PATCH: vim style text objects

[Oliver Kiddle <okiddle@xxxxxxxxxxx>]

This patches getvirange to support vim style text objects. It does this
by using the mark in addition to the cursor to mark the range.

Using the mark makes more sense than you might first thing. vim
text-objects can also be used in visual mode and in that case are just
setting MARK and CURSOR. Also vim recommends using visual mode if
implementing text-objects in vim script.

I've had to set the mark to -1 to detect if the movement changed it.
That will be user-visible via the MARK parameter.

Oliver

diff --git a/Src/Zle/zle_vi.c b/Src/Zle/zle_vi.c
index 89fa685..76c54ee 100644
--- a/Src/Zle/zle_vi.c
+++ b/Src/Zle/zle_vi.c
@@ -161,12 +161,13 @@ vigetkey(void)
 static int
 getvirange(int wf)
 {
-    int pos = zlecs, ret = 0;
+    int pos = zlecs, mpos = mark, ret = 0;
     int mult1 = zmult, hist1 = histline;
     Thingy k2;
 
     virangeflag = 1;
     wordflag = wf;
+    mark = -1;
     /* use operator-pending keymap if one exists */
     Keymap km = openkeymap("viopp");
     if (km)
@@ -191,6 +192,7 @@ getvirange(int wf)
 		k2 == Th(z_sendbreak)) {
 	    wordflag = 0;
 	    virangeflag = 0;
+	    mark = mpos;
 	    return -1;
 	}
 	/*
@@ -216,13 +218,16 @@ getvirange(int wf)
 	histline = hist1;
 	ZS_memcpy(zleline, lastline, zlell = lastll);
 	zlecs = pos;
+        mark = mpos;
 	return -1;
     }
 
     /* Can't handle an empty file.  Also, if the movement command *
      * failed, or didn't move, it is an error.                    */
-    if (!zlell || (zlecs == pos && virangeflag != 2) || ret == -1)
+    if (!zlell || (zlecs == pos && mark == -1 && virangeflag != 2) || ret == -1) {
+        mark = mpos;
 	return -1;
+    }
 
     /* vi-match-bracket changes the value of virangeflag when *
      * moving to the opening bracket, meaning that we need to *
@@ -236,6 +241,12 @@ getvirange(int wf)
 	zlecs = origcs;
     }
 
+    /* if the mark has moved, ignore the original cursor position *
+     * and use the mark. */
+    if (mark != -1)
+	pos = mark;
+    mark = mpos;
+
     /* Get the range the right way round.  zlecs is placed at the *
      * start of the range, and pos (the return value of this   *
      * function) is the end.                                   */