diff mercurial/hgweb/webcommands.py @ 31939:604d31507f86

hgweb: handle a "descend" query parameter in filelog command

When this "descend" query parameter is present along with "linerange"
parameter, we get revisions following line range in descending order. The
parameter has no effect without "linerange".

--- a/mercurial/hgweb/webcommands.py	Mon Jan 16 09:24:47 2017 +0100
+++ b/mercurial/hgweb/webcommands.py	Mon Apr 10 16:23:41 2017 +0200
@@ -979,6 +979,9 @@
     patch = 'patch' in req.form
     if patch:
         lessvars['patch'] = morevars['patch'] = req.form['patch'][0]
+    descend = 'descend' in req.form
+    if descend:
+        lessvars['descend'] = morevars['descend'] = req.form['descend'][0]
 
     count = fctx.filerev() + 1
     start = max(0, count - revcount) # first rev on this page
@@ -1007,8 +1010,11 @@
         # deactivate numeric nav links when linerange is specified as this
         # would required a dedicated "revnav" class
         nav = None
-        ancestors = context.blockancestors(fctx, *lrange)
-        for i, (c, lr) in enumerate(ancestors, 1):
+        if descend:
+            it = context.blockdescendants(fctx, *lrange)
+        else:
+            it = context.blockancestors(fctx, *lrange)
+        for i, (c, lr) in enumerate(it, 1):
             diffs = None
             if patch:
                 diffs = diff(c, linerange=lr)
@@ -1049,6 +1055,7 @@
                 nav=nav,
                 symrev=webutil.symrevorshortnode(req, fctx),
                 entries=entries,
+                descend=descend,
                 patch=patch,
                 latestentry=latestentry,
                 linerange=linerange,