Subject: Re: gitk "hyperlinks" (was Re: Display of merges in gitk)

From: [email-masked]
Date: Fri, 5 Aug 2005 13:51:00 -0500

On Fri, Aug 05, 2005 at 07:37:41AM -0700, Linus Torvalds wrote:
> For 2.6.13 we've been reverting some stuff lately, to make sure we get a 
> stable release. That's fine, and when I revert something I try to mention 
> the commit ID of the thing I revert in the message. Apparently others do 
> too, as indicated by a patch I just got from Petr Vandovec. So we've got 
> for example:
[snipped]

The following code worked for me on a toy commit.  I'm not sure the regular
expression in linkcommits is right if the SHA1 is followed by a colon or a comma,
as I noticed it was in your examples.  If it doesn, then removing the [[:<:]]
and [[:>:]] will probably fix it.

Things that look like SHA1s are highlighted even if they don't actually exist.

There is probably a "more right" place to do the '$ctext tag bind Commit' commands
but I didn't find it right away.

diff --git a/gitk b/gitk
--- a/gitk
+++ b/gitk
@@ -1753,6 +1753,11 @@ proc selectline {l} {
     $ctext conf -state disabled
     set commentend [$ctext index "end - 1c"]
 
+    linkcommits $ctext 0.0 $commentend
+    $ctext tag configure Commit -underline yes -foreground blue
+    $ctext tag bind Commit <Enter> { %W configure -cursor hand2 }
+    $ctext tag bind Commit <Leave> { %W configure -cursor {} }
+    $ctext tag bind Commit <Button-1><ButtonRelease-1> { linkclick %W %x %y }
     $cflist delete 0 end
     $cflist insert end "Comments"
     if {$nparents($id) == 1} {
@@ -1762,6 +1767,30 @@ proc selectline {l} {
     }
 }
 
+proc linkclick {w x y} {
+    set index [$w index @$x,$y]
+    set tags [$w tag names $index]
+    foreach c $tags {
+        if {![string match {C_*} $c]} { continue; }
+        global sha1string
+        set sha1string [string range $c 2 end]
+        gotocommit
+    }
+}
+
+proc linkcommits {w start end} {
+    while {1} {
+        set pos [$w search -regexp {[[:<:]][0-9a-fA-F]{40}[[:>:]]} $start $end]
+        if {$pos == {}} {break}
+        
+        set commit [$w get $pos "$pos+40c"]
+
+        $w tag add Commit $pos "$pos+40c"
+        $w tag add C_$commit $pos "$pos+40c"
+        set start [$w index "$pos+40c"]
+    }
+}
+
 proc selnextline {dir} {
     global selectedline
     if {![info exists selectedline]} return