Make (many) trivial substitutions for renamed and
new macros in dispextern.h, frame.h and window.h. (make_window): Initialize new members left_margin_cols, right_margin_cols, left_fringe_width, right_fringe_width, fringes_outside_margins, scroll_bar_width, and vertical_scroll_bar_type. (coordinates_in_window): Adapted to new fringe/margin positions and per-window fringes and scroll-bars. Fix bug related to incorrectly adjusting coordinates by frame's internal_border_width (the effect normally negible since the internal_border_width is typically 0 or 1 pixel, but very noticeable for an internal_border_width of e.g. 25 pixels). Upon successful return (other than ON_NOTHING), the coordinates are now always properly converted to window relative for the given display element. (window_from_coordinates): Add new parameters wx and wy to return the window relative x and y position in the returned window and part. A null arg means, don't return the position. All callers changed. (adjust_window_margins): New function which may reduce the width of the display margins if a window's text area is too small after resizing or splitting windows. (size_window): Fix bug that did not account for display margin widths when checking the minimum width of a window; use adjust_window_margins. (set_window_buffer): Call Fset_window_fringes and Fset_window_scroll_bars to setup per-window elements. Add new arg KEEP_MARGINS_P. Non-nil means to keep window's existing display margin, fringe widths, and scroll bar settings (e.g. after splitting a window or resizing the frame). All callers changed. (Fset_window_buffer): New arg KEEP_MARGINS. All callers changed. (Fsplit_window): Duplicate original window's display margin, fringe, and scroll-bar settings; then call Fset_window_buffer with KEEP_MARGINS non-nil. This fixes a bug which caused a split window to only preserve the display margins in one of the windows. When splitting horisontally, call adjust_window_margins on both windows to ensure that the text area of the new windows is non too narrow. This fixes a bug which could cause emacs to trap if the width of the split window was less than the width of the display margins. (window_box_text_cols): Renamed from window_internal_width. All uses changed. Adapt to per-window fringes and scroll bars. Fix bug that caused vertical separator to be subtracted also on window frames. Fix another bug that did not reduce the returned value by the columns used for display margins. (window_scroll_line_based): Fix bug related to scrolling too much when display margins are present (implicitly fixed by the fix to window_box_text_cols). (scroll_left, scroll_right): Fix bug related to scrolling too far by default when display margins are present (implicitly fixed by the fix to window_box_text_cols). (struct saved_window): Rename members left to left_col, top to top_line, width to total_cols, height to total_lines, orig_top to orig_top_line, orig_height to orig_total_lines. All uses changed. New members left_margin_cols, right_margin_cols, left_fringe_width, right_fringe_width, fringes_outside_margins, scroll_bar_width, and vertical_scroll_bar_type for saving per-window display elements. (Fset_window_configuration): Restore display margins, fringes, and scroll bar settings. This fixes a bug which caused display margins to be discarded when saving and restoring a window configuration. (save_window_save): Save display margins, fringes, and scroll bar settings. This fixes a bug which caused display margins to be discarded when saving and restoring a window configuration. (Fset_window_margins): Do nothing if display margins are not really changed. Otherwise, call adjust_window_margins to ensure the text area doesn't get too narrow. This fixes a bug which could cause emacs to trap if setting display margins wider than the width of the window. (Fset_window_fringes): New defun to allow user to specifically set this window's fringe widths and position vs. display margins. (Fwindow_fringes): New defun to return window's actual fringe settings. (Fset_window_scroll_bars): New defun to allow user to specifically set this window's scroll bar width and position. (Fwindow_scroll_bars): New defun to return window's actual scroll bar settings. (compare_window_configurations): Also compare display margins, fringes, and scroll bar settings. (syms_of_window): Defsubr new defuns for fringe and scroll bars.
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