Thumbnail preview

QLOPML.xcodeproj/project.pbxproj

@@ -11,6 +11,7 @@
 		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 */
@@ -22,7 +23,8 @@
 		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>"; };
-		54BFFC0423D0988A00012FBB /* sample.opml */ = {isa = PBXFileReference; lastKnownFileType = file; path = sample.opml; sourceTree = SOURCE_ROOT; };
+		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>"; };
@@ -66,6 +68,7 @@
 				540A649F22EE78B200470937 /* main.c */,
 				540A64A122EE78B200470937 /* Info.plist */,
 				541EF8B122EEFB2300C415AA /* style.css */,
+				54A75F5F23D1269100754813 /* style-thumb.css */,
 				54BFFC0423D0988A00012FBB /* sample.opml */,
 			);
 			path = QLOPML;
@@ -147,6 +150,7 @@
 			isa = PBXResourcesBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
+				54A75F6023D1269200754813 /* style-thumb.css in Resources */,
 				541EF8B322EEFBEA00C415AA /* style.css in Resources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;

QLOPML/GeneratePreviewForURL.c

@@ -14,9 +14,8 @@ void CancelPreviewGeneration(void *thisInterface, QLPreviewRequestRef preview);
 
 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 = renderOPML(url, bundle);
+	CFDataRef data = generateHTML(url, bundle, false);
 	if (data) {
 		QLPreviewRequestSetDataRepresentation(preview, data, kUTTypeHTML, NULL);
 		CFRelease(data);

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

@@ -25,7 +25,7 @@
 	<key>CFBundleName</key>
 	<string>$(PRODUCT_NAME)</string>
 	<key>CFBundleShortVersionString</key>
-	<string>1.2</string>
+	<string>1.3</string>
 	<key>CFBundleVersion</key>
 	<string>1</string>
 	<key>CFPlugInDynamicRegisterFunction</key>
@@ -49,7 +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>

QLOPML/opml-lib.h

@@ -1,6 +1,7 @@
 #ifndef opml_lib_h
 #define opml_lib_h
 
-CFDataRef renderOPML(CFURLRef url, CFBundleRef bundle);
+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

@@ -1,8 +1,6 @@
-//#import <CoreFoundation/CoreFoundation.h>
-//#import <CoreServices/CoreServices.h>
-//#import <QuickLook/QuickLook.h>
 #import <Foundation/Foundation.h>
 #import <AppKit/AppKit.h>
+//#import <WebKit/WebKit.h>
 
 //  ---------------------------------------------------------------
 // |
@@ -28,9 +26,11 @@ NSXMLElement* section(NSString *title, NSString *container, NSXMLElement *parent
 	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);
@@ -40,21 +40,23 @@ 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 (xmlUrl && xmlUrl.length > 0) {
+			if (!thumb) {
-				[li addChild:[NSXMLNode textWithStringValue:@" — "]];
+				NSString *xmlUrl = [child attributeForName:@"xmlUrl"].stringValue;
-				attribute(make(@"a", xmlUrl, li), @"href", xmlUrl);
+				if (xmlUrl && xmlUrl.length > 0) {
+					[li addChild:[NSXMLNode textWithStringValue:@" — "]];
+					attribute(make(@"a", xmlUrl, li), @"href", xmlUrl);
+				}
 			}
 		}
 		if (child.childCount > 0) {
@@ -62,13 +64,13 @@ void appendNode(NSXMLElement *child, NSXMLElement *parent) {
 		}
 	}
 	for (NSXMLElement *c in child.children) {
-		appendNode(c, parent);
+		appendNode(c, parent, thumb);
 	}
 }
 
-CFDataRef renderOPML(CFURLRef url, CFBundleRef bundle) {
+NSData* generateHTMLData(NSURL *url, CFBundleRef bundle, Boolean thumb) {
 	NSError *err;
-	NSXMLDocument *doc = [[NSXMLDocument alloc] initWithContentsOfURL:(__bridge NSURL*)url options:0 error:&err];
+	NSXMLDocument *doc = [[NSXMLDocument alloc] initWithContentsOfURL:url options:0 error:&err];
 	if (err || !doc) {
 		printf("ERROR: %s\n", err.description.UTF8String);
 		return nil;
@@ -78,15 +80,40 @@ CFDataRef renderOPML(CFURLRef 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);
 	
 	for (NSXMLElement *child in doc.children) {
-		appendNode(child, body);
+		appendNode(child, body, thumb);
 	}
 	NSXMLDocument *xml = [NSXMLDocument documentWithRootElement:html];
-	return CFBridgingRetain([xml XMLDataWithOptions:NSXMLNodePrettyPrint | NSXMLNodeCompactEmptyElement]);
+	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; }