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e5ee1d2a74
Make ediff cope with having some of its windows (especially the control window) not shown by a custom ediff-window-setup-function. Modernize relevant adjacent code. After this change, one can write a custom ediff-window-setup-function that doesn't show the control window. * doc/misc/ediff.texi (Notes on Heavy-duty Customization): Refine language to explain that the window setup function doesn't have to show all windows. * lisp/vc/ediff-util.el (ediff-select-control-window-on-setup): New variable. (ediff-setup, ediff-recenter, ediff-recenter-one-window) (ediff-recenter-ancestor, ediff-toggle-read-only) (ediff-operate-on-windows, ediff-jump-to-difference-at-point) (ediff-default-suspend-function) (ediff-clone-buffer-for-region-comparison) (ediff-clone-buffer-for-window-comparison): Modernize control flow; select only windows that exist. * lisp/vc/ediff-wind.el (ediff-with-live-window): New convenience macro. (ediff-window-setup-function): Explain relaxed contract. |
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