/* 

  * Adium is the legal property of its developers, whose names are listed in the copyright file included

  * with this source distribution.

  * 

  * This program 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 2 of the License,

  * or (at your option) any later version.

  * 

  * This program 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 this program; if not,

  * write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

  */

 #import "AIWebkitMessageViewStyle.h"

 #import <AIUtilities/AIColorAdditions.h>

 #import <AIUtilities/AIStringAdditions.h>

 #import <AIUtilities/AIDateFormatterAdditions.h>

 #import <AIUtilities/AIMutableStringAdditions.h>

 #import <Adium/AIAccount.h>

 #import <Adium/AIChat.h>

 #import <Adium/AIContentTopic.h>

 #import <Adium/AIContentContext.h>

 #import <Adium/AIContentMessage.h>

 #import <Adium/AIContentNotification.h>

 #import <Adium/AIContentObject.h>

 #import <Adium/AIContentStatus.h>

 #import <Adium/AIHTMLDecoder.h>

 #import <Adium/AIListObject.h>

 #import <Adium/AIListContact.h>

 #import <Adium/AIService.h>

 #import <Adium/ESFileTransfer.h>

 #import <Adium/AIServiceIcons.h>

 #import <Adium/AIContentControllerProtocol.h>

 #import <Adium/AIStatusIcons.h>

 //

 #define LEGACY_VERSION_THRESHOLD		3	//Styles older than this version are considered legacy

 //

 #define KEY_WEBKIT_VERSION				@"MessageViewVersion"

 //BOM scripts for appending content.

 #define APPEND_MESSAGE_WITH_SCROLL		@"checkIfScrollToBottomIsNeeded(); appendMessage(\"%@\"); scrollToBottomIfNeeded();"

 #define APPEND_NEXT_MESSAGE_WITH_SCROLL	@"checkIfScrollToBottomIsNeeded(); appendNextMessage(\"%@\"); scrollToBottomIfNeeded();"

 #define APPEND_MESSAGE					@"appendMessage(\"%@\");"

 #define APPEND_NEXT_MESSAGE				@"appendNextMessage(\"%@\");"

 #define APPEND_MESSAGE_NO_SCROLL		@"appendMessageNoScroll(\"%@\");"

 #define	APPEND_NEXT_MESSAGE_NO_SCROLL	@"appendNextMessageNoScroll(\"%@\");"

 #define REPLACE_LAST_MESSAGE			@"replaceLastMessage(\"%@\");"

 #define TOPIC_MAIN_DIV					@"<div id=\"topic\"></div>"

 // We set back, when the user finishes editing, the correct topic, which wipes out the existance of the span before. We don't need to undo the dbl click action.

 #define TOPIC_INDIVIDUAL_WRAPPER		@"<span id=\"topicEdit\" ondblclick=\"this.setAttribute('contentEditable', true); this.focus();\">%@</span>"

 @interface NSMutableString (AIKeywordReplacementAdditions)

 - (void) replaceKeyword:(NSString *)word withString:(NSString *)newWord;

 - (void) safeReplaceCharactersInRange:(NSRange)range withString:(NSString *)newWord;

 @end

 @implementation NSMutableString (AIKeywordReplacementAdditions)

 - (void) replaceKeyword:(NSString *)keyWord withString:(NSString *)newWord

 {

 	if(!keyWord) return;

 	if(!newWord) newWord = @"";

 	[self replaceOccurrencesOfString:keyWord

 						  withString:newWord

 							 options:NSLiteralSearch

 							   range:NSMakeRange(0.0, [self length])];

 }

 - (void) safeReplaceCharactersInRange:(NSRange)range withString:(NSString *)newWord

 {

 	if (range.location == NSNotFound || range.length == 0) return;

 	if (!newWord) [self deleteCharactersInRange:range];

 	else [self replaceCharactersInRange:range withString:newWord];

 }

 @end

 //The old code built the paths itself, which follows the filesystem's case sensitivity, so some noobs named stuff wrong. 

 //NSBundle is always case sensitive, so those styles broke (they were already broken on case sensitive hfsx)

 //These methods only check for the all-lowercase variant, so are not suitable for general purpose use.

 @interface NSBundle (StupidCompatibilityHack)

 - (NSString *)semiCaseInsensitivePathForResource:(NSString *)res ofType:(NSString *)type;

 - (NSString *)semiCaseInsensitivePathForResource:(NSString *)res ofType:(NSString *)type inDirectory:(NSString *)dirpath;

 @end

 @implementation NSBundle (StupidCompatibilityHack)

 - (NSString *)semiCaseInsensitivePathForResource:(NSString *)res ofType:(NSString *)type

 {

 	NSString *path = [self pathForResource:res ofType:type];

 	if(!path)

 		path = [self pathForResource:[res lowercaseString] ofType:type];

 	return path;

 }

 - (NSString *)semiCaseInsensitivePathForResource:(NSString *)res ofType:(NSString *)type inDirectory:(NSString *)dirpath

 {

 	NSString *path = [self pathForResource:res ofType:type inDirectory:dirpath];

 	if(!path)

 		path = [self pathForResource:[res lowercaseString] ofType:type inDirectory:dirpath];

 	return path;

 }

 @end

 @interface AIWebkitMessageViewStyle ()

 - (id)initWithBundle:(NSBundle *)inBundle;

 - (void)_loadTemplates;

 - (void)releaseResources;

 - (NSMutableString *)_escapeStringForPassingToScript:(NSMutableString *)inString;

 - (NSString *)noVariantName;

 - (NSString *)iconPathForFileTransfer:(ESFileTransfer *)inObject;

 - (NSString *)statusIconPathForListObject:(AIListObject *)inObject;

 @end

 @implementation AIWebkitMessageViewStyle

 + (id)messageViewStyleFromBundle:(NSBundle *)inBundle

 {

 	return [[[self alloc] initWithBundle:inBundle] autorelease];

 }

 + (id)messageViewStyleFromPath:(NSString *)path

 {

 	NSBundle *styleBundle = [NSBundle bundleWithPath:path];

 	if(styleBundle)

 		return [[[self alloc] initWithBundle:styleBundle] autorelease];

 	return nil;

 }

 /*!

  *	@brief Initialize

  */

 - (id)initWithBundle:(NSBundle *)inBundle

 {

 	if ((self = [super init])) {

 		styleBundle = [inBundle retain];

 		stylePath = [[styleBundle resourcePath] retain];

 		[self reloadStyle];

 	}

 	return self;

 }

 - (void) reloadStyle

 {

 	[self releaseResources];

 	//Default behavior

 	allowTextBackgrounds = YES;

 	/* Our styles are versioned so we can change how they work without breaking compatibility.

 	 *

 	 * Version 0: Initial Webkit Version

 	 * Version 1: Template.html now handles all scroll-to-bottom functionality.  It is no longer required to call the

 	 *            scrollToBottom functions when inserting content.

 	 * Version 2: No significant changes

 	 * Version 3: main.css is no longer a separate style, it now serves as the base stylesheet and is imported by default.

 	 *            The default variant is now a separate file in /variants like all other variants.

 	 *			  Template.html now includes appendMessageNoScroll() and appendNextMessageNoScroll() which behave

 	 *				the same as appendMessage() and appendNextMessage() in Versions 1 and 2 but without scrolling.

 	 * Version 4: Template.html now includes replaceLastMessage()

 	 *            Template.html now defines actionMessageUserName and actionMessageBody for display of /me (actions).

 	 *				 If the style provides a custom Template.html, these classes must be defined.

 	 *				 CSS can be used to customize the appearance of actions.

 	 *			  HTML filters in are now supported in Adium's content filter system; filters can assume Version 4 or later.

 	 */

 	styleVersion = [[styleBundle objectForInfoDictionaryKey:KEY_WEBKIT_VERSION] integerValue];

 	//Pre-fetch our templates

 	[self _loadTemplates];

 	//Style flags

 	allowsCustomBackground = ![[styleBundle objectForInfoDictionaryKey:@"DisableCustomBackground"] boolValue];

 	transparentDefaultBackground = [[styleBundle objectForInfoDictionaryKey:@"DefaultBackgroundIsTransparent"] boolValue];

 	combineConsecutive = ![[styleBundle objectForInfoDictionaryKey:@"DisableCombineConsecutive"] boolValue];

 	NSNumber *tmpNum = [styleBundle objectForInfoDictionaryKey:@"ShowsUserIcons"];

 	allowsUserIcons = (tmpNum ? [tmpNum boolValue] : YES);

 	//User icon masking

 	NSString *tmpName = [styleBundle objectForInfoDictionaryKey:KEY_WEBKIT_USER_ICON_MASK];

 	if (tmpName) userIconMask = [[NSImage alloc] initWithContentsOfFile:[stylePath stringByAppendingPathComponent:tmpName]];

 	NSNumber *allowsColorsNumber = [styleBundle objectForInfoDictionaryKey:@"AllowTextColors"];

 	allowsColors = (allowsColorsNumber ? [allowsColorsNumber boolValue] : YES);

 }

 /*!

  *  @brief release everything we loaded from the style bundle

  */

 - (void)releaseResources

 {

 	//Templates

 	[headerHTML release];

 	[footerHTML release];

 	[baseHTML release];

 	[contentHTML release];

 	[contentInHTML release];

 	[nextContentInHTML release];

 	[contextInHTML release];

 	[nextContextInHTML release];

 	[contentOutHTML release];

 	[nextContentOutHTML release];

 	[contextOutHTML release];

 	[nextContextOutHTML release];

 	[statusHTML release];	

 	[fileTransferHTML release];

 	[topicHTML release];

 	[customBackgroundPath release];

 	[customBackgroundColor release];

 	[userIconMask release];

 }

 /*!

  *	@brief Deallocate

  */

 - (void)dealloc

 {	

 	[styleBundle release];

 	[stylePath release];

 	[self releaseResources];

 	[timeStampFormatter release];

 	[statusIconPathCache release];

 	[super dealloc];

 }

 @synthesize bundle = styleBundle;

 - (BOOL)isLegacy

 {

 	return styleVersion < LEGACY_VERSION_THRESHOLD;

 }

 #pragma mark Settings

 @synthesize allowsCustomBackground, allowsUserIcons, allowsColors, userIconMask;

 - (NSArray *)validSenderColors

 {

 	if(!checkedSenderColors) {

 		NSURL *url = [NSURL fileURLWithPath:[stylePath stringByAppendingPathComponent:@"Incoming/SenderColors.txt"]];

 		NSString *senderColorsFile = [NSString stringWithContentsOfURL:url encoding:NSUTF8StringEncoding error:NULL];

 		if(senderColorsFile)

 			validSenderColors = [[senderColorsFile componentsSeparatedByString:@":"] retain];

 		checkedSenderColors = YES;

 	}

 	return validSenderColors;

 }

 - (BOOL)isBackgroundTransparent

 {

 	//Our custom background is only transparent if the user has set a custom color with an alpha component less than 1.0

 	return ((!customBackgroundColor && transparentDefaultBackground) ||

 		   (customBackgroundColor && [customBackgroundColor alphaComponent] < 0.99));

 }

 - (NSString *)defaultFontFamily

 {

 	NSString *defaultFontFamily = [styleBundle objectForInfoDictionaryKey:KEY_WEBKIT_DEFAULT_FONT_FAMILY];

 	if (!defaultFontFamily) defaultFontFamily = [[NSFont systemFontOfSize:0] familyName];

 	return defaultFontFamily;

 }

 - (NSNumber *)defaultFontSize

 {

 	NSNumber *defaultFontSize = [styleBundle objectForInfoDictionaryKey:KEY_WEBKIT_DEFAULT_FONT_SIZE];

 	if (!defaultFontSize) defaultFontSize = [NSNumber numberWithInteger:[[NSFont systemFontOfSize:0] pointSize]];

 	return defaultFontSize;

 }

 - (BOOL)hasHeader

 {

 	return headerHTML && [headerHTML length];

 }

 - (BOOL)hasTopic

 {

 	return topicHTML && [topicHTML length];

 }

 #pragma mark Behavior

 - (void)setDateFormat:(NSString *)format

 {

 	if (!format || [format length] == 0) {

 		format = [NSDateFormatter localizedDateFormatStringShowingSeconds:NO showingAMorPM:NO];

 	}

 	[timeStampFormatter release];

 	if ([format rangeOfString:@"%"].location != NSNotFound) {

 		/* Support strftime-style format strings, which old message styles may use */

 		timeStampFormatter = [[NSDateFormatter alloc] initWithDateFormat:format allowNaturalLanguage:NO];

 	} else {

 		timeStampFormatter = [[NSDateFormatter alloc] init];

 		[timeStampFormatter	setFormatterBehavior:NSDateFormatterBehavior10_4];

 		[timeStampFormatter setDateFormat:format];

 	}

 }

 @synthesize allowTextBackgrounds, customBackgroundType, customBackgroundColor, showIncomingMessageColors=showIncomingColors, showIncomingMessageFonts=showIncomingFonts, customBackgroundPath, nameFormat, useCustomNameFormat, showHeader, showUserIcons;

 //Templates ------------------------------------------------------------------------------------------------------------

 #pragma mark Templates

 - (NSString *)baseTemplateWithVariant:(NSString *)variant chat:(AIChat *)chat

 {

 	NSMutableString	*templateHTML;

 	// If this is a group chat, we want to include a topic.

 	// Otherwise, if the header is shown, use it.

 	NSString *headerContent = @"";

 	if (showHeader) {

 		if (chat.isGroupChat) {

 			headerContent = (chat.supportsTopic ? TOPIC_MAIN_DIV : @"");

 		} else if (headerHTML) {

 			headerContent = headerHTML;

 		}

 	}

 	//Old styles may be using an old custom 4 parameter baseHTML.  Styles version 3 and higher should

 	//be using the bundled (or a custom) 5 parameter baseHTML.

 	if ((styleVersion < 3) && usingCustomTemplateHTML) {

 		templateHTML = [NSMutableString stringWithFormat:baseHTML,						//Template

 			[[NSURL fileURLWithPath:stylePath] absoluteString],							//Base path

 			[self pathForVariant:variant],												//Variant path

 			headerContent,

 			(footerHTML ? footerHTML : @"")];

 	} else {		

 		templateHTML = [NSMutableString stringWithFormat:baseHTML,						//Template

 			[[NSURL fileURLWithPath:stylePath] absoluteString],							//Base path

 			styleVersion < 3 ? @"" : @"@import url( \"main.css\" );",					//Import main.css for new enough styles

 			[self pathForVariant:variant],												//Variant path

 			headerContent,

 			(footerHTML ? footerHTML : @"")];

 	}

 	return [self fillKeywordsForBaseTemplate:templateHTML chat:chat];

 }

 - (NSString *)templateForContent:(AIContentObject *)content similar:(BOOL)contentIsSimilar

 {

 	NSString	*template;

 	//Get the correct template for what we're inserting

 	if ([[content type] isEqualToString:CONTENT_MESSAGE_TYPE]) {

 		if ([content isOutgoing]) {

 			template = (contentIsSimilar ? nextContentOutHTML : contentOutHTML);

 		} else {

 			template = (contentIsSimilar ? nextContentInHTML : contentInHTML);

 		}

 	} else if ([[content type] isEqualToString:CONTENT_CONTEXT_TYPE]) {

 		if ([content isOutgoing]) {

 			template = (contentIsSimilar ? nextContextOutHTML : contextOutHTML);

 		} else {

 			template = (contentIsSimilar ? nextContextInHTML : contextInHTML);

 		}

 	} else if([[content type] isEqualToString:CONTENT_FILE_TRANSFER_TYPE]) {

 		template = [[fileTransferHTML mutableCopy] autorelease];

 	} else if ([[content type] isEqualToString:CONTENT_TOPIC_TYPE]) {

 		template = topicHTML;

 	}

 	else {

 		template = statusHTML;

 	}

 	return template;

 }

 - (NSString *)completedTemplateForContent:(AIContentObject *)content similar:(BOOL)contentIsSimilar

 {

 	NSMutableString *mutableTemplate = [[self templateForContent:content similar:contentIsSimilar] mutableCopy];

 	if (mutableTemplate) {

 		mutableTemplate = [self fillKeywords:mutableTemplate forContent:content similar:contentIsSimilar];

 	}

 	return [mutableTemplate autorelease];

 }

 /*!

  *	@brief Pre-fetch all the style templates

  *

  *	This needs to be called before either baseTemplate or templateForContent is called

  */

 - (void)_loadTemplates

 {		

 	//Load the style's templates

 	//We can't use NSString's initWithContentsOfFile here.  HTML files are interpreted in the defaultCEncoding

 	//(which varies by system) when read that way.  We want to always interpret the files as UTF8.

 	headerHTML = [[NSString stringWithContentsOfUTF8File:[styleBundle semiCaseInsensitivePathForResource:@"Header" ofType:@"html"]] retain];

 	footerHTML = [[NSString stringWithContentsOfUTF8File:[styleBundle semiCaseInsensitivePathForResource:@"Footer" ofType:@"html"]] retain];

 	topicHTML = [[NSString stringWithContentsOfUTF8File:[styleBundle semiCaseInsensitivePathForResource:@"Topic" ofType:@"html"]] retain];

 	baseHTML = [NSString stringWithContentsOfUTF8File:[styleBundle semiCaseInsensitivePathForResource:@"Template" ofType:@"html"]];

 	//Starting with version 1, styles can choose to not include template.html.  If the template is not included 

 	//Adium's default will be used.  This is preferred since any future template updates will apply to the style

 	if ((!baseHTML || [baseHTML length] == 0) && styleVersion >= 1) {		

 		baseHTML = [NSString stringWithContentsOfUTF8File:[[NSBundle bundleForClass:[self class]] semiCaseInsensitivePathForResource:@"Template" ofType:@"html"]];

 		usingCustomTemplateHTML = NO;

 	} else {

 		usingCustomTemplateHTML = YES;

 		if ([baseHTML rangeOfString:@"function imageCheck()" options:NSLiteralSearch].location != NSNotFound) {

 			/* This doesn't quite fix image swapping on styles with broken image swapping due to custom HTML templates,

 			 * but it improves it. For some reason, the result of using our normal template.html functions is that 

 			 * clicking works once, then the text doesn't allow a return click. This is an improvement compared

 			 * to fully broken behavior in which the return click shows a missing-image placeholder.

 			 */

 			NSMutableString *imageSwapFixedBaseHTML = [[baseHTML mutableCopy] autorelease];

 			[imageSwapFixedBaseHTML replaceOccurrencesOfString:

 			 @"		function imageCheck() {\n"

 			 "			node = event.target;\n"

 			 "			if(node.tagName == 'IMG' && node.alt) {\n"

 			 "				a = document.createElement('a');\n"

 			 "				a.setAttribute('onclick', 'imageSwap(this)');\n"

 			 "				a.setAttribute('src', node.src);\n"

 			 "				text = document.createTextNode(node.alt);\n"

 			 "				a.appendChild(text);\n"

 			 "				node.parentNode.replaceChild(a, node);\n"

 			 "			}\n"

 			 "		}"

 													withString:

 			 @"		function imageCheck() {\n"

 			 "			var node = event.target;\n"

 			 "			if(node.tagName.toLowerCase() == 'img' && !client.zoomImage(node) && node.alt) {\n"

 			 "				var a = document.createElement('a');\n"

 			 "				a.setAttribute('onclick', 'imageSwap(this)');\n"

 			 "				a.setAttribute('src', node.getAttribute('src'));\n"

 			 "				a.className = node.className;\n"

 			 "				var text = document.createTextNode(node.alt);\n"

 			 "				a.appendChild(text);\n"

 			 "				node.parentNode.replaceChild(a, node);\n"

 			 "			}\n"

 			 "		}"

 													   options:NSLiteralSearch];

 			[imageSwapFixedBaseHTML replaceOccurrencesOfString:

 			 @"		function imageSwap(node) {\n"

 			 "			img = document.createElement('img');\n"

 			 "			img.setAttribute('src', node.src);\n"

 			 "			img.setAttribute('alt', node.firstChild.nodeValue);\n"

 			 "			node.parentNode.replaceChild(img, node);\n"

 			 "			alignChat();\n"

 			 "		}"

 													withString:

 			 @"		function imageSwap(node) {\n"

 			 "			var shouldScroll = nearBottom();\n"

 			 "			//Swap the image/text\n"

 			 "			var img = document.createElement('img');\n"

 			 "			img.setAttribute('src', node.getAttribute('src'));\n"

 			 "			img.setAttribute('alt', node.firstChild.nodeValue);\n"

 			 "			img.className = node.className;\n"

 			 "			node.parentNode.replaceChild(img, node);\n"

 			 "			\n"

 			 "			alignChat(shouldScroll);\n"

 			 "		}"

 													   options:NSLiteralSearch];

 			/* Now for ones which don't call alignChat() */

 			[imageSwapFixedBaseHTML replaceOccurrencesOfString:

 			 @"		function imageSwap(node) {\n"

 			 "			img = document.createElement('img');\n"

 			 "			img.setAttribute('src', node.src);\n"

 			 "			img.setAttribute('alt', node.firstChild.nodeValue);\n"

 			 "			node.parentNode.replaceChild(img, node);\n"

 			 "		}"

 													withString:

 			 @"		function imageSwap(node) {\n"

 			 "			var shouldScroll = nearBottom();\n"

 			 "			//Swap the image/text\n"

 			 "			var img = document.createElement('img');\n"

 			 "			img.setAttribute('src', node.getAttribute('src'));\n"

 			 "			img.setAttribute('alt', node.firstChild.nodeValue);\n"

 			 "			img.className = node.className;\n"

 			 "			node.parentNode.replaceChild(img, node);\n"

 			 "		}"

 													   options:NSLiteralSearch];

 			baseHTML = imageSwapFixedBaseHTML;

 		}

 	}

 	[baseHTML retain];

 	//Content Templates

 	contentHTML = [[NSString stringWithContentsOfUTF8File:[styleBundle semiCaseInsensitivePathForResource:@"Content" ofType:@"html"]] retain];

 	contentInHTML = [[NSString stringWithContentsOfUTF8File:[styleBundle semiCaseInsensitivePathForResource:@"Content" ofType:@"html" inDirectory:@"Incoming"]] retain];

 	nextContentInHTML = [[NSString stringWithContentsOfUTF8File:[styleBundle semiCaseInsensitivePathForResource:@"NextContent" ofType:@"html" inDirectory:@"Incoming"]] retain];

 	contentOutHTML = [[NSString stringWithContentsOfUTF8File:[styleBundle semiCaseInsensitivePathForResource:@"Content" ofType:@"html" inDirectory:@"Outgoing"]] retain];

 	nextContentOutHTML = [[NSString stringWithContentsOfUTF8File:[styleBundle semiCaseInsensitivePathForResource:@"NextContent" ofType:@"html" inDirectory:@"Outgoing"]] retain];

 	//Message history

 	contextInHTML = [[NSString stringWithContentsOfUTF8File:[styleBundle semiCaseInsensitivePathForResource:@"Context" ofType:@"html" inDirectory:@"Incoming"]] retain];

 	nextContextInHTML = [[NSString stringWithContentsOfUTF8File:[styleBundle semiCaseInsensitivePathForResource:@"NextContext" ofType:@"html" inDirectory:@"Incoming"]] retain];

 	contextOutHTML = [[NSString stringWithContentsOfUTF8File:[styleBundle semiCaseInsensitivePathForResource:@"Context" ofType:@"html" inDirectory:@"Outgoing"]] retain];

 	nextContextOutHTML = [[NSString stringWithContentsOfUTF8File:[styleBundle semiCaseInsensitivePathForResource:@"NextContext" ofType:@"html" inDirectory:@"Outgoing"]] retain];

 	//Fall back to Resources/Content.html if Incoming isn't present

 	if (!contentInHTML) contentInHTML = [contentHTML retain];

 	//Fall back to Content if NextContent doesn't need to use different HTML

 	if (!nextContentInHTML) nextContentInHTML = [contentInHTML retain];

 	//Fall back to Content if Context isn't present

 	if (!nextContextInHTML) nextContextInHTML = [nextContentInHTML retain];

 	if (!contextInHTML) contextInHTML = [contentInHTML retain];

 	//Fall back to Content if Context isn't present

 	if (!nextContextOutHTML && nextContentOutHTML) nextContextOutHTML = [nextContentOutHTML retain];

 	if (!contextOutHTML && contentOutHTML) contextOutHTML = [contentOutHTML retain];

 	//Fall back to Content if Context isn't present

 	if (!nextContextOutHTML) nextContextOutHTML = [nextContextInHTML retain];

 	if (!contextOutHTML) contextOutHTML = [contextInHTML retain];

 	//Fall back to Incoming if Outgoing doesn't need to be different

 	if (!contentOutHTML) contentOutHTML = [contentInHTML retain];

 	if (!nextContentOutHTML) nextContentOutHTML = [nextContentInHTML retain];

 	//Status

 	statusHTML = [[NSString stringWithContentsOfUTF8File:[styleBundle semiCaseInsensitivePathForResource:@"Status" ofType:@"html"]] retain];

 	//Fall back to Resources/Incoming/Content.html if Status isn't present

 	if (!statusHTML) statusHTML = [contentInHTML retain];

 	//TODO: make a generic Request message, rather than having this ft specific one

 	NSMutableString *fileTransferHTMLTemplate;

 	fileTransferHTMLTemplate = [[NSString stringWithContentsOfUTF8File:[styleBundle semiCaseInsensitivePathForResource:@"FileTransferRequest" ofType:@"html"]] mutableCopy];

 	if(!fileTransferHTMLTemplate) {

 		fileTransferHTMLTemplate = [contentInHTML mutableCopy];

 		[fileTransferHTMLTemplate replaceKeyword:@"%message%"

 									  withString:@"<p><img src=\"%fileIconPath%\" style=\"width:32px; height:32px; vertical-align:middle;\"></img><input type=\"button\" onclick=\"%saveFileAsHandler%\" value=\"Download %fileName%\"></p>"];

 	}

 	[fileTransferHTMLTemplate replaceKeyword:@"Download %fileName%"

 						  withString:[NSString stringWithFormat:AILocalizedString(@"Download %@", "%@ will be a file name"), @"%fileName%"]];

 	fileTransferHTML = fileTransferHTMLTemplate;

 }

 #pragma mark Scripts

 - (NSString *)scriptForAppendingContent:(AIContentObject *)content similar:(BOOL)contentIsSimilar willAddMoreContentObjects:(BOOL)willAddMoreContentObjects replaceLastContent:(BOOL)replaceLastContent

 {

 	NSMutableString	*newHTML;

 	NSString		*script;

 	//If combining of consecutive messages has been disabled, we treat all content as non-similar

 	if (!combineConsecutive) contentIsSimilar = NO;

 	//Fetch the correct template and substitute keywords for the passed content

 	newHTML = [[[self completedTemplateForContent:content similar:contentIsSimilar] mutableCopy] autorelease];

 	//BOM scripts vary by style version

 	if (!usingCustomTemplateHTML && styleVersion >= 4) {

 		/* If we're using the built-in template HTML, we know that it supports our most modern scripts */

 		if (replaceLastContent)

 			script = REPLACE_LAST_MESSAGE;

 		else if (willAddMoreContentObjects) {

 			script = (contentIsSimilar ? APPEND_NEXT_MESSAGE_NO_SCROLL : APPEND_MESSAGE_NO_SCROLL);

 		} else {

 			script = (contentIsSimilar ? APPEND_NEXT_MESSAGE : APPEND_MESSAGE);

 		}

 	} else  if (styleVersion >= 3) {

 		if (willAddMoreContentObjects) {

 			script = (contentIsSimilar ? APPEND_NEXT_MESSAGE_NO_SCROLL : APPEND_MESSAGE_NO_SCROLL);

 		} else {

 			script = (contentIsSimilar ? APPEND_NEXT_MESSAGE : APPEND_MESSAGE);

 		}

 	} else if (styleVersion >= 1) {

 		script = (contentIsSimilar ? APPEND_NEXT_MESSAGE : APPEND_MESSAGE);

 	} else {

 		if (usingCustomTemplateHTML && [content isKindOfClass:[AIContentStatus class]]) {

 			/* Old styles with a custom template.html had Status.html files without 'insert' divs coupled 

 			 * with a APPEND_NEXT_MESSAGE_WITH_SCROLL script which assumes one exists.

 			 */

 			script = APPEND_MESSAGE_WITH_SCROLL;

 		} else {

 			script = (contentIsSimilar ? APPEND_NEXT_MESSAGE_WITH_SCROLL : APPEND_MESSAGE_WITH_SCROLL);

 		}

 	}

 	return [NSString stringWithFormat:script, [self _escapeStringForPassingToScript:newHTML]]; 

 }

 - (NSString *)scriptForChangingVariant:(NSString *)variant

 {

 	AILogWithSignature(@"%@",[NSString stringWithFormat:@"setStylesheet(\"mainStyle\",\"%@\");",[self pathForVariant:variant]]);

 	return [NSString stringWithFormat:@"setStylesheet(\"mainStyle\",\"%@\");",[self pathForVariant:variant]];

 }

 - (NSString *)scriptForScrollingAfterAddingMultipleContentObjects

 {

 	if ((styleVersion >= 3) || !usingCustomTemplateHTML) {

 		return @"alignChat(true);";

 	}

 	return nil;

 }

 /*!

  *	@brief Escape a string for passing to our BOM scripts

  */

 - (NSMutableString *)_escapeStringForPassingToScript:(NSMutableString *)inString

 {	

 	//We need to escape a few things to get our string to the javascript without trouble

 	[inString replaceOccurrencesOfString:@"\\" 

 							  withString:@"\\\\" 

 								 options:NSLiteralSearch];

 	[inString replaceOccurrencesOfString:@"\"" 

 							  withString:@"\\\"" 

 								 options:NSLiteralSearch];

 	[inString replaceOccurrencesOfString:@"\n" 

 							  withString:@"" 

 								 options:NSLiteralSearch];

 	[inString replaceOccurrencesOfString:@"\r" 

 							  withString:@"<br>" 

 								 options:NSLiteralSearch];

 	return inString;

 }

 #pragma mark Variants

 - (NSArray *)availableVariants

 {

 	NSMutableArray	*availableVariants = [NSMutableArray array];

 	//Build an array of all variant names

 	for (NSString *path in [styleBundle pathsForResourcesOfType:@"css" inDirectory:@"Variants"]) {

 		[availableVariants addObject:[[path lastPathComponent] stringByDeletingPathExtension]];

 	}

 	//Style versions before 3 stored the default variant in a separate location.  They also allowed for this

 	//varient name to not be specified, and would substitute a localized string in its place.

 	if (styleVersion < 3) {

 		[availableVariants addObject:[self noVariantName]];

 	}

 	//Alphabetize the variants

 	[availableVariants sortUsingSelector:@selector(compare:)];

 	return availableVariants;

 }

 - (NSString *)pathForVariant:(NSString *)variant

 {

 	//Styles before version 3 stored the default variant in main.css, and not in the variants folder.

 	if (styleVersion < 3 && [variant isEqualToString:[self noVariantName]]) {

 		return @"main.css";

 	} else {

 		return [NSString stringWithFormat:@"Variants/%@.css",variant];

 	}

 }

 /*!

  *	@brief Base variant name for styles before version 2

  */

 - (NSString *)noVariantName

 {

 	NSString	*noVariantName = [styleBundle objectForInfoDictionaryKey:@"DisplayNameForNoVariant"];

 	return noVariantName ? noVariantName : AILocalizedString(@"Normal","Normal style variant menu item");

 }

 + (NSString *)noVariantNameForBundle:(NSBundle *)inBundle

 {

 	NSString	*noVariantName = [inBundle objectForInfoDictionaryKey:@"DisplayNameForNoVariant"];

 	return noVariantName ? noVariantName : AILocalizedString(@"Normal","Normal style variant menu item");	

 }

 - (NSString *)defaultVariant

 {

 	return styleVersion < 3 ? [self noVariantName] : [styleBundle objectForInfoDictionaryKey:@"DefaultVariant"];

 }

 + (NSString *)defaultVariantForBundle:(NSBundle *)inBundle

 {

 	return [[inBundle objectForInfoDictionaryKey:KEY_WEBKIT_VERSION] integerValue] < 3 ? 

 		   [self noVariantNameForBundle:inBundle] : 

 		   [inBundle objectForInfoDictionaryKey:@"DefaultVariant"];

 }

 #pragma mark Keyword replacement

 - (NSMutableString *)fillKeywords:(NSMutableString *)inString forContent:(AIContentObject *)content similar:(BOOL)contentIsSimilar

 {

 	NSDate			*date = nil;

 	NSRange			range;

 	AIListObject	*contentSource = [content source];

 	AIListObject	*theSource = ([contentSource isKindOfClass:[AIListContact class]] ?

 								  [(AIListContact *)contentSource parentContact] :

 								  contentSource);

 	/*

 		htmlEncodedMessage is only encoded correctly for AIContentMessages

 		but we do it up here so that we can check for RTL/LTR text below without

 		having to encode the message twice. This is less than ideal 

 	 */

 	NSString		*htmlEncodedMessage = [AIHTMLDecoder encodeHTML:[content message]

 															headers:NO 

 														   fontTags:showIncomingFonts

 												 includingColorTags:(allowsColors && showIncomingColors)

 													  closeFontTags:YES

 														  styleTags:YES

 										 closeStyleTagsOnFontChange:YES

 													 encodeNonASCII:YES

 													   encodeSpaces:YES

 														 imagesPath:NSTemporaryDirectory()

 												  attachmentsAsText:NO

 										  onlyIncludeOutgoingImages:NO

 													 simpleTagsOnly:NO

 													 bodyBackground:NO

 										        allowJavascriptURLs:NO];

 	if (styleVersion >= 4)

 		htmlEncodedMessage = [adium.contentController filterHTMLString:htmlEncodedMessage

 															   direction:[content isOutgoing] ? AIFilterOutgoing : AIFilterIncoming

 																 content:content];

 	//date

 	if ([content respondsToSelector:@selector(date)])

 		date = [(AIContentMessage *)content date];

 	//Replacements applicable to any AIContentObject

 	[inString replaceKeyword:@"%time%" 

 				  withString:(date ? [timeStampFormatter stringFromDate:date] : @"")];

 	NSString *shortTimeString = (date ? [[NSDateFormatter localizedDateFormatterShowingSeconds:NO showingAMorPM:NO] stringFromDate:date] : @"");

 	[inString replaceKeyword:@"%shortTime%"

 				  withString:shortTimeString];

 	if ([inString rangeOfString:@"%senderStatusIcon%"].location != NSNotFound) {

 		//Only cache the status icon to disk if the message style will actually use it

 		[inString replaceKeyword:@"%senderStatusIcon%"

 					  withString:[self statusIconPathForListObject:theSource]];

 	}

 	//Replaces %localized{x}% with a a localized version of x, searching the style's localizations, and then Adium's localizations

 	do{

 		range = [inString rangeOfString:@"%localized{"];

 		if (range.location != NSNotFound) {

 			NSRange endRange;

 			endRange = [inString rangeOfString:@"}%" options:NSLiteralSearch range:NSMakeRange(NSMaxRange(range), [inString length] - NSMaxRange(range))];

 			if (endRange.location != NSNotFound && endRange.location > NSMaxRange(range)) {

 				NSString *untranslated = [inString substringWithRange:NSMakeRange(NSMaxRange(range), (endRange.location - NSMaxRange(range)))];

 				NSString *translated = [styleBundle localizedStringForKey:untranslated

 																	value:untranslated

 																	table:nil];

 				if (!translated || [translated length] == 0) {

 					translated = [[NSBundle bundleForClass:[self class]] localizedStringForKey:untranslated

 																						 value:untranslated

 																						 table:nil];

 					if (!translated || [translated length] == 0) {

 						translated = [[NSBundle mainBundle] localizedStringForKey:untranslated

 																			value:untranslated

 																			table:nil];

 					}

 				}

 				[inString safeReplaceCharactersInRange:NSUnionRange(range, endRange) 

 											withString:translated];

 			}

 		}

 	} while (range.location != NSNotFound);

 	[inString replaceKeyword:@"%userIcons%"

 				  withString:(showUserIcons ? @"showIcons" : @"hideIcons")];

 	[inString replaceKeyword:@"%messageClasses%"

 				  withString:[(contentIsSimilar ? @"consecutive " : @"") stringByAppendingString:[[content displayClasses] componentsJoinedByString:@" "]]];

 	[inString replaceKeyword:@"%senderColor%"

 				  withString:[NSColor representedColorForObject:contentSource.UID withValidColors:self.validSenderColors]];

 	//HAX. The odd conditional here detects the rtl html that our html parser spits out.

 	[inString replaceKeyword:@"%messageDirection%"

 				  withString:(([inString rangeOfString:@"<DIV dir=\"rtl\">"].location != NSNotFound) ? @"rtl" : @"ltr")];

 	//Replaces %time{x}% with a timestamp formatted like x (using NSDateFormatter)

 	do{

 		range = [inString rangeOfString:@"%time{"];

 		if (range.location != NSNotFound) {

 			NSRange endRange;

 			endRange = [inString rangeOfString:@"}%" options:NSLiteralSearch range:NSMakeRange(NSMaxRange(range), [inString length] - NSMaxRange(range))];

 			if (endRange.location != NSNotFound && endRange.location > NSMaxRange(range)) {

 				if (date) {

 					NSString *timeFormat = [inString substringWithRange:NSMakeRange(NSMaxRange(range), (endRange.location - NSMaxRange(range)))];

 					NSDateFormatter *dateFormatter;

 					if ([timeFormat rangeOfString:@"%"].location != NSNotFound) {

 						/* Support strftime-style format strings, which old message styles may use */

 						dateFormatter = [[NSDateFormatter alloc] initWithDateFormat:timeFormat allowNaturalLanguage:NO];

 					} else {

 						dateFormatter = [[NSDateFormatter alloc] init];

 						[dateFormatter	setFormatterBehavior:NSDateFormatterBehavior10_4];

 						[dateFormatter setDateFormat:timeFormat];

 					}

 					[inString safeReplaceCharactersInRange:NSUnionRange(range, endRange) 

 												withString:[dateFormatter stringFromDate:date]];

 					[dateFormatter release];

 				} else

 					[inString deleteCharactersInRange:NSUnionRange(range, endRange)];

 			}

 		}

 	} while (range.location != NSNotFound);

 	do{

 		range = [inString rangeOfString:@"%userIconPath%"];

 		if (range.location != NSNotFound) {

 			NSString    *userIconPath;

 			NSString	*replacementString;

 			userIconPath = [theSource valueForProperty:KEY_WEBKIT_USER_ICON];

 			if (!userIconPath) {

 				userIconPath = [theSource valueForProperty:@"UserIconPath"];

 			}

 			if (showUserIcons && userIconPath) {

 				replacementString = [NSString stringWithFormat:@"file://%@", userIconPath];

 			} else {

 				replacementString = ([content isOutgoing]

 									 ? @"Outgoing/buddy_icon.png" 

 									 : @"Incoming/buddy_icon.png");

 			}

 			[inString safeReplaceCharactersInRange:range withString:replacementString];