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authorJakub Narebski <jnareb@gmail.com>2009-09-01 13:39:19 +0200
committerJunio C Hamano <gitster@pobox.com>2009-09-01 08:34:25 -0700
commitc4ccf61f4caf8c293713586531b4a2ea709756c8 (patch)
treeb29a1b285c85904ddbf5da29b9a9b4fbbffd942d /gitweb/gitweb.js
parente206d62a922d80f2d00427ddfb93435adbf1cc59 (diff)
downloadgit-c4ccf61f4caf8c293713586531b4a2ea709756c8.tar.gz
git-c4ccf61f4caf8c293713586531b4a2ea709756c8.tar.xz
gitweb: Create links leading to 'blame_incremental' using JavaScript
The new 'blame_incremental' view requires JavaScript to run. Not all web browsers implement JavaScript (e.g. text browsers such as Lynx), and not all users have JavaScript enabled. Therefore instead of unconditionally linking to 'blame_incremental' view, we use JavaScript to convert those links to lead to view utilizing JavaScript, by adding 'js=1' to link. Currently the only action that takes 'js=1' into account is 'blame', which then acts as if it was called as 'blame_incremental' action. Possible enhancement would be to do JavaScript redirect by setting window.location instead of modifying $format and $action in git_blame_common() subroutine. The only JavaScript-aware/using view is currently 'blame_incremental'. While at it move reading JavaScript to git_footer_html() subroutine. Note that in this view we do not add 'js=1' currently (even though perhaps we should; note that for consistency we should also add 'js=1' in links added by JavaScript part of 'blame_incremental'). This idea was originally implemented by Petr Baudis in http://article.gmane.org/gmane.comp.version-control.git/47614 but it added <script> element with fixBlameLinks() function in page header, to be added as onload event using 'onload' attribute of HTML 'body' element: <body onload="fixBlameLinks();">. This version adds script at then end of page (in the page footer), and uses JavaScript 'window.onload=fixLinks();'. Also in Petr version only links marked with 'blamelink' class were modified, and they were modified by replacing "a=blame" by "a=blame_incremental"... which doesn't work for path_info links, and might replace wrong part if there is "a=blame" in project name, ref name or file name. Slightly different solution was implemented by Martin Koegler in http://thread.gmane.org/gmane.comp.version-control.git/47902/focus=47905 Here GitAddLinks() function was in gitweb.js file, not as contents of <script> element. It was also included in page header (in <head> element) though, which means waiting for a script to load (and run). It was smarter in that to "fix" (modify) link, it split URL, modified value of 'a' parameter, and then recreated modified link. It avoids trouble with "a=blame" as substring in project name or file name, but it doesn't work with path_info URL/link in the way it was written. Signed-off-by: Jakub Narebski <jnareb@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'gitweb/gitweb.js')
-rw-r--r--gitweb/gitweb.js34
1 files changed, 34 insertions, 0 deletions
diff --git a/gitweb/gitweb.js b/gitweb/gitweb.js
index 22570f5e5..91b766e33 100644
--- a/gitweb/gitweb.js
+++ b/gitweb/gitweb.js
@@ -7,6 +7,39 @@
* @license GPLv2 or later
*/
+/* ============================================================ */
+/* functions for generic gitweb actions and views */
+
+/**
+ * used to check if link has 'js' query parameter already (at end),
+ * and other reasons to not add 'js=1' param at the end of link
+ * @constant
+ */
+var jsExceptionsRe = /[;?]js=[01]$/;
+
+/**
+ * Add '?js=1' or ';js=1' to the end of every link in the document
+ * that doesn't have 'js' query parameter set already.
+ *
+ * Links with 'js=1' lead to JavaScript version of given action, if it
+ * exists (currently there is only 'blame_incremental' for 'blame')
+ *
+ * @globals jsExceptionsRe
+ */
+function fixLinks() {
+ var allLinks = document.getElementsByTagName("a") || document.links;
+ for (var i = 0, len = allLinks.length; i < len; i++) {
+ var link = allLinks[i];
+ if (!jsExceptionsRe.test(link)) { // =~ /[;?]js=[01]$/;
+ link.href +=
+ (link.href.indexOf('?') === -1 ? '?' : ';') + 'js=1';
+ }
+ }
+}
+
+
+/* ============================================================ */
+
/*
* This code uses DOM methods instead of (nonstandard) innerHTML
* to modify page.
@@ -89,6 +122,7 @@ function createRequestObject() {
return null;
}
+
/* ============================================================ */
/* utility/helper functions (and variables) */