1 files changed, 137 insertions, 0 deletions
diff --git a/src/osx/PreviewController.m b/src/osx/PreviewController.m
new file mode 100644
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--- /dev/null
+++ b/src/osx/PreviewController.m
@@ -0,0 +1,137 @@
+//
+//  PreviewController.m
+//  TikZiT
+//  
+//  Copyright 2010 Aleks Kissinger. All rights reserved.
+//  
+//  
+//  This file is part of TikZiT.
+//  
+//  TikZiT is free software: you can redistribute it and/or modify
+//  it under the terms of the GNU General Public License as published by
+//  the Free Software Foundation, either version 3 of the License, or
+//  (at your option) any later version.
+//  
+//  TikZiT 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 General Public License for more details.
+//  
+//  You should have received a copy of the GNU General Public License
+//  along with TikZiT.  If not, see <http://www.gnu.org/licenses/>.
+//  
+
+#import "PreviewController.h"
+#import "AppDelegate.h"
+#import "PreambleController.h"
+#import <Quartz/Quartz.h>
+
+@implementation PreviewController
+
+static PreviewController *preview = nil;
+
+- (id)initWithWindowNibName:(NSString*)nib
+		 preambleController:(PreambleController*)pc
+					tempDir:(NSString*)dir {
+	[super initWithWindowNibName:nib];
+	tempDir = [dir copy];
+	typesetCount = 0;
+	preambleController = pc;
+	latexLock = [[NSLock alloc] init];
+	return self;
+}
+
+- (void)runLatex:(id)tikz {
+	// Only build one tex file at a time, so we don't get funky results.
+	[latexLock lock];
+	[progressIndicator startAnimation:self];
+	
+	int fnum = typesetCount++;
+	
+	NSString *tex = [NSString stringWithFormat:@"%@%@%@",
+					 [preambleController currentPreamble],
+					 tikz,
+					 [preambleController currentPostamble]];
+	
+	NSString *texFile = [NSString stringWithFormat:@"%@/tikzit_%d.tex", tempDir, fnum];
+	NSString *pdfFile = [NSString stringWithFormat:@"%@/tikzit_%d.pdf", tempDir, fnum];
+	
+	[tex writeToFile:texFile atomically:NO encoding:NSUTF8StringEncoding error:NULL];
+	
+	// We run pdflatex in a bash shell to have easy access to the setup from unix-land
+	NSTask *latexTask = [[NSTask alloc] init];
+	[latexTask setCurrentDirectoryPath:tempDir];
+	[latexTask setLaunchPath:@"/bin/bash"];
+	
+	// This assumes the user has $PATH set up to find pdflatex in either .profile
+	// or .bashrc. This should be improved to take other path setups into account
+	// and to be customisable.
+	NSString *latexCmd =
+	[NSString stringWithFormat:
+	 @"if [ -e ~/.profile ]; then source ~/.profile; fi\n"
+	 @"if [ -e ~/.bashrc ]; then source ~/.bashrc; fi\n"
+	 @"pdflatex -interaction=nonstopmode -halt-on-error '%@'\n",
+	 texFile];
+	
+	NSPipe *pout = [NSPipe pipe];
+	NSPipe *pin = [NSPipe pipe];
+	[latexTask setStandardOutput:pout];
+	[latexTask setStandardInput:pin];
+	
+	NSFileHandle *latexIn = [pin fileHandleForWriting];
+	NSFileHandle *latexOut = [pout fileHandleForReading];
+	
+	[latexTask launch];
+	[latexIn writeData:[latexCmd dataUsingEncoding:NSUTF8StringEncoding]];
+	[latexIn closeFile];
+	[latexTask waitUntilExit];
+	
+	NSData *data = [latexOut readDataToEndOfFile];
+	NSString *str = [[NSString alloc] initWithData:data
+										  encoding:NSUTF8StringEncoding];
+	
+	if ([latexTask terminationStatus] != 0) {
+		[errorTextView setHidden:YES];
+		errorText.string = [@"\nAN ERROR HAS OCCURRED, PDFLATEX SAID:\n\n" stringByAppendingString:str];
+		[errorTextView setHidden:NO];
+	} else {
+		errorText.string = @"";
+		[errorTextView setHidden:YES];
+		
+		data = [NSData dataWithContentsOfFile:pdfFile];
+		PDFDocument *doc = [[PDFDocument alloc] initWithData:data];
+		
+		// pad the PDF by a couple of pixels
+		if ([doc pageCount] >= 1) {
+			PDFPage *page = [doc pageAtIndex:0];
+			NSRect box = [page boundsForBox:kPDFDisplayBoxCropBox];
+			box.origin.x -= 2.0f;
+			box.origin.y -= 2.0f;
+			box.size.width += 4.0f;
+			box.size.height += 4.0f;
+			[page setBounds:box forBox:kPDFDisplayBoxCropBox];
+			[page setBounds:box forBox:kPDFDisplayBoxMediaBox];
+		}
+		
+		[pdfView setDocument:doc];
+	}
+	
+	[progressIndicator stopAnimation:self];
+	[latexLock unlock];
+}
+
+- (void)buildTikz:(NSString*)tikz {
+	// Build on a separate thread to keep the interface responsive.
+	[NSThread detachNewThreadSelector:@selector(runLatex:) toTarget:self withObject:tikz];
+}
+
++ (void)setDefaultPreviewController:(PreviewController*)pc {
+	preview = pc;
+}
+
++ (PreviewController*)defaultPreviewController {
+	return preview;
+}
+
+
+@end