vim-55/src/fold.c

65 static void foldUpdateIEMS __ARGS((win_T *wp, linenr_T top, linenr_T bot));
841  * The changes in lines from top to bot (inclusive).
844 foldUpdate(wp, top, bot)
847     linenr_T	bot;
851     /* Mark all folds from top to bot as maybe-small. */
854 	    && fp->fd_top < bot)
872 	foldUpdateIEMS(wp, top, bot);
2119 static linenr_T foldUpdateIEMSRecurse __ARGS((garray_T *gap, int level, linenr_T startlnum, fline_T *flp, void (*getlevel)__ARGS((fline_T *)), linenr_T bot, int topflags));
2121 static void foldSplit __ARGS((garray_T *gap, int i, linenr_T top, linenr_T bot));
2122 static void foldRemove __ARGS((garray_T *gap, linenr_T top, linenr_T bot));
2134  * Update the folding for window "wp", at least from lines "top" to "bot".
2138 foldUpdateIEMS(wp, top, bot)
2141     linenr_T	bot;
2158 	bot = wp->w_buffer->b_ml.ml_line_count;
2173 	bot += diff_context;
2192     invalid_bot = bot;
2262      * appear). To take that into account we should adjust the value of "bot"
2287 	    if (fold_end_lnum > bot)
2288 		bot = fold_end_lnum;
2293     end = bot;
2355     /* If we updated folds past "bot", need to redraw more lines.  Don't do
2358     if (end != bot)
2375  * "bot", it's "bot" plus one if the fold continues and it's bigger when using
2381  * Below line "bot" there are no changes in the text.
2382  * "flp->lnum", "flp->lnum_save" and "bot" are relative to the start of the
2390  * Returns bot, which may have been increased for lines that also need to be
2394 foldUpdateIEMSRecurse(gap, level, startlnum, flp, getlevel, bot, topflags)
2400     linenr_T	bot;
2430      * Loop over all lines in this fold, or until "bot" is hit.
2457 	if (flp->lnum > bot && !finish && fp != NULL)
2487 		    bot = fp2->fd_top + fp2->fd_len - 1 + fp->fd_top;
2500 		    || flp->lnum_save >= bot
2601 			return bot;
2603 		    /* The new fold continues until bot, unless we find the
2606 		    fp->fd_len = bot - firstlnum + 1;
2655 	    if (bot < flp->lnum)
2656 		bot = flp->lnum;
2663 	    bot = foldUpdateIEMSRecurse(&fp->fd_nested, level + 1,
2665 					      bot - fp->fd_top, fp->fd_flags);
2670 	    bot += fp->fd_top;
2710 	return bot;
2715      * lvl >= level: fold continues below "bot"
2736 	    if (fp->fd_top + fp->fd_len > bot + 1)
2738 		/* fold continued below bot */
2745 		    bot = fp->fd_top + fp->fd_len - 1;
2751 		     * below bot */
2753 		    foldSplit(gap, i, flp->lnum, bot);
2796     if (bot < flp->lnum - 1)
2797 	bot = flp->lnum - 1;
2799     return bot;
2827  * "bot" in two pieces, one ending above "top" and the other starting below
2828  * "bot".
2830  * "bot"!
2833 foldSplit(gap, i, top, bot)
2837     linenr_T	bot;
2846     /* The fold continues below bot, need to split it. */
2850     fp[1].fd_top = bot + 1;
2856     /* Move nested folds below bot to new fold.  There can't be
2857      * any between top and bot, they have been removed by the caller. */
2860     (void)(foldFind(gap1, bot + 1 - fp->fd_top, &fp2));
2879  * Remove folds within the range "top" to and including "bot".
2885  * bot	   2  3  4  5
2891  * 3: split in two parts, one stops above "top", other starts below "bot".
2893  * 5: made to start below "bot".
2897 foldRemove(gap, top, bot)
2900     linenr_T	bot;
2904     if (bot < top)
2913 	    foldRemove(&fp->fd_nested, top - fp->fd_top, bot - fp->fd_top);
2914 	    if (fp->fd_top + fp->fd_len > bot + 1)
2917 		foldSplit(gap, (int)(fp - (fold_T *)gap->ga_data), top, bot);
2928 		|| fp->fd_top > bot)
2930 	    /* 6: Found a fold below bot, can stop looking. */
2937 	    if (fp->fd_top + fp->fd_len - 1 > bot)
2939 		/* 5: Make fold that includes bot start below bot. */
2941 			(linenr_T)0, (long)(bot - fp->fd_top),
2942 			(linenr_T)MAXLNUM, (long)(fp->fd_top - bot - 1));
2943 		fp->fd_len -= bot - fp->fd_top + 1;
2944 		fp->fd_top = bot + 1;