Fixed logfiles tail bug on FireFox. Actually made it much better so scroll sticks.

git-svn-id: svn://svn.alpinelinux.org/acf/alpine-baselayout/trunk@1665 ab2d0c66-481e-0410-8bed-d214d4d58bed

1 files changed, 22 insertions, 1 deletions

diff --git a/logfiles-tail-html.lsp b/logfiles-tail-html.lsp
index 6bfe26d..72725ad 100644
--- a/logfiles-tail-html.lsp
+++ b/logfiles-tail-html.lsp
@@ -12,7 +12,28 @@
 			{name:'<% io.write(form.value.filename.value) if form.value.grep.value ~= "" then io.write("',grep:'"..form.value.grep.value) end %>', offset:currentoffset},
 			function(data) {
 				data.value.filecontent.value = data.value.filecontent.value.split("\n").join("<br>\n");
-				$("#filecontent").append(data.value.filecontent.value).scrollTop(999999999);
+
+				/* Before updating content, determine where we're scrolled to.  If we're within 25 pixels of
+				   the bottom, we'll stick to the bottom. */
+				var content = $("#filecontent").get(0);
+				var currentHeight = 0;
+				var scrollTop = content.scrollTop;
+				if (content.scrollHeight > 0)
+					currentHeight = content.scrollHeight;
+				else
+					if (content.offsetHeight > 0)
+						currentHeight = content.offsetHeight;
+				if (currentHeight - scrollTop - ((content.style.pixelHeight) ? content.style.pixelHeight : content.offsetHeight) < 25)
+					scrollTop = currentHeight;
+
+				$("#filecontent").append(data.value.filecontent.value);
+
+				/* Now, set the scroll. */
+				if (scrollTop < currentHeight)
+					content.scrollTop = scrollTop;
+				else
+					content.scrollTop = content.scrollHeight;
+
 				currentoffset = data.value.filesize.value;
 				$("DT:contains('File size')").next().text(currentoffset);
 			}