Added custom DocumentController to manipulate open panel

MacPass/MPDocumentController.h

@@ -0,0 +1,15 @@
+//
+//  MPDocumentController.h
+//  MacPass
+//
+//  Created by Michael Starke on 31.10.14.
+//  Copyright (c) 2014 HicknHack Software GmbH. All rights reserved.
+//
+
+#import <Cocoa/Cocoa.h>
+
+@interface MPDocumentController : NSDocumentController <NSOpenSavePanelDelegate>
+
+- (IBAction)toggleAllowAllFilesButton:(id)sender;
+
+@end

MacPass/MPDocumentController.m

@@ -0,0 +1,57 @@
+//
+//  MPDocumentController.m
+//  MacPass
+//
+//  Created by Michael Starke on 31.10.14.
+//  Copyright (c) 2014 HicknHack Software GmbH. All rights reserved.
+//
+
+#import "MPDocumentController.h"
+
+#import "HNHCommon.h"
+
+@interface MPDocumentController ()
+
+@property (strong) IBOutlet NSView *accessoryView;
+@property (weak) NSOpenPanel *openPanel;
+@property (assign) BOOL allowAllFiles;
+
+@end
+
+@implementation MPDocumentController
+
+- (instancetype)init {
+  self = [super init];
+  if(self) {
+    _allowAllFiles = NO;
+  }
+  return self;
+}
+
+- (void)beginOpenPanel:(NSOpenPanel *)openPanel forTypes:(NSArray *)inTypes completionHandler:(void (^)(NSInteger))completionHandler {
+  self.openPanel = openPanel;
+  if(!self.accessoryView) {
+    NSBundle *myBundle = [NSBundle bundleForClass:[self class]];
+    NSArray *topLevelObjects;
+    [myBundle loadNibNamed:@"OpenPanelAccessoryView" owner:self topLevelObjects:&topLevelObjects];
+  }
+  self.openPanel.accessoryView = self.accessoryView;
+  //self.openPanel.delegate = self;
+  [super beginOpenPanel:openPanel forTypes:inTypes completionHandler:completionHandler];
+}
+
+- (IBAction)toggleAllowAllFilesButton:(id)sender {
+  NSButton *button = (NSButton *)sender;
+  self.openPanel.allowsOtherFileTypes = HNHBoolForState(button.state);
+  self.allowAllFiles = HNHBoolForState(button.state);
+}
+
+#pragma mark NSOpenSavePanelDelegate
+- (BOOL)panel:(id)sender shouldEnableURL:(NSURL *)url {
+  if(self.allowAllFiles) {
+    return YES;
+  }
+  return NO;
+}
+
+@end

MacPass/OpenPanelAccessoryView.xib

@@ -0,0 +1,40 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<document type="com.apple.InterfaceBuilder3.Cocoa.XIB" version="3.0" toolsVersion="6250" systemVersion="14A389" targetRuntime="MacOSX.Cocoa" propertyAccessControl="none" useAutolayout="YES" customObjectInstantitationMethod="direct">
+    <dependencies>
+        <deployment identifier="macosx"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.CocoaPlugin" version="6250"/>
+    </dependencies>
+    <objects>
+        <customObject id="-2" userLabel="File's Owner" customClass="MPDocumentController">
+            <connections>
+                <outlet property="accessoryView" destination="c22-O7-iKe" id="WVB-Jm-Rfh"/>
+            </connections>
+        </customObject>
+        <customObject id="-1" userLabel="First Responder" customClass="FirstResponder"/>
+        <customObject id="-3" userLabel="Application" customClass="NSObject"/>
+        <customView id="c22-O7-iKe">
+            <rect key="frame" x="0.0" y="0.0" width="398" height="54"/>
+            <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMinY="YES"/>
+            <subviews>
+                <button translatesAutoresizingMaskIntoConstraints="NO" id="I5Q-M2-Ha7">
+                    <rect key="frame" x="149" y="18" width="102" height="18"/>
+                    <buttonCell key="cell" type="check" title="Allow all files" bezelStyle="regularSquare" imagePosition="left" inset="2" id="tvV-1s-Be3">
+                        <behavior key="behavior" changeContents="YES" doesNotDimImage="YES" lightByContents="YES"/>
+                        <font key="font" metaFont="system"/>
+                    </buttonCell>
+                    <connections>
+                        <action selector="toggleAllowAllFilesButton:" target="-2" id="V8B-PV-RQJ"/>
+                    </connections>
+                </button>
+            </subviews>
+            <constraints>
+                <constraint firstAttribute="bottom" secondItem="I5Q-M2-Ha7" secondAttribute="bottom" constant="20" symbolic="YES" id="1Jj-lS-aRK"/>
+                <constraint firstItem="I5Q-M2-Ha7" firstAttribute="leading" relation="greaterThanOrEqual" secondItem="c22-O7-iKe" secondAttribute="leading" constant="20" symbolic="YES" id="9S1-Io-6xU"/>
+                <constraint firstItem="I5Q-M2-Ha7" firstAttribute="top" secondItem="c22-O7-iKe" secondAttribute="top" constant="20" symbolic="YES" id="9kk-7T-IXe"/>
+                <constraint firstAttribute="centerX" secondItem="I5Q-M2-Ha7" secondAttribute="centerX" constant="-0.5" id="Ob5-Dl-HCy"/>
+                <constraint firstAttribute="trailing" relation="greaterThanOrEqual" secondItem="I5Q-M2-Ha7" secondAttribute="trailing" constant="20" symbolic="YES" id="wmQ-mj-8Pr"/>
+            </constraints>
+            <point key="canvasLocation" x="412" y="319"/>
+        </customView>
+    </objects>
+</document>