Reorganize top-level view handling and implement -gui-managed window decorations.

git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/gui/trunk@19687 72102866-910b-0410-8b05-ffd578937521

Source/GSWindowDecorationView.m

@@ -0,0 +1,293 @@
+/** <title>GSWindowDecorationView</title>
+
+   Copyright (C) 2004 Free Software Foundation, Inc.
+
+   Author: Alexander Malmberg <alexander@malmberg.org>
+   Date: 2004-03-24
+
+   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; see the file COPYING.LIB.
+   If not, write to the Free Software Foundation,
+   59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+*/
+
+#include "GSWindowDecorationView.h"
+
+#include <Foundation/NSException.h>
+
+#include "AppKit/NSColor.h"
+#include "AppKit/NSWindow.h"
+#include "GNUstepGUI/GSDisplayServer.h"
+
+
+struct NSWindow_struct
+{
+  @defs(NSWindow)
+};
+
+
+/*
+Manage window decorations by using the backend functions. This only works
+on backends that can handle window decorations.
+*/
+@interface GSBackendWindowDecorationView : GSWindowDecorationView
+@end
+
+
+/*
+GSWindowDecorationView implementation.
+*/
+@implementation GSWindowDecorationView
+
++(id<GSWindowDecorator>) windowDecorator
+{
+  if ([GSCurrentServer() handlesWindowDecorations])
+    return [GSBackendWindowDecorationView self];
+  else
+    return [GSStandardWindowDecorationView self];
+}
+
+
++(id) newWindowDecorationViewWithFrame: (NSRect)frame
+				window: (NSWindow *)aWindow
+{
+  return [[self alloc] initWithFrame: frame
+			      window: aWindow];
+}
+
+
++(void) offsets: (float *)l : (float *)r : (float *)t : (float *)b
+   forStyleMask: (unsigned int)style
+{
+  [self subclassResponsibility: _cmd];
+}
+
++ (NSRect) contentRectForFrameRect: (NSRect)aRect
+			 styleMask: (unsigned int)aStyle
+{
+  float t, b, l, r;
+
+  [self offsets: &l : &r : &t : &b
+   forStyleMask: aStyle];
+  aRect.size.width -= l + r;
+  aRect.size.height -= t + b;
+  aRect.origin.x += l;
+  aRect.origin.y += b;
+  return aRect;
+}
+
++ (NSRect) frameRectForContentRect: (NSRect)aRect
+			 styleMask: (unsigned int)aStyle
+{
+  float t, b, l, r;
+
+  [self offsets: &l : &r : &t : &b
+   forStyleMask: aStyle];
+  aRect.size.width += l + r;
+  aRect.size.height += t + b;
+  aRect.origin.x -= l;
+  aRect.origin.y -= b;
+  return aRect;
+}
+
++ (float) minFrameWidthWithTitle: (NSString *)aTitle
+		       styleMask: (unsigned int)aStyle
+{
+  [self subclassResponsibility: _cmd];
+  return 0.0;
+}
+
+
+/*
+Internal helpers.
+
+Returns the internal window frame rect for a given (screen) frame.
+*/
++(NSRect) windowFrameRectForFrameRect: (NSRect)aRect
+			    styleMask: (unsigned int)aStyle
+{
+  aRect.origin = NSZeroPoint;
+  return aRect;
+}
+
+/*
+Returns the content rect for a given window frame.
+*/
++(NSRect) contentRectForWindowFrameRect: (NSRect)aRect
+			      styleMask: (unsigned int)aStyle
+{
+  return [self contentRectForFrameRect: aRect  styleMask: aStyle];
+}
+
+
+- initWithFrame: (NSRect)frame
+{
+  NSAssert(NO, @"Tried to create GSWindowDecorationView without a window!");
+  return nil;
+}
+
+- initWithFrame: (NSRect)frame
+	 window: (NSWindow *)w
+{
+  frame = [isa windowFrameRectForFrameRect: frame
+				 styleMask: [w styleMask]];
+
+  self = [super initWithFrame: frame];
+  if (!self)
+    return nil;
+    
+  window = w;
+  contentRect = frame;
+  contentRect =
+    [isa contentRectForWindowFrameRect: contentRect
+			     styleMask: [window styleMask]];
+
+  return self;
+}
+
+/*
+ * Special setFrame: implementation - a minimal autoresize mechanism
+ */
+- (void) setFrame: (NSRect)frameRect
+{
+  NSSize oldSize = _frame.size;
+  NSView *cv = [_window contentView];
+
+  frameRect = [isa windowFrameRectForFrameRect: frameRect
+				     styleMask: [window styleMask]];
+
+  _autoresizes_subviews = NO;
+  [super setFrame: frameRect];
+
+  contentRect = [isa contentRectForWindowFrameRect: frameRect
+					 styleMask: [window styleMask]];
+
+  // Safety Check.
+  [cv setAutoresizingMask: NSViewWidthSizable | NSViewHeightSizable];
+  [cv resizeWithOldSuperviewSize: oldSize];
+}
+
+- (void) setContentView: (NSView *)contentView
+{
+  NSSize oldSize;
+
+  [contentView setAutoresizingMask: NSViewWidthSizable | NSViewHeightSizable];
+  [self addSubview: contentView];
+
+  oldSize = [contentView frame].size;
+  oldSize.width += _frame.size.width - contentRect.size.width;
+  oldSize.height += _frame.size.height - contentRect.size.height;
+  [contentView resizeWithOldSuperviewSize: oldSize];
+  [contentView setFrameOrigin: NSMakePoint(contentRect.origin.x,
+					   contentRect.origin.y)];
+}
+
+-(void) setWindowNumber: (int)theWindowNumber
+{
+  windowNumber = theWindowNumber;
+  if (!windowNumber)
+    return;
+
+  [GSServerForWindow(window) titlewindow: [window title] : windowNumber];
+  [GSServerForWindow(window) setinputstate: inputState : windowNumber];
+  [GSServerForWindow(window) docedited: documentEdited : windowNumber];
+}
+
+-(void) setTitle: (NSString *)title
+{
+  if (windowNumber)
+    [GSServerForWindow(window) titlewindow: title : windowNumber];
+}
+-(void) setInputState: (int)state
+{
+  inputState = state;
+  if (windowNumber)
+    [GSServerForWindow(window) setinputstate: inputState : windowNumber];
+}
+-(void) setDocumentEdited: (BOOL)flag
+{
+  documentEdited = flag;
+  if (windowNumber)
+    [GSServerForWindow(window) docedited: documentEdited : windowNumber];
+}
+
+
+- (BOOL) isOpaque
+{
+  return YES;
+}
+
+- (void) drawRect: (NSRect)rect
+{
+  NSColor *c = [_window backgroundColor];
+
+  if (NSIntersectsRect(rect, contentRect))
+    {
+      [c set];
+      NSRectFill(contentRect);
+    }
+}
+
+
+
+- initWithCoder: (NSCoder*)aCoder
+{
+  NSAssert(NO, @"The top-level window view should never be encoded.");
+  return nil;
+}
+-(void) encodeWithCoder: (NSCoder*)aCoder
+{
+  NSAssert(NO, @"The top-level window view should never be encoded.");
+}
+
+@end
+
+
+
+@implementation GSBackendWindowDecorationView
+
++(void) offsets: (float *)l : (float *)r : (float *)t : (float *)b
+   forStyleMask: (unsigned int)style
+{
+  [GSCurrentServer() styleoffsets: l : r : t : b : style];
+}
++ (float) minFrameWidthWithTitle: (NSString *)aTitle
+		       styleMask: (unsigned int)aStyle
+{
+  /* TODO: we could at least guess... */
+  return 0.0;
+}
+
++(NSRect) windowFrameRectForFrameRect: (NSRect)aRect
+			    styleMask: (unsigned int)aStyle
+{
+  float l, r, t, b;
+  [self offsets: &l : &r : &t : &b forStyleMask: aStyle];
+  aRect.size.width -= l + r;
+  aRect.size.height -= t + b;
+  return aRect;
+}
+
+/*
+Returns the content rect for a given window frame.
+*/
++(NSRect) contentRectForWindowFrameRect: (NSRect)aRect
+			      styleMask: (unsigned int)aStyle
+{
+  return aRect;
+}
+
+@end
+