Thumbnail preview

QLOPML.xcodeproj/project.pbxproj

@@ -8,18 +8,26 @@
 
 /* Begin PBXBuildFile section */
 		540A649C22EE78B200470937 /* GenerateThumbnailForURL.c in Sources */ = {isa = PBXBuildFile; fileRef = 540A649B22EE78B200470937 /* GenerateThumbnailForURL.c */; };
-		540A649E22EE78B200470937 /* GeneratePreviewForURL.m in Sources */ = {isa = PBXBuildFile; fileRef = 540A649D22EE78B200470937 /* GeneratePreviewForURL.m */; };
+		540A649E22EE78B200470937 /* GeneratePreviewForURL.c in Sources */ = {isa = PBXBuildFile; fileRef = 540A649D22EE78B200470937 /* GeneratePreviewForURL.c */; };
 		540A64A022EE78B200470937 /* main.c in Sources */ = {isa = PBXBuildFile; fileRef = 540A649F22EE78B200470937 /* main.c */; };
 		541EF8B322EEFBEA00C415AA /* style.css in Resources */ = {isa = PBXBuildFile; fileRef = 541EF8B122EEFB2300C415AA /* style.css */; };
+		54A75F6023D1269200754813 /* style-thumb.css in Resources */ = {isa = PBXBuildFile; fileRef = 54A75F5F23D1269100754813 /* style-thumb.css */; };
+		54BFFC1123D09E7300012FBB /* opml-lib.h in Headers */ = {isa = PBXBuildFile; fileRef = 54BFFC0F23D09E7300012FBB /* opml-lib.h */; };
+		54BFFC1223D09E7300012FBB /* opml-lib.m in Sources */ = {isa = PBXBuildFile; fileRef = 54BFFC1023D09E7300012FBB /* opml-lib.m */; };
 /* End PBXBuildFile section */
 
 /* Begin PBXFileReference section */
 		540A649822EE78B200470937 /* QLOPML.qlgenerator */ = {isa = PBXFileReference; explicitFileType = wrapper.cfbundle; includeInIndex = 0; path = QLOPML.qlgenerator; sourceTree = BUILT_PRODUCTS_DIR; };
 		540A649B22EE78B200470937 /* GenerateThumbnailForURL.c */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.c; path = GenerateThumbnailForURL.c; sourceTree = "<group>"; };
-		540A649D22EE78B200470937 /* GeneratePreviewForURL.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = GeneratePreviewForURL.m; sourceTree = "<group>"; };
+		540A649D22EE78B200470937 /* GeneratePreviewForURL.c */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.c; path = GeneratePreviewForURL.c; sourceTree = "<group>"; };
 		540A649F22EE78B200470937 /* main.c */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.c; path = main.c; sourceTree = "<group>"; };
 		540A64A122EE78B200470937 /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
 		541EF8B122EEFB2300C415AA /* style.css */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.css; path = style.css; sourceTree = "<group>"; };
+		54A75F5F23D1269100754813 /* style-thumb.css */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.css; path = "style-thumb.css"; sourceTree = "<group>"; };
+		54BFFC0423D0988A00012FBB /* sample.opml */ = {isa = PBXFileReference; lastKnownFileType = text.xml; path = sample.opml; sourceTree = SOURCE_ROOT; };
+		54BFFC0F23D09E7300012FBB /* opml-lib.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = "opml-lib.h"; sourceTree = "<group>"; };
+		54BFFC1023D09E7300012FBB /* opml-lib.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = "opml-lib.m"; sourceTree = "<group>"; };
+		54FB05D22305C8F400A088AD /* QLOPML.entitlements */ = {isa = PBXFileReference; lastKnownFileType = text.plist.entitlements; path = QLOPML.entitlements; sourceTree = "<group>"; };
 /* End PBXFileReference section */
 
 /* Begin PBXFrameworksBuildPhase section */
@@ -52,11 +60,16 @@
 		540A649A22EE78B200470937 /* QLOPML */ = {
 			isa = PBXGroup;
 			children = (
+				54FB05D22305C8F400A088AD /* QLOPML.entitlements */,
+				54BFFC0F23D09E7300012FBB /* opml-lib.h */,
+				54BFFC1023D09E7300012FBB /* opml-lib.m */,
 				540A649B22EE78B200470937 /* GenerateThumbnailForURL.c */,
-				540A649D22EE78B200470937 /* GeneratePreviewForURL.m */,
+				540A649D22EE78B200470937 /* GeneratePreviewForURL.c */,
 				540A649F22EE78B200470937 /* main.c */,
 				540A64A122EE78B200470937 /* Info.plist */,
 				541EF8B122EEFB2300C415AA /* style.css */,
+				54A75F5F23D1269100754813 /* style-thumb.css */,
+				54BFFC0423D0988A00012FBB /* sample.opml */,
 			);
 			path = QLOPML;
 			sourceTree = "<group>";
@@ -68,6 +81,7 @@
 			isa = PBXHeadersBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
+				54BFFC1123D09E7300012FBB /* opml-lib.h in Headers */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
@@ -103,6 +117,14 @@
 				TargetAttributes = {
 					540A649722EE78B200470937 = {
 						CreatedOnToolsVersion = 10.0;
+						SystemCapabilities = {
+							com.apple.HardenedRuntime = {
+								enabled = 1;
+							};
+							com.apple.Sandbox = {
+								enabled = 1;
+							};
+						};
 					};
 				};
 			};
@@ -128,6 +150,7 @@
 			isa = PBXResourcesBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
+				54A75F6023D1269200754813 /* style-thumb.css in Resources */,
 				541EF8B322EEFBEA00C415AA /* style.css in Resources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
@@ -140,7 +163,8 @@
 			buildActionMask = 2147483647;
 			files = (
 				540A649C22EE78B200470937 /* GenerateThumbnailForURL.c in Sources */,
-				540A649E22EE78B200470937 /* GeneratePreviewForURL.m in Sources */,
+				54BFFC1223D09E7300012FBB /* opml-lib.m in Sources */,
+				540A649E22EE78B200470937 /* GeneratePreviewForURL.c in Sources */,
 				540A64A022EE78B200470937 /* main.c in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
@@ -180,9 +204,13 @@
 				CLANG_WARN_UNGUARDED_AVAILABILITY = YES_AGGRESSIVE;
 				CLANG_WARN_UNREACHABLE_CODE = YES;
 				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
-				CODE_SIGN_IDENTITY = "-";
+				CODE_SIGN_ENTITLEMENTS = QLOPML/QLOPML.entitlements;
+				CODE_SIGN_IDENTITY = "Mac Developer";
+				CODE_SIGN_STYLE = Automatic;
 				COPY_PHASE_STRIP = NO;
 				DEBUG_INFORMATION_FORMAT = dwarf;
+				DEVELOPMENT_TEAM = UY657LKNHJ;
+				ENABLE_HARDENED_RUNTIME = YES;
 				ENABLE_STRICT_OBJC_MSGSEND = YES;
 				ENABLE_TESTABILITY = YES;
 				GCC_C_LANGUAGE_STANDARD = gnu11;
@@ -204,7 +232,6 @@
 				MTL_FAST_MATH = YES;
 				ONLY_ACTIVE_ARCH = YES;
 				SDKROOT = macosx;
-				SKIP_INSTALL = YES;
 			};
 			name = Debug;
 		};
@@ -240,9 +267,13 @@
 				CLANG_WARN_UNGUARDED_AVAILABILITY = YES_AGGRESSIVE;
 				CLANG_WARN_UNREACHABLE_CODE = YES;
 				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
-				CODE_SIGN_IDENTITY = "-";
+				CODE_SIGN_ENTITLEMENTS = QLOPML/QLOPML.entitlements;
+				CODE_SIGN_IDENTITY = "Mac Developer";
+				CODE_SIGN_STYLE = Automatic;
 				COPY_PHASE_STRIP = NO;
 				DEBUG_INFORMATION_FORMAT = "dwarf-with-dsym";
+				DEVELOPMENT_TEAM = UY657LKNHJ;
+				ENABLE_HARDENED_RUNTIME = YES;
 				ENABLE_NS_ASSERTIONS = NO;
 				ENABLE_STRICT_OBJC_MSGSEND = YES;
 				GCC_C_LANGUAGE_STANDARD = gnu11;
@@ -257,21 +288,15 @@
 				MTL_ENABLE_DEBUG_INFO = NO;
 				MTL_FAST_MATH = YES;
 				SDKROOT = macosx;
-				SKIP_INSTALL = YES;
 			};
 			name = Release;
 		};
 		540A64A522EE78B200470937 /* Debug */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
-				CODE_SIGN_STYLE = Manual;
-				COMBINE_HIDPI_IMAGES = YES;
-				DEVELOPMENT_TEAM = "";
 				INFOPLIST_FILE = QLOPML/Info.plist;
-				INSTALL_PATH = /Library/QuickLook;
 				PRODUCT_BUNDLE_IDENTIFIER = de.relikd.QLOPML;
 				PRODUCT_NAME = "$(TARGET_NAME)";
-				PROVISIONING_PROFILE_SPECIFIER = "";
 				WRAPPER_EXTENSION = qlgenerator;
 			};
 			name = Debug;
@@ -279,14 +304,9 @@
 		540A64A622EE78B200470937 /* Release */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
-				CODE_SIGN_STYLE = Manual;
-				COMBINE_HIDPI_IMAGES = YES;
-				DEVELOPMENT_TEAM = "";
 				INFOPLIST_FILE = QLOPML/Info.plist;
-				INSTALL_PATH = /Library/QuickLook;
 				PRODUCT_BUNDLE_IDENTIFIER = de.relikd.QLOPML;
 				PRODUCT_NAME = "$(TARGET_NAME)";
-				PROVISIONING_PROFILE_SPECIFIER = "";
 				WRAPPER_EXTENSION = qlgenerator;
 			};
 			name = Release;

QLOPML.xcodeproj/xcshareddata/xcschemes/QLOPML.xcscheme

@@ -0,0 +1,98 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Scheme
+   LastUpgradeVersion = "1010"
+   version = "1.3">
+   <BuildAction
+      parallelizeBuildables = "YES"
+      buildImplicitDependencies = "YES">
+      <BuildActionEntries>
+         <BuildActionEntry
+            buildForTesting = "YES"
+            buildForRunning = "YES"
+            buildForProfiling = "YES"
+            buildForArchiving = "YES"
+            buildForAnalyzing = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "540A649722EE78B200470937"
+               BuildableName = "QLOPML.qlgenerator"
+               BlueprintName = "QLOPML"
+               ReferencedContainer = "container:QLOPML.xcodeproj">
+            </BuildableReference>
+         </BuildActionEntry>
+      </BuildActionEntries>
+   </BuildAction>
+   <TestAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      shouldUseLaunchSchemeArgsEnv = "YES">
+      <Testables>
+      </Testables>
+   </TestAction>
+   <LaunchAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      launchStyle = "0"
+      useCustomWorkingDirectory = "NO"
+      ignoresPersistentStateOnLaunch = "NO"
+      debugDocumentVersioning = "YES"
+      debugServiceExtension = "internal"
+      allowLocationSimulation = "YES">
+      <PathRunnable
+         runnableDebuggingMode = "0"
+         FilePath = "/usr/bin/qlmanage">
+      </PathRunnable>
+      <MacroExpansion>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "540A649722EE78B200470937"
+            BuildableName = "QLOPML.qlgenerator"
+            BlueprintName = "QLOPML"
+            ReferencedContainer = "container:QLOPML.xcodeproj">
+         </BuildableReference>
+      </MacroExpansion>
+      <CommandLineArguments>
+         <CommandLineArgument
+            argument = "-g &apos;${TARGET_BUILD_DIR}/${WRAPPER_NAME}&apos; -c &apos;org.opml.ompl&apos;"
+            isEnabled = "YES">
+         </CommandLineArgument>
+         <CommandLineArgument
+            argument = "-p &apos;${PROJECT_DIR}/sample.opml&apos;"
+            isEnabled = "YES">
+         </CommandLineArgument>
+         <CommandLineArgument
+            argument = "-t &apos;${PROJECT_DIR}/sample.opml&apos; -s 512"
+            isEnabled = "NO">
+         </CommandLineArgument>
+         <CommandLineArgument
+            argument = "-o &quot;$HOME/Downloads&quot;"
+            isEnabled = "NO">
+         </CommandLineArgument>
+      </CommandLineArguments>
+   </LaunchAction>
+   <ProfileAction
+      buildConfiguration = "Release"
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      savedToolIdentifier = ""
+      useCustomWorkingDirectory = "NO"
+      debugDocumentVersioning = "YES">
+      <MacroExpansion>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "540A649722EE78B200470937"
+            BuildableName = "QLOPML.qlgenerator"
+            BlueprintName = "QLOPML"
+            ReferencedContainer = "container:QLOPML.xcodeproj">
+         </BuildableReference>
+      </MacroExpansion>
+   </ProfileAction>
+   <AnalyzeAction
+      buildConfiguration = "Debug">
+   </AnalyzeAction>
+   <ArchiveAction
+      buildConfiguration = "Release"
+      revealArchiveInOrganizer = "YES">
+   </ArchiveAction>
+</Scheme>

QLOPML/GeneratePreviewForURL.c

@@ -0,0 +1,29 @@
+#include <CoreFoundation/CoreFoundation.h>
+#include <CoreServices/CoreServices.h>
+#include <QuickLook/QuickLook.h>
+#include "opml-lib.h"
+
+OSStatus GeneratePreviewForURL(void *thisInterface, QLPreviewRequestRef preview, CFURLRef url, CFStringRef contentTypeUTI, CFDictionaryRef options);
+void CancelPreviewGeneration(void *thisInterface, QLPreviewRequestRef preview);
+
+/* -----------------------------------------------------------------------------
+   Generate a preview for file
+
+   This function's job is to create preview for designated file
+   ----------------------------------------------------------------------------- */
+
+OSStatus GeneratePreviewForURL(void *thisInterface, QLPreviewRequestRef preview, CFURLRef url, CFStringRef contentTypeUTI, CFDictionaryRef options)
+{
+	CFBundleRef bundle = QLPreviewRequestGetGeneratorBundle(preview);
+	CFDataRef data = generateHTML(url, bundle, false);
+	if (data) {
+		QLPreviewRequestSetDataRepresentation(preview, data, kUTTypeHTML, NULL);
+		CFRelease(data);
+	}
+    return noErr;
+}
+
+void CancelPreviewGeneration(void *thisInterface, QLPreviewRequestRef preview)
+{
+    // Implement only if supported
+}

QLOPML/GenerateThumbnailForURL.c

@@ -1,6 +1,7 @@
 #include <CoreFoundation/CoreFoundation.h>
 #include <CoreServices/CoreServices.h>
 #include <QuickLook/QuickLook.h>
+#include "opml-lib.h"
 
 OSStatus GenerateThumbnailForURL(void *thisInterface, QLThumbnailRequestRef thumbnail, CFURLRef url, CFStringRef contentTypeUTI, CFDictionaryRef options, CGSize maxSize);
 void CancelThumbnailGeneration(void *thisInterface, QLThumbnailRequestRef thumbnail);
@@ -13,10 +14,27 @@ void CancelThumbnailGeneration(void *thisInterface, QLThumbnailRequestRef thumbn
 
 OSStatus GenerateThumbnailForURL(void *thisInterface, QLThumbnailRequestRef thumbnail, CFURLRef url, CFStringRef contentTypeUTI, CFDictionaryRef options, CGSize maxSize)
 {
-	// TODO: generate icon with feed count?
+	// test with:
-//	CGImageRef image = CGImageCreate...
+	// rm -rf ~/Library/QuickLook/QLOPML.qlgenerator && qlmanage -r && rsync -a ~/Library/Developer/Xcode/DerivedData/QLOPML-*/Build/Products/Debug/QLOPML.qlgenerator ~/Library/QuickLook/ && qlmanage -t sample.opml -s 512 -i
-//	QLThumbnailRequestSetImage(thumbnail, image, NULL);
+	CFBundleRef bundle = QLThumbnailRequestGetGeneratorBundle(thumbnail);
+	CFDataRef data = generateHTML(url, bundle, true);
+	if (data) {
+		QLThumbnailRequestSetThumbnailWithDataRepresentation(thumbnail, data, kUTTypeHTML, NULL, NULL);
+		CFRelease(data);
+	}
     return noErr;
+	
+//	CGSize thumbSize = CGSizeMake(maxSize.width * (600/800.0), maxSize.height);
+//	// Draw the webview in the correct context
+//	CGContextRef context = QLThumbnailRequestCreateContext(thumbnail, thumbSize, false, NULL);
+//
+//	if (context) {
+//		CFBundleRef bundle = QLThumbnailRequestGetGeneratorBundle(thumbnail);
+//		renderThumbnail(url, bundle, context, maxSize);
+//		QLThumbnailRequestFlushContext(thumbnail, context);
+//		CFRelease(context);
+//	}
+//	return noErr;
 }
 
 void CancelThumbnailGeneration(void *thisInterface, QLThumbnailRequestRef thumbnail)

QLOPML/Info.plist

@@ -11,7 +11,8 @@
 			<string>QLGenerator</string>
 			<key>LSItemContentTypes</key>
 			<array>
-				<string>org.opml</string>
+				<string>org.opml.opml</string>
+				<string>dyn.ah62d4rv4ge8086drru</string>
 			</array>
 		</dict>
 	</array>
@@ -24,7 +25,7 @@
 	<key>CFBundleName</key>
 	<string>$(PRODUCT_NAME)</string>
 	<key>CFBundleShortVersionString</key>
-	<string>1.0</string>
+	<string>1.3</string>
 	<key>CFBundleVersion</key>
 	<string>1</string>
 	<key>CFPlugInDynamicRegisterFunction</key>
@@ -48,7 +49,7 @@
 	<key>NSHumanReadableCopyright</key>
 	<string>Copyright © 2019 relikd. Public Domain.</string>
 	<key>QLNeedsToBeRunInMainThread</key>
-	<false/>
+	<true/>
 	<key>QLPreviewHeight</key>
 	<real>600</real>
 	<key>QLPreviewWidth</key>
@@ -65,9 +66,9 @@
 				<string>public.xml</string>
 			</array>
 			<key>UTTypeDescription</key>
-			<string>OPML file</string>
+			<string>OPML document</string>
 			<key>UTTypeIdentifier</key>
-			<string>org.opml</string>
+			<string>org.opml.opml</string>
 			<key>UTTypeReferenceURL</key>
 			<string>http://dev.opml.org/spec2.html</string>
 			<key>UTTypeTagSpecification</key>
@@ -76,6 +77,12 @@
 				<array>
 					<string>opml</string>
 				</array>
+				<key>public.mime-type</key>
+				<array>
+					<string>text/xml</string>
+					<string>text/x-opml</string>
+					<string>application/xml</string>
+				</array>
 			</dict>
 		</dict>
 	</array>

QLOPML/QLOPML.entitlements

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>com.apple.security.app-sandbox</key>
+	<true/>
+	<key>com.apple.security.files.user-selected.read-only</key>
+	<true/>
+</dict>
+</plist>

QLOPML/opml-lib.h

@@ -0,0 +1,7 @@
+#ifndef opml_lib_h
+#define opml_lib_h
+
+CFDataRef generateHTML(CFURLRef url, CFBundleRef bundle, Boolean thumb);
+//void renderThumbnail(CFURLRef url, CFBundleRef bundle, CGContextRef context, CGSize maxSize);
+
+#endif /* opml_lib_h */

QLOPML/opml-lib.m

@@ -1,36 +1,6 @@
-#include <CoreFoundation/CoreFoundation.h>
+#import <Foundation/Foundation.h>
-#include <CoreServices/CoreServices.h>
+#import <AppKit/AppKit.h>
-#include <QuickLook/QuickLook.h>
+//#import <WebKit/WebKit.h>
-#include <Foundation/Foundation.h>
-#include <AppKit/AppKit.h>
-
-NSData* renderOPML(NSURL* url, CFBundleRef bundle);
-
-OSStatus GeneratePreviewForURL(void *thisInterface, QLPreviewRequestRef preview, CFURLRef url, CFStringRef contentTypeUTI, CFDictionaryRef options);
-void CancelPreviewGeneration(void *thisInterface, QLPreviewRequestRef preview);
-
-/* -----------------------------------------------------------------------------
-   Generate a preview for file
-
-   This function's job is to create preview for designated file
-   ----------------------------------------------------------------------------- */
-
-OSStatus GeneratePreviewForURL(void *thisInterface, QLPreviewRequestRef preview, CFURLRef url, CFStringRef contentTypeUTI, CFDictionaryRef options)
-{
-	// qlmanage -r && qlmanage -p test.opml -o tmp/ && edit tmp/test.opml.qlpreview/Preview.html
-	CFBundleRef bundle = QLPreviewRequestGetGeneratorBundle(preview);
-	CFDataRef data = CFBridgingRetain(renderOPML((__bridge NSURL*)url, bundle));
-	if (data) {
-		QLPreviewRequestSetDataRepresentation(preview, data, kUTTypeHTML, NULL);
-	}
-    return noErr;
-}
-
-void CancelPreviewGeneration(void *thisInterface, QLPreviewRequestRef preview)
-{
-    // Implement only if supported
-}
-
 
 //  ---------------------------------------------------------------
 // |
@@ -52,13 +22,15 @@ void attribute(NSXMLElement *parent, NSString *key, NSString *value) {
 NSXMLElement* section(NSString *title, NSString *container, NSXMLElement *parent) {
 	make(@"h3", title, parent);
 	NSXMLElement *div = make(container, nil, parent);
-	attribute(div, @"class", @"first");
+	attribute(div, @"class", @"section");
 	return div;
 }
 
-void appendNode(NSXMLElement *child, NSXMLElement *parent) {
+void appendNode(NSXMLElement *child, NSXMLElement *parent, Boolean thumb) {
 	
 	if ([child.name isEqualToString:@"head"]) {
+		if (thumb)
+			return;
 		NSXMLElement *dl = section(@"Metadata:", @"dl", parent);
 		for (NSXMLElement *head in child.children) {
 			make(@"dt", head.name, dl);
@@ -68,33 +40,35 @@ void appendNode(NSXMLElement *child, NSXMLElement *parent) {
 	}
 	
 	if ([child.name isEqualToString:@"body"]) {
-		parent = section(@"Content:", @"ul", parent);
+		parent = thumb ? make(@"ul", nil, parent) : section(@"Content:", @"ul", parent);
 		
 	} else if ([child.name isEqualToString:@"outline"]) {
 		if ([child attributeForName:@"separator"].stringValue) {
 			make(@"hr", nil, parent);
 		} else {
 			NSString *desc = [child attributeForName:@"title"].stringValue;
-			NSString *xmlUrl = [child attributeForName:@"xmlUrl"].stringValue;
 			if (!desc || desc.length == 0)
 				desc = [child attributeForName:@"text"].stringValue;
 			// refreshInterval
 			NSXMLElement *li = make(@"li", desc, parent);
+			if (!thumb) {
+				NSString *xmlUrl = [child attributeForName:@"xmlUrl"].stringValue;
 				if (xmlUrl && xmlUrl.length > 0) {
 					[li addChild:[NSXMLNode textWithStringValue:@" — "]];
 					attribute(make(@"a", xmlUrl, li), @"href", xmlUrl);
 				}
 			}
+		}
 		if (child.childCount > 0) {
 			parent = make(@"ul", nil, parent);
 		}
 	}
 	for (NSXMLElement *c in child.children) {
-		appendNode(c, parent);
+		appendNode(c, parent, thumb);
 	}
 }
 
-NSData* renderOPML(NSURL* url, CFBundleRef bundle) {
+NSData* generateHTMLData(NSURL *url, CFBundleRef bundle, Boolean thumb) {
 	NSError *err;
 	NSXMLDocument *doc = [[NSXMLDocument alloc] initWithContentsOfURL:url options:0 error:&err];
 	if (err || !doc) {
@@ -106,22 +80,40 @@ NSData* renderOPML(NSURL* url, CFBundleRef bundle) {
 	NSXMLElement *head = make(@"head", nil, html);
 	make(@"title", @"OPML file", head);
 	
-	CFURLRef path = CFBundleCopyResourceURL(bundle, CFSTR("style"), CFSTR("css"), NULL);
+	CFURLRef path = CFBundleCopyResourceURL(bundle, thumb ? CFSTR("style-thumb") : CFSTR("style"), CFSTR("css"), NULL);
 	NSString *data = [NSString stringWithContentsOfFile:CFBridgingRelease(path) encoding:NSUTF8StringEncoding error:nil];
 	make(@"style", data, head);
 	
 	NSXMLElement *body = make(@"body", nil, html);
 	
-	NSString *appearance = @"light";
-	if (@available(macOS 10.14, *)) {
-		if ([NSAppearance.currentAppearance.name isEqualToString:NSAppearanceNameDarkAqua])
-			appearance = @"dark";
-	}
-	attribute(body, @"class", appearance);
-	
 	for (NSXMLElement *child in doc.children) {
-		appendNode(child, body);
+		appendNode(child, body, thumb);
 	}
 	NSXMLDocument *xml = [NSXMLDocument documentWithRootElement:html];
 	return [xml XMLDataWithOptions:NSXMLNodePrettyPrint | NSXMLNodeCompactEmptyElement];
 }
+
+CFDataRef generateHTML(CFURLRef url, CFBundleRef bundle, Boolean thumb) {
+	return CFBridgingRetain(generateHTMLData((__bridge NSURL*)url, bundle, thumb));
+}
+
+/*void renderThumbnail(CFURLRef url, CFBundleRef bundle, CGContextRef context, CGSize maxSize) {
+	NSData *data = generateHTMLData((__bridge NSURL*)url, bundle, true);
+	if (data) {
+		CGRect rect = CGRectMake(0, 0, 600, 800);
+		float scale = maxSize.height / rect.size.height;
+		
+		WebView *webView = [[WebView alloc] initWithFrame:rect];
+		[webView.mainFrame.frameView scaleUnitSquareToSize:CGSizeMake(scale, scale)];
+		[webView.mainFrame.frameView setAllowsScrolling:NO];
+		[webView.mainFrame loadData:data MIMEType:@"text/html" textEncodingName:@"utf-8" baseURL:nil];
+		
+		while ([webView isLoading])
+		  CFRunLoopRunInMode(kCFRunLoopDefaultMode, 0, true);
+		[webView display];
+		
+		NSGraphicsContext *gc = [NSGraphicsContext graphicsContextWithGraphicsPort:(void *)context
+																		   flipped:webView.isFlipped];
+		[webView displayRectIgnoringOpacity:webView.bounds inContext:gc];
+	}
+}*/

QLOPML/style-thumb.css

@@ -0,0 +1,4 @@
+
+* { font-family: Courier; }
+body { padding: 10px; margin-left: -1.5em; }
+ul { padding: 0 0 1em 1.5em; list-style-type: none; }

QLOPML/style.css

@@ -1,11 +1,12 @@
 
 * { font-family: Courier; }
-body { padding: 30px; }
+body { padding: 30px; background-color: #AAA; color: black; }
 dd, li, hr { font-weight: bold; line-height: 1.5em; }
 ul { list-style-type: none; padding-bottom: 1em; }
 a { font-size: 0.75em; color: #FBA43A; }
-.light { background-color: #AAA; color: black; }
+.section { padding: 1em 1.5em; border-radius: 7px; background-color: #EEE; }
-.dark  { background-color: #555; color: white; }
+
-.first { padding: 1em 1.5em; border-radius: 7px; }
+@media (prefers-color-scheme: dark) {
-.light .first { background-color: #EEE; }
+body { background-color: #555; color: white; }
-.dark  .first { background-color: #222; }
+.section { background-color: #222; }
+}

sample.opml

@@ -0,0 +1,39 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<opml version="1.0">
+    <head>
+        <title>Sample OPML file for RSSReader</title>
+    </head>
+    <body>
+        <outline title="News" text="News">
+            <outline text="Big News Finland" title="Big News Finland" type="rss" xmlUrl="http://www.bignewsnetwork.com/?rss=37e8860164ce009a"/>
+            <outline text="Euronews" title="Euronews" type="rss" xmlUrl="http://feeds.feedburner.com/euronews/en/news/"/>
+            <outline text="Reuters Top News" title="Reuters Top News" type="rss" xmlUrl="http://feeds.reuters.com/reuters/topNews"/>
+            <outline text="Yahoo Europe" title="Yahoo Europe" type="rss" xmlUrl="http://rss.news.yahoo.com/rss/europe"/>
+        </outline>
+
+        <outline title="Leisure" text="Leisure">
+            <outline text="CNN Entertainment" title="CNN Entertainment" type="rss" xmlUrl="http://rss.cnn.com/rss/edition_entertainment.rss"/>
+            <outline text="E! News" title="E! News" type="rss" xmlUrl="http://uk.eonline.com/syndication/feeds/rssfeeds/topstories.xml"/>
+            <outline text="Hollywood Reporter" title="Hollywood Reporter" type="rss" xmlUrl="http://feeds.feedburner.com/thr/news"/>
+            <outline text="Reuters Entertainment" title="Reuters Entertainment" type="rss"  xmlUrl="http://feeds.reuters.com/reuters/entertainment"/>
+            <outline text="Reuters Music News" title="Reuters Music News" type="rss" xmlUrl="http://feeds.reuters.com/reuters/musicNews"/>
+            <outline text="Yahoo Entertainment" title="Yahoo Entertainment" type="rss" xmlUrl="http://rss.news.yahoo.com/rss/entertainment"/>
+        </outline>
+
+        <outline title="Sports" text="Sports">
+            <outline text="Formula 1" title="Formula 1" type="rss" xmlUrl="http://www.formula1.com/rss/news/latest.rss"/>
+            <outline text="MotoGP" title="MotoGP" type="rss" xmlUrl="http://rss.crash.net/crash_motogp.xml"/>
+            <outline text="N.Y.Times Track And Field" title="N.Y.Times Track And Field" type="rss" xmlUrl="http://topics.nytimes.com/topics/reference/timestopics/subjects/t/track_and_field/index.html?rss=1"/>
+            <outline text="Reuters Sports" title="Reuters Sports" type="rss" xmlUrl="http://feeds.reuters.com/reuters/sportsNews"/>
+            <outline text="Yahoo Sports NHL" title="Yahoo Sports NHL" type="rss" xmlUrl="http://sports.yahoo.com/nhl/rss.xml"/>
+            <outline text="Yahoo Sports" title="Yahoo Sports" type="rss" xmlUrl="http://rss.news.yahoo.com/rss/sports"/>
+        </outline>
+
+        <outline title="Tech" text="Tech">
+            <outline text="Coding Horror" title="Coding Horror" type="rss" xmlUrl="http://feeds.feedburner.com/codinghorror/"/>
+            <outline text="Gadget Lab" title="Gadget Lab" type="rss" xmlUrl="http://www.wired.com/gadgetlab/feed/"/>
+            <outline text="Gizmodo" title="Gizmodo" type="rss" xmlUrl="http://gizmodo.com/index.xml"/>
+            <outline text="Reuters Technology" title="Reuters Technology" type="rss" xmlUrl="http://feeds.reuters.com/reuters/technologyNews"/>
+        </outline>
+    </body>
+</opml>