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// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#import "chrome/browser/ui/cocoa/hyperlink_text_view.h"
#include "base/memory/scoped_nsobject.h"
// The baseline shift for text in the NSTextView.
const float kTextBaselineShift = -1.0;
@interface HyperlinkTextView(Private)
// Initialize the NSTextView properties for this subclass.
- (void)configureTextView;
// Change the current IBeamCursor to an arrowCursor.
- (void)fixupCursor;
@end
@implementation HyperlinkTextView
- (id)initWithCoder:(NSCoder*)decoder {
if ((self = [super initWithCoder:decoder]))
[self configureTextView];
return self;
}
- (id)initWithFrame:(NSRect)frameRect {
if ((self = [super initWithFrame:frameRect]))
[self configureTextView];
return self;
}
// Never draw the insertion point (otherwise, it shows up without any user
// action if full keyboard accessibility is enabled).
- (BOOL)shouldDrawInsertionPoint {
return NO;
}
- (NSRange)selectionRangeForProposedRange:(NSRange)proposedSelRange
granularity:(NSSelectionGranularity)granularity {
// Do not allow selections.
return NSMakeRange(0, 0);
}
// Convince NSTextView to not show an I-Beam cursor when the cursor is over the
// text view but not over actual text.
//
// http://www.mail-archive.com/cocoa-dev@lists.apple.com/msg10791.html
// "NSTextView sets the cursor over itself dynamically, based on considerations
// including the text under the cursor. It does so in -mouseEntered:,
// -mouseMoved:, and -cursorUpdate:, so those would be points to consider
// overriding."
- (void)mouseMoved:(NSEvent*)e {
[super mouseMoved:e];
[self fixupCursor];
}
- (void)mouseEntered:(NSEvent*)e {
[super mouseEntered:e];
[self fixupCursor];
}
- (void)cursorUpdate:(NSEvent*)e {
[super cursorUpdate:e];
[self fixupCursor];
}
- (void)configureTextView {
[self setEditable:NO];
[self setDrawsBackground:NO];
[self setHorizontallyResizable:NO];
[self setVerticallyResizable:NO];
}
- (void)fixupCursor {
if ([[NSCursor currentCursor] isEqual:[NSCursor IBeamCursor]])
[[NSCursor arrowCursor] set];
}
- (void)setMessageAndLink:(NSString*)message
withLink:(NSString*)link
atOffset:(NSUInteger)linkOffset
font:(NSFont*)font
messageColor:(NSColor*)messageColor
linkColor:(NSColor*)linkColor {
// Create an attributes dictionary for the message and link.
NSMutableDictionary* attributes = [NSMutableDictionary dictionary];
[attributes setObject:messageColor
forKey:NSForegroundColorAttributeName];
[attributes setObject:[NSCursor arrowCursor]
forKey:NSCursorAttributeName];
[attributes setObject:font
forKey:NSFontAttributeName];
[attributes setObject:[NSNumber numberWithFloat:kTextBaselineShift]
forKey:NSBaselineOffsetAttributeName];
// Create the attributed string for the message.
scoped_nsobject<NSMutableAttributedString> attributedMessage(
[[NSMutableAttributedString alloc] initWithString:message
attributes:attributes]);
if ([link length] != 0) {
// Add additional attributes to style the link text appropriately as
// well as linkify it.
[attributes setObject:linkColor
forKey:NSForegroundColorAttributeName];
[attributes setObject:[NSNumber numberWithBool:YES]
forKey:NSUnderlineStyleAttributeName];
[attributes setObject:[NSCursor pointingHandCursor]
forKey:NSCursorAttributeName];
[attributes setObject:[NSNumber numberWithInt:NSSingleUnderlineStyle]
forKey:NSUnderlineStyleAttributeName];
[attributes setObject:[NSString string] // dummy value
forKey:NSLinkAttributeName];
// Insert the link into the message at the appropriate offset.
scoped_nsobject<NSAttributedString> attributedLink(
[[NSAttributedString alloc] initWithString:link
attributes:attributes]);
[attributedMessage.get() insertAttributedString:attributedLink.get()
atIndex:linkOffset];
// Ensure the TextView doesn't override the link style.
[self setLinkTextAttributes:attributes];
}
// Update the text view with the new text.
[[self textStorage] setAttributedString:attributedMessage];
}
@end
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