Basic implementation of NSTextAttachment and NSTextAttachmentCell

git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/gui/trunk@6805 72102866-910b-0410-8b05-ffd578937521
2025-05-29 23:50:37 +00:00 · 2000-06-26 19:53:27 +00:00 · 2000-06-26 19:53:27 +00:00 · f331085fa7
commit f331085fa7
parent 0b3cff5cc0
1 changed files with 220 additions and 0 deletions
--- a/Source/NSTextAttachment.m
+++ b/Source/NSTextAttachment.m
@ -0,0 +1,220 @@
+/*
+   NSTextAttachment.m
+
+   Classes to represent text attachments.
+   
+   NSTextAttachment is used to represent text attachments. When inline, 
+   text attachments appear as the value of the NSAttachmentAttributeName 
+   attached to the special character NSAttachmentCharacter.
+   
+   NSTextAttachment uses an object obeying the NSTextAttachmentCell 
+   protocol to get input from the user and to display an image.
+
+   NSTextAttachmentCell is a simple subclass of NSCell which provides 
+   the NSTextAttachment protocol.
+
+   Copyright (C) 2000 Free Software Foundation, Inc.
+
+   Author:  Fred Kiefer <fredkiefer@gmx.de>
+   Date: June 2000
+   
+   This file is part of the GNUstep GUI Library.
+
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public
+   License as published by the Free Software Foundation; either
+   version 2 of the License, or (at your option) any later version.
+   
+   This library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with this library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111 USA.
+*/
+
+#include <Foundation/Foundation.h>
+#include <AppKit/NSCell.h>
+#include <AppKit/NSFileWrapper.h>
+#include <AppKit/NSImage.h>
+#include <AppKit/NSTextContainer.h>
+#include <AppKit/NSTextAttachment.h>
+
+
+@implementation NSTextAttachmentCell
+
+- (void)drawWithFrame:(NSRect)cellFrame 
+	       inView:(NSView *)controlView 
+       characterIndex:(unsigned)charIndex
+{
+  [self drawWithFrame: cellFrame 
+	inView: controlView];
+}
+
+- (NSPoint)cellBaselineOffset
+{
+  return NSZeroPoint;
+}
+
+- (NSRect)cellFrameForTextContainer:(NSTextContainer *)textContainer 
+	       proposedLineFragment:(NSRect)lineFrag
+		      glyphPosition:(NSPoint)position 
+		     characterIndex:(unsigned)charIndex
+{
+  NSRect aRect;
+  
+  // FIXME: We ignore the proposedLineFragment
+  aRect.origin = position;
+  aRect.size = [self cellSize];
+  return aRect;
+}
+
+- (BOOL)wantsToTrackMouse
+{
+  return YES;
+}
+
+- (BOOL)trackMouse:(NSEvent *)theEvent 
+	    inRect:(NSRect)cellFrame 
+	    ofView:(NSView *)controlView 
+      untilMouseUp:(BOOL)flag
+{
+  // FIXME: This is not the correct behaviour
+  return [super trackMouse: theEvent 
+		inRect: cellFrame 
+		ofView: controlView 
+		untilMouseUp: flag];
+}
+
+- (BOOL)trackMouse:(NSEvent *)theEvent 
+	    inRect:(NSRect)cellFrame 
+	    ofView:(NSView *)controlView
+  atCharacterIndex:(unsigned)charIndex 
+      untilMouseUp:(BOOL)flag
+{
+  // FIXME: This is not the correct behaviour
+  return [self trackMouse: theEvent 
+	       inRect: cellFrame 
+	       ofView: controlView 
+	       untilMouseUp: flag];
+}
+
+- (void)setAttachment:(NSTextAttachment *)anObject
+{
+  NSFileWrapper *fileWrap = [anObject fileWrapper];
+
+  // Do not retain the attachment
+  _attachment = anObject;
+
+  if (fileWrap != nil)
+    {
+      NSImage *icon = nil;
+      NSString *fileName = [fileWrap filename];
+
+      if (fileName != nil)
+        {
+	  // Try to set the image to the file wrapper content
+	  icon = [[NSImage alloc] initByReferencingFile: fileName];
+        }
+      if (icon == nil)
+	icon = [fileWrap icon];
+
+      [self setImage: icon];
+    }
+}
+
+- (NSTextAttachment *)attachment
+{
+  return _attachment;
+}
+
+//FIXME: I had to add those methods to keep the compiler quite. 
+// This are already defined on the super class and should be taken from there.
+
+- (NSSize)cellSize
+{
+  return [super cellSize];
+}
+
+- (void)highlight:(BOOL)flag 
+	withFrame:(NSRect)cellFrame 
+	   inView:(NSView *)controlView
+{
+  [super highlight: flag 
+	 withFrame: cellFrame 
+	 inView: controlView];
+}
+
+- (void)drawWithFrame:(NSRect)cellFrame inView:(NSView *)controlView
+{
+  [super drawWithFrame: cellFrame inView: controlView];
+}
+
+@end
+
+
+@implementation NSTextAttachment
+
+- (id)init
+{
+  return [self initWithFileWrapper: nil];
+}
+
+- (void)dealloc
+{
+  DESTROY(_fileWrapper);
+  DESTROY(_cell);
+}
+
+- (id)initWithFileWrapper:(NSFileWrapper *)fileWrapper
+{
+  ASSIGN(_fileWrapper, fileWrapper);
+  _cell = [[NSTextAttachmentCell alloc ] init];
+  [_cell setAttachment: self];
+
+  return self;
+}
+
+- (void)setFileWrapper:(NSFileWrapper *)fileWrapper
+{
+  ASSIGN(_fileWrapper, fileWrapper);
+}
+
+- (NSFileWrapper *)fileWrapper
+{
+  return _fileWrapper;
+}
+
+- (id <NSTextAttachmentCell>)attachmentCell
+{
+  return _cell;
+}
+
+- (void)setAttachmentCell:(id <NSTextAttachmentCell>)cell
+{
+  ASSIGN(_cell, cell);
+  [_cell setAttachment: self];
+}
+
+/*
+ * NSCoding protocol
+ */
+- (void) encodeWithCoder: (NSCoder*)aCoder
+{
+  [aCoder encodeObject: _fileWrapper];
+  [aCoder encodeObject: _cell];
+}
+
+- (id) initWithCoder: (NSCoder*)aDecoder
+{
+  [aDecoder decodeValueOfObjCType: @encode(id) at: &_fileWrapper];
+  [aDecoder decodeValueOfObjCType: @encode(id) at: &_cell];
+
+  // Reconnect the cell, so the cell does not have to store the attachment
+  [_cell setAttachment: self];
+  return self;
+}
+
+@end