&url=/samplecode/TextLinks/listing5.html%3Fid%3DDTS10000409-1.0&media=dvd" target=_new>It wasn’t helpful</a>: Tell us what would have helped.</div>
</td>
</tr>
</table>
</td>
</tr>
</table>
<!-- START BOTTOM APPLE NAVIGATION -->
<!--#include virtual="/includes/footer"-->
<!-- END BOTTOM APPLE NAVIGATION -->
<!-- START CENTER CLOSE -->
</center>
<!-- END CENTER CLOSE -->
</body>
</html>