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ImageProvider.m

#include "ImageProvider.h"

@implementation ImageProvider

+ (NSImage*) leftPartOfImage: (NSImage*) base
{
      NSSize size = NSMakeSize ([base size].width/2.0, [base size].height);
      NSImage* ret = [[[NSImage alloc] initWithSize: size] autorelease];
      
      [ret lockFocus];
      [base compositeToPoint: NSMakePoint (0,0) operation: NSCompositeSourceOver];
      [ret unlockFocus];

      return ret;
}

+ (NSImage*) rightPartOfImage: (NSImage*) base
{
      NSSize size = NSMakeSize ([base size].width/2.0, [base size].height);
      NSImage* ret = [[[NSImage alloc] initWithSize: size] autorelease];
      
      [ret lockFocus];
      [base compositeToPoint: NSMakePoint (-[base size].width/2.0,0) operation: NSCompositeSourceOver];
      [ret unlockFocus];

      return ret;
}

+ (NSImage*) TabsSelectedLeft
{
      NSImage* ret = nil;
      NSString* key = @"TabsSelectedLeft"; 
      ret = [[CLCache cache] imageNamed: key];
      if (ret == nil)
      {
            ret = [NSImage imageNamed: @"Tabs/Tabs-junction-selected-left.tiff"];
            if (ret == nil)
            {
                  ret = [ImageProvider leftPartOfImage: [NSImage imageNamed: @"Tabs/Tabs-selected-caps.tiff"]];
            }
            [[CLCache cache] setImage: ret named: key];
      }
      return ret;
}

+ (NSImage*) TabsSelectedRight
{
      NSImage* ret = nil;
      NSString* key = @"TabsSelectedRight";
      ret = [[CLCache cache] imageNamed: key];
      if (ret == nil)
      {
            ret = [NSImage imageNamed: @"Tabs/Tabs-junction-selected-right.tiff"];
            if (ret == nil)
            {
                  ret = [ImageProvider rightPartOfImage: [NSImage imageNamed: @"Tabs/Tabs-selected-caps.tiff"]];
            }
            [[CLCache cache] setImage: ret named: key];
      }
      return ret;
}

+ (NSImage*) TabsUnselectedLeft
{
      NSImage* ret = nil;
      NSString* key = @"TabsUnselectedLeft";
      ret = [[CLCache cache] imageNamed: key];
      if (ret == nil)
      {
            ret = [NSImage imageNamed: @"Tabs/Tabs-junction-unselected-left.tiff"];
            if (ret == nil)
            {
                  ret = [ImageProvider leftPartOfImage: [NSImage imageNamed: @"Tabs/Tabs-unselected-caps.tiff"]];
            }
            [[CLCache cache] setImage: ret named: key];
      }
      return ret;
}

+ (NSImage*) TabsUnselectedRight
{
      NSImage* ret = nil;
      NSString* key = @"TabsUnselectedRight";
      ret = [[CLCache cache] imageNamed: key];
      if (ret == nil)
      {
            ret = [NSImage imageNamed: @"Tabs/Tabs-junction-unselected-right.tiff"];
            if (ret == nil)
            {
                  ret = [ImageProvider rightPartOfImage: [NSImage imageNamed: @"Tabs/Tabs-unselected-caps.tiff"]];
            }
            [[CLCache cache] setImage: ret named: key];
      }
      return ret;
}

+ (NSImage*) TabsUnselectedJunction
{
      NSString* key = @"TabsUnselectedJunction";
      NSImage* ret = [[CLCache cache] imageNamed: key];
      if (ret == nil)
      {
            NSImage* left = [ImageProvider TabsUnselectedRight];
            NSImage* right = [ImageProvider TabsUnselectedLeft];
            NSSize size = NSMakeSize ([left size].width+[right size].width,[left size].height);
            ret = [[[NSImage alloc] initWithSize: size] autorelease];

            [ret lockFocus];
                  [left compositeToPoint: NSMakePoint (0,0) 
                        operation: NSCompositeSourceOver];
                  [right compositeToPoint: NSMakePoint ([left size].width,0) 
                        operation: NSCompositeSourceOver];
            [ret unlockFocus];
            [[CLCache cache] setImage: ret named: key];
      }
      return ret;
}

+ (NSImage*) TabsUnselectedToSelectedJunction
{
      NSString* key = @"TabsUnselectedToSelectedJunction";
      NSImage* ret = [[CLCache cache] imageNamed: key];
      if (ret == nil)
      {
            ret = [NSImage imageNamed: @"Tabs/Tabs-junction-unselected-selected.tiff"];
            if (ret == nil)
            {
                  NSImage* left = [ImageProvider TabsUnselectedRight];
                  NSImage* right = [ImageProvider TabsSelectedLeft];
                  NSSize size = NSMakeSize ([left size].width+[right size].width,[left size].height);
                  ret = [[[NSImage alloc] initWithSize: size] autorelease];

                  [ret lockFocus];
                        [left compositeToPoint: NSMakePoint (0,0) 
                              operation: NSCompositeSourceOver];
                        [right compositeToPoint: NSMakePoint ([left size].width,0) 
                              operation: NSCompositeSourceOver];
                  [ret unlockFocus];
            }
            [[CLCache cache] setImage: ret named: key];
      }
      return ret;
}

+ (NSImage*) TabsSelectedToUnselectedJunction
{
      NSString* key = @"TabsSelectedToUnselectedJunction";
      NSImage* ret = [[CLCache cache] imageNamed: key];
      if (ret == nil)
      {
            ret = [NSImage imageNamed: @"Tabs/Tabs-junction-selected-unselected.tiff"];
            if (ret == nil)
            {
                  NSImage* left = [ImageProvider TabsSelectedRight];
                  NSImage* right = [ImageProvider TabsUnselectedLeft];
                  NSSize size = NSMakeSize ([left size].width+[right size].width,[left size].height);
                  ret = [[[NSImage alloc] initWithSize: size] autorelease];

                  [ret lockFocus];
                        [left compositeToPoint: NSMakePoint (0,0) 
                              operation: NSCompositeSourceOver];
                        [right compositeToPoint: NSMakePoint ([left size].width,0) 
                              operation: NSCompositeSourceOver];
                  [ret unlockFocus];
            }
            [[CLCache cache] setImage: ret named: key];
      }
      return ret;
}

@end

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