# highlight.rb $Revision: 1.1 $
#
# ジャンプ先のエレメントをハイライトする。通称「謎JavaScript。最終形態」
# インストールするだけで動作します。
#
# オプション:
#			@options["highlight.color"]:      ハイライトの文字色(省略時:白)
#			@options["highlight.background"]: ハイライトの背景色(省略時:赤)
#
# See: http://tdiary-users.sourceforge.jp/cgi-bin/wiki.cgi?%A5%EA%A5%F3%A5%AF%B8%B5%A4%F2%A4%BF%A4%C9%A4%C3%A4%C6%A4%E2%A1%A2%A4%C9%A4%B3%A4%CE%CF%C3%C2%EA%A4%AB%A4%EF%A4%AB%A4%E9%A4%CA%A4%A4%A4%F3%A4%C7%A4%B9%A4%B1%A4%C9
#

def highlight_init
	@conf['highlight.color'] ||= '#fff'
	@conf['highlight.background'] ||= '#f00'
end

add_footer_proc do
	highlight_init
	<<-SCRIPT
		<script type="text/javascript"><!--
		var highlightStyle = new Object();
		highlightStyle.color = "#{CGI::escapeHTML(@conf['highlight.color'])}";
		highlightStyle.backgroundColor = "#{CGI::escapeHTML(@conf['highlight.background'])}";
		
		var highlightElem = null;
		var saveStyle = null;
		
		function highlightElement(name) {
			if (highlightElem) {
				for (var key in saveStyle) {
					highlightElem.style[key] = saveStyle[key];
				}
				highlightElem = null;
			}
		
			highlightElem = getHighlightElement(name);
			if (!highlightElem) return;
		
			saveStyle = new Object();
			for (var key in highlightStyle) {
				saveStyle[key] = highlightElem.style[key];
				highlightElem.style[key] = highlightStyle[key];
			}
		}
		
		function getHighlightElement(name) {
			for (var i=0; i<document.anchors.length; ++i) {
				var anchor = document.anchors[i];
				if (anchor.name == name) {
					var elem;
					if (anchor.parentElement) {
						elem = anchor.parentElement;
					} else if (anchor.parentNode) {
						elem = anchor.parentNode;
					}
					return elem;
				}
			}
			return null;
		}
		
		if (document.location.hash) {
			highlightElement(document.location.hash.substr(1));
		}
		
		hereURL = document.location.href.split(/\#/)[0];
		for (var i=0; i<document.links.length; ++i) {
			if (hereURL == document.links[i].href.split(/\#/)[0]) {
				document.links[i].onclick = handleLinkClick;
			}
		}
		
		function handleLinkClick() {
			highlightElement(this.hash.substr(1));
		}
		// --></script>
	SCRIPT
end



def highlight_saveconf
	if @mode == 'saveconf' then
		['highlight.color', 'highlight.background'].each do |key|
			@conf[key] = @cgi.params[key][0]
		end
	end
end

add_conf_proc( 'highlight', highlight_conf_label ) do
	highlight_saveconf
	highlight_init
	highlight_conf_html
end

# vim: ts=3