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copied!<p>Okay, here's the best I could come up with myself. This function starts at the top of the current buffer and using the <code>]c</code> motion it moves through the changes until <code>]c</code> no longer has an effect. It returns the number of changes (or <code>0</code> if the cursor if it is not a diff buffer).</p> <pre><code>function! CountDiffs() let winview = winsaveview() let num_diffs = 0 if &diff let pos = getpos(".") keepj sil exe 'normal! G' let lnum = 1 let moved = 1 while moved let startl = line(".") keepj sil exe 'normal! [c' let moved = line(".") - startl if moved let num_diffs+=1 endif endwhile call winrestview(winview) call setpos(".",pos) endif return num_diffs endfunction </code></pre> <p>It seems to work okay, and isn't a noticeable performance hit when included in my statusline.</p> <p>As for finding the "number" of the current change, here is a function that uses the backward <code>[c</code> motion to count the number of changes before the position of the cursor. The returned value isn't quite right... I think maybe it should only return a number if the cursor is "within" the changed text, rather than after the first line of the change.</p> <pre><code>function! CurrentDiff() if &diff let num_diff = 0 let winview = winsaveview() let pos = getpos(".") let moved = 1 while moved let startl = line(".") keepj sil exe 'normal! [c' let moved = line(".") - startl if moved let num_diff+=1 endif endwhile call winrestview(winview) call setpos(".",pos) return num_diff endif endfunction </code></pre> <p>Again, it seems to behave itself in my statusline and doesn't affect the movement of the cursor. The numbers update properly as changes are copied too/from the buffer.</p> <p>Once the problems have been ironed out I might consider uploading this as a plugin on the Vim website.</p>

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